Production process of polyvinylidene fluoride

Abstract

The invention discloses a production process of polyvinylidene fluoride. The production process comprises the following steps of (1) adding 3.2 parts by weight of hydrogen peroxide and 3.4 parts by weight of an inorganic alkali solution into a reaction kettle, uniformly mixing, then, adding 6.7 parts by weight of a monofluorodichloroethane solvent and 0.6 part by weight of a bromodifluoroacetyl fluoride solution, and reacting at the temperature of 7 DEG C below zero for 40 minutes by stirring; (2) introducing 1.6 parts by weight of a sodium hexametaphosphate solution, 93 parts by weight of vinylidene fluoride monomers and 2.4 parts by weight of 2-methyl-1-ethyl cyclopentane, reacting at the temperature of 27 DEG C by stirring, and stopping reacting when the pressure is reduced to be smaller than 0.29MPa; and (3) filtering, washing and drying to obtain powdery polyvinylidene fluoride. Polyvinylidene fluoride prepared by using the production process is favorable in thermal stability and processibility and capable of meeting the requirements of production processes such as injection molding, extruding and film drawing.

Description

technical field [0001] The invention relates to a production process of polyvinylidene fluoride. Background technique [0002] The thermal stability and processability of the existing vinylidene fluoride materials need to be improved, especially the production processes such as injection molding, extrusion and film drawing cannot be well satisfied. Contents of the invention [0003] The object of the present invention is to provide a production process of polyvinylidene fluoride, the vinylidene fluoride produced by it has good thermal stability and processability, and can meet the production processes of injection molding, extrusion and film drawing. [0004] In order to achieve the above object, the technical solution of the present invention is to design a production process of polyvinylidene fluoride, comprising the steps of: [0005] 1) Put 3.2 parts by weight of hydrogen peroxide and 3.4 parts by weight of inorganic alkali solution into the reaction kettle, mix them ...

AI Technical Summary

Problems solved by technology

[0002] The existing vinylidene fluoride materials need to be improved in terms of thermal stability and processability, especially in the production processes such as injection molding, extrusion and film drawing.