Carboxylic acid modified carbon dioxide co-blown polyurethane-po

Details Carboxylic acid modified carbon dioxide co-blown polyurethane-po Carboxylic acid modified carbon dioxide co-blown polyurethane-po

1990-11-13

1992-09-01

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

C08G 1814

Patent

active

051439450

ABSTRACT:
Disclosed are rigid polyurethane-polyisocyanurate foams prepared from polyisocyanates, polyols, trimer catalysts and a blowing agent mixture comprising (i) a halocarbon, and (ii) an organic carboxylic acid, and, optionally water.
The foams have excellent aged K-factor values at fluorocarbon levels reduced by up to 75 percent over prior art materials.

REFERENCES:
patent: 4417002 (1983-11-01), Liessem
patent: 4758605 (1988-07-01), Williams

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