Synthetic lubricating oil compositions

Abstract

A lubricating base stock comprising an alkyl aromatic, a blend of additives, a blend of oil soluble polyalkylene glycols and a blend of polyolefins. In the lubricating base stock, the oil soluble polyaklyene glycols are homopolymers of ethylene oxide. Additionally, in the lubricating base stock, the blend of polyolefins comprises at least one metallocene polyolefin.

1 . A lubricating base stock comprising:
 a) an alkyl aromatic;   b) a blend of additives;   c) a blend of oil soluble polyalkylene glycols, wherein the oil soluble polyaklyene glycols are homopolymers of ethylene oxide; and   d) a blend of polyolefins,   wherein the blend of polyolefins comprise at least one metallocene polyolefin.   
     
     
         2 . The lubricating base stock of  claim 1 , wherein the amount of alkyl aromatic range from about 50 wt % to about 95 wt %. 
     
     
         3 . The lubricating base stock of  claim 1 , wherein the amount of additives range from about 0.005 wt % to about 5 wt %. 
     
     
         4 . The lubricating base stock of  claim 1 , wherein the amount of polyolefins range from about 10 wt % to about 20 wt %. 
     
     
         5 . The lubricating base stock of  claim 1 , wherein the amount of oil soluble polyalkylene glycols range from about 5 wt % to about 50 wt %. 
     
     
         6 . The lubricating base stock of  claim 1 , wherein the alkyl aromatic has one or more alkyl groups from about 6 to about 30 carbon atoms. 
     
     
         7 . The lubricating base stock of  claim 1 , wherein the additives are selected from the group consisting of: antioxidants, corrosion inhibitors, rust inhibitors, antiwear, extreme pressure, demulsifiers, and anti-foam. 
     
     
         8 . The lubricating base stock of  claim 1 , wherein the blend of polyolefins comprise at least three different types of polyolefins. 
     
     
         9 . The lubricating base stock of  claim 1 , wherein the blend of polyolefins comprise at least one oil soluble polyolefin and at least one metallocene polyolefin. 
     
     
         10 . The lubricating base stock of  claim 1 , wherein the amount of oil soluble polyolefin is greater than the amount of metallocene polyolefin. 
     
     
         11 . A lubricating base stock comprising:
 a) an alkyl aromatic;   b) a blend of additives, wherein the additives are selected from the group comprising of: alkylated phenyl-α-naphthylamine, alkylated diphenylamine antioxidant, metallic sulfonates, and combinations thereof;   c) a blend of oil soluble polyalkylene glycols from about 5 wt % to about 30 wt %, wherein the oil soluble polyaklyene glycols are homopolymers of ethylene oxide; and   d) a blend of polyolefins,   wherein the blend of polyolefins comprise at least one metallocene polyolefin.   
     
     
         12 . The lubricating base stock of  claim 11 , wherein the metallic sulfonate ranges from about 0.2 wt % to about 1.00 wt % of the lubricating base stock. 
     
     
         13 . The lubricating base stock of  claim 11 , wherein the metallic sulfonate ranges is selected from the group comprising of: calcium sulfonate, barium sulfonate, zinc sulfonate, magnesium sulfonate, sodium sulfonate, barium dinonylnaphthalene sulfonate, and calcium petroleum sulfonate, and combinations thereof. 
     
     
         14 . The lubricating base stock of  claim 11 , wherein the blend of additive comprise of alkylated phenyl-α-naphthylamine and alkylated diphenylamine antioxidant and the weight percent ratio of alkylated phenyl-α-naphthylamine to alkylated diphenylamine antioxidant is greater than 1:1. 
     
     
         15 . A method of manufacturing a lubricating base stock comprising the mixing of:
 a) an alkyl aromatic;   b) a blend of additives;   c) a blend of oil soluble polyalkylene glycols wherein the oil soluble polyaklyene glycols are homopolymers of ethylene oxide; and   d) a blend of polyolefins,   wherein the blend of polyolefins comprise at least one metallocene polyolefin.