Patent ID: 8129473

Claim:
A composition comprising a polymer blend of: a) a first random copolymer of propylene and at least one non-propylene C 2 -C 20 α-olefin, said first random copolymer having a propylene content of above 90 up to about 99.5 weight percent, a melting point of above 116° C. to about 145° C. and which constitutes from about 60 weight percent to about 95 weight percent of the composition, and b) a second random copolymer of propylene and at least one non-propylene C 2 -C 20 α-olefin, said second random copolymer having a propylene content of above 85 up to about 97 weight percent, but less than the propylene content of the first random copolymer, a melting point from about 70° C. to no more than 116° C. and which constitutes from about 5 weight percent to about 40 weight percent of the composition, wherein said polymer blend includes a fraction soluble in xylene at 20° C., determined at 20° C. and 5 days settling time, the xylene soluble fraction having a weight average molecular weight of more than 100 kg/mol and an intrinsic viscosity of above about 1.0 dl/g.