Antioxidant
AssigneeEthyl Corporation
InventorsJohn C. Wollensak, Kryn G. Ihrman, Paul G. Elsey
Life of this patent
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Abstract
Methylenebis(dicyclopentyl phenols) in which at least one cyclopentyl group is ortho to the phenolic hydroxy group are effective antioxidants in a broad range of organic materials including mineral and synthetic lubricating oil and polyolefins.
Claims16
An antioxidant compound or mixture of compounds having the formula ##STR2## wherein R.sub.1 and R.sub.2 are cyclopentyl groups and are bonded to their respective phenolic benzene rings at a location independently selected from the ortho and para positions, the methylene bridge being connected between the remaining ortho and para positions, and R.sub.3 and R.sub.4 are independently selected from the group consisting of hydrogen and C.sub.1-4 alkyl.
Dependencies are inferred from the claim text.