Titanium compounds and complexes as additives in lubricants

• US 20060217271A1
• Filed: 03/27/2006
• Published: 09/28/2006
• Est. Priority Date: 03/28/2005
• Status: Active Grant

• Current Assignee: The Lubrizol Corporation (Berkshire Hathaway Incorporated)
• Original Assignee: The Lubrizol Corporation (Berkshire Hathaway Incorporated)
• Inventors: Vilardo, Jonathan S., Dohner, Brent R., Mosier, Patrick E., Brown, Jason R., Carrick, Virginia A., Abraham, William D., Lange, Richard M., Adams, Paul E.
• Granted Patent: US 7,727,943 B2
• Time in Patent Office: Days
• US Class Current: 508/165
• CPC Class Codes: C10M 159/12 Reaction products
• CPC Class Codes: C10M 159/18 Complexes with metals
• CPC Class Codes: C10M 163/00 Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential
• CPC Class Codes: C10M 169/04 Mixtures of base-materials and additives
• CPC Class Codes: C10M 2201/062 Oxides; Hydroxides; Carbonates or bicarbonates
• CPC Class Codes: C10M 2205/024 Propene
• CPC Class Codes: C10M 2205/04 containing aromatic monomers, e.g. styrene
• CPC Class Codes: C10M 2205/06 containing conjugated dienes
• CPC Class Codes: C10M 2207/021 having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 2207/026 with tertiary alkyl groups
• CPC Class Codes: C10M 2207/028 Overbased salts thereof
• CPC Class Codes: C10M 2207/10 Carboxylix acids; Neutral salts thereof
• CPC Class Codes: C10M 2207/262 derived from hydroxy substituted aromatic acids, e.g. salicylates
• CPC Class Codes: C10M 2207/289 containing free hydroxy groups
• CPC Class Codes: C10M 2209/086 polycarboxylic, e.g. maleic acid
• CPC Class Codes: C10M 2215/064 Di- and triaryl amines
• CPC Class Codes: C10M 2215/08 Amides
• CPC Class Codes: C10M 2215/28 Amides; Imides
• CPC Class Codes: C10M 2219/022 of hydrocarbons, e.g. olefines polyolefins C10M2221/041
• CPC Class Codes: C10M 2219/046 Overbasedsulfonic acid salts
• CPC Class Codes: C10M 2223/042 : Metal salts thereof
• CPC Class Codes: C10M 2223/045 : Metal containing thio derivatives
• CPC Class Codes: C10M 2227/065 : derived from Ti or Zr
• CPC Class Codes: C10N 2010/04 : Groups 2 or 12
• CPC Class Codes: C10N 2010/08 : Groups 4 or 14
• CPC Class Codes: C10N 2020/06 : Particles of special shape or size
• CPC Class Codes: C10N 2030/00 : Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
• CPC Class Codes: C10N 2030/04 : Detergent property or dispersant property
• CPC Class Codes: C10N 2030/10 : Inhibition of oxidation, e.g. anti-oxidants
• CPC Class Codes: C10N 2040/25 : Internal-combustion engines
• CPC Class Codes: C10N 2040/252 : Diesel engines
• CPC Class Codes: C10N 2060/00 : Chemical after-treatment of the constituents of the lubricating composition

Abstract

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.

Claims

1. A method for lubricating an internal combustion engine, comprising supplying to said engine a lubricating composition comprising:

(a) an oil of lubricating viscosity;

(b) about 1 to about 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;

(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 oil-soluble titanium-containing material comprises a titanium (IV) alkoxide or carboxylate.

3. The lubricating composition of claim 1 wherein the oil-soluble titanium-containing material comprises titanium (IV) isopropoxide.

4. The method of claim 1 wherein the oil-soluble titanium-containing material comprises a titanium-modified dispersant.

5. The method of claim 1 wherein the oil-soluble titanium-containing material comprises the reaction product of a titanium alkoxide and a hydrocarbyl-substituted-succinic anhydride

6. The method of claim 1 wherein the oil-soluble titanium-containing material comprises surface-modified TiO₂ nanoparticles.

7. The method of claim 1 wherein the amount of titanium is about 1 to less than 50 parts per million by weight.

8. The method of claim 1 wherein the amount of molybdenum in the composition is less than 150 parts per million by weight.

9. 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,

10. The method of claim 9 wherein the anti-wear agent comprises a phosphorus-containing anti-wear agent.

11. The method of claim 9 wherein the composition contains less than about 1200 parts per million by weight of phosphorus.

12. The method of claim 1 wherein the internal combustion engine is a heavy duty diesel engine.

13. 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, titanium modified dispersants, titanium salts of aromatic carboxylic acids, and titanium salts of sulfur-containing acids; and

(c) at least one additive selected from the group consisting of

(i) anti-wear agents,

(ii) dispersants,

(iii) antioxidants, and

(iv) detergents.

14. A method for preparing a lubricating composition comprising combining the components set forth in claim 13.

15. A composition prepared by combining the components of claim 14.