Patents by Inventor Udo Weisner

Udo Weisner 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).

  • Common solvent process for producing high molecular weight brominated rubber
    Patent number: 9273160
    Abstract: The invention relates to an energy efficient, environmentally favorable process for the preparation of brominated rubbers, in particular bromobutyl rubber, that uses a common medium for both solution polymerization and subsequent bromination of the rubber and which further exhibits an enhanced bromine usage due to the use of a oxidizing agent. More particularly, the invention relates to a process that employs a common aliphatic medium for both solution polymerization and bromination of rubber in the presence of a brominating agent and an oxidizing agent with intermediate removal of un-reacted monomers.
    Type: Grant
    Filed: January 17, 2011
    Date of Patent: March 1, 2016
    Assignee: LANXESS INTERNATIONAL SA
    Inventors: Adam Gronowski, Carsten Kreuder, John Lovegrove, Paul Nguyen, David Thompson, Hanns-Ingolf Paul, Rolf Feller, Udo Weisner
  • COMMON SOLVENT PROCESS FOR PRODUCING HIGH MOLECULAR WEIGHT BROMINATED RUBBER
    Publication number: 20130131281
    Abstract: The invention relates to an energy efficient, environmentally favourable process for the preparation of brominated rubbers, in particular bromobutyl rubber, that uses a common medium for both solution polymerization and subsequent bromination of the rubber and which further exhibits an enhanced bromine usage due to the use of a oxidizing agent. More particularly, the invention relates to a process that employs a common aliphatic medium for both solution polymerization and bromination of rubber in the presence of a brominating agent and an oxidizing agent with intermediate removal of un-reacted monomers.
    Type: Application
    Filed: January 17, 2011
    Publication date: May 23, 2013
    Applicant: LANXESS INTERNATIONAL SA
    Inventors: Adam Gronowski, Carsten Kreuder, John Lovegrove, Paul Nguyen, David Thompson, Hanns-Ingolf Paul, Rolf Feller, Udo Weisner