Process for producing fluorination-treated perfluoropolymer
AssigneeAsahi Glass Company, Limited
InventorsNobuyuki Kasahara, Noriaki Miyake
Life of this patent
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Abstract
To provide a process for efficiently producing a perfluoropolymer having unstable terminal groups reduced. A process for producing a fluorination-treated perfluoropolymer, which comprises melting a thermoplastic perfluoropolymer to form strands and contacting the polymer strands with a fluorine gas. For fluorination-treatment of the perfluoropolymer, an apparatus 10 is used, which comprises a melt extruder 11 for melting and extruding the perfluoropolymer, a die 12 for forming the melt extruded polymer into continuous strands 1 and a fluorination tank 13 for contacting the continuous strands 1 with a fluorine gas.
Claims18
A process for producing a fluorination-treated perfluoropolymer with reduced chain terminal unstable functional groups, which comprises melting a thermoplastic perfluoropolymer to form strands and contacting the polymer strands with a gas comprising from 1 to 50 volume % of fluorine gas such that fluorine gas is absorbed and diffused into the polymer strands and is reacted with chain terminal unstable terminal groups throughout the polymer strands, thereby reducing the chain terminal unstable functional groups throughout the polymer strands.
Dependencies are inferred from the claim text.