Polyolefin composition comprising a polypropylene polymer and a recycled plastic material

Abstract

The present invention relates to a polyolefin composition comprising: a) at least one heterophasic polypropylene copolymer having a melt flow rate MFR2 (230 °C, 2.16 kg, measured according to ISO 1133) of at least 40 g / 10 min, preferably at least 60 g / 10 min; b) at least one polypropylene homopolymer having a melt flow rate MFR2 (230 °C, 2.16 kg, measured according to ISO 1133) of at least 400 g / 10 min; and c) a blend (A) of a recycled plastic material comprising polypropylene and polyethylene in a ratio of 3:7 to 12:1, said blend (A) being recycled from waste plastic material derived from post-consumer waste and / or post-industrial waste, said blend (A) having a melt flow rate MFR2 (230 °C, 2.16 kg, measured according to ISO 1133) of at least 5 g / 10 min, wherein the polyolefin composition is characterized by a melt flow rate MFR2 (230 °C, 2.16 kg, measured according to ISO 1133) of at least 20 g / 10 min.

Description

[0001] This invention relates to polyolefin compositions comprising at least one multiphase polypropylene copolymer, at least one polypropylene homopolymer, and recycled plastic material, articles comprising said polyolefin compositions, and methods for preparing such polyolefin compositions.

[0002] describe

[0003] Polyolefins, particularly polyethylene and polypropylene, are increasingly being consumed in large quantities across a wide range of applications, including packaging for food and other items, fibers, automotive components, and a wide variety of manufactured articles. Given the enormous volume of waste collected compared to the amount recycled back into the stream, intelligent reuse of plastic waste streams and mechanical recycling of plastic waste still hold great potential.

[0004] A major trend in the polyolefin sector is the use of recycled materials from a wide variety of sources. Durable goods streams, such as those from yellow bags, yellow bins, community collections, waste electrical equipment (WEE), or end-of-life vehicles (ELVs), contain a wide variety of plastics. These materials can be processed to recycle acrylonitrile-butadiene-styrene (ABS), high-impact polystyrene (HIPS), polypropylene (PP), and polyethylene (PE) plastics. Separation can be achieved using density separation in water followed by further separation based on fluorescence, near-infrared absorption, or Raman fluorescence. However, it is often difficult to obtain pure recycled polypropylene or pure recycled polyethylene.

[0005] Typically, large quantities of recycled polypropylene on the market are mixtures of polypropylene (PP) and polyethylene (PE), especially in post-consumer waste streams. Furthermore, commercially recycled materials from post-consumer waste sources are routinely cross-contaminated with non-polyolefin materials (such as polyethylene terephthalate, polyamide, and polystyrene) or non-polymer materials (such as wood, paper, glass, or aluminum). This cross-contamination severely limits the end-use of the recycled stream, leaving no beneficial final applications. Polyolefin recycled materials, especially those from post-consumer waste streams, are mixtures of PE and PP. The better the quality of the recycled material, the less available it is, and the more expensive it is.

[0006] Compared to virgin materials, the quality issues of recycled materials can be overcome to some extent by mixing them with virgin polymers.

[0007] Compositions containing virgin polymers (i.e., polymers used for the first time) and recycled blended plastics were investigated.

[0008] EP 0575465 B1 covers a polymer blend composition comprising: (a) 30% to 70% by weight of a low-melt polymer comprising an ethylene / α-olefin copolymer, said low-melt polymer having a melting point of 0.88 g / cm³. 3 Up to 0.915 g / cm 3 The density, MFR of 1.5 dg / min to 7.5 dg / min, molecular weight distribution not greater than 3.5, compositional distribution width index greater than 70%, and substantially single melting point in the range of 60°C to 115°C as measured by DSC peak Tm; and (b) 70 wt% to 30 wt% of a propylene-based polymer having 88 mol% to 100 mol% propylene and 12 mol% to 0 mol% α-olefins other than propylene.

[0009] US 5266392 A claims protection for a polyethylene / polypropylene blend comprising: ≥50 wt% crystalline polypropylene; at least about 10 wt% linear low-density polyethylene with a density of about 0.915 to about 0.94 dispersed in the polypropylene matrix; and a certain amount of an ethylene / α-olefin plastomer compatibilizer having an α-olefin content of about 5 mol% to about 25 mol%, a melt index of about 50 dg / min or more, a weight-average molecular weight of about 5000 to about 50000, and about 0.88 g / cm³. 3 To approximately 0.90 g / cm 3 The density and at least 10% X-ray crystallinity. This covers the use of plasmons as compatibilizers in a very common manner, including recycled plasmons. Only fairly low and fairly high densities are excluded for plasmons, but pure HDPE is also excluded.

[0010] WO 2015169690 A1 relates to polypropylene-polyethylene blends comprising: (A) 75% to 90% by weight of the following blend: (A-1) 30% to 70% by weight of polypropylene and (A-2) 70% to 30% by weight of polyethylene; and (B) 10% to 25% by weight of a compatibilizer for a multiphase polyolefin composition comprising (B-1) 55% to 90% by weight of MFR2 at 1.0 g / 10 min to 300 g / 10 min (according to ISO). 1133) A copolymer of polypropylene (at 230°C and 2.16 kg load) and (B-2) 45 wt% to 10 wt% ethylene and propylene or C4 to C10 α-olefins, said copolymer having a glass transition temperature Tg (measured with DMTA) below -25°C and an intrinsic viscosity of at least 3.0 dl / g (measured in decahydronaphthalene at 135°C), said blend having (i) a Charpy notched impact strength (measured at 23°C according to ISO 179-1eA) at least 2% higher than that of the same blend without compatibilizer (B), and simultaneously (ii) a flexural modulus (measured at 23°C) at least 3% higher than that of the same blend without compatibilizer (B). 178), and additionally (iii) heat deformation resistance (determined by DMTA) at a temperature (T(G'=40MPa)) at which the storage modulus G' reaches 40MPa is at least 4°C higher than that of the same blend without compatibilizer (B).

[0011] EP 3 165 473A1 relates to a polyolefin composition comprising: a blend of recycled polypropylene and recycled polyethylene (A), polypropylene with an MFR of not less than 50 g / 10 min, and a compatibilizer for the multiphase polyolefin composition, wherein the MFR of the whole composition is greater than 25 g / 10 min.

[0012] WO 2020 / 070176 A1 relates to polyolefin compositions comprising recycled polyolefins and suitable for higher value products. The compositions comprise a propylene homopolymer with an MFR of at least 400 g / 10 min.

[0013] However, known polymer compositions containing recycled materials are not suitable for high-end markets; instead, currently available recycled compositions are targeted at low-end applications such as crates, flower pots, and workbenches. Due to the mechanical properties of currently available recycled compositions, they cannot compete with virgin materials.

[0014] To serve high-end markets such as high-flow-rate applications and to compete with virgin materials (especially in non-food and non-healthcare product sectors), certain adjustments are necessary. Currently available recyclables face major challenges related to composition (e.g., fluctuations in PP and PE content), consistency (flow properties), characteristic features (poor hardness-impact balance), and cross-contamination (e.g., non-polyolefin components, inorganic materials such as aluminum or paper), but also issues with color and odor. In particular, a suitable melt flow rate is desirable for high-flow-rate applications.

[0015] Furthermore, prior art polymer compositions containing recycled materials comprise a primary multiphase impact copolymer (or multiphase polypropylene copolymer) or random copolymer as the virgin polymer. These polymers contain an EPR phase. Additionally, the long-term stability of prior art materials may be poor, making them unsuitable for further reprocessing or recycling.

[0016] Therefore, one object of the present invention is to provide a polyolefin composition comprising polyolefin material recycled from waste plastic materials that does not have the disadvantages of polymer compositions according to the prior art. In particular, there is an urgent need for composite solutions that combine virgin materials with recycled materials to balance the above-mentioned problems and provide the market with advanced material products.

[0017] This objective is achieved by providing a polyolefin composition comprising the following:

[0018] a) 20% to 48% by weight of at least one multiphase polypropylene copolymer, wherein the melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of the at least one multiphase polypropylene copolymer is at least 40 g / 10 min, preferably at least 60 g / 10 min.

[0019] b) 2% to 30% by weight of at least one polypropylene homopolymer, wherein the melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of said at least one polypropylene homopolymer is at least 400 g / 10 min; and

[0020] c) A blend (A) of 40% to 60% by weight of recycled plastic material comprising polypropylene and polyethylene in a ratio of 3:7 to 12:1, said blend (A) being recycled from waste plastic material derived from post-consumer and / or post-industrial waste, said blend (A) having a melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of at least 5 g / 10 min.

[0021] The melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of the polyolefin composition is at least 20 g / 10 min, preferably at least 25 g / 10 min.

[0022] As discussed in further detail below, the melt flow rates of the polyolefin compositions of the present invention can cover a wide range and can be adjusted according to consumer needs. Melt flow rate is an important indicator of flow in the mold. Variations in melt flow rate affect the conversion interface and end-use performance. By providing polyolefin compositions with different melt flow rates, consumer needs can be met.

[0023] The polyolefin composition of the present invention combines a virgin, high-flowability multiphase PP material as an impact reinforcing agent with a homopolymer PP material as a melt flow rate enhancing agent for use in recycled PP / PE materials. This allows polyolefin compositions with a large amount of recycled material to be used in current applications in the fields of hoods and closures as well as packaging (e.g., lids), particularly thin-walled packaging applications.

[0024] For the purposes of this specification and the appended claims, the term "recycled" is used to indicate the recovery of materials from post-consumer waste and / or post-industrial waste. That is, post-consumer waste refers to objects that have completed at least one first use cycle (or life cycle), i.e., have experienced their first purpose and have passed through the hands of a consumer; while post-industrial waste refers to manufacturing waste that typically does not reach consumers. In the spirit of this invention, based on the total weight of the recycled polymer, the "recycled polymer" may also contain up to 17% by weight, preferably up to 3% by weight, more preferably up to 1% by weight, and even more preferably up to 0.1% by weight of other components derived from the first use. The type and amount of these components affect the physical properties of the recycled polymer. The physical properties given below relate to the main components of the recycled polymer.

[0025] As further described below, other typical components derived from the first use include thermoplastic polymers (such as polystyrene and PA6), talc, chalk, ink, wood, paper, limonene, and fatty acids. The content of polystyrene (PS) and polyamide 6 (PA6) in the recycled polymer can be determined by Fourier transform infrared spectroscopy (FTIR), and the content of talc, chalk, wood, and paper can be measured by thermogravimetric analysis (TGA).

[0026] The term "virgin" refers to newly produced materials and / or objects that are not recycled before their first use. Unless otherwise specified, a polymer is referred to as a "virgin" polymer.

[0027] The total amount of all virgin polypropylene polymers (homogeneous and multiphase polymers) used in the polyolefin compositions of the present invention can be added together in the range of 22% to 73% by weight, preferably 30% to 65% by weight, and more preferably 38% to 55% by weight (based on the total weight of the polymer composition).

[0028] The amount of the blend (A) containing recycled plastic material of polypropylene and polyethylene in a ratio of 3:7 to 12:1 used in the polyolefin composition of the present invention can be in the range of 40% to 60% by weight, preferably 45% to 55% by weight, more preferably 50% to 55% by weight (based on the total weight of the polymer composition), said blend (A) being recycled from waste plastic material derived from post-consumer waste and / or post-industrial waste.

[0029] It should be understood that the polyolefin composition may also contain additional additives, and in each of the embodiments described herein, the sum of all components is always 100% by weight.

[0030] According to one embodiment, the polyolefin composition of the present invention comprises:

[0031] a) 25% to 45% by weight, more preferably 28% to 35% by weight, of at least one multiphase polypropylene copolymer;

[0032] b) 5% to 27% by weight, more preferably 10% to 25% by weight, of at least one polypropylene homopolymer; and

[0033] c) 45% to 55% by weight, more preferably 50% to 55% by weight, of a blend (A) comprising recycled plastic materials of polypropylene and polyethylene.

[0034] And other additives, wherein the sum of all ingredients is always 100% by weight.

[0035] In another embodiment, the polyolefin composition of the present invention comprises:

[0036] a) 20% to 40% by weight, preferably 25% to 35% by weight, more preferably 28% to 32% by weight of at least one multiphase polypropylene copolymer;

[0037] b) 10% to 30% by weight, preferably 12% to 27% by weight, more preferably 15% to 25% by weight of at least one polypropylene homopolymer; and

[0038] c) A blend of 40% to 60% by weight, preferably 50% to 55% by weight, of recycled plastic materials comprising polypropylene and polyethylene (A).

[0039] And other additives, wherein the sum of all ingredients is always 100% by weight.

[0040] The melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of the polyolefin composition described above can be at least 50 g / 10 min, preferably at least 60 g / 10 min, particularly in the range of 50 g / 10 min to 80 g / 10 min, preferably 55 g / 10 min to 75 g / 10 min, and more preferably 60 g / 10 min to 72 g / 10 min. Therefore, the melt flow rate of the final polyolefin composition can be adjusted according to the ratio of different polymer components.

[0041] In another embodiment, the polyolefin composition of the present invention comprises:

[0042] a) 35% to 48% by weight, preferably 40% to 48% by weight, more preferably 45% to 48% by weight of at least one multiphase polypropylene copolymer;

[0043] b) 2% to 10% by weight, preferably 2% to 5% by weight, more preferably 2% to 3% by weight of at least one polypropylene homopolymer; and

[0044] c) A blend of recycled plastic materials comprising polypropylene and polyethylene, comprising 40% to 60% by weight, preferably 50% to 55% by weight (A).

[0045] And other additives, wherein the sum of all ingredients is always 100% by weight.

[0046] The melt flow rate (MFR2) of such polyolefin compositions (230°C, 2.16 kg, measured according to ISO 1133) is at least 20 g / 10 min, preferably at least 25 g / 10 min, more preferably at least 30 g / 10 min, particularly in the range of 20 g / 10 min to 50 g / 10 min, preferably 25 g / 10 min to 45 g / 10 min, more preferably 27 g / 10 min to 42 g / 10 min.

[0047] In another embodiment, the tensile modulus (ISO 527-2) of the polyolefin composition of the present invention is at least 1200 MPa, preferably at least 1300 MPa, more preferably at least 1400 MPa, particularly in the range of 1200 MPa to 1500 MPa, and more particularly 1300 MPa to 1400 MPa.

[0048] In yet another embodiment, the impact strength (ISO 179, Charpy 1eA + 23°C) of the polyolefin composition of the present invention is at least 4 kJ / m. 2 Preferably at least 5 kJ / m 2 More preferably at least 6 kJ / m 2 And even more preferably at least 7 kJ / m 2 Especially at 4kJ / m 2 Up to 8kJ / m 2 More notably, 4.2 kJ / m 2 Up to 7.7 kJ / m 2 Even more remarkably, 4.8 kJ / m 2 Up to 7kJ / m 2 And most notably, 5.4 kJ / m 2 Up to 6.6 kJ / m 2 Within the range.

[0049] In another embodiment, the puncture energy (ISO 6603-2, 4.4 m / s, 2 mm, 23°C) of the polyolefin composition of the present invention is at least 1.5 J, preferably at least 2 J, more preferably at least 3 J, even more preferably at least 4 J, particularly in the range of 1.5 J to 15 J, more particularly 2 J to 12 J, and even more particularly 5 J to 10 J.

[0050] Multiphase polypropylene virgin polymer

[0051] The multiphase polypropylene copolymer comprises a polypropylene matrix (M) and an elastomeric copolymer (E) as polymer components. The polypropylene matrix (M) is preferably a random propylene copolymer or a propylene homopolymer, particularly the latter. The elastomeric copolymer (E) comprises units derived from propylene and ethylene and / or C4 to C20 α-olefins, more preferably from ethylene and / or C4 to C10 α-olefins, most preferably from ethylene, C4 α-olefins, C6 α-olefins and / or C8 α-olefins (e.g., ethylene), and optionally from conjugated dienes.

[0052] In one embodiment, at least one multiphase polypropylene polymer a) used in the polyolefin composition of the present invention is selected from the group consisting of:

[0053] - At least one multiphase polypropylene copolymer (PPHeco-1) with a melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) in the range of 80 g / 10 min to 120 g / 10 min, preferably 90 g / 10 min to 110 g / 10 min, more preferably 100 g / 10 min to 105 g / 10 min; and

[0054] - At least one multiphase polypropylene copolymer (PPHeco-2) with a melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) in the range of 60 g / 10 min to 90 g / 10 min, more preferably 70 g / 10 min to 80 g / 10 min.

[0055] It should be understood that the polyolefin composition of the present invention may contain not only one, but also two multiphase virgin polypropylene copolymers with different melt flow rates. This allows for the adjustment of the melt flow rate of the final polyolefin composition.

[0056] Multiphase polypropylene copolymer (PPHeco-1):

[0057] The melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of at least one multiphase polypropylene copolymer (PPHeco-1) is in the range of 80 g / 10 min to 120 g / 10 min, preferably 90 g / 10 min to 110 g / 10 min, and more preferably 100 g / 10 min to 105 g / 10 min.

[0058] Based on the total weight of the multiphase propylene copolymer, the content of the soluble fraction (SF) of the multiphase propylene copolymer (PPHeco-1) of the present invention, as determined by CRYSTEX analysis, is in the range of 10.0 wt% to 25.0 wt%, preferably 15.0 wt% to 20.0 wt%.

[0059] Soluble fraction (SF) of multiphase propylene copolymer (PPHeco-1) as shown by 13 The ethylene content (C2(SF)) determined by quantitative FT-IR spectroscopy calibrated by C-NMR spectrum is in the range of 15.0 wt% to 35.0 wt%, preferably in the range of 20.0 wt% to 32.0 wt%, and more preferably in the range of 25.0 wt% to 30.0 wt%.

[0060] The intrinsic viscosity (iV(SF)) of the soluble fraction (SF) of the multiphase propylene copolymer (PPHeco-1) is not greater than 4.5 dl / g, preferably not greater than 3.5 dl / g, for example in the range of 2.0 dl / g to 4.5 dl / g, and preferably in the range of 2.7 dl / g to 3.5 dl / g, for example 3.0 dl / g.

[0061] Multiphase propylene copolymer (PPHeco-1) as through 13The total ethylene (C2) content determined by quantitative FT-IR spectroscopy calibrated by C-NMR spectrum is 1.0 wt% to 15.0 wt%, more preferably 5 wt% to 10.0 wt%, and most preferably 7.0 wt% to 9.0 wt%.

[0062] The notched Charpy impact strength (NIS) of the multiphase polypropylene copolymer (PPHeco-1), measured at 23°C according to ISO 179-1eA, can be at least 4 kJ / m. 2 Preferably at least 5 kJ / m 2 For example, at 4kJ / m 2 Up to 7kJ / m 2 Within the range, preferably within 4 kJ / m 2 Up to 6kJ / m 2 Within the range, for example, 4 kJ / m 2 or 5kJ / m 2 The tensile modulus of the multiphase polypropylene copolymer (PPHeco-1), as measured according to ISO 178, can be at least 1000 MPa, preferably at least 1400 MPa, for example in the range of 1000 MPa to 2000 MPa, preferably in the range of 1300 MPa to 1800 MPa, for example 1400 MPa or 1500 MPa.

[0063] Multiphase polypropylene copolymer (PPHeco-2):

[0064] The melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of at least one multiphase polypropylene copolymer (PPHeco-2) is in the range of 60 g / 10 min to 90 g / 10 min, more preferably 70 g / 10 min to 80 g / 10 min.

[0065] Based on the total weight of the multiphase propylene copolymer, the content of the soluble fraction (SF) of the multiphase propylene copolymer (PPHeco-2) of the present invention, as determined by CRYSTEX analysis, is in the range of 10.0% to 20.0% by weight, preferably 15.0% to 18.0% by weight.

[0066] Soluble fraction (SF) of multiphase propylene copolymer (PPHeco-2) as shown by 13 The ethylene content (C2(SF)) determined by quantitative FT-IR spectroscopy calibrated by C-NMR spectrum is in the range of 15.0 wt% to 35.0 wt%, preferably in the range of 20.0 wt% to 32.0 wt%, and more preferably in the range of 25.0 wt% to 30.0 wt%.

[0067] The intrinsic viscosity (iV(SF)) of the soluble fraction (SF) of the multiphase propylene copolymer (PPHeco-2) is not greater than 4.5 dl / g, preferably not greater than 3.5 dl / g, for example in the range of 2.0 dl / g to 4.5 dl / g, more preferably in the range of 2.5 dl / g to 3.5 dl / g, and more preferably in the range of 2.5 dl / g to 3.0 dl / g, for example 2.6 dl / g to 2.7 dl / g.

[0068] Multiphase propylene copolymer (PPHeco-2) as through 13 The total ethylene (C2) content determined by quantitative FT-IR spectroscopy calibrated by C-NMR spectrum is 1.0 wt% to 15.0 wt%, more preferably 5 wt% to 10.0 wt%, and most preferably 6.0 wt% to 8.0 wt%.

[0069] The notched Charpy impact strength (NIS) of the multiphase polypropylene copolymer (PPHeco-2), measured at 23°C according to ISO 179-1eA, can be at least 4 kJ / m. 2 Preferably at least 5 kJ / m 2 For example, at 4kJ / m 2 Up to 7kJ / m 2 Within the range, preferably within 5 kJ / m 2 Up to 6kJ / m 2 Within the range, for example, 5 kJ / m 2 The tensile modulus of the multiphase polypropylene copolymer (PPHeco-2), as measured according to ISO 178, can be at least 1000 MPa, preferably at least 1400 MPa, for example in the range of 1000 MPa to 2000 MPa, preferably in the range of 1300 MPa to 1800 MPa, for example 1500 MPa.

[0070] virgin polypropylene homopolymer

[0071] The polypropylene homopolymer b) used as the primary polymer in the polyolefin composition of the present invention is selected from the group consisting of:

[0072] - At least one polypropylene homopolymer (PPH-1) with a melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) in the range of 600 g / 10 min to 1000 g / 10 min, preferably 700 g / 10 min to 900 g / 10 min, more preferably 800 g / 10 min to 850 g / 10 min;

[0073] - At least one polypropylene homopolymer (PPH-2) with a melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) in the range of 1000 g / 10 min to 1500 g / 10 min, preferably 1100 g / 10 min to 1300 g / 10 min, more preferably 1200 g / 10 min to 1250 g / 10 min;

[0074] - At least one polypropylene homopolymer (PPH-3) with a melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) in the range of 1700 g / 10 min to 2300 g / 10 min, preferably 1800 g / 10 min to 2200 g / 10 min, more preferably 2000 g / 10 min to 2100 g / 10 min;

[0075] - A melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) in the range of 400 g / 10 min to 500 g / 10 min, preferably 420 g / 10 min to 480 g / 10 min, for example 450 g / 10 min for at least one polypropylene homopolymer (PPH-4).

[0076] It should be understood that the polyolefin compositions of the present invention may contain not only one, but two or more, polypropylene virgin homopolymers with different melt flow rates. This allows for adjustment of the melt flow rate of the final polyolefin composition.

[0077] The properties and characteristics of different polypropylene homopolymers that can be used in the polyolefin compositions of the present invention are described below.

[0078] Polypropylene homopolymer (PPH-1):

[0079] The melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of at least one polypropylene homopolymer (PPH-1) is in the range of 600 g / 10 min to 1000 g / 10 min, preferably 700 g / 10 min to 900 g / 10 min, and preferably 800 g / 10 min to 850 g / 10 min.

[0080] The melting temperature of the polypropylene homopolymer (PPH-1) is at least 140°C, preferably at least 150°C, and more preferably in the range of 150°C to 160°C, for example, 158°C.

[0081] Polypropylene homopolymer (PPH-2):

[0082] The melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of at least one polypropylene homopolymer (PPH-2) is in the range of 1000 g / 10 min to 1500 g / 10 min, preferably 1100 g / 10 min to 1300 g / 10 min, and more preferably 1200 g / 10 min to 1250 g / 10 min.

[0083] The melting temperature of the polypropylene homopolymer (PPH-2) is at least 140°C, preferably at least 150°C, and more preferably in the range of 150°C to 160°C, for example, 158°C.

[0084] Polypropylene homopolymer (PPH-3):

[0085] The melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of at least one polypropylene homopolymer (PPH-3) is in the range of 1700 g / 10 min to 2300 g / 10 min, preferably 1800 g / 10 min to 2200 g / 10 min, and more preferably 2000 g / 10 min to 2100 g / 10 min.

[0086] Polypropylene homopolymer (PPH-4):

[0087] The melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of at least one polypropylene homopolymer (PPH-4) is in the range of 400 g / 10 min to 500 g / 10 min, preferably 420 g / 10 min to 480 g / 10 min, for example 450 g / 10 min.

[0088] The melting temperature of the polypropylene homopolymer (PPH-4) is at least 145°C, preferably at least 155°C, and more preferably in the range of 150°C to 170°C, for example, 161°C.

[0089] More specific embodiments of the compositions of the present invention are described below.

[0090] In a first embodiment, a polyolefin composition is provided comprising:

[0091] a) 20% to 40% by weight, preferably 25% to 35% by weight, more preferably 28% to 32% by weight of at least one multiphase polypropylene copolymer (PPHeco-1), wherein the melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of the at least one multiphase polypropylene copolymer (PPHeco-1) is in the range of 80 g / 10 min to 120 g / 10 min, preferably 90 g / 10 min to 110 g / 10 min, more preferably 100 g / 10 min to 105 g / 10 min.

[0092] b) 10% to 30% by weight, preferably 12% to 27% by weight, more preferably 15% to 25% by weight of at least one polypropylene homopolymer (PPH-1), wherein the melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of the at least one polypropylene homopolymer (PPH-1) is in the range of 600 g / 10 min to 1000 g / 10 min, preferably 700 g / 10 min to 900 g / 10 min, more preferably 800 g / 10 min to 850 g / 10 min;

[0093] c) 40% to 60% by weight, preferably 50% to 55% by weight, of a blend (A) of recycled plastic material comprising polypropylene and polyethylene, and optionally additional additives, wherein the sum of all components is always 100% by weight.

[0094] Such a first polyolefin composition can have:

[0095] - Melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) in the range of 50 g / 10 min to 80 g / 10 min, preferably 55 g / 10 min to 75 g / 10 min, more preferably 60 g / 10 min to 72 g / 10 min;

[0096] - Tensile modulus in the range of 1200 MPa to 1500 MPa, more particularly 1300 MPa to 1400 MPa (ISO 527-2);

[0097] -at 4kJ / m 2 Up to 8kJ / m 2 More notably, 4.2 kJ / m 2 Up to 7.7 kJ / m 2 Even more remarkably, 4.8 kJ / m 2 Up to 7kJ / m 2 And most notably, 5.4 kJ / m 2 Up to 6.6 kJ / m 2Impact strength within the range (Charge 1eA + 23℃), and

[0098] - Puncture energy in the range of 1.5J to 15J, more particularly 2J to 12J, and even more particularly 5J to 10J (ISO 6603-2, 4.4m / s, 2mm, 23°C).

[0099] In a second embodiment, a polyolefin composition is provided comprising:

[0100] a) 20% to 40% by weight, preferably 25% to 35% by weight, more preferably 28% to 32% by weight of at least one multiphase polypropylene copolymer (PPHeco-2), wherein the melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of the at least one multiphase polypropylene copolymer (PPHeco-2) is in the range of 60 g / 10 min to 90 g / 10 min, more preferably 70 g / 10 min to 80 g / 10 min.

[0101] b) 10% to 30% by weight, preferably 12% to 27% by weight, more preferably 15% to 25% by weight of at least one polypropylene homopolymer (PPH-1), wherein the melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of the at least one polypropylene homopolymer (PPH-1) is in the range of 600 g / 10 min to 1000 g / 10 min, preferably 700 g / 10 min to 900 g / 10 min, more preferably 800 g / 10 min to 850 g / 10 min;

[0102] c) 40% to 60% by weight, preferably 50% to 55% by weight, of a blend (A) of recycled plastic material comprising polypropylene and polyethylene, and optionally additional additives, wherein the sum of all components is always 100% by weight.

[0103] Such a second polyolefin composition can have:

[0104] - Melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) in the range of 50 g / 10 min to 80 g / 10 min, preferably 55 g / 10 min to 75 g / 10 min, more preferably 60 g / 10 min to 72 g / 10 min.

[0105] - Tensile modulus in the range of 1200 MPa to 1500 MPa, more particularly 1300 MPa to 1400 MPa (ISO 527-2);

[0106] -at 4kJ / m 2Up to 8kJ / m 2 More notably, 4.2 kJ / m 2 Up to 7.7 kJ / m 2 Even more remarkably, 4.8 kJ / m 2 Up to 7kJ / m 2 And most notably, 5.4 kJ / m 2 Up to 6.6 kJ / m 2 Impact strength within the range (Charge 1eA + 23℃), and

[0107] - Puncture energy in the range of 1.5J to 15J, more particularly 2J to 12J, and even more particularly 5J to 10J (ISO 6603-2, 4.4m / s, 2mm, 23°C).

[0108] In a third embodiment, a polyolefin composition is provided, comprising:

[0109] a) 35% to 48% by weight, preferably 40% to 48% by weight, more preferably 45% to 48% by weight, of at least one multiphase polypropylene copolymer (PPHeco-1), wherein the melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of said at least one multiphase polypropylene copolymer (PPHeco-1) is in the range of 80 g / 10 min to 120 g / 10 min, preferably 90 g / 10 min to 110 g / 10 min, more preferably 100 g / 10 min to 105 g / 10 min.

[0110] b) 2% to 10% by weight, preferably 2% to 5% by weight, more preferably 2% to 3% by weight, of at least one polypropylene homopolymer (PPH-1), wherein the melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of said at least one polypropylene homopolymer (PPH-1) is in the range of 600 g / 10 min to 1000 g / 10 min, preferably 700 g / 10 min to 900 g / 10 min, more preferably 800 g / 10 min to 850 g / 10 min; and

[0111] c) 40% to 60% by weight, preferably 50% to 55% by weight, of a blend of recycled plastic materials comprising polypropylene and polyethylene (A).

[0112] Such a third polyolefin composition can have:

[0113] - Melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) in the range of 25 g / 10 min to 50 g / 10 min, preferably 27 g / 10 min to 45 g / 10 min, more preferably 30 g / 10 min to 42 g / 10 min;

[0114] - Tensile modulus in the range of 1200 MPa to 1500 MPa, more particularly 1300 MPa to 1400 MPa (ISO 527-2);

[0115] -at 4kJ / m 2 Up to 8kJ / m 2 More notably, 4.2 kJ / m 2 Up to 7.7 kJ / m 2 Even more remarkably, 4.8 kJ / m 2 Up to 7kJ / m 2 And most notably, 5.4 kJ / m 2 Up to 6.6 kJ / m 2 Impact strength within the range (Charge 1eA + 23℃), and

[0116] - Puncture energy in the range of 1.5J to 15J, more particularly 2J to 12J, and even more particularly 5J to 10J (ISO 6603-2, 4.4m / s, 2mm, 23°C).

[0117] In the fourth embodiment, a polyolefin composition is provided, comprising:

[0118] a) 35% to 48% by weight, preferably 40% to 48% by weight, more preferably 45% to 48% by weight, of at least one multiphase polypropylene copolymer (PPHeco-2), wherein the melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of the at least one multiphase polypropylene copolymer (PPHeco-2) is in the range of 60 g / 10 min to 90 g / 10 min, more preferably 70 g / 10 min to 80 g / 10 min;

[0119] b) 2% to 10% by weight, preferably 2% to 5% by weight, more preferably 2% to 3% by weight, of at least one polypropylene homopolymer (PPH-1), wherein the melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of said at least one polypropylene homopolymer (PPH-1) is in the range of 600 g / 10 min to 1000 g / 10 min, preferably 700 g / 10 min to 900 g / 10 min, more preferably 800 g / 10 min to 850 g / 10 min; and

[0120] c) 40% to 60% by weight, preferably 50% to 55% by weight, of a blend of recycled plastic materials comprising polypropylene and polyethylene (A).

[0121] Such a fourth polyolefin composition can have:

[0122] - Melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) in the range of 25 g / 10 min to 50 g / 10 min, preferably 27 g / 10 min to 45 g / 10 min, more preferably 30 g / 10 min to 42 g / 10 min;

[0123] - Tensile modulus in the range of 1200 MPa to 1500 MPa, more particularly 1300 MPa to 1400 MPa (ISO 527-2);

[0124] -at 4kJ / m 2 Up to 8kJ / m 2 More notably, 4.2 kJ / m 2 Up to 7.7 kJ / m 2 Even more remarkably, 4.8 kJ / m 2 Up to 7kJ / m 2 And most notably, 5.4 kJ / m 2 Up to 6.6 kJ / m 2 Impact strength within the range (Charge 1eA + 23℃), and

[0125] - Puncture energy in the range of 1.5J to 15J, more particularly 2J to 12J, and even more particularly 5J to 10J (ISO 6603-2, 4.4m / s, 2mm, 23°C).

[0126] Blend of recycled materials A)

[0127] The blend (A) is obtained from a recycled waste stream. The blend (A) can be either recycled post-consumer waste or post-industrial waste, such as from the automotive industry, or alternatively a combination of both. Particularly preferred is that the blend (A) consists of recycled post-consumer waste and / or post-industrial waste.

[0128] In one aspect, the blend (A) can be a polypropylene (PP)-rich material from recycled plastics, the PP-rich material containing significantly more polypropylene than polyethylene. Polypropylene-rich recycled waste streams can be obtained, for example, from the automotive industry, particularly since some automotive parts, such as bumpers, are sources of fairly pure polypropylene material in recycled streams, or through enhanced sorting. Rich PP material can be obtained through selective treatment, degassing, and filtration, and / or through separation based on type and color (e.g., NIR or Raman sorting and VIS sorting). It can be obtained from domestic waste streams (i.e., products of domestic recycling), for example, from the "Yellow Bag" recycling system organized by the "Green Dot" organization operating in some areas of Germany.

[0129] Preferably, the polypropylene-rich recycled material is obtained from recycled waste using plastic recycling processes known in the art. Such PP-rich recycled materials are commercially available from sources such as Corepla (the Italian Consortium for the collection, recovery, and recycling of packaging plastic wastes), Resource Plastics Corp. (Brampton, Ontario), Kruschitz GmbH, Plastics and Recycling (Austria), Vogt Plastik GmbH (Germany), and Mtm Plastics GmbH (Germany). Non-exhaustive examples of PP-rich recycled materials include: PP, PP (MtmPlastics GmbH) Recycled polypropylene granules (Axion Ltd) and polypropylene copolymers (BSP compounds). It should be understood that this invention is applicable to a wide range of recycled polypropylene materials or materials or compositions with a high content of recycled polypropylene. The polypropylene-rich recycled material may be in granular form.

[0130] As previously stated, the polyolefin composition according to the invention comprises a polymer blend as component A), the polymer blend comprising a1) polypropylene and a2) polyethylene; wherein the weight ratio of a1) to a2) is 3:7 to 12:1, and wherein the polymer blend A) is a recycled material.

[0131] In another preferred embodiment of the present invention, the ratio of polypropylene (a1) to polyethylene (a2) is 7:1 to 10:1, and is preferably 8:1 to 9.5:1.

[0132] Another preferred embodiment of the invention specifies that the enthalpy of melting of component a2) in the polymer composition is in the range of 0.2 to 2.0, and preferably in the range of 0.25 to 1.75.

[0133] According to one embodiment, relative to the total weight of the composition of blend A, the blend (A) of recycled plastic material contains the following relative amounts of propylene-derived units: greater than 50% by weight, preferably greater than 53%, more preferably greater than 60% by weight, more preferably greater than 70% by weight, more preferably greater than 75% by weight, more preferably greater than 80% by weight, even more preferably greater than 90% by weight, and even more preferably greater than 95% by weight.

[0134] In another preferred embodiment of the invention, the content of polypropylene a1) in component A) is in the range of 75% to 99% by weight, and preferably in the range of 83% to 95% by weight, based on the total weight of component A). The content of polypropylene a1) in component A) can be determined by FTIR spectroscopy as described in the experimental section. More preferably, component a1) contains more than 95% by weight, preferably 96% to 99.9% by weight of isotactic polypropylene, and most preferably consists of isotactic polypropylene.

[0135] Furthermore, the blend (A) may have the following relative amounts of ethylene-derived units: less than 47% by weight, more preferably less than 40% by weight, more preferably less than 30% by weight, more preferably less than 20% by weight, and most preferably less than 10% by weight. Typically, the relative amount of ethylene-derived units is greater than 5% by weight relative to the total weight of the blend (A). It should be understood that the ethylene present is preferably ethylene derived from polyethylene and copolymers containing ethylene.

[0136] In another preferred embodiment of the invention, based on the total weight of component A), the content of polyethylene a2) in component A) is in the range of 1% to 25% by weight, preferably in the range of 5% to 20% by weight, and more preferably in the range of 7% to 17% by weight. The content of polyethylene a2) in component A) can be determined by FTIR spectroscopy as described in the experimental section. More preferably, component a2) is composed of polyethylene and a copolymer containing ethylene.

[0137] The polyethylene fraction of the recycled material may include recycled high-density polyethylene (rHDPE), recycled medium-density polyethylene (rMDPE), recycled low-density polyethylene (rLDPE), linear low-density polyethylene (LLDPE), and mixtures thereof. In one embodiment, the recycled material has an average density greater than 0.8 g / cm³. 3 Preferably greater than 0.9 g / cm³ 3The most preferred value is greater than 0.91 g / cm³. 3 High-density PE.

[0138] The polyethylene fraction of recycled materials can also contain plasmons. Plasmons are polymeric materials that combine rubber-like properties with the processability of plastics. An important plasmon is ethylene-alpha olefin copolymer.

[0139] The ethylene-based plastic body is preferably a copolymer of ethylene and C4 to C8 α-olefins. Suitable C4 to C8 α-olefins include 1-butene, 1-hexene, and 1-octene, preferably 1-butene or 1-octene, and more preferably 1-octene. Preferably, a copolymer of ethylene and 1-octene is used. Such an ethylene-based plastic body can be, for example, commercially available under the trade name Queo from Borealis AG (Austria), under the trade names Engage or Affinity from Dow Chemical Corp (USA), or under the trade name Tafmer from Mitsui. Alternatively, the ethylene-based plastic body can be prepared by known methods in the presence of a suitable catalyst known to those skilled in the art (such as a vanadium oxide catalyst or a single-point catalyst, such as a metallocene or restricted geometry catalyst) in a one-stage or two-stage polymerization process, said polymerization process including solution polymerization, slurry polymerization, gas-phase polymerization, or a combination thereof. It is permissible for the ethylene-based plastic body to be included in post-consumer waste and / or post-industrial waste for the production of blend (A). Alternatively, it is possible to add ethylene-based plasmids to post-consumer and / or post-industrial waste during the waste plastic recycling process that produces blend (A).

[0140] Another preferred embodiment of the invention specifies that, based on the total weight of component A), component A) contains less than 5% by weight, preferably less than 3% by weight, and more preferably 0.01% by weight to 2% by weight of a thermoplastic polymer different from a1) and a2), more preferably less than 4.0% by weight of PA6 and less than 5% by weight of polystyrene, and even more preferably, component A) contains 0.5% by weight to 3% by weight of polystyrene.

[0141] According to another preferred embodiment of the invention, based on the total weight of component A), component A) contains less than 5% by weight, preferably less than 4% by weight, and more preferably 0.01% by weight to 4% by weight of talc.

[0142] In another preferred embodiment of the invention, based on the total weight of component A), component A) contains less than 4% by weight, preferably less than 3% by weight, and more preferably 0.01% by weight to 2% by weight of chalk.

[0143] According to another preferred embodiment of the invention, based on the total weight of component A), component A) contains less than 1% by weight, preferably less than 0.5% by weight, and more preferably 0.01% by weight to 1% by weight of paper.

[0144] Another preferred embodiment of the invention specifies that, based on the total weight of component A), component A) contains less than 1% by weight, preferably less than 0.5% by weight, and more preferably 0.01% by weight to 1% by weight of wood.

[0145] In another preferred embodiment of the invention, based on the total weight of component A), component A) contains less than 1% by weight, preferably less than 0.5% by weight, and more preferably 0.01% by weight to 1% by weight of metal.

[0146] According to the present invention, the limonene content of the blend (A), as determined by solid-phase microextraction (HS-SPME-GC-MS), is from 0.1 ppm to 100 ppm, more preferably from 1 ppm to 50 ppm, and most preferably from 2 ppm to 35 ppm. Limonene is conventionally found in recycled polyolefin materials and originates from packaging applications in the fields of cosmetics, detergents, shampoos, and similar products. Therefore, when the blend (A) contains materials derived from such a stream of domestic waste, the blend (A) contains limonene.

[0147] Fatty acid content is another indicator of the recovery source of blend (A). However, in some cases, due to special treatment during the recovery process, the fatty acid content may be below the detection limit. According to the present invention, the fatty acid content of blend (A), as determined by solid phase microextraction (HS-SPME-GC-MS), is preferably from 1 ppm to 200 ppm, more preferably from 1 ppm to 150 ppm, more preferably from 2 ppm to 100 ppm, and most preferably from 3 ppm to 80 ppm.

[0148] In a preferred aspect, the blend (A) (i) contains less than 5% by weight, preferably less than 1.5% by weight, of polystyrene; and / or (ii) contains less than 3.5% by weight, preferably less than 1% by weight, of talc; and / or (iii) contains less than 1.0% by weight, preferably less than 0.5% by weight, of polyamide.

[0149] Due to the recycled source, the blend (A) may also contain, relative to the weight of the blend (A), up to 10% by weight, preferably 3% by weight: organic fillers, and / or inorganic fillers, and / or additives.

[0150] Therefore, in one embodiment of the polyolefin composition of the present invention, the blend (A) of recycled plastic material comprises:

[0151] A-1) Polypropylene content of 50% to 99% by weight,

[0152] A-2) Polyethylene content of 1% to 40% by weight,

[0153] A-3) 0% to 5.0% by weight of polystyrene and / or copolymers such as ABS,

[0154] A-4) 0% to 3.0% by weight of stabilizer,

[0155] A-5) 0% to 4.0% by weight of polyamide-6,

[0156] A-6) 0% to 3.0% by weight of talc,

[0157] A-7) 0% to 3.0% by weight of chalk,

[0158] A-8) 0% to 1.0% by weight of paper,

[0159] A-9) 0% to 1.0% by weight of timber,

[0160] A-10) 0% to 0.5% by weight of metal,

[0161] A-11) such as limonene from 0.1 ppm to 100 ppm as determined by solid-phase microextraction (HS-SPME-GC-MS), and

[0162] A-12) Total fatty acid content from 0 ppm to 200 ppm, as determined by solid-phase microextraction (HS-SPME-GC-MS).

[0163] All quantities are given relative to the total weight of the blend (A).

[0164] As described above, based on the total weight of blend (A), blend (A) may contain one or more additional components selected from the following:

[0165] A-4) Up to 3.0% by weight of stabilizer, preferably up to 2.0% by weight of stabilizer; A-5) Up to 4.0% by weight of polyamide-6, preferably up to 2.0% by weight of polyamide-6.

[0166] A-6) Up to 3.0% by weight of talc, preferably up to 1.0% by weight of talc.

[0167] A-7) up to 3.0% by weight of chalk, preferably up to 1.0% by weight of chalk.

[0168] A-8) Up to 1.0% by weight of paper, preferably up to 0.5% by weight of paper.

[0169] A-9) up to 1.0% by weight of timber, preferably up to 0.5% by weight of timber, and

[0170] A-10) up to 0.5% by weight of metal, preferably up to 0.1% by weight of metal.

[0171] In one embodiment, the melt flow rate (ISO 1133, 2.16 kg, 230 °C) of the blend (A) of recycled plastic material can be from 4 g / 10 min to 20 g / 10 min, preferably from 5 g / 10 min to 15 g / 10 min, and more preferably from 6 g / 10 min to 12 g / 10 min.

[0172] According to another embodiment, the melt flow rate MFR2 (ISO 1133, 230°C, 2.16 kg) of the blend (A) of recycled plastic material can be in the range of 16 g / 10 min to 50 g / 10 min, and preferably in the range of 18 g / 10 min to 22 g / 10 min.

[0173] In another preferred embodiment of the invention, the Charpy notched impact strength measured at 23°C according to ISO 179-1eA is greater than 3.0 kJ / m. 2 Preferably at 4.0 kJ / m 2 Up to 7.0 kJ / m 2 Within the range, and more preferably within 5.0 kJ / m 2 Up to 6.0 kJ / m 2 Within the range.

[0174] Another preferred embodiment of the invention specifies that the tensile modulus of blend A) as measured according to ISO 527-2 is in the range of 800 MPa to 1500 MPa, and preferably in the range of 1100 MPa to 1400 MPa.

[0175] The polyolefin compositions of the present invention are preferably free of glass fibers and / or chalk (except for small amounts that may be present in recycled materials in blend A).

[0176] However, additional additives can be added.

[0177] additive

[0178] In one embodiment, the polyolefin composition may contain at least one formulation agent for accepting fillers / pigments during extrusion. At least one coupling agent may have a melt flow rate MFR2 of 1 g / 10 min to 5 g / 10 min, preferably 2 g / 10 min to 3 g / 10 min, and 800 kg / m³. 3Up to 100kg / m 3 Preferably 900 kg / m 3 Up to 950kg / m 3 The density is a polypropylene homopolymer. Such polymers are available, for example, from Borealis AG under the trade name HC001A-B1. The amount of the formulation in the polyolefin composition can be from 1% to 2% by weight, for example from 1.2% to 1.4% by weight.

[0179] In another embodiment, the polyolefin composition may comprise at least one impact modifier. The impact modifier may be a plastomer and / or an elastomer. Suitable elastomers may be ethylene / propylene copolymers (C2 / C3 elastomers or C3 / C2 elastomers), ethylene / butene copolymers (C2 / C4 elastomers), ethylene / octene copolymers (C2 / C8 elastomers), grafted ethylene elastomers (e.g., MAH-grafted ethylene elastomers), or C2 / C3 block copolymers and C2 / C4 block copolymers with different C2 / C3 ratios, particularly ethylene-based 1-octene elastomers. Ethylene-based 1-octene elastomers may have an MFR (190°C, 2.16 kg) of 0.5 g / 10 min to 8 g / 10 min, and an MFR of 866 kg / m³. 3 Up to 904 kg / m 3 The density. Such compounds are commercially available, for example, under the trade name Queo 6800.

[0180] Examples of additional additives used in the composition include pigments or dyes (e.g., carbon black), stabilizers (antioxidants), acid stabilizers and / or UV stabilizers, antistatic agents, nucleating agents, and utilization agents (e.g., processing aids). Preferred additives are carbon black, at least one antioxidant, and / or at least one UV stabilizer.

[0181] Typically, based on the weight of the total composition, the amount of these additives ranges from 0% to 5.0% by weight, preferably from 0.01% to 3.0% by weight, more preferably from 0.01% to 2.0% by weight.

[0182] Examples of antioxidants commonly used in this field are sterically hindered phenols (e.g., CAS No. 6683-19-8, also known as Irganox 1010FF). TM Sold by BASF), phosphorus-based antioxidants (e.g., CAS No. 31570-04-4, also known as Hostanox PAR 24(FF)). TM Sold by Clariant or as Irgafos 168(FF) TM Sold by BASF), sulfur-based antioxidants (e.g., CAS No. 693-36-7, as Irganox PS-802FL)TM These antioxidants may be sold by BASF, nitrogen-based antioxidants (e.g., 4,4'-bis(1,1'-dimethylbenzyl)diphenylamine), or antioxidant blends. Preferred antioxidants may be tris(2,4-di-tert-butylphenyl) phosphite and / or octadecyl 3-(3',5'-di-tert-butyl-4-hydroxyphenyl) propionate.

[0183] Antioxidants are also well known in the art. Examples include calcium stearate, sodium stearate, zinc stearate, magnesium oxide and zinc oxide, synthetic hydrotalcite (e.g., SHT, CAS No. 11097-59-9), lactates / esters and lactyl esters, as well as calcium stearate (CAS No. 1592-23-0) and zinc stearate (CAS No. 557-05-1).

[0184] Common anti-blocking agents are natural silica, such as diatomaceous earth (e.g., CAS No. 60676-86-0 (SuperfFloss)). TM ), CAS number 60676-86-0 (SuperFloss E TM ), or CAS number 60676-86-0 (Celite499) TM Synthetic silica (e.g., CAS No. 7631-86-9, CAS No. 7631-86-9, CAS No. 7631-86-9, CAS No. 7631-86-9, CAS No. 7631-86-9, CAS No. 112926-00-8, CAS No. 7631-86-9, or CAS No. 7631-86-9); silicates (e.g., aluminum silicate (kaolin) CAS No. 1318-74-7, Sodium Aluminosilicate CAS No. 1344-00-9, Calcined Kaolin CAS No. 92704-41-1, Aluminosilicate CAS No. 1327-36-2, or Calcium Silicate CAS No. 1344-95-2; Synthetic zeolites (e.g., Sodium Aluminosilicate Calcium Hydrate CAS No. 1344-01-0, CAS No. 1344-01-0, or Sodium Aluminosilicate Calcium Hydrate CAS No. 1344-01-0).

[0185] UV stabilizers are, for example, bis(2,2,6,6-tetramethyl-4-piperidinyl)-sebate (CAS No. 52829-07-9, Tinuvin 770); 2-hydroxy-4-n-octyloxybenzophenone (CAS No. 1843-05-6, Chimassorb 81). Preferred UV stabilizers can be low molecular weight UV stabilizers and / or high molecular weight UV stabilizers, such as hexadecyl-3,5-di-tert-butyl-4-hydroxybenzoate, mixtures of esters of 2,2,6,6-tetramethyl-4-piperidinol and higher fatty acids (mainly stearic acid), and / or poly((6-morpholino-s-triazine-2,4-diyl)(1,2,2,6,6-pentamethyl-4-piperidinyl)imino)hexamethylene(1,2,2,6,6-pentamethyl-4-piperidinyl)imino)).

[0186] Alpha nucleating agents include sodium benzoate (CAS No. 532-32-1); 1,3:2,4-bis(3,4-dimethylbenzyl)sorbitol (CAS 135861-56-2, Millad 3988). Suitable antistatic agents are, for example, glyceryl esters (CAS No. 97593-29-8) or ethoxylated amines (CAS No. 71786-60-2 or CAS No. 61791-31-9) or ethoxylated amides (CAS No. 204-393-1). These additives are typically added in amounts from 100 ppm to 2000 ppm for each individual component of the polymer.

[0187] It should be understood that the present invention also relates to a method for producing a polyolefin composition as defined herein. The method includes the following steps:

[0188] - Provide a mixture of the following components in the required amounts: at least one polypropylene homopolymer (b); at least one multiphase polypropylene copolymer (a); and a blend of recycled plastic material (A);

[0189] - Melt the mixture in the extruder, and

[0190] -Optionally, the obtained polyolefin composition is granulated.

[0191] For the purposes of this invention, any suitable melting and mixing means known in the art can be used for mixing and melting.

[0192] However, the melting and mixing steps are preferably carried out in a mixer and / or blender, a high-shear mixer or a low-shear mixer, a high-speed blender or a twin-screw extruder. Most preferably, the melting and mixing steps are carried out in a twin-screw extruder, such as a co-rotating twin-screw extruder. Such twin-screw extruders are well known in the art, and those skilled in the art will adjust the melting and mixing conditions (e.g., melt temperature, screw speed, etc.) according to the process equipment.

[0193] The polyolefin compositions according to the invention can be used in a wide range of applications, such as for manufacturing covers, closures, caps, and thin-walled packaging.

[0194] Experimental Section

[0195] The following examples illustrate certain aspects and embodiments of the invention as described in the claims. However, those skilled in the art will understand that the following description is merely illustrative and should not be construed as limiting the invention in any way.

[0196] Test methods

[0197] Unless otherwise specified, the following terms and determination methods apply to the above general description of the invention and the following embodiments.

[0198] a) The amounts of iPP, polystyrene, ethylene (and copolymers containing ethylene), and polyamide-6 and polystyrene (and copolymers containing ethylene).

[0199] To establish different calibration curves for different standards, iPP and HDPE, as well as iPP, PS, and PA6, were blended. To quantify the content of foreign polymers, IR spectra were recorded in solid state using a Bruker Vertex 70 FTIR spectrometer. Films were prepared using a compression molding apparatus at 190°C with a clamping force of 4 MPa to 6 MPa. The film thickness for the iPP and HDPE calibration standards was 300 μm, and for the quantification of iPP, PS, and PA6, film thicknesses of 50 μm to 100 μm were used. Standard transmission FTIR spectroscopy was employed using the following method: 4000 cm⁻¹. -1 Up to 400cm -1 Spectral range, 6mm aperture, 2cm -1 Spectral resolution, 16 background scans, 16 spectral scans, 32 interferogram zero fill factor and Norton Beer strong apodization.

[0200] Measured iPP at 1167cm -1 The absorption at the site was measured, and the iPP content was quantified according to the calibration curve (absorption / thickness (in cm) relative to iPP content (in wt%)). Measurements were taken at 1601 cm⁻¹. -1 (PS) and 3300cm -1The absorption at (PA6) was measured, and the PS and PA6 contents were quantified according to the calibration curve (absorption / thickness (in cm) relative to PS and PA contents (in wt%)). The contents of polyethylene and ethylene-containing copolymers were obtained by subtracting (iPP+PS+PA6) from 100, taking into account the contents of non-polymeric impurities as determined below. This analysis was performed using a dual determination method.

[0201] b) The amounts of talc and chalk were measured by thermogravimetric analysis (TGA); experiments were performed using a Perkin Elmer TGA8000. Approximately 10 to 20 mg of material was placed in a platinum dish. The temperature was equilibrated at 50 °C for 10 minutes, and then increased to 950 °C at a heating rate of 20 °C / min under nitrogen. The weight loss (WCO2) between approximately 550 °C and 700 °C was designated as CO2 released from CaCO3, and thus the chalk content was assessed as:

[0202] Chalk content = 100 / 44 × WCO2

[0203] The temperature was then reduced to 300°C at a cooling rate of 20°C / min. The gas was then switched to oxygen, and the temperature was raised again to 900°C. The weight loss in this step is designated as carbon black (Wcb). Given the contents of carbon black and chalk, the ash content excluding chalk and carbon black was calculated as follows:

[0204] Ash content = (ash residue) - 56 / 44 × WCO2 - Wcb

[0205] The ash residue was measured by weight percent at 900°C during the first step under nitrogen atmosphere. The estimated ash content was the same as the talc content of the recovered material studied.

[0206] c) Quantity of paper and wood

[0207] Paper and wood are determined using conventional laboratory methods, including grinding, flotation, microscopy, and thermogravimetric analysis (TGA) or flotation techniques.

[0208] d) The amount of metal was determined by X-ray fluorescence (XRF).

[0209] e) The amount of limonene was determined by solid-phase microextraction (HS-SPME-GC-MS). Further details are given below for specific samples.

[0210] f) The total amount of fatty acids was determined by solid-phase microextraction (HS-SPME-GC-MS). Further details are given below for specific samples.

[0211] g) Melt flow rate is measured as indicated at 230°C or 190°C under a load of 2.16 kg. Melt flow rate is the amount of polymer extruded in grams over 10 minutes at a temperature of 230°C (or 190°C) under a load of 2.16 kg using a test apparatus standardized to ISO 1133.

[0212] h) Tensile modulus, tensile strength, tensile strain at break, tensile strain at tensile strength, tensile stress at break

[0213] The test specimens were measured after a 96-hour conditioning period (at 23°C and 50% relative humidity).

[0214] The tensile modulus was measured according to ISO 527-2 (crosshead speed = 1 mm / min; 23°C) using injection-molded specimens (dog bone shape, 4 mm thickness) as described in EN ISO 1873-2.

[0215] Tensile strength and tensile strain at break were measured according to ISO 527-2 (crosshead speed = 50 mm / min; 23°C) using injection-molded specimens (dog bone shape, 4 mm thickness) as described in EN ISO 1873-2.

[0216] The tensile strain under tensile strength is determined according to ISO 527-2 using injection-molded specimens (dog bone shape, 4 mm thickness) as described in EN ISO 1873-2 at an elongation rate of 50 mm / min until the specimen breaks.

[0217] The tensile stress at break was determined according to ISO 527-2 (crosshead speed = 50 mm / min) for samples with a thickness of 4 mm prepared from compression-formed plates.

[0218] i) Impact strength is determined as the Charpy impact strength of an 80mm × 10mm × 4mm injection-molded specimen prepared according to EN ISO 1873-2 at +23°C (notched) or +23°C (unnotched) according to ISO 179-1 / 1eU. The specimens are tested after 96 hours according to this standard.

[0219] j) The puncture energy is determined according to ISO 6603-2, 4.4 m / s, 2 mm, 23 °C.

[0220] k) Xylene Cold Soluble (XCS) is measured at 25°C according to ISO 16152; First Edition; 2005-07-01.

[0221] l) Crystex analysis

[0222] Crystallization fractionation and soluble fractionation

[0223] Crystalline fractions (CF) and soluble fractions (SF) of polypropylene (PP) compositions, along with the comonomer content and intrinsic viscosity of each fraction, were analyzed using CRYSTEX QC by Polymer Char (Valencia, Spain). The crystalline and amorphous fractions were separated by temperature cycling: dissolution at 160°C, crystallization at 40°C, and redissolution at 160°C in 1,2,4-trichlorobenzene (1,2,4-TCB). Quantification of SF and CF, and determination of the ethylene content (C2) of the parent EP copolymer and its soluble and crystalline fractions, were achieved using an infrared detector (IR4) and an online 2-capillary viscometer for determining intrinsic viscosity (iV). The IR4 detector is a multi-wavelength detector that measures IR absorbance at two different bands (CH3 and CH2) to determine the concentration and ethylene content of the ethylene-propylene copolymer. The IR4 detector was calibrated with a series of eight EP copolymers with known ethylene contents ranging from 2% to 69% by weight. 13 (determined by C-NMR spectrometer), and for each EP copolymer used for calibration, it has various concentrations from 2 mg / ml to 13 mg / ml.

[0224] XS calibration correlates the amounts of soluble fraction (SF) and crystalline fraction (CF) with the amounts of "xylene cold soluble" (XCS) and xylene cold insoluble (XCI) fractions, respectively, as determined by the standard gravimetric method according to ISO 16152. XS calibration is performed by testing various EP copolymers with XS contents ranging from 2% to 31% by weight.

[0225] The intrinsic viscosity (iV) of the parent EP copolymer and its soluble and crystalline fractions was determined using an online 2-capillary viscometer and correlated with the corresponding iV determined by a standard method in decahydronaphthalene according to ISO 1628. Calibration was performed using a variety of EP PP copolymers with iV ranging from 2 dL / g to 4 dL / g.

[0226] Weigh the PP composition sample to be analyzed at a concentration of 10 mg / ml to 20 mg / ml. After filling the vial with 1,2,4-TCB containing 250 mg / L of 2,6-tert-butyl-4-cresol (BHT) as an antioxidant, dissolve the sample at 160°C with continuous stirring at 800 rpm until complete dissolution is achieved (usually for 60 minutes).

[0227] A defined volume of sample solution is injected into a column packed with an inert support, where crystallization of the sample and separation of the soluble fraction from the crystalline fraction occur. This process is repeated twice. During the first injection, the entire sample is measured at high temperature to determine the iV [dl / g] and C2 [wt%] of the PP composition. During the second injection, the soluble fraction (at low temperature) and the crystalline fraction with crystallization cycles (at high temperature) are measured (wt% of SF, wt% of C2, iV).

[0228] EP stands for ethylene-propylene copolymer.

[0229] PP stands for polypropylene.

[0230] m) Intrinsic viscosity was measured according to DIN ISO 162811, October 1999 (in decahydronaphthalene at 135°C).

[0231] n) Thermal aging test

[0232] Store at 120°C for 300 hours:

[0233] Six tensile test bars were placed in a circulating air oven. Each bar was shaped as a 1A specimen according to ISO 527-2. The bars were stored on a metal grid in a Heraeus NTU 75 / 125 circulating air oven and conditioned at 120°C for 300 hours. After this conditioning period, the specimens were retrieved and conditioned in a controlled environment at 23°C / 50% relative humidity.

[0234] Store at 150°C for 75 hours:

[0235] Place six tensile test bars into a circulating air oven. Each bar should be the 1A specimen shape according to ISO 527-2. Store the tensile test bars in [location missing]. The samples were placed on a metal grid in a HeatEvent 60 / 60 circulating air oven and conditioned at 150°C for 75 hours. After this conditioning time, the samples were retrieved and conditioned in a controlled environment at 23°C / 50% relative humidity.

[0236] Several embodiments (comparative examples - CE; inventive examples - IE) are summarized in Tables 1 and 2 below.

[0237] Different blends A1 to A4 were made using recycled materials. The blends are characterized by the following properties:

[0238] Blend A-1:

[0239] Total C2 content of 8% to 10% by weight, C2(CF) content of 7% to 8% by weight, C2(SF) content of 28% to 30% by weight, MFR2 of 10 g / 10 min to 16 g / 10 min, tensile modulus of 1100 MPa to 1350 MPa, 4 kJ / m 2 Up to 7kJ / m 2 Impact strength (Charles test at 23°C)

[0240] Blend A-2:

[0241] Total C2 content from 9 wt% to 21 wt%, C2(CF) content from 16 wt% to 19 wt%, C2(SF) content from 32 wt% to 35 wt%, MFR2 from 15 g / 10 min to 25 g / 10 min, tensile modulus from 1150 MPa to 1350 MPa, 4 kJ / m 2 Up to 7kJ / m 2 Impact strength (Charles test at 23°C)

[0242] Blend A-3:

[0243] Total C2 content from 9 wt% to 21 wt%, C2(CF) content from 7 wt% to 20 wt%, C2(SF) content from 32 wt% to 35 wt%, MFR2 from 10 g / 10 min to 40 g / 10 min, tensile modulus from 1100 MPa to 1450 MPa, 5 kJ / m 2 Up to 7kJ / m 2 Impact strength (Charles test at 23°C)

[0244] Blend A-4:

[0245] Total C2 content from 9 wt% to 21 wt%, C2(CF) content from 7 wt% to 20 wt%, C2(SF) content from 32 wt% to 35 wt%, MFR2 from 10 g / 10 min to 40 g / 10 min, tensile modulus from 1100 MPa to 1450 MPa, 5 kJ / m 2 Up to 7kJ / m 2 Impact strength (Charles test at 23°C)

[0246] Table 1 relates to polyolefin compositions comprising the following:

[0247] a)(IE2, IE5) A multiphase polypropylene copolymer (PPHeco-1, MFR2 is 100g / 10min, T c =112.3℃), a polypropylene homopolymer (PPH-1, MFR2 is 800g / 10min, T c=112.3℃), and a blend A of recycled materials (blend A-1, MFR2 is 10g / 10min to 16g / 10min, T c =112.3℃),

[0248] b)(IE4) A multiphase polypropylene copolymer (PPHeco-1, MFR2 is 100g / 10min, T) c =112.3℃), a polypropylene homopolymer (PPH-1, MFR2 is 800g / 10min, T c =112.3℃), and a blend of recycled materials A) (blended A-2, MFR2 is 15g / 10min to 25g / 10min, T c =112.3℃),

[0249] c)(IE1) A multiphase polypropylene copolymer (PPHeco-2, MFR2 is 70 g / 10 min, T) c =112.3℃), a polypropylene homopolymer (PPH-1, MFR2 is 800g / 10min, T c =112.3℃), and a blend A of recycled materials (blend A-1, MFR2 is 10g / 10min to 16g / 10min, T c =112.3℃), and

[0250] d)(IE3) A multiphase polypropylene copolymer (PPHeco-2, MFR2 is 70 g / 10 min, T c =112.3℃), a polypropylene homopolymer (PPH-1, MFR2 is 800g / 10min, T c =112.3℃), and a blend A of recycled materials (blended A-2, MFR2 of 15g / 10min to 25g / 10min, T c =112.3℃), and other additives,

[0251] e)(IE6) A multiphase polypropylene copolymer (PPHeco-1, MFR2 is 100g / 10min, T) c =112.3℃), a polypropylene homopolymer (PPH-1, MFR2 is 800g / 10min, T c =112.3℃), and blend A of recycled materials (blend A-3, MFR2 is 10g / 10min to 40g / 10min), and

[0252] f)(IE7) A multiphase polypropylene copolymer (PPHeco-1, MFR2 is 100g / 10min, T) c=112.3℃), a polypropylene homopolymer (PPH-1, MFR2 is 800g / 10min, T c =112.3℃), and a blend of recycled materials (blend A-4, MFR2 is 10g / 10min to 40g / 10min).

[0253] Table 2 describes the properties of polyolefin compositions comprising the following: a multiphase polypropylene copolymer (PPHeco-2, MFR2 70 g / 10 min, T... c =112.3℃), a polypropylene homopolymer (PPH-1, MFR2 is 800g / 10min, T c =112.3℃), and a blend of recycled materials A)(A-1, MFR2 of 6g / 10min to 12g / 10min, T c =112.3℃), and other additives (IE8 to IE10).

[0254] The following additives are used: antioxidants: AO1 (Irganox 1010FF), AO2 (ARENOX DS), AO3 (IRGAFOS 168FF), AO4; pigments: CB (Plasblak PE6121, commercially available from Cabot); AO501GRA / SONGNOX 21B FF and formulation agents HC001A-B1, FK1820.

[0255]

[0256]

[0257] As shown in Table 1, the melt flow rates of the multiphase copolymer-homopolymer-recycled compositions according to Invention Examples IE1 to IE7 are higher than those of the multiphase copolymer-recycled compositions CE1 to CE4. Meanwhile, the tensile modulus, impact strength, and puncture energy are comparable. The same thermal aging exposure was achieved for IE2 and IE3 as for CE2 and CE4.

[0258] Therefore, the properties of the multiphase copolymer-homogene-recycled composition according to the present invention are characterized by a melt flow rate that allows for good processing and a tensile modulus that indicates a stable material.

[0259]

[0260] Table 2: Properties of the following polyolefin compositions: A blend of recycled Dipolen PP (MFR2 6 g / 10 min to 12 g / 10 min blend A-1) containing a blend of recycled Dipolen PP (MFR2 6 g / 10 min to 12 g / 10 min blend A-1) or a multiphase polypropylene copolymer (PPHeco-2, MFR2 70 g / 10 min, T... c =112.3°C) polyolefin compositions (comparative examples CE5 to CE6); and polyolefin compositions according to the present invention comprising a multiphase polypropylene copolymer PPHeco-2 with an MFR2 of 70 g / 10 min, mixed with a blend of recycled material Dipolen PP (a blend A-1 with an MFR2 of 6 g / 10 min to 12 g / 10 min), and a polypropylene homopolymer (PPH-1 with an MFR2 of 800 g / 10 min).

[0261] Table 2 shows that the melt flow rate of the multiphase copolymer-homogeneous polymer-recycled material compositions according to Invention Examples IE8 to IE10 is higher than that of the recycled material (CE-5). Furthermore, compared to CE6 without homopolymer, the impact strength is improved in Invention Examples IE8 to IE10, which contain homopolymer; while the tensile strength is comparable.

Claims

1. A polyolefin composition comprising: a) 20% to 40% by weight of at least one multiphase polypropylene copolymer, wherein the melt flow rate (MFR2) of the at least one multiphase polypropylene copolymer is at least 40 g / 10 min, as measured according to ISO 1133 at 230 °C and 2.16 kg. b) 10% to 30% by weight of at least one polypropylene homopolymer, wherein the melt flow rate (MFR2) of said at least one polypropylene homopolymer, measured according to ISO 1133 at 230°C and 2.16 kg, is at least 400 g / 10 min; and c) A blend (A) of recycled plastic material comprising 40% to 60% by weight of polypropylene and polyethylene in a ratio of 3:7 to 12:1, said blend (A) being recycled from waste plastic material derived from post-consumer and / or post-industrial waste, said blend (A) having a melt flow rate (MFR2) of at least 5 g / 10 min measured according to ISO 1133 at 230 °C and 2.16 kg, wherein said blend (A) of recycled plastic material comprises a relative amount of more than 80% by weight of propylene-derived units and less than 20% by weight of ethylene-derived units. And optionally other additives, wherein the sum of all ingredients is always 100% by weight. The polyolefin composition is characterized in that Melt flow rate MFR2, measured at 230°C and 2.16 kg according to ISO 1133, at least 20 g / 10 min.

2. The polyolefin composition according to claim 1, characterized in that the polyolefin composition comprises 25% to 35% by weight of the at least one multiphase polypropylene copolymer.

3. The polyolefin composition according to claim 1, characterized in that the polyolefin composition comprises 28% to 32% by weight of the at least one multiphase polypropylene copolymer.

4. The polyolefin composition according to claim 1, characterized in that the polyolefin composition comprises 12% to 27% by weight of the at least one polypropylene homopolymer.

5. The polyolefin composition according to claim 1, characterized in that the polyolefin composition comprises 15% to 25% by weight of the at least one polypropylene homopolymer.

6. The polyolefin composition according to claim 1, characterized in that the polyolefin composition comprises 50% to 55% by weight of the blend (A).

7. The polyolefin composition according to claim 1, characterized in that the melt flow rate (MFR2) of the polyolefin composition, measured according to ISO 1133 at 230°C and 2.16 kg, is at least 50 g / 10 min.

8. The polyolefin composition according to claim 1, characterized in that the melt flow rate (MFR2) of the polyolefin composition, measured according to ISO 1133 at 230°C and 2.16 kg, is at least 60 g / 10 min.

9. The polyolefin composition according to claim 1, characterized in that the melt flow rate (MFR2) of the polyolefin composition, measured according to ISO 1133 at 230°C and 2.16 kg, is in the range of 50 g / 10 min to 80 g / 10 min.

10. The polyolefin composition according to claim 1, characterized in that the melt flow rate (MFR2) of the polyolefin composition, measured according to ISO 1133 at 230°C and 2.16 kg, is in the range of 55 g / 10 min to 75 g / 10 min.

11. The polyolefin composition according to claim 1, characterized in that the melt flow rate (MFR2) of the polyolefin composition, measured according to ISO 1133 at 230°C and 2.16 kg, is in the range of 60 g / 10 min to 72 g / 10 min.

12. A polyolefin composition comprising: a) 35% to 48% by weight of at least one multiphase polypropylene copolymer, wherein the melt flow rate (MFR2) of the at least one multiphase polypropylene copolymer is at least 40 g / 10 min, as measured according to ISO 1133 at 230 °C and 2.16 kg. b) 2% to 10% by weight of at least one polypropylene homopolymer, wherein the melt flow rate (MFR2) of said at least one polypropylene homopolymer, measured according to ISO 1133 at 230°C and 2.16 kg, is at least 400 g / 10 min; and c) A blend (A) of recycled plastic material comprising 40% to 60% by weight of polypropylene and polyethylene in a ratio of 3:7 to 12:1, said blend (A) being recycled from waste plastic material derived from post-consumer and / or post-industrial waste, said blend (A) having a melt flow rate (MFR2) of at least 5 g / 10 min measured according to ISO 1133 at 230 °C and 2.16 kg, wherein said blend (A) of recycled plastic material comprises a relative amount of more than 80% by weight of propylene-derived units and less than 20% by weight of ethylene-derived units. And optionally other additives, wherein the sum of all ingredients is always 100% by weight. The polyolefin composition is characterized in that Melt flow rate MFR2, measured at 230°C and 2.16 kg according to ISO 1133, at least 20 g / 10 min.

13. The polyolefin composition according to claim 12, characterized in that the polyolefin composition comprises 40% to 48% by weight of the at least one multiphase polypropylene copolymer.

14. The polyolefin composition according to claim 12, characterized in that the polyolefin composition comprises 45% to 48% by weight of the at least one multiphase polypropylene copolymer.

15. The polyolefin composition according to claim 12, characterized in that the polyolefin composition comprises 2% to 5% by weight of the at least one polypropylene homopolymer.

16. The polyolefin composition according to claim 12, characterized in that the polyolefin composition comprises 2% to 3% by weight of the at least one polypropylene homopolymer.

17. The polyolefin composition according to claim 12, characterized in that the polyolefin composition comprises 50% to 55% by weight of the blend (A).

18. The polyolefin composition according to claim 12, characterized in that the melt flow rate (MFR2) of the polyolefin composition, measured according to ISO 1133 at 230°C and 2.16 kg, is at least 25 g / 10 min.

19. The polyolefin composition according to claim 12, characterized in that the melt flow rate (MFR2) of the polyolefin composition, measured according to ISO 1133 at 230°C and 2.16 kg, is at least 30 g / 10 min.

20. The polyolefin composition according to claim 12, characterized in that the melt flow rate MFR2 of the polyolefin composition, measured according to ISO 1133 at 230°C and 2.16 kg, is in the range of 20 g / 10 min to 50 g / 10 min.

21. The polyolefin composition according to claim 12, characterized in that the melt flow rate (MFR2) of the polyolefin composition, measured according to ISO 1133 at 230°C and 2.16 kg, is in the range of 25 g / 10 min to 45 g / 10 min.

22. The polyolefin composition according to claim 12, characterized in that the melt flow rate (MFR2) of the polyolefin composition, measured according to ISO 1133 at 230°C and 2.16 kg, is in the range of 27 g / 10 min to 42 g / 10 min.

23. The polyolefin composition according to claim 1 or 12, characterized in that the tensile modulus according to ISO 527-2 is at least 1200 MPa.

24. The polyolefin composition according to claim 1 or 12, characterized in that the tensile modulus according to ISO 527-2 is at least 1300 MPa.

25. The polyolefin composition according to claim 1 or 12, characterized in that the tensile modulus according to ISO 527-2 is at least 1400 MPa.

26. The polyolefin composition according to claim 1 or 12, characterized in that the tensile modulus according to ISO 527-2 is in the range of 1200 MPa to 1500 MPa.

27. The polyolefin composition according to claim 1 or 12, characterized in that the tensile modulus according to ISO 527-2 is in the range of 1300 MPa to 1400 MPa.

28. The polyolefin composition according to claim 1 or 12, characterized in that its impact strength at Charpyroxene 1eA+23°C, according to ISO 179, is at least 4 kJ / m². 2 .

29. The polyolefin composition according to claim 1 or 12, characterized in that its impact strength at Charpyroxen 1eA+23°C, according to ISO 179, is at least 5 kJ / m². 2 .

30. The polyolefin composition according to claim 1 or 12, characterized in that its impact strength at Charpyroxene 1eA+23°C, according to ISO 179, is at least 6 kJ / m². 2 .

31. The polyolefin composition according to claim 1 or 12, characterized in that its impact strength at Charpyroxene 1eA+23°C, according to ISO 179, is at least 7 kJ / m². 2 .

32. The polyolefin composition according to claim 1 or 12, characterized in that its impact strength at Charpyroxen 1eA+23°C, according to ISO 179, is 4 kJ / m². 2 Up to 8 kJ / m 2 Within the range.

33. The polyolefin composition according to claim 1 or 12, characterized in that its impact strength at Charpyroxene 1eA+23°C, according to ISO 179, is 4.2 kJ / m². 2 Up to 7.7 kJ / m 2 Within the range.

34. The polyolefin composition according to claim 1 or 12, characterized in that its impact strength at Charpyroxene 1eA+23°C, according to ISO 179, is 4.8 kJ / m². 2 Up to 7 kJ / m 2 Within the range.

35. The polyolefin composition according to claim 1 or 12, characterized in that its impact strength at Charpyroxene 1eA+23°C, according to ISO 179, is 5.4 kJ / m². 2 Up to 6.6 kJ / m 2 Within the range.

36. The polyolefin composition according to claim 1 or 12, characterized in that the puncture energy is at least 1.5 J at 4.4 m / s, 2 mm and 23°C according to ISO 6603-2.

37. The polyolefin composition according to claim 1 or 12, characterized in that the puncture energy is at least 2 J at 4.4 m / s, 2 mm and 23°C according to ISO 6603-2.

38. The polyolefin composition according to claim 1 or 12, characterized in that the puncture energy is at least 3 J at 4.4 m / s, 2 mm and 23°C according to ISO 6603-2.

39. The polyolefin composition according to claim 1 or 12, characterized in that the puncture energy is at least 4 J at 4.4 m / s, 2 mm and 23°C according to ISO 6603-2.

40. The polyolefin composition according to claim 1 or 12, characterized in that the puncture energy is in the range of 1.5 J to 15 J at 4.4 m / s, 2 mm and 23 °C according to ISO 6603-2.

41. The polyolefin composition according to claim 1 or 12, characterized in that the puncture energy is in the range of 2 J to 12 J at 4.4 m / s, 2 mm and 23 °C according to ISO 6603-2.

42. The polyolefin composition according to claim 1 or 12, characterized in that the puncture energy is in the range of 5 J to 10 J at 4.4 m / s, 2 mm and 23 °C according to ISO 6603-2.

43. The polyolefin composition according to claim 1 or 12, characterized in that the at least one multiphase polypropylene copolymer a) is selected from the group consisting of: - At least one multiphase polypropylene copolymer PPHeco-1 with a melt flow rate (MFR2) in the range of 80 g / 10 min to 120 g / 10 min, as measured by ISO 1133 at 230 °C and 2.16 kg. - At least one multiphase polypropylene copolymer PPHeco-2, or a mixture thereof, with a melt flow rate (MFR2) in the range of 60 g / 10 min to 90 g / 10 min, as measured according to ISO 1133 at 230 °C and 2.16 kg.

44. The polyolefin composition according to claim 43, characterized in that the melt flow rate (MFR2) of the at least one multiphase polypropylene copolymer PPHeco-1, measured according to ISO 1133 at 230°C and 2.16 kg, is in the range of 90 g / 10 min to 110 g / 10 min.

45. The polyolefin composition according to claim 43, characterized in that the melt flow rate (MFR2) of the at least one multiphase polypropylene copolymer PPHeco-1, measured according to ISO 1133 at 230°C and 2.16 kg, is in the range of 100 g / 10 min to 105 g / 10 min.

46. ​​The polyolefin composition according to claim 43, characterized in that the melt flow rate (MFR2) of the at least one multiphase polypropylene copolymer PPHeco-2, measured according to ISO 1133 at 230°C and 2.16 kg, is in the range of 70 g / 10 min to 80 g / 10 min.

47. The polyolefin composition according to claim 1 or 12, characterized in that the at least one polypropylene homopolymer b) is selected from the group consisting of: - At least one polypropylene homopolymer PPH-1 with a melt flow rate (MFR2) in the range of 600 g / 10 min to 1000 g / 10 min, as measured by ISO 1133 at 230 °C and 2.16 kg. - At least one polypropylene homopolymer PPH-2 with a melt flow rate (MFR2) in the range of 1000 g / 10 min to 1500 g / 10 min, as measured by ISO 1133 at 230 °C and 2.16 kg. - At least one polypropylene homopolymer PPH-3 with a melt flow rate (MFR2) in the range of 1700 g / 10 min to 2300 g / 10 min, as measured by ISO 1133 at 230 °C and 2.16 kg. - At least one polypropylene homopolymer PPH-4 with a melt flow rate (MFR2) in the range of 400 g / 10 min to 500 g / 10 min, measured according to ISO 1133 at 230 °C and 2.16 kg.

48. The polyolefin composition according to claim 47, characterized in that the melt flow rate (MFR2) of the at least one polypropylene homopolymer PPH-1, measured according to ISO 1133 at 230°C and 2.16 kg, is in the range of 700 g / 10 min to 900 g / 10 min.

49. The polyolefin composition according to claim 47, characterized in that the melt flow rate (MFR2) of the at least one polypropylene homopolymer PPH-1, measured according to ISO 1133 at 230°C and 2.16 kg, is in the range of 800 g / 10 min to 850 g / 10 min.

50. The polyolefin composition according to claim 47, characterized in that the melt flow rate (MFR2) of the at least one polypropylene homopolymer PPH-2, measured according to ISO 1133 at 230°C and 2.16 kg, is in the range of 1100 g / 10 min to 1300 g / 10 min.

51. The polyolefin composition according to claim 47, characterized in that the melt flow rate (MFR2) of the at least one polypropylene homopolymer PPH-2, measured according to ISO 1133 at 230°C and 2.16 kg, is in the range of 1200 g / 10 min to 1250 g / 10 min.

52. The polyolefin composition according to claim 47, characterized in that the melt flow rate (MFR2) of the at least one polypropylene homopolymer PPH-3, measured according to ISO 1133 at 230°C and 2.16 kg, is in the range of 1800 g / 10 min to 2200 g / 10 min.

53. The polyolefin composition according to claim 47, characterized in that the melt flow rate (MFR2) of the at least one polypropylene homopolymer PPH-3, measured according to ISO 1133 at 230°C and 2.16 kg, is in the range of 2000 g / 10 min to 2100 g / 10 min.

54. The polyolefin composition according to claim 47, characterized in that the melt flow rate (MFR2) of the at least one polypropylene homopolymer PPH-4, measured according to ISO 1133 at 230°C and 2.16 kg, is in the range of 420 g / 10 min to 480 g / 10 min.

55. The polyolefin composition according to claim 47, characterized in that the melt flow rate (MFR2) of the at least one polypropylene homopolymer PPH-4, measured according to ISO 1133 at 230°C and 2.16 kg, is 450 g / 10 min.

56. The polyolefin composition according to claim 1 or 12, characterized in that, relative to the total weight of the blend (A), the blend (A) of recycled plastic material contains a relative amount of more than 90% by weight of propylene-derived units.

57. The polyolefin composition according to claim 1 or 12, characterized in that, relative to the total weight of the blend (A), the blend (A) of recycled plastic material contains a relative amount of more than 95% by weight of propylene-derived units.

58. The polyolefin composition according to claim 1 or 12, characterized in that, relative to the total weight of the blend (A), the blend (A) of recycled plastic material contains less than 10% by weight of ethylene-derived units.

59. A method for producing a polyolefin composition according to claim 1 or 12, wherein the method comprises the following steps: - Provide a mixture of the following components in the required amounts: the at least one polypropylene homopolymer (b), the at least one multiphase polypropylene copolymer (a), and the blend (A) of recycled plastic material; - Melt the mixture in an extruder, and - Optionally, the obtained polyolefin composition may be granulated.

60. An article comprising the polyolefin composition according to claim 1 or 12.

61. The article of claim 60, characterized in that the article is a cover, a closure, or a thin-walled package.

62. The article of claim 60, characterized in that the article is a lid.

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