METHOD FOR PRODUCING NANOPARTICLES

WIPO Patent Application WO/2011/096401

A1

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.

ENOMURA Masakazu (2-16, Technostage 2-chome, Izumi-sh, Osaka 44, 〒5941144, JP)

JP2011/052053

August 11, 2011

February 01, 2011

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M. Technique Co., Ltd. (2-16, Technostage 2-chome Izumi-sh, Osaka 44, 〒5941144, JP)
エム・テクニック株式会社 (〒44 大阪府和泉市テクノステージ二丁目２番１６号 Osaka, 〒5941144, JP)

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

SAMEJIMA Takenobu (Shinmachi Bldg. 905, 1-2-13 Shinmachi, Nishi-k, Osaka 13, 〒5500013, JP)

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