| abstract |
The invention relates to an expanded thermoplastic polyurethane formed from isocyanate, isocyanate-reactive compounds with a molar mass of 500-10000 g/mol and a chain extender, wherein conventional additives may also be present, and the hard phase content of the thermoplastic polyurethane is 0.1 -0.95, the hard phase content is defined as follows: hard phase content = formula (I), Wherein-M KVx : molar mass of chain extender x, in g/mol,-m KVx : mass of chain extender x, in g,-M Ixo : molar mass of isocyanate used, in g/mol , ‑m ges : total mass of all starting materials excluding additives, ‑k : number of chain extenders, which are diols with 5 to 10 carbon atoms; a mixture of at least two diols, wherein at least one diol having 4-10 carbon atoms, all other diols having 2-10 carbon atoms; a mixture of at least one diol having 4-10 carbon atoms and at least one diamine; or at least one Mixtures of diols and amino alcohols having 4-10 carbon atoms. The invention also relates to a process for producing expanded thermoplastic polyurethane and a process for producing moldings therefrom. |