Catalyst for polyisocyanurate foams made with alternative blowin

Details Catalyst for polyisocyanurate foams made with alternative blowin Catalyst for polyisocyanurate foams made with alternative blowin

1995-07-10

1996-10-08

Seidleck, James J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521129, 521130, 521131, 521137, 521172, 521173, 521902, C08J 908

Patent

active

055631800

ABSTRACT:
Rigid, closed cell polyisocyanurate foams are prepared by reacting together a polyisocyanate and a polyester polyol or a mixture of a polyester polyol and at least one other isocyanate-reactive compound in the presence of (a) a hydrogen-containing blowing agent or a mixture of a hydrogen-containing blowing agent and at least one co-blowing agent and (b) a catalyst mixture comprising (i) a carboxylate salt of an alkali metal or an alkaline earth metal or mixtures thereof, (ii) a quaternary ammonium carboxylate salt, and (iii) optionally a tertiary amine, wherein the mole ratio of carboxylate metal salt: tertiary amine is a value greater than about 2:1, and the total moles of quaternary ammonium carboxylate salt are less than the combined moles of the carboxylate metal salt and the tertiary amine.

REFERENCES:
patent: 3954684 (1976-05-01), Farrissey, Jr. et al.
patent: 4204019 (1980-05-01), Parker
patent: 4997706 (1991-05-01), Smits et al.

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