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Vinylidene fluoride modified polyperfluoroethylene propylene resin and preparation method thereof

A technology of polyperfluoroethylene propylene and vinylidene fluoride, which is applied in the field of polymer chemistry, can solve the problems of insufficient environmental protection and high melting point of perfluoropolyethylene propylene resin, and achieve the effects of easy realization, good processability and good chemical stability

Active Publication Date: 2016-10-12
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

[0004] Aiming at the defect that the synthesis method of perfluoropolyethylene propylene resin in the prior art is not environmentally friendly and the melting point of the synthesized perfluoropolyethylene propylene resin is high, the first purpose of the present invention is to provide a vinylidene fluoride modified polyfluoroethylene Preparation method of fluoroethylene propylene resin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Add 32L of deionized water to a 50L reactor. The reactor should be vacuumed. When the oxygen content is ≤30ppm, add 35g of sodium perfluorooctanoate and heat the contents of the reactor to 60°C.

[0028] 2) Mix the initial reaction monomers vinylidene fluoride, tetrafluoroethylene and hexafluoropropylene uniformly at a molar ratio of 6:11:3, and pass it into the reactor, and add 15g of persulfuric acid after the pressure in it rises to 3.0MPa Potassium and 25g diethyl malonate start to react. During the reaction, additional mixed monomers are added to maintain the absolute pressure in the reactor at 3.0±0.02MPa, and additional mixed monomers vinylidene fluoride, tetrafluoroethylene and six The molar ratio of fluoropropene is 7:11:2.

[0029] 3) When the solid content of the emulsion reaches about 30% (mass percentage), the polymerization reaction is terminated, unreacted monomers are recovered, and the emulsion is put into the coagulation bucket.

[0030] 4) Adding ...

Embodiment 2

[0032] 1) Add 32L of deionized water to a 50L reactor. The reactor should be evacuated. When the oxygen content is ≤30ppm, add 35g of potassium perfluorooctanoate and heat the contents of the reactor to 55°C.

[0033] 2) Mix the initial reaction monomers vinylidene fluoride, tetrafluoroethylene and hexafluoropropylene uniformly at a molar ratio of 6:11:3, and pass it into the reactor, and add 15g of persulfuric acid after the pressure in it rises to 3.0MPa Potassium and 25g diethyl malonate start to react. During the reaction, additional mixed monomers are added to maintain the absolute pressure in the reactor at 3.0±0.02MPa, and additional mixed monomers vinylidene fluoride, tetrafluoroethylene and six The molar ratio of fluoropropene is 5:12:3.

[0034] 3) React until the solid content of the emulsion reaches about 30% (mass percentage), end the polymerization reaction, recover unreacted monomers, and put the emulsion into the coagulation bucket.

[0035] 4) Adding concentr...

Embodiment 3

[0037] 1) Add 32L of deionized water to a 50L reactor. The reactor should be evacuated. When the oxygen content is ≤30ppm, add 35g of ammonium perfluorooctanoate and heat the contents of the reactor to 65°C.

[0038] 2) Mix the initial reaction monomers vinylidene fluoride, tetrafluoroethylene and hexafluoropropylene uniformly in a molar ratio of 5:8:2, and lead to the reactor, and add 15g of persulfuric acid after the pressure in it rises to 3.0MPa Potassium and 25g diethyl malonate start to react. During the reaction, additional mixed monomers are added to maintain the absolute pressure in the reactor at 3.0±0.02MPa, and additional mixed monomers vinylidene fluoride, tetrafluoroethylene and six The molar ratio of fluoropropene is 2:14:3.

[0039] 3) When the solid content of the emulsion reaches about 30% (mass percentage), the polymerization reaction is terminated, unreacted monomers are recovered, and the emulsion is put into the coagulation bucket.

[0040] 4) Each addit...

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Abstract

The invention relates to vinylidene fluoride modified polyfluorinared ethylene propylene resin and a preparation method thereof. The preparation method of the vinylidene fluoride modified polyfluorinared ethylene propylene resin comprises the following steps: 1) adding water accounting for 60-70% of the total volume into a reaction kettle, vacuumizing the reaction kettle, adding a dispersing agent, and heating the reaction kettle to a certain temperature; 2) adding a mixture of polymeric monomers into the reaction kettle, adding an initiating agent and a chain transferring agent after a certain pressure is formed in the reaction kettle for carrying out copolymerization reaction, and continuously introducing the mixture of polymeric monomers in a reaction process, and thus the reaction kettle maintains a constant pressure; 3) finishing reaction when solid content of emulsion reaches up to 25-35%, and recycling unreacted monomers to obtain emulsion polymer; and 4) adding magnesium chloride solution into the obtained emulsion for carrying out coagulation, and drying products, thus obtaining the vinylidene fluoride modified polyfluorinared ethylene propylene resin finished product. The synthesis steps are simple and environmental friendly and are easy to realize, and the obtained vinylidene fluoride modified polyfluorinared ethylene propylene resin has low melting point and can be applied to the fields of electronic and electrical industry, chemical industry and the like.

Description

technical field [0001] The invention relates to vinylidene fluoride modified polyperfluoroethylene propylene resin and a preparation method thereof, belonging to the field of polymer chemistry. Background technique [0002] FEP resin not only has the excellent performance of polytetrafluoroethylene resin but also has the characteristics of thermoplastic processing and molding. It has extremely high chemical stability, excellent electrical insulation, good mechanical properties, and low friction coefficient. Non-absorbent, non-sticky surface and wind erosion resistance, etc. [0003] US3528954 discloses tetrafluoroethylene and hexafluoropropylene mixed monomers in fluorine-containing organic solvents, and synthesizes polyperfluoroethylene propylene with an organic initiator. Although the resulting product has high thermal stability, the polymerization reaction adopts solvent polymerization. In the polymerization process, Freon-113, an atmospheric ozone-destroying solvent, is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/26C08F214/28C08F214/22C08F6/22
Inventor 余金龙常映军兰军张廷健王先荣
Owner ZHONGHAO CHENGUANG RES INST OF CHEMICALINDUSTRY CO LTD