DESCRIZIONE
The present invention provides an antifouling coating composition comprising:
(i) 30-95 wt% polysiloxane-based binder and/or a siloxane copolymer;
(ii) 0.1-30 wt% of a copolymer comprising repeat units of formulae (A) and (B1) and/or (B2); and
(iii) 0-30 wt% antifouling agent,
wherein said repeat units of formulae (A) and (B1) and/or (B2) are: [Image Omitted] [Image Omitted] wherein in formula (A)
R is selected from H and C1-6 alkyl, and preferably H and methyl;
X1 is selected from COO and OCO, preferably COO;
m is 0 or 1, preferably 1;
R1 is selected from substituted or unsubstituted, linear or branched, C1-8 alkylene;
n is 0 or 1; and
R2 is poly(alkylene oxide),
in formulae (B1) and (B2)
R is selected from H and C1-6 alkyl;
X2 is selected from COOR3 and OCOR3 and preferably COOR3;
o is 0 or 1, preferably 1;
R3 is selected from substituted or unsubstituted, linear or branched, C1-8 alkylene; each R4 is independently selected from C1-10 alkyl and C5-10 aryl; and
in formula (B1) q is an integer from 1-160
and in formula (B2)
q is 0 or an integer from 1-80
R5 is selected from C1-10 alkyl, C5-10 aryl or O-Si(R6)3, wherein R6 is independently selected from C1-10 alkyl and C5-10 aryl.