Patents Assigned to Hoescht Trespaphan GmbH
  • Biaxially oriented electrical insulation film having improved shrinkage at elevated temperatures
    Patent number: 6537652
    Abstract: A biaxially oriented polypropylene film is described. The n-heptane-insoluble content of the film has a chain isotacticity index, measured by 13-C-NMR spectroscopy, of at least 95%. In particular, the film should have the lowest possible shrinkage (transverse shrinkage and longitudinal shrinkage) at elevated temperatures. In addition, a process for the production of the polypropylene film and its use is described.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: March 25, 2003
    Assignee: Hoescht Trespaphan GmbH
    Inventors: Karl-Heinz Kochem, Kerstin Muller-Nagel