Method for preparing urethane-modified isocyanurate foams

Details Method for preparing urethane-modified isocyanurate foams Method for preparing urethane-modified isocyanurate foams

1978-10-25

1979-11-06

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521126, C08J 900

Patent

active

041736923

ABSTRACT:
The friability exhibited by urethane-modified isocyanurate foams prepared by reacting a polyfunctional isocyanate with a polyol at a ratio of isocyanate equivalents to moles of active hydrogen greater than 6:1 is reduced to an acceptable level using alkali metal salts in combination with certain organotin compounds or stannous salts as the catalyst.

REFERENCES:
patent: 3342757 (1967-09-01), Considine
patent: 3940517 (1976-02-01), DeLeon

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