US2010286004A1PendingUtilityA1

Lubricant oil additive compositions

40
Assignee: ALBEMARLE CORPPriority: Mar 29, 2006Filed: Mar 28, 2007Published: Nov 11, 2010
Est. expiryMar 29, 2026(expired)· nominal 20-yr term from priority
Inventors:Vincent J. GattoEmily R. SchnellerWilliam E. Moehle
C10N 2030/10C10N 2060/14C10M 2219/068C10N 2040/255C10N 2040/252C10N 2010/12C10N 2040/25C10M 2207/026C10M 141/12C10M 2215/064C10M 2227/061
40
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Claims

Abstract

A lubricant oil composition having a synergistic oxidative stability is disclosed, the composition comprising at least one hindered phenolic antioxidant, at least one mono-boronated hindered phenolic antioxidant, at least one di-boronated hindered phenolic antioxidant, at least one alkylated diphenylamine and at least one organomolybdenum compound. The invention also provides a lubricating oil additive concentrate composition that imparts synergistic oxidative stability to a lubricant oil upon its addition, the concentrate composition comprising at least one hindered phenolic antioxidant, at least one mono-boronated hindered phenolic antioxidant, at least one di-boronated hindered phenolic antioxidant, at least one alkylated diphenylamine and at least one organomolybdenum compound. Further, the concentrate compositions of the present invention may also be prepared with a high concentration of hindered phenolic antioxidants without deleterious effects on viscosity or lubricant solubility.

Claims

exact text as granted — not AI-modified
1 . A lubricant oil composition comprising at least one hindered phenolic antioxidant, at least one boronated hindered phenolic antioxidant, at least one alkylated diphenylamine, and at least one organomolybdenum compound. 
     
     
         2 . The lubricant oil composition of  claim 1 , wherein the at least one boronated hindered phenolic antioxidant is derived from the at least one hindered phenolic antioxidant. 
     
     
         3 . The lubricant oil composition of  claim 2 , wherein the at least one boronated hindered phenolic antioxidant comprises mono- and di-boronated hindered phenolic antioxidants. 
     
     
         4 . The lubricant oil composition of  claim 3 , wherein the hindered phenolic antioxidant is 4,4′-methylenebis(2,6-di-tert-butylphenol). 
     
     
         5 . The lubricant oil composition of  claim 4 , wherein the mono-boronated hindered phenolic antioxidant has the structure 
       
         
           
           
               
               
           
         
       
       and the di-boronated hindered phenolic antioxidant has the structure 
       
         
           
           
               
               
           
         
       
       wherein R 1 , R 2 , R 3 , and R 4  are independently selected from the group consisting of linear C 1  to C 8  alkyl groups, branched C 1  to C 8  alkyl groups and cyclic C 3  to C 8  alkyl groups. 
     
     
         6 . The lubricant oil composition of  claim 5 , wherein the at least one alkylated diphenylamine comprises mono- and di-alkylated diphenylamine. 
     
     
         7 . The lubricant oil composition of  claim 6 , wherein the mono-alkylated diphenylamine has the structure 
       
         
           
           
               
               
           
         
       
       and the di-alkylated diphenylamine has the structure 
       
         
           
           
               
               
           
         
       
       wherein R 1 , R 2  and R 3  are independently selected from the group consisting of linear, branched and cyclic C 4  to C 32  alkyl groups. 
     
     
         8 . The lubricant oil composition of  claim 7 , wherein the mono- and di-alkylated diphenylamine is selected from the group consisting of nonylated diphenylamines, octylated diphenylamines, mixed octylated/styrenated diphenylamines, and mixed butylated/octylated diphenyl amines. 
     
     
         9 . The lubricant oil composition of  claim 3 , wherein the organomolybdenum compound is selected from the group consisting of sulfur-free organomolybdenum compounds, phosphorus-free organomolybdenum compounds, and sulfur-containing organomolybdenum compounds. 
     
     
         10 . The lubricant oil composition of  claim 9 , wherein the organomolybdenum compound is a molybdenum dithiocarbamate having the structure 
       
         
           
           
               
               
           
         
       
       wherein R is independently selected from hydrogen or an alkyl group containing 4 to 18 carbons, and X is independently selected from oxygen or sulfur. 
     
     
         11 . The lubricant oil composition of  claim 10 , wherein the concentration of the organomolybdenum compound ranges from about 1 wt % to about 40 wt % of the total concentration of hindered phenolic, boronated hindered phenolic, alkylated diphenylamine and organomolybdenum compound. 
     
     
         12 . The lubricant oil composition of  claim 11 , wherein the weight ratio of molybdenum to boron ranges from about 0.01:1 to about 10:1. 
     
     
         13 . The lubricant oil composition of  claim 12 , wherein the molybdenum content ranges from between about 50 ppm to about 1000 ppm and the boron content ranges between about 50 ppm to about 500 ppm. 
     
     
         14 . The lubricant oil composition of  claim 13 , wherein the molybdenum content ranges from between about 100 ppm to about 400 ppm and the boron content ranges between about 100 ppm to about 400 ppm. 
     
     
         15 . The lubricant oil composition of  claim 4 , wherein the concentration of 4,4′-methylenebis(2,6-di-tert-butylphenol) is between about 1 to about 50 weight percent of the total concentration of hindered phenolic, boronated hindered phenolic, alkylated diphenylamine and organomolybdenum compound. 
     
     
         16 . The lubricant oil composition of  claim 15 , wherein the concentration of mono- and di-boronated hindered phenolic is between about 10 to about 80 weight percent of the total concentration of hindered phenolic, boronated hindered phenolic, alkylated diphenylamine and organomolybdenum compound. 
     
     
         17 . The lubricant oil composition of  claim 16 , wherein the ratio of mono-boronated hindered phenolic to di-boronated hindered phenolic is between about 1:1 to about 1:0.01. 
     
     
         18 . The lubricant oil composition of  claim 17 , wherein the concentration of alkylated diphenylamine is between about 10 to about 80 weight percent of the total concentration of hindered phenolic, boronated hindered phenolic, alkylated diphenylamine, and organomolybdenum compound. 
     
     
         19 . A lubricating oil additive concentrate composition comprising at least one hindered phenolic antioxidant, at least one boronated hindered phenolic antioxidant, at least one alkylated diphenylamine, and at least one organomolybdenum compound. 
     
     
         20 . The lubricating oil additive concentrate composition of  claim 19 , wherein the at least one boronated hindered phenolic antioxidant is derived from the at least one hindered phenolic antioxidant. 
     
     
         21 . The lubricating oil additive concentrate composition of  claim 20 , wherein the at least one boronated hindered phenolic antioxidant comprises mono- and di-boronated hindered phenolic antioxidants. 
     
     
         22 . The lubricating oil additive concentrate composition of  claim 21 , wherein the hindered phenolic antioxidant is 4,4′-methylenebis(2,6-di-tert-butylphenol). 
     
     
         23 . The lubricating oil additive concentrate composition of  claim 22 , wherein the mono-boronated hindered phenolic antioxidant has the structure 
       
         
           
           
               
               
           
         
       
       and the di-boronated hindered phenolic antioxidant has the structure 
       
         
           
           
               
               
           
         
       
       wherein R 1 , R 2 , R 3 , and R 4  are independently selected from the group consisting of linear C 1  to C 8  alkyl groups, branched C 1  to C 8  alkyl groups and cyclic C 3  to C 8  alkyl groups. 
     
     
         24 . The lubricating oil additive concentrate composition of  claim 23 , wherein the at least one alkylated diphenylamine comprises mono- and di-alkylated diphenylamine. 
     
     
         25 . The lubricating oil additive concentrate composition of  claim 24 , wherein the mono-alkylated diphenylamine has the structure 
       
         
           
           
               
               
           
         
       
       and the di-alkylated diphenylamine has the structure 
       
         
           
           
               
               
           
         
       
       wherein R 1 , R 2  and R 3  are independently selected from the group consisting of linear, branched and cyclic C 4  to C 32  alkyl groups. 
     
     
         26 . The lubricating oil additive concentrate composition of  claim 25 , wherein the mono- and di-alkylated diphenylamine is selected from the group consisting of nonylated diphenylamines, octylated diphenylamines, mixed octylated/styrenated diphenylamines, and mixed butylated/octylated diphenylamines. 
     
     
         27 . The lubricant oil composition of  claim 21 , wherein the organomolybdenum compound is selected from the group consisting of sulfur-free organomolybdenum compounds, phosphorus-free organomolybdenum compounds, and sulfur-containing organomolybdenum compounds. 
     
     
         28 . The lubricant oil composition of  claim 27 , wherein the organomolybdenum compound is a molybdenum dithiocarbamate having the structure 
       
         
           
           
               
               
           
         
       
       wherein R is independently selected from hydrogen or an alkyl group containing 4 to 18 carbons, and X is independently selected from oxygen or sulfur. 
     
     
         29 . The lubricant oil composition of  claim 28 , wherein the concentration of the organomolybdenum compound ranges from about 1 wt % to about 40 wt % of the total concentration of hindered phenolic, boronated hindered phenolic, alkylated diphenylamine and organomolybdenum compound. 
     
     
         30 . The lubricating oil additive concentrate composition of  claim 22 , wherein the concentration of 4,4′-methylenebis(2,6-di-tert-butylphenol) is between about 1 to about 50 weight percent of the total concentration of hindered phenolic, boronated hindered phenolic, alkylated diphenylamine and organomolybdenum compound. 
     
     
         31 . The lubricating oil additive concentrate composition of  claim 30 , wherein the concentration of mono- and di-boronated hindered phenolic is between about 10 to about 80 weight percent of the total concentration of hindered phenolic, boronated hindered phenolic, alkylated diphenylamine and organomolybdenum compound. 
     
     
         32 . The lubricating oil additive concentrate composition of  claim 31 , wherein the ratio of mono-boronated hindered phenolic to di-boronated hindered phenolic is between about 1:1 to about 1:0.01. 
     
     
         33 . The lubricating oil additive concentrate composition of  claim 32 , wherein the concentration of alkylated diphenylamine is between about 10 to about 80 weight percent of the total concentration of hindered phenolic, boronated hindered phenolic, alkylated diphenylamine and organomolybdenum compound. 
     
     
         34 . The lubricating oil additive concentrate composition of  claim 33 , further comprising a diluent oil. 
     
     
         35 . The lubricating oil additive concentrate composition of  claim 34 , wherein the concentration of the diluent oil is between about 1 to about 80 wt %. 
     
     
         36 . An engine oil composition comprising at least one hindered phenolic antioxidant, at least one boronated hindered phenolic antioxidant, at least one alkylated diphenylamine and at least one organomolybdenum compound. 
     
     
         37 . The engine oil composition of  claim 36 , wherein the hindered phenolic antioxidant is 4,4′-methylenebis(2,6-di-tert-butylphenol). 
     
     
         38 . The engine oil composition of  claim 37 , wherein the at least one boronated hindered phenolic antioxidant comprises a mono-boronated hindered phenolic antioxidant having the structure 
       
         
           
           
               
               
           
         
       
       and a di-boronated hindered phenolic antioxidant having the structure 
       
         
           
           
               
               
           
         
       
       wherein R 1 , R 2 , R 3 , and R 4  are independently selected from the group consisting of linear C 1  to C 8  alkyl groups, branched C 1  to C 8  alkyl groups and cyclic C 3  to C 8  alkyl groups. 
     
     
         39 . The engine oil composition of  claim 38 , wherein the at least one alkylated diphenylamine comprises a mono-alkylated diphenylamine having the structure 
       
         
           
           
               
               
           
         
       
       and a di-alkylated diphenylamine having the structure 
       
         
           
           
               
               
           
         
       
       wherein R 1 , R 2  and R 3  are independently selected from the group consisting of linear, branched and cyclic C 4  to C 32  alkyl groups. 
     
     
         40 . The engine oil composition of  claim 39 , wherein the mono- and di-alkylated diphenylamine is selected from the group consisting of nonylated diphenylamines, octylated diphenylamines, mixed octylated/styrenated diphenylamines, and mixed butylated/octylated diphenylamines. 
     
     
         41 . The engine oil composition of  claim 40 , wherein the organomolybdenum compound is a molybdenum dithiocarbamate having the structure 
       
         
           
           
               
               
           
         
       
       wherein R is independently selected from hydrogen or an alkyl group containing 4 to 18 carbons, and X is independently selected from oxygen or sulfur. 
     
     
         42 . The engine oil composition of  claim 41 , wherein the concentration of 4,4′-methylenebis(2,6-di-tert-butylphenol) is between about 1 to about 50 weight percent of the total concentration of hindered phenolic, boronated hindered phenolic, alkylated diphenylamine and organomolybdenum compound, the concentration of mono- and di-boronated hindered phenolic is between about 10 to about 80 weight percent of the total concentration of hindered phenolic, boronated hindered phenolic, alkylated diphenylamine and organomolybdenum compound, the ratio of mono-boronated hindered phenolic to di-boronated hindered phenolic is between about 1:1 to about 1:0.01, the concentration of alkylated diphenylamine is between about 10 to about 80 weight percent of the total concentration of hindered phenolic, boronated hindered phenolic, alkylated diphenylamine and organomolybdenum compound, and the concentration of organomolybdenum compound is between about 1 to about 40 weight percent of the total concentration of hindered phenolic, boronated hindered phenolic, alkylated diphenylamine and organomolybdenum compound. 
     
     
         43 . The engine oil composition of  claim 42 , wherein the engine oil is used to lubricate an engine selected from the group consisting of a gasoline engine, a heavy duty diesel engine, a natural gas engine, a marine engine and a railroad engine. 
     
     
         44 . An engine oil additive concentrate composition comprising at least one hindered phenolic antioxidant, at least one boronated hindered phenolic antioxidant, at least one alkylated diphenylamine and at least one organomolybdenum compound. 
     
     
         45 . The engine oil additive concentrate composition of  claim 44 , wherein the hindered phenolic antioxidant is 4,4′-methylenebis(2,6-di-tert-butylphenol). 
     
     
         46 . The engine oil additive concentrate composition of  claim 45 , wherein the at least one boronated hindered phenolic antioxidant comprises a mono-boronated hindered phenolic antioxidant having the structure 
       
         
           
           
               
               
           
         
       
       and a di-boronated hindered phenolic antioxidant having the structure 
       
         
           
           
               
               
           
         
       
       wherein R 1 , R 2 , R 3 , and R 4  are independently selected from the group consisting of linear C 1  to C 8  alkyl groups, branched C 1  to C 8  alkyl groups and cyclic C 3  to C 8  alkyl groups. 
     
     
         47 . The engine oil additive concentrate composition of  claim 46 , wherein the at least one alkylated diphenylamine comprises a mono-alkylated diphenylamine having the structure 
       
         
           
           
               
               
           
         
       
       and a di-alkylated diphenylamine having the structure 
       
         
           
           
               
               
           
         
       
       wherein R 1 , R 2  and R 3  are independently selected from the group consisting of linear, branched and cyclic C 4  to C 32  alkyl groups. 
     
     
         48 . The engine oil additive concentrate composition of  claim 47 , wherein the mono- and di-alkylated diphenylamine is selected from the group consisting of nonylated diphenylamines, octylated diphenylamines, mixed octylated/styrenated diphenylamines, and mixed butylated/octylated diphenylamines. 
     
     
         49 . The engine oil additive concentrate composition of  claim 48 , wherein the organomolybdenum compound is a molybdenum dithiocarbamate having the structure 
       
         
           
           
               
               
           
         
       
       wherein R is independently selected from hydrogen or an alkyl group containing 4 to 18 carbons, and X is independently selected from oxygen or sulfur. 
     
     
         50 . The engine oil additive concentrate composition of  claim 49 , wherein the concentration of 4,4′-methylenebis(2,6-di-tert-butylphenol) is between about 1 to about 50 weight percent of the total concentration of hindered phenolic, boronated hindered phenolic, alkylated diphenylamine and organomolybdenum compound, the concentration of mono- and di-boronated hindered phenolic is between about 10 to about 80 weight percent of the total concentration of hindered phenolic, boronated hindered phenolic, alkylated diphenylamine and organomolybdenum compound, the ratio of mono-boronated hindered phenolic to di-boronated hindered phenolic is between about 1:1 to about 1:0.01, the concentration of alkylated diphenylamine is between about 10 to about 80 weight percent of the total concentration of hindered phenolic, boronated hindered phenolic, alkylated diphenylamine and organomolybdenum compound, and the concentration of organomolybdenum compound is between about 1 to about 40 weight percent of the total concentration of hindered phenolic, boronated hindered phenolic, alkylated diphenylamine and organomolybdenum compound. 
     
     
         51 . The engine oil additive concentrate composition of  claim 50 , wherein the engine oil is used to lubricate an engine selected from the group consisting of a gasoline engine, a heavy duty diesel engine, a natural gas engine, a marine engine and a railroad engine. 
     
     
         52 . A method of increasing the concentration of at least one hindered phenolic antioxidant in a lubricant oil additive concentrate composition, the method comprising the step of adding at least one boronated hindered phenolic antioxidant to the lubricant oil additive concentrate.

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