| 摘要 |
PROBLEM TO BE SOLVED: To provide an aromatic ester-based grease base oil having inexpensive price and deterioration (increase of oxidation) at high temperature as same as, or less than conventional polyol esters, and excellent in viscosity index and low temperature fluidity, and to provide a grease composition using the same.SOLUTION: A grease composition having preferable performance balance as a grease can be obtained by using a mixture of benzene dicarboxylic acid diester having a specific structure as grease oil excellent in oxidation stability and a viscosity index. |
