Method for preparing polyperfluorinated ethylene propylene from perfluorodiacyl peroxide initiator
A technology of perfluoroacyl peroxide and polyperfluoroethylene propylene is applied in the field of fluorine chemical industry to achieve the effect of reducing equipment investment, reducing production cost, good stability and weather resistance
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[0019] Example 1
[0020] After replacing the 2L reactor with nitrogen and evacuating, add 800 g of deionized water to the reactor, and then pass 400 g of excess perfluoropropylene monomer into the reactor; increase the temperature of the reactor to make the temperature in the reactor reach 10°C , Directly add 0.1g perfluorobutyryl peroxide into the reaction kettle; then pass in tetrafluoroethylene monomer to make the pressure in the kettle reach 1.40MPa, and then start stirring for the reaction; during the reaction process, continuously feed the reaction kettle The tetrafluoroethylene monomer is introduced into the reactor, and the pressure in the reactor is maintained at 1.30MPa by adjusting the size of the feed valve switch of the reactor; after 7 hours of reaction, the reaction is terminated, the material is discharged, and the prepared copolymer is heated in a thermostat to Remove residual initiator.
Example Embodiment
[0021] Example 2
[0022] After replacing the 2L reactor with nitrogen and evacuating, add 800 g of deionized water to the reactor, and then pass 400 g of excess perfluoropropylene monomer into the reactor; increase the temperature of the reactor to make the temperature in the reactor reach 25°C , Directly add 0.3g of perfluoro(3,6-dioxaoctanoyl) peroxide to the reaction kettle; then pass in tetrafluoroethylene monomer to make the pressure in the kettle reach 1.10MPa, and then start stirring for the reaction; During the reaction process, tetrafluoroethylene monomer was continuously fed into the reactor, and the pressure in the reactor was maintained at 1.10MPa by adjusting the size of the feed valve switch of the reactor; after 5 hours of reaction, the reaction was completed, the material was discharged, and the preparation The copolymer is heated in a thermostat to remove residual initiator.
Example Embodiment
[0023] Example 3
[0024] After replacing the 2L reactor with nitrogen and evacuating, add 800g of deionized water to the reactor, and then pass 400g of excess perfluoropropylene monomer into the reactor; increase the temperature of the reactor to bring the temperature in the reactor to 40℃ , Directly add 0.5g of perfluoro(2-methyl-3-oxahexanoyl) peroxide into the reaction kettle; then pass in tetrafluoroethylene monomer to make the pressure in the kettle reach 0.80MPa, then start stirring to react During the reaction process, tetrafluoroethylene monomer is continuously fed into the reactor, and the pressure in the reactor is maintained at 0.80MPa by adjusting the size of the feed valve switch of the reactor; after 3 hours of reaction, the reaction is terminated and the material is discharged. The prepared copolymer is heated in a thermostat to remove residual initiator.
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