POLYNUCLEAR METALLOCENE CATALYST FOR POLYMERIZING STYRENIC MONOMER AND METHOD FOR SYNTHESIZING THE SAME, AND METHOD FOR SYNTHESIZING STYRENIC POLYMER USING THE SAME

PROBLEM TO BE SOLVED: To produce a highly active polynuclear metallocene catalyst used for the synthesis of a polystyrenic polymer excellent in stereoregularity, having a high melting point, a high molecular weight and a narrow molecular weight distribution, to provide a method for synthesizing the...

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1. Verfasser:	RYU RIRETSU
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Zusammenfassung:	PROBLEM TO BE SOLVED: To produce a highly active polynuclear metallocene catalyst used for the synthesis of a polystyrenic polymer excellent in stereoregularity, having a high melting point, a high molecular weight and a narrow molecular weight distribution, to provide a method for synthesizing the same and a method for synthesizing a styrenic polymer using the polynuclear metallocene catalyst. SOLUTION: The polynuclear metallocene catalyst is represented by structural formula (1), where auxiliary ligands of a transition metal compound are linked together by a reaction with a compound bearing two hydroxyl groups and three or four transition metals are contained in one molecule of the catalyst. Also are provided a method for synthesizing the catalyst and a method for synthesizing a styrenic polymer using the polynuclear metallocene catalyst.