Utilizing An Ion Exchanger Or A Solid Sorptive Material Or Semipermeable Membrane Patents (Class 523/310)
  • Patent number: 9932419
    Abstract: A process for improving a latex comprising the steps of (a) providing a latex comprising a polymer binder, wherein said polymer binder is formed by polymerization of a monomer mixture comprising one or more ethylenically unsaturated carboxylic acid functional monomer, and (b) passing said latex comprising said polymer binder over a cation exchange resin.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: April 3, 2018
    Assignee: Rohm and Haas Company
    Inventors: Edward La Fleur, Himal Ray, Jose Antonio Trejo O'Reilly
  • Patent number: 9644055
    Abstract: A method for preparing a fluoropolymer aqueous dispersion, including: step (A) of preparing a fluoropolymer aqueous dispersion comprising a fluoropolymer having at least one selected from the group consisting of —SO2Y and —COOR (wherein Y is a halogen, and R is a C1 to C4 alkyl) by emulsion polymerization; step (B) of heating the fluoropolymer aqueous dispersion to 50° C. or higher; and step (C) of contacting the fluoropolymer aqueous dispersion with an ion exchange resin for cation exchange after step (B), thereby providing a purified fluoropolymer aqueous dispersion, the fluoropolymer aqueous dispersion being adjusted to pH 7 or lower from the end of the polymerization in step (A) to the end of step (C).
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: May 9, 2017
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Takashi Yoshimura, Kazuhiro Ohtsuka, Tadashi Ino, Noriyuki Shinoki, Masahiro Kondo
  • Patent number: 9376591
    Abstract: A water color paint system which includes water, pigment, and polymeric binder.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: June 28, 2016
    Assignee: Golden Artist Colors, Inc.
    Inventors: Ulysses Grosch Jackson, Mark Golden, James Martin Hayes
  • Patent number: 9217045
    Abstract: A process for the purification from ionic impurities of a fluoroionomer liquid composition, comprising: providing a liquid composition comprising at least one fluoroionomer (I-1) in a liquid medium, the liquid composition comprising ionic impurities; contacting the liquid composition with a solid particulate comprising at least one fluoroionomer (I-2) having ion exchange groups, wherein H+ or OH? ions are bound to at least a fraction of such ion exchange groups, and separating the liquid composition from the solid particulate.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: December 22, 2015
    Assignee: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.
    Inventors: Luca Merlo, Alessandro Ghielmi, Alexander Chistyakov
  • Patent number: 9127161
    Abstract: A silanol-group-containing-polysiloxane solution containing a silanol-group-containing polysiloxane is treated with a cation exchange resin in the presence of an alcohol solvent.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: September 8, 2015
    Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.
    Inventors: Kenji Takase, Hiroshi Kita
  • Patent number: 9068059
    Abstract: Disclosed is a fluorine-containing polymer aqueous dispersion in which a fluorine-containing polymer is dispersed using, as an emulsifier, a polyfluoroalkylphosphonic acid salt represented by the general formula: CnF2n+1(CH2CF2)a(CF2CF2)b(CH2CH2)cP(O)(OM1)(OM2)??[I], wherein M1 is a hydrogen atom, an alkali metal, an ammonium base, or an organic amine base, M2 is an alkali metal, an ammonium base, or an organic amine base, n is an integer of 1 to 6, a is an integer of 1 to 4, b is an integer of 1 to 3, and c is an integer of 1 to 3. This fluorine-containing polymer aqueous dispersion uses a polyfluoroalkylphosphonic acid salt with a low bioaccumulation potential as an emulsifier, and has excellent mechanical stability.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: June 30, 2015
    Assignee: Unimatec Co., Ltd.
    Inventors: Yoshiyama Kaneumi, Daisuke Murai
  • Patent number: 8969437
    Abstract: The invention provides a compound which is useful in production of a fluoropolymer and easy to be removed from the produced fluoropolymer, a method of producing the compound, and a method of producing a fluoropolymer using the compound. The invention provides a compound which is represented by Rf1—CH2O—CF2—CHF—Rf2—X, wherein Rf1 represents a fluoroalkyl group containing 1 to 5 carbon atoms, Rf2 represents a fluoroalkylene group containing 1 to 3 carbon atoms, X represents —COOM or —SO3M, and M represents one of H, K, Na, and NH4.
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: March 3, 2015
    Assignee: Daikin Industries, Ltd.
    Inventors: Nobuhiko Tsuda, Akinari Sugiyama
  • Patent number: 8937112
    Abstract: An aqueous fluoropolymer dispersion comprising fluoropolymer particles having an average particle size of about 10 to about 400 nm. The dispersion has a solids content of at least about 35 to about 70 wt % and comprises about 0.03 wt % to about 10 wt % anionic polyelectrolyte dispersing agent based on the weight of fluoropolymer solids. The dispersion has a Gel Time of at least about 100 seconds.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: January 20, 2015
    Assignee: E I du Pont de Nemours and Company
    Inventors: Robert John Cavanaugh, Clay Woodward Jones
  • Patent number: 8859645
    Abstract: The invention pertain to a process for purifying a fluoropolymer dispersion, said process comprising: (i) providing an aqueous dispersion (D) of at least one fluoropolymer [polymer (F)]comprising at least one fluorinated surfactant [surfactant (FS)], having a solids content (SC) of 15% by weight or more; (ii) adding to said aqueous dispersion (D) at least one non-ionic non-fluorinated surfactant [surfactant (NS)]; (iii) adjusting said solid content (SC) to less than 10% by weight, to obtain a diluted aqueous dispersion (dD); (iv) contacting said diluted aqueous dispersion (dD) with at least one adsorbing material, so as to obtain an aqueous dispersion of polymer (F) having a content of the fluorinated surfactant (FS) of less than 1 ppm based on the total weight of solids. Still an object of the invention is an aqueous fluoropolymer dispersion comprising less than 1 ppm of fluorinated surfactant.
    Type: Grant
    Filed: April 6, 2007
    Date of Patent: October 14, 2014
    Assignee: Solvay Solexis S.p.A.
    Inventors: Tiziana Poggio, Fabrizio Spada, Valeri Kapeliouchko
  • Publication number: 20140073718
    Abstract: The present invention relates to a process for removing volatile organic compounds (VOCs) from a liquid stream using multiple membranes that are permeable to the VOCs but impermeable to the liquid.
    Type: Application
    Filed: September 4, 2013
    Publication date: March 13, 2014
    Applicants: ROHM AND HAAS COMPANY, DOW GLOBAL TECHNOLOGIES LLC
    Inventors: James Kent Carpenter, Timothy C. Frank
  • Patent number: 8614265
    Abstract: A method of making a fluoropolymer dispersion by first providing a fluoropolymer dispersion comprising fluoropolymer particles and one or more fluorinated surfactants selected from fluorinated carboxylic acids or salts thereof having the general formula: [Rf—O-L-COO?]iXi+??(I) wherein L represents a linear fully fluorinated alkylene group, Rf represents a linear fully fluorinated aliphatic group or a linear fully fluorinated aliphatic group interrupted with one oxygen atom, Xi+ represents a cation having the valence i and i is 1, 2 or 3; then adding one or more non-fluorinated surfactants selected from anionic and non-ionic surfactants followed by reducing the total amount of the one or more fluorinated surfactants to an amount of not more than 500 ppm, for example not more than 250 ppm based on the total weight of the dispersion while maintaining or increasing the amount of solids in the dispersion.
    Type: Grant
    Filed: June 12, 2012
    Date of Patent: December 24, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Klaus Hintzer, Michael Jürgens, Harald Kaspar, Herbert Koenigsmann, Kai Helmut Lochhaas, Andreas R. Maurer, Werner Schwertfeger, Tilman Zipplies, Ludwig Mayer, Michael C. Dadalas, George G. I. Moore, Jay F. Schulz, Richard M. Flynn
  • Patent number: 8349523
    Abstract: To provide an electrolyte membrane having excellent dimensional stability even upon absorption of water, a high proton conductance and high power generation performance; and a process for producing the electrolyte membrane with a high productivity. An electrolyte membrane for polymer electrolyte fuel cells, which is made mainly of an ion exchange resin and reinforced with a nonwoven fabric made of fiber of a fluororesin wherein at least some of intersecting points of the fiber are fixed, and which has, as the outermost layer on one side or each side, a layer not reinforced, made of an ion exchange resin which may be the same as or different from the above ion exchange resin, wherein the fluororesin is an ethylene/tetrafluoroethylene copolymer having a melting point of at most 240° C., and the above fixing is fixing by fusion of the fiber.
    Type: Grant
    Filed: March 20, 2009
    Date of Patent: January 8, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Seigo Kotera, Hiroyuki Watabe, Shigeru Aida
  • Patent number: 8329782
    Abstract: A process for reducing fluorosurfactant content of a stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion comprising contacting the stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion with an anion exchange resin comprising a polymer and quaternary ammonium functional groups to reduce fluorosurfactant content, the functional groups being resistant to degradation which releases trialkylamines. The anion exchange resin is separated from the dispersion after the fluorosurfactant content has been reduced.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: December 11, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: James R. Combes, David William Johnson, Stephen Thomas Breske
  • Patent number: 8227526
    Abstract: A process for reducing fluorosurfactant content of a stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion comprising contacting the stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion with an anion exchange resin comprising a polymer and quaternary ammonium functional groups to reduce fluorosurfactant content, the functional groups being resistant to degradation which releases trialkylamines. The anion exchange resin is separated from the dispersion after the fluorosurfactant content has been reduced.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: July 24, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: James R. Combes, David William Johnson, Stephen Thomas Breske
  • Patent number: 8222322
    Abstract: A method of making a fluoropolymer dispersion by first providing a fluoropolymer dispersion comprising fluoropolymer particles and one or more fluorinated surfactants selected from fluorinated carboxylic acids or salts thereof having the general formula: [Rf—O-L-COO?]iXi+??(I) wherein L represents a linear fully fluorinated alkylene group, Rf represents a linear partially or fully fluorinated aliphatic group or a linear partially or fully fluorinated aliphatic group interrupted with one oxygen atom, Xi+ represents a cation having the valence i and i is 1, 2 or 3; then adding one or more non-fluorinated surfactants selected from anionic and non-ionic surfactants followed by reducing the total amount of the one or more fluorinated surfactants to an amount of not more than 500 ppm, for example not more than 250 ppm based on the total weight of the dispersion while maintaining or increasing the amount of solids in the dispersion.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: July 17, 2012
    Assignee: 3M Innovative Properties Company
    Inventors: Klaus Hintzer, Michael Jürgens, Harald Kaspar, Herbert Koenigsmann, Kai Helmut Lochhaas, Andreas R. Maurer, Werner Schwertfeger, Tilman Zipplies, Ludwig Mayer, Michael C Dadalas, George G. I. Moore, Jay F. Schulz, Richard M. Flynn
  • Patent number: 8138250
    Abstract: Waxes prepared from hydrogenated plant oils, such as castor and soybean, are formulated into aqueous ink and paper coating compositions. Ink compositions comprising these waxes and evaluated for their resistance to mar and abrasion achieved rub resistance and slip performance comparable to compositions utilizing conventional wax additives, which are generally derived from petroleum. The waxes in the inventive compositions have a low iodine value (ranging from approximately 2 to approximately 5), and a melting point between approximately 120 degrees to approximately 190 degrees F. (Mettler Drop Point). These naturally derived waxes are used as an alternative to petroleum and synthetically derived waxes in the manufacture of inks and coatings for paper and cellulosic products.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: March 20, 2012
    Assignee: H R D Corporation
    Inventors: Aziz Hassan, Gregory Borsinger
  • Patent number: 8063265
    Abstract: A hydrogel having a floatability where from 40% to 90% of a solution and/or suspension to be thickened are thickened starting from the surface of the liquid and the rest of the solution and/or suspension to be thickened is thickened starting from the bottom of the container, a process for preparing the hydrogel and also its use for absorbing blood and/or body fluids, especially in hygiene articles, or for thickening aqueous solutions and/or suspensions, especially for thickening medical wastes.
    Type: Grant
    Filed: October 28, 2004
    Date of Patent: November 22, 2011
    Assignee: BASF Aktiengesellschaft
    Inventors: Martin Beck, Volker Frenz, Anna Kowalski, Elisabeth Selzer, Ernst Jürgen Bauer, Harald Keller, Bernhard Steinmetz
  • Publication number: 20110263752
    Abstract: The present invention provides [1] a water dispersion for ink-jet printing containing chain-like particles each containing anionic organic pigment particles and a cationic polymer, wherein the ratio of organic pigment primary particles forming the chain-like particles to all the pigment primary particles contained in the water dispersion is 10% by number or more; [2] a water-based ink for ink-jet printing containing the water dispersion; [3] a method for producing a water dispersion for ink-jet printing as described above in [1]; and [4] a water-based ink for ink-jet printing containing a water dispersion produced through the method. The water dispersion and water-based ink for ink-jet printing of the present invention realize excellent optical density.
    Type: Application
    Filed: November 20, 2009
    Publication date: October 27, 2011
    Applicant: KAO CORPORATION
    Inventors: Atsushi Hiraishi, Masayuki Narita, Takahiro Sato, Kyoichi Shirota, Yasuhiro Doi, Hiroyuki Yoshida, Yusuke Shimizu
  • Patent number: 7994236
    Abstract: A method for preparing a polymer product, the method comprising polymerizing conjugated diene monomer, optionally together with vinyl aromatic monomer, within a hydrocarbon solvent by employing a lithium-containing initiator, thereby forming a living polymer cement, where about 0.04 to about 0.
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: August 9, 2011
    Assignee: Firestone Polymers, LLC
    Inventors: James H. Pawlow, William L. Hergenrother
  • Publication number: 20110068480
    Abstract: The present invention provides a semiconductor device which comprises a substrate, a first semiconductor chip on a substrate, a second semiconductor chip on the first semiconductor chip, and an adhesive sheet between the first and second semiconductor chips. The second semiconductor chip has a mirrored back surface, and the adhesive sheet contains a metal impurity ion trapping agent.
    Type: Application
    Filed: March 23, 2010
    Publication date: March 24, 2011
    Inventors: Hidekazu Hayashi, Hiroshi Tomita, Junya Sagara, Shinya Takyu, Norihiro Togasaki, Tetsuya Kurosawa, Yukiko Kitajima
  • Patent number: 7846995
    Abstract: Novel optionally hydrogenated nitrile rubbers distinguised by a very low ruthenium content are provided as well as a process for the removal of ruthenium-containing catalyst residues from a solution of optionally hydrogenated nitrile rubber by using specific functionalized ion-exchange resins.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: December 7, 2010
    Assignee: LANXESS Deutschland GmbH
    Inventors: Christopher Ong, Franz-Josef Mersmann
  • Patent number: 7807726
    Abstract: The invention provides a method for recovery of a fluorinated anionic surfactant from a basic anion exchange resin having quaternary ammonium groups, the method comprising eluting the anion exchange resin with a composition comprising an ammonium salt and a water miscible organic solvent. The method according to the invention may provide one or more of the following advantages. For example, the method can be designed to allow for recovery of substantially all of the fluorinated surfactant from a basic anion exchange resin having quaternary ammonium groups. Also, the liquid used for recovering the surfactant from the anion exchange resin is a simple liquid that can be readily and cost effectively manufactured. Further the process may be carried out in a convenient and easy manner. Furthermore, the method generally does not require large amounts of the eluting composition.
    Type: Grant
    Filed: March 10, 2006
    Date of Patent: October 5, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Andreas Maurer, Klaus Hintzer, Werner Schwertfeger, Egon Obermaier, Astrid Weber
  • Patent number: 7803277
    Abstract: A process for reducing the fluorosurfactant content of an aqueous fluoropolymer dispersion by filling a container with fluoropolymer dispersion, inserting into the container a fabric pouch containing a fluorosurfactant sorbent so that the sorbent contacts the fluorosurfactant-containing aqueous fluoropolymer dispersion in the container and retains the fluorosurfactant to reduce fluorosurfactant content of said fluorosurfactant-containing aqueous fluoropolymer dispersion, and removing the fabric pouch from the container.
    Type: Grant
    Filed: February 13, 2008
    Date of Patent: September 28, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Charles Joseph Noelke, Clay Woodward Jones, Daniel N. Levy, Michael Gene McClusky, David William Johnson
  • Patent number: 7795332
    Abstract: A method for removing a fluorinated carboxylic acid or salt thereof from an aqueous liquid by contacting the aqueous liquid with adsorbent particles. The fluorinated carboxylic acid or salt thereof is selected from the group consisting of partially fluorinated carboxylic acids or salts thereof and fully fluorinated carboxylic acids or salts thereof.
    Type: Grant
    Filed: May 25, 2006
    Date of Patent: September 14, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Klaus Hintzer, Michael Jürgens, Harald Kaspar, Herbert Koenigsmann, Kai Helmut Löchhaas, Andreas R. Maurer, Werner Schwertfeger, Tilman Zipplies, George G. I. Moore, Jay F. Schulz, Richard M. Flynn
  • Patent number: 7790041
    Abstract: A process for reducing the fluorosurfactant content of an aqueous fluoropolymer dispersion by filling a shipping container with fluoropolymer dispersion and contacting the dispersion with a fluorosurfactant sorbent in the shipping container.
    Type: Grant
    Filed: August 1, 2005
    Date of Patent: September 7, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Charles Joseph Noelke, Clay Woodward Jones, Michael Gene McClusky, David William Johnson
  • Publication number: 20100093893
    Abstract: A process for reducing fluorosurfactant content of a stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion comprising contacting the stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion with an anion exchange resin comprising a polymer and quaternary ammonium functional groups to reduce fluorosurfactant content, the functional groups being resistant to degradation which releases trialkylamines. The anion exchange resin is separated from the dispersion after the fluorosurfactant content has been reduced.
    Type: Application
    Filed: December 18, 2009
    Publication date: April 15, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: James R. Combes, David William Johnson, Stephen Thomas Breske
  • Publication number: 20100093894
    Abstract: A process for reducing fluorosurfactant content of a stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion comprising contacting the stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion with an anion exchange resin comprising a polymer and quaternary ammonium functional groups to reduce fluorosurfactant content, the functional groups being resistant to degradation which releases trialkylamines. The anion exchange resin is separated from the dispersion after the fluorosurfactant content has been reduced.
    Type: Application
    Filed: December 18, 2009
    Publication date: April 15, 2010
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: James R. Combes, David William Johnson, Stephen Thomas Breske
  • Patent number: 7683118
    Abstract: A process for preparing a fluoropolymer dispersion that is substantially anionic fluorinated surfactant free includes adding to a fluoropolymer dispersion a nonionic surfactant having a cloud point (CP) between 40 and 80° C. in a concentration of 1.5% to 50% by weight of the fluoropolymer, heating the dispersion up to a temperature Tc in a range of CP±10°C., decanting the dispersion in a reactor at Tc until obtaining a lower aqueous phase containing a concentrated fluoropolymer dispersion and an upper aqueous phase substantially not containing the fluoropolymer dispersion, washing the decanted dispersion with a solution of water and nonionic surfactant having a concentration of the nonionic surfactant of 0.5% to 50% by weight of the fluoropolymer, removing the upper aqueous phase from the upper part of the reactor, and discharge and recovery of the fluoropolymer dispersion.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: March 23, 2010
    Assignee: Solvay Solexis S.p.A.
    Inventors: Alberto Mirigliani, Evasio Deregibus, Valeri Kapeliouchko
  • Patent number: 7678848
    Abstract: A process to substantially remove fluorinated anionic surfactants from fluoropolymer dispersions comprising the following steps: a) addition to the fluoropolymer dispersion of one or more non fluorinated surfactants; b) contact of the dispersion with an anionic exchanger; c) separation of the dispersion from the anionic exchanger and recovery of the dispersion substantially fluorinated anionic surfactant free.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: March 16, 2010
    Assignee: Solvay Solexis S.p.A.
    Inventors: Marco Malvasi, Valeri Kapeliouchko
  • Patent number: 7671112
    Abstract: A method of making a fluoropolymer dispersion by first providing a fluoropolymer dispersion comprising fluoropolymer particles and one or more fluorinated surfactants selected from fluorinated carboxylic acids or salts thereof having the general formula: [Rf—O-L-COO?]iXi+??(I) wherein L represents a linear partially or fully fluorinated alkylene group or an aliphatic hydrocarbon group, Rf represents a linear partially or fully fluorinated aliphatic group or a linear partially or fully fluorinated aliphatic group interrupted with one or more oxygen atoms, Xi+ represents a cation having the valence i and i is 1, 2 or 3; then adding one or more non-fluorinated surfactants selected from anionic and non-ionic surfactants followed by reducing the total amount of the one or more fluorinated surfactants to an amount of not more than 500 ppm, for example not more than 250 ppm based on the total weight of the dispersion while maintaining or increasing the amount of solids in the dispersion.
    Type: Grant
    Filed: May 25, 2006
    Date of Patent: March 2, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Klaus Hintzer, Michael Jürgens, Harald Kaspar, Herbert Koenigsmann, Kai Helmut Lochhaas, Andreas R. Maurer, Werner Schwertfeger, Tilman Zipplies, Ludwig Mayer, Michael C. Dadalas, George G. I. Moore, Jay F. Schulz, Richard M. Flynn
  • Patent number: 7671111
    Abstract: A process for reducing the fluorosurfactant content of a stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion by passing dispersion through a first fixed bed of anion exchange resin to reduce fluorosurfactant content. The first fixed bed has a working zone which moves though the column as the ion exchange resin is saturated. The process includes monitoring a property of the dispersion as the dispersion exits the fixed bed to determine break though of the working zone indicating saturation of the fixed bed. The property being monitored is selected from the group consisting of pH and conductivity.
    Type: Grant
    Filed: February 9, 2006
    Date of Patent: March 2, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Charles Joseph Noelke, Steven H. Swearingen, David William Johnson
  • Patent number: 7666927
    Abstract: A process for reducing fluorosurfactant content of a stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion comprising contacting the stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion with an anion exchange resin comprising a polymer and quaternary ammonium functional groups to reduce fluorosurfactant content, the functional groups being resistant to degradation which releases trialkylamines. The anion exchange resin is separated from the dispersion after the fluorosurfactant content has been reduced.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: February 23, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: James R. Combes, David William Johnson, Stephen Thomas Breske
  • Patent number: 7666928
    Abstract: A process for reducing fluorosurfactant content of a fluorosurfactant-containing aqueous fluoropolymer dispersion stabilized with nonionic surfactant. The process includes reducing the fluorosurfactant content of the stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion to a predetermined level to provide a reduced surfactant dispersion, adding non-fluorinated anionic surfactant to the reduced fluorosurfactant dispersion, and concentrating the reduced fluorosurfactant dispersion. The non-fluorinated anionic surfactant is added in stages wherein a first portion is added to the dispersion prior to concentrating and a second portion of the non-fluorinated anionic surfactant is added to the dispersion after concentrating.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: February 23, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: David William Johnson, Robert John Cavanaugh
  • Patent number: 7666929
    Abstract: A process for reducing fluorosurfactant content of a stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion. The process includes providing a fixed bed of anion exchange resin having anion exchange groups with counter ions. The anion exchange resin is treated to replace at least some the counter ions with counter ions of non-fluorinated anionic surfactant. The stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion is passed through the treated fixed bed of anion exchange resin.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: February 23, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Kenneth Scott Teter, David William Johnson
  • Patent number: 7659329
    Abstract: A process for reducing fluorosurfactant content of a stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion comprising passing said stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion through a fixed bed of ion exchange resin beads comprising a polymer and functional groups to reduce fluorosurfactant content, the ion exchange resin beads being monodisperse.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: February 9, 2010
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Steven H. Swearingen, William George O'Brien, Charles Joseph Noelke
  • Patent number: 7619018
    Abstract: A process for reducing fluorosurfactant content of a stabilized fluorosurfactant-containing aqueous fluoropolymer dispersion containing ferric ions by contacting the fluoropolymer dispersion with strong base anion exchange resin to reduce fluorosurfactant content to a predetermined level, the anion exchange resin being in the hydroxide form, separating the dispersion from the anion exchange resin, and adding an effective amount of chelating agent having an equilibrium constant when complexed with iron of at least 1018 prior to the contacting with the ion exchange resin for complexing ferric ions to prevent scum formation.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: November 17, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: David William Johnson, Robert John Cavanaugh
  • Patent number: 7612139
    Abstract: A stabilized aqueous fluoropolymer dispersion comprising: about 30 to about 70 weight % non-melt-processible fluoropolymer particles having an SSG of less than about 2.225, said fluoropolymer particles comprising a core of high molecular weight polytetrafluoroethylene and a shell of lower molecular weight polytetrafluoroethylene or modified polytetrafluoroethylene; and about 2 to about 11 weight % of aliphatic alcohol ethoxylate nonionic surfactant based on the weight of said fluoropolymer, wherein said dispersion is essentially free of surfactants containing aromatic groups and contains less than 300 ppm of fluorosurfactant based on the weight of said dispersion.
    Type: Grant
    Filed: May 15, 2006
    Date of Patent: November 3, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Clay Woodward Jones, David William Johnson
  • Patent number: 7514483
    Abstract: An aqueous dispersion of polytetrafluoroethylene (PTFE) comprising from 55 to 70 mass % of PTFE fine particles having an average particle diameter of from 0.1 to 0.5 ?m, from 0.0001 to 0.02 mass %, based on PTFE, of a specific C8 fluorine-containing carboxylic acid salt (APFO) such as ammonium perfluorooctanoate, from 1 to 20 mass %, based on PTFE, of a specific nonionic surfactant and from 0.01 to 0.3 mass %, based on PTFE, of a specific C5-7 fluorine-containing carboxylic acid salt such as ammonium perfluorohexanoate. The aqueous dispersion of PTFE has excellent properties which can form crack-resistant coatings which do not undergo coloration during baking or form problematic ionic impurities by improving the friction stability of aqueous PTFE dispersions even at APFO concentrations without viscosity increase.
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: April 7, 2009
    Assignee: Asahi Glass Company, Limited
    Inventors: Jun Hoshikawa, Shinya Higuchi, Yasuhiko Matsuoka
  • Patent number: 7514484
    Abstract: To obtain a high concentration aqueous PTFE dispersion containing PTFE at a concentration of from 60 to 75 mass % by dissolving from 0.001 to 0.1 mass %, based on the mass of PTFE, of a specific carboxylic acid salt such as ammonium laurate in a low concentration aqueous dispersion of polytetrafluoroethylene (PTFE) comprising from 1 to 40 mass % of PTFE fine particles, from 0.0001 to 0.02 mass %, based on the mass of PTFE, of a specific fluorine-containing carboxylic acid type emulsifier (for example, ammonium perfluorooctanoate), and from 1 to 20 mass %, based on the mass of PTFE, of a specific nonionic surfactant, and then concentrating the low concentration aqueous dispersion of PTFE.
    Type: Grant
    Filed: May 1, 2006
    Date of Patent: April 7, 2009
    Assignee: Asahi Glass Company, Limited
    Inventors: Jun Hoshikawa, Shinya Higuchi, Yasuhiko Matsuoka
  • Patent number: 7468403
    Abstract: The present invention provides a method of purifying an aqueous fluoropolymer emulsion by which fluorine-containing surfactants can be removed without lowering the dispersibility of the aqueous fluoropolymer dispersions. The present invention provides a method of purifying an aqueous fluoropolymer emulsion comprising; purifying an aqueous fluoropolymer emulsion by a specific technique of concentration wherein the aqueous fluoropolymer emulsion comprises a fluoropolymer and a fluorine-containing surfactant, said specific technique of concentration comprises concentration by phase separation, electric concentration and/or ion exchange concentration, and said concentration by phase separation, electric concentration and/or ion exchange concentration is carried out for removing the fluorine-containing surfactant.
    Type: Grant
    Filed: October 6, 2003
    Date of Patent: December 23, 2008
    Assignee: Daikin Industries, Ltd.
    Inventors: Yasukazu Nakatani, Kenji Ichikawa
  • Publication number: 20080262122
    Abstract: A process for producing a resin-coated pigment capable of providing an ink and a paint being superior in dispersion stability of a pigment and having rapid drying property, high gloss and density without containing those such as an organic solvent and a salt that cause the lowering of performance of pigment dispersion, characterized in that a pigment is dispersed in an aqueous solution in which an anionic group-containing resin is dissolved in the presence of a basic compound and then, the anionic group-containing resin is precipitated on the surface of the pigment by removing the basic compound in the aqueous solution, using an ion exchange means.
    Type: Application
    Filed: May 25, 2005
    Publication date: October 23, 2008
    Applicant: SAKATA INX CORP.
    Inventors: Yoshiaki Ueno, Hideo Hisamoto, Akemi Hisamoto, Tomohiro Kita, Akinori Moriyama, Kayoko Ishizaki
  • Publication number: 20080097009
    Abstract: A method for producing an organic solvent dispersion of an intrinsically conductive polymer which comprises a step of deionizing an aqueous colloidal dispersion of an intrinsically conductive polymer by the passing of liquid, thereby clearing the intrinsically conductive polymer of cations adhering thereto, and a subsequent step of substituting water in the aqueous colloidal dispersion by an organic solvent. This method permits easy production of an organic solvent dispersion of an intrinsically conductive polymer which can be applied to various uses as electrode materials, antistatic agents, UV light absorbers, heat ray absorbers, electromagnetic wave absorbers, sensors, electrolyte for electrolytic capacitors, and electrodes for secondary batteries.
    Type: Application
    Filed: February 10, 2006
    Publication date: April 24, 2008
    Inventors: Tadayuki Isaji, Osamu Fujimoto
  • Patent number: 7361700
    Abstract: There is provided a method for producing colorants which can exhibit excellent color development even in a small amount and are low in thixotropy. The constituent feature of the present invention comprises: enhancing the molecular extinction coefficient of the coloring matter substance by ion exchanging method, to afford a room for increasing B (resin) of P/B; then a composition is designed and employed to enhance the effect increasing the polar group concentration which is a role of resin and the quality of the effect; it thus becomes possible to achieve the limit value of the molecular extinction coefficient as much as possible and to eliminate the factors adversely affecting the present process.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: April 22, 2008
    Assignee: Taisei Chemical Industries, Ltd.
    Inventors: Takashi Sunamori, Fumiyuki Kadowaki, Koichi Noguchi, Hideto Uchida, Kazuki Torinoumi
  • Patent number: 7358296
    Abstract: Fluorine-containing emulsifiers can be removed from fluoropolymer dispersions by adding to the dispersion a non ionic emulsifier, removing the fluorine-containing emulsifier by contact with an anion exchanger and separating the dispersion from the anion exchanger. The resulting dispersions can be concentrated and used for coating applications.
    Type: Grant
    Filed: October 21, 2004
    Date of Patent: April 15, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: Hermann Blädel, Klaus Hintzer, Gernot Löhr, Werner Schwertfeger, Reinhard Albert Sulzbach
  • Patent number: 7304101
    Abstract: Anionic species are removed from aqueous dispersions of ionic fluoropolymers using anion exchange resins. In some embodiments, cationic species are also removed using cation exchange resins.
    Type: Grant
    Filed: July 19, 2004
    Date of Patent: December 4, 2007
    Assignee: 3M Innovative Properties Company
    Inventors: Klaus Hintzer, Kai H. Lochhaas, Tanja Zeif, Steven J. Hamrock, Harold T. Freemyer
  • Patent number: 7297744
    Abstract: A process for preparing fluoropolymer dispersions, substantially free from anionic fluorinated surfactants, and with a coagulum amount <0.1% by weight, comprising: a) step a1) addition of: a non ionic surfactant having cloud point (CP) between 40° and 80° C., in an amount from 1.5% to 50% by weight on the dispersion fluoropolymer; and optionally an electrolyte to bring the specific conductivity of the dispersion to values in the range 130-8,000 ?S/cm; optionally a buffer agent to have a pH between 2 and 12 to a fluoropolymer dispersion obtainable by an emulsion polymerization process; step a2): heating of the dispersion obtained in a1) up to a temperature Tc in the range CP±10° C.; decantation without stirring, at the temperature Tc, until obtaining the dispersion separation in two aqueous phases, of which the lower one containing the fluoropolymer is discharged; b) step b1): the dispersion obtained in step a2) is optionally additioned of an electrolyte and of a non ionic surfactant as in a1).
    Type: Grant
    Filed: October 20, 2004
    Date of Patent: November 20, 2007
    Assignee: Solvay Solexis S.p.A.
    Inventors: Valeri Kapeliouchko, Marco Malvasi
  • Patent number: 7238735
    Abstract: A process for producing an aqueous dispersion of purified polytetrafluoroethylene (PTFE), comprising passing a crude aqueous dispersion of PTFE comprising from 10 to 50 mass % of PTFE fine particles having an average particle diameter of from 0.1 to 0.5 ?m, from 0.05 to 1.0 mass %, based on PTFE, of a fluorine-containing carboxylic acid salt (APFO) and from 2 to 20 mass %, based on PTFE, of a nonionic surfactant through a column packed with a weak basic AER upward at a linear velocity of 0.1 to 2 mm/sec with a contact time of 0.2 to 4 hours to reduce the APFO concentration. The process can increase the absorption of APFO by the anion exchange resin, prevents agglomeration of PTFE during passage and makes it easy to elute the absorbed APFO.
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: July 3, 2007
    Assignee: Asahi Glass Company, Limited
    Inventors: Jun Hoshikawa, Shinya Higuchi, Yasuhiko Matsuoka
  • Patent number: 7118689
    Abstract: Polychloroethylene, e.g., trichioroethylene and perchloroethylene, is stabilized with a stabilizing amount of a stable free radical stabilizer, e.g., a material having the 2,2,6,6-tetra(lower alkyl)-1-piperidinyloxy-yl free radical group, such as 2,2,6,6-tetramethyl-4-hydroxy-1-piperidinyloxy, or the 2,2,5,5-tetra(lower alkyl)pyrrolidinyloxy group, such as 2,2,5,5-tetramethyl pyrrolidinyloxy. Stable free radical stabilizer is removed from a polychloroethylene composition containing same by contacting the composition with silica, e.g., precipitated silica.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: October 10, 2006
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Earl M. Gorton, Ronald D. Olinger
  • Patent number: 7015263
    Abstract: A process for recovering fluoropolymers, which comprises contacting an ion exchange membrane comprising a fluoropolymer having carboxylic acid groups (hereinafter referred to as a C-polymer) and a fluoropolymer having sulfonic acid groups (hereinafter referred to as a S-polymer) and having inorganic particles deposited on the surface, with a solvent to let it swell and to remove the inorganic particles from the surface, then, contacting it with a solvent which is a good solvent for the S-polymer and a poor solvent for the C-polymer to obtain a solid composed mainly of the C-polymer and a solution having the S-polymer dissolved therein, and recovering them by solid-liquid separation.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: March 21, 2006
    Assignee: Asahi Glass Company, Limited
    Inventors: Seisaku Kumai, Yutaka Fukatsu, Ryota Tokura
  • Patent number: 6833403
    Abstract: Fluorine-containing emulsifiers can be removed from fluoropolymer dispersions by adding to the dispersion a nonionic emulsifier, removing the fluorine-containing emulsifier by contact with an anion exchanger and separating the dispersion from the anion exchanger. The resulting dispersions can be concentrated and used for coating applications.
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: December 21, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Hermann Blädel, Klaus Hintzer, Gernot Löhr, Werner Schwertfeger, Reinhard Albert Sulzbach