Polyurethanes or isocyanurates from alkoxylated hydroxymethylfur

Details Polyurethanes or isocyanurates from alkoxylated hydroxymethylfur Polyurethanes or isocyanurates from alkoxylated hydroxymethylfur

1981-08-10

1984-01-17

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521116, 521131, 521164, 521166, 521174, 528 48, 528 53, 528 73, 544193, C08G 1814

Patent

active

044264607

ABSTRACT:
Improved rigid urethane and isocyanurate foam compositions having improved fire resistance are described. The urethane foams are based on furan compositions having the formula: ##STR1## and from about 100% to about 500% of a stoichiometric amount of a reactive polyisocyanate to produce a foamable composition, and sufficient blowing agent to create a foam having a density from about 1.5 to about 5 pounds per cubic foot. The product has improved fire resistence. The disclosure also described the method of decreasing the flame hazard potential of a rigid foam by adding two urethane or isocyanurate foaming ingredients the appropriate amount of one or more of the compositions listed above. The polymers described are chiefly made from adding propelyne oxide to bis (hydroxymethyl) furan.

REFERENCES:
patent: 4219485 (1980-08-01), Dunlop
patent: 4316935 (1982-02-01), Moss

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