Patent ID: 7977444
Filing Date: 2011-07-12
Classification: C08F,Y10S

Abstract:
1. A process for preparing a polymer containing derived units of 1-hexene or 1-octene and from 19 to 59% by mol. of derived units of 1-butene, the process comprising contacting under polymerization conditions 1-hexene or 1-octene and 1-butene in the presence of a catalyst system obtained by contacting: a) a metallocene compound of formula (I): wherein M is an atom of a transition metal selected from those belonging to group 3, 4, 5, 6 or to the lanthanide or actinide groups in the Periodic Table of the Elements; p is an integer from 0 to 3, being equal to the formal oxidation state of the metal M minus 2; X, same or different, is a hydrogen atom, a halogen atom, or a R, OR, OSO L is a divalent C R T, equal to or different from each other, is a moiety of formula (IIb): wherein the atom marked with the symbol * bonds the atom marked with the same symbol in the compound of formula (I); R wherein R R (b) an alumoxane or a compound that forms an alkyl metallocene cation.