Synthetic resins and stabilizer compositions for synthetic resin

Details Synthetic resins and stabilizer compositions for synthetic resin Synthetic resins and stabilizer compositions for synthetic resin

1990-03-12

1993-08-24

Morgan, Kriellion S.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524117, 25240024, 252403, C08K 534, C08K 552

Patent

active

052389790

ABSTRACT:
Stabilizers for enhancing the resistance of synthetic resins to deterioration when exposed to elevated temperatures and/or ultraviolet light comprising from about 0.001 to about 10 parts by weight of a bisphenol phosphite having the formula ##STR1## wherein R.sub.1 is tertiary-butyl or tertiary-amyl, R.sub.2 is alkyl having from one to about nine carbon atoms, R.sub.3 is hydrogen or alkyl having from one to about four carbon atoms, and R.sub.4 is alkyl having from one to about thirty carbon atoms; and from about 0.001 to about 10 parts by weight of a phenol having the formula ##STR2## wherein R.sub.5 is alkyl having from one to about four carbon atoms; and R.sub.6 is hydrogen or alkyl having from one to about four carbon atoms; and stabilized synthetic resin compositions comprising such stabilizers.

REFERENCES:
patent: 4252750 (1981-02-01), Buysch et al.
patent: 4351759 (1982-09-01), Spivack
patent: 4495320 (1985-01-01), Chasar

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