Polyarylene sulfide resin compositions

Abstract

A polyarylene sulfide resin composition obtained by melt-mixing a mixture comprising resin components comprising as main resins (A) a polyarylene sulfide resin and (B) a polyorganopsiloxane graft copolymer obtained by graft-polymerizing one or more kinds of vinyl monomer containing at least an epoxy group-containing vinyl monomer onto a compound rubber in which a polyorganosiloxane rubber and a polyalkyl (meth)acrylate rubber have been inseparably united with each other. The composition of the present invention, whether it contains a filler or not, is excellent in compatibility between the polyarylene sulfide resin and polyorganosiloxane graft copolymer. If this composition is extrusion-molded or injection-molded under the common molding conditions, it keeps its original dispersed and mixed condition without showing a phase separation. Consequently, this composition has an excellent performance that impact resistance also has been given to the polyarylene sulfide resin without largely injuring excellent properties inherent to the resin. Particularly, this composition is very little deteriorated in impact strength when it is put in wet heat conditions under pressure, and therefore it is usable in such conditions.

Dependencies are inferred from the claim text.