公开(公告)号：US11603627B2

公开(公告)日：2023-03-14

申请号：US16757861

申请日：2018-10-17

Applicant: SHOWA DENKO K.K.

Inventor： Takeshi Igarashi ,  Tomoyuki Takei ,  Yu Gao ,  Masumi Kuritani

IPC: D06M11/74 ,  D06M101/40

Abstract: By sequentially performing: a step (I) of dissolving fullerene C60 in a polyalkylene glycol to prepare a fullerene solution; a step (II) of immersing a material carbon fiber in the fullerene solution; and a step (III) of extracting the carbon fiber from the fullerene solution, washing the extracted carbon fiber with water, and drying the carbon fiber washed with water, a carbon fiber on which fullerene C60 adsorbs is obtained.

公开(公告)号：US11585043B2

公开(公告)日：2023-02-21

申请号：US16756250

申请日：2018-10-17

Applicant: SHOWA DENKO K.K.

Inventor： Takeshi Igarashi ,  Tomoyuki Takei ,  Yu Gao ,  Masumi Kuritani

IPC: D06M11/74 ,  C01B32/05 ,  C08J5/06 ,  D06M23/10 ,  C01B32/152 ,  D06Q1/10 ,  D06M10/00 ,  C08K3/04 ,  D06M101/40

Abstract: By sequentially performing: a step (I) of dissolving fullerene C70 in an organic solvent to prepare a fullerene solution; a step (II) of immersing a material carbon fiber in the fullerene solution; and a step (III) of extracting the carbon fiber from the fullerene solution and drying the extracted carbon fiber, a carbon fiber on which fullerene C70 adsorbs is obtained.

公开(公告)号：US11512424B2

公开(公告)日：2022-11-29

申请号：US16757863

申请日：2018-10-17

Applicant: SHOWA DENKO K.K.

Inventor： Takeshi Igarashi ,  Tomoyuki Takei ,  Yu Gao ,  Masumi Kuritani

IPC: D06M11/74 ,  C01B32/05 ,  C08J5/06 ,  D06M101/40

Abstract: A carbon fiber is obtained by sequentially performing: a step (I) of dissolving a fullerene mixture including fullerenes C60 and C70 in an organic solvent to prepare a fullerene solution; a step (II) of immersing a material carbon fiber in the fullerene solution; and a step (III) of extracting the carbon fiber from the fullerene solution and drying the extracted carbon fiber.

公开(公告)号：US11407960B2

公开(公告)日：2022-08-09

申请号：US16758115

申请日：2018-10-24

Applicant: SHOWA DENKO K.K.

Inventor： Ryuji Monden ,  Yu Gao ,  Kunio Kondo ,  Masumi Kuritani

IPC: C10M177/00 ,  C10M125/02 ,  C10M169/04 ,  C10N70/00

Abstract: A method for producing a lubricating oil composition includes: a step of mixing a base oil and fullerene, dissolving a soluble component of the fullerene in the base oil, and obtaining a mixture of the base oil and fullerene; a step of removing an insoluble component included in the mixture and obtaining a fullerene solution; and a step of heat-treating the fullerene solution.

公开(公告)号：US11220652B2

公开(公告)日：2022-01-11

申请号：US16769085

申请日：2018-12-04

Applicant: SHOWA DENKO K.K.

Inventor： Ryuji Monden ,  Yu Gao ,  Masumi Kuritani ,  Kunio Kondo

IPC: C10M177/00 ,  C10M113/02 ,  C10M169/02 ,  G01N15/02 ,  G01N33/28 ,  C10N70/00

Abstract: A method for inspecting a lubricant oil composition containing a base oil and a fullerene, the method including: measuring at least one of a lamellar length of the lubricating oil composition and a most abundant diameter in a particle size distribution obtained by a dynamic light scattering method, and selecting the lubricating oil composition whose measured value is within a set range.

公开(公告)号：US11214749B2

公开(公告)日：2022-01-04

申请号：US16758234

申请日：2018-10-24

Applicant: SHOWA DENKO K.K.

Inventor： Ryuji Monden ,  Yu Gao ,  Kunio Kondo ,  Masumi Kuritani

IPC: C10M125/02 ,  C10M169/04 ,  C10N60/00 ,  C10N30/06 ,  C10N40/25 ,  C10N60/10 ,  C10N60/12

Abstract: The lubricating oil composition includes a base oil and a fullerene adduct.