| abstract |
Catalyst compositions based uponn a. a Group IVA metal compound of the general formula (Cp) p MeX 4-p wherein Cp represents identical or different cyclopentadienyl groups which may be substituted with one or more hydrocarbyl groups with the understanding that at least one cyclopentadienyl group is substituted with a single optionally substituted aryl group, Me represents a Group IVA metal, X represents one or more substituents attached to the Group IVA metal which substituents are selected from the group consisting of hydrocarbyl groups, hydrocarboxy groups, hydrocarbamide groups, hydrogen and halogen, and p is an integer of from 1 to 4, and b. an aluminoxane, and a process for the polymerisation of one or more alpha-olefins comprising contacting the alpha-olefin(s) with a catalyst composition as described hereinbefore. |