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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 8889044 B1

PDFFull Text
Date of Patent:
Nov. 18, 2014

Filed:

Dec. 14, 2010

Method for producing mesoporous silica particles

Applicants:

Toshihiro Yano, Wakayama, JP;

Masaki Komatsu, Wakayama, JP;

Hiroji Hosokawa, Wakayama, JP;

Jun Yoshida, Wakayama, JP;

Inventors:

Toshihiro Yano, Wakayama, JP;

Masaki Komatsu, Wakayama, JP;

Hiroji Hosokawa, Wakayama, JP;

Jun Yoshida, Wakayama, JP;

Assignee:

Kao Corporation, Tokyo, JP;

Attorney:

Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Randy Gulakowski

Assistant Examiner:

Jeffrey Washville

Int. Cl.
CPC ...
B01J 13/00 (2006.01); C09D 5/00 (2006.01); C09D 7/00 (2006.01); C09D 7/12 (2006.01); C01B 37/02 (2006.01); C09C 1/30 (2006.01); C01B 33/18 (2006.01); B82Y 30/00 (2011.01); C08K 7/26 (2006.01); C08K 3/36 (2006.01);
U.S. Cl.
CPC ...
C09D 7/005 (2013.01); C01P 2002/72 (2013.01); C09D 7/1266 (2013.01); C01B 37/02 (2013.01); C01P 2004/64 (2013.01); C09C 1/3063 (2013.01); C09D 7/1216 (2013.01); C01P 2006/16 (2013.01); C01P 2004/34 (2013.01); C01B 33/18 (2013.01); C09D 7/1275 (2013.01); C01P 2004/62 (2013.01); C01P 2006/12 (2013.01); C01P 2002/70 (2013.01); C08K 7/26 (2013.01); C01P 2004/84 (2013.01); B82Y 30/00 (2013.01); C08K 3/36 (2013.01); Y10S 977/773 (2013.01); Y10S 977/89 (2013.01);
Abstract

The present invention relates to a method for producing mesoporous silica particles including a silica-containing outer shell portion with a mesoporous structure. The method includes the steps of: (I) pressurizing a mixed solution containing a hydrophobic organic compound, a surfactant, and an aqueous solvent by a high-pressure emulsification method so as to form an emulsion that includes emulsion droplets containing the hydrophobic organic compound; (II) adding a silica source to the emulsion so as to form a silica-containing outer shell portion with a mesoporous structure on a surface of the emulsion droplets, and precipitating composite silica particles including the outer shell portion and the emulsion droplets on an inner side relative to the outer shell portion; and (III) removing the emulsion droplets from the composite silica particles. According to the production method of the present invention, it is possible to produce easily mesoporous silica particles that have a small average particle size and include fewer coarse particles. Thus, the mesoporous silica particles produced by this method are useful in fields that handle a paint composition for an antireflection film and a coating film.

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