Nitrogen Containing Patents (Class 162/164.6)
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Patent number: 7932349Abstract: This invention relates to a process for preparing polyamine-epihalohydrin resins having reduced levels of residuals. The process comprises (a) charging a membrane separation apparatus with an aqueous composition comprising at least one polyamine-epihalohydrin resin, and (b) separating the aqueous composition into a permeate and a retentate by passing the aqueous composition through the membrane of the membrane separation apparatus. The retentate comprises at least one polyamine-epihalohydrin resin having lower levels of residuals on an equal active component basis than the aqueous composition of (a). The permeate comprises residuals removed from the aqueous composition of (a) and less than 5% by weight of the active component of said at least one polyamine-epihalohydrin resin. The polyamine-epihalohydrin resins having reduced levels of residuals can be used to make wet strength agents, dry strength agents, creping adhesives for paper products, curing agents for wood product adhesives, and other products.Type: GrantFiled: September 17, 2007Date of Patent: April 26, 2011Assignee: Hercules IncorporatedInventors: Richard J. Riehle, Steven Vinciguerra
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Publication number: 20110083821Abstract: The present invention is directed to a method for preparing a cellulose reactive adduct of polyvinylamide and a composition resulting from the method. The preparation of the cellulose reactive adduct is carried out close to a Critical Concentration defined herein. When the reaction is run close to this Critical Concentration, the risk of gelation is minimized, consumed glyoxal is maximized, and shelf live is enhanced. Additionally, the glyoxalated vinylamides of the present invention impart improved wet and dry strengthening efficiency to paper and paperboard when compared to adducts disclosed in previously described art.Type: ApplicationFiled: December 16, 2010Publication date: April 14, 2011Inventor: Matthew D. Wright
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Patent number: 7922867Abstract: Process for the production of paper, board and cardboard having high dry strength by separate addition of a polymer comprising vinylamine units and of ligninsulfonic acid and/or a ligninsulfonate to a paper stock, draining of the paper stock and drying of the paper products.Type: GrantFiled: March 9, 2007Date of Patent: April 12, 2011Assignee: BASF SEInventors: Norbert Schall, Ellen Krueger, Martin Ruebenacker
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Publication number: 20110079365Abstract: The use of water-soluble, amphoteric copolymers which are obtainable by copolymerization of a) at least one N-vinylcarboxamide of the general formula in which R1 and R2, independently of one another, are H or C1- to C6-alkyl, b) at least one monomer which is selected from the group consisting of (b1) monoethylenically unsaturated sulfonic acids, phosphonic acids, phosphoric acid esters and derivatives thereof, and (b2) monoethylenically unsaturated mono- and dicarboxylic acids, the salts thereof and dicarboxylic anhydrides, c) if appropriate, at least one monoethylenically unsaturated monomer differing from the components (a) and (b), and d) if appropriate, at least one compound which has at least two ethylenically unsaturated double bonds in the molecule, with the proviso that the monomer mixture comprises at least one monomer (b) having at least one free acid group and/or an acid group in salt form, and subsequent partial or complete hydrolysis of the groups —CO—R1 from the monomersType: ApplicationFiled: June 9, 2009Publication date: April 7, 2011Applicant: BASF SEInventors: Hans-Joachim Haehnle, Anton Esser
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Publication number: 20110065840Abstract: The present invention relates to a dispersion comprising (i) at least one liquid polymer and (ii) at least one polymer particle mixture comprising at least one meltable solid and at least one copolymer (C), wherein said at least one copolymer (C) is a random copolymer synthesized from at least one ?,?-ethylenically unsaturated monomer and at least one polymerizable polymer of the class of liquid polymers according to (i), to processes for preparing this dispersion, to the use of this dispersion to prepare polyurethanes, and to a process for preparing polyurethanes, in which at least one such dispersion is reacted with at least one polyisocyanate.Type: ApplicationFiled: May 11, 2009Publication date: March 17, 2011Applicant: BASF SEInventors: Daniel Freidank, Andreas Emge, Sonja Judat, Robert Engel, Ingrid Martin, Thomas Danner, Achim Loeffler, Stephan Hess
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Publication number: 20110056635Abstract: There is provided a fiberboard, such as a MDF fiberboard or a HDF fiberboard, comprising wood fibers, a binder, and a sludge such as a pulp and a paper sludge. The sludge can be, for example, chosen from a primary pulp and paper sludge, a secondary pulp and paper sludge, a de-inking sludge, and mixtures thereof.Type: ApplicationFiled: October 21, 2010Publication date: March 10, 2011Inventors: Yves CHAREST, André VERVILLE
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Publication number: 20110048659Abstract: According to the disclosure, a process of making a wet formed cellulosic product and a wet formed cellulosic product are disclosed. The process includes providing a slurry, forming the slurry into a cellulosic product, dewatering the cellulosic product, drying the cellulosic product, and applying an additive to one or more of the slurry and the cellulosic product. The additive modifies one or more of bulk, charge, potential, cumulative pore volume, surface tension of the cellulosic product.Type: ApplicationFiled: September 1, 2010Publication date: March 3, 2011Applicants: ARMSTRONG WORLD INDUSTRIES, INC., THE UNIVERSITY OF MAINE SYSTEM BOARD OF TRUSTEESInventors: James J. BEAUPRE, David J. NEIVANDT, Kenneth P. KEHRER
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Publication number: 20110048660Abstract: Process for the production of paper, board and cardboard having high dry strength by separate addition of a water-soluble cationic polymer and of an aqueous dispersion of a water-insoluble polymer having a content of acid groups of not more than 10 mol % or of an aqueous dispersion of a nonionic polymer, which dispersion has been made anionic, to a paper stock, draining of the paper stock and drying of the paper products. Preferably, the polymers are added to a paper stock which has a temperature of at least 40° C.Type: ApplicationFiled: May 14, 2009Publication date: March 3, 2011Applicant: BASF SEInventors: Anton Esser, Hans-Joachim Haehnle
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Publication number: 20110042021Abstract: The invention relates to a wood composition containing olefin and raw wood materials, the use of said olefins for rendering raw wood materials water repellent, and a method for producing wood materials therefrom. The raw wood materials contain or are made of lignocellulose and are provided in the form of fibers, strands, or chips.Type: ApplicationFiled: February 25, 2009Publication date: February 24, 2011Applicant: SASOL WAX GMBHInventors: Thomas Buchholz, Gernot Meyer, Marc Prüsmann
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Publication number: 20110036526Abstract: The specification discloses a method for making a paper material having a reduced tendency to cut human skin. The method includes providing a papermaking furnish containing cellulosic fibers and from about 0.5 to about 5.0 wt % by weight dry basis expandable microspheres, forming a paperboard web from the papermaking furnish, drying the web, and calendaring the web to a caliper of from about 11.0 to about 18.0 mils and a density ranging from about 7.0 to about 12.0 lb/3000 ft2/mil. Papers formed according to the method and articles formed therefrom are also disclosed.Type: ApplicationFiled: August 19, 2010Publication date: February 17, 2011Applicant: INTERNATIONAL PAPER COMPANYInventors: RICHARD C. WILLIAMS, PETER M. FROASS, DAVID A. BOONE, RICHARD D. FABER
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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: 7875150Abstract: A new class of polymeric additives for papermaking is disclosed as well as a process for their manufacture, a method for their use and a paper sheet containing the addition. The additives can be used in paper manufacture as agents for improving retention, paper machine operation and the strength properties of the product. The additives are manufactured from a microbial biomass. The biomass that contains acetyl amino groups or other amides is chemically modified by hydrolysis of the amides to form primary amino groups. Under neutral or acidic conditions these primary amines become cationic, which assures a good absorption of the additive onto fibres and fines of pulp that is generally of anionic nature.Type: GrantFiled: May 19, 2005Date of Patent: January 25, 2011Assignee: FPInnovationsInventors: Miroslav Antal, Peter Volf, Ivan I. Pikulik, Makhlouf Laleg, Jan Martin Strmen, Jarka Matous
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Publication number: 20100326615Abstract: Enhancement of papermaking drainage and retention properties of aqueous cellulosic suspensions used for production of paper or paper board with a retention/drainage additive system including high solids glyoxalated polyacrylamide polymers in combination with silicon-containing microparticles is described.Type: ApplicationFiled: June 25, 2010Publication date: December 30, 2010Applicant: BUCKMAN LABORATORIES INTERNATIONAL, INC.Inventor: Chen Lu
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Publication number: 20100326614Abstract: A cationic copolymers of acrylamide obtained by the Hofmann rearrangement, using an alkali and/or alkaline earth hydroxide and an alkali and/or alkaline earth hypohalide, are provided. The copolymers can be used as strengthening agents for paper and/or coagulants. The copolymers have a desalination coefficient (Cd) higher than 0.6, higher than 0.65, or higher than 0.7.Type: ApplicationFiled: February 19, 2008Publication date: December 30, 2010Applicant: SNF S.A.S.Inventors: René Hund, Christian Jehn-Rendu
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Publication number: 20100314061Abstract: A method for manufacturing a sheet of paper from a pulp and a sheet of paper obtained by the present method, wherein said pulp comprises a mixture of natural and/or synthetic fibers, water, and at least one aqueous suspension and/or dispersion comprising at least one mineral material, wherein said dispersion or suspension comprises, as a steric dispersing agent of at least one mineral material, at least one copolymer comprising at least one vinylic monomer, at least one non-ionic monomer, or a mixture of several monomers having formula (I) in the present method, wherein said agent limits the presence of divalent ions in the aqueous phase and said agent is not a chelating agent.Type: ApplicationFiled: October 10, 2007Publication date: December 16, 2010Applicant: COATEX S.A.S.Inventors: Olivier Guerret, Francois Dupont, Jacques Mongoin
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Publication number: 20100300633Abstract: The present invention provides methods for producing a base paper for coated printing paper and a coated paper by neutral papermaking using a roll and blade gap former type paper machine including a drainage mechanism based on a drainage blade immediately downstream of initial drainage via a forming roll, comprising adding a cationic polyacrylamide-based material having a weight-average molecular weight of 10,000,000 or more determined by intrinsic viscosity measurement as a retention aid to a stock to convert it into paper. According to the present invention, the retention, formation and internal bond strength of the stock can be improved. In the present invention, an anionic microparticle and/or a coagulant can also be used.Type: ApplicationFiled: March 31, 2008Publication date: December 2, 2010Applicant: NIPPON PAPER INDUSTRIES CO., LTD.Inventors: Shisei Goto, Takashi Yamaguchi, Tsukasa Oba, Masaki Ito, Koji Okomori
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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: 20100282424Abstract: A method for the production of paper, cardboard and card by adding a microparticle system consisting of a polymer retention agent having a molar mass Mw of at least 2 million and a fine-part inorganic component in order to form a paper material having a material density of a 20 g/l maximum and by dewatering the paper material, wherein the paper material undergoes at least one shearing step prior to or after addition of the retention agent and wherein the retention agent is introduced in a dosed manner into the paper material in at least two places and the fine inorganic component is dosed prior to or after addition of the retention agent or between two dosing points for the retention agent.Type: ApplicationFiled: December 17, 2005Publication date: November 11, 2010Applicant: BASF AKTIENGESELLSCHAFTInventors: Oliver Koch, Frank Prechtl, Rainer Blum, Detlef Kannengiesser
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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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Publication number: 20100279061Abstract: The present invention relates to a machine for fabricating a medium for abrasive-coated grinding material, wherein at least one continuous reinforcing element in the form of a tape or a yarn is introduced continuously during wet formation of the medium.Type: ApplicationFiled: November 26, 2008Publication date: November 4, 2010Applicant: Arjowiggins ArchesInventor: Thierry Mayade
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Publication number: 20100263818Abstract: Compositions and methods of producing an optically-enhanced paper-based material are disclosed. The composition can include an optical brightening agent and an additive having an aromatic portion, where the aromatic portion is associated with an optical brightening agent. The paper-based material can exhibit a higher capacity for the optical brightening agent relative to a paper-based material that lacks the additive. Techniques for increasing optical brightening agent retention in a paper-based material are also disclosed. The techniques include using an additive having an aromatic portion, where the aromatic portion associates with an optical brightening agent so that the retention of the optical brightening agent is improved.Type: ApplicationFiled: April 16, 2010Publication date: October 21, 2010Applicant: NanoPaper, LLCInventors: Lynn Reis, Gangadhar Jogikalmath, David S. Soane
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Publication number: 20100252771Abstract: The invention relates to a sizing composition intended to be applied to mineral fibers, especially glass or rock fibers, which contains at least one polycarboxylic acid and at least one polyamine. It also relates to a method of preparing said composition, to its use for sizing mineral fibers for the purpose of forming, in particular, thermal and/or acoustic insulation products, and to the products obtained.Type: ApplicationFiled: June 21, 2010Publication date: October 7, 2010Applicant: SAINT-GOBAIN ISOVERInventors: Philippe ESPIARD, Marc Dolatkhani, Anne Pagnoux, Francois Boyer
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Publication number: 20100226874Abstract: Embodiments of the present subject matter provide a biocidal composition comprising an aqueous mixture of (a) a phosphonium compound and (b) a polymeric ammonium compound, wherein the weight ratio of compound (a) to compound (b) is from 0.2:1 to 20:1, and wherein the phosphonium compound (a) has formula: wherein each R is independently a C1-C6 alkyl group which is unsubstituted or substituted by a cyano, hydroxyl, esterified hydroxyl or aryl group; R1 represents a C8-C18 alkyl group which is substituted or unsubstituted; and X represents either chlorine or bromine; and wherein the polymeric ammonium compound (b) comprises the repeat unit: wherein each R2 is independently a C1-C2 alkyl group which is substituted or unsubstituted; R3 represents a C2-C18 alkyl or alkenyl group which is substituted or unsubstituted; and R4 represents a C2-C18 alkyl or alkenyl group which is substituted or unsubstituted, a diethyl ether group, an isopropanol group,a N,N-dipropylurea group, or a 2-butene group.Type: ApplicationFiled: March 6, 2009Publication date: September 9, 2010Inventors: Jeffrey Kramer, Suresh Patel, Sylvie Gascoigne
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Patent number: 7776182Abstract: Selected chlorohydrin and cationic compounds containing nitroxide or hydroxylamine moieties are effective in stabilizing pulp or paper, especially pulp or paper containing lignin, against yellowing and discoloration due to the adverse effects of light. These compounds are added at various points in the paper-making process, especially at the wet ends, making the need for water soluble or water dispersible materials having high affinity for pulp or paper essential. This performance is often further enhanced by the presence of one or more coadditives selected from the group consisting of the UV absorbers, the polymeric inhibitors, the nitrones, the fluorescent whitening agents and metal chelating agents. Combinations of hydroxylamines or their salts, benzotriazole or benzophenone UV absorbers and a metal chelating agent are particularly effective.Type: GrantFiled: November 8, 2007Date of Patent: August 17, 2010Assignee: Ciba Specialty Chemicals CorporationInventors: Glen T. Cunkle, David Devore, Thomas F. Thompson
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Publication number: 20100200185Abstract: To provide a papermaking internal sizing agent capable of efficiently imparting sizing performance even in neutral papermaking which uses calcium carbonate as filler, and uses no aluminum sulfate or uses a small amount of aluminum sulfate, and also provide a paper or a paperboard obtained by using the papermaking internal sizing agent. The papermaking internal sizing agent comprises as an effective ingredient an amphoteric copolymer having hydrophobic groups and cationic groups, at least a part of the cationic groups being quaternized. Preferably, the amphoteric copolymer is obtained by polymerizing monomer ingredients that it essentially contain a hydrophobic monomer (A), a cationic monomer (B), and an anionic monomer (C) and that an anion equivalent of the monomer (C) is 0.1 to 90% of a cation equivalent of the monomer (B), in which a rate of quaternizing of the cationic groups is not less than 40% by mole. The paper or the paperboard contains the above papermaking internal sizing agent.Type: ApplicationFiled: March 6, 2008Publication date: August 12, 2010Inventors: Kazunari Sakai, Takahiro Fujiwara, Kazushige Inaoka
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Publication number: 20100193148Abstract: 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.Type: ApplicationFiled: January 29, 2010Publication date: August 5, 2010Inventors: Jonathan M. McKay, Qu-Ming Gu, Richard J. Riehle
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Publication number: 20100186914Abstract: A cationic copolymer is obtained by the Hofmann rearrangement (also referred to as the Hofmann degradation reaction) in aqueous solution in the presence of an alkaline-earth and/or alkali hydroxide and an alkaline-earth and/or alkaline hypohalide, on a base copolymer comprising at least one nonionic monomer selected from the group comprising acrylamide (and/or methacrylamide), N,N-dimethylacrylamide and/or acrylonitrile The copolymer is branched after the Hofmann rearrangement, in the presence of at least one polyfunctional branching agent, and is soluble in water.Type: ApplicationFiled: July 11, 2008Publication date: July 29, 2010Applicant: SNF SASInventors: Christian Jehn-Rendu, Rene Hund, Muttalif Duong
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Patent number: 7740742Abstract: The powder composition for paper manufacturing of the invention contains a hydrophobic organic compound (A), an emulsifying and dispersing agent (B), and optionally water-soluble saccharides (C) added based on necessity and has an average particle diameter of 0.1 to 2,000 ?m.Type: GrantFiled: July 29, 2004Date of Patent: June 22, 2010Assignee: Kao CorporationInventors: Yoshihito Hamada, Kazuo Kubota, Atsushi Hiraishi, Jun Kozuka, Takahiro Kawaguchi, Tsutomu Miyahara, Hiroshi Noro, Koichi Ohori, Haruyuki Sato
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Publication number: 20100147475Abstract: 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: ApplicationFiled: December 1, 2005Publication date: June 17, 2010Applicant: BASF AktiengesellschaftInventors: Oliver Koch, Rainer Blum, Ron Van Dijk
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Publication number: 20100147477Abstract: Provided is thermosetting urea-formaldehyde (UF) resin binder formulation modified with a thickener. The formulation preferably has a viscosity in the range of from 3 to 10 cP and a surface tension of from 35 to 50 mN/m, and is preferably prepared from a binder composition exhibiting a viscosity of from 175 to 250 cP.Type: ApplicationFiled: February 22, 2010Publication date: June 17, 2010Inventors: Souvik Nandi, Guodong Zheng, Jawed Asrar, Philip Francis Miele
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Publication number: 20100147476Abstract: Disclosed herein are hydrophobically-modified 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. In particular, poly(aminoamides) 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.Type: ApplicationFiled: November 18, 2009Publication date: June 17, 2010Inventors: Qu-Ming GU, Lloyd A. Lobo, Erin A. S. Doherty, Huai N. Cheng
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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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Publication number: 20100139879Abstract: The invention is directed to a method of making ultra high molecular weight diallyldialkyl ammonium salt homopolymers, compositions thereof and use of compositions as a fixative in papermaking.Type: ApplicationFiled: February 18, 2010Publication date: June 10, 2010Inventors: ZHIQIANG SONG, George William Schriver, Holger Reinicke
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Publication number: 20100137453Abstract: A thixotropic agent comprising a first polyurea reaction product of a first polyisocyanate with a first amine and a second polyurea reaction product of a second polyisocyanate with a second amine different from the first polyurea reaction product precipitated in the presence of the colloidal particles of the first reaction product.Type: ApplicationFiled: June 28, 2006Publication date: June 3, 2010Applicant: Nuplex Resins B.V.Inventor: Richard Hendrikus Gerrit Brinkhuis
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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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Publication number: 20100126684Abstract: The invention provides a method of producing paper with a higher proportion of mineral filler particles than is otherwise be possible without the expected loss in paper strength. The method allows for the use of the greater amount of filler particles by coating at least some of the filler particles with a material that prevents the filler materials form adhering to a strength additive. The strength additive holds the cellulose fibers together tightly and is not wasted on the filler particles. The method is particularly effective when the filler particles are a PCC-GCC blend and when the GCC particles are coated with the adherence preventing coating.Type: ApplicationFiled: November 26, 2008Publication date: May 27, 2010Inventors: Weiguo Cheng, Jun Li, Yulin Zhao, Oing Long Rao
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Patent number: 7708862Abstract: Use of silica sols containing sulfonic acid groups and/or mercapto groups as microparticles in paper production, in particular for paper retention.Type: GrantFiled: June 30, 2004Date of Patent: May 4, 2010Assignee: Kemira OyjInventors: Karlheinrich Meisel, Bernd Thiele, Gerd-Friedrich Renner, Johan Kijlstra, Arno Nennemann, Thomas Hübbe, Lothar Puppe
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Publication number: 20100105272Abstract: Provided is thermosetting urea-formaldehyde (UF) resin binder formulation, preferably prepared with modified styrene-maleic anhydride. The formulation has a viscosity in the range of from 3 to 10 cP and a surface tension of from 35 to 50 mN/m, and is prepared using a UF resin composition exhibiting a viscosity of from 175 to 250 cP.Type: ApplicationFiled: December 30, 2009Publication date: April 29, 2010Inventors: Souvik Nandi, Guodong Zheng, Jawed Asrar, Philip Francis Miele
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Publication number: 20100089542Abstract: 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: ApplicationFiled: December 14, 2009Publication date: April 15, 2010Inventors: Michael R. St. John, Angel P. Zagala
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Publication number: 20100089541Abstract: A process of making filled paper comprising the steps of providing a thick stock cellulosic suspension that contains mechanical pulp and filler, diluting the thick stock suspension to form a thin stock suspension, in which the filler is present in the thin stock suspension in an amount of at least 10% by weight based on dry weight of thin stock suspension, flocculating the thick stock suspension and/or the thin stock using a polymeric retention/drainage system, draining the thin stock suspension on a screen to form a sheet and then drying the sheet, in which the polymeric retention/drainage system comprises, i) a water-soluble branched anionic polymer and ii) a water-soluble cationic or amphoteric polymer. The process is particularly suitable for making filled mechanical grade paper, such as SC grade paper. The process enables the separation of retention and drainage parameters, especially useful for fast draining paper machines, such as Gapformers.Type: ApplicationFiled: January 21, 2008Publication date: April 15, 2010Inventor: Holger Reinicke
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Publication number: 20100084103Abstract: A process of making paper or paperboard with improved ash retention relative to total retention comprising the steps of providing a thick stock cellulosic suspension that contains filler, diluting the thick stock suspension to form a thin stock suspension, in which the filler is present in the thin stock suspension in an amount of at least 10% by weight based on dry weight of thin stock suspension, flocculating the thick stock suspension and/or the thin stock using a polymeric retention/drainage system, draining the thin stock suspension on a screen to form a sheet and then drying the sheet, in which the polymeric retention/drainage system comprises, i) a water-soluble branched anionic polymer and ii) a water-soluble cationic or amphoteric polymer, wherein the anionic polymer is present in the thick stock or thin stock suspension prior to the addition of the cationic or amphoteric polymer. The process brings about improved ash retention relative to total retention.Type: ApplicationFiled: January 22, 2008Publication date: April 8, 2010Applicant: BASF SE, 67056Inventor: Holger Reinicke
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Publication number: 20100078930Abstract: The present invention relates to a crumple-resistant security sheet comprising fibers; an anionic polymer in a proportion lying in the range 5% to 45% by dry weight relative to the total dry weight of the fibers, and presenting a glass transition temperature greater than 40° C.; and a main cationic flocculation agent in a quantity lying in the range 1% to 5% by dry weight relative to the total dry weight of the fibers.Type: ApplicationFiled: May 28, 2008Publication date: April 1, 2010Applicant: ARJOWIGGINS SECURITYInventor: Henri Rosset
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Publication number: 20100071863Abstract: 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.Type: ApplicationFiled: September 18, 2009Publication date: March 25, 2010Applicants: Hercules Inc., Specialty Minerals (Michigan) Inc.Inventors: Frank J. Sutman, Joseph M. Mahoney, Robert Anthony Gill, Daniel Bruce Evans
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Patent number: 7683121Abstract: A method of stabilizing an aqueous solution of polyaminoamide-epichlorohydrin resin comprising sequentially adding to the solution about 0.1 to about 10 weight percent of one or more strong acids and about 0.1 to about 10 weight percent of one or more weak acids to prepare a stabilized solution having a pH of about 3-4.Type: GrantFiled: March 28, 2005Date of Patent: March 23, 2010Assignee: Nalco CompanyInventors: Mingli Wei, Vladimir A. Grigoriev, Gary S. Furman, Jr., William J. Ward
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Patent number: 7678228Abstract: Topically-applied binder materials for imparting wet strength to soft, absorbent paper sheets, such as are useful as household paper towels and the like, include an azetidinium-reactive polymer, such as a carboxyl-functional polymer, an azetidinium-functional polymer and, optionally, a component useful for reducing sheet-to-sheet adhesion (blocking) in the product. These binder materials can be cured at ambient temperature over a period of days and do not impart objectionable odor to final product when wetted.Type: GrantFiled: September 17, 2007Date of Patent: March 16, 2010Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Mike Thomas Goulet, Tracy Ho Mathews, Stacey Lynn Pomeroy, Maurizio Tirimacco
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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: 7666273Abstract: This invention relates to a process for preparing sized paper and paperboard which incorporates in the paper and paperboard at the size press size a composition comprising one or more “hydrophobic polymers” wherein hydrophobic polymers, the amount of such polymers and the weight ratio of starch to such polymer in the composition are selected such that the paper and paper board exhibits a Cobb Value equal to or less than about 25 and to a sized paper or paperboard web formed by the process.Type: GrantFiled: July 2, 2008Date of Patent: February 23, 2010Assignee: International Paper CompanyInventors: Richard C Williams, Peter M Froass, Sandeep Kulkarni
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Publication number: 20100038046Abstract: The invention consists in the use, in a method for manufacturing a sheet of paper, of an aqueous suspension and/or dispersion of mineral materials as an agent for slowing the penetration of the paper coating into said sheet, characterized in that said suspension and/or dispersion contains at least one water-soluble copolymer made up of at least one ethylenically-unsaturated anionic monomer, and at least one ethylenically-unsaturated oxylalkylated monomer terminated by a hydrophobic chain. It also consists in a method for manufacturing a sheet of paper which implements said copolymer, as well as the sheet of paper obtained.Type: ApplicationFiled: October 3, 2007Publication date: February 18, 2010Applicant: COATEX S.A.S.Inventors: Jacques Mongoin, Francois Dupont, Hubert Parant, Jean-Marc Suau
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Publication number: 20100000694Abstract: The invention relates to a method for the production of flat paper products with increased relative wet tensile strength and softness from a pulp suspension in which a block copolymer is added to the pulp suspension and/or the paper product is treated during production thereof or subsequently with the block copolymer. The invention likewise relates to a paper product produced in this manner. Paper products of this type are used in particular as tissue products.Type: ApplicationFiled: July 30, 2007Publication date: January 7, 2010Applicants: FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG e.V., SCA HYGIENE PRODUCTS GMBHInventors: Joachim Storsberg, André Laschewsky, Stephan Eichhorn, Siegfried Stapel
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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