| abstract |
Provided is a grease composition with a long service life under high-temperature conditions, considerable low-evaporability, and incombustibility. n The invention provides a grease composition comprising, as a base oil, an ionic liquid formed of a cation and an anion and having an ion concentration of 1 mol/dm 3 or more as measured at 20° C., and a thickener having a dropping point of 260° C. or higher. |