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公开(公告)号:US20210139709A1
公开(公告)日:2021-05-13
申请号:US16341280
申请日:2017-10-18
Applicant: SAKAI CHEMICAL INDUSTRY CO., LTD.
Inventor: Tsutomu YAMAMOTO , Hironobu OGATA , Hiroaki HAMAMURA , Masayuki ASADA
Abstract: The present invention relates to fine barium sulfate powder that can be readily and simply dispersed in resins or solvents; a resin composition, a coating composition, an ink composition, and a resin molded article each containing the barium sulfate powder; and a method for producing the barium sulfate powder. Provided is barium sulfate powder having a number average primary particle size of 1 to 100 nm, the powder including an organic compound on its surface, the powder in the form of compressed compact having a contact angle with distilled water of 10 to 170 degrees.
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公开(公告)号:US20240002240A1
公开(公告)日:2024-01-04
申请号:US18247010
申请日:2021-09-21
Applicant: SAKAI CHEMICAL INDUSTRY CO., LTD.
Inventor: Yasuyuki MURAKAMI , Satsuki MOTOISHI , Hisao KOIZUMI , Satoshi KOMORI , Hironobu OGATA
IPC: C01B33/141
CPC classification number: C01B33/1415 , C01P2004/51 , C01P2002/01 , C01P2004/32 , C01P2004/64
Abstract: The present invention provides a boron-containing silica dispersion having better dispersion stability at a high concentration, and higher binding properties between boron and silica than conventional dispersions. The present invention is a boron-containing silica dispersion containing amorphous silica particles containing boron atoms and a dispersion medium; the boron-containing amorphous silica particles having an average particle size of 10 to 100 nm, as determined from 40 particles selected at random in a transmission electron micrograph; the boron-containing silica dispersion having a solids content of 5 to 30 mass %; and the boron-containing silica dispersion having a sedimentation rate of the particles of 4% or less, when the boron-containing silica dispersion is left standing for 1000 hours, and proportions of SiO2 and B2O3 of 90.0 to 99.8 mass % and 0.2 to 10.0 mass %, respectively, in 100 mass % of a total of SiO2 and B2O3, all terms of oxide, when the boron-containing silica dispersion is subjected to ultrafiltration by the following method and dried; washing is performed by sequentially adding pure water in an amount of 6 times the volume of the boron-containing silica dispersion at a flow rate of a liquid fed of 3660 ml/minute using an ultrafiltration membrane with a fraction molecular weight of 13,000.
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公开(公告)号:US20240150544A1
公开(公告)日:2024-05-09
申请号:US18547836
申请日:2022-02-07
Applicant: SAKAI CHEMICAL INDUSTRY CO., LTD.
Inventor: Kappei FUKUROI , Takuma IEDA , Toyonao YAMAUCHI , Hirotaka TAKETSUNA , Takashi SHIKIDA , Shinji IKESHITA , Hironobu OGATA
CPC classification number: C08K3/22 , C08K5/521 , C08K2003/2244 , C08K2201/003
Abstract: The present invention provides a zirconium element-containing resin composition capable of achieving both high transparency and a high refractive index. The present invention is a zirconium element-containing resin composition containing a zirconium element-containing metal oxide (A); a dispersant (B); and a polymerizable resin (C), in which the zirconium element-containing metal oxide (A) has an average particle diameter of 20 nm or less as measured by a dynamic light scattering method, and the dispersant (B) contains a compound represented by the following formula (1), the zirconium element-containing resin composition may contain a silane coupling agent, and a content ratio of the silane coupling agent is less than 30 parts by mass with respect to 100 parts by mass of a total of the compound represented by the formula (1) and the silane coupling agent.
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公开(公告)号:US20240166530A1
公开(公告)日:2024-05-23
申请号:US18550804
申请日:2022-03-16
Applicant: SAKAI CHEMICAL INDUSTRY CO., LTD.
Inventor: Takuma IEDA , Kappei FUKUROI , Takanori MORITA , Hironobu OGATA
IPC: C01G25/02
CPC classification number: C01G25/02 , C01P2004/64 , C01P2006/22 , C01P2006/80 , C01P2006/90
Abstract: An object of the present invention is to provide a dispersion of a zirconium element-containing metal oxide having high transparency and low viscosity even at high concentration. The present invention relates to a method of producing a zirconium element-containing metal oxide dispersion, and the production method includes a step of heating a slurry containing a zirconium element-containing compound as a metal element-containing compound to perform a hydrothermal reaction, in which the heating in the hydrothermal reaction step is performed at a temperature rising rate of 90° C./hour or more.
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公开(公告)号:US20230365419A1
公开(公告)日:2023-11-16
申请号:US18247242
申请日:2021-09-21
Applicant: SAKAI CHEMICAL INDUSTRY CO., LTD.
Inventor: Yasuyuki MURAKAMI , Satsuki MOTOISHI , Hisao KOIZUMI , Satoshi KOMORI , Hironobu OGATA
IPC: C01B33/193
CPC classification number: C01B33/193 , C01P2002/02 , C01P2004/64 , C01P2004/04 , C01P2002/54 , C01P2006/12 , C01P2002/88
Abstract: Provided is a boron-containing amorphous silica powder more excellent in terms of low temperature sinterability than conventional silica powders. The present invention relates to amorphous silica powder containing boron atoms, the boron-containing amorphous silica powder having an average particle size of 10 to 100 nm, as determined from 40 particles selected at random in a transmission electron micrograph, the boron-containing amorphous silica powder having a decrement in a boron content of 10 mass % or less, when fired under the following conditions:
5 to 10 g of a dried product of the boron-containing amorphous silica powder is filled into an alumina crucible, heated in the atmosphere at 200° C./hour to 1000° C. to 1100° C., maintained as it is for 5 hours, and cooled to room temperature.-
公开(公告)号:US20200270139A1
公开(公告)日:2020-08-27
申请号:US16063762
申请日:2016-12-23
Applicant: SAKAI CHEMICAL INDUSTRY CO., LTD.
Inventor: Satoru SUEDA , Hironobu OGATA
Abstract: The invention provides a low alpha dose barium sulfate particle having a silica content of 0.6% by weight or less and an alpha dose of 0.07 cph/cm2 or less.
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公开(公告)号:US20200270138A1
公开(公告)日:2020-08-27
申请号:US16063748
申请日:2016-12-23
Applicant: SAKAI CHEMICAL INDUSTRY CO., LTD.
Inventor: Satoru SUEDA , Hironobu OGATA
Abstract: The invention provides a low alpha dose barium sulfate particle having a silica content of 0.6% by weight or less, an average particle diameter of 1 μm or less, a sulfur content of 10 ppm or less, and an alpha dose of 0.07 cph/cm2 or less.
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