Patent ID: 8101695
Filing Date: 2012-01-24
Classification: C08F,Y10S

Abstract:
1. A process for obtaining a propylene-based terpolymer comprising contacting under polymerization conditions, propylene, 1-butene and an alpha olefin of formula CH 2 ═CHZ wherein Z is a C 4 -C 20 alkyl radical, in the presence of a catalyst system obtained by contacting: a) at least one metallocene compound having the formula (II) or (III): wherein M is a transition metal belonging to group 4, 5 or to the lanthanide or actinide groups of the Periodic Table of the Elements; the substituents X, equal to or different from each other, are monoanionic sigma ligands selected from the group consisting of hydrogen, halogen, R p is an integer equal to the oxidation state of the metal M minus 2; L is a divalent bridging group selected from C wherein in the compound of formula (II): R R T wherein the atom marked with the symbol * bonds the atom marked with the same symbol in the compound of formula (II); R R wherein in the compound of formula (III): R R b) an alumoxane or a compound that forms an alkyl metallocene cation; and optionally c) an organo aluminum compound, wherein the propylene-based terpolymer comprises: