The present disclosure generally relates to dewatering aqueous sludge that is produced by waste water or sewage treatment facilities such as from industrial and municipal processes. The method includes treating an aqueous sludge with an associative and branching or crosslinked inverse emulsion cationic polymer, wherein the associative properties of the cationic polymer are provided by an emulsification surfactant(s) chosen from diblock and triblock polymeric surfactants and / or cross-linking agents.
A composition for improving softness of tissue and/or towel products includes lignocellulosic fibers; water; and a hydrophobic softener that includes the reaction product of: (1) at least one di- and/or poly-amine, (2) at least one chain extender having at least two carboxyl groups; and (3) at least one hydrophobic end-capper. The reaction product comprises a hydrophobic substitution of at least about 25 mole percent of the hydrophobic end-capper based on a total number of moles of active amine sites of the reaction product. In addition, a method of improving softness of tissue and/or towel products includes combining the lignocellulosic fibers, the water, and the hydrophobic softener; and creating the tissue and/or towel products.
A47K 10/16 - Paper towelsToilet paperHolders therefor
D21H 21/14 - Non-fibrous material added to the pulp, characterised by its function, form or propertiesPaper impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
A drainage-optimized additive composition for papermaking is disclosed. The composition comprises an aqueous media and a glyoxalated polyacrylamide (gPAM) resin having a weight average molecular weight (Mw) of at least about 5 MDa. The composition comprises from about 1.95 to about 2.45 wt.% of the gPAM resin. A method of preparing the composition is also disclosed, and comprises preparing a cationic acrylamide (cAM) prepolymer having at least one predetermined property, and selectively glyoxalating the cAM prepolymer by controlling the concentration of the cAM prepolymer in the aqueous media during glyoxalation in relation to the predetermined property. The method may be carried out in situ during a papermaking process (i.e., as an on-site method). A process of forming paper with the composition also disclosed, and comprises combining the composition with the aqueous suspension of cellulosic fibers, forming the cellulosic fibers into a sheet, and drying the sheet to produce a paper.
D21H 17/37 - Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
D21H 17/38 - Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing crosslinkable groups
D21H 21/14 - Non-fibrous material added to the pulp, characterised by its function, form or propertiesPaper impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
Methods for manufacturing sized paper products are provided. An exemplary method includes producing a foam of water, air, a foaming agent, and a sizing agent. Further, the exemplary method includes applying the foam to a web and processing the web to form the product.
The current method relates to an on-line characterization of paper or paper products, such as tissue or other crepe paper products. The method uses an imaging source wherein one or more images are obtained of the sheets surface or topographical area or region, or the image is of an edge of a formed sheet. The one or more images are enhanced and analyzed using various techniques and metrics for characterizing the structure of the formed sheet. The information provides for real time adjustments on the machine.
A method for isolating a humic substance from alumina process liquor is provided herein. Separate from or within the method, bauxite is processed to form the alumina process liquor. The method includes providing a diallyldimethylammonium chloride-containing polymer. The method further includes providing an amine-containing polymer. The method further includes combining the diallyl dimethyl ammonium chloride, the amine-containing polymer, and the alumina process liquor, to isolate the humic substance from the alumina process liquor.
A size press composition for improving properties of lignocellulosic material is provided herein. The size press composition includes an aluminum salt and an anionic styrene acrylate emulsion sizing agent. The aluminum salt and the anionic styrene acrylate emulsion sizing agent are substantially homogeneously dispersed within the size press composition based on visual observation utilizing a microscope at 10X magnification. A size press composition formed by a process is also provided herein. The process includes combining a dye and a starch to form a dye mixture. The process further includes combining the dye mixture, a styrene acrylate emulsion sizing agent, and an aluminum salt to form the size press composition. The dye, the starch, the aluminum salt, and the styrene acrylate emulsion sizing agent are substantially homogeneously dispersed within the size press composition based on visual observation utilizing a microscope at 10X magnification.
D21H 21/00 - Non-fibrous material added to the pulp, characterised by its function, form or propertiesPaper impregnating or coating material, characterised by its function, form or properties
A method for forming a speciated solution of ammonium carbamate is provided herein. The method includes, but is not limited to, providing a reactor comprising a solution of ammonia. The method further includes, but is not limited to, feeding carbon dioxide through the solution of ammonia to form a mixture. The method further includes, but is not limited to, combining a solution of sodium hydroxide and the mixture to form the ammonium carbamate.
A foaming formulation is provided herein. The foaming formulation includes at least one foaming agent in an amount of from about 0.001% to about 10% by weight based on a total weight of the foaming solution. The foaming formulation further includes a synthetic strength additive having a cationic functional group in an amount from about 0.01% to about 50% by weight based on a total weight of the foaming solution. The foaming formulation further includes water.
A method for treating a substrate is provided herein. The method includes providing a substrate and applying a composition to the substrate to form the treated substrate. The composition includes a binder, a binder additive, and an aluminum salt. A method for improving adhesion of an image to the treated substrate is also provided herein. The method includes providing the substrate, applying the composition to the substrate to form the treated substrate, and applying a liquid toner to the treated substrate to form the image on the treated substrate. A printed material exhibiting improved adhesion of the image to the treated substrate is also provided herein. The printed material includes a treated substrate. The treated substrate includes the substrate and a coating disposed on the substrate and formed from the composition. The printed material further includes the image disposed on the treated substrate and formed from the liquid toner.
A process is disclosed for making paper having improved filler retention and opacity. The process includes the step of adding Additive A and Additive B to a slurry in a wet end of a paper machine wherein the slurry comprises pulp and a filler. Additive A is a wet strength agent. Additive B is an anionic polymer having a charge density from about -3000 to about -7000 ueq/g on a dry basis when measured in a buffer having a pH of about 6. Additive B also has a weight average molecular weight of from about 150,000 to about 1,000,000, Daltons.
A method of controlling and removing biofilm on a surface in contact with an aqueous industrial system comprising the step of adding an effective amount of biofilm-disrupting agent and adding a biocide to the aqueous system being treated to reduce and remove biofilm forming microbes from a surface in contact with the aqueous system is disclosed. Also disclosed is a synergistic composition of polyethyleneimine and an oxidizing biocide.
A01N 59/00 - Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
A01P 1/00 - DisinfectantsAntimicrobial compounds or mixtures thereof
A61L 2/16 - Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lensesAccessories therefor using chemical substances
C02F 1/50 - Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
C02F 1/72 - Treatment of water, waste water, or sewage by oxidation
C02F 1/76 - Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
Disclosed herein are hydrophobic vinylamine-containing polymers useful as papermaking performance additives for enhancing paper softness with little or no negative effect on paper dry strength properties. The hydrophobic vinylamine-containing polymers are produced by incorporating hydrophobic functional property into primary amine moiety of the vinylamine-containing polymers via reactions with reactive hydrophobes. The hydrophobically modified vinylamine-containing polymers can be further used as base polymers for polymerization with a vinyl monomer by free radical initiated polymerization. The compositions of those hydrophobic vinylamine-containing polymers have shown improved softness, reduced coefficient friction to paper products while maintained or improved dry strength properties of the paper products.
A method of enhancing adhesion of an image to at least one surface of a substrate is provided herein. The method includes treating at least a portion of the surface by applying a composition comprising one or more polymers to the portion of the surface. The method further includes drying the composition after applying the composition to the substrate to form a treated substrate. The method further includes printing an image from an electrophotographic printer utilizing liquid toner technology on the treated substrate. The substrate is treated and dried less than about 5 minutes prior to being printed.
G03G 15/01 - Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
G03G 15/11 - Removing excess liquid developer e.g. by heat
G03G 15/16 - Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern
16.
A COMPOSITION AND METHOD OF PRODUCING A CREPING PAPER AND THE CREPING PAPER THEREOF
The present disclosure provides for a composition and method of producing a creped paper and the creped paper products made using this method. The method includes treating the surface of a wet fibrous web and/or surface of a Yankee drum dryer or cylinder with compositions containing a combination of a polyaminosilicone/polyaminosilicone block copolymer/surfactant and optionally one or more creping aids.
D06M 15/647 - Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain containing polyether sequences
D21H 21/14 - Non-fibrous material added to the pulp, characterised by its function, form or propertiesPaper impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
17.
METHOD FOR MAKING LIGNOCELLULOSIC PAPER AND PAPER PRODUCTS
Enzyme compositions comprising laccase, lipase, cationic polymer, and optionally laccase activator, for paper making application are disclosed. It also relates to the use of the enzyme composition to improve dry strength property of a paper product made from lignocellulosic-containing materials before or after mechanical refining in a paper making process.
A process for preventing/inhibiting/controlling complex scale in mining operations comprises adding to an aqueous mineral ore slurry having a solids content of at least 10%, an amount based on the aqueous phase of from 5 ppm to 300 ppm active component of a scale inhibiting composition. The scale inhibiting composition has an active component selected from (a) a carboxylate polymer having the formula (see above formula) wherein R1 is selected from the group consisting of sulfonate, sulfate, phosphonate, alcohol, 1,1-diphenylhexyl, tert-butyl, mercaptoethanol, mercaptopropionic acid, and mercaptoglycolic acid; R2 is a polycarboxylate; and R3 is H or R1; or (b) a polyamino acid having the formulapoly(X)m poly(Y)nwherein X and Y are independently selected from the group consisting of an amino acid, a salt of an amino acid and an amino acid derivative, m can be from 2 to 60, n can be up to 60, and the sum of m and n is at least 5. The pH of the mineral ore slurry is below 9.0 and the complex scale comprises gypsum.
C02F 5/10 - Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
C23F 14/02 - Inhibiting incrustation in apparatus for heating liquids for physical or chemical purposes by chemical means
C23F 15/00 - Other methods of preventing corrosion or incrustation
19.
PROCESS TO PRODUCE AN ACYLATED VINYLAMINE-CONTAINING POLYMER AND ITS APPLICATION AS A PAPERMAKING ADDITIVE
A process for producing an acylated vinylamine-containing polymer is disclosed. The acylated vinylamine-containing polymer is produced by reacting a vinylamine-containing polymer with at least one acylating agent.
C08F 26/02 - Homopolymers or 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 a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen by a single or double bond to nitrogen
D21H 17/54 - Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
Disclosed is a sizing composition comprising a hydrophobic paper sizing agent and a hydrophobically modified poly(aminoamide). Also disclosed is a method of making the sizing composition and a method of using the sizing composition.
A method is provided for the use of a chemical additive to improve the separation of oil from the process stream (whole stillage, thin stillage or syrup) generated as a byproduct in corn to ethanol production.
The present invention provides an improved composition of soy with a non-urea diluent at a pH of less than 5.0, having improved viscosity stability with excellent wet and dry strengths, with more efficient production and lower production costs. Optionally, the composition may also include adding a crosslinking agent, additional diluent or both to the soy-non urea diluent adhesive and/or adding an emulsified or dispersed polymer.
Stable, coating compositions are disclosed. The compositions comprise an aqueous solution of cationic polymer, starch, and a stabilizing agent. Method of using the coating composition to improve the dry strength of paper is also disclosed.
C08L 3/00 - Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
C09D 133/00 - Coating compositions based on homopolymers or 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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereofCoating compositions based on derivatives of such polymers
C09D 133/14 - Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
C09D 133/26 - Homopolymers or copolymers of acrylamide or methacrylamide
24.
PAPERMAKING ADDITIVES FOR ROLL RELEASE IMPROVEMENT
Compositions and methods for reduction in adhesion between wet paper web and roli surfaces in papermaking process are disclosed. The method is particularly useful for improvements in press section roll release.
Disclosed is a novel composition comprising (a) 50-98 parts of hydrocarbon oil, (b) 1-40 parts of emulsifier, and (c) 1-10 parts of a non-curing hydrocarbon polymer. Aiso disciosed is a method of reducing adhesion to the surface of equipment used in paper manufacture or in paper converting processes, comprising applying to the surface the disclosed novel composition.
D21H 21/14 - Non-fibrous material added to the pulp, characterised by its function, form or propertiesPaper impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
26.
PROTEIN ADHESIVE FORMULATIONS WITH AMINE-EPICHLOROHYDRIN AND ISOCYANATE ADDITIVES
Disclosed is an adhesive composition comprising a protein component, an AE adduct component and an isocyanate component. Also disclosed is a composite and a method of making a composite comprising a substrate and the adhesive composition of the present invention.
B05D 5/10 - Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an adhesive surface
A stable aqueous composition comprising poiyvinylamine and liquid cationic starch a ratio of from 90 to 55 parts of poiyvinylamine on active basis to 10 to 45 parts of liquid cationic starch on active basis is disclosed. The composition can be used in papermaking as a strength or as a drainage aid.
The invention is directed to composition, preparation and use of composite materials based on an adhesive with solids levels above 45% by weight that contain stable polyamidoamine-epihalohydrine resins (PAE resins) of solids greater than 40% where the relative high solids of the PAE enables the high solids content of the adhesive. Furthermore, at least 45% of the solids portion of the adhesive is made up of a combination of the solids of the PAE resin and the solids of the protein source. The invention is also directed an adhesive comprised of the PAE in combination with a soy protein source. The invention is also directed toward use of the adhesive in composite materials and in particular wood containing composite materials, and more specifically wood fiber or particle based composites.
A process is disclosed for the production of paper with enhanced dry strength comprising adding to the wet end of a paper machine, (a) a vinylamine-containing aqueous solution polymer having a molecular weight of from 75,000 daltons to 750,000 dalions and (b) an amphoteric or cationic acrylamide-containing aqueous solution polymer having a molecular weight of from 75,000 daltons to 1,500,000 daltons, wherein the sum of the anionic and cationic monomers comprises at least 5% on a molar basis of the composition of the acrylamide-containing polymer.
A stable paper sizing composition comprising a dispersion of ketene dimer and a pH adjusted vinylamine containing polymer is disclosed. The method of preparing the stable sizing composition and the method of using the stable sizing composition is also disclosed.
Stable, coating compositions useful for enhancing the dry strength of paper are disclosed. The compositions comprise an aqueous solution of nearly neutral polyacrylamide, cationic polymer and starch. Method of using the coating composition to enhance the diy strength of paper is also disclosed.
The present invention provides an improved method of producing a stable acid denatured soy/urea adhesive having improved wet and dry strengths, with more efficient production and lower production costs. The method comprises combining urea with soy flour that has been acid treated until denatured and substantially free from urease activity. The soy flour is preferably lowered to a pH of 2.0 to 4.0 for at least 1 minute. Optionally, the method may also include adding a crosslinking agent, diluent or both to the soy flour/urea adhesive and/or adding an emulsified or dispersed polymer. Adhesives and dispersions prepared according to the methods of this invention offer increased stability and strength properties.
B27D 1/04 - Joining wood veneer with any materialForming articles therebyPreparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefromPlywood sheets
C09J 131/04 - Homopolymers or copolymers of vinyl acetate
C09J 189/00 - Adhesives based on proteinsAdhesives based on derivatives thereof
A process to increase the resistance of paper board to hot penetrants using a sizing agent containing fatty acid anhydride, and an insolubilizing agent is disclosed. Additionally, a composition useful to impart hot penetrant resistance is disclosed.
Methods for improving one or more surface properties of a sheet of paper or paperboard, which method comprises (a) coating at least one side of the sheet of paper or paperboard with a dispersion having a cationic zeta potential formed by combining (1) a mixture containing one or more anionic pigments with (2) one or more polyamine- epihalohydrin cationic wet strength resins at a coating weight of from about 0.1 g/m to about 20 g/m; (b) drying the coated sheet of paper or paperboard; (c) applying a functional barrier top coating that resists one or more of the following: liquid water, water vapor, gas permeability, oil and grease, slip, and static or an anionic latex based pigment coating that imparts improved opacity, brightness, or printability. The invention also includes the dispersions as well as paper or paperboard coated with the dispersion.
D21H 19/40 - Coatings with pigments characterised by the pigments siliceous, e.g. clays
D21H 19/62 - Macromolecular organic compounds or oligomers thereof obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
D21H 19/80 - Paper comprising more than one coating
D21H 19/82 - Paper comprising more than one coating superposed
Vinylamine-containing polymers are disclosed where the amine groups are substituted with cationic functional groups. Processes for preparing such polymers, as well as compositions comprising such polymers are also disclosed. Among other applications, these polymers can be used in papermaking applications as dry strength additives, wet strength additives, retention aids, drainage aids, and pitch and stickies control agents.
C08F 8/44 - Preparation of metal salts or ammonium salts
C08F 226/02 - 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 a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen by a single or double bond to nitrogen
D21H 17/46 - Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
D21H 19/24 - Coatings without pigments applied in a form other than the aqueous solution defined in group comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
Disclosed herein are hydrophobically-modifed poly(aminoamides) useful as fixative detackifiers for stickies and pitch control in papermaking processes. These polymers are prepared via modification of amine-containing water-soluble poly(aminoamides) with reactive functional group-containing hydrophobic compounds, hi particular, poly(am?ioamides) may be modified, under appropriate reaction conditions, with long chain alkyl glycidyl ether, AKD (alkyl ketene dimer), ASA (alkyl succinyl anhydride), or Quab (3-chloro-2-hydroxypropyl-N,N,N-dimethylalkyl ammonium chloride). These novel polymers are effective in inhibiting deposition of organic contaminants in pulp and papermaking systems.
D21H 21/00 - Non-fibrous material added to the pulp, characterised by its function, form or propertiesPaper impregnating or coating material, characterised by its function, form or properties
37.
COPOLYMER BLEND COMPOSITIONS FOR USE TO INCREASE PAPER FILLER CONTENT
Methods for making a heterogeneous polymer blend comprising one or more anionic polymers, one or more cationic polymers, and one or more non-ionic polymers, which method comprises (a) adding to a non-neutral solution a first amount of polymerization initiator and one or more anionic or cationic monomers, wherein each monomer has the same charge; (b) adding a second amount of the polymerization initiator and one or more non-ionic monomers; (c) adding a third amount of the polymerization initiator and one or more ionic monomers that are oppositely charged from the monomers of (a); adding stepwise, a fourth amount of the polymerization initiator to react any residual monomer, and (e) neutralizing the resulting polymer blend. Also claimed are heterogeneous polymer blends containing polymers formed from one or more anionic, cationic, and non-ionic monomers, either polymerized in situ or separately and then combined. Also claimed are methods for increasing the filler content of paper or paperboard, which methods comprises (a) combining the heterogeneous polymer blend with a precipitated calcium carbonate filler; (b) combining the resulting mixture with a pulp slurry; and (c) processing the resulting slurry mixture to form a sheet of paper or paperboard. Finally, also claimed are methods of increasing the filler content of paper or paperboard, which method comprises (1) combining either the heterogeneous blend or the precipitated calcium carbonate filler with a pulp slurry, (2) combining the remaining component with the pulp slurry; and (c) processing the resulting pulp slurry mixture to form a sheet of paper or paperboard.
The present invention discloses an adhesive composition comprising a protein component, an azetidinium functionalized polymer component and a viscosity modifying component. The preferred protein is a soy protein and the viscosity modifying component is preferably a sulfite reducing agent, a thiol, or combinations thereof. The invention provides for a high solids, lower viscosity adhesive formulation. The present invention also relates to a composite and a method of making a composite comprising a substrate and the adhesive composition of the present invention.
Compositions and methods for the removal of resin from wood chips processed in a Kraft pulping process are disclosed. The method is particularly useful for removing triterpene and triterpenoid resin.
Size press compositions and methods for producing sized paper products, including liner board are disclosed. The Size press compositions contain at least one non-reactive cationic surface sizing agent at least one reactive sizing agent, at least one promoter resin, at least one binder, and water. The at least one non -reactive cationic surface sizing agent may be a polymer in the form of a dispersion, an emulsion or a latex with a positive zeta potential below about pH6. The at least one reactive sizing agent may be a dispersion, an emulsion or a latex including an alkyl ketene dimer or an alkyl succinic anhydride. The at least one promoter resin may be a polyaminoamide-epichlorohydrin resin or poly (dimethyldiallylammonium chloride).
A method and an apparatus for measuring the depositability of particulate contaminantspresent in a pulp or paper mill fluid stream and evaluating interactions of such particulatecontaminants with other contaminants collects the particulate contaminants on a suitablesubstrate, such as a plastic film coated with an adhesive or coated with. organiccontaminate, placed in contact with the pulp or paper mill fluid stream for at least five minutesup to several hours. The amount of contaminants collected on the substrate is quantified andevaluated by taking one or more scanned images of the substrate with a resolution of at least2,000 dots per inch (DPI) and analyzing the scanned images with image analysis technique.
The disclosure relates to an adhesive composition for bonding lignocellulosic substrates. The adhesive composition contains a crosslinker and a non-urea diluent where the non-urea diluent is present in an amount from about 0.01 to about 75 weight % based on the total wet weight of the composition and where the crosslinker contains essentially no formaldehyde. Also disclosed is the adhesive further containing, an aqueous mixture of a protein source. The disclosure also relates to a process for making lignocellulosic composites utilizing the disclosed adhesive composition and to the lignocellulosic composites made using the disclosed process.
Polyamidoamine (PAE) resins are prepared from polyamidoamine made with excess amine, which are reacted with a specifically defined amount of difunctional crosslinker. The amount of difunctional crosslinker used is based on the polyamidoamine amine number and reduced specific viscosity (RSV). The PAE resin is prepared by first synthesizing a polyamidoamine from a polyamine and a polycarboxylic acid or polycarboxylic acid derivative, wherein the polyamine is present in a molar excess, said molar excess being from about 1.02 to 2.00, then reacting the polyamidoamine with difunctional crosslinker, wherein the weight % of difunctional crosslinker to polyamidoamine solids is no more than about 0.308(amine number/RSV) - 9.18 or 0,385(amine number/RSV) - 5.20, wherein the amine number is expressed as the milliequivalents of amine per gram of polyamidoamine solids and the RSV is the reduced specific viscosity measured at 2 % concentration in IM NH4CI expressed in deciliters per gram. PAE resins prepared according to this process can by used in creping adhesives, which are used to manufacture a variety of paper articles, such as facial tissue, bath tissue, wipes, paper towels, paper napkins, filter papers, and coffee filters.
D21H 21/14 - Non-fibrous material added to the pulp, characterised by its function, form or propertiesPaper impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
44.
MICHAEL ADDITION ADDUCTS AS ADDITIVES FOR PAPER AND PAPERMAKING
Several Michael addition adducts of vinylamines with .alpha.,.beta..-unsaturated alkyl carbonyl compounds including amides, esters and acids, particularly acrylamide are presented. Additionally, a process for producing these Michael addition adducts is described. These adducts are generally useful in the manufacture of paper and are particularly useful as dry strength additives to make paperboard products using a papermaking machine.
An apparatus and methods to produce synergistic mixtures (or combinations) of haloamines to control growth of microorganisms in aqueous systems are disclosed. The apparatus and methods to produce synergistic mixtures entails producing a batch quantity of a haloamine and converting part of the haloamine to a second haloamine species to form the synergistic mixture.
A method of improving retention and drainage in a papermaking process is disclosed. Theaddition of an associative polymer, a poly(vinylamine) and optionally a siliceous material tothe papermaking slurry to improve retention and drainage is disclosed. Additionally a methodto improve retention and drainage comprising addition of an organic microparticle, apoly(vinylamine) and optionally a siliceous material to the papermaking slurry is disclosed.A composition comprising an associative polymer, and a poly(vinylamine) and optionallyfurther comprising cellulose fiber is disclosed.
This invention relates to resins useful for imparting strength to paper, the process of incorporating these resins into paper and the paper produced containing the resins. In particular the invention relates to resins useful for imparting dry-strength and wet-strength to paper under conditions of high sulfite ion concentrations.
C08F 8/28 - Condensation with aldehydes or ketones
C08F 212/14 - Monomers containing only one unsaturated aliphatic radical containing one ring substituted by hetero atoms or groups containing hetero atoms
C08F 226/06 - 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 a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen by a heterocyclic ring containing nitrogen
A method to invert an inverse emulsion water compatible polymer product using a combination of surfactants that have specific chemical structures is disclosed. A combination, or blend, of two or more surfactants provides for an effective breaker system. The blend of surfactants is more effective than the individual surfactants.
A method for controlling Pitch and Stickies is disclosed. The method comprises adding hydrophobically modified hydroxyethyl cellulose (HMHEC) and cationic polymers to a cellulosic fiber slurry (pulp) or to a paper process or to a paper making system and results in a higher degree of inhibiting organic deposition and retention of pitch on paper fiber as compared to the inhibition of the individual ingredients. The combination of HMHEC and cationic polymers surprising results in a synergistic effect.
patents