| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a long-life grease composition with which a rolling bearing is lubricated in a wide temperature region from low temperature to high temperature and which is excellent in acoustic characteristics of the rolling bearing. <P>SOLUTION: The grease composition comprises: a synthetic oil as a base oil, containing a pentaerythritol tetraester oil; and a lithium soap as a thickener. The grease composition further comprises a 1-naphthylamine-based antioxidant (a) and a diphenylamine-based antioxidant (b), wherein the mass ratio of (a) to (b) is from 1:3 to 3:1. <P>COPYRIGHT: (C)2013,JPO&INPIT |
