Patents by Inventor Hidetaka Kubota

Hidetaka Kubota has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Thermoplastic resin compositions
    Patent number: 4525530
    Abstract: Thermoplastic resin compositions which comprise 20-70 parts by weight of a polyvinyl chloride resin and 80-30 parts by weight of a mixed composition of the following copolymers (A) and (B) at the following ratio:(A) 90-50% by weight of a copolymer which comprises 65-90 parts by weight of .alpha.-methylstyrene with 35-10 parts by weight of acrylonitrile and 0-5 parts by weight of a copolymerizable vinyl monomer and contains 30 parts by weight or more of a component having an .alpha.-methylstyrene content of 82% by weight or higher; and(B) 10-50% by weight of a graft copolymer obtained by reacting 35-80% by weight of a conjugated diene rubber and 65-20% by weight of a monomer comprising a monovinyl aromatic compound, an unsaturated nitrile compound or an alkyl methacrylate.These compositions have greatly improved heat resistance, especially resistance to heat distortion, and impact resistance over those of polyvinyl chloride resins.
    Type: Grant
    Filed: August 22, 1983
    Date of Patent: June 25, 1985
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Sigemi Mathumoto, Hidetaka Kubota, Fumiya Nagoshi