Patents Assigned to Ticora GmbH
  • Polyarylene sulfide foams and a process for their production
    Patent number: 5789452
    Abstract: A foamed polyarylene sulfide according to the invention has a density which is reduced by at least 50% compared with the theoretical density of nonfoamed material, and is expediently produced by subjecting a polyarylene sulfoxide as such or a mixture of one or more polyarylene sulfides with a polyarylene sulfoxide to heat treatment. The temperature of the heat treatment is in the range from 250.degree. to 400.degree. C.
    Type: Grant
    Filed: October 21, 1997
    Date of Patent: August 4, 1998
    Assignee: Ticora GmbH
    Inventors: Georg Frank, Jurgen Kulpe, Andreas Schleicher, Helmut Scheckenbach