GREASE COMPOSITION FOR AUTOMOTIVE ELECTRICAL EQUIPMENT AND AUXILIARY MACHINE AND ROLLING BEARING FILLED WITH THE GREASE COMPOSITION

摘要

PPROBLEM TO BE SOLVED: To provide a grease composition having excellent anti-seizing properties, even at a high temperature of approximately 180C, without making an unusual sound at an extremely low temperature of -40C, further having an excellent corrosion-resisting performance, and especially suitable for parts of electrical equipment, an engine auxiliary machine, etc., and to provide a rolling bearing. PSOLUTION: This grease composition for the automotive electrical equipment and auxiliary machine contains a base oil which contains an aromatic ester oil in an amount of 30 mass% based on the total amount of the base oil, and further contains a diurea compound which acts as a thickening agent and is expressed by general formula: R8-NHCONH-R9-NHCONH-R10 (R9 is a 6-15C aromatic hydrocarbon residue; and R8 and R10 are identical to or different from each other, and are each an aliphatic hydrocarbon residue, an alicyclic hydrocarbon residue or a condensed ring) in an amount of 5-35 wt% based on the total amount of the grease compound. Further, the rolling bearing which is filled with the grease composition is provided. PCOPYRIGHT: (C)2005,JPO&NCIPI