公开(公告)号：US20230265353A1

公开(公告)日：2023-08-24

申请号：US18005206

申请日：2021-07-21

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Shota KATO ,  Keiichi NARITA ,  Hiroaki KOSHIMA ,  Kenichi OGATA

IPC: C10M111/02 ,  C10M101/00 ,  C10M105/36 ,  C10M105/34

CPC classification number: C10M111/02 ,  C10M101/00 ,  C10M105/36 ,  C10M105/34 ,  C10M2203/1006 ,  C10M2207/2825 ,  C10M2207/2815 ,  C10N2030/02

Abstract: A lubricating oil composition may be superior in cooling performance, ensure electrical insulation, and have a high flash point. Such a lubricating oil composition may include a base oil (A) including an ester-based synthetic oil (A1), the content of the ester-based synthetic oil (A1) is 30% by mass to 100% by mass based on the total amount of the base oil (A), the ester-based synthetic oil (A1) is one or more of an ester (A1-1) of a monohydric alcohol and a monobasic acid and an ester (A1-2) of a monohydric alcohol and a polybasic acid, and the base oil (A) satisfies requirements (1) to (3): Requirement (1): the kinematic viscosity at 40° C. is 2.00 mm2/s to 4.00 mm2/s. Requirement (2): the specific heat at 20° C. is 1.75 kJ/(kg·K) or less. Requirement (3): the density at 20° C. is 0.850 g/cm3 or more.

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.

公开(公告)号：US20240182810A1

公开(公告)日：2024-06-06

申请号：US18552717

申请日：2022-03-18

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Kenji SUNAHARA ,  Shoichiro FUJITA ,  Masaya KUBOTA ,  Shota KATO

IPC: C10M169/04 ,  C10M133/44 ,  C10M135/10 ,  C10M135/18 ,  C10M137/10 ,  C10M139/00 ,  C10M141/12 ,  C10M145/14 ,  C10M161/00 ,  C10N20/04 ,  C10N30/02 ,  C10N30/04 ,  C10N30/06 ,  C10N40/25

CPC classification number: C10M169/044 ,  C10M133/44 ,  C10M135/10 ,  C10M135/18 ,  C10M137/10 ,  C10M139/00 ,  C10M141/12 ,  C10M145/14 ,  C10M161/00 ,  C10M2203/003 ,  C10M2209/084 ,  C10M2215/30 ,  C10M2219/044 ,  C10M2219/068 ,  C10M2223/045 ,  C10M2227/061 ,  C10M2227/066 ,  C10N2020/04 ,  C10N2030/02 ,  C10N2030/04 ,  C10N2030/06 ,  C10N2040/255

Abstract: A lubricating oil composition, including a base oil (P) and a copolymer (X). The copolymer (X) contains the following structural units (a) to (c): structural unit (a): a structural unit derived from a monomer (A) having a (meth)acryloyl group and a linear or branched alkyl group having 6 to 24 carbon atoms, structural unit (b): a structural unit derived from a monomer (B) having a (meth)acryloyl group and a polar group, and structural unit (c): a structural unit derived from a monomer (C) having a polymerizable functional group and a cyclic structural group. The copolymer (X) has a mass-average molecular weight (Mw) of 5,000 to 50,000, a content of the copolymer (X) in terms of resin content is 0.10% by mass to 2.5% by mass based on the total amount of the lubricating oil composition, and the lubricating oil composition has a 100° C. kinematic viscosity of 8.2 mm2/s or less.

公开(公告)号：US20240124638A1

公开(公告)日：2024-04-18

申请号：US18264803

申请日：2022-02-24

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Yoriyuki TAKASHIMA ,  Taeko NAKANO ,  Shota KATO

IPC: C08F279/02 ,  C08F220/18 ,  C10M143/12 ,  C10M145/14 ,  C10M169/04

CPC classification number: C08F279/02 ,  C08F220/1804 ,  C08F220/1818 ,  C10M143/12 ,  C10M145/14 ,  C10M169/041 ,  C10N2020/04

Abstract: A polymer composition contains a comb-shaped polymer (X) containing the following structural units (a) to (c): (a): a structural unit derived from a short-chain alkyl (meth)acrylate (A) having a short-chain alkyl group having 1 to 5 carbon atoms; (b): a structural unit derived from a long-chain alkyl (meth)acrylate (B) having a long-chain alkyl group having 6 to 32 carbon atoms; and (c): a structural unit derived from a macromonomer (C), a content of the structural unit (a) being 70% by mass or more based on the total structural units of the comb-shaped polymer (X); and a hetero atom-containing base oil (Y). The hetero atom-containing base oil (Y) has a kinematic viscosity at 40° C. of 25 mm2/s or less.

公开(公告)号：US20240150670A1

公开(公告)日：2024-05-09

申请号：US18547546

申请日：2022-03-31

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Shota KATO ,  Yukio YOSHIDA

IPC: C10M145/14 ,  C08F220/18 ,  C08F220/20 ,  C10M169/04

CPC classification number: C10M145/14 ,  C08F220/1807 ,  C08F220/1812 ,  C08F220/20 ,  C10M169/04 ,  C10N2030/06

Abstract: A lubricating oil additive composition containing a polymer-based compound may be excellent in solubility in a mineral oil and wear resistance, and favorable as a friction modifier. A lubricating oil composition may contain the additive composition. Such a lubricating oil additive composition may contain a copolymer (X) containing: (a) a structural unit derived from a monomer (A) having a (meth)acryloyl group and a linear or branched alkyl group having 6 to 24 carbon atoms; (b) a structural unit derived from a monomer (B) having a (meth)acryloyl group and a polar group; and (c) a structural unit derived from a monomer (C) having a polymerizable functional group and a cyclic structure group. The copolymer (X) may have a content of the structural unit (a) of 43% by mol or more based on the total structural units of the copolymer (X), and a mass average molecular weight (Mw) of 5,000 to 90,000.

公开(公告)号：US20230272297A1

公开(公告)日：2023-08-31

申请号：US18005692

申请日：2021-08-23

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Akio KOJIMA ,  Yukio YOSHIDA ,  Kenichi OGATA ,  Shota KATO ,  Keiichi NARITA

IPC: C10M107/32 ,  C10M107/24

CPC classification number: C10M107/32 ,  C10M107/24 ,  C10N2030/02

Abstract: A lubricating oil composition may have a high flash point, a low pour point, and excellent electrical insulation, while having excellent cooling performance. Such a lubricating oil composition may include a base oil (A), wherein the base oil (A) includes at least one synthetic oil (A1) selected from a polyalkylene glycol having a specific degree of polymerization and a polyvinyl ether having a specific degree of polymerization.

公开(公告)号：US20250059459A1

公开(公告)日：2025-02-20

申请号：US18720902

申请日：2022-12-23

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Shota KATO ,  Yukio YOSHIDA

IPC: C10M169/04 ,  C10M145/14 ,  C10M155/04 ,  C10M157/10 ,  C10N20/04 ,  C10N30/02

Abstract: A viscosity index improver composition which has an excellent viscosity index improving effect. A viscosity index improver composition which includes a poly(meth)acrylate (A) including a constituent unit (Y) derived from a monomer (y) having a diol functional group, and a poly(meth)acrylate (B) including a constituent unit (Z) derived from a monomer (z) having a boronic acid ester.

公开(公告)号：US20240026242A1

公开(公告)日：2024-01-25

申请号：US18256375

申请日：2021-12-28

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Yukio YOSHIDA ,  Shota KATO ,  Hideto KAMIMURA

IPC: C10M145/14 ,  C10M153/02 ,  C10M169/04 ,  C08F220/18 ,  C08F220/20 ,  C08F230/02

CPC classification number: C10M145/14 ,  C10M153/02 ,  C10M169/04 ,  C08F220/1812 ,  C08F220/20 ,  C08F230/02 ,  C10M2209/084 ,  C10M2225/02 ,  C10N2020/04

Abstract: A lubricating oil additive composition that is suitable as a load bearing additive, and is excellent in wear resistance, extreme pressure property, and thermal stability, and a lubricating oil composition containing the lubricating oil additive composition. A lubricating oil additive composition containing a poly(meth)acrylate-based copolymer (X) containing a structural unit (a) derived from a particular alkyl (meth)acrylate (A), a structural unit (b) derived from a particular hydroxy group containing (meth)acrylate (B), and a structural unit (c) derived from a particular phosphorus-containing (meth)acrylate (C).