US2004018946A1PendingUtilityA1

Method of improving the frictional properties of functional fluids

45
Priority: Jul 26, 2002Filed: Jul 26, 2002Published: Jan 29, 2004
Est. expiryJul 26, 2022(expired)· nominal 20-yr term from priority
Inventors:Edward I. AoyagiPaul F. Vartanian
C10N 2030/06C10N 2040/08C10M 129/24C10M 2219/044C10M 2219/046C10N 2040/04C10M 135/10C10N 2010/04C10N 2010/02C10M 2203/1006
45
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Claims

Abstract

A method of improving the brake and clutch capacity of a functional fluid comprising adding a friction-modifying amount of a polyalkenyl sulfonate to the functional fluid, wherein the polyalkenyl sulfonate is an alkali metal or alkaline earth metal salt of a polyalkylene sulfonic acid derived from a mixture of polyalkylenes comprising greater than about 20 mole percent alkyl vinylidene and 1,1-dialkyl isomers.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A method of improving the braking and clutch capacity of a functional fluid, said method comprising adding a friction-modifying amount of a polyalkenyl sulfonate to said functional fluid, said polyalkenyl sulfonate having a TBN of about 0 to about 60 wherein said polyalkenyl sulfonate is an alkali metal or alkaline earth metal salt of a polyalkylene sulfonic acid derived from a mixture of polyalkylenes comprising greater than about 20 mole percent alkyl vinylidene and 1,1-dialkyl isomers.  
     
     
         2 . The method according to  claim 1 , wherein the polyalkenyl sulfonate has a TBN of about 0 to about 30.  
     
     
         3 . The method according to  claim 1 , wherein the mixture of polyalkenes comprises greater than about 50 mole percent alkyl vinylidene and 1,1-dialkyl isomers.  
     
     
         4 . The method according to  claim 1 , wherein the mixture of polyalkenes comprises greater than about 70 mole percent alkyl vinylidene and 1,1-dialkyl isomers.  
     
     
         5 . The method according to  claim 1 ,  2 ,  3 , or  4  wherein the alkyl vinylidene isomer is a methyl vinylidene isomer, and the 1,1-dialkyl isomer is a 1,1-dimethyl isomer.  
     
     
         6 . The method according to  claim 1 , wherein the number average molecular weight of the polyalkene is about 168 to about 5,000.  
     
     
         7 . The method according to  claim 1 , wherein the number average molecular weight of the polyalkene is about 350 to about 2,300.  
     
     
         8 . The method according to  claim 1 , wherein the number average molecular weight of the polyalkene is about 350 to about 1,000.  
     
     
         9 . The method according to  claim 1 , wherein the number average molecular weight of the polyalkene is about 350 to about 750.  
     
     
         10 . The method according to  claim 1 , wherein the polyalkene is polyisobutene.  
     
     
         11 . The method according to  claim 10 , wherein the polyisobutene is made using a BF 3  catalyst.  
     
     
         12 . The method according to  claim 1 , wherein the polyalkene is polyisobutene and the molecular weight distribution of the polyisobutenyl sulfonic acids has at least about 80% of the polyisobutenyl sulfonic acids molecular weights separated by even multiples of about 56 daltons.  
     
     
         13 . The method according to  claim 1 , wherein the polyalkene is polyisobutene and less than about 20% of the polyisobutenyl sulfonic acids in the molecular weight distribution of the polyisobutenyl sulfonic acids contain a total number of carbon atoms that is not evenly divisible by about four.  
     
     
         14 . The method according to  claim 1 , wherein the functional fluid is an automatic transmission fluid or hydraulic fluid.  
     
     
         15 . The method according to  claim 14 , wherein the functional fluid is a hydraulic fluid.  
     
     
         16 . The method according to  claim 15 , wherein the hydraulic fluid is a tractor hydraulic fluid.  
     
     
         17 . A method of improving the braking and clutch capacity of a functional fluid, said method comprising adding a friction-modifying amount of a polyalkenyl sulfonate to said functional fluid, said polyalkenyl sulfonate having a TBN of greater than about 60 to about 400 wherein said polyalkenyl sulfonate is an alkali metal or alkaline earth metal salt of a polyalkylene sulfonic acid derived from a mixture of polyalkylenes comprising greater than about 20 mole percent alkyl vinylidene and 1,1-dialkyl isomers.  
     
     
         18 . The method according to  claim 1 , wherein the polyalkenyl sulfonate has a TBN of about 250 to about 350.  
     
     
         19 . The method according to  claim 18 , wherein the mixture of polyalkenes comprises greater than about 50 mole percent alkyl vinylidene and 1,1-dialkyl isomers.  
     
     
         20 . The method according to  claim 16 , wherein the mixture of polyalkenes comprises greater than about 70 mole percent alkyl vinylidene and 1,1 -dialkyl isomers.  
     
     
         21 . The method according to  claim 16 ,  17 ,  18 , or  19  wherein the alkyl vinylidene isomer is a methyl vinylidene isomer, and the 1,1-dialkyl isomer is a 1,1-dimethyl isomer.  
     
     
         22 . The method according to  claim 16 , wherein the number average molecular weight of the polyalkene is about 168 to about 5,000.  
     
     
         23 . The method according to  claim 16 , wherein the number average molecular weight of the polyalkene is about 350 to about 2,300.  
     
     
         24 . The method according to  claim 16 , wherein the number average molecular weight of the polyalkene is about 350 to about 1,000.  
     
     
         25 . The method according to  claim 16 , wherein the number average molecular weight of the polyalkene is about 350 to about 750.  
     
     
         26 . The method according to  claim 16 , wherein the polyalkene is polyisobutene.  
     
     
         27 . The method according to  claim 26 , wherein the polyisobutene is made using a BF 3  catalyst.  
     
     
         28 . The method according to  claim 16 , wherein the polyalkene is polyisobutene and the molecular weight distribution of the polyisobutenyl sulfonic acids has at least about 80% of the polyisobutenyl sulfonic acids molecular weights separated by even multiples of about 56 daltons.  
     
     
         29 . The method according to  claim 16 , wherein the polyalkene is polyisobutene and less than about 20% of the polyisobutenyl sulfonic acids in the molecular weight distribution of the polyisobutenyl sulfonic acids contain a total number of carbon atoms that is not evenly divisible by about four.  
     
     
         30 . The method according to  claim 16 , wherein the functional fluid is a tractor hydraulic fluid or an automatic transmission fluid.  
     
     
         31 . The method according to  claim 30 , wherein the functional fluid is a tractor hydraulic fluid.

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