Process for preparing smoke-retardant polyisocyanurate foam

Details Process for preparing smoke-retardant polyisocyanurate foam Process for preparing smoke-retardant polyisocyanurate foam

1976-03-03

1978-02-07

Rzucidlo, Eugene C.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25AH, 260 25AJ, 260 25AK, C08G 1814

Patent

active

040726363

ABSTRACT:
In a process for preparing a smoke-retardant polyisocyanurate foam by reacting an organic polyisocyanate in the presence of a blowing agent and an isocyanate-trimerization catalyst, an improvement is characterized in that the reaction is conducted in the presence of an organosilicate having the formula Si(OR).sub.4 or R.sub.n Si(OR').sub.4-n wherein R and R' are the same or different and represent aliphatic, alicyclic and aromatic hydrocarbon groups having 1-12 carbon atoms or substituted derivatives thereof and n is an integer of 1 to 3.

REFERENCES:
patent: 3050477 (1962-08-01), Gmitter et al.
patent: 3718612 (1973-02-01), Strickman
patent: 3900506 (1975-08-01), Bell et al.
patent: 3935133 (1976-01-01), VAN Leurven et al.

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