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Preparation method of high-transparency high-temperature-resistant fluorine-containing polyimide resin

A fluorine-containing polyimide and high temperature resistant technology, applied in the field of preparation of highly transparent and high temperature resistant fluorine-containing polyimide resin, can solve problems such as application limitation and high cost of 6FDA, and achieve improved mechanical properties and excellent optical properties. , good solubility

Inactive Publication Date: 2017-03-15
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Description
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  • Application Information

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Problems solved by technology

[0004] Although the polyimide synthesized by 6FDA has outstanding performance and many potential application values, the application of this kind of polymer is greatly restricted due to the high cost of 6FDA.

Method used

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  • Preparation method of high-transparency high-temperature-resistant fluorine-containing polyimide resin
  • Preparation method of high-transparency high-temperature-resistant fluorine-containing polyimide resin
  • Preparation method of high-transparency high-temperature-resistant fluorine-containing polyimide resin

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Embodiment

[0026] A 3'-(trifluoromethyl)-[1,1'-biphenyl]-2,5-diol and 3'-methyl-[1,1'-biphenyl]-2, 5-diol prepares the method for highly transparent and high-temperature-resistant polyimide through a series of chemical reactions, and its preparation steps are as follows:

[0027] (1) Add 3'-(trifluoromethyl)-[1,1'-biphenyl]-2,5-diol (dry) (3'-methyl-[1 , 1'-diphenyl]-2,5-diol) and 2-chloro-5-nitro-trifluorotoluene, and adding solvent DMF and water-carrying drug toluene (80mL), using potassium carbonate as a catalyst at 135 React at -140°C for 4 hours, then increase the temperature to 150°C for 4 hours. During the reaction process, nitrogen gas was continuously fed and stirred. Discharging in a mixture of ice and water, washing the obtained powder with water until the solution is colorless, washing with methanol for 2-3 times, and drying in a vacuum oven.

[0028] (2) put the first reaction product 2,5-bis(4-nitro-2-(trifluoromethyl)phenoxy)-3-(trifluoromethyl)-1,1'-biphenyl Into the ...

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Abstract

The invention relates to a preparation method of polyimide resin, and in particular to a preparation method of high-transparency high-temperature-resistant fluorine-containing polyimide resin. According to the prepared hyperbranched fluoro polyimide materials, introduction of a linear part can increase chain entanglement of a polymer, besides, introduction of a side chain part can increase the solubility of the polymer and further reduce the double refraction value of the polymer, and a rib type waveguide strip is obtained with the crosslinking type hyperbranched polymer by ion etching. By means of the two-step chemical chain buckling method, a series of fluorine-containing hyperbranched polyimide materials with different linear lengths are successfully synthesized. The prepared hyperbranched polyimide has good thermostability and good solubility in an organic solvent. The mechanical property, thermal property and optical property of the materials have good linear colligative relationship with the content of triamine monomers in the materials. The rib type waveguide strip is successfully prepared and has good optical properties, and the mechanical properties of the rib type waveguide strip are improved.

Description

technical field [0001] The invention relates to a preparation method of a highly transparent and high temperature resistant fluorine-containing polyimide resin, in particular to a preparation method of a highly transparent and high temperature resistant fluorine-containing polyimide resin. Background technique [0002] Trifluoromethyl-containing polyimide was reported as early as 1967, and it is also the most studied polymer among fluorine-containing polyimides. The most common dianhydride used in fluorine-containing polyimide is 6FDA, which is synthesized by the reaction of o-xylene and hexafluoroacetone according to the formula Figure 1.10. [0003] . [0004] Although the polyimide synthesized by 6FDA has outstanding performance and many potential application values, the application of this kind of polymer is greatly restricted due to the high cost of 6FDA. Shown is its polymer synthesized with APB as image 3 shown. [0005] Belonging to this category of dianhydride...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10
CPCC08G73/1003C08G73/1039C08G73/1046C08G73/1075
Inventor 刘禹王浩杰翁秀燕余征宏
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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