Patents Assigned to Hirosuke Kojima
  • Method of preparing a low density, nonflammable polyvinyl foam composition
    Patent number: 4477599
    Abstract: A method of preparing a foamable polyvinyl system resin composition which renders a non-flammable, high strength to weight ratio foam product comprises, reacting at least 0.05 parts by weight of an organic radical initiator per 1 part by weight of polyvinyl system resin with the components consisting essentially of (a) at least one polyvinyl system resin (b) 2-100 parts by weight of at least one inorganic filler per 1 part by weight of polyvinyl system resin (c) an effective amount of at least one blowing agent.
    Type: Grant
    Filed: November 8, 1982
    Date of Patent: October 16, 1984
    Assignee: Hirosuke Kojima
    Inventors: Takayuki Otsu, Hirosuke Kojima