PIGMENT DISPERSION COMPOSITION AND COLOR RESIST INK

摘要

PROBLEM TO BE SOLVED: To obtain the above composition excellent in fine dispersibility, dispersion stability and high in light transmittance, useful for producing a color filter for a liquid crystal excellent in brightness, chroma and contrast, comprising an organic pigment, an organic solvent and a specified finely dispersing component. SOLUTION: This pigment dispersion composition comprises (A) an organic pigment, (B) an organic solvent and (C) a finely dispersing component composed of (C1 ) an acidic derivative of an organic pigment and (C2 ) a cationic ctenoid graft polymer containing a cationic functional group on a trunk polymer part [e.g. a polymer composed of (C2 ') a trunk polymer part containing an amino group and (C2 ") a branch polymer part soluble in an organic solvent) obtained by grafting two or more molecules of the component (C2 ") to one molecule of the component (C2 ')].