Polyurethane compositions derived from polyols containing a cont

Details Polyurethane compositions derived from polyols containing a cont Polyurethane compositions derived from polyols containing a cont

1979-06-14

1981-02-03

Welsh, Maurice J.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 65, 528 66, 528 73, 528 77, 528 78, 528 80, 528 81, 528 83, 528 84, C08G 1832

Patent

active

042489946

ABSTRACT:
Polyols containing at least one carboxamide group, --[NHC.dbd.O]--, in the polyol backbone impart to polyurethane resin-forming systems a unique combination of normal pot life and accelerated curing characteristics without sacrifice of final physical properties. Methods are given for preparation of such polyols which enable incorporation of a small, predetermined number of such carboxamide groups, not exceeding in number the hydroxyl functionality of the polyol, into each and every individual polyol molecule. The rapid-curing/property-development characteristics of derived polyurethane resin-forming systems are especially valuable in molding operations, where both mold cycle times and curing energy requirements are substantially reduced in comparison with conventional polyurethane resin-forming systems having similar final physical properties.

REFERENCES:
patent: 2933477 (1960-04-01), Hostettler
patent: 2933478 (1960-04-01), Young et al.
patent: 2990379 (1961-06-01), Young et al.
patent: 3186971 (1965-06-01), Hostettler et al.
patent: 3833641 (1974-09-01), Papa et al.

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