Organic compounds -- part of the class 532-570 series – Organic compounds – Heavy metal containing
Reexamination Certificate
2005-01-24
2008-11-18
Lu, Caixia (Department: 1796)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heavy metal containing
C556S013000, C556S053000
Reexamination Certificate
active
07453005
ABSTRACT:
A transition metal compound useful as a component of a catalyst for olefin polymerization and a highly active polymerization catalyst capable of producing a high molecular weight olefin polymer. The catalyst for olefin polymerization contains a transition metal compound represented by formula (1)wherein M is a metal element of the groups 3 to 10 of the Periodic Table or a lanthanoid; X represents a ligand having a sigma bond for binding to M, and when X is plural, the Xs may be the same or different; Y represents a Lewis base, and when Y is plural, the Ys may be the same or different; A1and A2represent crosslinking groups and at least one thereof has a boron or phosphorous atom as a crosslinking atom; q is an integer of 1 to 5 and equals [(the valance of M)−2]; r is an integer of 0 to 3; and Q1and Q2have a specific structure, and Q1and Q2may be different or the same.
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Kashiwamura Takashi
Okamoto Takuji
Idemitsu Kosan Co. Ltd.
Lu Caixia
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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