Acrylamide Containing Patents (Class 162/168.3)
-
Patent number: 12203220Abstract: Paper treating compositions and methods of using the same are disclosed herein. The paper treating compositions of the present disclosure may include a strength agent and a surfactant or a sizing agent and a surfactant. The compositions and methods can be used to improve sizing and paper strength, especially, for example in spray size press applications.Type: GrantFiled: March 31, 2020Date of Patent: January 21, 2025Assignee: Ecolab USA Inc.Inventors: David J. Castro, Victor Fuk-Pong Man, Stephen Raye Marrou, Gang Pu
-
Patent number: 12077654Abstract: In some variations, the present invention provides an oil-resistant paperboard material coated with hydrophobic nanocellulose. The paperboard material is free of a fluorocarbon coating. In other variations, an oil-resistant paper is coated with hydrophobic nanocellulose and is free of a fluorocarbon coating. The hydrophobic nanocellulose may include lignin-coated cellulose nanofibrils, lignin-coated cellulose nanocrystals, or a combination thereof.Type: GrantFiled: September 10, 2019Date of Patent: September 3, 2024Assignee: GranBio Intellectual Property Holdings, LLCInventors: Kimberly Nelson, Theodora Retsina
-
Patent number: 11999809Abstract: Disclosed herein are new graft copolymers of dextran and polyacrylamide. The graft copolymers can include dextran, where the dextran is a backbone polymer including about 15 wt % to about 50 wt % of the graft copolymer; and polyacrylamide, where the polyacrylamide is a side chain polymer including about 50 wt % to about 85 wt % of the graft copolymer, based on the total weight of the graft copolymer, where the graft copolymer has a weight-average molecular weight from about 1,000,000 g/mol to about 1,500,000 g/mol. The graft copolymers of dextran and polyacrylamide can be used as friction reducers for well treatment fluids.Type: GrantFiled: June 10, 2022Date of Patent: June 4, 2024Assignee: FERMWORX, LLCInventors: D. V. Satyanarayana Gupta, Michael Joseph Rubal, Derek Christopher Mouton
-
Patent number: 11926968Abstract: Provided is a method for producing paper that enables to fix an increased amount of starch components contained in papermaking process water to a papermaking raw material (suspended solid: SS) contained in the papermaking process water, and enables (1) enhancement of the strength of paper, (2) reduction in the contamination of the papermaking process water by microorganisms, etc., (3) suppression of the foaming of the papermaking process water, (4) decrease in the load of the waste water treatment, etc. The method comprises a step of adding a polymer having a polyalkylene oxide moiety to papermaking process water containing SS containing a papermaking raw material and unfixed starch. At this time, the concentration of SS contained in the papermaking process water is 100 mg/L or more, the concentration of the unfixed starch is 10 mg/L or more, and the salt viscosity of the polymer is 3 mPa·s or more.Type: GrantFiled: April 11, 2019Date of Patent: March 12, 2024Assignee: KURITA WATER INDUSTRIES LTD.Inventor: Takashi Saigusa
-
Patent number: 11926966Abstract: A method of increasing chemical efficiency of chemical additives in a papermaking system includes the steps of providing thick stock pulp comprising soluble lignin, process water, and at least about 2% by weight of cellulosic fiber based on total weight of thick stock pulp, and adding at least one organic polymer to the thick stock pulp to reduce the amount of soluble lignin therein. The organic polymer is chosen from cationic polymers, non-ionic polymers and combinations thereof.Type: GrantFiled: October 30, 2020Date of Patent: March 12, 2024Assignee: SOLENIS TECHNOLOGIES, L.P.Inventors: Davit Edward Sharoyan, John Charles Harrington, IV, Valmir Frauches de Freitas, Flávio Henrique Gazzotti Bueno de Oliveira
-
Patent number: 11802376Abstract: The present invention relates to a polymer composition comprising an anionic polymer composite having a synthesized polymer portion and a polysaccharide portion, obtainable by polymerizing vinyl monomers in the presence of the polysaccharide. The present invention further relates to a strength system and methods of production and use in providing a paper product.Type: GrantFiled: May 14, 2018Date of Patent: October 31, 2023Assignee: KEMIRA OYJInventors: Chen Lu, Jenna Rabideau
-
Patent number: 11795620Abstract: A method for manufacturing a powdery paper-strengthening agent including a branched (meth)acrylamide-based polymer (A) which includes a step of obtaining (A) component by polymerizing (meth)acrylamide (a1), anionic vinyl monomer (a2), cationic vinyl monomer (a3) and crosslinkable vinyl monomer (a4) in a solvent in a presence of a polymerization initiator, a step of dropping or putting the above (A) component into an organic solvent to form a precipitate, and a step of drying and pulverizing (A) component obtained as the precipitate.Type: GrantFiled: October 28, 2022Date of Patent: October 24, 2023Assignee: ARAKAWA CHEMICAL INDUSTRIES, LTD.Inventors: Ryusuke Kambara, Daisuke Fujioka, Shogo Nishiura
-
Patent number: 11535985Abstract: A method for manufacture of paper or board, in which method an inverted solution of cationic polymer is added to the fiber suspension for providing retention enhancement without over-flocculating fiber stock and destruction sheet formation and/or improving drainage and enhancing or at least maintaining strength of paper or board, An inverted solution has a bulk viscosity of 50-150 mPas at 0.2 weight-% cationic polymer concentration and inverted solution comprises cationic polymer obtained by reverse phase emulsion polymerization of a monomer blend comprising non-ionic monomers, 15-50 mol-% cationic monomers, an optionally at most 50 ppm of a crosslinking agent, and a chain transfer agent, and the obtained reverse phase emulsion of cationic polymer is inverted into an aqueous solution.Type: GrantFiled: June 30, 2020Date of Patent: December 27, 2022Assignee: Kemira OyjInventors: Yuping Luo, Jennifer Riser, Zheng Dang, Junhua Chen, Ronald Robinson, Andrew Pencek, Barbara Lukasik
-
Patent number: 11518695Abstract: A method for producing an aqueous copolymer solution, which comprises dissolving a copolymer of (meth)acrylamide and at least 1 mol-% cationic monomers, calculated from total amount of monomers in the dissolving water having calcium hardness of at least mg/l, expressed as Ca2+, and adding acid comprising monoprotic organic acid and/or mineral acid to the dissolving water and/or the aqueous solution of the copolymer in an amount sufficient to provide the aqueous solution of the copolymer with a pH of equal to or less than 4.5. The invention also relates to uses of the obtained polymer solutions in manufacturing of paper, board or the like or in treatment of sludge or water.Type: GrantFiled: May 15, 2018Date of Patent: December 6, 2022Assignee: Kemira OyjInventors: Asko Karppi, Matti Hietaniemi
-
Patent number: 11517453Abstract: A bio-printing process comprises a step of preparing a target digital model representative of the three-dimensional organization of the tissue to be produced, a step of controlling a bio-printing instrument for the deposition of a plurality of layers of living cells and of biomaterials, a step of calculation of a digital printing model as a function of the digital model of the product to be produced, and of a model predicting change, and also characteristics of the constituents to be printed. The step of controlling the bio-printing instrument is carried out according to the digital printing model calculated in this way. A system is also described for implementing this process.Type: GrantFiled: March 8, 2018Date of Patent: December 6, 2022Assignee: PoietisInventors: Fabien Guillemot, Bertrand Viellerobe, Guillaume Simon, Guillaume Vandeneeckhoutte
-
Patent number: 11242653Abstract: A strength additive system for manufacturing paper, board, tissue or the like includes preferably as separate components, a cationic strength agent, such as a cationic polymer with aldehyde functional groups, and an anionic copolymer obtained by polymerization of a reaction mixture including (meth)acrylamide and anionic monomers, the standard viscosity of the obtained copolymer being in a range of 1.5-5.0 mPas. A method for manufacturing of a paper, board, tissue or the like is further disclosed.Type: GrantFiled: June 15, 2018Date of Patent: February 8, 2022Assignee: Kemira OyjInventors: Logan Jackson, Chen Lu, Jenna Rabideau
-
Patent number: 11214926Abstract: A method of incorporating a low molecular weight polymer (e.g., polymer strength aid) into an industrial process (e.g., papermaking process) is provided. The method comprises treating an industrial process (e.g., paper sheet precursor) with a powder or wetted powder, wherein the powder comprises a polymer dry polymer (e.g., polymer strength aid), wherein the polymer dry polymer (e.g., polymer strength aid) has a weight average molecular weight of from about 10 kDa to about 2,000 kDa.Type: GrantFiled: July 31, 2018Date of Patent: January 4, 2022Assignee: ECOLAB USA INC.Inventors: Robert M. Lowe, Weiguo Cheng, David Jordan, Heqing Huang
-
Patent number: 11208766Abstract: A surface treatment composition is disclosed including anionic polyacrylamide, which has a weight average molecular weight, MW, in the range of 100 000-2 000 000 g/mol, and free glyoxal. Further disclosed is a use of the surface treatment composition, a method for producing paper, board or the like and a paper product.Type: GrantFiled: September 26, 2018Date of Patent: December 28, 2021Assignee: Kemira OyjInventors: Yuping Luo, Junhua Chen, Zheng Dang, Jennifer Riser
-
Patent number: 10988899Abstract: Methods and compositions useful for improving drainage in a fluff pulp drying process are provided. The methods and compositions comprise alkyl ether sulfate and ethylene oxide/propylene oxide copolymer. In particular, the methods and compositions can improve drainage of fluff pulp in fluff pulp drying processes.Type: GrantFiled: March 8, 2018Date of Patent: April 27, 2021Assignee: ECOLAB USA INC.Inventors: Luiz Wanderley Bratfisch Pace, Gary Samuel Furman, Jr., André Messias Krell Pedro, Kraig R. Kent
-
Patent number: 10954633Abstract: An improved process for making paper or paper board is provided. The process comprises providing a cellulosic fibre suspension comprising recycled fibre material, and having a conductivity of at least 1.5 mS/cm; and adding a glyoxalated copolymer of acrylamide and cationic monomers and inorganic siliceous microparticles to the fibre suspension, sequentially or simultaneously. Advantages comprise improved productivity of the process, and paper strength.Type: GrantFiled: September 30, 2016Date of Patent: March 23, 2021Assignee: Kemira OyjInventors: Christopher Michael Lewis, William James Garrisi
-
Patent number: 10519602Abstract: An acrylamide-based polymer which contains one or more multiquaternized (“multiquat”) monomer unit(s) is provided. The acrylamide-based polymer can be used in a papermaking process to reduce pitch and stickies deposition, improve retention and drainage, and enhance dry strength properties of paper. Also included is a method of controlling pitch and stickies deposition in papermaking comprising treating pulp slurry with an acrylamide-based polymer which contains one or more multiquaternized (“multiquat”) monomer unit(s).Type: GrantFiled: June 14, 2018Date of Patent: December 31, 2019Assignee: Ecolab USA Inc.Inventors: Xiaojin Harry Li, Sergey M. Shevchenko, Ross Gray, Robert M. Lowe, David Jordan, Zhengang Zong
-
Patent number: 10407831Abstract: The invention relates to a composition for sizing of a surface of paper, board or the like and its use for increasing strength properties of paper, board or the like. The composition has a solids content of 3-30%, and it comprises degraded non-ionic starch, and at least 0.5 weight-% of anionic polyacrylamide, which has a molecular weight, MW, >500 000 g/mol and <2 500 000 g/mol and an anionicity in the range of 4-35 mol-%. The invention further relates also to a method for producing paper, board or the like, which comprises addition of a first strength composition, which comprises a cationic agent, to a fiber stock, formation of a fibrous web from the fiber stock, drying of the fibrous web to dryness of at least 60%, and application of a second strength composition, which comprises an anionic hydrophilic polymer and a starch component, on the surface of the fibrous web.Type: GrantFiled: September 4, 2015Date of Patent: September 10, 2019Assignee: Kemira OyjInventors: Matti Hietaniemi, Jan-Luiken Hemmes, Vladimir Grigoriev, Asko Karppi
-
Patent number: 10316469Abstract: An on-line control and reaction process for pH adjustment and a control device for automatically adjusting pH value are provided. The process includes mixing a first enhancer and a second enhancer, optionally after diluting the first enhancer and/or the second enhancer with water, to form a mixture, setting a base pH value (?1) and a target pH value (?2), and adding pH adjuster into the mixture via a pH control unit and mixing to obtain a product with the target pH value. The pH control unit adjusts the adding of the pH adjuster by measuring or inputting certain parameters.Type: GrantFiled: December 9, 2015Date of Patent: June 11, 2019Assignee: Ecolab USA Inc.Inventors: Meng Zhang, Na Xu, Jun Li, Yulin Zhao
-
Patent number: 10144818Abstract: Resins compositions and methods for making and using same. The resin composition can include a glyoxalated polyacrylamide resin and a polyamide-epihalohydrin resin. The polyamide-epihalohydrin resin can include a polyamine partially crosslinked with a bridging moiety and having azetidinium ions. The bridging moiety can be derived from a functionally symmetric crosslinker. A fiber product can include a plurality of fibers and the resin composition, where the resin composition can be at least partially cured.Type: GrantFiled: October 15, 2015Date of Patent: December 4, 2018Assignee: ECOLAB USA INC.Inventors: Clay E. Ringold, David F. Townsend, Cornel Hagiopol, James W. Johnston
-
Patent number: 10132039Abstract: Process for manufacturing a sheet of paper and/or of paperboard and the like, according to which, the cellulosic material is brought into contact with at least one dry strength aid, characterized in that said dry strength aid is a cationic or amphoteric (co)polymer derived from the reaction between at least one aldehyde and at least one base (co)polymer comprising at least one nonionic monomer, said base copolymer being modified with at least one polyfunctional compound comprising at least three heteroatoms chosen from N, S, O and P, in which at least three of these heteroatoms each have at least one mobile hydrogen.Type: GrantFiled: October 18, 2016Date of Patent: November 20, 2018Assignee: S.P.C.M SAInventors: René Hund, Cyril Barriere
-
Patent number: 9995001Abstract: The acrylamide-based polymer is produced by polymerizing a polymer component including (meth)acrylamide, a quaternary ammonium-based monomer, and (meth)allylsulfonic acid salt, but not including either a crosslinkable monomer containing nitrogen or a tertiary amino-based monomer.Type: GrantFiled: October 28, 2015Date of Patent: June 12, 2018Assignee: HARIMA CHEMICALS, INCORPORATEDInventors: Hirotaka Sato, Tadaaki Horii, Takanori Kurihara, Takahiro Fujiwara, Kazushige Inaoka
-
Patent number: 9873983Abstract: The invention provides a process for paper-making comprising adding to pulp slurry at least a first aqueous liquid and a second aqueous liquid so as to obtain a paper stock; forming the paper stock so as to obtain a wet paper web; pressing and draining the wet paper web so as to obtain a wet paper sheet; and drying the wet paper sheet so as to obtain a paper sheet. Correspondingly, the invention provides an aid composition for paper-making.Type: GrantFiled: September 12, 2014Date of Patent: January 23, 2018Assignee: Ecolab USA Inc.Inventors: Bo Zhu, Meng Zhang, Jun Li, Na Xu, Yulin Zhao
-
Patent number: 9561974Abstract: A system and method for treating water or sewage is provided. The system can include a screening tank, a septic tank, a flocculant and mixing reactor, a primary clarifier, a secondary clarifier, a sludge dewatering tank, a surge tank, one or more filter tanks and a disinfection tank. The method can include the steps of receiving water or sewage to be treated and passing it through a screening tank and septic tank, a flocculant reactor, a primary clarifier, a secondary clarifier, a sludge dewatering tank, a surge tank, one or more filter tanks and a disinfection tank.Type: GrantFiled: January 17, 2012Date of Patent: February 7, 2017Assignee: Clearflow Group Inc.Inventors: Gerald Hanna, Alberto Valdes
-
Patent number: 9506195Abstract: One or more embodiments include paper, methods of making paper, compositions, and the like, are provided. In various exemplary embodiments described herein, a paper material may be formed by treating a cellulosic fiber or an aqueous pulp slurry with a treatment composition comprising an anionic polyacrylamide resin and an aldehyde-functionalized polymer resin.Type: GrantFiled: February 18, 2016Date of Patent: November 29, 2016Assignee: KEMIRA OYJInventors: Junhua Chen, Chen Lu, Scott Rosencrance, Frank Zimmermann
-
Patent number: 9328462Abstract: One or more embodiments include paper, methods of making paper, compositions, and the like, are provided. In various exemplary embodiments described herein, a paper material may be formed by treating a cellulosic fiber or an aqueous pulp slurry with a treatment composition comprising an anionic polyacrylamide resin and an aldehyde-functionalized polymer resin.Type: GrantFiled: June 17, 2013Date of Patent: May 3, 2016Assignee: KEMIRA, OYJInventors: Junhua Chen, Chen Lu, Scott Rosencrance, Frank Zimmermann
-
Patent number: 9017520Abstract: Paper coating or binding formulations are provided that comprise aqueous copolymer emulsions including copolymers derived from one or more copolymerizable surfactants of formula I and one or more monomers. The paper coating or binding formulations can include one or more mineral fillers, coating pigments, or mixtures thereof, wherein the total weight concentration of the one or more mineral fillers, coating pigments, or mixtures thereof is 65% or higher, based on the total weight of the composition. Paper products coated with the paper coating or binding formulations, methods of making the paper coating or binding formulations, and methods of making the coated paper products are also disclosed.Type: GrantFiled: March 21, 2011Date of Patent: April 28, 2015Assignee: BASF SEInventor: Peter C. Hayes
-
Publication number: 20150096698Abstract: The present invention concerns a process for preparing self-binding pigment particles from an aqueous suspension of calcium carbonate containing material, wherein an anionic binder and at least one cationic polymer are mixed with the suspension.Type: ApplicationFiled: May 2, 2013Publication date: April 9, 2015Inventors: Daniel Gantenbein, Joachim Schoelkopf, Patrick A.C. Gane
-
Patent number: 8999112Abstract: A method for manufacturing a sheet of paper and/or board having improved retention and drainage properties is provided, according to which, before the formation of the sheet and/or board, at least two retention aids are added to the fibrous suspension. These two retention aids are a main retention aid corresponding to a (co)polymer having a cationic charge density above 2 meq/g, obtained by the Hofmann degradation reaction, and a secondary retention aid corresponding to a water-soluble or water-swellable polymer having an anionic charge density above 0.1 meq/g. The main retention aid is introduced into the fibrous suspension in a proportion of 100 to 800 g/t of dry pulp, and the secondary retention aid is introduced into the fibrous suspension in a proportion of 50 to 800 g/t of dry pulp and has an intrinsic viscosity IV above 3 dl/g.Type: GrantFiled: January 30, 2013Date of Patent: April 7, 2015Assignee: S.P.C.M. SAInventors: Gatien Faucher, Rene Hund
-
Patent number: 8999111Abstract: The invention provides methods and compositions for increasing the strengthening effect of a starch coating on paper. The method involves contacting the starch with a synthetic polymer before the starch is cooked. This changes how the starch gelatinizes and how the polymer gets distributed on the paper resulting in greater paper surface strength.Type: GrantFiled: December 28, 2012Date of Patent: April 7, 2015Assignee: Ecolab USA Inc.Inventors: David J Castro, Mei Liu, Gary S Furman, Dorota Smoron, Shawnee M Wilson, Zhiyi Zhang
-
Patent number: 8980058Abstract: A modified filler composition used in papermaking is provided. The modified filler composition contains microfibrillated cellulose, and filler having negative charge, and a cationic polymer.Type: GrantFiled: January 21, 2014Date of Patent: March 17, 2015Assignee: Goldeast Paper (Jiangsu) Co., LtdInventors: Yan Feng, Dequanjiang
-
Patent number: 8980056Abstract: 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: GrantFiled: November 15, 2010Date of Patent: March 17, 2015Assignee: Kemira OyjInventors: Chen Lu, Vladimir Grigoriev, Scott Rosencrance
-
Publication number: 20150065672Abstract: Amphiphilic macromolecules having repeating structural units: structural units to adjust molecular weight and molecular weight distribution and charging property effects, high stereo-hindrance structural units, and amphiphilic structural units, and are suitable for fields such as oil field well drilling, well cementation, fracturing, oil gathering and transfer, sewage treatment, sludge treatment and papermaking, etc., and can be used as an oil-displacing agent for enhanced oil production, a heavy oil viscosity reducer, a fracturing fluid, a clay stabilizing agent, a sewage treatment agent, a papermaking retention and drainage aid or a reinforcing agent, etc.Type: ApplicationFiled: September 16, 2011Publication date: March 5, 2015Applicant: BEIJING JUNLUN RUNZHONG SCIENCE & TECHNOLOGY CO., LIMITEDInventors: Jinben Wang, Xuefeng Shi, Xiaohui Xu, Hui Yang, Yilin Wang, Haike Yan
-
Publication number: 20150053361Abstract: Polymer complex obtained by polymerization of water-soluble monomers: in the presence of a host polymer comprising vinylamine functions and of a non-polymeric transfer agent, and in the absence of branching or crosslinking agent of ethylenic polyfunctional type.Type: ApplicationFiled: July 24, 2014Publication date: February 26, 2015Applicant: S.P.C.M. SAInventors: René HUND, Gatien FAUCHER, Damien FOUGEROUSSE
-
Publication number: 20150041090Abstract: A method of treating a cellulosic slurry to improve drainage is disclosed the method comprises adding a PEO to a cellulosic furnish in an amount of from 0.1 to 10 lbs per ton and adding a synthetic polymer to the furnish in an amount of from 0.1 to 10 lbs per ton, allowing the furnish to drain and forming a paper product.Type: ApplicationFiled: August 7, 2014Publication date: February 12, 2015Inventors: John C. Harrington, Lance P. Perticone, Kane D. Sheldon, Bryan K. Spraul, Richard M. Verbrugge
-
Publication number: 20150041092Abstract: The invention relates to a method for making of paper, tissue, board or the like by using recycled fibre material as a raw material. The method comprises following steps: pulping recycled paper, board or the like in a pulper and obtaining a pulp flow comprising (i) an aqueous phase and (ii) at least recycled fibres and starch having low molecular weight, which are dispersed in the aqueous phase; adding a coagulant agent to the pulp flow or to an aqueous process flow comprising starch having low molecular weight; allowing the coagulant agent to interact with the starch having low molecular weight and optionally forming aggregates; and adding at least one flocculating agent, after the addition of the coagulant agent, to any flow, which comprises interacted coagulant agent, and forming a treated flow with starch comprising agglomerate(s); retaining at least part of the said aggregates and/or the said agglomerates to the fibres or to a web, which is formed.Type: ApplicationFiled: February 22, 2013Publication date: February 12, 2015Inventors: Matti Hietaniemi, Kimmo Strengell, Asko Karppi, Marko Kolari, Jaakko Ekman
-
Publication number: 20150041091Abstract: The invention provides methods and compositions for improving the characteristics of paper substrates. The method involves adding to a paper substrate an NCC-polymer. NCC-polymers have unique chemical properties which result in improvements in wet strength, dry strength and drainage retention properties of the paper substrates.Type: ApplicationFiled: October 1, 2013Publication date: February 12, 2015Applicant: Ecolab USA Inc.Inventors: David J. Castro, Rangarani Karnati, Shawnee M. Wilson, Weiguo Cheng, Mei Liu, Zhiyi Zhang
-
Publication number: 20150027651Abstract: A pulp making process in which fibrous cellulosic material is pulped to form an aqueous suspension of cellulosic material, the suspension is drained through a screen to form a pulp sheet and that the pulp sheet is dried to form a dry market pulp, in which a water soluble cationic polymer is added to the suspension as the sole drainage aid wherein the water-soluble cationic polymer is either, i) a copolymer comprising (a) between 1 and 70 mole % (meth) acrylamide and (b) between 30 and 99 mole % (meth) acryloyloxyethyltrimethyl ammonium chloride with an intrinsic viscosity between 5 and 9 dl/g; or ii) a hydrolysed homopolymer of vinylformamide comprising between 1 and 100 mole % vinyl amine units and having a K value of between 45 and 240. The process of the invention provides improved drainage time and solids content of the dewatered pulp.Type: ApplicationFiled: August 6, 2014Publication date: January 29, 2015Applicant: BASF SEInventors: Christian JEHN-RENDU, Joachim Hege, Detlef Kannengiesser
-
Patent number: 8926797Abstract: 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: GrantFiled: June 7, 2010Date of Patent: January 6, 2015Assignee: BASF SEInventors: Christian Jehn-Rendu, Ellen Krueger, Hans-Joachim Haehnle, Martin Ruebenacker, Norbert Schall, Thomas Muehlenbernd
-
Publication number: 20150000852Abstract: The disclosure provides a dispersion for making décor paper having improved optical performance without negatively impacting mechanical strength comprising a TiO2 particle slurry comprising a treated TiO2 particle having a surface area of at least about 30 m2/g, and a cationic polymer; wherein the treatment comprises an oxide of silicon, aluminum, phosphorus or mixtures thereof; and the treatment is present in the amount of at least 15% based on the total weight of the treated titanium dioxide particle; paper pulp; and a cationic polymer; wherein the cationic 1.5 polymer in the slurry and the cationic polymer in the dispersion are compatible; wherein for equal optical performance, the amount of treated TiO2 particle in the dispersion is reduced by about 10% when compared to a dispersion not comprising the treated TiO2 particle of (a). These dispersions are useful in making décor paper that may be used in paper laminates.Type: ApplicationFiled: January 9, 2013Publication date: January 1, 2015Inventors: Mitchell Scott Chinn, Franck Andre Vanhecke
-
Patent number: 8920606Abstract: The present disclosure is directed to a continuous process for preparing cellulose reactive adducts of polyvinylamide.Type: GrantFiled: December 6, 2012Date of Patent: December 30, 2014Assignee: BASF SEInventor: Matthew D. Wright
-
Patent number: 8916024Abstract: Methods and systems are provided for producing market pulp which include treatment of pulp with diverse ionic compounds before pulp drying. Cationically and anionically charged compounds can be used to treat pulp before pulp drying to improve pulp dewatering performance and efficiency in the production of market pulp. Market pulp products containing the treatment compounds are also described.Type: GrantFiled: November 26, 2012Date of Patent: December 23, 2014Assignee: Buckman Laboratories International, Inc.Inventors: Weiping Ban, Philip M. Hoekstra, Michael R. Elsey
-
Patent number: 8916026Abstract: A pulp making process in which fibrous cellulosic material is pulped to form an aqueous suspension of cellulosic material, the suspension is drained through a screen to form a pulp sheet and that the pulp sheet is dried to form a dry market pulp, in which a water soluble cationic polymer is added to the suspension as the sole drainage aid wherein the water-soluble cationic polymer is either, i) a copolymer comprising (a) between 1 and 70 mole % (meth)acrylamide and (b) between 30 and 99 mole % (meth)acryloyloxyethyl-trimethyl ammonium chloride with an intrinsic viscosity between 5 and 9 dl/g; or ii) a hydrolysed homopolymer of vinylformamide comprising between 1 and 100 mole % vinyl amine units and having a K value of between 45 and 240. The process of the invention provides improved drainage time and solids content of the dewatered pulp.Type: GrantFiled: November 14, 2011Date of Patent: December 23, 2014Assignee: BASF SEInventors: Christian Jehn-Rendu, Joachim Hege, Detlef Kannengieβer
-
Publication number: 20140371172Abstract: The present invention relates to a process for the production of suspensions of nano-fibrillar cellulose by providing cellulose fibres and at least one filler and/or pigment; combining the cellulose fibres and the at least one filler and/or pigment; and fibrillating the cellulose fibres in the presence of at least one filler and/or pigment, as well as the suspensions of nano-fibrillar cellulose obtained by this process and their uses.Type: ApplicationFiled: September 2, 2014Publication date: December 18, 2014Applicant: Omya International AGInventors: Patrick A.C. Gane, Joachim Schoelkopf, Daniel Gantenbein, Michel Schenker, Michael Pohl, Beat Kübler
-
Publication number: 20140360691Abstract: The invention relates to a method for producing paper, board or the like. In the method is obtained an aqueous filler dispersion, comprising particles of at least one first filler, the filler dispersion having a floc size distribution with original mean chord length value. The particles of the first mineral filler are brought into a contact with a cationic pre-treatment agent, which is capable of initiating flocculation of the filler particles in the dispersion, whereby a pre-treated filler dispersion comprising flocs, which comprise first mineral particles, is formed. The pre-treated filler dispersion is combined ed with a stock of fibres. The floc size distribution of the filler dispersion is changed with the pre-treatment agent, which is a natural and/or synthetic polymer, so that the mean chord length value increases at least with 2% from the original mean chord length value.Type: ApplicationFiled: January 16, 2013Publication date: December 11, 2014Applicant: KEMIRA OYJInventors: Matti Hietaniemi, Mikko Virtanen, Jonni Ahlgren
-
Patent number: 8900414Abstract: Fiber products, comprising in their body at least 20% by weight of cellulose fibers, and adequate amounts of an acid and a cationic retention aid for the acid, can be marked by means of a laser beam.Type: GrantFiled: October 21, 2008Date of Patent: December 2, 2014Assignee: Datalase, Ltd.Inventor: Adolf Käser
-
Patent number: 8894817Abstract: The invention provides methods and compositions for increasing the dry strength of paper. The invention utilizes a tailored strength agent whose size and shape is tailored to fit into the junction points between flocs of a paper sheet. The strength agents is in contact with the slurry for just enough time to collect at the junction points but not so much that it can migrate away from there.Type: GrantFiled: January 16, 2014Date of Patent: November 25, 2014Assignee: Ecolab USA Inc.Inventors: Weiguo Cheng, Mei Liu
-
Patent number: 8882964Abstract: The invention is directed towards methods, compositions, and apparatus for increasing the strength of paper made out of a furnish having a large proportion of OCC. The method involves the following steps: 1) Providing a paper furnish having a large amount of OCC in it, 2) adding strength promoter to the furnish prior to adding a strength agent to the furnish, 3) adding a strength agent to the furnish, and 4) making a paper product from the furnish. This method allows cheap OCC material to be used in a papermaking process without the quality problems that the anionic trash in OCC typically causes. Thus paper products having low costs and high quality can be produced.Type: GrantFiled: February 17, 2012Date of Patent: November 11, 2014Assignee: Nalco CompanyInventors: Yulin Zhao, Jun Li, Qing Long Rao, Weiguo Cheng
-
Patent number: 8877009Abstract: A pulp making process in which fibrous cellulosic material is pulped to form an aqueous suspension of cellulosic material, the suspension is drained through a screen to form a pulp sheet and that the pulp sheet is dried to form a dry market pulp, in which a water soluble cationic polymer is added to the suspension as the sole drainage aid wherein the water-soluble cationic polymer is either, i) a copolymer comprising (a) between 1 and 70 mole % (meth)acrylamide and (b) between 30 and 99 mole % (meth)acryloyloxyethyl-trimethyl ammonium chloride with an intrinsic viscosity between 5 and 9 dl/g; or ii) a hydrolysed homopolymer of vinylformamide comprising between 1 and 100 mole % vinyl amine units and having a K value of between 45 and 240. The process of the invention provides improved drainage time and solids content of the dewatered pulp.Type: GrantFiled: November 14, 2011Date of Patent: November 4, 2014Assignee: BASF SEInventors: Christian Jehn-Rendu, Joachim Hege, Detlef Kannengieβer
-
Publication number: 20140318728Abstract: Disclosed are methods for increasing the filler content of paper or paperboard, comprising (a) combining a heterogeneous polymer blend with a ground calcium carbonate filler; (b) combining the resulting mixture with a pulp slurry; and (c) processing the resulting slurry mixture to form a sheet of paper or paperboard. Also disclosed are methods of increasing the filler content of paper or paperboard comprising (1) combining either a heterogeneous polymer blend or a ground calcium carbonate filler with a pulp slurry, (2) combining the remaining component with the pulp slurry; and (c) processing the resulting pulp slurry mixture to form a sheet of paper or paperboard.Type: ApplicationFiled: April 30, 2013Publication date: October 30, 2014Applicant: Hercules IncorporatedInventor: Hercules Incorporated
-
Patent number: RE45383Abstract: 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: July 31, 2012Date of Patent: February 24, 2015Assignee: Nalco CompanyInventors: Michael R. St. John, Angela P. Zagala