Norbornene-substituted bisphenol antioxidants

Abstract

The antioxidants of the formulae I and II ##STR1## in which R.sub.1 is methyl or H, R.sub.2 is H or methyl, R.sub.3 is H or C.sub.1 -C.sub.4 alkyl, R.sub.4 is C.sub.1 -C.sub.5 alkyl, R.sub.5 is C.sub.1 -C.sub.5 alkyl, and the group Z is CH.sub.2 or O, are particularly suitable for stabilizing styrene (co)polymers.

Dependencies are inferred from the claim text.