Modified carboxyl-containing polyphenylene ether resins

摘要

A process for the preparation of modified polyphenylene ether resins by grafting fumaric acid, preferably at from 270 DEG to 350 DEG C., onto polyphenylene ethers which are mixed with vinylaromatic polymers, and modified polyphenylene ether resins consisting of from 4.95 to 95 parts by weight of polyphenylene ether, from 95 to 4.95 parts by weight of vinylaromatic polymer and from 0.05 to 10 parts by weight of grafted fumaric acid.