Low gel content vinylidene fluoride thermoplastic resin, preparation method and applications thereof

A technology of thermoplastic resin and vinylidene fluoride, which is applied in the field of vinylidene fluoride thermoplastic resin with low gel content and its preparation, and can solve the problems of poor thermal stability and the like

Active Publication Date: 2019-05-07
ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] PVDF homopolymer is a semi-crystalline substance. Without suitable processing aids and compounding agents, when PVDF directly melts and processes films and extruded products, it can be observed that the products turn yellow, burnt, and the appearance of the products is still black. Defects such as spots, crystal points and holes are still less used now, and the thermal stability during the main melting process is relatively poor

Method used

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  • Low gel content vinylidene fluoride thermoplastic resin, preparation method and applications thereof
  • Low gel content vinylidene fluoride thermoplastic resin, preparation method and applications thereof
  • Low gel content vinylidene fluoride thermoplastic resin, preparation method and applications thereof

Examples

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Embodiment 1

[0063] This embodiment provides a vinylidene fluoride thermoplastic resin with low gel content, and also provides its preparation method.

[0064] Preparation of Vinylidene Fluoride-Based Fluoropolymer A:

[0065] In a 50L stainless steel vertical reaction kettle, add 33.3L of deionized water, blow nitrogen and oxygen three times, evacuate until the oxygen content is less than or equal to 25ppm, add 80g of fluorine-containing compound emulsifier, 400ml of liquid paraffin (liquid at room temperature), and start stirring , the speed is 200rpm, the temperature is raised to 60°C, and vinylidene fluoride monomer is added to 3.5MPa. After the system is stable, 40g of isopropanol is added to the reactor through a metering pump, and 40ml of IPP (dicarbonate peroxide) is added to the reactor after a few minutes. Diisopropyl ester) into the reactor to start the polymerization reaction. At the same time, continuously add mixed monomers to keep the pressure of the reactor at 3.5 MPa unti...

Embodiment 2

[0070] This embodiment provides a low gel content vinylidene fluoride thermoplastic resin, which is prepared from 30Kg of fluoropolymer A and 1.5Kg of fluoropolymer B;

[0071] Wherein, the fluorine-containing polymer A is a homopolymer of vinylidene fluoride; the fluorine-containing polymer B is a PVDF-CTFE polymer emulsion, which contains 95 mol% of vinylidene fluoride and 5 mol% of chlorotrifluoroethylene.

[0072] Fluoropolymer A and Fluoropolymer B are preferably prepared by using Example 1.

Embodiment 3

[0074] This embodiment provides a low gel content vinylidene fluoride thermoplastic resin, which is prepared from 32Kg of fluoropolymer A and 1.1Kg of fluoropolymer B;

[0075] Wherein, the fluoropolymer A is: PVDF-TFE polymer emulsion, which contains 80mol% vinylidene fluoride and 20mol% tetrafluoroethylene;

[0076] Fluorine-containing polymer B is: PVDF-TFE-HFP polymer emulsion, which contains 70 mol% of vinylidene fluoride, 10 mol% of tetrafluoroethylene and 20 mol% of hexafluoropropylene.

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Abstract

The invention relates to the field of organic chemical materials, particularly to a low gel content vinylidene fluoride thermoplastic resin, wherein the raw materials comprise two different fluorine-containing polymers A and B, the fluorine-containing polymer A is the homopolymer or copolymer of vinylidene fluoride having a melting point of 100-175 DEG C, and the fluorine-containing polymer B is an elastomer material or a plastic material having a melting point of less than 210 DEG C. According to the present invention, during the processing of the low gel content vinylidene fluoride thermoplastic resin, the adhesion is improved, and the good processing fluidity is achieved; and the properties of the original polymer are retained, the processing defects between the polymers are compensated, the production cost is low, the thermal stability at a high temperature is good, the gel content is low, the product defects are less, and the applications of the vinylidene fluoride resin are broadened.

Description

technical field [0001] The invention relates to the field of organic chemical materials, in particular to a vinylidene fluoride thermoplastic resin with low gel content and its preparation method and application. Background technique [0002] Vinylidene fluoride (VDF) resin not only has excellent weather resistance, heat resistance, chemical corrosion resistance and electrical properties, but also has good melt processing performance, that is, the processable temperature of polyvinylidene fluoride (PVDF) resin from melting point to decomposition point The domain is wide and exhibits good melt flow characteristics. [0003] PVDF homopolymer is a semi-crystalline substance. Without suitable processing aids and compounding agents, when PVDF directly melts and processes films and extruded products, it can be observed that the products turn yellow, burnt, and the appearance of the products is still black. Defects such as spots, crystal points, and holes are still rare, and the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08F114/22C08F214/22C08F214/24C08F6/14
Inventor 王先荣汪仲权张廷健曾波余金龙龚蓉
Owner ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD
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