A kind of method for preparing fusible ptfe

Abstract

The invention discloses a method for preparing fusible PTFE, which comprises the following steps: a. performing polymerization; b. adding preheated deionized water and an initiator; c. heating up to 100° C., and then carrying out heat preservation; d. Inclined fast docking and collecting solid materials, and then place solid materials horizontally; e, discharge solid materials obliquely, filter, wash and dry to obtain fusible polytetrafluoroethylene powder; f, solid material collection box returns to its original position start position. The invention can improve the fluidity of solid materials, avoiding the accumulation of collected solid materials to obtain blocky solid materials; it can make the outlet of the anaerobic polymerization kettle inclined and the collection port of the solid material collection box pass through the material pipe straight connection, so as to ensure the smooth collection of solid materials and reduce the setting of elbows; the two operating spaces for collecting solid materials in the early stage and obliquely discharging solid materials in the later stage are independent of each other without interfering with each other, and there is sufficient available space for convenient collection or The ejected device is installed.

Description

technical field [0001] The invention belongs to the technical field of polytetrafluoroethylene resins, and in particular relates to a method for preparing fusible PTFE. Background technique [0002] Fusible polytetrafluoroethylene is a copolymer of tetrafluoroethylene and a small amount of perfluoroalkyl vinyl ether. [0003] The synthesis of fusible polytetrafluoroethylene has been introduced in detail in many patents at home and abroad: For example, a Chinese patent disclosed a preparation method named fusible polytetrafluoroethylene on 2016.11.18 (application number: CN201611023995 .9) the invention patent, which adds solvent, polymerization monomer and chain transfer agent to the oxygen-free polymerization kettle in a certain proportion. After the temperature of the polymerization kettle is raised to the set value, an initiator is added into the kettle to start the polymerization reaction, and the pressure inside the kettle is controlled to be constant by adding tetrafl...

AI Technical Summary

Problems solved by technology

However, in the above-mentioned preparation method of fusible polytetrafluoroethylene, the collected solid materials are easy to accumulate, resulting in blocky solid materials, which is inconvenient for subsequent filtering, washing and drying operations.

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