Patent ID: 7598299

Claim:
An antifouling coating composition comprising: a rosin as binder material, and a salt group-comprising polymer obtained by a process comprising the steps of: reacting an acid having an aliphatic, aromatic, or alkaryl hydrocarbon group comprising 5 or more carbon atoms with an amine- or phosphine-functional monomer of formula: wherein Y is O or NH, Z is N or P, R 1 is a hydrogen atom or a C 1 -C 4 alkyl group, R 2 is a C 2 -C 12 divalent hydrocarbon group, R 3 and R 4 independently represent a hydrogen atom or a C 1 -C 6 alkyl group or an optionally substituted phenyl group, to form a monomer comprising a salt of an amine-functional group and/or a salt of a phosphine-functional group, said salt comprising as counter-ion the anionic residue of an acid having aliphatic, aromatic, or alkaryl hydrocarbon group comprising at least 5 carbon atoms; and polymerizing at least one type of said salt-comprising monomer.