POLYPROPYLENE STABILIZED AGAINST OXIDATIVE DETERIORATION BY MIXTURE OF DIARYLAMINE DERIVATIVE AND STEREOSCOPICALLY HINDERED PHENOL

摘要

Polypropylene or peroxide-free polyolefins are stabilized against oxidative degradation by the presence therein of a stabilizing amount of an antioxidant composition which comprises: a) at least one diarylamine selected from the group consisting of alkyl-substituted diarylamine and aralkyl-substituted diarylyamine and; b) at least one sterically hindered phenol. b