Process for preparing low smoke-generating rigid foams

Details Process for preparing low smoke-generating rigid foams Process for preparing low smoke-generating rigid foams

1974-04-24

1976-06-22

Ivy, C. Warren

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25AK, 260 25AP, C08G 1848

Patent

active

039650529

ABSTRACT:
A process for preparing low smoke-generating rigid foams with a polyisocyanate, a polyol, a blowing agent, and a catalyst and surfactant, which comprises using an aromatic polyisocyanate as a polyisocyanate in the range between 3 to 5 times to the total amount of the compounds having active hydrogen in chemical equivalent, a polyol having a hydroxyl value less than 200 and containing more than 10% of primary hydroxyl groups, and water as a blowing agent in the amount of 2 to 6 parts by weight against 100 parts of above polyol together with catalysts suitable for isocyanate trimerization as the main catalyst.

REFERENCES:
patent: 3715337 (1973-02-01), Allen
patent: 3803064 (1974-04-01), Fishbein

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