Title:
METHOD FOR PRODUCING SURFACE-TREATED SILICA POWDER
Document Type and Number:
WIPO Patent Application WO/2021/215285
Kind Code:
A1
Abstract:
Provided is a method for producing a surface-treated silica powder that has exceptional gap permeability and that can yield a resin composition having a low viscosity when used as a resin filler such as that in a semiconductor sealant, etc. A surface treatment agent is brought into contact with a silica powder in which (1) the cumulative 50% mass diameter D50 in a mass-based grain size distribution obtained by centrifugal sedimentation is 300 nm to 500 nm (inclusive) (preferably 330 nm to 400 nm (inclusive)), (2) the loose bulk density is 250 kg/m3 to 400 kg/m3 (inclusive) (preferably 270 kg/m3 to 350 kg/m3 (inclusive)), and (3) \{(D90 – D50)/D50\}×100 is 30% to 45% (inclusive) (preferably 33% to 42% (inclusive)), whereby the surface of the silica powder is modified, to produce surface-treated silica powder.
Inventors:
HAMASAKA GO (JP)
SAIKI KEIJI (JP)
HU HAO (JP)
SAIKI KEIJI (JP)
HU HAO (JP)
Application Number:
PCT/JP2021/015132
Publication Date:
October 28, 2021
Filing Date:
April 12, 2021
Export Citation:
Assignee:
TOKUYAMA CORP (JP)
International Classes:
C01B33/18; C08K9/06; C08L101/00
Foreign References:
| JP2018070397A | 2018-05-10 | |||
| JP2002003213A | 2002-01-09 | |||
| JP2014028738A | 2014-02-13 | |||
| JP2006096599A | 2006-04-13 | |||
| JP2017041471A | 2017-02-23 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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