Patents Assigned to AGC Si-Tech CO., LTD
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Publication number: 20240122818Abstract: The present invention relates to light-scattering silica particles having a light scattering property, the light-scattering silica particles including: a plurality of hollow portions each having a closed pore structure inside the particle, in which the light-scattering silica particles have a volume-based cumulative 50% particle diameter of 1 ?m to 500 ?m and an average circularity of 0.80 or more, and in use of the light-scattering silica particles, a reflectance A of a water cake containing 20 mg/cm2 of silica per measurement cross-sectional area at an ultraviolet wavelength of 310 nm is 30% or more.Type: ApplicationFiled: December 27, 2023Publication date: April 18, 2024Applicants: AGC Inc., AGC SI-TECH CO., LTD.Inventors: Hajime KATAYAMA, Masashi KONDO, Kohta FUKUMOTO, Yuriko TAKANO, Shinnosuke ARIMITSU, Takeshi MURAKAMI, Kenji HIGASHI, Daisuke YAMAZUMI
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Publication number: 20230348283Abstract: The present invention relates to hydrophobic silica particles including silica particles each being impregnated with a higher alcohol having 19 or more carbon atoms, and having a binding degree of the higher alcohol to the silica particles of 70% or more measured by the following measuring method: the measuring method: 1 g of the hydrophobic silica particles is dispersed in 10 mL of tetrahydrofuran, and after maintaining the dispersed state for 5 minutes, a filtered residue is washed with 20 mL of tetrahydrofuran and 20 mL of hexane and dried, and a ratio, represented by Equation (1), of a carbon content of the hydrophobic silica particles after washing to a carbon content of the hydrophobic silica particles before washing is defined as the binding degree, binding degree (%)=carbon content (%) of hydrophobic silica particles after washing/carbon content (%) of hydrophobic silica particles before washingĂ—100 (1).Type: ApplicationFiled: June 21, 2023Publication date: November 2, 2023Applicant: AGC SI-TECH CO., LTD.Inventors: Shinnosuke ARIMITSU, Naoyuki IZUMI
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Publication number: 20230302431Abstract: The present invention relates to an adsorbent including: an inorganic porous body; and an amine compound, in the inorganic porous body has an oil absorption value of 230 ml/100 g or more, and a peak diameter of a pore size, which is obtained based on a nitrogen adsorption method, of 20 nm or more and 100 nm or less. The present invention relates to an adsorbent including: an inorganic porous body; and an amine compound, in which the inorganic porous body has a pore volume of 1.2 cm3/g or more and 3.5 cm3/g or less, and a peak diameter of a pore size, which is obtained based on a nitrogen adsorption method, of 20 nm or more and 100 nm or less.Type: ApplicationFiled: May 12, 2023Publication date: September 28, 2023Applicants: AGC Inc., AGC SI-TECH CO., LTD.Inventors: Eisuke MUROTANI, Ryohei KOGUCHI, Taku YAMADA, Katsumasa NAKAHARA, Hajime KATAYAMA, Masaki INOUE
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Publication number: 20230138940Abstract: To provide hollow silica particles having a dense silica shell layer. A method for producing hollow silica particles, which comprises: adjusting the pH of an oil-in-water emulsion containing an aqueous phase, an oil phase and a surfactant to at most 3.0 and adding a first silica material to the oil-in-water emulsion, adding a second silica material to the emulsion having the first silica material added, at its pH of at least 8, in the presence of alkali metal ions, to obtain a hollow silica precursor dispersion, and obtaining a hollow silica precursor from the hollow silica precursor dispersion and obtaining hollow silica particles from the hollow silica precursor.Type: ApplicationFiled: December 29, 2022Publication date: May 4, 2023Applicants: AGC Inc., AGC Si-Tech Co., Ltd.Inventors: Hiroyuki KAMIYA, Hyunji KIM, Toshiya MATSUBARA
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Patent number: 11608273Abstract: To provide hollow silica particles having a dense silica shell layer. A method for producing hollow silica particles, which comprises: adjusting the pH of an oil-in-water emulsion containing an aqueous phase, an oil phase and a surfactant to at most 3.0 and adding a first silica material to the oil-in-water emulsion, adding a second silica material to the emulsion having the first silica material added, at its pH of at least 8, in the presence of alkali metal ions, to obtain a hollow silica precursor dispersion, and obtaining a hollow silica precursor from the hollow silica precursor dispersion and obtaining hollow silica particles from the hollow silica precursor.Type: GrantFiled: May 28, 2020Date of Patent: March 21, 2023Assignees: AGC Inc., AGC Si-Tech Co., Ltd.Inventors: Hiroyuki Kamiya, Hyunji Kim, Toshiya Matsubara
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Publication number: 20230052900Abstract: The present invention relates to a hydroxyapatite-supporting porous silica particle, in which hydroxyapatite is supported on a surface a spherical porous silica particle and inner surfaces of pores of the spherical porous silica particle, and in which the hydroxyapatite-supporting porous silica particle has a circularity of 0.760 or larger, a method for producing the hydroxyapatite-supporting porous silica particles, and a composition containing the hydroxyapatite-supporting porous silica particle.Type: ApplicationFiled: October 7, 2022Publication date: February 16, 2023Applicant: AGC SI-TECH CO., LTD.Inventor: Takeshi MURAKAMI
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Publication number: 20220411275Abstract: The present invention related to a hollow silica particle including: a shell layer containing silica; and a space formed inside the shell layer, in which the hollow silica particle has a particle density as measured by a dry pycnometer density measurement using helium gas of 2.00 g/cm3 or more and a particle density as measured by a dry pycnometer density measurement using oxygen gas of lower than 2.00 g/cm3.Type: ApplicationFiled: August 19, 2022Publication date: December 29, 2022Applicants: AGC Inc., AGC SI-TECH CO., LTD.Inventors: Toshiya MATSUBARA, Hyunji KIM, Hajime KATAYAMA, Yusuke ARAI
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Publication number: 20220396490Abstract: The present invention relates to hollow silica particles, which each includes a shell layer containing silica and a space inside the shell layer, in which the hollow silica particles have a peak intensity derived from SiOH at a wavenumber of around 3,746 cm?1 of 0.60 or less by infrared spectroscopy, a relative permittivity at 1 GHz of from 1.3 to 5.0 and a dielectric loss tangent at 1 GHz of from 0.0001 to 0.05.Type: ApplicationFiled: August 22, 2022Publication date: December 15, 2022Applicants: AGC Inc., AGC SI-TECH CO., LTD.Inventors: Hiromichi KAMO, Masashi KONDO, Hajime KATAYAMA
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Publication number: 20200283300Abstract: To provide hollow silica particles having a dense silica shell layer. A method for producing hollow silica particles, which comprises: adjusting the pH of an oil-in-water emulsion containing an aqueous phase, an oil phase and a surfactant to at most 3.0 and adding a first silica material to the oil-in-water emulsion, adding a second silica material to the emulsion having the first silica material added, at its pH of at least 8, in the presence of alkali metal ions, to obtain a hollow silica precursor dispersion, and obtaining a hollow silica precursor from the hollow silica precursor dispersion and obtaining hollow silica particles from the hollow silica precursor.Type: ApplicationFiled: May 28, 2020Publication date: September 10, 2020Applicants: AGC Inc., AGC Si-Tech Co., Ltd.Inventors: Hiroyuki KAMIYA, Hyunji KIM, Toshiya MATSUBARA
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Publication number: 20170320051Abstract: To provide a porous silica having high alkali resistance; and a chromatographic carrier using such a porous silica. A porous silica comprising a phosphorus oxide component and a zirconium oxide component, wherein the amount of phosphorus atoms per unit specific surface area of the porous silica is from 1 ?mol/m2 to 25 ?mol/m2; and the amount of zirconium atoms per unit specific surface area of the porous silica is from 1 ?mol/m2 to 15 ?mol/m2. And, a chromatographic carrier which contains a ligand immobilized to such a porous silica.Type: ApplicationFiled: July 25, 2017Publication date: November 9, 2017Applicant: AGC SI-TECH CO., LTD.Inventors: YOUICHI KAYANO, RYOU NAKASHIMA, HIROYOSHI MIYAHARA
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Patent number: 9192914Abstract: To provide an affinity carrier with a low pressure loss and a large binding capacity even when the linear flow rate of a solution to be made to pass therethrough is high. Silica spheres, which satisfy the following conditions: (a) the average particle size is from 30 ?m to 40 ?m as measured by a laser light scattering method; (b) the ratio (D10/D90) of the particle size (D10) of smaller 10% cumulative volume to the particle size (D90) of 90% cumulative volume in a particle size distribution as measured by a Coulter counter method, is at most 1.50; and (c) the average pore size is from 85 nm to 115 nm and the pore volume is at least 1.5 mL/g, as measured by a mercury intrusion technique.Type: GrantFiled: April 25, 2014Date of Patent: November 24, 2015Assignee: AGC Si-Tech Co., Ltd.Inventors: Hiroyoshi Miyahara, Ryou Nakashima, Kenji Higashi
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Publication number: 20140235435Abstract: To provide an affinity carrier with a low pressure loss and a large binding capacity even when the linear flow rate of a solution to be made to pass therethrough is high. Silica spheres, which satisfy the following conditions: (a) the average particle size is from 30 ?m to 40 ?m as measured by a laser light scattering method; (b) the ratio (D10/D90) of the particle size (D10) of smaller 10% cumulative volume to the particle size (D90) of 90% cumulative volume in a particle size distribution as measured by a Coulter counter method, is at most 1.50; and (c) the average pore size is from 85 nm to 115 nm and the pore volume is at least 1.5 mL/g, as measured by a mercury intrusion technique.Type: ApplicationFiled: April 25, 2014Publication date: August 21, 2014Applicant: AGC SI-TECH CO., LTD.Inventors: Hiroyoshi MIYAHARA, Ryou NAKASHIMA, Kenji HIGASHI
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Publication number: 20140127113Abstract: To produce scaly silica particles in which formation of irregular particles is prevented. A process for producing scaly silica particles, which comprises a step of subjecting a silica powder containing silica agglomerates having scaly silica particles agglomerated, to acid treatment at a pH of at most 2, a step of subjecting the silica powder subjected to the acid treatment, to alkali treatment at a pH of at least 8 to deflocculate the silica agglomerates, and a step of wet disintegrating the silica powder subjected to the alkali treatment to obtain scaly silica particles.Type: ApplicationFiled: October 24, 2013Publication date: May 8, 2014Applicant: AGC Si-Tech Co., Ltd.Inventors: Takayoshi SASAKI, Ikuyo NOMURA, Shinnosuke ARIMITSU, Hiroyoshi MIYAHARA
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Patent number: 8603412Abstract: A microchannel structure is provided wherein supplied fluids are prevented from transuding via a lamination interface into channels for a mixture or reaction product. A method is further provided for producing an emulsion having a uniform particle size under a high pressure condition by using the microchannel structure. The microchannel structure comprises one or more layers having notches to constitute channels, laminated and pressed between a pair of frames having an outside communicating hole to constitute a channel, so as to form microchannels to mix/react fluids, channels to supply the fluids to the microchannels, and a channel to discharge the fluids from the microchannels, wherein a channel for discharging a transudation fluid is provided to recover a fluid having transuded at a lamination interface so as not to let it enter into the channels including the microchannels and discharge it to the outside.Type: GrantFiled: April 25, 2012Date of Patent: December 10, 2013Assignees: Asahi Glass Company, Limited, AGC Si-Tech Co., Ltd.Inventor: Hajime Katayama
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Publication number: 20120213686Abstract: A microchannel structure is provided wherein supplied fluids are prevented from transuding via a lamination interface into channels for a mixture or reaction product. A method is further provided for producing an emulsion having a uniform particle size under a high pressure condition by using the microchannel structure. The microchannel structure comprises one or more layers having notches to constitute channels, laminated and pressed between a pair of frames having an outside communicating hole to constitute a channel, so as to form microchannels to mix/react fluids, channels to supply the fluids to the microchannels, and a channel to discharge the fluids from the microchannels, wherein a channel for discharging a transudation fluid is provided to recover a fluid having transuded at a lamination interface so as not to let it enter into the channels including the microchannels and discharge it to the outside.Type: ApplicationFiled: April 25, 2012Publication date: August 23, 2012Applicants: AGC Si-Tech Co., Ltd., ASAHI GLASS COMPANY, LIMITEDInventor: Hajime KATAYAMA
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Publication number: 20080269358Abstract: To provide a stable water-repellent inorganic powder which is substantially free from re-dissolution of a silicon compound used for surface treatment whether an organic solvent is polar or non-polar. A water-repellent inorganic powder which is surface-treated with a silicon compound, wherein the silicon compound is one having a group reactive with the inorganic powder, and when the inorganic powder is dispersed in any of polar organic solvents and non-polar organic solvents, the retention of the silicon compound is at least 90%.Type: ApplicationFiled: June 27, 2008Publication date: October 30, 2008Applicant: AGC Si-Tech CO., LTD.Inventors: Masaki Inoue, Atsunari Fujii, Takayoshi Sasaki
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Publication number: 20080131597Abstract: To provide a process of treating particulates such as an inorganic powder or resin beads to impart water repellency, to effectively impart water repellency particularly to a porous inorganic powder or the like, without use of an organic solvent as a dispersion medium of a silicone oil. Water repellent particulates are produced by a first step of adding, to particulates, an aqueous emulsion of a silicon compound such as a silicone oil to apply surface treatment to the particulates with mixing and stirring in a dry state, and a second step of heating the treated particulates to bake the silicon compound on the surface of the particulates and to separate the aqueous medium in the emulsion. The aqueous emulsion of the silicon compound is preferably an aqueous emulsion of any one of methyl hydrogen silicone oil, dimethyl silicone oil, epoxy-modified silicone oil, amino-modified silicone oil, polyether-modified silicone oil and carboxyl-modified silicone oil.Type: ApplicationFiled: December 21, 2007Publication date: June 5, 2008Applicant: AGC Si-Tech CO., LTDInventors: Akihiro TAKEHARA, Takayoshi Sasaki, Masaki Inoue, Noriyuki Yoshihara