High-strength polyimide, preparation method and production equipment

A technology of polyimide and polyimide acid, which is applied in the preparation method and production equipment, can solve the problem that the strength of polyimide cannot meet the demand, and achieve the effect of optimal strength and enhanced strength

Pending Publication Date: 2022-06-24
苏州合尔达电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing polyimide streng

Method used

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  • High-strength polyimide, preparation method and production equipment

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preparation example Construction

[0024] A method for preparing high-strength polyimide in this embodiment includes the following steps:

[0025] (1) Prepare an organic solvent, in which transparent filaments are dispersedly mixed;

[0026] (2) adding pyromellitic dianhydride and m-toluidine into the organic solvent, and polymerizing the pyromellitic dianhydride and m-toluidine;

[0027] (3) Adding biphenyl tetracarboxylic dianhydride, oxydiphthalic anhydride or benzophenone tetracarboxylic dianhydride to the organic solvent, biphenyl tetracarboxylic dianhydride, oxydiphthalic anhydride or Polymerization of benzophenone tetracarboxylic dianhydride and m-toluidine;

[0028] (4) The polyimide acid generated in the organic solvent is imidized.

[0029] The present invention is further provided as follows: the steps 1-4 are carried out in a nitrogen atmosphere.

[0030] The present invention is further provided as follows: before the imidization of the polyimide acid generated in the organic solvent, the step o...

Embodiment 1

[0040] Start the magnetic stirrer 9, open the solenoid valve 3, and purge the tank 1. Then, 0.1 kg of glass fiber filaments and 1 mol of organic solvent N,N-dimethylformamide were added through the feeding port 7, the heating mantle 8 was turned on, and the temperature in the tank 1 was maintained at 30°C. After that, 1 mol of pyromellitic dianhydride and 2 mol of m-toluidine were added.

[0041] After that, add 1 mol of biphenyl tetracarboxylic dianhydride, oxydiphthalic anhydride or benzophenone tetracarboxylic dianhydride, biphenyl tetracarboxylic dianhydride, oxydiphthalic anhydride or Polymerization of benzophenone tetracarboxylic dianhydride and m-toluidine.

[0042] Since a large amount of nitrogen gas will be mixed in during the feeding and stirring of the magnetic sensor to form bubbles, if the bubbles are not discharged, a loose bubble structure will be formed in the final polyimide product. In order to improve the strength, the bubbles must be discharged. In the p...

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Abstract

The invention discloses a preparation method of high-strength polyimide, which comprises the following steps: (1) preparing an organic solvent, and mixing transparent fibers in the organic solvent in a dispersed manner; (2) adding pyromellitic dianhydride and m-toluidine into an organic solvent, and polymerizing the pyromellitic dianhydride and the m-toluidine; (3) adding the biphenyl tetracarboxylic dianhydride, the oxydiphthalic anhydride or the benzophenone tetracarboxylic dianhydride into the organic solvent, and polymerizing the biphenyl tetracarboxylic dianhydride, the oxydiphthalic anhydride or the benzophenone tetracarboxylic dianhydride and the m-toluidine; and (4) carrying out imidization on the polyimide acid generated in the organic solvent. The invention also provides high-strength polyimide and production equipment. According to the present invention, the dispersed transparent fiber yarn is added in the organic solvent in advance, the transparent fiber yarn and the polyimide are subjected to composite molding after the polyimide is subjected to tape casting, and the transparent fiber yarn has the high strength, such that the prepared polyimide has the good strength;

Description

technical field [0001] The invention relates to a high-strength polyimide, a preparation method and production equipment, and belongs to the field of high molecular polymers. Background technique [0002] Polyimide refers to a class of polymers containing imide rings (-CO-N-CO-) on the main chain, and is one of the organic polymer materials with the best comprehensive properties. Its high temperature resistance is above 400 °C, the long-term use temperature range is -200 ~ 300 °C, some parts have no obvious melting point, and it has high insulation performance. Because of its good heat resistance, chemical resistance, electrical insulation, chemical resistance and weather resistance, it is widely used in the electronics industry. [0003] In some fields, polyimides with higher strength are required. Existing polyimide strength cannot meet the demand. SUMMARY OF THE INVENTION [0004] In order to overcome the above shortcomings, the purpose of the present invention is to...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08K7/14C08G73/10B01J19/18
CPCC08K7/14C08G73/1028B01J19/18C08L79/08
Inventor 魏云武张贝
Owner 苏州合尔达电子科技有限公司
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