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Polymer dispersed liquid crystal material and manufacturing method thereof

A technology for dispersing liquid crystals and polymers, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of low adhesion, non-brightness of thin notes, and low contrast

Active Publication Date: 2019-03-05
SHENZHEN POLICRAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the contradictory problems of the current bistable liquid crystal handwriting film that the thin notes are not bright, the bright handwriting is too thick, and the technical problems such as low contrast, high driving voltage, and low adhesion. , Only use the idea of ​​photo-curing monomer, you can get a liquid crystal handwriting film with moderate thickness and ultra-high brightness

Method used

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  • Polymer dispersed liquid crystal material and manufacturing method thereof
  • Polymer dispersed liquid crystal material and manufacturing method thereof
  • Polymer dispersed liquid crystal material and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] This embodiment provides a polymer dispersed liquid crystal material, which comprises the following components by weight: cholesteric liquid crystal (78%), photocurable monomer (20%), photoinitiator ( 0.4%), spacer particles (0.5%), solvent (1%), coupling agent (0.1%).

[0035] The birefringence Δn≧0.16 of the cholesteric liquid crystal.

[0036] The photocurable monomer comprises 4-hydroxybutyl vinyl ether (12%), ethoxylated trimethylolpropane triacrylate (8%), wherein the 4-hydroxybutyl vinyl ether structural formula is as follows:

[0037]

[0038] The structural formula of the ethoxylated trimethylolpropane triacrylate is as follows:

[0039]

[0040] The photoinitiator includes 4-(phenylthio)phenyldiphenylsulfonium hexafluorophosphate (0.1%), 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (0.3%) ), wherein the 4-(phenylthio)phenyldiphenylsulfonium hexafluorophosphate structural formula is as follows:

[0041]

[0042] The structural formula of the 2,4,6...

Embodiment 2

[0056] This embodiment provides a polymer dispersed liquid crystal material, which comprises the following components by weight: 70% cholesteric liquid crystal, photocurable monomer (23%), 0.7% photoinitiator, Spacer particles 1%, solvent 5%, coupling agent 0.3%.

[0057] The birefringence Δn≧0.16 of the cholesteric liquid crystal.

[0058] The photocurable monomer comprises cyclotrimethylolpropane formal acrylate (15%), triethylene glycol divinyl ether (6%), trimethylpropane trimethacrylate (2%), Wherein said cyclotrimethylolpropane methylal acrylate structural formula is as follows:

[0059]

[0060] Described triethylene glycol divinyl ether structural formula is as follows:

[0061]

[0062] Described trimethylpropane trimethacrylate structural formula is as follows:

[0063]

[0064] The photoinitiator includes 0.2% of 4-isobutylphenyl-4'-methylphenyliodonium hexafluorophosphate, 0.5% of ethyl 2,4,6-trimethylbenzoylphenylphosphonate , wherein the structural for...

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Abstract

The invention provides a polymer dispersed liquid crystal material and a manufacturing method thereof. The material comprises the following components by weight: 40 to 85% of cholesteric phase liquidcrystal, 7% to 59.75% of a photocuring monomer, 0.05 to 1% of a photoinitiator, 0.05 to 1% of a spacer, 0.1 to 5% of a solvent and 0.05 to 1% of a coupling agent. The invention also discloses the manufacturing method for the material. The polymer dispersed liquid crystal material provided by the invention has the following advantages: the polymer dispersed liquid crystal material can sense pressure to generate handwriting, so the function of handwriting is realized; the handwriting is maintained without the need of continuous power supply, and can be removed by applying of an electric field; and the polymer dispersed liquid crystal material has the characteristics of high brightness, high contrast, moderate handwriting thickness and the like, can be used as a handwriting film, is applied to the industry of liquid crystal handwriting plates, and has huge application space in the fields of writing, painting, teaching, etc.

Description

technical field [0001] The invention belongs to display materials, and in particular relates to a bistable liquid crystal handwriting film material and a manufacturing method thereof. Background technique [0002] In the field of liquid crystal display, based on the handwriting function of cholesteric bistable liquid crystal and the energy-saving characteristics of maintaining display without continuous power supply, it has been more and more widely used in the field of handwriting tablets. [0003] Cholesteric liquid crystals for display have two stable states, FC state and P state. When pressed, it turns into P state. At this time, it can reflect a fixed wavelength relationship, and the appearance shows handwriting. After applying an electric field, P state changes back to FC state. , showing a transparent state, and the handwriting is cleared. [0004] If the liquid crystal and the polymer are mixed and dissolved together, and then cured by heating or ultraviolet light, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/36G02F1/1334G02F1/137C08F216/14C08F220/28C08F216/12C08F220/20C08F2/50
CPCC08F2/50C08F216/14C08F220/28C09K19/36C08F220/282G02F1/1334G02F1/13718C08F220/285C08F216/125C08F220/20
Inventor 吴飞袁玲玉佘勇
Owner SHENZHEN POLICRAL TECH CO LTD
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