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公开(公告)号:US20230390166A1
公开(公告)日:2023-12-07
申请号:US18245761
申请日:2021-09-08
申请人: FUJIMI INCORPORATED
发明人: Mayumi Iwakuni , Keiji Ashitaka , Naoya Miwa
CPC分类号: A61K8/0254 , A61Q1/02 , A61Q1/12 , A61K2800/43 , A61K2800/412
摘要: Provided is a powder having excellent hiding power, such that the powder can be used in place of titanium dioxide as a white pigment in a cosmetic. The powder of the present invention includes plate-shaped crystal particles, the volume D50% diameter thereof is 0.7 μm or more and 8.0 μm or less, and a coefficient of variation (CV value) of a primary particle diameter is 1.0 or less.
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公开(公告)号:US20230016801A1
公开(公告)日:2023-01-19
申请号:US17848193
申请日:2022-06-23
申请人: Fujimi Incorporated
发明人: Shogo Tsubota , Masaaki Ito , Keiji Ashitaka , Jun Shinoda , Yusuke Kawasaki
摘要: The surface-modified colloidal silica according to an aspect of the present invention contains colloidal silica, and a surface-modifying group for modifying a surface of the colloidal silica, which has a polyoxyalkylene chain having a weight average molecular weight of 20,000 or more.
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公开(公告)号:US11767224B2
公开(公告)日:2023-09-26
申请号:US17950784
申请日:2022-09-22
申请人: FUJIMI INCORPORATED
发明人: Yusuke Kawasaki , Shogo Tsubota , Masaaki Ito , Jun Shinoda , Keiji Ashitaka
IPC分类号: C01B33/145 , C01B33/141 , C01B33/14
CPC分类号: C01B33/145 , C01B33/141 , C01B33/1412 , C01B33/14 , C01P2004/03 , C01P2004/62 , C01P2004/64
摘要: The present invention provides a means capable of suppressing the formation of fine particles in a method for producing a silica sol. The present invention relates to a method for producing a silica sol, including synthesizing a silica sol by, in a reaction liquid containing an alkoxysilane or a condensate thereof, water, and an alkali catalyst, allowing the alkoxysilane or condensate thereof to react with the water in the presence of the alkali catalyst, wherein the alkali catalyst is not additionally supplied after the start of the synthesis until the finish time of the synthesis, and during 90% or more of the time between when 5 minutes have elapsed from the time point when the electrical conductivity of the reaction liquid reaches a local maximum for the first time and the finish time of the synthesis, the proportion of the value of the electrical conductivity of the reaction liquid is more than 90% relative to the value of the electrical conductivity at the time when 5 minutes have elapsed from the time point when the local maximum is reached.
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公开(公告)号:US11760697B2
公开(公告)日:2023-09-19
申请号:US17042404
申请日:2019-03-26
申请人: FUJIMI INCORPORATED
发明人: Keigo Kamoshida , Souma Taguchi , Keiji Ashitaka , Naoya Miwa
IPC分类号: C04B35/80 , C04B35/626 , C04B35/628 , C04B35/634 , C04B35/64 , B28B19/00
CPC分类号: C04B35/80 , C04B35/6264 , C04B35/62802 , C04B35/62813 , C04B35/6342 , C04B35/63416 , C04B35/64 , B28B19/0046 , C04B2235/386 , C04B2235/3826 , C04B2235/5244 , C04B2235/5256 , C04B2235/5436 , C04B2235/616
摘要: Provided are a dispersion for a silicon carbide sintered body having a small environmental load, high dispersibility, and excellent temporal stability, and a manufacturing method thereof.
The dispersion is a dispersion for a silicon carbide sintered body, containing: silicon carbide particles; boron nitride particles; a resin having a hydroxyl group; and water, wherein the dispersion has a pH at 25° C. of less than or equal to 7.0, and the silicon carbide particles and the boron nitride particles have charges of the same sign. The dispersion is manufactured by a manufacturing method of a dispersion for a silicon carbide sintered body, including a mixing step of mixing a water dispersion containing silicon carbide particles, a water dispersion containing boron nitride particles, and an aqueous solution containing a resin having a hydroxyl group.-
公开(公告)号:US20220096342A1
公开(公告)日:2022-03-31
申请号:US17423627
申请日:2020-01-09
申请人: FUJIMI INCORPORATED
发明人: Mayumi Iwakuni , Keiji Ashitaka , Naoya Miwa
摘要: A titanium phosphate powder suitable as a raw material for cosmetic products and a raw material for coating materials is provided. A titanium phosphate powder according to one aspect of the present invention is a titanium phosphate powder including plate-shaped crystal particles of titanium phosphate, in which a modified layer is present on a surface of the plate-shaped crystal particles.
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6.
公开(公告)号:US11167995B2
公开(公告)日:2021-11-09
申请号:US16089945
申请日:2017-03-29
申请人: FUJIMI INCORPORATED
发明人: Souma Taguchi , Keiji Ashitaka , Naoya Miwa
摘要: Provided is a means capable of introducing a sufficient amount of a cationic group onto the surface of silica particles even in a case where a silica raw material having a high silica concentration is used while occurrence of gelation is suppressed at the time of or after addition of a silane coupling agent in production of a cationically modified silica dispersion including modifying raw silica using a silane coupling agent.
Adding a silane coupling agent having a cationic group to a silica raw material in which a zeta potential shows a negative value, and causing the silica raw material to react with the silane coupling agent to obtain a cationically modified silica.-
公开(公告)号:US11638681B2
公开(公告)日:2023-05-02
申请号:US17276288
申请日:2019-03-28
申请人: FUJIMI INCORPORATED
发明人: Mayumi Iwakuni , Keiji Ashitaka , Naoya Miwa
摘要: Provided is a white pigment for cosmetics capable of giving a cosmetic that gives a coating film having less stickiness and higher long-lasting properties. A white pigment for cosmetics of the present invention includes a titanium phosphate powder, the titanium phosphate powder includes crystal particles of titanium phosphate, and a ratio (oil absorption value/specific surface area) of an oil absorption value (ml/100 g) to a specific surface area (m2/g) of the crystal particles is 2.0 or more.
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8.
公开(公告)号:US11530335B2
公开(公告)日:2022-12-20
申请号:US16448992
申请日:2019-06-21
申请人: FUJIMI INCORPORATED
发明人: Keiji Ashitaka , Shogo Tsubota
IPC分类号: C09G1/02 , B24B37/00 , C01B33/146 , C09K3/14 , H01L21/304 , B24B37/04 , C01B33/148 , C01B33/149 , C07F7/02 , H01L21/3105 , H01L21/768
摘要: To provide modified colloidal silica capable of improving the stability of the polishing speed with time when used as abrasive grains in a polishing composition for polishing a polishing object that contains a material to which charged modified colloidal silica easily adheres, such as a SiN wafer, and to provide a method for producing the modified colloidal silica.
Modified colloidal silica, being obtained by modifying raw colloidal silica, wherein the raw colloidal silica has a number distribution ratio of 10% or less of microparticles having a particle size of 40% or less relative to a volume average particle size based on Heywood diameter (equivalent circle diameter) as determined by image analysis using a scanning electron microscope.-
公开(公告)号:US10604411B2
公开(公告)日:2020-03-31
申请号:US15748771
申请日:2016-07-25
申请人: FUJIMI INCORPORATED
发明人: Keiji Ashitaka , Masaaki Ito , Jun Shinoda
IPC分类号: C01B33/145 , C08L83/04 , B01J13/00
摘要: [Problem] Provided is a method for producing a silica sol capable of providing consistent production of the silica sol having a uniform particle size of silica particles in any particle size of the silica particles.[Solution] A method for producing a silica sol is a method including a step of mixing liquid (A) containing an alkaline catalyst, water, and a first organic solvent with liquid (B) containing an alkoxysilane or its condensate and a second organic solvent, and liquid (C1) having a pH of 5.0 or higher and lower than 8.0 and containing water or liquid (C2) containing water and being free of an alkaline catalyst to make a reaction liquid.
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公开(公告)号:US10570322B2
公开(公告)日:2020-02-25
申请号:US16245030
申请日:2019-01-10
申请人: FUJIMI INCORPORATED
发明人: Keiji Ashitaka , Shogo Tsubota
IPC分类号: C09K3/14 , C09G1/02 , B24B37/04 , H01L21/3105
摘要: Disclosed herein is a polishing composition comprising a pH of 6 or less, sulfonic acid-modified colloidal silica obtained by immobilizing sulfonic acid on surfaces of silica particles, and water, wherein the sulfonic acid-modified colloidal silica is derived from sulfonic acid-modified aqueous anionic silica sol produced by a production method comprising: a first reaction step of obtaining a reactant by heating raw colloidal silica having a number distribution ratio of 10% or less of microparticles having a particle diameter of 40% or less relative to a volume average particle diameter based on Heywood diameter (equivalent circle diameter) as determined by image analysis using a scanning electron microscope in the presence of a silane coupling agent having a functional group chemically convertible to a sulfonic acid group; and a second reaction step of converting the functional group to a sulfonic acid group by treating the reactant.
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