Lubricating composition based on aminated compounds

Abstract

A lubricant composition includes at least one base oil and at least one amine compound. The lubricant composition simultaneously has good anti-wear and fuel economy properties as well as good antioxidant properties.

1 . A lubricant composition comprising at least one base oil and at least one amine compound of formula (I) 
       
         
           
           
               
               
           
         
       
       in which:
 M represents a hydronium, sodium, potassium, lithium or ammonium cation; 
 R 1  represents a hydrogen atom or a linear or branched alkyl group, comprising from 1 to 30 carbon atoms; 
 R 2  represents a linear or branched alkyl group, comprising from 2 to 20 carbon atoms; 
 R 3  represents a linear or branched alkyl group, comprising from 2 to 20 carbon atoms; and 
 n represents 2, 3, 4, 5 or 6. 
 
     
     
         2 . The lubricant composition according to  claim 1  in which:
 M represents a sodium cation; 
 R 1  represents a linear or branched alkyl group, comprising from 5 to 20 carbon atoms; 
 R 2  represents a linear or branched alkyl group, comprising from 2 to 5 carbon atoms; 
 R 3  represents a linear or branched alkyl group, comprising from 2 to 5 carbon atoms; and 
 n represents 2, 3 or 4. 
 
     
     
         3 . The lubricant composition according to  claim 1  in which R 1  represents a linear alkyl group comprising from 5 to 20 carbon atoms. 
     
     
         4 . The lubricant composition according to  claim 1  comprising an amine compound of formula (Ia); 
       
         
           
           
               
               
           
         
       
     
     
         5 . The lubricant composition according to  claim 1  in which the content by weight of amine compound of formula (I) or (Ia) ranges from 0.01 to 3% with respect to the total weight of the composition. 
     
     
         6 . The lubricant composition according to any  claim 1  comprising at least one additive chosen from detergents, anti-wear additives, extreme-pressure additives, additional antioxidants, polymers improving the viscosity index, pour point improvers, anti-foaming agents, thickeners and mixtures thereof. 
     
     
         7 - 10 . (canceled) 
     
     
         11 . A method for reducing fuel consumption of a vehicle comprising at least one step of bringing a mechanical part of the vehicle engine into contact with a lubricant composition comprising at least one base oil and at least one amine compound of formula (I) 
       
         
           
           
               
               
           
         
       
       in which:
 M represents a hydronium, sodium, potassium, lithium or ammonium cation; 
 R 1  represents a hydrogen atom or a linear or branched alkyl group, comprising from 1 to 30 carbon atoms; 
 R 2  represents a linear or branched alkyl group, comprising from 2 to 20 carbon atoms; 
 R 3  represents a linear or branched alkyl group, comprising from 2 to 20 carbon atoms; and 
 n represents 2, 3, 4, 5 or 6; 
 
       wherein the lubricant composition reduces the fuel consumption of the vehicle. 
     
     
         12 . (canceled) 
     
     
         13 . A method for modifying the friction properties of a lubricant composition, comprising adding to the lubricant composition an amine compound of formula (I) 
       
         
           
           
               
               
           
         
       
       in which:
 M represents a hydronium, sodium, potassium, lithium or ammonium cation; 
 R 1  represents a hydrogen atom or a linear or branched alkyl group, comprising from 1 to 30 carbon atoms; 
 R 2  represents a linear or branched alkyl group, comprising from 2 to 20 carbon atoms; 
 R 3  a linear or branched alkyl group, comprising from 2 to 20 carbon atoms; and 
 n represents 2, 3, 4, 5 or 6. 
 
     
     
         14 . A method for reducing the oxidation of a lubricant composition, comprising adding to the lubricant composition—an amine compound of formula (I) as defined in  claim 1 . 
     
     
         15 . The lubricant composition according to  claim 2  in which R 1  represents a linear or branched alkyl group comprising from 9 to 15 carbon atoms. 
     
     
         16 . The lubricant composition according to  claim 3  in which R 1  represents a linear alkyl group comprising from 9 to 15 carbon atoms. 
     
     
         17 . The lubricant composition according to  claim 5 , in which the content by weight of amine compound of formula (I) or (Ia) ranges from 0.5 to 2% with respect to the total weight of the composition.