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Coating material type polyvinylidene fluoride polymer preparation method

A technology of vinylidene fluoride and paint, applied in the direction of coating, etc., can solve the problem of unsatisfactory gloss of paint

Active Publication Date: 2017-05-31
ZHEJIANG RES INST OF CHEM IND CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When coatings are formulated with coating grade polyvinylidene fluoride resins prepared by traditional processes, the gloss of the coatings is not satisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 6 grams of hexafluoropropylene oxide trimer ammonium carboxylate and 114 g of pure water were prepared in advance into 120 grams of emulsifier aqueous solution. Add 2.1 grams of di-n-propyl peroxydicarbonate, 250 grams of pure water and 15 grams of emulsifier aqueous solution into the container, and mix the components uniformly under the action of a high-speed homogenizer to prepare an emulsion for use.

[0037] In a 5.5-liter horizontal autoclave, inject 2500 grams of pure water and 105 grams of the above-mentioned emulsifier aqueous solution. Close the reaction kettle, start stirring, vacuumize and replace with high-purity argon, the above process is cycled five times and ends with vacuumize. Inject 6 grams of acetone and 100 grams of vinylidene fluoride monomer into the reactor, start heating the reactor to raise the temperature of the reactor to 55°C, and then continue to add vinylidene fluoride monomer into the reactor until the pressure of the reactor reaches 4.5...

Embodiment 2

[0045] 5 grams of hexafluoropropylene oxide trimer ammonium carboxylate and 95 g of pure water were prepared in advance into 100 grams of emulsifier aqueous solution. Add 4.9 grams of tert-butyl peroxypivalate, 500 grams of pure water and 25 grams of emulsifier aqueous solution in the container, and each component is evenly mixed under the effect of a high-speed homogenizer to prepare an emulsion for use.

[0046] In a 5.5-liter horizontal autoclave, inject 2500 grams of pure water and 75 grams of the above-mentioned emulsifier aqueous solution. Close the reaction kettle, start stirring, vacuumize and replace with high-purity argon, the above process is cycled five times and ends with vacuumize. Inject 3 grams of isopropanol and 100 grams of vinylidene fluoride monomer into the reactor, start heating the reactor to raise the temperature of the reactor to 85°C, and then continue to add vinylidene fluoride monomer to the reactor until the pressure of the reactor Reach 7.0MPa. ...

Embodiment 3

[0049] 7.75 grams of hexafluoropropylene oxide pentamer ammonium carboxylate and 147.25 grams of pure water were prepared in advance into 155 grams of emulsifier aqueous solution. Add 6.5 grams of diisopropyl peroxydicarbonate, 1000 grams of pure water and 30 grams of emulsifier aqueous solution into the container, and mix the components evenly under the action of a high-speed homogenizer to prepare an emulsion for use.

[0050] In a 100-liter horizontal autoclave, inject 2500 grams of pure water and 125 grams of the above-mentioned emulsifier aqueous solution. Close the reaction kettle, start stirring, vacuumize and replace with high-purity argon, the above process is cycled five times and ends with vacuumize. Inject 4 grams of ethyl acetate and 100 grams of vinylidene fluoride monomer into the reactor, start heating the reactor to raise the temperature of the reactor to 60°C, and then continue to add vinylidene fluoride monomer to the reactor until the reaction kettle The p...

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PUM

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Abstract

A purpose of the present invention is to provide a method for preparing a coating-material-grade polyvinylidene fluoride homopolymer through emulsion polymerization. According to the present invention, by controlling the adding method of the emulsion during the preparation process, the performance of the prepared vinylidene fluoride homopolymer is controlled, and finally the gloss of the coating material is controlled.

Description

technical field [0001] The invention relates to a preparation method of a polyvinylidene fluoride polymer, in particular to a preparation method of a coating type polyvinylidene fluoride polymer. Background technique [0002] Polyvinylidene fluoride resin has -CH on the molecular backbone 2 and-CF 2 The formed highly alternating structure endows the polyvinylidene fluoride resin with excellent resistance to ultraviolet radiation, and also makes it one of the known fluorocarbon coatings with the best weather resistance. Compared with other fluorocarbon coatings such as tetrafluoroethylene-based coatings and chlorotrifluoroethylene-based coatings, polyvinylidene fluoride coatings have the best comprehensive performance in terms of fluorine content and coating construction technology, and currently occupy the Dominance of high-temperature film-forming solvent-based fluorocarbon coatings. [0003] For the polymerization of coating grade polyvinylidene fluoride resin, there ar...

Claims

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Application Information

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IPC IPC(8): C08F114/22C08F2/26C09D127/16C09D133/00
CPCC08F2/26C08F114/22C09D127/16C08L33/00
Inventor 王佩刚
Owner ZHEJIANG RES INST OF CHEM IND CO LTD
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