Patent ID: 7879959
Filing Date: 2011-02-01
Classification: C08F

Abstract:
1. A process which comprises polymerizing ethylene in the presence of hydrogen and a catalyst system comprising a catalyst component comprising Ti, Mg, halogen, and OEt groups, wherein the catalyst component has an OEt/Ti molar ratio greater than 0.5, a Mg/Ti molar ratio of less than 8, an amount of titanium, with respect to the total weight of said catalyst component, greater than 5% by weight, and shows in the pattern of the SS-NMR recorded under the conditions set forth below one or more signals (A) having a maximum in the region 60-75 (ppm) and one or more signals (B) having a maximum in the region 78-108 such that the ratio I A /I B , in which I A is the integral of the signals having the maximum in the region between 60 and 75 ppm and I B is the integral of the signals having the maximum in the region between 78 and 108 ppm, is higher than 0.8.