A copolymer of an olefin and maleic anhydride is produced in the form of particles by co-polymerizing an olefin having 2 to 8 carbon atoms with maleic anhydride in a solvent capable of dissolving both co-monomers, but incapable of dissolving the copolymer in the presence of a dispersant of an oil-soluble, cationic copolymer comprising (a) ethylenically unsaturated monomer units having cationic groups of a quaternary ammonium salt and (b) lipophilic, ethylenically unsaturated monomer units. It has a relatively uniform particle size distribution.
一种烯烃和
马来酸酐的共聚物是通过在能溶解两种共聚单体的溶剂中使具有 2 至 8 个碳原子的烯烃和
马来酸酐共聚而制成颗粒状的、但在有一种油溶性阳离子共聚物的分散剂存在时,不能溶解该共聚物,该共聚物由(a) 具有季
铵盐阳离子基团的
乙烯不饱和单体单元和(b) 亲脂性
乙烯不饱和单体单元组成。它的粒径分布相对均匀。