A lubricant composition includes a base oil present in an amount of greater than 70 parts by weight per 100 parts by weight of the lubricant composition and an antioxidant. The antioxidant has the structure: wherein each X is independently CH or N, so long as at least one X is N. A is an electron donating group that (1) has an atom having at least one lone pair of electrons that is bonded directly to the aromatic ring or (2) is an aryl or alkyl group. Z is chosen from a hydrogen atom and an electron donating group that has an atom having at least one lone pair of electrons that is bonded directly to the aromatic ring or is an aryl or alkyl group.
一种润滑油组合物包括一种基础油(以每 100 份润滑油组合物的重量计,其含量大于 70 份)和一种
抗氧化剂。
抗氧化剂具有以下结构: 其中每个 X 独立地为 CH 或 N,只要至少一个 X 为 N。A 为电子供体,(1) 具有至少一个孤对电子的原子直接与芳香环键合,或 (2) 为芳基或烷基。Z 选自氢原子和电子供体基团,后者的原子至少有一对孤对电子,直接与芳香环键合,或者是芳基或烷基。