Process for making poly(alkyl(meth)acrylate) rubber later and graft copolymer thereof

聚(甲基)丙烯酸烷基酯胶乳的制造方法，该方法包括于水介质中在根据式R-SO#-[3]M的表面活性剂的存在下以连续乳液聚合方法聚合(甲基)丙烯酸烷基酯单体，其中R为烷基或烷氧基，M为提供改善橡胶粒度控制的氢或阳离子。当基于由本方法制造的聚(甲基)丙烯酸烷基酯橡胶的接枝共聚物用作热塑性树脂模塑组合物中的抗冲击改性剂时，其提供了改善的耐候性。 A process for making a poly(alkyl (meth)acrylate) rubber latex includes polymerizing, in a continuous emulsion polymerization process, an alkyl (meth)acrylate monomer in an aqueous medium in the presence of a surfactant according to the formula R-S03M, wherein R is alkyl or alkoxyl and M is H or a cation provides improved control of rubber particle size. A graft copolymer based on the poly(alkyl(meth)acrylate) rubber made by the process provides improved weatherability when used as an impact modifier in thermoplastic resin molding compositions.