Low sulfur, low ash, and low phosphorus lubricant additive package using an alkylamine salt of dialkylmonothiophosphate

Abstract

The present invention provides an oil soluble lubricant additive package comprising at least one alkylamine salt of a dialkylmonothiophosphate. Further, the present invention provides lubricating oils based on the lubricant additive package and methods of use.

1 . An oil soluble lubricant additive package comprising: 
 at least one alkylamine salt of a dialkylmonothiophosphate; and    at least one detergent, wherein the weight ratio of said alkylamine salt of a dialkylmonothiophosphate to said detergent is from about 0.05:1 to about 3:1.    
     
     
         2 . The oil soluble lubricant additive package as in  claim 1 , wherein said oil soluble lubricant additive package has a sulfur content and a phosphorus content sufficient to yield a lubricating oil having a sulfur content less than about 0.3 wt % and a phosphorus content of less than about 0.11 wt %.  
     
     
         3 . The oil soluble lubricating additive package as in  claim 1 , wherein at least one of said at least one detergent is selected from the group consisting of calcium sulfonate, magnesium sulfonate, sodium sulfonate, non-sulfurized Mannich phenates, sulfurized phenates, salicylates, overbased saligenin, overbased carboxylic acids, and combinations thereof.  
     
     
         4 . A lubricating oil comprising the oil soluble lubricant additive package of  claim 1 , wherein said lubricating oil has a total base number of less than about 10, and at least one property selected from the group consisting of: a sulfur content less than about 0.3 wt %, a phosphorus content of less than about 0.11 wt %, and an ash content less than about 1.2 wt %.  
     
     
         5 . A machine lubricated by the lubricating oil of  claim 4 .  
     
     
         6 . The machine lubricated by the lubricating oil of  claim 5 , wherein said machine is selected from the group consisting of: gas engines, diesel engines, turbine engines, automatic transmissions, manual transmissions, hypoid axles, and gear boxes.  
     
     
         7 . A vehicle comprising the oil soluble lubricant additive package of  claim 1 .  
     
     
         8 . A method for lubricating an engine crankcase, said method comprising the step of: 
 at least partially filling said crankcase with a lubricant comprising the oil soluble lubricant additive package of  claim 1 .    
     
     
         9 . A method for lubricating moving parts of a machine, said method comprising the step of: 
 contacting at least one said moving part with a lubricant comprising the oil soluble lubricant additive package as in  claim 1 .    
     
     
         10 . The method for lubricating moving parts of a machine as in  claim 9 , wherein said machine is selected from the group consisting of: gas engines, diesel engines, turbine engines, automatic transmissions, manual transmissions, hypoid axles, and gear boxes.  
     
     
         11 . An oil soluble lubricant additive package comprising: 
 at least one alkylamine salt of a dialkylmonothiophosphate; and    at least one dispersant, wherein the weight ratio of said alkylamine salt of a dialkylmonothiophosphate to said dispersant is from about 1:4 to about 1:20.    
     
     
         12 . The oil soluble lubricant additive package as in  claim 11 , wherein said oil soluble lubricant additive package has a sulfur content and a phosphorus content sufficient to yield a lubricating oil having a sulfur content less than about 0.3 wt % and a phosphorus content of less than about 0.11 wt %.  
     
     
         13 . The oil soluble lubricant additive package as in  claim 11 , wherein said at least one dispersant has a molecular weight of from about 1,000 to about 20,000.  
     
     
         14 . The oil soluble lubricant additive package as in  claim 11 , wherein said at least one dispersant is a maleic anhydride functionalized polyisobutylene polymer that has been reacted with a polyamine.  
     
     
         15 . The oil soluble lubricant additive package as in  claim 11 , wherein said at least one dispersant is a product of a Mannich reaction.  
     
     
         16 . The oil soluble lubricant additive package as in  claim 11 , wherein said at least one dispersant is an ethylene-propylene type dispersant.  
     
     
         17 . The oil soluble lubricant additive package as in  claim 11 , additionally comprising at least one component selected from the group consisting of: viscosity index improvers and pour point depressants.  
     
     
         18 . A lubricating oil comprising the oil soluble lubricant additive package of  claim 11 , wherein said lubricating oil has a total base number of less than about 10, and at least one property selected from the group consisting of: a sulfur content less than about 0.3 wt %, a phosphorus content of less than about 0.11 wt %, and an ash content less than about 1.2 wt %.  
     
     
         19 . A machine lubricated by the lubricating oil of  claim 11 .  
     
     
         20 . The machine lubricated by the lubricating oil of  claim 19 , wherein said machine is selected from the group consisting of: gas engines, diesel engines, turbine engines, automatic transmissions, manual transmissions, hypoid axles, and gear boxes.  
     
     
         21 . A vehicle comprising the oil soluble lubricant additive package of  claim 11 .  
     
     
         22 . A method for lubricating an engine crankcase, said method comprising the step of: 
 at least partially filling said crankcase with a lubricant comprising the oil soluble lubricant additive package of  claim 11 .    
     
     
         23 . A method for lubricating moving parts of a machine, said method comprising the step of: 
 contacting at least one said moving part with a lubricant comprising the oil soluble lubricant additive package of  claim 11 .    
     
     
         24 . The method for lubricating moving parts of a machine as in  claim 23 , wherein said machine is selected from the group consisting of: gas engines, diesel engines, turbine engines, automatic transmissions, manual transmissions, hypoid axles, and gear boxes.  
     
     
         25 . An oil soluble lubricating additive package comprising: 
 at least one alkylamine salt of a dialkylmonothiophosphate; and    at least one antioxidant, wherein the weight ratio of alkylamine salt of a dialkylmonothiophosphate to antioxidant is from about 10:1 to about 1:5.    
     
     
         26 . The oil soluble lubricant additive package as in  claim 25 , wherein said oil soluble lubricant additive package has a sulfur content and a phosphorus content sufficient to yield a lubricating oil having a sulfur content less than about 0.3 wt % and a phosphorus content of less than about 0.11 wt %.  
     
     
         27 . The oil soluble lubricant additive package as in  claim 25  wherein at least one of said at least one antioxidant is selected from the group consisting of: alkylated diphenylamines, sulfurized olefins, phenols, hindered phenols, and sulfurized phenols.  
     
     
         28 . A lubricating oil comprising the oil soluble lubricant additive package of  claim 25 , wherein said lubricating oil has a total base number of less than about 10, and at least one property selected from the group consisting of: a sulfur content less than about 0.3 wt %, a phosphorus content of less than about 0.11 wt %, and an ash content less than about 1.2 wt %.  
     
     
         29 . A machine lubricated by the lubricating oil of  claim 28 .  
     
     
         30 . The machine of  claim 29 , wherein said machine is selected from the group consisting of: gas engines, diesel engines, turbine engines, automatic transmissions, manual transmissions, hypoid axles, and gear boxes.  
     
     
         31 . A vehicle comprising the oil soluble lubricant additive package of  claim 25 .  
     
     
         32 . A method for lubricating an engine crankcase, said method comprising the step of: 
 at least partially filling said crankcase with a lubricant comprising the oil soluble lubricant additive package of  claim 25 .    
     
     
         33 . A method for lubricating moving parts of a machine, said method comprising the step of: 
 contacting at least one said moving part with a lubricant comprising the oil soluble lubricant additive package as in  claim 25 .    
     
     
         34 . The method of  claim 33 , wherein said machine is selected from the group consisting of: gas engines, diesel engines, turbine engines, automatic transmissions, manual transmissions, hypoid axles, and gear boxes.  
     
     
         35 . An oil soluble lubricant additive package comprising: 
 at least one alkylamine salt of a dialkylmonothiophosphate; and    at least one component selected from the group consisting of: detergents, dispersants, antioxidants, friction modifiers, viscosity index improvers, and pour point depressants.    
     
     
         36 . The oil soluble lubricant additive package as in  claim 35 , wherein said oil soluble lubricant additive package has at least one property selected from the group consisting of: a sulfur content less than about 3 wt % and a phosphorus content less than about 1.2 wt %.  
     
     
         37 . The oil soluble lubricant additive package as in  claim 35  wherein said oil soluble lubricant additive package is essentially free of sulfurized phenate.  
     
     
         38 . A lubricating oil comprising the oil soluble lubricant additive package of  claim 35 , wherein said lubricating oil has a total base number of less than about 10, and at least one property selected from the group consisting of: a sulfur content less than about 0.3 wt %, a phosphorus content of less than about 0.11 wt %, and an ash content less than about 1.2 wt %.  
     
     
         39 . A machine lubricated by the lubricating oil of  claim 38 .  
     
     
         40 . The machine lubricated by the lubricating oil of  claim 38 , wherein said machine is selected from the group consisting of: gas engines, diesel engines, turbine engines, automatic transmissions, manual transmissions, hypoid axles, and gear boxes.  
     
     
         41 . A vehicle comprising the oil soluble lubricating additive package of  claim 35 .  
     
     
         42 . A method for lubricating an engine crankcase, said method comprising the step of: 
 at least partially filling said crankcase with a lubricant comprising the oil soluble lubricant additive package of  claim 35 .    
     
     
         43 . A method for lubricating moving parts of a machine, said method comprising the step of: 
 contacting at least one said moving part with a lubricant comprising the oil soluble lubricant additive package as in  claim 35 .    
     
     
         44 . The method for lubricating moving parts of a machine as in  claim 43 , wherein said machine is selected from the group consisting of: gas engines, diesel engines, turbine engines, automatic transmissions, manual transmissions, hypoid axles, and gear boxes.  
     
     
         45 . A method of achieving a low sulfur, low ash, and low phosphate oil formulation, said method comprising: 
 providing an oil soluble lubricant additive package, said oil soluble lubricant additive package comprising an alkylamine salt of a dialkylmonothiophosphate; and    admixing said oil soluble lubricant additive package with at least a base oil so as to form a lubricating oil having a total base number of less than about 10, and at least one property selected from the group consisting of: a sulfur content less than about 0.3 wt %, a phosphorus content of less than about 0.11 wt %, and an ash content less than about 1.2 wt %.    
     
     
         46 . The method of  claim 45 , wherein said lubricating oil additionally comprises at least one additive selected from the group consisting of: detergents, dispersants, antioxidants, friction modifiers, viscosity index improvers, and pour point depressants.