Shock absorber oil composition

Abstract

A shock absorber oil composition of the invention includes a base oil: (A) at least one of phosphate, amine phosphate salt, phosphite and amine phosphite salt; (B) an amide compound; and (C) a primary amine.

1 . A shock absorber oil composition comprising:
 a base oil;   a component (A) comprising at least one selected from the group consisting of a phosphate, an amine phosphate salt, a phosphite and an amine phosphite salt;   a component (B) that is an amide compound; and   a component (C) that is a primary amine.   
     
     
         2 . The shock absorber oil composition according to  claim 1 , wherein
 the component (A) has an alkyl group or an alkenyl group, and   the alkyl group or the alkenyl group has 12 to 20 carbon atoms.   
     
     
         3 . The shock absorber oil composition according to  claim 1 , wherein
 the component (B) has an alkyl group, and   the alkyl group has 12 to 20 carbon atoms.   
     
     
         4 . The shock absorber oil composition according to  claim 1 , wherein
 the component (C) has an alkyl group or an alkenyl group, and   the alkyl group or the alkenyl group has 12 to 20 carbon atoms.   
     
     
         5 . The shock absorber oil composition according to  claim 1 , wherein
 a content of the component (A) is in a range of 0.1 mass % to 1 mass % of a total amount of the composition,   a content of the component (B) is in a range of 0.1 mass % to 1 mass % of the total amount of the composition, and   a content of the component (C) is in a range of 0.01 mass % to 0.1 mass % of the total amount of the composition.   
     
     
         6 . The shock absorber oil composition according to  claim 1 , wherein
 the component (A) comprises a phosphate.   
     
     
         7 . The shock absorber oil composition according to  claim 1 , wherein
 the component (A) comprises an amine phosphate salt.   
     
     
         8 . The shock absorber oil composition according to  claim 1 , wherein
 the component (A) comprises a phosphite.   
     
     
         9 . The shock absorber oil composition according to  claim 1 , wherein
 the component (A) comprises an amine phosphite salt.   
     
     
         10 . The shock absorber oil composition according to  claim 1 , wherein
 the component (A) has an alkyl group, and   the alkyl group has 12 to 20 carbon atoms.   
     
     
         11 . The shock absorber oil composition according to  claim 1 , wherein
 the component (A) has an alkenyl group, and   the alkenyl group has 12 to 20 carbon atoms.   
     
     
         12 . The shock absorber oil composition according to  claim 2 , wherein
 the component (B) has an alkyl group, and   the alkyl group in the component (B) has 12 to 20 carbon atoms.   
     
     
         13 . The shock absorber oil composition according to  claim 10 , wherein
 the component (B) has an alkyl group, and   the alkyl group in the component (B) has 12 to 20 carbon atoms.   
     
     
         14 . The shock absorber oil composition according to  claim 11 , wherein
 the component (B) has an alkyl group, and   the alkyl group in the component (B) has 12 to 20 carbon atoms.   
     
     
         15 . The shock absorber oil composition according to  claim 1 , wherein
 the component (C) has an alkyl group, and   the alkyl group has 12 to 20 carbon atoms.   
     
     
         16 . The shock absorber oil composition according to  claim 1 , wherein
 the component (C) has an alkenyl group, and   the alkenyl group has 12 to 20 carbon atoms.