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Polymerizable compound and its application in optical anisotropic body and liquid crystal display element

A polymerizable compound and compound technology, applied in optical components, nonlinear optics, chemical instruments and methods, etc., can solve the problems of high residual amount of polymerizable compounds, insufficient blue phase temperature range, affecting the practicality of blue phase liquid crystals, etc. , to achieve the effect of improving poor display, good solubility and fast polymerization rate

Active Publication Date: 2015-04-29
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] CN03146257 discloses a liquid crystal medium for polymer stabilized vertical alignment (PSVA, polymer stabilized vertical alignment), which is characterized in that it contains a liquid crystal composition with a specific structure and a polymerizable compound, but its polymerizable compound is only limited to single reactive compounds and Two reactive compounds, the polymerization speed is slow, and the residual amount of polymerizable compounds after polymerization is high, which seriously affects the reliability of liquid crystal display
[0006] CN101080480 discloses a mesogenic system for polymer stabilized blue phase (PSBP, polymer stabilized blue phase), which consists of polymer precursors and low molecular weight components, but its polymer precursors are limited to single reactive compounds and The second reactive compound can only provide limited mechanical properties, resulting in an insufficient blue phase temperature range, which affects the practicability of blue phase liquid crystals

Method used

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  • Polymerizable compound and its application in optical anisotropic body and liquid crystal display element
  • Polymerizable compound and its application in optical anisotropic body and liquid crystal display element
  • Polymerizable compound and its application in optical anisotropic body and liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The synthetic route to prepare compound I-2-1 is as follows:

[0044]

[0045] It includes the following steps:

[0046] 1) Synthesis of compound A

[0047] Add 4g 5-bromoindanone, 120g DMSO (dimethyl sulfoxide), 5.06g pinacol diborate, 3.72g potassium acetate, 0.28g Pd(dppf)Cl 2 , Under the protection of nitrogen, reflux for 3h.

[0048] After the reaction is completed, suction filtration, the filtrate is poured into ice water, and suction filtration is performed again to obtain a gray-black viscous solid, which is dissolved and dried and passed through the column to obtain 3.19 g of solid. Petroleum ether was beaten to obtain 2.5 g of white solid compound A.

[0049] 2) Synthesis of compound B

[0050] HPGBr:

[0051] Add 5.67g HPGBr (50% purity), 2.5g compound A and 50g DME (dimethyl ether) into a three-necked flask, stir to dissolve, and under the protection of nitrogen, add an aqueous solution of sodium carbonate and 4-3-Pd in ​​turn Phosphine palladium), heated to 100 ℃ re...

Embodiment 2

[0058] The polymerizable liquid crystal composition LC-1 with the composition shown in the following formula was prepared, and the composition of the liquid crystal compound and the weight ratio are as follows:

[0059]

[0060] The physical properties of the above-mentioned liquid crystal composition are: clearing point Cp=80°C, optical anisotropy Δn=0.102, and dielectric constant anisotropy Δε=-3.20.

[0061] 0.3% of the compound (I-2-1) of Example 1 was added to 99.7% of the liquid crystal composition LC-1, and the mixture was uniformly dissolved to obtain a mixture PLC-1. The physical properties of PLC-1 are almost the same as those of LC-1. no difference. Use the vacuum infusion method to inject PLC-1 into a test box with a gap of 4μm and a homeotropic alignment. While applying a square wave with a frequency of 60Hz and a driving voltage of 16V, the test box is irradiated with ultraviolet light by a high-pressure mercury UV lamp. , Adjust the irradiation intensity of the box ...

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Abstract

The invention relates to a polymerizable compound with general formula I, also provides a polymerizable liquid crystal composition containing the polymerizable compound and a liquid crystal display element containing the polymerizable compound, and especially provides a liquid crystal display element used for PS or PSA (polymer stabilized or polymer stably-aligned) liquid crystal displays. The polymerizable liquid crystal compound has the advantages of good solubility, good orientation effect, fast polymerization rate, complete polymerization and low residue, so the bad display problem can be greatly improved.

Description

Technical field [0001] The present invention relates to a polymerizable compound, a polymerizable liquid crystal composition containing the polymerizable compound, and its application in optically anisotropic bodies and polymer stable liquid crystal display elements, especially in PS or PSA ("Polymer Stable" or "Polymer Stable Alignment") application in liquid crystal displays. Background technique [0002] In recent years, with the rapid development of the information society, more brilliant and more precise flat display technology and three-dimensional display technology have been born, which can be used for optical retarders and patterned retarders of this type of liquid crystal display. The importance of optical anisotropic bodies in lenticular lenses, etc. is increasing day by day. For optically anisotropic bodies that require high durability and high functionality, in addition to optical properties, polymerization speed, solubility, melting point, glass transition temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/653C09K19/52C08F222/18C08F222/14G02B5/30G02B1/04G02F1/1335G02F1/1333
Inventor 马文阳圣磊李鹏飞
Owner JIANGSU HECHENG DISPLAY TECHCO
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