Lubricant compositions comprising epoxide compounds

Abstract

A lubricant composition including an epoxide compound is disclosed. An additive package including the epoxide compound is also disclosed. The epoxide compound of the lubricant composition acts to improve compatibility of the lubricant composition with a fluoropolymer seal and improve the total base number of the lubricant composition.

1 . A lubricant composition comprising:
 a base oil included in an amount of greater than 70 wt. % based on a total weight of said lubricant composition, wherein said base oil has a viscosity of from 1 to 20 cSt when tested at 100° C. according to ASTM D445, and wherein said base oil is selected from the group of API Group I base oils, API Group II base oils, API Group III base oils, and combinations thereof;   an epoxide compound; and   a sterically hindered amine compound having the general formula (XIV) or (XV):   
       
         
           
           
               
               
           
         
         
           wherein each R 16  is independently a hydrogen atom or a hydrocarbyl group having from 1 to 17 carbon atoms, wherein at least two groups designated by R 16  are each an alkyl group, 
           wherein each R 17  is independently a hydrogen atom or a hydrocarbyl group having from 1 to 17 carbon atoms, 
           wherein each R 18  is independently a hydrogen atom or a hydrocarbyl group having from 1 to 17 carbon atoms, wherein at least two groups designated by R 18  are each an alkyl group, 
           wherein each R 19  is independently a hydrogen atom or a hydrocarbyl group having from 1 to 17 carbon atoms, and 
           wherein the hydrocarbyl groups designated by R 16 , R 17 , R 18 , and R 19  are each independently and optionally substituted with an alcohol group, an amide group, an ether group, or an ester group. 
         
       
     
     
         2 . The lubricant composition of  claim 1  wherein said epoxide compound is a polyepoxide compound including at least two oxirane rings per molecule of the polyepoxide compound. 
     
     
         3 . The lubricant composition of  claim 2  wherein said polyepoxide compound has the formula: 
       
         
           
           
               
               
           
         
       
     
     
         4 . The lubricant composition of  claim 1  wherein said epoxide compound is included in an amount of from 0.05 to 5 wt. % based on a total weight of said lubricant composition. 
     
     
         5 . The lubricant composition of  claim 1  wherein said epoxide compound has a weight average molecular weight of from 30 to 1500. 
     
     
         6 . The lubricant composition of  claim 1  wherein said epoxide compound has a boiling point of from 50 to 450° C. at 1 atmosphere of pressure. 
     
     
         7 . The lubricant composition of  claim 1  wherein said epoxide compound has a flash point of from 25 to 250° C. at 1 atmosphere of pressure. 
     
     
         8 . The lubricant composition of  claim 1  wherein at least 50 wt. % of said epoxide compound remains unreacted in said lubricant composition based on a total weight of said epoxide compound utilized to form said lubricant composition prior to any reaction in said lubricant composition. 
     
     
         9 . The lubricant composition of  claim 1  wherein said lubricant composition is a crankcase lubricant composition. 
     
     
         10 . (canceled) 
     
     
         11 . The lubricant composition of  claim 1  wherein said sterically hindered amine compound is included in an amount of from 0.1 to 10 wt. % based on a total weight of said lubricant composition. 
     
     
         12 . The lubricant composition of  claim 11  wherein said sterically hindered amine compound is (2,2,6,6-tetramethyl-4-piperidyl) dodecanoate. 
     
     
         13 . The lubricant composition of  claim 1  further comprising an antiwear additive comprising phosphorous. 
     
     
         14 . The lubricant composition of  claim 13  wherein said antiwear additive comprising phosphorous is included in said lubricant composition in an amount of from 0.1 to 5 wt. % based on a total weight of said lubricant composition. 
     
     
         15 . The lubricant composition of  claim 1  further comprising a dispersant. 
     
     
         16 . The lubricant composition of  claim 15  wherein said dispersant is included in said lubricant composition in an amount of from 0.01 to 15 wt. % based on a total weight of said lubricant composition. 
     
     
         17 . (canceled) 
     
     
         18 . The lubricant composition of  claim 1  wherein said lubricant composition has a fluoropolymer seal compatibility such that a fluoropolymer seal submerged in said lubricant composition exhibits a change in elongation at rupture of from −60 to 10% when tested according to CEC L-39-T96. 
     
     
         19 . (canceled) 
     
     
         20 . (canceled) 
     
     
         21 . An additive package for a lubricant composition, said additive package comprising:
 an epoxide compound; and   a sterically hindered amine compound having the general formula (XIV) or (XV):   
       
         
           
           
               
               
           
         
         
           wherein each R 16  is independently a hydrogen atom or a hydrocarbyl group having from 1 to 17 carbon atoms, wherein at least two groups designated by R 16  are each an alkyl group, 
           wherein each R 17  is independently a hydrogen atom or a hydrocarbyl group having from 1 to 17 carbon atoms, 
           wherein each R 18  is independently a hydrogen atom or a hydrocarbyl group having from 1 to 17 carbon atoms, wherein at least two groups designated by R 18  are each an alkyl group, 
           wherein each R 19  is independently a hydrogen atom or a hydrocarbyl group having from 1 to 17 carbon atoms, and 
           wherein the hydrocarbyl groups designated by R 16 , R 17 , R 18 , and R 19  are each independently and optionally substituted with an alcohol group, an amide group, an ether group, or an ester group. 
         
       
     
     
         22 . The additive package of  claim 21  wherein said additive package further comprises an antiwear additive comprising phosphorous. 
     
     
         23 . A lubricant composition comprising:
 a base oil included in an amount of greater than 70 wt. % based on a total weight of said lubricant composition, wherein said base oil has a viscosity of from 1 to 20 cSt when tested at 100° C. according to ASTM D445, and wherein said base oil is selected from the group of API Group I base oils, API Group II base oils, API Group III base oils, and combinations thereof;   an epoxide compound present in an amount of from 0.1 to 2 wt. % based on a total weight of said lubricant composition;   an antiwear additive comprising phosphorous, wherein said antiwear additive is included in said lubricant composition in an amount of from 0.1 to 5 wt. % based on a total weight of said lubricant composition;   a sterically hindered amine in an amount of from 1 to 3 wt. % based on the total weight of said lubricant composition, wherein said sterically hindered amine is (2,2,6,6-tetramethyl-4-piperidyl) dodecanoate; and   a dispersant in an amount of from 0.01 to 15 wt. % based on a total weight of said lubricant composition.   
     
     
         24 . The lubricant composition of  claim 23  wherein said lubricant composition has a fluoropolymer seal compatibility such that a fluoropolymer seal submerged in said lubricant composition exhibits a change in elongation at rupture of from −60 to 10% when tested according to CEC L-39-T96.