Patents by Inventor Otsugu Hayashi

Otsugu Hayashi 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).

  • Esters of an adduct of diolefinic polymer and unsaturated dicarboxylic compound
    Patent number: 4252727
    Abstract: A resin for coatings, particularly useful as a medium for printing inks and paints, comprising a modified polymer produced by adding at least one .alpha.,.beta.-unsaturated dicarboxylic acid or anhydride thereof to at least one liquid conjugated diolefinic polymer having a number average molecular weight of 150 to 3,000, a viscosity of 2 to 5,000 cps at 30.degree. C. and at least 50% of cis-1,4 structure and subjecting the resulting adduct to diesterification with at least one alcohol having 1 to 27 carbon atoms and whereby the acid value owing to the carboxyl group or the carboxylic anhydride group of the resulting modified polymer being made not more than 10.
    Type: Grant
    Filed: February 5, 1976
    Date of Patent: February 24, 1981
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Seimei Yasui, Minoru Hino, Kunio Izumi, Otsugu Hayashi