Use of a monoester in a lubricant composition for vehicle transmissions

Patent metadata

Field	Value
Publication number	US-2026092233-A1
Application number	US-202319110164-A
Country	US
Kind code	A1
Filing date	Sep 14, 2023
Priority date	Sep 15, 2022
Publication date	Apr 2, 2026
Grant date	—

Abstract

The present invention relates to the use of a composition comprising 1-methylheptyl laurate as a lubricant composition for transmissions.

First claim

1 .- 12 . (canceled)

13 . A method of using a composition comprising 1-methylheptyl laurate as a lubricating composition for transmissions.

14 . The method according to claim 13 , wherein the transmissions are (i) transmissions in internal combustion engines and/or (ii) reduction gears in electric motors.

15 . The method according to claim 13 , wherein the efficiency of transmissions is improved.

16 . The method according to claim 13 , wherein the fuel consumption of a vehicle equipped with the transmission component is reduced when the transmission is lubricated by means of said lubricating composition.

17 . The method according to claim 13 , wherein the transmissions are reduction gears in electric motors and wherein the efficiency performance of reduction gears in the electric motors is improved.

18 . The method according to claim 13 , wherein the transmissions are transmissions of an electric or hybrid vehicle and wherein the autonomy of the battery of the electric or hybrid vehicle is extended.

19 . The method according to claim 13 , wherein the lubricating composition comprises 5 to 50% by weight of 1-methylheptyl laurate, relative to the total weight of the lubricating composition.

20 . The method according to claim 13 , wherein the composition comprises:
from 5 to 50% by weight of 1-methylheptyl laurate, and from 50 to 95% by weight of one or more base oils different from 1-methylheptyl laurate,
with respect to the total weight of the lubricating composition.

21 . The method according to claim 13 , wherein said lubricating composition has a kinematic viscosity at 100° C. ranging from 1 to 6 mm 2 /s.

22 . The method according to claim 13 , wherein 1-methylheptyl laurate has a carbon content of biological origin of at least 90% by weight relative to the total weight of the carbon atoms.

23 . The method according to claim 13 , characterized in that said lubricating composition comprises, in addition to 1-methylheptyl laurate, at least one additive chosen from antioxidants, additives improving the viscosity index, pour point depressants, anti-foam agents, anticorrosion agents, anti-wear and/or extreme-pressure additives, friction modifiers, detergents, dispersants and mixtures thereof.

24 . The method according to claim 23 , wherein the additive or additives represent from 0.01 to 20% by weight, relative to the total weight of the lubricating composition.

25 . A method for lubricating at least one mechanical part of a transmission member of motor vehicles, the method comprising at least one step wherein the mechanical part is brought into contact with at least one lubricating composition comprising 1-methylheptyl laurate.

26 . The method according to claim 25 , wherein the motor vehicle is light or heavy vehicles.

27 . The method according to claim 25 , wherein the transmission member is selected from a gearbox, axles, a reduction gear.

28 . The method according to claim 25 , wherein the composition comprises:
from 5 to 50% by weight of 1-methylheptyl laurate, and from 50 to 95% by weight of one or more base oils different from 1-methylheptyl laurate,
with respect to the total weight of the lubricating composition.

29 . The method according to claim 25 , wherein 1-methylheptyl laurate has a carbon content of biological origin of at least 90% by weight relative to the total weight of the carbon atoms.

30 . The method according to claim 25 , characterized in that said lubricating composition comprises, in addition to 1-methylheptyl laurate, at least one additive chosen from antioxidants, pour point depressants, anti-foam agents, anticorrosion agents, and mixtures thereof.

31 . The method according to claim 30 , wherein the additive or additives represent from 0.1 to 15% by weight, relative to the total weight of the lubricating composition.

Assignees

• Totalenergies Onetech

Inventors

• Robineau Gaël
• Limoges Alice
• Crozet Delphine

Classifications

• C10N2040/25

  Internal-combustion engines · CPC title

• C10N2040/04

  Oil-bath; Gear-boxes; Automatic transmissions; Traction drives · CPC title

• C10M2207/2815

  used as base material · CPC title

• C10M2205/0285

  used as base material · CPC title

• C10M111/04

  at least one of them being a macromolecular organic compound · CPC title