First embodiment of a (meth)acrylic copolymer in the present invention includes following: a (meth)acrylic copolymer having at least one kind of constitutional unit selected from the group consisting of a constitutional unit (A1) having at least one kind of structure (I) selected from the group consisting of structures represented by the following formula (1), formula (2), or formula (3) and a constitutional unit (A2) having a triorganosilyloxycarbonyl group and a constitutional unit (B) derived from a macromonomer (b):
(where, X represents -O-, -S-, or -NR14-, R14 represents a hydrogen atom or an alkyl group, R1 and R2 each represent a hydrogen atom or an alkyl group having from 1 to 10 carbon atoms, R3 and R5 each represent an alkyl group having from 1 to 20 carbon atoms, a cycloalkyl group, or an aryl group, and R4 and R6 each represent an alkylene group having from 1 to 10 carbon atoms).
本发明中(甲基)
丙烯酸共聚物的第一种实施方式包括:一种(甲基)
丙烯酸共聚物,其至少具有一种结构单元,该结构单元选自具有至少一种结构(I)的结构单元(A1),该结构单元选自由式(1)、式(2)或式(3)代表的结构组成的组,以及具有三有机
硅氧基羰基的结构单元(A2)和由大单体(b)衍生的结构单元(B):
(其中,X 代表-O-、-S-或-NR14-,R14 代表氢原子或烷基,R1 和 R2 分别代表氢原子或具有 1 至 10 个碳原子的烷基,R3 和 R5 分别代表具有 1 至 20 个碳原子的烷基、环烷基或芳基,R4 和 R6 分别代表具有 1 至 10 个碳原子的亚烷基)。