AN EXTRUSION PROCESS FOR PREPARING A LOW MOLECULAR WEIGHT POLYTETRAFLUOROETHYLENE MICROPOWDER

The present invention relates to an extrusion process for preparing a low molecular weight PTFE micropowder, comprising the steps of: introducing a PTFE composition into a extruder; applying heat treatment to the extruder; extruding the PTFE composition in an extruder to reduce molecular weight thro...

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Bibliographische Detailangaben
Hauptverfasser:	SONI, Navin, CHAUHAN, Rajeev, BHAN, Sanjay, PAWAR, Amol, KAPOOR, Deepak
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G 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 THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	The present invention relates to an extrusion process for preparing a low molecular weight PTFE micropowder, comprising the steps of: introducing a PTFE composition into a extruder; applying heat treatment to the extruder; extruding the PTFE composition in an extruder to reduce molecular weight through heat and shear force; cooling and pelletizing in a pelletizer to form granules of PTFE; and reducing the particle size of PTFE granules by milling method to form low molecular weight PTFE micropowder. The present invention also relates to an extrusion process for degradation of high molecular weight PTFE to produce low molecular weight Polytetrafluoroethylene micropowder.