申请人:Hoechst AG
公开号:US05278264A1
公开(公告)日:1994-01-11
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,以及一个具有公式(I)的金属茂化合物:##STR1## 其中,优选M.sup.1为Zr,R.sup.1和R.sup.2为烷基或卤素,R.sup.3至R.sup.6为烷基,--(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n --是一条具有一个或多个成员的链,其中R.sup.7也可以是(取代的)杂原子,m+n为0或1。该催化剂体系可在工业中相关的聚合温度下,产生具有不同分子量和立构性的聚合物,具体取决于所选择的取代基R.sup.3至R.sup.6。