Process for the preparation of heat-stable polyurethane urea ela

Details Process for the preparation of heat-stable polyurethane urea ela Process for the preparation of heat-stable polyurethane urea ela

1990-11-30

1991-11-12

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521163, 528 64, 528 79, C08G 1814

Patent

active

050648756

ABSTRACT:
This invention relates to a process for preparing polyurethane urea elastomers by reacting (a) compounds containing at least two isocyanate-reactive groups and having a molecular weight in the range from about 400 to about 10,000; (b) polyisocyanates; and (c) aromatic diamines corresponding to the formula ##STR1## wherein R.sup.1 and R.sup.2 are independently hydrogen or alkyl.

REFERENCES:
patent: 3105062 (1963-09-01), Graham et al.
patent: 3891606 (1975-06-01), Kogon
patent: 3926922 (1975-12-01), Baron et al.
patent: 4663415 (1987-05-01), Grogler et al.
patent: 4808691 (1989-02-01), Konig et al.
patent: 4870206 (1989-09-01), Sanders et al.

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