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Colorant dispersion, coloring resin composition, color filter, and liquid-crystal display device

A technology of resin composition and colorant, which is applied in the direction of optical filters, multi-color effect coatings, instruments, etc., can solve the problems of difficulty in reducing pigment particles, difficulty in dispersing, etc., and achieve excellent storage stability and depolarization characteristics excellent effect

Active Publication Date: 2008-03-26
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006]On the other hand, as the pigment particles are miniaturized, the surface area per unit weight increases, so the cohesion of the pigment particles increases, making its dispersion difficult
It is substantially difficult to reduce the size of the pigment particles, and it is also substantially difficult to prepare a stable dispersion using a finer pigment that has a trade-off relationship and can obtain high contrast in order to ensure its dispersibility

Method used

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  • Colorant dispersion, coloring resin composition, color filter, and liquid-crystal display device
  • Colorant dispersion, coloring resin composition, color filter, and liquid-crystal display device
  • Colorant dispersion, coloring resin composition, color filter, and liquid-crystal display device

Examples

Experimental program
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preparation example Construction

[0386] [2-6] Preparation of coloring composition

[0387] Next, a specific example of the production method of the colored resin composition of the present invention will be described.

[0388] 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.

[0389] [3] Manufacture of color filters

[0390] Next, a specific example of the manufacturing method of the color filter of the present invention will be described.

[0391] Color filters are manufactured by placing a black matrix on a transparent substrate, and then forming red, green, and blue pixel images ...

Embodiment

[0436] Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples. In addition, the present invention is not limited to the description of the following examples unless the gist is exceeded.

[0437] ·Synthesis of dispersant

Synthetic example 1

[0438] [1-1] Synthesis Example 1: Synthesis of Dispersant A (Graft Copolymer Containing Nitrogen Atoms)

[0439] 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 for 3 hours at 150 ° C under a nitrogen atmosphere . The dispersant thus synthesized had a weight average molecular weight Mw of about 9,000 as measured by GPC.

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Abstract

A pigment dispersion which has excellent depolarization characteristics, can form color pixels having a high contrast, and has excellent storage stability; a coloring resin composition containing this pigment dispersion; a color filter made from this coloring resin composition; and a liquid-crystal display employing this color filter. The dispersion is a colorant dispersion containing (A) a colorant and (B) a dispersant, and is characterized in that the colorant (A) comprises a pigment whose crystallite size is 140AA or smaller in terms of the value calculated using the Scherrer equation from a half-value width determined by X-ray diffractometry, and that the dispersant (B) comprises (a) a nitrogenous graft copolymer and / or an acrylic block copolymer.

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. In detail, it relates to a pigment dispersion liquid which is excellent in depolarization characteristics, capable of forming colored pixels with high contrast, and excellent in storage stability, and a colored resin composition containing the colorant dispersion liquid, a use A color filter of the colored resin composition, and a liquid crystal display device using the color filter. Background technique [0002] Conventionally, pigment dispersion methods, dyeing methods, electrodeposition methods, and printing methods are known as methods for manufacturing color filters used in liquid crystal display devices and the like. Among them, the pigment dispersion method having excellent characteristics in a balanced manner is most widely used from the viewpoints of s...

Claims

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Application Information

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IPC IPC(8): C09D17/00C09B25/00C09B29/52C09B35/22C09B57/04C09B67/20C09B67/46G03F7/004G02B5/20G02F1/1335
CPCG02F1/133514C09B67/009G02B5/206C09D5/29G02B5/201G03F7/0007C09B25/00C09B29/3665C09B67/006C09B67/0084
Inventor 田野冈久永大畑达宽鸣户俊也
Owner MITSUBISHI RAYON CO LTD
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