Preparation method of epoxy resin-based polymer dispersion liquid crystal film material

A technology for dispersing liquid crystals and epoxy resins, applied in liquid crystal materials, epoxy resin adhesives, chemical instruments and methods, etc., can solve the problems of poor toughness of PDLC films, affecting product economic benefits, reducing product yields, etc. junction properties, reducing off-state transmittance, and enhancing peel strength

Active Publication Date: 2013-04-24
扬州晶彩光电科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the cured film of the polymer network / liquid crystal composite material is brittle, resulting in poor toughness of the PDLC film, and the combination between the polymer network and the conductive plastic film coated with indium tin oxide (ITO) is not tight enough, which hinders large-scale production. It has brought great difficulties, seriously reduced the yield of products, and also affected the economic benefits of products

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of epoxy resin-based polymer dispersion liquid crystal film material
  • Preparation method of epoxy resin-based polymer dispersion liquid crystal film material
  • Preparation method of epoxy resin-based polymer dispersion liquid crystal film material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The selected thermal polymerization monomer is aliphatic glycidyl ether epoxy resin - polyethylene glycol diglycidyl ether EGDE (Anhui Hengyuan Chemical Co., Ltd.), liquid crystal SLC1717 (Shijiazhuang Yongsheng Huaqing Liquid Crystal Co., Ltd.), curing agent 1,8-Diamino-3,6-dioxaoctane EDBEA (Alfa Aesar), glass microspheres (SP-200, Sekisui chemical Co.LTD.). The mass ratio of EGDE / curing agent / liquid crystal is 48.0 / 12.0 / 40.0, and the mixture of thermopolymerization monomer, liquid crystal and curing agent is evenly sandwiched between two layers of conductive plastic films coated with ITO, and cured in a drying oven at a constant temperature of 70°C for 8 After 1 hour, the PDLC film to be prepared was obtained. figure 1 It is a scanning electron microscope picture of the PDLC thin film prepared in Example 1.

Embodiment 2

[0021] The selected thermal polymerization monomers are aliphatic glycidyl ether epoxy resins - polyethylene glycol diglycidyl ether EGDE, trimethylolpropane triglycidyl ether TMPTGE (Nanjing Kangmanlin Chemical Industry Company), liquid crystal SLC1717, curing agent 1,8-Diamino-3,6-dioxaoctane EDBEA (Alfa Aesar), glass microspheres (SP-200, Sekisui chemical Co.LTD.). EGDE / TMPTGE / curing agent / liquid crystal are mixed evenly according to the mass ratio of 20.0 / 25.0 / 15.0 / 40.0. The thermally polymerizable monomer, liquid crystal, and curing agent mixture were evenly sandwiched between two layers of ITO-coated conductive plastic films, and cured in a drying oven at a constant temperature of 80°C for 6 hours to obtain the PDLC film to be prepared. figure 2 It is a scanning electron microscope picture of the PDLC thin film prepared in Example 2.

Embodiment 3

[0023] The thermally polymerizable monomers selected are aliphatic glycidyl ether epoxy resins - polyethylene glycol diglycidyl ether EGDE, pentaerythritol glycidyl ether PERTGE (Ruiying Pharmaceutical Co., Ltd.), liquid crystal SLC1717, curing agent 1, 8-di Amino-3,6-dioxaoctane EDBEA (Alfa Aesar), glass microspheres (SP-200, Sekisui chemical Co.LTD.). EGDE / PERTGE / curing agent / liquid crystal are mixed evenly according to the mass ratio of 25.0 / 17.0 / 18.0 / 40.0. The thermally polymerizable monomer, liquid crystal, and curing agent mixture were evenly sandwiched between two layers of ITO-coated conductive plastic films, and cured in a drying oven at a constant temperature of 80°C for 6 hours to obtain the PDLC film to be prepared. image 3 It is a scanning electron microscope picture of the PDLC thin film prepared in Example 3.

[0024] Figure 4For the change curve of the electro-optical performance of the PDLC thin film prepared by all embodiments, wherein curve 1 is the elec...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the field of application of liquid crystal materials, and particularly relates to a preparation method of an epoxy resin-based polymer dispersion liquid crystal film material. The preparation method comprises the following steps of: uniformly mixing liquid crystals, a thermal polymerization monomer, a curing agent and glass microspheres and clamping the mixture between two tin indium oxide-plated conductive films; uniformly pressing with a rolling shaft to form a film layer of which the thickness is 20-30 microns, wherein the liquid crystals account for 40 percent by mass of the total mass of the mixture, the curing agent accounts for 20-30 by mass of the total mass of the thermal polymerization monomer, and the glass microspheres account for 0.1-0.5 percent by mass of the total mass of the mixture; and thermally curing at the temperature 70-80 DEG C for 6-8 hours to obtain the polymer dispersion liquid crystal film. According to the preparation method, the crosslinking density of a polymer is increased, the meshes of the polymer are reduced, the open state transmission is lowered, the contrast is increased, and the electro-optic performance of the polymerdispersion liquid crystal film is improved. Moreover, the content of the liquid crystals is reduced, and the preparation cost is reduced greatly.

Description

technical field [0001] The invention belongs to the application field of liquid crystal materials, and relates to a preparation method of a PDLC film material, in particular to a preparation method of an epoxy resin-based polymer dispersed liquid crystal film material. Background technique [0002] Polymer Dispersed Liquid Crystal (PDLC) is an electro-optic thin film material. The PDLC film is a physical and chemical method that precipitates liquid crystals from the mixture mixed with the prepolymer, and distributes them in the solid transparent polymer matrix in the form of micron-sized droplets. Between two substrates coated with indium tin oxide (Indium-tin oxide, ITO) conductive layer is a certain thickness of PDLC film, liquid crystal droplets are randomly distributed in the polymer network, and present a certain self-organized configuration . The optical axis of each liquid crystal particle is in a preferred orientation, while the optical axes of different part...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/20C08G59/22C08G59/32C08G59/50C08K13/04C08K7/20C08J5/18C09J163/00C09K19/54G02F1/1334
Inventor 杨槐张婷婷曹晖鹿岛美纪刘芳宋平赵秀婷张翠红
Owner 扬州晶彩光电科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap