Metallocenes containing aryl-substituted indenyl derivatives as ligands, process for their preparation, and their use as catalysts
申请人:——
公开号:US20010021755A1
公开(公告)日:2001-09-13
Metallocenes containing aryl-substituted indenyl derivatives as ligands, process for their preparation, and their use as catalysts.
A very effective catalyst system for the polymerization or copolymerization of olefins comprises a cocatalyst, preferably an aluninoxane or a supported aluminoxane, and a metallocene of the formula I
1
in which, in the preferred form, M
1
is Zr or Ef, R
1
and R
2
are halogen or alkyl, R
3
is alkyl, R
4
to R
12
are alkyl or hydrogen and R
13
is a (substituted) alkylene or heteroatom bridge.
The metallocenes, in particular the zirconocenes, produce polymers of very high molecular weight, in the case of prochiral monomers polymers of very high molecular weight, very high stereotacticity and very high melting point, at high catalyst activities in the industrially particularly interesting temperature range between 50 and 80° C. In addition, reactor deposits are avoided by means of supported catalyst systems.
含有芳基取代的茚基衍生物作为配体的金属茂配合物,其制备方法,以及它们作为催化剂的用途。一种非常有效的催化剂体系,用于烯烃的聚合或共聚合,包括一个助催化剂,优选为铝烷氧化物或支撑铝烷氧化物,以及一个式I1的金属茂化合物,在优选形式中,M1为锆或钿,R1和R2为卤素或烷基,R3为烷基,R4到R12为烷基或氢,R13为(取代的)烷基或杂原子桥。这些金属茂配合物,特别是锆茂配合物,以高催化活性在工业上特别感兴趣的温度范围50至80°C之间产生非常高分子量的聚合物,对于非手性单体而言,产生非常高分子量、非常高立体选择性和非常高熔点的聚合物。此外,支撑的催化剂系统可以避免反应器沉积物的产生。