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A kind of soluble high refractive index polyimide film

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: 2016-03-30
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 soluble high refractive index polyimide film is prepared according to the following steps:

[0027] (1) At room temperature, add 5366.1g 4-(9-(4-aminophenyl)-2,7-bis(4-fluorophenyl)-9H-fluoren-9-yl)benzenamine and 57300gN,N-dimethylformamide To a 100L reaction kettle, put argon gas into it, stir and dissolve completely, add 3222.3g 3,3′,4,4′-benzophenonetetracarboxylic dianhydride, continue to stir and react for 6h to obtain a homogeneous transparent viscous poly The amic acid solution, after cooling, pour the reaction solution into ethanol to precipitate out and make a polyimide resin;

[0028] (3) 15 kg of osmanthus sylvestris was dried in the sun, pulverized, and then heated and refluxed with 100L of water for three times, the three extracts were combined, concentrated under reduced pressure, centrifuged, and the solid matter was collected and dried.

[0029] (4) Add 400g of Molini extract to the synthetic polyimide resin, stir at high speed, adjust the speed to 2000rpm,...

Embodiment 2

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

[0035] (1) At room temperature, add 6366.3g 4-(9-(4-aminopheny1)-2,7-bis(4-(trifluoromethyl)phenyl)-9H-fluoren-9-yl)benzenamine and 63900g dimethylacetamide Into a 100L reactor, pour argon gas, stir, and after dissolving completely, add 3222.3g 3,3′,4,4′-benzophenonetetracarboxylic dianhydride, continue to stir and react for 6h to obtain a homogeneous transparent viscous Polyamic acid solution, after cooling, pour the reaction solution into ethanol to precipitate out to make polyimide resin;

[0036] (2) 18 kg of osmanthus sylvestris was dried in the sun, pulverized, and then heated and refluxed with 100L of water for three times, the three extracts were combined, concentrated under reduced pressure, centrifuged, and the solid matter was collected and dried.

[0037] (3) Add 500g of Molini extract to the synthetic polyimide resin, stir at high speed, adjust the speed to 2000rpm, sti...

Embodiment 3

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

[0043] (1) At room temperature, add 5366.1g 4-(9-(4-aminophenyl)-3,6-bis(4-fluorophenyl)-9H-fluoren-9-yl)benzenamine and 51100gN,N-dimethylformamide Into a 100L reactor, let argon gas flow, stir, and after dissolving completely, add 2902.7g of biphenyltetracarboxylic dianhydride, continue to stir and react for 6h to obtain a homogeneous, transparent and viscous polyamic acid solution. After cooling, the reaction liquid Pour into ethanol to precipitate and make polyimide resin;

[0044] (2) 13 kg of osmanthus sylvestris was dried, crushed, and then heated and refluxed with 100L of water for three times, the three extracts were combined, concentrated under reduced pressure, centrifuged, solid matter was taken, and dried.

[0045] (3) Add 350g of Molini extract to the synthesized polyimide resin, stir at high speed, adjust the speed to 2000rpm, stir for 1-2h, and make a membrane liquid...

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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 specifically relates to a soluble high refractive index polyimide film. Background technique [0002] In recent years, the development of light-emitting materials has been rapidly developed. As a sealing material for photoelectric conversion elements such as light-emitting diodes (LEDs) and photosensors, which are widely used, it is required to be colorless, transparent, easy to mold, and have good heat resistance. With the increase in the brightness of LEDs and the popularization of blue and ultraviolet short-wave luminescent 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] The flexible solar cell substrate can be stainless steel foil and thin film. Stainless steel substrate has advantages such as low c...

Claims

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Application Information

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Patent Type & Authority Patents(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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