Hexadecafluoro-1-octene modified polyperfluoroethylene propylene resin and its bulk polymerization preparation method

A technology of polyperfluoroethylene propylene and bulk polymerization, which is applied in the field of polyfluoroethylene propylene resin modification, can solve the problems of poor modification effect, large fluorine-containing wastewater, short alkyl side chains, etc., and achieve fast reaction rate, The effect of less usage and low volatile content

Active Publication Date: 2019-12-13
JUHUA GROUP TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the perfluoromethyl vinyl ether, perfluoroethyl vinyl ether or perfluoropropyl vinyl ether used has short alkyl side chains, and the modification effect is not as significant as that of long side chains.
In addition, water is used as the reaction medium in the reaction process, emulsifiers such as perfluoropolyether are used, and fluorocarbon solvents are added, which will generate a large amount of fluorine-containing wastewater

Method used

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  • Hexadecafluoro-1-octene modified polyperfluoroethylene propylene resin and its bulk polymerization preparation method
  • Hexadecafluoro-1-octene modified polyperfluoroethylene propylene resin and its bulk polymerization preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 3000g of pre-added comonomers (including 72mol% of hexafluoropropylene (hereinafter referred to as HFP), 20mol% of tetrafluoroethylene (hereinafter referred to as TFE), 8mol% of hexadecafluoro-1-octene) in a 5L reactor , Then the reactor was heated to 60° C. with stirring, and then 3.2 g of perfluorocyclohexyl peroxide was added to it. At this time, the set pressure of the reactor was 1.5 MPa, and the pressure was maintained by adding comonomers (including 20 mol% HFP and 80 mol% TFE) during the copolymerization. Copolymerization was carried out until 1200 g of additional comonomer was consumed. After the copolymerization process is finished, the reaction product is cooled to 40° C., and the balance valve connecting the reactor to the post-processing equipment in the closed space is opened. The post-processing equipment is connected with the monomer vapor direct cooler and the condensate collector. The reactants are sent from the polymerization reactor to the post...

Embodiment 2

[0028] Add 2500g pre-added comonomers (comprising 79mol% of HFP, 20mol% of TFE, 1mol% of hexadecafluoro-1-octene) in the 5L reactor, then the reactor is heated to 40°C under stirring, after that To this was added 4 g of perfluorocyclohexyl peroxide. At this time, the set pressure of the reactor was 1.3 MPa, and the pressure was maintained by adding comonomers (including 7 mol% HFP, 88 mol% TFE, and 5 mol% hexadecafluoro-1-octene) during the copolymerization process. After 200 g of these mixtures were consumed, 0.3 g of cyclohexane was added to the reactor and the copolymerization was continued. Copolymerization was carried out until 1200 g of additional comonomer was consumed. After the copolymerization process is finished, the reaction product is cooled to 40° C., and the balance valve connecting the reactor to the post-processing equipment in the closed space is opened. The post-processing equipment is connected with the monomer vapor direct cooler and the condensate colle...

Embodiment 3

[0030]Add 1200g dichloropentafluoropropane, 2500g pre-added comonomer (comprising 77mol% of HFP, 20mol% of TFE, 3mol% of hexadecafluoro-1-octene) in the 5L reactor, then the reactor is under stirring condition It was heated to 20° C., and then 4 g of perfluorocyclohexyl peroxide was added thereto. At this time, the set pressure of the reactor was 1.1 MPa, and the pressure was maintained by adding comonomers (including 11 mol% of HFP, 88 mol% of TFE, and 1 mol% of hexadecafluoro-1-octene) during the copolymerization process. After 200 g of these mixtures were consumed, 0.15 g of cyclohexane was added to the reactor and the copolymerization was continued. Copolymerization was carried out until 1200 g of additional comonomer was consumed. After the copolymerization process is finished, the reaction product is cooled to 40° C., and the balance valve connecting the reactor to the post-processing equipment in the closed space is opened. The post-processing equipment is connected w...

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Abstract

The invention discloses hexadecafluoro-1-octene modified fluorinated ethylene-propylene resin and a bulk polymerization preparation method thereof. The method includes the steps that tetrafluoroethylene, hexafluoropropylene and hexadecafluoro-1-octene serve as comonomers, the comonomers are pre-added into a reactor under a certain temperature, the temperature is increased to 20-60 DEG C, the pressure is 1.1-1.5 MPa, a perfluoro initiator is added to initiate a polymerization reaction, a certain quantity of comonomers are replenished in the reaction process, and modified fluorinated ethylene-propylene is obtained finally. According to the method, the adopted modified monomers are perfluoro monomers, the obtained modified fluorinated ethylene-propylene resin is excellent in heat resistance, granules of the modified fluorinated ethylene-propylene resin are free of color staining, and the modified fluorinated ethylene-propylene resin can serve as a high-speed extrusion-grade product and can be stably smeared on the surface of a cable at the high speed of 300-500 m / min.

Description

technical field [0001] The invention belongs to the technical field of polyperfluoroethylene propylene resin modification, and relates to a bulk polymerization preparation method of hexadecafluoro-1-octene modified polyperfluoroethylene propylene resin. Background technique [0002] Polyfluoroethylene propylene (FEP) is a copolymer of tetrafluoroethylene (TFE) and hexafluoropropylene (HFP). Structure. Due to the introduction of HFP monomer unit, it is equivalent to destroying the symmetry of polytetrafluoroethylene molecular chain, reducing its crystallinity, melting point and viscosity, making polyperfluoroethylene propylene a fluorine material with excellent comprehensive properties, which can be melt extruded Plastic, molding, spraying and other general thermoplastic processing methods for processing. Polyperfluoroethylene propylene is an important tetrafluoroethylene copolymer. Its performance is equivalent to that of polytetrafluoroethylene except that its maximum ser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/26C08F214/28C08F214/18C08F2/02C08F2/38
CPCC08F2/02C08F2/38C08F214/26C08F214/28C08F214/182Y02P20/582
Inventor 邵春明王树华余晓斌陈振华
Owner JUHUA GROUP TECH CENT
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