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Black polyimide film and its preparation method and application

A technology of black polyimide and film, which is applied in the field of polyimide, can solve the problems of general light-shielding property and poor mechanical properties of black polyimide film, and achieve good mechanical properties, optical properties and good electrical properties Effect

Active Publication Date: 2022-03-29
CHANGZHOU SUNCHEM HIGH FORMANCE POLYMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the light-shielding properties are average, especially the black polyimide film with this structure has poor mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0022] The preparation method of the black polyimide film of the present embodiment has the following steps:

[0023] ①In a 5L three-necked round-bottom flask equipped with a mechanical stirrer, a thermometer and a nitrogen protection device, add 290.37g of 1,4'-bis(4-aminoanilino)benzene [1.0mol] and 2L of N-formazol base pyrrolidone and stirred to form a homogeneous solution.

[0024] ②Add 218.12g of pyromellitic dianhydride [1.0mol] in batches to the homogeneous solution obtained in step ①, react at room temperature (15-25°C, the same below) for 24h after the addition, and then use 100mL of N- Rinse the residual material with methylpyrrolidone, and then filter it with a 1.0 μm micropore filter to obtain a polyamic acid solution with a solid content of 20%.

[0025] ③ Coat the polyamic acid solution obtained in step ② onto the glass surface, and bake in a blast oven (50°C / 30 minutes, 80°C / 1 hour, 150°C / 1 hour, 200°C / 1 hour, 300°C °C / 1 hour), peeled off to obtain a black po...

Embodiment 2～ Embodiment 5）

[0033] The preparation method of the black polyimide film of each embodiment is basically the same as that of Example 1, except that the diamine monomer and the dianhydride monomer are different, see Table 1 for details.

[0034] The relevant properties of the black polyimide film prepared in each embodiment were tested, and the results are still shown in Table 2.

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PUM

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Abstract

The invention discloses a black polyimide film and its preparation method and application. The black polyimide film is composed of 1,4'-bis(4-aminoanilino)benzene and / or 1,3'- Bis(4-aminoanilino)benzene as a diamine monomer with 3,3',4,4'-benzophenone tetracarboxylic dianhydride, 3,3',4,4'-diphenyl ether tetracarboxylic dicarboxylic acid Anhydride, 3,3',4,4'-biphenyltetracarboxylic dianhydride, pyromellitic dianhydride and other dianhydride monomers. The black polyimide film of the present invention not only has good electrical properties, but also has good mechanical properties and optical properties, so that it can be used more widely in the fields of microelectronics, optoelectronics, wearable devices, lithium batteries, etc. , especially can be used in wireless charging antenna insulation protection film, FPC cover film, lithium battery connector cover film, black high temperature resistant label, black polyimide base film for tape, solar energy absorption and energy storage film.

Description

technical field [0001] The invention belongs to the technical field of polyimide, and in particular relates to a black polyimide film and its preparation method and application. Background technique [0002] Due to the increasing integration of microelectronics, photoelectric display devices, and battery control, the performance requirements for black polyimide protective films are getting higher and higher. However, due to the high conjugated structure of general-purpose polyimide, it has a strong absorption in the visible light region and is golden yellow. So far, many reports on the preparation of black polyimide films are generally dispersed in ordinary polyamic acid solutions. Carbon black particles, carbon nanotubes, black metal oxides, and black organic dyes are prepared by thermal imidization. Although these methods can effectively improve the shading properties, due to the large van der Waals force and surface energy in carbon black particles, carbon nanotubes, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/10C08J5/18C08L79/08
Inventor 胡国宜胡锦平吴建华袁向文
Owner CHANGZHOU SUNCHEM HIGH FORMANCE POLYMER