Patents Assigned to Chemiefaser Lenzing AG
  • Flame-retardant polyacrylonitrile fiber
    Patent number: 4447568
    Abstract: A polyacrylonitrile fiber which has flame-retardant properties, is produced by dry spinning, has an acrylonitrile content of at least 85% by weight in the parent polymer and contains as flame retarder 15 to 40% by weight of tris-2,3-dibromopropyl isocyanurate, based on the polymer. The flame-retardant effect can be further increased by a content of up to 10% by weight of one or more synergistic compounds.
    Type: Grant
    Filed: May 10, 1983
    Date of Patent: May 8, 1984
    Assignees: Chemie Linz AG, Chemiefaser Lenzing AG
    Inventors: Gerhard Stern, Klaus Weinrotter