High melt flow polypropylene composition

Abstract

The present invention relates to a composition obtainable by blending at least components (A), (B) and (C): (A) 25 to 75 wt.-%, preferably 35 to 65 wt.-%, more preferably 40 to 60 wt.-% of a mixed plastic polypropylene blend; (B) 17 to 65 wt.-%, preferably 20 to 55 wt.-%, more preferably 25 to 50 wt.-% of a first propylene homopolymer; and (C) 3 to 30 wt.-%, preferably 5 to 27 wt.-%, more preferably 7 to 25 wt.-% of a second propylene homopolymer.

Description

Technical Field

[0001] This invention relates to high melt flow polypropylene compositions comprising mixed plastic polypropylene-based blends. Background Technology

[0002] High melt flow polypropylene is suitable for producing fiber-reinforced composites for applications such as the automotive industry.

[0003] One of the fundamental problems in the polymer industry is recycling. Currently, the market for recycled materials, particularly household waste recycled materials (often referred to as PCR (“post-consumer resins”), is somewhat limited. Starting with household waste, the sorting and separation processes employed cannot produce pure polymers; there will always be some contaminants, or the process may even result in a mixture of different polymers. For polyolefins, which constitute the vast majority of the polymeric components in collected household waste, perfect separation of polypropylene and polyethylene is virtually impossible. Recycled polyolefin materials, especially post-consumer resins, are often cross-contaminated with non-polyolefin materials such as polyethylene terephthalate, polyamides, polystyrene, or non-polymeric materials such as wood, paper, glass, or aluminum. Worse still, these post-consumer recycled polyolefin materials are readily available in tonnes, but unfortunately, they have limited mechanical properties and often present serious odor and / or emission problems.

[0004] For fiber-reinforced applications, polypropylene compositions with high melt flow rates are required to prevent fiber breakage. Simultaneously, a balance of mechanical properties—high stiffness and strength—is needed. Recently, market demand has expanded to include blends of recycled polyolefins with virgin polymers to meet specific requirements.

[0005] However, there is a deep need to allow the dumping and reuse of post-consumer polyolefin recyclables in final products without compromising health and safety.

[0006] This invention is based on the surprising discovery that, through careful selection of the propylene-based homopolymer-based components in polypropylene-based compositions, which comprise blended plastic polypropylene-based blends derived from post-consumer recycled polyolefin streams, the polypropylene-based compositions exhibit an excellent balance of performance in terms of impact properties, particularly mechanical properties (e.g., tensile properties), and flowability (manifested as high melt flow rates). Therefore, the compositions of this invention, including blended plastic polypropylene-based blends derived from post-consumer recycled polyolefin streams, are suitable for molding applications and fiber-reinforced composites, particularly in the automotive sector, such as exterior automotive applications, and can replace complex polypropylene compositions. Summary of the Invention

[0007] This invention relates to a composition that can be obtained by blending at least components (A), (B) and (C).

[0008] (A) 25% to 75% by weight, preferably 35% to 65% by weight, more preferably 40% to 60% by weight of mixed plastic polypropylene blends;

[0009] (B) 17% to 65% by weight, preferably 20% to 55% by weight, more preferably 25% to 50% by weight, of a first propylene homopolymer; and

[0010] (C) 3% to 30% by weight, preferably 5% to 27% by weight, more preferably 7% to 25% by weight of a second propylene homopolymer.

[0011] All percentages are relative to the total composition, and the mixed plastic polypropylene blend (A) has

[0012] - The content of crystallization fraction (CF) determined according to CRYSTEX QC analysis in the range of 82.5 wt% to 96.0 wt%, preferably in the range of 84.0 wt% to 95.5 wt%, and

[0013] - The content of soluble fraction (SF) determined according to CRYSTEX QC analysis in the range of 4.0 wt% to 17.5 wt%, preferably in the range of 4.5 wt% to 16.0 wt%, wherein

[0014] The crystalline fraction (CF) has a content in the range of 1.0 wt% to 12.5 wt%, preferably in the range of 1.5 wt% to 11.0 wt%, through quantitative analysis. 13 Ethylene content (C2(CF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy; and

[0015] - The soluble fraction (SF) has an intrinsic viscosity (iV(SF)) in the range of 0.9 dl / g to less than 2.5 dl / g, preferably in the range of 1.0 dl / g to 2.3 dl / g, and more preferably in the range of 1.1 dl / g to 2.2 dl / g;

[0016] The first propylene homopolymer (B) has

[0017] A melt flow rate MFR2 (230°C, 2.16 kg, ISO 1133) of -500 g / 10 min to 1100 g / 10 min, preferably 650 g / 10 min to 1000 g / 10 min, more preferably 750 g / 10 min to 900 g / 10 min; and

[0018] The second propylene homopolymer (C) has

[0019] Melt flow rate MFR2 (230°C, 2.16 kg, ISO 1133) of -80 g / 10 min to 200 g / 10 min, preferably 100 g / 10 min to 175 g / 10 min, more preferably 120 g / 10 min to 150 g / 10 min; and

[0020] A tensile modulus of -1500 MPa to 2100 MPa, preferably 1550 MPa to 2000 MPa, and more preferably 1600 MPa to 1900 MPa, and

[0021] The composition has

[0022] Melt flow rate MFR2 (230°C, 2.16 kg, ISO 1133) of 50 g / 10 min to 100 g / 10 min, preferably 55 g / 10 min to 95 g / 10 min, more preferably 60 g / 10 min to 90 g / 10 min.

[0023] Furthermore, the present invention relates to an article comprising the composition described above or below, preferably a molded article or a fiber-reinforced composite material, more preferably an automotive article.

[0024] Furthermore, the present invention relates to the use of the compositions described above or below in the production of articles, preferably automotive articles, more preferably exterior automotive articles.

[0025] definition

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. While any methods and materials similar to or equivalent to those described herein may be used in practice to test the invention, preferred materials and methods are described herein. In describing and claiming protection for this invention, the following terms will be used according to their definitions. Unless otherwise expressly stated, the terms “a,” “an,” etc., are used to mean one or more.

[0027] Blended plastics are defined as those containing small amounts of compounds not typically found in virgin polypropylene blends, such as polystyrene, polyamides, polyesters, wood, paper, limonene, aldehydes, ketones, fatty acids, metals, and / or long-term decomposition products of stabilizers. Virgin polypropylene blends are blends derived directly from the production process without any intermediate uses.

[0028] By definition, “mixed plastics” can be equivalent to detectable amounts of polystyrene and / or polyamide-6 and / or limonene and / or fatty acids.

[0029] Therefore, unlike virgin polymers, blended plastics can originate from both post-consumer and industrial waste. Post-consumer waste refers to objects that have completed at least their first use cycle (or life cycle), meaning they have fulfilled their first purpose. In contrast, industrial waste refers to manufacturing or processing waste that typically does not reach consumers.

[0030] Those skilled in the art will understand that soluble fractions (SF) with intrinsic viscosity (iV(SF)) in the range of 0.9 dl / g to 2.5 dl / g are typically present in materials from recycled streams. In a preferred aspect of the invention, the soluble fractions (SF) obtained by CRYSTEX QC analysis have an intrinsic viscosity (iV(SF)) in the range of 0.9 dl / g to 2.2 dl / g.

[0031] Polymer blends are mixtures of two or more polymer components. Generally, blends are prepared by mixing two or more polymer components. A suitable mixing procedure known in the art is post-polymerization blending. Post-polymerization blending can be a dry blending of polymer components such as polymer powders and / or composite polymer granules, or a melt blending of polymer components by melt mixing.

[0032] Propylene homopolymers are polymers that are essentially composed of propylene monomer units. Due to impurities, especially during industrial polymerization, propylene homopolymers may include 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.

[0033] "Polypropylene-polyethylene blends" refer to compositions containing both polypropylene and polyethylene, and also include polypropylene copolymers and polyethylene copolymers. Since the polypropylene and polyethylene contents cannot be directly measured, the weight ratio of polypropylene (A-1) to polyethylene (A-2) from 19:1 to 7:3 represents the equivalent ratio determined by calibration with polypropylene (iPP) and high-density polyethylene (HDPE) and by infrared (IR) spectroscopy.

[0034] Polypropylene is a polymer composed of units derived from propylene in amounts greater than 50 mol%.

[0035] Polyethylene is a polymer composed of units derived from ethylene in an amount greater than 50 mol%.

[0036] The term "XCS" refers to the cold soluble fraction of xylene (XCS wt%) determined at 25°C according to ISO 16152. The term "XCI" refers to the cold insoluble fraction of xylene (XCI wt%) determined at 25°C according to ISO 16152.

[0037] Reactor blends are blends produced in two or more reactors connected in series or in a reactor having two or more reaction chambers. Alternatively, reactor blends can be produced by blending in solution. Reactor blends contrast sharply with compounds produced by melt extrusion.

[0038] Unless otherwise stated, "%" refers to weight % (wt%). Detailed Implementation

[0039] Composition

[0040] In a first aspect, the present invention relates to a composition that can be obtained by blending at least components (A), (B) and (C).

[0041] (A) 25% to 75% by weight, preferably 35% to 65% by weight, more preferably 40% to 60% by weight of mixed plastic polypropylene blends;

[0042] (B) 17% to 65% by weight, preferably 20% to 55% by weight, more preferably 25% to 50% by weight, of a first propylene homopolymer; and

[0043] (C) 3% to 30% by weight, preferably 5% to 27% by weight, more preferably 7% to 25% by weight of a second propylene homopolymer

[0044] All percentages are relative to the total composition, and the mixed plastic polypropylene blend (A) has

[0045] - The content of crystallization fraction (CF) determined according to CRYSTEX QC analysis in the range of 82.5 wt% to 96.0 wt%, preferably in the range of 84.0 wt% to 95.5 wt%, and

[0046] - The content of soluble fraction (SF) determined according to CRYSTEX QC analysis in the range of 4.0 wt% to 17.5 wt%, preferably in the range of 4.5 wt% to 16.0 wt%, wherein

[0047] The crystalline fraction (CF) has a concentration in the range of 1.0 wt% to 12.5 wt%, preferably in the range of 1.5 wt% to 11.0 wt%, through quantitative analysis. 13 Ethylene content (C2(CF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy; and

[0048] - The soluble fraction (SF) has an intrinsic viscosity (iV(SF)) in the range of 0.9 dl / g to less than 2.5 dl / g, preferably in the range of 1.0 dl / g to 2.3 dl / g, and more preferably in the range of 1.1 dl / g to 2.2 dl / g;

[0049] The first propylene homopolymer (B) has

[0050] A melt flow rate MFR2 (230°C, 2.16 kg, ISO 1133) of -500 g / 10 min to 1100 g / 10 min, preferably 650 g / 10 min to 1000 g / 10 min, more preferably 750 g / 10 min to 900 g / 10 min; and

[0051] The second propylene homopolymer (C) has

[0052] Melt flow rate MFR2 (230°C, 2.16 kg, ISO 1133) of -80 g / 10 min to 200 g / 10 min, preferably 100 g / 10 min to 175 g / 10 min, more preferably 120 g / 10 min to 150 g / 10 min; and

[0053] A tensile modulus of -1500 MPa to 2100 MPa, preferably 1550 MPa to 2000 MPa, and more preferably 1600 MPa to 1900 MPa, and

[0054] The composition has

[0055] Melt flow rate MFR2 (230°C, 2.16 kg, ISO 1133) of 50 g / 10 min to 100 g / 10 min, preferably 55 g / 10 min to 95 g / 10 min, more preferably 60 g / 10 min to 90 g / 10 min.

[0056] The compositions according to the invention suitable for automotive applications are particularly suitable for molding articles, such as injection molding of articles, or fiber-reinforced composites for vehicle exterior parts.

[0057] The compositions according to the present invention have one or more of the following characteristics:

[0058] The composition has a melt flow rate MFR2 (230°C, 2.16 kg, ISO 1133) of 50 g / 10 min to 100 g / 10 min, preferably 55 g / 10 min to 95 g / 10 min, and more preferably 60 g / 10 min to 90 g / 10 min.

[0059] The composition can be characterized by CRYSTEX QC analysis. In CRYSTEX QC analysis, crystalline fraction (CF) and soluble fraction (SF) are obtained, and the crystalline fraction (CF) and soluble fraction (SF) can be quantified and analyzed in terms of monomer and comonomer content and intrinsic viscosity (iV).

[0060] The composition preferably exhibits one or all of the following properties in CRYSTEX QC analysis:

[0061] - The content of crystallization fraction (CF) determined according to CRYSTEX QC analysis in the range of 90.0 wt% to 97.5 wt%, preferably in the range of 92.5 wt% to 95.0 wt%, and

[0062] - The soluble fraction (SF) content, as determined by CRYSTEX QC analysis, is in the range of 2.5 wt% to 10.0 wt%, preferably in the range of 5.0 wt% to 7.5 wt%.

[0063] The crystal fraction (CF) preferably has one or more, preferably all of the following properties:

[0064] -1.5 wt% to 9.0 wt%, preferably 3.0 wt% to 4.5 wt%, by quantitative determination 13 Ethylene content (C2(CF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy; and / or

[0065] Intrinsic viscosity (iV(CF)) in naphthalene measured at 135°C according to DIN ISO 1628 / 1, ranging from -1.00 dl / g to 2.00 dl / g, preferably from 1.10 dl / g to 1.50 dl / g.

[0066] The soluble fraction (SF) preferably has one or more, preferably all of the following properties:

[0067] - In the range of 10.0 wt% to 25.0 wt%, preferably 12.5 wt% to 21.0 wt%, by quantitative determination 13 Ethylene content (C2(SF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy; and / or

[0068] The intrinsic viscosity (iV(SF)) in naphthalene measured at 135 °C according to DIN ISO 1628 / 1, ranging from -0.50 dl / g to 1.50 dl / g, preferably from 0.80 dl / g to 1.20 dl / g.

[0069] The composition preferably comprises 1.0% to 10.0% by weight, more preferably 2.0% to 7.5% by weight, and even more preferably 3.5% to 5.0% by weight of ethylene-derived units.

[0070] Further, the composition preferably has an intrinsic viscosity (iV(Comp)) of 1.00 dl / g to 2.00 dl / g, more preferably 1.10 dl / g to 1.75 dl / g, and even more preferably 1.20 dl / g to 1.50 dl / g.

[0071] The compositions according to the invention preferably exhibit an excellent balance of performance in terms of impact properties, flowability (as can be seen from the melt flow rate described above), and especially mechanical properties (e.g., tensile modulus or other tensile properties).

[0072] The composition preferably has a tensile modulus from 1350 MPa to 1750 MPa, more preferably from 1400 MPa to 1600 MPa.

[0073] Furthermore, the composition preferably has a tensile strain at a tensile strength of 3.5% to 8.0%, more preferably 4.0% to 7.5%.

[0074] Furthermore, the composition preferably has a yield tensile strain of 4.5% to 8.0%, more preferably 5.0% to 7.5%.

[0075] Furthermore, the composition preferably has a tensile strength of 20 MPa to 40 MPa, more preferably 25 MPa to 35 MPa.

[0076] Furthermore, the composition preferably has a tensile stress at break ranging from 25 MPa to 40 MPa, more preferably from 27 MPa to 35 MPa.

[0077] In addition, the composition preferably has a nominal tensile strain at break of 5.0% to 12.5%, more preferably 5.5% to 10.0%.

[0078] In terms of impact performance, the composition preferably has a strength of 1.5 kJ / m. 2 Up to 5.0 kJ / m 2 Preferred from 2.0 kJ / m 2 Up to 4.0 kJ / m 2 Notched impact strength of a simply supported beam at 23°C (CNIS at 23°C).

[0079] Furthermore, the composition preferably has a strength of 1.0 kJ / m 2 Up to 3.0 kJ / m 2 Preferred from 1.2 kJ / m 2 Up to 2.5 kJ / m2 Notched impact strength of a simply supported beam at -20℃ (CNIS at -20℃).

[0080] The compositions of the present invention must include components (A), (B), and (C), which are present in the amounts described above or below.

[0081] The composition may optionally include additional polymer components, such that the composition can be obtained by blending components (A), (B), (C) and one or more of the following components (D).

[0082] (D) 0% to 20% by weight, preferably 0% to 15% by weight, more preferably 0% to 13% by weight of third propylene homopolymer;

[0083] All percentages are relative to the total composition, and the third propylene homopolymer (D) has

[0084] Melt flow rate MFR2 (230°C, 2.16 kg, ISO 1133) of -10 g / 10 min to 40 g / 10 min, preferably 12 g / 10 min to 30 g / 10 min, more preferably 15 g / 10 min to 25 g / 10 min; and

[0085] Tensile modulus of -2000MPa to 2500MPa, preferably 2100MPa to 2400MPa, more preferably 2150MPa to 2300MPa.

[0086] In one embodiment, the composition can be obtained by blending components (A), (B), and (C), and (D) is absent.

[0087] (A) 25% to 75% by weight, preferably 35% to 65% by weight, more preferably 40% to 60% by weight of mixed plastic polypropylene blends;

[0088] (B) 17% to 65% by weight, preferably 20% to 55% by weight, more preferably 25% to 50% by weight, of a first propylene homopolymer; and

[0089] (C) 3% to 30% by weight, preferably 5% to 27% by weight, more preferably 7% to 25% by weight of a second propylene homopolymer

[0090] All percentages are relative to the total composition.

[0091] In another embodiment, the composition can be obtained by blending components (A), (B), (C), and (D).

[0092] (A) 25% to 75% by weight, preferably 35% to 65% by weight, more preferably 40% to 60% by weight of mixed plastic polypropylene blends;

[0093] (B) 17% to 55% by weight, preferably 20% to 45% by weight, more preferably 25% to 40% by weight of a first propylene homopolymer;

[0094] (C) 3% to 30% by weight, preferably 5% to 27% by weight, more preferably 7% to 25% by weight, of a second propylene homopolymer; and

[0095] (D) 1% to 20% by weight, preferably 2% to 15% by weight, more preferably 3% to 13% by weight of a third propylene homopolymer.

[0096] All percentages are relative to the total composition.

[0097] Mixed plastic polypropylene blend (A)

[0098] The blended polypropylene plastic (A) was appropriately characterized by CRYSTEX QC analysis. In CRYSTEX QC analysis, crystalline fraction (CF) and soluble fraction (SF) are obtained, and the crystalline fraction (CF) and soluble fraction (SF) can be quantified and analyzed in terms of monomer and comonomer content and intrinsic viscosity (iV).

[0099] The blend of polypropylene (A) exhibited the following properties in CRYSTEX QC analysis:

[0100] - The content of crystal fraction (CF), as determined by CRYSTEX QC analysis, is in the range of 82.5 wt% to 96.0 wt%, preferably in the range of 84.0 wt% to 95.5 wt%, and more preferably in the range of 85.0 wt% to 95.0 wt%.

[0101] - The soluble fraction (SF) content, as determined by CRYSTEX QC analysis, is in the range of 4.0 wt% to 17.5 wt%, preferably in the range of 4.5 wt% to 16.0 wt%, and more preferably in the range of 5.0 wt% to 15.0 wt%.

[0102] The crystal fraction (CF) has one or more, preferably all of the following properties:

[0103] - Through quantitative methods 13Ethylene content (C2(CF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy in the range of 1.0 wt% to 12.5 wt%, preferably in the range of 1.5 wt% to 11.0 wt%, and more preferably in the range of 2.0 wt% to 10.0 wt%; and / or

[0104] - The intrinsic viscosity (iV(CF)) in naphthalene, as measured according to DIN ISO 1628 / 1 at 135°C, is preferably in the range of 1.0 dl / g to less than 2.6 dl / g, more preferably in the range of 1.2 dl / g to 2.5 dl / g, and even more preferably in the range of 1.3 dl / g to 2.4 dl / g.

[0105] The soluble fraction (SF) has one or more, preferably all of the following properties:

[0106] - Through quantitative methods 13 The ethylene content (C2(SF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy is preferably in the range of 20.0 wt% to 55.0 wt%, more preferably in the range of 22.0 wt% to 50.0 wt%, and even more preferably in the range of 24.0 wt% to 48.0 wt%; and / or

[0107] - The intrinsic viscosity (iV(SF)) in naphthalene, measured at 135°C according to DIN ISO 1628 / 1, in the range of 0.9 dl / g to 2.5 dl / g, preferably in the range of 1.0 dl / g to 2.3 dl / g, and more preferably in the range of 1.1 dl / g to 2.2 dl / g.

[0108] Preferably, the mixed plastic polypropylene blend (A) includes polypropylene and polyethylene.

[0109] The preferred weight ratio of polypropylene to polyethylene is from 19:1 to 7:3.

[0110] The mixed plastic polypropylene blend (A) preferably includes more than 50 mol% of propylene-derived units.

[0111] The mixed plastic polypropylene blend (A) preferably includes 5.0% to 17.5% by weight, more preferably 6.0% to 15.0% by weight, and even more preferably 7.5% to 13.0% by weight of ethylene-derived units.

[0112] Furthermore, the mixed plastic polypropylene blend (A) preferably has one or more, preferably all of the following properties:

[0113] Melt flow rate MFR2 (230°C, 2.16 kg, ISO 1133) of -6.0 g / 10 min to 40 g / 10 min, preferably 8.0 g / 10 min to 35 g / 10 min, more preferably 9.0 g / 10 min to 30 g / 10 min; and / or

[0114] -2.0Pa -1 Up to 5.0 Pa -1 2.2 Pa is preferred. -1 Up to 4.5 Pa -1 More preferably 2.5Pa -1 up to 4.0 Pa -1 The multi-dispersion index PI; and / or

[0115] - From 1000 kPa·s to 5000 kPa·s, preferably from 1200 kPa·s to 4500 kPa·s, more preferably from 1400 kPa·s to 4000 kPa·s at 0.05 rad / s eta 0.05 Complex viscosity; and / or

[0116] -100 kPa·s to 500 kPa·s, preferably from 150 kPa·s to 400 kPa·s, and more preferably from 175 kPa·s to 300 kPa·s at 300 rad / s eta 300 Complex viscosity; and / or

[0117] -905kg / m 3 Up to 930kg / m 3 Preferred from 910kg / m 3 Up to 925kg / m 3 More preferably, from 913 kg / m 3 Up to 922kg / m 3 The density; and / or

[0118] - Limonene content from 0.1 ppm to 50 ppm, determined by solid-phase microextraction (HS-SPME-GC-MS); and / or

[0119] - Tensile modulus from 1000 MPa to 1500 MPa, preferably from 1100 MPa to 1400 MPa; and / or

[0120] -From 3.0kJ / m 2 Up to 7.5 kJ / m 2 Preferred from 4.0 kJ / m 2 Up to 7.0 kJ / m 2 Notched impact strength of a simply supported beam at 23°C (CNIS at 23°C).

[0121] The polypropylene blends according to the present invention are preferably in granular form. Granulation helps to reduce the content of volatile substances.

[0122] First propylene homopolymer (B)

[0123] The first propylene homopolymer (B) has a very high melt flow rate MFR2 (230°C, 2.16 kg, ISO 1133) of 500 g / 10 min to 1100 g / 10 min, preferably 650 g / 10 min to 1000 g / 10 min, and more preferably 750 g / 10 min to 900 g / 10 min.

[0124] Preferably, the first propylene homopolymer (B) has a melting temperature of 150°C to 170°C, more preferably 155°C to 166°C.

[0125] Furthermore, the first propylene homopolymer (B) preferably has a narrow polydispersity index, measured as the ratio of weight-average molecular weight to number-average molecular weight (Mw / Mn), of less than 7.0, for example from 2.0 to 6.5, more preferably from 3.5 to 5.5.

[0126] Furthermore, the first propylene homopolymer (B) has a tensile modulus from 1000 MPa to 1800 MPa, preferably from 1200 MPa to 1700 MPa, and more preferably from 1300 MPa to 1600 MPa.

[0127] The presence of the first propylene homopolymer (B) ensures a high melt flow rate in the final composition.

[0128] This propylene homopolymer is commercially available.

[0129] Second propylene homopolymer (C)

[0130] The second propylene homopolymer (C) has a lower melt flow rate (230°C, 2.16 kg, ISO 1133) than the first propylene homopolymer (B), ranging from 80 g / 10 min to 200 g / 10 min, preferably from 100 g / 10 min to 175 g / 10 min, and more preferably from 120 g / 10 min to 150 g / 10 min.

[0131] The second propylene homopolymer (C) has a tensile modulus from 1500 MPa to 2100 MPa, preferably from 1550 MPa to 2000 MPa, and more preferably from 1600 MPa to 1900 MPa.

[0132] Furthermore, the second propylene homopolymer (C) preferably has one or more, preferably all of the following properties:

[0133] - Tensile strength from 25 MPa to 50 MPa, preferably from 30 MPa to 40 MPa; and / or

[0134] - Nominal tensile strain at break from 5.0% to 8.0%, preferably from 6.0% to 7.0%; and / or

[0135] - Fracture tensile stress from 30 MPa to 50 MPa, preferably from 35 MPa to 45 MPa; and / or

[0136] - Heat distortion temperature B (HDT B) from 80°C to 100°C, preferably from 83°C to 95°C; and / or

[0137] -From 0.5kJ / m 2 Up to 1.5 kJ / m 2 The preferred value is 0.7 kJ / m 2 Up to 1.2 kJ / m 2 Notched impact strength of a simply supported beam at 23°C (CNIS, 23°C); and / or

[0138] -From 0.4kJ / m 2 Up to 1.4 kJ / m 2 Preferred from 0.6 kJ / m 2 Up to 1.1 kJ / m 2 Notched impact strength of a simply supported beam at -20°C (CNIS, -20°C); and / or

[0139] -From 0.3kJ / m 2 Up to 1.3 kJ / m 2 Preferred from 0.5 kJ / m 2 Up to 1.0 kJ / m 2 Notched impact strength of a simply supported beam at -30℃ (CNIS, -30℃).

[0140] Therefore, tensile properties were measured according to ISO 527-2 at 50 mm / min, HDT was measured according to ISO 75-2 at 0.45 MPa, and CNIS was measured according to ISO 179 / leA.

[0141] This propylene homopolymer is commercially available.

[0142] additive

[0143] Additives are typically used in the compositions according to the invention. Preferably, the additives are selected from one or more antioxidants, UV stabilizers, slip agents, nucleating agents, pigments, lubricants, masterbatch polymers, and / or antifogging agents.

[0144] Based on the total composition, the additives are typically present in the composition in an amount from 0.01% by weight to 4.0% by weight, preferably from 0.05% by weight to 3.0% by weight.

[0145] Third propylene homopolymer (D)

[0146] The optional third propylene homopolymer (D) preferably has the lowest melt flow rate MFR2 (230°C, 2.16 kg, ISO 1133) among the three propylene homopolymers (B), (C) and (D) of 10 g / 10 min to 40 g / 10 min, more preferably 12 g / 10 min to 30 g / 10 min, and more preferably 15 g / 10 min to 25 g / 10 min.

[0147] The optional third propylene homopolymer (D) preferably has a higher tensile modulus than the second propylene homopolymer (C). The tensile modulus of the optional third propylene homopolymer (D) is measured at 1 mm / min according to ISO 527-2, preferably from 2000 MPa to 2500 MPa, more preferably from 2100 MPa to 2400 MPa, and more preferably from 2150 MPa to 2300 MPa.

[0148] Furthermore, the optional third propylene homopolymer (D) preferably has one or more, preferably all of the following properties:

[0149] - Tensile strength from 25 MPa to 50 MPa, preferably from 30 MPa to 40 MPa; and / or

[0150] - Yield tensile strain from 4.0% to 8.0%, preferably from 5.0% to 7.0%; and / or

[0151] - Tensile stress from 30 MPa to 50 MPa, preferably from 35 MPa to 45 MPa; and / or

[0152] - Heat distortion temperature B (HDT B) from 100°C to 130°C, preferably from 110°C to 120°C; and / or

[0153] -From 1.0kJ / m 2 Up to 4.0 kJ / m 2 Preferred from 1.5 kJ / m 2 Up to 3.5 kJ / m 2 Notched impact strength of a simply supported beam at 23°C (CNIS, 23°C).

[0154] Therefore, tensile properties were measured according to ISO 527-2 at 50 mm / min, HDT was measured according to ISO 75-2 at 0.45 MPa, and CNIS was measured according to ISO 179 / leA.

[0155] The optional third propylene homopolymer (D) is preferably nucleated, more preferably nucleated by poly(vinylcyclohexane), as described in EP 2960 279B1.

[0156] This propylene homopolymer is typically added to further improve the mechanical properties of the composition.

[0157] This propylene homopolymer is commercially available.

[0158] Products

[0159] In another aspect, the present invention relates to an article comprising a composition, preferably a molded article or a fiber-reinforced composite material, more preferably an automotive article comprising the composition as described above or below.

[0160] This product is preferably used on the exterior of vehicles.

[0161] In one embodiment, the composition of the article may include fibers, such as glass fibers. When fibers are present in the composition of the article, the amount of fibers, based on the composition of the article, ranges from 25% to 70% by weight.

[0162] use

[0163] In another aspect, the present invention relates to the use of the compositions described above or below in the production of articles, preferably automotive articles, more preferably exterior automotive articles.

[0164] In one embodiment, the composition for producing the article may include fibers, such as glass fibers. When fibers are present in the composition of the article, the amount of fibers, based on the composition of the article, ranges from 25% to 70% by weight.

[0165] Experimental Section

[0166] The following embodiments are included to illustrate some aspects and embodiments of the invention as described in the claims. However, those skilled in the art should understand that the following description is merely exemplary and should not be construed as limiting the invention in any way.

[0167] Test methods

[0168] a)CRYSTEX

[0169] Determination of crystallization and soluble fractions and their respective properties (IV and ethylene content)

[0170] The crystallization (CF) and soluble fraction (SF) of polypropylene (PP) compositions, as well as the comonomer content and intrinsic viscosity of each component, were analyzed using a CRYSTEX Polymer Char instrument (Valencia, Spain). Detailed information on this technique and method can be found in the literature (Ljiljana Jeremie, Andreas Albrecht, Martina Sandholzer & Markus Gahleitner (2020) Rapid characterization of high-impact ethylene-propylene copolymer composition by crystallization extraction separation: comparison to standard separation methods, International Journal of Polymer Analysis and Characterization, 25:8, 581-596).

[0171] The crystalline and amorphous fractions were separated by temperature cycling of dissolution at 160 °C, crystallization at 40 °C, and redissolution in 1,2,4-trichlorobenzene at 160 °C. Quantification of SF and CF and determination of ethylene content (C2) were achieved using an integrated infrared detector (IR4), and intrinsic viscosity (iV) was determined using an online 2-capillary viscometer.

[0172] The IR4 detector is used to measure two different wavelengths (CH3 stretching vibration, centered at approximately 2960 cm⁻¹). -1 ) and CH stretching vibration (2700cm) -1 Up to 3000cm -1 A multi-wavelength detector for IR absorbance is used to determine the concentration and ethylene content in ethylene-propylene copolymers. The IR4 detector is calibrated with a series of 8EP copolymers with known ethylene contents ranging from 2% to 69% by weight (via...). 13 (C-NMR determination), and the concentration of each copolymer was in the range of 2 mg / ml and 13 mg / ml. To simultaneously satisfy both characteristics of the various polymer concentrations expected during Crystex analysis, concentration and ethylene content, the following calibration equation was applied:

[0173] Conc=a+b*Abs(CH)+c*(Abs(CH)) 2 +d*Abs(CH3)+e*(Abs(CH3) 2 +f*Abs(CH)*Abs(CH3) (Equation 1)

[0174] CH3 / 1000C=a+b*Abs(CH)+c*Abs(CH3)+d*(Abs(CH3) / Abs(CH))+e*(Abs(CH3) / Abs(CH)) 2 (Equation 2)

[0175] The constants a to e in equation 1 and the constants a to f in equation 2 were determined using least squares regression analysis.

[0176] Use the following relationship to convert CH3 / 1000C to ethylene content (in weight %):

[0177] Weight % (ethylene in EP copolymer) = 100 - CH3 / 1000TC * 0.3 (Equation 3)

[0178] The amounts of soluble fraction (SF) and crystalline fraction (CF) were correlated with the amount of xylene cold solubles (XCS) and xylene cold insolubles (XCI) fractions via XS calibration, determined according to the gravimetric method of ISO 16152. XS calibration was achieved by testing various EP copolymers with XS contents ranging from 2% to 31% wt%. The determined XS calibration was linear.

[0179] Weight % XS = 1.01 * Weight % SF (Equation 4)

[0180] The intrinsic viscosity (iV) of the parent EP copolymer, along with its soluble and crystalline fractions, was determined using an online 2-capillary viscometer and correlated with the corresponding iV determined according to ISO 1628-3 in naphthalene by a standard method. Calibration was performed using various EP and PP copolymers, with iV = 2–4 dL / g. The determined calibration curves were linear.

[0181] iV(dL / g)=a*Vsp / c (Equation 5)

[0182] Weigh the sample to be analyzed at a concentration of 10 mg / ml to 20 mg / ml. To avoid injecting possible gels and / or polymers (such as PET and PA) that are insoluble in TCB at 160°C, place the weighed sample into a stainless steel mesh with a MW 0.077 / D 0.05 mm diameter.

[0183] After automatically filling 1,2,4-TCB containing 250 mg / L of 2,6-tert-butyl-4-methylphenol (BHT) as an antioxidant, the sample was dissolved at 160 °C until completely dissolved, typically for 60 minutes, with continuous stirring at 400 rpm. To prevent sample degradation, the polymer solution was covered with nitrogen gas during the dissolution process.

[0184] A specified volume of sample solution is injected into a column packed with an inert support, where crystallization of the sample and separation of the soluble and crystalline fractions occur. This process is repeated twice. During the first injection, the entire sample is measured at high temperature, and the iV [dl / g] and C2 [wt%] of the PP composition are determined. During the second injection, the soluble fraction (at low temperature) and the crystalline fraction (at high temperature) in the crystallization cycle are measured (wt% SF, wt% C2, iV).

[0185] b) Xylene cold soluble fraction (XCS, wt%)

[0186] Xylene cold soluble fraction (XCS) was determined at 25°C according to ISO 16152; first edition; July 1, 2005. The portion that remains insoluble is the xylene cold insoluble fraction (XCI).

[0187] c) Intrinsic viscosity

[0188] Intrinsic viscosity was determined according to DIN ISO 1628 / 1, October 1999 (in naphthalene at 135°C).

[0189] d) Notched impact strength of simply supported beam

[0190] According to ISO 179-1eA, the preparation of 80×10×4mm steel according to EN ISO 1873-2 at +23℃ and -20℃. 3 The injection-molded specimens were tested. The measurements were performed after the specimens had been conditioned at 23°C for 96 hours.

[0191] e) Tensile properties

[0192] Tensile properties (tensile modulus, tensile strain at break, tensile strength, tensile strain at yield, tensile strain at break, tensile stress at break) were measured using injection-molded specimens 1B (dog bone shape, 4 mm thickness) prepared as described in EN ISO 1873-2, according to ISO 527-2 (crosshead speed = 1 mm / min; test speed 50 mm / min, 23 °C). The specimens were conditioned at 23 °C for 96 hours before measurement.

[0193] f) Comonomer content

[0194] Poly(propylene-co-ethylene)-ethylene content-IR spectroscopy

[0195] The ethylene content of poly(ethylene-co-propylene) copolymers was quantified using quantitative infrared (IR) spectroscopy, a primary calibration method. This was achieved through quantitative... 13A set of internal, non-commercial calibration standards for determining known ethylene content by C10 solution-state nuclear magnetic resonance (NMR) spectroscopy is used to facilitate calibration. Calibration procedures are performed in a conventional manner as detailed in the literature. The calibration kit consists of 38 calibration standards with ethylene contents ranging from 0.2 wt% to 75.0 wt%, produced under various conditions in pilot-scale or full-scale conditions. The calibration set is selected to reflect the typical copolymer types encountered by the final quantitative IR spectroscopy method.

[0196] Quantitative IR spectra were recorded in solid state using a Bruker Vertex 70 FTIR spectrometer. Spectra were recorded on 25×25 mm square films with a thickness of 300 μm, prepared by compression molding at 180 °C to 210 °C and 4 MPa to 6 MPa. For samples with very high ethylene content (>50 mol%), 100 μm thick films were used. Standard transmission FTIR spectroscopy was employed, with a spectral range of 5000 nm. -1 Up to 500cm -1 Aperture size of 6mm and spectral resolution of 2cm -1 Background scans 16 times, spectral scans 16 times, zero-fill factor of interferogram 64, and Blackman-Harris three-phase apodization. Using (CH2) >2 Structural element (integral method G, limit 762cm) -1 and 694cm -1 730cm -1 and 720cm -1 (A Q Quantitative analysis was performed on the total area of ​​CH2 rocking deformation at the location ( ). The quantitative bands were normalized to correspond to the CH structural units (integration method G, limit 4650 cm⁻¹). -1 4007cm -1 ) of 4323cm -1 (A R The area of ​​the CH band at () was then calculated using a secondary calibration curve based on the normalized absorbance (A). Q / A R The ethylene content, expressed as a weight percentage, is predicted. The calibration curves were previously constructed using ordinary least squares (OLS) regression on the normalized absorbance and major comonomer content measured on the calibration set.

[0197] Poly(propylene-co-ethylene)-ethylene content- 13 C NMR spectroscopy

[0198] Adopting 1 H and 13 C was recorded quantitatively in solution using a Bruker Advance III 400 NMR spectrometer operating at 400.15 MHz and 100.62 MHz, respectively. 13 C{1 ¹H NMR spectroscopy. Nitrogen gas was used in all pneumatic devices at 125°C, utilizing… 13 All spectra were recorded using a C-optimized 10mm extended temperature probe. Approximately 200 mg of the material was dissolved together with chromium acetylacetone (Cr(acac)3) in 3 ml of 1,2-tetrachloroethane-d2 (TCE-d2) to obtain a 65 mM solution of the relaxant in the solvent (Singh, G., Kothari, A., Gupta, V., Polymer Testing 28 5 (2009), 475).

[0199] To ensure a homogeneous solution, the NMR tube was further heated in a rotary oven for at least 1 hour after the initial sample preparation in the heating block. After inserting the magnet, the tube was rotated at 10 Hz. This setup was chosen primarily for high resolution and because accurate ethylene content quantification was quantitatively required. Standard single-pulse excitation without NOE was employed, using an optimized sharp angle, a 1-s cycle delay, and a double-layer WALTZ16 decoupling scheme (Zhou, Z. et al., J. Mag. Reson. 187 (2007) 225, and Busico, V. et al., Macromol. Rapid Commun. 2007, 28, 1128). A total of 6144 (6 k) transient values ​​were obtained for each spectrum. For quantification... 13 C{ 1 The ¹H NMR spectra were processed, integrated, and the relevant quantitative properties were determined from the integration. 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 method allows for comparable references even if the structural unit is not present. Characteristic signals corresponding to the incorporation of ethylene can be observed (Cheng, HN, Macromolecules 17 (1984), 1950). The comonomer composition was calculated as the ethylene content in the polymer relative to the content of all monomers in the polymer: fE = (E / (P+E)). The method of Wang et al. (Wang, WJ., Zhu, S., Macromolecules 33 (2000), 1157) was used to determine the quantitative properties. 13 C{ 1The integral of multiple signals across the entire spectral region in the H} spectrum quantifies the comonomer fraction. This method was chosen because of its robustness and ability to account for regional defects when needed. The integration region was slightly adjusted to improve applicability across the entire range of comonomer contents encountered. For systems with very low ethylene content where only isolated ethylene is observed in the PPEPP sequence, the method of Wang et al. was modified to reduce the influence of integrating sites that no longer exist. This method reduces the overestimation of ethylene content in such systems and achieves this by reducing the number of sites used to determine the absolute ethylene content: E = 0.5(Sββ + Sβγ + Sβδ + 0.5(Sαβ + Sαγ)). With the use of this set of sites, the corresponding integral equation becomes: E = 0.5(I H +I G +0.5(I C +I D The same notation used is employed in the article by Wang et al. (Wang, WJ., Zhu, S., Macromolecules 33 (2000), 1157). The equation for absolute propylene content has not been modified. The molar percentage of comonomer incorporated from the molar fraction is calculated as follows: E[mol%] = 100 * fE. The weight percentage of comonomer incorporated from the molar fraction is calculated as follows: E[wt%] = 100 * (fE * 28.06) / ((fE * 28.06) + ((1 - fE) * 42.08)).

[0200] Comonomer content

[0201] Content was determined using the film thickness method, which uses the quantitative band strength I(q) and the thickness T of the pressed film, with the following relationship: [I(q) / T]m + c = C, where m and c are determined by the ratio of the content obtained from the film thickness method. 13 The coefficients were determined by constructing a calibration curve based on the comonomer content obtained from C-NMR spectroscopy.

[0202] Using a Nicolet Magna 550IR spectrometer along with Nicolet Omnic FTIR software, based on... 13 Comonomer content was measured using a known method of C-NMR-calibrated Fourier transform infrared spectroscopy (FTIR). A thin film approximately 250 μm thick was formed from the sample. A similar film was prepared from a calibration sample with a known comonomer content. Comonomer content was determined using wavenumbers in the range of 1430 cm⁻¹. -1 Up to 1100cm -1 The spectroscopic determination is performed. Absorbance is measured as the peak height by selecting a so-called short baseline, long baseline, or both. The short baseline passes through a minimum point at approximately 1410 cm⁻¹. -1 Up to 1320cm -1The drawing is located at approximately 1410cm. -1 Up to 1220cm -1 The baselines are plotted between each other. Specific calibration is required for each baseline type. Furthermore, the comonomer content of the unknown sample falls within the range of the comonomer content of the calibrated sample.

[0203] g)MFR

[0204] Melt flow rate is measured at 230°C (polypropylene-based materials) or 190°C (polyethylene-based materials) with a load of 2.16 kg (MFR2). Melt flow rate is the amount of polymer (in grams) extruded in 10 minutes at 230°C (or 190°C) with a load of 2.16 kg using test equipment standardized according to ISO 1133.

[0205] h) Density

[0206] Density was measured according to ISO 1183-187. Samples were prepared by compression molding according to ISO 1872-2:2007.

[0207] i) Rheological parameters

[0208] The polymer melt, characterized by dynamic shear testing, conformed to ISO standards 6721-1 and 6721-10. The measurements were performed in an Anton Paar MCR501 stress-controlled rotational rheometer equipped with a 25 mm parallel plate geometry. Tests were conducted on compression-molded plates under a nitrogen atmosphere and strain within the linear viscoelastic range. Oscillatory shear tests were performed at 190 °C with frequencies between 0.01 and 600 rad / s and a 1.3 mm gap.

[0209] In dynamic shear tests, the probe undergoes uniform deformation under sinusoidally varying shear strain or shear stress (strain and stress control modes, respectively). In strain-controlled experiments, the probe experiences sinusoidal strain, which can be expressed as follows:

[0210] γ(t) = γ0 sin(ωt) (1)

[0211] If the applied strain is within the linear viscoelastic range, the resulting sinusoidal stress response can be given by the following equation.

[0212] σ(t) = σ0 sin(ωt +δ) (2)

[0213] Where σ0 and γ0 are the stress and strain amplitudes, respectively; ω is the angular frequency; δ is the phase shift (the loss angle between the applied strain and the stress response); and t is time.

[0214] Dynamic test results are typically expressed by several different rheological functions, namely shear storage modulus G', shear loss modulus G”, complex shear modulus G*, complex shear viscosity η*, dynamic shear viscosity η', the non-phase component of complex shear viscosity η”, and loss tangent tanη, which can be represented as follows:

[0215]

[0216]

[0217] G*=G'+iG“[Pa] (5)

[0218] η*=η'-iη"[Pa·s] (6)

[0219]

[0220]

[0221] The determination of the so-called shear thinning index is related to MWD but independent of Mw, as described in Equation 9.

[0222]

[0223] For example, SHI (2.7 / 210) It is defined by dividing the complex viscosity value (in Pa·s) measured for a G* value equal to 2.7 kPa by the complex viscosity value (in Pa·s) measured for a G* value equal to 210 kPa.

[0224] The values ​​of storage modulus (G'), loss modulus (G"), complex modulus (G*), and complex viscosity (η*) are obtained as functions of frequency (ω).

[0225] Therefore, for example, η* 300rad / s (eta* 300rad / s η* is used as an abbreviation for complex viscosity at a frequency of 300 rad / s. 0.05rad / s (eta*0.05rad / s) is used as an abbreviation for complex viscosity at a frequency of 0.05rad / s.

[0226] The loss tangent tan(δ) is defined as the ratio of the loss modulus (G") to the storage modulus (G') at a given frequency. Therefore, for example, tan... 0.05 Tandem is used as an abbreviation for the ratio of loss modulus (G") to storage modulus (G') at 0.05 rad / s. 300 Used as an abbreviation for the ratio of loss modulus (G") to energy storage modulus (G') at 300 rad / s.

[0227] Elastic balance tan 0.05 / tan 300 Defined as the loss tangent tan0.05 and the loss tangent tan 300 The ratio.

[0228] In addition to the rheological functions mentioned above, other rheological parameters can be determined, such as the so-called elasticity index EI(x). The elasticity index Ei(x) is the value of the storage modulus G' determined by the value of the loss modulus G” for x kPa, and can be described by Equation 10.

[0229] EI(x)=G′ for (G″=x kPa)[Pa] (10)

[0230] For example, EI(5kPa) is limited by the value of the energy storage modulus G', which is determined for a value of G” equal to 5kPa.

[0231] The polydispersity index PI is defined by equation 11.

[0232]

[0233] Where, ω COP It is the cross angular frequency, determined by the angular frequency at which the energy storage modulus G' equals the loss modulus G".

[0234] These values ​​are determined using a single-point interpolation procedure, as defined in the Rheoplus software. If a given G* value is not achieved experimentally, it is determined by extrapolation using the same procedure as before. In both cases (interpolation or extrapolation), the options "Interpolate y-values ​​to x-values ​​based on parameters" and "Logarithmic interpolation type" in Rheoplus are applied.

[0235] References:

[0236] [1] "Rheological characterization of polyethylene fractions", Heino, EL, Lehtinen, A., Tanner J., J., Neste Oy, Porvoo, Finland, Theor.Appl.Rheol., Proc.Int.Congr.Rheol, 11th (1992), 1, 360-362.

[0237] [2] "The influence of molecular structure on some rheological properties of polyethylene", Heino, EL, Borealis Polymers Oy, Porvoo, Finland, Annual Transactions of the Nordic Rheology Society, 1995.

[0238] [3]“Definition of terms relating to the non-ultimate mechanical properties of polymers”, Pure & Appl. Chem., Vol. 70, No. 3, pp. 701-754, 1998.

[0239] j) Heat distortion temperature (HDT)

[0240] HDT is an 80×10×4mm material prepared according to ISO 1873-2. 3 The test specimens were injection molded and stored at +23°C for at least 96 hours before measurement. The test was conducted on a flat-supported specimen according to ISO 75, Condition B, with a nominal surface stress of 0.45 MPa.

[0241] experiment

[0242] Table 1 shows the properties of polypropylene / polyethylene blends (A-1) and (A-2) suitable as mixed plastic polypropylene blends (A). Since these compositions are derived from a mechanical recycling process, the properties are expressed as a range.

[0243] Table 2 shows the performance of the samples of blends (A-1) and (A-2) used for evaluation.

[0244] As blend A-1, the mixed plastic polypropylene blend Dipolen PP is used, which is commercially available from mtm Plastics GmbH. Dipolen PP is a post-consumer recycled polypropylene-based material with a density (measured according to DIN EN ISO 1183) of 920 kg / m³. 3The melt flow rate (measured according to DIN EN ISO 1133, 230℃ / 2.16kg) is 14.1g / 10min, the moisture content (measured by infrared moisture analyzer, 105℃) is less than 0.1%, the tensile modulus (measured according to DIN EN ISO 527, 1mm / min) is greater than 1100MPa, the yield stress (measured according to DIN EN ISO 527, 50mm / min) is greater than 25MPa, and the tensile strain (measured according to DIN EN ISO 527, 50mm / min) is greater than 180%.

[0245] As blend A-2, the mixed plastic polypropylene blend Purpolen PP is used, which is commercially available from mtm Plastics GmbH. Purpolen PP is a post-consumer recycled polypropylene-based material with a density (measured according to DIN EN ISO 1183) of 916 kg / m³. 3 The melt flow rate (measured according to DIN EN ISO 1133, 230℃ / 2.16kg) is 36g / 10min, the moisture content (measured by infrared moisture analyzer, 105℃) is less than 0.1%, the tensile modulus (measured according to DIN EN ISO 527, 1mm / min) is greater than 1100MPa, the yield stress (measured according to DIN EN ISO 527, 50mm / min) is greater than 24MPa, and the tensile strain (measured according to DIN EN ISO 527, 50mm / min) is greater than 18%.

[0246] Table 1: Properties of polypropylene / polyethylene blends (blends A-1, A-2)

[0247] PP / PE ratio 11：1 11：1 C2 (blend A, total), weight % 8.3-10.0 10-12 limonene >0.1ppm >0.1ppm <![CDATA[MFR2(230℃,ISO 1133),g / 10min]]> 12.0-15.0 10.0-15.0 iV(CF), dl / g 1.8 1.6 C2(CF), weight % 5.7-9.0 7 SF (CRYSTEX), % by weight 8.0-10.3 13.7 iV(SF), dl / g 1.2-1.7 2.1 C2(SF), % by weight 27.0-32.0 32.2 Tensile modulus ISO 527-2, MPa 1200-1280 1303 <![CDATA[Simply supported beam NIS+23°C, ISO 179 1eA, kJ / m 2 > 4.8-5.8 5.6

[0248] Table 2: Properties of the polypropylene / polyethylene blends used for evaluation (blends A-1, A-2)

[0249] Total C2 content (wt%) 9.7 10.6 Limonene content (ppm) 16 nm <![CDATA[MFR2(g / 10min),230℃]]> 14.1 15 <![CDATA[Density (kg / m 3 )]]> 920 916 <![CDATA[PI(Pa -1 )]]> 3.19 2.98 <![CDATA[eta 0.05 (Pa·s)]]> 3215 1527 <![CDATA[eta 300 (Pa·s)]]> 261 208 Soluble fraction (wt%) 8.7 13.7 C2 content (wt%) in soluble fraction 30.1 32.2 C2 content (wt%) in the crystallized fraction 8.4 7.0 Intrinsic viscosity of soluble fraction (dl / g) 1.3 2.1 Intrinsic viscosity of the crystal fraction (dl / g) 1.8 1.6

[0250] PP-Homo 1 is a propylene homopolymer HL708FB with an MFR2 (2.16 kg, 230 °C, ISO 1133) of 800 g / 10 min and a Tm (DSC, ISO 11357-3) of 158 °C. It is commercially available from Borealis AG (Austria) and represents the first propylene homopolymer (B).

[0251] PP-Homo 2 is a propylene homopolymer HK060AE with an MFR2 (2.16 kg, 230 °C, ISO 1133) of 125 g / 10 min and a Tm (DSC, ISO 11357-3) of 158 °C. It is commercially available from Borealis AG (Austria) and represents a second propylene homopolymer (C). Other properties are disclosed in Example CE1 in Table 2 below.

[0252] PP-Homo 3 is a propylene homopolymer HF955MO with an MFR2 (2.16 kg, 230 °C, ISO 1133) of 20 g / 10 min and a tensile modulus of 2200 MPa (ISO 527-2, 1 mm / min). It is commercially available from Borealis AG (Austria) and represents a third propylene homopolymer (D).

[0253] The additive is an antioxidant single packet of pentaerythritol tetrakis(3-(3',5'-di-tert-butyl-4-hydroxyphenyl)propionate and tris(2,4-di-tert-butylphenyl)phosphite in a weight ratio of 1:2.

[0254] The density used is 905 kg / m³ 3 HC001A, with an MFR2 content of 2.7 g / 10 min (measured according to ISO 1133, 2.16 kg, 230 °C) and a crystallization temperature Tc of 112 °C, was used as a homo-PP-based carrier for additives.

[0255] Table 3 shows the composition of the embodiments.

[0256] Table 3: Components of the Embodiments

[0257] Blend A-1 [wt%] - 48.8 48.8 48.8 48.8 48.8 - Blend A-2 [wt%] - - - - - - 48.8 PP Homo 1 [wt%] - 34.7 39.7 37.7 29.7 29.7 29.7 PP Homo 2 [wt%] 100 10.0 10.0 12.0 20.0 10.0 10.0 PP Homo 3 [wt%] - 5.0 - - - 10.0 10.0 Additives [wt%] - 0.3 0.3 0.3 0.3 0.3 0.3 Homo-PP carrier [wt%] - 1.2 1.2 1.2 1.2 1.2 1.2

[0258] Table 4 shows the performance of the embodiments.

[0259] Table 4: Performance of Examples

[0260]

[0261]

[0262] nm = Not measured

[0263] Examples of the present invention illustrate compositions containing about 50% by weight of a blend derived from household waste, exhibiting a high melt flow rate of about 70 g / 10 min and good mechanical properties. The compositions of the present invention demonstrate higher impact strength than comparative example CE1.

[0264] The addition of PP Homo 3 in Examples IE1, IE5 and IE6 further improved tensile properties without compromising high melt flow rates.

[0265] Therefore, the compositions according to the invention demonstrate performance profiles that are particularly suitable for glass fiber applications.

Claims

1. A composition obtainable by blending at least components (A), (B) and (C). (A) 25% to 75% by weight of mixed plastic polypropylene blends; (B) 17% to 65% by weight of the first propylene homopolymer; and (C) 3% to 30% by weight of the second propylene homopolymer, All percentages are relative to the total composition, and the mixed plastic polypropylene blend (A) has -19:1 to 7:3 weight ratio of polypropylene to polyethylene; - The content of crystallization fraction (CF) determined according to CRYSTEX QC analysis in the range of 82.5% to 96.0% by weight, and - The content of soluble fraction (SF) determined by CRYSTEX QC analysis in the range of 4.0 wt% to 17.5 wt%, where - The crystallization fraction (CF) has a quantitative range from 1.0 wt% to 12.5 wt%. 13 Ethylene content (C2(CF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy; and - The soluble fraction (SF) has an intrinsic viscosity (iV(SF)) in the range of 0.9 dl / g to less than 2.5 dl / g. The first propylene homopolymer (B) has Melt flow rate MFR2, measured according to ISO 1133 at 230°C and a load of 2.16 kg, ranging from -500 g / 10 min to 1100 g / 10 min; and The second propylene homopolymer (C) has Melt flow rate MFR2, measured according to ISO 1133 at 230°C and a load of 2.16 kg, from -80 g / 10 min to 200 g / 10 min; and Tensile modulus from -1500MPa to 2100MPa, and The composition has Melt flow rate MFR2, measured according to ISO 1133 at a temperature of 230°C and a load of 2.16 kg, from -50 g / 10 min to 100 g / 10 min.

2. The composition according to claim 1 can be obtained by blending components (A), (B), (C) and component (D). (D) 0% to 20% by weight of third propylene homopolymer; All percentages are relative to the total composition, and the third propylene homopolymer (D) has Melt flow rate MFR2, measured according to ISO 1133 at 230°C and a load of 2.16 kg, ranging from -10 g / 10 min to 40 g / 10 min; and Tensile modulus from -2000MPa to 2500MPa.

3. The composition according to claim 1 can be obtained by blending components (A), (B) and (C), and (D) is absent. (A) 25% to 75% by weight of mixed plastic polypropylene blends; (B) 17% to 65% by weight of the first propylene homopolymer; and (C) 3% to 30% by weight of the second propylene homopolymer, All percentages are relative to the total composition.

4. The composition according to claim 1 or 2 can be obtained by blending components (A), (B), (C), and (D). (A) 25% to 75% by weight of mixed plastic polypropylene blends; (B) 17% to 55% by weight of the first propylene homopolymer; (C) 3% to 30% by weight of the second propylene homopolymer; and (D) 1% to 20% by weight of a third propylene homopolymer, All percentages are relative to the total composition.

5. The composition according to claim 1 or 2, having - The content of crystallization fraction (CF) determined according to CRYSTEX QC analysis in the range of 90.0% to 97.5% by weight, and - The content of soluble fraction (SF) determined by CRYSTEX QC analysis in the range of 2.5 wt% to 10.0 wt%, where - The crystallization fraction (CF) has a content of 1.5 wt% to 9.0 wt% by quantitative analysis. 13 Ethylene content (C2(CF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy; - The crystal fraction (CF) has an intrinsic viscosity (iV(CF)) of 1.00 dl / g to 2.00 dl / g. - The soluble fraction (SF) has a quantitative range from 10.0 wt% to 25.0 wt%. 13 Ethylene content (C2(SF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy; and - The soluble fraction (SF) has an intrinsic viscosity (iV(SF)) of 0.50 dl / g to 1.50 dl / g.

6. The composition according to claim 1 or 2, having ethylene-derived units in an amount from 1.0 wt% to 10.0 wt% based on the weight of the monomer units in the composition.

7. The composition according to claim 1 or 2 has an intrinsic viscosity (iV(Comp)) of 1.00 dl / g to 2.00 dl / g.

8. The composition according to claim 1 or 2, having a tensile modulus from 1350 MPa to 1750 MPa.

9. The composition according to claim 1 or 2, having tensile strain from 3.5% to 8.0% of tensile strength, and / or yield tensile strain from 4.5% to 8.0%, and / or tensile strength from 5.0 MPa to 40 MPa, and / or tensile stress at break from 25 MPa to 40 MPa, and / or nominal tensile strain at break from 5.0% to 12.5%.

10. The composition according to claim 1 or 2, having a concentration of 1.5 kJ / m³ 2 Up to 5.0 kJ / m 2 Notched impact strength of a simply supported beam at 23℃ and / or from 1.0 kJ / m 2 Up to 3.0 kJ / m 2 Notched impact strength of a simply supported beam at -20℃.

11. An article comprising the composition according to any one of claims 1 to 10.

12. The article of claim 11, wherein the article is a molded article.

13. The article of claim 11, wherein the article is a fiber-reinforced composite material.

14. The article of claim 11, wherein the article of claim 11 is an automotive article.

15. The article of any one of claims 11 to 14, wherein the composition further comprises glass fiber.

16. Use of the composition according to any one of claims 1 to 10 for the production of articles.

17. The use according to claim 16, wherein the article is an automotive article.

18. The use according to claim 16, wherein the article is an external automotive article.

19. The use according to any one of claims 16 to 18, wherein the composition further comprises glass fiber.

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