| 摘要 |
A urea grease composition comprising a lubricating base oil and from 2 to 30 wt.% of a thickening agent, with respect to the total weight of the urea grease composition and wherein said thickening agent is selected from: (1) a mixture of a compound (a) and a compound (b), containing compound (a) at 20 to 80 mol %, relative to the total amount of compound (a) and compound (b); (2) a mixture formed by mixing with a compound (c) with a mixture (1); or (3) a compound (c) alone, wherein the compounds are represented by the general formulae (a) R1NHCONHR2 NHCONHR1; (b) R3NHCONHR2NHCONHR3; and (c) R1NHCONHR2NHCONHR3, and wherein R2 is a diphenylmethane group, R1 is a C6-10 saturated alkyl group and R3 is a C14-40 saturated and/or unsaturated alkyl group wherein unsaturated alkyl groups constitute at least 20 mol % of the R 3 alkyl group.
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