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Liquid crystal material and applications thereof

A liquid crystal material, general formula technology, applied in the field of materials, can solve problems such as low haze, low viscosity in industrial production, and application limitations

Active Publication Date: 2018-10-09
BEIJING BAYI SPACE LCD MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current dimming film also has shortcomings such as small working temperature range, poor shielding effect, high driving voltage, and easy cracking and degumming in the application, which limits its application.
[0005] There are many deficiencies in the existing liquid crystal materials for dimming films, such as low haze, small working temperature range, low viscosity in industrial production, unstable working conditions, etc.

Method used

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  • Liquid crystal material and applications thereof
  • Liquid crystal material and applications thereof
  • Liquid crystal material and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0117] The preparation of liquid crystal composition in the embodiment of the present invention all adopts following method:

[0118] The preparation of uniform liquid crystal adopts the thermal dissolution method commonly used in the industry. First, the liquid crystal compound is weighed by weight percentage with a balance. There is no specific requirement for the order of weighing and adding. Usually, the liquid crystal compound is weighed and mixed in order of melting point from high to low. Heat and stir at 60-90°C to dissolve and mix the components evenly, then filter, degas, and finally package to obtain the target sample.

[0119] Unless otherwise stated, percentages in this context are by weight and all temperatures are given in degrees Celsius. Use the following abbreviations:

[0120] Δn is optical anisotropy (20°C), Δε is dielectric anisotropy (25°C, 1kHz), η is bulk viscosity (mm 2 / s, 20°C), Cp is the clearing point (°C) of the liquid crystal composition.

Embodiment 1

[0122] The liquid crystal material components and formulations described in this embodiment are shown in Table 1.

[0123] Table 1: Components of Example 1

[0124] components

Embodiment 2

[0126] The liquid crystal material components and formulations described in this embodiment are shown in Table 2.

[0127] Table 2: Example 2 components

[0128] components

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PUM

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Abstract

The present invention relates to a liquid crystal material, which comprises, by weight, 1-85 parts of a compound represented by a general formula I, 1-70 parts of a compound represented by a general formula II, 0-30 parts of a compound represented by a general formula III, 0-40 parts of a compound represented by a general formula IV, 0-30 parts of a compound represented by a general formula V, 0-30 parts of a compound represented by a general formula VI, 0-30 parts of a compound represented by a general formula VII, and 0-30 parts of a compound represented by a general formula VIII. Accordingto the present invention, the liquid crystal material has characteristics of high optical anisotropy, high clearing point, good low-temperature performance, good on-state transmittance, good polymer mutual solubility and stable on-state gray scale, and has the viscosity of more than 100 mm<2< / s; the method is suitable for industrial production, and has high and stable yield; due to the scale effect, the application range can be greatly expanded; and the liquid crystal material can be used for preparing light-transmitting films and display devices, and has broad application prospects.

Description

technical field [0001] The invention relates to the field of materials, in particular to a liquid crystal material and its application. Background technique [0002] Dimming film is a new type of material that uses Polymer Dispersed Liquid Crystal (PDLC) technology to adjust the light transmission rate. It is a composite liquid crystal material with special photoelectric properties. The principle is that after the small molecule liquid crystal material is mixed with the polymer, the polymer undergoes phase separation under external action, and the liquid crystal molecules disperse from the mixture to form a dimming film or dimming glass with display or dimming function. The initiation conditions in the prior art are mainly thermal initiation and ultraviolet (UV) initiation. [0003] In the absence of an external electric field, the direction of the directors of the liquid crystals in different droplets is random, so the light-adjusting film exhibits a strong scattering effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/46C09K19/30C09K19/20C09K19/18G02F1/1334
CPCC09K19/18C09K19/2007C09K19/3001C09K19/3068C09K19/46C09K2019/181C09K2019/183C09K2019/2035C09K2019/3009C09K2019/3016C09K2019/3063C09K2019/3075C09K2019/3078C09K2019/3083G02F1/1334
Inventor 未欣王杰陈海光储士红陈卯先姜天孟郭云鹏袁瑾
Owner BEIJING BAYI SPACE LCD MATERIALS TECH