Patent ID: 8722602

Claim:
A grease comprising: a base oil comprising at least 50% by mass of a diester compound of neopentyl glycol with 3,5,5-trimethylhexanoic acid or isodecanoic acid, and, as a thickener, a diurea compound represented by formula (2): R 6 —NHCONH—R 5 —NHCONH—R 7 (2) wherein R 6 and R 7 each independently represent (X) a C 6 to C 24 monovalent chain hydrocarbon group, (Y) a C 6 to C 12 monovalent alicyclic hydrocarbon group or (Z) a C 6 to C 12 monovalent aromatic hydrocarbon group, and R 5 represents a C 6 to C 15 divalent aromatic hydrocarbon group and wherein the x, y and z content (mole %) of the groups X, Y and Z, respectively, in the groups R 6 and R 7 satisfy the following formulas (a) and (b): ( x+y )/( x+y+z )≧0.98 (a) x/y =25/75 to 15/85 (b).