Patents Assigned to Kashima Kagaku, Co.
  • Rubber stopper for sealing
    Patent number: 4316941
    Abstract: A rubber stopper for sealing comprises a substrate of a rubber stopper which is partially or wholly coated with a fluorine-containing elastomer comprising a graft copolymer having rubber-like elasticity and having chemical linkages of fluorine-containing polymeric segments and organopolysiloxane segments at reactive sites of said segments.
    Type: Grant
    Filed: September 26, 1980
    Date of Patent: February 23, 1982
    Assignees: Asahi Glass Company Ltd., Kashima Kagaku, Co.
    Inventors: Tsukasa Eguchi, Mituharu Morozumi