Lubricating oil compositions containing titanium complexes
AssigneeChevron Oronite Company LLC
InventorsGaurav Bhalla, Elaine S. Yamaguchi, Man Hon Tsang
Life of this patent
Estimating the term…
Abstract
A lubricating oil composition is disclosed which comprises (a) a major amount of an oil of lubricating viscosity; and (b) one or more non-halogen-containing oil-soluble titanium complexes comprising at least one ligand selected from the group consisting of (i) an anion of an α-, β- or γ-hydroxycarbonyl compound; (ii) an anion of an α-, β- or γ-hydroxycarboxylic acid, amide or ester; (iii) an anion of an α-, β- or γ-aminocarboxylic acid; and (iv) an anion of an α-, β- or γ-keto acid.
Claims23
A lubricating oil composition comprising (a) a major amount of an oil of lubricating viscosity;
- and (b) about 1600 ppm to about 3000 ppm as Ti metal, based on the total weight of the lubricating oil composition, of one or more non-halogen-containing oil-soluble titanium complexes comprising at least one ligand selected, from the group consisting of (i) an anion of an α-, β- or γ-hydroxycarbonyl compound;
- and (ii) an anion of an α-, β- or γ-hydroxycarboxylic acid, and wherein the lubricating oil composition has less than about 0.4 wt. % of sulfur and a sulfated ash content of no more than about 1.0 wt. % as determined by ASTM D874, and further wherein the lubricating oil composition is substantially free of any zinc dialkyldithiophosphate.
A method of reducing wear of metal parts in an internal combustion engine, the method comprising operating the engine with a lubricating oil composition comprising (a) a major amount of an oil of lubricating viscosity;
- and (b) about 1600 ppm to about 3000 ppm as Ti metal, based on the total weight of the lubricating oil composition, of one or more non-halogen-containing oil-soluble titanium complexes comprising at least one ligand selected from the group consisting of (i) an anion of an α-, β- or γ-hydroxycarbonyl compound;
- and (ii) an anion of an α-, β- or γ-hydroxycarboxylic acid, and wherein the lubricating oil composition has less than about 0.4 wt. % of sulfur and a sulfated ash content of no more than about 1.0 wt. % as determined by ASTM D874, and further wherein the lubricating oil composition is substantially free of any zinc dialkyldithiophosphate.
A lubricating oil composition consisting essentially of (a) a major amount of an oil of lubricating viscosity;
- (b) about 1500 ppm to about 3000 ppm as Ti metal, based on the total weight of the lubricating oil composition, of one or more non-halogen-containing oil-soluble titanium complexes comprising at least one ligand selected from the group consisting of (1) an anion of an α-, β- or γ-hydroxycarbonyl compound;
- (2) an anion of an α-, β- or γ-aminocarboxylic acid;
- and (3) an anion of an α-, β- or γ-keto acid;
- and (c) at least one additive selected from the group consisting of an antioxidant, dispersant, detergent, anti-wear agent, rust inhibitor, dehazing agent, demulsifying agent, metal deactivating agent, friction modifier, pour point depressant, antifoaming agent, corrosion inhibitor, dye, extreme pressure agent and mixtures thereof, and wherein the lubricating oil composition has less than about 0.4 wt. % of sulfur and a sulfated ash content of no more than about 1.0 wt, % as determined by ASTM D874, and further wherein the lubricating oil composition is substantially free of any zinc dialkyldithiophosphate.
A lubricating oil composition comprising (a) a major amount of an oil of lubricating viscosity;
- and (b) about 1600 ppm to about 3000 ppm as Ti metal, based on the total weight of the lubricating oil composition, of one or more non-halogen-containing oil-soluble titanium complexes comprising at least one ligand selected from the group consisting of (i) an anion of an α-, β- or γ-hydroxycarboxylic acid amide;
- (ii) an anion of an α-, β- or γ-hydroxycarboxylic acid ester;
- (iii) an anion of an α-, β- or γ-aminocarboxylic acid;
- and (iv) an anion of an α-, β- or γ-keto acid, and wherein the lubricating oil composition is substantially free of any zinc dialkyldithiophosphate.
Dependencies are inferred from the claim text.