The present invention provides a copolymer for an antifouling coating composition which can realize an excellent antifouling performance for a long time even in a bay where adhesion of fouling organisms is extremely severe and which can form an antifouling coating film with excellent seawater resistance. According to the present invention, an antifouling coating composition, comprising: a copolymer P; and an antifouling agent; wherein: the copolymer P is a copolymer of a monomer (a), a monomer (b), a monomer (c), and an ethylenically unsaturated monomer (d) other than the monomers (a) to (c); the monomer (a) is represented by general formula (1);
in the general formula (1), R1 is a methyl group, R2, R3, and R4 are the same or different, and each represents a C3-C8 branched alkyl group or a phenyl group; content of the monomer (a) is 25 to 50mass% with respect to a total mass of the monomers (a) to (d); each of the monomer (b) and (c) is a monomer having a common logarithm log P of n-octanol/water partition coefficient P of 0.00 to 0.59 and 0.60 to 0.95; the monomer (c) is a monomer having only one unsaturated bond is provided.
本发明提供了一种用于防污涂层组合物的共聚物,该组合物即使在污损
生物附着极为严重的海湾中也能长期实现优异的防污性能,并能形成具有优异耐海
水性的防污涂膜。根据本发明,一种防污涂层组合物,包括:共聚物 P;和防污剂;其中:共聚物 P 是单体 (a)、单体 (b)、单体 (c) 和除单体 (a) 至 (c) 之外的
乙烯基不饱和单体 (d) 的共聚物;单体 (a) 由通式 (1) 表示;
在通式(1)中,R1为甲基,R2、R3和R4相同或不同,且各自代表C3-C8支链烷基或苯基;相对于单体(a)至(d)的总质量,单体(a)的含量为25至50质量%;单体(b)和(c)中的每一种单体的正
辛醇/
水分配系数P的共同对数log P为0.00至0.59和0.60至0.95;单体(c)是仅具有一个不饱和键的单体。