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

A technology of polyperfluoroethylene propylene and hexafluoropropylene, which is applied in the field of polyperfluoroethylene propylene resin and its solution polymerization preparation, can solve the problems of large fluorine-containing wastewater, short alkyl side chains, and poor modification effect, and achieve Less usage, low volatile matter, avoiding explosion effect

Active Publication Date: 2019-10-25
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 solution polymerization preparation method
  • Hexadecafluoro-1-octene modified polyperfluoroethylene propylene resin and its solution 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 process. 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 ...

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 a hexadecafluoro-1-octene modified polyperfluoro ethylene-propylene resin and a solution polymerization preparation method thereof. According to the solution polymerization preparation method, tetrafluoroethylene, hexafluoropropylene and hexadecafluoro-1-octene serve as copolymerizable monomers, wherein a molar fraction of the tetrafluoroethylene to hexafluoropropylene to hexadecafluoro-1-octene is (80-95):(4.9-15):(0.1-5). The preparation process comprises the following steps: adding a fluorine-containing solvent and copolymerizable monomers into a reactor at a certain temperature, raising the temperature to 20-60 DEG C, adding a perfluoro initiator to initiate a polymerization reaction under the pressure of 1.1-1.5MPa, supplementing the copolymerizable monomers in the reaction process, and finally preparing the modified polyperfluoro ethylene-propylene. The modified monomers are taken as polyperfluoro monomers, so that the prepared modified polyperfluoro ethylene-propylene resin is excellent in heat resistance, causes no aggregate dyeing phenomenon, can serve as a high-speed extrusion grade product and can be stably coated on a cable surface at a high speed of 300-500m / min.

Description

technical field [0001] The invention belongs to the technical field of perfluoroethylene propylene resin modification, and relates to hexadecafluoro-1-octene modified polyperfluoroethylene propylene resin and a solution polymerization preparation method thereof. Background technique [0002] Polyperfluoroethylene propylene is an earlier commercialized copolymer of tetrafluoroethylene after polytetrafluoroethylene. It is a melt-processable perfluoroplastic, and commercial products appeared in the 1960s. On the basis of polytetrafluoroethylene, the synthesis, molding processing and industrial application of polyperfluoroethylene propylene resin have developed rapidly and matured. Polyperfluoroethylene propylene resin has almost all the excellent properties of polytetrafluoroethylene resin. Its unique advantage is that it can be melt-processed. Through injection molding and extrusion molding, the introduction of hexafluoropropylene reduces the melting point and melt viscosity o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/26C08F214/28C08F214/18C08F2/06C08L27/18
CPCC08F2/06C08F214/26C08L27/18C08L2201/08C08L2203/202C08F214/28C08F214/182
Inventor 邵春明余晓斌王树华陈振华
Owner JUHUA GROUP TECH CENT
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