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Triazole-containing tetracarboxylic dianhydride, polymer, liquid crystal aligning agent, liquid crystal aligning film, and liquid crystal display element

A technology of liquid crystal aligning agent and tetracarboxylic dianhydride, used in liquid crystal materials, organic chemistry, instruments, etc., can solve the problems of reduced panel display quality, film peeling, reduction, etc., to achieve good electrical characteristics, high film hardness, good Show performance effects

Active Publication Date: 2019-11-05
长沙道安捷新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the photo-alignment film using this technology has the following problems: it is easy to peel off or cut the film when it is made into a panel, and the generated foreign matter will reduce the display quality of the panel

Method used

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  • Triazole-containing tetracarboxylic dianhydride, polymer, liquid crystal aligning agent, liquid crystal aligning film, and liquid crystal display element
  • Triazole-containing tetracarboxylic dianhydride, polymer, liquid crystal aligning agent, liquid crystal aligning film, and liquid crystal display element
  • Triazole-containing tetracarboxylic dianhydride, polymer, liquid crystal aligning agent, liquid crystal aligning film, and liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0776] [Example 1] Synthesis of compound (1-1)

[0777] [chem 163]

[0778]

[0779]

[0780] 4-(4-Bromobutyl) diethyl phthalate (12.1 g, 34.0 mol) was placed in a three-necked flask equipped with a thermometer and a nitrogen inlet tube, and 70 mL of DMF was added thereto. Sodium azide (2.4 g, 37.4 mmol) was added thereto. Thereafter, the solution was heated to 60° C., and stirred at the same temperature for 3 hours under a nitrogen atmosphere. The reaction solution was added to 400 mL of water, and extracted twice with 300 mL of heptane. After drying the organic layer with magnesium sulfate, the solvent was distilled off under reduced pressure to obtain a 4-(4-azidobutyl)-phthalic acid diethyl ester compound (yield: 10.0 g, yield: 92%).

[0781]

[0782] 4-(4-azidobutyl) diethyl phthalate (10.0 g, 31.3 mmol), 4-ethynyl - Dimethyl phthalate (7.5 g, 34.4 mmol), add 50 mL of dichloromethane and 50 mL of water. After stirring at room temperature to dissolve the compou...

Embodiment 2

[0793] [Example 2] Synthesis of compound (1-5)

[0794] [chem 166]

[0795]

[0796]

[0797] 1,6-Dibromohexane (5.0 g, 20.5 mmol) was put into a 100 mL three-necked flask equipped with a thermometer and a nitrogen inlet tube, and 25 mL of DMF was added. Sodium azide (2.9 g, 45.6 mmol) was added thereto. Thereafter, the solution was heated to 60° C., and stirred at the same temperature for 3 hours under a nitrogen atmosphere. The reaction solution was added to 200 mL of water, and extracted twice with 100 mL of heptane. After drying the organic layer with magnesium sulfate, the solvent was distilled off under reduced pressure to obtain 1,6-diazidohexane (3.2 g of yield, 93% yield).

[0798]

[0799] Put 1,6-diazidohexane (2.2 g, 13.1 mmol) and 4-ethynyl-phthalic acid dimethyl ester (5.7 g, 26.2 mmol) obtained in the first stage, and add 5 mL of diazide Chloromethane with 5 mL of water. After stirring at room temperature to dissolve the compound, copper sulfate pentah...

Embodiment 3

[0810] [Example 3] Synthesis of compound (1-6)

[0811] [chem 169]

[0812]

[0813]

[0814] Put 1,6-diazidohexane (2.2g, 13.1mmol), 4-ethynyl-1,2-cyclohexanedicarboxylic acid dimethyl ester (6.2g, 27.5mmol), add 20ml of dichloro Methane and 20ml of water. After stirring at room temperature to dissolve the compound, copper sulfate pentahydrate (0.16 g, 0.65 mmol) and L-sodium ascorbate (0.26 g, 13 mmol) were added, followed by stirring at room temperature for 1 hour. The reaction solution was added to 50 ml of water, and extracted twice with 50 ml of toluene. After drying the organic layer over magnesium sulfate, the solvent was distilled off under reduced pressure to obtain a crude product. The crude product was purified by column chromatography to obtain the following compound (yield: 7.8 g, yield: 97%).

[0815] [chem 170]

[0816]

[0817]

[0818] The compound (7.0 g, 11.3 mmol) obtained in the first stage was added to a three-necked flask equipped with a ...

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Abstract

The invention provides tetracarboxylic dianhydride containing triazole, a polymer, a liquid crystal aligning agent, a liquid crystal aligning membrane, and a display element. The tetracarboxylic dianhydride is represented by the formula (1); wherein in the formula (1), the X represents a divalent organic group containing at least one triazole ring, the R1 and R2 individually represent one of trivalent groups, which are represented in the description; and at least one hydrogen atom of these groups can be replaced by a methyl group, an ethyl group, or a phenyl group. The liquid crystal aligning agent can form a liquid crystal aligning membrane that is hard to peel off or eliminate.

Description

technical field [0001] The present invention relates to a novel tetracarboxylic dianhydride, polyamic acid or its derivative obtained by using it, and its application, especially a tetracarboxylic dianhydride containing triazole, a polymer, and a liquid crystal aligning agent , liquid crystal alignment film, and liquid crystal display elements. In addition, the term "liquid crystal aligning agent" in this invention shows the polymer containing composition for forming a liquid crystal aligning film. Background technique [0002] In various display devices such as monitors of personal computers, LCD TVs, view finders of video cameras, projection displays, and optical printer heads, Among optical electronics-related components such as optical Fourier transform elements and light valves, nematic liquid crystal (nematic liquid crystal) display components. The display modes of the nematic liquid crystal display element are known as a twisted nematic (Twisted Nematic, TN) mode a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D405/14C08G73/10C09K19/56G02F1/1337
CPCC07D405/14C08G73/1085C09K19/56G02F1/133723
Inventor 塚田裕以智田村典央藤马大亮小口雄二郎
Owner 长沙道安捷新材料有限公司
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