Lubricant composition

Abstract

A lubricating oil composition including a base oil, a phosphorous acid ester, an imide-based compound, an amide-based compound, an amine-based compound, and a benzotriazole-based compound, wherein a content of the benzotriazole-based compound is 0.005 to 1.00 mass % based on the total amount of the lubricating oil composition.

1 . A lubricating oil composition, comprising:
 a base oil,   a phosphorous acid ester;   a non-boron modified imide-based compound;   an amide-based compound,   an amine-based compound, and   a benzotriazole-based compound,   wherein a content of the benzotriazole-based compound is 0.005 to 1.00 mass % based on a total amount of the lubricating oil composition.   
     
     
         2 . The lubricating oil composition of  claim 1 , wherein a content of the phosphorous acid ester is 0.01 to 3.00 mass % based on the total amount of the lubricating oil composition. 
     
     
         3 . The lubricating oil composition of  claim 1 , wherein a content ratio by mass of the benzotriazole-based compound to the phosphorous acid ester is 0.01 to 0.50. 
     
     
         4 . The lubricating oil composition of  claim 1 , wherein the non-boron modified imide-based compound comprises a non-boron modified alkenyl succinimide. 
     
     
         5 . The lubricating oil composition of  claim 1 , wherein the amide-based compound (D) comprises a fatty acid amide. 
     
     
         6 . The lubricating oil composition of  claim 5 , wherein a content of the fatty acid amide is 0.04 mass % or more based on the total amount of the lubricating oil composition. 
     
     
         7 . The lubricating oil composition of  claim 1 , wherein the amine-based compound (E) comprises a monoamine. 
     
     
         8 . The lubricating oil composition of  claim 1 , wherein the amine-based compound comprises at least one selected from the group consisting of a primary monoamine and a secondary monoamine. 
     
     
         9 . The lubricating oil composition of  claim 1 , wherein a content ratio by mass of the amine-based compound to the amide-based compound is 0.05 to 0.90. 
     
     
         10 . The lubricating oil composition of  claim 1 , wherein a content of a fatty acid partial ester compound is less than 0.05 mass % based on the total amount of the lubricating oil composition. 
     
     
         11 . The lubricating oil composition of  claim 1  wherein the lubricating oil composition is suitable to lubricate a transmission equipped with a clutch mechanism. 
     
     
         12 . A transmission filled with the lubricating oil composition of  claim 1 . 
     
     
         13 . A method for lubricating a transmission equipped with a clutch mechanism, comprising:
 applying the oil composition of  claim 1  to the transmission equipped with a clutch mechanism.   
     
     
         14 . The lubricating oil composition of  claim 2 , wherein a content ratio by mass of benzotriazole-based compound to the phosphorous acid ester is 0.01 to 0.50. 
     
     
         15 . The lubricating oil composition of  claim 2 , wherein the non-boron modified imide-based compound comprises a non-boron modified alkenyl succinimide. 
     
     
         16 . The lubricating oil composition of  claim 3 , wherein the non-boron modified imide-based compound comprises a non-boron modified alkenyl succinimide. 
     
     
         17 . The lubricating oil composition of  claim 2 , wherein the amide-based compound comprises a fatty acid amide. 
     
     
         18 . The lubricating oil composition of  claim 3 , wherein the amide-based compound comprises a fatty acid amide. 
     
     
         19 . The lubricating oil composition of  claim 4 , wherein the amide-based compound comprises a fatty acid amide. 
     
     
         20 . The lubricating oil composition of  claim 2 , wherein the amine-based compound comprises a monoamine.