Lubricant composition for a fluid dynamic bearing system and its use

Abstract

Lubricant composition for fluid dynamic bearing systems comprising: • 20 to 99.5 wt.% of a base fluid based on one or more mono-, di- and / or polyol esters, based on the total weight of the composition, and • and a conductivity additive, wherein the conductivity additive comprises at least one ionic liquid of the general formula [A+] [B-], wherein the anion [B-] is bis(fluorosulfonyl)imide [FSI]-, wherein the ionic liquid is present in an amount below 0.5 wt.%, based on the total weight of the lubricant composition.