Preparation method of high-performance suspension PTFE

A PTFE, high-performance technology, applied in the field of preparation of high-performance suspended PTFE, can solve the problems affecting the performance of PTFE, low PTFE yield, prone to side reactions, etc., to achieve less side reactions, high yield, and improved mechanical properties Effect

Inactive Publication Date: 2016-02-10
ZHEJIANG JUSHENG FLUOROCHEM +1
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Problems solved by technology

[0003] In the existing reaction operation of the full formula of suspended PTFE, the reaction system is a redox system. The redox system is not only complicated to operate, time-consuming and labor-intensive, but also the yield of PTFE is generally not high, and side reactions are prone to occur in the reaction
There are also certain problems in the selection of reaction temperature and additives, which affect the performance of PTFE in various aspects, such as high temperature resistance, corrosion resistance and mechanical properties, etc.

Method used

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  • Preparation method of high-performance suspension PTFE
  • Preparation method of high-performance suspension PTFE

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Embodiment Construction

[0026] The invention provides a kind of preparation method of high-performance suspension PTFE, specifically comprises the following steps:

[0027] (1) Leak checking of the polymerization kettle: first empty the polymerization kettle, close all valves of the polymerization kettle, open the nitrogen manual valve of the polymerization kettle, pressurize the polymerization kettle to 1600kPa, check whether the polymerization kettle is leaking, and pass through the polymerization kettle. Then proceed to the next process; if the polymerization kettle is found to be leaking, the problem of air leakage should be dealt with in time, and the next process can only be carried out after the polymerization kettle does not leak. The pressure charging method is used to detect whether the polymerization kettle is leaking. The leak detection method is simple and easy to operate. It can detect the leakage of the polymerization kettle in time and improve the safety of the full formula reaction op...

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Abstract

The invention discloses a preparation method of high-performance suspension PTFE. The method comprises the following steps of polymerizer leak finding, polymerizer vacuumizing, testing of water passing flow of a TOC processor, polymerizer water adding, polymerizer additive adding, polymerizer temperature raising, polymerizer deoxidizing, feeding preparation and PTFE preparation. Vacuumizing is conducted on polymerizer, water is added into the polymerizer after vacuumizing is conducted, various additives are added into the polymerizer, the temperature is raised to the reaction temperature through hot water, and when the oxygen content in the polymerizer is controlled to be qualified, a tetrafluoroethylene monomer is added for a reaction. A reaction system is a thermal decomposition system, operation is simple, time and labor are saved, the yield of the PTFE is generally high, and a side reaction is not prone to occur in the reaction. Meanwhile, the performance of all aspects of the product PTFE is promoted by adopting a high-temperature polymerization method.

Description

technical field [0001] The invention relates to the field of PTFE preparation, in particular to a preparation method of high-performance suspended PTFE. Background technique [0002] Polytetrafluoroethylene (PTFE) is generally called "non-stick coating" or "easy-to-clean material. This material is resistant to acids and alkalis, and various organic solvents, and is almost insoluble in all solvents. At the same time, polytetrafluoroethylene Vinyl fluoride has the characteristics of high temperature resistance, and its friction coefficient is extremely low, so it can be used for lubrication, and it has also become an ideal coating for the inner layer of water pipes that are easy to clean. Its production has solved many problems in the fields of chemical industry, petroleum, pharmaceuticals, etc. .PTFE seals, gaskets, and sealing washers are made of suspension polymerized PTFE resin molding. Compared with other plastics, PTFE has the characteristics of chemical corrosion resist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F114/26C08F2/18
Inventor 洪江永陈志冰缪建平陈伟峰孟庆文姜海涛任慧芳
Owner ZHEJIANG JUSHENG FLUOROCHEM
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