Styrylation of phenol in the presence of cation-exchange resins. Influence of the product composition on its stabilizing performance in rubber

Alkylation of isobornylphenols with styrene in the presence of p-toluenesulfonic acid

“…Bulky substituents that effectively shield the OH group enhance the stability of phenoxy radicals and hence their inhibitory activity. Phenol derivatives with tert-butyl groups in the orthopositions are the most widely known [2,4]. Phenols containing phenylethyl fragments are used to stabilize polyolefins, latexes, and materials based on natural and synthetic rubber [1,5,6].…”

“…Phenol derivatives with tert-butyl groups in the orthopositions are the most widely known [2,4]. Phenols containing phenylethyl fragments are used to stabilize polyolefins, latexes, and materials based on natural and synthetic rubber [1,5,6]. It is known [7] that phenols containing terpene fragment exceed their analogs with tert-butyl substituents in antioxidant activity.…”