| 摘要 |
PROBLEM TO BE SOLVED: To obtain a lubricating composition satisfactory in solubility and long drain properties by incorporating a lubricating base with asymmetrical and symmetrical sulfided oxymolybdenum dithiocarbamates and a phenolic or aminic antioxidant. SOLUTION: This composition comprises a lubricating base, 0.001-3 wt.%, based on the base, asymmetrical and symmetrical sulfided oxymolybdenum dithiocarbamates represented by formulae I and II, 0.01-10 wt.% phenolic or aminic antioxidant, and 0.001-3 wt.% (in terms of the phosphorus atoms) zinc dithiophosphate represented by formula II. The composition may optionally contain at least one member selected from among a metal cleaner, an ashless dispersant, a phosphorus-containing compound, a compound containing phosphorus and sulfur, a phosphorus-containing metal-free compound, a sulfur oxide, an organometallic compound, an oiliness improver, a rust preventive, etc. In the formulae, R1 to R7 are each a hydrocarbon group; X1 to X8 are each sulfur or oxygen; and a is 0 to 1/3. |
