Patents by Inventor Bernhard Hirschmann

Bernhard Hirschmann has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Aqueous self-crosslinking copolymer dispersions, a process for preparing them and their use in binders for coating materials
    Patent number: 6515042
    Abstract: Aqueous self-crosslinking copolymer dispersions ABC obtainable by free-radically initiated copolymerization in the first stage of a monomer mixture A comprising olefinically unsaturated monomers A1 having carbonyl groups, unsaturated carboxylic acids or monoesters of unsaturated dicarboxylic acids A2, monomers A3 selected from vinylaromatic compounds, n-butyl methacrylate and also alkyl esters of unsaturated carboxylic acids or dialkyl esters of unsaturated dicarboxylic acids, esters A4 selected from alkyl esters of unsaturated carboxylic acids of dialkyl esters of unsaturated dicarboxylic acids, and other free-radically polymerizable monomers A5, and subsequent addition of a second monomer mixture B and further polymerization in the second stage, the mixture B comprising olefinically unsaturated monomers B1 corresponding to A1, esters B2 corresponding to A4, and monomers B3 corresponding to A5, and subsequently adding compounds C having hydrazine or hydrazide groups.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: February 4, 2003
    Assignee: Solutia Austria GmbH
    Inventors: Ingo Kriessmann, Rami-Raimund Awad, Hannelore Gsöll, Bernhard Hirschmann, Karl Rossmann
  • AQUEOUS SELF-CROSSLINKING COPOLYMER DISPERSIONS, A PROCESS FOR PREPARING THEM AND THEIR USE IN BINDERS FOR COATING MATERIALS
    Publication number: 20020147262
    Abstract: Aqueous self-crosslinking copolymer dispersions ABC obtainable by free-radically initiated copolymerization in the first stage of a monomer mixture A comprising olefinically unsaturated monomers A1 having carbonyl groups, unsaturated carboxylic acids or monoesters of unsaturated dicarboxylic acids A2, monomers A3 selected from vinylaromatic compounds, n-butyl methacrylate and also alkyl esters of unsaturated carboxylic acids or dialkyl esters of unsaturated dicarboxylic acids, esters A4 selected from alkyl esters of unsaturated carboxylic acids of dialkyl esters of unsaturated dicarboxylic acids, and other free-radically polymerizable monomers A5, and subsequent addition of a second monomer mixture B and further polymerization in the second stage, the mixture B comprising olefinically unsaturated monomers B1 corresponding to A1, esters B2 corresponding to A4, and monomers B3 corresponding to A5, and subsequently adding compounds C having hydrazine or hydrazide groups.
    Type: Application
    Filed: October 15, 1999
    Publication date: October 10, 2002
    Inventors: INGO KRIESSMANN, RAMI-RAIMUND AWAD, HANNELORE GSOLL, BERNHARD HIRSCHMANN, KARL ROSSMANN
  • Method for the two-stage preparation of aqueous autocrosslinking copolymer dispersions and their use for coating materials
    Patent number: 5939482
    Abstract: The invention concerns a two-stage method for the preparation of aqueous, self-crosslinking copolymer dispersions made from acrylate copolymers having acetoacetyl and carboxylic groups. The copolymers are neutralized with polyamines which act as crosslinking agents. These copolymers are useful in paints as binders that crosslink at room temperature or at elevated temperatures.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: August 17, 1999
    Assignee: Vianova Resins Aktiengesellschaft
    Inventors: Ingo Kriessmann, Rami-Raimund Awad, Hannelore Gsoell, Kurt Gossak, Bernhard Hirschmann