NANOPARTICLE-CONTAINING LUBRICATING OIL COMPOSITIONS

• US 20090048129A1
• Filed: 08/07/2008
• Published: 02/19/2009
• Est. Priority Date: 01/31/2006
• Status: Abandoned Application

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Nakagawa, Akira, Mabuchi, Yutaka
• Application Number:
  US12/188,048
• Publication Number:
  US 20090048129A1
• Time in Patent Office: Days
• US Class Current: 508/172
• CPC Class Codes: C10M 125/02 Carbon; Graphite
• CPC Class Codes: C10M 125/04 Metals; Alloys
• CPC Class Codes: C10M 125/08 Metal carbides or hydrides
• CPC Class Codes: C10M 161/00 Lubricating compositions characterised by the additive being a mixture of a macromolecular compound and a non-macromolecular compound, each of these compounds being essential
• CPC Class Codes: C10M 169/044 the additives being a mixture of non-macromolecular and macromolecular compounds
• CPC Class Codes: C10M 2201/041 Carbon; Graphite; Carbon black
• CPC Class Codes: C10M 2201/061 Carbides; Hydrides; Nitrides
• CPC Class Codes: C10M 2201/062 Oxides; Hydroxides; Carbonates or bicarbonates
• CPC Class Codes: C10M 2205/0285 used as base material
• CPC Class Codes: C10M 2209/084 Acrylate; Methacrylate
• CPC Class Codes: C10M 2209/104 of alkylene oxides containing two carbon atoms only
• CPC Class Codes: C10M 2209/108 etherified
• CPC Class Codes: C10M 2217/024 containing monomers having an unsaturated radical bound to an amido or imido group
• CPC Class Codes: C10M 2223/04 Phosphate esters
• CPC Class Codes: C10N 2020/06 Particles of special shape or size
• CPC Class Codes: C10N 2030/06 Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• CPC Class Codes: C10N 2030/54 Fuel economy
• CPC Class Codes: C10N 2060/06 by epoxydes or oxyalkylation reactions
• CPC Class Codes: C10N 2060/09 Treatment with nitrogen containing compounds

Abstract

To provide a nanoparticle-containing lubricating oil composition which demonstrates a low friction coefficient and realizes a further fuel economy. A nanoparticle-containing lubricating oil composition comprising a base oil, an additive having hydroxyl group, and nanoparticle. A nanoparticle-containing lubricating oil composition comprising a base oil, an ashless friction modifier having hydroxyl group, and nanoparticle. A nanoparticle-containing lubricating oil composition comprising a base oil, an additive having hydroxyl group, and nanoparticle having a particle diameter of 1 to 100 nm. A nanoparticle-containing lubricating oil composition comprising a base oil, an ashless friction modifier having hydroxyl group, and nanoparticle having a particle diameter of 1 to 100 nm.

Claims

1. A nanoparticle-containing lubricating oil composition comprising a lubricating oil including an oxygen-containing base oil or an oxygen-containing base oil containing an oxygen-containing additive, characterized in that the lubricating oil contains nanoparticle.

3. A nanoparticle-containing lubricating oil composition as claimed in claim 1, wherein all or a part of the oxygen-containing additive is an ashless friction modifier.

4. A nanoparticle-containing lubricating oil composition as claimed in claim 1, wherein the nanoparticle has a particle diameter ranging from 1 to 100 nm.

5. A nanoparticle-containing lubricating oil composition as claimed in claim 1, wherein the nanoparticle is contained in an amount ranging from 0.05 to 3%.

6. A nanoparticle-containing lubricating oil composition as claimed in claim 1, wherein the nanoparticle is contained in an amount ranging from 0.1 to 0.6 part by weight based on 100 parts by weight of total of the base oil and the additive.

7. A nanoparticle-containing lubricating oil composition as claimed in claim 6, wherein the nanoparticle is contained in an amount ranging from 0.3 to 0.5 part by weight based on 100 parts by weight of total of the base oil and the additive.

8. A nanoparticle-containing lubricating oil composition as claimed in claim 1, wherein all or a part of the nanoparticle is oxide or carbide.

9. A nanoparticle-containing lubricating oil composition as claimed in claim 8, wherein all or a part of the oxide is alumina.

10. A nanoparticle-containing lubricating oil composition as claimed in claim 1, wherein all or a part of the nanoparticle is a carbon material whose main component is carbon.

11. A nanoparticle-containing lubricating oil composition as claimed in claim 10, wherein all or a part of the carbon material is soot.

12. A nanoparticle-containing lubricating oil composition as claimed in claim 10, wherein all or a part of the carbon material is diamond-like carbon.

13. A nanoparticle-containing lubricating oil composition as claimed in claim 10, wherein all or a part of the carbon material is diamond.

14. A nanoparticle-containing lubricating oil composition as claimed in claim 13, wherein the nanoparticle formed of the diamond is of single crystal.

15. A nanoparticle-containing lubricating oil composition as claimed in claim 13, wherein the nanoparticle formed of diamond has a particle diameter of not larger than 10 nm.

16. A lubricating oil composition as claimed in claim 1, wherein a nonionic surface active agent is mixed in order to disperse the particle in the lubricating oil.

17. A lubricating oil composition as claimed in claim 16, wherein the surface active agent is a mixture of an ether-based surface active agent and a phosphorus-based surface active agent.

18. A lubricating oil composition as claimed in claim 17, wherein the surface active agent is a mixture of polyoxyethylenealkyl ether and polyoxyethylenealkyletherphosphate.

19. A lubricating oil composition as claimed in claim 18, wherein the surface active agent includes polyoxyethylenealkyl ether in an amount ranging from 5 to 15%, and polyoxyethylenealkyletherphosphate in an amount ranging from 85 to 95%.

20. A lubricating oil composition as claimed in claim 17, wherein the surface active agent is a mixture of polyoxyethylenedialkylphenyl ether and polyoxyethylenealkylphenylphosphate.

21. A lubricating oil composition as claimed in claim 20, wherein the surface active agent includes polyoxyethylenealkylphenyl ether in an amount ranging from 10 to 15%, and polyoxyethylenealkyletherphosphate in an amount ranging from 85 to 90%.

22. A lubricating oil composition as claimed in claim 17, wherein the surface active agent comprises a mixture of polyoxyethylenealkylphenyl ether and polyoxyethylenealkylphenyletherphosphate

2. A nanoparticle-containing lubricating oil composition comprising a base oil, an oxygen-containing additive, and nanoparticle.