Extrusion process for the preparation of polyurethane ureas

Details Extrusion process for the preparation of polyurethane ureas Extrusion process for the preparation of polyurethane ureas

1980-06-20

1981-08-25

Cockeram, H. S.

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

Synthetic resins

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

264176R, 528 44, 528 49, 528 69, 528 75, C08G 1808, C08G 1863

Patent

active

042860806

ABSTRACT:
The present invention relates to a process for the preparation of polyurethane ureas from relatively high molecular weight polyols, diisocyanates, water as chain lengthening agent and optionally short chain glycols in a multishaft extruder equipped with kneading elements.

REFERENCES:
patent: 3963679 (1976-06-01), Ullrich et al.
patent: 4049632 (1977-09-01), Magnusson et al.
patent: 4051212 (1977-09-01), Grigat et al.
patent: 4055549 (1977-10-01), Roberts
Condensed Chemical Dictionary, 9th Edition, Van Nostrand, N-4, (1977) p. 924.

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