Title:
METHOD FOR PRODUCING SPHERICAL POLYMETHYLPHENYLSILSESQUIOXANE PARTICLES
Document Type and Number:
WIPO Patent Application WO/2017/135045
Kind Code:
A1
Abstract:
This method for producing spherical polymethylphenylsilsesquioxane particles having a volume average particle size of 1-5 μm, includes: (i) a step for adding methyltrimethoxysilane to water having a pH of 4.0-7.0, and allowing the solution to undergo a hydrolysis reaction, to obtain a transparent aqueous solution; (ii) a step for adding phenyltrimethoxysilane to the aqueous solution obtained in step (i), and allowing the solution to undergo a hydrolysis reaction, to obtain a transparent aqueous silane solution; (iii) a step for adjusting the temperature of the aqueous solution obtained in step (ii) to 0-15°C, adding, to the aqueous solution, an alkaline substance or an aqueous solution in which the alkaline substance is dissolved, and stirring and mixing the solution, to obtain a mixture solution; and (iv) a step for allowing the mixture solution obtained in step (iii) to stand still so that polymethylphenylsilsesquioxane particles precipitate.
Inventors:
INOKUCHI YOSHINORI (JP)
Application Number:
PCT/JP2017/001700
Publication Date:
August 10, 2017
Filing Date:
January 19, 2017
Export Citation:
Assignee:
SHINETSU CHEMICAL CO (JP)
International Classes:
C08G77/06
Domestic Patent References:
| WO2008047654A1 | 2008-04-24 |
Foreign References:
| JP2003335860A | 2003-11-28 | |||
| JP2000345044A | 2000-12-12 | |||
| JPH04202325A | 1992-07-23 |
Attorney, Agent or Firm:
PATENT PROFESSIONAL CORPORATION EI-MEI PATENT OFFICE (JP)
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