Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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 glue, chemical instruments and methods, etc., can solve the problems of poor toughness of PDLC films, affect product economic benefits, reduce product yield, etc., and achieve improved adhesion Junction properties, reduced off-state transmittance, and enhanced peel strength

Active Publication Date: 2012-01-18
扬州晶彩光电科技有限公司
View PDF1 Cites 15 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

[0022] 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 beads (SP-200, Sekisui chemical Co. LTD.). The mass ratio of EGDE / curing agent / liquid crystal is 48.0 / 12.0 / 40.0. The mixture of thermally polymerized monomer, liquid crystal and curing agent is evenly sandwiched between two conductive plastic films coated with ITO, and cured in a drying oven at a constant temperature of 70°C. 8 After hours, the PDLC film to be prepared is obtained. figure 1 This is a scanning electron microscope picture of the PDLC film prepared in Example 1.

[0023]

Embodiment 2

[0025] The selected thermal polymerization monomer is aliphatic glycidyl ether epoxy resin——polyethylene glycol diglycidyl ether EGDE, trimethylolpropane triglycidyl ether TMPTGE (Nanjing Kangmanlin Chemical Industry Co., Ltd.), liquid crystal SLC1717, curing agent 1, 8-Diamino-3, 6-dioxaoctane EDBEA (Alfa Aesar), glass beads (SP-200, Sekisui chemical Co. LTD.). The mass ratio of EGDE / TMPTGE / curing agent / liquid crystal is 20.0 / 25.0 / 15.0 / 40.0 to be evenly mixed. The mixture of thermally polymerized monomer, liquid crystal, and curing agent is uniformly sandwiched between two conductive plastic films plated with ITO, 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 This is a scanning electron micrograph of the PDLC film prepared in Example 2.

[0026]

Embodiment 3

[0028] The selected thermal polymerization monomer is aliphatic glycidyl ether epoxy resin-polyethylene glycol diglycidyl ether EGDE, pentaerythritol glycidyl ether PERTGE (Ruiying Pharmaceutical Co., Ltd.), liquid crystal SLC1717, curing agent 1, 8-two Amino-3, 6-dioxa octane EDBEA (Alfa Aesar), glass beads (SP-200, Sekisui chemical Co. LTD.). The mass ratio of EGDE / PERTGE / curing agent / liquid crystal is 25.0 / 17.0 / 18.0 / 40.0 to be evenly mixed. The mixture of thermally polymerized monomer, liquid crystal, and curing agent is uniformly sandwiched between two conductive plastic films plated with ITO, 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 This is a scanning electron micrograph of the PDLC film prepared in Example 3.

[0029]

[0030] Figure 4 The electro-optical performance curve of the PDLC film prepared in all the examples. Curve 1 is the electro-optical performance curve of the PDLC film prepared...

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

[0001] Technical field [0002] 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 [0003] Polymer Dispersed Liquid Crystal (Polymer Dispersed Liquid Crystal: PDLC) is an electro-optical film material. The PDLC film is made by a certain physical and chemical method to make the liquid crystal precipitate from the mixture mixed with the prepolymer, and distributed in the solid transparent polymer matrix in the form of micron-sized droplets. Between two substrates coated with indium-tin oxide (ITO) conductive layer is a PDLC film of a certain thickness. The liquid crystal droplets are randomly distributed in the polymer network and exhibit a certain self-organized configuration. . The optical axis of each liquid crystal particle is in a preferred orientation, wh...

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
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 Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com