Molding materials of polyoxymethylene homopolymers and/or copolymers and thermoplastic polyurethane elastomers having improved heat stability, their preparation and their use

摘要

Molding materials ofPP(A) one or more polyoxymethylene homopolymers and/or copolymers andPP(B) one or more thermoplastic polyurethane elastomers,PP(C) with or without additives, contain, as an additive,PP(D) one or more alkaline earth metal silicates, advantageously in an amount of from 0.005 to 2% by weight, based on the weight of the components (A) and (B), for improving the heat stability, reducing the tendency to discoloration and minimizing the free formaldehyde content.P PTo prepare the molding materials, the components (A), (B), (D) and, if required (C) are advantageously melted together in an extruder at from 150 to 260 C.PPThe molding materials are useful for the production of films or moldings, which are used, for example, in the automotive, electrical appliances and electronics industries.