Siloxane polymer antifouling paint composition containing polysiloxanes

Claim 1

An antifouling paint composition comprising as a film-forming component a vinyl-type copolymer obtained by copolymerization of (A) 1 to 50% by weight of a polymerizable unsaturated polysiloxane compound represented by the formula ##STR26## wherein X 1 represents a group of the formula ##STR27## where R 6 represents a hydrogen atom or a methyl group; R 1 , R 2 , R 3 and R 4 are identical or different and each represents an alkyl group having 1 to 4 carbon atoms, an aryl group or an aralkyl group; R 5 represents a hydroxyalkyl group having 1 to 3 hydroxyl groups and 1 to 6 carbon atoms; a is 0 when X 1 represents the group ##STR28## and an integer of 1 to 5 when X 1 represents the group ##STR29## and b is a number of 3 to 1,000, (B) 0 to 30% by weight of a polymerizable unsaturated alkoxysilane compound represented by the formula ##STR30## wherein X 2 represents a group of the formula ##STR31## where R 8 represents a hydrogen atom or a methyl group; R 7 represents an alkyl group having 1 to 4 carbon atoms; and d is 0 when X 2 represents the group ##STR32## and an integer of 1 to 5 when X 2 represents the group ##STR33## and (C) 20 to 99% by weight of a polymerizable unsaturated vinyl monomer other than the compounds (A) and (B) above, and further comprising 1 to 50 parts by weight, per 100 parts by weight of the vinyl-type copolymer, of a siloxane compound represented by the formula: ##STR34## wherein R 10 , R 11 , R 12 and R 13 are identical or different, and each represents an alkyl group having 1 to 4 carbon atoms, an aryl group or an aralkyl group; p is an integer of 1 to 5; and q is a number of 3 to 1,000 "and said composition being free of silanol-containing compounds".