Aqueous graphite lubricant compositions comprising dispersants

Abstract

A lubricant composition includes water, graphite, a thickener and an alkylphenol ether sulfate dispersant.

1 . A lubricant composition, comprising:
 water;   graphite;   a thickener; and   an alkylphenol ether sulfate 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 thickener is a polysaccharide. 
     
     
         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 has structure (I): 
       
         
           
           
               
               
           
         
         wherein the variable R is a C 5 -C 20  alkyl, the variable x is an average value of 1.0 to 7.0, and the variable Z+ is selected from the group consisting of Li, K, NH 4  and Na. 
       
     
     
         8 . The lubricant composition of  claim 7 , wherein the variable Z+ of Structure (I) is NH 4 . 
     
     
         9 . The lubricant composition of  claim 8 , wherein the variable x of Structure (I) has an average value of 4.2. 
     
     
         10 . The lubricant composition of  claim 8 , wherein the variable R is a C 9  alkyl.