Thermoplastic polyurethanes
AssigneeBASF SE
InventorsNorbert Pohlmann, Andreas Przybilski, Rolf Steinberger
Life of this patent
Estimating the term…
Abstract
Thermoplastic polyurethanes are obtainable by reacting (a) isocyanates with (b1) polyesterdiols having a melting point greater than 150° C., (b2) polyetherdiols and/or polyesterdiols, each having a melting point of less than 150° C. and a molecular weight of from 501 to 8 000 g/mol, and, if required, (c) diols having a molecular weight of from 62 to 500 g/mol.
Claims19
A thermoplastic polyurethane obtainable by reacting (a) isocyanates with (b1) polyesterdiols having a melting point greater than 150° C., (b2) polyetherdiols and/or polyester diols, each having a melting point of less than 150° C. and a molecular weight of from 501 to 8 000 g/mol, and, if required, (c) diols having a molecular weight of from 62 to 500 g/mol.
A process for the preparation of thermoplastic polyurethanes, wherein
- (i) a thermoplastic polyester is reacted with a diol (c) and then
- (ii) the reaction product of (i) containing (b1) polyesterdiol having a melting point greater than 150° C. and, if required, (c) diol together with (b2) polyetherdiols and/or polyesterdiols, each having a melting point of less than 150° C. and a molecular weight of from 501 to 8 000 g/mol and, if required, further (c) diols having a molecular weight of from 62 to 500 g/mol are reacted with (a) isocyanate, in the presence or absence of (d) catalysts and/or (e) assistants.
Dependencies are inferred from the claim text.