Cellular isocyanurate polymer

Details Cellular isocyanurate polymer Cellular isocyanurate polymer

1976-01-19

1977-08-02

Ivy, C. Warren

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25AN, C08G 1842

Patent

active

040394875

ABSTRACT:
Polyisocyanurate foams are disclosed which are characterized by low Flame Spread Ratings and low smoke generation values, as determined by the Underwriter's Laboratory Tunnel Test in accordance with the ASTM E-84 test procedure. The smoke and flame resistant properties are achieved, not through the use of flame retardants or additives, but rather by the use of a minor amount of a hydroxyl terminated aromatic polyester having a hydroxyl equivalent weight from about 150 to about 500 and which is the product of the reaction of an excess of a polyethyleneglycol having an equivalent weight from about 75 to about 225, with an aromatic polycarboxylic compound.

REFERENCES:
patent: 3072614 (1963-01-01), Bolton
patent: 3431223 (1969-03-01), Reymore
patent: 3502601 (1970-03-01), Case
patent: 3572417 (1971-03-01), Wismer
patent: 3620986 (1971-11-01), Diehr
patent: 3642646 (1972-02-01), Marcus
patent: 3745133 (1973-07-01), Comunale
patent: 3755212 (1973-08-01), Dunlap
patent: 3909465 (1975-09-01), Wiedermann

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