Flame retardant, char-forming, flexible polyurethane foams

Details Flame retardant, char-forming, flexible polyurethane foams Flame retardant, char-forming, flexible polyurethane foams

1982-09-01

1984-07-03

Hoke, Veronica P.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

5211091, 521118, C08L 7504

Patent

active

044580347

ABSTRACT:
Flame retardant, char-forming, flexible polyurethane foams are described which include, in addition to suitable diisocyanates and other basic foam-forming components, a flame retardant material and a polyol which has substantially non-reactive hydroxyl groups with respect to the diisocyanate component under the conditions of the foam-forming reaction. Accordingly, the polyol remains in the finished polyurethane foam substantially unreacted. When the finished foam product is subjected to combustion conditions the flame retardant material and unreacted polyol combine to retard flame formation and to provide a dripless char. In addition to the flame retardant and char-forming characteristics, the flexible polyurethane foam is firm, permitting the manufacture of clickable foams.

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John W. Lyons, "Mechanisms of Fire Retardation With Phosphorus Compounds: Some Speculation"-Flammability of Solid Plastics-vol. 7, Fire & Flammability Series, C. Hilado, editor, Technomic Pub. Co., Westport Conn. (1974) pp. 228-337.
Florence L. Bennett et al., "Rigid Urethane Foam Extended With Starch," J. Cellular Plastics, Aug. 1977, pp. 369-373.

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