Patents Assigned to Bridgestone Fire Company Limited
  • Patent number: 3981943
    Abstract: One shot mouldable and curable homogeneous rubber composition consisting mainly of polyisoprene rubber and a monomer mixture composed of divinylbenzene and .alpha.-methylstyrene in specifically limited weight ratios of the rubber/the monomer mixture and of divinylbenzene/.alpha.-methylstyrene and containing small amounts of organic peroxide and at least one of amine compound and phenol compound. The cured product of the rubber composition has high Young's modulus, tear energy and tensile strength retention. More improved cured rubbers having these physical properties well balanced in a high level can be easily obtained by additionally adding a small amount of sulfur or p-quinonedioxime to the above rubber composition.
    Type: Grant
    Filed: April 15, 1974
    Date of Patent: September 21, 1976
    Assignee: Bridgestone Fire Company Limited
    Inventors: Ryota Fujio, Nobuyuki Kataoka, Yoshihide Fukabori, Shiro Anzai