Invention Grant
- Patent Title: Method for producing hollow silica particles
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Application No.: US16885487Application Date: 2020-05-28
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Publication No.: US11608273B2Publication Date: 2023-03-21
- Inventor: Hiroyuki Kamiya , Hyunji Kim , Toshiya Matsubara
- Applicant: AGC Inc. , AGC Si-Tech Co., Ltd.
- Applicant Address: JP Chiyoda-ku; JP Kitakyushu
- Assignee: AGC Inc.,AGC Si-Tech Co., Ltd.
- Current Assignee: AGC Inc.,AGC Si-Tech Co., Ltd.
- Current Assignee Address: JP Chiyoda-ku; JP Kitakyushu
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JPJP2017-248972 20171226
- Main IPC: C01B33/193
- IPC: C01B33/193 ; B01J13/08

Abstract:
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.
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.
Public/Granted literature
- US20200283300A1 METHOD FOR PRODUCING HOLLOW SILICA PARTICLES Public/Granted day:2020-09-10
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