Title:
SURFACE-TREATED PRECIPITATED SILICA FOR AQUEOUS PAINT
Document Type and Number:
WIPO Patent Application WO/2021/100400
Kind Code:
A1
Abstract:
The present invention relates to a surface-treated precipitated silica for aqueous paint, comprising 0.5–5.0% of an ether-based ion surfactant on the surface of precipitated silica, wherein the surface-treated precipitated silica has an aluminum content in the range 0.30–1.00% by mass in Al2O3 equivalent, the volume-average particle diameter D50 measured by laser diffractometry is in the range 3.0–10.0 μm, and the ratio D90/D50 is 2.0 or less, where D90 is the particle diameter at which the cumulative value of the volume integral from the bottom of the granularity distribution, as measured by laser diffractometry, is 90%. With the present invention, a surface-treated silica can be provided that can be wetted in a short period of time without causing agglutination, even when added directly in powder form to an aqueous paint, and has good redispersibility even if the surface-treated silica precipitates over time.
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Inventors:
TANIMOTO HARUKA (JP)
NAKAGAMI HIDENORI (JP)
NAKAGAMI HIDENORI (JP)
Application Number:
PCT/JP2020/039659
Publication Date:
May 27, 2021
Filing Date:
October 22, 2020
Export Citation:
Assignee:
TOSOH SILICA CORP (JP)
International Classes:
C01B33/159; C09C1/28; C09C3/08; C09D7/42; C09D7/62; C09D201/00
Foreign References:
| JP2002201380A | 2002-07-19 | |||
| JP2003055611A | 2003-02-26 | |||
| JPH08217997A | 1996-08-27 | |||
| JP2018002928A | 2018-01-11 | |||
| JPH06316408A | 1994-11-15 | |||
| JP2002080794A | 2002-03-19 | |||
| JP2007112948A | 2007-05-10 | |||
| JPS569211A | 1981-01-30 | |||
| JPH0925440A | 1997-01-28 | |||
| JPS5350095A | 1978-05-08 |
Attorney, Agent or Firm:
SIKS & CO. (JP)
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