Patent ID: 8106127

Claim:
An in-reactor polymer blend comprising (a) a propylene-containing first polymer; and (b) an ethylene-containing second polymer such that the polymer blend comprises between about 50 wt % and about 80 wt % units derived from ethylene and between about 50 wt % and about 20 wt % units derived from propylene and is substantially free of dienes, with the content of ethylene in the second polymer found in the form of ethylene-ethylene-ethylene triads being at least 40% and with the in-reactor blend containing at least 0.1 branches having 8 or more carbon atoms per 10,000 carbons of the in-reactor blend, wherein the blend has the following properties: (a) at least two peaks when subjected to Differential Scanning Calorimetry corresponding to a first melting point of at least 150° C. and a second melting point of at least 40° C. such that the difference between the first and second melting temperatures is at least 20° C.; (b) a strain hardening index of at least 1.8; and (c) a shear thinning slope for the log(dynamic viscosity) versus log(frequency) curve of less than −0.2.