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Liquid crystal aligning agent for photo alignment, liquid crystal aligning film, and liquid crystal display device

A technology of liquid crystal alignment agent and photo-orientation, which is applied in liquid crystal materials, optics, nonlinear optics, etc., can solve the problems of liquid crystal alignment film or the reduction of afterimage characteristics, and achieve the effect of high liquid crystal orientation and afterimage characteristics

Inactive Publication Date: 2019-03-15
JNC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above-mentioned liquid crystal aligning agent for photo-alignment, there is a possibility that the average of the polymer composition occurs during long-term storage at room temperature, and as a result, the liquid crystal orientation or afterimage characteristics of the obtained liquid crystal aligning film may decrease.

Method used

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  • Liquid crystal aligning agent for photo alignment, liquid crystal aligning film, and liquid crystal display device
  • Liquid crystal aligning agent for photo alignment, liquid crystal aligning film, and liquid crystal display device
  • Liquid crystal aligning agent for photo alignment, liquid crystal aligning film, and liquid crystal display device

Examples

Experimental program
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Effect test

Embodiment

[0175] Hereinafter, the present invention will be described through examples. In addition, the evaluation methods and compounds used in the examples are as follows.

[0176]

[0177] 1. Weight average molecular weight (Mw)

[0178] The weight average molecular weight of a polyamic acid is calculated|required by the GPC method using 2695 separation modules and 2414 differential refractometers (made by Waters), and it calculated|required in polystyrene conversion. Dilute the obtained polyamic acid with a phosphoric acid-dimethylformamide (Dimethylformamide, DMF) mixed solution (phosphoric acid / DMF=0.6 / 100: weight ratio) so that the polyamic acid concentration becomes about 2% by weight . HSPgel RT MB-M (manufactured by Waters) was used as a column, and the mixed solution was used as a developing solvent, and the measurement was performed at a column temperature of 50° C. and a flow rate of 0.40 mL / min. As the standard polystyrene, TSK standard polystyrene manufactured by To...

Synthetic example 1

[0196] Put into the compound represented by the formula (V-2-1) of 2.1218g, 0.2087g of the formula (DI-13-1 ), 0.0851 g of the compound represented by the formula (DI-4-13), and 54.0 g of dehydrated NMP were stirred and dissolved under a dry nitrogen stream. Then, put the compound represented by the formula (AN-4-17) (m=8) of 2.7086g, the compound represented by the formula (PA-1) of 0.4357g, the compound represented by the formula (AN-1-1) of 0.4401g The indicated compound was mixed with 10.0 g of dehydrated NMP and stirring was continued at room temperature for 24 hours. BC 30.0g was added to the said reaction solution, and it stirred, heating to 60 degreeC, until the Mw of a polymer became a desired value, and the polyamic-acid solution whose polymer solid content concentration was 6 weight% was obtained. Let the said polyamic-acid solution be varnish A1. The Mw of the polymer A1 contained in the varnish A1 was 13,260. In addition, the varnish A1 was fractionated into a ...

Embodiment 1

[0203] [Example 1] Preparation of liquid crystal alignment agent for photo-alignment, fabrication of fringe field switching (Fringe Field Switching, FFS) liquid crystal display element and measurement of AC afterimage

[0204] Weigh 4.0 g of varnish A1 and 6.0 g of varnish B1 in a 50 mL eggplant-shaped flask, and add 5.0 g of N-methyl-2-pyrrolidone and 5.0 g of butyl cellosolve therein, and stir at room temperature for 1 hour. Thereby, the liquid crystal aligning agent 1 for photo-alignment with a resin component density|concentration of 3 weight% was obtained. In addition, 1 fraction of the prepared liquid crystal aligning agent for photoalignment was taken into a brown bottle, and it was stored at room temperature for 7 days. Let the stored liquid crystal aligning agent for photo-alignment be the liquid crystal aligning agent 1' for photo-alignment. When the viscosity of the liquid crystal aligning agent 1 for photo-alignment and the liquid crystal aligning agent 1' for pho...

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Abstract

The present invention relates to a liquid crystal aligning agent for photo-alignment, a liquid crystal aligning film, and a liquid crystal display device, wherein the liquid crystal aligning agent forphoto-alignment comprises a polymer A having a photoreactive structure and a polymer B having no photoreactive structure. The polymer A and the polymer B are respectively a product of a raw materialmonomer derived from at least one compound selected from the group consisting of the formula (AN-1-2) and the formula (AN-4-17). The liquid crystal aligning agent for photo-alignment of the present invention is excellent in the storage stability, so that the effect of not reducing the liquid crystal alignment property and residual image property of the liquid crystal aligning film formed by usingthe liquid crystal aligning agent for photo-alignment is achieved. In the formula (AN-1-2), m is an integer of 4 to 12; and, in the formula (AN-4-17), m is an integer of 4 to 12.

Description

technical field [0001] The present invention relates to a liquid crystal aligning agent for photo-alignment for forming a liquid crystal aligning film of a photo-alignment method (hereinafter, sometimes abbreviated as a photo-alignment film), a photo-alignment film formed using the liquid crystal aligning agent for photo-alignment, and A liquid crystal display element having the photo-alignment film. Background technique [0002] A liquid crystal aligning film plays an important role of aligning a liquid crystal in a liquid crystal display element. With the high quality of a liquid crystal display element, high liquid crystal orientation property and voltage retention are required for a liquid crystal aligning film. So far, we have studied the photo-alignment film which has the photoreactive group which causes photoisomerization or photodimerization in the structure of a polyamic acid (for example, refer patent document 1 - patent document 4). The photo-alignment film has ...

Claims

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Application Information

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IPC IPC(8): C09K19/56G02F1/1337
CPCG02F1/133723C09K19/56C08L79/08C08G73/1096
Inventor 大木洋一郎久田梨香堀田协子
Owner JNC CORP
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