Continuous condensation method of perfluorinated ethylene propylene emulsion
A technology of agglomeration method and continuous method, applied in the field of continuous agglomeration of polyperfluoroethylene propylene emulsion, can solve the problems of complex process, low equipment utilization rate, unfavorable washing, continuous drying and granulation process, etc.
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[0042] Example 1
[0043] 1. Preparation of polyperfluoroethylene propylene resin emulsion
[0044] 1600L of deionized water and 1800g of ammonium perfluorooctanoate dispersant were added to the 2000L high-pressure reaction kettle, and the pressure test was leak-proof with nitrogen. After the oxygen content was qualified by the evacuation analysis, a quantitative initial monomer (mass ratio, Wt ( TFE): Wt (HFP)=about 20:80) and heating up, when the temperature reaches 100 ° C and the pressure reaches 3.2 MPa; 90 grams of initiator potassium persulfate is injected into the polymerization kettle with a metering pump, and the reaction is started. The pump will add the additional monomer (mass ratio, Wt(TFE):Wt(HFP)=about 95:5) into the polymerization kettle, maintaining the reaction pressure unchanged; when the amount of the additional monomer reaches the specified value, the reaction is stopped. The solid content of the obtained polymerized emulsion was 30 wt %, the specific gr...
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[0047] Example 2
[0048] 1. Preparation of polyperfluoroethylene propylene resin emulsion
[0049] 1600L of deionized water and 1800g of ammonium perfluorooctanoate dispersant were added to the 2000L high-pressure reaction kettle, and the pressure test was leak-proof with nitrogen. After the oxygen content was qualified by the evacuation analysis, a quantitative initial monomer (mass ratio, Wt ( TFE):Wt(HFP)=about 30:70) and heating up, when the temperature reaches 100 ° C and the pressure reaches 3.2MPa; 90 grams of initiator potassium persulfate is injected into the polymerization kettle with a metering pump, and the reaction is started, and the membrane The additional monomer (mass ratio, Wt(TFE):Wt(HFP)=about 80:20) will be added to the polymerization kettle by a pump to keep the reaction pressure unchanged; when the amount of additional monomers reaches the specified value, the reaction will be stopped. The solid content of the obtained polymerized emulsion was 30 wt ...
Example Embodiment
[0052] Example 3
[0053] 1. Preparation of polyperfluoroethylene propylene resin emulsion
[0054] 1600L of deionized water and 1800g of ammonium perfluorooctanoate dispersant were added to the 2000L high-pressure reaction kettle, and the pressure test was leak-proof with nitrogen. After the oxygen content was qualified by the evacuation analysis, a quantitative initial monomer (mass ratio, Wt ( TFE): Wt (HFP)=about 25:75) and heating up, when the temperature reaches 100 ° C and the pressure reaches 3.2 MPa; 90 grams of initiator potassium persulfate is injected into the polymerization kettle with a metering pump, and the reaction is started. The additional monomer (mass ratio, Wt(TFE):Wt(HFP)=about 85:25) will be added to the polymerization kettle by a pump to keep the reaction pressure unchanged; when the amount of the additional monomer reaches the specified value, the reaction will be stopped. The solid content of the obtained polymerized emulsion was 30 wt %, the spec...
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