Method for extending the useful life of dienic polymers which are sensitive to oxidative degradation and stabilized compositions resistant to oxidative degradation

Abstract

Method for extending the useful life of dienic polymers which are sensitive to oxidative degradation. According to this method such polymers are combined with a stabilizer effective amount of at least one tetrahydro-1,5-benzodiazapene compound of the formula: ##STR1## wherein R.sub.1 through R.sub.4 are independently selected from the group consisting of hydrogen, alkyl of 1 to 12 carbon atoms, cycloalkyl, aryl, aralkyl, provided further that R.sub.3 and R.sub.4 can collectively form a cyclic, alicyclic, aromatic or heterocyclic ring pendant from the two position of the above compound and R.sub.1 and R.sub.2 can collectively form an alicyclic ring. The polymeric compositions formed from dienic polymers and the above stabilizer are highly suitable to use in the preparation of components for the automotive and electronics markets.

Dependencies are inferred from the claim text.