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.
本发明提供了一种茂
金属化合物,它可以生产出具有高分子量和高立体规整度的烯烃聚合物。该茂
金属化合物具有下式(1):
Q(C
5
H
4-m
R
1
m
)(C
5
H
4-n
R
2
n
)MXY (1)
其中 (C
5
H
4-m
R
1
m
)和(C
5
H
4-n
R
2
n
)各自独立地代表一个
环戊二烯基团;
C
5
H
4-m
和 C
5
H
4-n
各自独立地代表一个
环戊二烯环;
m 代表 1-3 的整数
n 代表 2 或 3 的整数;
R
1
和 R
2
分别独立地作为取代基与 C
5
H
4-m
和 C
5
H
4-n
代表 1-20 个碳原子的烃基、1-20 个碳原子的含
硅烃基或杂芳族基团;
每个 R
1
m
和每个 R
2
n
可以相同,也可以不同;一对 R
2
中的一对 R
2
n
中的一对 R 2 '相互键合,形成至少一个环;
Q 代表用于交联的二价基团(C
5
H
4-m
R
1
m
)和(C
5
H
4-n
R
2
n
);
M 代表
钛原子、
锆原子或
铪原子;以及
X 和 Y 相同或不同,各自为氢原子、卤素原子或烃基。