Process for the production of polyurethane foams

Details Process for the production of polyurethane foams Process for the production of polyurethane foams

1989-04-07

1991-06-11

Kight, III, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 99, 521119, 521120, 521123, 521128, C08J 914, C08K 902

Patent

active

050232800

ABSTRACT:
The present invention relates to a process for the production of polyurethane foams by the reaction of 1) polyisocyanates with 2) polyesters, polycarbonates, polylactones, or polyamides having a molecular weight range of about 400 to about 10,000 and containing at least two isocyanate reactive hydrogen atoms, or mixtures thereof, in the presence of 3) water and/or organic blowing agents, 4) catalysts and 5) flame-retardants, and optionally in the presence of 6) compounds with molecular weights of from 32 to 399 containing at least two isocyanate reactive hydrogen atoms and 7) surface-active additives and other auxiliary agents known in the art. The flame-retardants consist of graphite which has been modified with inorganic expandable materials, either alone or in combination with an inorganic co-flame-retardant.

REFERENCES:
patent: 3574644 (1971-04-01), Olstowski et al.
patent: 4529742 (1985-07-01), Von Bonin et al.
patent: 4729853 (1988-03-01), Von Bonin
patent: 4826884 (1989-05-01), Grace et al.
patent: 4977194 (1990-12-01), Haas et al.

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