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US 2003/0153469 A1Published application
Automatic transmission fluid additive comprising reaction product of hydrocarbyl acrylates and dihydrocarbyldithiophosphoric acids
AssigneeEthyl Corporation
InventorNubar Ozbalik
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Abstract
The present invention provides a power transmission lubricating composition containing a base oil, a dispersant, a lubricant additive produced by the reaction of a dihydrocarbyldithio-phosphoric acid and a hydrocarbyl acrylate, and optionally a viscosity index improver. Improved friction performances in automatic and continuously variable transmissions are achieved by utilizing the fluids of the present invention in ash-free lubricating oil compositions for transmissions and axles.
Claims41
A power transmitting fluid composition comprising:
- a) a major amount of an oil of lubricating viscosity;
- b) a minor amount of the reaction product of a hydrocarbyl acrylate with a dihydrocarbyldithiophosphoric acid;
- c) an ashless dispersant;
- and optionally
- d) a viscosity index improver
2 more elements
Dependencies are inferred from the claim text.