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US 4,729,848 AGranted
Metal salts of alkyl catechol dithiophosphoric acids and oil compositions containing the salts
AssigneeChevron Research Company
InventorsElaine S. Yamaguchi, Thomas V. Liston
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Abstract
Metal salts of alkyl catechol esters of dithiophosphoric acid suitable as additives in oil compositions are disclosed. Oil compositions containing the salts of such esters show improved extreme pressure/anti-wear and anti-oxidant properties.
Claims9
A compound of the formula:
- ##STR9## wherein R is alkyl containing 10 to 18 carbon atoms or mixtures thereof, M is an alkali or alkaline earth metal or transition metal, and n corresponds to the valence of M.
Dependencies are inferred from the claim text.