Patents by Inventor Masatoshi Akami

Masatoshi Akami 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 elastomer composition
    Patent number: 5081179
    Abstract: A thermoplastic elastomer composition comprising (A) 10-90 parts by weight of crystalline polypropylene, (B) 10-90 parts by weight of brominated butyl rubber, (C) 10-120 parts by weight of olefinic copolymer rubber to 100 parts by weight of (A)+(B), and (D) 10-150 parts by weight of process oil as plasticizer to 100 parts by weight (A)+(B), all of which are dynamically vulcanized in the presence of a peroxide crosslinking agent.The thermoplastic elastomer composition of this invention has a high gel ratio or gel content in part because brominated butyl rubber is vulcanized with peroxide. The composition has good elasticity, high mechanical strength, low compressively permanent set, excellent long-term heat stability, moldability, and gas impermeability and high damping characteristic.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: January 14, 1992
    Assignee: Advanced Elastomer Systems, L. P.
    Inventors: Eiji Sezaki, Yoshikazu Murakami, Shuji Shimada, Masaaki Saito, Masatoshi Akami, Hisafumi Endo
  • Thermoplastic elastomer composition
    Patent number: 5028662
    Abstract: A thermoplastic elastomer composition prepared by dynamically vulcanizing a composition comprised (A) polyolefin 5-50 wt. parts, (B) brominated butyl rubber 5-50 wt. parts, (C) polychloroprene rubber 5-50 wt. parts and (D) process oil 10-50 wt. parts in the presence of peroxide is disclosed.
    Type: Grant
    Filed: May 26, 1989
    Date of Patent: July 2, 1991
    Assignee: Advanced Elastomer Systems, L.P.
    Inventors: Eiji Sezaki, Masatoshi Isono, Masatoshi Akami, Hisafumi Endo