申请人:Targor GmbH
公开号:US05770753A1
公开(公告)日:1998-06-23
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 aluminoxane or a supported aluminoxane, and a metallocene of the formula I ##STR1## in which, in the preferred form, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are halogen or alkyl, R.sup.3 is alkyl, R.sup.4 to R.sup.12 are alkyl or hydrogen and R.sup.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.degree. and 80.degree. 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。对于烯烃的聚合或共聚合而言,一种非常有效的催化剂体系包括一个协同催化剂,优选为铝氧烷或支持的铝氧烷,以及一个式子I的金属茂配合物:##STR1## 其中,在优选形式中,M.sup.1是Zr或Hf,R.sup.1和R.sup.2是卤素或烷基,R.sup.3是烷基,R.sup.4到R.sup.12是烷基或氢,而R.sup.13是(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,产生非常高分子量的聚合物,在非手性单体的情况下产生非常高分子量、非常高立体选择性和非常高熔点的聚合物,在工业上特别感兴趣的50°C至80°C温度范围内具有高催化活性。此外,通过支持的催化剂体系可以避免反应器沉积物的产生。