US2003207775A1PendingUtilityA1

Lubricating fluids with enhanced energy efficiency and durability

41
Priority: Apr 26, 2002Filed: Apr 26, 2002Published: Nov 6, 2003
Est. expiryApr 26, 2022(expired)· nominal 20-yr term from priority
Inventors:William SullivanThomas S. Coolbaugh
C10N 2040/044C10N 2040/042C10M 2207/2825C10N 2020/02C10N 2040/045C10M 2205/0285C10N 2030/06C10M 2205/173C10M 171/02C10N 2040/046C10M 169/04C10M 2203/1025C10M 2207/2835C10N 2040/04C10M 111/04
41
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Claims

Abstract

The present invention comprises novel lubricating compositions, automotive gear lubricating compositions, and fluids useful in the preparation of finished automotive gear lubricants and finished gear oils, and methods of preparation thereof. The novel lubricating compositions of the present invention comprise a high viscosity fluid blended with a lower viscosity fluid, wherein the final blend has a viscosity index greater than or equal to 175. In another embodiment, the novel lubricating compositions of the present invention comprise a major amount of a blend of a high viscosity fluid blended with a lower viscosity fluid, wherein the final blend has a viscosity index greater than or equal to 175. Preferably, the high viscosity fluid comprises a polyalphaolefin and/or the lower viscosity fluid comprises a synthetic hydrocarbon. In another embodiment, the novel lubricating compositions of the present invention further comprise one or more of an ester, mineral oil and/or hydroprocessed mineral oil.

Claims

exact text as granted — not AI-modified
We claim:  
     
         1 . A lubricating composition comprising: a high viscosity fluid, said high viscosity fluid having a viscosity of greater than or equal to 40 cSt. at 100° C. and less than or equal to 3,000 cSt. at 100° C., blended with a lower viscosity fluid, said lower viscosity fluid having a viscosity of less than or equal to 40 cSt. at 100° C., wherein the final blend of said high viscosity fluid and said lower viscosity fluid has a viscosity index greater than or equal to 175.  
     
     
         2 . The lubricating composition of  claim 1 , wherein said high viscosity fluid has a viscosity of greater than or equal to 60 cSt. at 100° C.  
     
     
         3 . The lubricating composition of  claim 1 , wherein said high viscosity fluid has a viscosity of less than or equal to 1,000 cSt. at 100° C.  
     
     
         4 . The lubricating composition of  claim 2 , wherein said high viscosity fluid has a viscosity of less than or equal to 1,000 cSt. at 100° C.  
     
     
         5 . The lubricating composition of  claim 1 , wherein said high viscosity fluid has a viscosity of greater than or equal to 80 cSt. at 100° C.  
     
     
         6 . The lubricating composition of  claim 1 , wherein said high viscosity fluid has a viscosity of less than or equal to 300 cSt. at 100° C.  
     
     
         7 . The lubricating composition of  claim 5 , wherein said high viscosity fluid has a viscosity of less than or equal to 300 cSt. at 100° C.  
     
     
         8 . The lubricating composition of  claim 1 , wherein said lower viscosity fluid has a viscosity of less than or equal to 10 cSt. at 100° C.  
     
     
         9 . The lubricating composition of  claim 1 , wherein said lower viscosity fluid has a viscosity of less than or equal to 6 cSt. at 100° C.  
     
     
         10 . The lubricating composition of  claim 8 , wherein said lower viscosity fluid has a viscosity of greater than or equal to 1.5 cSt. at 100° C.  
     
     
         11 . The lubricating composition of  claim 9 , wherein said lower viscosity fluid has a viscosity of greater than or equal to 1.5 cSt. at 100° C.  
     
     
         12 . The lubricating composition of  claim 1 , wherein said viscosity index is greater than or equal to 190.  
     
     
         13 . The lubricating composition of  claim 1 , wherein said high viscosity fluid and said lower viscosity fluid comprise base stocks.  
     
     
         14 . The lubricating composition of  claim 1 , further comprising an ester.  
     
     
         15 . The lubricating composition of  claim 1 , wherein said high viscosity fluid comprises a polyalphaolefin.  
     
     
         16 . The lubricating composition of  claim 1 , wherein said high viscosity fluid and said lower viscosity fluid comprise polyalphaolefins.  
     
     
         17 . The lubricating composition of  claim 1 , wherein said lower viscosity fluid comprises a synthetic hydrocarbon.  
     
     
         18 . The lubricating composition of  claim 1 , further comprising one or more of an ester, mineral oil and/or hydroprocessed mineral oil.  
     
     
         19 . The lubricating composition of  claim 15 , wherein said polyalphaolefin comprises from about 30% to about 60% by weight of the total of said lubricating composition.  
     
     
         20 . The lubricating composition of  claim 17 , wherein said synthetic hydrocarbon comprises less than or equal to 70% by weight of the total of said lubricating composition.  
     
     
         21 . The lubricating composition of  claim 14 , wherein said ester comprises less than or equal to 20% by weight of the total of said lubricating composition.  
     
     
         22 . The lubricating composition of  claim 18 , wherein said ester, mineral oil and/or hydroprocessed mineral oil comprise less than or equal to 20% by weight of the total of said lubricating composition.  
     
     
         23 . The lubricating composition of  claim 1 , further comprising one or more of: 
 thickeners, antioxidants, inhibitor packages, and/or anti-rust additives.    
     
     
         24 . The lubricating composition of  claim 1 , further comprising one or more of: 
 dispersants, detergents, friction modifiers, traction improving additives, demulsifiers, defoamants, chromophores (dyes), and/or haze inhibitors.    
     
     
         25 . The lubricating composition of  claim 23 , further comprising one or more of: 
 dispersants, detergents, friction modifiers, traction improving additives, demulsifiers, defoamants, chromophores (dyes), and/or haze inhibitors.    
     
     
         26 . The lubricating composition of  claim 1 , wherein said lubricating composition comprises a finished gear oil.  
     
     
         27 . The finished gear oil of  claim 26 , wherein the blend of said high viscosity fluid blended with said lower viscosity fluid comprises a major amount of said finished gear oil.  
     
     
         28 . The lubricating composition of  claim 1 , further comprising extreme pressure protection and anti-wear additives.  
     
     
         29 . The lubricating composition of  claim 1 , comprising an automatic transmission fluid, manual transmission fluid, transaxle lubricant, gear lubricant, open gear lubricant, enclosed gear lubricant, and/or tractor lubricant.  
     
     
         30 . The lubricating composition of  claim 1 , comprising a contact surface comprising at least a portion of an automatic transmission, manual transmission, transaxle, gear, open gear, enclosed gear, and/or tractor.  
     
     
         31 . An automotive gear lubricating composition comprising: a high viscosity fluid, said high viscosity fluid having a viscosity of greater than or equal to 40 cSt. at 100° C. and less than or equal to 3,000 cSt. at 100° C., blended with a lower viscosity fluid, said lower viscosity fluid having a viscosity of less than or equal to 40 cSt. at 100° C., wherein the final blend of said high viscosity fluid and said lower viscosity fluid has a viscosity index greater than or equal to 175.  
     
     
         32 . The automotive gear lubricating composition of  claim 31 , wherein said high viscosity fluid has a viscosity of greater than or equal to 60 cSt. at 100° C.  
     
     
         33 . The automotive gear lubricating composition of  claim 31 , wherein said high viscosity fluid has a viscosity of less than or equal to 1,000 cSt. at 100° C.  
     
     
         34 . The automotive gear lubricating composition of  claim 32 , wherein said high viscosity fluid has a viscosity of less than or equal to 1,000 cSt. at 100° C.  
     
     
         35 . The automotive gear lubricating composition of  claim 31 , wherein said high viscosity fluid has a viscosity of greater than or equal to 80 cSt. at 100° C.  
     
     
         36 . The automotive gear lubricating composition of  claim 31 , wherein said high viscosity fluid has a viscosity of less than or equal to 300 cSt. at 100° C.  
     
     
         37 . The automotive gear lubricating composition of  claim 35 , wherein said high viscosity fluid has a viscosity of less than or equal to 300 cSt. at 100° C.  
     
     
         38 . The automotive gear lubricating composition of  claim 31 , wherein said lower viscosity fluid has a viscosity of less than or equal to 10 cSt. at 100° C.  
     
     
         39 . The automotive gear lubricating composition of  claim 31 , wherein said lower viscosity fluid has a viscosity of less than or equal to 6 cSt. at 100° C.  
     
     
         40 . The automotive gear lubricating composition of  claim 38 , wherein said lower viscosity fluid has a viscosity of greater than or equal to 1.5 cSt. at 100° C.  
     
     
         41 . The automotive gear lubricating composition of  claim 39 , wherein said lower viscosity fluid has a viscosity of greater than or equal to 1.5 cSt. at 100° C.  
     
     
         42 . The automotive gear lubricating composition of  claim 31 , wherein said viscosity index is greater than or equal to 190.  
     
     
         43 . The automotive gear lubricating composition of  claim 31 , wherein said high viscosity fluid and said lower viscosity fluid comprise base stocks.  
     
     
         44 . The automotive gear lubricating composition of  claim 31 , further comprising an ester.  
     
     
         45 . The automotive gear lubricating composition of  claim 31 , wherein said high viscosity fluid comprises a polyalphaolefin.  
     
     
         46 . The automotive gear lubricating composition of  claim 31 , wherein said high viscosity fluid and said lower viscosity fluid comprise polyalphaolefins.  
     
     
         47 . The automotive gear lubricating composition of  claim 31 , wherein said lower viscosity fluid comprises a synthetic hydrocarbon.  
     
     
         48 . The automotive gear lubricating composition of  claim 31 , further comprising one or more of an ester, mineral oil and/or hydroprocessed mineral oil.  
     
     
         49 . The automotive gear lubricating composition of  claim 45 , wherein said polyalphaolefin comprises from about 30% to about 60% by weight of the total of said automotive gear lubricating composition.  
     
     
         50 . The automotive gear lubricating composition of  claim 47 , wherein said synthetic hydrocarbon comprises less than or equal to 70% by weight of the total of said automotive gear lubricating composition.  
     
     
         51 . The automotive gear lubricating composition of  claim 44 , wherein said ester comprises less than or equal to 20% by weight of the total of said automotive gear lubricating composition.  
     
     
         52 . The automotive gear lubricating composition of  claim 48 , wherein said ester, mineral oil and/or hydroprocessed mineral oil comprise less than or equal to 20% by weight of the total of said automotive gear lubricating composition.  
     
     
         53 . The automotive gear lubricating composition of  claim 31 , further comprising one or more of: thickeners, antioxidants, inhibitor packages, and/or anti-rust additives.  
     
     
         54 . The automotive gear lubricating composition of  claim 31 , further comprising one or more of: dispersants, detergents, friction modifiers, traction improving additives, demulsifiers, defoamants, chromophores (dyes), and/or haze inhibitors.  
     
     
         55 . The automotive gear lubricating composition of  claim 53 , further comprising one or more of: dispersants, detergents, friction modifiers, traction improving additives, demulsifiers, defoamants, chromophores (dyes), and/or haze inhibitors.  
     
     
         56 . The automotive gear lubricating composition of  claim 31 , wherein said automotive gear lubricating composition comprises a finished gear oil.  
     
     
         57 . The finished gear oil of  claim 56 , wherein the blend of said high viscosity fluid blended with said lower viscosity fluid comprises a major amount of said finished gear oil.  
     
     
         58 . The automotive gear lubricating composition of  claim 31 , further comprising extreme pressure protection and anti-wear additives.  
     
     
         59 . The automotive gear lubricating composition of  claim 31 , comprising an automatic transmission fluid, manual transmission fluid, transaxle lubricant, gear lubricant, open gear lubricant, enclosed gear lubricant, and/or tractor lubricant.  
     
     
         60 . The automotive gear lubricating composition of  claim 31 , comprising a contact surface comprising at least a portion of an automatic transmission, manual transmission, transaxle, gear, open gear, enclosed gear, and/or tractor.  
     
     
         61 . An automotive gear lubricating composition comprising a blend of components (A) and (B), wherein: component (A) comprises a high viscosity fluid, said high viscosity fluid having (i) a viscosity of greater than or equal to 40 cSt. at 100° C. and less than or equal to 3,000 cSt. at 100° C. and, (ii) a viscosity index greater than or equal to 180; and component (B) comprises a lower viscosity fluid, said lower viscosity fluid having a viscosity of less than or equal to 40 cSt. at 100° C.; wherein the final blend of components (A) and (B) has a viscosity index greater than or equal to 175.  
     
     
         62 . The automotive gear lubricating composition of  claim 61 , wherein the final blend of components (A) and (B) has a viscosity index greater than or equal to 190.  
     
     
         63 . The automotive gear lubricating composition of  claim 61 , wherein the viscosity index of component (A) is greater than or equal to 190.  
     
     
         64 . The automotive gear lubricating composition of  claim 61 , wherein said high viscosity fluid and said lower viscosity fluid comprise base stocks.  
     
     
         65 . The automotive gear lubricating composition of  claim 61 , further comprising an ester.  
     
     
         66 . The automotive gear lubricating composition of  claim 61 , wherein said high viscosity fluid comprises a polyalphaolefin.  
     
     
         67 . The automotive gear lubricating composition of  claim 61 , wherein said high viscosity fluid and said lower viscosity fluid comprise polyalphaolefins.  
     
     
         68 . The automotive gear lubricating composition of  claim 61 , further comprising one or more of an ester, mineral oil and/or hydroprocessed mineral oil.  
     
     
         69 . The automotive gear lubricating composition of  claim 66 , wherein said polyalphaolefin comprises from about 30% to about 60% by weight of the total of said automotive gear lubricating composition.  
     
     
         70 . The automotive gear lubricating composition of  claim 65 , wherein said ester comprises less than or equal to 20% by weight of the total of said automotive gear lubricating composition.  
     
     
         71 . The automotive gear lubricating composition of  claim 68 , wherein said ester, mineral oil and/or hydroprocessed mineral oil comprise less than or equal to 20% by weight of the total of said automotive gear lubricating composition.  
     
     
         72 . The automotive gear lubricating composition of  claim 61 , further comprising one or more of: thickeners, antioxidants, inhibitor packages, and/or anti-rust additives.  
     
     
         73 . The automotive gear lubricating composition of  claim 61 , further comprising one or more of: dispersants, detergents, friction modifiers, traction improving additives, demulsifiers, defoamants, chromophores (dyes), and/or haze inhibitors.  
     
     
         74 . The automotive gear lubricating composition of  claim 72 , further comprising one or more of: dispersants, detergents, friction modifiers, traction improving additives, demulsifiers, defoamants, chromophores (dyes), and/or haze inhibitors.  
     
     
         75 . The automotive gear lubricating composition of  claim 61 , wherein said automotive gear lubricating composition comprises a finished gear oil.  
     
     
         76 . The automotive gear lubricating composition of  claim 61 , further comprising extreme pressure protection and anti-wear additives.  
     
     
         77 . The automotive gear lubricating composition of  claim 61 , comprising an automatic transmission fluid, manual transmission fluid, transaxle lubricant, gear lubricant, open gear lubricant, enclosed gear lubricant, and/or tractor lubricant.  
     
     
         78 . The automotive gear lubricating composition of  claim 61 , comprising a contact surface comprising at least a portion of an automatic transmission, manual transmission, transaxle, gear, open gear, enclosed gear, and/or tractor.  
     
     
         79 . A method of preparing a lubricating composition comprising blending a high viscosity fluid, said high viscosity fluid having a viscosity of greater than or equal to 40 cSt. at 100° C. and less than or equal to 3,000 cSt. at 100° C., with a lower viscosity fluid, said lower viscosity fluid having a viscosity of less than or equal to 40 cSt. at 100° C., wherein the final blend of said high viscosity fluid and said lower viscosity fluid has a viscosity index greater than or equal to 175.  
     
     
         80 . The method of  claim 79 , wherein said high viscosity fluid has a viscosity index of 180 or greater.  
     
     
         81 . The method of  claim 79 , wherein said high viscosity fluid and said lower viscosity fluid comprise base stocks.  
     
     
         82 . The method of  claim 79 , wherein the blend of said high viscosity fluid blended with said lower viscosity fluid comprises a major amount of said lubricating composition.  
     
     
         83 . The method of  claim 79 , further comprising the step of adding an ester.  
     
     
         84 . The method of  claim 79 , wherein said high viscosity fluid comprises a polyalphaolefin.  
     
     
         85 . The method of  claim 79 , wherein said lower viscosity fluid comprises a synthetic hydrocarbon.  
     
     
         86 . The method of  claim 84 , further comprising the step of adding an ester.  
     
     
         87 . The product according to the method of  claim 79 .  
     
     
         88 . An automotive gear lubricating composition comprising: a major amount of a blend of a high viscosity fluid blended with a lower viscosity fluid, said high viscosity fluid having a viscosity of greater than or equal to 40 cSt. at 100° C. and less than or equal to 3,000 cSt. at 100° C., said lower viscosity fluid having a viscosity of less than or equal to 40 cSt. at 100° C., wherein the final blend has a viscosity index greater than or equal to 175.  
     
     
         89 . The method of  claim 88 , wherein said high viscosity fluid and said lower viscosity fluid comprise base stocks.  
     
     
         90 . An automotive gear lubricating composition comprising: a high viscosity fluid, said high viscosity fluid having a viscosity of greater than or equal to 80 cSt. at 100° C. and less than or equal to 300 cSt. at 100° C., blended with a lower viscosity fluid, said lower viscosity fluid having a viscosity of less than or equal to 6 cSt. at 100° C. and greater than or equal to 1.5 cSt. at 100° C., wherein the final blend of said high viscosity fluid and said lower viscosity fluid has a viscosity index greater than or equal to 190.  
     
     
         91 . The method of  claim 90 , wherein said high viscosity fluid and said lower viscosity fluid comprise base stocks.

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