Patents Examined by Hoke V. P.
  • Pigment containing polyolefin composition
    Patent number: 3970632
    Abstract: A polymer composition, which comprises a polymer containing a quinophthalone pigment having the formula ##SPC1##Wherein the quinoline ring can have a substituent selected from the group consisting of halogen, lower alkyl, lower alkoxy, and carboxyl, and the ring A is a benzene ring or a naphthalene ring which can have a substituent selected from the group consisting of halogen, and --COW wherein W represents hydroxyl, lower alkoxyl or amino; and 0.005-5% by weight of a piperidine type or imidazolidine type ultraviolet absorbing agent.
    Type: Grant
    Filed: November 27, 1974
    Date of Patent: July 20, 1976
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Hirohisa Yoshiura, Toshiharu Arai, Masao Miyake, Kiyoshi Enriki