Sumitomo Chemical Company, Limited

Kunio Izumi

Seimei Yasui

Minoru Hino

Otsugu Hayashi

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.

Growing community of inventors

Soka, Japan

Kunio Izumi