Patents Assigned to Toyo Seal Kogyo Kabushiki Kaisha (Toyo Seal Industries Co., Ltd.)
  • Process for producing acrylic rubber by copolymerizing acrylic ester and malonic acid derivative having active methylene group
    Patent number: 4154914
    Abstract: A process for producing acrylic rubber vulcanizable with curing agents in e thiuram series is provided. The process includes the copolymerization of an acrylic ester or esters with a malonic acid derivative having an active methylene group of the formula ##STR1## wherein R.sub.1 represents vinyl, allyl or methallyl, and X represents cyano or COOR.sub.2 in which R.sub.2 represents methyl, ethyl or propyl. The acrylic rubber thus produced shows better physical properties than the conventional one.
    Type: Grant
    Filed: August 3, 1978
    Date of Patent: May 15, 1979
    Assignee: Toyo Seal Kogyo Kabushiki Kaisha (Toyo Seal Industries Co., Ltd.)
    Inventor: Michinori Kuraya