Thermoplastic polyether polyurethane elastomers

Details Thermoplastic polyether polyurethane elastomers Thermoplastic polyether polyurethane elastomers

1977-09-29

1980-02-26

Cockeram, H. S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264328, 264329, 521159, 521914, 528 66, 560 26, C08G 1848, C07C12504, C08G 1814

Patent

active

041907116

ABSTRACT:
Thermoplastic polyether polyurethane elastomers are provided by reacting and forming: (a) a novel liquid polyurethane quasi-prepolymer having a free NCO content of from about 16 percent to about 25 percent; (b) a reactive poly(oxypropylene-oxyethylene) diol; and (c) as an extender, a short chain diol in the presence of (d) a catalyst. The elastomers can be either solid or microcellular, and they are suitable for production using Reaction Injection Molding (RIM) or conventional casting technology. The elastomers are useful in the production of automotive body panels, gears, seals and the like, and, since the elastomers are thermoplastic, any excess elastomer ("scrap") can be reused.

REFERENCES:
patent: 3575896 (1971-04-01), Khan
patent: 3821130 (1974-06-01), Barron et al.
patent: 3823201 (1974-07-01), Pizzini et al.
patent: 3905925 (1975-09-01), Vervloet
patent: 4048105 (1977-09-01), Salisbury
patent: 4049636 (1977-09-01), Mao et al.

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