To provide a friction-reducing agent containing no sulfur nor phosphorus and being excellent in friction-reducing properties, and a lubricating oil composition using it. An alkanolamine represented by the following formula is used as a friction-reducing agent:
wherein A1 and A2 are each independently a hydroxy group or a hydrogen atom, provided that A1 and A2 are not hydrogen atoms at the same time, R1 is a hydrocarbon group having at most 30 carbon atoms, R2 to R6 are each independently a hydrogen atom or a hydrocarbon group having at most 30 carbon atoms, and m and n are each independently an integer of from 0 to 10.
提供一种不含
硫和
磷且具有优异减摩性能的减摩剂,以及使用该减摩剂的润滑油组合物。使用下式表示的烷醇胺作为减摩剂:
其中 A1 和 A2 各自独立地为羟基或
氢原子,但 A1 和 A2 不能同时为
氢原子;R1 为最多具有 30 个
碳原子的烃基;R2 至 R6 各自独立地为
氢原子或最多具有 30 个
碳原子的烃基;m 和 n 各自独立地为 0 至 10 的整数。