Coating compositions

Details Coating compositions Coating compositions

C - Chemistry, Metallurgy

09

D

400/7006

C09D 5/14 (2006.01) C08L 33/02 (2006.01) C09D 5/16 (2006.01)

Patent

CA 2000499

ABSTRACT OF THE DISCLOSURE An antifouling coating composition, e.g. for ships' hulls, comprises a biocide for marine organisms and a solution or dispersion of a binder polymer (A) which is an acid-functional polymer or a polymer hydrolysable to an acid-functional polymer. The coating composition contains a solution of a compound (B) of a polyvalent cation or of a precursor of such a compound at a molar ratio of polyvalent cations in the compound (B) to acid groups and/or groups hydrolysable to acid groups in the polymer (A) of 1:4 to 1:100. The polymer (A) and the compound (B) are capable of undergoing a crosslinking reaction when the composition is coated on a surface so that the polyvalent cation forms crosslinks between acid groups on different polymer mole- cules, and may be at least partially reacted in the com- position provided that it remains ungelled.

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