An antifouling coating composition having an excellent coating film strength and also has markedly superior antifouling properties, and a novel resin which is useful as a matrix resin for the composition are provided. The antifouling coating composition comprises a vinyl polymer (A) having, as a repeating unit, a structural unit (a) represented by the following formula (1):
1
(in the formula (1), X
1
and X
2
each independently represents an ester bond or a carbonyl group; R
1
represents an ethylene structure which forms a covalent bond with the carbonyl carbon atom and X
1
in the formula (1) at the same or adjacent carbon atom; R
2
represents a gem-alkylene group, a vic-alkylene group, an arylmethylidene group or an arylethylene group; and R
3
and R
4
represent an alkyl group or an aryl group, or a hydrocarbon group having a carbonyl group, an ether bond or an ester bond) and an antifouling agent (B).
本发明提供了一种涂膜强度极佳且防污性能明显优越的防污涂料组合物,以及一种可用作该组合物基体
树脂的新型
树脂。这种防污涂料组合物包括
乙烯基聚合物(A),其
重复单元是由下式(1)表示的结构单元(a):
1
式(1)中,X
1
和 X
2
各自独立地代表
酯键或羰基;R
1
代表与羰基
碳原子形成共价键的
乙烯结构,X
1
在相同或相邻
碳原子上形成共价键的
乙烯结构;R
2
代表环亚
甲基基团、沧亚
甲基基团、芳基亚
甲基基团或芳基亚乙基基团;以及 R
3
和 R
4
代表烷基或芳基,或具有羰基、醚键或
酯键的烃基)和防污剂 (B)。