Catalyst for making polyurethanes

Details Catalyst for making polyurethanes Catalyst for making polyurethanes

1978-08-21

1980-02-19

Cockeram, H. S.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

260 458N, 528 53, C08G 1820, G08G 1814

Patent

active

041895436

ABSTRACT:
Compounds of formulas I and II are heat-activated catalysts used in making polyurethanes. ##STR1## wherein R, R.sub.1, and R.sub.2 are each independently H, hydrocarbyl or an inertly-substituted hydrocarbyl; R.sub.3 and R.sub.4 are each independently hydrocarbyl or an inertly-substituted hydrocarbyl; and X is an anion. Upon heating, Compounds I and II catalyze the reaction and may release gaseous by-products which cause the resulting polyurethane compound to foam. For example, the catalyst, t-butyl imidazole-N-carboxylate, when heated to 120.degree. C., catalyzes the reaction between a polyol and a polyisocyanate to give a foamed polyurethane which cured in 16 minutes.

REFERENCES:
patent: 3152094 (1964-10-01), Erner et al.
patent: 3177223 (1965-04-01), Erner
patent: 3912689 (1975-10-01), Bechara et al.
patent: 4025466 (1977-05-01), Jourquin et al.
patent: 4041019 (1977-08-01), McGraw et al.
patent: 4067831 (1978-01-01), Wasilczyk
patent: 4102857 (1978-07-01), Avar et al.

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