Lubricating oil composition and mechanical apparatus

Abstract

A lubricating oil composition contains: (A) organopolysiloxane; and (B) at least one of a sulfur compound, a phosphorus compound and a zinc compound, the lubricating oil composition having a kinematic viscosity not less than 1 mm 2 /s and less than 40.0 mm 2 /s at 100 degrees C. The lubricating oil composition is favorably usable in mechanical devices such as a hydraulic device, a stationary gear, an automobile transmission, a motor/battery cooling device and a joint.

1 . A lubricating oil composition comprising:
 (A) an organopolysiloxane; and   (B) at least one compound selected from the group consisting of a sulfur compound, a phosphorus compound and a zinc compound,   wherein the lubricating oil composition has a kinematic viscosity not less than 1 mm 2 /s and less than 40.0 mm 2 /s at 100 degrees C.   
     
     
         2 . The lubricating oil composition of  claim 1 , wherein the component (B) is an extreme pressure agent or an antiwear agent. 
     
     
         3 . The lubricating oil composition of  claim 1 , further comprising (C) a friction modifier. 
     
     
         4 . The lubricating oil composition of  claim 3 , wherein the component (C) is at least one member selected from the group consisting of an oleic acid, oleylamine and oleic amide. 
     
     
         5 . The lubricating oil composition of  claim 1 , wherein the lubricating oil composition is adapted to be used in a mechanical device. 
     
     
         6 . The lubricating oil composition of claim  5 , wherein the mechanical device is selected from the group consisting of a hydraulic device, a stationary gear, an automobile transmission, a motor/battery cooling device and a joint. 
     
     
         7 . A mechanical device comprising the lubricating oil composition of  claim 5 . 
     
     
         8 . The mechanical device of  claim 7 , wherein the mechanical device is selected from the group consisting of a hydraulic device, a stationary gear, an automobile transmission, a motor/battery cooling device and a joint. 
     
     
         9 . The lubricating oil composition of  claim 1 , wherein the component (B) is an extreme pressure agent. 
     
     
         10 . The lubricating oil composition of  claim 1 , wherein the component (B) is an antiwear agent. 
     
     
         11 . The lubricating oil composition of  claim 1 , wherein the component (B) comprises a sulfur compound. 
     
     
         12 . The lubricating oil composition of  claim 1 , wherein the component (B) comprises a phosphorus compound. 
     
     
         13 . The lubricating oil composition of  claim 1 , wherein the component (B) comprises a zinc compound. 
     
     
         14 . The lubricating oil composition of  claim 2 , further comprising (C) a friction modifier. 
     
     
         15 . The lubricating oil composition of  claim 3 , wherein the component (C) comprises an oleic acid. 
     
     
         16 . The lubricating oil composition of  claim 3 , wherein the component (C) comprises oleylamine. 
     
     
         17 . The lubricating oil composition of  claim 3 , wherein the component (C) comprises oleic amide. 
     
     
         18 . The lubricating oil composition of  claim 14 , wherein the component (C) comprises an oleic acid. 
     
     
         19 . The lubricating oil composition of  claim 14 , wherein the component (C) comprises oleylamine. 
     
     
         20 . The lubricating oil composition of  claim 14 , wherein the component (C) comprises oleic amide.