Patent ID: 8501892

Claim:
A copolymer prepared by a process comprising: a) polymerizing propylene and ethylene comonomers in a solution process at a reaction temperature at or above 60° C., with a polymerization catalyst complex comprising: i) an organometallic Group 4 transition metal compound; and ii) an activating cocatalyst, wherein said catalyst complex is capable of producing stereospecific polypropylene; and b) recovering the propylene copolymer, wherein the copolymer comprises units derived from propylene in an amount greater than or equal to 75 weight percent, and units derived from ethylene in an amount of from 5 to 25 weight percent, and wherein the copolymer has (i) a melting point of from greater than 35° C. to less than 110° C., (ii) a weight average molecular weight of: Mw>6.10* P*e (3370/T) wherein: Mw=the weight average molecular weight T=the polymerization reaction temperature in degrees Kelvin P=the steady state propylene concentration in the polymerization reaction zone in moles per liter, and (iii) an elongation of greater than 1000%.