Thermoplastic polymer blends of isotactic polypropylene and alpha-olefin/propylene copolymers

A propylene polymer comprising from about 84 to about 95 wt % propylene, the remainder comprising ethylene and/or a C4+ α-olefin, the polymer having a heat of fusion <75 J/g, a MWD of from about 2 to about 3.2, a crystallinity of from about 2 to about 65%, the polymer having a Mooney Viscosity (ML 1+4@125° C.) ≦ about 38.4.

The polymer according to claim 33 having a heat of fusion ≦40 J/g.

A propylene polymer comprising from about 84 to about 95 wt % propylene, the polymer having a heat of fusion less than about 60 J/g, a crystallinity of from about 2 to about 65%, the polymer having a Mooney Viscosity (ML 1+4@125° C.) ≦ about 38.4.

A propylene ethylene polymer comprising from about 84 to about 95 wt % propylene, the polymer having a heat of fusion ≦75 J/g, a crystallinity of from about 2 to about 20%, the polymer having a Mooney Viscosity (ML 1+4@125° C.) ≦ about 38.4.

A propylene polymer comprising from about 84 to about 95 wt % propylene, the remainder comprising ethylene and/or a C4+ alpha olefin, the polymer having a heat of fusion <60 J/g, a crystallinity of from about 2 to about 20%, a MWD of from about 2.0 to about 3.2, the polymer made in a solution process in the presence of a hafnium containing catalyst composition and in the presence of a catalyst activator comprising boron, fluorine and/or aluminum.

A propylene polymer comprising from about 84 to about 95 wt % propylene, less than about 10 wt % of a diene, the remainder comprising ethylene and/or butene, the polymer having a heat of fusion <60 J/g, a crystallinity of from about 2 to about 20%, a MWD of from about 2.0 to about 3.2, the polymer having a Mooney Viscosity (ML 1+4@125° C.) ≦ about 38.4, wherein the polymer is made in a solution process with a catalyst system comprising hafnium and wherein the catalyst system further comprises an activator comprising boron, fluorine and/or aluminum.