Patents by Inventor Yasuto Takata

Yasuto Takata 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).

  • Cured or uncured compositions of homopolymers and copolymers of epihalohydrins
    Patent number: 4072734
    Abstract: A cured or uncured composition of a homopolymer or copolymer of an epihalohydrin comprising a homopolymer or copolymer of an epihalohydrin, a curing amount of a curing agent therefor and an acid acceptor, characterized in that the curing agent and acid acceptor are free from a cyclic carboxylic acid anhydride and consist, based on 100 parts by weight of the epihalohydrin homopolymer or copolymer, of(a) a component selected from the group consisting of 1 to 200 parts by weight of an acid salt of 1 mole of a polybasic carboxylic acid with 1 mole of 1,8-diazabicyclo(5,4,0)undecene-7 and a mixture of 1 to 200 parts by weight of a polybasic carboxylic acid and 1 to 10 parts by weight of a neutral salt of 1,8-diazabicyclo(5,4,0)undecene-7, and(b) 1 to 20 parts by weight of a specific metal compound of Group II and Group IVa of the periodic table of elements.
    Type: Grant
    Filed: September 12, 1975
    Date of Patent: February 7, 1978
    Assignee: Osaka Soda Co. Ltd.
    Inventors: Tetsuya Nakata, Nobuo Yamada, Akira Hashimoto, Yasuto Takata, Yukinari Bunnomori