Patent ID: 8026323

Claim:
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 a propylene copolymer containing 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, wherein the copolymer has a melting point of from greater than 35° C. to less than 110° C., and 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.