Patents Assigned to Chemtura Vinyl Additives GmbH
  • Stabilizer system for stabilizing halogen-containing polymers
    Patent number: 7671118
    Abstract: A stabilizer system for stabilizing halogen-containing polymers comprising a perchlorate salt and at least one indole compound, a composition comprising such a stabilizer system, process for stabilizing a chlorine-containing polymer using such a stabilizer system, and an article manufacture comprising PVC stabilized by such a stabilizer system.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: March 2, 2010
    Assignee: Chemtura Vinyl Additives, GmbH
    Inventors: Wolfgang Wehner, Hans-Helmut Friedrich
  • Prestabilization of halogen-containing polymers
    Patent number: 7612133
    Abstract: The invention relates to a process for preparing a stabilized suspension/emulsion polymer of halogen-containing monomers with addition of a polymer stabilizer mixture compatible with the polymerization medium prior to, during or directly after the polymerization process, and to the polymers prepared by this process.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: November 3, 2009
    Assignee: Chemtura Vinyl Additives GmbH
    Inventors: Karl-Josef Kuhn, Hans-Helmut Friedrich
  • Stabilizer system for stabilizing PVC
    Patent number: 7358286
    Abstract: Disclosed are stabilizer mixtures comprising at least a) one alkanolamine or one reaction product of a monofunctional or polyfunctional epoxide and ammonia or a monofunctional or polyfunctional dialkyl(aryl)amine or monoalkyl(aryl)amine, and b) one uracil or one initial product and an optional perchlorate salt.
    Type: Grant
    Filed: December 20, 2003
    Date of Patent: April 15, 2008
    Assignee: Chemtura Vinyl Additives GmbH
    Inventors: Thomas Hopfmann, Hans-Helmut Friedrich, Karl-Josef Kuhn, Wolfgang Wehner