Patents Examined by Veroncia P. Hoke
  • Flame retardant polyamides
    Patent number: 5071894
    Abstract: A flame retardant polyamide composition including flame retardant effective amounts of (a) an iron compound and (b) a char forming thermoplastic polymer having aromatic groups in the backbone. A char stabilizing compound (c) may also be present. In a preferred embodiment (b) is a polyphenylene ether. In a preferred embodiment, (c) is anhydrous zinc borate or a wollastonite.
    Type: Grant
    Filed: August 3, 1990
    Date of Patent: December 10, 1991
    Assignee: Stamicarbon B.V.
    Inventors: Edward D. Weil, Navin G. Patel, Robert M. Leeuwendal