Patent ID: 8530600

Claim:
A thermoplastic polyurethane, obtained from components comprising a) at least one organic diisocyanate, b) at least one low molecular polyol having an average of from 1.8 to 3 Zerewitinoff-active hydrogen atoms and having a number average molecular weight M n of from 60 to 400 g/mol, and c) at least one further polyol having an average of from 1.8 to 3 Zerewitinoff-active hydrogen atoms and having a number average molecular weight M n of from 450 to 10,000 g/mol, e) optionally a catalyst, f) optionally additives and/or auxiliary materials, and/or g) optionally chain breakers, wherein the ratio of isocyanate groups in component a) to isocyanate reactive groups, in components b), c) and, if present, g) is from 0.9:1 to 1.1:1, and wherein the thermoplastic polyurethane comprises d) from 0.4 to 10% by weight, based on the thermoplastic polyurethane, of a mixture which comprises d1) from 0.1 to 4% by weight, based on the thermoplastic polyurethane, of at least one amorphous and/or crystalline silicon dioxide, and a polyorganosiloxane mixture of the formula (R 2 SiO) n , wherein R 2 represents an organic hydrocarbon residue which may be made linear and/or branched, and has 1 to 27 carbon atoms, and n represents an integer from 3 to 8,000, wherein the polyorganosiloxane mixture consists of d2) 0 to 2% by weight, based on the thermoplastic polyurethane, of at least one polyorganosiloxanes of the formula (R 2 SiO) n , wherein n is from 3 to 300 and d3) 0.2 to 8% by weight, based on the thermoplastic polyurethane, of at least one polyorganosiloxanes of the formula (R 2 SiO) n wherein n is from 1,000 to 8,000.