Patents by Inventor Sascha Huebers

Sascha Huebers 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).

  • Polymeric urea-urethane rheology control agents and a process for their preparation
    Patent number: 6870024
    Abstract: The invention relates to a polymeric urea-urethane obtainable by first reacting a diisocyanate with a polyol to form a doubly NCO-terminated urethane prepolymer. Further reaction is subsequently carried out with a mixture of a primary monoamine and a primary diamine. After the second reaction the polymeric urea-urethane present is substantially free of isocyanate and of the monoamine and diamine used. It can be used as an agent for controlling the rheology of liquid polymers or polymer solutions.
    Type: Grant
    Filed: September 9, 2003
    Date of Patent: March 22, 2005
    Assignee: BYK-Chemie GmbH
    Inventors: Karlheinz Haubennestel, Stefan Moessmer, Sascha Huebers, Baerbel Gertzen, Holger Heilmann
  • Polymeric urea-urethane rheology control agents and a process for their preparation
    Publication number: 20040127674
    Abstract: The invention relates to a polymeric urea-urethane obtainable by first reacting a diisocyanate with a polyol to form a doubly NCO-terminated urethane prepolymer. Further reaction is subsequently carried out with a mixture of a primary monoamine and a primary diamine. After the second reaction the polymeric urea-urethane present is substantially free of isocyanate and of the monoamine and diamine used. It can be used as an agent for controlling the rheology of liquid polymers or polymer solutions.
    Type: Application
    Filed: September 9, 2003
    Publication date: July 1, 2004
    Inventors: Karlheinz Haubennestel, Stefan Moessmer, Sascha Huebers, Baerbel Gertzen, Holger Heilmann