CPC C08G 18/10 (2013.01) [C08G 18/3206 (2013.01); C08G 18/4825 (2013.01); C08G 18/4845 (2013.01)] | 20 Claims |
1. A thermoplastic polyurethane having a glass transition temperature of a soft phase of not more than −25° C. measured using DMA and a heating rate of 2K/min at 1 Hz under torsion based on DIN EN ISO 6721: 2016; maximum G″ obtained by a process at least comprising steps (i) and (ii):
(i) reacting a first polyol composition comprising at least one polyol based on polypropylene glycol, wherein a proportion of secondary terminal OH groups based on a total number of terminal OH groups of the polypropylene glycol is in a range of >90% and the polypropylene glycol has a number-average molecular weight Mn in a range from 650 g/mol to 4000 g/mol, with a first polyisocyanate to obtain a second polyol composition comprising a prepolymer,
(ii) reacting the second polyol composition comprising the prepolymer with a polyisocyanate composition comprising at least one second polyisocyanate and at least one chain extender having a molecular weight <500 g/mol, wherein the reaction according to step (i) is carried out continuously.
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