Multifunctional lubricant additives and compositions thereof
AssigneeMobil Oil Corporation
InventorsLiehpao O. Farng, Andrew G. Horodysky
Life of this patent
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Abstract
Ashless thiophosphates derived from dihydrocarbyl dithiocarbamates have been found to be effective antioxidant/antiwear multifunctional additives for lubricants.
Claims26
An antioxidant/antiwear/extreme pressure/load carrying lubricant composition comprising a major proportion of an oil of lubricating viscosity or grease or other solid lubricant prepared therefrom and a minor amount of an ashless multifunctional antioxidant/antiwear/extreme pressure/load carrying additive product comprising a thiophosphate derived from a dihydrocarbyl dithiocarbamate.
An improved process for preparing an additive product of reaction having multifunctional antioxidant/antiwear/extreme pressure/load carrying lube oil characteristics comprising reacting substantially equimolar amounts of a non-metallic or metallic salt of a dihydrocarbyl dithiocarbamate, an a dihydrocarbyl halothiophosphate under ambient conditions of temperature and pressure or slightly higher temperatures or pressures for a time sufficient to produce said reaction product.
Dependencies are inferred from the claim text.