Coloring composition for color filter and color filter

A coloring composition, color filter technology, applied in the direction of instruments, filters, static indicators, etc., can solve the problem that the undissolved matter, light-shielding property, electrical characteristic light transmittance of the coloring resin composition that is easy to remain cannot be all Satisfaction, low light transmittance in the near-infrared region, etc.

Active Publication Date: 2011-12-14
TOYO INK SC HOLD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similar to color resists, in the coloring composition for black matrices, there is also the following problem: since the addition amount of the dispersant tends to be increased in order to obtain dispersion stability, the solubility to the developer is deteriorated, and it cannot be used. Develop within a specified time; or even if it can be developed, the undissolved matter of the colored resin composition is likely to remain in the non-pixel portion after development
Therefore, carbon black, which has been mainly used as a BM material in the past, not only exhibits a high dielectric constant and lacks insulation, but also has a low light transmittance in the near-infrared region, so it is difficult to calibrate and it is difficult to use it in the BOA method. LCD panel
[0020] As a method for solving such a problem, a method of combining carbon black and at least one organic pigment (refer to Patent Document 6), and a method of providing light-shielding properties by combining only an organic pigment without using carbon black (refer to Patent Document 6) are disclosed. 7, 8), a method using carbon black and a perylene-based black pigment as a black organic pigment (see Patent Documents 9 to 11), etc., but the light-shielding property of the black matrix member, the electrical characteristics, and the mask calibration operation. Sufficient light transmittance in the near-infrared region cannot be fully satisfied

Method used

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  • Coloring composition for color filter and color filter
  • Coloring composition for color filter and color filter
  • Coloring composition for color filter and color filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0347] (Pigment Dispersion (D-1))

[0348] After stirring and mixing the following mixture evenly, use zirconia beads with a diameter of 0.5 mm, disperse it with an Eiger mill ("MINI MODEL M-250MKII" manufactured by Eiger Japan Co., Ltd.) for 3 hours, and filter it with a 5.0 μm filter. Prepare pigment dispersion (DP-11).

[0349] Green pigment PG-1: 10.0 parts

[0350] Acrylic resin solution 1:35.0 parts

[0351] Propylene glycol monomethyl ether acetate (PGMAC): 49.0 parts

[0352] Resin type dispersant solution C (dispersant C): 6.0 parts

Embodiment 2～14

[0353] [Examples 2-14, Comparative Examples 1-16]

[0354] Hereinafter, pigment dispersions (D-2 to 30) were prepared in the same manner as the pigment dispersion (D-1) except that the pigments and pigment derivatives were changed to the compositions and compounding amounts shown in Table 3 and Table 4.

[0355] table 3

[0356]

[0357] Table 4

[0358]

[0359]

[0360] The viscosity characteristics, contrast ratio (CR) or optical density (OD) of the obtained pigment dispersion were evaluated by the following methods. The results are shown in Tables 5 and 6.

[0361] (viscosity characteristics)

[0362] Viscosity of the pigment dispersion The initial viscosity at 25° C. was measured using an E-type viscometer (“ELD-type viscometer” manufactured by Toki Sangyo Co., Ltd.). Moreover, 25 g of this pigment dispersion was left still at 40 degreeC for 7 days in the airtight state in the glass container, and the viscosity was measured by the method similar to the above, ...

Embodiment 15

[0390] (Photosensitive coloring composition (R-1))

[0391] After stirring and mixing the following mixture uniformly, it filtered through the filter of 1.0 micrometers, and obtained the photosensitive coloring composition (R-1).

[0392] (pigment dispersion) (total 50 parts)

[0393] Pigment dispersion 1: Pigment dispersion (D-1): 30.0 parts

[0394] Pigment dispersion 2: Pigment dispersion (D-6): 20.0 parts

[0395] Acrylic resin solution 2: 10.6 parts

[0396] Trimethylolpropane triacrylate: 4.2 parts ("NK ester ATMPT" manufactured by Shin Nakamura Chemical Co., Ltd.)

[0397] Photopolymerization initiator ("IRGACURE 907" manufactured by Ciba Specialty Chemicals): 1.2 parts

[0398] Sensitizer (“EAB-F” manufactured by Hodogaya Chemical Co.): 0.4 parts

[0399] Silane coupling agent ("KBM-803" manufactured by Shin-Etsu Chemical Co., Ltd.): 0.4 parts

[0400] Ethylene glycol monomethyl ether acetate: 23.2 parts

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Abstract

PURPOSE: A coloring composition for color filter has excellent dispersibility, mobility stability, and developability, and provided to form the black matrix pattern with high optical concentration and the color filter segment of high contrast ratio. CONSTITUTION: A coloring composition for color filter contains a coloring agent and a resin type dispersing agent and a solvent. The average diameter of the coloring agent is 20-50nm, and the coloring agent contains a pigment of which aspect ratio is 1:1-1:3.5. The resin type dispersing agent is AB block copolymer or B-A-B block copolymer(A block has solvent-philicity, and B block contains functional group including nitrogen atom), and contains acrylic block copolymer of which amine value is 10-99mgKOH/g or less(on the basis of solid shape).

Description

technical field [0001] The present invention relates to a color filter including a coloring composition for a color filter, a filter segment and / or a black matrix, a black resin composition, a black matrix, and a driving substrate for a thin-film transistor (TFT) type color liquid crystal display device. Background technique [0002] A liquid crystal display device is a display device in which a liquid crystal layer sandwiched between two polarizers controls the degree of polarization of light passing through the first polarizer and controls the amount of light passing through the second polarizer to display. A type of twisted nematic (TN) liquid crystal has become the mainstream. As another typical liquid crystal display system, there is an in-plane switching (IPS) system in which a pair of electrodes are provided on one substrate and an electric field is applied in a direction parallel to the substrate, and a substrate having negative dielectric anisotropy The vertical al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/004G03F7/027G02B5/20G02F1/133
CPCC09B67/006G02B5/20G02B5/201G03F7/004G03F7/0045G03F7/027
Inventor 近藤庆一门胁智之早坂努山本裕一
Owner TOYO INK SC HOLD CO LTD
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