Lubricating oil composition, mechanical device equipped with lubricating oil composition, and method for producing lubricating oil composition

Abstract

A lubricating oil composition containing a lubricating base oil (A), a neutral phosphorus-based compound (B), an acidic phosphorus-based compound (C), a sulfur-based compound (D) and an organic molybdenum compound (E).

1 . A lubricating oil composition, comprising a lubricating base oil (A), a neutral phosphorus-based compound (B), an acidic phosphorus-based compound (C), a sulfur-based compound (D) and an organic molybdenum compound (E). 
     
     
         2 . The lubricating oil composition according to  claim 1 , wherein the organic molybdenum compound (E) is a compound represented by the following formula (1) 
       
         
           
           
               
               
           
         
         wherein R 1  to R 4  are each independently a hydrocarbon group having 4 to 18 carbon atoms, and X 1  to X 4  are each independently an oxygen atom or a sulfur atom. 
       
     
     
         3 . The lubricating oil composition according to  claim 2 , wherein R 1  to R 4  are each independently an alkyl group having 4 to 18 carbon atoms, an alkenyl group having 4 to 18 carbon atoms, a cycloalkyl group having 4 to 18 carbon atoms, an aryl group having 6 to 18 carbon atoms, an alkylaryl group having 7 to 18 carbon atoms or an arylalkyl group having 7 to 18 carbon atoms. 
     
     
         4 . The lubricating oil composition according to  claim 1 , wherein a content of the organic molybdenum compound (E) is 0.01 mass % or more and 1.0 mass % or less based on a total amount of the lubricating oil composition. 
     
     
         5 . The lubricating oil composition according to  claim 1 , wherein a flash point of the lubricating base oil (A) is 172° C. or higher. 
     
     
         6 - 7 . (canceled) 
     
     
         8 . A mechanical device, comprising the lubricating oil composition according to  claim 1 . 
     
     
         9 . The mechanical device according to  claim 8 , wherein the mechanical device is a hydraulic device, a stationary transmission device, an automobile transmission device or a cooling device of a motor/battery. 
     
     
         10 . A method for producing a lubricating oil composition, comprising mixing a lubricating base oil (A), a neutral phosphorus-based compound (B), an acidic phosphorus-based compound (C), a sulfur-based compound (D) and an organic molybdenum compound (E). 
     
     
         11 . A method of lubricating a mechanical device, comprising contacting the mechanical device with the lubricating oil composition according to  claim 1 . 
     
     
         12 . The method of lubricating a mechanical device according to  claim 11 , wherein the mechanical device is a hydraulic device, a stationary transmission device, an automobile transmission device or a cooling device of a motor/battery.