RED COLOR RESIST INK AND PIGMENT DISPERSION

PROBLEM TO BE SOLVED: To provide a red color resist ink which can give a high level of lightness and chroma when used in a color filter for a liquid crystal display, and a pigment dispersion used therein. SOLUTION: In the red color resist ink obtained by dispersing a red pigment dispersion into a ph...

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Hauptverfasser:	YOKOYAMA NAOKI, ITAHARA SHUNEI, FUJISHIRO KOICHI
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMISTRY DYES LAKES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS PHYSICS POLISHES
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a red color resist ink which can give a high level of lightness and chroma when used in a color filter for a liquid crystal display, and a pigment dispersion used therein. SOLUTION: In the red color resist ink obtained by dispersing a red pigment dispersion into a photosensitive resin composition, (D) a diketopyrrolopyrrole pigment and (E) a diketopyrrolopyrrole-sulfonic acid derivative or (A) a diketopyrrolopyrrole pigment whose surface has been treated with a diketopyrrolopyrrole-sulfonic acid derivative is used as the pigment component of the pigment dispersion, and (B) a graft polymer obtained by reacting (a) a poly(lower alkyleneimine) or (b) a polyallylamine with (α) a polyester having a free carboxylic group, (β) a polyamide or (γ) a polyesteramide to form an amide or a salt is used as a dispersant for dispersing this pigment component, and (C) a sulfonic acid derivative of an organic pigment is used as the crystal growth inhibitor. COPYRIGHT: (C)2010,JPO&INPIT