Chugoku Marine Paints, Ltd.

Chuogoku Marine Paints, Ltd.

Fumio Hamazu

Makoto Tsuboi

Masaaki Oya

Naoya Nakamura

Satoshi Hiyoshi

Yasuto Hikiji

Yukio Kozono

Eiichi Yoshikawa

Hidetaka Arimura

Takaharu Doumae

Yoshio Yamada

The object of the present invention is to provide a silicone-based copolymer which has excellent long-term antifouling property even in a dry-wet alternate portion of a ship and the like or a portion thereof near the surface of water, is excellent also in mechanical strength and recoatability and exhibits high antifouling performance even if an antifouling agent is not added, and an antifouling coating composition containing the copolymer. The present invention provides, as the silicon-based copolymer, a metal-crosslinked organopolysiloxane-thio block vinyl copolymer [D] wherein an organopolysiloxane-thio block vinyl copolymer [C] having a carboxylic acid-containing vinyl copolymer block [A] formed from constitutional units derived from a polymerizable unsaturated carboxylic acid (a1) and constitutional units derived from at least one other polymerizable unsaturated monomer (a2) copolymerizable with the polymerizable unsaturated carboxylic acid, and a specific organopolysiloxane-thio block [B] is crosslinked with a divalent metal [M].

Metal-crosslinked organopolysiloxane-thio block vinyl copolymer and antifouling coating composition containing the metal-crosslinked copolymer

Disclosed is a silyl (meth)acrylate copolymer which comprises 20 to 80% by weight of (a) silyl (meth)acrylate constituent units (I), 0.01 to 40% by weight of (b) acrylic unsaturated monomer constituent units (II) and 5 to 79.9% by weight of &Ccirc; unsaturated monomer constituent units other than the constituent units (a) and (b). Also disclosed is a process for preparing the silyl (meth)acrylate copolymer, an antifouling paint composition comprising the copolymer, a coating film formed from the paint composition, a hull with the coating film and an antifouling method using the paint composition.

SILYL (METH) ACRYLATE COPOLYMERS, PROCESSES FOR PREPARING THE SAME, ANTIFOULING PAINT COMPOSITIONS CONTAINING THE SILYL (METH) ACRYLATE COPOLYMERS, ANTIFOULING COATING FILMS FORMED FROM THE ANTIFOULING PAINT COMPOSITIONS, ANTIFOULING METHODS USING THE ANTIFOULING PAINT COMPOSITIONS, AND HULLS OR UNDERWATER STRUCTURES COATED WITH THE ANTIFOULING COATING FILMS

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Otake, Japan

Fumio Hamazu