Lubricating oil base oil, lubricating oil composition, and method for using lubricating oil composition

Abstract

A lubricating oil base oil may include a solid surface distance of 1.0 nm or more at a surface pressure of 12.4 MPa and a normalized peak intensity ratio of more than 0.2 to 1.0 measured using a resonance shear measurement system and a lubricating oil composition may include the lubricating oil base oil.

1 . A lubricating oil base oil, having a solid surface distance of 1.0 nm or more, measured using a resonance shear measurement system at a surface pressure of 12.4 MPa, and having a normalized peak intensity ratio of more than 0.2 to 1.0. 
     
     
         2 . The base oil of  claim 1 , wherein a viscosity η P  of the base oil at 40° C. measured at a surface pressure of 12.4 MPa, is in a range of from 10 to 50 mPa·s. 
     
     
         3 . The base oil to  claim 1 , wherein a viscosity η P  of the base oil at 40° C., measured at normal pressure, is in a range of from 5 to 50 mPa·s. 
     
     
         4 . The base oil of  claim 1 , which comprises an ester synthetic oil, a naphthenic synthetic oil, and/or a mineral oil. 
     
     
         5 . A traction drive, comprising the base oil of  claim 1 . 
     
     
         6 . A lubricating oil composition,. comprising the base oil of  claim 1 . 
     
     
         7 . A traction drive, comprising the composition of  claim 6 . 
     
     
         8 . The traction drive of  claim 7 , wherein the composition lubricates in a nanospace in which a distance between two surfaces of two opposing solids constituting the traction drive is 1.0 to 10 nm. 
     
     
         9 . A method of lubricating a traction drive, comprising contacting the traction drive with the composition of  claim 6 . 
     
     
         10 . The method of  claim 9 , comprising lubricating in a nanospace in which a distance between two surfaces of two opposing solids constituting the traction drive is 1.0 to 10 nm.