Patent ID: 8835587

Claim:
A copolymer composition comprising units derived from propylene and ethylene, where the copolymer comprises from about 0.1 to about 20 wt % units derived from ethylene, and: i. the density of the copolymer composition is less than about 0.970 g/cc, ii. the heat of fusion of the copolymer composition is less than about 75 J/g, iii. the melting point of the composition satisfies the relation T m >−6.2*e+125, where e is the ethylene content of the composition in wt % and Tm is the melting point in degrees Celsius, iv. the copolymer is prepared using one or more metallocene catalysts, and v. the copolymer composition has a T 75 −T 25 value of less than 20, where T 25 is the temperature in degrees Celsius at which 25% of the eluted polymer is obtained and T 75 is the temperature in degrees Celsius at which 75% of the eluted polymer is obtained via temperature rising elution fractionation (TREF).