POLYOLEFINIC COMPOSITION EXIBITING MAXIMUM MOLECULAR WEIGHT IN ITS PORTION OF HIGHEST COMONOMER CONTENT

A polyolefin copolymer composition, which is produced with a catalyst having a metallocene complex in a single reactor by polymerisation of an ~a-olefin with one or more olefin comonomers, has long-chain branches along the polymer backbone and a molecular weight maximum that occurs in the 50 wt.% of...

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Hauptverfasser:	PEIL KEVIN P, HOWARD PHILIP, MADDOX PETER J, WILSON DAVID R, KARJALA TERESA P, VAN VOLKENBURGH WILLIAM R, PARIKH DEEPAK R, MUNRO IAN M, WINTER MARK J, CADY LARRY D, PARTINGTON ROY S, SPENCER LEE, FRYE CHRISTOPHER J, WILLIAMS PETER S
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM 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 CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	A polyolefin copolymer composition, which is produced with a catalyst having a metallocene complex in a single reactor by polymerisation of an ~a-olefin with one or more olefin comonomers, has long-chain branches along the polymer backbone and a molecular weight maximum that occurs in the 50 wt.% of the composition having the highest wt.% content of comonomer. Also claimed are: (1) an organometallic polymerisation catalyst suitable for the continuous gas-phase copolymerisation of 1-hexene and ethylene in a molar ratio of 0.02 or less at 70 deg C and an ethylene pressure of 8 bar to produce a composition of density 0.918 g/cm3 and having long-chain branches and/or a molecular weight maximum as above; (2) a film or other article made from a copolymer as above having a melt strength greater than 4 cN, or a seal strength greater than 1.9 kg, or a hot-tack greater than 0.23 kg, or a dart impact strength greater than 100g; and (3) a blend of 2 or more resins comprising (A) 1-99 wt.% of a copolymer made by the above process and (B) 99-1 wt.% of other resins.