Patent ID: 8058371

Claim:
A continuous process for polymerizing propylene, comprising: (a) feeding about 40 wt % to about 80 wt % propylene monomer, based on total weight of propylene monomer and diluent, and about 20 wt % to about 60 wt % diluent, based on total weight of propylene monomer and diluent, into a reactor; (b) polymerizing the propylene monomer in the presence of a metallocene catalyst and an activator within the reactor at a temperature of about 80Â° C. or more and a pressure of about 13 MPa or more to produce a polymer product in a homogenous system, wherein about 20 wt % to about 76 wt % propylene monomer, based on total weight of the propylene monomer, diluent, and polymer product, is present at the reactor exit at steady state conditions and the conversion of the propylene monomer to polymer product is about 5 wt % to about 45 wt % of the propylene monomer; and (c) obtaining propylene polymer comprising from 0 to 30 wt % of comonomer, said propylene polymer having a melting temperature of about 120Â° C. or more; wherein the polymerization temperature is above the cloud point of the single-phase polymerization system at the reactor pressure, where the polymerization system is defined to be monomer(s) plus optional comonomer(s) plus polymer product plus solvent(s)/diluent(s) plus optional scavenger(s), provided that when the comonomer is ethylene, the ethylene is present at less than 10 wt %.