position prepared by polymerization in at least two stages comprising(a) about 10% to about 50% of a propylene homopolymer having an isotactic index greater than 80, or a propylene copolymer selected from the group consisting of (i) propylene and ethylene, (ii) propylene, ethylene and a CH2 ???CHR alpha-olefin, where R is a 2-8 carbon straight or branched alkyl, and (iii) propylene and an alpha-ol