GREASE COMPOSITION

• US 20110136708A1
• Filed: 07/14/2009
• Published: 06/09/2011
• Est. Priority Date: 08/28/2008
• Status: Active Grant

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Nakagawa, Akira, Mabuchi, Yutaka
• Granted Patent: US 8,445,415 B2
• Time in Patent Office: Days
• US Class Current: 508/122
• CPC Class Codes: C10M 141/12 at least one of them being an organic compound containing atoms of elements not provided for in groups C10M141/02 - C10M141/10
• CPC Class Codes: C10M 169/06 Mixtures of thickeners and additives
• 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 2201/10 Compounds containing silicon
• CPC Class Codes: C10M 2203/1006 used as base material
• CPC Class Codes: C10M 2205/0285 used as base material
• CPC Class Codes: C10M 2207/0406 used as base material
• CPC Class Codes: C10M 2207/1265 used as thickening agent
• CPC Class Codes: C10M 2207/1276 used as thickening agent
• CPC Class Codes: C10M 2207/1285 used as thickening agents
• CPC Class Codes: C10M 2207/2805 used as base material
• CPC Class Codes: C10M 2207/281 of (cyclo)aliphatic monocarboxylic acids
• CPC Class Codes: C10M 2207/2825 used as base material
• CPC Class Codes: C10M 2207/2835 used as base material
• CPC Class Codes: C10M 2207/289 containing free hydroxy groups
• CPC Class Codes: C10M 2209/1033 used as base material
• CPC Class Codes: C10M 2219/068 Thiocarbamate metal salts
• CPC Class Codes: C10N 2010/02 Groups 1 or 11
• CPC Class Codes: C10N 2010/04 : Groups 2 or 12
• CPC Class Codes: C10N 2010/06 : Groups 3 or 13
• CPC Class Codes: C10N 2010/12 : Groups 6 or 16
• CPC Class Codes: C10N 2020/02 : Viscosity; Viscosity index
• 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 2040/02 : Bearings
• CPC Class Codes: C10N 2040/046 : for traction drives
• CPC Class Codes: C10N 2050/10 : Semi-solids; greasy

Abstract

There is provided a grease composition, including: a base oil; a metal soap thickener formed of at least one metal selected from the group consisting of lithium, calcium, magnesium and aluminum and a fatty acid containing at least one selected from the group consisting of a hydroxyl group, a carboxyl group and a carboxylic acid metal salt group in each molecular structure; and nanoparticles formed of at least one selected from the group consisting of oxides, carbides and diamond materials.

Claims

1. A grease composition, comprising:

a base oil;

a metal soap thickener formed of a salt of at least one metal selected from the group consisting of lithium, calcium, magnesium and aluminum and a fatty acid containing at least one selected from the group consisting of a hydroxyl group, a carboxyl group and a carboxylic acid metal salt group in a molecular structure thereof and/or a salt of at least one metal selected from the group consisting of lithium calcium and aluminum and a fate acid; and

nanoparticles formed of single crystal diamond and have an average primary particle size of 5 nm or smaller.

4. The grease composition according to claim 1, wherein the base oil contains at least one selected from ester oils, ether oils and polyolefin oils.

5. The grease composition according to claim 1, further comprising an fatty acid ester.

2. (canceled)

3. (canceled)

6. A grease composition, comprising:

a base oil;

a metal soap thickener selected from the group consisting of lithium 12-hydroxystearate, lithium stearate, calcium stearate and magnesium stearate, aluminum stearate; and

nanoparticles formed of single crystal diamond and have an average primary particle size of 5 nm or smaller.

7. The grease composition according to claim 6, wherein the base oil contains at least one selected from ester oils, ether oils and polyolefin oils.

8. The grease composition according to claim 6, further comprising a fatty acid ester.