Preparation method of high-performance suspension PTFE

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...

AI Technical Summary

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.

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