Polyolefin material with enhanced surface durability

摘要

Thermoplastic polyolefin blends with a good stiffness/impact balance, as well as enhanced surface durability, contain semi-crystalline polypropylene resin component, a propylene-based elastomer component, and an optional but preferred styrene-based elastomer component. The propylene-based elastomer (PBE) is characterized as having at least one of a) a plurality of identifying band positions at 998 cm^-1, 974 cm^-1, and 733 cm^-1, as measured by Fourier Transform Infrared Spectroscopy (FTIR); or one or more glass transition temperatures (Tg) from about -15° C. to -35° C., as measured by Differential Scanning Calorimetry. The surface of articles made from such a thermoplastic blend shows increased scratch resistance and a decrease in stress whitening.