Flame retarded polyurethane foams having reduced discoloration

Details Flame retarded polyurethane foams having reduced discoloration Flame retarded polyurethane foams having reduced discoloration

1977-05-20

1979-03-06

Czaja, Donald E.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

252 81, 252402, 260 457P, 260 458SN, 521115, 521121, 521906, C08K 546, C08K 552

Patent

active

041432193

ABSTRACT:
The discoloration of low density polyurethane foams produced with certain flame retardants is reduced by incorporating phenothiazine into the foam. The phenothiazine can be employed by admixing with the flame retardant from about 0.25 to about 5.0 percent phenothiazine by weight of the flame retardant.

REFERENCES:
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patent: 3468842 (1969-09-01), Mollica et al.
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patent: 3574149 (1971-04-01), Harrington
patent: 3637542 (1972-01-01), Doerge et al.
patent: 3714077 (1973-01-01), Cobbledick et al.
patent: 3793240 (1974-02-01), Smith
patent: 3847843 (1974-11-01), Dany et al.
patent: 4005034 (1977-01-01), Weil
patent: 4010211 (1977-03-01), Preston et al.
patent: 4045378 (1977-08-01), Maxwell

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