Aqueous graphite lubricant compositions

Abstract

A lubricant composition includes water, graphite, a thickener, and an alkylated diphenyl oxide sulfonate dispersant.

1 . A lubricant composition, comprising:
 water;   graphite;   a thickener; and   an alkylated diphenyl oxide sulfonate dispersant.   
     
     
         2 . The lubricant composition of  claim 1 , wherein the lubricant composition comprises 20 wt % to 60 wt % water based on a total weight of the lubricant composition. 
     
     
         3 . The lubricant composition of  claim 1 , wherein the lubricant composition comprises 10 wt % to 60 wt % of graphite based on a total weight of the lubricant composition. 
     
     
         4 . The lubricant composition of  claim 3 , wherein the graphite has a D90 particle diameter of from 0.5 μm to 5.0 μm. 
     
     
         5 . The lubricant composition of  claim 1 , wherein the alkylated diphenyl oxide sulfonate dispersant is a disulfonate. 
     
     
         6 . The lubricant composition of  claim 1 , wherein the lubricant composition comprises 0.01 wt % to 1.0 wt % of the dispersant based on a total weight of the lubricant composition. 
     
     
         7 . The lubricant composition of  claim 1 , wherein dispersant comprises a molecule having Structure (I): 
       
         
           
           
               
               
           
         
         wherein R 1  and R 2  are each independently selected from H and a C 5 -C 20  alkyl, further wherein each M +  is independently selected from the group consisting of Li, K and Na. 
       
     
     
         8 . The lubricant composition of  claim 7 , wherein each M +  is Na, R 1  is H, and R 2  is a C 12 -C 16  alkyl. 
     
     
         9 . The lubricant composition of  claim 8 , wherein the R 2  is a C 12  branched alkyl. 
     
     
         10 . The lubricant composition of  claim 8 , wherein the R 2  is a C 16  linear alkyl.