Colorant dispersion liquid, colored resin composition, color filter and liquid crystal display

A technology of resin composition and dispersion liquid, applied in the direction of optical filter, organic dye, pigment slurry, etc., can solve the problems of reduced curability, reduced pixel surface smoothness, influence, etc., achieves excellent adhesion, inhibits drying agglomeration effect

Inactive Publication Date: 2007-02-21
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, components that contribute to image forming properties such as photosensitivity, solubility, and curability are relatively reduced, and the original image forming performance is lost.
That is, when attempting to reduce the pixel thickness (lower film thickness) due to, for example, high density, the curability decreases, the surface smoothness of the pixel decreases, and poor alignment of the liquid crystal occurs.
In addition, when the solubility decreases, the undissolved matter of the colored resin composition tends to remain in the non-image portion after development.
In addition, when the undissolved matter of the colored resin composition remains on the non-pixel portion of the substrate, the obtained color filter will cause a decrease in transmittance or contrast, and if it remains on the edge of the pattern (pattern engineering) , will cause the peeling of the ITO film or the deterioration of the sealing performance in the liquid crystal unitization step, etc., so as to affect the subsequent steps

Method used

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  • Colorant dispersion liquid, colored resin composition, color filter and liquid crystal display
  • Colorant dispersion liquid, colored resin composition, color filter and liquid crystal display
  • Colorant dispersion liquid, colored resin composition, color filter and liquid crystal display

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0367] [2-6] Preparation of coloring composition

[0368] Next, a specific example of the production method of the colored resin composition of the present invention will be described.

[0369] In the colorant dispersion obtained by the dispersion treatment described in [1-5] above, a solvent, a binder resin, a polyfunctional monomer, a photopolymerization initiator component, and other components mixed as necessary are mixed to prepare into a uniform dispersed solution. In addition, since fine impurities may be mixed in each step of the dispersion treatment step and the mixing step, it is preferable to filter the obtained colored resin composition through a filter.

[0370] [3] Manufacture of color filters

[0371] Next, a specific example of the manufacturing method of the color filter of the present invention will be described.

[0372] Color filters are manufactured by placing a black matrix on a transparent substrate, and then forming red, green, and blue pixel images ...

Embodiment 1～6 and comparative example 1～6

[0419] [1] (a) Synthesis of nitrogen-atom-containing graft copolymers or acrylic block copolymers (dispersants A to C)

Synthetic example 1

[0420] [1-1] Synthesis Example 1: Synthesis of Dispersant A

[0421] Mix 50 parts by weight of polyethyleneimine with a molecular weight of about 5000 and 40 parts by weight of polycaprolactone with n=5 and 300 parts by weight of propylene glycol monomethyl ether acetate, and stir at 150 ° C under a nitrogen atmosphere 3 hours. The dispersant thus synthesized had a weight average molecular weight Mw of about 9,000 as measured by GPC.

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Abstract

Disclosed is a colorant dispersion liquid which enables to reduce the amount of undissolved photosensitive colored composition remaining in non-image portions on a substrate when it is applied over the substrate. The colorant dispersion liquid has excellent adhesion to the substrate and does not deteriorate image-forming properties such as curability, so that it enables to produce a color filter having high concentration and low film thickness. In addition, since drying / clogging at a die lip edge is suppressed during application of this colorant dispersion liquid by die coating, this colorant dispersion liquid enables to produce a color filter with high yield. Specifically disclosed is a colorant dispersion liquid containing a colorant (A), a dispersing agent (B) and a solvent (C) which is characterized in that the dispersing agent (B) contains at least a graft copolymer (a) containing a nitrogen atom and a polymer (b) which is obtained by polymerizing a monomer component essentially containing a specific compound.

Description

technical field [0001] The present invention relates to a colorant dispersion liquid, a colored resin composition (hereinafter, sometimes referred to as "resist"), a color filter, and a liquid crystal display device. Specifically, it relates to a colorant dispersion that can uniformly form high-density and low-thickness pixels, has little residue on non-image parts after development, and has high pattern adhesion during development. , In addition, when the die coating method is used for coating, it is possible to suppress the occurrence of dry agglomerates at the front end of the die lip, and the colored resin composition using the color material dispersion, the color filter of the pixel formed using the colored resin composition sheet, and a liquid crystal display device having the color filter. Background technique [0002] Conventionally, pigment dispersion methods, dyeing methods, electrodeposition methods, and printing methods are known as methods for manufacturing col...

Claims

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Application Information

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IPC IPC(8): C09D17/00C09B67/46G02B5/20G02F1/1335C09B67/20
Inventor 大畑达宽鸣户俊也水上润二谷川景子
Owner MITSUBISHI CHEM CORP
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