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Polymerizable compound, liquid crystal composition, and liquid crystal display device

A polymer compound and liquid crystal composition technology, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve problems such as poor solubility and high melting point

Active Publication Date: 2021-09-10
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] At present, the common problems in the production of PSA liquid crystal display devices are: the residue or removal of polymerizable compounds, the stability of pretilt angle
[0016] In addition, the polymerizable compounds in the prior art generally have high melting points, and show only limited solubility in many existing commonly used liquid crystal compositions, so that they are often precipitated from the liquid crystal composition
In addition, the polymerizable compound has the possibility of self-polymerization, so that its solubility in the liquid crystal composition is further deteriorated

Method used

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  • Polymerizable compound, liquid crystal composition, and liquid crystal display device
  • Polymerizable compound, liquid crystal composition, and liquid crystal display device
  • Polymerizable compound, liquid crystal composition, and liquid crystal display device

Examples

Experimental program
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Effect test

preparation example Construction

[0167] (1) Preparation of compound 1-3

[0168] Add 35g (169mmol) compound 1-1, 24.42g (177mmol) compound 1-2, 175mL toluene, 100mL ethanol, 100mL water, 29.76g (354mmol) sodium bicarbonate and 0.07g (0.1mmol) to a 500mL three-necked flask ) dichlorodi-tert-butyl-(4-dimethylaminophenyl)phosphine palladium(II). The mixture was replaced with nitrogen for 3 times, and the mixture was reacted for 2 hours under the condition that the temperature was controlled at 60° C. to 70° C.

[0169] The reaction solution was cooled to room temperature, and allowed to stand for liquid separation. The aqueous phase was extracted with 2 x 100 mL of toluene, and all organic phases were combined. The combined organic phases were sequentially washed with 3×80 mL of water, dried over anhydrous sodium sulfate, and concentrated to obtain a crude product. Then, 4 times the volume of petroleum ether was added to the crude product, and after beating at room temperature for 2 hours, it was frozen and c...

Embodiment 3-6

[0252] Table 5 Composition and performance parameters of Host 2

[0253]

[0254] To 100 parts by weight of the above-mentioned Host 2, add polymerizable compounds of the type and parts by weight shown in Table 5 below, and perform Ra, ΔPTA and t -20℃ And other performance tests, the results are as follows:

[0255] table 5

[0256]

[0257] It can be seen from the above Table 5 that the liquid crystal composition containing the polymerizable compound of the general formula I of the present invention has low roughness after the polymerization reaction occurs (that is, has a high degree of uniformity), and its pretilt angle is affected by ultraviolet light and long The change caused by time energization is small (that is, the stability is high), and it also has good low-temperature stability and a wide range of applications.

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Abstract

The invention discloses a polymerizable compound as shown in a general formula I defined in the description, a liquid crystal composition containing the polymerizable compound as shown in the general formula I, a PSA type liquid crystal display device containing the polymerizable compound as shown in the general formula I, and a PSA type liquid crystal display device containing the liquid crystal composition. Compared with the prior art, the liquid crystal composition containing the polymerizable compound as shown in the general formula I has the advantages of low roughness (namely, high uniformity) of a polymer after polymerization, small change (namely, high stability) of a pre-inclination angle caused by ultraviolet irradiation and long-time electrification, and good low-temperature stability, the requirement of a large-size PSA type liquid crystal display device for display uniformity can be met, bad display phenomena such as broken bright spots can be effectively avoided, the problem that regular display is not uniform due to the influence of the external environment is not prone to occurring, and good application value is achieved.

Description

technical field [0001] The invention relates to the field of liquid crystal display, in particular to a polymerizable compound, its liquid crystal composition and a liquid crystal display device. Background technique [0002] Liquid Crystal Display (LCD) has achieved rapid development due to its small size, light weight, low power consumption and excellent display quality, and is especially widely used in portable electronic information products. According to the type of display mode, liquid crystal display devices can be divided into PC (phase change, phase change), TN (twist nematic, twisted nematic), STN (super twisted nematic, super twisted nematic), ECB (electrically controlled birefringence, electrically controlled Birefringence), OCB (optical compensated bend), IPS (in-plane switching, coplanar transformation), FFS (fringe field switching, fringe field switching), VA (vertical alignment, vertical alignment) and PSA (polymer stable alignment, polymer stable alignment)...

Claims

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Application Information

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IPC IPC(8): C09K19/12C09K19/20C07C69/653C09K19/44G02F1/1337
CPCC09K19/126C09K19/20C07C69/653C09K19/44G02F1/133788C09K2019/122C09K2019/123
Inventor 徐海彬杨亚非丁文全徐爽
Owner JIANGSU HECHENG DISPLAY TECHCO
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