Impact-resistant, thermoplastic polyester molding materials

摘要

Impact-resistant thermoplastic polyester molding materials are prepared by thoroughly mixing A. from 52 to 99 parts by weight of a melt of one or more polyalkylene terephthalates with B. from 1 to 48 parts by weight of one or more elastomeric graft polymers prepared by emulsion polymerization and composed of 1. from 70 to 90% by weight of a grafting base consisting of elastomeric polymers having a gel content of not less than 80% and a glass transition temperature Tg of less than -20 DEG C. and 2. from 10 to 30% by weight of a grafted shell consisting of one or more polymers having a glass transition temperature Tg greater than 40 DEG C., in the form of an aqueous dispersion in which not less than 80% of the particles of graft polymer B have a size of from 0.05 to 0.15 mu m, with simultaneous removal of the water which vaporizes.