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Title:
MICROPARTICLE, PROCESS FOR PRODUCING MICROPARTICLE, AND, LOADED WITH THE MICROPARTICLE, RESIN COMPOSITION AND OPTICAL FILM
Document Type and Number:
WIPO Patent Application WO/2008/023648
Kind Code:
A1
Abstract:
Microparticles having the content of coarse particles exceeding the average particle diameter reduced to a low level; a process for producing such microparticles; and a resin composition containing the microparticles. The microparticles are characterized in that the content of coarse particles with a diameter of twice or more the average particle diameter is 1000 particles/0.5g or less. The process for producing the microparticles comprises the steps of wet classification of a microparticle dispersion liquid of 0.5 to 50 mass% solid content and 0.5 to 20 mass B-viscosity; drying and pulverization of the microparticles after the wet classification to thereby obtain powdery microparticles of 0.05 to 2 mass% water content; and dry classification of the powdery microparticles.

Inventors:
SHIMIZU KENJI (JP)
TOMINAGA MIWAKO (JP)
TAKASAKI SHINJI (JP)
HORO SHIN-ICHI (JP)
Application Number:
PCT/JP2007/066053
Publication Date:
February 28, 2008
Filing Date:
August 17, 2007
Export Citation:
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Assignee:
NIPPON CATALYTIC CHEM IND (JP)
SHIMIZU KENJI (JP)
TOMINAGA MIWAKO (JP)
TAKASAKI SHINJI (JP)
HORO SHIN-ICHI (JP)
International Classes:
C08J3/12; B01J19/00; B03B5/00; B03B7/00; B07B4/00; B07B7/00; C08F283/12; C08J7/04; C08L51/08; C08L61/20; C09D151/08; C09D161/20
Foreign References:
JP2002166228A2002-06-11
JP2004307644A2004-11-04
JP2004204164A2004-07-22
JP2005309399A2005-11-04
JP2004191956A2004-07-08
Attorney, Agent or Firm:
UEKI, Kyuichi et al. (1-16 Dojima 2-chome, Kita-ku, Osaka-sh, Osaka 03, JP)
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