Cyclic phosphinic acid derivatives as stabilizers

Details Cyclic phosphinic acid derivatives as stabilizers Cyclic phosphinic acid derivatives as stabilizers

1997-12-19

1999-08-03

Ambrose, Michael G

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524119, 558 76, 558 82, C08K 55393, C07F 96574

Patent

active

059326425

ABSTRACT:
A description is given of novel compounds of formula I ##STR1## wherein R.sup.1, R.sub.2, R.sub.3, and R.sup.4 are hydrogen, alkyl, phenylalkyl, or alkoxy and where R.sub.5 and R.sub.6 are hydrogen or phenyl or together with the linking carbon atoms, are cycloalkenylene or cycloalkenylene which is interrupted by oxygen or sulfur. These compounds are useful as stabilizers for organic materials against oxidative, thermal or light-induced degradation.

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