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US 10,329,374 B2Granted
Method for producing a thermoplastic copolymers from polycaprolactam and thermoplastic polyurethane
AssigneeBASF SE
InventorsPhilippe Desbois, Rajan Hollmann, Dirk Kempfert, Bernd Bruchmann, Frank Thielbeer, Rolf Muelhaupt
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Abstract
The present invention relates to a process for preparing a thermoplastic copolymer from polycaprolactam and thermoplastic polyurethane (TPU), to thermoplastic copolymers thus obtained and to shaped articles formed from copolymers of this type.
Claims20
A process for preparing a thermoplastic copolymer based on polycaprolactam and a thermoplastic polyurethane, the process comprising:
- preparing a liquid mixture comprising caprolactam and a thermoplastic polyurethane at a temperature T1;
- and
- admixing a polymerization catalyst to the liquid mixture to obtain a mixture comprising the caprolactam and the thermoplastic polyurethane in a mass ratio of caprolactam to thermoplastic polyurethane in the range from 3:1 to 1:4, and polymerizing at a temperature T2 of at most 175° C. to obtain the thermoplastic copolymer,
- wherein the thermoplastic polyurethane has a melting temperature T0 and is based on
- (i) an alkylene diisocyanate;
- (ii) an alkylenediol;
- and
- (iii) a polyalkylene ether.
5 more elements
A thermoplastic copolymer based on polycaprolactam and a thermoplastic polyurethane based on
- (i) an alkylene diisocyanate;
- (ii) an alkylenediol;
- and
- (iii) a polyalkylene ether,
- wherein the copolymer comprises the thermoplastic polyurethane in an amount of 25 to 80 wt %, based on the sum total of the weights of the caprolactam and of the thermoplastic polyurethane which are present in the copolymer.
2 more elements
Dependencies are inferred from the claim text.