Patent ID: 6844290

Claim:
A catalyst obtained from a) a chromium compound CrX 3 and the at least equimolar amount, based on the chromium compound CrX 3 , of a ligand L or from an existing chromium complex CrX 3 L, in which the groups X are, independently of one another, abstractable counterions and L is a 1,3,5-triazacyclohexane of the formula I where the groups R 1 to R 9 are, independently of one another: hydrogen or organosilicon or substituted or unsubstituted carboorganic groups having from 1 to 30 carbon atoms, where two geminal or vicinal radicals R 1 to R 9 may also be joined to form a five- or six-membered ring, and b) at least one activating additive selected from the group consisting of (i) and (ii) wherein: i) is a combination of an unsubstituted or substituted five-membered aromatic N-heterocycle and at least one aluminum alkyl, wherein some of the alkyl groups of the aluminum alkyl are optionally replaced by halogen and/or alkoxy, and ii) is an alkylalumoxane.