US2008020954A1PendingUtilityA1

High viscosity novel base stock lubricant extreme viscosity blends

52
Individually held — no corporate assignee on recordPriority: Jun 6, 2006Filed: Jun 6, 2007Published: Jan 24, 2008
Est. expiryJun 6, 2026(expired)· nominal 20-yr term from priority
Inventors:Heather M. HaighJames T. CareyAngela S. Galiano-RothMargaret M. Wu
C10M 171/04C10N 2030/18C10N 2030/02C10M 2203/1085C10M 2205/173C10N 2030/10C10N 2040/08C10M 2203/1006C10M 2205/163C10M 2203/1025C10N 2040/25C10N 2020/011C10N 2030/68C10M 2207/2825C10N 2070/00C10M 2205/0206C10M 2205/0285C10M 2207/2855C10N 2030/00C10M 2205/143C10M 2205/223C10N 2030/08C10N 2020/04C10N 2040/04C10N 2020/02C10M 111/04C10M 2207/2805C10M 2203/065
52
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Claims

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 300 cSt, Kv100° C. and a tight molecular weight distribution as a function of viscosity. The second base stock comprises a viscosity less than 100 cSt, Kv100° C. The lubricant formulation provides favorable properties.

Claims

exact text as granted — not AI-modified
1 . A lubricating oil, comprising 
 a) at least two base stocks;    b) a first base having a viscosity at least 300 cSt, Kv100° 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, Kv100° C.    
     
     
         2 . The lubricating oil of  claim 1  wherein the viscosity difference between the first and the second base stocks is greater than 250 cSt, Kv100° 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, Kv100° C. and no more than 100 cSt, Kv100° 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 greater than 400 cSt, Kv100° 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 60 cSt, Kv100° C.  
     
     
         11 . The lubricating oil of  claim 1  wherein the viscosity difference between the first base stock and the second base stock is greater than 400 cSt, Kv100° C.  
     
     
         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 300 cSt, Kv100° C.;    c) a second base stock comprising a oil with a viscosity less than 100 cSt, Kv100° C.    
     
     
         14 . The lubricating oil of  claim 13  wherein the first base stock is greater than 250 cSt, Kv100° 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, Kv100° 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 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 13  wherein the viscosity difference between the first base stock and the second base stock is greater than 300 cSt, Kv100° C.  
     
     
         23 . The lubricating oil of  claim 13  wherein the viscosity difference between the first base stock and the second base stock is greater than 400 cSt, Kv100° 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 300 cSt, Kv100° 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 100 cSt, Kv100° C.;    c) blending the first and second base stock lubricant to produce the lubricating oil.    
     
     
         25 . The lubricating oil of  claim 24  wherein the viscosity difference between the first and the second base stocks is greater than 250 cSt, Kv100° C.  
     
     
         26 . The lubricating oil of  claim 24  wherein the high viscosity base stock is a metallocene catalyzed PAO base stock.  
     
     
         27 . The lubricating oil 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 lubricating oil of  claim 24  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 lubricating oil of  claim 24  further comprising a third base stock.  
     
     
         30 . The lubricating oil 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, Kv100° C. and no more than 100 cSt, Kv100° C., Group V base stock, including ester base stock, alkylated aromatic and any combination thereof.  
     
     
         31 . The lubricating oil of  claim 24  wherein the first base stock has a viscosity greater than 300 cSt, Kv100° C.  
     
     
         32 . The lubricating oil of  claim 24  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, Kv100° C., the fourth base stock comprising an alkylated aromatic base stock.  
     
     
         33 . The lubricating oil of  claim 24  wherein the second base stock has a viscosity greater than 1.5 cSt and less than 40 cSt, Kv100° C.  
     
     
         34 . The lubricating oil of  claim 24  wherein the viscosity difference between the first base stock and the second base stock is greater than 400.  
     
     
         35 . The lubricating oil 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).

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