Patent ID: 8604145

Claim:
A propylene/ethylene copolymer having a Mw from 50,000 to 150,000, a Mw/Mn from 2.0 to 10, a density from 0.860 to 0.8775 g/cc, an ethylene content from 5 to 15 weight percent, an isotacticity (percent mm) of at least 90, a Tc between 50°C. and 58.7°C. and a B-value from 1.03 to 1.09 wherein the copolymer is made by the process comprising: copolymerizing propylene and ethylene at a temperature from 100 to 130° C., a pressure from 100 kPa to 10 MPa, and a propylene/hydrogen flow ratio (g propylene/hr:g H 2 /hr) from 5000 to 50,000 in the presence of a a metal complex corresponding to the formula: wherein, X is an anionic ligand group; and covalent bonds are represented by lines and coordination interactions are represented by arrows.