Production and Use of New Thermoplastic Polyurethane Elastomers Based on Polyethercarbonate Polyols

The invention relates to a process for producing a thermoplastic polyurethane elastomer comprising the reaction of at least A) an organic diisocyanate containing two isocyanate groups with B) a polyol having a number average molecular weight M n of ≥ 500 and ≦ 5000 g / mol, the at least two isocyanate and C) one or more chain extenders with a molecular weight of ≥ 60 and ≤ 490 g / mol, which have two isocyanate-reactive groups and optionally D) a monofunctional chain terminator having an isocyanate-reactive group and / or E ) a catalyst, wherein the molar ratio of the isocyanate groups from A) to the sum of the isocyanate-reactive groups in B), C) and optionally D) ≥ 0.9: 1 and ≤ 1.2: 1, and the component B) contains at least one polyether carbonate polyol which is obtained by addition of carbon dioxide and alkylene oxides to H-functional starter substances ch is. Further objects of the invention are a thermoplastic polyurethane elastomer produced by the process according to the invention, its use for the production of extruded or injection-molded articles, as well as the articles produced by extrusion or injection molding.