| abstract |
Provided new type of succinic imide compound and a manufacturing method thereof, a lubricating oil additive containing the compound, a diesel engine lubricating oil composition having excellent corrosion anti-wear properties with respect to SO X. The invention relates to a reaction product of an acid compound with a polyamine, in the IR spectrum, there are 1640 absorbance peak of ± 10 cm -1 (alpha peak) and 1700 absorbance peak of ± 10 cm -1 (beta peak), and A succinimide compound having an α peak to β peak intensity ratio (α peak intensity / β peak intensity) of 0.12 or more. (A) at least one compound selected from the group consisting of sulfonates, phenates and salicylates of overbased alkaline earth metals, and (B) a production method, a lubricant additive containing the compound, a lubricant base oil, A lubricating oil composition for a diesel engine comprising the above succinimide compound. [Selection figure] None |