POLYURETHANE-POLYUREA AQUEOUS DISPERSION, PREPARATION METHOD THEREFOR AND USE THEREOF, SLURRY, METHOD FOR PREPARING POLYURETHANE GLOVE, AND POLYURETHANE GLOVE
A polyurethane-polyurea aqueous dispersion, a method for preparing the polyurethane-polyurea aqueous dispersion, a use of the polyurethane-polyurea aqueous dispersion, a slurry containing the polyurethane-polyurea aqueous dispersion, a polyurethane glove and a preparation method therefor. The polyurethane-polyurea aqueous dispersion comprises polyurethane-polyurea having a terminal polycarboxylic acid and/or carboxylate group dispersed in water. The present disclosure effectively reduces the destructive effect of metal ions such as calcium ions from coagulant solutions on dopes containing polyurethane-polyurea aqueous dispersions for preparing gloves, thereby prolonging the service life of the dopes; moreover, the produced gloves have excellent mechanical properties, e.g., improved elongations and excellent tensile strength.
A method for reducing TOC content in salt-containing organic wastewater generated in a DAM preparation process, comprising the following steps: using an extractant to extract an organic waste brine phase; carrying out steam stripping on the extracted waste brine, and adjusting the pH of the waste brine subjected to steam stripping; and then carrying out oxidation treatment. By adjusting the characteristic parameter Q<50 in the organic waste brine phase treatment process, the method achieves precise integration and control of organic waste brine treatment process parameters, thereby achieving the effect of reducing the TOC content in the organic waste brine.
Provided are an ethylene/α-olefin random copolymer and the use thereof. The ethylene/α-olefin random copolymer has the following features: (i) the molar content of a soluble fraction (SF) at 35°C or less, measured by means of elution under gradient heating, is 0.5-3%, wherein the soluble fraction has a weight-average molecular weight of less than or equal to 20,000 g/mol; and (ii) the total branch chain number per thousand carbon atoms in the chain structure of the copolymer is 25-85, and a relationship of highly linear fitting is formed between the branch chain number per thousand carbon atoms of chain segments with different molecular weights and the logarithms of the molecular weights of the chain segments of the copolymer, the determination coefficient R2 of fitting being greater than or equal to 0.75. The copolymer has a fast cross-linking speed and a high cross-linking degree when used in photovoltaic adhesive films, has improved processability, and enables obtained photovoltaic adhesive films to have high light transmittance and good sealing performance.
An L-menthol composition having improved cool sensation diffusion and penetration performance and a use thereof. The L menthol composition mainly comprises L-menthol, D-menthol, L-neoisomenthol, and D-neoisomenthol. On the basis of the total mass of the composition, the sum of the mass contents of L-menthol and D-menthol is greater than 99.50%, and the mass content of L-menthol is greater than 99.00%; and the mass content of L-neoisomenthol is greater than or equal to 0.004%, the sum of the mass contents of L-neoisomenthol and D-neoisomenthol is 0.005-0.050%, the mass content of L-neoisomenthol is greater than the mass content of D-neoisomenthol, and the value of the difference between the mass content of L-neoisomenthol and the mass content of D-neoisomenthol is greater than 0.001%.
HCHOHCHO-25)2210CH3O10Fe3+HCHOFe3+Fe3+ is the content of Fe3+CH3OCH3O is the mass concentration of methanol in the formaldehyde solution; and t is the storage time of the formaldehyde solution.
C07C 209/78 - Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton from carbonyl compounds, e.g. from formaldehyde, and amines having amino groups bound to carbon atoms of six-membered aromatic rings, with formation of methylene-diarylamines
C07C 211/50 - Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring having at least two amino groups bound to the carbon skeleton with at least two amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
C02F 1/26 - Treatment of water, waste water, or sewage by extraction
C02F 1/10 - Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
6.
PREPARATION METHOD FOR DIAMINES AND POLYAMINES OF DIPHENYLMETHANE SERIES
The present invention belongs to the technical field of preparation of diamines and polyamines of diphenylmethane series, and in particular to a preparation method for diamines and polyamines of diphenylmethane series (DAM). That is, before a condensation reaction, a mixing feature parameter of a pre-reaction solution for the condensation reaction is controlled to be 1.0 ≤ M ≤ 1.5; and the pre-reaction solution is a mixed solution formed by premixing a formaldehyde solution and aniline hydrochloride or by premixing the formaldehyde solution and a mixture of the aniline hydrochloride/a condensation reaction solution. In the method of the present invention, the mixing feature parameter M is controlled to be within a suitable range, which can reduce the content of N-methyl impurities and the content of macromolecule polymers in a DAM product to the greatest extent possible, and improve the operation stability of a production device and the quality of downstream products.
C07C 209/78 - Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton from carbonyl compounds, e.g. from formaldehyde, and amines having amino groups bound to carbon atoms of six-membered aromatic rings, with formation of methylene-diarylamines
C07C 211/50 - Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring having at least two amino groups bound to the carbon skeleton with at least two amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
7.
AQUEOUS DISPERSION OF POLYURETHANE OR POLYURETHANE UREA, AND PREPARATION METHOD THEREFOR AND USE THEREOF
The present invention relates to the technical field of adhesives, and provides an aqueous dispersion of polyurethane or polyurethane urea, and a preparation method therefor and a use thereof. The aqueous dispersion provided by the present invention is used as an effective component of an adhesive, and can achieve better damp-heat resistance and hydrolysis resistance and simultaneously achieve good initial adhesion. The aqueous dispersion provided by the present invention is prepared by reacting a composition comprising the following components: a) at least one siloxane compound; b) at least one polyol; c) at least one polyisocyanate; d) at least one hydrophilic compound; e) at least one nonionic hydrophilic compound; and an optional component f): at least one compound containing 1 to 3 amino groups and containing no COOH group. Optionally, the raw materials for preparing the aqueous dispersion further comprise an optional component g): at least one compound containing a COOH group and 1 to 3 amino groups or hydroxyl groups at the same time. Moreover, the acid value of the aqueous dispersion is between 0.005 mgKOH/g and 5 mgKOH/g.
The present invention relates to the technical field of isocyanates. Provided are an isocyanate preparation method and an isocyanate preparation system. Using the method of the present invention for preparing an isocyanate can obviously relieve the problem of system blockage and prolong the operation cycle of reactors. The method comprises the following steps: (1) fractioning a mixed material flow obtained by means of a cold phosgenation reaction on an amine compound and phosgene in the presence of an inert solvent, so as to separate the mixed material flow into a gas phase material flow, a light liquid material flow and a heavy liquid material flow, the light liquid material flow containing light solid particles, the heavy liquid material flow containing heavy solid particles, and the density of the light solid particles being smaller than that of the heavy solid particles; and (2) feeding the light liquid material flow into the bottom of a rectifying column used for carrying out a hot phosgenation reaction, and feeding the heavy liquid material flow into the rectifying column from a position on the rectifying column between a stripping section and a rectifying section, so as to obtain an isocyanate product from the bottom of the rectifying column.
The present invention provides a DAM preparation method beneficial to reducing the content of diphenylmethane diamine. During the preparation of DAM by using the method of the present invention, the condensation reaction characteristic index R is controlled to meet specific requirements, which makes it beneficial to obtaining a DAM product with an appropriate content of diphenylmethane diamine in DAM. The method comprises the following steps: (S1) bringing aniline into contact with at least a part of hydrochloric acid for a reaction to obtain aniline hydrochloride; (S2) subjecting the aniline hydrochloride to a condensation reaction with an aqueous formaldehyde solution to obtain a condensation reaction solution, wherein the aqueous formaldehyde solution is introduced by a single addition or by multiple additions, and in step (S2), a part of hydrochloric acid is optionally added; and (S3) subjecting the condensation reaction solution to a transposition reaction to obtain a transposition reaction solution, wherein in step (S3), a part of hydrochloric acid is optionally added; and during steps (S1) to (S3), the condensation reaction characteristic index R is controlled to satisfy 1
C07C 209/78 - Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton from carbonyl compounds, e.g. from formaldehyde, and amines having amino groups bound to carbon atoms of six-membered aromatic rings, with formation of methylene-diarylamines
C07C 211/50 - Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring having at least two amino groups bound to the carbon skeleton with at least two amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
C07C 265/14 - Derivatives of isocyanic acid containing at least two isocyanate groups bound to the same carbon skeleton
C07C 263/10 - Preparation of derivatives of isocyanic acid by reaction of amines with carbonyl halides, e.g. with phosgene
G16C 20/10 - Analysis or design of chemical reactions, syntheses or processes
Provided are an activated carbon catalyst for phosgene synthesis and a method using same. By controlling a tolerance index a, a tolerance index d, and a tolerance index f of the activated carbon catalyst in phosgene synthesis, the tolerance performance of the activated carbon catalyst in a phosgene synthesis system is effectively improved, leading to an extended operation period. The activated carbon catalyst is suitable for high-temperature operation conditions, enabling the selection of a high-boiling-point substance as a cooling medium for the phosgene synthesis without needing to consider the tolerance of the activated carbon.
The present invention provides a rhamnolipid composition for cleaning silicone oil, comprising, in parts by weight, 10-50 parts of Rha-C10C10 rhamnolipid and 35-85 parts of RhaRha-C10C10 rhamnolipid. The present invention further provides a use of the rhamnolipid composition, and a cleaning agent composition and an industrial cleaning agent which comprise the rhamnolipid composition. The rhamnolipid composition provided by the present invention achieves a balance among emulsibility, wettability and foamability, has high cleaning capability and high cleaning speed, and is very suitable for cleaning and removing silicone oil in the industrial field. The industrial cleaning agent provided by the present invention has excellent silicone oil removing capability, has very wide application potential in the field of industrial cleaning, and is suitable for large-scale production and application.
A high-voltage low-cobalt ternary positive electrode material has a general formula LiaNibCocMndO2, where 0.97≤a≤1.1, 0.5≤b≤0.76, 0≤c≤0.1, 0.24≤d≤0.5, b+c+d=1, and c<0.35d. Compared with the prior art, the positive electrode material can be used at a higher voltage compared to other ternary positive electrode materials which have the same nickel content as the positive electrode material, such that the energy density is increased, and because the positive electrode material has a smaller change in size, the cracking and powdering of the positive electrode material are avoided, the service life of the material is prolonged, and the safety performance of the material is improved.
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
C01G 53/50 - Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2 containing manganese of the type (MnO2)n-, e.g. Li(NixMn1-x)O2 or Li(MyNixMn1-x-y)O2
C01G 53/504 - Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2 containing manganese of the type (MnO2)n-, e.g. Li(NixMn1-x)O2 or Li(MyNixMn1-x-y)O2 containing lithium and cobalt with the molar ratio of nickel with respect to all the metals other than alkali metals higher than or equal to 0.5, e.g. Li(MzNixCoyMn1-x-y-z)O2 with x ≥ 0.5
Provided are an isocyanate composition, a modified isocyanate, a polyurethane resin, and optical materials, and an effective factor of the isocyanate composition is 3.90 to 5.70. By the design and control of effective factor, the isocyanate composition has excellent reactivity and can be used for the preparation of high-performance resins such as polyurethane and polythiourethane without causing undesirable phenomena such as gelation during polymerization. In addition, the isocyanate composition can effectively improve the yellowing resistance, stability and optical performance of polyurethane, polythiourethane and other products, so that the obtained polyurethane and polythiourethane will not exhibit white turbidity and opacity phenomena. The optical material prepared with the isocyanate composition has remarkably reduced yellowness index and remarkably reduced optical deformation occurrence rate, thereby effectively improving the optical properties of the optical material.
A preparation method for diamines and polyamines of the diphenylmethane series. By means of controlling a preparation process for diamines and polyamines of the diphenylmethane series to satisfy that the neutralization phase-separation coefficient M≤1.0, the method can improve the phase separation effect after neutralization while not introducing other substances, thus facilitating stable phase separation, and improving the phase separation efficiency. The preparation method controls the preparation process for the diamines and polyamines of the diphenylmethane series to satisfy that the neutralization phase-separation coefficient M≤1.0, preferably M≤0.8, and more preferably M≤0.5, the neutralization phase-separation coefficient M being calculated according to following equation (I), and R in equation (I) being an aqueous-phase concentration index and being calculated according to following equation (II).
C07C 209/78 - Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton from carbonyl compounds, e.g. from formaldehyde, and amines having amino groups bound to carbon atoms of six-membered aromatic rings, with formation of methylene-diarylamines
C07C 211/50 - Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring having at least two amino groups bound to the carbon skeleton with at least two amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
A polymeric MDI and a preparation method therefor. The polymeric MDI comprises the following components in percentage by mass: 20-65% of methylene diphenyl diisocyanate, 15-40% of dimethylene triphenyl triisocyanate, 5-20% of trimethylene tetraphenyl tetraisocyanate, 1-8% of tetramethylene pentaphenyl pentaisocyanate, 8-30% of polymethylene polyphenyl polyisocyanate and MDI polymer, and 1-2% of uretdione. The polymethylene polyphenyl polyisocyanate is selected from at least one of isocyanates containing six or more phenyl groups. When key indexes of the polymeric MDI such as isocyanate content, viscosity, and NCO mass content, are all normal, the content of uretdione is only 1-2%, the content of uretdione can be further controlled at 1.41-1.92%, and the shelf life at room temperature can be extended to one year or more.
A method for preparing a diphenylmethane-based diamine and polyamine. The method comprises the following steps: S1, subjecting aniline and hydrochloric acid to a salt formation reaction to obtain a mixed solution containing aniline hydrochloride; S2, subjecting the mixed solution containing aniline hydrochloride to a pre-condensation reaction and a transposition reaction with formaldehyde; and S3, neutralizing the reaction solution, which is obtained by means of the transposition reaction, and washing same with water to obtain a polyamine solution, and separating same to obtain a diphenylmethane-based diamine and polyamine, wherein the characteristic number A in the transposition reaction in step S2 is controlled to be 0.5-3, such that the transposition reaction can adapt to different degrees of protonation during the process of manufacturing MDA, the problem of non-uniform distribution of hydrochloric acid at a low degree of protonation during the conventional process is avoided, and the content of macrocyclic substances (having ten or more rings) in the system can also be reduced.
C07C 209/78 - Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton from carbonyl compounds, e.g. from formaldehyde, and amines having amino groups bound to carbon atoms of six-membered aromatic rings, with formation of methylene-diarylamines
C07C 211/50 - Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring having at least two amino groups bound to the carbon skeleton with at least two amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
The present application relates to the technical field of olefin polymerization, and in particular relates to an ethylene/α-olefin copolymer and the use thereof. The ethylene/α-olefin copolymer has the following characteristics: (a) as measured by DSC, the melting peak temperature is 35-100°C, and the width of the melting range is 50-70°C; and (b) dH(90) and dH(100) measured by means of successive self-nucleation/annealing (SSA) using a differential scanning calorimeter satisfy 0≤dH(90)≤2 J/g and dH(100)=0. When the copolymer of the present application is used for preparing a photovoltaic adhesive film, the processing efficiency at a relatively low processing temperature is high, the number of crystal spots in a film product is small, and the requirements of most downstream application scenarios, especially the application requirements of a casting section mold, can be met.
The present application relates to the technical field of olefin polymerization, and in particular to an ethylene/α-olefin copolymer and an application thereof, and a packaging adhesive film composition. The ethylene/α-olefin copolymer has the following characteristics: (a) the melting peak temperature measured by means of a differential scanning calorimeter (DSC) is 30-90°C, and the melting range width measured by means of the DSC is 75-90°C; and (b) dH(90) and dH(100) continuously measured by using the DSC and from nucleation/annealing (SSA), wherein 0≤dH(90)≤2J/g, and dH(100)=0. The ethylene/α-olefin copolymer of the present application has specific property characteristics, and when the polymer is used in an adhesive film processing process, a high degree of crosslinking is still maintained while the mixing time of the polymer and an auxiliary agent is shortened.
A method for improving the quality of an L-menthol product, comprising the following steps: laying L-menthol to be treated to form an L-menthol material layer, and then carrying out curing treatment, wherein the curing treatment needs to meet the following conditions at the same time: the average particle size L of said L-menthol is 0.5-2 cm, the thickness D of the L-menthol material layer is 1-50 cm, the temperature T of the curing treatment is 10-50°C, the time t of the curing treatment is 0.1-24 h, and L, D, T and t need to meet the following relational expression: [Equation].
Disclosed in the present application is a separation process for a high-viscosity rhamnolipid fermentation liquor obtained under an abnormal working condition, which comprises the following steps: 1) adding a soluble inorganic alkali to a high-viscosity rhamnolipid fermentation liquor to adjust the pH value to 10 or above, and performing standing treatment; 2) adding a normal primary alcohol to the rhamnolipid fermentation liquor after the standing treatment and stirring same; (3) performing centrifugal separation on the stirred fermentation liquor, and collecting a supernatant; 4) filtering the supernatant by using an organic microfiltration membrane, and collecting a filtrate; and 5) carrying out vacuum rectification on the filtrate, so as to obtain a rhamnolipid aqueous solution from a column bottom. The separation process provided by the present application involves a simple route; separation devices used therein are all conventional devices; and the separation of rhamnolipid and high-viscosity PHA can be achieved well.
The present invention provides a method for preparing a polyvinylidene fluoride resin. The preparation method comprises: dissolving a polar monomer and a fluorine-containing monomer together in an organic solvent having specific solubility parameters, then adding a fluorine-containing organic amine to the solvent, continuously adding the prepared solvent to a vinylidene fluoride monomer-containing suspension polymerization system for a polymerization reaction, adding a certain amount of an acid to a kettle after the polymerization is complete, and then washing, filtering, and drying the polymerization product to obtain the polyvinylidene fluoride resin. The method for preparing a polyvinylidene fluoride resin according to the present invention solves the problem of uneven distribution of copolymer blocks caused by polymerization activity difference and polarity difference between the vinylidene fluoride monomer, a polar comonomer and a fluorine-containing comonomer, and can prepare a high-performance lithium-ion battery binder having high alkali resistance, high flexibility, high adhesiveness, and excellent heat resistance and chemical resistance.
A continuous fermentation method and system. The continuous fermentation method comprises: inoculating a microbial strain into a continuous fermentation system and carrying out fermentation culture in an aerobic environment; and collecting a fermentation broth and recovering and/or purifying the fermentation broth to obtain a fermentation product, wherein during fermentation culture, on the basis of the microbial concentration in the fermentation tank, the feed rate of the medium fed to the fermentation tank and the discharge rate of the fermentation broth discharged out of the fermentation tank are controlled. By detecting the microbial concentration, the discharge rate is changed in a self-adaptive mode to thus maintain the microbial concentration stable, and serious foaming of a fermentation broth is avoided, so that the continuous fermentation process can be efficiently and stably operated for a long time.
A preparation method for methanesulfonic acid with low sulfate radical residue. The method comprises the following steps: in a tank reactor, taking dimethyl disulfide having the content of dimethyl polysulfide lower than 350 ppm, preferably lower than 220 ppm as a raw material, and enabling the dimethyl disulfide to react in the presence of a catalyst and an oxidizing agent; and after the reaction is completed, carrying out post-treatment on a reaction liquid to obtain methanesulfonic acid. By controlling the content of dimethyl polysulfide in the raw material, the problem that the content of sulfate radicals in a methanesulfonic acid product is high can be solved, the obtained product has high quality, the content of heavy component impurities is also remarkably reduced, the product yield is increased, and a heavy component removal process is simplified or energy consumption is reduced.
C07C 303/16 - Preparation of esters or amides of sulfuric acidsPreparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof by oxidation of thiols, sulfides, hydropolysulfides, or polysulfides with formation of sulfo or halosulfonyl groups
C07C 309/04 - Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton containing only one sulfo group
Provided in the present invention are a rhamnolipid and a use thereof. The Rha-C10C10-type rhamnolipid content in a rhamnolipid composition of the present invention is 10.2%-44% on the basis of the total rhamnolipid mass. The rhamnolipid composition which can be stored for a long time of the present invention has both high foamability and high wettability, and has wide application potential in the field of daily chemical products.
The present invention relates to the field of silicone grease interface materials. Provided are a high-thermal-conductivity silicone grease interface material composition, a silicone grease interface material and a preparation method therefor. On the basis of the composition of the present invention, by using a non-reactive silicone oil as a main silicone oil together with a thermal conductive powder and a special treating agent, a silicone grease interface material having both high thermal conductivity and a relatively low thermal resistance and also having relatively good aging resistance can be prepared. The composition comprises the following components in parts by weight: 1-20 parts, preferably 3-15 parts, of a non-reactive silicone oil; 60-98 parts, preferably 80-95 parts, of a thermal-conductive filler; 0.1-6 parts, preferably 1-4 parts, of a treating agent; and 0.01-1 parts, preferably 0.01-0.5 parts, of an auxiliary agent, wherein the treating agent at least comprises an asymmetric silicone oil, and optionally comprises an alkyl trimethoxy silane.
The present invention relates to the field of polyisocyanate compositions. Provided are a polyisocyanate composition and a coating layer having improved chemical resistance. The coating layer formed by a polyurethane coating composition based on the polyisocyanate composition provided by the present invention has remarkably improved chemical resistance and also has good comprehensive properties, such as good hardness and bending strength. The polyisocyanate composition is derived from at least one diisocyanate selected from aliphatic diisocyanates and cycloaliphatic diisocyanates. Among the compounds contained in the polyisocyanate composition, at least part of the compounds have isocyanurate groups, at least part of the compounds have at least one thioallophanate group, and in the polyisocyanate composition, the equivalent ratio of the thioallophanate groups to the isocyanurate groups is > 0 and ≤ 0.3.
C08G 18/79 - Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
C08G 18/28 - Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
C08G 18/72 - Polyisocyanates or polyisothiocyanates
The present invention provides a method for preparing a solution-type binder and a use thereof. By adding a functional auxiliary agent having a special structure before polymerization, the prepared binder has an ultra-large molecular weight and thus an excellent binding force. In a polymerization system using an aqueous phase as a dispersion medium, the functional auxiliary agent having the specific structure can provide a non-aqueous phase polymerization site, so that a hydrophilic monomer and a weakly hydrophilic monomer achieve better copolymerization and form chemical bonding with the functional auxiliary agent. The chemical bonding enables regulation of the hydrophilicity and hydrophobicity of a polymer, achieving an association and thickening effect of the binder in a slurry. The amount of a thickening dispersant during slurry preparation can be greatly reduced while a relatively high slurry viscosity and suspension property are maintained.
C09J 151/02 - Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsAdhesives based on derivatives of such polymers grafted on to polysaccharides
C09J 151/00 - Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsAdhesives based on derivatives of such polymers
C08F 251/02 - Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof on to cellulose or derivatives thereof
Provided in the present invention are a hydrophilically modified polyisocyanate, and a preparation method therefor and the use thereof. On the basis of the method provided in the present invention, the problems of a slow reaction rate, and resulting products having a high turbidity and being dark in color in existing sulfonic-acid modified polyisocyanate preparation processes can be effectively and synchronously ameliorated. The method comprises: reacting materials containing a component (a), a component (b) and an optional component (c) to obtain the hydrophilically modified polyisocyanate, wherein (a) is at least one polyisocyanate, (b) is at least one sulfamic acid, and (c) is at least one tertiary amine; and in the sulfamic acid, particles with a particle size of ≤900 meshes are less than 10 wt %, preferably less than 5 wt %, and more preferably less than 3 wt %, and particles with a particle size of >40 meshes are less than 10 wt %, preferably less than 5 wt %, and more preferably less than 3 wt %.
A preparation system and method for an isocyanate. The preparation system comprises a cold phosgenation reactor and a hot phosgenation reactor, which are connected in series, wherein the hot phosgenation reactor is used for receiving a material flow output from the cold phosgenation reactor and allows the material flow to undergo a hot phosgenation reaction so as to obtain an isocyanate; the hot phosgenation reactor comprises a rectifying section, a reaction section and a stripping section; a material flow inlet is provided between the rectifying section and the reaction section; and the reaction section comprises a plurality of layers of trays (100), and an outer weir (102) of an overflow weir of the reaction-section tray (100) at each layer has a different angle of inclination, so as to make the residence duration of the material flow on each reaction-section tray (100) greater than a set duration. By means of the solution, the residence duration of the material flow in the reaction section can reach the set duration, and the duration of a reaction of chloroformamide can be adjusted, which can thus reduce the number of solid particles generated, thereby solving the problem of same silting up a reactor.
A fixed valve element, a tray, and a reactor. The fixed valve element comprises a valve cover (5), which is arranged on an opening of the tray by means of a liquid-facing valve leg (2) and a liquid-back valve leg (1). The liquid-back valve leg (1) is located downstream of the liquid-facing valve leg (2) in a material flow direction, and the height of the liquid-back valve leg (1) is greater than the height of the liquid-facing valve leg (2). The liquid-facing valve leg (2) and the liquid-back valve leg (1) are both inclined toward the outside of the opening, and at least one anti-blocking hole is formed in the liquid-back valve leg (1). An anti-blocking baffle (4) is arranged on the anti-blocking hole, and the anti-blocking baffle (4) is at a first angle with respect to the liquid-back valve leg (1). The valve cover (5) is arranged in an inclined form, and the liquid-facing valve leg (2) and the liquid-back valve leg (1) are both inclined toward the outside of the opening, so that solid particles are not prone to staying between the valve legs and the opening. The anti-blocking hole and the anti-blocking baffle (4) are arranged at the liquid-back valve leg (1), so that a back dead zone of the two valve legs is effectively eliminated. In addition, the anti-blocking hole formed on the side can extend the gas-phase travel distance and increase the gas-liquid phase mass transfer efficiency.
Disclosed are a polyurethane-polyurea aqueous dispersion, and a preparation method therefor and a use thereof. The aqueous dispersion comprises a polyurethane-polyurea dispersed therein, containing a terminal carboxyl group, a sulfonate group, and a carboxylate group, and having a specific theoretical molecular weight, wherein the content of the carboxylate group is 1.49-11.9 mmol/100 g, the content of the sulfonate group is 0.26-7.9 mmol/100 g, the content of the terminal carboxyl group is 0.5-3.7 mmol/100 g, the molecular weight is 60,000-390,000, and the specific theoretical molecular weight is a theoretical design molecular weight and is obtained by means of an end-group calculation method. The polyurethane-polyurea aqueous dispersion avoids the problems of glove cracking and pinholes in glove production and improves production stability.
The present invention belongs to the technical field of isocyanate preparation, and particularly relates to a method for preparing an isocyanate. The method comprises: 1) mixing a polyamine solution with a phosgene solution, and carrying out a cold phosgenation reaction so as to generate a gas-liquid-solid three-phase mixed material A; 2) performing segmented control of process conditions of the cold reaction process: carrying out a first-stage reaction on the mixed material A, which mainly involves the cold phosgenation reaction, a cold reaction progress being 50-99.9% and a hot reaction progress being 0-30%, so as to obtain a product B; then carrying out a second-stage reaction on the product B, and introducing a mixture of phosgene and hydrogen chloride into the system at the same time, the cold reaction progress of the second-stage reaction being 90-99.9% and the hot reaction progress being 3-40%, so as to obtain a reaction product C; and 3) introducing the reaction product C into a hot reactor, performing a hot reaction to obtain a product D, and then feeding the product D to a refining system to refine same. The method disclosed by the present invention reduces the L color loss and impurities generated in hot reactions at high temperatures, thereby obtaining a high-quality isocyanate.
The present application provides a preparation method for a thermally expandable microsphere containing hydrophilic organic-modified colloidal silicon dioxide. In the preparation method, hydrophilic organic-modified colloidal silicon dioxide is mixed with a mixture of a monomer material capable of polymerizing to form a thermoplastic polymer shell and at least one foaming agent to form an emulsion, and the emulsion is polymerized to form the thermally expandable microsphere. Surface-modified colloidal silicon dioxide with hydrophilic organic group in the present application has good salt tolerance stability, can be stabilized in brine and is beneficial to the preparation of the thermally expandable microsphere; and the prepared microsphere has a narrow particle size distribution, can be easily dispersed in water and an organic system, and has good wettability. The application also relates to a thermally expandable microsphere and use thereof.
C08J 9/00 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof
C08J 9/14 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
The present invention relates to an isocyanate, and a preparation method therefor and the use thereof. The method comprises the following steps: (1) subjecting an amine compound and phosgene to a phosgenation reaction in a solvent, so as to obtain a first mixed solution containing an isocyanate; (2) removing hydrogen chloride and phosgene from the first mixed solution, so as to obtain a second mixed solution; (3) subjecting the second mixed solution to a first solvent removal treatment, so as to obtain a crude isocyanate product; (4) subjecting the crude isocyanate product to a separation treatment, so as to obtain a polymerized isocyanate product and a third mixed solution, wherein the third mixed solution comprises the solvent and a pure isocyanate; and (5) subjecting the third mixed solution to a second solvent removal treatment, so as to obtain a pure isocyanate product. In the preparation method for an isocyanate in one embodiment of the present invention, process parameters in a plurality of steps are adjusted, and therefore the characteristic index can fall within a specific range, thereby improving the yield and chroma index of the prepared isocyanate product.
The present invention provides a method for recycling cumene in a process of preparing propylene oxide by a cumene co-oxidation method. The method comprises: rectifying and separating the cumene in the reaction solution of α,α-dimethyl benzyl alcohol hydrogenolysis, and removing impurities by means of alkali washing. By controlling the proportion and content of cyclohexanol and phenol therein, the reuse times and recycling rate of recycled cumene can be greatly improved, and the cost of production of the propylene oxide by the cumene co-oxidation method can be effectively reduced.
C07D 301/19 - Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds with organic hydroperoxides
C07D 303/04 - Compounds containing oxirane rings containing only hydrogen and carbon atoms in addition to the ring oxygen atoms
36.
METHOD FOR PREPARING DIPHENYLMETHANE-BASED DIAMINES AND POLYAMINES
The present application relates to a method for preparing diphenylmethane-based diamines and polyamines. By controlling the initial dispersion coefficient ω of the feeding of a raw material, i.e., an aqueous formaldehyde solution, the conversion rate of aniline is enabled to reach 70-99% of the ultimate conversion rate while diphenylmethane-based diamines and polyamines with the same quality are produced and prepared, thereby greatly reducing energy consumption during the recovery of unreacted aniline, and improving the production efficiency of a device. Moreover, the production process is stable, the content of N-methyl impurities in the prepared diphenylmethane-based diamines and polyamines is less than or equal to 0.25%, the distribution of MDAs having different rings meets the downstream production requirement, and there is no obvious blockage caused by macromolecular polymers during a reaction process.
C07C 209/78 - Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton from carbonyl compounds, e.g. from formaldehyde, and amines having amino groups bound to carbon atoms of six-membered aromatic rings, with formation of methylene-diarylamines
C07C 211/50 - Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring having at least two amino groups bound to the carbon skeleton with at least two amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
37.
METHOD FOR PREPARING DIPHENYLMETHANE-BASED DIISOCYANATE AND POLYISOCYANATE
The present invention relates to a method for preparing a diphenylmethane-based diisocyanate and polyisocyanate. The method comprises the following steps: S1. performing a phosgenation reaction on a diphenylmethane-based diamine and polyamine and phosgene in a solvent to obtain a first mixed solution; S2. performing phosgene removal treatment on the first mixed solution to obtain a second mixed solution; S3. performing stripping treatment on the second mixed solution by using HCl gas to obtain a third mixed solution; and S4. performing solvent removal treatment on the third mixed solution to obtain a crude diphenylmethane-based diisocyanate and polyisocyanate product. In the method for preparing a diphenylmethane-based diisocyanate and polyisocyanate as provided by an embodiment of the present invention, by optimizing process parameters of the stripping treatment step, a diphenylmethane-based diisocyanate and polyisocyanate product having a light color can be prepared.
A preparation method for diamines and polyamines of the diphenylmethane series that improve 2,4-MDA selectivity. Formaldehyde and aniline come into contact and react in the presence of an acid catalyst to produce the diamines and polyamines of the diphenylmethane series, and based on the total amount of the acid catalyst, the acid catalyst is added to the reaction system in multiple steps.
C07C 209/78 - Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton from carbonyl compounds, e.g. from formaldehyde, and amines having amino groups bound to carbon atoms of six-membered aromatic rings, with formation of methylene-diarylamines
Provided in the present invention are an ethylene/α-olefin copolymer for a solar cell encapsulation adhesive film, and the use thereof. Using the ethylene/α-olefin copolymer provided in the present invention in a solar cell encapsulation adhesive film can give consideration to both a relatively high vulcanization reaction speed and good anti-PID performance of the solar cell encapsulation adhesive film. The ethylene/α-olefin copolymer for a solar cell encapsulation adhesive film satisfies the following conditions (a) to (c): (a) under an angular frequency condition of 0.1-500 rad/s, the characteristic relaxation time at 190°C is 200.0-500.0 milliseconds; (b) the weight-average molecular weight is 20,000-200,000 g/mol, the density is 0.850 to 0.910 g/cc; and (c) the molecular weight distribution is 1.5-3.
01 - Chemical and biological materials for industrial, scientific and agricultural use
17 - Rubber and plastic; packing and insulating materials
Goods & Services
Caustic alkali; acids; industrial adhesives; industrial
chemicals; esters; catalysts; leather treatment agent other
than oil; chemical additives for use in the manufacture of
cosmetics; chlorine; alkalies; ethers; ketones; aldehydes;
epoxy resins, unprocessed; salts for industrial purposes;
firming agent; chemical preservatives; epihydrin;
polyurethane; carbonates; synthetic resins, unprocessed;
highly absorbent resin (unprocessed synthetic resin);
polyurethane composite polyether (polyurethane foam raw
material); thermoplastic polyurethane elastomer rubber (raw
plastic material in granular or powdered form); polyether;
alcohol; polyols; amine; isocyanate; thickeners (chemicals
for food industry). Semi-processed artificial resins; semi-processed acrylic
resins; non-thermally conductive materials for thermal
insulation; materials for insulation, heat and sound
insulation; semi-processed plastic substances; organic
glass; semi-processed plastic materials in the form of
boards; plastic sealing strips; hoses made of plastic.
41.
POLYETHER POLYOL COMPOSITION, PREPARATION METHOD THEREFOR, AND THE USE THEREOF
212121121112121 are each independently selected from an alkylene group containing 2-3 carbon atoms. Using a flexible polyurethane foam sponge composition provided by the embodiment of the present invention for preparing flexible polyurethane foam sponge can remarkably improve the indentation hardness of the prepared flexible foam sponge.
C08J 11/24 - Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds containing hydroxyl groups
The present invention belongs to the technical field of isocyanate, and provides a method for preparing isocyanate having low chlorinated impurities. According to the method, pretreatment is carried out in two aspects before isocyanate is refined. On one hand, a phosgenation reaction liquid is extracted with cycloalkane, and insoluble substances such as urea and carbodiimide are removed before removal of phosgene, thereby effectively reducing the generation of a phosgene adduct; on the other hand, the phosgene synthesis tail gas, phosgenation reaction tail gas and isocyanate refining tail gas are collected and mixed to serve as a gas stripping agent according to the composition of a target gas, a gas stripping treatment is carried out in the phosgene removal stage, and by controlling the source of the gas stripping agent and the gas composition, phosgene can be rapidly removed, the high-temperature polymerization of isocyanate and the generation of the phosgene adduct are inhibited, the generation of chlorinated isocyanate impurities is fundamentally reduced, and the product quality can be significantly improved.
Disclosed in the present application are a static mixing apparatus and method for phosgene and organic amine. The static mixing apparatus comprises a conduit used for defining a fluid flow path, and a baffle region inside the conduit, the baffle region being a lengthwise region inside the conduit which is formed by baffle blocks and baffle plates distributed at intervals. Using the static mixing apparatus of the present application enables radial turbulence to be enhanced with less pressure energy loss, thereby comprehensively solving the technical problem proposed in the present application.
B01J 19/26 - Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
B01F 25/421 - Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path
B01F 23/213 - Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids
C07C 263/10 - Preparation of derivatives of isocyanic acid by reaction of amines with carbonyl halides, e.g. with phosgene
44.
METHOD FOR PRODUCING SINGLE-CELL PROTEIN BY MEANS OF HIGH-DENSITY FERMENTATION
Disclosed herein is a method for producing a single-cell protein by means of high-density fermentation. The method comprises: inoculating a Yarrowia lipolytica strain into a seed culture medium for seed culture to obtain a seed liquid; and inoculating the seed liquid into a fermentation culture medium for high-density fermentation, and supplementing same with acetic acid and a nitrogen source during the process of high-density fermentation to obtain the single-cell protein, wherein the carbon source of the seed culture medium comprises a first acetate, and the carbon source of the fermentation culture medium comprises a second acetate and/or a ketone compound. In the present application, the compounding of specific materials and processes effectively increases the growth rate of bacteria and the synthesis rate of single-cell proteins, so that the method can realize the high-density fermentation of bacteria and efficient synthesis of single-cell proteins in a short time, a fermentation product with a higher content of crude proteins can be obtained while the culture time of high-density fermentation is significantly shortened, and the production efficiency and yield of single-cell proteins are greatly improved.
C12P 7/64 - FatsFatty oilsEster-type waxesHigher fatty acids, i.e. having at least seven carbon atoms in an unbroken chain bound to a carboxyl groupOxidised oils or fats
Provided in the present invention are polymeric MDI with a low content of halogenated alicyclic hydrocarbons, and a preparation method therefor and the use thereof. The polymeric MDI with a low content of halogenated alicyclic hydrocarbons as provided in present invention is used in a polyurethane adhesive to improve the open time of the polyurethane adhesive. In the polymeric MDI with a low content of halogenated alicyclic hydrocarbons, the content of the halogenated alicyclic hydrocarbons in the polymeric MDI is less than or equal to 15 ppm, preferably less than or equal to 10 ppm, more preferably less than or equal to 5 ppm, and further preferably less than or equal to 1 ppm.
The present invention relates to a method for treating a phenyl isocyanate byproduct and a use thereof. The method comprises the following steps: S1: subjecting a phenyl isocyanate byproduct to first separation treatment, and obtaining a diphenylmethane series diisocyanate and polyisocyanate mixture and a phenyl isocyanate mixture; S2: subjecting the phenyl isocyanate mixture to second separation treatment, and obtaining a phenyl isocyanate concentrate and a solvent; and S3: reacting the phenyl isocyanate concentrate with hydrochloric acid in a reactor, and obtaining aniline hydrochloride. In the method for treating a phenyl isocyanate byproduct according to one embodiment of the present invention, byproducts containing phenyl isocyanate produced in an MDI production process can be efficiently treated, separated phenyl isocyanate can be converted, by means of reaction, into aniline hydrochloride, and the aniline hydrochloride is reused in the MDI production process, which not only reduces the impact of phenyl isocyanate on said production process but also saves production costs.
C07C 209/62 - Preparation of compounds containing amino groups bound to a carbon skeleton by cleaving carbon-to-nitrogen, sulfur-to-nitrogen, or phosphorus-to-nitrogen bonds, e.g. hydrolysis of amides, N-dealkylation of amines or quaternary ammonium compounds
C07C 263/10 - Preparation of derivatives of isocyanic acid by reaction of amines with carbonyl halides, e.g. with phosgene
The present invention belongs to the technical fields of phosgene preparation and isocyanate preparation, and in particular relates to a method for obtaining hydrogen chloride having a low light component content in the process of isocyanate production. The method comprises: (1) synthesizing phosgene from a chlorine stream and a carbon monoxide stream catalyzed by a catalyst; controlling an inlet temperature of a catalyst bed of a phosgene synthesis reactor to be 110°C or above, and a maximum temperature to be 450°C or below; (2) condensing and separating an obtained gas phase stream I, to obtain a liquid phosgene stream having a low light component i content; (3) feeding the liquid phosgene stream into an isocyanate synthesis process for reaction, and condensing and removing impurities from a generated gas phase stream II, to obtain a hydrogen chloride stream having a low light component ii content. The method of the present invention can control the light component impurity content in a hydrogen chloride byproduct material to be within a relatively low range, so that the catalyst temperature of a hydrogen chloride catalytic oxidation reactor using said hydrogen chloride as a raw material remains stable, thereby improving the stability of an isocyanate production process.
Disclosed is a method for preparing diphenylmethane-series diamine and polyamine. Aniline and formaldehyde are subjected to a condensation reaction and a transposition reaction in the presence of an acid catalyst, and are then subjected to neutralization and phase splitting after the reaction is finished to obtain diphenylmethane-series diamine and polyamine. The reaction system contains an inorganic salt of sodium and/or potassium, and the content of the inorganic salt of sodium and potassium accounts for 10 ppm-10% of the total mass of the reaction system. The protonation degree (acid catalyst amount) range of the condensation reaction is widened, such that the reaction is carried out under milder conditions, thereby ensuring that the content of macromolecules and impurities in a product is at a lower level; the phase-splitting density difference during the neutralization process is increased, thereby facilitating an efficient and stable phase-splitting process; and the concentration of waste brine is improved, and the recycling value of the waste brine is increased, such that the subsequent wastewater refining and treatment process can be carried out under lower energy consumption and a simpler process.
C07C 209/78 - Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton from carbonyl compounds, e.g. from formaldehyde, and amines having amino groups bound to carbon atoms of six-membered aromatic rings, with formation of methylene-diarylamines
C07C 209/82 - PurificationSeparationStabilisationUse of additives
49.
CROSSLINKED POLYMER OF UNSATURATED CARBOXYLIC ACID, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Provided in the present invention are a crosslinked polymer of an unsaturated carboxylic acid, and a preparation method therefor and the use thereof. The method comprises: subjecting an unsaturated carboxylic acid product to a polymerization reaction under the action of a crosslinking agent and a radical initiator, wherein the unsaturated carboxylic acid product comprises an unsaturated carboxylic acid and a multimer formed by means of the self-polymerization of the unsaturated carboxylic acid, the content of the multimer in the unsaturated carboxylic acid product being 0.02-1 wt%. The crosslinked polymer of an unsaturated carboxylic acid in an embodiment of the present invention is used in personal care products, and can improve the viscosity and transparency of the product.
C08F 216/12 - Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical by an ether radical
C08F 220/04 - AcidsMetals salts or ammonium salts thereof
C08F 222/14 - Esters having no free carboxylic acid groups
C08F 222/20 - Esters containing oxygen in addition to the carboxy oxygen
A61K 8/81 - Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
Provided in the present invention are a method for preparing a polyolefin elastomer and a composition thereof for use in a photovoltaic encapsulation film, and the use of the polyolefin elastomer and the composition. The polyolefin elastomer is a random or block polymer composed of ethylene and α-olefin, wherein the molecular weight Mw of the polyolefin elastomer is 30,000-200,000; the PDI thereof is 1.5-3; the MFR thereof measured under the conditions of a temperature of 190ºC and a load of 2.16 kg is 1-50 g/10 min; the density thereof is 0.85-0.95 g/cm3; the monomer insertion rate is 10-65 wt%; and during heating and leaching processes of TGIC using trichlorobenzene, the content of soluble substances in a polyolefin resin at 40ºC or lower is 0.1% to 20%. The composition prepared from the elastomer has better optical performance, electrical insulation performance and anti-PID performance when being applied to a photovoltaic encapsulation adhesive film.
The present invention relates to an ethylene/α-olefin copolymer with high light transmittance, satisfying the following conditions (a) to (d): (a) the density is 0.855 g/cm3to 0.885 g/cm3; (b) molecular weight distribution is 1.8 to 3.2; (c) a melt index is 0.3 g/10 min to 40 g/10 min under a load condition of 2.16 kg at 190°C; and (d) it is measured by high-temperature nuclear magnetic resonance carbon spectrum (13C-NMR) that the proportion of an ethylene ternary sequence EEE is less than 70%, and the proportion of EXE+XEX is greater than 10%, wherein E represents an ethylene unit, and X represents an α-olefin unit. The ethylene/α-olefin copolymer of the present invention has low glass transition temperature and high light transmittance, and can be used as a photovoltaic packaging material.
The present invention relates to an ethylene oligomerization process, comprising alternately carrying out a tetramerization reaction of ethylene and a dimerization reaction of ethylene in a reaction container to prepare α-olefin, wherein the reaction temperature of the dimerization reaction is 110-130°C, and the reaction temperature of the tetramerization reaction is 40-80°C.According to the ethylene oligomerization process provided by one embodiment of the present invention, by combining a low-temperature tetramerization reaction of ethylene and a high-temperature dimerization reaction of ethylene, the effect of a by-product polymer on the process flow can be eliminated or reduced, so that long-term stable operation of the ethylene oligomerization process is achieved; and a reaction product can better meet subsequent use requirements.
Disclosed in the present disclosure is a polyisocyanate composition, which comprises an isocyanurate (methyl-substituted IPDI trimer) having a structure A and an isocyanurate (IPDI trimer) having a structure B. By means of limiting the molar ratio of the two isocyanurates, the solubility of the polyisocyanate composition in a non-polar solvent is enhanced, making it convenient for downstream customers to use the polyisocyanate composition.
The present application provides high-refractive-index UV printing ink, and a preparation method therefor and a use thereof. The UV printing ink is composed of certain parts of acrylate resin, a modified inorganic nanoparticle dispersion liquid, acrylate active monomers, and a photoinitiator. The modified inorganic nanoparticle dispersion liquid is obtained by modifying inorganic nanoparticles by means of a silane coupling agent containing a double bond and/or acrylate containing a silane group. Modifying inorganic nanoparticles by means of a silane coupling agent containing a double bond and/or acrylate containing a silane group can effectively relieve the problem of the reduction of the refractive index of inorganic nanoparticles due to modification, and two types of acrylate are compounded to effectively improve the refractive index and the light extraction efficiency of UV printing ink, so that when the UV printing ink is applied to light extraction films, the light-emitting efficiency of a light-emitting layer can be effectively improved.
C09D 11/101 - Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
01 - Chemical and biological materials for industrial, scientific and agricultural use
17 - Rubber and plastic; packing and insulating materials
Goods & Services
Caustic alkali; acids; industrial adhesives; industrial chemicals; esters; catalysts; leather treatment agent other than oil; chemical additives for use in the manufacture of cosmetics; chlorine; alkalies; ethers; ketones; aldehydes; epoxy resins, unprocessed; salts for industrial purposes; firming agent; chemical preservatives; epihydrin; polyurethane; carbonates; synthetic resins, unprocessed; highly absorbent resin (unprocessed synthetic resin); polyurethane composite polyether (polyurethane foam raw material); thermoplastic polyurethane elastomer rubber (raw plastic material in granular or powdered form); polyether; alcohol; polyols; amine; isocyanate; thickeners (chemicals for food industry). Semi-processed artificial resins; semi-processed acrylic resins; non-thermally conductive materials for thermal insulation; materials for insulation, heat and sound insulation; semi-processed plastic substances; organic glass; semi-processed plastic materials in the form of boards; plastic sealing strips; hoses made of plastic.
Disclosed herein is a method for efficiently producing formaldehyde-free veneer manufactured boards, comprising steps of: using wood or non-wood veneer as a raw material; controlling the moisture content of the veneer to within an appropriate range; first applying an accelerant and then applying an isocyanate adhesive; then assembling the veneer into a slab according to a certain rule; carrying out microwave preheating on the slab; and feeding the slab into a hot pressing mechanism to obtain aldehyde-free veneer manufactured boards. In the present method, the process for producing aldehyde-free veneer manufactured boards is simple and easy to implement, hot-pressing production efficiency is high, and the mechanical properties of the boards are excellent.
B27D 1/08 - Manufacture of shaped articlesPresses specially designed therefor
C09J 5/02 - Adhesive processes in generalAdhesive processes not provided for elsewhere, e.g. relating to primers involving pretreatment of the surfaces to be joined
C09J 5/06 - Adhesive processes in generalAdhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
Disclosed herein are a polymer composite, a preparation method therefor and an application thereof. The polymer composite comprises the following components in parts by weight: 100 parts polymer powder, 0.1-3 parts nanoparticle A, and 0.05-1.5 parts nanoparticle B. The particle size of nanoparticle A is smaller than that of nanoparticle B, and the mass ratio of nanoparticle A to nanoparticle B is (1-9):1. The small-particle size and large-particle size nanoparticles used in the present application are compounded in a specific ratio, and the two act synergistically as flow agents for the polymer powder, so that the polymer composite has excellent fluidity, permeability and high temperature stability.
B29B 7/36 - MixingKneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices shaking, oscillating or vibrating
B29K 21/00 - Use of unspecified rubbers as moulding material
B29K 23/00 - Use of polyalkenes as moulding material
B29K 25/00 - Use of polymers of vinyl-aromatic compounds as moulding material
B29K 33/00 - Use of polymers of unsaturated acids or derivatives thereof, as moulding material
B29K 69/00 - Use of polycarbonates as moulding material
B29K 77/00 - Use of polyamides, e.g. polyesteramides, as moulding material
01 - Chemical and biological materials for industrial, scientific and agricultural use
Goods & Services
Polyurethane; Adhesives for use in industry; Chemical additives for use in the manufacture of cosmetics; Chemicals for use in the manufacture of polyurethanes; Curing agent for synthetic resin; Industrial chemicals; Polymers and polymeric additives for use in the manufacture of pharmaceutical preparations, plastics, cosmetics, personal care products, coatings, adhesives, and lubricants; Unprocessed polycarbonate resins; Unprocessed synthetic resins; Unprocessed thermoplastic compounds, thermoplastic elastomer resins and thermoplastic concentrates for use in manufacturing in a wide variety of industries
61.
POLYAMIDE COMPOSITE MEMBRANE AND PREPARATION METHOD THEREFOR
The present application provides a polyamide composite membrane and a preparation method therefor. The preparation method comprises the steps of: 1) mixing a polyfunctional amine containing a halogen atom, a polyfunctional amine and water to obtain an aqueous-phase solution; 2) mixing an amino protective reagent, polyfunctional acyl chloride and a non-polar solvent to obtain an oil-phase solution; 3) coating a base membrane with the aqueous-phase solution, and then making contact with the oil-phase solution for interfacial polymerization reaction to obtain a polyamide composite membrane; 4) placing the polyamide composite membrane in an amino deprotection solution to remove the amino protective reagent; and 5) adding the polyamide composite membrane with the protective reagent removed into an aqueous solution of diazotization reagent for diazotization reaction to generate diazonium salt, and then coupling under an alkaline condition to obtain the polyamide composite membrane. The preparation method of the present application is simple, and the prepared polyamide composite membrane has the advantages of greatly increased water yield and stable desalination rate and capable of withstanding oil pollution, and the industrialization prospect is good.
Disclosed in the present invention are a light colored polyisocyanate having stable activity, a preparation method therefor, and a use thereof. The polyisocyanate contains 0-5 wt% of 2,2-MDI, 0.1-20 wt% of 2,4-MDI, 5-75 wt% of 4,4-MDI, 10-50 wt% of a tricyclic mixture polyphenyl polymethylene polyisocyanate, 5-30 wt% of a tetracyclic mixture polyphenyl polymethylene polyisocyanate, 5-50 wt% of a pentacyclic or above mixture polyphenyl polymethylene polyisocyanate, and heat sensitive chlorine of 1000-3000 ppm, and L*≥70. The polyisocyanate has the advantages of having stable activity and light color.
A multi-layer composite pipeline material and a preparation method therefor. The pipeline material comprises the following layers: I. an outer layer made of a polyamide composition (A), wherein the polyamide composition (A) at least comprises a semi-crystalline polyamide (A1); II. an inner layer made of a polyolefin composition (B), wherein the polyolefin composition (B) at least comprises a copolymer polyethylene (B1); and III. a modified polyolefin material (C) which serves as a bonding layer, is an olefin polymer modified by a polar group and is used for bonding the outer layer I and the inner layer II. The multi-layer composite pipeline material has excellent high temperature resistance and long-term service performance, relatively good strength and low-temperature toughness, and good resistance to media, and can be processed into pipelines of different shapes, broadening the application range of pipelines.
B32B 27/08 - Layered products essentially comprising synthetic resin as the main or only constituent of a layer next to another layer of a specific substance of synthetic resin of a different kind
B32B 27/18 - Layered products essentially comprising synthetic resin characterised by the use of special additives
B32B 27/20 - Layered products essentially comprising synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
B32B 27/22 - Layered products essentially comprising synthetic resin characterised by the use of special additives using plasticisers
B32B 7/12 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties
B29C 48/21 - Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
C08L 77/06 - Polyamides derived from polyamines and polycarboxylic acids
C08L 77/02 - Polyamides derived from omega-amino carboxylic acids or from lactams thereof
The present application relates to an isophorone diisocyanate composition and the use thereof. The content of methylated isophorone diisocyanate (Me-IPDI) in the isophorone diisocyanate composition is 0.002-0.200%. A blocked isocyanate obtained by further blocking the IPDI provided in the present application has a lower deblocking temperature and deblocking stability.
Provided in the present invention are a polyurethane adhesive, a formaldehyde-additive-free presswood pallet, and a preparation method therefor. The present invention relates to the technical field of adhesives for presswood pallets. The polyurethane adhesive provided by the present invention is particularly suitable for mold-pressing products and especially used for formaldehyde-additive-free presswood pallets, and can remarkably improve the production efficiency and improve the mechanical strength of presswood pallets. The polyurethane adhesive is obtained by reacting reaction raw materials comprising a component I and a component II, wherein the component I comprises an isocyanate, and the component II comprises a polyether polyol and a compound A, the polyether polyol being one or more selected from polyethylene oxide polyols and poly(ethylene oxide-propylene oxide) polyols, the compound A being one or more selected from compounds of the following structural formula (I) and structural formula (II), and n in structural formula (I) and structural formula (II) being independently an integer of 1-5.
abcd22, wherein 0.97≤a≤1.1, 0.5≤b≤0.76, 0≤c≤0.1, 0.24≤d≤0.5, b+c+d=1, and c<0.35d. Compared with the prior art, the positive electrode material can be used at a higher voltage compared to other ternary positive electrode materials which have the same nickel content as the positive electrode material, such that the energy density is increased, and because the positive electrode material has a smaller change in size, the cracking and powdering of the positive electrode material are avoided, the service life of the material is prolonged, and the safety performance of the material is improved. Additionally, the positive electrode material has relatively lower content of nickel and cobalt and relatively higher content of manganese, such that the positive electrode material has more excellent cycle performance and high voltage performance, and the use costs of the positive electrode material are reduced.
Disclosed herein are a blocked polyisocyanate composition, and a preparation method therefor and the use thereof. The composition comprises the following two structures, wherein the amount of formula (I) is 0.05-1.5 wt%, preferably 0.1-1 wt%, based on formula (II), and R is formula (A). The blocked polyisocyanate composition has a viscosity of 1000-3000 cP (25ºC), and has good adhesion when used in the field of single-component coatings.
A xylylene diisocynate composition, a preparation method therefor and the use thereof. The xylylene diisocynate composition includes xylylene diisocynate and 0.2-500 ppm of a compound represented by formula (1). A resin prepared from the provided xylylene diisocynate composition has an excellent discoloration resistance and can effectively inhibit yellowing and/or white turbidity thereof.
An isocyanate composition, a modified isocyanate, a polyurethane resin and an optical material, the isocyanate composition having an effective factor of 3.90-5.70. By means of the design and control of the effective factor, the isocyanate composition has excellent reaction activity, and can be used for preparing high-performance resins such as polyurethane and polythiourethane, and does not cause adverse phenomena such as gelation during polymerization processes. In addition, the isocyanate composition can effectively improve the yellowing resistance, stability and optical properties of products such as polyurethane and polythiourethane, such that the obtained polyurethane and polythiourethane are prevented from being white turbid and opaque. The optical material prepared from the isocyanate composition has a remarkably reduced yellowness index and a remarkably reduced occurrence rate of optical deformation, thereby effectively improving the optical properties of the optical material.
C07C 263/10 - Preparation of derivatives of isocyanic acid by reaction of amines with carbonyl halides, e.g. with phosgene
C07C 265/14 - Derivatives of isocyanic acid containing at least two isocyanate groups bound to the same carbon skeleton
C08G 18/76 - Polyisocyanates or polyisothiocyanates cyclic aromatic
C08G 18/75 - Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
C08G 18/38 - Low-molecular-weight compounds having hetero atoms other than oxygen
C08G 18/72 - Polyisocyanates or polyisothiocyanates
G02B 1/00 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements
G02B 1/04 - Optical elements characterised by the material of which they are madeOptical coatings for optical elements made of organic materials, e.g. plastics
70.
ISOCYANATE COMPOSITION, MODIFIED COMPOSITION AND POLYURETHANE ELASTOMER
Disclosed in the present invention are an isocyanate composition, a modified composition, and a polyurethane elastomer, the isocyanate composition having an effective factor of 3.80-5.30. By means of designing and controlling the effective factor, the isocyanate composition has excellent reaction activity and thus can be used for preparing high-performance polyurethane products. The isocyanate composition can improve stability of polyurethane products, and particularly, can remarkably improve resistance to color changes and weather resistance of polyurethane elastomers, suppress increases of color codes and yellowing under humid and hot conditions, and improve the tensile strength and tearing strength of polyurethane elastomers, such that the polyurethane elastomers have excellent comprehensive performance in the areas such as weather resistance, stability and mechanical properties.
Disclosed herein are an isocyanate composition, and a preparation method therefor and the use thereof. The effective factor of the isocyanate composition is 3.70-4.70, and by means of the design and control of the effective factor, the isocyanate composition has good reaction activity and can be used for preparing a high-performance polyurethane product. The isocyanate composition can effectively improve the stability of a polyurethane product; in particular, a polyurethane coating material has good resistance to discoloration and maintains good color stability in a high-temperature and high-humidity environment; and the color difference Δb of a coating is less than or equal to 1.2 after a humidity-heat durability test is conducted for 2000 h, such that the resistance to yellowing and appearance of the coating are significantly improved.
The present invention relates to a production process for crude isocyanate having a low single-benzene-ring impurity content. The production process comprises the following steps: 1) by means of taking an inert organic matter having a low boiling point as a stripping agent, stripping crude isocyanate in a stripping column to remove single-benzene-ring impurity components, so as to obtain a crude isocyanate product having a low single-benzene-ring impurity content; and 2) by means of rectification, separating the single-benzene-ring impurity component/stripping agent and crude isocyanate which are extracted from the top of the stripping column, recycling high-purity crude isocyanate at the bottom of a column, directly introducing stripping agent steam formed at the top of the column into the bottom of the stripping column for stripping, and treating the concentrated single-benzene-ring impurities discharged from the middle of the column as waste liquid. The production process effectively reduces the difficulty of separating single-benzene-ring impurity components from crude isocyanate, realizing simple recovery of high-purity crude isocyanate, and greatly reducing the loss amount of the crude isocyanate.
Disclosed is a preparation method for a low-color number, low-odor polyisocyanate curing agent. The preparation method comprises a step of carrying out a polymerization reaction on a diisocyanate monomer under the action of a trimerization catalyst in a polymerization reaction kettle with continuously flowing inert gas, an upper head of the polymerization reaction kettle being provided with an inert gas inlet pipe, the inert gas inlet pipe being an insertion pipe, and the upper head of the polymerization reaction kettle also being provided with an inert gas outlet and a central stirring shaft; the insertion opening position (A) of the inert gas inlet pipe and the inert gas outlet position (B) on the surface of the upper head form an angle α (∠ACB) with the fixed position (C) of the central stirring shaft projected onto the plane on the upper head surface, where 30°≤α≤180°. The present application can achieve stable catalytic activity of a catalyst by means of controlling the use of nitrogen during the reaction process, which is conducive to stable process control, resulting in a low color number and reduced amine odor in the obtained product.
C08G 18/79 - Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
C08G 18/09 - Processes comprising oligomerisation of isocyanates or isothiocyanates involving reaction of a part of the isocyanate or isothiocyanate groups with each other in the reaction mixture
C07C 263/16 - Preparation of derivatives of isocyanic acid by reactions not involving the formation of isocyanate groups
C07C 265/14 - Derivatives of isocyanic acid containing at least two isocyanate groups bound to the same carbon skeleton
The present invention belongs to the technical field of adhesives for formaldehyde-free artificial boards, and particularly relates to a composition and an adhesive combined material thereof, and a formaldehyde-free artificial board and a preparation method therefor. The adhesive combined material comprises a composition A and a composition B, wherein the composition A comprises a component A1 and a component A2, the component A1 comprises metal ions and a tertiary amine type ethylene oxide derivative, and the component A2 is macrocyclic polyether containing a plurality of oxy-methylene structural units. In the present invention, a formaldehyde-free artificial board is prepared from the adhesive combined material, such that the production efficiency of the formaldehyde-free artificial board can be further improved while good adhesive properties and mechanical properties are maintained.
The present invention provides an isocyanurate-containing polyisocyanate composition with stable chromaticity, and a preparation method thereof, belonging to the technical field of polyisocyanate composition preparation. The preparation method comprises: an isocyanate monomer being polymerized in the presence of a catalyst, after the reaction is terminated, obtaining a prepolymer, subjecting the prepolymer to separation treatment and heat treatment, and obtaining the polyisocyanate composition containing isocyanurate; based on the weight of the polyisocyanate composition, the cleavable amine content of the polyisocyanate composition is less than or equal to 20 ppm. By means of controlling the cleavable amine content of the polyisocyanate composition, the present invention causes the resulting isocyanurate-containing polyisocyanate composition to have stable storage chromaticity, and the present invention has a chrominance increase of ≤10 Hazen when stored at 40° C. for 12 months.
C08L 79/08 - PolyimidesPolyester-imidesPolyamide-imidesPolyamide acids or similar polyimide precursors
C08G 18/18 - Catalysts containing secondary or tertiary amines or salts thereof
C08G 18/09 - Processes comprising oligomerisation of isocyanates or isothiocyanates involving reaction of a part of the isocyanate or isothiocyanate groups with each other in the reaction mixture
C08G 18/10 - Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
77.
POLYURETHANE-POLYUREA AQUEOUS DISPERSION, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Provided in the present invention are a polyurethane-polyurea aqueous dispersion, and a preparation method therefor and the use thereof. The polyurethane-polyurea aqueous dispersion comprises a unit derived from a component a, wherein the component a comprises at least one polyhydric alcohol with a functionality of 2 or more, and the component a comprises at least 40 wt% or more of a semi-crystalline polyester polyol obtained by reacting a dihydric alcohol with a component I, the component I comprising an aliphatic dicarboxylic acid and a component II at a molar ratio of (2.1-10) : 1, and the component II being an aromatic dicarboxylic acid and/or aromatic dicarboxylic acid anhydride. A soft and elastic product prepared on the basis of the polyurethane-polyurea aqueous dispersion provided in the present invention has the comprehensive properties of good elasticity, strength, water resistance, wearability, tactility, etc.
B65B 63/04 - Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged for folding or winding articles, e.g. gloves or stockings
The present application provides a preparation method for thermally expandable microspheres containing hydrophilic organic modified colloidal silicon dioxide. The preparation method uses hydrophilic organic modified colloidal silicon dioxide and mixes same with a mixture of a monomer material capable of being polymerized to form a thermoplastic polymer shell and at least one foaming agent to form an emulsion, and the emulsion forms the thermally expandable microspheres by means of polymerization. In the present application, the colloidal silicon dioxide surface-modified with a hydrophilic organic group has good salt tolerance and stability, and is capable of being stable in saline water and facilitating the preparation of the thermally expandable microspheres. The microspheres obtained by preparation have a narrow particle size distribution and may be easily dispersed in both aqueous and organic systems, demonstrating good wetting properties. The invention further relates to thermally expandable microspheres and a use thereof.
The present invention provides a method for controlling aniline impurities that are difficult to treat in waste brine in a DAM production process, the method comprising the following steps: (1) in the presence of an iron-molybdenum catalyst, reacting methanol with fresh air to prepare a formaldehyde-containing reaction gas, cooling same, and then absorbing same with pure water to obtain a raw material – aqueous formaldehyde solution for producing DAM; (2) in the presence of an acid catalyst, carrying out a condensation reaction, a transposition rearrangement reaction and an acid-base neutralization reaction on the prepared aqueous formaldehyde solution and aniline to obtain a brine phase containing a diphenylmethane-based diamine and polyamine and an organic phase; and (3) carrying out extraction and steam stripping treatment on the brine phase to obtain waste brine; and purifying and refining the organic phase to obtain the diphenylmethane-based diamine and polyamine, wherein in step (1), the content of ethanol in the methanol is less than or equal to 100 ppm, the molar ratio of oxygen to alcohol is 0.9-1.3, and the reaction pressure is less than or equal to 1.9 bara. By means of the method of the present invention, the content of aniline impurities that are difficult to treat in waste brine in a DAM production process is reduced to 0.3 ppm or below, so that requirements for a subsequent treatment are satisfied.
C07C 209/78 - Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton from carbonyl compounds, e.g. from formaldehyde, and amines having amino groups bound to carbon atoms of six-membered aromatic rings, with formation of methylene-diarylamines
C07C 209/74 - Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton by halogenation, hydrohalogenation, dehalogenation, or dehydrohalogenation
C07C 211/50 - Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring having at least two amino groups bound to the carbon skeleton with at least two amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
C07C 47/052 - Preparation by oxidation of methanol
C02F 1/26 - Treatment of water, waste water, or sewage by extraction
C02F 1/02 - Treatment of water, waste water, or sewage by heating
C02F 103/36 - Nature of the water, waste water, sewage or sludge to be treated from the chemical industry not provided for in groups from the manufacture of organic compounds
80.
HYDROPHILICALLY MODIFIED POLYISOCYANATE, AND PREPARATION METHOD THEREFOR AND USE THEREOF
Provided in the present invention are a hydrophilically modified polyisocyanate, and a preparation method therefor and the use thereof. On the basis of the method provided in the present invention, the problems of a slow reaction rate, and resulting products having a high turbidity and being dark in color in existing sulfonic-acid modified polyisocyanate preparation processes can be effectively and synchronously ameliorated. The method comprises: reacting materials containing a component (a), a component (b) and an optional component (c) to obtain the hydrophilically modified polyisocyanate, wherein (a) is at least one polyisocyanate, (b) is at least one sulfamic acid, and (c) is at least one tertiary amine; and in the sulfamic acid, particles with a particle size of ≤ 900 meshes are less than 10 wt%, preferably less than 5 wt%, and more preferably less than 3 wt%, and particles with a particle size of > 40 meshes are less than 10 wt%, preferably less than 5 wt%, and more preferably less than 3 wt%.
A polyisocyanate composition, a preparation method therefor and an application thereof. The value of the mass content of alkaline hydrolyzed chlorine minus the mass content of water hydrolyzed chlorine in the polyisocyanate composition is 0.1 ppm-100 ppm. The mass content of the alkaline hydrolyzed chlorine is the mass content obtained by calculating halogen dissociated under alkaline conditions and/or halogen dissociated under a temperature condition of 100° C. or more as the relative atomic mass of a chlorine atom. In the polyisocyanate composition containing a specific amount of alkaline hydrolyzed chlorine, when a reaction locally becomes out of control causing causes a local severe exotherm, chlorine in alkaline hydrolyzed chlorine will be dissociated and be toxic to catalysts, thereby reducing the reactivity in local overreactive areas to thereby avoid the turbidity of a polyurethane synthetic emulsion, such that the light transmittance and yellowing resistance of polyurethane products are further improved.
01 - Chemical and biological materials for industrial, scientific and agricultural use
Goods & Services
(1) Catalysts for use in the manufacture of rubber; catalysts for use in the manufacture of synthetics, rubbers and polymers; chemical preparations for use in the manufacture of paints; chemicals for use in the manufacture of polyurethanes; epoxy resins, unprocessed; ketones; lauryl alcohol; thermoplastic resins, unprocessed; unprocessed artificial resins as raw materials in the form of powders, liquids or pastes
Disclosed herein is a method for efficiently producing formaldehyde-free veneer manufactured boards, comprising steps of: using wood or non-wood veneer as a raw material; controlling the moisture content of the veneer to within an appropriate range; first applying an accelerant and then applying an isocyanate adhesive; then assembling the veneer into a slab according to a certain rule; carrying out microwave preheating on the slab; and feeding the slab into a hot pressing mechanism to obtain aldehyde-free veneer manufactured boards. In the present method, the process for producing aldehyde-free veneer manufactured boards is simple and easy to implement, hot-pressing production efficiency is high, and the mechanical properties of the boards are excellent.
B27D 1/08 - Manufacture of shaped articlesPresses specially designed therefor
C09J 5/02 - Adhesive processes in generalAdhesive processes not provided for elsewhere, e.g. relating to primers involving pretreatment of the surfaces to be joined
C09J 5/06 - Adhesive processes in generalAdhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
84.
STORAGE-STABLE POLYISOCYANATE COMPOSITION AND PREPARATION METHOD THEREFOR
The present invention belongs to the technical field of preparing isocyanate derivatives, and particularly relates to a storage-stable polyisocyanate composition and a preparation method therefor. The method comprises: in the presence of a catalyst system, subjecting an isocyanate monomer to a polymerization reaction; terminating the reaction after a suitable conversion rate is reached, so as to obtain a polyisocyanate reaction solution; and then performing heat treatment on the obtained polyisocyanate reaction solution to obtain a heat-treated polyisocyanate mixture, wherein the heat treatment temperature is 10-30° C. higher than the heat-sensitive temperature of the obtained polyisocyanate product, and the heat treatment time is 5-30 min; and then performing separation treatment on the heat-treated polyisocyanate mixture. When the polyisocyanate composition of the present invention is stored at 50° C. for 30 days, the viscosity increase is small, thus the stability of the viscosity is ensured, and at the same time, the stability of the free monomer content and the color stability are also significantly improved.
Disclosed are a sulfonic acid-modified polyisocyanate and a preparation method thereof. By controlling a content of cyclohexylamine component in the raw material, the reaction rate of sulfamic acid and polyisocyanate is accelerated, so that the prepared product has advantages of light color and low turbidity as well as good storage stability.
C07C 309/26 - Sulfonic acids having sulfo groups bound to carbon atoms of rings other than six-membered aromatic rings of a carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton
C07C 303/22 - Preparation of esters or amides of sulfuric acidsPreparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof from sulfonic acids by reactions not involving the formation of sulfo or halosulfonyl groups
86.
METHOD AND SYSTEM FOR CALIBRATING MECHANICAL PROPERTIES OF MATERIAL TO BE TESTED, AND STORAGE MEDIUM
Disclosed in the present application are a method and system for calibrating the mechanical properties of a material to be tested, and a storage medium, which are used for improving the accuracy of a mechanical property analysis result for a material to be tested. The method comprises: establishing a material card for calibrating the mechanical properties of a material to be tested (S11); according to the material card, establishing a simulation model corresponding to said material (S12); performing benchmarking according to simulation results of the simulation model under different operating conditions and experimental results of said material under corresponding operating conditions (S13); and when the benchmarking result represents that the degrees of fitting between the simulation results and the experimental results under the corresponding operating conditions all reach a preset degree of fitting, determining that the establishment of the material card is completed and the calibration of the mechanical properties of said material is completed (S14). By using the solution provided by the present application, the accuracy of a mechanical property analysis result of a material to be tested is improved.
The present application discloses a preparation method for light-colored vitamin A, comprising: reacting pentadecane phosphonate or pentadecane phosphonium salt with 2-methyl-4-acetoxy-2-butenal and alkali to generate vitamin A, wherein the content of 2-methyl-4-acetoxybutyraldehyde in the 2-methyl-4-acetoxy-2-butenal is not more than 1 wt%. The vitamin A obtained by the preparation method of the present application is light in color and high in yield, and an additional decolorization process does not need to be added.
C07C 67/343 - Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisationPreparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by change of size of the carbon skeleton by increase in the number of carbon atoms
C07C 69/145 - Acetic acid esters of monohydroxylic compounds of unsaturated alcohols
88.
DIMETHYL BENZYL ALCOHOL HYDROGENOLYSIS CATALYST, AND PREPARATION METHOD THEREFOR AND USE THEREOF
2233, thereby facilitating obtaining an efficient hydrogenolysis catalyst which has active components highly dispersed and is reliable in strength and moderate in acidity; the dimethyl benzyl alcohol hydrogenolysis catalyst of the present application has the advantages of being high in active component dispersity, smooth in catalyst pore channel and the like, and has excellent activity and selectivity when being used for preparing cumene by means of dimethyl benzyl alcohol hydrogenolysis.
B01J 23/89 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with noble metals
B01J 35/00 - Catalysts, in general, characterised by their form or physical properties
B01J 35/10 - Solids characterised by their surface properties or porosity
C07C 1/22 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by reduction
Provided in the present application are a PBAT resin composition, and a preparation method therefor and the use thereof. The PBAT resin composition comprises a PBAT resin and a cyclopentalkenylene conjugated-structure compound, wherein the mass content of the cyclopentalkenylene conjugated-structure compound in the PBAT resin composition is 0.05-100 ppm. The PBAT resin composition has a low color value and an excellent color stability while having a relatively high molecular weight and good mechanical properties; and the PBAT resin composition has an excellent hue and can fully meet the requirements of machine shaping such as film blowing, a low haze and a better clearness and transparency are obtained after film blowing, and the appearance and mechanical properties of the product are comprehensively improved. A resin composition containing the PBAT resin composition has good mechanical and physical properties, and can fully meet the use requirements of various film bag products.
The present invention relates to the technical field of the production of polylactic acid, and in particular to a production method for preparing polylactic acid by means of a ring-opening polymerization method, and a prepolymer mixture and the polylactic acid. The production method comprises: (1) enabling an initiator, a catalyst and a monomer I to be in contact in a production device to undergo a ring-opening polymerization reaction, so as to generate a prepolymer mixture containing a polylactic acid prepolymer; and (2) enabling the prepolymer mixture and a monomer II to be in contact with one another to undergo a reaction, so as to generate a high molecular weight polylactic acid. The monomer I and the monomer II are the same or are different, and each independently comprises lactide. The production method provided by the present invention can reduce the fluctuation in the feeding quality of the initiator and the catalyst, and can improve the production stability during the production process.
A reaction system for preparing polymer polyol and a method for preparing polymer polyol. The reaction system comprises a reactor, a first circulation unit, a second circulation unit, and a flow direction switching unit, wherein the reaction cavity of the reactor is divided into a first reaction chamber and a second reaction chamber by a partition plate, and the top of the partition plate is provided with an overflow port to communicate the first reaction chamber and the second reaction chamber with each other; the first circulation unit enables the material in the first reaction chamber to circulate between the discharge port of the first reaction chamber and the feed port of the first reaction chamber; the second circulation unit enables the material in the second reaction chamber to circulate between the discharge port of the second reaction chamber and the feed port of the second reaction chamber. The polymer polyol prepared by the reaction system has a low-viscosity effect, and by using the polymer polyol prepared by the method, a polyurethane foam having excellent mechanical properties and high hardness can be obtained.
C08F 283/06 - Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass on to polyethers, polyoxymethylenes or polyacetals
B01J 19/24 - Stationary reactors without moving elements inside
C08G 18/65 - Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
93.
Storage-stable polyisocyanate composition and preparation method
The present application provides a storage-stable polyisocyanate composition and a preparation method. The polyisocyanate composition is obtained by selecting one or more diisocyanate from aliphatic diisocyanates and alicyclic diisocyanates, and reacting same with an alcohol compound; the polyisocyanate composition contains an isocyanurate group, a uretdione group, a carbamate group, and an allophanate group; within the polyisocyanate composition, the molar ratio of the carbamate group/(uretdione group+isocyanurate group) is 0.01-0.2, and preferably 0.01-0.1. Compared to existing techniques, the present application has the advantage of a noticeable increase in system viscosity of uretdione polyisocyanate during storage. With the present application, by means of controlling the ratio of the carbamate group/(uretdione group+isocyanurate group) within the system, the increase in viscosity of a product during storage is inhibited, thereby improving the storage stability of the product.
C08G 18/28 - Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
The present application relates to a device and method for preparing cumene by the hydrogenolysis of α,α-dimethylbenzyl alcohol. The device comprises a first hydrogenation reactor, a flash separator, a second hydrogenation reactor and a heavy component removal device, which are connected in sequence; a raw material inlet of the first hydrogenation reactor is provided with an organic acid adding device, and a reactant outlet of the first hydrogenation reactor is provided with the flash separator; a liquid phase product obtained from the flash separator flows into the second hydrogenation reactor. The described method is carried out in the device. In the present application, by mixing a raw material containing α,α-dimethylbenzyl alcohol with an organic acid, the acidity of the reaction system of a first hydrogenation reaction is increased such that the first hydrogenation reaction can be carried out at a lower temperature, which reduces the single-use consumption of cumene, and also prevents the problem of increased by-products caused by a rise in temperature.
C07C 1/22 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by reduction
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
C07C 1/20 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms
The present application relates to a C15 phosphonium salt isomer, a preparation method therefor, and an application thereof. The C15 phosphonium salt isomer has a structure as shown in formula I, wherein X is selected from halogen atoms or sulfite radicals. According to the present application, the C15 phosphonium salt isomer is matched with C15 phosphonium salt to form vitamin A acetate having high selectivity, low impurity content, and high crystallization yield.
C07C 403/12 - Derivatives of cyclohexane or of a cyclohexene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene rings, e.g. vitamin A, beta-carotene, beta-ionone having side-chains substituted by singly-bound oxygen atoms by esterified hydroxy groups
Disclosed herein are a polymer composite, a preparation method therefor and an application thereof. The polymer composite comprises the following components in parts by weight: 100 parts polymer powder, 0.1-3 parts nanoparticle A, and 0.05-1.5 parts nanoparticle B. The particle size of nanoparticle A is smaller than that of nanoparticle B, and the mass ratio of nanoparticle A to nanoparticle B is (1-9):1. The small-particle size and large-particle size nanoparticles used in the present application are compounded in a specific ratio, and the two act synergistically as flow agents for the polymer powder, so that the polymer composite has excellent fluidity, permeability and high temperature stability.
C08L 23/00 - Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bondCompositions of derivatives of such polymers
C08L 33/10 - Homopolymers or copolymers of methacrylic acid esters
C08L 25/04 - Homopolymers or copolymers of styrene
C08L 69/00 - Compositions of polycarbonatesCompositions of derivatives of polycarbonates
C08L 77/00 - Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chainCompositions of derivatives of such polymers
A preparation method for optically active citronellal, which can obviously enhance the catalytic stability of an optically active transition metal catalyst for asymmetric hydrogenation of homogeneous catalysis and thereby achieve higher turnover numbers. In the preparation method for optically active citronellal, a substrate is subjected to an asymmetric hydrogenation reaction in the presence of the transition metal catalyst to generate the optically active citronellal, wherein the transition metal catalyst is obtained by reacting a transition metal compound with an optically active ligand containing two phosphorus atoms, and the raw material of the substrate is one of neral and geranial or a combination thereof to control the hydroxyl value to be less than or equal to 6 mgKOH/g and/or the iron content to be less than or equal to 50 ppm in the raw material of the substrate for the asymmetric hydrogenation reaction.
C07C 45/62 - Preparation of compounds having C=O groups bound only to carbon or hydrogen atomsPreparation of chelates of such compounds by reactions not involving the formation of C=O groups by hydrogenation of carbon-to-carbon double or triple bonds
B01J 31/28 - Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups of the platinum group metals, iron group metals or copper
C07C 45/82 - SeparationPurificationStabilisationUse of additives by change in the physical state, e.g. crystallisation by distillation
99.
ABS RUBBER POWDER WITH LOW IMPURITY CONTENT, PREPARATION METHOD THEREFOR, AND ABS RESIN
Disclosed in the present invention are ABS rubber powder with a low impurity content, a preparation method therefor, and an ABS resin. The ABS rubber powder is treated by using the following steps: washing the ABS rubber powder with a washing solution I, and monitoring the content of soluble organic carbon in the ABS rubber powder until the content of soluble organic carbon in the ABS rubber powder is less than or equal to 9000 ppm, so as to obtain the ABS rubber powder with the low impurity content. In the present invention, by controlling the content of soluble organic carbon or the contents of soluble organic carbon and iron ions in the ABS powder, the ABS resin with a low yellow index of less than or equal to 18 is obtained.
Disclosed are a preparation method for and an application of lactic acid. The preparation method for lactic acid comprises the following steps: (1) inoculating a lactic acid-producing strain, after being activated, into a seed culture medium for culture to obtain a seed solution; and (2) mixing the seed solution obtained by step (1) with supplemental glucose, a fermentation culture medium, a trace element and amino acid for fermentation to obtain lactic acid. According to the preparation method for lactic acid provided in the present application, the operation steps are simple, the purity of the lactic acid is high, and the content of a byproduct 2-hydroxy acid-based compound is low.
