High flow heterophasic polyolefin composition having improved stiffness/impact balance

A heterophasic propylene copolymer (HECO) comprising:

• (a) a matrix (M) being a polypropylene (PP), said polypropylene (PP) comprises at least two polypropylene fractions (PP1) and (PP2) and optionally a third polypropylene fraction (PP3), and having a matrix melt flow rate (MFRM) as determined at 230° C. and 2.16 kg load according ISO 1133 in the range of 50.0 to 1000.0 g/10 min, and
• (b) an elastomeric propylene copolymer (EPC) being a copolymer of propylene and ethylene and/or an α-olefin with 4-10 carbon atoms and being dispersed in said matrix (M), said elastomeric propylene copolymer (EPC) comprises at least one propylene copolymer fractions (EPC1) and optionally a second propylene copolymer fraction (EPC2),
• wherein the elastomeric propylene copolymer (EC) is the xylene cold soluble fraction (XCS) determined at 25° C. according ISO 16152 of the heterophasic propylene copolymer (HECO) and has an intrinsic viscosity (iV) measured according to ISO 1628-1 (at 135° C. in decaline) in the range of 2.0 dl/g-4.0 dl/g.
• (c) optionally a crystalline ethylene copolymer (CEC) with an α-olefin with 3-10 carbon atoms being present in the composition as inclusions of the dispersed particles of (b), and
• (d) a polymeric nucleating agent (PNA),
• (i) said heterophasic propylene copolymer (HECO) has a total melt flow rate (MFRT) (230° C.) measured according to ISO 1133 in the range of 25.0 g/10 min to 250 g/10 min.