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Display device, polyimide precursor composition, polyimide film, and laminate

A polyimide precursor and polyimide film technology, which is applied in the directions of instruments, optics, identification devices, etc., can solve the problems of increasing the thermal expansion coefficient of the polyimide film, reducing the heat resistance, and increasing the production cost. , to achieve the effects of excellent mechanical properties, improved transmittance and low haze

Active Publication Date: 2021-07-02
武汉柔显科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the introduction of too many fluorine-containing groups or fluorine atoms will increase the thermal expansion coefficient of the polyimide film, and will also greatly increase the preparation cost.
In addition, the light transmittance of polyimide film can be greatly improved by introducing aliphatic rings, but its heat resistance will be greatly reduced

Method used

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  • Display device, polyimide precursor composition, polyimide film, and laminate
  • Display device, polyimide precursor composition, polyimide film, and laminate
  • Display device, polyimide precursor composition, polyimide film, and laminate

Examples

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preparation example Construction

[0036] The synthesis of the polymer B in the present invention includes the steps of reacting one or more diazoacetate monomers under the action of a transition metal-containing catalyst at 20-80°C, and then reprecipitating. Further, the synthesis method of the polymer B in the present invention comprises the steps of: dispersing the transition metal-containing catalyst in the solvent F, and then dropping the diazoacetate monomer into the solvent F, and reacting for 24 hours, the obtained The product was reprecipitated in solvent G to obtain polymer B powder.

[0037] In the present invention, the chemical formula of the polymerization of diazoacetate monomers to generate polymer B is shown in the following formula (3):

[0038] Formula (3)

[0039] R in formula (3)1 for hydrogen.

[0040] The monomer used for synthesizing polymer B in the present invention is diazoacetate monomer, can enumerate example: diazoacetate methyl ester, diazoacetate ethyl ester, diazoacetate ter...

Synthetic example 1

[0097] Under dry nitrogen flow, 1.00 g of copper dichloride catalyst was added to 100 mL of chloroform and kept stirring, the reaction temperature was raised to 60 ° C, and then 100.00 g of EDA was added dropwise to the reaction system, and the reaction After 24 hours, after the reaction, filter out the catalyst, use the mixture of diethyl ether and cyclohexane (1:1) as a precipitant to obtain a white flocculent precipitate, and further vacuum dry the precipitate to obtain polymer B1, the weight average molecular weight for 5087. The reaction equation is shown in the following formula (5).

[0098] Formula (5)

Synthetic example 2

[0100] Only by adjusting the amount of EDA added in Synthesis Example 1 to 150 g, polymer B2 can be obtained with a weight average molecular weight of 8526.

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Abstract

The invention discloses a display device, a polyimide precursor composition, a polyimide film and a laminate, and relates to the technical field of photoelectricity. The display device includes a substrate and a display unit; the substrate comprises a polyimide film formed by a polyimide precursor composition comprising a polyamic acid and a polymer, the polymer comprises a repeating unit represented by a formula (1) defined in the specification: in the formula (1), n is an integer of 2-200, R1 represents a hydrogen atom or a monovalent organic group, and R2 represents any one or more monovalent organic groups. By introducing a diazoacetate polymer, the transmittance of the polyimide film is improved, the glass transition temperature of the polyimide film is increased, the mechanical property of the polyimide film is improved, and the polyimide film with low haze and low CTE is obtained.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a display device, a polyimide precursor composition, a polyimide film and a laminated body. Background technique [0002] With the rapid development of display technology, electronic terminals have higher and higher requirements for display screens. For example, the requirement to place a front-facing camera under a flexible display has attracted a lot of attention. Amine materials put forward higher requirements, which means that polyimide film materials need to have higher light transmittance under the premise of excellent heat resistance and other superior properties. [0003] Generally speaking, polyimide films prepared by aromatic diamines and aromatic dibasic anhydrides have excellent heat resistance, but the formation of intramolecular conjugation and charge transfer complexes makes such films The polyimide film exhibited a distinct tan color. Therefore, in order...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08L65/00C08J5/18G02F1/1333G09F9/30
CPCC08J5/18C08J2379/08C08J2465/00G02F1/133305G09F9/301
Inventor 陈诚肖桂林颜枫鲁丽平张萍朱双全
Owner 武汉柔显科技股份有限公司
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