Dibenzylphenolic antioxidiants

Details Dibenzylphenolic antioxidiants Dibenzylphenolic antioxidiants

C - Chemistry, Metallurgy

07

C

260/619.1, 260/5

C07C 39/00 (2006.01) C07C 37/16 (2006.01) C07C 39/15 (2006.01) C07C 39/367 (2006.01) C07C 43/23 (2006.01) C07C 49/82 (2006.01) C08K 5/13 (2006.01) C09K 15/08 (2006.01) C10L 1/183 (2006.01) C10M 129/10 (2006.01)

Patent

CA 1234154

ABSTRACT DIBENZYLPHENOLIC ANTIOXIDANT COMPOUNDS AND PROCESS FOR THEIR PREPARATION Phenols having an unsubstituted ortho- or para-position are benzylated by reaction with a benzyl alcohol in contact with an activated alumina catalyst, especially gamma-alumina, at a temperature sufficient to maintain the reactants in the vapor phase. Particularly disclosed are 2,6-dibenzyl-4-substituted phenols which may be optionally substituted in the 3 and 5 positions. The preferred 4-position substituents are alkyls, cycloalkyls, halogens, aramatics, hydroxy, alkoxys, alkenyls and hydrocarbonyls. The 2,6-dibenzyl-4-substituted compounds show good antioxidant activity.

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