Colorant dispersion liquid 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 and good Dispersion performance and dispersion stability performance, and the effect of improving voltage retention

Active Publication Date: 2021-09-28
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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  • Colorant dispersion liquid for color filter, coloring composition for color filter, color filter and display device
  • Colorant dispersion liquid for color filter, coloring composition for color filter, color filter and display device
  • Colorant dispersion liquid for color filter, coloring composition for color filter, color filter and display device

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Experimental program
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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 present invention relates to a color material dispersion liquid for color filters, a coloring composition for color filters, a color filter, and a display device. Excellent pigment dispersion for color filters. In addition, there is provided a coloring composition for a color filter using a colorant dispersion liquid, which has a high residual film rate when producing a colored layer, and which can satisfactorily color the colorant even if the colorant concentration of the coloring composition is increased. Even if the concentration of the colorant is increased, it is not easy to deteriorate over time. The subject of the present invention can be solved by the color material dispersion liquid for color filter containing color material, dispersant and solvent, and the coloring composition for color filter using the same, and color filter. It is characterized in that the total mass of calcium (Ca) and iron (Fe) contained in the color material dispersion liquid for color filters is 180 mass ppm or less with respect to the entire color material dispersion liquid for color filters.

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 Patents(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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