Lubricant Composition

Abstract

A lubricant composition which is suitable as a fluorine oil, fluorine grease, and which is excellent in stabilizability, as well as a lubricant composition which is suitable as a fluorine oil, fluorine grease, and which has an excellent rust prevention property while keeping a heat resistance.

1 . A lubricant composition comprising a fluorine-containing diamide compound represented by the following Formula (I), and a lubricating oil including a perfluoropolyether oil: 
       
         
           
           
               
               
           
         
         Y represents an oxygen atom (O), sulfur atom (S), CO group, SO group, or SO 2  group; 
         k is an integer of 1 to 5; 
         m is an integer of 1 to 10; and 
         n is an integer of 2 or more; 
         and wherein substituting positions of two substitutional groups possessed by each phenyl group may be any one of an ortho-position, meta-position, and para-position. 
       
     
     
         2 . A lubricant composition having an excellent rust prevention property, comprising a fluorine-containing diamide compound represented by the above Formula (I), and a lubricating oil:
 wherein,   Y represents an oxygen atom (O), sulfur atom (S), CO group, SO group, or SO 2  group;   k is an integer of 1 to 5;   m is an integer of 1 to 10; and   n is an integer of 1 or more;   and wherein substituting positions of two substitutional groups possessed by each phenyl group may be any one of an ortho-position, meta-position, and para-position.   
     
     
         3 . The lubricant composition of  claim 1 , wherein Y is an oxygen atom (O) or sulfur atom (S) in the Formula (I). 
     
     
         4 . The lubricant composition  claim 1 , wherein the lubricating oil includes a perfluoropolyether oil having a kinematic viscosity of 5 to 2,000 mm 2 /s (40° C.). 
     
     
         5 . The lubricant composition of  claim 1  further comprising a thickener. 
     
     
         6 . The lubricant composition of  claim 5 , wherein the thickener comprises fine particles having an averaged primary particle diameter of 0.01 to 50 μm, and the particles include at least one kind selected from fluororesin, silica, graphite, and carbon. 
     
     
         7 . The lubricant composition of  claim 5 , wherein the thickener includes at least one kind selected from metallic soap, metallic complex soap, urea, and metal aliphatic dicarboxylate. 
     
     
         8 . The lubricant composition of  claim 1 , usable for a bearing, gear, linear guide, or magnetic disk.