Lubricating Composition

Abstract

There is disclosed 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; (ii) a nitrogen-containing compound represented by the formula (I): 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 atoms, hydrogen, halogen, hydroxy, hydrocarbyl, substituted hydrocarbyl, amino, amido, phosphoro, and sulfono; and (iii) a phenolic compound.

1 . An additive composition comprising:
 (i) a triazole compound substituted with an aryl moiety;   (ii) a nitrogen-containing compound represented by the formula (I):   
       
         
           
           
               
               
           
         
         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 atoms, hydrogen, halogen, hydroxy, hydrocarbyl, substituted hydrocarbyl, amino, amido, phosphoro, and sulfono; and 
         (iii) a phenolic compound. 
       
     
     
         2 . The additive composition of  claim 1 , wherein the triazole compound is substituted with a substituted aryl moiety comprising multiple rings. 
     
     
         3 . The additive composition of  claim 1 , wherein the triazole compound is substituted with a substituted aryl moiety comprising a single ring. 
     
     
         4 . The additive composition of  claim 1 , wherein the triazole compound is represented by the formula (II): 
       
         
           
           
               
               
           
         
         wherein R 3  is selected from the group consisting of hydrogen and an alkyl moiety comprising from about 1 to about 24 carbon atoms, and wherein R 4  is selected from the group consisting of hydrogen, an alkyl moiety comprising from about 1 to about 24 carbon atoms, and a substituted hydrocarbyl moiety. 
       
     
     
         5 . The additive composition of  claim 1 , wherein the triazole compound is not an alkyl bis-3-amino-1,2,4-triazole. 
     
     
         6 . The additive composition of  claim 1 , wherein the phenolic compound comprises an esterified reaction product of 2,6-di-tert-butyl phenol and an unsaturated carboxylic acid comprising at least one double bond and from about 3 to about 24 carbon atoms. 
     
     
         7 . The additive composition of  claim 1 , wherein the phenolic compound is represented by the formula (III): 
       
         
           
           
               
               
           
         
         wherein R 5  and R 6  are each independently selected from the group consisting of hydrogen, an alkyl moiety comprising from about 1 to about 24 carbon atoms, and a cyclic moiety comprising from about 3 to about 12 carbon atoms, and R 7  is selected from the group consisting of hydrogen, alkyl, aryl, alkaryl, and (CH 2 ) n COOR 8 , wherein n is an integer from 1 to 4, inclusive and R 8  is an alkyl moiety comprising from about 1 to about 18 carbon atoms. 
       
     
     
         8 . The additive composition of  claim 1 , wherein the phenolic compound is 3,5-di-tert-butyl-4-hydroxy phenol propionate. 
     
     
         9 . The additive composition of  claim 1 , wherein the triazole compound is present in an amount ranging from about 0.48 wt. % to about 5 wt. %. 
     
     
         10 . The additive composition of  claim 1 , wherein the nitrogen-containing compound is present in an amount ranging from about 2 wt. % to about 12 wt. %. 
     
     
         11 . The additive composition of  claim 1 , wherein the phenolic compound is present in an amount ranging from about 0.5 wt. % to about 12 wt. %. 
     
     
         12 . The additive composition of  claim 1 , further comprising at least one additive selected from the group consisting of phosphorus-containing compounds, 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, and boron-containing complexes. 
     
     
         13 . 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; 
 (ii) a nitrogen-containing compound represented by the formula (I): 
   
       
         
           
           
               
               
           
         
         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 atoms, hydrogen, halogen, hydroxy, hydrocarbyl, substituted hydrocarbyl, amino, amido, phosphoro, and sulfono; and
 (iii) a phenolic compound. 
 
       
     
     
         14 . The lubricant composition of  claim 13 , wherein the triazole compound is present in an amount ranging from about 0.05 wt. % to about 0.5 wt. %. 
     
     
         15 . The lubricant composition of  claim 13 , wherein the triazole compound is present in an amount ranging from about 0.1 wt. % to about 0.3 wt. %. 
     
     
         16 . The lubricant composition of  claim 13 , wherein the nitrogen-containing compound is present in an amount ranging from about 0.2 wt. % to about 1.2 wt. %. 
     
     
         17 . The lubricant composition of  claim 13 , wherein the nitrogen-containing compound is present in an amount ranging from about 0.4 wt. % to about 1.0 wt. %. 
     
     
         18 . The lubricant composition of  claim 13 , wherein the phenolic compound is present in an amount ranging from about 0.05 wt. % to about 1.2 wt. %. 
     
     
         19 . The lubricant composition of  claim 13 , wherein the phenolic compound is present in an amount ranging from about 0.1 wt. % to about 12 wt. %. 
     
     
         20 . The lubricant composition of  claim 13 , further comprising at least one additive selected from the group consisting of phosphorus-containing compounds, 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, and boron-containing complexes. 
     
     
         21 . The lubricant composition of  claim 13 , further comprising at least one titanium-containing compound. 
     
     
         22 . The lubricant composition of  claim 13 , further comprising a phosphorus-containing compound in an amount ranging from about 100 to about 1000 ppm of total phosphorus in a lubricant composition. 
     
     
         23 . The lubricant composition of  claim 22 , wherein the phosphorus-containing compound is in a concentration ranging from about 600 to about 800 ppm of total phosphorus in the lubricant composition. 
     
     
         24 . The lubricant composition of  claim 13 , wherein the lubricant composition is selected from the group consisting of passenger car motor oil, medium speed diesel engine oil, and heavy duty diesel engine oil. 
     
     
         25 . A method of delaying the onset of viscosity increase in 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; 
 (ii) a nitrogen-containing compound represented by the formula (I): 
   
       
         
           
           
               
               
           
         
         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 atoms, hydrogen, halogen, hydroxy, hydrocarbyl, substituted hydrocarbyl, amino, amido, phosphoro, and sulfono; and
 (iii) a phenolic compound. 
 
       
     
     
         26 . The method of  claim 25 , wherein the machine is selected from the group consisting of spark ignition and compression-ignition internal combustion engines. 
     
     
         27 . 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 an additive composition comprising:
 (i) a triazole compound substituted with an aryl moiety; 
 (ii) a nitrogen-containing compound represented by the formula (I): 
   
       
         
           
           
               
               
           
         
         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 atoms, hydrogen, halogen, hydroxy, hydrocarbyl, substituted hydrocarbyl, amino, amido, phosphoro, and sulfono; and
 (iii) a phenolic compound. 
 
       
     
     
         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 . A method of 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; 
 (ii) a nitrogen-containing compound represented by the formula (I): 
   
       
         
           
           
               
               
           
         
         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 atoms, hydrogen, halogen, hydroxy, hydrocarbyl, substituted hydrocarbyl, amino, amido, phosphoro, and sulfono; and
 (iii) a phenolic compound. 
 
       
     
     
         30 . The method of  claim 29 , wherein the machine is selected from the group consisting of spark ignition and compression-ignition internal combustion engines.