Regenerated, high molecular weight, thermoplastic resins and pro

Details Regenerated, high molecular weight, thermoplastic resins and pro Regenerated, high molecular weight, thermoplastic resins and pro

1990-12-04

1992-02-18

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525458, C08L 7504

Patent

active

050895710

ABSTRACT:
High molecular weight thermoplastic polyurethane resins with narrow molecular weight distribution and good physical properties are prepared by regenerating thermally degraded and/or off-grade thermoplastic polyurethane resins. The regenerated high molecular weight thermoplastic polyurethane resins do not present any processing difficulties inherent to high molecular weight resins.

REFERENCES:
patent: 2937151 (1960-05-01), Ten Broeck et al.
patent: 3738946 (1973-06-01), Frulla et al.
patent: 4129611 (1978-12-01), Heiss
patent: 4339358 (1982-07-01), Schutz
patent: 4822827 (1989-04-01), Bonk et al.

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