Titanium compounds and complexes as additives in lubricants
A lubricating composition comprising an oil of lubricating viscosity, 1 to 1000 parts per million by weight of titanium in the form of an oil-soluble titanium-containing material, and at least one additional lubricant additive provides beneficial effects on properties such as deposit control, oxidation, and filterability in engine oils.
1. A method for lubricating a heavy-duty diesel internal combustion engine, comprising supplying to said engine a lubricating composition comprising:
(a) an oil of lubricating viscosity;
(b) 1 to 1000 parts per million by weight of titanium in the form of an oil-soluble titanium-containing material having a number average molecular weight of less than 20,000 selected from the group consisting of titanium alkoxides;
(c) an antioxidant other than a Ti-containing antioxidant, and
(d) a metal containing detergent other than a Ti-containing detergent.
2. The method of claim 1 wherein the amount of titanium is about 1 to less than 50 parts per million by weight.
3. The method of claim 1 wherein the amount of molybdenum in the composition is less than 150 parts per million by weight.
4. The method of claim 1 wherein said lubricating composition further comprises at least one additive selected from the group consisting of
(e) anti-wear agents and
(f) dispersants.
5. The method of claim 4 wherein the anti-wear agent comprises a phosphorus-containing anti-wear agent.
6. The method of claim 4 wherein the composition contains less than about 1200 parts per million by weight of phosphorus.
7. A lubricating composition comprising:
(a) an oil of lubricating viscosity;
(b) about 1 to less than 50 parts per million by weight of titanium in the form of an oil-soluble titanium-containing material selected from the group consisting of titanium alkoxides; and
(c) at least one additive selected from the group consisting of
(i) anti-wear agents,
(ii) dispersants,
(iii) antioxidants, and
(iv) detergents.
8. A method for preparing a lubricating composition comprising combining the components set forth in claim 7 .
9. A composition prepared by combining the components of claim 8 .
10. A method for lubricating a heavy-duty diesel internal combustion engine, comprising supplying to said engine a lubricating composition comprising:
(a) an oil of lubricating viscosity;
(b) 1 to 1000 parts per million by weight of titanium in the form of titanium (IV) isopropoxide;
(c) an antioxidant other than a Ti-containing antioxidant, and
(d) a metal containing detergent other than a Ti-containing detergent.
11. The method of claim 1 wherein the oil-soluble titanium-containing material comprises titanium (IV) 2-ethylhexoxide.
12. The lubricant composition of claim 7 wherein the oil-soluble titanium-containing material comprises titanium (IV) 2-ethylhexoxide.