Acrylamide Containing Patents (Class 162/168.3)
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Patent number: 8152962Abstract: A process for producing paper of high basis weight by draining a paper pulp on a wire in the presence of a combination of at least two polymers as a retention and drainage aid system, forming sheets, and drying the sheets, which comprises forming the sheets in the absence of finely divided inorganic flocculants and using as retention and drainage aids (a) at least one amino-containing polymer and (b) at least one branched cationic polyacrylamide.Type: GrantFiled: December 1, 2005Date of Patent: April 10, 2012Assignee: BASF AktiengesellschaftInventors: Oliver Koch, Rainer Blum, Ron Van Dijk
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Patent number: 8123906Abstract: Compositions and methods of producing paper-based materials are disclosed. In general, the techniques utilize an amine-containing polymer, such as chitosan, to functionalize one or more components of a mixture used to form materials such as paper-based materials. Such components can include the fibers of a pulp and/or filler particles. In one instance, either the pulp or the filler particles are functionalized, but not both. Such functionalization can improve the qualifies of a paper-based material relative to when such functionalization is not utilized. Techniques and compositions are also described to further improve the qualities of a paper material by utilizing a complementary polymer which can couple with the amine-containing polymer.Type: GrantFiled: August 1, 2008Date of Patent: February 28, 2012Assignee: NanoPaper, LLCInventors: David S. Soane, Michael C. Berg, William A. Mowers
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Patent number: 8088252Abstract: A solution with a salt-sensitive polymer binder for use in fibrous webs, where the binder contains a copolymer comprising repeat units derived from butyl acrylate, methyl methacrylate and amino functionalized alkyl acrylate or methacrylate or amino functionalized alkyl acrylamide or methacrylamide optionally including monomers such as vinyl acetate and/or vinyl acetate/ethylene. The binder solution is prepared by emulsion-polymerizing a copolymer and then neutralizing the copolymer with acid to make it water soluble. The binders are particularly suitable for strengthening nonwoven fibrous webs in disposable articles such as wet-wipes, personal care products, diapers, and the like and retain their salt-sensitivity with or without divalent metal scavengers.Type: GrantFiled: March 2, 2009Date of Patent: January 3, 2012Inventors: Rajeev Farwaha, Philip Confalone
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Anionic functional promoter and charge control agent with improved wet to dry tensile strength ratio
Patent number: 8070914Abstract: The invention relates to a composition comprising (a) a functional promoter comprising a water-soluble anionic polymer having a molecular weight of at least about 50,000 daltons and a molecular weight charge index value of at least about 10,000; (b) a cationic surfactant component; such that when the composition treats a fibrous substrate, in conjunction with a cationic strength agent, the treated fibrous substrate exhibits (i) a ratio of wet tensile strength to dry tensile strength ranging from about 1:5 o to about 1:2 and (ii) an increase in a ratio of wet tensile strength to dry tensile strength of at least about 10%, as compared to when the fibrous substrate is treated with the functional promoter and without a surfactant. The invention also relates to a paper product made with such a system, and method for imparting wet strength to a paper product with the functional promoter.Type: GrantFiled: April 9, 2010Date of Patent: December 6, 2011Assignee: Kemira OyjInventors: Michael Ryan, William Brevard -
Patent number: 8066847Abstract: A composition comprising one or more polyaminoaminde epihalohydrin resins and one or more polyamides in a ratio of about 1:99 to about 99:1 based on polymer actives and use of the composition for creping paper webs.Type: GrantFiled: December 29, 2005Date of Patent: November 29, 2011Assignee: Nalco CorporationInventors: Vladimir A. Grigoriev, Gary S. Furman, Sammy Lee Archer, Winston Su, Christopher D. Kaley, Mingli Wei
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Patent number: 8048267Abstract: The present invention relates to a sizing or coating composition that, when applied to paper substrate, creates a substrate having improved waterfastness, surface strength, and surface strength as measured by resistance to abrasion. In addition, the present invention relates to paper substrates containing the composition, as well as methods of using and making the paper substrate and composition.Type: GrantFiled: May 21, 2008Date of Patent: November 1, 2011Assignee: International Paper CompanyInventors: Michael F Koenig, Kapil M Singh
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Patent number: 8038846Abstract: According to the present invention, a process is provided for making paper or board comprising forming a cellulosic suspension that may or may not comprise a filler, flocculating the cellulosic suspension, draining the cellulosic suspension on a screen to form a sheet, wherein the cellulosic suspension is flocculated using a flocculation system comprising the sequential or simultaneous addition of a siliceous material and an organic, cationic or anionic, water-in-water or dispersion micropolymer in a salt solution.Type: GrantFiled: September 14, 2007Date of Patent: October 18, 2011Assignee: Kemira OyjInventors: Marco Savio Polverari, Christopher Michael Lewis, Matthew Gerard Fabian
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Patent number: 8029647Abstract: Process for the production of paper, board and cardboard by draining a paper stock on a wire with sheet formation and drying of the sheets, the sheet formation being carried out in the absence of finely divided inorganic flocculants and (a) polymers comprising vinylamine units and/or polyvinylformamide having a molar mass Mw of, in each case, at least 1 million and (b) at least one cationic or nonionic polyacrylamide and/or one cationic or nonionic polymethacrylamide having a molar mass Mw of, in each case, at least 2.5 million being used as retention aids.Type: GrantFiled: September 8, 2005Date of Patent: October 4, 2011Assignee: BASF AktiengesellschaftInventors: Marc Leduc, Rainer Blum, Peter Leifert
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Publication number: 20110226432Abstract: A method of mixing at least two chemicals or additives into a process liquid flow flowing in a process liquid flow duct including: feeding a liquid jet to the process liquid flow in the process liquid flow duct, wherein the liquid jet is formed in a feeding device and the liquid jet flows in a transverse direction to a flow direction of the process liquid flow through the process liquid flow duct; mixing the at least two chemicals or additives together to form a mixture; feeding the mixture of the at least two chemicals or additives into the process liquid flow duct with the feeding liquid jet, and mixing the at least two chemicals or additives with the feeding liquid jet in the process liquid flow duct.Type: ApplicationFiled: May 16, 2011Publication date: September 22, 2011Applicant: WETEND TECHNOLOGIES OYInventor: Jouni MATULA
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Patent number: 7981250Abstract: According to the present invention, a process is provided for making paper or board comprising forming a cellulosic suspension that may or may not comprise a filler, flocculating the cellulosic suspension, draining the cellulosic suspension on a screen to form a sheet, wherein the cellulosic suspension is flocculated using a flocculation system comprising the sequential or simultaneous addition of a siliceous material and an organic, cationic or anionic, dispersion micropolymer in a salt solution.Type: GrantFiled: September 14, 2006Date of Patent: July 19, 2011Assignee: Kemira OyjInventors: Marco Savio Polverari, Christopher Michael Lewis, Matthew Gerard Fabian, Sr.
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Patent number: 7972478Abstract: In a method of producing a sheet of paper and/or cardboard and similar products, prior to the formation of the sheet from a fibrous suspension, at least two dry strength agents are added to the suspension either separately in any order or mixed together and at one or more injection points, namely: a first agent corresponding to a product for Hofmann degradation in solution on a base (co)polymer comprising at least one non-ionic monomer which is selected from the group containing acrylamide and/or methacrylamide, N,N dimethylacrlamide and/or acrylonitrile; and a second agent corresponding to a (co)polymer having an anionic charge density greater than 0.1 meq/g. The Hofmann degradation product comprises an organic polymer produced at a concentration greater than 3.5% by weight, and preferably greater than 4.5% and the first and second agents are each introduced into the pulp suspension at a concentration of between 0.Type: GrantFiled: January 11, 2006Date of Patent: July 5, 2011Assignee: S.P.C.M. SAInventors: René Hund, Christian Jehn-Rendu, Fabrice Moretton
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Patent number: 7967953Abstract: This invention relates to a paper substrate containing high surface sizing and low internal sizing and having high dimensional stability, as well as methods of making and using the composition.Type: GrantFiled: May 5, 2010Date of Patent: June 28, 2011Assignee: International Paper CompanyInventors: Kapil M. Singh, Dennis W. Anderson, Peter M. Froass, Yaoliang Hong, Krishna Kosaraju Mohan, Thomas R. Arnson, Yan C. Huang
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Patent number: 7955473Abstract: The present invention relates to a process for producing paper which comprises: (vii) providing an aqueous suspension comprising cellulosic fibres, (viii) adding to the suspension after all points of high shear: a first polymer being a cationic polymer having a charge density above 2.5 meq/g; a second polymer; and a third polymer being an organic or inorganic anionic polymer; and (ix) dewatering the obtained suspension to form paper.Type: GrantFiled: December 14, 2005Date of Patent: June 7, 2011Assignee: Akzo Nobel N.V.Inventors: Fredrik Solhage, Joakim Carlén, Birgitta Johansson
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Patent number: 7918965Abstract: Process for the production of paper, board and cardboard by draining a paper stock with sheet formation in the presence of a retention aid system comprising (i) at least one polymer comprising vinylamine units, in the form of the free bases, of the salts and/or in quaternized form, as the sole cationic polymer, (ii) at least one linear, anionic polymer having a molar mass Mw of at least 1 million and/or at least one branched, anionic, water-soluble polymer and/or bentonite and/or silica gel and (iii) at least one particulate, anionic, crosslinked, organic polymer having a mean particle diameter of at least 1 ?m and an intrinsic viscosity of less than 3 dl/g, and use of the retention aid system comprising the components (i), (ii) and (iii) as an additive in the production of paper, board and cardboard.Type: GrantFiled: September 5, 2006Date of Patent: April 5, 2011Assignee: BASF AktiengesellschaftInventors: Marc Leduc, Oliver Koch, Simon Champ, Rainer Blum, Andreas Merkel, Knut Menke
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Publication number: 20110073265Abstract: The invention relates to a process for producing paper or board from an aqueous fibre suspension, which process includes the step of adding a process chemical to the aqueous fibre suspension, said process chemical being a polymer obtained by controlled radical polymerization technique from an ethylenically unsaturated monomer, a chain transfer agent, and an initiator in a liquid medium or by controlled photopolymerization technique from an ethylenically unsaturated monomer and a photoiniferter in a liquid medium. The process chemical improves the runnability and productivity of the paper or board machine.Type: ApplicationFiled: May 21, 2008Publication date: March 31, 2011Inventors: Rosa Carceller, Ari Juppo
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Patent number: 7901543Abstract: A composition for enhancing the dewatering of a paper sheet on a paper machine and a method for using the composition is disclosed. The composition comprising one or more aldehyde-functionalized polymers comprising amino or amido groups wherein at least about 15 mole percent of the amino or amido groups are functionalized by reacting with one or more aldehydes and wherein the aldehyde functionalized polymers have a molecular weight of at least about 100,000. The method comprising adding the composition to the paper machine at a dosage of about 0.05 lb/ton to about 15 lb/ton, based on dry fiber.Type: GrantFiled: December 14, 2009Date of Patent: March 8, 2011Assignee: Nalco CompanyInventors: Michael R. St. John, Angela P. Zagala
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Patent number: 7897013Abstract: Compositions comprising a blend of two or more paper strengthening agents have improved stability compared with previously known paper strengthening agents. One component is a polymeric paper strengthening agent, preferably a wet strengthening agent. The other component is a stabilized polyacrylamide prepared by (1) reacting a first portion of glyoxal with a polyacrylamide having pendant amide groups to form a first reaction mixture comprising polyacrylamide; (2) adding an acid to the first reaction mixture to form a second reaction mixture having a reduced pH and comprising the polyacrylamide; and (3) adding a second portion of glyoxal to the second reaction mixture to form the stabilized polyacrylamide. If desired, an aldehyde scavenger can be included in one or more of step (1), step (2), step (3), or the stabilized polyacrylamide. Such compositions can be used to enhance the strength of paper, particularly the wet strength of paper.Type: GrantFiled: November 21, 2008Date of Patent: March 1, 2011Assignee: Georgia-Pacific Chemicals LLCInventors: Cornel Hagiopol, Yuping Luo, David F. Townsend, James W. Johnston, Clay E. Ringold, Karla D. Favors
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Patent number: 7883603Abstract: A method for making a sheet of paper and/or cardboard and the like, comprises, prior to forming said sheet, adding to the fibrous suspension, separately or mixed, in any sequence of introduction, into one or more injection points, at least three dry strength agents respectively: first agent corresponding to a (co)polymer having a cationic filler density higher than 1 meq/g and exhibiting primary amine functions; a second agent corresponding to a synthetic organic (co)polymer having cationic filler density higher than 0.1 meq/g; and a third agent corresponding to a (co)polymer having an anionic filler density higher than 0.1 meq/g.Type: GrantFiled: January 31, 2006Date of Patent: February 8, 2011Assignee: S.P.C.M. SAInventors: Rene Hund, Christian Jehn-Rendu, Fabrice Moretton
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Patent number: 7842162Abstract: A method is provided for manufacturing paper by means of layer-by-layer nanocoating techniques. The method comprises the sequential processing of an aqueous pulp of lignocellulose fibers which is first subjected to nanocoating by alternatively adsorbing onto the fibers multiple consecutively-applied layers of oppositely-charged nanoparticles, polymers and/or proteins thereby making a modified aqueous pulp of multi-layer nanocoated lignocellulose fibers, then draining the water out of the modified pulp to form sheets of multi-layer nanocoated fibers, and drying the formed sheets of multi-layer nanocoated fibers. The resulting dried sheets are then processed to make a finished paper that has superior physical strength and improved surface properties.Type: GrantFiled: March 11, 2006Date of Patent: November 30, 2010Assignee: Louisiana Tech University Foundation, Inc.Inventors: Yuri M. Lvov, George Grozdits
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Publication number: 20100288457Abstract: The present invention provides a process for preparing a paper or paper board of improved strength which comprises the steps of i) providing a cellulosic thick stock, ii) diluting the thick stock of step i) to form a thin stock, iii) draining the thin stock of step ii) on a wire to form a web, and iv) drying the web of step iii) to form paper or paper board, wherein the cellulosic thick stock of step (i) comprises organic polymeric microparticles, as well as paper obtainable by above process.Type: ApplicationFiled: October 15, 2007Publication date: November 18, 2010Inventors: Suleman Buwono, Gary Reddihough, Jozef Maria Leonardus Dogge
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Patent number: 7828934Abstract: 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.Type: GrantFiled: December 15, 2005Date of Patent: November 9, 2010Assignee: Hercules IncorporatedInventors: Shane Cyr, Henk Bakker, Willem Marinus Stevels, Ronald Richard Staib
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Patent number: 7815771Abstract: A process for the manufacture of paper, board or similar products, comprises first of all, adding, to the paper pulp fibrous suspension, at least one main retention aid composed of a cationic (co)polymer. Then optionally the flocs obtained are sheared. Subsequently there is added to the suspension, separately or as a mixture, in any order: at least one secondary retention aid chosen from the group consisting of silica derivatives and anionic or amphoteric organic polymers, and at least one tertiary retention aid composed of a crosslinked anionic organic polymer with a size of greater than or equal to 1 micrometer and exhibiting an intrinsic viscosity of less than 3 dl/g.Type: GrantFiled: November 8, 2004Date of Patent: October 19, 2010Assignee: SNF S.A.S.Inventors: Gatien Faucher, Rene Hund, Christian Jehn-Rendu
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Patent number: 7776181Abstract: A novel retention aid is provided, which can realizes not only high retention but also excellent paper formation and is easy to use, in various papermaking processes. A composition for improving retention is provided, which comprises (A) a cationic water-soluble polymer and (B) an amphoteric water-soluble polymer. The component (A) preferably is a copolymer having a cation equivalent of 0.05 to 4.00 meq/g or one having a 0.5% salted viscosity of 30 to 200 mPa·s. The component (B) preferably is either a copolymer comprising a cationic radical-polymerizable monomer unit, an anionic radical-polymerizable monomer unit, and a nonionic radical-polymerizable monomer unit, or an amphoteric water-soluble polymer obtained by polymerizing a cationic radical-polymerizable monomer with an anionic radical-polymerizable monomer in the presence of a polysaccharide.Type: GrantFiled: December 28, 2005Date of Patent: August 17, 2010Assignee: Toagosei Co., Ltd.Inventors: Yoshio Mori, Koichi Adachi, Ken Takeda, Tetsuya Tsuzuki
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Patent number: 7767059Abstract: The invention relates to a flushable paper product comprising a fibrous substrate having (i) at least one strength region comprising a reacted cationic or a reacted nonionic strength agent and (ii) at least one dispersibility region, wherein the paper product has (a) a dispersibility of at least one tenth of a second, (b) a dry strength, and (c) a wet strength of at least about five percent of the dry strength.Type: GrantFiled: June 18, 2003Date of Patent: August 3, 2010Assignee: Kemira OyjInventors: Michael Ryan, David L. Dauplaise
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Publication number: 20100175842Abstract: A preparation of high strength paper by incorporating a polymeric film into the paper web during the paper making process is provided. The polymeric film is either a cold water soluble film or hot water soluble film or water insoluble hydrophilic film or non soluble non hydrophilic film or a combination of cold+hot+cold water soluble film or cold+hot water soluble film or cold+non soluble hydrophilic film or cold+non soluble hydrophilic film+cold water soluble film or cold+non soluble non hydrophilic film or cold+non soluble non hydrophilic film+cold water soluble film or slit strips of one or many of these combinations woven or intertwined offline and incorporated into the paper during the paper making process. Zone coating or discreet printing or zone extrusion striping or formation of hot water soluble film on preformed cold water soluble film which is then inserted into paper during the paper making process, thus using cold water soluble film as a carrier is also provided.Type: ApplicationFiled: March 22, 2006Publication date: July 15, 2010Applicant: Arrow Coated Products Ltd.Inventors: Shilpan Pravinchandra Patel, Nikita Kamlesh Thanawala
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Patent number: 7736466Abstract: This invention relates to a paper substrate containing high surface sizing and low internal sizing and having high dimensional stability, as well as methods of making and using the composition.Type: GrantFiled: January 17, 2007Date of Patent: June 15, 2010Assignee: International Paper CompanyInventors: Kapil Mohan Singh, Dennis W. Anderson, Peter M Froass, Yaoliang Hong, Krishna K Mohan, Thomas R Arnson, Yan C Huang
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Anionic functional promoter and charge control agent with improved wet to dry tensile strength ratio
Patent number: 7736465Abstract: The invention relates to a composition comprising (a) a functional promoter comprising a water-soluble anionic polymer having a molecular weight of at least about 50,000 daltons and a molecular weight charge index value of at least about 10,000; (b) a cationic surfactant component; such that when the composition treats a fibrous substrate, in conjunction with a cationic strength agent, the treated fibrous substrate exhibits (i) a ratio of wet tensile strength to dry tensile strength ranging from about 1:5 to about 1:2 and (ii) an increase in a ratio of wet tensile strength to dry tensile strength of at least about 10%, as compared to when the fibrous substrate is treated with the functional promoter and without a surfactant. The invention also relates to a paper product made with such a system, and method for imparting wet strength to a paper product with the functional promoter.Type: GrantFiled: February 6, 2004Date of Patent: June 15, 2010Assignee: Kemira OyjInventors: Michael Ryan, William Brevard -
Patent number: 7731820Abstract: The invention relates to a composition comprising a) at least one water-soluble fluorescent whitening agent, b) a polymer formed from an ethylenically unsaturated monomer or monomer blend, characterized in that at least one monomer is acrylamide and the water-soluble polymer has an average (weight average) molecular weight of between 500 and 49,000, optionally, c) polyethylene glycol with a weight average molecular weight of between 500 and 6000 and d) water and the use of the composition for the fluorescent whitening of paper in coating and size press or film press applications.Type: GrantFiled: October 17, 2005Date of Patent: June 8, 2010Assignee: Ciba Specialty Chemicals CorporationInventors: Robert Cockcroft, Ted Deisenroth, Peter Rohringer, Winfried Steffen
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Patent number: 7727359Abstract: A thermosetting resin comprising a reacted A) first partially crosslinked glyoxalated polymer comprising a reacted (i) first polyacrylamide backbone and (ii) a first glyoxal component; and B) a second crosslinked glyoxalated polymer comprising a reacted (i) second polyacrylamide backbone and (ii) a second glyoxyal component; such that the first polyacrylamide backbone has a molecular weight that is less than the molecular weight of the second polyacrylamide backbone; and the first polyacrylamide backbone and the second polyacrylamide backbone have a weight ratio ranging from 75:25 to 95:5. Methods for making and using the resin. Fibrous substrates made with the resin.Type: GrantFiled: July 27, 2009Date of Patent: June 1, 2010Assignee: Kemira OyjInventors: Robert Joseph Proverb, Lucyna M. Pawlowska
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Patent number: 7682488Abstract: A method of forming a cellulosic web is discussed, the product of which may, for example, possess at least one of increased softness, strength, and absorbency. The method measures the total anionic charge and controls the net charge of an aqueous stream.Type: GrantFiled: June 27, 2007Date of Patent: March 23, 2010Assignee: Georgia-Pacific Consumer Products LPInventors: Kang Chang Yeh, Gary L. Worry, Thomas N. Kershaw, Henry S. Ostrowski
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Patent number: 7678232Abstract: Synthetic co-polymers having moieties capable of forming hydrogen bonds, ionic bonds, or covalent bonds with cellulose fibers and paper modifying moieties capable of modifying a paper sheet are disclosed. These synthetic co-polymers are derived from the reaction of an aldehyde functional polymer and an aldehyde reactive paper modifying agent containing a non-hydroxyl aldehyde reactive functional group.Type: GrantFiled: June 14, 2007Date of Patent: March 16, 2010Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Thomas Gerard Shannon, Mike Thomas Goulet, Dana Stephanie Kass
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Publication number: 20100059191Abstract: A heat, grease, and cracking resistance release paper, said release paper is composed by 55% to 68% by weight of cellulose fiber, 3% to 6% by weight of one or more sizing agents, 27% to 37% by weight of one or more fillers, and 1% to 3% by weight of one or more binding agents.Type: ApplicationFiled: September 10, 2009Publication date: March 11, 2010Applicant: Copamex, S.A. De C.V.Inventors: ESTEBAN GARCIA MELGAREJO, FABIOLA RODRIGUEZ MATA
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Patent number: 7670460Abstract: A process for the production of paper which includes the steps of providing an aqueous suspension containing cellulosic fibers, and optional fillers; adding to the suspension: (a) at least one charged organic polymer; and (b) an aqueous sol containing silica-based particles; wherein the sol has: (i) an S-value within the range of from 10 to 45%; (ii) a viscosity within the range of from 5 to 40 cP; and (iii) a molar ratio of SiO2 to M2O, where M is alkali metal or ammonium, within the range of from 10:1 to 40:1; and (III) forming and draining the suspension on a wire.Type: GrantFiled: December 20, 2006Date of Patent: March 2, 2010Assignee: Akzo Nobel N.V.Inventors: Michael Persson, Marek Tokarz, Maj-Lis Dahlgren
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Patent number: 7670459Abstract: Fibrous products containing a durable softening agent are disclosed. The softening agent generally comprises a polysiloxane containing a plurality of first functional groups. In order to improve the wet retention of the softening agent on cellulosic fibers, the softening agent is reacted with a retention agent. The retention agent generally comprises a cationic polymer having a second functional group. In one embodiment, for instance, the softening agent contains epoxy groups or anhydride groups, while the retention agent contains amine groups. Products that may be made according to the present invention include tissue products, wipes and other absorbent articles.Type: GrantFiled: December 29, 2004Date of Patent: March 2, 2010Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Gil Bernard Didier Garnier, Michael Ralph Lostocco, Troy Michael Runge, Thomas Hampshire Schulz
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Patent number: 7641766Abstract: A method of enhancing the dewatering of a paper sheet on a paper machine comprising adding to the paper sheet about 0.05 lb/ton to about 15 lb/ton, based on dry fiber, of one or more aldehyde functionalized polymers comprising amino or amido groups wherein at least about 15 mole percent of the amino or amido groups are functionalized by reacting with one or more aldehydes and wherein the aldehyde functionalized polymers have a molecular weight of at least about 100,000.Type: GrantFiled: January 26, 2004Date of Patent: January 5, 2010Assignee: Nalco CompanyInventors: Michael R. St. John, Angel P. Zagala
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Publication number: 20090308553Abstract: The invention firstly discloses a new method for treating mineral materials, by means of an amphoteric polymer, to make said mineral materials effective as an agent for reducing the quantity of natural and organic colloids in the process of manufacturing a sheet of paper. A second object of the invention resides in the mineral materials thereby treated and obtained using the inventive method. The third, fourth, and fifth objects of the invention are the dry powders, aqueous suspensions, and granulated treated mineral materials obtained using the inventive method. A final object of the invention is the usage of said mineral materials treated using the inventive method as an agent for reducing the quantity of natural and organic colloids in the process for manufacturing sheets of paper.Type: ApplicationFiled: April 18, 2007Publication date: December 17, 2009Applicant: COATEX S.A.S.Inventors: Renaud Souzy, Christian Jacquemet, Jacques Mongoin
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Patent number: 7625462Abstract: Polymeric bonding agents having a “triggerable” bonding functionality and which are in the form of particles or fibers, are blended with papermaking fibers prior to formation of a tissue web. After the web is dewatered, and advantageously during or after drying, the triggerable bonding functionality is activated to strengthen the resulting sheet structure. Tissue sheets prepared in this manner can exhibit an improved combination of softness, bulk and strength.Type: GrantFiled: April 20, 2006Date of Patent: December 1, 2009Assignee: Kimberly-Clark Worldwide, Inc.Inventor: Kou-Chang Liu
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Patent number: 7589153Abstract: A method for making storage-stable glyoxalated inter-copolymers with higher and adjustable charge density suitable for use as a strengthening agent for paper. The glyoxalated inter-copolymers can be used to enhance the strength of paper, particularly recycled paper and mechanical printing paper.Type: GrantFiled: May 25, 2005Date of Patent: September 15, 2009Assignee: Georgia-Pacific Chemicals LLCInventors: Cornel Hagiopol, Yuping Luo, David F. Townsend, Clay E. Ringold, Karla D. Favors
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Patent number: 7585389Abstract: Fabric-creped absorbent sheet has an MD bending length of about 3.5 cm or more as well as an absorbency of about 3 g/g or more. The sheet is preferably produced without through drying or dry creping and is a low-dust product especially suitable for automatic towel dispensers.Type: GrantFiled: June 12, 2006Date of Patent: September 8, 2009Assignee: Georgia-Pacific Consumer Products LPInventors: Kang C. Yeh, Stephen J. McCullough, Hung Liang Chou, Mark S. Hunter, Thomas E. Lyse, Ronald R. Reeb
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Patent number: 7585388Abstract: Fabric-creped absorbent sheet has an MD bending length of about 3.5 cm or more as well as an absorbency of about 3 g/g or more. The sheet is preferably produced without through drying or dry creping and is a low-dust product especially suitable for automatic towel dispensers.Type: GrantFiled: June 12, 2006Date of Patent: September 8, 2009Assignee: Georgia-Pacific Consumer Products LPInventors: Kang C. Yeh, Stephen J. McCullough, Hung Liang Chou, Mark S. Hunter, Thomas E. Lyse, Ronald R. Reeb
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Publication number: 20090165978Abstract: Compositions comprising a blend of two or more paper strengthening agents have improved stability compared with previously known paper strengthening agents. One component is a polymeric paper strengthening agent, preferably a wet strengthening agent. The other component is a stabilized polyacrylamide prepared by (1) reacting a first portion of glyoxal with a polyacrylamide having pendant amide groups to form a first reaction mixture comprising polyacrylamide; (2) adding an acid to the first reaction mixture to form a second reaction mixture having a reduced pH and comprising the polyacrylamide; and (3) adding a second portion of glyoxal to the second reaction mixture to form the stabilized polyacrylamide. If desired, an aldehyde scavenger can be included in one or more of step (1), step (2), step (3), or the stabilized polyacrylamide. Such compositions can be used to enhance the strength of paper, particularly the wet strength of paper.Type: ApplicationFiled: November 21, 2008Publication date: July 2, 2009Applicant: Georgia-Pacific Chemicals LLCInventors: Cornel Hagiopol, Yuping Luo, David F. Townsend, James W. Johnston, Clay E. Ringold, Karla D. Favors
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Patent number: 7547376Abstract: The invention provides a paper quality improver for papermaking that allows improvement in the bulky value and the optical properties such as brightness and opacity as well as in the paper strength of a sheet obtained by papermaking a pulp material. The paper quality improver for papermaking is a paper quality improver for papermaking containing a copolymer (A) having a constituent unit derived from at least one nonionic monomer having a solubility parameter of 20.5 (MPa)1/2 or less and a constituent unit derived from at least one anionic or cationic monomer and a surfactant (B) at a certain ratio, the quality improver providing at least one paper quality improving effect of: (i) standard improved bulky value: 0.02 g/cm or more; (ii) standard improved opacity: 1.0 point or more; and (iii) standard improved brightness: 0.5 point or more.Type: GrantFiled: July 17, 2003Date of Patent: June 16, 2009Assignee: Kao CorporationInventor: Haruyuki Satoh
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Publication number: 20090065162Abstract: A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises sequential addition of high and low molecular weight flocculating agents to an aqueous dispersion of filler particles followed by shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution.Type: ApplicationFiled: September 12, 2007Publication date: March 12, 2009Inventors: Weiguo Cheng, Ross T. Gray
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Patent number: 7488403Abstract: Compositions comprising a blend of two or more paper strengthening agents have improved stability compared with previously known paper strengthening agents. One component is a polymeric paper strengthening agent, preferably a wet strengthening agent. The other component is a stabilized glyoxalated polyacrylamide prepared by (1) reacting a first portion of glyoxal with a polyacrylamide having pendant amide groups to form a first reaction mixture comprising glyoxalated polyacrylamide; (2) adding an acid to the first reaction mixture to form a second reaction mixture having a reduced pH and comprising the glyoxalated polyacrylamide; and (3) adding a second portion of glyoxal to the second reaction mixture to form the stabilized glyoxalated polyacrylamide. If desired, an aldehyde scavenger can be included in one or more of step (1), step (2), step (3), or the stabilized glyoxalated polyacrylamide. Such compositions can be used to enhance the strength of paper, particularly the wet strength of paper.Type: GrantFiled: August 17, 2004Date of Patent: February 10, 2009Inventors: Cornel Hagiopol, Yuping Luo, David F. Townsend, James W. Johnston, Clay E. Ringold, Karla D. Favors
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Patent number: 7473334Abstract: A method of preparing a modified diallyl-N,N-disubstituted ammonium halide polymer and use of the polymer in combination with one or more high molecular weight, water soluble cationic, anionic, nonionic, zwitterionic or amphoteric polymers for increasing retention and drainage in a papermaking furnish.Type: GrantFiled: October 15, 2004Date of Patent: January 6, 2009Assignee: Nalco CompanyInventors: Jane B. Wong Shing, Alessandra Gerli, Xavier S. Cardoso, Angela P. Zagala, Przem Pruszynski, Cathy C. Doucette
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Publication number: 20080308242Abstract: Storage-stable glyoxalated polyacrylamide polymers and high solids aqueous compositions formulated with them are described. These glyoxalated polyacrylamide compositions can be used as additives for papermaking, providing paper with good dry and temporary wet strength, and increasing papermaking de-watering rates.Type: ApplicationFiled: June 13, 2008Publication date: December 18, 2008Applicant: BUCKMAN LABORATORIES INTERNATIONAL, INC.Inventors: Chen Lu, James Drew Ward
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Publication number: 20080302498Abstract: Synthetic co-polymers having moieties capable of forming hydrogen bonds, ionic bonds, or covalent bonds with cellulose fibers and paper modifying moieties capable of modifying a paper sheet are disclosed. These synthetic co-polymers are derived from the reaction of an aldehyde functional polymer and an aldehyde reactive paper modifying agent containing a non-hydroxyl aldehyde reactive functional group.Type: ApplicationFiled: June 14, 2007Publication date: December 11, 2008Inventors: Thomas Gerard Shannon, Mike Thomas Goulet, Dana Stephanie Kass
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Patent number: 7459059Abstract: The invention discloses a paper or paperboard produced from a slurry comprising cellulose fibers and an effective amount of SMS. In addition, a method for increasing retention and dewatering during the papermaking process is also disclosed. The method involves the addition of an effective amount of SMS to said papermaking process.Type: GrantFiled: September 21, 2005Date of Patent: December 2, 2008Assignee: Nalco CompanyInventors: Bruce A. Keiser, Laura M. Sherman
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Patent number: 7442280Abstract: A process for the production of paper from a suspension containing cellulosic fibers, and optional fillers, which comprises adding to the suspension a drainage and retention aid comprising a cationic organic polymer, forming and dewatering the suspension on a wire, wherein the cationic organic polymer has an aromatic group and the suspension which is dewatered on the wire has a conductivity of at least 2.0 mS/cm.Type: GrantFiled: October 18, 2000Date of Patent: October 28, 2008Assignee: Akzo Nobel NVInventors: Bore Klemets, Hans Hallstrom, Anna Asplund, Rein Sikkar
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Patent number: RE42110Abstract: A method and composition are disclosed for providing a two-part polymer binder additive for a fibrous sheet for improving both its strength and durability. The two-part polymer binder may be added to augment organic binders to increase board strength and durability or to reduce the amount of organic binder required. The polymers may also be added in place of conventional organic binders or added in addition to organic binders to improve sag resistance and fibrous sheet performance.Type: GrantFiled: June 29, 2006Date of Patent: February 8, 2011Assignee: AWI Licensing CompanyInventors: Kenneth P. Kehrer, Sheldon M. Atlas, Helen Atlas, Victor A. Kabanov, Alexander Kabanov, Alexander Zezin, Valentine Rogachova