| abstract |
A process for polymerizing 1-butene, optionally with up to 30% by mol of ethylene, propylene or an alpha olefin of formula CH 2 ═CHT wherein T is a C 3 –C 10 alkyl group, in the presence of a catalyst system obtainable by contacting a metallocene compound having C 1 symmetry with an alumoxane and/or a compound capable of forming an alkyl metallocene cation. |