Recyclate-containing polypropylene compositions with excellent paint adhesion

Abstract

A polypropylene composition (PC) being a mixed-plastic polypropylene blend having: a) an MFR2 of 1.0 to 30.0 g / 10 min; b) a silver paint delamination area of from 0.0 to 20.0 mm2; c) a black paint delamination area of from 0.0 to 20.0 mm2; d) a flexural modulus of 1000 to 2000 MPa e) a limonene content, of 0.10 to 25.0 ppm; and f) a content of inorganic filler (F), having a DL / DS of 1.5 to 4.5, of 5.0 to 20.0 wt.-%, wherein the polymeric part of said polypropylene composition (PC) has: a content of CRYSTEX QC soluble fraction (SF), having an intrinsic viscosity of 2.40 to 3.50 dL / g, of 20.0 to 30.0 wt.-%, and a content of CRYSTEX QC crystalline fraction (CF), having an ethylene content of 6.0 to 10.0 wt.-%, of 70.0 to 80.0 wt.-%.

Description

Recyclate-containing polypropylene compositions with excellent paint adhesionField of the InventionThe present invention relates to a polypropylene composition (PC) being a mixed-plastic polypropylene blend containing recycled material and to articles comprising said polypropylene composition (PC).Background to the InventionPolyolefins, in particular polyethylene and polypropylene, are increasingly consumed in large amounts in a wide range of applications, including packaging for food and other goods, fibres, automotive components, and a great variety of manufactured articles.Polypropylene based materials offer significant potential for mechanical recycling, as these materials are extensively used in packaging. Taking into account the huge amount of waste collected compared to the amount of waste recycled back into the stream, there is still a great potential for intelligent reuse of plastic waste streams and for mechanical recycling of plastic wastes.Development of polyolefins and polyolefin blends is often focused on the continuous goal of improving the balance of mechanical properties, and also the more effective handling of waste streams, for both economical and also environmental reasons. It is usually understood that the use of recycled materials in polymer blends tends to lead to a degradation of mechanical properties, since the mechanical properties of virgin polymers can easily be modified by the polymerization conditions, whereas controlling the properties of a recycled material is intrinsically more difficult, resulting in poorer performance of these compositions.For exterior applications in the automotive industry, materials are required with good flowability, paintability, surface appearance and balanced mechanical properties in terms of stiffness, toughness. Recently, the demand of the market has expanded in direction of using recycled polyolefins in blends with virgin polymers in order to fulfil specific requirements.However, there is a deeply felt need for allowing the dumping and reuse of post-consumer polyolefin recyclates in final products without health and safety hazards.Due to the poor homogeneity of recyclate blends, it is generally observed that properties that would be desirable for automotive exterior articles, for example paint adhesion, are notably lower for such recyclate blends than for similar virgin polymer.As such, there remains a need for recyclate-containing blends with good surface properties, enabling the use of recyclates in applications requiring paint adhesion.Summary of the InventionThe present invention is based on the finding that the blending of a particular recyclate blend with two or more heterophasic propylene-ethylene copolymers, an ethylene-octene elastomer, a filler, and various additives results in the formation of polypropylene compositions with a balanced mechanical profile and excellent paint adhesion.Alternatively, the inventive polypropylene compositions may be described in terms of its composition properties, rather than the components used in the blending.Therefore, in a first aspect, the present invention is directed, in its broadest sense, to a polypropylene composition (PC) being a mixed-plastic polypropylene blend, wherein the polypropylene composition (PC) has: a) a melt flow rate (MFR2), determined according to ISO 1133 at 230 °C and 2.16 kg, in the range from 1.0 to 30.0 g / 10 min; b) a silver paint delamination area, determined as defined in the measurement methods, in the range from 0.0 to 20.0 mm2; c) a black paint delamination area, determined as defined in the measurement methods, in the range from 0.0 to 20.0 mm2; d) a flexural modulus, determined according to ISO 178 using 80x10x4 mm3test bars injection-moulded in line with ISO 19069-2, in the range from 1000 to 2000 MPa;e) a limonene content, determined by solid phase microextraction (HS-SPME-GC-MS), in the range from 0.10 to 25.0 ppm; and f) a content of inorganic filler (F) in the range from 5.0 to 20.0 wt.-%, relative to the total weight of the polypropylene composition (PC), wherein the inorganic filler has a DL / DSvalue, being the ratio of the median diameter (d50) determined according to ISO 13320-1 (laser) and the median diameter (d50) determined according to ISO 13317-3 (sedigraph), in the range from 1.5 to 4.5, wherein the soluble fraction (SF) content of the polymeric part of the polypropylene composition (PC), determined by CRYSTEX QC analysis, is in the range from 20.0 to 30.0 wt.-% and the crystalline fraction (CF) content of the polymeric part of the polypropylene composition (PC), determined by CRYSTEX QC analysis, is in the range from 70.0 to 80.0 wt.-%, with both contents expressed as a wt.-% relative to the total weight of the polymeric part of the polypropylene composition (PC), wherein the soluble fraction (SF) has an intrinsic viscosity (iV(SF)), determined by CRYSTEX QC analysis, in the range from 2.40 to 3.50 dL / g and the crystalline fraction (CF) has an ethylene content (C2(CF)), determined by CRYSTEX QC analysis, in the range from 4.0 to 10.0 wt.-%„It is preferred that the polypropylene composition (PC) is obtainable by blending at least components a) to f): a) from 30.0 to 50.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a first heterophasic propylene-ethylene copolymer (HECO1) having an ethylene content (C2(total)), determined by CRYSTEX QC analysis, in the range from 8.1 to 20.0 wt.-%; b) from 5.0 to 15.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a second heterophasic propylene-ethylene copolymer (HECO2) having an ethylene content (C2(total)), determined by CRYSTEX QC analysis, in the range from 3.0 to 8.0 wt.-%; c) from 20.0 to 30.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a mixed-plastic polypropylene blend (B) having a melt flow rate (MFR2), determined according to ISO 1133 at 230 °C and 2.16 kg, in the range from 10 to 50 g / 10 min;d) from 2.0 to 10.0 wt.-% of an ethylene-octene elastomer (EC); e) from 5.0 to 20.0 wt.-% of the inorganic filler (F); f) from 0.2 to 5.0 wt.-% of further additives (A), wherein the total contents of components a) to 1) add up to at least 95 wt.-%, more preferably at least 98 wt.-%, most preferably 100 wt.-%, relative to the total weight of the polypropylene composition (PC).In a second aspect, the present invention is directed to a polypropylene composition (PC) having a melt flow rate (MFR2), determined according to ISO 1133 at 230 °C and 2.16 kg, in the range from 1.0 to 30.0 g / 10 min and being obtainable by blending at least components a) to f): a) from 30.0 to 50.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a first heterophasic propylene-ethylene copolymer (HECO1) having an ethylene content (C2(total)), determined by CRYSTEX QC analysis, in the range from 8.1 to 20.0 wt.-%; b) from 5.0 to 15.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a second heterophasic propylene-ethylene copolymer (HECO2) having an ethylene content (C2(total)), determined by CRYSTEX QC analysis, in the range from 3.0 to 8.0 wt.-%; c) from 20.0 to 30.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a mixed-plastic polypropylene blend (B) having a melt flow rate (MFR2), determined according to ISO 1133 at 230 °C and 2.16 kg, in the range from 10 to 50 g / 10 min; d) from 2.0 to 10.0 wt.-% of an ethylene-octene elastomer (EC); e) from 5.0 to 20.0 wt.-% of an inorganic filler (F); f) from 0.2 to 5.0 wt.-% of further additives (A), wherein the total contents of components a) to f) add up to at least 95 wt.-%, more preferably at least 98 wt.-%, most preferably 100 wt.-%, relative to the total weight of the polypropylene composition (PC).In a further aspect, the present invention is directed to an article, preferably an injection- moulded article, comprising the polypropylene composition (PC) of the first or second aspects in an amount of at least 95 wt.-%, more preferably at least 98 wt.-%, most preferably at least 99 wt.-%.DefinitionsUnless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the invention pertains. Although, any methods and materials similar or equivalent to those described herein can be used in practice for testing of the present invention, the preferred materials and methods are described herein. In describing and claiming the present invention, the following terminology will be used in accordance with the definitions set out below.Unless clearly indicated otherwise, use of the terms “a,” “an,” and the like refers to one or more.In the following, amounts are given in % by weight (wt.-%) unless it is stated otherwise.A propylene homopolymer is a polymer that essentially consists of propylene monomer units. Due to impurities especially during commercial polymerization processes, a propylene homopolymer can comprise up to 0.1 mol% comonomer units, preferably up to 0.05 mol% comonomer units and most preferably up to 0.01 mol% comonomer units.A propylene copolymer is a copolymer of propylene monomer units and comonomer units, preferably selected from ethylene and C4-C8alpha-olefins. A propylene random copolymer is a propylene copolymer wherein the comonomer units are randomly distributed along the polymer chain, whilst a propylene block copolymer comprises blocks of propylene monomer units and blocks of comonomer units. Propylene random copolymers can comprise comonomer units from one or more comonomers different in their amounts of carbon atoms.Heterophasic propylene copolymers typically comprise: a) a crystalline propylene homopolymer or copolymer matrix (M); and b) an elastomeric rubber, preferably a propylene-ethylene copolymer (E);In case of a random heterophasic propylene copolymer, said crystalline matrix phase is a random copolymer of propylene and at least one alpha-olefin comonomer.The elastomeric phase can be a propylene copolymer with a high amount of comonomer that is not randomly distributed in the polymer chain but is distributed in a comonomer-rich block structure and a propylene-rich block structure. A heterophasic polypropylene usually differentiates from a one-phasic propylene copolymer in that it shows two distinct glass transition temperatures Tg which are attributed to the matrix phase and the elastomeric phase.For the purposes of the present description and of the subsequent claims, the term “recycled waste” is used to indicate a material recovered from both post-consumer waste and industrial waste, as opposed to virgin polymers. Post-consumer waste refers to objects having completed at least a first use cycle (or life cycle), i.e. having already served their first purpose; while industrial waste refers to manufacturing scrap, which does not normally reach a consumer.The term “virgin” denotes the newly produced materials and / or objects prior to their first use, which have not already been recycled.The term “recycled material” such as used herein denotes materials reprocessed from “recycled waste”.A polymer blend denotes a mixture of two or more polymeric components. In general, the blend can be prepared by mixing the two or more polymeric components. Suitable mixing procedures known in the art are post-polymerization blending procedures.Post-polymerization blending can be dry blending of polymeric components such as polymerpowders and / or compounded polymer pellets or melt blending by melt mixing the polymeric components.A mixed-plastic polypropylene blend indicates that the blend predominantly comprises polypropylene; however, small amounts of other plastic are present. Recyclate blends, in particular post-consumer recyclate blends, are almost always mixed-plastic blends, which reflects the efficiency of the sorting in state of the art recycling processes.The present invention will now be described in more detail.Detailed DescriptionPolypropylene composition (PC) of the first aspectThe present invention is directed, in a first aspect, to a polypropylene composition (PC) being a mixed-plastic polypropylene blend.The polypropylene composition (PC) has a melt flow rate (MFR2), determined according to ISO 1133 at 230 °C and 2.16 kg, in the range from 1.0 to 30.0 g / 10 min, more preferably in the range from 3.0 to 20.0 g / 10 min, most preferably in the range from 5.0 to 15.0 g / 10 min.The polypropylene composition (PC) has a silver paint delamination area in the range from 0.0 to 20.0 mm2, more preferably in the range from 0.0 to 10.0 mm2, most preferably in the range from 0.0 to 5.0 mm2.The polypropylene composition (PC) has a black paint delamination area in the range from 0.0 to 20.0 mm2, more preferably in the range from 0.0 to 10.0 mm2, most preferably in the range from 0.0 to 5.0 mm2.The polypropylene composition (PC) has a limonene content, determined by solid phase microextraction (HS-SPME-GC-MS), in the range from 0.10 to 25.0 ppm.This limonene content is indicative that the polypropylene composition (PC) contains at least one component that originates from post-consumer waste. As such, it is also preferred that the polypropylene composition (PC) contains a recycled material, i.e. comprises a recyclate. It is particularly preferred that the polypropylene composition (PC) is at least partially derived from post-consumer waste.The polypropylene composition (PC) has a flexural modulus, determined according to ISO 178 using 80x10x4 mm3test bars injection-moulded in line with ISO 19069-2, in the range from 1000 to 2000 MPa, more preferably in the range from 1200 to 1800 MPa, most preferably in the range from 1400 to 1600 MPa.The polypropylene composition (PC) preferably has a Charpy Notched impact strength at 23 °C, determined according to ISO 179 using 80x10x4 mm3test bars injection-moulded in line with ISO 19069-2, in the range from 40 to 100 kJ / m2, more preferably in the range from 45 to 90 kJ / m2, most preferably in the range from 50 to 80 kJ / m2.The polypropylene composition (PC) preferably has a Charpy Notched impact strength at - 20 °C, determined according to ISO 179 using 80x10x4 mm3test bars injection-moulded in line with ISO 19069-2, in the range from 3.0 to 15.0 kJ / m2, more preferably in the range from 4.0 to 12.0 kJ / m2, most preferably in the range from 5.0 to 9.0 kJ / m2.The polypropylene composition (PC) preferably has a coefficient of linear thermal expansion (CLTE) in the machine direction, determined according to ISO 11359-2, of 0 to 100 x 10'6 / K, more preferably in the range of from 50 to 95 x 10-6 / K, most preferably in the range from 70 to 90 xlO-e / K.The polypropylene composition (PC) has a content of inorganic filler (F) in the range from 5.0 to 20.0 wt.-%, more preferably in the range from 9.0 to 18.0 wt.-%, most preferably in the range from 13.0 to 17.0 wt.-%.The inorganic filler (F) has a DL / DSvalue, being the ratio of the median diameter (d50) determined according to ISO 13320-1 (laser) and the median diameter (d50) determined according to ISO 13317-3 (sedigraph), in the range from 1.5 to 4.5, more preferably in the range from 1.8 to 4.0, most preferably in the range from 2.0 to 3.5.The DL / DSvalue is used as an indicator of the aspect ratio of the inorganic filler, wherein a higher DL / DSvalue is indicative of a higher aspect ratio.The inorganic filler (F) preferably has a median diameter (d50), determined according to ISO 13320-1 (laser), in the range from 3.0 to 10.0 pm, more preferably in the range from 4.0 to 8.5 pm, most preferably in the range from 4.5 to 7.0 pm.The inorganic filler (F) preferably has a top cut diameter (CL95), determined according to ISO 13320-1 (laser), in the range from 8.0 to 30.0 pm, more preferably in the range from 9.0 to 25.0 pm, most preferably in the range from 10.0 to 20.0 pm.The inorganic filler (F) preferably has a median diameter (d5o), determined according to ISO 13317-3 (sedigraph), in the range from 1.0 to 3.0 pm, more preferably in the range from 1.3 to 2.5 pm, most preferably in the range from 1.5 to 2.0 pm.The inorganic filler (F) preferably has a top cut diameter (d95), determined according to ISO 13317-3 (sedigraph), in the range from 4.0 to 10.0 pm, more preferably in the range from 4.5 to 9.0 pm, most preferably in the range from 5.0 to 8.0 pm.It is preferred that the inorganic filler is selected from the group containing talc, calcium carbonate, barium sulfate, mica, and mixtures thereof.Most preferably, the inorganic filler (F) is talc.The polymeric part of the polypropylene composition (PC) may be characterized according to the the CRYSTEX QC method using trichlorobenzene (TCB) as a solvent. This method isdescribed below in the determination methods section. The crystalline fraction (CF) contains for the most part the matrix phase and only a small part of the elastomeric phase and the soluble fraction (SF) contains for the most part the elastomeric phase and only a small part of the matrix phase. In some cases, this method results in more useful data, since the crystalline fraction (CF) and the soluble fraction (SF) more accurately correspond to the matrix and elastomeric phases respectively. Due to the differences in the separation methods of xylene extraction and CRYSTEX QC method the properties of XCS / XCI fractions on the one hand and crystalline / soluble (CF / SF) fractions on the other hand are not exactly the same, meaning that the amounts of matrix phase and elastomeric phase can differ as well as the properties.The polymeric part of the polypropylene composition (PC) preferably has an ethylene content (C2(total)), determined by CRYSTEX QC analysis, in the range from 10.0 to 30.0 wt.-%, more preferably in the range from 13.0 to 25.0 wt.-%, most preferably in the range from 15.0 to 20.0 wt.-%.The polymeric part of the polypropylene composition (PC) preferably has an intrinsic viscosity (iV(total)), determined by CRYSTEX QC analysis, in the range from 1.50 to 3.00 dL / g, more preferably in the range from 1.60 to 2.60 dL / g, most preferably in the range from 1.70 to 2.20 dL / g.The polymeric part of the polypropylene composition (PC) has a soluble fraction (SF) content, determined by CRYSTEX QC analysis, in the range from 20.0 to 30.0 wt.-%, more preferably in the range from 23.0 to 30.0 wt.-%, most preferably in the range from 25.0 to 30.0 wt.-%Said soluble fraction (SF) preferably has an ethylene content (C2(SF)), determined by CRYSTEX QC analysis, in the range from 30.0 to 60.0 wt.-%, more preferably in the range from 35.0 to 55.0 wt.-%, most preferably in the range from 40.0 to 50.0 wt.-%.Said soluble fraction (SF) has an intrinsic viscosity (iV(SF)), determined by CRYSTEX QC analysis, in the range from 2.40 to 3.50 dL / g, more preferably in the range from 2.45 to 3.20 dL / g, most preferably in the range from 2.50 to 2.90 dL / g.The polymeric part of the polypropylene composition (PC) has a crystalline fraction (CF) content, determined by CRYSTEX QC analysis, in the range from 70.0 to 80.0 wt.-%, more preferably in the range from 70.0 to 77.0 wt.-%, most preferably in the range from 70.0 to 75.0 wt.-%Said crystalline fraction (CF) has an ethylene content (C2(CF)), determined by CRYSTEX QC analysis, in the range from 4.0 to 10.0 wt.-%, more preferably in the range from 4.0 to 8.0 wt.-%, most preferably in the range from 4.0 to 6.0 wt.-%.Said crystalline fraction (CF) also preferably has an intrinsic viscosity (iV(CF)), determined by CRYSTEX QC analysis, in the range from 1.00 to 2.50 dL / g, more preferably in the range from 1.20 to 2.20 dL / g, most preferably in the range from 1.40 to 1.90 dL / g.It is also preferred that the ratio of the intrinsic viscosity of the soluble and crystalline fractions, (iV(SF) / iV(CF)), determined by CRYSTEX QC analysis, is in the range from 1.00 to 3.00, more preferably in the range from 1.30 to 2.50, most preferably in the range from 1.50 to 2.00.It is also preferred that the ratio of the ethylene content of the soluble and crystalline fractions, (C2(SF) / C2(CF)), determined by CRYSTEX QC analysis, is in the range from 6.0 to 12.0, more preferably in the range from 7.0 to 11.0, most preferably in the range from 8.0 to 10.0.The polypropylene composition (PC) is preferably obtainable by blending at least components a) to f): a) from 30.0 to 50.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a first heterophasic propylene-ethylene copolymer (HECO1);b) from 5.0 to 15.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a second heterophasic propylene-ethylene copolymer (HECO2); c) from 20.0 to 30.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a mixed-plastic polypropylene blend (B); d) from 2.0 to 10.0 wt.-% of an ethylene-octene elastomer (EC); e) from 5.0 to 20.0 wt.-% of the inorganic filler (F); f) from 0.2 to 5.0 wt.-% of further additives (A).The total contents of components a) to f) add up to at least 95 wt.-%, more preferably at least 98 wt.-%, most preferably 100 wt.-%, relative to the total weight of the polypropylene composition (PC).More preferably, the polypropylene composition (PC) is obtainable by blending at least components a) to f): a) from 35.0 to 45.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a first heterophasic propylene-ethylene copolymer (HECO1); b) from 6.0 to 13.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a second heterophasic propylene-ethylene copolymer (HECO2); c) from 22.0 to 28.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a mixed-plastic polypropylene blend (B); d) from 5.0 to 10.0 wt.-% of an ethylene-octene elastomer (EC); e) from 9.0 to 18.0 wt.-% of the inorganic filler (F); f) from 0.2 to 5.0 wt.-% of further additives (A).Most preferably, the polypropylene composition (PC) is obtainable by blending at least components a) to f): a) from 37.0 to 41.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a first heterophasic propylene-ethylene copolymer (HECO1); b) from 8.0 to 11.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a second heterophasic propylene-ethylene copolymer (HECO2);c) from 23.0 to 27.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a mixed-plastic polypropylene blend (B); d) from 8.0 to 10.0 wt.-% of an ethylene-octene elastomer (EC); e) from 13.0 to 17.0 wt.-% of the inorganic filler (F); f) from 0.2 to 5.0 wt.-% of further additives (A).The blending of the polypropylene composition (PC) may be carried out according to a process comprising the steps of: a) providing the first heterophasic propylene-ethylene copolymer (HECO1), the optional second heterophasic propylene-ethylene copolymer (HECO2), the mixed- plastic polypropylene blend (B), the ethylene-octene elastomer (EC), the inorganic filler (F), and the further additives (A); b) blending and extruding the first heterophasic propylene-ethylene copolymer (HECO1), the optional second heterophasic propylene-ethylene copolymer (HECO2), the mixed-plastic polypropylene blend (B), the ethylene-octene elastomer (EC), the inorganic filler (F) and the further additives (A) at a temperature in the range from 120 to 250 °C in an extruder, preferably a twin-screw extruder, thereby generating the polypropylene composition (PC), preferably in pellet form.In particular, it is preferred to use a conventional compounding or blending apparatus, e.g. a Banbury mixer, a 2-roll rubber mill, Buss-co-kneader or a twin-screw extruder. More preferably, mixing is accomplished in a co-rotating twin-screw extruder. The polymer materials recovered from the extruder are usually in the form of pellets.Polypropylene composition (PC) of the second aspectThe polypropylene composition (PC) of the second aspect is obtainable by blending at least components a) to f): a) from 30.0 to 50.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a first heterophasic propylene-ethylene copolymer (HECO1);b) from 5.0 to 15.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a second heterophasic propylene-ethylene copolymer (HECO2); c) from 20.0 to 30.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a mixed-plastic polypropylene blend (B); d) from 2.0 to 10.0 wt.-% of an ethylene-octene elastomer (EC); e) from 5.0 to 20.0 wt.-% of an inorganic filler (F); f) from 0.2 to 5.0 wt.-% of further additives (A).The total contents of components a) to f) add up to at least 95 wt.-%, more preferably at least 98 wt.-%, most preferably 100 wt.-%, relative to the total weight of the polypropylene composition (PC).More preferably, the polypropylene composition (PC) is obtainable by blending at least components a) to f): a) from 35.0 to 45.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a first heterophasic propylene-ethylene copolymer (HECO1); b) from 6.0 to 13.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a second heterophasic propylene-ethylene copolymer (HECO2); c) from 22.0 to 28.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a mixed-plastic polypropylene blend (B); d) from 5.0 to 10.0 wt.-% of an ethylene-octene elastomer (EC); e) from 9.0 to 18.0 wt.-% of an inorganic filler (F); f) from 0.2 to 5.0 wt.-% of further additives (A).Most preferably, the polypropylene composition (PC) is obtainable by blending at least components a) to f): a) from 37.0 to 41.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a first heterophasic propylene-ethylene copolymer (HECO1); b) from 8.0 to 11.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a second heterophasic propylene-ethylene copolymer (HECO2);c) from 23.0 to 27.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a mixed-plastic polypropylene blend (B); d) from 8.0 to 10.0 wt.-% of an ethylene-octene elastomer (EC); e) from 13.0 to 17.0 wt.-% of an inorganic filler (F); f) from 0.2 to 5.0 wt.-% of further additives (A).The blending of the polypropylene composition (PC) may be carried out according to a process comprising the steps of: a) providing the first heterophasic propylene-ethylene copolymer (HECO1), the optional second heterophasic propylene-ethylene copolymer (HECO2), the mixed- plastic polypropylene blend (B), the ethylene-octene elastomer (EC), the inorganic filler (F), and the further additives (A); b) blending and extruding the first heterophasic propylene-ethylene copolymer (HECO1), the optional second heterophasic propylene-ethylene copolymer (HECO2), the mixed-plastic polypropylene blend (B), the ethylene-octene elastomer (EC), the inorganic filler (F) and the further additives (A) at a temperature in the range from 120 to 250 °C in an extruder, preferably a twin-screw extruder, thereby generating the polypropylene composition (PC), preferably in pellet form.In particular, it is preferred to use a conventional compounding or blending apparatus, e.g. a Banbury mixer, a 2-roll rubber mill, Buss-co-kneader or a twin-screw extruder. More preferably, mixing is accomplished in a co-rotating twin-screw extruder. The polymer materials recovered from the extruder are usually in the form of pellets.The polypropylene composition (PC) has a melt flow rate (MFR2), determined according to ISO 1133 at 230 °C and 2.16 kg, in the range from 1.0 to 30.0 g / 10 min, more preferably in the range from 3.0 to 20.0 g / 10 min, most preferably in the range from 5.0 to 15.0 g / 10 min.The polypropylene composition (PC) preferably has a silver paint delamination area in the range from 0.0 to 20.0 mm2, more preferably in the range from 0.0 to 10.0 mm2, most preferably in the range from 0.0 to 5.0 mm2.The polypropylene composition (PC) preferably has a black paint delamination area in the range from 0.0 to 20.0 mm2, more preferably in the range from 0.0 to 10.0 mm2, most preferably in the range from 0.0 to 5.0 mm2.The polypropylene composition (PC) preferably has a limonene content, determined by solid phase microextraction (HS-SPME-GC-MS), in the range from 0.10 to 25.0 ppm.This limonene content is indicative that the polypropylene composition (PC) contains at least one component that originates from post-consumer waste. As such, it is also preferred that the polypropylene composition (PC) contains a recycled material, i.e. comprises a recyclate. It is particularly preferred that the polypropylene composition (PC) is at least partially derived from post-consumer waste.The polypropylene composition (PC) preferably has a flexural modulus, determined according to ISO 178 using 80x10x4 mm3test bars injection-moulded in line with ISO 19069-2, in the range from 1000 to 2000 MPa, more preferably in the range from 1200 to 1800 MPa, most preferably in the range from 1400 to 1600 MPa.The polypropylene composition (PC) preferably has a Charpy Notched impact strength at 23 °C, determined according to ISO 179 using 80x10x4 mm3test bars injection-moulded in line with ISO 19069-2, in the range from 40 to 100 kJ / m2, more preferably in the range from 45 to 90 kJ / m2, most preferably in the range from 50 to 80 kJ / m2.The polypropylene composition (PC) preferably has a Charpy Notched impact strength at - 20 °C, determined according to ISO 179 using 80x10x4 mm3test bars injection-moulded in line with ISO 19069-2, in the range from 3.0 to 15.0 kJ / m2, more preferably in the range from 4.0 to 12.0 kJ / m2, most preferably in the range from 5.0 to 9.0 kJ / m2.The polypropylene composition (PC) preferably has a coefficient of linear thermal expansion (CLTE) in the machine direction, determined according to ISO 11359-2, of 0 to 100 x 10‘6 / K,more preferably in the range of from 50 to 95* 10‘6 / K, most preferably in the range from 70 to 90 x!0-6 / K.The polymeric part of the polypropylene composition (PC) preferably has an ethylene content (C2(total)), determined by CRYSTEX QC analysis, in the range from 10.0 to 30.0 wt.-%, more preferably in the range from 13.0 to 25.0 wt.-%, most preferably in the range from 15.0 to 20.0 wt.-%.The polymeric part of the polypropylene composition (PC) preferably has an intrinsic viscosity (iV(total)), determined by CRYSTEX QC analysis, in the range from 1.50 to 3.00 dL / g, more preferably in the range from 1.60 to 2.60 dL / g, most preferably in the range from 1.70 to 2.20 dL / g.The polymeric part of the polypropylene composition (PC) preferably has a soluble fraction (SF) content, determined by CRYSTEX QC analysis, in the range from 20.0 to 30.0 wt.-%, more preferably in the range from 23.0 to 30.0 wt.-%, most preferably in the range from 25.0 to 30.0 wt.-%Said soluble fraction (SF) preferably has an ethylene content (C2(SF)) determined by CRYSTEX QC analysis, in the range from 30.0 to 60.0 wt.-%, more preferably in the range from 35.0 to 55.0 wt.-%, most preferably in the range from 40.0 to 50.0 wt.-%.Said soluble fraction (SF) preferably has an intrinsic viscosity (iV(SF)), determined by CRYSTEX QC analysis, in the range from 2.40 to 3.50 dL / g, more preferably in the range from 2.45 to 3.20 dL / g, most preferably in the range from 2.50 to 2.90 dL / g.The polymeric part of the polypropylene composition (PC) preferably has a crystalline fraction (CF) content, determined by CRYSTEX QC analysis, in the range from 70.0 to 80.0 wt.-%, more preferably in the range from 70.0 to 77.0 wt.-%, most preferably in the range from 70.0 to 75.0 wt.-%Said crystalline fraction (CF) preferably has an ethylene content (C2(CF)) determined by CRYSTEX QC analysis, in the range from 4.0 to 10.0 wt.-%, more preferably in the range from 4.0 to 8.0 wt.-%, most preferably in the range from 4.0 to 6.0 wt.-%.Said crystalline fraction (CF) also preferably has an intrinsic viscosity (iV(CF)), determined by CRYSTEX QC analysis, in the range from 1.00 to 2.50 dL / g, more preferably in the range from 1.20 to 2.20 dL / g, most preferably in the range from 1.40 to 1.90 dL / g.It is also preferred that the ratio of the intrinsic viscosity of the soluble and crystalline fractions, (iV(SF) / iV(CF)), determined by CRYSTEX QC analysis, is in the range from 1.00 to 3.00, more preferably in the range from 1.30 to 2.50, most preferably in the range from 1.50 to 2.00.It is also preferred that the ratio of the ethylene content of the soluble and crystalline fractions, (C2(SF) / C2(CF)), determined by CRYSTEX QC analysis, is in the range from 6.0 to 12.0, more preferably in the range from 7.0 to 11.0, most preferably in the range from 8.0 to 10.0.The properties of the individual components (for both the first and second aspects) will now be detailed in the following sections.First heterophasic propylene-ethylene copolymer (HECO1)The first heterophasic propylene ethylene copolymer (HECO1) is provided in an amount in the range from 30.0 to 50.0 wt.-%, more preferably in the range from 35.0 to 45.0 wt.-%, most preferably in the range from 37.0 to 41.0 wt.-%, relative to the total weight of the polypropylene composition (PC).The first heterophasic propylene ethylene copolymer (HECO1) preferably has a melt flow rate (MFR2), determined according to ISO 1133 at 230 °C and 2.16 kg, in the range from 1.0to 50 g / 10 min, more preferably in the range from 3.0 to 30 g / 10 min, most preferably in the range from 5.0 to 20 g / 10 min.The first heterophasic propylene ethylene copolymer (HECO1) has an ethylene content (C2(total)), determined by CRYSTEX QC analysis, in the range from 8.1 to 20.0 wt.-%, more preferably in the range from 10.0 to 18.0 wt.-%, most preferably in the range from 13.0 to 17.0 wt.-%.The first heterophasic propylene ethylene copolymer (HECO1) preferably has a soluble fraction (SF) content, determined by CRYSTEX QC analysis, in the range from 20.0 to 40.0 wt.-%, more preferably in the range from 25.0 to 37.0 wt.-%, most preferably in the range from 29.0 to 35.0 wt.-%.The first heterophasic propylene ethylene copolymer (HECO1) preferably has an ethylene content of the soluble fraction (C2(SF)), determined by CRYSTEX QC analysis, in the range from 25.0 to 45.0 wt.-%, more preferably in the range from 30.0 to 42.0 wt.-%, most preferably in the range from 35.0 to 40.0 wt.-%.The first heterophasic propylene ethylene copolymer (HECO1) has an intrinsic viscosity of the soluble fraction (iV(SF)), determined by CRYSTEX QC analysis, in the range from 2.00 to 4.00 dL / g, more preferably in the range from 2.60 to 3.80 dL / g, most preferably in the range from 3.20 to 3.60 dL / g.The first heterophasic propylene ethylene copolymer (HECO1) preferably has a crystalline fraction (CF) content, determined by CRYSTEX QC analysis, in the range from 60.0 to 80.0 wt.-%, more preferably in the range from 63.0 to 75.0 wt.-%, most preferably in the range from 65.0 to 71.0 wt.-%.The first heterophasic propylene ethylene copolymer (HECO1) preferably has an ethylene content of the crystalline fraction (C2(CF)), determined by CRYSTEX QC analysis, in therange from 1.0 to 8.0 wt.-%, more preferably in the range from 2.0 to 7.0 wt.-%, most preferably in the range from 4.0 to 6.0 wt.-%.The first heterophasic propylene ethylene copolymer (HECO1) has an intrinsic viscosity of the crystalline fraction (iV(CF)), determined by CRYSTEX QC analysis, in the range from 1.10 to 2.00 dL / g, more preferably in the range from 1.20 to 1.80 dL / g, most preferably in the range from 1.30 to 1.60 dL / g.It is also preferred that the ratio of the intrinsic viscosity of the soluble and crystalline fractions, (iV(SF)ZiV(CF)), determined by CRYSTEX QC analysis, is in the range from 1.20 to 4.00, more preferably in the range from 1.50 to 3.00, most preferably in the range from 2.00 to 2.50.Second heterophasic propylene-ethylene copolymer (HECO2)The second heterophasic propylene ethylene copolymer (HECO2) is provided in an amount in the range from 6.0 to 13.0 wt.-%, more preferably in the range from 5.0 to 15.0 wt.-%, most preferably in the range from 8.0 to 11.0 wt.-%, relative to the total weight of the polypropylene composition (PC).The second heterophasic propylene ethylene copolymer (HECO2) preferably has a melt flow rate (MFR2), determined according to ISO 1133 at 230 °C and 2.16 kg, in the range from 1.0 to 15 g / 10 min, more preferably in the range from 3.0 to 10.0 g / 10 min, most preferably in the range from 5.0 to 8.0 g / 10 min.The second heterophasic propylene ethylene copolymer (HECO2) has an ethylene content (C2(total)), determined by CRYSTEX QC analysis, in the range from 3.0 to 8.0 wt.-%, more preferably in the range from 4.0 to 8.0 wt.-%, most preferably in the range from 5.0 to 8.0 wt.-%.The second heterophasic propylene ethylene copolymer (HECO2) preferably has a soluble fraction (SF) content, determined by CRYSTEX QC analysis, in the range from 10.0 to 30.0 wt.-%, more preferably in the range from 14.0 to 27.0 wt.-%, most preferably in the range from 18.0 to 24.0 wt.-%.The second heterophasic propylene ethylene copolymer (HECO2) preferably has an ethylene content of the soluble fraction (C2(SF)), determined by CRYSTEX QC analysis, in the range from 10.0 to 30.0 wt.-%, more preferably in the range from 15.0 to 27.0 wt.-%, most preferably in the range from 20.0 to 25.0 wt.-%.The second heterophasic propylene ethylene copolymer (HECO2) has an intrinsic viscosity of the soluble fraction (iV(SF)), determined by CRYSTEX QC analysis, in the range from 3.00 to 7.00 dL / g, more preferably in the range from 4.00 to 6.00 dL / g, most preferably in the range from 4.50 to 5.50 dL / g.The second heterophasic propylene ethylene copolymer (HECO2) preferably has a crystalline fraction (CF) content, determined by CRYSTEX QC analysis, in the range from 70.0 to 90.0 wt.-%, more preferably in the range from 73.0 to 86.0 wt.-%, most preferably in the range from 76.0 to 82.0 wt.-%.The second heterophasic propylene ethylene copolymer (HECO2) preferably has an ethylene content of the crystalline fraction (C2(CF)), determined by CRYSTEX QC analysis, in the range from 0.0 to 5.0 wt.-%, more preferably in the range from 0.5 to 4.0 wt.-%, most preferably in the range from 1.0 to 3.0 wt.-%.The second heterophasic propylene ethylene copolymer (HECO2) has an intrinsic viscosity of the crystalline fraction (iV(CF)), determined by CRYSTEX QC analysis, in the range from 1.40 to 2.70 dL / g, more preferably in the range from 1.60 to 2.40 dL / g, most preferably in the range from 1.80 to 2.10 dL / g.It is also preferred that the ratio of the intrinsic viscosity of the soluble and crystalline fractions, (iV(SF) / iV(CF)), determined by CRYSTEX QC analysis, is in the range from 2.00 to 5.00, more preferably in the range from 2.30 to 4.00, most preferably in the range from 2.50 to 3.00.Mixed-plastic polypropylene blend (B)The mixed-plastic polypropylene blend (B) is provided in an amount in the range from 20.0 to 30.0 wt.-%, more preferably in the range from 22.0 to 28.0 wt.-%, most preferably in the range from 23.0 to 27.0 wt.-%, relative to the total weight of the polypropylene composition (PC).The mixed-plastic polypropylene blend (B) is a polypropylene rich recycled material, meaning that it comprises significantly more polypropylene than polyethylene. Recycled waste streams, which are high in polypropylene can be obtained for example from the automobile industry, particularly as some automobile parts such as bumpers are sources of fairly pure polypropylene material in a recycling stream.Preferably, the polypropylene rich recycled material is obtained from recycled waste by means of plastic recycling processes known in the art. Such recyclates are commercially available, e.g. from Corepla (Italian Consortium for the collection, recovery, recycling of packaging plastic wastes), Resource Plastics Corp. (Brampton, ON), Kruschitz GmbH, Plastics and Recycling (AT), Vogt Plastik GmbH (DE), Mtm Plastics GmbH (DE) etc. Non- exhaustive examples of polypropylene rich recycled materials include: Purpolen®PP (Mtm Plastics GmbH), Axpoly® recycled polypropylene pellets (Axion Ltd) and PolyPropylene Copolymer (BSP Compounds).During recycling, any reasonable measure will usually be taken for any components other than polyethylene and polypropylene to be reduced / removed as far as the final application or use suggests such measures; however, other components are often present in small amounts.Other such components include polystyrene (PS), polyamides (PA), polyethylene terephthalate (PET), which are all present in as low an amount as possible, preferably below the detection limit.The mixed-plastic polypropylene blend (B) has a melt flow (MFR2), determined according to ISO 1133 at 230 °C and 2.16 kg, in the range from 10.0 to 50 g / 10 min, more preferably in the range from 15 to 40 g / 10 min, most preferably in the range from 20 to 30 g / 10 min.The mixed-plastic polypropylene blend (B) preferably has an ethylene content (C2(total)), determined by CRYSTEX QC analysis, in the range from 2.5 to 10.0 wt.-%, more preferably in the range from 3.0 to 9.0 wt.-%, most preferably in the range from 4.0 to 8.0 wt.-%.The mixed-plastic polypropylene blend (B) preferably has a soluble fraction (SF) content, determined by CRYSTEX QC analysis, in the range from 4.0 to 15.0 wt.-%, more preferably in the range from 6.0 to 14.0 wt.-%, most preferably in the range from 8.0 to 13.0 wt.-%.The mixed-plastic polypropylene blend (B) preferably has a crystalline fraction (CF) content, determined by CRYSTEX QC analysis, in the range from 85.0 to 96.0 wt.-%, more preferably in the range from 86.0 to 94.0 wt.-%, most preferably in the range from 87.0 to 92.0 wt.-%.The mixed-plastic polypropylene blend (B) preferably has an ethylene content of the soluble fraction (C2(SF)), determined by CRYSTEX QC analysis, in the range from 20.0 to 50.0 wt.-%, more preferably in the range from 22.0 to 40.0 wt.-%, most preferably in the range from 24.0 to 35.0 wt.-%.The mixed-plastic polypropylene blend (B) preferably has an ethylene content of the crystalline fraction (C2(CF)), determined by CRYSTEX QC analysis, in the range from 1.0 to 8.0 wt.-%, more preferably in the range from 1.5 to 6.0 wt.-%, most preferably in the range from 2.0 to 4.0 wt.-%.The mixed-plastic polypropylene blend (B) preferably has an intrinsic viscosity of the soluble fraction (iV(SF)), determined by CRYSTEX QC analysis, in the range from 1.00 to 2.20 dL / g, more preferably in the range from 1.30 to 2.00 dL / g, most preferably in the range from 1.60 to 1.90 dL / g.The mixed-plastic polypropylene blend (B) preferably has an intrinsic viscosity of the crystalline fraction (iV(CF)), determined by CRYSTEX QC analysis, in the range from 1.00 to 2.20 dL / g, more preferably in the range from 1.20 to 2.00 dL / g, most preferably in the range from 1.40 to 1.70 dL / g.The mixed-plastic polypropylene blend (B) preferably has an inorganic residue content, as determined by calcination analysis according to DIN ISO 1172: 1996, of 0.05 to 5.0 wt.-%, more preferably in the range from 0.10 to 3.0 wt.-%, most preferably in the range from 0.50 to 2.0 wt.-%The mixed-plastic polypropylene blend (B) preferably originates from post-industrial waste or post-consumer waste, most preferably from post-consumer waste.The mixed-plastic polypropylene blend (B) preferably has a limonene content, determined by solid phase microextraction (HS-SPME-GC-MS), in the range from 0.10 to 25.0 ppm.The presence of limonene is indicative that the mixed-plastic polypropylene blend (B) originates from post-consumer waste.Further indications of the recycled-nature of the mixed-plastic polypropylene blend (B) include the presence of other polymers, such as polystyrene and polyamide-6, and the presence of fatty acids.Accordingly, it is further preferred that the mixed-plastic polypropylene blend (B) comprises one or more of polystyrene, polyamide-6 and fatty acids, preferably comprises each of polystyrene, polyamide-6 and fatty acids.The mixed-plastic polypropylene blend (B) preferably has a Charpy Notched impact strength at 23 °C, determined according to ISO 179 using 80x10x4 mm3test bars injection-moulded in line with ISO 19069-2, in the range from 1.0 to 20.0 kJ / m2, more preferably in the range from 2.0 to 15.0 kJ / m2, most preferably in the range from 3.0 to 10.0 kJ / m2.The mixed-plastic polypropylene blend (B) preferably has a flexural modulus, determined according to ISO 178 using 80x10x4 mm3test bars injection-moulded in line with ISO 19069-2, in the range from 1000 to 1600 MPa, more preferably in the range from 1100 to 1500 MPa, most preferably in the range from 1200 to 1400 MPa.The mixed-plastic polypropylene blend (B) preferably has a density, determined according to ISO 1183-187, in the range from 890 to 950 kg / m3, more preferably in the range from 900 to 940 kg / m3, most preferably in the range from 910 to 930 kg / m3.Ethylene-octene elastomer (EC)The ethylene-octene elastomer (EC) is an elastomeric copolymer containing ethylene monomers and 1 -octene comonomers.The ethylene-octene elastomer (EC) is provided in an amount in the range from 2.0 to 10.0 wt.-%, more preferably in the range from 5.0 to 10.0 wt.-%, most preferably in the range from 8.0 to 10.0 wt.-%, relative to the total weight of the polypropylene composition (PC).The ethylene-octene elastomer (EC) preferably has a melt flow rate (MFR2), determined according to ISO 1133 at 190 °C and 2.16 kg, in the range from 2.0 to 20 g / 10 min, more preferably in the range from 5.0 to 15 g / 10 min, most preferably in the range from 7.0 to 13 g / 10 min.The ethylene-octene elastomer (EC) preferably has a density, determined according to ISO 1183-187, in the range from 870 to 900 kg / m3, more preferably in the range from 875 to 894 kg / m3, most preferably in the range from 880 to 888 kg / m3.Inorganic filler (F)The inorganic filler (F) is provided in an amount in the range from 5.0 to 20.0 wt.-%, more preferably in the range from 9.0 to 18.0 wt.-%, most preferably in the range from 13.0 to 17.0 wt.-%, relative to the total weight of the polypropylene composition (PC).The inorganic filler has a DL / DSvalue, being the ratio of the median diameter (d50) determined according to ISO 13320-1 (laser) and the median diameter (d50) determined according to ISO 13317-3 (sedigraph), in the range from 1.5 to 4.5, more preferably in the range from 1.8 to 4.0, most preferably in the range from 2.0 to 3.5.The inorganic filler (F) preferably has a median diameter (d5o), determined according to ISO 13320-1 (laser), in the range from 3.0 to 10.0 pm, more preferably in the range from 4.0 to 8.5 pm, most preferably in the range from 4.5 to 7.0 pm.The inorganic filler (F) preferably has a top cut diameter (d95), determined according to ISO 13320-1 (laser), in the range from 8.0 to 30.0 pm, more preferably in the range from 9.0 to 25.0 pm, most preferably in the range from 10.0 to 20.0 pm.The inorganic filler (F) preferably has a median diameter (d50), determined according to ISO 13317-3 (sedigraph), in the range from 1.0 to 3.0 pm, more preferably in the range from 1.3 to 2.5 pm, most preferably in the range from 1.5 to 2.0 pm.The inorganic filler (F) preferably has a top cut diameter (CL95), determined according to ISO 13317-3 (sedigraph), in the range from 4.0 to 10.0 pm, more preferably in the range from 4.5 to 9.0 pm, most preferably in the range from 5.0 to 8.0 pm.It is preferred that the inorganic filler is selected from the group containing talc, calcium carbonate, barium sulfate, mica, and mixtures thereof.Most preferably, the inorganic filler (F) is talc.AdditivesThe further additives (A) are provided in an amount in the range from 0.2 to 5.0 wt.-%. The skilled practitioner would be able to select suitable additives that are well known in the art.The additives (A) are preferably selected from pigments, antioxidants, UV-stabilisers, antiscratch agents, mould release agents, acid scavengers, lubricants, anti-static agents, and mixtures thereof.It is understood that the content of additives (A), given with respect to the total weight of the polypropylene composition (PC), includes any carrier polymers used to introduce the additives to said polypropylene composition (PC), i.e. masterbatch carrier polymers. An example of such a carrier polymer would be a polypropylene homopolymer in the form of powder.ArticleIn another aspect, the present invention is directed to an article, preferably an injection- moulded article, comprising the polypropylene composition of the first aspect in an amount of at least 95 wt.-%, more preferably at least 98 wt.-%, most preferably at least 99 wt.-%.Preferably, the article, more preferably the injection-moulded article, is an automotive exterior article, more preferably selected from the group consisting of bumpers, side trims, step assists, body panels, and spoilers.E X A M P L E S1. Measurement methodsThe following definitions of terms and determination methods apply for the above general description of the invention including the claims as well as to the below examples unless otherwise defined.Quantification of microstructure by NMR spectroscopyQuantitative nuclear-magnetic resonance (NMR) spectroscopy was used to quantify the comonomer and regiodefect content of the polymers.Quantitative13C{1H} NMR spectra were recorded in the solution-state using a Bruker Avance III 400 NMR spectrometer operating at 400.15 and 100.62 MHz forand13C respectively. All spectra were recorded using a13C optimised 10 mm extended temperature probehead at 125 °C using nitrogen gas for all pneumatics. Approximately 200 mg of material was dissolved in approximately 3 ml of 7,2-tetrachloroethane-c / 2 (TCE-dj) along with chromium-(III)-acetylacetonate (Cr(acac)3) resulting in a 65 mM solution of relaxation agent in solvent {singh09}. To ensure a homogenous solution, after initial sample preparation in a heat block, the NMR tube was further heated in a rotatary oven for at least 1 hour. Upon insertion into the magnet the tube was spun at 10 Hz. This setup was chosen primarily for the high resolution and quantitatively needed for accurate ethylene content quantification. Standard single-pulse excitation was employed without NOE, using an optimised tip angle, 1 s recycle delay and a bi-level WALTZ 16 decoupling scheme {zhou07,busico07}. A total of 6144 (6k) transients were acquired per spectra.Quantitative ^CpH} NMR spectra were processed, integrated and relevant quantitative properties determined from the integrals using proprietary computer programs. All chemical shifts were indirectly referenced to the central methylene group of the ethylene block (EEE) at 30.00 ppm using the chemical shift of the solvent. This approach allowed comparable referencing even when this structural unit was not present.Characteristic signals corresponding to the incorporation of ethylene were observed {wangOO, cheng84, randall89}.The comonomer fraction was quantified using the method of Wang et. al. {wangOO} through integration of multiple signals across the whole spectral region in thel3C{'H} spectra. This method was chosen for its robust nature and ability to account for the presence of regiodefects when needed. Integral regions were slightly adjusted to increase applicability across the whole range of encountered comonomer contents.For systems where only isolated ethylene in PPEPP sequences was observed the method of Wang et. al. was modified to reduce the influence of non-zero integrals of sites that are known to be not present. This approach reduced the overestimation of ethylene content for such systems and was achieved by reduction of the number of sites used to determine the absolute ethylene content. Through the use of this set of sites the corresponding integral equation becomesPS = IA+ (0.5 * IB)PT=ID + IF + IDP = (Ps + PT) / 2 e = 0.5 * (IH+ (0.5 * IB)) fE = e / (e + p) using the same notation used in the article of Wang et. al. {wangOO}.The mole percent comonomer incorporation was calculated from the mole fraction:E [mol%] = 100 * IEThe weight percent comonomer incorporation was calculated from the mole fraction: E [wt%] = 100 * ( fE * 28.06 ) / ( (fE * 28.06) + ((1 -fE) * 42.08) )Characteristic signals corresponding to regio defects were observed {resconiOO, wangOO}. The presence of isolated 2,1-erythro regio defects was indicated by the presence of the two methyl sites at 17.7 and 17.2 ppm and confirmed by other characteristic sites. The presence of 2,1 regio defect adjacent an ethylene unit was indicated by the two inequivalent Sap signals at 34.9 ppm and 34.7 ppm respectively and the Tyy at 34.1 ppm.The amount of isolated 2,1-erythro regio defects (P2ieisolated) was quantified using the average integral of the two characteristic methyl sites at 17.7 (Ieg) and 17.4 (Ie6) ppm respectively: 121c isolated—( Ie6 + Ie8 ) / 2The amount of 2,1 regio defect adjacent to ethylene (PE21) was quantified using the methine site at 34.1 ppm (ITTY):PE21 ~ ITTYThe total amount of propene (Ptotai) was quantified based on the methyl region (Icm) between 23.0 and 19.9 ppm with correction undertaken for sites included in this region not related to propene insertion. The methyl group Pnresulting from 2,1 regio defect adjacent to ethylene is already present in ICH3:Ptotai—lcH3 + 2 * P21e isolatedThe isolated 2,1-erythro regio defects (P2ieisolated) is multiplied by 2 to take into account the two (2) propene units in the 2, 1-erythro regio defects.The mole percent of isolated 2,1-erythro regio defects was quantified with respect to all propene:[21 e] mol% = 100 * P2ieisolated / PtotaiThe mole percent of 2,1 regio defects adjacent to ethylene was quantified with respect to all propene:[E21] mol% = 100 * PE2i / PtotaiThe total amount of 2,1 defects was quantified as following:

[0021] mol% = [21e] + [E21]Characteristic signals corresponding to other types of regio defects (2,1-threo, 3,1 insertion) were not observed {resconiOO}. zhou07 Zhou, Z., Kuemmerle, R., Qiu, X., Redwine, D., Cong, R., Taha, A., Baugh, D. Winniford, B., J. Mag. Reson. 187 (2007) 225 busico07 Busico, V., Carbonniere, P., Cipullo, R., Pellecchia, R., Severn, J., Talarico, G., Macromol. Rapid Commun. 2007, 28, 1128 resconiOO Resconi, L., Cavallo, L., Fait, A., Piemontesi, F., Chem. Rev. 2000, 100, 1253 wangOO Wang, W-J., Zhu, S., Macromolecules 33 (2000), 1157 cheng84 Cheng, H. N., Macromolecules 17 (1984), 1950 singh09 Singh, G., Kothari, A., Gupta, V., Polymer Testing 28 5 (2009), 475 randall89 Randall, J. Macromol. Sci., Rev. Macromol. Chem. Phys. 1989, C29, 201.CRYSTEX QC analysisCrystalline and soluble fractions methodThe crystalline (CF) and soluble fractions (SF) of the polypropylene (PP) compositions as well as the comonomer content and intrinsic viscosities of the respective fractions were analysed by use of the CRYSTEX instrument, Polymer Char (Valencia, Spain). Details of the technique and the method can be found in literature (Ljiljana Jeremie, Andreas Albrecht, Martina Sandholzer & Markus Gahleitner (2020) Rapid characterization of high-impact ethylenepropylene copolymer composition by crystallization extraction separation: comparability to standard separation methods, International Journal of Polymer Analysis and Characterization, 25:8, 581-596)The crystalline and amorphous fractions are separated through temperature cycles of dissolution at 160 °C, crystallization at 40 °C and re-dissolution in 1,2,4-trichlorobenzene at 160 °C. Quantification of SF and CF and determination of ethylene content (C2) are achieved by means of an integrated infrared detector (IR4) and for the determination of the intrinsic viscosity (IV) an online 2-capillary viscometer is used.The IR4 detector is a multiple wavelength detector measuring JR absorbance at two different bands (CH3stretching vibration (centred at app. 2960 cm1) and the CH stretching vibration (2700-3000 cm1) that are serving for the determination of the concentration and the Ethylene content in Ethylene-Propylene copolymers. The IR4 detector is calibrated with series of 8 EP copolymers with known Ethylene content in the range of 2 wt.-% to 69 wt.-% (determined by13C-NMR) and each at various concentrations, in the range of 2 and 13mg / ml. To encounter for both features, concentration and ethylene content at the same time for various polymer concentrations expected during Crystex analyses the following calibration equations were applied:Cone = a + b*Abs(CH) + c*(Abs(CH))2+ d*Abs(CH3) + e*(Abs(CH3)2+ f*Abs(CH)*Abs(CH3) (Equation 1)CH3 / 1000C = a + b*Abs(CH) + c* Abs(CH3) + d * (Abs(CH3) / Abs(CH)) + e * (Abs(CH3) / Abs(CH))2(Equation 2)The constants a to e for equation 1 and a to f for equation 2 were determined by using least square regression analysis.The CH3 / 1000C is converted to the ethylene content in wt.-% using following relationship:Wt.-% (Ethylene in EP Copolymers) = 100 - CH3 / 1000TC * 0.3 (Equation 3)Amounts of Soluble Fraction (SF) and Crystalline Fraction (CF) are correlated through the XS calibration to the “Xylene Cold Soluble” (XCS) quantity and respectively Xylene Cold Insoluble (XCI) fractions, determined according to standard gravimetric method as per ISO16152. XS calibration is achieved by testing various EP copolymers with XS content in the range 2-31 wt.-%. The determined XS calibration is linear:Wt.-% XS = 1 ,01 * Wt.-% SF (Equation 4)Intrinsic viscosity (IV) of the parent EP copolymer and its soluble and crystalline fractions are determined with a use of an online 2-capillary viscometer and are correlated to corresponding IV’ s determined by standard method in decalin according to ISO 1628-3. Calibration is achieved with various EP PP copolymers with IV = 2-4 dL / g. The determined calibration curve is linear:IV (dL / g) = a* Vsp / c (equation 5)The samples to be analysed are weighed out in concentrations of lOmg / ml to 20mg / ml. To avoid injecting possible gels and / or polymers that do not dissolve in TCB at 160 °C, such as PET and PA, the weighed-out sample was packed into a stainless steel mesh MW 0, 077 / D 0,05mmm.After automated filling of the vial with 1,2,4-TCB containing 250 mg / 1 2,6-tert-butyl-4- methylphenol (BHT) as antioxidant, the sample is dissolved at 160 °C until complete dissolution is achieved, usually for 60 min, with constant stirring of 400rpm. To avoid sample degradation, the polymer solution is blanketed with the N2 atmosphere during dissolution.A defined volume of the sample solution is injected into the column filled with inert support where the crystallization of the sample and separation of the soluble fraction from the crystalline part is taking place. This process is repeated two times. During the first injection the whole sample is measured at high temperature, determining the IV[dl / g] and the C2[wt.%] of the PP composition. During the second injection the soluble fraction (at low temperature) and the crystalline fraction (at high temperature) with the crystallization cycle are measured (wt.-% SF, wt.-% C2, IV).Melt Flow RateThe melt flow rate (MFR) is determined according to ISO 1133 and is indicated in g / 10 min. The MFR is an indication of the flowability, and hence the processability, of the polymer. The higher the melt flow rate, the lower the viscosity of the polymer. The MFR2of polypropylene is determined at a temperature of 230 °C and a load of 2.16 kg.Density:The density is measured according to ISO 1183-187. Sample preparation is done by compression moulding in accordance with ISO 1872-2:2007.The xylene soluble fraction at room temperature (XCS, wt.-%): The amount of the polymer soluble in xylene is determined at 25 °C according to ISO 16152; 5thedition; 2005- 07-01.DSC analysis, melting temperature (Tm) and heat of fusion (Hf), crystallization temperature (Tc) and heat of crystallization (Hc): measured with a TA Instrument Q200 differential scanning calorimetry (DSC) on 5 to 7 mg samples. DSC is run according to ISO 11357 / part 3 / method C2 in a heat / cool / heat cycle with a scan rate of 10 °C / min in the temperature range of -30 to +225 °C. Crystallization temperature (Tc) and crystallization enthalpy (Hc) are determined from the cooling step, while melting temperature (Tm) and melting enthalpy (Hm) are determined from the second heating step.The Flexural Modulus is determined according to ISO 178 method A (3 -point bending test) on 80 mm x 10 mm x 4 mm specimens. Following the standard, a test speed of 2 mm / min and a span length of 16 times the thickness was used. The testing temperature was 23±2 ° C. Injection moulding was carried out according to ISO 19069-2 using a melt temperature of 230 °C for all materials irrespective of material melt flow rate.Notched impact strength (NIS)The Charpy notched impact strength (NIS) is measured according to ISO 179 leA at +23 °C or -20 °C, using injection moulded bar test specimens of 80x10x4 mm3prepared in accordance with ISO 19069-2 using a melt temperature of 230 °C for all materials irrespective of material melt flow rate.Average particle size (diameter) <Z5o and top cut < / 95The particle size definitions are calculated from the particle size distribution [mass percent] as determined by two different methods:Laser diffraction method, using Laser Mastersizer, according to ISO 13320-1.Sedigraph method, i.e. gravitational liquid sedimentation, according to ISO 13317-3.The d50is defined as the median diameter, whilst dgs is the diameter at the 95thpercentile, as observed from the particle size distribution.Inorganic residuesInorganic residues are quantified according to DIN ISO 1172:1996 using a Perkin Elmer TGA 8000. Approximately 10-20 mg of material was placed in a platinum pan. The temperature was equilibrated at 50 °C for 10 minutes, and afterwards raised to 950 °C under nitrogen at a heating rate of 20 °C / min. The ash content was evaluated as the weight % at 850 °C.Limonene detectionThe determination of limonene is based on a static headspace (HS) approach. This analysis uses a combination of a HS sampler with a gas chromatograph (GC) and a mass spectrometer (MS) for screening purposes.Samples were delivered to the lab in sealed aluminium-coated polyethylene (PE) bags. Prior to the analysis, samples were cryo-milled, a portion of 2.000 ± 0.100 g was weighed in a 20 ml HS vial and tightly closed. For every sample, a double determination was performed. HS / GC / MS parameters• HS parameters (Agilent G1888 Headspace Sampler)Vial equilibration time: 120 min (sample), 5 min (standard)Oven temperature: 100 °C (sample), 200 °C (standard)Loop temperature: 110 °C (sample), 205 °C (standard)Transfer line temperature: 120 °C (sample), 210 °C (standard)Low shaking• GC parameters (Agilent 7890A GC System)Column: ZB-WAX 7HG-G007-22(30 m x 250 pm x 1 pm)Carrier gas: Helium 5.0Flow: 2 ml / minSplit: 5:1GC oven program: 35 °C for 0.1 min10 °C / min until 250 °C250 °C for 1 min• MS parameters (Agilent 5975C inert XL MSD)Acquisition mode: ScanScan parameters:Low mass: 20High mass: 200Threshold: 10• Software / Data evaluationMSD ChemStation E.02.02.1431MassHunter GC / MS Acquisition B.07.05.2479AMDIS GC / MS Analysis Version 2.71 NIST / EPA / NIH Mass Spectral Library (2011 version) NIST Mass Spectral Search Program Version 2.0 g• AMDIS deconvolution parametersMinimum match factor: 80Threshold: LowScan direction: High to LowData file format: Agilent filesInstrument type: QuadrupoleComponent width: 20Adjacent peak subtraction: TwoResolution: HighSensitivity: Very highShape requirements: MediumSolvent tailing: 91 m / zColumn bleed: 207 m / zMin. model peaks: 2Min. S / N: 10Min. certain peaks: 0.5• MSD ChemStation integration parametersIntegrator: ChemStationInitial area reject: 0Initial peak width: 0.005Shoulder detection: offInitial threshold: 10.5In this study, the statement “below the limit of detection (< LOD)” describes a condition where either the match factor is below 80 (AMDIS) or the signal to noise ratio (Pk-pk S / N = Corrected signal / Pk-pk noise, MSD ChemStation signal to noise report) of the peak in the sample run is below 3. The results refer solely to the measured samples, time of measurement and the applied parameters.Standard solutionsFor a positive identification and comparison with the (lowest) odour detection thresholds (ODT), a limonene standard was used.For the HS / GC / MS analysis, 5 pl of the respective standard was injected in a 20 ml HS vial, tightly closed and measured.Assuming full vaporisation of the standard substance, the concentration limonene in the HS cGwas estimated as listed in Table 1.Table 1: Calibration standard and ODTData evaluationThe concentration of an analyte in the HS cGis calculated by considering the substance amount mg and the available HS volume V (Equation 1).Equation 1To estimate the concentration of an analyte in the HS above a polymer sample, the response factor, Rfoi a one-point calibration is required (Equation 2). By integrating the extracted ion chromatogram (EIC), the peak area is obtained for the analyte. The corresponding target ion is listed in Table 1. ^andardRf =Peak areastandardEquation 2The concentration of an analyte in the HS above a polymer sample, cGampleis calculated by multiplying the response factor with the EIC peak area of the sample (Equation 3).Peak areaSamp / eEquation 3Additionally, the odour relevance of an analyte in the HS above a polymer sample is estimated by the odour activity value (OAV). Therefore, the concentration of an analyte in the HS above a polymer sample is compared with the (lowest) odour detectionthreshold (ODT) found in literature (Equation 4) [1], A value above 1 indicates the relevance of an analyte to the odour at the given HS temperature.Equation 4Considerations and limitationsIt must be considered that the ODT for some substances is below the detection limit (LOD) of the method. Therefore, components below the LOD might be missed although still relevant to the overall odour.The OAV is based on the assumption that the HS parameters are somewhat relatable to the measurement conditions of an ODT determination. Of course, this is not fully applicable because temperature settings of 100 °C are not necessarily chosen for such experiments and have therefore limited practical value. Nevertheless, this approach can at least indicate the odour relevance of the defined marker substances.References[1] Van Gemert L. J., Odour Thresholds: Compilations of odour threshold values in air, water and other media, Utrecht, Oliemans Punter & Partners BV, 2011.CLTEThe coefficient of linear thermal expansion (CLTE) was determined in accordance with ISO 11359-2:1999 on 10 mm long pieces cut from the same injection moulded specimens as used for the flexural modulus determination. The measurement was performed in a temperature range from -30 to +80 °C at a heating rate of 1 °C / min and a temperature range from 23 to +80 °C at a heating rate of 1 °C / min in machine direction, respectively.Paint delaminationPaint Adhesion is characterized as the resistance of decorative coatings such as paints when subjected to high-pressure cleaner washing following certain conditions as described below. Injection moulded sample plates (150 mm x 80 mm x 3 mm) were produced at 240 °C melt temperature and 50 °C mould temperature. The flow front velocity was 100 mm / s. Prior coating, the plaques were cleaned with Zeller Gmelin Divinol® mm / s for 5 min.Subsequently, the surface was activated via flaming, where a burner at a speed of 670 mm / s spreads a mixture of propane (9 1 / min) and air (180 1 / min) in a ratio of 1 :20 on the polymer substrate. Afterwards, the polymer substrate was coated with 3 layers, i.e. a primer, base coat (black) and a clear coat. The step of flaming was performed two times.Black Paint Test ConditionsThe decorative coating was incised down to the substrate at a total depth of about 500 pm (including coating and substrate) with a cutting tool (cutter knife 9 mm) making a cross with 100 mm long branches and inclined towards the substrate at an angle of 30°. On each coated substrate, 3 lines with the corresponding cross were incised by hand. The incised area was further exposed to a steam of hot water with temperature T was directed for time t at distance d under angle a to the surface of the test panel. Pressure of the waterjet results from the water flow rate and is determined by the type of nozzle installed at the end of the water pipe. The following parameters were used:T (water) = 68 °C; t = 60 s; d = 130 mm, a = 90°, water pressure of 68 bar, nozzle type = Walter 13 / 32.Silver Paint Test ConditionsThe decorative coating was incised down to the substrate at a total depth of about 130 pm (including coating and substrate) with a cutting tool (Sikkens knife 1 mm) making a cross with 100 mm long branches and inclined towards the substrate at an angle of 90°. On each coated substrate, 3 lines with the corresponding cross were incised using automated device. The incised area was further exposed to a steam of hot water with temperature T was directed for time t at distance d under angle a to the surface of the test panel. Pressure of the waterjet results from the water flow rate and is determined by the type of nozzle installed at the end of the water pipe.The following parameters were used:T (water) = 60 °C; t = 60 s; d = 100 mm, a = 90°, water pressure of 68 bar, nozzle type = Walter 13 / 32.The adhesion in both cases was assessed by quantifying the failed or delaminated coated area in mm2per test line. For each example, 5 panels (150 mm x 80 mm x 3 mm) have been tested. For this purpose, an image of the test line before and after waterjet exposure was taken. Then the delaminated area was calculated with an image processing software. The average failed area for 3 test lines on 5 test specimens (i.e. in total the average of 15 test points) was reported as average failed area. SD is the standard deviation, which is determined according to the following formula:Sample standard deviation = E (x - x)2(n - 1) wherein: x are the observed values; x is the mean of the observed values; and n is the number of observations.2. Examples2.1 Synthesis of heterophasic propylene-ethylene copolymers (HECOs)Preparation of the catalyst for HECO1 and HECO2First, 0.1 mol of MgCl2x 3 EtOH was suspended under inert conditions in 250 ml of decane in a reactor at atmospheric pressure. The solution was cooled to the temperature of -15 °C and 300 ml of cold TiCU was added while maintaining the temperature at said level. Then, the temperature of the slurry was increased slowly to 20 °C. At this temperature, 0.02 mol of dioctylphthalate (DOP) was added to the slurry. After the addition of the phthalate, the temperature was raised to 135 °C during 90 minutes and the slurry was allowed to stand for 60 minutes. Then, another 300 ml of TiCU was added and the temperature was kept at 135 °C for 120 minutes. After this, the catalyst was filtered from the liquid and washed six times with 300 ml heptane at 80 °C. Then, the solid catalyst component was filtered and dried. Catalyst and its preparation concept is described in general e.g. in patent publications EP 491566, EP 591224 and EP 586390. The catalyst was further modified (VCH modification of the catalyst). 35 ml of mineral oil (Paraffinum Liquidum PL68) was added to a 125 ml stainless steel reactor followed by 0.82 g of triethyl aluminum (TEAL) and 0.33 g of dicyclopentyl dimethoxy silane (donor D) under inert conditions at room temperature. After 10 minutes 5.0 g of the catalyst prepared above (Ti content 1.4 wt.-%) was added and after additionally 20 minutes 5.0 g of vinylcyclohexane (VCH) was added. The temperature was increased to +60 °C during 30 minutes and was kept there for 20 hours. Finally, the temperature was decreased to +20 °C and the concentration of unreacted VCH in the oil / catalyst mixture was analysed and was found to be 200 ppm weightCatalyst for HECO3The catalyst used in the polymerisation processes was the commercial ZN180M of Basell with triethyl-aluminium (TEA) as co-catalyst and dicyclo pentyl dimethoxy silane (donor D) as donor.Preparation of the catalyst and polymerization for HEC04For the polymerization process of HECO4 a Ziegler-Natta type catalyst as used in for the inventive examples of WO2016 / 066446 Al and prepolymerized with vinylcyclohexane to achieve nucleation with poly(vinylcycloxehane) was used. Nucleation by prepolymerization with vinylcyclohexane is described in EP290256 Bl and EP2960279B1 in detail.The catalyst system defined above was used in combination with thriethyl-aluminium (TEAL) as co-catalyst and dicyclopenta dienyl-dimethoxy silane (Donor D) as external donor.The subsequent polymerization has been effected under the following conditions.Table 1 Polymerization conditions for the HECOsThe heterophasic copolymers HECO1, HECO2, HECO3 and HECO4 were compounded in a co-rotating twin-screw extruder Coperion ZSK 47 at 220 °C with 0.15 wt.-% antioxidant (Irganox B215FF from BASF AG, Germany; this is a l:2-mixture of Pentaerythrityl- tetrakis(3-(3’,5’-di-tert. butyl-4-hydroxyphenyl)-propionate, CAS-no. 6683-19-8, and Tris(2,4-di-t-butylphenyl) phosphite, CAS-no. 31570-04-4); 0.05 wt.-% of Ca-stearate (CAS- no.1592-23-0, commercially available from Faci, Italy).2.2 Mixed-plastic polypropylene blend (Bl)The mixed-plastic polypropylene blend (Bl) was obtained from a German post-consumer plastic waste stream, fulfilling the specification DSD324. This feedstock, provided in the form of bales, underwent a bale opening process and was then fed to a vibro-sieve separating over- (> 400 mm) and undersize (< 30 mm) fractions and then subjected to multiple sorting steps based on NIR and color in a cascade of 4 Tomra Autosort units. The generated high- quality fraction consisting of white PP material was then subjected to a hot caustic-soda (min. 0.5 wt.% NaOH, 80°C) washing line based on the Krones Metapure W design, followed by mechanical drying, thermal drying, windsifting, screening (material < 2mm is separated) and a two-step flake sorting using Tomra Autosort Flake units and subsequent extrusion. The properties of the mixed-plastic polypropylene blend (Bl) are given in Table 2.Table 2 Properties of mixed-plastic polypropylene blend (Bl)The mixed-plastic polypropylene blend (Bl) further comprises minor amounts of polystyrene, polyamide-6 and fatty acids. 2.3 Compounding of Inventive and Comparative CompositionsThe inventive and comparative compositions were prepared based on the recipes indicated in Table 3 by compounding in a co-rotating twin-screw extruder Coperion ZSK 40 at 220 °C. In addition to the HECOs and the mixed-plastic polypropylene blends described above, the following commercially available components were also employed:ECI an elastomeric ethylene-octene copolymer with a trade name ofQueo 8210, commercially available from Borealis AG, having an MFR.2 (190 °C) of 10 g / 10 min and a density of 883 kg / m3EC2 an elastomeric ethylene-butene copolymer with a trade name of Engage HM 7487, commercially available from Dow Chemicals (USA), having an MFR2(190 °C) of 0.27 g / 10 min and a density of 860 kg / m3.EC3 an elastomeric ethylene-octene copolymer with a trade name ofEngage 8842, commercially available from Dow Chemicals (USA), having an MFR2(190 °C) of 1.0 g / 10 min and a density of 857 kg / m3. h-PP a commercial propylene homopolymer HL712FB, commercially available from Borealis AG (Austria), having MFR2(230 °C) of 1200 g / lOmin and a Tm of 158 °C.F 1 talc with a trade name of Steamic T 1 CA, commercially available from Imerys (France), with median diameter d50of 1.8 pm and top cut diameter d95of 6.2 pm, as determined by Sedigraph analysis (ISO 13317-3), and median diameter d50of6.0 pm and top cut diameter d95of 14.7 pm, as determined by laser diffraction (ISO 13320-1), with a DL / DSof 3.33. talc with a trade name of Jetfine 3CA, commercially available from Imerys (France), with median diameter d50of 1.3 pm and top cut diameter d95of 3.9 pm, as determined by Sedigraph analysis (ISO 13317-3), and median diameter d50of 4.4 pm and top cut diameter d95of 9.9 pm, as determined by laser diffraction (ISO 13320-1), with a DL / DSof 3.38.F3 talc with a trade name of Luzenac HAR T84, commercially available from Imerys (France), with median diameter d50of 2.0 pm and top cut diameter d95of 11.3 pm, as determined by Sedigraph analysis (ISO 13317-3), and median diameter d50of 10.5 pm and top cut diameter d95of 34.2 pm, as determined by laser diffraction (ISO 13320-1), with a DL / DSof 5.25.Black MB a polyethylene based masterbatch CBMB LD-09 A02 from Borealis AG (Norway) containing 40 wt.-% of pigment,MB carrier a masterbatch carrier propylene homopolymer with a trade name of HC001 A, commercially available from Borealis AG (Austria).SAI Slip agent with a trade name of Finawax-O, commercially available from Fine Organics (India).SA2 Oleamide slip agent with a trade name of Crodamide OR (CAS-no. 301-02-0), commercially available from Croda Polymer Additives, UKGMS Glycerol monostearate with a trade name of GMS-90, commercially available from Sabo S.p.A (Italy).AO1 antioxidant with a trade name of Irganox 1010 (CAS-no. 6683- 19-8), commercially available from BASF AG (Germany).AO2 antioxidant with a trade name of Irganox 1076 (CAS-no. 2082- 79-3), commercially available from BASF AG (Germany).UV1 UV stabiliser with a trade name of Chimasorb 119, commercially available from BASF AG (Germany).UV2 UV stabiliser with a trade name of Sabostab UV228, commercially available from Sabo S.p.A (Italy).The properties of the inventive and comparative compositions are given in Table 4.Table 3 Recipes for inventive and comparative examplesCE1 and CE2 correspond to IE1 and IE2 of WO 2022 / 034127 Al, respectively, whilst CE3 to CE6 correspond to IE1 to IE4 of WO 2022 / 258578 Al, respectively. Table 4 Properties of the inventive and comparative compositions* - n.m. = not measuredAs can be seen from Table 4, the inventive example IE1, which contains HECO1, HECO2, ECI, Fl and Bl, as well as pigments / fiirther additives, has a drastically improved paint adhesion, wherein no delamination is observed for either black of silver paint. Furthermore, the mechanical properties are maintained on a good level, with the notched impact strength even being slightly improved over CE1 to CE6, despite the lower amount of elastomer component used in IE1.

Claims

C L A I M S1. A polypropylene composition (PC) being a mixed-plastic polypropylene blend, wherein the polypropylene composition (PC) has: a) a melt flow rate (MFR2), determined according to ISO 1133 at 230 °C and 2.16 kg, in the range from 1.0 to 30.0 g / 10 min; b) a silver paint delamination area, determined as defined in the measurement methods, in the range from 0.0 to 20.0 mm2; c) a black paint delamination area, determined as defined in the measurement methods, in the range from 0.0 to 20.0 mm2; d) a flexural modulus, determined according to ISO 178 using 80x10x4 mm3test bars injection-moulded in line with ISO 19069-2, in the range from 1000 to 2000 MPa; e) a limonene content, determined by solid phase microextraction (HS-SPME- GC-MS), in the range from 0.10 to 25.0 ppm; and f) a content of inorganic filler (F) in the range from 5.0 to 20.0 wt.-%, relative to the total weight of the polypropylene composition (PC), wherein the inorganic filler has a DL / DSvalue, being the ratio of the median diameter (d5o) determined according to ISO 13320-1 (laser) and the median diameter (d50) determined according to ISO 13317-3 (sedigraph), in the range from 1.5 to 4.5, wherein the soluble fraction (SF) content of the polymeric part of the polypropylene composition (PC), determined by CRYSTEX QC analysis, is in the range from 20.0 to 30.0 wt.-% and the crystalline fraction (CF) content of the polymeric part of the polypropylene composition (PC), determined by CRYSTEX QC analysis, is in the range from 70.0 to 80.0 wt.-%, with both contents expressed as a wt.-% relative to the total weight of the polymeric part of the polypropylene composition (PC), wherein the soluble fraction (SF) has an intrinsic viscosity (iV(SF)), determined by CRYSTEX QC analysis, in the range from 2.40 to 3.50 dL / g and the crystalline fraction (CF) has an ethylene content (C2(CF)), determined by CRYSTEX QC analysis, in the range from 4.0 to 10.0 wt.-%.

2. The polypropylene composition (PC) according to claim 1, wherein: the crystalline fraction (CF) of the polymeric part of the polypropylene composition (PC) has an intrinsic viscosity (iV(CF)), determined by CRYSTEX QC analysis, in the range from 1.00 to 2.50 dL / g; and / or the ratio of the intrinsic viscosity of the soluble and crystalline fractions, (iV(SF) / iV(CF)), determined by CRYSTEX QC analysis, is in the range from 1.00 to 3.00.

3. The polypropylene composition (PC) according to claim 1 or claim 2, wherein the soluble fraction (SF) has an ethylene content (C2(SF)), determined by CRYSTEX QC analysis, in the range from 30.0 to 60.0 wt.-%, and / or the ratio of the ethylene content of the soluble and crystalline fractions, (C2(SF) / C2(CF)), determined by CRYSTEX QC analysis, is in the range from 6.0 to 12.0.

4. The polypropylene composition (PC) according to any one of the preceding claims, having an ethylene content (C2(total)), determined by CRYSTEX QC analysis, in the range from 10.0 to 30.0 wt.-%.

5. The polypropylene composition (PC) according to any one of the preceding claims, having one or more, preferably all, of the following properties: a) a Charpy Notched impact strength at 23 °C, determined according to ISO 179 using 80x10x4 mm3test bars injection-moulded in line with ISO 19069-2, in the range from 40 to 100 kJ / m2; b) a Charpy Notched impact strength at -20 °C, determined according to ISO 179 using 80x10x4 mm3test bars injection-moulded in line with ISO 19069-2, in the range from 3.0 to 15 kJ / m2; and c) a coefficient of linear thermal expansion (CLTE) in the machine direction, determined according to ISO 11359-2, in the range from 0 to 100 xlO-6 / K.

6. The polypropylene composition (PC) according to any one of the preceding claims, wherein the inorganic filler (F) is talc, more preferably has one or more, preferably all, of the following properties: a) median diameter (d50), determined according to ISO 13320-1 (laser), in the range from 3.0 to 10.0 pm; b) a top cut diameter (CI95), determined according to ISO 13320-1 (laser), in the range from 8.0 to 30.0 pm; c) median diameter (d50), determined according to ISO 13317-3 (sedigraph), in the range from 1.0 to 3.0 pm; and d) a top cut diameter (d95), determined according to ISO 13317-3 (sedigraph), in the range from 4.0 to 10.0 pm.

7. The polypropylene composition (PC) according to any one of the preceding claims, being obtainable by blending at least components a) to f): a) from 30.0 to 50.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a first heterophasic propylene-ethylene copolymer (HECO1) having an ethylene content (C2(total)), determined by CRYSTEX QC analysis, in the range from 8.1 to 20.0 wt.-%; b) from 5.0 to 15.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a second heterophasic propylene-ethylene copolymer (HECO2) having an ethylene content (C2(total)), determined by CRYSTEX QC analysis, in the range from 3.0 to 8.0 wt.-%; c) from 20.0 to 30.0 wt.-%, relative to the total weight of the polypropylene composition (PC), of a mixed-plastic polypropylene blend (B) having a melt flow rate (MFR2), determined according to ISO 1133 at 230 °C and 2.16 kg, in the range from 10 to 50 g / 10 min; d) from 2.0 to 10.0 wt.-% of an ethylene-octene elastomer (EC); e) from 5.0 to 20.0 wt.-% of the inorganic filler (F); f) from 0.2 to 5.0 wt.-% of further additives (A),wherein the total contents of components a) to f) add up to at least 95 wt.-%, more preferably at least 98 wt.-%, most preferably 100 wt.-%, relative to the total weight of the polypropylene composition (PC).

8. The polypropylene composition (PC) according to claim 7, wherein the first heterophasic propylene-ethylene copolymer (HECO1) has one or more, preferably all, of the following properties: a) a melt flow rate (MFR2), determined according to ISO 1133 at 230 °C and 2.16 kg, in the range from 1.0 to 50 g / 10 min; b) a soluble fraction (SF) content, determined by CRYSTEX QC analysis, in the range from 20.0 to 40.0 wt.-% and a crystalline fraction (CF) content, determined by CRYSTEX QC analysis, in the range from 60.0 to 80.0 wt.- %; c) an ethylene content of the soluble fraction (C2(SF)), determined by CRYSTEX QC analysis, in the range from 25 to 45 wt.-%; d) an ethylene content of the crystalline fraction (C2(CF)), determined by CRYSTEX QC analysis, in the range from 1.0 to 8.0 wt.-%; e) an intrinsic viscosity of the soluble fraction (iV(SF)), determined by CRYSTEX QC analysis, in the range from 2.00 to 4.00 dL / g; f) an intrinsic viscosity of the crystalline fraction (iV(CF)), determined by CRYSTEX QC analysis, in the range from 1.10 to 2.00 dL / g; and g) an intrinsic viscosity ratio (iV(SF) / iV(CF)), determined by CRYSTEX QC analysis, in the range from 1.20 to 4.00.

9. The polypropylene composition (PC) according to claim 7 or claim 8, wherein the second heterophasic propylene-ethylene copolymer (HECO2) has one or more, preferably all, of the following properties: a) a melt flow rate (MFR2), determined according to ISO 1133 at 230 °C and 2.16 kg, in the range from 1.0 to 15.0 g / 10 min; b) a soluble fraction (SF) content, determined by CRYSTEX QC analysis, in the range from 10.0 to 30.0 wt.-% and a crystalline fraction (CF) content,determined by CRYSTEX QC analysis, in the range from 70.0 to 90.0 wt.- %; c) an ethylene content of the soluble fraction (C2(SF)), determined by CRYSTEX QC analysis, in the range from 10 to 30 wt.-%; d) an ethylene content of the crystalline fraction (C2(CF)), determined by CRYSTEX QC analysis, in the range from 0.0 to 5.0 wt.-%; e) an intrinsic viscosity of the soluble fraction (iV(SF)), determined by CRYSTEX QC analysis, in the range from 3.00 to 7.00 dL / g; f) an intrinsic viscosity of the crystalline fraction (iV(CF)), determined by CRYSTEX QC analysis, in the range from 1.40 to 2.70 dL / g; and g) an intrinsic viscosity ratio (iV(SF) / iV(CF)), determined by CRYSTEX QC analysis, in the range from 2.00 to 5.00.

10. The polypropylene composition (PC) according to any one of claims 7 to 9, wherein the ethylene-octene elastomer (EC) has a melt flow rate (MFR2), determined according to ISO 1133 at 190 °C and 2.16 kg, in the range from 2.0 to 20 g / 10 min and / or a density, determined according to ISO 1183-187, in the range from 870 to 900 kg / m3.

11. The polypropylene composition (PC) according to any one of claims 7 to 10, wherein the mixed-plastic polypropylene blend (B) has one or more, preferably all, of the following properties: a) an ethylene content (C2(total)), determined by CRYSTEX QC analysis, in the range from 2.5 to 10.0 wt.-%; b) a soluble fraction (SF) content in the range from 4.0 to 15.0 wt.-% and a crystalline fraction (CF) in the range from 85.0 to 96.0 wt.-%, both determined by CRYSTEX QC analysis; c) an ethylene content of the crystalline fraction (C2(CF)), determined by CRYSTEX QC analysis, in the range from 1.0 to 8.0 wt.-%; d) an ethylene content of the soluble fraction (C2(SF)), determined by CRYSTEX QC analysis, in the range from 20 to 50 wt.-%;e) an intrinsic viscosity of the crystalline fraction (iV(CF)), determined by CRYSTEX QC analysis, in the range from 1.00 to 2.20 dL / g; f) an intrinsic viscosity of the soluble fraction (iV(SF)), determined by CRYSTEX QC analysis, in the range from 1.00 to 2.20 dL / g; g) an inorganic residue content, as determined by calcination analysis according to DIN ISO 1172:1996, of 0.05 to 5.0 wt.-%; h) a limonene content, determined by solid phase microextraction (HS-SPME- GC-MS), in the range from 0.10 to 25.0 ppm; and i) a density, determined according to ISO 1183-187, in the range from 890 to 950 kg / m3.

12. The polypropylene composition (PC) according to any one of claims 7 to 11, wherein the mixed-plastic polypropylene blend (B) has: a) a Charpy Notched impact strength at 23 °C, determined according to ISO 179 using 80x10x4 mm3test bars injection-moulded in line with ISO 19069- 2, in the range from 1.0 to 20.0 kJ / m2; and / or b) a flexural modulus, determined according to ISO 178 using 80x10x4 mm3test bars injection-moulded in line with ISO 19069-2, in the range from 1000 to 1600 MPa.

13. The polypropylene composition (PC) according to any one of claims 7 to 12, wherein the mixed-plastic polypropylene blend (B) originates from post-consumer waste.

14. The polypropylene composition (PC) according to any one of claims 7 to 13, wherein the mixed-plastic polypropylene blend (B) comprises one or more of polystyrene, polyamide-6 and fatty acids.

15. An article, preferably an injection-moulded article, comprising the polypropylene composition according to any one of the preceding claims in an amount of at least 95 wt.-%, more preferably at least 98 wt.-%, most preferably at least 99 wt.-%.

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