Solid lubricant and composition

Abstract

A solid lubricant and composition useful for lubricating the flanges of locomotive wheels, railcar wheels, rail track and in applications where it is desirable to reduce friction when metal contacts metal. The solid lubricant having from about twenty-five percent to about seventy percent by volume of a polymeric carrier, about five to seventy-five percent by volume of organic and inorganic extreme pressure additives, about zero to twenty percent by volume synthetic extreme pressure anti-wear liquid oil, and about zero to one percent by volume optical brightener.

I claim:  
     
         1 . A solid lubricant composition comprising: 
 (a) from about 25% to about 70% by volume of a polymeric carrier;    (b) from about 5% to about 75% by volume of a lubricant powder;    (c) from greater than 0% to about 20% by volume of a synthetic extreme pressure anti-wear liquid oil; and    (d) from greater than 0% to about 1% by volume of an optical brightener.    
     
     
         2 . The solid lubricant composition of  claim 1 , wherein said polymeric carrier is selected from the group consisting of: a linear low-density polyethylene, low density polyethylene, a polyolefin and a synthetic wax.  
     
     
         3 . The solid lubricant composition of  claim 1 , wherein said polymeric carrier is selected from the group consisting of: a linear high-density polyethylene, high-density polyethylene, high-density polypropylene and high-density methylpentene.  
     
     
         4 . The solid lubricant composition of  claim 1 , wherein said lubricant powder is selected from one or more of the group consisting of graphite and molybdenum disulfide.  
     
     
         5 . The solid lubricant composition of  claim 1 , wherein said lubricant powder is selected from one or more of the group consisting of graphite, molybdenum disulfide, talc, mica, and calcium carbonate.  
     
     
         6 . The solid lubricant composition of  claim 1 , consisting of about 5% by volume of said synthetic extreme pressure anti-wear liquid oil.  
     
     
         7 . The solid lubricant composition of  claim 1 , consisting of about 1% by weight of said optical brightener.  
     
     
         8 . A solid lubricant composition comprising: 
 (a) from about 25% to about 70% by volume of a polymeric carrier;    (b) from about 5% to about 75% by volume of a lubricant powder;    (c) from about 0% to about 20% by volume of a synthetic extreme pressure anti-wear liquid oil; and    (d) from greater than 0% to about 1% by volume of an optical brightener.    
     
     
         9 . The solid lubricant composition of  claim 8 , wherein said polymeric carrier is selected from the group consisting of: a linear low-density polyethylene, low density polyethylene, a polyolefin and a synthetic wax.  
     
     
         10 . The solid lubricant composition of  claim 8 , wherein said polymeric carrier is selected from the group consisting of: a linear high-density polyethylene, high-density polyethylene, high-density polypropylene and high-density methylpentene.  
     
     
         11 . The solid lubricant composition of  claim 8 , wherein said lubricant powder is selected from one or more of the group consisting of graphite and molybdenum disulfide.  
     
     
         12 . The solid lubricant composition of  claim 8 , wherein said lubricant powder is selected from one or more of the group consisting of graphite, molybdenum disulfide, talc, mica, and calcium carbonate.  
     
     
         13 . The solid lubricant composition of  claim 8 , consisting of about 5% by volume of said synthetic extreme pressure anti-wear liquid oil.  
     
     
         14 . The solid lubricant composition of  claim 8 , consisting of about 1% by weight of said optical brightener.  
     
     
         15 . A solid lubricant composition comprising: 
 (a) from about 25% to about 70% by volume of a polymeric carrier;    (b) from about 5% to about 75% by volume of a lubricant powder;    (c) from greater than 0% to about 20% by volume of a synthetic extreme pressure anti-wear liquid oil; and    (d) from about 0% to about 1% by volume of an optical brightener.    
     
     
         16 . The solid lubricant composition of  claim 15 , wherein said polymeric carrier is selected from the group consisting of: a linear low-density polyethylene, low density polyethylene, a polyolefin and a synthetic wax.  
     
     
         17 . The solid lubricant composition of  claim 15 , wherein said polymeric carrier is selected from the group consisting of: a linear high-density polyethylene, high-density polyethylene, high-density polypropylene and high-density methylpentene.  
     
     
         18 . The solid lubricant composition of  claim 15 , wherein said lubricant powder is selected from one or more of the group consisting of graphite and molybdenum disulfide.  
     
     
         19 . The solid lubricant composition of  claim 15 , wherein said lubricant powder is selected from one or more of the group consisting of graphite, molybdenum disulfide, talc, mica, and calcium carbonate.  
     
     
         20 . The solid lubricant composition of  claim 15 , consisting of about 5% by volume of said synthetic extreme pressure anti-wear liquid oil.  
     
     
         21 . The solid lubricant composition of  claim 15 , consisting of about 1% by weight of said optical brightener.