| 摘要 |
NEW MATERIAL:A compound shown by the formula (R1 and R2 are 4-13C hydrocarbon; R3 and R4 are 8-24C hydrocarbon; X is O or S; with the proviso that R1 and R2 are different from R3 and R4). USE:An additive for a lubricant for engine oils, etc. Having improved catalytic nontoxicity for exhaust gas cleaning, wear preventing properties, friction relaxing properties and solubility in a base oil, etc., acting effectively in a wide temperature and having a wide range of uses. PREPARATION:For example, an aqueous solution or aqueous suspension containing preferably equimolar amounts of molybdenum trioxide or an alkali metallic salt or ammonium salt of molybdic acid and an alkali hydrosulfide or an alkali sulfide shown by the formula M2S (M is alkali metal or ammonium) is adjusted to 0.5-8 pH, incorporated with carbon disulfide and a secondary amine [e.g., di(2-ethylhexyl)amine, etc.] and kept at >=80 deg.C. |
