METHOD FOR PRODUCING ULTRAHIGH MOLECULAR WEIGHT ETHYLENE-alpha-OLEFIN COPOLYMER

PROBLEM TO BE SOLVED: To provide a method for producing an ultrahigh molecular weight ethylene-α-olefin copolymer having a low melting point and excellent balance between transparency and mechanical strength. SOLUTION: The method for producing the ultrahigh molecular weight ethylene-α-olefin copolym...

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Bibliographische Detailangaben
1. Verfasser:	KUMAMOTO SHINICHI
Format:	Patent
Sprache:	eng
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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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for producing an ultrahigh molecular weight ethylene-α-olefin copolymer having a low melting point and excellent balance between transparency and mechanical strength. SOLUTION: The method for producing the ultrahigh molecular weight ethylene-α-olefin copolymer satisfying the following essential conditions (i) and (ii) involves copolymerizing ethylene and an α-olefin in the presence of a polymerization catalyst obtained by bringing the following component (A) into contact with the component (B): component (A): a solid catalytic component containing a titanium atom, a magnesium atom, a halogen atom and an ester compound, and having ≤80 m2/g specific surface area by a BET method; component (B): an organoaluminum compound; (i) having 5-30 dl/g intrinsic viscosity [η]; and (ii) having 110-130°C melting point measured by differential scanning calorimetry. COPYRIGHT: (C)2007,JPO&INPIT