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Azo pigment, color filter, colorant and coloring composition used therefor, and display device and imaging element including the same

A technology of color filter and coloring composition, which is applied in azo dyes, optical elements, anthraquinone-azo dyes, etc., can solve the problems of high tinting strength, achieve excellent fastness, good storage stability, coating The effect of less membrane foreign matter

Active Publication Date: 2022-07-08
TOYO INK SC HOLD CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing combination of red pigment and yellow pigment, there is no material that satisfies both brightness and tinting power, and color materials with high tinting power are required.

Method used

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  • Azo pigment, color filter, colorant and coloring composition used therefor, and display device and imaging element including the same
  • Azo pigment, color filter, colorant and coloring composition used therefor, and display device and imaging element including the same
  • Azo pigment, color filter, colorant and coloring composition used therefor, and display device and imaging element including the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0422] (Production of Azo Pigment 1)

[0423] [hua 20]

[0424]

[0425] After adding 185 parts of base compound [B-1] to 1500 parts of N-methylpyrrolidone, 294 parts of 35% hydrochloric acid was added, and it cooled so that it might become -2 degreeC - 0 degreeC. After adding 208 parts of 25% sodium nitrite aqueous solution to the said solution, it stirred for 30 minutes, maintaining at 0 degreeC - 5 degreeC, and prepared the diazonium solution. Separately, a coupling solution containing 216 parts of the coupling compound [C-1], 316 parts of a 25% sodium hydroxide solution, and 1500 parts of methanol was prepared. The prepared diazonium solution and the coupling solution were added dropwise to 1000 parts of an acetic acid buffer solution having a pH value of 5.4 over 10 minutes. After completion of the dropwise addition, the mixture was stirred at room temperature for 30 minutes, and further stirred while maintaining the temperature at 80°C. The precipitated product was ...

Embodiment 2

[0430] (Production of Azo Pigment 2)

[0431] Except having used 169 parts of base compounds [B-2] instead of 185 parts of base compounds [B-1] used in the manufacture of azo pigments 1, the same operations as in manufacture of azo pigments 1 were performed to obtain 400 parts (Yield: 97.5%) Azo Pigment 2. Mass analysis and elemental analysis were performed by TOF-MS, and the result was identified as azo pigment 2.

[0432] [Chemical 22]

[0433] Azo Pigment 2

[0434]

Embodiment 3

[0436] (Production of Azo Pigment 3)

[0437] Except having used 210 parts of base compound [B-3] instead of 185 parts of base compound [B-1] used in manufacture of azo pigment 1, the same operation as that of manufacture of azo pigment 1 was performed to obtain 420 parts (Yield: 96.5%) Azo Pigment 3. Mass analysis and elemental analysis were carried out by TOF-MS, and the result was identified as azo pigment 3.

[0438] [Chemical 23]

[0439] Azo Pigment 3

[0440]

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Abstract

The present invention provides an azo pigment, a color filter, a colorant and a coloring composition therefor, and a display device and an imaging element including the same, which are not only excellent in heat resistance, light resistance, etc. The coloring composition for color filters has few foreign matter in the film, good storage stability and dye migration properties, high brightness, and a thin film thickness when the same color is expressed. The said subject is solved by the azo pigment represented by following general formula (1). In general formula (1), R 1 Represents a halogen atom, an alkyl group which may have a substituent, an alkoxy group which may have a substituent, an aryloxy group which may have a substituent; R 2 and R 3 Each independently represents a hydrogen atom, an alkyl group which may have a substituent, and a phenyl group which may have a substituent.

Description

technical field [0001] The present disclosure relates to an azo pigment, a colorant for a color filter, a coloring composition for a color filter, a color filter, a liquid crystal display device, a solid-state imaging element, and an organic electroluminescence (EL) display device. Background technique [0002] The liquid crystal display device is a display device in which a liquid crystal layer sandwiched between two polarizing plates controls the degree of polarization of light passing through the first polarizing plate and controls the amount of light passing through the second polarizing plate to perform display. Regarding the liquid crystal display device, a type using a twisted nematic (TN) type liquid crystal has become the mainstream. As other typical liquid crystal display device systems, there are an in-plane switching (IPS) system in which a pair of electrodes is provided on a substrate on one side and an electric field is applied in a direction parallel to the s...

Claims

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Application Information

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IPC IPC(8): C09B56/12C09B67/22G02B5/22G02F1/1335G03F7/004G03F7/027
CPCC09B56/12C09B67/0033G02B5/223G02F1/133514G03F7/004G03F7/027C09B33/056G03F7/105G03F7/032G03F7/0007
Inventor 平佐美幸阿部悠太斋藤纱也佳清水宏明坂本昌平常川美沙绪山本裕一
Owner TOYO INK SC HOLD CO LTD
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