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Method for preparing organic particle

A technology of organic particles and organic materials, which is applied in the fields of organic dyes, chemical instruments and methods, and nanostructure manufacturing, and can solve problems such as changes in particle dispersion

Inactive Publication Date: 2008-06-04
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the particle size of the organic particles can be changed by this method, the dispersibility of the particles will also change

Method used

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  • Method for preparing organic particle
  • Method for preparing organic particle
  • Method for preparing organic particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] A pigment solution was prepared by dissolving 530 mg of a pigment (Pigment Red 254) and 8 ml of a 1 mol / L aqueous sodium hydroxide solution in 100 ml of 1-methyl-2-pyrrolidone. In addition, 1,000 ml of a solution containing dispersant A1 and 8 ml of 1 mol / L hydrochloric acid was prepared as a poor solvent. The amount of dispersant A1 is shown in Table 1. (In this table, the amount of the dispersant is represented by the concentration (mass %) which is the content of the dispersant in the solvent in which the dispersant is dissolved. The same applies to the following tables.)

[0110] [chemical formula 12]

[0111] Dispersant A1

[0112]

[0113] The pigment particle dispersion liquid was prepared by injecting the entirety of the pigment solution thus prepared into the poor solvent at a flow rate of 50 ml / min using a large-capacity non-pulsation pump NP-KX-500 manufactured by Nihon Seimitsu Kagaku Co., Ltd. At this time, the poor solvent was stirred at a speed of 50...

Embodiment 2

[0118] A pigment solution was prepared by dissolving 530 mg of a pigment (Pigment Red 254) and 8 ml of a 1 mol / L aqueous sodium hydroxide solution in 100 ml of 1-methyl-2-pyrrolidone. In addition, 1,000 ml of a solution containing sodium oleate and 8 ml of 1 mol / L hydrochloric acid was prepared as a poor solvent. The amount of sodium oleate is shown in Table 2.

[0119] The pigment particle dispersion liquid was prepared by injecting the entirety of the pigment solution thus prepared into the poor solvent at a flow rate of 50 ml / min using a large-capacity non-pulsation pump NP-KX-500 manufactured by Nihon Seimitsu Kagaku Co., Ltd. At this time, the poor solvent was stirred at a speed of 500 rpm with a GK-0222-10 Ramond stirrer manufactured by Fujisawa Pharmaceutical Co., Ltd., and the temperature was controlled at 1°C.

[0120] The evaluations of the primary particle size, Mv / Mn ratio, and dispersed state were performed in the same manner as in Example 1, respectively. The re...

Embodiment 3

[0124] Pigment solution was prepared by dissolving 530 mg of pigment (Pigment Red 254) and 8 ml of 1 mol / L aqueous sodium hydroxide solution and dispersant B1 in 100 ml of 1-methyl-2-pyrrolidone, wherein the amount of dispersant B1 was shown in Table 3.

[0125] [chemical formula 13]

[0126] Dispersant B1

[0127]

[0128] Separately prepare 1,000 ml of a solution containing 8 ml of 1 mol / L hydrochloric acid as a poor solvent.

[0129] The pigment particle dispersion liquid was prepared by injecting the entirety of the pigment solution thus prepared into the poor solvent at a flow rate of 50 ml / min using a large-capacity non-pulsation pump NP-KX-500 manufactured by Nihon Seimitsu Kagaku Co., Ltd. At this time, the poor solvent was stirred at a speed of 500 rpm with a GK-0222-10 Ramond stirrer manufactured by Fujisawa Pharmaceutical Co., Ltd., and the temperature was controlled at 1°C.

[0130] The evaluations of the primary particle size, Mv / Mn ratio, and dispersed stat...

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Abstract

Disclosed is a method for producing organic particles wherein a solution obtained by dissolving an organic material in a good solvent is mixed with a poor solvent for the organic material compatible with the good solvent for generating particles of the organic material. In this method for producing organic particles, at least one substance selected from the group consisting of anionic surfactants having 14 or more carbon atoms (dispersing agents A) and certain compounds having an azo group (dispersing agents B) is contained in a mixture liquid wherein the organic particles are generated.

Description

technical field [0001] The invention relates to a method for preparing organic particles. In particular, the present invention relates to a method for producing organic particles excellent in monodispersity and controllable in particle size. Furthermore, the present invention relates to a method of producing organic particles by a liquid phase method using a dispersant. Background technique [0002] In recent years, studies on particle size reduction have been conducted. In particular, much research is aimed at reducing the particle size to the nanometer size (for example, 10 nm to 100 nm), which is difficult to achieve by pulverization, precipitation, and other methods. In addition, the purpose of the research is not only to make the particles have nanometer order, but also to make them have good monodispersity (the term "monodispersity" used in this specification refers to the uniformity of dispersed particle diameters). [0003] Such nanoscale particles are different f...

Claims

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Application Information

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IPC IPC(8): B01J19/00C09B67/02B82B3/00C09B67/20
Inventor 泉泰之宫下阳介
Owner FUJIFILM CORP
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