公开(公告)号：US20190024008A1

公开(公告)日：2019-01-24

申请号：US16071688

申请日：2017-01-16

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Shinji AOKI ,  Hidenori TORII

IPC: C10M137/04 ,  C10M169/04 ,  C10M133/12 ,  C10M101/02

Abstract: Provided is a lubricating oil composition containing a base oil (A) and an amine-based antioxidant (B), wherein the component (B) contains a phenyl-naphthylamine (B1), an alkylphenyl-naphthylamine (B2) and a di(alkylphenyl)amine (B3), the content of the component (B1) is 2.0 to 10.0% by mass relative to 100% by mass of the total amount of the component (B), the content of the component (B2) is 40.0 to 90.0% by mass relative to 100% by mass of the total amount of the component (B), and the content of the component (B3) is 8.0 to 50.0% by mass relative to 100% by mass of the total amount of the component (B). The lubricating oil composition maintains excellent oxidation stability even in long-term use in high-temperature environments, and has an excellent lifetime and is excellent also in a sludge preventing effect.

公开(公告)号：US20230074611A1

公开(公告)日：2023-03-09

申请号：US17904439

申请日：2020-12-18

Applicant: Idemitsu Kosan Co.,Ltd.

Inventor： Masato YOKOMIZO ,  Koki ITO ,  Hidenori TORII ,  Shota KATO ,  Genki OKUYAMA

IPC: C10M171/00 ,  G01N21/64 ,  C10M127/04 ,  C10M133/12

Abstract: A lubricating oil composition having a fluorescent compound that emits a fluorescent light. The fluorescent compound has a property of deteriorating with relevance to a deterioration of the lubricating oil composition. A deterioration measurement device having a light emitter that emits an irradiation light toward a measurement target object including a fluorescent compound, a light receiver, and a sensor. A deterioration measurement system having a lubricating oil composition and a deterioration measurement device.