Lubricant composition

Patent metadata

Field	Value
Publication number	US-9914894-B2
Application number	US-201314411008-A
Country	US
Kind code	B2
Filing date	Jun 28, 2013
Priority date	Jun 29, 2012
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

The present disclosure concerns a lubricant composition including: at least one base oil; and at least two glycerol esters E 1 and E 2 , ester E 1 being an ester of glycerol and of a C 12 -C 26 carboxylic acid and ester E 2 being an ester of glycerol and of a C 4 -C 10 carboxylic acid. The lubricant composition has good friction properties, and the use thereof promotes fuel savings.

First claim

The invention claimed is:

1. A lubricant composition comprising at least one base oil and at least two glycerol esters E 1 and E 2 , glycerol ester E 1 being selected from glycerol linoleates and mixtures thereof, glycerol ester E 2 being selected from glycerol heptanoates and mixtures thereof, the ester E 1 is a mixture of glycerol monoesters, glycerol diesters, glycerol triesters and free glycerol and the ester E 2 is a mixture of glycerol monoesters, glycerol diesters, glycerol triesters and free glycerol, the sum of the masses of the glycerol esters E 1 and E 2 represents 0.5 to 2% by mass, relative to the total mass of the lubricant composition, and the mass ratio of the glycerol ester E 1 and the glycerol ester E 2 is between 10:1 and 1:10.

2. The lubricant composition according to claim 1 , having a level of sulphated ash less than or equal to 0.8% measured according to the standard ASTM D874.

3. The lubricant composition according to claim 1 , having a level of phosphorus less than or equal to 900 ppm measured according to the standard ASTM D5185.

4. The lubricant composition according to claim 1 , having a level of sulphur less than or equal to 0.32% measured according to the standard ASTM D5185.

5. The lubricant composition according to claim 1 , having a kinematic viscosity at 100° C. measured according to the standard ASTM D445 between 3.8 and 41 cSt.

6. The lubricant composition according to claim 1 , being free from molybdenum-based friction modifying additive such as Mo-DTC.

7. A process for reducing the fuel consumption of a light vehicle, heavy goods vehicle or vehicle, the process comprising a step of bringing a lubricant composition into contact with at least one mechanical part of an engine of the vehicle, the lubricating composition comprising at least one base oil and at least two glycerol esters E 1 and E 2 , glycerol ester E 1 being selected from glycerol linoleates and mixtures thereof, glycerol ester E 2 being selected from glycerol heptanoates and mixtures thereof, the ester E 1 being a mixture of glycerol monoesters, glycerol diesters, glycerol triesters and free glycerol and the ester E 2 being a mixture of glycerol monoesters, glycerol diesters, glycerol triesters and free glycerol, the sum of the masses of the glycerol esters E 1 and E 2 represents 0.5 to 2% by mass, relative to the total mass of the lubricant composition, and the mass ratio of the glycerol ester E 1 and the glycerol ester E 2 is between 10:1 and 1:10.

8. An engine oil comprising at least one lubricant composition as defined in claim 1 .

9. The engine oil according to claim 8 that is of grade 5W-30 according to the SAE J300 classification.

10. The engine oil according to claim 8 having a viscosity index greater than or equal to 130.

11. A hydraulic oil, transmission oil, gear oil, power steering fluid, shock absorber fluid, brake fluid comprising at least one lubricant composition as defined in claim 1 .

12. A method of at least two glycerol esters E 1 and E 2 , in a base oil, the ester E 1 being selected from glycerol linoleates and mixtures thereof, the ester E 2 being selected from glycerol heptanoates and mixtures thereof, the method comprising reducing fuel consumption of light vehicles, heavy goods vehicles or ships, the ester E 1 being a mixture of glycerol monoesters, glycerol diesters, glycerol triesters and free glycerol and the ester E 2 being a mixture of glycerol monoesters, glycerol diesters, glycerol triesters and free glycerol, the sum of the masses of the glycerol esters E 1 and E 2 represents 0.5 to 2% by mass, relative to the total mass of the lubricant composition, and the mass ratio of the glycerol ester E 1 and the glycerol ester E 2 is between 10:1 and 1:10.

13. A process for lubricating at least one mechanical part of an engine, the process comprising a step in which the mechanical part is brought into contact with at least one lubricant composition, the lubricating composition comprising at least one base oil and at least two glycerol esters E 1 and E 2 , glycerol ester E 1 being selected from glycerol linoleates and mixtures thereof, glycerol ester E 2 being selected from glycerol heptanoates and mixtures thereof, the ester E 1 being a mixture of glycerol monoesters, glycerol diesters, glycerol triesters and free glycerol and the ester E 2 being a mixture of glycerol monoesters, glycerol diesters, glycerol triesters and free glycerol, the sum of the masses of the glycerol esters E 1 and E 2 represents 0.5 to 2% by mass, relative to the total mass of the lubricant composition, and the mass ratio of the glycerol ester E 1 and the glycerol ester E 2 is between 10:1 and 1:10.

14. The lubricant composition according to claim 1 , wherein the glycerol ester E 1 comprises glycerol linoleate and the glycerol ester E 2 comprises glycerol heptanoate, the glycerol linoleate having a concentration of 1% by mass relative to the total mass of the lubricant composition, and the glycerol heptanoate having a concentration of 0.5% by mass relative to the total mass of the lubricant composition.

Assignees

• Total Marketing Services

Inventors

• Iovine Raphaele
• Pizard Carine
• Marechal Philippe

Classifications

• C10M2219/068

  Thiocarbamate metal salts · CPC title

• C10N2030/54

  Fuel economy · CPC title

• C10M2223/045

  Metal containing thio derivatives · CPC title

• C10M2215/28

  Amides; Imides · CPC title

• C10M2205/028

  containing aliphatic monomers having more than four carbon atoms · CPC title