Patent ID: 6152543
Filing Date: 2000-11-28
Classification: C08F,Y10S

Abstract:
A catalyst system for the polymerization of C.sub.2 -C.sub.10 -alk-1-enes comprising, as active ingredients, a complex compound of a metal and an oligomeric alumoxane compound and obtained bya) mixing a complex compound having the formula (I) ##STR3## in which the substituents have the following meaning: R.sup.1 to R.sup.3 and R.sup.5 to R.sup.7 hydrogen, C.sub.1 -C.sub.10 -alkyl, 5-membered to 7-membered cycloalkyl, which may in turn be substituted by C.sub.1 -C.sub.6 -alkyl, C.sub.6 -C.sub.15 -aryl, or C.sub.6 -C.sub.15 -arylalkyl, where, optionally, two adjacent radicals R.sup.1 and R.sup.2, R.sup.2 and R.sup.3, R.sup.5 and R.sup.6 or R.sup.6 and R.sup.7 may together form an unsaturated cyclic group of from 4 to 15 carbon atoms,R.sup.4, R.sup.8 hydrogen, C.sub.1 -C.sub.4 -alkyl,R.sup.9 C.sub.1 -C.sub.8 -alkyl, C.sub.3 -C.sub.10 -cycloalkyl, C.sub.8 -C.sub.10 -arylM titanium, zirconium or hafnium,Y silicon, germanium, tin, sulfur, or carbon,X fluorine, chlorine, bromine, iodine, or C.sub.1 -C.sub.8 -alkyl, andn is 0, 1 or 2,with a solution of the oligomeric alumoxane compound and(b) applying the resulting mixture to finely divided polypropylene having particle sizes ranging from 0.01 mm to 1 mm.