Patents by Inventor Hidekatsu Gotoh

Hidekatsu Gotoh 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).

  • Ethylene-.alpha.-olefin-non-conjugated diene copolymer rubber composition
    Patent number: 5677382
    Abstract: An ethylene-.alpha.-olefin-non-conjugated diene copolymer rubber composition comprising a low molecular weight component copolymer composed of an ethylene-.alpha.-olefin-non-conjugated diene copolymer having a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 10 to 150, an .alpha.-olefin content of 30 to 60% by weight and an iodine value of 37 to 65, and a high molecular weight component copolymer composed of an ethylene-.alpha.-olefin-non-conjugated diene copolymer having a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 100 to 500, an .alpha.-olefin content of 15 to 50% by weight and an iodine value of 3 to 15, the ratio of the iodine value of the low molecular weight component copolymer to the iodine value of the high molecular weight component copolymer being at least 4/1. The above composition can inhibit a gel from being produced during processing and achieve a high degree of cross-linking and is excellent in compression set, shape-retention and sponge surface skin.
    Type: Grant
    Filed: December 5, 1995
    Date of Patent: October 14, 1997
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Shoei Tsuji, Hidekatsu Gotoh, Akihiko Morikawa, Fumio Tsutsumi, Yoji Mori