Titanium compounds and complexes as additives in lubricants
AssigneeThe Lubrizol Corporation
InventorsThomas J. Derevjanik, Philip R. Scinto, Mary Galic Raguz, David Wilson, Virginia A. Carrick
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Abstract
A lubricating composition comprising an oil of lubricating viscosity, at least 25 parts per million by weight of titanium in the form of an oil-soluble titanium-containing material, and at least 70 parts per million boron in the form of a soluble boron compound such as a borate ester provides beneficial effects on properties such as deposit control, oxidation, and filterability in engine oils and lubrication of engines.
Claims13
A method for lubricating an internal combustion engine, comprising supplying to said engine a lubricating composition comprising:
- (a) at least about 80 percent by weight of an oil of lubricating viscosity;
- (b) at least about 25 parts per million and up to about 500 parts per million by weight of titanium in the form of an oil-soluble titanium alkoxide having a number average molecular weight of less than 20,000;
- (c) about 0.4 to about 5 percent by weight of an antioxidant other than a Ti-containing antioxidant, comprising a phenolic antioxidant, an aromatic amine, a sulfurized olefin, or a molybdenum compound,
- (d) about 0.2 to about 5 percent by weight of an overbased alkali metal- or calcium-containing salicylate detergent other than a Ti-containing detergent, and
- (e) at least about 70 parts per million and up to about 105 parts per million by weight of boron in the form of a soluble boron compound.
A lubricating composition comprising:
- (a) at least about 80 percent by weight of an oil of lubricating viscosity;
- (b) at least about 25 parts per million and up to about 500 parts per million by weight of titanium in the form of an oil-soluble titanium alkoxide having a number average molecular weight of less than 20,000;
- (c) about 0.4 to about 5 percent by weight of an antioxidant other than a Ti-containing antioxidant, comprising a phenolic antioxidant, an aromatic amine, a sulfurized olefin, or a molybdenum compound,
- (d) about 0.2 to about 5 percent by weight of an overbased alkali metal- or calcium-containing salicylate detergent other than a Ti-containing detergent, and
- (e) at least about 70 parts per million and up to about 105 parts per million by weight of boron in the form of a soluble boron compound.
Dependencies are inferred from the claim text.