| abstract |
(57) [Problem] To provide a grease composition having a long seizure life under high temperature and high speed conditions. SOLUTION: In a grease composition containing a base oil and a thickener, the base oil contains an ester oil, the thickener contains a diurea compound represented by the general formula (1), and the content of the diurea compound is Is 3 to 30% by weight of the composition. General formula (1) R 1 -NHCONH-R 2 -NHCONH-R 3 In the formula, R 1 and R 3 may be the same or different, and may be an aliphatic hydrocarbon group having 6 to 20 carbon atoms, or carbon. 6 atoms To 12 aromatic hydrocarbon groups, wherein the proportion of acyclic aliphatic hydrocarbon groups in the total amount of R 1 and R 3 is 90 to 100 % By weight, and R 2 represents a divalent aromatic hydrocarbon group having 6 to 15 carbon atoms. |