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Black matte polyimide thin film and preparation method thereof

A matte polyimide and film preparation technology, applied in the field of black matt polyimide film and its preparation, can solve the problems of low gloss, low light transmittance and high process requirements, and achieve low light transmittance and gloss, increase mechanical properties, excellent mechanical properties

Inactive Publication Date: 2016-03-09
GUILIN ELECTRICAL EQUIP SCI RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main production technologies for black matt PI films are divided into two categories: one is to add black pigments and matting agent fillers to PI resin, and then undergo chemical imidization or thermal imidization to synthesize a film with low light transmittance. High-efficiency and low-gloss PI film, this method is easy to operate, and the effect is obvious, but due to the addition of a large number of fillers, the mechanical properties of the PI film are greatly reduced; one type is on one or both sides of the PI base film Apply a layer of PI film with black pigment and matting effect
This method can better retain the excellent mechanical properties of the PI film, but the film-forming equipment is complicated, the process requirements are high, and it is difficult to popularize

Method used

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  • Black matte polyimide thin film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Preparation of black slurry: Weigh 1000g of N,N-dimethylacetamide solvent, add 20g of γ-aminopropyltriethoxysilane, stir for 15min, add 150g of carbon black, ultrasonically pre-disperse for 30min, Homogenize for 30 minutes by a high-pressure homogenizer to obtain a stable black slurry;

[0026] 2) Preparation of inorganic filler dispersion: Add 40g of silicon dioxide (10um) and 5g of talc powder (5um) into 1000g of N,N-dimethylacetamide solvent, shear and disperse for 1h, and ultrasonically disperse for 2h to obtain a stable Inorganic filler dispersion;

[0027] 3) Preparation of black matt polyimide film:

[0028] At room temperature, weigh 1000g of N,N-dimethylacetamide solvent, add 119.65g of 4,4'-diaminodiphenyl ether, dissolve and add pyromellitic dianhydride in the same molar ratio, and stir After reacting for 4 hours, add 40 g of black slurry and 500 g of inorganic filler dispersion, mix and stir for 8 hours, and form a film through defoaming, casting, biaxi...

Embodiment 2

[0030] 1) Preparation of black slurry: Weigh 1000g of N,N-dimethylacetamide solvent, add 0.5g of sodium dodecylbenzenesulfonate, stir for 15min, add 20g of carbon black, pre-disperse by ultrasonic for 30min, and then Homogenize for 15 minutes by a high-pressure homogenizer to obtain a stable black slurry;

[0031] 2) Preparation of inorganic filler dispersion: Add 150g of titanium dioxide (6um) and 80g of talc powder (0.1um) into 1000g of N,N-dimethylacetamide solvent, shear and disperse for 3 hours, and ultrasonically disperse for 2 hours to obtain a stable inorganic filler filler dispersion;

[0032] 3) Preparation of black matt polyimide film:

[0033] At room temperature, weigh 1000g of N,N-dimethylacetamide solvent, add 101.24g of 3,4'-diaminodiphenyl ether, dissolve and add 3,3',4,4 '-Biphenyltetraacid dianhydride, after stirring and reacting for 4 hours, add 400g of black slurry and 50g of inorganic filler dispersion, mix and stir for 8 hours, and form a film through ...

Embodiment 3

[0035] 1) Preparation of black slurry: Weigh 900g of N,N-dimethylacetamide solvent, add 20g of γ-aminopropyltriethoxysilane, stir for 15min, add 100g of carbon black, ultrasonically pre-disperse for 30min, Homogenize for 15 minutes by a high-pressure homogenizer to obtain a stable black slurry;

[0036] 2) Preparation of inorganic filler dispersion: Add 100g of silicon dioxide (2um) and 20g of talc powder (1um) into 1000g of N,N-dimethylacetamide solvent, shear and disperse for 3 hours, and ultrasonically disperse for 2 hours to obtain a stable Inorganic filler dispersion;

[0037] 3) Preparation of black matt polyimide film:

[0038] At room temperature, weigh 1000g of N,N-dimethylacetamide solvent, add 119.65g of 4,4'-diaminodiphenyl ether, dissolve and add pyromellitic dianhydride with equal substance ratio, stir After reacting for 4 hours, add 150 g of black slurry and 150 g of inorganic filler dispersion, mix and stir for 8 hours, and then form a film through defoaming,...

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Abstract

The invention discloses a black matte polyimide thin film and a preparation method thereof. The preparation method comprises the following steps that 1, black slurry is prepared, wherein a silane coupling agent is added to dimethylacetamide to be stirred to be uniform, black pigment is added, and the black slurry is obtained after high-pressure homogenization treatment is conducted; 2, inorganic filler dispersion liquid is prepared, wherein a matting agent and talcum powder are added to organic solvent and stirred to be uniform, and shear dispersion and ultrasonic dispersion treatment is conducted; 3, the black matte polyimide thin film is prepared, wherein diamine is dissolved in an organic solution, tetracarboxylic acid dianhydride with isoequivalent weight is added, PAA resin is obtained after a reaction is conducted, the PAA resin, the black slurry prepared in the first step and the inorganic filler dispersion liquid prepared in the second step are taken, mixed, stirred and defoamed, and the black matte polyimide thin film is obtained through two-way stretching and high-temperature imidization. The black matte polyimide thin film is low in light transmittance and lustrousness and excellent in mechanical property.

Description

technical field [0001] The invention relates to polyimide film materials, in particular to a black matte polyimide film and a preparation method thereof. Background technique [0002] Black matte polyimide film (polyimide, referred to as PI) is a high-insulation, high-strength insulating film. Compared with ordinary PI films, black PI films are opaque, have low light transmittance and reflectance, and have Good light-shielding, thermal conductivity, etc., widely used in mobile devices, computers, automobiles, and military electronic equipment. [0003] At present, the main production technologies for black matt PI films are divided into two categories: one is to add black pigments and matting agent fillers to PI resin, and then undergo chemical imidization or thermal imidization to synthesize a film with low light transmittance. High-efficiency and low-gloss PI film, this method is easy to operate, and the effect is obvious, but due to the addition of a large number of fill...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08K9/06C08K3/34C08K3/36C08K3/04C08K3/22C08G73/10C08J5/18
CPCC08K9/06C08G73/1007C08J5/18C08J2379/08C08K3/04C08K3/22C08K3/34C08K3/36C08K2003/2241C08K2201/003C08L2203/16C08L79/08
Inventor 韩艳霞任小龙蒋耿杰
Owner GUILIN ELECTRICAL EQUIP SCI RES INST
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