METHOD OF PREPARING POLYTETRAFLUOROETHYLENE

METHOD OF PREPARING POLYTETRAFLUOROETHYLENE

FIELD: chemical industry. SUBSTANCE: described is method of preparing polytetrafluoroethylene comprising links of perfluoroalkylvinyl ether having 1-4 carbon atoms in perfluoroalkyl chain by suspension polymerization of monomers in aqueous medium at temperature lower than 60 C in the presence of aci...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: GERNOT LER, BERND FELIKS, KLAUS KHINTTSER
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:FIELD: chemical industry. SUBSTANCE: described is method of preparing polytetrafluoroethylene comprising links of perfluoroalkylvinyl ether having 1-4 carbon atoms in perfluoroalkyl chain by suspension polymerization of monomers in aqueous medium at temperature lower than 60 C in the presence of acid salt initiator comprising highly oxidized manganese. Initiator includes salt of permanganic acid, manganic or manganous acid, and the resulting polytetrafluoroethylene comprises links of perfluoroalkylvinyl ether in amount of 0.02 to 0.25 wt %. EFFECT: simplified process and high-quality polytetrafluoroethylene having improved characteristics. 5 cl, 2 tbl