Lubricating Compositions

Abstract

The invention provides a lubricating composition containing hydrocarbyl-capped polyoxyalkylene polyol. The invention further provides lubricating compositions containing the hydrocarbyl-capped polyoxyalkylene polyol; and a method for lubricating a mechanical device with the lubricating composition.

1 . A lubricating composition comprising about 1 wt % to about 99 wt % of the hydrocarbyl-capped polyoxyalkylene polyol, wherein the hydrocarbyl-capped group of the polyoxyalkylene polyol comprises a residue of a linear or branched monohydric alcohol containing about 6 or more carbon atoms. 
   
   
       2 . The lubricating composition of  claim 1 , wherein the hydrocarbyl-capped polyoxyalkylene polyol is a mono-capped hydrocarbyl-capped polyoxyalkylene polyol, a di-capped hydrocarbyl-capped polyoxyalkylene polyol, or mixtures thereof. 
   
   
       3 . The lubricating composition of  claim 1 , wherein the hydrocarbyl-capped group of the polyoxyalkylene polyol comprises a residue of a branched monohydric alcohol containing about 6 or more carbon atoms. 
   
   
       4 . The lubricating composition of  claim 1 , wherein the hydrocarbyl-capped group of the polyoxyalkylene polyol comprises a residue of a linear monohydric alcohol containing about 11 or more carbon atoms. 
   
   
       5 . The lubricating composition of  claim 1 , wherein the hydrocarbyl-capped polyoxyalkylene polyol is derived from a homopolymer of an alkylene oxide. 
   
   
       6 . The lubricating composition of  claim 1 , wherein the hydrocarbyl-capped polyoxyalkylene polyol is derived from a copolymer of two or more alkylene oxides. 
   
   
       7 . The lubricating composition of  claim 1  further comprises a phosphorus-containing acid, salt or ester, or mixtures thereof. 
   
   
       8 . The lubricating composition of  claim 7 , wherein the phosphorus-containing acid, salt or ester is present in the lubricating composition in ranges of about 0.01 wt % to about 20 wt %, or about 0.05 wt % to about 10 wt %, or about 0.1 wt % to about 5 wt % of the lubricating composition. 
   
   
       9 . The lubricating composition of  claim 1  further comprises a non-phosphorus extreme pressure agent, or mixtures thereof. 
   
   
       10 . The lubricating composition of  claim 9 , wherein the non-phosphorus extreme pressure agent is selected from the group consisting of a boron-containing compound, a sulphur-containing compound, and mixtures thereof. 
   
   
       11 . The lubricating composition of  claim 9 , wherein the non-phosphorus extreme pressure agent is present at about 0.01 wt % to about 20 wt %, or about 0.05 wt % to about 10 wt %, or about 0.1 wt % to about 8 wt % of the lubricating composition. 
   
   
       12 . A method of lubricating a mechanical device with a lubricating composition of any one of the preceding claims. 
   
   
       13 . The method of  claim 12 , wherein the mechanical device is a driveline device. 
   
   
       14 . The method of  claim 13 , wherein the driveline device is selected from at least of the group consisting of an axle, a gear, a gearbox and a transmission. 
   
   
       15 . The method of  claim 14 , wherein the transmission is selected from at least of the group consisting of manual transmissions, continuously variable transmissions, infinitely variable transmissions, toroidal transmissions, continuously slipping torque converted clutches, automatic transmissions, stepped automatic transmissions, traction drive transmissions and dual clutch transmissions.