High flow and stiff polymer material with good transparency and impact properties

Injection molded article comprising a polypropylene composition having a melt flow rate MFR2 (230° C.) measured according to ISO 1133 of equal or above 15 g/10 min comprising

• (a) a crystalline polypropylene matrix (M-PP)
• (b) an elastomeric propylene copolymer phase (E) having
• (i) a propylene content in the range of 40 to 80 wt.-%, and
• (ii) an intrinsic viscosity (IV) measured according to ISO 1628-1 (at 135° C. in decalin) in the range of more than 0.7 to less or equal 2.5 dl/g,
• (c) a first polyethylene (PE1) having
• (i) a density measured according to ISO 1183-187 in the range 905 to 925 kg/m3, and
• (ii) a melt flow rate MFR2 (190° C.) measured according to ISO 1133 of below 30 g/10 min,
• (d) a second polyethylene (PE2) having
• (i) a density measured according to ISO 1183-187 of above 915 kg/m3, and
• (ii) a melt flow rate MFR2 (190° C.) measured according to ISO 1133 of equal or above 30 g/10 min.

Process for the preparation of polypropylene composition having a melt flow rate MFR2 (230° C.) measured according to ISO 1133 of equal or above 15 g/10 min comprising

• (a) a crystalline polypropylene matrix (M-PP)
• (b) an elastomeric propylene copolymer phase (E) having
• (i) a propylene content in the range of 40 to 80 wt.-%, and
• (ii) an intrinsic viscosity (IV) measured according to ISO 1628-1 (at 135° C. in decalin) in the range of more than 0.7 to less or equal 2.5 dl/g,
• (c) a first polyethylene (PE1) having
• (i) a density measured according to ISO 1183-187 in the range 905 to 925 kg/m3, and
• (ii) a melt flow rate MFR2 (190° C.) measured according to ISO 1133 of below 30 g/10 min,
• (d) a second polyethylene (PE2) having
• (i) a density measured according to ISO 1183-187 of above 915 kq/m3, and
• (ii) a melt flow rate MFR2 (190° C.) measured according to ISO 1133 of equal or above 30 g/10 min;
• comprising the steps of mixing up a composition comprising the polypropylene matrix (M-PP) and the elastomeric propylene copolymer phase (E), the first polyethylene (PE1), of the second polyethylene (PE2), and optionally a α-nucleating agent (NA) in an extruder.