| abstract |
[I] An antifouling coating composition comprising an antifouling agent (A), a film forming copolymer of 1000 to 50,000 in number average molecular weight (B), this copolymer containing structural units derived from a trialkylsilyl ester of polymerizable unsaturated carboxylic acid in an amount of 20 to 65% by weight, and a chlorinated paraffin (C). It is preferred that the component (C) be contained in the composition in an amount of 18 to 65 parts by weight per 100 parts by weight of the component (B). It is also preferred that the composition contain a (meth)acrylic ester polymer of 1000 to 100,000 in number average molecular weight (D) that is compatible with the component (B), an inorganic dehydrating agent (E), a flake pigment (F), zinc flower (G), etc. n [II] A composition comprising the components (A), (B) and (D) wherein (B) : (D) = 100 : 10 to 500. [III] A composition comprising the components (B) and (G) wherein (B) : (G) = 100 : 1 to 1000. A coating film formed from each of the above antifouling coating compositions, an antifouling method in which use is made of each of the above antifouling coating compositions and a hull or an underwater structure coated with the coating film. The compositions [I] and [II] enable forming an antifouling coating film which is excellent in cracking resistance, resistance to peeling from ship bottom materials and primer layers, antifouling properties and consumability (self-polishing properties). Further, these antifouling coating compositions are excellent in storage stability. The composition [III] gives a coating film which is excellent in peeling resistance and cracking resistance especially in an environment of alternate dry and wet. |