Plasticized hetero-phase polyolefin blends
This invention relates to hetero-phase polyolefin compositions comprising: a) 30 to 99.7 wt % of a polypropylene-based TPO comprising at least 50 wt % propylene and at least 10 wt % ethylene, and b) 0.1 to 20 wt % of one or more non-functionalized plasticizer, and c) 0.2 to 50 wt % of one or more filler; based upon the weight of the composition, and having: i) an MFR of 5 dg/min or more, and ii) a flexural modulus of 500 MPa or more, and iii) a notched Charpy impact strength at −30° C. of 1 kJ/m2 or more or a notched Izod impact strength at −18° C. of 50 J/m or more.These compositions are especially useful in applications such as automotive parts that demand both high stiffness and high impact toughness, as well as good processibility during fabrication.
ExxonMobil Chemical Patents Inc.
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Jared M. Bruce R. Jeffrey Bryan R.
Hill Lundmark Valentage Chapman