Non-aqueous dispersant, color material dispersion liquid for color filter, color filter, liquid crystal display device and organic light-emitting display device

A color material dispersion liquid for a color filter, comprising:

• a color material (A), a dispersant (B), and a solvent (C),
• wherein the color material (A) contains a metal lake color material of a basic dye, and
• wherein the dispersant (B) is a graft copolymer comprising a constitutional unit represented by the following general formula (II) and at least one kind selected from the group consisting of a constitutional unit represented by the following general formula (I) and a constitutional unit represented by the following general formula (I′), or a block copolymer comprising a block portion containing a constitutional unit represented by the following general formula (III) and a block portion containing at least one kind selected from the group consisting of a constitutional unit represented by the following general formula (I) and a constitutional unit represented by the following general formula (I′):
• in the general formulae (I) and (I′), L1 is a direct bond or a divalent linking group;
• R1 is a hydrogen atom or a methyl group;
• R2 is a hydrocarbon group or a monovalent group represented by —[CH(R6)—CH(R7)—O]x1—R8 or —[(CH2)y1—O]z1—R8;
• R6 and R7 are each independently a hydrogen atom or a methyl group;
• R8 is a hydrogen atom, a hydrocarbon group or a monovalent group represented by —CHO, —CH2CHO, —CO—CH═CH2, —CO—C(CH3)═CH, or —CH2COOR9;
• R9 is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms;
• when R2 or R8 is a hydrocarbon group, the hydrocarbon group of R2 or R8 can have a substituent group;
• x1 is an integer of 1 to 18;
• y1 is an integer of 1 to 5;
• and z1 is an integer of 1 to 18;
• in the general formula (I′), X+ is an organic cation;
• in the general formula (II), L2 is a direct bond or a divalent linking group;
• R3 is a hydrogen atom or a methyl group;
• and “Polymer” is a polymer chain having at least one kind selected from the group consisting of a constitutional unit represented by the following general formula (IV) and a constitutional unit represented by the following general formula (V);
• in the general formula (III), R4 is a hydrogen atom or a methyl group;
• R5 is a hydrocarbon group, or a monovalent group represented by —[CH(R10)—CH(R11)—O]x2—R12, —[(CH2)y2—O]z2—R12, —[CO—(CH2)y2—O]z2—R12, —CO—O—R12′ or —O—CO— R12″;
• R10 and R11 are each independently a hydrogen atom or a methyl group;
• R12 is a hydrogen atom, a hydrocarbon group or a monovalent group represented by a —CHO, —CH2CHO or —CH2COOR13;
• R12′ is a hydrocarbon group, or a monovalent group represented by —[CH(R10)—CH(R11)—O]x2′—R12, —[(CH2)2—O]z2′—R12, or —[CO—(CH2)y2′—O]z2′—R12;
• R12″ is an alkyl group having 1 to 18 carbon atoms;
• R13 is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms;
• when R5, R12, or R12′ is a hydrocarbon group, the hydrocarbon groups of R5, R12, or R12′ can have a substituent group each;
• x2 and x2′ are each an integer of 1 to 18;
• y2 and y2′ are each an integer of 1 to 5;
• and z2 and z2′ are each an integer of 1 to 18:
• in the general formulae (IV) and (V), R14 is a hydrogen atom or a methyl group;
• R15 is a hydrocarbon group, or a monovalent group represented by —[CH(R16)—CH(R17)—O]x3—R18, [(CH2)y3—O]z3—R18, —[CO—(CH2)y3—O]z3—R18, —CO—O—R19 or —O—CO—R20;
• R16 and R17 are each independently a hydrogen atom or a methyl group;
• R18 is a hydrogen atom, a hydrocarbon group or a monovalent group represented by —CHO, —CH2CHO or —CH2COOR21;
• R19 is a hydrocarbon group, or a monovalent group represented by —[CH(R16)—CH(R17)—O]x4—R18, —[(CH2)y4—O]z4—R18 or —[CO—(CH2)y4—O]z4—R18;
• R20 is an alkyl group having 1 to 18 carbon atoms;
• R21 is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms;
• when R15, R18, or R19 are a hydrocarbon group, the hydrocarbon group of R15, R18, or R19 can have a substituent group;
• m is an integer of 1 to 5;
• n and n′ are each an integer of 5 to 200;
• x3 and x4 are each an integer of 1 to 18;
• y3 and y4 are each an integer of 1 to 5;
• and z3 and z4 are each an integer of 1 to 18.

A color filter comprising at least a transparent substrate and color layers disposed on the transparent substrate,

• wherein at least one of the color layers contains a color material (A), and a dispersant (B),
• wherein the color material (A) contains a metal lake color material of a basic dye, and
• wherein the dispersant (B) is a graft copolymer comprising a constitutional unit represented by the following general formula (II) and at least one kind selected from the group consisting of a constitutional unit represented by the following general formula (I) and a constitutional unit represented by the following general formula (I′), or a block copolymer comprising a block portion containing a constitutional unit represented by the following general formula (III) and a block portion containing at least one kind selected from the group consisting of a constitutional unit represented by the following general formula (I) and a constitutional unit represented by the following general formula (I′):
• in the general formulae (I) and (I′), L1 is a direct bond or a divalent linking group;
• R1 is a hydrogen atom or a methyl group;
• R2 is a hydrocarbon group or a monovalent group represented by —[CH(R6)—CH(R7)—O]x1—R8 or —[(CH2)y1—O]z1—R8;
• R6 and R7 are each independently a hydrogen atom or a methyl group;
• R8 is a hydrogen atom, a hydrocarbon group or a monovalent group represented by —CHO, —CH2CHO, —CO—CH═CH2, —CO—C(CH3)═CH, or —CH2COOR9;
• R9 is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms;
• when R2 or R8 is a hydrocarbon group, the hydrocarbon group of R2 or R8 can have a substituent group;
• x1 is an integer of 1 to 18;
• y1 is an integer of 1 to 5;
• and z1 is an integer of 1 to 18;
• in the general formula (I′), X+ is an organic cation;
• in the general formula (II), L2 is a direct bond or a divalent linking group;
• R3 is a hydrogen atom or a methyl group;
• and “Polymer” is a polymer chain having at least one kind selected from the group consisting of a constitutional unit represented by the following general formula (IV) and a constitutional unit represented by the following general formula (V);
• in the general formula (III), R4 is a hydrogen atom or a methyl group;
• R5 is a hydrocarbon group, or a monovalent group represented by —[CH(R10)—CH(R11)—O]x2—R12, —[(CH2)y2—O]z2—R12, —[CO—(CH2)y2—O]z2—R12, —CO—O—R12 or —O—CO— R12′;
• R10 and R11 are each independently a hydrogen atom or a methyl group;
• R12 is a hydrogen atom, a hydrocarbon group or a monovalent group represented by a —CHO, —CH2CHO or —CH2COOR13;
• R12′ is a hydrocarbon group, or a monovalent group represented by —[CH(R10)—CH(R11)—O]x2′—R12, —[(CH2)y2—O]z2′—R12, or —[CO—(CH2)y2′—O]z2′—R12;
• R12″ is an alkyl group having 1 to 18 carbon atoms;
• R13 is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms;
• when R5, R12, or R12′ is a hydrocarbon group, the hydrocarbon groups of R5, R12, or R12′ can have a substituent group each;
• x2 and x2′ are each an integer of 1 to 18;
• y2 and y2′ are each an integer of 1 to 5;
• and z2 and z2′ are each an integer of 1 to 18:
• in the general formulae (IV) and (V), R14 is a hydrogen atom or a methyl group;
• R15 is a hydrocarbon group, or a monovalent group represented by —[CH(R16)—CH(R17)—O]x3—R18—[(CH2)y3—O]z3—R18, —[CO—(CH2)y3—O]z3—R18, —CO—O—R19 or —O—CO—R20;
• R16 and R17 are each independently a hydrogen atom or a methyl group;
• R18 is a hydrogen atom, a hydrocarbon group or a monovalent group represented by —CHO, —CH2CHO or —CH2COOR21;
• R19 is a hydrocarbon group, or a monovalent group represented by —[CH(R16)—CH(R17)—O]x4—R8, —[(CH2)y4—O]z4—R18 or —[CO—(CH2)y4—O]z4—R18;
• R20 is an alkyl group having 1 to 18 carbon atoms;
• R21 is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms;
• when R15, R18, or R19 are a hydrocarbon group, the hydrocarbon group of R15, R18, or R19 can have a substituent group;
• m is an integer of 1 to 5;
• n and n′ are each an integer of 5 to 200;
• x3 and x4 are each an integer of 1 to 18;
• y3 and y4 are each an integer of 1 to 5;
• and z3 and z4 are each an integer of 1 to 18.