Process for preparing fluoropolymer
AssigneeDaikin Industries, Ltd.
InventorsTomohisa Noda, Satoshi Komatsu
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Abstract
A process for preparing a fluoropolymer by the batchwise polymerization of a monomer mixture containing tetrafluoroethylene, in which, after the initiation of a reaction, the monomers are reacted under conditions such that the monomer mixture is supplemented to a polymerization system in an amount more than the amount of the monomers consumed and simultaneously the excessive unreacted monomers are discharged from the polymerization system to maintain the monomer composition in the polymerization system substantially the same as that of the composition of the monomer mixture initially charged, and the monomer mixture supplemented to the polymerization system contains a compound suppressing the autoexplosion of the monomers.
Claims11
A process for preparing a fluoropolymer comprising:
- providing an initial monomer mixture containing a tetrafluoroethylene monomer and optionally at least one comonomer selected from the group consisting of hexafluoropropylene, vinylidene fluoride, trifluorochloroethylene, ethylene and perfluoroalkyl vinyl ethers;
- initiating a batchwise polymerization of the monomer mixture in a polymerization system;
- supplementing said monomer mixture during said polymerization with added monomer mixture containing a fluorine-containing compound to suppress autoexplosion of the monomer mixture, wherein said monomer mixture is added in an amount greater than the amount of the monomers consumed and simultaneously removing excess unreacted monomers from the polymerization system to maintain a monomer composition in the polymerization system substantially the same as that of the composition of the monomer mixture initially charged.
Dependencies are inferred from the claim text.