METHOD FOR PRODUCING NANOPARTICLES

Title:

METHOD FOR PRODUCING NANOPARTICLES

Document Type and Number:

WIPO Patent Application WO/2011/096401

Kind Code:

A1

Abstract:

Disclosed is a method for producing nanoparticles. Specifically disclosed is a method for producing nanoparticles by depositing a diketopyrrolopyrrole pigment, wherein the deposition of the diketopyrrolopyrrole pigment and the crystal transition thereof to the α-form are conducted substantially in a single step to thereby deposit α-form diketopyrrolopyrrole pigment nanoparticles having a high crystallinity. A method for producing nanoparticles which comprises mixing a solution of a diketopyrrolopyrrole pigment dissolved in a solvent with an alcoholic solvent containing an alcohol compound solvent in a thin-film fluid formed between at least two treating faces (1, 2), which are located opposite to each other in such a manner that these treatment faces can be moved toward and away from each other and at least one of which is rotatable against the other treatment face, thereby depositing α-form diketopyrrolopyrrole pigment nanoparticles. This method for producing nanoparticles is characterized in that at least one of the diketopyrrolopyrrole pigment solution and the alcoholic solvent contains an acidic substance.

Inventors:

ENOMURA MASAKAZU (JP)

Application Number:

PCT/JP2011/052053

Publication Date:

August 11, 2011

Filing Date:

February 01, 2011

Export Citation:

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Assignee:

M TECH CO LTD (JP)
ENOMURA MASAKAZU (JP)

International Classes:

C09B67/02; B02C7/17; B02C23/06; C09B57/00; C09B67/14; C09B67/48; B01D9/02

Domestic Patent References:

WO2009008388A1	2009-01-15
WO2009038008A1	2009-03-26
WO2008044519A1	2008-04-17

Foreign References:

JPH09221616A	1997-08-26
JP2001264528A	2001-09-26
JP2004049957A	2004-02-19
JP2009008388A	2009-01-15
JP2008044519A	2008-02-28
JP2009081930A	2009-04-16
JP2008024873A	2008-02-07

Other References: