| abstract |
Improved thermoplastic polymer blend compositions comprising annisotactic polypropylene component and an alpha-olefin and propylene copolymerncomponent, said copolymer comprising crystallizable alpha-olefin sequences. In anpreferred embodiment, improved thermoplastic polymer blends are providedncomprising from about 35% to about 85% isotactic polypropylene and from aboutn30% to about 70% of an ethylene and propylene copolymer, wherein saidncopolymer comprises isotactically crystallizable propylene sequences and isnpredominately propylene. The resultant blends manifest unexpected compatibilityncharacteristics, increased tensile strength, and improved process characteristics,ne.g., a single melting point. |