Process to produce strain hardened polypropylene

Process to produce strain hardened polypropylene

A process comprising combining a polymerization catalyst with propylene at a polymerization temperature to produce polypropylene granules having an MFR1, wherein the temperature of the polypropylene granules is maintained at least at the polymerization temperature; mixing the polypropylene granules...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Oshinski, Alan J, Volmer, Roger P, Schmitt, Sasha P, Allen, Jr., Edward F, Pehlert, George J
Format: Patent
Sprache:eng
Schlagworte:
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
GENERAL PROCESSES OF COMPOUNDING
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
WORKING-UP
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Beschreibung
Zusammenfassung:A process comprising combining a polymerization catalyst with propylene at a polymerization temperature to produce polypropylene granules having an MFR1, wherein the temperature of the polypropylene granules is maintained at least at the polymerization temperature; mixing the polypropylene granules with an organic peroxide at a temperature of at least the polymerization temperature for a residence time of at least 40 seconds at a temperature below the melting point temperature of the polypropylene granules to form a polypropylene product having an MFR2, wherein MFR1 is greater than MFR2.