Use of a monoester in a lubricant composition for vehicle transmissions

Abstract

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

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.