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Liquid crystal aligning agent, liquid crystal aligning film and liquid crystal display element using same

A liquid crystal aligning agent and liquid crystal technology, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of harsh characteristics of liquid crystal aligning films, etc., and achieve the effect of not being easy to flicker, promoting relaxation, and rapid accumulation of charge relaxation

Active Publication Date: 2018-11-23
NISSAN CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the performance of liquid crystal display elements increases, the properties required for liquid crystal alignment films become more stringent, and it is difficult to fully satisfy all required properties with these existing technologies

Method used

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  • Liquid crystal aligning agent, liquid crystal aligning film and liquid crystal display element using same
  • Liquid crystal aligning agent, liquid crystal aligning film and liquid crystal display element using same
  • Liquid crystal aligning agent, liquid crystal aligning film and liquid crystal display element using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0141] Hereinafter, the present invention will be specifically described with examples and the like. In addition, this invention is not limited to these Examples. The abbreviations of the compounds used below and the method of characteristic evaluation are as follows.

[0142]

[0143]

[0144] In the above formula, Boc is a group represented by the following formula.

[0145]

[0146]

[0147] NMP: N-methyl-2-pyrrolidone, GBL: γ-butyrolactone,

[0148] BCS: Butyl Cellosolve

[0149]

[0150] LS-4668: 3-Glycidoxypropyltriethoxysilane

[0151]

[0152]

[0153] ( 1 H-NMR measurement)

[0154] Device: Varian NMR system 400NB (400MHz) (manufactured by Varian Corporation), and JMTC-500 / 54 / SS (500MHz) (manufactured by JEOL Corporation)

[0155] Determination solvent: CDCl 3 (deuterochloroform), DMSO-d 6 (Deuterated Dimethyl Sulfoxide)

[0156] Reference material: TMS (tetramethylsilane) (δ: 0.0ppm, 1 H) and CDCl 3 (δ: 77.0ppm, 13 c)

[0157]

[0158...

Synthetic example 1

[0176] After adding DA-1 (2.49 g, 10.0 mmol) to a 100 ml four-necked flask equipped with a stirring device and a nitrogen gas introduction tube, 29.0 g of NMP was added, and stirred while feeding nitrogen gas to dissolve it. After adding CA-2 (0.98 g, 5.0 mmol) and NMP 3.6 g (addition amount 1 in Table 1) while stirring this solution, it stirred at 25 degreeC for 1 hour. After that, CA-1 (0.87g, 4.0mmol) was added, NMP3.6g (addition amount 2 in Table 1) was added, and stirring was carried out at 50° C. for 12 hours to obtain a polymer having a resin solid content concentration of 12% by mass. Amic acid solution (PAA-A1). The viscosity of this polyamic acid solution was 300 mPa·s.

Synthetic example 2～16

[0178] Using the tetracarboxylic dianhydride component, the diamine component and the NMP amount shown in Table 1, respectively become the reaction temperature shown in Table 1, except that it was carried out in the same manner as Synthesis Example 1, thereby obtaining Polyamic acid solutions (PAA-A2)~(PAA-A9) and polyamic acid solutions (PAA-B1)~((PAA-B7) with solid content concentration and viscosity shown.

[0179] [Table 1]

[0180]

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Abstract

Provided are: a liquid crystal aligning agent from which a liquid crystal aligning film having a high voltage holding ratio, quickly mitigating electrical charge accumulation and showing reduced flicker occurrence during driving can be obtained; a liquid crystal aligning film; and a liquid crystal display element. The liquid crystal aligning agent comprises a polymer, which is obtained from a diamine having a structure represented by formula (1), and an organic solvent. In formula (1), R1 represents a hydrogen or fluorine atom, a cyano group, a hydroxy group or a monovalent organic group; * represents a site binding to another group; and an arbitrary hydrogen atom of the benzene ring may be substituted by a monovalent organic group.

Description

technical field [0001] The present invention relates to a liquid crystal aligning agent using a novel polymer, a liquid crystal aligning film, and a liquid crystal display element using the same. Background technique [0002] Liquid crystal display devices are widely used as display parts of personal computers, mobile phones, smartphones, and televisions. A liquid crystal display element includes, for example, a liquid crystal layer sandwiched between an element substrate and a color filter substrate, a pixel electrode and a common electrode for applying an electric field to the liquid crystal layer, an alignment film for controlling the orientation of liquid crystal molecules in the liquid crystal layer, and a switching pair pixel. Thin-film transistors (TFTs) that supply electrical signals to the electrodes, etc. As a method for driving liquid crystal molecules, longitudinal electric field methods such as the TN method and the VA method, and transverse electric field meth...

Claims

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Application Information

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IPC IPC(8): G02F1/1337C08G73/10
CPCC08G73/10G02F1/1337C09K19/56G02F1/133723
Inventor 相马早纪森本佳道石川和典南悟志石井秀则
Owner NISSAN CHEM IND LTD
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