Other

Dainippon Ink and Chemicals, Incorporated

Hiroo Tanaka

Masataka Ooka

Makoto Tsuboi

Tetsuro Agawa

Katsuhiko Okada

Satoshi Hiyoshi

Eiichi Yoshikawa

Koji Tokunaga

Yasuhiro Yuki

Asako Oda

Takaaki Asakura

Masaya Hashimoto

Hiroshi Matsuzawa

Ryoichi Senju

An antifouling coating composition having an excellent coating film strength and also has markedly superior antifouling properties, and a novel resin which is useful as a matrix resin for the composition are provided. The antifouling coating composition comprises a vinyl polymer (A) having, as a repeating unit, a structural unit (a) represented by the following formula (1):(in the formula (1), Xand Xeach independently represents an ester bond or a carbonyl group; Rrepresents an ethylene structure which forms a covalent bond with the carbonyl carbon atom and Xin the formula (1) at the same or adjacent carbon atom; Rrepresents a gem-alkylene group, a vic-alkylene group, an arylmethylidene group or an arylethylene group; and Rand Rrepresent an alkyl group or an aryl group, or a hydrocarbon group having a carbonyl group, an ether bond or an ester bond) and an antifouling agent (B).

Antifouling coating composition and novel resin

A thermosetting powder coating composition has an average particle diameter of entire particles is within a range from 5 to 50 &mgr;m, an average circularity of the particles is 0.90 or more, and a circularity of particles having a maximum number frequency in circularity distribution is within a range from 0.98 to 1.00, prepared by spray-drying an organic solvent solution containing, as a coating film forming component, an epoxy group-containing vinyl copolymer (A) having a glass transition temperature of 40&deg; C. or higher, an epoxy group-containing vinyl copolymer (B) having a glass transition temperature of 0&deg; C. or lower and a polycarboxylic acid (C) as an essential component.

Thermosetting powder coating composition, method of preparation thereof and coated article therewith

A stable immobilized enzyme is obtained by reacting an enzyme with a substance having an N-halogenoamide group in a weak alkaline aqueous solution.

Method for immobilizing enzyme

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Osaka, Japan

Hiroo Tanaka