Hexadecafluoro-1-octene modified polyperfluoro ethylene-propylene resin and emulsion polymerization preparation method thereof

A technology of polyperfluoroethylene propylene and hexafluoropropylene, which is applied in the field of preparation of polyperfluoroethylene propylene resin and its emulsion polymerization, can solve the problems of short alkyl side chains and poor modification effect, and achieve low volatile matter and high polymerization Fast speed and stable response

Inactive Publication Date: 2017-09-05
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.

Method used

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  • Hexadecafluoro-1-octene modified polyperfluoro ethylene-propylene resin and emulsion polymerization preparation method thereof
  • Hexadecafluoro-1-octene modified polyperfluoro ethylene-propylene resin and emulsion polymerization preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 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

[0031] 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

[0033]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 an emulsion polymerization preparation method thereof. The method comprises the following steps: adding deionized water accounting for 50-70% of total volume into a reactor with a stirrer; replacing until oxygen content is qualified, adding an emulsifier or other aids, tetrafluoroethylene, hexafluoropropylene and hexadecafluoro-1-octene and other pre-added copolymerizable monomers; starting to stir and raising the temperature to 60-120 DEG C, controlling the reaction pressure to be 2-5MPa, adding an initiator, supplementing a certain amount of copolymerizable monomers so as to obtain polymer emulsion; and condensing, washing and drying the emulsion, thereby obtaining the modified polyperfluoro ethylene-propylene resin. According to the method disclosed by the invention, the hexadecafluoro-1-octene modified monomer serves as a perfluoro monomer, the prepared modified polyperfluoro ethylene-propylene resin is excellent in heat resistance, does not have an aggregate dyeing phenomenon, can serve as a high-speed extrusion grade product, and can be stably coated onto the cable surface at a high speed of 300-500m/min.

Description

technical field [0001] The invention belongs to the technical field of polyperfluoroethylene propylene resin modification, and relates to polyperfluoroethylene propylene resin modified by hexadecafluoro-1-octene and its emulsion polymerization preparation method. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/26C08F214/28C08F214/18C08F2/28C08L27/18
CPCC08F214/26C08F2/28C08L27/18C08L2201/08C08L2203/202C08F214/28C08F214/182
Inventor 邵春明余晓斌王树华陈振华
Owner JUHUA GROUP TECH CENT
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