A resin modification composition for a thermoplastic resin containing a rubber-containing graft polymer composition, a rubber-containing graft polymer-containing resin composition and a molded product thereof.

摘要

Provided is a rubber-containing graft polymer capable of reducing wet heat aging of a molded product while improving the strength development of a thermoplastic resin. The rubber-containing graft polymer of the present invention has a content ratio of a component having a weight average molecular weight of 800,000 or more in an organic solvent-soluble content (100% by mass) of the rubber-containing graft polymer of 1% by mass or more, and the rubber. The phosphorus content in the contained graft polymer is 3 to 30 mmol / kg.