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METHOD FOR PRODUCING MODIFIED POLYTETRAFLUOROETHYLENE, METHOD FOR PRODUCING MODIFIED POLYTETRAFLUOROETHYLENE POWDER, AND METHOD FOR PRODUCING STRETCHED POROUS BODY
METHOD FOR PRODUCING MODIFIED POLYTETRAFLUOROETHYLENE, METHOD FOR PRODUCING MODIFIED POLYTETRAFLUOROETHYLENE POWDER, AND METHOD FOR PRODUCING STRETCHED POROUS BODY
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机译:制备改性聚四氟乙烯,制备改性聚四氟乙烯粉末的方法,以及生产拉伸多孔体的方法
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摘要
To provide a method for producing modified polytetrafluoroethylene, in which formation of a fluorinated oligomer as a by-product is little. A method for producing modified polytetrafluoroethylene which contains substantially no C6-34 fluorinated oligomer containing hydrophilic functional groups and which contains substantially no fluorinated surfactant, the method comprising conducting copolymerization of tetrafluoroethylene and a monomer having a polar group, in a liquid dispersion 1 comprising a polymer containing units derived from a non-fluorinated monomer and an aqueous medium, or in a solution 2 obtainable by mixing at least one member selected from the group consisting of a polyalkylene oxide compound and a hydrocarbon-containing surfactant, with an oxidizing agent, in an aqueous medium, under such a condition that the amount of the monomer having a polar group to be used, is at most 0.150 mass% to the whole amount of tetrafluoroethylene, to obtain modified polytetrafluoroethylene.
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