Highly flame resistant rigid urethane-isocyanurate foam composit

Details Highly flame resistant rigid urethane-isocyanurate foam composit Highly flame resistant rigid urethane-isocyanurate foam composit

1984-01-04

1985-06-04

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521168, 521169, C08G 1814

Patent

active

045215472

ABSTRACT:
Highly flame resistant rigid urethane-isocyanurate foams which meet the German B-1 rating are prepared from compositions containing blowing agent, polyester polyol derived from the residue of dimethyl terephthalate or terephthalic acid production, a phosphorus containing polyol and an isocyanurate catalyst, in which the NCO:OH ratio is 3 to 6.

REFERENCES:
patent: 3525705 (1970-08-01), Harowitz
patent: 3647759 (1972-03-01), Walker
patent: 4051082 (1977-09-01), Cenker et al.
patent: 4237238 (1980-12-01), DeGuiseppi et al.
patent: 4390644 (1983-06-01), Clarke et al.

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