Patent ID: 8703678

Claim:
A grease comprising: a base oil comprising at least 70% by mass of the base oil, of a diester compound having a total carbon number of 30, said diester compound represented by formula (I): R 1 OOC—(R 2 ) n —COOR 3 (I) wherein R 1 and R 3 each independently represent a C 4 to C 20 monovalent aliphatic hydrocarbon group, R 2 represents a C 1 to C 20 divalent hydrocarbon group and n is 0 or 1, and from 10 to 30% by mass of the grease of a urea thickener, wherein the urea thickener is a diurea compound represented by formula (V): R 4 —NHCONH—R 5 —NHCONH—R 6 (V) wherein R 4 and R 6 each independently represent a C 6 to C 24 monovalent chain hydrocarbon group or a C 6 to C 12 monovalent alicyclic hydrocarbon group, and R 5 represents a C 6 to C 15 divalent aromatic hydrocarbon group, where groups R 4 and R 6 satisfy formula (b): X/Y=30/70 to 5/95 (b) where X is a mole % of the chain hydrocarbon groups and Y is a mole % of the alicyclic hydrocarbon groups in the groups R 4 and R 6 .