abstract |
PROBLEM TO BE SOLVED: To provide a lubricating composition containing an additive having excellent lubricating properties without causing toxicity and environmental problems such as chlorine-based and sulfur-based lubricating oil additives. The invention relates to a lubricating base, (A) the following formula as component (1) [R 1 O- ( R 2 -O) m] n -P - [- OH] 3-n (1) (wherein, R 1 and R 2 represent a hydrocarbon group, m represents a number of 1 or more, and n represents a number of 1 to 3) or a phosphite compound represented by the following formula: It is a lubricating composition containing a neutralized basic compound; and an organic molybdenum compound as the component (B). As the organic molybdenum compound, oxymolybdenum dithiocarbamate sulfide, oxymolybdenum dithiophosphate sulfide, or a reaction product of an amine and a pentavalent or hexavalent molybdenum compound is preferable. |