Low filled automotive polypropylene composition containing recyclates

A composition suitable for automotive application

• obtainable by blending at least components a) to f), or a), b), c), d), and f) under the proviso that e) is not present
• a) 12 to 40 wt.-% of a first heterophasic polypropylene copolymer (HECO 1)
• b) 12 to 40 wt.-% of a second heterophasic polypropylene copolymer (HECO 2)
• c) 15 to 65 wt.-% of a polypropylene-polyethylene blend (A)
• d) 3.0 to 20 wt. % of an inorganic filler
• e) 0 to 14.25 wt.-% of a HDPE
• f) 0.01 to 4.0 wt.-% of additives
• wherein all percentages refer to the total composition, and wherein
• the total content of polyethylene being the sum of said HDPE and the polyethylene of the polypropylene-polyethylene blend (A) ranges from 5.0 to 15.0 wt.-% with respect to the total composition, and wherein
• (i) the first heterophasic polypropylene copolymer (HECO 1) comprises a matrix phase and an elastomer phase dispersed therein, the first heterophasic polypropylene copolymer (HECO 1) having
• a melt flow rate MFR2 (230° C., ISO1133) of 8 to 25 g/10 min;
• and
• an intrinsic viscosity (measured in decalin according to DIN ISO 1628/1 at 135° C.) of 3.1 dl/g to 4.5 dl/g of the xylene cold soluble fraction (XCS) content;
• and
• (ii) the second heterophasic polypropylene copolymer (HECO 2) comprises a matrix phase and an elastomer phase dispersed therein, the second heterophasic polypropylene copolymer (HECO 2) having
• a melt flow rate MFR2 (230° C., ISO1133) of 25 to 75 g/10 min;
• and
• an intrinsic viscosity (measured in decalin according to DIN ISO 1628/1 at 135° C.) of the xylene cold soluble fraction (XCS) content lower than observed for HECO1;
• and wherein
• (iii) the polypropylene-polyethylene blend (A) comprises
• A-1) polypropylene,
• A-2) polyethylene,
• wherein the weight ratio of polypropylene to polyethylene is from 19:1 to 7:3, with the polypropylene-polyethylene blend (A) having
• a melt flow rate MFR2 (230° C., ISO1133) of 5.0 to 30 g/10 min;
• and
• a xylene cold soluble fraction (XCS) of 2.0 to 15 wt.-% (ISO 16152, led, 25° C.);
• and
• optionally a residual ash content of below 3.0 wt.-%,
• and wherein the polypropylene-polyethylene blend (A) has one or more of the following properties
• (aa) a content of limonene as determined by using solid phase microextraction (HS-SPME-GC-MS) of from 0.1 ppm to 100 ppm;
• (bb) a content of fatty acid(s) as determined by using solid phase microextraction (HS-SPME-GC-MS) of 0.1 to 100 ppm;
• (cc) a content of polyamide(s) as determined by FTIR of 0.05 to 1.5 wt.-%;
• (dd) a content of polystyrene(s) as determined by FTIR of 0.05 to 3.0 wt.-%;
• and wherein
• (iv) the inorganic filler,
• has a median particle size dm) before compounding of 0.3 to 3.0 micrometers;
• and wherein
• the HDPE has a melt flow rate (190° C., ISO1133) of 1.0 to 20 g/10 min and a density of 945 to 965 kg/m3
• wherein components a) to e) amount to at least 95 wt.-% of the composition suitable for automotive application.