公开(公告)号：US20240209210A1

公开(公告)日：2024-06-27

申请号：US18420860

申请日：2024-01-24

Applicant: AGC Inc. ,  AGC SI-TECH CO., LTD.

Inventor： Hiromichi KAMO ,  Hajime KATAYAMA ,  Kohta FUKUMOTO

IPC: C09C1/30 ,  C08K7/18

CPC classification number: C09C1/3027 ,  C08K7/18 ,  C01P2002/82 ,  C01P2004/03 ,  C01P2004/32 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/40 ,  C01P2006/80

Abstract: The present invention relates to a spherical silica powder, having a median diameter d50 of 0.5 μm to 20 μm, and a product A×d50, which is a product of a specific surface area A (m2/g) and the median diameter d50 (μm), of 2.7 μm·m2/g to 5.0 μm·m2/g. The spherical silica powder may have a dielectric loss tangent of 0.0020 or less at a frequency of 1 GHz.

公开(公告)号：US20200010684A1

公开(公告)日：2020-01-09

申请号：US16572975

申请日：2019-09-17

Applicant: AGC Inc.

Inventor： Hajime KATAYAMA ,  Hiroshi ARUGA

IPC: C09C1/00 ,  C08K3/38 ,  C08K9/06 ,  C08J3/20 ,  G02B5/20

Abstract: To provide a method for producing lanthanum hexaboride-containing composite particles which are capable of forming a formed product having sufficiently high transparency and which are excellent in weather resistance, by a simple operation without calcination treatment at high temperature, and a method for producing a formed product using it.A method for producing composite particles, which comprises: reacting at least one silica precursor selected from the group consisting of a tetraalkoxysilane, its hydrolysate and its condensate, in the presence of lanthanum hexaboride particles, a volatile base, water and an organic solvent to obtain a first reaction mixture, and reacting the first reaction mixture with at least one silicon compound selected from the group consisting of an amino-modified silicone, an alkylsilane and an aminosilane, or the silicon compound and the silica precursor added, to obtain a second reaction mixture containing lanthanum hexaboride-containing composite particles.

公开(公告)号：US20220396490A1

公开(公告)日：2022-12-15

申请号：US17892359

申请日：2022-08-22

Applicant: AGC Inc. ,  AGC SI-TECH CO., LTD.

Inventor： Hiromichi KAMO ,  Masashi KONDO ,  Hajime KATAYAMA

IPC: C01B33/18 ,  C09C1/30

Abstract: 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.

公开(公告)号：US20240308858A1

公开(公告)日：2024-09-19

申请号：US18675502

申请日：2024-05-28

Applicant: AGC Inc. ,  AGC SI-TECH CO., LTD.

Inventor： Hiromichi KAMO ,  Hajime KATAYAMA

IPC: C01B33/12 ,  C08K3/36

CPC classification number: C01B33/12 ,  C08K3/36 ,  C01P2002/86 ,  C01P2004/03 ,  C01P2004/34 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/40

Abstract: The present invention relates to hollow silica particles each including a shell layer that includes silica and having a space portion inside the shell layer, in which when A (g/cm3) is a particle density determined by density measurement with a dry pycnometer using argon gas and B (m2/g) is a BET specific surface area, the hollow silica particles have a product (A×B) of the particle density and the BET specific surface area of 1 m2/cm3 to 120 m2/cm3.

公开(公告)号：US20240122818A1

公开(公告)日：2024-04-18

申请号：US18397333

申请日：2023-12-27

Applicant: AGC Inc. ,  AGC SI-TECH CO., LTD.

Inventor： Hajime KATAYAMA ,  Masashi KONDO ,  Kohta FUKUMOTO ,  Yuriko TAKANO ,  Shinnosuke ARIMITSU ,  Takeshi MURAKAMI ,  Kenji HIGASHI ,  Daisuke YAMAZUMI

IPC: A61K8/02 ,  A61K8/25 ,  A61Q17/04 ,  C01B33/193 ,  C09C1/30 ,  C09C3/08

CPC classification number: A61K8/0279 ,  A61K8/25 ,  A61Q17/04 ,  C01B33/193 ,  C09C1/3063 ,  C09C3/08 ,  C01P2004/02 ,  C01P2004/03 ,  C01P2004/34 ,  C01P2004/61 ,  C01P2006/19 ,  C01P2006/63

Abstract: 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 μm to 500 μm 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.

公开(公告)号：US20230302431A1

公开(公告)日：2023-09-28

申请号：US18316348

申请日：2023-05-12

Applicant: AGC Inc. ,  AGC SI-TECH CO., LTD.

Inventor： Eisuke MUROTANI ,  Ryohei KOGUCHI ,  Taku YAMADA ,  Katsumasa NAKAHARA ,  Hajime KATAYAMA ,  Masaki INOUE

IPC: B01J20/32 ,  B01J20/28 ,  B01J20/10

CPC classification number: B01J20/3259 ,  B01J20/10 ,  B01J20/28004 ,  B01J20/28019 ,  B01J20/28061 ,  B01J20/28076 ,  B01J20/28083 ,  B01J20/28085 ,  B01J20/3204

Abstract: 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.

公开(公告)号：US20250107977A1

公开(公告)日：2025-04-03

申请号：US18977587

申请日：2024-12-11

Applicant: AGC Inc. ,  AGC SI-TECH CO., LTD.

Inventor： Shinnosuke ARIMITSU ,  Hajime KATAYAMA ,  Masashi KONDO ,  Kohta FUKUMOTO ,  Hiromichi KAMO ,  Daisuke YAMAZUMI

IPC: A61K8/25 ,  A61K8/02 ,  A61Q1/12

Abstract: The present invention relates to a silica powder for a cosmetic material, including: amorphous silica particles, in which the silica particles have an average circularity of 0.75 or more, and the silica powder satisfies at least one of the following conditions (1) to (3), (1) a degree of aggregation of 60% or more, (2) an angle of difference between an angle of repose and an angle of collapse of 15 degrees or less, or (3) a degree of dispersion of 50% or less.

公开(公告)号：US20250100890A1

公开(公告)日：2025-03-27

申请号：US18977636

申请日：2024-12-11

Applicant: AGC Inc. ,  AGC SI-TECH CO., LTD.

Inventor： Hajime KATAYAMA ,  Kohta FUKUMOTO ,  Masashi KONDO ,  Hiromichi KAMO ,  Shinnosuke ARIMITSU

IPC: C01B33/12

Abstract: The present invention relates to a method for producing a spherical silica powder, the method including, firing a spherical and porous silica precursor in a state where particles of the silica precursor are in contact with each other, in which the silica precursor has a sodium concentration of 1 ppm by mass to 300 ppm by mass and assuming the sodium concentration as x (ppm by mass) and a heat treatment temperature as y (° C.), the silica precursor is subjected to the heat treatment at a temperature satisfying −0.97x+1180

公开(公告)号：US20220411275A1

公开(公告)日：2022-12-29

申请号：US17891320

申请日：2022-08-19

Applicant: AGC Inc. ,  AGC SI-TECH CO., LTD.

Inventor： Toshiya MATSUBARA ,  Hyunji KIM ,  Hajime KATAYAMA ,  Yusuke ARAI

IPC: C01B33/18

Abstract: 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.