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Arylamine compound, liquid crystal aligning agent prepared from arylamine compound, liquid crystal alignment film and liquid crystal display element

A liquid crystal aligning agent and compound technology, which is applied in liquid crystal materials, chemical instruments and methods, organic chemistry, etc., and can solve the problems of low transmittance and reduced brightness of liquid crystal display elements.

Active Publication Date: 2021-01-15
JIANGSU SUNERA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In liquid crystal display elements, if a liquid crystal alignment film with low transmittance is used, the brightness of the liquid crystal display element will decrease.

Method used

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  • Arylamine compound, liquid crystal aligning agent prepared from arylamine compound, liquid crystal alignment film and liquid crystal display element
  • Arylamine compound, liquid crystal aligning agent prepared from arylamine compound, liquid crystal alignment film and liquid crystal display element
  • Arylamine compound, liquid crystal aligning agent prepared from arylamine compound, liquid crystal alignment film and liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0059] The compound represented by structural formula (1-1) can be synthesized according to the following synthetic route 1:

[0060]

[0061] (1) Synthesis of compound 1-1-a

[0062] In a 1L three-neck round bottom flask, drop 2,4-diaminoiodobenzene (23.40 g, 100 mmol), Et 3 N (50.60g, 500mmol) and 200g toluene, the system was warmed up to 60 ° C, then slowly added dropwise to the system 3-nitro-4-methylbenzoyl chloride (41.91g, 210mmol) and 200g toluene The mixed solution was added dropwise in 0.5 hours, then the system was heated to 80°C and stirred for 8 to 10 hours, followed by TLC until no raw material 2,4-diaminoiodobenzene remained. Then the reaction system was lowered to room temperature, washed three times with 500mL*3 deionized water, and the upper organic phase was de-dried to obtain a light yellow solid, and 500mL of methanol / water mixture was added for beating, and the suspension was filtered and dried at 75 % Yield Compound 1-1-a was obtained.

[0063] (2)...

Synthetic example 2

[0070] The compound represented by structural formula (1-2) can be synthesized according to the following synthetic route 2:

[0071]

[0072] (1) Synthesis of compound 1-2-a

[0073] Add 1,4-diamino-2,5-diiodobenzene (35.99 g, 100 mmol), Et 3N (50.60g, 500 mmoles) and 200 g toluene, the system was warmed up to 60 ° C, then slowly added dropwise to the system 2-nitro-5-fluorobenzoyl chloride (42.75 g, 210 mmoles) and 200 g of toluene The mixture was added dropwise in about 0.5 hours, then the system was heated to 80°C and stirred for 8 to 10 hours, followed by TLC until no raw material 1,4-diamino-2,5-diiodobenzene remained. Then the reaction system was lowered to room temperature, washed three times with 500mL*3 deionized water, and the upper organic phase was de-dried to obtain a light yellow solid, and 500mL of methanol / water mixture was added for beating, and the suspension was filtered and dried to 76 % Yield Compound 1-2-a was obtained.

[0074] (2) Synthesis of co...

Synthetic example 3

[0083] The compound represented by structural formula (1-3) can be synthesized according to the following synthetic route 3:

[0084]

[0085] (1) Synthesis of compound 1-3-a

[0086] In a 1L three-neck round bottom flask, drop 2,4-diaminoiodobenzene (23.40 g, 100 mmol), Et 3 N (50.60g, 500mmol) and 200g toluene, the system was warmed up to 60 ° C, and then slowly added dropwise to the system a mixture of p-nitrobenzoyl chloride (38.97g, 210mmol) and 200g toluene, about 0.5 After hours of dropwise addition, the system was heated to 80°C and stirred for 8 to 10 hours, followed by TLC until no raw material 2,4-diaminoiodobenzene remained. Then the reaction system was lowered to room temperature, washed three times with 500mL*3 deionized water, the upper organic phase was de-dried to obtain a light yellow solid, and 500mL of methanol / water mixture was added for beating, and the suspension was filtered and dried to 73 % Yield Compound 1-3-a was obtained.

[0087] (2) Synthes...

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PUM

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Abstract

The invention discloses an arylamine compound and a liquid crystal alignment agent prepared from the arylamine compound, a liquid crystal alignment film and a liquid crystal display element, and belongs to the technical field of liquid crystal display. The liquid crystal alignment agent comprises a polymer A obtained by reaction of a tetracarboxylic dianhydride component a and an arylamine component b, and the arylamine component b comprises an arylamine compound b1 with a specific structure. The structure of the arylamine compound b1 is shown as a formula (1). The liquid crystal alignment film prepared from the liquid crystal alignment agent has the advantages of high film forming transmittance, and a prepared liquid crystal display element has high contrast ratio.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to an aromatic amine compound and a liquid crystal aligning agent prepared therefrom, a liquid crystal aligning film and a liquid crystal display element. Background technique [0002] Liquid crystal display elements are classified into various modes according to electrode structures and physical properties of liquid crystal molecules used. Currently known liquid crystal display devices are classified as follows, twisted nematic (Twisted Nematic, TN) type or super twisted nematic (Super Twisted Nematic, STN) type, fringe field switching (Fringe Field Switching, FFS) type vertical alignment (Vertical Alignment, VA) type, common In-plane switching (In-PlaneSwitching, IPS) type and other liquid crystal display elements. The liquid crystal alignment film aligns the liquid crystal molecules in the liquid crystal display element. Polyimide has become the first choice mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C237/40C09K19/56C08G73/10G02F1/1337
CPCC07C237/40C08G73/1007C08G73/1078C09K19/56G02F1/133711
Inventor 李士东钟尚宾李银花解万龙王明佼任辉彩
Owner JIANGSU SUNERA TECH CO LTD
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