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Pigment dispersion for color filter, coloring composition for color filter, color filter and display device

A coloring composition and color filter technology, which is applied in the field of colorant dispersion liquid for color filters and coloring compositions for color filters, can solve the problems of high degree of dispersion, parallax color mixing, insufficient technology, etc., and achieve good dispersion performance and Dispersion stability, less parallax color mixing, and excellent developability

Active Publication Date: 2017-01-18
DNP FINE CHEMICALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] However, the colorant dispersion liquid for color filters used in display screens requires an extremely high degree of dispersion, so the above-mentioned technology is still insufficient. In order to solve the above-mentioned problems, further improvement is desired.
[0019] In particular, there is a problem of parallax color mixing caused by high-definition. In addition, in order to require high color rendering of pixels and low film thickness of color filters, in recent years, a coloring composition for color filters is desired. Excellent performance in dispersion stability, various image characteristics, developability during color filter manufacturing, sensitivity, etc.

Method used

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  • Pigment dispersion for color filter, coloring composition for color filter, color filter and display device
  • Pigment dispersion for color filter, coloring composition for color filter, color filter and display device
  • Pigment dispersion for color filter, coloring composition for color filter, color filter and display device

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preparation example Construction

[0458] "Preparation of Coloring Composition for Color Filters"

[0459] The coloring composition of the present invention can be prepared by mixing at least an alkali-soluble resin and a polymerization initiator, and if necessary, a polymerizable polyfunctional compound and "other components" into the coloring material, and further mixing Solvent and mix.

[0460] Since the coloring composition of the present invention is used by preparing a colorant dispersion liquid in advance, aggregation of the coloring material can be effectively prevented and uniform dispersion can be achieved.

[0461] In addition, the colorant dispersion liquid in the present invention can be set to a high colorant concentration while maintaining an appropriate viscosity range and appropriate dispersion stability, so the coloring combination of the present invention obtained by using the colorant dispersion liquid in the present invention It can also achieve high pigment concentration while maintainin...

preparation example 1

[0496]

[0497] "Synthesis of Block Copolymer A"

[0498] A 500-mL 4-neck separable flask was dried under reduced pressure, and then the inside was replaced with argon (Ar).

[0499] Add 100 g of dehydrated tetrahydrofuran (THF), 2.0 g of methyltrimethylsilyldimethylketene acetal, and 1M acetonitrile solution of tetrabutylammonium-3-chlorobenzoate (TBACB) under argon flow 0.15 mL and 0.2 g of mesitylene, stirred and mixed.

[0500] 36.7 g of methyl methacrylate was dripped there over 45 minutes using the dropping funnel. As the reaction proceeded exotherm, the temperature was kept below 40°C with ice cooling. After 1 hour, 13.3 g of dimethylaminoethyl methacrylate (DMAEMA) which is said "a monomer" was dripped over 15 minutes. After reacting for 1 hour, 5 g of methanol was added to stop the reaction.

[0501] The solvent was removed under reduced pressure to obtain block copolymer A.

[0502] The mass average molecular weight determined by GPC measurement (NMP, LiBr 10 ...

preparation example 2

[0507]

[0508] "Synthesis of Block Copolymer B"

[0509] Add 250 parts by mass of dehydrated tetrahydrofuran (THF) and 0.6 parts by mass of lithium chloride into a 500 mL round-bottomed 4-neck detachable flask equipped with a cooling tube, a funnel for addition, a feed port for nitrogen, a mechanical stirrer, and a digital thermometer, and carry out the process fully. Nitrogen replacement.

[0510] After cooling the reaction flask to -60° C., 4.9 parts by mass of butyl lithium (15 mass % hexane solution), 1.1 parts by mass of diisopropylamine, and 1.0 parts by mass of methyl isobutyrate were injected using a syringe.

[0511] As the "b monomer" above, 2.2 parts by mass of 1-ethoxyethyl methacrylate (EEMA) and 18.7 parts by mass of 2-hydroxyethyl methacrylate (HEMA) were added dropwise over 60 minutes using the addition funnel. , 12.8 parts by mass of 2-ethylhexyl methacrylate (EHMA), 13.7 parts by mass of n-butyl methacrylate (BMA), 9.5 parts by mass of benzyl methacrylate...

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Abstract

The invention relates to a pigment dispersion for a color filter, a coloring composition for a color filter, a color filter and a display device. The invention aims to provide the pigment dispersion for the color filter, wherein the pigment dispersion has advantages of film thickness increase of the color filter, low parallax color mixing amount, excellent pixel color reproduction performance, etc. Additionally, the invention provides the coloring composition for the color filter, wherein the pigment dispersion is used. The pigment dispersion realizes high residual film ratio in manufacturing a coloring layer. Even pigment concentration of the coloring composition is increased, the pigment can be well dispersed. Even pigment concentration is increased, time degradation does not easily occur. The aim of the invention can be settled through the pigment dispersion for the color filter, the coloring composition for the color filter, and the color filter. The pigment dispersion comprises a pigment, a dispersing agent and a solvent. The pigment dispersion for the color filter is characterized in that total mass of calcium (Ca) and iron (Fe) contained in the pigment dispersion for the color filter relative to the total weight of the pigment dispersion for the color filter is less than 180 mass ppm.

Description

technical field [0001] The present invention relates to a colorant dispersion liquid for color filters, a coloring composition for color filters, and more specifically, the present invention relates to a colorant dispersion liquid for color filters, a coloring composition for color filters and Use the color filters they get. Background technique [0002] A color filter used in a display screen generally has a transparent substrate, a colored layer, a light-shielding portion, and the like. Methods for forming the colored layer include a pigment dispersion method, a dyeing method, an electrodeposition method, and a printing method. Among them, From the viewpoint of spectral characteristics, durability, pattern shape, precision, etc., the pigment dispersion method is widely used (Patent Documents 1 and 2). [0003] In recent years, due to the development of displays, the demand for liquid crystal displays, organic EL displays, etc. has increased, and along with this, among the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D17/00G03F7/004G02B5/22G02F1/1335
CPCC09D17/002G02B5/223G02F1/133514G03F7/004
Inventor 田中靖之角知亚纪铃木琢实山县秀明上森理惠
Owner DNP FINE CHEMICALS CO LTD
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