Preparation method of ethylene-tetrafluoroethylene copolymer resin

A tetrafluoroethylene copolymer resin and tetrafluoroethylene technology are applied in the field of fluorine-containing plastics and their preparation, which can solve the problems of high initiation temperature of inorganic peroxides, harsh storage and use conditions, and high initiator costs, and avoid high costs. And the problem of harsh use conditions, high shear mechanical strength, and the effect of solving high initiating temperature
CN102718907AActive Publication Date: 2012-10-10泰兴梅兰新材料有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
泰兴梅兰新材料有限公司
Publication Date
2012-10-10
Patent Text Reader

Abstract

The invention relates to a method for preparing ethylene-tetrafluoroethylene copolymer resin by utilizing an inorganic oxidation-reduction system, which solves the technical problems of high initiation temperature of inorganic peroxides and adverse influence on alternating structures, and belongs to the technical field of fluoroplastics. The method is characterized in that an independent gas-mixing tank and a pressurizing system of the gas-mixing tank are arranged, and the gas-mixing tank and a reaction kettle are connected through a check valve, so that gas can only flow from the mixing groove to the reaction kettle in a unidirectional manner; during polymerization reaction, the temperature is reduced to 10 DEG C and is kept constant, the following monomer is added and supplied in the form of mixed gas, and constant pressure is kept in the kettle; and the polymerization reaction adopts an ammonium persulfate-ferrisulphas inorganic redox initiation system. The method has the beneficial effects that the initiation temperature of the inorganic peroxides is lowered, the prepared copolymer resin is in an alternating copolymer structure, radiation-resisting and mechanical performances are improved to a great degree while the good performance of PTFE (Polytetrafluoroethylene) is kept, and the tensile strength can reach 50MPa which is approximately twice as that of the PTFE.
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Description

technical field

[0001] The invention belongs to the technical field of fluorine-containing plastics and preparation methods thereof, and relates to a preparation method of ethylene-tetrafluoroethylene copolymer resin, in particular to a method for preparing ethylene-tetrafluoroethylene copolymer resin initiated by an inorganic redox system. Background technique

[0002] Ethylene-tetrafluoroethylene (ETFE) copolymer resin is a crystalline high polymer with a melting point of 256-280°C. It is self-extinguishing when burned. It is the strongest fluoroplastic with high shear mechanical strength and low-temperature impact resistance. , is the best among the existing fluoroplastics, while maintaining the good heat resistance, chemical resistance and electrical insulation properties of polytetrafluoroethylene (PTFE), radiation resistance and mechanical properties have been greatly improved. The tensile strength can reach 50MPa, nearly twice that of PTFE. The operating temperature ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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