Abstract

The present invention relates to a polylactic acid 3D printing material and a preparation method therefor, which belong to the technical field of polymer materials. The polylactic acid 3D printing material of the present invention comprises the following preparation raw materials in parts by weight: (a) 40-95 parts of crystalline or semi-crystalline polylactic acid, (b) 5-60 parts of non-crystalline polylactic acid, and (c) 0-1.0 parts of a processing aid. In the polylactic acid 3D printing material, the weight of dextral polylactic acid represents 0.5%-8% of the total weight of the polylactic acid. According to the present invention, by selecting and using two polylactic acids with different optical purities as raw materials, rationally adjusting the proportional relationship of the two, and defining the content of the dextral polylactic acid, a polylactic acid 3D printing material with a good ageing resistance property can be prepared. Studies show that the viscosity retention rate of the polylactic acid 3D printing material of the present invention reaches more than 70% after storage in a constant-temperature and -humidity chamber (at a temperature at 60ºC and a humidity of 60%) for 12 days.

IPC Classes  ?

• C08L 67/04 - Polyesters derived from hydroxy carboxylic acids, e.g. lactones
• C08K 5/20 - Carboxylic acid amides
• C08K 5/098 - Metal salts of carboxylic acids

Abstract

A polylactic acid 3D printing material and a wire prepared therefrom. The polylactic acid 3D printing material comprises the following components: (a) 98.0-100 parts of polylactic acid; and (b) 0-2.0 parts of a processing aid, the number average molecular weight Mn of the polylactic acid being 50,000-150,000 on the basis of the total weight of the entire polylactic acid. The structure of the polylactic acid 3D printing material satisfies the following relationship: 0.8 ≤ Mx / Dx ≤ 7, where Dx represents a polydispersity coefficient defined as Mw / Mn, where Mw is the weight average molecular weight of the polylactic acid 3D printing material, Mn is the number average molecular weight of the polylactic acid 3D printing material, and Mx represents a melt flow rate of the polylactic acid 3D printing material at a temperature of 190°C under a load of 2.16 kg. When the structure satisfies the above relationship, the polylactic acid 3D printing material has a wire diameter range of ≤ 0.12 cm and a wire diameter relative deviation of < 5% when a pulling extrusion speed is 45 Kg/h and an extruded wire diameter is 1.75 cm, thereby exhibiting excellent wire extrusion stability.

IPC Classes  ?

• C08L 67/04 - Polyesters derived from hydroxy carboxylic acids, e.g. lactones
• D01F 6/92 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
• B33Y 70/00 - Materials specially adapted for additive manufacturing

Abstract

The present invention discloses a polylactic acid 3D printing material and a wire prepared therefrom. The polylactic acid 3D printing material comprises the following components: (a) 98.0-100 parts of polylactic acid; and (b) 0-2.0 parts of a processing aid, the weight content of a dextroisomer of the polylactic acid is 0.3%-5% on the basis of the total weight of the entire polylactic acid. The structure of the polylactic acid 3D printing material satisfies the following relationship: 0°C ≤ Tx-Ty ≤ 60°C, where Tx is a maximum weight loss rate temperature of the polylactic acid 3D printing material, and Ty is an extrapolated initial decomposition temperature of the polylactic acid 3D printing material. The present invention discovered through research that when the structure of the polylactic acid 3D printing material satisfies the following relationship: 0°C ≤ Tx-Ty ≤ 60°C, the polylactic acid 3D printing material has a wire diameter range of ≤ 0.12 cm and a wire diameter relative deviation of < 5% when a pulling extrusion speed is 45 Kg/h and an extruded wire diameter is 1.75 cm, thereby exhibiting excellent wire extrusion stability.

IPC Classes  ?

• C08L 67/04 - Polyesters derived from hydroxy carboxylic acids, e.g. lactones
• C08L 83/04 - Polysiloxanes
• C08K 5/20 - Carboxylic acid amides
• B33Y 70/00 - Materials specially adapted for additive manufacturing

Abstract

The present invention involves a biodegradable polyester and the use thereof, said biodegradable polyester comprising: A) an acid component comprising the following repeating units: 50-58mol% of terephthalic acid A1; 30-40mol% of sebacic acid A2; and 2-20 mol% of aliphatic dibasic acid A3 having a carbon chain length with less than or equal to 6; and B) a butanediol. According to the present invention, the material toughness can be improved by introducing the aliphatic dibasic acid monomer having a carbon chain length with less than or equal to 6 carbons when it shows a high content of terephthalic acid, and by using the biodegradable polyester obtained when it meets the degradation capacity and rigidity requirements.

IPC Classes  ?

• C08G 63/183 - Terephthalic acids
• C08G 63/16 - Dicarboxylic acids and dihydroxy compounds

Abstract

t=30t=0t=30t=0t=0 < 5.1 after the polylactic acid composite material is tested at the temperature of 60°C under the humidity of 60% for 30 days when the content of the terminal carboxyl group of the polylactic acid composite material is controlled to range from 12 molKOH/t to 51 molKOH/t, proving that the product is slow in aging degradation under the testing conditions, and the polylactic acid composite material has a biodegradation rate higher than 90% after 12 weeks under the condition that the thickness is smaller than or equal to 2.5 mm. The polylactic acid composite material has proper aging performance and excellent biodegradation performance.

IPC Classes  ?

• C08L 67/04 - Polyesters derived from hydroxy carboxylic acids, e.g. lactones
• C08K 3/34 - Silicon-containing compounds
• C08K 5/098 - Metal salts of carboxylic acids
• C08K 5/06 - EthersAcetalsKetalsOrtho-esters
• C08G 63/08 - Lactones or lactides

Abstract

Disclosed are a biodegradable polyester and the use thereof, said biodegradable polyester comprising: A) an acid component comprising the following repeating units: 40-48 mol% of terephthalic acid A1; 38.5-50 mol% of sebacic acid A2; and 2-20 mol% of aliphatic dibasic acid A3 having a carbon chain length with less than or equal to 6 carbons; and B) a butanediol. With a low content of terephthalic acid, the introduction of the aliphatic dibasic acid monomer having a carbon chain length with less than or equal to 6 carbons sensibly improves the mechanical property of the material, specifically, when storing the material in a humid environment so as to maintain the good mechanical property retention rate.

IPC Classes  ?

• C08G 63/183 - Terephthalic acids
• C08G 63/78 - Preparation processes
• C08J 5/18 - Manufacture of films or sheets

Abstract

Disclosed is a polypropylene composition, comprising: 60-85 parts by weight of polypropylene resin, 5-10 parts by weight of high-density polyethylene resin, 5-20 parts by weight of a POE complex formulation flexibilizer, 1-5 parts by weight of graphene, and 3-5 parts by weight of a surface modifier. The POE complex formulation flexibilizer adopted by the present invention maintains the good impact performance of a material while increasing the chemical corrosion-resistant performance thereof; the added surface modifier can reduce the erosion of chemicals to the surface of the material; the added graphene not only increases the intensity of the material, but also has an inhibition effect on chemical corrosion, and moreover, the added graphene enables the material to have a unique metal luster and can conceal defects such as fiddle back figures of an injection molding product. The synergism of the POE complex formulation flexibilizer, the surface modifier, and the graphene makes the polypropylene material composition have excellent chemical-resistant performance, maintain good rigid-tough balance, have good appearance, and be capable of being applied to interior and exterior decoration products of an automobile.

IPC Classes  ?

• C08L 23/12 - Polypropene
• C08L 23/06 - Polyethene
• C08L 23/08 - Copolymers of ethene
• C08L 53/00 - Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers
• C08L 27/18 - Homopolymers or copolymers of tetrafluoroethene
• C08L 71/00 - Compositions of polyethers obtained by reactions forming an ether link in the main chainCompositions of derivatives of such polymers
• C08L 83/08 - Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
• C08K 13/02 - Organic and inorganic ingredients
• C08K 3/04 - Carbon
• C08K 5/134 - Phenols containing ester groups
• C08K 5/526 - Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds

Abstract

A polypropylene composition, comprising 60-85 parts by weight of polypropylene resin, 5-10 parts by weight of high-density polyethylene resin, 5-20 parts by weight of a dendritic flexibilizer, 1-5 parts by weight of graphene, and 3-5 parts by weight of a surface modifier. By adoption of the dendritic flexibilizer, the good impact performance of a material can be maintained under the condition of lower dosage, and moreover, the chemical-resistance performance of the polypropylene material is facilitated to be improved; the added surface modifier changes the surface tension of the material, and can effectively reduce the erosion of chemicals to the surface of the material; the added graphene not only improves the bending modulus of the material, but also has a nano-blocking effect on the chemicals, thereby inhibiting the erosion of the chemicals. By means of the synergism of the dendritic flexibilizer, the surface modifier, and the graphene, the obtained polypropylene material composition has excellent chemical-resistance performance, and maintains good rigid-tough balance. In addition, the obtained polypropylene material has no defects such as fiddle back figures after injection molding, and has special metal luster.

IPC Classes  ?

• C08L 23/10 - Homopolymers or copolymers of propene
• C08L 23/06 - Polyethene
• C08L 101/00 - Compositions of unspecified macromolecular compounds
• C08L 71/00 - Compositions of polyethers obtained by reactions forming an ether link in the main chainCompositions of derivatives of such polymers
• C08L 27/18 - Homopolymers or copolymers of tetrafluoroethene
• C08L 83/08 - Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
• C08K 13/02 - Organic and inorganic ingredients
• C08K 3/04 - Carbon
• C08K 5/134 - Phenols containing ester groups
• C08K 5/526 - Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds

Abstract

Disclosed in the present invention are a polypropylene composition having low surface temperature, a preparation method therefor, and uses thereof. The polypropylene composition having low surface temperature comprises components of: 47-85 parts of polypropylene resin and 5-20 parts of elastomer; and the polypropylene composition having low surface temperature comprises 1000 ppm-4000 ppm of a pigment which is selected from one of or a mixture of rutile-type pigments, spinel-type pigments, or hematite-type pigments. The preparation method for the polypropylene composition comprise: uniformly mixing the polypropylene resin, the pigment, and the elastomer; feeding into a twin-screw extruder to be melted and mixed; and then performing extruding and granulating to obtain the polypropylene composition having low surface temperature of the present invention. The polypropylene composition having low surface temperature of the present invention has a higher near-infrared reflectivity; and after the polypropylene composition and other polypropylene compositions on the market are irradiated with near-infrared rays of the same frequency for a certain period of time, the surface temperature of the propylene composition of the present invention is found to be significantly lower. The polypropylene composition of the present invention can be widely used in dashboards, sub-dashboards, door panels, seats, or bumpers.

IPC Classes  ?

• C08L 23/12 - Polypropene
• C08L 23/08 - Copolymers of ethene
• C08K 13/02 - Organic and inorganic ingredients
• C08K 3/22 - OxidesHydroxides of metals

Abstract

Disclosed are a rubber-toughened polypropylene composite and the use thereof. The composite comprises the following components: 45 parts - 69 parts of polypropylene; 15 parts - 25 parts of talc powder; 15 parts - 25 parts of an elastomer; and 1 part - 5 parts of a lubricant, wherein the lubricant is a compound of an internal lubricant and an external lubricant; and the mass ratio of the internal lubricant to the external lubricant is 1 : 4 to 4 : 1. In the present invention, the compound of an internal lubricant and an external lubricant is used in the polypropylene/talc powder/elastomer formulation system, and the compound proportion of the two is controlled to be within a certain range, such that the surface tension of the elastomer and the polypropylene is decreased during blending so as to effectively reduce the average particle size of the elastomer in a polypropylene matrix and promote the good dispersion of the elastomer in the polypropylene matrix, thereby greatly improving the rigidity of the material while ensuring that the material has excellent normal-temperature and low-temperature impact properties, avoiding the problem of a significant decrease in the rigidity of the material, and meeting the need for the development of automobile interior decorating materials.

IPC Classes  ?

• C08L 23/12 - Polypropene
• C08L 23/08 - Copolymers of ethene
• C08L 23/06 - Polyethene
• C08K 13/02 - Organic and inorganic ingredients
• C08K 3/34 - Silicon-containing compounds
• C08K 5/134 - Phenols containing ester groups
• C08K 5/20 - Carboxylic acid amides
• C08K 5/098 - Metal salts of carboxylic acids

Abstract

Disclosed is a thermochromic polypropylene composite, comprising the following components in terms of parts by weight: a polypropylene resin 95-99 parts and a thermochromic microcapsule 0.5-3 parts. The core material of the thermochromic microcapsule is a triphenylmethane metal complex, the wall material of the thermochromic microcapsule is formed by polymerizing formaldehyde and melamine, and the molar ratio of formaldehyde/melamine is 2.5/1-3/1. First, melamine and formaldehyde undergo an addition reaction in an environment of pH 7.5-8.5 to produce a hydroxymethyl melamine prepolymer, then the triphenylmethane metal complex is dispersed in a sodium dodecyl sulfate aqueous solution of 0.2-1.0 wt% concentration, finally the hydroxymethyl melamine prepolymer is added to the described solution, the solution is regulated to a pH of 5.5-6.5 to produce a microcapsule emulsion, which is reacted at 80-90 °C for 3 h, rinsed, suction filtered, and dried to produce the thermochromic microcapsule. The thermochromic polypropylene composite has great long-term heat resistance, is widely applicable in the instrument panel, auxiliary instrument panel, seats, door panels, bumpers or columns of a vehicle.

IPC Classes  ?

• C08L 23/14 - Copolymers of propene
• C08K 9/10 - Encapsulated ingredients
• C08K 5/00 - Use of organic ingredients

Abstract

Disclosed is a photochromic polypropylene composite, comprising the following components in terms of parts by weight: a polypropylene resin 96.5-98.5 parts and a photochromic microcapsule 0.5-2.5 parts. The core material of the photochromic microcapsule is a spiropyran, the wall material is a melamine formaldehyde resin, the wall material is formed by polymerizing formaldehyde and melamine, and the molar ratio of formaldehyde/melamine is 2.5/1-3/1. First, melamine and formaldehyde undergo an addition reaction in an environment of pH 7.5-8.5 to produce a hydroxymethyl melamine prepolymer, then a photochromic material spiropyran compound is dispersed in sodium dodecyl sulfate aqueous solution of a concentration of 0.2-1.0 wt%, then the hydroxymethyl melamine prepolymer is added to the solution, and the solution is regulated to a pH of 5.5-6.5 to produce a microcapsule emulsion, which is reacted at 80-90 °C for 3 h, rinsed, suction-filtered, and dried to produce the photochromic microcapsule. The photochromic polypropylene composite is capable of withstanding long-term exposure to sunlight, steadily changes colors back and forth, has great long-term weather resistance, and is widely applicable in interior and exterior decorative accessories for a vehicle.

IPC Classes  ?

• C08L 23/14 - Copolymers of propene
• C08K 9/10 - Encapsulated ingredients
• C08K 5/3417 - Five-membered rings condensed with carbocyclic rings
• C08G 12/32 - Melamines

Abstract

Disclosed are a PC/ABS composition, a preparation method therefor and the use thereof. The composition comprises the components of: 60-70 parts of a polycarbonate resin; 30-40 parts of an acrylonitrile-butadiene-styrene copolymer; and 0.5-5 parts of a compatilizer, wherein the polycarbonate resin is a bisphenol A-type polycarbonate having a melt mass flow rate (MFR) of 8 g/10 min to 10 g/10 min at 300ºC under a load of 5 kg; and the acrylonitrile-butadiene-styrene resin has a melt mass flow rate (MFR) of 15 g/10 min to 20 g/10 min at 220ºC under a load of 10 kg. In the present invention, a nanoscale bicontinuous phase structure can be obtained by selecting and controlling the PC/ABS ratio and matching the viscosities of PC and ABS, the high-speed impact resistance of a material can be effectively improved, multi-axis impact is presented as a ductile fracture, the safety of use is improved, and the prepared PC/ABS composition has a good toughness and safety during high-speed impact while ensuring the rigidity of the material, and can be widely applied to the preparation of interior automobile parts.

IPC Classes  ?

• C08L 69/00 - Compositions of polycarbonatesCompositions of derivatives of polycarbonates
• C08L 55/02 - ABS [Acrylonitrile-Butadiene-Styrene] polymers

Abstract

Disclosed are a polycarbonate composition and a preparation method therefor. The polycarbonate composition comprises the following components in part by weight: 35-75 parts of polycarbonate, 0-30 parts of grafted copolymer, 5-25 parts of flame retardant, and 10-50 parts of mineral filler, wherein based on the total weight of the polycarbonate composition, the weight content of titanium element is 1-40 ppm. According to the present invention, the content of titanium element in the polycarbonate composition can be controlled in the range of 1-40 ppm by adding a titanium-containing compound having lower soluble titanium content in the polycarbonate composition and reducing or avoiding addition of other titanium-containing compounds, so that the prepared polycarbonate composition has the wet and heat ageing resistance performance retention rate greater than 70% after being roasted for 500 h at 90°C in 90% humidity, has significantly improved wet and heat ageing resistance performance and better surface quality, and maintains excellent mechanical performance.

IPC Classes  ?

• C08L 69/00 - Compositions of polycarbonatesCompositions of derivatives of polycarbonates
• C08L 55/02 - ABS [Acrylonitrile-Butadiene-Styrene] polymers
• C08L 51/04 - Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers grafted on to rubbers
• C08K 13/02 - Organic and inorganic ingredients
• C08K 5/523 - Esters of phosphoric acids, e.g. of H3PO4 with hydroxyaryl compounds
• C08K 3/34 - Silicon-containing compounds
• C08K 5/10 - EstersEther-esters
• C08K 3/22 - OxidesHydroxides of metals

Abstract

Disclosed are a polycarbonate composition and a preparation method therefor. The polycarbonate composition comprises the following components in part by weight: 40-75 parts of polycarbonate, 0-35 parts of grafted copolymer, 5-30 parts of flame retardant, and 8-45 parts of mineral filler, wherein based on the total weight of the polycarbonate composition, the weight content of zinc element is 0.1-20 ppm. According to the present invention, the content of zinc element in the polycarbonate composition can be controlled in the range of 0.1-20 ppm by adding a zinc-containing compound having lower soluble zinc content in the polycarbonate composition and reducing or avoiding addition of other zinc-containing compounds, so that the prepared polycarbonate composition ages for 500 h at 80°C, the thermo-oxidative ageing MI increase rate is less than 30%, and the thermo-oxidative stability is significantly improved.

IPC Classes  ?

• C08L 69/00 - Compositions of polycarbonatesCompositions of derivatives of polycarbonates
• C08K 5/523 - Esters of phosphoric acids, e.g. of H3PO4 with hydroxyaryl compounds

Abstract

Provided is a polycarbonate composition, comprising the following components in parts by weight: 35-85 parts of polycarbonate; 0-40 parts of graft copolymer; 5-30 parts of fire retardant; 5-40 parts of mineral filler; on the basis of the total weight of the polycarbonate composition, the weight content of elemental chromium is 10-200 ppm. By means of adding to the polycarbonate composition a chromium-containing compound having a low chromium content and reducing or avoiding the addition of other chromium-containing compounds, and controlling to within a range of 10-200 ppm the content of elemental chromium in the polycarbonate composition, the resulting polycarbonate composition has a higher forming toughness and thermo-oxidative stability is significantly improved.

IPC Classes  ?

• C08L 69/00 - Compositions of polycarbonatesCompositions of derivatives of polycarbonates
• C08K 13/02 - Organic and inorganic ingredients
• C08K 3/16 - Halogen-containing compounds
• C08K 3/10 - Metal compounds
• C08L 55/02 - ABS [Acrylonitrile-Butadiene-Styrene] polymers
• C08L 51/04 - Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers grafted on to rubbers
• C08L 91/06 - Waxes
• C08L 27/18 - Homopolymers or copolymers of tetrafluoroethene
• C08K 5/42 - Sulfonic acidsDerivatives thereof

Abstract

Provided are a polycarbonate composition and method for preparing same, said composition comprising the following components in parts by weight: 30-80 parts of polycarbonate; 0-50 parts of graft copolymer; 1-30 parts of fire retardant; 1-50 parts of mineral filler; on the basis of the total weight of the polycarbonate composition, the weight content of elemental calcium is 50-300 ppm. By means of adding to the polycarbonate composition a calcium-containing compound having a low calcium content and reducing or avoiding the addition of other calcium-containing compounds, and controlling to within a range of 50-300 ppm the content of elemental calcium in the polycarbonate composition, the resulting polycarbonate composition not only has a higher impact strength and better processing fluidity, meeting various processing requirements for forming workpieces, but also has a higher glossiness, thus the surface quality of the polycarbonate composition is significantly improved.

IPC Classes  ?

• C08L 69/00 - Compositions of polycarbonatesCompositions of derivatives of polycarbonates
• C08K 13/02 - Organic and inorganic ingredients
• C08K 3/16 - Halogen-containing compounds
• C08K 3/10 - Metal compounds
• C08L 55/02 - ABS [Acrylonitrile-Butadiene-Styrene] polymers
• C08L 51/04 - Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers grafted on to rubbers
• C08K 5/42 - Sulfonic acidsDerivatives thereof

Abstract

Disclosed are a polycarbonate composition and method for preparing same, said composition comprising the following components in parts by weight: 35-70 parts of polycarbonate; 0-45 parts of graft copolymer; 8-30 parts of fire retardant; 5-45 parts of mineral filler; on the basis of the total weight of the polycarbonate composition, the weight content of elemental nickel is 1-100 ppm. In the present invention, by means of adding to the polycarbonate composition a nickel-containing compound having a low nickel content and reducing or avoiding the addition of other nickel-containing compounds, and controlling to within a range of 1-100 ppm the content of elemental nickel in the polycarbonate composition, the resulting polycarbonate composition, after being baked at 85°C for 200 h, has a chromatic aberration value of less than 8, a color level of 3 or higher, and excellent chromatic stability.

IPC Classes  ?

• C08L 69/00 - Compositions of polycarbonatesCompositions of derivatives of polycarbonates
• C08L 55/02 - ABS [Acrylonitrile-Butadiene-Styrene] polymers
• C08L 51/04 - Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers grafted on to rubbers
• C08L 27/18 - Homopolymers or copolymers of tetrafluoroethene
• C08K 13/02 - Organic and inorganic ingredients
• C08K 3/22 - OxidesHydroxides of metals
• C08K 3/30 - Sulfur-, selenium-, or tellurium-containing compounds
• C08K 3/28 - Nitrogen-containing compounds
• C08K 3/16 - Halogen-containing compounds

Abstract

Disclosed are a polycarbonate composition and method for preparing same, said composition comprising the following components in parts by weight: 30-75 parts of polycarbonate; 0-35 parts of graft copolymer; 5-25 parts of fire retardant; 5-35 parts of mineral filler; on the basis of the total weight of the polycarbonate composition, the weight content of elemental potassium is 10-200 ppm. In the present invention, by means of adding to the polycarbonate composition a potassium-containing compound having a low potassium content and reducing or avoiding the addition of other potassium-containing compounds, and controlling to within a range of 10-200 ppm the content of elemental potassium in the polycarbonate composition, the resulting polycarbonate composition, after being baked at 90°C and 90% humidity for 500 h, has a resistance to heat and moisture aging that remains greater than 70%; it has significantly improved resistance to heat and moisture aging, and has a chromatic aberration value of less than 8 after being baked at 85°C for 200 h, has a color level of 3 or higher, and has excellent chromatic stability.

IPC Classes  ?

• C08L 69/00 - Compositions of polycarbonatesCompositions of derivatives of polycarbonates
• C08K 5/523 - Esters of phosphoric acids, e.g. of H3PO4 with hydroxyaryl compounds

Abstract

The present invention discloses a polylactic acid 3D printing wire rod and a preparation method therefor. The polylactic acid 3D printing wire rod comprises the following components: (a) 99.0 to 100 parts of polylactic acid; and (b) 0 to 1.0 parts of a lubricant. The structure of the polylactic acid 3D printing wire rod satisfies the following relations: 365°C ≤ Tx ≤ 385°C and 80°C ≤ Tm - Tg ≤ 115°C, wherein Tm is a melting point, Tg is a glass transition temperature, and Tx is a temperature at a maximum mass loss rate. It was found by research according to the present invention that when the structure of the polylactic acid 3D printing wire rod satisfies the following: 365°C ≤ Tx ≤ 385 °C and 80°C ≤ Tm - Tg ≤ 115°C, the polylactic acid 3D printing wire rod has a wire rod diameter of ≤ 0.12 cm and a relative wire rod diameter deviation of < 5% at a wire rod extrusion speed of 40 Kg/h and an extruded wire rod diameter of 1.75 cm, thereby exhibiting a good wire rod extrusion stability.

IPC Classes  ?

• C08L 67/04 - Polyesters derived from hydroxy carboxylic acids, e.g. lactones
• C08L 83/04 - Polysiloxanes
• C08K 5/20 - Carboxylic acid amides
• B29C 47/00 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor (extrusion blow-moulding B29C 49/04)
• B33Y 70/00 - Materials specially adapted for additive manufacturing

Abstract

The present invention discloses a glass fiber-reinforced, halogen-free, and flame-retardant polypropylene material and a preparation method and an application of the same. The material of the present invention is prepared from the following components in parts by weight: 20-50 parts of polypropylene, 5-30 parts of a phosphorus-nitrogen halogen-free intumescent flame retardant, and 30-50 parts of glass fibers, wherein the content of elemental calcium is 50-660 ppm, preferably 130-300 ppm, and more preferably 180-250 ppm based on the total weight of the glass fiber-reinforced, halogen-free, and flame-retardant polypropylene material. It was found unexpectedly that by controlling the content of elemental calcium in the polypropylene material to within a range of 50-660 ppm by adding a trace amount of elemental calcium to the glass fiber-reinforced, halogen-free, and flame-retardant polypropylene material, the polypropylene material had notably improved flame retardance and smoke suppression functions, excellent weather resistance, desirable heat resistance, water resistance, and corrosion resistance, and other features, and is thus a highly suitable plastic material for engineering plastic building templates. The glass fiber-reinforced, halogen-free, and flame-retardant polypropylene material according to the present invention can be widely applied in plastic building templates, and has high application value and a broad application prospect.

IPC Classes  ?

• C08L 23/12 - Polypropene
• C08L 23/08 - Copolymers of ethene
• C08L 27/18 - Homopolymers or copolymers of tetrafluoroethene
• C08L 83/04 - Polysiloxanes
• C08K 13/04 - Ingredients characterised by their shape and organic or inorganic ingredients
• C08K 7/14 - Glass
• C08K 5/098 - Metal salts of carboxylic acids
• C08K 5/3492 - Triazines
• C08K 3/22 - OxidesHydroxides of metals
• C08K 3/26 - CarbonatesBicarbonates

Abstract

A polyester resin and a preparation method therefor. The structure of the polyester resin satisfies the following relation formula: Sδ(hydrogen on conjugated carbon chain)/Sδ(hydrogen on saturated carbon chain 1.2-2.4)=0.1-0.35, where the Sδ(hydrogen on conjugated carbon chain) is the total area of peak integral of hydrogen on the conjugated carbon chain in a 1H NMR spectrogram, and the Sδ(hydrogen on saturated carbon chain 1.2-2.4) is the total area of peak integral of hydrogen on the saturated carbon chain in the 1H NMR spectrogram with the chemical shift of 1.2-2.4 ppm. When the polyester resin is prepared into a thin film with the thickness of 25±1 µm, the water vapor permeability of the thin film is 100-1,500 g/m2/d, and the moisture permeation property is good.

IPC Classes  ?

• C08G 63/183 - Terephthalic acids
• C08G 63/58 - Cyclic ethersCyclic carbonatesCyclic sulfites
• C08G 63/52 - Polycarboxylic acids or polyhydroxy compounds in which at least one of the two components contains aliphatic unsaturation
• C08G 63/85 - Germanium, tin, lead, arsenic, antimony, bismuth, titanium, zirconium, hafnium, vanadium, niobium, tantalum, or compounds thereof

Abstract

A PBAT resin and a preparation method therefor. The structure of the PBAT resin satisfies the following relation formula: Sδ(hydrogen on conjugated carbon chain)/Sδ(hydrogen on saturated carbon chain 1.2-2.4)=0.1-0.35, where the Sδ(hydrogen on conjugated carbon chain) is the total area of peak integral of hydrogen on the conjugated carbon chain in a 1H NMR spectrogram, and the Sδ(hydrogen on saturated carbon chain 1.2-2.4) is the total area of peak integral of hydrogen on the saturated carbon chain in the 1H NMR spectrogram with the chemical shift of 1.2-2.4 ppm. When the PBAT resin is prepared into a thin film with the thickness of 25±1 µm, the water vapor permeability of the thin film is 100-1,500 g/m2/d.

IPC Classes  ?

• C08G 63/183 - Terephthalic acids
• C08G 63/78 - Preparation processes

Abstract

Disclosed are a liquid crystal polyester molded composition and application thereof. The composition comprises the following components: 30-100 parts of liquid crystal polyester, 0-30 parts of other thermoplastic polymers, and 0-70 parts of reinforcing filler. On the basis of the total weight of the liquid crystal polyester molded composition, the weight content of fluorine is 50-2,000 ppm, and the weight content of magnesium is 0.1-500 ppm. According to the present invention, the content of fluorine in the liquid crystal polyester molded composition is controlled within the range of 50-2,000 ppm, and the content of magnesium is controlled within the range of 0.1-500 ppm, thereby effectively improving the autologous fiber ability of the liquid crystal polyester. Moreover, induced autologous fiber arrangement of fluorine has the directional disorder characteristic. Synergistic combination of the two elements can significantly reduce the difference of thermal expansion in vertical and horizontal directions while enabling the liquid crystal polyester molded composition to have excellent rigidity. Therefore, workpieces prepared from the liquid crystal polyester molded composition as the material of an exhaust blade are thin in wall, light in weight and low in noise, can significantly improve usage stability of the exhaust blade, prolong the service life in severe environment, and are not liable to wear, age or deform.

IPC Classes  ?

• C08L 67/00 - Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chainCompositions of derivatives of such polymers
• C08L 51/06 - Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
• C08L 27/18 - Homopolymers or copolymers of tetrafluoroethene
• C08L 81/02 - PolythioethersPolythioether-ethers
• C08L 69/00 - Compositions of polycarbonatesCompositions of derivatives of polycarbonates
• C08K 7/14 - Glass
• C08K 3/16 - Halogen-containing compounds

Abstract

A polyester terephthalate-co-sebate resin and a preparation method therefor. The structure of the polyester terephthalate-co-sebate resin satisfies the following relation formula: Sδ(hydrogen on conjugated carbon chain)/Sδ(hydrogen on saturated carbon chain 1.2-2.4)=0.1-0.35, where the Sδ(hydrogen on conjugated carbon chain) is the total area of peak integral of hydrogen on the conjugated carbon chain in a 1H NMR spectrogram, and the Sδ(hydrogen on saturated carbon chain 1.2-2.4) is the total area of peak integral of hydrogen on the saturated carbon chain in the 1H NMR spectrogram with the chemical shift of 1.2-2.4 ppm. When the polyester terephthalate-co-sebate resin is prepared into a thin film with the thickness of 25±1 µm, the water vapor permeability of the thin film is 100-1,500 g/m2/d, and the moisture permeation property is good.

IPC Classes  ?

• C08G 63/183 - Terephthalic acids
• C08G 63/78 - Preparation processes

Abstract

Disclosed are a biodegradable polyester thin film and a preparation method therefor. The biodegradable polyester thin film comprises the following components: (a) 20-50 parts of polylactic acid; (b) 50-80 parts of polybutylene adipate/terephthalate, wherein the light transmittance of the biodegradable polyester thin film is 80-90 percent when the film thickness is 20-35 μm. As the polybutylene adipate/terephthalate and the polylactic acid are blended and modified, and the light transmittance of the polyester thin film is controlled to be within 80-90 percent, the problems of the film material of the polyester thin film lacking uniformity of longitudinal and transverse tearing strength and having poor transparency when the polyester thin film is used can be effectively improved. The thin film thus prepared has high film stiffness and uniformity of longitudinal and transverse tearing strength.

IPC Classes  ?

• C08L 67/02 - Polyesters derived from dicarboxylic acids and dihydroxy compounds
• C08L 67/04 - Polyesters derived from hydroxy carboxylic acids, e.g. lactones
• C08K 3/34 - Silicon-containing compounds
• C08K 3/26 - CarbonatesBicarbonates
• C08J 5/18 - Manufacture of films or sheets

Abstract

The present invention provides a modified resin composition used for depositing metal thin film, a method for preparing said modified resin composition, and an application for said modified resin composition. Said modified resin composition comprises a resin base and a metal oxide solid solution; the metal elements in the solvent of the metal oxide solid solution are elements which come from periods 3, 4, 5, and 6 of the periodic table; the metal elements in the solute are elements which come from periods 3, 4, 5, and 6 of the periodic table; the weight content ratio of solute to solvent in the metal oxide solid solution is between 1:9 and 1:1. In the modified resin composition of the present invention, when under the influence of laser light, metal particles are released from the metal oxide solid solution; during subsequent electroless chemical plating, these metal particles function as an active center, causing metal ions from a chemical plating solution to selectively deposit, forming a metal thin film; the above can be used in the Surface Mount Technology (SMT) process.

IPC Classes  ?

• C08L 101/00 - Compositions of unspecified macromolecular compounds
• C08K 3/22 - OxidesHydroxides of metals
• B29C 47/40 - using at least two intermeshing screws

Abstract

Disclosed are liquid crystal polyester and a preparation method thereof, a composition containing the same and a use of the composition. The liquid crystal polyester comprises repeating units shown in formulae (I), (II), and (III): (I), (II), and (III).The preparation method of the liquid crystal polyester according to the present invention comprises two steps of melt prepolymerization and solid phase polymerization. The difference between the crystallization temperature and the heat distortion temperature of the resulting liquid crystal polyester is 10-20°C, so that the liquid crystal polyester can be used at its operating temperature without losing its excellent processing performance. Furthermore, the composition prepared by the liquid crystal polyester of the present invention and an inorganic filler has excellent impact resistance and anti-warping property, and can be widely used in the field of electronic appliances.

IPC Classes  ?

• C08L 67/00 - Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chainCompositions of derivatives of such polymers
• C08L 67/04 - Polyesters derived from hydroxy carboxylic acids, e.g. lactones
• C08G 63/60 - Polyesters derived from hydroxy carboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from the reaction of a mixture of hydroxy carboxylic acids, polycarboxylic acids and polyhydroxy compounds
• C08G 63/78 - Preparation processes
• C08G 63/80 - Solid-state polycondensation
• C09K 19/38 - Polymers, e.g. polyamides
• C08K 7/00 - Use of ingredients characterised by shape

Abstract

A modified resin composition used for depositing a metal film, preparation method and use thereof are provided. Said modified resin composition comprises 35-95wt% of resin matrix, 0-60wt% of additive and 5-12wt% of laser-sensitive additive. The formula of said laser-sensitive additive is XY2O4, which is an equiaxed crystal system, as shown in the drawings of abstract, axis length a=b=c, axis angle α=β=γ=90°, X and Y being both metal elements from Periodic Table Group ⅢA,ⅠB, ⅡB, ⅥB, ⅦB or Ⅷ. Laser-sensitive additive comprises 0.01-10wt% of metal oxide, based on total amount of laser-sensitive additive. Laser-sensitive additive releases metal particles under the action of laser on said modified resin composition. In subsequent electroless plating, metal particles act as activation center which make metal ions of chemical bath to deposite selectively, and thus a metal film is formed which can be used as parts of surface mount technology (SMT).

IPC Classes  ?

• C08K 3/22 - OxidesHydroxides of metals
• C08L 101/00 - Compositions of unspecified macromolecular compounds

Abstract

The present invention provides a carbon fiber surface modifier, a modified carbon fiber, composites, and preparation methods therefor. The general structural formula of the carbon fiber surface modifier is as represented by formula (I): in formula (I), R1, R2, R1' and R2' respectively and independently represent hydrogen, hydroxyl, or the alkyl of C1-C3; R3 and R4 respectively and independently represent C1-C18 alkyl, C1-C18 alkoxyl, hydroxyl, amino, halogen, hydrogen, amide, ester, or siloxyl, wherein R3, R4 are not simultaneously hydrogen; R5 represents hydrogen, hydroxyl, amino, halo, or alkoxyl. The carbon fiber surface modifier of the present invention extends the field of application for carbon fibers. The modified carbon fiber can be widely used in thermoplastic resins such as PA, ABS, PEEK, polyolefin, and for the preparation of carbon fiber resin composite material with excellent mechanical properties.

IPC Classes  ?

• D06M 13/368 - HydroxyalkylaminesDerivatives thereof, e.g. Kritchevsky bases
• C08K 9/04 - Ingredients treated with organic substances
• C08K 7/06 - Elements
• C08K 3/04 - Carbon
• C07C 215/50 - Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton with amino groups linked to the six-membered aromatic ring, or to the condensed ring system containing that ring, by carbon chains not further substituted by hydroxy groups with amino groups and the six-membered aromatic ring, or the condensed ring system containing that ring, bound to the same carbon atom of the carbon chain
• C07C 217/58 - Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups bound to carbon atoms of at least one six-membered aromatic ring and amino groups bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings of the same carbon skeleton with amino groups linked to the six-membered aromatic ring, or to the condensed ring system containing that ring, by carbon chains not further substituted by singly-bound oxygen atoms with amino groups and the six-membered aromatic ring, or the condensed ring system containing that ring, bound to the same carbon atom of the carbon chain
• C07C 217/08 - Compounds containing amino and etherified hydroxy groups bound to the same carbon skeleton having etherified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one etherified hydroxy group and one amino group bound to the carbon skeleton, which is not further substituted the oxygen atom of the etherified hydroxy group being further bound to an acyclic carbon atom
• C07C 215/80 - Compounds containing amino and hydroxy groups bound to the same carbon skeleton having hydroxy groups and amino groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton of the same non-condensed six-membered aromatic ring containing at least two amino groups bound to the carbon skeleton
• C07C 219/22 - Compounds containing amino and esterified hydroxy groups bound to the same carbon skeleton having esterified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being unsaturated and containing six-membered aromatic rings
• C07C 213/08 - Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton by reactions not involving the formation of amino groups, hydroxy groups or etherified or esterified hydroxy groups
• C07C 229/34 - Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton containing six-membered aromatic rings
• C07C 227/08 - Formation of amino groups in compounds containing carboxyl groups by addition or substitution reactions, without increasing the number of carbon atoms in the carbon skeleton of the acid by reaction of ammonia or amines with acids containing functional groups
• C07C 211/27 - Compounds containing amino groups bound to a carbon skeleton having amino groups bound to acyclic carbon atoms of an unsaturated carbon skeleton containing at least one six-membered aromatic ring having amino groups linked to the six-membered aromatic ring by saturated carbon chains
• C07C 209/48 - Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines or imino-ethers by reduction of nitriles
• C07C 237/20 - Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups having the carbon atoms of the carboxamide groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton containing six-membered aromatic rings
• C07C 231/12 - Preparation of carboxylic acid amides by reactions not involving the formation of carboxamide groups
• C07F 7/18 - Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
• D06M 101/40 - Fibres of carbon

Abstract

The present invention provides a resin composition with a laser direct structuring function, a method for preparing the resin composition, and an application of the resin composition. The resin composition is formed by the following constituents: 15-60wt% of resin matrices, 30-70wt% of thermal-conductive fillers, 5-12wt% of laser sensitive additives, and 0-15wt% of other additives. A general chemical formula of the laser sensitive additives is XY2O4, and the laser sensitive additives are of an isometric system, and an axial length a=b=c, an axial angle α=β=γ=90°, both X and Y being metal elements and being from a group IIIA, a group IB, a group IIΒ, a group VIB, a group VIIB, or a group VIII in the periodic table of elements. The resin composition in the present invention is heat resistant and has a good thermal conductivity, can selectively deposit metal such as copper, nickel, and gold in an area scanned by laser, and can be used for a part in a surface mounting technology (SMT).

IPC Classes  ?

• C08L 77/06 - Polyamides derived from polyamines and polycarboxylic acids
• C08L 69/00 - Compositions of polycarbonatesCompositions of derivatives of polycarbonates
• C08L 81/02 - PolythioethersPolythioether-ethers
• C08K 3/22 - OxidesHydroxides of metals
• C08K 3/28 - Nitrogen-containing compounds
• C08K 3/34 - Silicon-containing compounds
• C08K 3/38 - Boron-containing compounds

Abstract

Disclosed is a high-glowing-filament-temperature resistant polyphenyl ether/styrene resin composite, which comprises the following materials in percentage by weight: 40-90% of polyphenyl ether, 1-50% of styrene resin, 0.01-5% of acid compound and 0-20% of other functional additives. The polyphenyl ether/styrene resin composite has excellent impact resistance, is rigid, also has a high-glowing-filament-ignition-temperature resistant characteristic. Products made of the polyphenyl ether/styrene resin composite may be applied to industries such as electric appliances, office supplies, and auto parts.

IPC Classes  ?

• C08L 71/12 - Polyphenylene oxides
• C08L 25/04 - Homopolymers or copolymers of styrene
• C08L 59/00 - Compositions of polyacetalsCompositions of derivatives of polyacetals
• C08L 53/02 - Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers of vinyl aromatic monomers and conjugated dienes
• C08L 55/02 - ABS [Acrylonitrile-Butadiene-Styrene] polymers
• C08L 51/00 - Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers
• C08K 5/159 - Heterocyclic compounds having oxygen in the ring having more than two oxygen atoms in the ring

Abstract

Disclosed are a halogen-free fire-retardant polyamide composition, and a preparation method and application thereof. The halogen-free fire-retardant polyamide composition is prepared from 35 to 71.5% of a semi-aromatic polyamide, 10 to 35% of a fire retardant and 0 to 50% of an inorganic reinforcing filler, the terminal amino group content of the semi-aromatic polyamide being 80 to 150 mol/t. The halogen-free fire-retardant polyamide composition of the present invention has good heat stability and releases only a small amount of gas in production; mold dirt is not easily formed, and the halogen-free fire-retardant polyamide composition can be produced continuously.

IPC Classes  ?

• C08L 77/06 - Polyamides derived from polyamines and polycarboxylic acids
• C08K 5/5313 - Phosphinic compounds, e.g. R2=P(:O)OR'
• C08K 3/00 - Use of inorganic substances as compounding ingredients

Abstract

Disclosed are a polypropylene material with a high melt strength, and a preparation process and the use thereof. The polypropylene material is prepared from 65-99.79 parts of polypropylene, 0.01-10 parts of an initiator, 0.1-10 parts of a multi-functional monomer, 0.1-5 parts of a free radical stabilizer and 0-10 parts of an inert processing aid. The free radical stabilizer is a lanthanide rare earth oxide, a carboxylate of a lanthanide rare earth element, a naphthenic acid complex of a lanthanide rare earth element or a dithiocarbamic acid rare earth compound. The lanthanide rare earth element does not include promethium. In the present invention, by controlling the proportion of polypropylene, initiator and multi-functional monomer, increasing the time for the grafting reaction, inhibiting the degradation of polypropylene using rare earth materials and prolonging the lifetime of the free radicals, polypropylene having a high melt strength, a long branched chain and stable performance is obtained and the usage of common polypropylene is improved. The process in the present invention is easy to operate, convenient to control and facilitates industrialized production.

IPC Classes  ?

• C08F 255/02 - Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group on to polymers of olefins having two or three carbon atoms
• C08K 3/22 - OxidesHydroxides of metals
• C08K 5/098 - Metal salts of carboxylic acids
• C08K 5/39 - Thiocarbamic acidsDerivatives thereof, e.g. dithiocarbamates
• B29B 9/06 - Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
• C08L 51/06 - Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond

Abstract

A method for preparing powder resin is provided. The method comprises the following steps: (1) directly cooling a polymer precipitate obtained from a reaction system after performing polymerization reaction at a rate of 2-50℃/minute for 1-60 minutes to obtain polymer colloidal solution, wherein the solution is stirred increasingly and the stirring speed is 10-3000 rpm. (2) adding a certain amount of poor solvent to the mixture to form suspension mixture of the polymer product and the poor solvent when the temperature of the system is at 130-250℃. (3) centrifuging, filtrating or leaching the suspension polymer to remove mother liquid, and then filtrating, so as to obtain polymer crude product. (4) distilling and refining the polymer crude product in high temperature with solvent or boiling water to remove the salt and impurity in the polymer, and drying to obtain the product. The advantages of the method is obtaining size uniform polymer powder through process control, realizing rapid discharging, avoiding change of viscosity in discharging process, solving the problem of adhesion of reaction material to the wall of reaction vessel, and improving production efficiency.

IPC Classes  ?

• C08F 6/10 - Removal of volatile materials, e.g. monomers, solvents
• C08G 65/46 - Post-polymerisation treatment, e.g. recovery, purification, drying
• C08G 65/40 - Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives derived from phenols from phenols and other compounds
• C08G 75/20 - Polysulfones

Abstract

Disclosed in the present invention are a flame retardant modified polypropylene composite improved by ceramic fibre and a preparation process thereof; the composite is composed by weight thus: 60 - 75 parts of a polypropylene resin, 15 - 30 parts of ceramic fibre, 5 - 10 parts of a fire retardant; and 3 - 10 parts of a processing aid. The flame retardant modified polypropylene composite improved by ceramic fibre provided by the present invention has good flame retardance, properties of high heat resistancy, high surface hardness, and at the same time has high internal surface rigidity etc., and has a flame retardant rating up to UL94 V-O and is able to meet the operating requirements for shells and the internal structure components of electrical articles. The process for preparing flame retardant improved polypropylene composite containing ceramic fibre of the present invention uses a twin-screw extrusion device, and has advantages such as a simple procedure, continuity, high production efficiency, and a stable product quality.

IPC Classes  ?

• C08L 23/12 - Polypropene
• C08K 13/06 - Pretreated ingredients and ingredients covered by the main groups
• C08K 9/06 - Ingredients treated with organic substances with silicon-containing compounds