Curable organopolysiloxane antifouling composite coating film, and antifouling substrate coated with the same

An antifouling composite coating film, comprising:

• (I) a urethane resin anticorrosive coating film formed from an anticorrosive paint composition comprising a main agent selected from the group consisting of a polyol and a glycidyl ether, and said composition further comprises an isocyanate curing agent and a tertiary amine compound as a catalyst for accelerating curing, and
• (II) an antifouling coating film formed from a curable polysiloxane composition comprising components (a), (b), (c), and (f) below,
• the urethane resin anticorrosive coating film (I) and the antifouling coating film (II) being laminated,
• (a) a diorganopolysiloxane having at least two functional groups in one molecule,
• (b) an organosilane having at least two hydroxyl groups or hydrolyzable groups in one molecule represented by formula (2) and/or a partial hydrolysis-condensate thereof:
• R8dSiY4-d (2)
• wherein
• R8 represents a hydrocarbon group having 1 to 6 carbon atoms selected from the group consisting of a straight-chain alkyl group, a branched alkyl group, a cyclic alkyl group, and a phenyl group;
• Y represents a hydroxyl group or a hydrolyzable group selected from the group consisting of a an iminoxy group, an acetyloxy group, an alkoxy group, an acyloxy group, an amino group, an amide group, and an aminoxy group;
• and
• d is an integer of 0 to 2,
• (c) an amino group-containing alkoxysilane represented by formula (1) and/or a reaction product thereof:
• X—R1—SiR2n(OR3)3-n (1)
• wherein
• R1 represents an alkylene group having 1 to 10 carbon atoms;
• R2 represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an aryl group having 6 to 12 carbon atoms;
• R3 represents an alkyl group having 1 to 10 carbon atoms;
• X is a group represented by R4R5N— or R6R7C═N—, wherein R4 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, an aryl group having 6 to 12 carbon atoms, or H2N(CH2)p(NH(CH2)q)r—, wherein p and q are integers of 2 to 5, and r is an integer of 0 to 5;
• R5 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an aryl group having 6 to 12 carbon atoms;
• and R6 and R7 each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an aryl group having 6 to 12 carbon atoms;
• and
• n is an integer of 0 to 2, and
• (f) a color pigment.