Patent ID: 8138269
Filing Date: 2012-03-20
Classification: C08F,C08L,Y02P

Abstract:
1. A blend of isotactic polypropylene and ethylene-propylene copolymer comprising: between 1 and 50 wt % of isotactic polypropylene with a weight average molecular weight (Mw) of at least 35 kg/mol, and between 50 and 99 wt % of ethylene-propylene copolymer including between 10 wt % and 20 wt % randomly distributed ethylene with a melt flow rate (as measured by ASTM D-1238, Condition L, 2.16 kg and 230° C.) of between 0.5 and 20,000 g/10 min, wherein the copolymer is polymerized by a bulk homogeneous polymerization process, and wherein the total regio defects in the continuous propylene segments of the copolymer is between 40 and 150% greater than a copolymer of equivalent melt flow rate and wt % ethylene polymerized by a solution polymerization process, wherein the total regio defects in the continuous propylene segments of the copolymer is greater than 0.50 mol %.