Urethane oligomers and polyurethanes

Details Urethane oligomers and polyurethanes Urethane oligomers and polyurethanes

1992-04-17

1992-12-29

Welsh, Maurice J.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528111, 528121, 528370, 560 25, 560 26, 560115, 560158, C08G 5940

Patent

active

051752310

ABSTRACT:
A urethane is formed in a new way, without requiring the use of isocyanates. The urethane is formed by reacting a compound containing a plurality of cyclocarbonate groups with a diamine in which the two amine groups have different reactivities with cyclocarbonate, so as to form a urethane oligomer with amine end groups. The urethane oligomer can then be reacted in several different ways to form polyurethane.

REFERENCES:
patent: 2802022 (1957-08-01), Groszos et al.
patent: 2928812 (1960-03-01), Ernst
patent: 3277098 (1966-10-01), Merten et al.
patent: 3929731 (1975-12-01), Volkova et al.

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