Laminated antifouling coating film, base material with laminated antifouling coating film, its manufacturing method, coating kit for forming laminated antifouling coating film, upper antifouling coating composition, and antifouling method

摘要

A multilayer antifouling coating film formed by laminating a lower antifouling coating film (X) and an upper antifouling coating film (Y), wherein the lower antifouling coating film (X) contains a hydrolyzable polymer (A1) and an organic antifouling agent (B1). The coating film (Y) contains a hydrolyzable polymer (A2), and the organic antifouling agent (B1) is 4-bromo-2- (4-chlorophenyl) -5- (trifluoromethyl) -1H-pyrrole. A laminated antifouling coating film, which is at least one selected from 3-carbonitrile and 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one.