PIGMENT DISPERSION FOR COLOR FILTER

• Main Authors: TSURU ISAO, INADA KATSUHIKO, ITOI AKITO
• Format: Patent
• Language: English
• Published: 24.06.2013
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; 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; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PHYSICS; POLISHES; USE OF MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To provide a pigment dispersion for a color filter capable of forming a cured film excellent in contrast, a color composition for a color filter containing the pigment dispersion, and a method for producing the pigment dispersion for a color filter.SOLUTION: Provided are: [1] A pigment dispersion for a color filter that contains a diketopyrrolopyrrole pigment, a pigment dispersant, and an organic solvent such as propylene glycol monomethyl ether acetate, and in which the pigment dispersant is composed of a graft polymer containing a constitutional unit having an amido group in a main chain and containing a constitutional unit derived from methacrylic acid isopropyl in a side chain and a weight ratio [the main chain/the side chain] of the main chain to the side chain in the graft polymer ranges from 30/70 to 49/51; [2] a color composition for a color filter containing the pigment dispersion; and [3] a method for producing the pigment dispersion of [1].