Thermoplastic polyurethanes, production and use thereof

Patent metadata

Field	Value
Publication number	US-10435501-B2
Application number	US-201515302847-A
Country	US
Kind code	B2
Filing date	Apr 1, 2015
Priority date	Apr 7, 2014
Publication date	Oct 8, 2019
Grant date	Oct 8, 2019

Abstract

The invention also relates to thermoplastic polyurethanes and to a method for the production and use thereof.

First claim

The invention claimed is:

1. A thermoplastic polyurethane obtainable from the reaction of the following components:
a) at least one organic diisocyanate,
b) compounds which are reactive towards isocyanates and which in each case have number-average molar masses of from 500 to 10 000 g/mol, where the number-average functionality of the entirety of the components under b) is from 1.8 to 2.5, and
c) chain extenders in each case having number-average molar masses of from 60 to 490 g/mol, where the number-average functionality of the entirety of the chain extenders under c) is from 1.8 to 2.5,
where component b) comprises at least one polyol based on paraformaldehyde (b1) as a polyoxymethylene block copolymer which is obtained via a catalytic addition reaction of at least one of ethylene oxide and propylene oxide onto at least one polymeric formaldehyde starter compound which has at least two terminal hydroxy groups, in the presence of a double metal cyanide catalyst, wherein the catalytic addition reaction includes an additional comonomer carbon dioxide, and wherein the polyoxymethylene block copolymer is based on 20% by weight paraformaldehyde, 66% by weight propylene oxide and 14% by weight of carbon dioxide, based on the weight of the polyoxymethylene block copolymer.

2. A process for the production of the thermoplastic polyurethanes according to claim 1 , wherein the process comprises:
reacting:
a) at least one organic diisocyanate with
b) compounds which are reactive towards isocyanates and which in each case have number-average molar masses of from 500 to 10 000 g/mol, where the number-average functionality of the entirety of the components under b) is from 1.8 to 2.5, and
c) chain extenders which have groups reactive towards isocyanates and which in each case have number-average molar masses of from 60 to 490 g/mol, where the number-average functionality of the entirety of the chain extenders under c) is from 1.8 to 2.5,
where component b) comprises at least one polyol based on paraformaldehyde (b1) as a polyoxymethylene block copolymer which is obtained via a catalytic addition reaction of at least one of ethylene oxide and propylene oxide onto at least one polymeric formaldehyde starter compound which has at least two terminal hydroxy groups, in the presence of a double metal cyanide catalyst.

3. A method comprising producing plastic parts utilizing the thermoplastic polyurethanes according to claim 1 .

4. The thermoplastic polyurethane of claim 1 , wherein the components are in the presence of catalysts.

5. The thermoplastic polyurethane of claim 1 , wherein the components are in the presence of monofunctional chain terminators.

6. The thermoplastic polyurethane of claim 1 , wherein the components are in the presence of auxiliaries and/or additional materials.

7. The thermoplastic polyurethane of claim 4 , wherein the components are in the presence of monofunctional chain terminators.

8. The thermoplastic polyurethane of claim 4 , wherein the components are in the presence of auxiliaries and/or additional materials.

9. The thermoplastic polyurethane of claim 7 , wherein the components are in the presence of auxiliaries and/or additional materials.

10. The process for the production of the thermoplastic polyurethanes according to claim 1 , wherein the reaction is in the presence of catalysts.

11. The process for the production of the thermoplastic polyurethanes according to claim 1 , wherein the reaction is in the presence of monofunctional chain terminators.

12. The process for the production of the thermoplastic polyurethanes according to claim 1 , wherein the reaction is in the presence of auxiliaries and/or additional materials.

13. The process for the production of the thermoplastic polyurethanes according to claim 10 , wherein the reaction is in the presence of monofunctional chain terminators.

14. The process for the production of the thermoplastic polyurethanes according to claim 10 , wherein the reaction is in the presence of auxiliaries and/or additional materials.

15. The process for the production of the thermoplastic polyurethanes according to claim 13 , wherein the reaction is in the presence of auxiliaries and/or additional materials.

Assignees

• Covestro Deutschland Ag

Inventors

• Wamprecht Christian
• Gürtler Christoph

Classifications

• C08G18/546 Primary

  Oxyalkylated polycondensates of aldehydes · CPC title

• C08G18/7671

  containing only one alkylene bisphenyl group · CPC title

• C08G18/48

  Polyethers · CPC title

• C08G18/0895 Primary

  Manufacture of polymers by continuous processes (C08G18/0838 takes precedence) · CPC title

• C08G18/4027

  Mixtures of compounds of group C08G18/54 with other macromolecular compounds · CPC title