Patents Assigned to Huls Silicone GmbH
  • Process for producing the viscosity, long shelf life silicone resin solutions
    Patent number: 5652302
    Abstract: The invention is an improvement in a process for producing silicone resins, to produce a silicone resin that has a high dynamic viscosity of at 293.degree. K. of from about 40 to about 300 mPas, a long shelf life, and a siloxane content of from about 50 to about 70 ma %, by the condensation of oligomeric siloxanes in concentrated solutions, by carrying out the condensation by heating at reflux and in the presence of a metal containing catalyst and dicarboxylic acid.
    Type: Grant
    Filed: January 30, 1991
    Date of Patent: July 29, 1997
    Assignee: Huls Silicone GmbH
    Inventors: Lothar Heinrich, Helga Sadowski, Gunter Beuschel