Flame retarded polyurethane foams with improved color qualities

Details Flame retarded polyurethane foams with improved color qualities Flame retarded polyurethane foams with improved color qualities

1977-06-22

1978-12-19

Czaja, Donald E.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

260 457P, 260 458N, 260 459QB, 521163, 521906, C08K 518, C08K 534, C08K 551

Patent

active

041305132

ABSTRACT:
The color qualities of low density polyurethane foams produced with certain flame retardants is improved by reducing scorch through incorporation of a mixture of diphenyl p-phenylenediamine and the reaction product of diphenylamine and acetone into the foam. The mixture can be employed by admixing with the flame retardant from about 0.5 to about 5.0 percent of said mixture by weight of the flame retardant. The weight ratio of diphenyl p-phenylenediamine to the reaction product of diphenylamine and acetone is from about 1:20 to about 20:1.

REFERENCES:
patent: 3574149 (1971-04-01), Harrington
patent: 3637542 (1972-01-01), Doerge et al.
patent: 3637573 (1972-01-01), Mise et al.
patent: 3798184 (1974-03-01), Cuscurida et al.
patent: 4005034 (1977-01-01), Weil

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