Patent ID: 7838709
Filing Date: 2010-11-23
Classification: C10M,C10N

Abstract:
1. A lubricating base oil having: a saturated component content of 95% by mass or greater, a cyclic saturated component proportion which is measured based on ASTM D 2786-91 of no greater than 40% by mass of the saturated component, a viscosity index of 110 to 160, a kinematic viscosity at 100° C. of 3.7 to 4.5 mm a kinematic viscosity at 40° C. of 13 to 19 mm a solid point of −45 to −20° C., an iodine number of no greater than 2.5, a NOACK evaporation of 6 to 20% by mass, a ratio (M an aniline point of 106 or greater, a tertiary carbon proportion of 6 to 12% of the total constituent carbons, an ε-methylene proportion of 14 to 20% of the total constituent carbons, and an aromatic content of 0.4% by mass or greater.