Method Of Forming Additive Packages and Lubricant Compositions That Include A Seal Compatibility Additive

Abstract

This disclosure is directed to a method of forming an additive package for a lubricant composition. The method includes the step of providing a base oil and a dispersant, the step of heating the base oil and the dispersant, and the step of combining the base oil and the dispersant to form a first mixture. The method further includes the step of providing a detergent, the step of heating the detergent, and the step of combining the first mixture and the detergent to form a second mixture. The method further includes the step of providing an anti-wear additive and a seal compatibility additive, the step of heating the anti-wear additive the seal compatibility additive, and the step of combining the second mixture, the anti-wear additive, and the seal compatibility additive to form the additive package.

What is claimed is: 
     
         1 . A method of forming an additive package for a lubricant composition, said method comprising the steps of:
 providing a base oil and a dispersant;   heating the base oil and the dispersant to a temperature of from 75 to 115° C.;   combining the base oil and the dispersant to form a first mixture;   providing a detergent;   heating the detergent to a temperature of from 50 to 90° C.;   combining the first mixture and the detergent to form a second mixture;   providing an antioxidant, an anti-wear additive, and a seal compatibility additive;   heating the antioxidant, the anti-wear additive, and the seal compatibility additive to a temperature of from 30 to 70° C.; and   combining the second mixture, the antioxidant, the anti-wear additive, and the seal compatibility additive to form the additive package.   
     
     
         2 . The method of  claim 1 , wherein the seal compatibility additive comprises an epoxide compound, a boroxine compound, a sulfonate ester, a halogen compound, or combinations thereof. 
     
     
         3 . The method of  claim 1 , wherein the dispersant comprises an amine dispersant. 
     
     
         4 . The method of  claim 1 , wherein the anti-wear additive comprises a dihydrocarbyl dithiophosphate salt. 
     
     
         5 . The method of  claim 1 , wherein the detergent comprises a sulfonate, a phenate, or a combination thereof. 
     
     
         6 . The method of  claim 1 , wherein the antioxidant comprises an aminic antioxidant, a phenolic antioxidant, or a combination thereof. 
     
     
         7 . An additive package for a lubricant composition formed by the method of  claim 1 . 
     
     
         8 . A method of forming an additive package for a lubricant composition, said method comprising the steps of:
 providing a dispersant, a base oil, and a seal compatibility additive;   heating the dispersant, the base oil, and the seal compatibility additive to a temperature of from 30 to 70° C.;   combining the dispersant, the base oil, and the seal compatibility additive to form a first mixture;   providing a detergent;   heating the detergent to a temperature of from 30 to 70° C.;   combining the first mixture and the detergent to form a second mixture;   providing an antioxidant and an anti-wear additive;   heating the antioxidant and the anti-wear additive to a temperature of from 30 to 70° C.; and   combining the second mixture, the antioxidant, and the anti-wear additive to form the additive package.   
     
     
         9 . The method of  claim 8 , wherein the seal compatibility additive comprises an epoxide compound, a boroxine compound, a sulfonate ester, a halogen compound, or combinations thereof. 
     
     
         10 . The method of  claim 8 , wherein the dispersant comprises an amine dispersant. 
     
     
         11 . The method of  claim 8 , wherein the anti-wear additive comprises a dihydrocarbyl dithiophosphate salt. 
     
     
         12 . The method of  claim 8 , wherein the detergent comprises a sulfonate, a phenate, or a combination thereof. 
     
     
         13 . The method of  claim 8 , wherein the antioxidant comprises an aminic antioxidant, a phenolic antioxidant, or a combination thereof. 
     
     
         14 . An additive package for a lubricant composition formed by the method of  claim 8 . 
     
     
         15 . A lubricant composition that provides improved compatibility with fluoropolymer seals, said lubricant composition comprising:
 a first base oil; and   an additive package, comprising;
 a second base oil and a dispersant combined at a temperature of from 75 to 115° C., 
 a detergent combined at a temperature of from 50 to 90° C., and 
 an antioxidant, an anti-wear additive, and a seal compatibility additive combined at a temperature of from 30 to 70° C. 
   
     
     
         16 . The lubricant composition of  claim 15 , wherein said seal compatibility additive comprises an epoxide compound, a boroxine compound, a sulfonate ester, a halogen compound, or combinations thereof. 
     
     
         17 . The lubricant composition of  claim 15 , wherein said dispersant comprises an amine dispersant. 
     
     
         18 . The lubricant composition of  claim 15 , wherein said anti-wear additive comprises a dihydrocarbyl dithiophosphate salt. 
     
     
         19 . The lubricant composition of  claim 15 , wherein said detergent comprises a sulfonate, a phenate, or a combination thereof. 
     
     
         20 . The lubricant composition of  claim 15 , wherein said antioxidant comprises an aminic antioxidant, a phenolic antioxidant, or a combination thereof.