Polymer disperse dye liquid crystal material, electrochromic dimming film and preparation method

A technology of disperse dyes and liquid crystal materials, applied in the field of dimming films, can solve the problems of poor weather resistance, poor product performance, fading, etc., and achieve the effects of good adhesion performance, easy processing into film, and low haze.

Active Publication Date: 2021-02-19
ZHUHAI SINGYES NEW MATERIALS TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing PDLC commonly uses light-curable glue, which can be quickly cured under UV irradiation to improve the production efficiency of PDLC films. During the reaction process, the dichroic dye has a strong absorption of UV, and enters the excited state after absorbing UV. The dye in the excited state and the functional group of the dye itself are easy to react with the free radicals of the photocurable glue and easily decompose, resulting in product performance. Poor, fading phenomenon, poor weather resistance

Method used

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  • Polymer disperse dye liquid crystal material, electrochromic dimming film and preparation method

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Experimental program
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Effect test

Embodiment 1

[0040] The electrochromic light-emitting film of this embodiment is prepared through the following steps:

[0041] Step 1: Select a colorless and transparent PET substrate with a thickness of 125 μm, the visible light transmittance of the transparent PET substrate is 89%, and the haze is 0.6%;

[0042] Step 2: Coating an ITO film on a colorless and transparent PET substrate by magnetron sputtering, with a square resistance of 100Ω / □, a visible light transmittance of 82%, and a haze of 0.7%;

[0043] Step 3: Coating an alignment layer on the ITO film, the alignment layer material is polyimide material, the thermal curing temperature is 120°C, the curing time is 5 minutes, and the thickness of the alignment layer after curing is 50nm;

[0044] Step 4: Prepare the dye liquid crystal material, wherein the color of the dye liquid crystal is black, the birefringence Δn is 0.11, the ordinary refractive index no (589nm, 25°C) is 1.478, and the dielectric anisotropy of the liquid cryst...

Embodiment 2

[0066] The electrochromic light-emitting film of this embodiment is prepared through the following steps:

[0067] Step 1: Select a black transparent PET base material with a thickness of 50 μm, the visible light transmittance of the transparent PET base material is 60%, and the haze is 0.9%;

[0068] Step 2: Coating an ITO film on a black transparent PET substrate by magnetron sputtering, with a square resistance of 150Ω / □, a visible light transmittance of 54%, and a haze of 0.9%;

[0069] Step 3: Coating an alignment layer on the ITO film, the alignment layer material is polyimide material, the thermal curing temperature is 100°C, the curing time is 6 minutes, and the thickness of the alignment layer after curing is 10nm;

[0070] Step 4: Prepare the dye liquid crystal material, wherein the color of the dye liquid crystal is black, the birefringence Δn is 0.18, the ordinary refractive index no (589nm, 25°C) is 1.50, and the dielectric anisotropy of the liquid crystal △ε (1KH...

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Abstract

The invention relates to a polymer disperse dye liquid crystal material, an electrochromic dimming film and a preparation method, the polymer disperse dye liquid crystal material comprises a dye liquid crystal composition and thermocuring glue, the dye liquid crystal composition comprises a negative liquid crystal and a dichroic dye, the thermocuring glue comprises the following components by masspercentage: 40-60% of epoxy resin, 1-5% of a reactive diluent, 0.5-1% of a coupling agent, 5-15% of an amine curing agent, 5-15% of an imidazole curing agent and 4-10% of a curing accelerator. The polymer disperse dye liquid crystal material and the electrochromic dimming film prepared from the polymer disperse dye liquid crystal material are excellent in aging resistance, transparent in power failure, capable of being frosted after being powered on and shading light, capable of achieving roll-to-roll production and laser heating curing and high in production efficiency.

Description

technical field [0001] The invention relates to the technical field of dimming films, in particular to a liquid crystal material of a polymer disperse dye, an electrochromic light-adjusting film and a preparation method of an electrochromic light-adjusting film. Background technique [0002] Polymer dispersed liquid crystal dimming film, namely PDLC dimming film, mainly uses voltage to control the alignment state of liquid crystals, thereby adjusting the transparency of the film. PDLC dimming film is usually frosted when power is off, and transparent when power is on, that is, when the power is off, the liquid crystal material in the polymer dispersed liquid crystal layer is disorderly arranged, light is scattered when passing through the film, and the dimming film is opaque, while the power is on When , the electric field makes the liquid crystal material arranged in an orderly manner, light can directly pass through the film, and the dimming film is in a transparent state....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1334G02F1/1516C09K9/02C09K19/38
CPCG02F1/1334G02F1/15165C09K9/02C09K19/38C09K2211/145
Inventor 吴琴李唯段嘉明陈焙才汤立文
Owner ZHUHAI SINGYES NEW MATERIALS TECH CO LTD
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