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    • 9. 发明申请
    • POLYPROPYLENE BASED COMPOSITION WITH IMPROVED PAINTABILITY
    • WO2020048794A1
    • 2020-03-12
    • PCT/EP2019/072561
    • 2019-08-23
    • BOREALIS AG
    • WANG, JingboBERNREITNER, KlausMILEVA, DanielaGRESTENBERGER, GeorgGAHLEITNER, Markus
    • C08L23/12
    • The present invention relates to a polypropylene based composition comprising: (A) from 40.0 to 85.0 wt% of a heterophasic propylene copolymer having a content of xylene cold soluble (XCS) fraction in the range of 15 wt% to 35 wt%, based on the total weight of the heterophasic propylene copolymer; (B) from 5.0 to 15.0 wt% of a random copolymer of propylene with comonomer units selected from ethylene and alpha-olefins having from 4 to 12 carbon atoms which has been polymerized in the presence of a single-site catalyst system and has a melting temperature Tm as measured in differential scanning calorimetry (DSC) of less than 140°C; (C) from 5.0 to 25.0 wt% of an ethylene copolymer with alpha-olefin comonomer units having from 4 to 12 carbon atoms with a density of from 850 kg/m³ to 900 kg/m³; and (D) from 5.0 to 25.0 wt% of an inorganic filler, wherein the amounts of components (A), (B), (C), and (D) are all based on the total weight amount of the polypropylene based composition, said polypropylene based composition having a melt flow rate (MFR2) as measured at 230°C and 2.16 kg load in accordance with ISO 1133 in the range of 2.0 g/10 min to 20.0 g/10 min, an article comprising said polypropylene based composition and the use of said copolymer (B) for reducing the paint adhesion failure of an article comprising said polypropylene based composition.