THERMOPLASTIC COMPOSITIONS OF POLYURETHANES AND RUBBER GRAFT POLYMERS

摘要

The instant invention is directed to a thermoplastic synthetic material, comprising: (A) 75 to 97% by weight of a thermoplastic polyurethane and (B) 25 to 3% by weight of a polymer of olefinically unsaturated monomers, wherein component (B) is a graft product of (a) 5 to 35% by weight, based on the graft product, of one or more graft monomers on (b) 65 to 95% by weight, based on the graft product, of an elastomer component serving as graft base which has a second order transition temperature of below -30 DEG C., the entire component (B) containing less than 50% by weight of the monomers styrene, alpha -methyl styrene and acrylonitrile. The instant invention is also directed to a process for the production of the thermoplastic synthetic materials.