Patent ID: 8816027
Filing Date: 2014-08-26
Classification: B01J,C08F,Y10S

Abstract:
1. A process for making a vinyl terminated propylene polymer, wherein the process comprises: contacting propylene, under polymerization conditions, with a catalyst system comprising an activator and at least one metallocene compound represented by the formula (I): where: M is hafnium or zirconium; each X is, independently, selected from the group consisting of hydrocarbyl radicals having from 1 to 20 carbon atoms, hydrides, amides, alkoxides, sulfides, phosphides, halides, dienes, amines, phosphines, ethers, and a combination thereof, wherein two X's optionally form a part of a fused ring or a ring system; each R each R each R each R T is a bridging group represented by R′ further provided that any of adjacent R obtaining a propylene polymer having at least 50% allyl chain ends (relative to total unsaturations) and a Tg of 0° C. or less, wherein the activator comprises an alumoxane.