Impact strength modifier for chlorine-containing resin, chlorine-containing resin composition and molded article thereof

摘要

A graft copolymer (A) obtained by graft polymerizing one or more vinyl monomers (b1) to a polyorganosiloxane rubber (A1) or a composite rubber (A2) containing a polyorganosiloxane rubber and a polyalkyl (meth) acrylate rubber ) Powder of an impact strength modifier, The specific surface area measured by the nitrogen gas adsorption method of the powder of the graft copolymer (A) is 0.6 to 30 m²/ G, (1) 5.0 g of the powder of the graft copolymer (A) was allowed to stand still for 15 minutes in an oven at 180 C., (2) after heating, it was dispersed in 100 ml of heated pure water (A) having a pH of 4 to 11 of water extracted under stirring at 70 C. for 1 hour with stirring is disclosed.