A basic copolymer whose main chain is cross-linked which comprises about 6 to about 98% by weight of recurring units of Formula (A) or (B), ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each represents a hydrogen atom or a hydrocarbon group selected from the group consisting of C.sub.1-20 alkyl groups, C.sub.3-10 cycloalkyl groups, C.sub.3-8 alkenyl groups, C.sub.6-15 aryl groups, C.sub.7-12 arylalkyl groups and C.sub.1-15 aminoalkyl groups; and X is an acid radical, and about 2 to about 94% by weight of cross-linked units based on the total weight of the recurring units of Formula (A) or (B) and the cross-linked units and, if desired, up to about 92% by weight of units of a monoethylenically unsaturated monomer or a conjugated monomer based on the total weight of the recurring units of Formula (A) or (B), the cross-linked units and the units of the monoethylenically unsaturated monomer or the conjugated monomer.
一种基础交联共聚物,其主链交联,包含约6至约98重量%的公式(A)或(B)的重复单元,其中R1、R2和R3,可以相同也可以不同,分别表示氢原子或从C1-20烷基,C3-10环烷基,C3-8烯基,C6-15芳基,C7-12芳基烷基和C1-15
氨基烷基中选择的烃基;X是酸基团,约2至约94重量%的交联单元基于公式(A)或(B)的重复单元和交联单元的总重量,并且如果需要,基于公式(A)或(B)的重复单元,交联单元和单
乙烯基不饱和单体或共轭单体的总重量,最多约92重量%的单体单位。