Lubricant additive composition, lubricating composition containing same and engine oil composition consisting of lubricating composition

Abstract

A lubricant additive composition including, as a component (A), an organic molybdenum compound represented by general formula (1) described in the specification, and as a component (B), an amine compound represented by general formula (2) described in the specification, wherein content of the component (B) is 1 to 20 parts by mass relative to 100 parts by mass of molybdenum atoms of the component (A), and a lubricating composition containing same.

1 . A lubricant additive composition comprising, as a component (A), an organic molybdenum compound represented by the following general formula (1), and as a component (B), an amine compound represented by the following general formula (2), wherein content of the component (B) is 1 to 20 parts by mass relative to 100 parts by mass of molybdenum atoms of the component (A): 
       
         
           
           
               
               
           
         
         wherein R 1  to R 4  respectively represent an alkyl group having 1 to 18 carbon atoms, and X 1  to X 4  respectively represent an oxygen atom or a sulphur atom; 
       
       
         
           
           
               
               
           
         
         wherein R 5  and R 6  respectively represent an alkyl group having 1 to 18 carbon atoms or an alkenyl group having 2 to 18 carbon atoms. 
       
     
     
         2 . A lubricating composition comprising a base oil, and the lubricant additive composition according to  claim 1 . 
     
     
         3 . The lubricating composition according to  claim 2 , further comprising, as a component (C), an alkaline earth metal salicylate. 
     
     
         4 . The lubricating composition according to  claim 2 , further comprising, as a component (D), an alkenyl succinimide dispersant. 
     
     
         5 . The lubricating composition according to  claim 2 , further comprising, as a component (E), a phenolic antioxidant. 
     
     
         6 . The lubricating composition according to  claim 2 , further comprising, as a component (F), a zinc dithiophosphate represented by the following general formula (3): 
       
         
           
           
               
               
           
         
         wherein R 7  to R 10  respectively represent an alkyl group having 3 to 14 carbon atoms. 
       
     
     
         7 . The lubricating composition according to  claim 2 , further comprising, as a component (G), at least one ashless friction regulator selected from the group consisting of polyhydric alcohol fatty acid partial esters, (poly)glycerol alkyl ethers, alkyl alkanolamines, alkenyl alkanolamines and fatty acid alkanolamides. 
     
     
         8 . An engine oil composition consisting of the lubricating composition according to  claim 1 . 
     
     
         9 . A method for suppressing corrosion of a copper component of a machine and improving lubrication ability by adding, to a base oil used for a lubricating composition, an organic molybdenum compound represented by the following general formula (1) and an amine compound represented by the following general formula (2), wherein the amine compound is added at 1 to 20 parts by mass relative to 100 parts by mass of molybdenum atoms of the organic molybdenum compound: 
       
         
           
           
               
               
           
         
         wherein R 1  to R 4  respectively represent an alkyl group having 1 to 18 carbon atoms, and X 1  to X 4  respectively represent an oxygen atom or a sulphur atom; 
       
       
         
           
           
               
               
           
         
         wherein R 5  and R 6  respectively represent an alkyl group having 1 to 18 carbon atoms or an alkenyl group having 2 to 18 carbon atoms.