| abstract |
A grease composition having good compatibility with a boot made of rubber or a thermoplastic elastomer, and also providing low wear and friction. A grease composition for use in a constant velocity joint comprising a base oil composition, at least one trinuclear molybdenum compound represented by the following formula, and at least one urea derivative thickener. With. [Chemical 1] L: An independently selected ligand having an organic group with sufficient carbon atoms to make the compound soluble or dispersible in oil. n: 1-4. k: 4-7. Q: selected from the group of neutral electron donating compounds such as amines, alcohols, phosphines and ethers. z: 0 to 5 (including non-stoichiometric values). [Selection figure] None |