Metallocene compound, olefin polymerization catalyst containing the compound, and method for producing an olefin polymer by use of the catalyst
申请人:Nakano Masato
公开号:US06846943B2
公开(公告)日:2005-01-25
The present invention provides a metallocene compound which produces an olefin polymer having a high molecular weight with a high stereoregularity. The metallocene compound has the following formula (1):
Q(C
5
H
4-m
R
1
m
)(C
5
H
4-n
R
2
n
)MXY (1)
wherein (C
5
H
4-m
R
1
m
) and (C
5
H
4-n
R
2
n
) each independently represent a cyclopentadienyl group;
C
5
H
4-m
and C
5
H
4-n
each independently represent a cyclopentadienyl ring;
m represents an integer of 1-3;
n represents an integer of 2 or 3;
R
1
and R
2
are each independently a substituent bonded respectively to C
5
H
4-m
and C
5
H
4-n
, and represent a hydrocarbon group of 1-20 carbon atoms, a silicon-containing hydrocarbon group of 1-20 carbon atoms or a heteroaromatic group;
each R
1
m
and each R
2
n
may be the same or different;
one pair of R
2
's in the R
2
n
are bonded to each other to form at least one ring;
Q represents a divalent group for cross-linking (C
5
H
4-m
R
1
m
) and (C
5
H
4-n
R
2
n
);
M represents a titanium atom, a zirconium atom or a hafnium atom; and
X and Y are the same or different and each a hydrogen atom, a halogen atom or a hydrocarbon group.