A polymer, which contains a structural unit having a carboxyl group represented by the following formula (1) at a side chain of the structural unit, wherein no deposition is formed, when the polymer is dissolved in an alkali aqueous solution having a pH of 10 or more and kept at 25°C for 60 days:
wherein R1 represents a hydrogen atom or a methyl group; R2 represents an (n+1) -valent organic linking group containing an ester group represented by -O(C=O)-; A represents an oxygen atom or NR3-; R3 represents a hydrogen atom, or an monovalent hydrocarbon group having from 1 to 10 carbon atoms; andnindicates an integer of from 1 to 5.
一种聚合物,它含有一个结构单元,该结构单元的侧链上有一个下式(1)代表的羧基,当该聚合物溶解在 pH 值为 10 或以上的碱
水溶液中并在 25℃下保持 60 天时,不会形成沉积:
其中 R1 代表氢原子或甲基;R2 代表(n+1)价有机连接基团,含有由-O(C=O)-代表的酯基;A 代表氧原子或 NR3-;R3 代表氢原子或具有 1 至 10 个碳原子的一价烃基团;n 表示 1 至 5 的整数。