MODIFICATION OF POLYOLEFINS

The invention provides a process for increasing the melt flow index of a polyolefin, the process comprising using a melt mixing device to melt mix the polyolefin in contact with oxygen and a transition metal catalyst having a redox potential ranging from 0 to 2 volts, wherein oxygen is introduced to...

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Bibliographische Detailangaben
Hauptverfasser:	O'SHEA, MICHAEL SHANE, MOAD, GRAEME, PEETERS, GARY, POSTMA, ALMAR
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON 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:	The invention provides a process for increasing the melt flow index of a polyolefin, the process comprising using a melt mixing device to melt mix the polyolefin in contact with oxygen and a transition metal catalyst having a redox potential ranging from 0 to 2 volts, wherein oxygen is introduced to the melt mixing device, and wherein the transition metal catalyst in contact with the polyolefin forms at least part of a component of the melt mixing device. L'invention porte sur un procédé pour augmenter l'indice de fusion d'une polyoléfine. Ce procédé comprend l'utilisation d'un dispositif de mélange à l'état fondu pour mélanger à l'état fondu la polyoléfine en contact avec l'oxygène, et un catalyseur de métal de transition ayant un potentiel d'oxydoréduction se situant entre 0 et 2 volts. De l'oxygène est introduit dans le dispositif de mélange à l'état fondu. Le catalyseur de métal de transition en contact avec la polyoléfine forme au moins une partie d'un composant du dispositif de mélange à l'état fondu.