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 block polymer that contains a block portion comprising a repeating unit having a tertiary amine represented by the following formula (I) and a block portion comprising a repeating unit represented by the following formula (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 in the formula (I), R1 is a hydrogen atom or a methyl group;
• “A” is a direct bond or a divalent linking group;
• R2 is an alkylene group having 1 to 8 carbon atoms or a divalent organic group described by —[CH(R6)—CH(R7)—O]x—CH(R6)—CH(R7)— or —[(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 R6 and R7 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;
• in the formula (III), R10 is a hydrogen atom or a methyl group;
• “A” is a direct bond or a divalent linking group;
• R11 is one selected from the group consisting of an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group and a monovalent group described by —[CH(R12)—CH(R13)—O]x—R14 or —[(CH2)y—O]z—R14;
• each of R12 and R13 is independently a hydrogen atom or a methyl group;
• R14 is one selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group and a monovalent group described by —CHO, —CH2CHO or —CH2COOR15;
• R15 is a hydrogen atom or a straight-chain, branched or cyclic alkyl group having 1 to 5 carbon atoms;
• “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.