| 摘要 |
PROBLEM TO BE SOLVED: To provide a grease composition which is used in a part to be lubricated where a sliding motion is made like a part to be lubricated where a rolling movement of an injection molding machine, a ball screw of a machine tool, a linear guide or the like is made. SOLUTION: The grease composition contains (a) 1-5 mass%, based on the composition, a mixture of thickening agents represented by formula (I): R<SP>1</SP>-NHCONH-R<SP>2</SP>-NHCONH-R<SP>1</SP>, formula (II): R<SP>1</SP>-NHCONH-R<SP>2</SP>-NHCONH-R<SP>3</SP>, and (III) R<SP>3</SP>-NHCONH-R<SP>2</SP>-NHCONH-R<SP>3</SP>, (wherein R<SP>2</SP>is a 6-15C divalent aromatic hydrocarbon group and R<SP>1</SP>and R<SP>3</SP>are groups different from each other and each a cyclohexyl group or an 8-20C straight chain or branched alkyl group), (b) a base oil containing not less than 80 mass% mineral oil based on the base oil, (c) an oil soluble MoDTC, and (d) calcium sulfonate and has a worked penetration of 400-500. COPYRIGHT: (C)2011,JPO&INPIT |
