Acrylamide Containing Patents (Class 162/168.3)
  • Patent number: 10519602
    Abstract: 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: Grant
    Filed: June 14, 2018
    Date of Patent: December 31, 2019
    Assignee: Ecolab USA Inc.
    Inventors: Xiaojin Harry Li, Sergey M. Shevchenko, Ross Gray, Robert M. Lowe, David Jordan, Zhengang Zong
  • Patent number: 10407831
    Abstract: 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: Grant
    Filed: September 4, 2015
    Date of Patent: September 10, 2019
    Assignee: Kemira Oyj
    Inventors: Matti Hietaniemi, Jan-Luiken Hemmes, Vladimir Grigoriev, Asko Karppi
  • Patent number: 10316469
    Abstract: 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: Grant
    Filed: December 9, 2015
    Date of Patent: June 11, 2019
    Assignee: Ecolab USA Inc.
    Inventors: Meng Zhang, Na Xu, Jun Li, Yulin Zhao
  • Patent number: 10144818
    Abstract: 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: Grant
    Filed: October 15, 2015
    Date of Patent: December 4, 2018
    Assignee: ECOLAB USA INC.
    Inventors: Clay E. Ringold, David F. Townsend, Cornel Hagiopol, James W. Johnston
  • Patent number: 10132039
    Abstract: 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: Grant
    Filed: October 18, 2016
    Date of Patent: November 20, 2018
    Assignee: S.P.C.M SA
    Inventors: René Hund, Cyril Barriere
  • Patent number: 9995001
    Abstract: 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: Grant
    Filed: October 28, 2015
    Date of Patent: June 12, 2018
    Assignee: HARIMA CHEMICALS, INCORPORATED
    Inventors: Hirotaka Sato, Tadaaki Horii, Takanori Kurihara, Takahiro Fujiwara, Kazushige Inaoka
  • Patent number: 9873983
    Abstract: 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: Grant
    Filed: September 12, 2014
    Date of Patent: January 23, 2018
    Assignee: Ecolab USA Inc.
    Inventors: Bo Zhu, Meng Zhang, Jun Li, Na Xu, Yulin Zhao
  • Patent number: 9561974
    Abstract: 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: Grant
    Filed: January 17, 2012
    Date of Patent: February 7, 2017
    Assignee: Clearflow Group Inc.
    Inventors: Gerald Hanna, Alberto Valdes
  • Patent number: 9506195
    Abstract: 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: Grant
    Filed: February 18, 2016
    Date of Patent: November 29, 2016
    Assignee: KEMIRA OYJ
    Inventors: Junhua Chen, Chen Lu, Scott Rosencrance, Frank Zimmermann
  • Patent number: 9328462
    Abstract: 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: Grant
    Filed: June 17, 2013
    Date of Patent: May 3, 2016
    Assignee: KEMIRA, OYJ
    Inventors: Junhua Chen, Chen Lu, Scott Rosencrance, Frank Zimmermann
  • Patent number: 9017520
    Abstract: 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: Grant
    Filed: March 21, 2011
    Date of Patent: April 28, 2015
    Assignee: BASF SE
    Inventor: Peter C. Hayes
  • Publication number: 20150096698
    Abstract: 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: Application
    Filed: May 2, 2013
    Publication date: April 9, 2015
    Inventors: Daniel Gantenbein, Joachim Schoelkopf, Patrick A.C. Gane
  • Patent number: 8999112
    Abstract: 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: Grant
    Filed: January 30, 2013
    Date of Patent: April 7, 2015
    Assignee: S.P.C.M. SA
    Inventors: Gatien Faucher, Rene Hund
  • Patent number: 8999111
    Abstract: 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: Grant
    Filed: December 28, 2012
    Date of Patent: April 7, 2015
    Assignee: Ecolab USA Inc.
    Inventors: David J Castro, Mei Liu, Gary S Furman, Dorota Smoron, Shawnee M Wilson, Zhiyi Zhang
  • Patent number: 8980058
    Abstract: 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: Grant
    Filed: January 21, 2014
    Date of Patent: March 17, 2015
    Assignee: Goldeast Paper (Jiangsu) Co., Ltd
    Inventors: Yan Feng, Dequanjiang
  • Patent number: 8980056
    Abstract: 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: Grant
    Filed: November 15, 2010
    Date of Patent: March 17, 2015
    Assignee: Kemira Oyj
    Inventors: Chen Lu, Vladimir Grigoriev, Scott Rosencrance
  • Publication number: 20150065672
    Abstract: 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: Application
    Filed: September 16, 2011
    Publication date: March 5, 2015
    Applicant: BEIJING JUNLUN RUNZHONG SCIENCE & TECHNOLOGY CO., LIMITED
    Inventors: Jinben Wang, Xuefeng Shi, Xiaohui Xu, Hui Yang, Yilin Wang, Haike Yan
  • Publication number: 20150053361
    Abstract: 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: Application
    Filed: July 24, 2014
    Publication date: February 26, 2015
    Applicant: S.P.C.M. SA
    Inventors: René HUND, Gatien FAUCHER, Damien FOUGEROUSSE
  • Publication number: 20150041091
    Abstract: 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: Application
    Filed: October 1, 2013
    Publication date: February 12, 2015
    Applicant: Ecolab USA Inc.
    Inventors: David J. Castro, Rangarani Karnati, Shawnee M. Wilson, Weiguo Cheng, Mei Liu, Zhiyi Zhang
  • Publication number: 20150041092
    Abstract: 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: Application
    Filed: February 22, 2013
    Publication date: February 12, 2015
    Inventors: Matti Hietaniemi, Kimmo Strengell, Asko Karppi, Marko Kolari, Jaakko Ekman
  • Publication number: 20150041090
    Abstract: 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: Application
    Filed: August 7, 2014
    Publication date: February 12, 2015
    Inventors: John C. Harrington, Lance P. Perticone, Kane D. Sheldon, Bryan K. Spraul, Richard M. Verbrugge
  • Publication number: 20150027651
    Abstract: 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: Application
    Filed: August 6, 2014
    Publication date: January 29, 2015
    Applicant: BASF SE
    Inventors: Christian JEHN-RENDU, Joachim Hege, Detlef Kannengiesser
  • Patent number: 8926797
    Abstract: 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: Grant
    Filed: June 7, 2010
    Date of Patent: January 6, 2015
    Assignee: BASF SE
    Inventors: Christian Jehn-Rendu, Ellen Krueger, Hans-Joachim Haehnle, Martin Ruebenacker, Norbert Schall, Thomas Muehlenbernd
  • Publication number: 20150000852
    Abstract: 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: Application
    Filed: January 9, 2013
    Publication date: January 1, 2015
    Inventors: Mitchell Scott Chinn, Franck Andre Vanhecke
  • Patent number: 8920606
    Abstract: The present disclosure is directed to a continuous process for preparing cellulose reactive adducts of polyvinylamide.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: December 30, 2014
    Assignee: BASF SE
    Inventor: Matthew D. Wright
  • Patent number: 8916026
    Abstract: 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: Grant
    Filed: November 14, 2011
    Date of Patent: December 23, 2014
    Assignee: BASF SE
    Inventors: Christian Jehn-Rendu, Joachim Hege, Detlef Kannengieβer
  • Patent number: 8916024
    Abstract: 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: Grant
    Filed: November 26, 2012
    Date of Patent: December 23, 2014
    Assignee: Buckman Laboratories International, Inc.
    Inventors: Weiping Ban, Philip M. Hoekstra, Michael R. Elsey
  • Publication number: 20140371172
    Abstract: 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: Application
    Filed: September 2, 2014
    Publication date: December 18, 2014
    Applicant: Omya International AG
    Inventors: Patrick A.C. Gane, Joachim Schoelkopf, Daniel Gantenbein, Michel Schenker, Michael Pohl, Beat Kübler
  • Publication number: 20140360691
    Abstract: 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: Application
    Filed: January 16, 2013
    Publication date: December 11, 2014
    Applicant: KEMIRA OYJ
    Inventors: Matti Hietaniemi, Mikko Virtanen, Jonni Ahlgren
  • Patent number: 8900414
    Abstract: 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: Grant
    Filed: October 21, 2008
    Date of Patent: December 2, 2014
    Assignee: Datalase, Ltd.
    Inventor: Adolf Käser
  • Patent number: 8894817
    Abstract: 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: Grant
    Filed: January 16, 2014
    Date of Patent: November 25, 2014
    Assignee: Ecolab USA Inc.
    Inventors: Weiguo Cheng, Mei Liu
  • Patent number: 8882964
    Abstract: 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: Grant
    Filed: February 17, 2012
    Date of Patent: November 11, 2014
    Assignee: Nalco Company
    Inventors: Yulin Zhao, Jun Li, Qing Long Rao, Weiguo Cheng
  • Patent number: 8877009
    Abstract: 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: Grant
    Filed: November 14, 2011
    Date of Patent: November 4, 2014
    Assignee: BASF SE
    Inventors: Christian Jehn-Rendu, Joachim Hege, Detlef Kannengieβer
  • Publication number: 20140318728
    Abstract: 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: Application
    Filed: April 30, 2013
    Publication date: October 30, 2014
    Applicant: Hercules Incorporated
    Inventor: Hercules Incorporated
  • Publication number: 20140318727
    Abstract: 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: Application
    Filed: July 10, 2014
    Publication date: October 30, 2014
    Applicant: AKZO NOBEL N.V.
    Inventors: Fredrik Solhage, Joakim Carlen, Birgitta Johansson
  • Patent number: 8858759
    Abstract: Methods and compositions for improving dewatering efficiency during a papermaking or pulp drying process are disclosed. The methods can include a step of adding a dewatering agent solution to a location on a paper machine or pulp drying machine. The dewatering agent solution can include a soy based component. The soy based component can be soy flour or soy protein. The dewatering agent solution can be added to a wet end location of the pulp drying machine or paper machine or it can be sprayed onto a paper sheet prior to entering the press section of a paper machine. Additional dewatering agent solutions can also be added. The additional dewatering agent solutions can include cationic polymers or surfactants.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: October 14, 2014
    Assignee: Ecolab USA Inc.
    Inventors: Prasad Duggirala, Weiguo Cheng, Luiz W. Pace
  • Patent number: 8852400
    Abstract: The present disclosure provides for a method of preparing and using an emulsion for treating a papermaking process. The emulsion is an oil-in-water emulsion of alkenyl succinic anhydride emulsified with a polymer comprising at least one primary or secondary amine containing monomer. The method comprises adding an oil-in-water emulsion to the papermaking process; wherein the oil-in-water emulsion comprises alkenyl succinic anhydride emulsified with a polymer comprising at least one primary or secondary amine containing monomer; and wherein the oil-in-water emulsion is added in an amount sufficient to improve sizing of the paper produced by the papermaking process. The primary or secondary amine may be a secondary amine comprising diallylamine, and the polymer may be a diallylamine-acrylamide copolymer.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: October 7, 2014
    Assignee: Ecolab USA Inc.
    Inventors: Michael R St. John, David J Castro, Mei Liu
  • Patent number: 8852399
    Abstract: 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: Grant
    Filed: September 1, 2011
    Date of Patent: October 7, 2014
    Assignee: The Procter & Gamble Company
    Inventors: Charles William Neal, Charles Allen Redd, Jeffrey Glen Sheehan, Steven Daryl Smith, Robert Joseph McChain
  • Publication number: 20140284011
    Abstract: The invention relates to a method for manufacturing paper, paperboard or cardboard comprising the steps of (a) pulping an aqueous cellulosic material containing a starch; (b) preventing at least a portion of the starch from being microbially degraded by treating the aqueous cellulosic material containing the starch with one or more biocides; and (h) adding a dry and/or wet strength polymer to the cellulosic material.
    Type: Application
    Filed: August 24, 2012
    Publication date: September 25, 2014
    Applicant: ASHLAND LICENSING AND INTELLECTUAL PROPERTY LLC
    Inventors: Ludwig Krapsch, Christopher John McGregor, Jean Victor Mallard de La Varende
  • Patent number: 8840760
    Abstract: The object of the process of the invention is to increase the retention of starch in the sheet of paper in order to reduce operating costs and increase the physical characteristics of the paper. To that end, it has been envisaged that trivalent cationic salts are added, metered into the slurry or in the process for obtaining starch in powder form or by mixing a percentage of trivalent salts in powder form with the starch in powder form, seeking the solution of said salts in the slurry, so that they dissolve during the dispersion of the slurry in the process for obtaining the sheet of paper. Organic polymers such as polyacrylamides, polyvinylamides and polydadmacs could optionally be applied in addition to said salts.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: September 23, 2014
    Assignee: Oriol Gracia Grandia
    Inventor: Oriol Gracia Grandia
  • Publication number: 20140262090
    Abstract: Disclosed herein are methods of increasing retention and drainage in papermaking processes using high molecular-weight, water-soluble polymers.
    Type: Application
    Filed: March 10, 2014
    Publication date: September 18, 2014
    Applicant: Ecolab USA Inc.
    Inventors: Brett Brotherson, Peter E. Reed, Xiaojin Harry Li, William J. Andrews, Mingli Wei
  • Patent number: 8834677
    Abstract: The present invention provides tissue products having an MD/CD Tensile Ratio less than about 0.95, yet relatively high geometric tensile strength, such as geometric mean tensile strengths greater than about 1500 g/3? and more preferably greater than about 2000 g/3?. The combination of a tough, yet relatively supple sheet is preferably achieved by subjecting the embryonic web to a speed differential as it is passed from one fabric in the papermaking process to another, commonly referred to as rush transfer.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: September 16, 2014
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Maurizio Tirimacco, Erin Ann McCormick, Angela Ann Johnston, Mark John Hassman
  • Patent number: 8834680
    Abstract: The present invention relates to a filler composition comprising a) a filler, b) a cationic inorganic compound, c) a cationic organic compound, and d) an anionic polysaccharide, wherein the filler is present in an amount of at least about 1% by weight, based on the total weight of the composition, the anionic polysaccharide is present in an amount of about 1 to about 100 kg/ton, based on the weight of filler, and wherein the composition is substantially free from fibers.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: September 16, 2014
    Assignee: AKZO Nobel N.V.
    Inventors: Patrik Simonson, Michael Persson
  • Publication number: 20140216671
    Abstract: 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: Application
    Filed: January 21, 2014
    Publication date: August 7, 2014
    Applicant: Goldeast Paper (Jiangsu) Co., Ltd
    Inventors: YAN FENG, DEQUANJIANG
  • Patent number: 8790493
    Abstract: The present invention relates to a process for producing paper which comprises: (vii) providing an aqueous suspension comprising cellulosic fibers, (viii) adding to the suspension after all points of high shear a first polymer being a cationic polymer having a charge density above 2.5 meq/g; a second polymer, and a third polymer being an organic or inorganic anionic polymer; and (ix) dewatering the obtained suspension to form paper.
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: July 29, 2014
    Assignee: Akzo Nobel N.V.
    Inventors: Fredrik Solhage, Joakim Carlén, Birgitta Johansson
  • Patent number: 8790494
    Abstract: The invention provides a three layered reprographic paper having improved strength, stiffness and curl resistance properties, and a method for making same. The paper has a central core layer made largely of cellulose and bulked with a bulking agent such as a diamide salt. A starch-based metered size press coating is pressed on both sides of the core layer, wherein the starch has a high solid content. The coating forms a three layered paper having an I-beam arrangement with high strength outer layers surrounding a low density core.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: July 29, 2014
    Assignee: International Paper Company
    Inventors: Agne Swerin, Jay C. Song, Ladislav Bednarik, Peter F. Lee, Michael C. Herman, Sen Yang
  • Patent number: 8784611
    Abstract: The invention relates to a process for the production of paper or board comprising: adding a retention system to a stream of stock entering a paper machine head box, directing the stream of stock to a wire, de watering the stream of stock on the wire to form a paper web, and drying the paper web, wherein the retention system comprises a water-soluble cationic polymer, and nanocellulose acting like a micro particle, wherein the nanocellulose is added in an amount of less than 1% as active substance based on dry solids weight of the stock.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: July 22, 2014
    Assignee: Kemira OYJ
    Inventors: Ari Juppo, Ulf Stenbacka
  • Patent number: 8778140
    Abstract: A method of preparing a stable dispersion of flocculated filler particles for use in papermaking processes comprises use of microparticle prior to, simultaneous to, and/or after addition of a first flocculating agent to an aqueous dispersion of filler particles, followed by addition of a second flocculating agent to the dispersion and further optional shearing of the resultant filler flocs to the desired particle size resulting in shear resistant filler flocs with a defined and controllable size distribution. In addition, a neutralizing coagulant can be added to the dispersion to partially or completely neutralize the charge of the filler before the microparticle and/or the first flocculating agent is added.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: July 15, 2014
    Assignee: Nalco Company
    Inventors: Weiguo Cheng, Katherine M Broadus, Dorota Smoron, Shawnee M Wilson
  • Patent number: 8771467
    Abstract: A carrier-tape base paper making method and the base paper made thereby fall into the technical field of papermaking. According to performance requirements, the base paper is made through pulp conditioning and papermaking, in which different pulping and auxiliary materials for surface, intermediate and bottom layers are added. The method includes such steps as beating, conditioning, papermaking, calendering and reeling. The carrier-tape base paper features high strength, perfect waterproof and bonding performance, limited physical damages to electronic elements and satisfactory resilience.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: July 8, 2014
    Assignee: Zhejiang Jiemei Electronic & Technology Co., Ltd
    Inventor: Junyun Fang
  • Patent number: RE45383
    Abstract: 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: Grant
    Filed: July 31, 2012
    Date of Patent: February 24, 2015
    Assignee: Nalco Company
    Inventors: Michael R. St. John, Angela P. Zagala