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Triazine ring based polymers for photoinduced liquid crystal alignment, liquid crystal alignment layer containing same, liquid crystal element using alignment and method of mfg. same

A technology of triazine ring group and liquid crystal element, which is applied in the direction of liquid crystal material, chemical instrument and method, photoplate making process of pattern surface, etc.

Inactive Publication Date: 2004-10-06
LG CABLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention relates to a non-contact liquid crystal alignment method using light irradiation, which can align liquid crystals into multi-quadrants (multi domains), so as to solve the problems of the traditional contact grinding method and the traditional contact silicon oxide deposition method

Method used

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  • Triazine ring based polymers for photoinduced liquid crystal alignment, liquid crystal alignment layer containing same, liquid crystal element using alignment and method of mfg. same
  • Triazine ring based polymers for photoinduced liquid crystal alignment, liquid crystal alignment layer containing same, liquid crystal element using alignment and method of mfg. same
  • Triazine ring based polymers for photoinduced liquid crystal alignment, liquid crystal alignment layer containing same, liquid crystal element using alignment and method of mfg. same

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Effect test

no. 1 example

[0024] In the first embodiment, the general chemical formula of the polymer is shown in Chemical Formula 1 below.

[0025] Chemical formula 1

[0026]

[0027] (m+n=1, 0≤m≤1, and 0≤n≤1)

[0028] In chemical formula 1, R 1 It is selected from (1a) to (4a) in the following chemical formula 2.

[0029] Chemical formula 2

[0030]

[0031] In (1a) of Chemical Formula 2, X is one selected from Chemical Formula 3 below.

[0032] Chemical formula 3

[0033] -((CH 2 ) n O) m --O((CH 2 ) n O) m -

[0034]

[0035] (Here, m and n are each one of 0 to 10.)

[0036] In addition, in (1a) of Chemical Formula 2, Y is selected from Chemical Formula 4 below.

[0037] Chemical formula 4

[0038]

[0039] In the above chemical formula 4, the chemical formula represented by the number 1, 2, 3, 4, 5, 6, 7, 8 or 9 is one selected from the following chemical formula 5.

[0040] Chemical formula 5

[0041] -A -(CA 2 ) n CA 3 -O(CA 2 ) n CA 3 -(O(CA 2 ) m ) n CA 3 -O(CA 2 ) n OCA 3 -(O(CA...

Embodiment 1-1

[0094] A polyamide polymer used for light-induced liquid crystal alignment, with a cinnamate color base

[0095](1) Conversion of triazine ring

[0096] 27.1g of 4(2-tetrahydropyranylmethoxy) bromobenzene (4(2-tetrahydropyranylmethoxy) bromobenzene) was dissolved in 250ml of anhydrous THF in a three-necked flask filled with nitrogen. , Then add 3g of magnesium and stir for 24 hours. The solution was reacted in a three-neck flask filled with nitrogen at -20°C for 12 hours, and at the same time 18.4 g of cyanuric chloride was slowly added to 200 ml of anhydrous tetrahydrofuran.

[0097] After the reaction, the reaction solution was depressurized at room temperature to remove tetrahydrofuran, and then dissolved in ethyl acetate. After mixing the solution with the basic solution and stirring thoroughly to extract impurities, the aqueous phase is separated and removed from the solution, and then the solution is depressurized at room temperature to remove acetic acid Ethyl ester.

[009...

Embodiment 1-2

[0115] A polyamide polymer with a chalcone color group for light-induced liquid crystal alignment

[0116] (1) Synthesis of functional group of styrenone compound

[0117] 10 g of chalcone and 2.05 g of sodium cyanide were dissolved in 100 ml of dimethyl sulfoxide (“DMSO”) and reacted for 24 hours. After the reaction, the reaction solution was mixed with chloroform and stirred with distilled water to extract impurities. After removing part of the solution phase, the solution was depressurized at room temperature to remove chloroform. After the residual solid phase was recrystallized in methanol, the solution was dried under vacuum, thus obtaining a 4-hydroxyoxystyrene ketone compound for photoreaction.

[0118] (2) Introduction of a hydroxyl functional group to a triazine ring

[0119] In the method of (1) of Example 1-2, 23.8 g of the synthesized 4-hydroxy styrene ketone compound was added to a round bottom flask filled with nitrogen, and then dissolved in 240 ml of anhydrous tet...

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Abstract

Triazine ring based polymers for photoinduced liquid crystal alignment introduces photoactive groups for inducing, reinforcing, improving and preserving liquid crystal alignment, for example photoreactor such as cinnamate, coumarin, chalcone and maleimide, as a chain to have at least one photoactive group. One of the photoactive groups can experience Fries rearrangement which induces liquid crystal alignment, and other groups can experience photodimerization, photoisomerization, photocrosslinkng or photodegradation to reinforce, change or preserve the generated alignment.

Description

Technical field [0001] The present invention relates to a triazine ring polymer used for photoinduced liquid crystal alignment (alignment), and a liquid crystal alignment layer using the polymer, and particularly relates to use for photoinduced liquid crystal alignment The alignment polymer has at least one photoactive chromophore, and one chain of the chromophore has a photoactive group for guiding the alignment of the liquid crystal and strengthening, improving and preserving the alignment of the liquid crystal. Chains are introduced into a main chain of the polymer, and a liquid crystal layer using these polymers. Background technique [0002] A polymer for light-induced liquid crystal alignment is used as an agent for liquid crystal alignment of a device that uses the optical properties of the liquid crystal. Generally speaking, the polymer used for light-induced liquid crystal device materials can be coated with a polymer on a substrate to align a liquid crystal, and then ir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/038C08G69/26C08G73/10C08G73/14C09K19/52C09K19/56G02F1/1337
CPCG02F1/133711C09K19/56Y10S522/904G02F1/133788C09K2323/00C09K2323/02C09K2323/025C09K2323/027Y10T428/31721Y10T428/31725
Inventor 申东天金珍栗朴奎淳金泰珉
Owner LG CABLE INC
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