Stabilization of polyether polyols and polyurethane foams prepar

Details Stabilization of polyether polyols and polyurethane foams prepar Stabilization of polyether polyols and polyurethane foams prepar

1980-04-21

1981-06-23

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521121, 521128, 521130, C08G 1814

Patent

active

042751730

ABSTRACT:
Polyurethane foams are prepared from polyols stabilized against oxidative degradation with a synergistic combination of a sterically hindered phenol and 4,4'-bis(.alpha.,.alpha.-dimethylbenzyl)diphenyl amine in which a portion of either the phenol or the amine or a portion of both have been replaced with a phenothiazine compound.

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patent: 4021385 (1977-05-01), Austin et al.
patent: 4070304 (1978-01-01), Hinze
patent: 4143219 (1979-03-01), Hensch
patent: 4146687 (1979-03-01), Reale

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