Preparation process of polyvinylidene fluoride

A technique for preparing polyvinylidene fluoride, which is applied in the field of preparation of polyvinylidene fluoride, can solve problems such as unsatisfactory satisfaction, and achieve good thermal stability and processability

Inactive Publication Date: 2015-04-08
CHANGSHU LIYUAN MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

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Embodiment Construction

[0009] The specific embodiments of the present invention will be further described below with reference to the examples. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

[0010] The technical scheme of the specific implementation of the present invention is:

[0011] A preparation process of polyvinylidene fluoride, comprising the steps:

[0012] 1) Put 2.1 parts by weight of hydrogen peroxide and 1.8 parts by weight of inorganic alkali solution into the reaction kettle, mix them evenly, then put in 11.3 parts by weight of dichlorodifluoromethane solvent and 0.2 parts by weight of perfluorobutylsulfonyl fluoride solution, and stir at -6°C reaction for 30 minutes;

[0013] 2) Add 6.7 parts by weight of polypropylene glycol solution, 72 parts by weight of vinylidene fluoride monomer, and 2.5 parts by weight of isopropylcyclopentane, and s...

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PUM

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Abstract

The invention discloses a preparation process of polyvinylidene fluoride. The preparation process comprises the following steps of (1) adding 2.1 parts of hydrogen peroxide and 1.8 parts of an inorganic alkaline solution into a reaction kettle, uniformly mixing, then, adding 11.3 parts of a dichlorodifluoromethane solvent and 0.2 part of a perfluorobutanesulforyl fluoride solution, and reacting while stirring at the temperature of 6 DEG C below zero for 30 minutes; (2) introducing 6.7 parts of a polypropylene glycol solution, 72 parts of vinylidene fluoride monomers and 2.5 parts of isopropylcyclopentane, reacting while stirring at the temperature of 35 DEG C, and stopping reacting when the pressure is reduced to be less than 0.21MPa; and (3) filtering, washing and drying to obtain the powdery polyvinylidene fluoride. The polyvinylidene fluoride prepared by using the preparation process is favorable in thermal stability and processability and capable of meeting the requirements of production processes such as injection molding, extrusion and film drawing.

Description

technical field [0001] The invention relates to a preparation process of polyvinylidene fluoride. Background technique [0002] The thermal stability and processability of the existing vinylidene fluoride materials need to be improved, and in particular, they cannot well meet the production processes such as injection molding, extrusion and film drawing. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a preparation process of polyvinylidene fluoride, and the prepared vinylidene fluoride has good thermal stability and processability, and can meet the production processes of injection molding, extrusion and film drawing. [0004] To achieve the above object, the technical scheme of the present invention is to design a preparation process of polyvinylidene fluoride, comprising the following steps: [0005] 1) Put 2.1 parts by weight of hydrogen peroxide and 1.8 parts by weight of inorganic alkali solution into the reaction kettle, mix the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F114/22
Inventor 徐建林邹建良宗建青仇峰
Owner CHANGSHU LIYUAN MEMBRANE TECH
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