Processing stock solution of polyimide fiber or film, preparation method and applications thereof

A polyimide fiber, a technology for processing raw liquid, applied in the chemical characteristics of fibers, textiles and papermaking, single-component synthetic polymer rayon, etc. The process is simple, the price is low, and the equipment is universal.

Inactive Publication Date: 2014-10-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the performance of polyimide polymer materials has been further optimized after the aforementioned improvements, there are still deficiencies such as complex processes and inconvenient raw material sources in the production process of the above-mentioned technical solutions, which lead to increased production costs.

Method used

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  • Processing stock solution of polyimide fiber or film, preparation method and applications thereof
  • Processing stock solution of polyimide fiber or film, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1.1 Preparation of processing stock solution

[0026] At room temperature, add 25.8g (0.1mol) of 2,2-bis(3-amino-4-hydroxyphenyl)propane and 260ml of N-methyl-2-pyrrolidone into the reactor, stir and dissolve, then add 62.0g (0.2mol) powder of 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride, stirred at 3°C ​​for 0.6h, then added 22.4g (0.1mol) 2-(4-aminophenyl )-5-aminobenzimidazole, stirred and reacted for 3.5 hours at a temperature of 3° C. to obtain a homogeneous and viscous polyamic acid processing stock solution. Measured by BROOKFIELD's CAP2000+ vertebral plate viscometer, its viscosity at 80°C is 2436mPa.s.

[0027] 1.2 Preparation of polyimide film

[0028] Take an appropriate amount of the processing stock solution prepared in 1.1, evenly coat it on a clean flat glass sheet, and put it into a blast high-temperature oven to solidify to form a film. The specific process is: raise the temperature from room temperature to 130°C and keep it for 60 minutes; ℃...

Embodiment 2

[0032] 2.1 Preparation of processing stock solution

[0033] At room temperature, add 25.8g (0.1mol) of 2,2-bis(3-amino-4-hydroxyphenyl)propane and 260ml of N-methyl-2-pyrrolidone into the reactor, stir and dissolve, then add 62.0g (0.2mol) powder of 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride, stirred at 2°C for 0.8h, then added 22.4g (0.1mol) 2-(4-aminophenyl )-5-aminobenzimidazole, stirred and reacted for 4 hours at a temperature of 2° C. to obtain a homogeneous and viscous polyamic acid processing stock solution. Measured by BROOKFIELD's CAP2000+ laminar viscometer, its viscosity at 80°C is 2485mPa.s.

[0034] 2.2 Preparation of polyimide film

[0035]Take an appropriate amount of the processing stock solution prepared in 2.1, evenly coat it on a clean flat glass sheet, put it into a blast high-temperature oven, and solidify it into a film. ℃, keep for 60min; continue to raise the temperature to 280℃, keep for 60min, stop heating, cool down to room temperature ...

Embodiment 3

[0039] 3.1 Preparation of processing stock solution

[0040] At room temperature, add 25.8g (0.1mol) of 2,2-bis(3-amino-4-hydroxyphenyl)propane and 260ml of N-methyl-2-pyrrolidone into the reactor, stir and dissolve, then add 62.0g (0.2mol) powder of 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride, stirred at 5°C for 0.9h, then added 22.4g (0.1mol) 2-(4-aminophenyl )-5-aminobenzimidazole, stirred and reacted for 4.5 hours at a temperature of 5° C. to obtain a homogeneous and viscous polyamic acid processing stock solution. Measured by BROOKFIELD's CAP2000+ vertebral plate viscometer, its viscosity at 80°C is 2503mPa.s.

[0041] 3.2 Preparation of polyimide film

[0042] Take an appropriate amount of the processing stock solution prepared in 3.1, evenly coat it on a clean flat glass sheet, and put it into a blast high-temperature oven to solidify and form a film. The specific process is: raise the temperature from room temperature to 130°C and keep it for 60 minutes; ℃,...

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Abstract

The invention provides a processing stock solution of polyimide fiber or film, a preparation method and applications thereof. The main component of the processing stock solution is polyamide acid based on 2,2-bis(3-amino-4-hydroxylphenyl)propane, and the polyamide acid is prepared by an one-step reaction among 2,2-bis(3-amino-4hydroxylphenyl)propane, 3,3',4,4'-diphenyl ether tetracarboxylic acid dianhydride, and 2-(4-aminophenyl)-5-aminobenzimidazole in a non-protonic polar solvent. The preparation technology is simple, the operation is convenient, the method is environment-friendly, the equipment is general, the organic solvent can be recycled, and the method can be applied to industrial production. Furthermore, the raw material is easily available, the price of the raw materials is low, and thus the production cost is reduced. By strictly controlling the mole ratio and adding sequence of the raw materials, the molecular weight and molecular structure of polyamide acid can be easily controlled, and thus the processing stock solution becomes more suitable for preparation of high performance polyimide fiber or film.

Description

technical field [0001] The present invention relates to a processing stock solution for polyimide fiber or film, especially a processing stock solution based on 2,2-bis(3-amino-4-hydroxyphenyl)propane, as well as a preparation method and application of the processing stock solution , belonging to the technical field of organic polymer synthesis and application. Background technique [0002] As a high-performance engineering material, polyimide (PI) has excellent physical and chemical properties, such as good heat resistance, low temperature resistance, radiation resistance, electrical insulation, flame retardancy, high Strength, high modulus and non-toxic, it has been widely used as a variety of materials in high-tech fields such as electronics, microelectronics, aerospace, lasers, and optoelectronics. With the development and improvement of synthesis technology and spinning methods, the development of polyimide polymer materials has made rapid progress, especially in recen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10D01F6/78D01D10/02C08J5/18C08L79/08
Inventor 钱明球虞鑫海赵炯心
Owner CHINA PETROLEUM & CHEM CORP
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