Catalysts for polymerization of alpha-olefins, process for producing alpha-olefin polymers, novel transition metal compounds and catalyst components for polymerization of alpha-olefin
申请人:Mitsubishi Chemical Corporation.
公开号:US20020045535A1
公开(公告)日:2002-04-18
Catalysts for polymerization of &agr;-olefin, composed of a transition metal compound, an inorganic silicate or an ion exchangeable layer compound other than silicate, and optionally an organoaluminum compound, are described. The transition metal compound is represented by formula (I):
1
where A
1
and A
2
are each independently a conjugated 5-membered ring ligand provided that A
1
and A
2
may be the same or different in a molecule, and at least one of A
1
and A
2
forms a 7- to 10-membered condensed ring including two adjacent carbon atoms of the conjugated 5-membered ring, which condensed ring is formed by joining two adjacent substitutent groups on the conjugated 5-membered ring; Q is a bridging group of the two conjugated 5-membered rings of A
1
and A
2
at optional positions of the 5-membered rings; M is a metal atom selected from elements of Group 4-6 of the Periodic Table; and X and Z are each independently a hydrogen atom, a halogen atom, a hydrocarbon group, and amino group, a halogenated hydrocarbon group, an oxygen-containing hydrocarbon group, a nitrogen-containing hydrocarbon group, a phosphorus-containing hydrocarbon group or a silicon-containing hydrocarbon group.
本文描述了用于α-烯烃聚合的催化剂,由过渡金属化合物、无机硅酸盐或除硅酸盐以外的可离子交换层化合物以及可选的有机铝化合物组成。过渡金属化合物由式(I)表示:其中A1和A2分别是共轭的5元环配体,前提是在分子中A1和A2可以相同或不同,并且A1和A2中至少有一个形成由连接共轭的5元环上的两个相邻碳原子而形成的7-10元环。Q是A1和A2的两个共轭的5元环的桥接基团,位于5元环的可选位置;M是从周期表第4-6族元素中选择的金属原子;X和Z分别是氢原子、卤素原子、碳氢基团、氨基、卤代碳氢基团、含氧碳氢基团、含氮碳氢基团、含磷碳氢基团或含硅碳氢基团。