ANTIFOULING COMPOSITION

An antifouling coating composition comprising:(i) a (meth)acrylic silyl ester copolymer comprising at least 15 wt% silyl ester monomers, relative to the total weight of monomers present in the (meth)acrylic silyl ester copolymer; and/or(ii) a (meth)acrylic copolymer comprising 10 wt% or less of silyl ester monomers and 5.0 wt% or less of metal ester monomers, relative to the total weight of monomers present in the (meth)acrylic copolymer, which has a Tg of 10.0 °C or more;(iii) rosin, modified rosin or a metal salt of rosin or a modified rosin;(iv) biocides comprising:a. medetomidine; andb. one or more copper compounds having a copper content of at least 40 wt%, relative to the formula weight of the copper compound, wherein the coating composition as a whole comprises 10.0 wt% or less of biocides;(v) a (meth)acrylic copolymer comprising 10 wt% or less of silyl ester monomers and 5.0 wt% or less of metal ester monomers, relative to the total weight of monomers present in the (meth)acrylic copolymer, which has a Tg below 10.0 °C, preferably below 0 °C, more preferred below - 5 °C, even more preferred below -10 °C, comprisinga. monomer of formula II:wherein R4 is H or CH3, and R5 is a C1-C20 hydrocarbyl substituent; andb. 0.5 to 10 wt% of at least one carboxylic acid containing monomer; and(vi) at least 35 wt% of pigments, extenders and biocides combined, relative to the total weight of the coating composition as a whole.