LUBRICANT COMPOSITION BASED ON METAL NANOPARTICLES

• US 20170073612A1
• Filed: 02/26/2015
• Published: 03/16/2017
• Est. Priority Date: 02/28/2014
• Status: Active Grant

• Current Assignee: Total Marketing Services SA (Totalenergies Se)
• Original Assignee: Total Marketing Services SA (Totalenergies Se)
• Inventors: THIEBAUT, Benoit, DASSENOY, Fabrice, USSA, Paula
• Granted Patent: US 11,015,141 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 171/06 Particles of special shape or size
• CPC Class Codes: C10M 2201/065 Sulfides; Selenides; Tellurides
• CPC Class Codes: C10M 2201/066 Molybdenum sulfide
• CPC Class Codes: C10M 2203/024 unsaturated
• CPC Class Codes: C10M 2205/0285 used as base material
• CPC Class Codes: C10M 2223/043 Ammonium or amine salts thereof
• CPC Class Codes: C10M 2223/045 Metal containing thio derivatives
• CPC Class Codes: C10M 2223/047 Thioderivatives not containing metallic elements
• CPC Class Codes: C10N 2010/04 Groups 2 or 12
• CPC Class Codes: C10N 2020/06 Particles of special shape or size
• CPC Class Codes: C10N 2030/02 Pour-point; Viscosity index
• CPC Class Codes: C10N 2030/06 Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• CPC Class Codes: C10N 2030/10 Inhibition of oxidation, e.g. anti-oxidants
• CPC Class Codes: C10N 2030/12 Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
• CPC Class Codes: C10N 2030/54 Fuel economy
• CPC Class Codes: C10N 2040/04 Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
• CPC Class Codes: C10N 2040/044 for manual transmissions
• CPC Class Codes: C10N 2050/015 Dispersions of solid lubricants

Abstract

The present disclosure relates to a lubricant composition including an anti-wear additive and metal nanoparticles. The lubricant composition according to the disclosure has, simultaneously, good stability as well as good, long-lasting friction properties.

Claims

1. A lubricant composition comprising a kinematic viscosity at 100°

C. measured according to standard ASTM D445 ranging from 4 to 50 cSt and further comprising at least one base oil, at least one compound comprising a dithiophosphate group and metal nanoparticles at a content by weight ranging from 0.01 to 2% with respect to a total weight of the lubricant composition.

2. The lubricant composition according to claim 1, wherein the metal of which the metal nanoparticle is included is selected from a group comprising one of:

tungsten, molybdenum, zirconium, hafnium, platinum, rhenium, titanium, tantalum, niobium, cerium, indium and tin.

3. The lubricant composition according to claim 1, wherein the metal nanoparticles are selected from a group comprising one of:

MoS₂, MoSe₂, MoTe₂, WS₂, WSe₂, ZrS₂, ZrSe₂, HfS₂, HfSe₂, PtS₂, ReS₂, ReSe₂, TiS₃, ZrS₃, ZrSe₃, HfS₃, HfSe₃, TiS₂, TaS₂, TaSe₂, NbS₂, NbSe₂ and NbTe₂.

4. The lubricant composition according to claim 1, wherein the metal nanoparticles are concentric polyhedrons with a multilayer or sheet structure.

5. The lubricant composition according to claim 1, wherein the content by weight of the metal nanoparticles ranges from 0.05 to 2% with respect to the total weight of the lubricant composition.

6. The lubricant composition according to claim 1, wherein an average size of the metal nanoparticles ranges from 5 to 600 nm.

7. The lubricant composition according to claim 1, wherein the compound comprising a dithiophosphate group is selected from a group comprising one of:

ammonium dithiophosphates, amine dithiophosphates, ester dithiophosphates and metal dithiophosphates, alone or in a mixture.

8. The lubricant composition according to claim 1, wherein the compound comprising the dithiophosphate group is a compound of formula (IV)

9. The lubricant composition according to claim 1, wherein the compound comprising the dithiophosphate group is a compound of formula (IV-a) or of formula (IV-b):

10. The lubricant composition according to claim 1, wherein the content by weight of the compound comprising the dithiophosphate group ranges from 0.1 to 5% with respect to the total weight of the lubricant composition.

11. The lubricant composition according to claim 1, further comprising an additive selected from:

polymers, antioxidants, anti-corrosion additives, friction modifiers different from the metal nanoparticles, and dispersants.

12. A method for lubricating a mechanical part, comprising bringing the mechanical part into contact with a lubricant composition comprising at least one base oil, at least one compound comprising a dithiophosphate group and metal nanoparticles at a content by weight ranging from 0.01 to 2% with respect to a total weight of the lubricant composition, the composition having a kinematic viscosity at 100°

C. measured according to standard ASTM D445 ranging from 4 to 50 cSt, wherein the lubricant composition lubricates the mechanical part.

13. The method according to claim 12, wherein the mechanical part is a mechanical part of motor vehicles.

14. A method for reducing fuel consumption of vehicles, comprising bringing a mechanical part of a vehicle engine into contact with a lubricant composition comprising at least one base oil, at least one compound comprising a dithiophosphate group and metal nanoparticles at a content by weight ranging from 0.01 to 2% with respect to a total weight of the lubricant composition, the composition having a kinematic viscosity at 100°

C. measured according to standard ASTM D445 ranging from 4 to 50 cSt, wherein the lubricant composition lubricates the mechanical part, and reducing the fuel consumption of the vehicles with the lubricant composition.

15. (canceled)