Production of graft copolymer rubber for use in resin compositions

摘要

A process for the production of a graft copolymer rubber (A), comprising the graft polymerisation of an alkenyl-aromatic compound (I) on an ethylene/ alpha -olefin/dicyclopentadiene (EPDM) terpolymer rubber (II) with a Q value (ratio of Mw/Mn) of more than 5.0 and a Mooney viscosity (at 100 deg C) of 70 or less, in aqueous suspension in the presence of a radical initiator and dispersant. Also claimed is a polypropylene (PP)-based resin material (PP-RM) containing rubber (A) and a PP-based resin (B).