Polymer dispersed liquid crystal material and method for preparing liquid crystal films from same

A technology for dispersing liquid crystals and polymers, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve the problems of loss of scattered light, inability to store for a long time, polymer aggregation, etc., and achieve good light transmission effect, uniform distribution, low Effect of driving voltage

Active Publication Date: 2010-06-02
青岛诚志光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing polymer-dispersed liquid crystal materials generally have the disadvantages of high driving voltage and long-term storage. After long-term storage, the polymer will aggregate and lose the property of dispersing light.

Method used

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  • Polymer dispersed liquid crystal material and method for preparing liquid crystal films from same
  • Polymer dispersed liquid crystal material and method for preparing liquid crystal films from same
  • Polymer dispersed liquid crystal material and method for preparing liquid crystal films from same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] TMPTMP 32 parts by weight

[0052] EOEOEA 33 parts by weight

[0053] CN985B88 30 parts by weight

[0054] I-184 5 parts by weight

[0055] Z-1 1 parts by weight

[0056] Mix the above-mentioned components uniformly to prepare a composition for preparing polymer-dispersed liquid crystals; then mix the composition with liquid crystal LC-001 to form a polymer-dispersed liquid crystal mixture, and obtain the liquid crystal containing liquid crystal of the present invention for preparing A mixture of polymer dispersed liquid crystal films. The parts by weight of the composition and the liquid crystal in the mixture are 100 parts respectively.

[0057] When manufacturing the above mixture, a small amount of SPACER can also be added to the prepared polymer-dispersed liquid crystal composition together with the liquid crystal, and the particle size of the SPACER is 20 microns. Of course, it is also possible to add SPACER and mix evenly before producing the PDLC film after...

Embodiment 2

[0060] TMPTMP 20 parts by weight

[0061] EOEOEA 45 parts by weight

[0062] CN985B88 32 parts by weight

[0063] I-184 3 parts by weight

[0064] Z-1 1 parts by weight

[0065] The above-mentioned components are uniformly mixed to prepare a polymer-dispersed liquid crystal composition. Mix this composition with liquid crystal LC-001 and a small amount of SPACER to make a polymer-dispersed liquid crystal mixture. In the mixture, the weight parts of the composition and the liquid crystal are respectively 100 parts and 95 parts, and the particle diameter of the SPACER is 20 microns.

[0066] The above-mentioned liquid crystal-containing mixture used for preparing polymer-dispersed liquid crystals is uniformly coated between two pieces of ITO conductive glass, and pressed evenly with a roller. Use a strength of 8mw / cm at room temperature 2 10 minutes of ultraviolet light with a wavelength of 365nm is irradiated to obtain a cured PDLC film. The thickness of the PDLC film is...

Embodiment 3

[0068] TMPTMP 25 parts by weight

[0069] EOEOEA 40 parts by weight

[0070] CN985B88 30 parts by weight

[0071] I-184 7 parts by weight

[0072] Z-1 1 parts by weight

[0073] The above-mentioned components are uniformly mixed to prepare a polymer-dispersed liquid crystal composition. Mix this composition with liquid crystal LC-001 and a small amount of SPACER to make a polymer-dispersed liquid crystal mixture. In the mixture, the weight parts of the composition and the liquid crystal are 100 parts and 96 parts respectively, and the particle diameter of the SPACER is 20 microns.

[0074] Spread the above-mentioned mixture containing liquid crystal and SPACER evenly between two pieces of ITO conductive glass, and press it evenly with a roller. Use a strength of 15mw / cm at room temperature 2 1. UV light with a wavelength of 365nm was irradiated for 6 minutes to obtain a cured PDLC film. The thickness of the PDLC film is 20 micrometers, and the driving voltage is 40V. I...

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Abstract

The invention discloses a polymer dispersed liquid crystal material and a method for preparing liquid crystal thin films from the same, which belongs to the technical field of liquid crystal application. Thin films prepared can be widely applied in liquid crystal display, intelligent glass and other related fields. A polymer dispersed liquid crystal composition comprises 20 to 80 parts by weight of polymer monomer, 1 to 10 parts by weight of photoinitiator, 20 to 70 parts by weight of oligomer and 0.1 to 10 parts by weight of polymerization inhibitor, wherein the oligomer is at least one of epoxy acrylate oligomer, urethane acrylate oligomer, polyester acrylate oligomer, polyether acrylate oligomer and unsaturated polyester oligomer, and the polymer monomer is at least one of monofunctional-group (methyl) acrylate monomer, bifunctional-group (methyl) acrylate monomer and high-functional-group acrylate monomer with three or more functional groups. A PDLC thin film prepared from the mixture provided by the invention has high contrast, low driving voltage and good stability.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal applications, in particular to a polymer-dispersed liquid crystal composition, a polymer-dispersed liquid crystal mixture made of the composition, and a method for preparing a polymer-dispersed liquid crystal film from the mixture. The prepared film can be Widely used in liquid crystal display, smart glass and other related products. Background technique [0002] Polymer Dispersed Liquid Crystal (PDLC for short) film is a liquid crystal / polymer composite electro-optic material. PDLC film material is similar to traditional liquid crystal display (LCD for short), but has many differences from traditional liquid crystal display, such as: no polarizer is needed, the distance between the two substrates does not need to be strictly controlled, and the inner surface of the substrate does not need orientation treatment. The PDLC film can be switched between transparent and opaque states by adjusti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/54G02F1/1334
Inventor 刘文菊张胜茂田秋峰贵丽红范晓蕊于涛任惜寒
Owner 青岛诚志光电科技有限公司
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