Olefin polymerization catalysts, transition metal compounds, processes for olefin polymerization, and .alpha.-olefin/conjugated diene copolymers
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United States of America Patent
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Oct 30, 2001
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app pub date -
Apr 24, 1998
filing date -
Apr 25, 1997
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Abstract
The invention provides olefin polymerization catalyst exhibiting excellent polymerization activities, a process for olefin polymerization using the catalyst, a novel transition metal compound useful for the catalyst, and an .alpha.-olefin/conjugated diene copolymer having specific properties. The olefin polymerization catalyst of the invention comprises (A) a transition metal compound of formula (I) or (II), and (B) an organometallic compound, an oranoaluminum oxy-compound or an ionizing ionic compound. The novel transition metal compound of the invention is a compound of formula (I) wherein M is a transition meal atom of Group 3 or 4 of the periodic table; m is an integer of 1 to 3; R.sup.1 is a hydrocarbon group, etc.; R.sup.2 to R.sup.5 are each H, a halogen, a hydrocarbon group, etc.; R.sup.6 is a halogen, a hydrocarbon group, etc.; n is a number satisfying a valence of M; and X is a halogen, a hydrocarbon group, etc. ##STR1##
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