Patents by Inventor Doris R. Marx

Doris R. Marx 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).

  • Increased monomer conversion in emulsion polymerization
    Patent number: 8481657
    Abstract: A method for increasing the monomer conversion in a redox initiated emulsion polymerization has been discovered. The method comprises adding a composition comprising an effective amount of a substituted phenol to the polymerization medium. In this manner, high monomer conversion is obtained and the product has low gel contents and a low amount or no crosslinking.
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: July 9, 2013
    Assignee: Styron Europe GmbH
    Inventors: Hans A. Edel, Hagen Bartossek, Doris R. Marx
  • INCREASED MONOMER CONVERSION IN EMULSION POLYMERIZATION
    Publication number: 20110269930
    Abstract: A method for increasing the monomer conversion in a redox initiated emulsion polymerization has been discovered. The method comprises adding a composition comprising an effective amount of a substituted phenol to the polymerization medium. In this manner, high monomer conversion is obtained and the product has low gel contents and a low amount or no crosslinking.
    Type: Application
    Filed: January 7, 2010
    Publication date: November 3, 2011
    Inventors: Hans A. Edel, Hagen Bartossek, Doris R. Marx
  • Method for shortstopping polymerization processes in the manufacture of synthetic rubbers
    Publication number: 20040019165
    Abstract: This invention is related to a new shortstopping combination for use in stopping free radical and redox intiated polymerization is the combination of hydroxylamine (free base) (HA) and i-propylhydroxylamine (IPAH). It is more effective as related N-alcylated-hydroxylamines with regard to mooney stability. The combination is not corrosive to metals used in commercial equipment fr emulsion polymerization and prevents the rust formation and the formation of nitrosamins, coagulate and precipitate.
    Type: Application
    Filed: August 14, 2003
    Publication date: January 29, 2004
    Inventors: Hartmut K. Stiller, Hans A. R. Edel, Doris R. Marx, Heinz-Juergen Bogen, Ilona Guth, Klaus Hoehne, Wolfgang Krebes, Friedhelm Mathies