Patent ID: 8546499
Filing Date: 2013-10-01
Classification: C08F,C08L

Abstract:
1. Ziegler-Natta catalyzed linear low density polyethylene which satisfies the following conditions: (a) a density, according to ISO 1183, of from 900 to 925 kg/m (b) a C (c) a weight average molecular weight Mw, determined by gel permeation chromatography, of at least 200 000 g/mol, (d) wherein the linear low density polyethylene comprises, by Crystallisation Analysis Fractionation (CRYSTAF) an amorphous fraction soluble at a temperature below 30° C. of at most 10 wt % and a fraction crystallising between 60 to 75° C. of at least 35 wt % and (e) by temperature rising elution fractionation (TREF) analysis, at least 70 wt % of a crystallising polymer component having an elution temperature range from 60° C. to 94° C. and less than 10 wt % of a crystallising polymer component having an elution temperature range from 30° C. to 60° and, (f) by gel permeation chromatography coupled with Fourier transform infrared spectroscopy instruments (GPC-FTIR), a substantially constant distribution of short chain branches per 1000 total carbon atoms across the molecular weight distribution (MWD).