| 摘要 |
<p>A grease composition which comprises a lube base oil, at least one of diurea compounds represented by the general formulae (1) to (3), a naphthenic acid salt, and either succinic acid or a derivative thereof, wherein the respective contents of the diurea compounds represented by the general formulae (1) to (3) satisfy the relationships (4) and (5) and the content of the naphthenic acid salt and that of the succinic acid or derivative thereof each is 0.1 to 10 wt.% based on the total amount of the grease composition. (1) (2) (3) (In the formulae (1) to (3), R1 represents a C7-12 aromatic-ring-containing hydrocarbon group; R2 represents a C6-15 divalent hydrocarbon group; and R3 represents cyclohexyl or C7-12 alkylcyclohexyl.) 5 ≤ W1+W2+W3 ≤ 35 (4) 0 ≤ (W1+0.5×W2)/(W1+W2+W3) ≤ 0.55 (5) [In the relationships (4) and (5), W1, W2, and W3 are the contents (wt.%) of the diurea compounds respectively represented by the general formulae (1) to (3) based on the total amount of the grease composition.]</p> |
