Patents Assigned to Farben Aktiengesellschaft
  • Polyether urethane, process for its preparation, flow-out agent and use of the polyether urethane
    Patent number: 5879754
    Abstract: The invention relates to a polyether urethane of the general formula ##STR1## wherein R.sup.1 denotes H or an alkyd (sic) radical of 1 to 8 carbon atoms,R.sup.2 denotes an alkylene radical of 2 to 10 carbon atoms or a cycloalkylene radical of 6 to 20 carbon atoms or an arylene radical of 6 to 20 carbon atoms,R.sup.3, R.sup.4 denote an optionally substituted alkyl radical of 1 to 8 carbon atoms or a joint ring whose members are R.sup.3 and R.sup.4,n denotes 2 to 1800m denotes 1 to 15.The invention further relates to a process for its preparation, to a flow-out agent for water-borne paints and to the use of the polyether urethanes as flow-out agents in water-borne, cathodically depositable electro-coating paints.
    Type: Grant
    Filed: August 22, 1994
    Date of Patent: March 9, 1999
    Assignees: Basf Lacke, Farben Aktiengesellschaft
    Inventors: Michael Geist, Gunther Ott, Helmut Fobbe, Klaus Arlt, Udo Strauss, Klaus Cibura
  • Copolymers containing hydroxyl groups, based on vinyl ester monomers, vinylaromatic monomers and hydroxylalkyl ester monomers, process for the preparation thereof and use thereof in coating compositions
    Patent number: 5322897
    Abstract: The invention relates to copolymers containing hydroxyl groups having a hydroxyl value of 50 to 200 mg of KOH/g and an average molecular weight (number average) of 1500 to 6000, which can be prepared by free-radical solution polymerization at temperatures of 130.degree. to 200.degree. C. of 5 to 25% by weight of vinyl ester monomers, 10 to 50% by weight of vinylaromatic monomers, 10 to 50% by weight of hydroxyalkyl ester monomers and, if desired, other monomers, in which the vinyl ester is initially used and the remaining monomers are added over a monomer addition period which is the same for all monomers as follows:i) The amount of the acrylate monomer added per unit time remains constant.
    Type: Grant
    Filed: December 19, 1990
    Date of Patent: June 21, 1994
    Assignees: BASF Lacke, Farben Aktiengesellschaft
    Inventors: Werner A. Jung, Udo Vorbeck
  • Coating agent based on polymers containing carboxyl groups and crosslinking agents containing epoxide groups, processes for the preparation of the coating agent and its use
    Patent number: 5276097
    Abstract: The present invention relates to coating agents containingA) one or more polymers containing carboxyl groups and having a number-average molecular weight of 500 to 8,000 and an acid number of 15 to 200 mg of KOH/g as the essential binder component andB) one or more compounds containing epoxide groups as crosslinking agents,wherein the compound B containing epoxide groups is a copolymer containing epoxide groups, has a number-average molecular weight M.sub.n of 300 to 5,000, preferably 500 to 3,500, and a heterogeneity (M.sub.w /M.sub.n), measured by gel permeation chromatography, of .ltoreq.3, preferably of .ltoreq.2, and has been prepared by continuous bulk polymerization at temperatures between 130.degree. and 350.degree. C. and pressures above 1 bar.The invention also relates to processes for the preparation of the coating agent and the use of the coating agents in automobile refinishing.
    Type: Grant
    Filed: January 24, 1992
    Date of Patent: January 4, 1994
    Assignees: BASF Lacke, Farben Aktiengesellschaft
    Inventors: Peter Hoffmann, Werner Alfons Jung, Elisabeth Kappes, Manfred Niessner