Patents Examined by Hoke
  • Heat stabilizers for polyvinyl chloride (.beta.-amino-.beta.-arylacrylonitriles)
    Patent number: 3970622
    Abstract: Thermal stability of vinyl chloride polymer is improved by use of a compound of the formula ##EQU1## WHEREIN N IS 1 OR 2 AND R is alkyl, alkylene, aryl, arylene, lower alkyl-substituted aryl or arylene, or fluoro-substituted aryl or arylene, alone or in combination with a divalent metal salt of a fatty acid of 12-20 carbon atoms.
    Type: Grant
    Filed: November 24, 1975
    Date of Patent: July 20, 1976
    Assignee: American Cyanamid Company
    Inventors: William Baptist Hardy, Christos Savides