FINE PARTICLES OF A WATER-INSOLUBLE COMPOUND, DISPERSION OF SAME AND PROCESS FOR PRODUCTION THEREOF

摘要

Fine particles of a water-insoluble compound which are formed either by mixing a solution of a water-insoluble compound in a good solvent with a poor solvent with a dispersant dissolved in the good solvent and/or the poor solvent or by preparing a solution of a dispersant in a good solvent separately and mixing this solution with both a solution of a water-insoluble compound in a good solvent and a poor solvent and which contain the dispersant embedded therein, characterized in that the dispersant is embedded in the fine particles in an amount of 5 to 200mass% relative to the mass of the water-insoluble compound; and fine particles of a water-insoluble compound which are constituted of a water-insoluble compound and a dispersant, characterized in that at least 80mass% of the dispersant embedded in the fine particles is unevenly distributed in outside regions spreading from the surfaces of the fine particles to depths of 50% of the radii thereof.