Patent ID: 8741983
Filing Date: 2014-06-03
Classification: A01K,C09D

Abstract:
1. An antifouling coating composition comprising: (A) a metal-containing copolymer obtained by copolymerization of a polymerizable unsaturated monomer (a1) containing zinc, and an unsaturated monomer (a2) not containing a metal, and capable of radical polymerization, wherein the unsaturated monomer (a2) is at least one monomer (a21) of the formula: wherein R at least one monomer (a22) of the formula: wherein R wherein the metal-containing copolymer (A) comprises 17.9 to 40% by weight of component units derived from the polymerizable unsaturated monomer (a1) containing zinc and 60 to 82.1% by weight of component units derived from the unsaturated monomer (a2) not containing a metal, and capable of radical polymerization; (B) from 4.4 to 21.9 parts by weight of 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one per 100 parts by weight of the metal-containing copolymer (A); and (C) from 4.9 to 34.1 parts by weight of a metal pyrithione compound which is the zinc salt of 2-pyridinethiol-1-oxide or the copper salt of 2-pyridinethiol-1-oxide per 100 parts by weight of the metal-containing copolymer (A), wherein the antifouling coating composition is substantially free of cuprous oxide and an organotin, and wherein the antifouling composition has stationary antifouling properties for at least 12 months in sea water, such that when the antifouling composition, coated on steel plates painted with an anticorrosive paint, and the coated plates immersed in seawater for 12 months, the area of attachment on the plates of undersea organisms is 0%.