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Polyimide resin with self-healing function, polyimide film and preparation method, and flexible foldable display cover base film

A technology of polyimide resin and polyimide film, which is applied in the field of materials, can solve the problems of poor mechanical properties, limited self-repair times and efficiency, etc., and achieve stable process, simple operation and high light transmittance. Effect

Active Publication Date: 2022-05-31
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the self-healing materials prepared by the aforementioned known technologies have their own defects. The former has a fixed number of microcapsules, which limits the number and efficiency of self-healing. The latter is based on a supramolecular structure. bad

Method used

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  • Polyimide resin with self-healing function, polyimide film and preparation method, and flexible foldable display cover base film
  • Polyimide resin with self-healing function, polyimide film and preparation method, and flexible foldable display cover base film
  • Polyimide resin with self-healing function, polyimide film and preparation method, and flexible foldable display cover base film

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Experimental program
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Effect test

Embodiment approach

[0057] As an optional embodiment of the present invention, the diamine monomers include 2,2'-bistrifluoromethyl-4,4'-diaminobiphenyl, 1,4-bis(4-amino-2-tri Fluoromethylphenoxy)benzene, 9,9-bis(4-aminophenyl)fluorene, 2,2-bis[4-(4-aminophenoxy)phenyl]propane, 2,2-bis[ Any one or a combination of at least two of 4-(4-aminophenoxy)phenyl]hexafluoropropane or 4,4'-bis(3-aminophenoxy)diphenylsulfone.

[0058] As an optional embodiment of the present invention, the dianhydride monomer includes 4,4-hexafluoroisopropylphthalic anhydride, 1,2,3,4-cyclobutanetetracarboxylic dianhydride, 4,4 Any one or a combination of at least two of '-oxybisphthalic anhydride, biphenyltetracarboxylic dianhydride or bisphenol A diether dianhydride.

[0059] As an optional embodiment of the present invention, the dehydrating agent includes any one or a combination of at least two of acetic anhydride, propionic anhydride or butyric anhydride.

[0060] As an optional embodiment of the present invention, ...

Embodiment approach

[0093] As a preferred embodiment of the present invention, the preparation method of the polyimide film with self-healing function comprises the following steps:

[0094] Dissolving the polyimide resin in the second solvent, drying at 60-80°C for 20-40 minutes, at 120-150°C for 20-40 minutes and at 220-250°C for 40-60 minutes in a nitrogen atmosphere, to obtain Repair function polyimide film.

[0095] By further limiting the preparation method of the polyimide film, the second solvent can be completely volatilized.

[0096] According to the fifth aspect of the present invention, there is also provided a base film for a flexible and foldable display screen cover, which is made of the above-mentioned polyimide resin with self-repair function or the above-mentioned polyimide film with self-repair function .

[0097] In view of the advantages of the above-mentioned polyimide resin or polyimide film with self-healing function, the flexible foldable display cover base film that uses...

Embodiment 1

[0100] This embodiment provides a polyimide resin with self-healing function, which is mainly made of the following raw materials:

[0101] Diamine monomer, dianhydride monomer, furfurylamine, maleic anhydride, dehydrating agent and catalyst.

[0102] Among them, the diamine monomer is 2,2'-bistrifluoromethyl-4,4'-diaminobiphenyl, the dianhydride monomer is 4,4-hexafluoroisopropylphthalic anhydride, and the diamine The molar ratio of monomer and dianhydride monomer is 1:1, maleic anhydride accounts for 1% of the total molar amount of diamine monomer and dianhydride monomer, furfurylamine accounts for the total molar amount of diamine monomer and dianhydride monomer 1% of the amount, the dehydrating agent is acetic anhydride, and the catalyst is pyridine.

[0103] The preparation method of the above-mentioned polyimide resin with self-repairing function comprises the following steps:

[0104] (a) Dissolve 16.01 g (50 mmol) of 2,2'-bistrifluoromethyl-4,4'-diaminobiphenyl in 15...

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Abstract

The invention provides a polyimide resin with self-repairing function, a polyimide film, a preparation method and a flexible foldable display screen cover plate base film, and relates to the field of material technology. The polyimide resin is mainly made of raw materials such as diamine monomer, dianhydride monomer, end-capping agent, dehydrating agent and catalyst. Among them, furfurylamine and maleic anhydride are used as end-capping agents, which can be used in polyimide The structure of conjugated diene and substituted olefin is introduced into the main structure of the resin. Based on the dynamic reversible Diels-Alder reaction, the cyclohexene structure is cracked at a higher temperature to generate furfurylamine and maleic anhydride, and furfurylamine and maleic anhydride are generated during the cooling process. The amine and maleic anhydride react spontaneously to produce a cyclohexene structure, thereby realizing self-healing of the polyimide resin. The present invention also provides a polyimide film with self-repair function, which is made of the above-mentioned polyimide resin. The polyimide film has self-repair function, and the repair effect does not decrease with the increase of repetition times.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a polyimide resin with self-repairing function, a polyimide film, a preparation method and a flexible foldable display screen cover plate base film. Background technique [0002] Due to the strong interaction between molecular chains and the high rigidity of molecular chains, polyimide has excellent mechanical strength and heat resistance, and has shown broad application prospects in the fields of medical care, electronics, and aerospace. In particular, the development of colorless and transparent polyimide materials has further expanded the application of polyimide in the field of flexible displays. Although the colorless and transparent polyimide film has good strength and toughness, local damage or microcracks will inevitably occur during repeated folding, which will cause the expansion of macroscopic cracks and ultimately affect the integrity and stability of the material. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/10C08J5/18C08L79/08
CPCC08G73/1067C08G73/1039C08G73/1014C08G73/1017C08G73/1071C08G73/1064C08G73/1042C08G73/1075C08G73/1078C08J5/18C08J2379/08
Inventor 张远豪周玉波金亚东
Owner NINGBO CHANGYANG TECH
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