公开(公告)号：US20200231890A1

公开(公告)日：2020-07-23

申请号：US16489743

申请日：2018-03-09

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Tokue SATO

IPC: C10M101/02

Abstract: Provided is a mineral base oil that conforms to viscosity grades VG22 to VG100 as defined in ISO 3448 and exhibits a distillation curve with a temperature gradient Δ|DT| of distillation temperature between two points of 2.0 vol % and 5.0 vol % of distillation amount being 6.8° C./vol % or less. A vacuum pump oil containing the mineral base oil is excellent in vacuum characteristics and can conform to viscosity grades VG22 to VG100 as defined in ISO 3448.

公开(公告)号：US20190185781A1

公开(公告)日：2019-06-20

申请号：US16322015

申请日：2017-08-28

Applicant: Idemitsu Kosan Co., Ltd.

Inventor： Tokue SATO

IPC: C10M169/04 ,  C10M101/02 ,  C10M129/70 ,  C10M133/12 ,  C10M141/06

CPC classification number: C10M169/04 ,  C10M101/02 ,  C10M129/10 ,  C10M129/70 ,  C10M133/12 ,  C10M141/06 ,  C10M2203/1025 ,  C10M2207/284 ,  C10M2215/26 ,  C10N2220/022 ,  C10N2230/02 ,  C10N2230/40 ,  C10N2240/30

Abstract: Provided is a vacuum pump oil which contains a mineral oil (A) having a temperature gradient Δ|η*| of complex viscosity between two points of t (° C.) and t−10(° C.) (where −15≤t≤−10), as measured using a rotary rheometer at an angular velocity of 6.3 rad/s, of 10 Pa·s/° C. or less, and one or more compounds selected from a phenol-based compound (B) and an amine-based compound (C), and which has a viscosity index of less than 160. The vacuum pump oil has a good ultimate vacuum degree and is excellent in water separability, oxidation stability and shear stability, and is therefore applicable to various applications.

公开(公告)号：US20210002576A1

公开(公告)日：2021-01-07

申请号：US16977885

申请日：2019-03-27

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Tokue SATO

IPC: C10M169/04 ,  C10M133/12 ,  C10M129/76 ,  C10M137/12 ,  C10M141/10

Abstract: Provided is a lubricating oil composition containing a mineral base oil (A) having a temperature gradient Δ|Dt| of a distillation temperature between two points of a distillation amount of 2.0% by volume and a distillation amount of 5.0% by volume in a distillation curve of 6.8° C./% by volume or less, and an antioxidant (B) containing an amine-based antioxidant (B1), a phenol-based antioxidant (B2), and a phosphorus-based antioxidant (B3), wherein the content of the component (B3) is 0.06 to 1.0% by mass based on the total amount of the lubricating oil composition. The lubricating oil composition is a long-life lubricating oil composition that maintains excellent oxidation stability even for long-term use in a high-temperature environment, and has a high effect of suppressing the generation of sludge for a long period of time.

公开(公告)号：US20150337231A1

公开(公告)日：2015-11-26

申请号：US14650922

申请日：2013-12-18

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Tokue SATO

IPC: C10M141/10

CPC classification number: C10M141/10 ,  C10M2203/1006 ,  C10M2203/1025 ,  C10M2207/026 ,  C10M2207/262 ,  C10M2209/084 ,  C10M2215/064 ,  C10M2215/065 ,  C10M2215/223 ,  C10M2219/085 ,  C10M2223/043 ,  C10M2223/045 ,  C10M2223/047 ,  C10M2223/06 ,  C10M2229/02 ,  C10N2210/02 ,  C10N2230/04 ,  C10N2230/06 ,  C10N2230/10 ,  C10N2240/30

Abstract: A lubricating oil composition for a rotary compressor capable of imparting high extreme pressure property while maintaining high oxidation stability is provided by mixing, in (a) a base oil, (b) an antioxidant and (c) a dithiophosphate ester compound represented by the formula (I) in an amount of 0.05% by mass or more and less than 2.0% by mass based on the total composition.

Abstract translation: 通过在（a）基础油，（b）抗氧化剂和（c）由式（Ⅴ）表示的二硫代磷酸酯化合物的混合中提供一种能够赋予高的极压性能同时保持高氧化稳定性的旋转式压缩机的润滑油组合物， （I）的用量相对于总组合物为0.05质量％以上且小于2.0质量％。

公开(公告)号：US20230407202A1

公开(公告)日：2023-12-21

申请号：US18251760

申请日：2021-12-23

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Tokue SATO ,  Kenji GOTO

IPC: C10M169/04 ,  C10M129/74 ,  C10M133/40 ,  C10M129/40 ,  C10M133/06 ,  C10M129/10 ,  C10M137/04 ,  C10M141/10 ,  C10M155/02 ,  C10M161/00

CPC classification number: C10M169/044 ,  C10M129/74 ,  C10M133/40 ,  C10M129/40 ,  C10M133/06 ,  C10M129/10 ,  C10M137/04 ,  C10M141/10 ,  C10M155/02 ,  C10M161/00 ,  C10M2203/003 ,  C10M2207/283 ,  C10M2215/30 ,  C10M2207/126 ,  C10M2215/26 ,  C10M2207/023 ,  C10M2223/041 ,  C10M2229/02 ,  C10N2030/12

Abstract: A lubricating oil composition contains a base oil and a rust inhibitor, in which the base oil has a gas chromatogram measured by gas chromatography satisfying the particular condition (α), and the rust inhibitor is at least one selected from a first rust inhibitor, a second rust inhibitor, a third rust inhibitor, and a fourth rust inhibitor, and satisfies the particular condition (β).

公开(公告)号：US20210388287A1

公开(公告)日：2021-12-16

申请号：US17284847

申请日：2019-09-26

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Tokue SATO

IPC: C10M169/04 ,  C10M107/34 ,  C10M105/42 ,  C10M135/10 ,  C10M133/12

Abstract: Provided is a lubricating oil composition for air compressors containing a polyalkylene glycol-containing base oil (A) and a rust-preventive agent (B), wherein the content of the polyalkylene glycol is 65.0% by mass or more based on the total amount of the composition. The lubricating oil composition is excellent in oxidation stability and also in rust prevention and storage stability. Also provided are an air compressor lubricating method and an air compressor using the lubricating oil composition.