Dye dispersion liquid, photosensitive resin composition for color filters, color filter, liquid crystal display device and organic light emitting display device

A dye dispersion liquid comprising a dye (A), a dispersant (B) and a solvent (C), the dye (A) being dispersed in the solvent (C) by the dispersant (B), wherein the dye (A) is a dye having a sulfonic acid group;

• the dispersant (B) is a graft copolymer having an amine value (b) of 30 mg KOH/g or more and comprising a monomer and a polymerizable oligomer as copolymerizable components, the monomer having a tertiary amine and an ethylenically unsaturated double bond and being represented by the following formula (I′), and the polymerizable oligomer comprising a polymer chain and at a terminal thereof a group having an ethylenically unsaturated double bond, the polymer chain having at least one of the repeating units represented by the following general formulae (II) and (III);
• the solvent (C) is a solvent having a solubility of the dye (A) of 0.2 (g/100 g solvent) or less at 23° C.;
• and a micelle is formed by an acid-base interaction between the tertiary amine of the dispersant (B) and the sulfonic acid group of the dye (A):
• wherein R1 is a hydrogen atom or a methyl group;
• A is a direct bond or a divalent linking group;
• R2 is one selected from the group consisting of an alkylene group having 1 to 8 carbon atoms and divalent organic groups represented by —[CH(R5)—CH(R6)—O]x—CH(R5)—CH(R6)— and —[(CH2)y—O]z—(CH2)y—;
• each of R3 and R4 is independently a chain and/or cyclic hydrocarbon group which can be substituted, or R3 and R4 are bound to each other to form a cyclic structure;
• each of R5 and R6 is independently a hydrogen atom or a methyl group;
• “x” is an integer of 1 to 18;
• “y” is an integer of 1 to 5;
• and “z” is an integer of 1 to 18, and
• wherein R7 is a hydrogen atom or a methyl group;
• R9 is one selected from the group consisting of an alkyl group having 1 to 18 carbon atoms, a benzyl group, a phenyl group, a biphenyl group, a cyano group and monovalent groups described by —[CH(R9)—CH(R10)—O]x—R11, —[(CH2)y—O]z—R11—, —[CO—(CH2)y—O]z—R11—, —CO—O—R12 and —O—CO—R13;
• each of R9 and R10 is independently a hydrogen atom or a methyl group;
• R11 is one selected from the group consisting of an alkyl group having 1 to 18 group having 1 to 18 carbon atoms, a benzyl group, a phenyl group, a biphenyl group, and monovalent groups described by —CHO, —CH2CHO and —CH2COOR14;
• R12 is one selected from the group consisting of an alkyl group having 1 to 18 carbon atoms, a benzyl group, a phenyl group, a biphenyl group, a cyano group and monovalent groups described by —[CH(R9)—CH(R10)—O]x—R11—, —[(CH2)y—O]z—R11 and —[CO—(CH2)y—O]z—R11;
• R13 is an alkyl group having 1 to 18 carbon atoms;
• R14 is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms;
• “m” is an integer of 1 to 5;
• “n” and “n′” are each an integer of 5 to 200;
• “x” is an integer of 1 to 18;
• “y” is an integer of 1 to 5;
• and “z” is an integer of 1 to 18.