Metallocene compounds, process for their preparation thereof, and their use in catalysts for the polymerization of olefins
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United States of America Patent
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Feb 11, 2003
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app pub date -
Jan 11, 2000
filing date -
Jan 23, 1995
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Abstract
A class of metallocene compounds having two cyclopentadienyl rings bridged by an alkylidene group is disclosed. These metallocene compounds can be suitably used as catalyst components for the polymerization of olefins. In particular, by polymerising propylene in the presence of a catalyst based on these metallocene compounds, polymers having very high isotactic indexes, high molecular weights and narrow molecular weight distributions can be obtained in high yields.
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