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Transparent polyimide material and preparation method thereof

A transparent polyimide, polyimide technology, applied in the direction of organic chemistry, to achieve the effect of low water absorption, inhibit the formation of CTC, and increase transparency

Active Publication Date: 2015-04-01
JIANGSU SUNERA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is still not possible to completely avoid the formation of CTCs

Method used

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  • Transparent polyimide material and preparation method thereof
  • Transparent polyimide material and preparation method thereof
  • Transparent polyimide material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation of embodiment 1 compound 2-(3,5-dinitrophenyl)-4,5,6,7-(tetrafluoroisoindoline)-1,3-dione

[0035] 60.7g (0.255mol) of tetrafluorophthalic acid, 46.7g (0.255mol) of 3,5-dinitroaniline, and 600g of acetic acid were successively added into a 1L three-necked flask, and the reaction solution was yellow and turbid. Turn on the mechanical stirring, heat up to 125°C, reflux the system, the raw materials gradually dissolve, and become almost clear liquid. During the heat preservation and reflux process, the system slowly appeared yellow solid and turned into yellow turbidity, and the heat preservation reaction was 8h. The reaction solution was yellow and turbid, and was suction filtered at room temperature to obtain a yellow solid, rinsed with absolute ethanol once, the color was lighter, and a light yellow solid was obtained, which was 2-(3,5-dinitrophenyl)-4,5 , 6,7-(tetrafluoroisoindoline)-1,3-dione, dried in a vacuum oven at room temperature for 4 hours, we...

Embodiment 2

[0037]60.7g (0.255mol) of tetrafluorophthalic acid, 46.7g (0.255mol) of 3,5-dinitroaniline, and 600g of acetic acid were successively added into a 1L three-necked flask, and the reaction solution was yellow and turbid. Turn on the mechanical stirring, heat up to 130°C, reflux the system, the raw materials gradually dissolve, and become almost clear liquid. During the heat preservation and reflux process, the system slowly appeared yellow solid and turned into yellow turbidity, and the heat preservation reaction was carried out for 10 hours. The reaction solution was yellow and turbid, and was suction filtered at room temperature to obtain a yellow solid, rinsed with absolute ethanol once, the color was lighter, and a light yellow solid was obtained, which was 2-(3,5-dinitrophenyl)-4,5 , 6,7-(tetrafluoroisoindoline)-1,3-dione, dried in a vacuum oven at room temperature for 4.5h, weighed 78.2g, yield 79.1%.

Embodiment 3

[0039] 60.7g (0.255mol) of tetrafluorophthalic acid, 46.7g (0.255mol) of 3,5-dinitroaniline, and 600g of acetic acid were successively added into a 1L three-necked flask, and the reaction solution was yellow and turbid. Turn on the mechanical stirring, heat up to 127°C, reflux the system, the raw materials gradually dissolve, and become almost clear liquid. During the heat preservation and reflux process, the system slowly appeared yellow solid and turned into yellow turbidity, and the heat preservation reaction was 9h. The reaction solution was yellow and turbid, and was suction filtered at room temperature to obtain a yellow solid, rinsed with absolute ethanol once, the color was lighter, and a light yellow solid was obtained, which was 2-(3,5-dinitrophenyl)-4,5 , 6,7-(tetrafluoroisoindoline)-1,3-dione, dried in a vacuum oven at room temperature for 4 hours, weighing 78g, yield 79%.

[0040] In Example 1-3, the characterization data of the prepared 2-(3,5-dinitrophenyl)-4,5...

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Abstract

The invention relates to a transparent polyimide material and a preparation method thereof. According to the preparation method, tetrafluorophthalic acid and 3,5-dinitraniline are taken as raw materials and are subjected to two-step reaction of acylation and hydrogenation to generate a diamine monomer, namely 2-(3,5-diaminodiphenyl)-4,5,6,7-(tetrafluoroisoindoline)-1,3-dione, and the diamine monomer is reacted with aromatic diamine and dianhydride to generate polyimide. By introducing fluorine atoms and strong electron withdrawing groups into the structure of diamine, the generation of charge transfer complexes (CTC) in molecules is inhibited, and the transparency of polyimide is remarkably improved; the glass-transition temperature of prepared polyimide is 300-368 DEG C, and the light transmissivity of a thin film with the thickness of 10-12 microns at 450nm is 90%-96%; the prepared transparent polyimide material has the advantages of high transparency and glass-transition temperature and good dissolubility and heat resistance and has wide application prospects in the related fields of flexible transparent substrates, panel display and the like.

Description

technical field [0001] The invention relates to the field of polyimide and its preparation, in particular to a transparent polyimide material and its preparation method. Background technique [0002] In recent years, with the development of optoelectronic technology, the demand for ultra-thin and flexible optoelectronics industry has gradually increased. Traditional transparent substrates such as glass cannot meet this demand due to inconvenient processing and transportation and their own hard and brittle characteristics. Other transparent materials such as polystyrene, polymethyl methacrylate and other polymers can meet the needs of ultra-thinning and flexibility in terms of optical, mechanical and chemical stability, but their heat resistance is weak, and they cannot meet the requirements of optoelectronic devices. The heat resistance requirements of high temperature processes such as evaporation, and transparent polyimide materials have excellent heat resistance can meet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D209/48C08G73/10
CPCC07D209/48C08G73/105
Inventor 周雨生梁云静李士东胡葆华李韶涛迟鹏利
Owner JIANGSU SUNERA TECH CO LTD
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