Lubricating composition

Abstract

There is disclosed a lubricant composition comprising a major amount of a base oil; and a minor amount of a synergistic additive composition comprising: (i) a triazole compound substituted with an aryl moiety, with the proviso that the triazole compound is not an alkyl bis-3-amino-1,2,4-triazole; and (ii) a nitrogen-containing compound represented by the formula: wherein R 1 and R 2 are each independently selected from the group consisting of at least one aryl moiety comprising from about 6 to about 30 carbon atoms, hydrogen, halogen, hydroxy, hydrocarbyl, substituted hydrocarbyl, amino, amido, phosphoro, and sulfono.

1 . A synergistic additive composition comprising:
 (i) a triazole compound substituted with an aryl moiety, with the proviso that the triazole compound is not an alkyl bis-3-amino-1,2,4-triazole; and   (ii) a nitrogen-containing compound represented by the formula (II):   
       
         
           
           
               
               
           
         
         wherein R 1  and R 2  are each independently selected from the group consisting of at least one aryl moiety comprising from about 6 to about 30 carbon atoms, hydrogen, halogen, hydroxy, hydrocarbyl, substituted hydrocarbyl, amino, amido, phosphoro, and sulfono. 
       
     
     
         2 . The synergistic additive composition of  claim 1 , wherein R 1  and R 2  are each an aryl moiety comprising from about 6 to about 30 carbon atoms. 
     
     
         3 . The synergistic additive composition of  claim 1 , wherein the aryl moiety is selected from the group consisting of phenyl, benzyl, naphthyl, and alkaryl. 
     
     
         4 . The synergistic additive composition of  claim 3 , wherein the alkaryl is selected from the group consisting of alkphenyl and alknaphthyl, wherein the alkyl moiety comprises from about 4 to about 30 carbon atoms. 
     
     
         5 . The synergistic additive composition of  claim 4 , wherein the alkyl moiety of the alkaryl comprises from about 4 to about 12 carbon atoms. 
     
     
         6 . The synergistic additive composition of  claim 1 , wherein the triazole compound is substituted with a substituted or unsubstituted aryl moiety comprising multiple rings. 
     
     
         7 . The synergistic additive composition of  claim 1 , wherein the triazole compound is substituted with a substituted or unsubstituted aryl moiety comprising a single ring. 
     
     
         8 . The synergistic additive composition of  claim 1 , wherein the triazole compound is represented by the formula (I): 
       
         
           
           
               
               
           
         
         wherein R 3  is selected from the group consisting of hydrogen and at least one alkyl moiety comprising from about 1 to about 24 carbon atoms, and wherein R 4  is selected from the group consisting of hydrogen, at least one alkyl moiety comprising from about 1 to about 24 carbon atoms, and a substituted hydrocarbyl moiety. 
       
     
     
         9 . The synergistic additive composition of  claim 1 , wherein the triazole compound is a benzotriazole. 
     
     
         10 . The synergistic additive composition of  claim 1 , wherein the triazole compound is present in an amount ranging from about 0.01 wt. % to about 3 wt. %, relative to the total weight of the additive composition. 
     
     
         11 . The synergistic additive composition of  claim 1 , wherein the nitrogen-containing compound is present in an amount ranging from about 0.07 wt. % to about 33 wt. %, relative to the total weight of the additive composition. 
     
     
         12 . The synergistic additive composition of  claim 1 , further comprising at least one additive selected from the group consisting of dispersants, ash-containing detergents, ashless-detergents, overbased detergents, pour point depressing agents, viscosity index improving agents, ash-containing friction modifier, ashless friction modifier, nitrogen-containing friction modifier, nitrogen-free friction modifier, esterified friction modifier, extreme pressure agents, rust inhibitors, supplemental antioxidants, corrosion inhibitors, anti-foam agents, titanium compounds, titanium complexes, organic soluble molybdenum compounds, organic soluble molybdenum complexes, boron-containing compounds, boron-containing complexes, tungsten-containing compounds, and tungsten-containing complexes. 
     
     
         13 . The synergistic additive composition of  claim 1 , further comprising at least one molybdenum compound 
     
     
         14 . The synergistic additive composition of  claim 1 , further comprising at least one titanium compound. 
     
     
         15 . A lubricant composition comprising:
 a major amount of a base oil; and   a minor amount of a synergistic additive composition comprising:   (i) a triazole compound substituted with an aryl moiety, with the proviso that the triazole compound is not an alkyl bis-3-amino-1,2,4-triazole; and   (ii) a nitrogen-containing compound represented by the formula (II):   
       
         
           
           
               
               
           
         
         wherein R 1  and R 2  are each independently selected from the group consisting of at least one aryl moiety comprising from about 6 to about 30 carbon atoms, hydrogen, halogen, hydroxy, hydrocarbyl, substituted hydrocarbyl, amino, amido, phosphoro, and sulfono. 
       
     
     
         16 . The lubricant composition of  claim 15 , wherein the lubricant composition is essentially free of compounds containing boron or phosphorus. 
     
     
         17 . The lubricant composition of  claim 15 , wherein the lubricant composition is essentially free of zinc dialkyldithiophosphate. 
     
     
         18 . The lubricant composition of  claim 15 , wherein the triazole compound is present in an amount ranging from about 0.05 wt. % to about 0.5 wt. %, relative to the total weight of the composition. 
     
     
         19 . The lubricant composition of  claim 15 , wherein the nitrogen-containing compound is present in an amount ranging from about 0.01 wt. % to about 10 wt. %, relative to the total weight of the composition. 
     
     
         20 . The lubricant composition of  claim 15 , wherein the nitrogen-containing compound is present in an amount ranging from about 0.3 wt. % to about 3 wt. %, relative to the total weight of the composition. 
     
     
         21 . The lubricant composition of  claim 15 , wherein the triazole compound is present at 0.05 wt. % and the nitrogen-containing compound is present at 0.3 wt. %, relative to the total weight of the composition. 
     
     
         22 . The lubricant composition of  claim 15 , further comprising at least one additive selected from the group consisting of dispersants, ash-containing detergents, ashless-detergents, overbased detergents, pour point depressing agents, viscosity index improving agents, ash-containing friction modifier, ashless friction modifier, nitrogen-containing friction modifier, nitrogen-free friction modifier, esterified friction modifier, extreme pressure agents, rust inhibitors, supplemental antioxidants, corrosion inhibitors, anti-foam agents, titanium compounds, titanium complexes, organic soluble molybdenum compounds, organic soluble molybdenum complexes, boron-containing compounds, boron-containing complexes, tungsten-containing compounds, and tungsten-containing complexes. 
     
     
         23 . The lubricant composition of  claim 15 , wherein the lubricant composition is selected from the group consisting of medium speed diesel engine oils, passenger car motor oils, and heavy duty diesel engine oils. 
     
     
         24 . The lubricant composition of  claim 15 , further comprising at least one molybdenum compound 
     
     
         25 . The lubricant composition of  claim 15 , further comprising at least one titanium compound. 
     
     
         26 . A lubricant composition comprising:
 a major amount of a base oil; and   a minor amount of an additive composition comprising:   (i) a triazole compound substituted with an aryl moiety, with the proviso that the triazole compound is not an alkyl bis-3-amino-1,2,4-triazole; and   (ii) a nitrogen-containing compound represented by the formula (II):   
       
         
           
           
               
               
           
         
         wherein R 1  and R 2  are each independently selected from the group consisting of at least one aryl moiety comprising from about 6 to about 30 carbon atoms, hydrogen, halogen, hydroxy, hydrocarbyl, substituted hydrocarbyl, amino, amido, phosphoro, and sulfono. 
       
     
     
         27 . A method of improving oxidation protection of a lubricant composition, said method comprising:
 providing to a machine a lubricant composition comprising a major amount of a base oil; and a minor amount of an additive composition comprising:
 (i) a triazole compound substituted with an aryl moiety, with the proviso that the triazole compound is not an alkyl bis-3-amino-1,2,4-triazole; and 
 (ii) a nitrogen-containing compound represented by the formula (II): 
   
       
         
           
           
               
               
           
         
         wherein R 1  and R 2  are each independently selected from the group consisting of at least one aryl moiety comprising from about 6 to about 30 carbon atoms, hydrogen, halogen, hydroxy, hydrocarbyl, substituted hydrocarbyl, amino, amide, phosphoro, and sulfono. 
       
     
     
         28 . The method of  claim 27 , wherein the machine is selected from the group consisting of spark ignition and compression-ignition internal combustion engines. 
     
     
         29 . The method of  claim 28 , wherein the engine is selected from the group consisting of diesel engines, marine engines, rotary engines, turbine engines, locomotive engines, propulsion engines, aviation piston engines, stationary power generation engines, continuous power generation engines, and engines comprising silver parts. 
     
     
         30 . A method for operating a machine comprising:
 adding to the machine a lubricating composition comprising a major amount of a base oil; and a minor amount of an additive composition comprising:
 (i) a triazole compound substituted with an aryl moiety, with the proviso that the triazole compound is not an alkyl bis-3-amino-1,2,4-triazole; and 
 (ii) a nitrogen-containing compound represented by the formula (II): 
   
       
         
           
           
               
               
           
         
         wherein R 1  and R 2  are each independently selected from the group consisting of at least one aryl moiety comprising from about 6 to about 30 carbon atoms, hydrogen, halogen, hydroxy, hydrocarbyl, substituted hydrocarbyl, amino, amido, phosphoro, and sulfono. 
       
     
     
         31 . The method of  claim 30 , wherein the machine is selected from the group consisting of spark ignition and compression-ignition internal combustion engines. 
     
     
         32 . The method of  claim 31 , wherein the engine is selected from the group consisting of diesel engines, marine engines, rotary engines, turbine engines, locomotive engines, propulsion engines, aviation piston engines, stationary power generation engines, continuous power generation engines, and engines comprising silver parts. 
     
     
         33 . A method of lubricating at least one moving part of a machine, said method comprising:
 contacting the at least one moving part with a lubricant composition comprising a major amount of a base oil; and a minor amount of a synergistic additive composition comprising:
 (i) a triazole compound substituted with an aryl moiety, with the proviso that the triazole compound is not an alkyl bis-3-amino-1,2,4-triazole; and 
 (ii) a nitrogen-containing compound represented by the formula (II): 
   
       
         
           
           
               
               
           
         
         wherein R 1  and R 2  are each independently selected from the group consisting of at least one aryl moiety comprising from about 6 to about 30 carbon atoms, hydrogen, halogen, hydroxy, hydrocarbyl, substituted hydrocarbyl, amino, amido, phosphoro, and sulfono. 
       
     
     
         34 . The method of  claim 33 , wherein the machine is selected from the group consisting of spark ignition and compression-ignition internal combustion engines 
     
     
         35 . The method of  claim 34 , wherein the at least one moving part is selected from the group consisting of gears, pistons, bearings, rods, springs, camshafts, crankshafts, and rotors.