公开(公告)号：US20240425772A1

公开(公告)日：2024-12-26

申请号：US18685677

申请日：2022-07-25

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Kazushige MATSUBARA ,  Hiroyuki TATSUMI

IPC: C10M105/34 ,  C07C53/126 ,  C10N20/00 ,  C10N20/02

Abstract: A lubricant base oil having a natural origin content (ISO 16128) of 100%, may contain a monoester compound having one or more branched structures and 18 or more carbon atoms. The monoester compound may a compound of formula (1): wherein R1 and R2 are each independently a hydrocarbon group, at least one of R1 and R2 is a branched hydrocarbon group, and a total number of carbon atoms of R1 and R2 is 17 or more. In the compound of formula (1), R1 may be an alkyl group or alkenyl group having 8 or more carbon atoms, R2 may be an alkyl group or alkenyl group having 5 or more carbon atoms, and at least one of R1 and R2 may be a branched alkyl group or a branched alkenyl group

公开(公告)号：US20250145903A1

公开(公告)日：2025-05-08

申请号：US18836902

申请日：2023-03-17

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Hiroyuki TATSUMI ,  Kazushige MATSUBARA

IPC: C10M141/10 ,  C10M133/44 ,  C10M135/36 ,  C10M137/04 ,  C10M169/04 ,  C10N20/02 ,  C10N40/00 ,  C10N40/04 ,  F16H57/04 ,  H02K7/116 ,  H02K9/19

Abstract: A lubricating oil composition may contain a base oil (A), a phosphorous acid ester (B) having at least one sulfur atom-containing group having 2 to 20 carbon atoms, the sulfur atom-containing group having at least one —(S)x— group (x is an integer of 1 or more) between two adjacent carbon atoms in a structure of an alkyl group, a thiadiazole-based compound (C), and a benzotriazole-based compound (D). A content of the component (C) may be 0.01 mass % or more and less than 0.60 mass %, based on the total mass of the lubricating oil composition. A content of the component (D) is 0.02 mass % or more and less than 0.20 mass %, based on the total mass of the lubricating oil composition.

公开(公告)号：US20230120889A1

公开(公告)日：2023-04-20

申请号：US17907049

申请日：2021-03-25

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Kazushige MATSUBARA ,  Hiroyuki TATSUMI

IPC: C10M141/10 ,  C10M169/04 ,  C10M137/02 ,  C10M135/36

Abstract: A lubricating oil composition containing a phosphite ester derivative (A) having at least one alkyl group having 1 to 20 carbon atoms in which one —CH2— group is substituted with a —S— group, and a thiadiazole derivative (B). A method of lubricating an electric drive unit with the lubricating oil composition and an electric drive unit including the lubricating oil composition.

公开(公告)号：US20230039111A1

公开(公告)日：2023-02-09

申请号：US17792362

申请日：2021-01-15

Applicant: Idemitsu Kosan Co.,Ltd.

Inventor： Yasuhito NAKAHARA ,  Hiroyuki TATSUMI ,  Keiichi NARITA ,  Koki ITO

IPC: C10M131/04 ,  C10M101/02 ,  C10M169/04

Abstract: A lubricating oil composition which contains a base oil and a fluorine compound and may have improved cooling performance. The base oil may contain a mineral oil. The base oil may have a kinematic viscosity in a range of from 1 to 25 mm2/s at 40° C. The content of the fluorine compound may be in a range of from 3 to 30% by weight based on the total amount of the composition.

公开(公告)号：US20210355404A1

公开(公告)日：2021-11-18

申请号：US17287323

申请日：2019-10-25

Applicant: Idemitsu Kosan Co.,Ltd.

Inventor： Kazushi TAMURA ,  Hiroyuki TATSUMI

IPC: C10M105/32 ,  C10M101/02 ,  C10M171/02

Abstract: A lubricating oil base oil may include a solid surface distance of 1.0 nm or more at a surface pressure of 12.4 MPa and a normalized peak intensity ratio of more than 0.2 to 1.0 measured using a resonance shear measurement system and a lubricating oil composition may include the lubricating oil base oil.

公开(公告)号：US20240318094A1

公开(公告)日：2024-09-26

申请号：US18573541

申请日：2022-06-29

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Hiroyuki TATSUMI ,  Kazushige MATSUBARA

IPC: C10M141/08 ,  C10N20/02 ,  C10N40/25

CPC classification number: C10M141/08 ,  C10M2215/28 ,  C10M2219/106 ,  C10M2223/04 ,  C10N2020/02 ,  C10N2040/25

Abstract: A lubricating oil composition, containing the following components a base oil (A), a thiadiazole-based compound (B), and a boron-modified alkenyl succinimide (C). A content of the component (B) is less than 0.60 mass % based on a total amount of the lubricating oil composition, a content ratio [B/N] by mass of boron atoms to nitrogen atoms derived from the component (C) is 0.35 or more, and a content of boron atoms derived from the component (C) is 300 ppm by mass or less based on the total amount of the lubricating oil composition.

公开(公告)号：US20240043765A1

公开(公告)日：2024-02-08

申请号：US18258683

申请日：2021-12-20

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Kazushige MATSUBARA ,  Hiroyuki TATSUMI

IPC: C10M135/36 ,  C10M169/04 ,  C10M101/00 ,  C10M107/02 ,  C10M137/10

CPC classification number: C10M135/36 ,  C10M169/04 ,  C10M101/00 ,  C10M107/02 ,  C10M137/10 ,  C10N2030/02

Abstract: A lubricating oil composition containing a base oil (A) and a thiadiazole-based compound (B). A content of a sulfurized olefin is less than 0.20 mass % based on the total amount of the lubricating oil composition, and a kinematic viscosity of the lubricating oil composition at 100° C. is 2.1 mm2/s or more and less than 5.0 mm2/s.