Crosslinked addition polymer microparticles are produced by dispersion polymerisation of ethylenically unsaturated monomers in aliphatic hydrocarbon liquid, in the presence of a specified dispersion stabiliser, at least one of the monomers containing a hydroxymethylamino or alkoxymethylamino group and at least one other of the monomers containing a functional group, such as a hydroxyl or carboxyl group, which is capable of reacting with the aforesaid group under the polymerisation conditions. The microparticies may be incorporated into coating compositions, preferably in association with an auxiliary polymer which is soluble in the liquid diluent of the composition and is compatible with the film-forming polymer thereof, with resulting improvement in the application characteristics of the composition.
交联加成聚合物微粒是在指定的分散稳定剂存在下,通过
乙烯不饱和单体在脂族烃液体中的分散聚合制得的,其中至少一种单体含有羟甲基
氨基或烷氧基甲基
氨基,至少另一种单体含有官能团,如羟基或羧基,在聚合条件下能与上述官能团反应。微粒子可与辅助聚合物一起加入涂料组合物中,辅助聚合物可溶于组合物的液体稀释剂中,并与成膜聚合物相容,从而改善组合物的应用特性。