Tetrafluoroethylene/hexafluoropropylene copolymer having improved extrudability

A tetrafluoroethylene/hexafluoropropylene copolymer comprising 5 to 20% by weight of hexafluoropropylene, the specific melt viscosity at 380 DEG C of which is from 1 x 10 to 60x10 poise,… (a) the melt flow ratio being at least 3.5, and… (b) the zero strength time (ZST, second) at 380 DEG C satisfyin...

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Bibliographische Detailangaben
Hauptverfasser:	ADACHI, TOKIO, NAKAGAWA, SHINICHI, KAWACHI, SHOJI, ASANO, KOHZOH, SAKATA, SHINSUKE
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS CABLES CHEMISTRY COMPOSITIONS BASED THEREON CONDUCTORS ELECTRICITY INSULATORS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	A tetrafluoroethylene/hexafluoropropylene copolymer comprising 5 to 20% by weight of hexafluoropropylene, the specific melt viscosity at 380 DEG C of which is from 1 x 10 to 60x10 poise,… (a) the melt flow ratio being at least 3.5, and… (b) the zero strength time (ZST, second) at 380 DEG C satisfying the following equation:… ZST >/= 1_3X + 17x + 107… wherein x is (specific melt viscosity) x 10 having an improved extrudability, particularly an improved extrusion speed.