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Polyimide film for flexible AMOLED

A polyimide film, flexible technology, applied in the field of polyimide film, to achieve the effect of improving toughness, increasing use strength, and improving heat resistance

Pending Publication Date: 2022-03-11
NANJING ZHONGHONG RUNNING ADVANCED MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a polyimide film for flexible AMOLED, which has the advantages of good corrosion resistance and toughness, and solves the problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] Its preparation method comprises the following steps:

[0032] A. First, take out biphenyltetracarboxylic dianhydride, diaminobiphenyl and diamine according to the ratio and pour them into a container for mixing;

[0033] A1, when tetracarboxylic dianhydride, diaminobiphenyl and diamine, carry out under low temperature environment, then obtain polymer, filter the impurity in polymer by filter screen;

[0034] A2, heat-treating the polymer obtained in step A1 to cause a chemical reaction;

[0035] B. First, pour maleic anhydride, phenylacetylene phthalic anhydride, tetrahydrophthalic anhydride and ethynylaniline into the container in proportion, and stir the mixture;

[0036] B1, leave the stirred mixture to allow it to react;

[0037] B2, heating the mixture after standing, finally obtaining the end-capping agent;

[0038] C. Pour acetic anhydride, trifluoroacetic anhydride and acetyl chloride into the measuring cup, then stir the mixture in the measuring cup. After ...

Embodiment 2

[0048] In embodiment one, add following operation:

[0049] Polyimide film consists of 2 parts of biphenyltetracarboxylic dianhydride, 3 parts of diaminobiphenyl, 1.5 parts of diamine, 3 parts of maleic anhydride, 3 parts of phenylacetylene phthalic anhydride, 2 parts of tetrahydrophthalic anhydride, ethynylaniline 4 parts, 3 parts of acetic anhydride, 1 part of trifluoroacetic anhydride, 2 parts of acetyl chloride, 5-7 parts of triethylamine, 4 parts of pyridine, 1 part of isoquinoline, 6 parts of silicon dioxide, 4 parts of indium tin oxide, 2 parts of titanium dioxide.

[0050]Its preparation method comprises the following steps:

[0051] A. First, take out biphenyltetracarboxylic dianhydride, diaminobiphenyl and diamine according to the ratio and pour them into a container for mixing;

[0052] A1, when tetracarboxylic dianhydride, diaminobiphenyl and diamine, carry out under low temperature environment, then obtain polymer, filter the impurity in polymer by filter screen...

Embodiment 3

[0067] In embodiment two, add following operation:

[0068] Polyimide film consists of 5 parts of biphenyltetracarboxylic dianhydride, 6 parts of diaminobiphenyl, 3.5 parts of diamine, 5 parts of maleic anhydride, 5 parts of phenylacetylene phthalic anhydride, 4 parts of tetrahydrophthalic anhydride, ethynylaniline 5 parts, 6 parts of acetic anhydride, 3 parts of trifluoroacetic anhydride, 5 parts of acetyl chloride, 7 parts of triethylamine, 5 parts of pyridine, 3 parts of isoquinoline, 8 parts of silicon dioxide, 6 parts of indium tin oxide, 6 parts of titanium dioxide share.

[0069] Its preparation method comprises the following steps:

[0070] A. First, take out biphenyltetracarboxylic dianhydride, diaminobiphenyl and diamine according to the ratio and pour them into a container for mixing;

[0071] A1, when tetracarboxylic dianhydride, diaminobiphenyl and diamine, carry out under low temperature environment, then obtain polymer, filter the impurity in polymer by filter...

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PUM

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Abstract

The invention discloses a polyimide film for a flexible AMOLED (Active Matrix / Organic Light Emitting Diode), which comprises the following components: biphenyl tetracarboxylic dianhydride, diaminodiphenyl, diamine, maleic anhydride, phenylacetylene phthalic anhydride, tetrahydrophthalic anhydride, acetenyl aniline, acetic anhydride, trifluoroacetic anhydride, acetyl chloride, triethylamine, pyridine, isoquinoline, silicon dioxide, indium tin oxide and titanium dioxide. The biphenyl tetracarboxylic dianhydride, diaminobiphenyl and diamine are used for enhancing the corrosion resistance of the polyimide film, and the situation that the service life of the polyimide film is shortened due to the fact that the polyimide film is affected by harmful substances in air in long-term use is avoided, so that the use strength of the polyimide film is improved, and the service life of the polyimide film is prolonged. Through maleic anhydride, phenylacetylene phthalic anhydride, tetrahydrophthalic anhydride and acetenyl aniline, in the presence of appropriate functional groups, the molecular chain end of the polymer still can participate in the reaction to grow the chain, and in order to eliminate the activity of the end group, a monofunctional group compound can be added to disappear the functional group of the end group.

Description

technical field [0001] The invention relates to the technical field of polyimide films, in particular to a polyimide film used for flexible AMOLEDs. Background technique [0002] Polyimide is a kind of polymer with highly regular chemical structure containing imide rings on the main chain of the polymer. Its special imide ring structure makes it have excellent mechanical, thermal properties, dielectric properties, mechanics, and radiation resistance. As well as solvent resistance and other properties, it is widely used in aviation, aerospace, microelectronics, automobile industry and other fields. With the rapid development of electronic products towards thinner and miniaturized, when used as a base film on a flexible circuit board, the mechanical properties of the film , The requirements for dimensional stability are getting higher and higher. When the existing polyimide film is used in the external environment, it will be damaged by the corrosion of harmful substances in t...

Claims

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Application Information

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IPC IPC(8): C08G73/10C08L79/08C08K3/36C08K3/22C08J5/18
CPCC08G73/1067C08G73/1007C08G73/1028C08J5/18C08J2379/08C08K3/36C08K2003/2241C08K3/22
Inventor 徐勇汤学妹陈坚李林霜
Owner NANJING ZHONGHONG RUNNING ADVANCED MATERIAL TECH CO LTD
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