Patents Assigned to Coathylene S.A.
  • Process for the production of polypropylene powders
    Patent number: 4510305
    Abstract: Polypropylene powder is produced by dissolving polypropylene in a solvent mixture at an elevated temperature, cooling the solution to below about 80.degree. while maintaining it in quiescent condition for precipitation of the polypropylene as particles which are composed of polypropylene grains, separating the precipitate, drying, and subjecting the dry particles to mechanical comminution.
    Type: Grant
    Filed: December 22, 1983
    Date of Patent: April 9, 1985
    Assignee: Coathylene S.A.
    Inventors: Hans H. Korsgen, Wolfgang Weller