| 摘要 |
PROBLEM TO BE SOLVED: To provide a grease composition in which variation of viscosity is small even if it is used at a high temperature for a long period of time, oil separation is suppressed, and elongation of durability is attained. SOLUTION: The diurea grease composition contains a thickener in which diurea compound A and diurea compound B having a specific molecular structure respectively are mixed in a base oil comprising at least one kind of a dialkyl diphenyl ether, an ester based synthetic oil and a poly-α-olefin oil such that the ratio of 10-30 mass% of the thicknener, <obtained by mixing diurea compound A: diurea compound B=50-90:50-10 (mol%), is contained> based on the whole amount of the grease. COPYRIGHT: (C)2009,JPO&INPIT |
