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Soap-free fluorocarbon emulsion prepared from perfluoroalkyl ethylenes through copolymerization and preparation method of soap-free fluorocarbon emulsion

A technology of perfluoroalkyl ethylene and fluorocarbon emulsion, applied in the direction of coating, can solve problems such as negative impact on the environment, and achieve the effect of low temperature stability, good ionic stability and stable performance

Active Publication Date: 2016-08-17
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of emulsifier is released into the environment after film formation, so it has a negative impact on the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 6500 ml of deionized water, 90 g of polymerizable DNS-86 emulsifier and 100 g of methacrylic acid into the reaction kettle, adjust the pH value of the system to 6.5 with sodium carbonate or sodium bicarbonate, and stir well. Add 90 grams of perfluorooctylethylene, 510 grams of butyl methacrylate, 1260 grams of methyl methacrylate and 40 grams of glycidyl methacrylate, and stir at high speed until the particle size of the emulsion droplet is less than 800nm, and maintain this stirring intensity , Nitrogen into the reactor, until the oxygen content in the emulsion is less than 80ppm. Under a nitrogen atmosphere, heat the emulsion in the reactor to 70°C, start to drop a solution made of 20 grams of potassium persulfate and 500 ml of deionized water, and complete the dropwise addition within 40 to 60 minutes at a constant temperature of 70°C. 5 hours, then the temperature was raised to 80°C, and the temperature was kept constant for 1 hour. Cool down to 30°C, add an ap...

Embodiment 2

[0028] Add 6000 ml of deionized water, 100 grams of polymerizable DNS-86 emulsifier and 120 grams of methacrylic acid into the reaction kettle, adjust the pH value of the system to 6.5 with sodium carbonate or sodium bicarbonate, and stir well. Add 90 grams of perfluoropentylethylene, 1369 grams of butyl methacrylate, 330 grams of methyl methacrylate and 60 grams of hydroxyethyl methacrylate, and stir at high speed until the particle size of the emulsion droplet is less than 800nm, and maintain this stirring intensity , Nitrogen into the reactor, until the oxygen content in the emulsion is less than 80ppm. Under a nitrogen atmosphere, heat the emulsion in the reactor to 70°C, start to drop a solution made of 12 grams of ammonium persulfate and 500 ml of deionized water, and complete the dropwise addition within 40 to 60 minutes at a constant temperature of 70°C. 5 hours, then the temperature was raised to 80°C, and the temperature was kept constant for 1 hour. Cool down to 30...

Embodiment 3

[0030] Add 5500 ml of deionized water, 100 grams of polymerizable ANPEO10-P1 emulsifier and 60 grams of 10-undecylenic acid into the reaction kettle, adjust the pH value of the system to 6.0-6.5 with sodium carbonate or sodium bicarbonate, and stir well . Add 430 grams of perfluorohexylethylene, 330 grams of butyl vinyl ether, 900 grams of vinyl acetate and 80 grams of diacetone acrylamide (DAAM), and stir at high speed until the particle size of the emulsion drops is less than 800nm. Nitrogen is passed through the reactor until the oxygen content in the emulsion is less than 80ppm. Under a nitrogen atmosphere, heat the emulsion in the reactor to 70°C, start to drop a solution made of 16 grams of ammonium persulfate and 500 ml of deionized water, and complete the dropwise addition within 40 to 60 minutes at a constant temperature of 70°C. 5 hours, then the temperature was raised to 80°C, and the temperature was kept constant for 1 hour. Cool down to 30°C, add an appropriate ...

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Abstract

The invention discloses soap-free fluorocarbon emulsion prepared from perfluoroalkyl ethylenes through copolymerization and a preparation method of the soap-free fluorocarbon emulsion. The soap-free fluorocarbon emulsion is prepared from the following raw materials in percentages by mass through copolymerization: 4-40% of a fluorine-containing component, 50-70% of a component which does not contain fluorine, 3-8% of a pigment dispersing component, 2-8% of a crosslinking component, and 2-8% of a polymerizable emulsifier component. The soap-free fluorocarbon emulsion prepared by the invention is good in mechanical stability, low-temperature stability and ion stability; the problem that an emulsifier of the conventional emulsion is released into the environment is avoided during film formation; and the soap-free fluorocarbon emulsion is environmentally friendly.

Description

technical field [0001] The invention belongs to the field of fluorine-containing polymer synthetic material manufacturing, and more specifically relates to the preparation of water-dispersed emulsion synthesis technology of copolymerization of perfluoroalkylethylene, acrylic acid monomer and alkyl vinyl ether by adopting soap-free emulsion polymerization technology. The present invention also relates to a water-based fluorine coating material of the above-mentioned water-dispersed soap-free emulsion. Background technique [0002] Fluorocarbon coatings enjoy the reputation of "king of coatings" due to their unique high weather resistance, self-cleaning, long life and long-term maintenance-free performance. Traditional fluorocarbon coatings are made by sintering polytetrafluoroethylene, polychlorotrifluoroethylene or polyvinylidene fluoride on the surface of the substrate at high temperature. Due to the complicated film forming process, the polymer film is easy to crystallize,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/06C08F214/18C08F220/32C08F220/28C08F218/08C08F220/64C08F216/14C08F220/58C08F2/26C08F2/30C09D133/12C09D133/10C09D131/04
CPCC09D131/04C09D133/10C09D133/12C08F2/26C08F2/30C08F218/08C08F220/14C08F220/18C08F220/1804C08F220/64C08F214/186C08F216/14C08F220/58C08F220/06C08F220/325C08F220/281
Inventor 孔庆刚刘飞施博文王静
Owner NANJING UNIV OF INFORMATION SCI & TECH
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