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Liquid crystal aligning agent compound and preparation method thereof

A technology of liquid crystal aligning agent and compound, which is applied in the field of liquid crystal aligning agent compound and its preparation, can solve the problems of TFT element damage, voltage retention, decrease, and inability to use, and achieve high voltage retention, high product purity, and suppress residue Effect

Inactive Publication Date: 2018-05-04
烟台丰鲁精细化工有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, friction is easy to generate dust and static electricity. When it is used on the substrate of high-end TFT components, it cannot be used on TFT displays due to the damage of TFT components and the reduction of voltage retention due to the generated static electricity. Therefore, as a liquid crystal display unit Alignment material, proposed to complete the optical alignment method of the liquid crystal alignment layer by the radiation-sensitive organic material formed on the surface of the substrate

Method used

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  • Liquid crystal aligning agent compound and preparation method thereof
  • Liquid crystal aligning agent compound and preparation method thereof
  • Liquid crystal aligning agent compound and preparation method thereof

Examples

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Embodiment 1

[0042] A liquid crystal aligning agent compound, its structural formula is as follows:

[0043]

[0044] The preparation method of the above-mentioned liquid crystal aligning agent compound, the steps are as follows:

[0045] (1) Preparation of Intermediate A

[0046] In a 500mL three-necked flask with a reflux tube, a temperature gauge and a nitrogen inlet tube, add 31 g of 1-bromo-4-(trans-4-pentylcyclohexyl)benzene, 0.23 g of palladium acetate, tris(o-tolyl) ) Phosphine 1.2g, triethylamine 56mL, acrylic acid 8.0-8.5mL and N,N-dimethylacetamide 200mL, stirred and reacted at 95-100°C for 5h; Add 1.0-2.0L of ethyl acetate, and the obtained organic layer was washed twice with dilute hydrochloric acid, and then washed with water for four times; after drying with magnesium sulfate, the solvent was removed under reduced pressure, and the obtained solid was washed with a mixed solvent of ethyl acetate and tetrahydrofuran Carry out recrystallization, obtain 15g cinnamic acid de...

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Abstract

The invention belongs to the field of liquid crystal display technology, and particularly relates to a liquid crystal aligning agent compound and a preparation method thereof. As a novel liquid crystal aligning agent, the compound is synthesized by adopting a three-step reaction, 1-bromo-4-(trans-4-amyl cyclohexyl)benzene, acrylic acid, thionyl chloride and hydroxyethyl methylacrylate are taken asmain raw materials, and the raw materials are easy to get and are beneficial for industrialization; in the synthetic process, the temperature is controlled to be 50 to 100 DEG C, the protective gas is nitrogen, a conventional method including filtration, distillation, recrystallization and the like is adopted in post-treatment, the product purity is high, and the purity of HPLC is greater than orequal to 98%. A liquid crystal display element with a liquid crystal aligned film formed by using the compound has the characteristics of high voltage retention rate, high light resistance and high heat resistance, the characteristic of rapid photoelectric response can be developed, the phenomenon of display view residue is inhibited, the specific resistance is high, and high-grade TFT liquid crystal display can be met.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal display, and in particular relates to a liquid crystal alignment agent compound and a preparation method thereof. Background technique [0002] In the liquid crystal display original, in order to align the liquid crystal molecules in a certain direction relative to the substrate surface, an alignment film is spin-coated and cured on the substrate surface, and a film with a certain direction and a pre-tilt angle is formed by rubbing. However, friction is easy to generate dust and static electricity. When it is used on the substrate of high-end TFT components, it cannot be used on TFT displays due to the damage of TFT components and the reduction of voltage retention due to the generated static electricity. Therefore, as a liquid crystal display unit Alignment materials, a photo-alignment method for liquid crystal alignment layers is proposed by using radiation-sensitive organic materials for...

Claims

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Application Information

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IPC IPC(8): C09K19/56C07C69/618C07C67/14
CPCC09K19/56C07C51/353C07C51/60C07C67/14C07C69/618C07C57/48C07C57/74
Inventor 初金军丰佩川肖策王晓彬杨浩丁立岩李通昊马胜刚刘美丽
Owner 烟台丰鲁精细化工有限责任公司
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