Moulding powder of modified polytetrafluoroethylene which is not free flowing

- Non-dusting moulding powder with a bulk density of NOTLESS 450 g/l, which is not free-running, consists of a suspension polymer (I) with tetrafluoroethylene (TFE) units and 0.01-1 wt.% perfluoro(alkyl vinyl) ether units with a 1-4 carbon (C) alkyl group. It is obtained by milling the primary parti...

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Bibliographische Detailangaben
Hauptverfasser:	LOEHR, GERNOT, HINTZER, KLAUS, SULZBACH, REINHARD ALBERT
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	- Non-dusting moulding powder with a bulk density of NOTLESS 450 g/l, which is not free-running, consists of a suspension polymer (I) with tetrafluoroethylene (TFE) units and 0.01-1 wt.% perfluoro(alkyl vinyl) ether units with a 1-4 carbon (C) alkyl group. It is obtained by milling the primary particles to an average diameter d50 of 10-50 mu m and reagglomeration in water to an average agglomerate diameter d50 of 30-100 mu m. Also claimed is a method of producing the powder by milling and reagglomeration.