Patent ID: 9663741
Date: 2017-05-30
CPC Classifications: C10M,C10N

Claim:
1. A lubricating base oil for a fluid bearing, the lubricating base oil comprising methylpentanediol diesters obtained by an esterification reaction of 3-methyl-1,5-pentanediol with n-undecanoic acid (component A) and aliphatic monocarboxylic acid (component B) selected from the group consisting of (B1) to (B5) below: (B1) n-hexanoic acid; (B2) n-octanoic acid; (B3) n-nonanoic acid; (B4) n-decanoic acid; or (B5) n-nonanoic acid and n-decanoic acid, the molar ratio of component A to component B being in the range of 30:70 to 70:30, wherein the amount of the methylpentanediol diesters in the lubricating base oil for a fluid bearing is 90 wt % or more.