Check patentability & draft patents in minutes with Patsnap Eureka AI!

Polyimide film, optical film, image display device and preparation method of polyimide film

A polyimide film and polyimide technology, applied in the field of optical materials, can solve the problems of difficult product processing and limited application, and achieve the effects of colorless and transparent mechanical properties, excellent mechanical properties, and high glass transition temperature

Active Publication Date: 2019-12-31
浙江中科玖源新材料有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main chain of this type of polyimide has high rigidity, good heat resistance, and good mechanical properties at high and low temperatures, but due to the rigid structure of the main chain, it is insoluble, which brings certain difficulties to product processing; and due to intramolecular or molecular The charge transfer complex between them makes it have a certain color, which also limits the application in the field of optics
[0003] In recent years, studies based on fluorine-containing sulfone-containing aromatic polyimides have shown that polyimides can increase their solubility in organic solvents while maintaining high thermal stability, greatly enhance the processability of materials, and avoid polyimides. The light scattering of imides due to the holes left in the polymer due to dehydration during the thermal imidization process, but this type of polyimide has not yet disclosed that it has excellent light transmittance for visible light. It is particularly urgent to obtain a polyimide film with both heat resistance and light transmittance

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
  • Polyimide film, optical film, image display device and preparation method of polyimide film
  • Polyimide film, optical film, image display device and preparation method of polyimide film
  • Polyimide film, optical film, image display device and preparation method of polyimide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of polyimide film, its preparation method comprises:

[0044] S1. Under a nitrogen atmosphere, dissolve 10mmol of 9,9'-spirobis[9H-fluorene]-2,2'-diamine as a diamine monomer raw material in 28ml of N,N-dimethylacetamide solvent In, stir until completely dissolved, add 10mmol 1,2,4,5-cyclohexanetetracarboxylic dianhydride as the tetracarboxylic dianhydride monomer raw material, continue to stir until completely dissolved, and obtain a homogeneous compound with a solid content of 20wt%. phase solution, and reacted at 5°C for 8 hours to obtain a polyamic acid solution; add 9.5ml of pyridine as an imidization agent to the polyamic acid solution, add 0.98ml of acetic anhydride as a dehydrating agent after the dispersion is complete, and again After stirring for 24 hours, transfer the reaction solution to the dropping funnel, drop it into a beaker with a large amount of ethanol at a rate of 2-3 drops / second to form a precipitate, then wash it three times at 70°C, and ...

Embodiment 2

[0047] A kind of polyimide film, the preparation method of this polyimide film is the same as in embodiment 1, except in the polyimide resin synthesis of step S1, add 10mmol 1,2,3,4-cyclobutane Tetracarboxylic dianhydride is used as tetracarboxylic dianhydride monomer raw material to obtain polyimide resin (M w =62kDa, PDI=1.24), and the relevant performance test results of the polyimide thin film thus obtained are shown in Table 1.

Embodiment 3

[0049] A polyimide film, the preparation method of the polyimide film is the same as in Example 1, except that in the polyimide resin in step S1, 10mmol bicyclo[2.2.1]heptane-2,3 is added, 5,6-tetracarboxylic dianhydride is used as tetracarboxylic dianhydride monomer raw material, and is dissolved in the solvent of the N of 29ml, N-dimethylacetamide, obtains polyimide resin (M w =58kDa, PDI=1.39), and the relevant performance test results of the obtained polyimide thin film are shown in Table 1.

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

PropertyMeasurementUnit
Mwaaaaaaaaaa
Mwaaaaaaaaaa
Login to View More

Abstract

The invention provides a polyimide film, wherein the transmittance of light with the wavelength of 400 nm reaches 85% or above, and simultaneously, the glass transition temperature is also 370 DEG C or above. Meanwhile, the invention also provides that the polyimide film is used for an optical film, as well as used for articles and components with high requirements on light transmittance and heatresistance, such as an image display device.

Description

technical field [0001] The invention relates to the technical field of optical materials, in particular to a polyimide film, an optical film, an image display device and a preparation method thereof. Background technique [0002] In the field of optoelectronics, polymer materials, especially colorless and transparent polymer materials, can be used in products such as photosensors, flexible displays, and solar cells. The main requirements for polymer materials used in the optoelectronic field are optical transparency, mechanical properties and heat resistance. The most common ones that meet this requirement are polyimide materials, and the most typical polyimide materials are Linear polyimide synthesized from pyromellitic dianhydride and 4,4'-diaminodiphenyl ether. The main chain of this type of polyimide has high rigidity, good heat resistance, and good mechanical properties at high and low temperatures, but due to the rigid structure of the main chain, it is insoluble, whi...

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): C08J5/18C08L79/08C08G73/10G02B1/04
CPCC08J5/18G02B1/04C08G73/1007C08G73/1078C08G73/1039C08G73/1042C08J2379/08
Inventor 李南文许辉
Owner 浙江中科玖源新材料有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com