Lubricant composition containing an antiwear agent
AssigneeThe Lubrizol Corporation
InventorsDaniel J. Saccomando, William R. S. Barton, Ewan E. Delbridge, Patrick E. Mosier
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Abstract
The invention provides a lubricant composition comprising an oil of lubricating viscosity and a protic acid salt of an N-hydrocarbyl-substituted gamma-(γ-) or delta-amino(thio)ester. The invention further relates to a method of lubricating a mechanical device with the lubricant composition.
Claims16
A lubricant composition comprising:
- (a) an oil of lubricating viscosity;
- (b) a protic salt of an N-hydrocarbyl-substituted aminoester, wherein the N-hydrocarbyl-substituted aminoester is represented by the formula
- wherein m is 0 or 1, R1 is hydrogen or a hydrocarbyl group, R2 and R3 are independently hydrocarbyl groups or together form a carbocyclic structure, R4 is a hydrocarbyl group of 1 to about 30 carbon atoms, and R5 is hydrogen, a hydrocarbyl group, or a group represented by —C(═O)—R6 where R6 is hydrogen, an alkyl group, or —O—R7, where R7 is a hydrocarbyl group of 1 to about 30 carbon atoms, provided that if R4 is methyl, then m is 0, and further provided that if m is 0, R1 is hydrogen;
- and
- (c) a thiadiazole.
A method of improving seals compatibility of a lubricant composition comprising adding to said lubricant composition a protic salt of an N-hydrocarbyl-substituted aminoester, wherein the N-hydrocarbyl-substituted aminoester is represented by the formula
- wherein m is 0 or 1, R1 is hydrogen or a hydrocarbyl group, R2 and R3 are independently hydrocarbyl groups or together form a carbocyclic structure, R4 is a hydrocarbyl group of 1 to about 30 carbon atoms, and R5 is hydrogen, a hydrocarbyl group, or a group represented by —C(═O)—R6 where R6 is hydrogen, an alkyl group, or —O—R7, where R7 is a hydrocarbyl group of 1 to about 30 carbon atoms, provided that if R4 is methyl, then m is 0, and further provided that if m is 0, R1 is hydrogen.
A method of improving corrosion inhibition of a lubricant composition comprising adding to said lubricant composition a protic salt of an N-hydrocarbyl-substituted aminoester, wherein the N-hydrocarbyl-substituted aminoester is represented by the formula
- wherein m is 0 or 1, R1 is hydrogen or a hydrocarbyl group, R2 and R3 are independently hydrocarbyl groups or together form a carbocyclic structure, R4 is a hydrocarbyl group of 1 to about 30 carbon atoms, and R5 is hydrogen, a hydrocarbyl group, or a group represented by —C(═O)-R6 where R6 is hydrogen, an alkyl group, or —O—R7, where R7 is a hydrocarbyl group of 1 to about 30 carbon atoms, provided that if R4 is methyl, then m is 0, and further provided that if m is 0, R1 is hydrogen.
A method of improving antiwear performance of a lubricant composition comprising adding to said lubricant composition a protic salt of an N-hydrocarbyl-substituted aminoester, wherein the N-hydrocarbyl-substituted aminoester is represented by the formula
- wherein m is 0 or 1, R1 is hydrogen or a hydrocarbyl group, R2 and R3 are independently hydrocarbyl groups or together form a carbocyclic structure, R4 is a hydrocarbyl group of 1 to about 30 carbon atoms, and R5 is hydrogen, a hydrocarbyl group, or a group represented by —C(═O)—R6 where R6 is hydrogen, an alkyl group, or where R7 is a hydrocarbyl group of 1 to about 30 carbon atoms, provided that if R4 is methyl, then m is 0, and further provided that if m is 0, R1 is hydrogen.
Dependencies are inferred from the claim text.