| abstract |
The present invention relates to a process for producing a thermoplastic polyurethane, at least comprising the reaction of at least one isocyanate composition (ZI) containing an isocyanate (I1) selected from the group consisting of 1,5-naphthylene diisocyanate (NDI), 4,4'-diphenylmethane diisocyanate (MDI), p-phenyl diisocyanate (PPDI) and o-tolidine diisocyanate (TODI), ethylene diphenyl diisocyanate (EDI) or mixtures thereof and a polyol composition (ZP) comprising a polytetrahydrofuran or a derivative thereof to obtain a prepolymer having isocyanate groups, and reacting the resulting prepolymer with at least one chain extender (KV). The present invention also relates to a thermoplastic polyurethane obtained or obtainable according to said type of method and to an expanded granular material comprising such a thermoplastic polyurethane. The present invention further relates to the use of an expanded granular material according to the invention for producing a moulded body. |