Lubricant Composition

Abstract

A lubricant composition includes a base oil and an additive package. The additive package includes a seal compatibility additive chosen from a halide seal compatibility additive, an epoxide seal compatibility additive, a boroxine seal compatibility additive, a sulfonate ester seal compatibility additive, and combinations thereof. The alkoxylated amide and the ester are set forth in general formulas A and B, respectively: In general formulas A and B, each R 13 , R II , R III , and R IV , is, independently, a linear or branched, saturated or unsaturated, hydrocarbyl group. In addition, at least one of R II and R III include an alkoxy group, and R IV includes an amine group.

What is claimed is: 
     
         1 . A lubricant composition comprising:
 a base oil; and   an additive package comprising:
 a seal compatibility additive chosen from a halide seal compatibility additive, an epoxide seal compatibility additive, a boroxine seal compatibility additive, a sulfonate ester seal compatibility additive, and combinations thereof; 
 an alkoxylated amide having a general formula (A): 
   
       
         
           
           
               
               
           
         
         
            and 
           an ester having a general formula (B): 
         
       
       
         
           
           
               
               
           
         
         
           wherein each R 13 , R II , R III , and R IV , is, independently, a linear or branched, saturated or unsaturated, hydrocarbyl group, 
           at least one of R II  and R III  comprises an alkoxy group, and 
           R IV  comprises an amine group. 
         
       
     
     
         2 . The lubricant composition of  claim 1  wherein said seal compatibility additive is an epoxide compound that has the general formula: 
       
         
           
           
               
               
           
         
         wherein each Z and R 11  is independently a substituted or unsubstituted divalent hydrocarbon group. 
       
     
     
         3 . The lubricant composition of  claim 1  wherein said seal compatibility additive is an epoxide compound that has the general formula: 
       
         
           
           
               
               
           
         
         wherein each Z and R 12  is independently a substituted or unsubstituted divalent hydrocarbon group. 
       
     
     
         4 . The lubricant composition of  claim 1 , wherein said seal compatibility additive is an epoxide compound, wherein the epoxide compound includes fewer than five oxirane rings per molecule of said epoxide compound, and wherein said epoxide compound has a weight average molecular weight of from 30 to 1500. 
     
     
         5 . (canceled) 
     
     
         6 . The lubricant composition  claim 5  wherein said epoxide compound has the following structure: 
       
         
           
           
               
               
           
         
       
     
     
         7 . The lubricant composition of  claim 1  wherein at least one of R II  and R III  of said alkoxylated amide comprises at least one propoxy group. 
     
     
         8 . The lubricant composition of  claim 1  wherein:
 R II  of said alkoxylated amide has a general formula: 
 
       
         
           
           
               
               
           
         
       
       and;
 R III  of said alkoxylated amide has a general formula: 
 
       
         
           
           
               
               
           
         
       
       wherein;
 each R 17  is, independently, an alkyl group, 
 each R 18  is, independently, an alkoxy group, 
 n is an integer from 0 to 5, 
 m is an integer from 0 to 5, and 
 1≤(n+m)≤5. 
 
     
     
         9 . The lubricant composition of  claim 8  wherein 1≤(n+m)≤3. 
     
     
         10 . The lubricant composition of  claim 1  wherein R IV  has a general formula (XIV): 
       
         
           
           
               
               
           
         
         wherein;
 R 17  is an alkyl group, and 
 each R 19  and R 20  is, independently, a linear or branched, saturated or unsaturated hydrocarbyl group. 
 
       
     
     
         11 . The lubricant composition of  claim 10  wherein:
 R 19  is a hydrocarbyl group having a general formula (XV): 
 
       
         
           
           
               
               
           
         
       
       and
 R 20  is a hydrocarbyl group having a general formula (XVI): 
 
       
         
           
           
               
               
           
         
         wherein;
 each R 17  is, independently, an alkyl group, 
 each R 18  is, independently, an alkoxy group, 
 q is an integer from 0 to 5, 
 if q is 0, p is an integer from 0 to 5, 
 if q is ≥0, p is an integer from 1 to 5, and 
 0≤(p+q)≤5. 
 
       
     
     
         12 . The lubricant composition of  claim 11  wherein 0≤(p+q)≤3. 
     
     
         13 . The lubricant composition of  claim 1  wherein R 13  of said alkoxylated amide and said ester are each, independently, a linear or branched, saturated or unsaturated, C 7 -C 23  aliphatic hydrocarbyl group. 
     
     
         14 . The lubricant composition of  claim 12  wherein R 13  of said alkoxylated amide or said ester comprises a hydroxyl group. 
     
     
         15 . The lubricant composition of  claim 1  wherein:
 said alkoxylated amide is further defined as having a general formula:
   R 13 —C(═O)—N[R 17 —O—R 18   n —H][R 17 —O—R 18   m —H]; and
 
 
 said ester is further defined as having a general formula:
   R 13 —C(═O)—O—R 17 —N[R 17 —O—R 18   q —H][R 18   p —H];
 
 
 wherein,
 each R 13  is, independently, a linear or branched, saturated or unsaturated, C 7 -C 23  aliphatic hydrocarbyl group, 
 each R 17  is, independently, an alkyl group, 
 each R 18  is, independently, an alkoxy group, 
 n is an integer from 0 to 5, 
 m is an integer from 0 to 5, 
 1≤(n+m)≤5, 
 q is an integer from 0 to 5, 
 if q is 0, p is an integer from 0 to 5, 
 if q is >0, p is an integer from 1 to 5, and 
 0≤(p+q)≤5. 
 
 
     
     
         16 . The lubricant composition of  claim 1  wherein said alkoxylated amide has the following formula: 
       
         
           
           
               
               
           
         
         wherein R 13  is a linear or branched, saturated or unsaturated, C 7 -C 23  aliphatic hydrocarbyl group. 
       
     
     
         17 . The lubricant composition of  claim 1  wherein said ester has the following formula: 
       
         
           
           
               
               
           
         
         wherein R 13  is a linear or branched, saturated or unsaturated, C 7 -C 23  aliphatic hydrocarbyl group. 
       
     
     
         18 . The lubricant composition according to  claim 1  wherein said seal compatibility additive is an epoxide compound that has the following chemical structure: 
       
         
           
           
               
               
           
         
         wherein said alkoxylated amide has the following formula: 
       
       
         
           
           
               
               
           
         
         wherein said ester has the following formula: 
       
       
         
           
           
               
               
           
         
       
       and
 wherein each R 13  of said alkoxylated amide and said ester is, independently, a linear or branched, saturated or unsaturated, C 7 -C 23  aliphatic hydrocarbyl group. 
 
     
     
         19 . The lubricant composition of  claim 1  wherein said seal compatibility additive is an epoxide compound that is present in an amount of 0.01 to 8 wt. %, based on the total weight of said lubricant composition; and
 wherein said alkoxylated amide and said ester are present in a combined total amount of 0.01 to 8 wt. %, based on the total weight of said lubricant composition. 
 
     
     
         20 . The lubricant composition of  claim 1  having a fluoropolymer seal compatibility such that a fluoropolymer seal submerged in said lubricant composition exhibits a change in tensile strength of from −50 to 10% when tested according to CEC L-39-T96. 
     
     
         21 . (canceled) 
     
     
         22 . An additive package comprising:
 a seal compatibility additive chosen from a halide seal compatibility additive, an epoxide seal compatibility additive, a boroxine seal compatibility additive, a sulfonate ester seal compatibility additive, and combinations thereof;
 an alkoxylated amide having a general formula (A): 
   
       
         
           
           
               
               
           
         
         
            and 
           an ester having a general formula (B): 
         
       
       
         
           
           
               
               
           
         
         
           wherein each R 13 , R II , R III , and R IV , is, independently, a linear or branched, saturated or unsaturated, hydrocarbyl group, 
           at least one of R II  and R III  comprises an alkoxy group, and 
           R IV  comprises an amine group.