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Soluble polyimide film with high refractive index

A polyimide film, high refractive index technology, applied in the field of polymer materials, can solve the problems of inability to meet heat-resistant coloring, low birefringence, complex manufacturing process, etc., and achieve high glass transition temperature and thermal stability. The effect of high stability, simple preparation process and superior solubility

Active Publication Date: 2014-05-07
JIANGSU YABAO INSULATION MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is expensive and complicated to manufacture
[0006] ②Methyl methacrylate, an optical plastic, is colorless and transparent and has a low birefringence, but has poor heat resistance
However, because PET is not resistant to high temperature, the polymer is volatile in use
[0008] ④ Although polycarbonate has a high glass transition temperature, it still cannot meet the requirements of heat resistance and coloring, and the birefringence is also large.
[0009] ⑤Although polyimide film is widely used due to its excellent comprehensive performance, ordinary aromatic polyimide resin has a high aromatic ring density, which makes the film yellowish brown and seriously affects its light transmission in the visible light range. Rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of soluble high refractive index polyimide film is prepared according to the following steps:

[0027] (1) At room temperature, mix 5366.1g 4-(9-(4-aminophenyl)-2,7-bis(4-fluorophe nyl)-9H-fluoren-9-yl)benzonamine and 57300g N,N-dimethylformamide Add it to a 100L reaction kettle, blow in argon, stir, and after it is completely dissolved, add 3222.3g of 3,3',4,4'-benzophenone tetraacid dianhydride, continue to stir and react for 6 hours, and obtain a homogeneous, transparent and viscous Polyamic acid solution, after cooling, pour the reaction solution into ethanol to precipitate, and make polyimide resin;

[0028] (3) Dried 15 kg of Osmanthus fragrans in the sun, pulverized, heated and refluxed with 100 L of water to extract three times, combined the three extracts, concentrated under reduced pressure, centrifuged, took solid matter, and dried to prepare.

[0029] (4) Add 400g of sweet rhinoceros extract to the synthesized polyimide resin, stir at a high speed, a...

Embodiment 2

[0034] A kind of soluble high refractive index polyimide film is prepared according to the following steps:

[0035] (1) At room temperature, mix 6366.3g 4-(9-(4-am i no phen y1)-2,7-bis(4-(trifluoromethyl)phenyl)-9H-fluoren-9-yl)benzonamine and 63900g dimethylacetamide Add it into a 100L reaction kettle, blow in argon, stir, and after it is completely dissolved, add 3222.3g of 3,3',4,4'-benzophenone tetraacid dianhydride, continue to stir and react for 6 hours, and obtain a homogeneous, transparent and viscous The polyamic acid solution, after cooling, the reaction solution is poured into ethanol to precipitate, and polyimide resin is made;

[0036] (2) Dried 18 kg of Osmanthus fragrans in the sun, pulverized, heated and refluxed with 100 L of water to extract three times, combined the three extracts, concentrated under reduced pressure, centrifuged, took solid matter, and dried to prepare.

[0037] (3) Add 500g of sweet rhinoceros extract to the synthesized polyimide resin,...

Embodiment 3

[0042] A kind of soluble high refractive index polyimide film is prepared according to the following steps:

[0043] (1) At room temperature, mix 5366.1g of 4-(9-(4-aminophenyl)-3,6-bis(4-fluorophen yl)-9H-fluoren-9-yl)benzonamine and 51100g of N,N-dimethylformamide Add it into a 100L reaction kettle, pass in argon, stir, and after it is completely dissolved, add 2902.7g of biphenyltetracarboxylic dianhydride and continue stirring for 6 hours to obtain a homogeneous transparent and viscous polyamic acid solution. After cooling, the reaction The liquid is poured into ethanol to precipitate, and polyimide resin is made;

[0044] (2) Dried 13 kg of Osmanthus fragrans in the sun, pulverized, heated and refluxed with 100 L of water to extract three times, combined the three extracts, concentrated under reduced pressure, centrifuged, took solid matter, and dried to prepare.

[0045] (3) Add 350g of sweet rhinoceros extract to the synthesized polyimide resin, stir at a high speed, a...

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PUM

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Abstract

The invention discloses a soluble polyimide film with a high refractive index, belonging to the technical field of high molecular materials. The soluble polyimide film mainly comprises polyimide and a sweet clover extract. The polyimide film disclosed by the invention has excellent resolvability and can be dissolved into conventional organic solvents such as N-methylpyrrolidone, dimethyl sulfoxide, N, N-dimethylacetamide, N, N-dimethylformamide, m-cresol, tetrahydrofuran and the like; due to the addition of the sweet clover extract, the refractive index of the material is increased, the light transmittance performance of the material is improved, and the material has relatively high glass transition temperature and thermal stability and excellent mechanical properties; meanwhile, the preparation process is simple and varied and low in condition requirement so as to be suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a soluble high-refractive-index polyimide film. Background technique [0002] In recent years, the development of luminescent materials has developed rapidly. As sealing materials for photoelectric conversion elements such as light-emitting diodes (LEDs) and photosensors, which are widely used, they are required to be colorless, transparent, easy to mold, and good heat resistance. With the high luminance of LEDs and the popularization of blue and ultraviolet short-wave light-emitting materials, the heat resistance and light resistance of conventional epoxy resins have been insufficient. Coloring during use, yellowing occurs, and it is difficult to maintain a colorless and transparent state for a long time. [0003] Flexible solar cell substrates can be made of stainless steel foil and thin film. Stainless steel substrates have the advantages of low cost an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08K11/00C08G73/10C08J5/18
CPCC08G73/1075C08J5/18C08J2375/10C08K11/00C08L2201/10C08L2203/16C08L79/08
Inventor 徐伟伟杨楚罗李秋影刘战合
Owner JIANGSU YABAO INSULATION MATERIAL
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