Negative liquid crystal composition and application thereof

A technology of liquid crystal composition and negative liquid crystal, which is applied in the field of dielectric negative liquid crystal composition and negative liquid crystal composition, can solve problems such as reducing the response time of liquid crystal, and achieve good low-temperature mutual solubility, wide applicability, dielectric Moderate effect of anisotropy and refractive index anisotropy

Pending Publication Date: 2022-03-25
重庆汉朗精工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As people have higher and higher requirements for the response time of liquid crystal displays, simply relying on changing the mode to achieve fast response can no longer meet the requirements, so how to reduce the response time of liquid crystals has become a difficult point for PSVA display, specifically, the response of liquid crystal displays The time depends on the rotational viscosity and elastic constant of the liquid crystal composition

Method used

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  • Negative liquid crystal composition and application thereof
  • Negative liquid crystal composition and application thereof
  • Negative liquid crystal composition and application thereof

Examples

Experimental program
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Embodiment 1

[0128] Compound 3C (1) PWO2 (I-1-18) synthesis, its specific preparation process is as follows:

[0129]

[0130] (1) Synthesis of 3C(1,V)P-Br

[0131] Add 37.7g of p-dibromobenzene to 300mlTHF, cool down to -70°C, add 100ml of butyllithium solution dropwise, continue methane at -70°C for 1h, add 23.7g of 3C(1)K solution in 30mlTHF dropwise, and control the dropping time The temperature is between -70 and -65°C. Then slowly raise the temperature to 0°C, slowly pour into 1000ml of water, extract with 400ml of toluene, wash the organic layer with dilute hydrochloric acid, wash with aqueous sodium bicarbonate, wash with water, and dry.

[0132] Add 0.4 g of p-toluenesulfonic acid to the obtained solution, raise the temperature and reflux for water separation for 4 hours, cool to room temperature, add 200 ml of water toluene 100 for extraction and separate layers, and post-treatment to obtain 28 g of 3C(1,V)P-Br as an oil. Molecular formula C 16 h 21 Br, GC-MS: 292.1.

[013...

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Abstract

The invention relates to a negative liquid crystal composition and application thereof, and belongs to the field of liquid crystal materials. The negative liquid crystal composition comprises at least one compound with a 2-substituted-1, 4-dicyclohexylbiphenyl structure as shown in a general formula I, at least one compound as shown in a general formula II and at least one compound as shown in a general formula III. The adopted compounds have good low-temperature intersolubility and moderate dielectric anisotropy and refractive index anisotropy. The negative liquid crystal composition is good in low-temperature intersolubility and large in elastic constant, and the response time is shortened.

Description

technical field [0001] The invention relates to a negative liquid crystal composition and its application, in particular to a dielectric negative liquid crystal composition containing a compound of 2-substituted-1,4-dicyclohexylbiphenyl structure and its application, belonging to liquid crystal materials field. Background technique [0002] Liquid crystal display elements using liquid crystal compositions are widely used in displays of watches, calculators, word processors, and the like. These liquid crystal display elements utilize the refractive index anisotropy, dielectric anisotropy, etc. of liquid crystal compounds. [0003] A liquid crystal display element contains a liquid crystal composition having suitable physical properties. The general physical properties necessary for the liquid crystal compound as a component of the liquid crystal composition are as follows: [0004] (1) chemical stability and physical stability; [0005] (2) High-definition bright spots (p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44G02F1/137
CPCC09K19/44G02F1/13712
Inventor 史志兵孙刚
Owner 重庆汉朗精工科技有限公司
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