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Preparation method of black matte polyimide film

A technology of polyimide film and black matte, which is applied in the field of film materials, can solve the problems such as the reduction of mechanical properties of polyimide film, and achieve the effect of good mechanical properties and high product quality

Active Publication Date: 2021-06-08
WUXI SHUNXUAN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for preparing a black matte polyimide film to solve the problem in the prior art that the mechanical properties of the polyimide film added with black filler and matting powder are reduced

Method used

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  • Preparation method of black matte polyimide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of black matte polyimide film is as follows:

[0026] (1) Preparation of emulsion

[0027] Carbon black and silicon dioxide (5 μm) are added in the ultrasonic dispersion kettle, carbon black accounts for 4% of polyimide matrix quality, and silicon dioxide (5 μm) accounts for 6% of polyimide matrix quality, adds N- Stir the methylpyrrolidone (NMP) solvent, the stirring speed is 1000r / min, and carry out ultrasonic dispersion treatment, the ultrasonic frequency is 20kHz, the power is 2000W, and the processing time is 60min to obtain a black emulsion;

[0028] (2) Preparation of amine solution

[0029] Add 4,4'-diaminodiphenyl ether into the reaction kettle, add dimethylformamide solvent to dissolve, and stir at 80r / min until the crystals of 4,4'-diaminodiphenyl ether are completely dissolved in the solvent , to obtain amine solution;

[0030] (3) emulsification

[0031] Add the dispersed black emulsion into the dissolved amine liquid, and add pol...

Embodiment 2

[0037] The preparation method of black matte polyimide film is as follows:

[0038] (1) Preparation of emulsion

[0039] Carbon black and silicon dioxide (5 μm) are added in the ultrasonic dispersion kettle, carbon black accounts for 6% of polyimide matrix quality, and silicon dioxide (5 μm) accounts for 6% of polyimide matrix quality, adds N- Stir the methylpyrrolidone (NMP) solvent, the stirring speed is 1000r / min, and carry out ultrasonic dispersion treatment, the ultrasonic frequency is 20kHz, the power is 2000W, and the processing time is 60min to obtain a black emulsion;

[0040] (2) Preparation of amine solution

[0041] Add 4,4'-diaminodiphenyl ether into the reaction kettle, add dimethylacetamide solvent to dissolve, and stir at 80r / min until the crystals of 4,4'-diaminodiphenyl ether are completely dissolved in the solvent , to obtain amine solution;

[0042] (3) emulsification

[0043] Add the dispersed black emulsion into the dissolved amine liquid, and add pol...

Embodiment 3

[0049] The preparation method of black matte polyimide film is as follows:

[0050] (1) Preparation of emulsion

[0051] Carbon black and silicon dioxide (5 μm) are added in the ultrasonic dispersion kettle, carbon black accounts for 6% of polyimide matrix quality, and silicon dioxide (5 μm) accounts for 6% of polyimide matrix quality, adds N- Stir the methylpyrrolidone (NMP) solvent, the stirring speed is 1000r / min, and carry out ultrasonic dispersion treatment, the ultrasonic frequency is 20kHz, the power is 2000W, and the processing time is 60min to obtain a black emulsion;

[0052] (2) Preparation of amine solution

[0053] Add 4,4'-diaminodiphenyl ether into the reaction kettle, add dimethylacetamide solvent to dissolve, and stir at 80r / min until the crystals of 4,4'-diaminodiphenyl ether are completely dissolved in the solvent , to obtain amine solution;

[0054] (3) emulsification

[0055] Add the dispersed black emulsion into the dissolved amine liquid, and add pol...

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Abstract

The invention provides a preparation method of a black matte polyimide film, which comprises the following steps: (1) preparation of an emulsion: adding a black filler and matting powder into an ultrasonic dispersion kettle, adding a solvent, stirring, and carrying out ultrasonic dispersion treatment; (2) preparation of amine liquid: adding an aromatic diamine monomer into a reaction kettle, adding a solvent for dissolving, and stirring; (3) emulsifying: adding the dispersed black emulsion into the dissolved amine liquid, adding an auxiliary agent, and dispersing by a high-speed emulsifying pump; (4) preparation of polyamide acid: adding an aromatic dianhydride monomer with the molar weight equal to that of the aromatic diamine monomer in the step (2) into the reaction kettle in batches for reaction, and stirring; and (5) salivation forming. According to the invention, the problem that the mechanical property of the polyimide film added with the black filler and the matting powder is reduced in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of film materials, in particular to a method for preparing a black matte polyimide film. Background technique [0002] At present, the integration of microelectronics and battery control is getting higher and higher. Black matte polyimide film has become one of the mainstream electronic device cover film materials because of its black color, low light transmittance, and surface extinction. General-purpose polyimide has a golden yellow or brown color due to its highly conjugated structure. In the past, black matte polyimide films were generally prepared by painting black glue on the surface of ordinary yellow polyimide films. The cost of the method is low, and the application field is very common. In the environment with strict requirements, the black glue will fall off. The imide is matte black, and the temperature resistance and other properties of the black matte polyimide film produced are improved, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L79/08C08K3/04C08K3/36C08K3/22C08K3/34C08G73/10
CPCC08J5/18C08G73/1071C08G73/1067C08J2379/08C08K2201/003C08K3/04C08K3/36C08K3/00C08K3/34Y02E60/10
Inventor 刘宸宇王科贝润鑫刘顺祯
Owner WUXI SHUNXUAN NEW MATERIALS
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