PROCESS FOR PREPARING NANO-PARTICLE OF ORGANIC PIGMENT, AND NANO-PARTICLE POWDER OF ORGANIC PIGMENT, PIGMENT DISPERSION SUBSTANCE, COLORED PHOTOSENSITIVE RESIN COMPOSITION, INKJET INK, AND PHOTOSENSITIVE RESIN TRANSFER MATERIAL OBTAINED BY THE PROCESS, AND COLOR FILTER AND LIQUID CRYSTAL DISPLAY USING THEM

摘要

PROBLEM TO BE SOLVED: To provide a process for preparing nano-particles of an organic pigment, and a pigment dispersion substance comprising two or more kinds of organic pigments using a mixed solution or powder of the nano-particles of the pigment obtained by the process, which can maintain dispersion stability for a long period, and to provide inkjet ink, a colored photosensitive resin composition, and a photosensitive resin transfer material using the dispersion substance, and a color filter high in display quality having high contrast prepared by using them and a liquid crystal display provided with the same.

SOLUTION: In the process for preparing the nano-particles of the organic pigments, two or more organic pigment solutions in which two or more kinds of mutually different organic pigments are dissolved in each good solvent, and a solvent to be compatible with the each good solvent and to be a poor solvent to any of the two or more kinds of the organic pigments, are mixed. To prepare the two or more kinds of organic pigments as nano-metric size particles in the mixed solution, the two or more organic pigment solutions are simultaneously or successively mixed with the one poor solvent to be prepared as particles.

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