Nitrogen Containing Patents (Class 162/164.6)
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Publication number: 20120118520Abstract: The present invention provides a method for easily and efficiently manufacturing microfibrous cellulose composite sheets. The present invention is a method for manufacturing microfibrous cellulose composite sheets, including a preparation process in which a polymer emulsion is mixed with an aqueous suspension including microfibrous cellulose, thereby preparing a mixed fluid, a papermaking process in which the mixed fluid is dehydrated on a porous base material through filtration, and a sheet including moisture is formed, and a drying process in which the sheet including moisture is heated and dried. In addition, the present invention is a method for manufacturing a microfibrous cellulose composite sheet laminate, in which the microfibrous cellulose sheets are thermally compressed and thus laminated as they are or after being provided with a polymer layer on at least one surface thereof.Type: ApplicationFiled: July 22, 2010Publication date: May 17, 2012Applicant: OJI PAPER CO., LTD.Inventors: Yasutomo Noishiki, Takashi Kawamukai, Mitsuru Tsunoda, Yoshiyuki Asayama
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Publication number: 20120118523Abstract: A dry strength additive composition generally includes an anionic and/or amphoteric polyacrylamide having a molecular weight of less than 1,000,000 Daltons, wherein the amphoteric polyacrylamide has a net negative charge; a cationic and/or amphoteric starch; and a cationic non-starch polymer having a charge density greater than 1 milliequivalent per gram (meq/g) at a pH of 3. The components defining the composition can be added to a pulp suspension sequentially or as a pre-blended mixture.Type: ApplicationFiled: November 15, 2010Publication date: May 17, 2012Applicant: KEMIRA OYJInventors: Chen Lu, Vladimir Grigoriev, Scott Rosencrance
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Patent number: 8172983Abstract: 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: GrantFiled: September 12, 2007Date of Patent: May 8, 2012Assignee: Nalco CompanyInventors: Weiguo Cheng, Ross T. Gray
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Publication number: 20120103549Abstract: 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 ionic crosslinked acrylic acid-acrylate copolymer microparticles is described. Paper and paperboard products made with these copolymer microparticles are also described.Type: ApplicationFiled: October 26, 2011Publication date: May 3, 2012Applicant: BUCKMAN LABORATORIES INTERNATIONAL, INC.Inventor: Weiping Ban
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Publication number: 20120103548Abstract: The invention provides a method of improving dewatering efficiency, increasing sheet wet web strength, increasing sheet wet strength and enhancing filler retention in a papermaking process The method improves the efficiency of drainage aids or wet web strength aids or wet strength aid by coating at least some of the filler particles with a material that prevents the filler materials form adhering to a those additives. The drainage additive or wet web strength additive or wet strength aid holds the cellulose fibers together tightly and is not wasted on the filler particles.Type: ApplicationFiled: October 13, 2011Publication date: May 3, 2012Inventors: Yulin ZHAO, Jun LI, Qing Long RAO, Weiguo CHENG
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Patent number: 8168040Abstract: 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: GrantFiled: January 22, 2008Date of Patent: May 1, 2012Assignee: BASF SEInventor: Holger Reinicke
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Patent number: 8152961Abstract: This invention relates to paper products and/or substrates suitable for being made and/or converted into wallboard tape; which also may be known as joint tape and/or drywall tape, having a pH of at least 7.0 and containing a plurality of cellulose fibers, a wet strength additive, an alkaline sizing agent, and an anionic promoter, as well as methods of making and using the same.Type: GrantFiled: August 19, 2010Date of Patent: April 10, 2012Assignee: International Paper CompanyInventors: Stephen A. Buzza, Dennis W. Anderson, Yufeng Xu, Bruce Richard McGaffin, Christopher Michael Wilson
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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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Publication number: 20120080157Abstract: A degrading agent composition for use in manufacturing a tissue product generally includes a degrading agent, a degradation inhibiting carrier, and a non-ionic surfactant. The non-ionic surfactant stabilizes the viscosity of the composition as a function of time. The degrading agent composition can be used in combination with a temporary wet strength agent to produce a tissue product exhibiting high initial wet tensile strength and desirable decay properties. Processes for forming the tissue product and pumpable fluids containing the degrading agent composition are also disclosed.Type: ApplicationFiled: September 30, 2010Publication date: April 5, 2012Applicant: KEMIRA OYJInventors: Scott Rosencrance, Yuping Luo, Vladimir Grigoriev
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Publication number: 20120073774Abstract: A process for reducing deposits in the dry section in the production of paper, board and cardboard by adding (a) at least one water-soluble cationic polymer and (b) at least one aqueous dispersion of a polymer size to a paper stock, draining the paper stock with sheet formation and drying the paper products.Type: ApplicationFiled: June 11, 2010Publication date: March 29, 2012Applicant: BASF SEInventors: Christian Jehn-Rendu, Geert Andre Leon Vanhyfte
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Publication number: 20120073773Abstract: Process for the production of paper, board and cardboard having high dry strength by addition of (a) at least one trivalent cation in the form of a salt, (b) at least one water-soluble cationic polymer and (c) at least one water-soluble amphoteric polymer to the paper stock, draining of the paper stock with sheet formation and subsequent drying of the paper products, the water-soluble cationic polymer (b) being selected from the group consisting of the (i) polymers comprising vinylamine units and (ii) polymers comprising ethylenimine units.Type: ApplicationFiled: June 7, 2010Publication date: March 29, 2012Applicant: BASF SEInventors: Christian Jehn-Rendu, Ellen Krueger, Hans-Joachim Haehnle, Martin Ruebenacker, Norbert Schall, Thomas Muehlenbernd
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Publication number: 20120067534Abstract: 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: November 22, 2011Publication date: March 22, 2012Applicant: BASF SEInventors: Suleman Buwono, Gary Reddihough, Jozef Maria Leonardus Dogge
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Publication number: 20120067535Abstract: 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: November 22, 2011Publication date: March 22, 2012Applicant: BASF SEInventors: Suleman Buwono, Gary Reddihough, Jozef Maria Leonardus Dogge
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Publication number: 20120064295Abstract: Cured non-woven fibrous mats, UF-based resinous binders, asphalt coated roofing material and processes for making cured non-woven fibrous mats are provided. A cured non-woven fibrous mat comprising randomly disposed fibers bound together with a resinous adhesive is provided. The mat has a caliper of less than 30 mil, an LOI of less than 18 wt. %, a hot tensile strength of at least about 60 lbs for a sample width of 2.5 inches, and an areal weight of equal to or less than about 1.8 lbs/100 ft2.Type: ApplicationFiled: September 10, 2010Publication date: March 15, 2012Inventors: Michael W. Klett, Nancy E. Brown
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Publication number: 20120055643Abstract: Polymer-containing articles of manufacture that provide one or more superior properties, such as soil adsorption properties, mirror cleaning properties, and/or absorption properties, compared to known polymer-containing articles of manufacture, are provided.Type: ApplicationFiled: September 1, 2011Publication date: March 8, 2012Inventors: Charles William Neal, Charles Allen Redd, Jeffrey Glen Sheehan, Steven Daryl Smith, Robert Joseph McChain
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Publication number: 20120017808Abstract: A fluff pulp or other pulp, comprises a multivalent cationic metal ion selected from the group consisting of Al+3, B+3, Mn+2, Cu+2, Cu+3, Zn+2, Sn+2, Sn+4, water-soluble salt thereof, or combination thereof; an amine-containing anti-static agent; and pulp. Methods of making and using the pulp, as well as articles therefrom, are provided.Type: ApplicationFiled: July 18, 2011Publication date: January 26, 2012Applicant: INTERNATIONAL PAPER COMPANYInventors: JAMES E. SEALEY, PETER M. FROASS, SYLVIE MARIE RITA CARRIERE
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Patent number: 8101046Abstract: 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: GrantFiled: March 31, 2008Date of Patent: January 24, 2012Assignee: Nippon Paper Industries, Co. Ltd.Inventors: Shisei Goto, Takashi Yamaguchi, Tsukasa Oba, Masaki Ito, Koji Okomori
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Patent number: 8101710Abstract: 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: April 25, 2011Date of Patent: January 24, 2012Assignee: Hercules IncorporatedInventors: Richard J. Riehle, Stephen Vinciguerra
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Patent number: 8097125Abstract: The invention relates to a composition comprising a (a) a temporary wet strength agent component capable of forming hemi-acetal bonds with the fibers of a tissue web to provide initial wet strength, subsequent rapid degradation of the initial wet strength when the tissue web contacts water; and (b) a sizing agent component capable of imparting water-repelling properties to the tissue web; such that the strength agent component and the sizing agent component are present in sufficient amounts so that when the composition is added to a tissue pulp slurry during a tissue-making process, tissue made from the tissue-making process exhibits a combination of (i) improved initial wet tensile, (ii) improved decay, and (iii) absorbency.Type: GrantFiled: September 26, 2005Date of Patent: January 17, 2012Assignee: Kemira Chemicals, Inc.Inventors: Michael Ryan, David Dauplaise, William Brevard
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Patent number: 8097126Abstract: The present invention relates to an aqueous composition comprising at least one finely divided filler and at least one water-soluble amphoteric copolymer, a process for the preparation of such a composition and its use as an additive in the production of paper, cardboard and board.Type: GrantFiled: July 15, 2005Date of Patent: January 17, 2012Assignee: BASF SEInventors: Hans-Joachim Haehnle, Anton Esser, Volker Braig, Rainer Blum, Peter Baumann, Jacques Dupuis, Josef Neutzner
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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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Publication number: 20110308752Abstract: Process for the production of paper, board and cardboard having high dry strength by addition of a water-soluble cationic polymer and of an anionic polymer to a paper stock, draining of the paper stock and drying of the paper products, wherein an aqueous dispersion of at least one anionic latex and at least one degraded starch is used as the anionic polymer.Type: ApplicationFiled: February 4, 2010Publication date: December 22, 2011Applicant: BASF SEInventors: Anton Esser, Joerg Nieberle
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Publication number: 20110303375Abstract: Dry products, and particularly dry tissue substrates, including a blend of conventional papermaking fibers and microalgae are disclosed herein. Use of a cationic retention aid in the dry tissue substrates helps to provide a tissue sheet retaining the microalgae without being detrimental to tissue properties such as caliper, bulk, air permeability, slough and absorbent capacity. Additionally, use of a flocculating agent may agglomerate the microalgae and make it easier to retain the microalgae within the tissue sheet.Type: ApplicationFiled: December 20, 2010Publication date: December 15, 2011Inventors: Thomas Gerard Shannon, Bo Shi, Ellen Elizabeth Pelky, Jeffrey Robert Besaw, David Wesley Bernd
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Publication number: 20110303376Abstract: Rosin is modified by maleation and then by imidization resulting in attaching a cationic polymer or cationic material upon the rosin. Alternatively, rosin can be fumarated and then cationic material attached by amide links. The products may be used for an efficient paper size and other applications of rosin products.Type: ApplicationFiled: June 15, 2010Publication date: December 15, 2011Applicant: PLASMINE TECHNOLOGY, INC.Inventors: Alan F. Nitzman, Michael T. Huggins, James D. Reeves, A. Timothy Royappa
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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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Publication number: 20110257015Abstract: The present invention relates to a polymeric material comprising units capable of having a cationic charge at a pH of from about 4 to about 12; provided that said polymeric material has an average cationic charge density from about 2.75 or less units per 100 daltons molecular weight at a pH of from about 4 to about 12. The polymeric material is a suds enhancer and a suds volume extender for hand dishwashing compositions and personal care products such as soaps, shaving cream foam, foaming shaving gel, foam dephiliatories and shampoos. The polymers are also effective as a soil release agent in fabric cleaning compositions. The polymers are also useful in agrochemical foam, fire-fighting foam, hard surface cleaner foam, and coagulant for titanium dioxide in paper making.Type: ApplicationFiled: March 24, 2011Publication date: October 20, 2011Applicant: RHODIA INC.Inventors: Vance BERGERON, Dominic Wai-Kwing Yeung, Jean-Francois Bodet, Mark Robert Sivik, Bernard William Kluesener, William Michael Scheper
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Publication number: 20110253333Abstract: A method is described for making paper or paper board by applying a composition containing enzyme and cationic coagulant to papermaking pulp prior to paper forming to preferably improve drainage, retention, or both. Sheets of pulp from which paper or paperboard products are made with the method can exhibit excellent drainage, excellent retention of pulp fines, or both. The method also can be applied to other pulp treatments, such as waste water treatments. A system for making such treatments of paper furnish is also provided.Type: ApplicationFiled: April 14, 2011Publication date: October 20, 2011Applicant: BUCKMAN LABORATORIES INTERNATIONAL, INC.Inventors: Weiping Ban, Gary Headrick, Rosa M. Covarrubias
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Publication number: 20110247774Abstract: The present invention relates to a silica-based sol having a concentration of soluble silica of less than about 1000 mg SiO2/l, conductivity of at least about 2.0 mS/cm and S-value below about 50%. The invention further relates to a method of producing a silica-based sol comprising subjecting an aqueous alkali metal silicate solution to electrodialysis to form an electrodialyzed sol, and acidifying the electrodialyzed sol to form an acidified sol having a pH in the range of from about 5.0 to about 10. The invention further relates to silica-based sol obtainable by the process and to the use of the silica-based sol as a flocculating agent. The invention further relates to a process for producing paper which comprises providing an aqueous suspension comprising cellulosic fibers, adding to the suspension one or more drainage and retention aids comprising a silica-based sol according to the invention, and dewatering the obtained suspension to provide a sheet or web of paper.Type: ApplicationFiled: July 10, 2009Publication date: October 13, 2011Applicant: AKZO NOBEL N.V.Inventors: Marek Tokarz, Hans-Ake Baltsen
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Stable and Aqueous Compositions of Polyvinylamines with Cationic Starch, and Utility for Papermaking
Publication number: 20110247775Abstract: A stable aqueous composition comprising polyvinylamine and liquid cationic starch in a ratio of from 90 to 55 parts of polyvinylamine 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.Type: ApplicationFiled: April 7, 2011Publication date: October 13, 2011Inventors: Frank J. Sutman, Christopher P. Dilkus, Qu-Ming Gu -
Publication number: 20110247773Abstract: The present invention relates to a process for producing paper which comprises: (i) providing an aqueous suspension comprising cellulosic fibres, (ii) 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 (iii) dewatering the obtained suspension to form paper.Type: ApplicationFiled: May 3, 2011Publication date: October 13, 2011Applicant: AKZO NOBEL N.V.Inventors: Fredrik Solhage, Joakim Carlén, Birgitta Johansson
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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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Patent number: 8025767Abstract: They are mixtures of (a) from 1 to 99.9% by weight of a water-soluble epihalohydrin-crosslinked polyamidoamine and (b) from 0.1 to 20% by weight of at least one other cationic polymer.Type: GrantFiled: July 7, 2008Date of Patent: September 27, 2011Assignee: BASF AktiengesellschaftInventors: Ellen Krueger, Martin Wendker, Stefan Frenzel, Claus Boettcher
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Publication number: 20110226433Abstract: 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 by preflocculating the filler particles. 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 paper fibers together tightly and is not wasted on the filler particles.Type: ApplicationFiled: March 19, 2010Publication date: September 22, 2011Inventors: Weiguo Cheng, Ross T. Gray
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Patent number: 8021516Abstract: A water-soluble interjacent complex that includes a first water-soluble polymer and one or more water-soluble monomers polymerized to form a second water-soluble polymer in the presence of the first water-soluble polymer. The water-soluble interjacent complex forms a solution in water that is free of insoluble polymer particles. The interjacent complexes may be used to treat a waste sludge by adding an effective amount thereof to the waste sludge. The interjacent complexes may also be used in making paper by adding an effective amount thereof to a pulp or a forming sheet at a suitable location on a paper making machine. The interjacent complexes may further be used as a rheology modifier in aqueous systems by adding an effective amount thereof to an aqueous medium to effect a desired viscosity, rheology, or flow curve property.Type: GrantFiled: April 6, 2009Date of Patent: September 20, 2011Assignee: WSP Chemicals & Technology, LLCInventors: Shih-Ruey T Chen, Valentino L. DeVito, Kevin W. Frederick
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Publication number: 20110203756Abstract: The invention relates to thermally expandable thermoplastic microspheres comprising a polymer shell made from ethylenically unsaturated monomers encapsulating a propellant, said ethylenically unsaturated monomers comprising from 40 to 70 wt % of acrylonitrile, from 5 to 40 wt % of methacrylonitrile, from 10 to 50 wt % of monomers selected from the group consisting of esters of acrylic acid, esters of methacrylic acid and mixtures thereof, and said propellant comprising at least one of methane, ethane, propane, isobutane, n-butane and neo-pentane. The invention further relates to the production and use of the microspheres.Type: ApplicationFiled: May 3, 2011Publication date: August 25, 2011Applicant: AKZO NOBEL N.V.Inventors: Ove Nordin, Heléne Ström, Christina Nyholm, Claes Hammer
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Patent number: 8002949Abstract: A composition for cellulostic fibers containing amino silicone to impart improved hand feel. The composition may be included in a lotion applied to tissue paper and may include a hydrophilic softener. A carrier for trace substances, fragrances, vitamin E, aloes and colouring agents may also be used. Such carrier may comprise microcapsules.Type: GrantFiled: October 6, 2009Date of Patent: August 23, 2011Assignee: Kruger Products L.P.Inventors: Philip Buder, Vincent Denis Landry, Charles William Alexander Stewart, Jose Enrique Castell Perez, Richard Hector Gendron, Marc Joseph Gilles Desaulniers
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Patent number: 7998311Abstract: 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 pH 6. 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).Type: GrantFiled: July 24, 2008Date of Patent: August 16, 2011Assignee: Hercules IncorporatedInventor: Daniel F. Varnell
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Publication number: 20110174453Abstract: The invention relates to an aqueous polymer dispersion comprising an anionic water-soluble dispersion polymer comprising in polymerized form a monomer mixture comprising (i) one or more anionic monomers, (ii) a first non-ionic vinyl monomer which is acrylamide, and (iii) at least one second non-ionic vinyl monomer; a water-soluble salt and a stabilizer, wherein the water soluble salt is present in an amount of at least 2.0% by weight, based on the total weight of the dispersion. The invention further relates to a process for producing the aqueous polymer dispersion, use of the aqueous polymer dispersion as a flocculating agent in papermaking or for water purification, and a process for producing paper which comprises adding one or more drainage and retention aids comprising the aqueous polymer dispersion to an aqueous suspension containing cellulosic fibres and then dewatering the obtained suspension.Type: ApplicationFiled: August 19, 2009Publication date: July 21, 2011Applicants: AKZO NOBEL B.V., Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V.Inventors: Christian Przybyla, Oliver Struck, André Laschewsky, Bernd-Reiner Paulke
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Publication number: 20110168344Abstract: A process for the production of paper, board and cardboard by draining a paper stock on a wire in the presence of at least one cationic polymeric retention aid and/or retention aid system with sheet formation and drying of the sheets, wherein an endo-?-1,4-glucanase is metered in an amount of from 0.00001 to 0.01% by weight, based on the dry paper stock, into the paper stock before the addition of the at least one cationic polymeric retention aid and/or retention aid system.Type: ApplicationFiled: August 28, 2009Publication date: July 14, 2011Applicant: BASF SEInventors: Torsten Klein, Christina Jehn-Rendu, Hans-Georg Lemaire, Oliver Koch
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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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Publication number: 20110155339Abstract: 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 daltons 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.Type: ApplicationFiled: December 22, 2010Publication date: June 30, 2011Inventors: Clement L. Brungardt, Jonathan M. McKay, Richard J. Riehle
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Publication number: 20110146926Abstract: 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.Type: ApplicationFiled: December 17, 2010Publication date: June 23, 2011Inventors: Susan M. Ehrhardt, Kyle J. Bottorff
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Publication number: 20110139388Abstract: A cationic starch graft copolymer is prepared by polymerization of monomers a) to d) a) 20-80% by weight of acrylamide, methacrylamide or mixtures thereof, b) 3-20% by weight of at least one basic or cationic vinyl monomer; c) 0.005-1.5% by weight of at least one bifunctional or higher-functional crosslinking agent, d) 0-10% by weight of at least one nonionic or anionic vinyl monomer which differs from the monomers mentioned under a) to c) in the presence of a grafting base e) e) 15-70% by weight of at least one starch or one starch derivative, the sum of a) to e) being 100% by weight.Type: ApplicationFiled: February 18, 2011Publication date: June 16, 2011Applicant: KEMIRA OYJInventors: Bernd Hauschel, Bernd Thiele, Thomas Hübbe, Bernhard Jansen
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Patent number: 7959761Abstract: The present invention relates to the use of a quaternary ammonium complex comprising at least one non-cyclic amide as a modifier for a creping adhesive used on a creping cylinder, e.g., a Yankee dryer.Type: GrantFiled: April 9, 2003Date of Patent: June 14, 2011Assignee: Georgia-Pacific Consumer Products LPInventors: Jeffery J. Boettcher, Nancy S. Clungeon, Bruce J. Kokko, Elroy W. Post, Phuong V. Luu, Gary L. Worry, Greg A. Wendt
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Publication number: 20110132559Abstract: Process for the production of paper, board and cardboard having high dry strength by addition of at least one water-soluble (a) polymer comprising vinylamine units and at least one (b) polymer comprising ethylenimine units and at least one water-soluble polymeric anionic compound to a paper stock, draining of the paper stock with sheet formation and drying of the paper products, the water-soluble cationic polymers (a) and (b) being metered in any sequence or as a mixture into a paper stock, and papers which are obtainable by this process.Type: ApplicationFiled: August 10, 2009Publication date: June 9, 2011Applicant: BASF SEInventors: Hans-Joachim Haehnle, Christian Jehn-Rendu, Rainer Blum, Ellen Krueger, Norbert Schall, Martin Ruebenacker
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Patent number: 7951265Abstract: Aqueous slurries of finely divided fillers which are at least partly coated with polymers and which are obtainable by treating aqueous slurries of finely divided fillers with at least one water-soluble amphoteric copolymer whose structures are identified in the specification are used as an additive to the paper stock in the production of filler-containing paper, filler-containing cardboard or filler-containing board by draining of the paper stock.Type: GrantFiled: March 18, 2005Date of Patent: May 31, 2011Assignee: BASF AktiengesellschaftInventors: Anton Esser, Volker Braig, Martin Wendker, Rainer Blum, Peter Baumann, Josef Neutzner, Jacques Dupuis, Hans-Joachim Haehnle
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Publication number: 20110108226Abstract: Aqueous slurries of finely divided fillers which are at least partly covered by anionic latices, the slurries being obtainable by treating aqueous slurries of finely divided fillers with at least one anionic latex with a glass transition temperature of ?5 to ?50° C., preparation of the aqueous slurries and their use as an additive to the paper stock in the production of filler-containing paper, filler-containing cardboard or filler-containing board by draining the paper stock.Type: ApplicationFiled: June 30, 2009Publication date: May 12, 2011Applicant: BASF SEInventors: Juergen Schmidt-Thuemmes, Anton Esser, Joerg Nieberle
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Publication number: 20110111241Abstract: The invention relates to a hybrid resin, which is suitable in particular for impregnating paper webs. The hybrid resin according to the invention can be advantageously used for improving the mechanical properties of counteracting layers in multilayer boards.Type: ApplicationFiled: July 1, 2009Publication date: May 12, 2011Applicant: KAINDL DECOR GMBHInventor: Paul Leitner
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Publication number: 20110108225Abstract: This invention relates to paper products and/or substrates suitable for being made and/or converted into wallboard tape; which also may be known as joint tape and/or drywall tape, having a pH of at least 7.0 and containing a plurality of cellulose fibers, a wet strength additive, an alkaline sizing agent, and an anionic promoter, as well as methods of making and using the same.Type: ApplicationFiled: August 19, 2010Publication date: May 12, 2011Applicant: INTERNATIONAL PAPER COMPANYInventors: STEPHEN A. BUZZA, DENNIS W. ANDERSON, YUFENG XU, BRUCE RICHARD MCGAFFIN, CHRISTOPHER MICHAEL WILSON
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Patent number: 7938934Abstract: The invention provides a method and apparatus for optimally feeding an ASA emulsion into a papermaking process. An intense transmission of ultrasonic energy rapidly and efficiently forms an ASA emulsion. Nearly simultaneous to forming the emulsion, the emulsion is fed into a high-speed dual conduit feeding apparatus, which quickly mixes the ASA emulsion with other chemicals and feeds the mixture directly into a papermaking process. The invention operates so fast that virtually no hydrolysis of the ASA occurs. This both prevents damage to the papermaking machinery and improves the quality of the produced paper. The invention operates 10-20 times faster than mechanical based emulsion methods and requires 1/7 as much energy to operate. The invention also self-monitors the process and can automatically correct any detected problems with the fed ASA emulsion.Type: GrantFiled: February 9, 2009Date of Patent: May 10, 2011Assignee: Nalco CompanyInventors: Aleksandar Todorovic, Tommy Jacobson