High viscosity novel base stock lubricant viscosity blends

Abstract

A lubricant formulation and method of blending a lubricant formulation is disclosed. The lubricant formulation comprises at least two base stocks. The first base stock comprises a viscosity greater than 135 cSt, Kv 100° C. and a tight molecular weight distribution as a function of viscosity. The second base stock comprises a viscosity less than 60 cSt, Kv 100° C. The formulation also comprises a polyol ester. The lubricant formulation provides favorable properties.

1 . A lubricating oil, comprising
 a) at least two base stocks;   b) a first base having a viscosity at least 135 cSt, Kv 100° C. and the first base stock having a molecular weight distribution (MWD) as a function of viscosity at least 10 percent less than algorithm
     MWD= 0.2223+1.0232*log( Kv  at 100° C. in cSt); 
   c) a second base stock with a viscosity less than 100 cSt, Kv 100° C.;   d) a polyol ester having a viscosity of less than 15 cSt, KV 100° C.   
     
     
         2 . The lubricating oil of  claim 1  wherein the viscosity difference between the first and the second base stocks is greater than 90 cSt, Kv 100° C. 
     
     
         3 . The lubricating oil of  claim 1  wherein the first base stock is a metallocene-catalyzed PAO base stock. 
     
     
         4 . The lubricating oil of  claim 1  wherein the second base stock is chosen from the group consisting of GTL base stock, wax derived base stock, Poly-Alpha-Olefin (PAO), Brightstocks, Brightstocks with PIB, Group I base stocks, Group II base stocks, Group III base stocks, Group V base stocks, Group VI base stocks, and any combination thereof. 
     
     
         5 . The lubricating oil of  claim 1  further comprising at least one additive, the additive chosen from the group consisting of antiwear, antioxidant, defoamant, demulsifier, detergent, dispersant, metal passivator, friction reducer, rust inhibitor, and any combination thereof. 
     
     
         6 . The lubricating oil of  claim 1  further comprising a third base stock. 
     
     
         7 . The lubricating oil of  claim 6 , wherein the third base stock is chosen from a group consisting of a PAO with a viscosity of at least 1.5 cSt, Kv 100° C. and no more than 60 cSt, Kv 100° C., a Group V base stock including ester base stock, alkylated aromatic and any combination thereof. 
     
     
         8 . The lubricating oil of  claim 6  wherein the first base stock has a viscosity at least 150 cSt, Kv 100° C. 
     
     
         9 . The lubricating oil of  claim 7  wherein the third base stock, is an alkylated naphthalene or alkylated benzene base stocks. 
     
     
         10 . The lubricating oil of  claim 1  wherein the second base stock has a viscosity greater than 1.5 and less than 40 cSt, Kv 100° C. 
     
     
         11 . The lubricating oil of  claim 1  wherein the lubricating oil has an air release of less than 5 minutes using ASTM D3427 75° C. time to 0.2 percent air. 
     
     
         12 . The lubricating oil of  claim 1  wherein the first base stock has a molecular weight distribution less than algorithm:
     MWD= 0.41667+0.725*log( Kv  at 100° C. in cSt).   
     
     
         13 . A lubricating oil, comprising
 a) at least two base stocks;   b) a first base stock comprising a metallocene catalyzed PAO with a viscosity greater than 135 cSt, Kv 100° C.;   c) a second base stock comprising a oil with a viscosity less than 60 cSt, Kv 100° C.;   d) a polyol ester having a viscosity of less than 15 cSt, KV 100° C.   
     
     
         14 . The lubricating oil of  claim 13  wherein the first base stock is greater than 90 cSt, Kv 100° C. 
     
     
         15 . The lubricating oil of  claim 13  wherein the first base stock has a molecular weight distribution (MWD) as a function of viscosity at least 10 percent less than algorithm
     MWD= 0.2223+1.0232*log( Kv  at 100° C. in cSt).   
     
     
         16 . The lubricating oil of  claim 13  wherein the second base stock has a viscosity greater than 1.5 cSt, Kv 100° C. 
     
     
         17 . The lubricating oil of  claim 13  further comprising an alkylated naphthalene and an additive package. 
     
     
         18 . The lubricating oil of  claim 13  wherein the first base stock has a molecular weight distribution less than algorithm:
     MWD= 0.41667+0.725*log( Kv  at 100° C. in cSt).   
     
     
         19 . The lubricating oil of  claim 13  wherein the second base stock is chosen from the group consisting of GTL lubricants, wax derived lubricants, Poly Alpha Olefin, Brightstocks, Brightstocks with PIB, Group I base stocks, Group II base stocks, Group III base stocks, Group V and any combination thereof. 
     
     
         20 . The lubricating oil of  claim 13  further comprising an additive, the additive chosen from the group consisting of antiwear, antioxidant, defoamant, demulsifier, detergent, dispersant, metal passivator, friction reducer, rust inhibitor, and any combination thereof. 
     
     
         21 . The lubricating oil of  claim 13  further comprising at least one additive chosen to obtain favorable lubricant properties from the group consisting of micropitting, air release, pour point, low temperature viscosity, pour point, shear stability, lower oil operating temperature, energy efficiency and any combination thereof. 
     
     
         22 . The lubricating oil of  claim 1  wherein the lubricating oil has an air release of less than 5 minutes using ASTM D3427 75° C. time to 0.2 percent air. 
     
     
         23 . The lubricating oil of  claim 13  wherein the viscosity difference between the first base stock and the second base stock is greater than 100 cSt, Kv 100° C. 
     
     
         24 . A method of blending a lubricating oil, comprising,
 a) obtaining a first synthetic base stock lubricant the first base stock having a viscosity greater than 135 cSt, Kv 100° C. and the first bases stock having a molecular weight distribution (MWD) as a function of viscosity at least 10 percent less than algorithm
     MWD =0.2223+1.0232*log( Kv  at 100° C. in cSt); 
   b) obtaining a second synthetic base stock lubricant, the second base stock lubricant has a viscosity less than 60 cSt, Kv 100° C.;   c) blending the first and second base stock lubricant to produce the lubricating oil;   d) a polyol ester having a viscosity of less than 15 cSt, KV 100° C.   
     
     
         25 . The method of  claim 24  wherein the viscosity difference between the first and the second base stocks is greater than 90 cSt, Kv 100° C. 
     
     
         26 . The method of  claim 24  wherein the high viscosity base stock is a metallocene catalyzed PAO base stock. 
     
     
         27 . The method of  claim 24  wherein the second base stock is chosen from the group consisting of GTL lubricants, wax derived lubricants, Poly Alpha Olefin, Brightstocks, Brightstocks with PIB, group I base stocks, Group II base stocks, Group III base stocks, Group V and any combination thereof. 
     
     
         28 . The method of  claim 24 , the lubricating oil further comprising at least one additive, the additive chosen from the group consisting of antiwear, antioxidant, defoamant, demulsifier, detergent, dispersant, metal passivator, friction reducer, rust inhibitor, and any combination thereof. 
     
     
         29 . The method of  claim 24 , the lubricating oil further comprising a third base stock. 
     
     
         30 . The method of  claim 29 , wherein the third base stock is chosen from a group consisting of a PAO with a viscosity of at least 1.5 cSt, Kv 100° C. and no more than 60 cSt, Kv 100° C., Group V base stock, including ester base stock, alkylated aromatic and any combination thereof. 
     
     
         31 . The method of  claim 24  wherein the first base stock has a viscosity at least 150 cSt, Kv 100° C. 
     
     
         32 . The method of  claim 24 , the lubricating oil further comprising at a third and fourth base stock, the third base stock comprising a PAO having a viscosity of at least 2 cSt and less than 60 cSt, Kv 100° C., the fourth base stock comprising an alkylated aromatic base stock. 
     
     
         33 . The method of  claim 24  wherein the second base stock has a viscosity greater than 1.5 cSt and less than 40 cSt, Kv 100° C. 
     
     
         34 . The method of  claim 24  wherein the lubricating oil has an air release of less than 5 minutes using ASTM D3427 75° C. time to 0.2 percent air. 
     
     
         35 . The method of  claim 24  wherein the first base stock has a molecular weight distribution less than algorithm:
     MWD= 0.41667+0.725*log( Kv  at 100° C. in cSt).   
     
     
         35 . The lubricating oil of  claim 1  wherein the lubricating oil provides an air release of less than 3 minutes using ASTM D3427 25° C. time to 0.2 percent air. 
     
     
         36 . The lubricating oil of  claim 13  wherein the lubricating oil provides an air release of less than 3 minutes using ASTM D3427 25° C. time to 0.2 percent air. 
     
     
         37 . The lubricating oil of  claim 1  wherein the lubricating oil provides an air release of less than 2 minutes using ASTM D3427 25° C. time to 0.2 percent air. 
     
     
         38 . The method of  claim 24  wherein the lubricating oil provides an air release of less than 3 minutes using ASTM D3427 25° C. time to 0.2 percent air.