| 摘要 |
<p>A grease for bearings which shows improved penetration into lubrication parts and enables bearings to have a long life even in a high-temperature environment. It is a grease composition which comprises a base oil and a thickener and is characterized in that the base oil comprises a synthetic ester oil, the content of the synthetic ester oil being 20 mass% or higher based on the whole base oil, and the thickener comprises a diurea compound represented by the following general formula (I). (I) R1-NHCONH-R2-NHCONH-R3 In the formula, R2 represents a C6-15 divalent aromatic hydrocarbon group;and R1 and R3 are the same or different and each represents cyclohexyl or C8-22 linear or branched alkyl, provided that the proportion of the number of moles of the cyclohexyl groups to the total number of moles of the cyclohexyl groups and the C8-22 linear or branched alkyl groups is 60-95%.</p> |
