Title:
POROUS SILICA PARTICLES AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2023/191019
Kind Code:
A1
Abstract:
The present invention provides: porous silica particles which have balanced and adequate disintegratability, while having excellent disintegration uniformity; and a method for producing these porous silica particles. Porous silica particles according to the present invention have a network structure, and are elastically deformed to a breaking point when a compressive force, which increases at a rate of 0.001450 gf/sec, is applied thereto. The ratio f/d of the compressive force f (gf) at the breaking point to the amount of displacement d (µm) is 0.05 to 0.10. The porous silica particles have a pore volume of 0.4 to 1.3 cm3/g; the mode of the pore diameters is 2 to 50 nm; the total pore volume of the pores having a pore diameter that is within ±25% of the mode of the pore diameters is 40% or more of the total pore volume; the average shape factor is 0.90 to 1.00; the content ratio of the particles having a shape factor of less than 0.80 is 3.0% by number or less; and the average compressive strength is not less than 9.8 but less than 29.4 N/mm2.
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Inventors:
EGAMI MIKI (JP)
MIYAMOTO TAKUJI (JP)
MURAGUCHI RYO (JP)
MIYAMOTO TAKUJI (JP)
MURAGUCHI RYO (JP)
Application Number:
PCT/JP2023/013448
Publication Date:
October 05, 2023
Filing Date:
March 31, 2023
Export Citation:
Assignee:
JGC CATALYSTS & CHEMICALS LTD (JP)
International Classes:
C01B33/12; B24B37/00; C01B33/18; C09K3/14; H01L21/304
Foreign References:
| JP2020073436A | 2020-05-14 | |||
| JP2019036712A | 2019-03-07 | |||
| JP2015086102A | 2015-05-07 | |||
| JP2017001927A | 2017-01-05 | |||
| JP2013047180A | 2013-03-07 | |||
| JP2009137791A | 2009-06-25 |
Attorney, Agent or Firm:
OKUMACHI Tetsuyuki (JP)
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