申请人:Hoechst Aktiengesellschaft
公开号:US05329033A1
公开(公告)日:1994-07-12
A very effective catalyst system for olefin polymerization consists of a cocatalyst, preferably an aluminoxane, and a metallocene of the formula (I) ##STR1## in which, preferably, M.sup.1 is Zr, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 to R.sup.6 are alkyl, --(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n -- is a chain having one or more members, in which R.sup.7 can also be a (substituted) hetero atom, and m+n is zero or 1. The catalyst system leads to polymers of variable molecular weight and stereotacticity, depending on the substituents R.sup.3 to R.sup.6 chosen, at polymerization temperatures which are relevant in industry.
一种用于烯烃聚合的高效催化剂体系由一个协同催化剂,最好是铝氧烷,和一个具有公式(I)的金属茂的组合而成:##STR1## 其中,最好的情况是M.sup.1是Zr,R.sup.1和R.sup.2是烷基或卤素,R.sup.3到R.sup.6是烷基,--(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n --是一个具有一个或多个成员的链,其中R.sup.7也可以是一个(取代的)杂原子,m+n为零或1。该催化剂体系在工业上的聚合温度下,根据所选择的R.sup.3到R.sup.6取代基,可以导致具有可变分子量和立构性的聚合物。