| abstract |
A polypropylene composition comprising 20 to 95% by weight of a stereoregular polypropylene characterized by the specified physical properties determined from 13C NMR spectra and 5 to 80% by weight of an alpha -olefin copolymer comprising 10 to 90% by weight of an alpha -olefin and 10 to 90% by weight of at least one of other alpha -olefins. The polypropylene composition demonstrates good balance of rigidity and impact resistance, high heat resistance and high toughness, when used as molding materials. |