Lubricant and fuel additives derived from O,O-dialkyldithiophosphoric acid and a norbornyl reactant
AssigneeThe Lubrizol Corporation
InventorsRichard M. Lange, William C. Tritt, Stephen A. DiBiase
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Abstract
Reaction products of 5-norbornene-2,3-dicarboxylic anhydride O,O-dialkyldithiophosphate adduct of the formula ##STR1## have been found to be beneficial additives for functional fluids used in the machinery of motorized vehicles. These additives are effective extreme pressure agents and antiwear agents as well as antioxidants for use in such functional fluids as lubricating oils including automatic transmission fluids and hydraulic fluids.
Claims13
A lubricating composition comprising a major amount of an oil of lubricating viscosity and minor amount of a compound of the formula:
- ##STR10## wherein R is, independently, alkyl or aryl and X and Y are independently selected from the group consisting of hydrogen, hydrocarbyl carboxy, N-substituted carboxamide, thio- or dithiocarbamate, thioamide, thio acid or ester, a hydrocarbyl phosphorus containing radical, together are imide or N-hydrocarbyl substituted imide, provided that when X is alkyl carboxy, Y is not alkyl carboxy, or hydrogen and X and Y are not both hydrogen.
A method for improving the load bearing properties of lubricating composition of lubricating viscosity by admixing therewith a minor amount of an extreme pressure and an antiwear agent of the formula:
- ##STR11## wherein R is, independently, alkyl or aryl and X and Y are independently selected from the group consisting of hydrogen, hydrocarbyl carboxy, N-substituted carboxamide, thio- or dithiocarbamate, thioamide, thio acid or ester, a hydrocarbyl phosphorus containing radical, together are imide or N-hydrocarbyl substituted imide, provided that when X is alkyl carboxy, Y is not alkyl carboxy a hydrogen and X and Y are not both hydrogen.
A compound of the formula:
- ##STR12## wherein R is, independently, alkyl or aryl and X and Y are independently selected from the group consisting of N-substituted carboxamide, thioamide, thioester, dithioester, hydrocarbyl-containing dithiocarbamate, hydrocarbylthio, phosphate, phosphite, phosphonate, dithiophosphate, phosphoramide, or together represent imide or are N-hydrocarbyl imide.
Dependencies are inferred from the claim text.