Having excellent impact resistance, weather resistance, and coloring properties asa graft copolymers, and their preparation

The present invention relates to a core - (ASA) graft copolymer and its preparation acrylonitrile styrene acrylate shell structure wherein the core is a multicore ASA graft copolymer rubber copolymer, wherein sequentially polymerized alkyl acrylate mono body, and the shell is formed by polymerization of styrene monomer and acrylonitrile monomer with the core. ASA graft copolymer resin prepared by the steps of: polynuclear rubber polymer latex prepared sequentially polymerized alkyl acrylate monomers; and by graft polymerization of styrene monomer and acrylonitrile monomer with a rubber polymers multicore forming a shell. It has excellent impact resistance, weather resistance, coloring properties and ASA resin according to the present invention.