Claims
- 1. A process for the production of plastics containing thermoplastic polyurethanes comprising
- a) introducing a thermoplastic polyurethane having an isocyanate index below 1 and any optional polymers which are compatible with the thermoplastic polyurethane or reinforcing materials into a twin-screw extruder,
- b) melting and homogenizing the thermoplastic polyurethane in the twin-screw extruder, and
- c) adding an isocyanate to the melted thermoplastic polyurethane in an amount such that the isocyanate index of the melt is increased to an index of from 1.00 to 1.05.
- 2. The process of claim 1 in which the isocyanate added in c) is hexamethylene diisocyanate and/or 4,4'-diisocyanatodiphenyl methane.
- 3. A process for the production of exterior bodywork parts comprising molding the plastic containing thermoplastic polyurethane produced by the process of claim 1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
39 20 838.3 |
Sep 1989 |
DEX |
|
Parent Case Info
This application is a continuation of application Ser. No. 07/580,691 filed Sep. 11, 1990 now abandoned.
US Referenced Citations (6)
Foreign Referenced Citations (1)
Number |
Date |
Country |
3179987 |
Jul 1988 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
580691 |
Sep 1990 |
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