Daikin Kogyo Co., Ltd.

Kohzoh Asano

Tsuneo Nakagawa

Shinichi Nakagawa

Toshihiko Amano

Shoji Kawachi

Kiyohiko Ihara

Mitsugu Omori

Sadaatsu Yamaguchi

Sadatsu Yamaguchi

Tokio Adachi

Shinsuke Sakata

Mixture of tetrafluoroethylene/hexafluoropropylene (TFE/HFP) copolymers comprising 5 to 20% by weight of hexafluoropropylene, the specific melt viscosity at 380.degree. C. of which is from 1.times.10.sup.4 to 60.times.10.sup.4 poise,

Tetrafluoroethylene/hexafluoropropylene copolymer having improved

A fluorine-containing copolymer comprising monomeric units of

Fluorine-containing copolymer

A process for preparing a tetrafluoroethylene/fluoro(alkyl vinyl ether) copolymer comprising polymerizing tetrafluoroethylene and fluoro(alkyl vinyl ether) in an aqueous suspension system which comprises a mixed medium of water and a fluorohydrocarbon or a chlorofluorohydrocarbon in a volume ratio of from 1:1 to 10:1 at a temperature of from 0.degree. to 25.degree. C. in the presence of a polymerization initiator of the formula:

Process for preparing tetrafluoroethylene/fluoro(alkyl vinyl ether)

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Kohzoh Asano