METHODS FOR CONTROLLING POLYMER PROPERTIES

METHODS FOR CONTROLLING POLYMER PROPERTIES

A method of producing a polyolefin comprising:contacting a reaction mixture and a reduced chromium oxide catalyst in a gas-phase reactor to produce the polyolefin, wherein the reaction mixture comprises ethylene and a comonomer, and wherein the polyolefin is characterized by (i) a modified-Charpy im...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ALEXANDRE, Francois, MATTHEWS, William A, CANN, Kevin J, GOODE, Mark G, KOPP, Barbara J, MURE, Cliff R, MOORHOUSE, John H
Format: Patent
Sprache:eng ; fre ; ger
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:A method of producing a polyolefin comprising:contacting a reaction mixture and a reduced chromium oxide catalyst in a gas-phase reactor to produce the polyolefin, wherein the reaction mixture comprises ethylene and a comonomer, and wherein the polyolefin is characterized by (i) a modified-Charpy impact strength of about 20 kJ/m2 or more and (ii) an equivalent stress cracking resistance of about 50 hours or more determined by notched constant ligament stress.