公开(公告)号：US20170327639A1

公开(公告)日：2017-11-16

申请号：US15532945

申请日：2015-12-02

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Kenji SASAKI ,  Akihiro SHISHIKURA ,  Noriyuki KUNISHI ,  Yukiko NAGAO

IPC: C08G64/08 ,  C08G64/40

CPC classification number: C08G64/085 ,  C08G64/186 ,  C08G64/24 ,  C08G64/406 ,  C08G77/06 ,  C08G77/448

Abstract: A method of producing a polycarbonate-polyorganosiloxane copolymer, including: a step (a) of obtaining a solution containing a polycarbonate-polyorganosiloxane copolymer through use of an alkaline aqueous solution of a dihydric phenol, phosgene, a polyorganosiloxane, and an organic solvent; a step (b) of continuously or intermittently draining the solution containing the copolymer from step (a), followed by separation of the drained solution into an aqueous phase and an organic phase to provide the organic phase with copolymer; and a step (c) of concentrating the organic phase with the from step (b) to remove the organic solvent, before heating the organic phase to a boiling region in the step (c), a viscosity of the organic phase being adjusted to 70 cP or less at 35° C., the polycarbonate-polyorganosiloxane copolymer obtained by the steps (a) to (c) including a polycarbonate-polyorganosiloxane copolymer containing a specific polycarbonate block (A) and a specific polyorganosiloxane block (B).

公开(公告)号：US20190300814A1

公开(公告)日：2019-10-03

申请号：US16469302

申请日：2018-01-17

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Akihiro SHISHIKURA ,  Tomonobu TAKADA ,  Hiroki SEKIGUCHI ,  Asami KOGA ,  Go WATANABE ,  Harutomo IKEDA

IPC: C10M169/00 ,  C10M101/02 ,  C10M125/10 ,  C10M133/42 ,  C10M129/08 ,  C10M117/06 ,  C10M117/02 ,  C10M141/06

Abstract: Provided is a grease composition which is excellent in fire extinguishing performance without water and can suppress fuming, malodor, and liquefaction on burning and a method for producing the grease composition.A grease composition contains a base oil (A), a thickener (B), and a fire retardant (C), wherein the base oil (A) contains a base oil (A1) having a 40° C. kinematic viscosity of 300 mm2/s or more, a sulfur content of 20 ppm by mass or less, and an initial boiling point of 400° C. or higher, the fire retardant (C) is at least one of aluminum hydroxide (C1) and 1,3,5-triazine-1,3,5 (2H, 4H, 6H)-tris(ethanol) (C2), and a content of the fire retardant (C) is 1.0 to 12.0 mass % based on a total amount of the grease composition.

公开(公告)号：US20220073837A1

公开(公告)日：2022-03-10

申请号：US17423252

申请日：2020-01-31

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Kouji TAKANE ,  Go WATANABE ,  Akihiro SHISHIKURA ,  Jun YAMASHITA

IPC: C10M169/00 ,  C10M107/02 ,  C10M101/02 ,  C10M115/08 ,  C10M133/12 ,  C10M129/74 ,  C10M141/06 ,  F16C33/10

Abstract: The present invention relates to a grease composition which can impart excellent durability to a bearing used under a high-speed rotation condition with a DN value of 100,000 or more, wherein the grease composition contains a base oil (A) and a urea-based thickener (B), and particles containing the urea-based thickener (B) in the grease composition satisfy requirement (I) that the particles have an arithmetic mean particle diameter of 2.0 μm or less on an area basis when measured by a laser diffraction scattering method. The grease composition is used for a bearing used under a high-speed rotation condition with a DN value of 100,000 or more.

公开(公告)号：US20210324290A1

公开(公告)日：2021-10-21

申请号：US17272556

申请日：2019-09-12

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Asami KOGA ,  Akihiro SHISHIKURA

IPC: C10M115/08 ,  F16D3/20 ,  C10M137/10 ,  C10M135/18

Abstract: A grease composition for constant velocity joints can have excellent wear resistance, and may include a base oil (A) and a urea-based thickening agent (B) of formula (B1): R1—NHCONH—R3—NHCONH—R2 (B1), wherein R1 and R2 are independently a monovalent C6 to C24 hydrocarbon group, R1 and R2 optionally differing; and R3 is a divalent C6 to C18 aromatic hydrocarbon group, the monovalent hydrocarbon group containing an alicyclic hydrocarbon group and a hydrocarbon chain, and optionally containing an aromatic hydrocarbon group, wherein, in R1 and R2 of formula (B1), if the content of the alicyclic hydrocarbon group is X molar equivalent, the content of the hydrocarbon chain is Y molar equivalent, and the content of the aromatic hydrocarbon group is Z molar equivalent, (a) and (b) are satisfied: (a): a value of {(X+Y)/(X+Y+Z)}×100 is 90 or more; (b): an X/Y ratio is 10/90 to 75/25.

公开(公告)号：US20210095219A1

公开(公告)日：2021-04-01

申请号：US16627861

申请日：2018-08-22

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Go WATANABE ,  Akihiro SHISHIKURA ,  Asami KAGA

IPC: C10M115/08 ,  C10M129/76

Abstract: A grease composition containing a base oil (A), a urea-based thickener (B), an antioxidant (C), and a rust inhibitor (D), wherein in a particle size distribution curve obtained by measuring the particle size of particles containing the urea-based thickener (B) in the grease composition on a volume basis with light scattering, a peak indicating the maximum frequency satisfies the following Requirements (I) and (II): (I) a particle size indicating the maximum frequency of the peak is 1.0 μm or less; and (II) a half width of the peak is 1.0 μm or less.

公开(公告)号：US20220162513A1

公开(公告)日：2022-05-26

申请号：US17434784

申请日：2020-02-27

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Akihiro SHISHIKURA

IPC: C10M115/08 ,  C10M169/02 ,  C10M169/04

Abstract: A grease composition may be used for speed reducers and speed increasers, being excellent in both torque transmission efficiency and leak prevention performance. The grease composition may contain a base oil (A) and a urea-based thickener (B), which is used for speed reducers and speed increasers, wherein the particles containing the urea-based thickener (B) in the grease composition satisfy the following requirement (I). Requirement (I): the area-based arithmetic average particle diameter of the particles is 2.0 μm or less, as measured by a laser diffraction/scattering method.

公开(公告)号：US20220135897A1

公开(公告)日：2022-05-05

申请号：US17435733

申请日：2020-02-27

Applicant: IDEMITSU KOSAN CO.,LTD.

Inventor： Akihiro SHISHIKURA

IPC: C10M169/00 ,  C10M101/02 ,  C10M107/02 ,  C10M115/08 ,  C10M137/08 ,  C10M135/18 ,  C10M137/10 ,  C10M159/12 ,  C10M129/40 ,  C10M133/12 ,  C10M135/10 ,  C10M141/10 ,  F16H57/04

Abstract: The present invention relates to provision of an extreme pressure agent-containing grease composition using, as a thickener, a urea-based thickener, the grease composition being excellent in both torque transmitting efficiency and leakage prevention performance and also excellent in wear resistance and load resistance. The grease composition contains a base oil (A), a urea-based thickener (B), and an extreme pressure agent (C), wherein particles containing the urea-based thickener (B) in the grease composition satisfies the following requirement (I): Requirement (I): an arithmetic average particle diameter of the particles on an area basis as measured by the laser diffraction/scattering method is 2.0 μm or less, and the extreme pressure agent (C) is at least one selected from an organic metal-based extreme pressure agent, a sulfur-based extreme pressure agent, a phosphorus-based extreme pressure agent, and a sulfur-phosphorus-based extreme pressure agent.

公开(公告)号：US20190300813A1

公开(公告)日：2019-10-03

申请号：US16318494

申请日：2017-11-29

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Akihiro SHISHIKURA

IPC: C10M169/00 ,  C10M117/04 ,  C10M117/06 ,  C10M135/18 ,  C10M137/10 ,  C10M141/10

Abstract: Provided is a mixed grease containing a grease (A) prepared from a base oil (a1) and a thickening agent (a2) that is a lithium soap consisting of a lithium salt of a monovalent fatty acid, and a grease (B) prepared from a base oil (b1) and a thickening agent (b2) that is a lithium complex soap consisting of a lithium salt of a monovalent fatty acid and a lithium salt of a divalent fatty acid. The mixed grease has good wear resistance and load bearing properties and has excellent grease leakage preventing properties.