Process for preparing perfluorosulfonyl resin

A technology of perfluorosulfonyl vinyl ether and perfluoroalkane, which is applied in the field of preparing perfluorosulfonyl resins, can solve problems affecting conversion rate, difficulty in handling, cost impact, etc., so as to improve conversion rate and yield and improve reliability regulatory effect

Inactive Publication Date: 2003-03-12
SHANGHAI 3F NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] According to U.S. Patent No. 5,281,680, due to the use of a solvent system with a lower boiling point, the volatility of the solvent affects the conversion rate and product yield of PSVE monomer, thereby having a greater impact on the cost; on the other hand, due to the polymerization system , the increase of tetrafluoroethylene pressure and the prolongation of polymerization time will have obvious adverse effects on the equivalent weight (EW) value of the product and the stirring during the polymerization process, and most of the obtained products are in the form of large pieces of lumps, which are difficult to handle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Add 600g perfluorosulfonyl vinyl ether (PSVE) (commercial grade) and 0.06g isopropyl peroxydicarbonate (50% CFC-113 solution) into a 2L stainless steel reactor at room temperature, then add 1000g C 7 f 16 / C 8 f 16 o 2 mixture as a solvent (wherein C 8 f 16 o 2 for 300g). Replace with nitrogen and then replace with TFE, then pass through TFE to pressurize, raise the temperature to 70°C, adjust the pressure to keep the pressure of TFE at 1200kPa, react for 2 hours, cool down, and discharge the material. 10 kg of chloroform was added with stirring, and the precipitated white product was centrifuged, washed with water, and dried in a vacuum environment at 100° C. to obtain a translucent powder. The solution after centrifugation is subjected to fractional distillation to recover chloroform, polymerization solvent and unreacted monomer.

Embodiment 2

[0049] The process described in Example 1 was repeated, except that disuccinic acid peroxide was used as the initiator. As a result, the F content of the product obtained was 68.7%, the EW value was 888g / mol, the melting temperature was 201°C, and the thermal decomposition temperature was 360°C. ℃.

Embodiment 3-5

[0051] The process described in Example 1 was repeated, except that the polymerization time was respectively 3 hours, 5 hours, and 8 hours. The analytical test results of Examples 1 and 3 to 5 are listed in Table 1.

[0052]

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Abstract

A process for preparing perfluorosulfonyl resin includes copolymerization of perfluorosulfonyl vinylether with tetrafluoroethene in the presence of perfluoroalkane/perfluorocycloether mixture and initiator, and adding haloalkane for precipitation or adding deionized water for distilling. Its advantages are high content (more than 20%), and low equivalent weight.

Description

technical field [0001] The present invention relates to a method for the preparation of perfluorosulfonyl resins for fuel cells and the chlor-alkali industry, more particularly, the present invention relates to a method for preparing perfluorosulfonyl resins using specific dispersants / solvents and specific post-processing steps Acyl resin method, so that the obtained perfluorosulfonyl resin has a satisfactory product content and equivalent weight, and the obtained product is in the form of a powder that is easy to handle. Background technique [0002] Since DuPont of the United States successfully developed perfluorosulfonic acid proton exchange resin and membrane, perfluorosulfonic acid proton exchange membrane has been widely used in the chlor-alkali industry due to its superior comprehensive performance. In recent years, energy and environmental issues have been paid great attention by countries all over the world, and the research and development of fuel cells has become...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/18C08F214/26
Inventor 杨兵江建安王文瀚侯结民桑佩培
Owner SHANGHAI 3F NEW MATERIAL TECH CO LTD
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