Low friability polyisocyanurate foams

Details Low friability polyisocyanurate foams Low friability polyisocyanurate foams

1976-07-30

1977-09-06

Ivy, C. Warren

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25AP, C08G 1848, C08G 1814

Patent

active

040467210

ABSTRACT:
Covers novel urethane-modified polyisocyanurate rigid foams comprising a reaction product obtained by bringing together in the presence of a blowing agent, an aromatic polyisocyanate, an isocyanurate group formation catalyst and a polyol comprising an alkylene oxide adduct of a novolak resin containing 5-25 weight percent of free phenol or substituted phenol based on the weight of said resin. Said foams are particularly characterized by their low friability, good flammability resistance and excellent thermal stability.
The novel foams are useful in preparing rigid foam materials, such as, panels, slabs or sprayed foam surfaces.

REFERENCES:
patent: 2938884 (1960-05-01), Chern
patent: 3207710 (1965-09-01), Davis
patent: 3242107 (1966-03-01), Bunge
patent: 3250745 (1966-05-01), Davis
patent: 3497465 (1970-02-01), Kujawa
patent: 3538040 (1970-11-01), Grazen
patent: 3682845 (1972-08-01), Longley
patent: 3686101 (1972-08-01), Davis
patent: 3723367 (1973-03-01), Chow
patent: 3728293 (1973-04-01), Booth
patent: 3770671 (1973-11-01), McFarling
patent: 3842036 (1974-10-01), Chow

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