Polypropylene composition suitable for automotive applications

Abstract

A composition suitable for automotive applications can be obtained by blending at least components (A), (B), (C), (D), and (E): (A) 5.0 to 40.0 wt%, preferably 7.0 to 37.5 wt%, more preferably 8.0 to 35.0 wt%, of a first multiphase propylene copolymer; (B) greater than 20.0 to 35.0 wt%, preferably 21.0 to 32.5 wt%, more preferably 22.0 to 31.0 wt%, of a second multiphase propylene copolymer; and (C) 10.0 wt% to 50.0 wt%, preferably 12.0 to 47.5 wt%, more preferably 14.0 to 46.0 wt%. 0 wt% of a mixed plastic polypropylene blend; (D) 2.5 wt% to 15.0 wt%, preferably 3.5 to 12.5 wt%, more preferably 4.0 to 11.0 wt% of a vinyl-based plastic; and (E) 2.5 wt% to less than 12.5 wt%, preferably 3.5 to 12.0 wt%, more preferably 4.0 to 11.0 wt% of an inorganic filler; an article comprising 90 wt% to 100 wt% of the composition described above or below; and the use of the composition described above or below for injection-molded articles, preferably automotive articles, more preferably automotive interior articles.

Description

TECHNICAL FIELD

[0001] The present invention relates to polypropylene compositions particularly suitable for automotive applications, comprising a mixed plastic polypropylene blend and a small amount of inorganic filler. BACKGROUND

[0002] Compositions suitable for the automotive industry usually comprise one or more heterophasic polypropylene copolymers and / or random heterophasic copolymers and usually also some inorganic filler.

[0003] One of the fundamental problems in the polymer industry is recycling. Currently, the market for recyclates, in particular from household waste (usually denoted as PCR (“post-consumer recyclate”)) is somewhat limited. Starting from household waste, the sorting and separation methods employed will not allow to produce pure polymers, i.e. there will always be some contamination, or the method can even result in a blend of different polymers. When it comes to polyolefins, which constitute the vast majority of the polymer fraction of the collected household waste, a complete separation of polypropylene and polyethylene is hardly possible. Recycled polyolefin materials, in particular post-consumer resins, are often cross-contaminated with non-polyolefin materials (e.g. polyethylene terephthalate, polyamide, polystyrene) or non-polymeric substances (like wood, paper, glass or aluminum). Even worse, those post-consumer recycled polyolefin materials are readily available in multi-ton quantities, but unfortunately have limited mechanical properties and often severe odor and / or emission issues.

[0004] For interior applications in the automotive industry, materials are required to have an excellent balance of stiffness / toughness, uniform surface appearance, low scratch visibility and, last but not least, low emissions. In recent years, the market demand has extended to the use of blends of recycled polyolefins with virgin polymers to meet the specific requirements of the final part.

[0005] WO 2022 / 258576 A1, WO 2002 / 258578 A1 and WO 2022 / 034127 A1 all disclose polypropylene compositions suitable for automotive applications, which all comprise one or more heterophasic propylene copolymers, an inorganic filler and a mixed plastic polypropylene blend derived from a recycled stream.

[0006] European patent application EP 4194504 A1 relates to polypropylene compositions for automotive applications, comprising a mixed plastic polypropylene blend (derived from a post-consumer recycled polyolefin stream), an ethylene-based plastomer and an inorganic filler (e.g. talc). These compositions show good emission performance, uniform surface appearance, scratch visibility and impact performance, so that they can replace complex heterophasic polypropylene copolymers in automotive interior applications. However, these compositions comprise a rather high content of 15 wt% of inorganic filler.

[0007] This invention is based on the surprising discovery that by carefully selecting the contents of the original multiphase propylene copolymer components HECO1 and HECO2 with different melt flow rates in a polypropylene composition comprising a mixed plastic polypropylene blend derived from post-consumer recycled polyolefin streams, an ethylene-based plasmid, and inorganic fillers (e.g., talc), the content of inorganic fillers can be significantly reduced without sacrificing any beneficial properties, such as emissions performance, uniform surface appearance, scratch visibility, stiffness, and impact resistance. On the contrary, an excellent balance of performance can be observed, particularly in terms of uniform surface appearance, stiffness, and impact strength. Summary of the Invention

[0008] This invention relates to a composition suitable for automotive applications, which can be obtained by blending at least the following components (A), (B), (C), (D) and (E):

[0009] (A) 5.0 to 40.0 wt%, preferably 7.0 to 37.5 wt%, more preferably 8.0 to 35.0 wt% of a first multiphase propylene copolymer;

[0010] (B) A second multiphase propylene copolymer of more than 20.0 to 35.0 wt%, preferably 21.0 to 32.5 wt%, more preferably 22.0 to 31.0 wt%;

[0011] (C) 10.0 to 50.0 wt%, preferably 12.0 to 47.5 wt%, more preferably 14.0 to 46.0 wt% of mixed plastic polypropylene blends;

[0012] (D) 2.5 wt% to 15.0 wt%, preferably 3.5 to 12.5 wt%, more preferably 4.0 to 11.0 wt% of ethylene-based plastics; and

[0013] (E) 2.5 wt% to less than 12.5 wt%, preferably 3.5 to 12.0 wt%, more preferably 4.0 to 11.0 wt% of inorganic filler;

[0014] All percentages are based on the total amount of the composition, and

[0015] The first multiphase propylene copolymer (A) comprises a matrix phase and an elastomer phase dispersed therein, and the first multiphase propylene copolymer (A) has:

[0016] - Melt flow rate (MFR2) measured according to ISO 1133 at 230°C and 2.16 kg is in the range of 90 to 250 g / 10 min; and

[0017] - The intrinsic viscosity (iV(SF)) of the soluble fraction, as determined by CRYSTEX QC analysis according to DIN ISO 1628 / 1, is in the range of 2.00 to 4.00 dl / g;

[0018] The second multiphase propylene copolymer (B) comprises a matrix phase and an elastomer phase dispersed therein, and has the following characteristics:

[0019] - Melt flow rate (MFR2) measured according to ISO 1133 at 230°C and 2.16 kg is in the range of 3.0 to 30 g / 10 min; and

[0020] - The intrinsic viscosity (iV(SF)) of the soluble fraction, as determined by CRYSTEX QC analysis according to DIN ISO 1628 / 1, is in the range of 4.10 to 10.00 dl / g;

[0021] The blended plastic polypropylene blend (C) has the following characteristics:

[0022] - The crystalline fraction (CF) content, as determined by CRYSTEX QC analysis, is in the range of 85.0 to 96.0 wt%, preferably in the range of 86.5 to 95.5 wt%, and

[0023] - The soluble fraction (SF) content, as determined by CRYSTEX QC analysis, is in the range of 4.0 to 15.0 wt%, preferably in the range of 4.5 to 13.5 wt%, wherein...

[0024] -Crystal fraction (CF) is determined quantitatively. 13 The ethylene content (C2(CF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy is in the range of 1.0 to 10.0 wt%, preferably in the range of 1.5 to 9.5 wt%, and

[0025] - The intrinsic viscosity (iV(SF)) of the soluble fraction (SF) is in the range of 0.9 to 2.1 dl / g, preferably in the range of 1.0 to 2.0 dl / g, and more preferably in the range of 1.1 to 1.9 dl / g;

[0026] The ethylene-based plastic body (D) is a copolymer of ethylene and a comonomer unit selected from α-olefins having 3 to 12 carbon atoms (preferably α-olefins having 4 to 10 carbon atoms, most preferably 1-octene), and the ethylene-based plastic body (D) has:

[0027] - The melt flow rate, as determined according to ISO 1133 at 190°C and 2.16 kg, is in the range of 0.2 to 2.5 g / 10 min, preferably in the range of 0.3 to 2.0 g / 10 min; and

[0028] - The density, as determined by ISO 1183, is 850 to 870 kg / m³. 3 Preferably, it is 855 to 865 kg / m 3 ;and

[0029] The melt flow rate (MFR2) of the composition, as determined according to ISO 1133 at 230°C and 2.16 kg, is in the range of 5.0 to less than 20.0 g / 10 min, preferably 7.5 to 19.0 g / 10 min, and more preferably 9.0 to 17.5 g / 10 min.

[0030] Furthermore, the present invention relates to an article comprising the composition described above or below, wherein the content of the composition is 90 to 100 wt%.

[0031] Furthermore, the present invention relates to the use of the compositions described above or below in injection-molded articles (preferably automotive articles, more preferably automotive interior articles).

[0032] definition

[0033] 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 asserting the invention, the following terms will be used according to the definitions set forth below. Unless otherwise expressly stated, the terms “an,” “a,” etc., are used to mean one or more.

[0034] Blended plastics are defined as containing trace 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 that originate directly from the production process without any intermediate uses.

[0035] By definition, "mixed plastics" can be equivalent to detectable amounts of polystyrene and / or polyamide-6 and / or limonene and / or fatty acids.

[0036] Therefore, blended plastics can originate from post-consumer waste and industrial waste, rather than from the original polymer. Post-consumer waste refers to items that have completed at least their first use cycle (or life cycle), meaning they have fulfilled their primary purpose. In contrast, industrial waste refers to production or processing waste that typically does not reach consumers.

[0037] The term "virgin" refers to newly produced materials and / or articles before their first use, i.e., materials and / or articles that have not yet been recycled.

[0038] As used in this article, the term "recycled material" refers to material that has been reprocessed from "recycled waste".

[0039] Polymer blends are mixtures of two or more polymer components. Generally, blends are prepared by mixing two or more polymer components. A suitable blending process known in the art is post-polymerization blending. Post-polymerization blending can be a dry blending of polymer components (e.g., polymer powders and / or composite polymer particles) or a melt blending of polymer components.

[0040] A blend of polypropylene and other plastics indicates that the blend primarily contains polypropylene; however, small amounts of other plastics are also present. Recycled blends (especially post-consumer recycled blends) are almost always blends of other plastics, reflecting the limitations of sorting efficiency in existing recycling processes.

[0041] Polypropylene is a polymer composed of propylene-derived units with a content of more than 50 mol%.

[0042] Polyethylene is a polymer composed of units derived from ethylene with a content of more than 50 mol%.

[0043] Propylene homopolymer is a polymer that is essentially composed of propylene monomer units. Due to impurities, especially those present during commercial polymerization, propylene homopolymer may contain up to 0.1 mol% of comonomer units, preferably up to 0.05 mol% of comonomer units, and most preferably up to 0.01 mol% of comonomer units.

[0044] The term "elastomer" refers to a natural or synthetic polymer that possesses elastic properties. The term "plastic" refers to a natural or synthetic polymer that combines the properties of an elastomer and a plastic, such as a polymer exhibiting rubber-like properties and the processability of a plastic. Ethylene-based plastics are plastics composed of units derived from ethylene with a content greater than 50 mol%.

[0045] The presence of multiphase properties can be readily determined by the number of glass transition points, for example by dynamic mechanical analysis (DMA) and / or high-resolution microscopy (such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), or atomic force microscopy (AFM)).

[0046] The term "XCS" refers to the cold soluble fraction of xylene determined at 25°C according to ISO 16152 (XCS wt%). The term "XCI" refers to the cold insoluble fraction of xylene determined at 25°C according to ISO 16152 (XCI wt%).

[0047] Reactor blends are blends produced in two or more reactors in series or in a reactor having two or more reaction chambers. Alternatively, reactor blends can be produced by blending in solution. Reactor blends differ from compounds produced by melt extrusion.

[0048] Unless otherwise stated, "%" refers to weight % (wt%). Attached Figure Description

[0049] Figure 1 The performance balance of surface appearance, rigidity, and impact properties of embodiments IE1-IE5 and CE1-CE6 is shown in the form of tiger stripes (MSE surface quality, 1.5s) as a function of rigidity-impact coefficient (tensile modulus * Charpy NIS (+23°C)). Detailed Implementation

[0050] Composition

[0051] In a first aspect, the present invention relates to a composition suitable for automotive applications, which can be obtained by blending at least components (A), (B), (C), (D) and (E):

[0052] (A) 5.0 to 40.0 wt%, preferably 7.0 to 37.5 wt%, more preferably 8.0 to 35.0 wt% of a first multiphase propylene copolymer;

[0053] (B) A second multiphase propylene copolymer of more than 20.0 to 35.0 wt%, preferably 21.0 to 32.5 wt%, more preferably 22.0 to 31.0 wt%;

[0054] (C) 10.0 wt% to 50.0 wt%, preferably 12.0 to 47.5 wt%, more preferably 14.0 to 46.0 wt% of mixed plastic polypropylene blends;

[0055] (D) 2.5 wt% to 15.0 wt%, preferably 3.5 to 12.5 wt%, more preferably 4.0 to 11.0 wt% of ethylene-based plastics; and

[0056] (E) 2.5 wt% to less than 12.5 wt%, preferably 3.5 to 12.0 wt%, more preferably 4.0 to 11.0 wt% of inorganic filler;

[0057] All percentages are based on the total amount of the composition, and

[0058] The first multiphase propylene copolymer (A) comprises a matrix phase and an elastomer phase dispersed therein, and has the following characteristics:

[0059] - Melt flow rate (MFR2) measured according to ISO 1133 at 230°C and 2.16 kg is in the range of 90 to 250 g / 10 min; and

[0060] - The intrinsic viscosity (iV(SF)) of the soluble fraction, as determined by CRYSTEX QC analysis according to DIN ISO 1628 / 1, is in the range of 2.00 to 4.00 dl / g;

[0061] The second multiphase propylene copolymer (B) comprises a matrix phase and an elastomer phase dispersed therein, and has the following characteristics:

[0062] - Melt flow rate (MFR2) measured according to ISO 1133 at 230°C and 2.16 kg is in the range of 3.0 to 30 g / 10 min; and

[0063] - The intrinsic viscosity (iV(SF)) of the soluble fraction analyzed by CRYSTEX QC according to DIN ISO 1628 / 1 is in the range of 4.10 to 10.00 dl / g;

[0064] The mixed plastic polypropylene blend (C) has the following characteristics:

[0065] - The crystalline fraction (CF) content, as determined by CRYSTEX QC analysis, is in the range of 85.0 to 96.0 wt%, preferably in the range of 86.5 to 95.5 wt%, and

[0066] - The soluble fraction (SF) content, as determined by CRYSTEX QC analysis, is in the range of 4.0 to 15.0 wt%, preferably in the range of 4.5 to 13.5 wt%, wherein...

[0067] -The crystalline fraction (CF) is quantified 13 The ethylene content (C2(CF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy is in the range of 1.0 to 10.0 wt%, preferably in the range of 1.5 to 9.5 wt%, and

[0068] - The intrinsic viscosity (iV(SF)) of the soluble fraction (SF) is in the range of 0.9 to 2.1 dl / g, preferably in the range of 1.0 to 2.0 dl / g, and more preferably in the range of 1.1 to 1.9 dl / g;

[0069] The ethylene-based plastic body (D) is a copolymer of ethylene and a comonomer unit selected from α-olefins having 3 to 12 carbon atoms (preferably α-olefins having 4 to 10 carbon atoms, most preferably 1-octene), and the ethylene-based plastic body (D) has:

[0070] - The melt flow rate, as determined according to ISO 1133 at 190°C and 2.16 kg, is in the range of 0.2 to 2.5 g / 10 min, preferably in the range of 0.3 to 2.0 g / 10 min; and

[0071] - The density, as determined by ISO 1183, is 850 to 870 kg / m³. 3 Preferably, it is 855 to 865 kg / m 3 ;and

[0072] The melt flow rate (MFR2) of the composition, as determined according to ISO 1133 at 230°C and 2.16 kg, is in the range of 5.0 to less than 20.0 g / 10 min, preferably 7.5 to 19.0 g / 10 min, and more preferably 9.0 to 17.5 g / 10 min.

[0073] The compositions according to the invention, suitable for automotive applications, are particularly well-suited for injection molding of articles for vehicle interiors.

[0074] The compositions according to the invention suitable for automotive applications have one or more of the following properties:

[0075] The melt flow rate (MFR2) of the composition (230°C, 2.16 kg, ISO 1133) is 5.0 to less than 20.0 g / 10 min, preferably 7.5 to 19.0 g / 10 min, and more preferably 9.0 to 17.5 g / 10 min.

[0076] The composition can be characterized by CRYSTEX QC analysis. In CRYSTEX QC analysis, crystalline fraction (CF) and soluble fraction (SF) are obtained, which can be quantified and analyzed based on the content of monomers and comonomers and intrinsic viscosity (iV).

[0077] The composition preferably exhibits one or all of the following properties in CRYSTEX QC analysis:

[0078] - The crystalline fraction (CF) content, as determined by CRYSTEX QC analysis, is in the range of 65.0 to 85.0 wt%, preferably in the range of 70.0 to 80.0 wt%, and

[0079] - The soluble fraction (SF) content, as determined by CRYSTEX QC analysis, is in the range of 15.0 to 35.0 wt%, preferably in the range of 20.0 to 30.0 wt%.

[0080] Typically, the crystalline fraction (CF) and soluble fraction (SF) content of a composition are only related to its polymeric components, i.e., excluding other insoluble components that do not participate in the dissolution and crystallization cycle in the following assays, such as inorganic fillers (E).

[0081] Therefore, the content of crystalline fraction (CF) and soluble fraction (SF) is based on the weight of the polymer component of the composition.

[0082] The crystalline fraction (CF) preferably has one or more, preferably all of the following properties:

[0083] - Through quantitative methods 13 The ethylene content (C2(CF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy is 1.0 to 10.0 wt%, preferably 2.5 to 7.5 wt%; and / or

[0084] - The intrinsic viscosity (iV(CF)) in naphthalene, measured at 135°C according to DIN ISO 1628 / 1, is less than 2.0 dl / g, preferably 1.2 to 1.9 dl / g.

[0085] The soluble fraction (SF) preferably has one or more of the following properties, and preferably all of the following properties:

[0086] - Through quantitative methods 13 The ethylene content (C2(SF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy is in the range of 30 to 50 wt%, preferably in the range of 35 to 48 wt%; and / or

[0087] - The intrinsic viscosity (iV(SF)) in naphthalene, measured at 135°C according to DIN ISO 1628 / 1, is greater than 2.1 dl / g, preferably 2.2 to 3.7 dl / g.

[0088] The intrinsic viscosity ratio (iV(SF) / iV(CF)) of the soluble fraction and the crystalline fraction of the composition is preferably greater than 1.0, more preferably 1.40 to 2.20, and even more preferably 1.55 to 2.00.

[0089] Furthermore, the ratio of ethylene content (C2(SF) / C2(CF)) of the soluble fraction and the crystalline fraction of the composition is preferably from 2.5 to 15.0, more preferably from 3.5 to 14.0, and even more preferably from 5.0 to 12.5.

[0090] The compositions according to the invention preferably exhibit an excellent balance of performance, showing an excellent balance of performance in terms of fluidity (as can be seen from the melt flow rate described above), impact performance, rigidity (e.g., in terms of tensile properties), and especially emission performance (e.g., in terms of LBS and HBS volatiles and atomization).

[0091] The tensile modulus of the composition is preferably from 1200 MPa to 2200 MPa, and more preferably from 1300 MPa to 2000 MPa.

[0092] Furthermore, the Charpy notched impact strength (CNIS at 23°C) of the composition is preferably 7.5 kJ / m. 2 Up to 55.0 kJ / m 2 More preferably, it is 8.5 to 50.0 kJ / m 2 .

[0093] Furthermore, the Charpy notched impact strength (CNIS at -20°C) of the composition is preferably 2.5 kJ / m. 2 Up to 10.0 kJ / m 2 More preferably 3.5 to 7.5 kJ / m 2 .

[0094] Furthermore, the stiffness-impact coefficient, tensile modulus*Charpy NIS (+23°C) of the composition is preferably 10,000 to 100,000 MPa*kJ / m. 2 More preferably, it is 1500 to 80000 MPa*kJ / m 2 More preferably, it is 15,000 to 70,000 MPa*kJ / m 2 .

[0095] Furthermore, the content of low-boiling-point organic matter (LBS) in the composition, as determined by thermal desorption analysis of organic emissions, is preferably in the range of 5 to 100 μg / g, more preferably in the range of 10 to 75 μg / g.

[0096] Furthermore, the composition contains high-boiling-point organic matter (HBS) content determined by thermal desorption analysis of organic emissions in the range of 100 to 500 μg / g, more preferably in the range of 200 to 450 μg / g.

[0097] Furthermore, the atomization amount of the composition, as determined by gravimetric method DI 75201:2011-11, method B, is preferably in the range of 0.05 to 1.00 mg, more preferably in the range of 0.15 to 0.75 mg.

[0098] The compositions of the present invention must contain components (A), (B), (C), (D) and (E) as described above or below, in the amounts described accordingly.

[0099] Components (A), (B), (C), (D) and (E) preferably comprise 85.0 to 100 wt%, more preferably 90.0 to 99.9 wt%.

[0100] The composition preferably further comprises a pigment masterbatch, wherein the content of the pigment masterbatch is 0.5 to 10.0 wt% based on the total weight of the composition, more preferably in the range of 2.0 to 10.0 wt%, and most preferably in the range of 4.0 to 10.0 wt%.

[0101] The composition preferably further comprises additives, wherein the amount of additives is at most 3.0 wt%, more preferably 0.1 to 3.0 wt%, and even more preferably 0.5 to 2.5 wt%, based on the total weight of the composition.

[0102] Typically, additives are selected from antioxidants, antislip agents, nucleating agents, anti-scratch agents, anti-scorching agents, metal passivators, UV stabilizers, deacidifiers, lubricants, antistatic agents, and combinations thereof. These additives are well-known in the polymer industry, and their uses are familiar to those skilled in the art. Any existing additive can be added as a single raw material or in the form of a mixture with the carrier polymer (i.e., in the form of a so-called masterbatch).

[0103] The compositions according to the invention are typically prepared by melt blending components (A), (B), (C), (D), and (E), optional pigment masterbatch, and optional additives. Melt blending equipment and conditions are within the conventional scope of the art.

[0104] Specifically, conventional compounding or blending equipment is preferred, such as a Banbury mixer, a twin-roll rubber mill, a Buss co-kneader, or a twin-screw extruder. More preferably, the mixing is carried out in a co-rotating twin-screw extruder.

[0105] Polymer materials recovered from the extruder (e.g., compositions according to the invention) are typically in granular form.

[0106] First heterophasic propylene copolymer (A)

[0107] The first multiphase propylene copolymer (A) comprises a matrix phase and an elastomer phase dispersed therein.

[0108] The melt flow rate MFR2 (230°C, 2.16 kg, ISO 1133) of the first multiphase propylene copolymer (A) is 90 to 250 g / 10 min, preferably 95 to 200 g / 10 min, and more preferably 97 to 175 g / 10 min.

[0109] The first multiphase propylene copolymer (A) can be characterized by CRYSTEX QC analysis. In CRYSTEX QC analysis, crystalline fraction (CF) and soluble fraction (SF) are obtained, which can be quantified and analyzed based on the content of monomers and comonomers and intrinsic viscosity (iV).

[0110] The first multiphase propylene copolymer (A) preferably exhibits one or all of the following properties in CRYSTEX QC analysis:

[0111] - The content of the crystal fraction (CF), as determined by CRYSTEX QC analysis, is in the range of 80.5 to 92.0 wt%, preferably 82.0 to 90.0 wt%, more preferably 83.0 to 86.0 wt%; and

[0112] - The soluble fraction (SF) content, as determined by CRYSTEX QC analysis, is in the range of 8.0 to 19.5 wt%, preferably in the range of 10.0 to 18.0 wt%, and more preferably in the range of 13.0 to 17.0 wt%.

[0113] The crystalline fraction (CF) preferably has one or more, preferably all of the following properties:

[0114] - Through quantitative methods 13 The ethylene content (C2(CF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy is 0.1 to 5.0 wt%, preferably 0.2 to 4.0 wt%, more preferably 0.5 to 3.0 wt%; and / or

[0115] - The intrinsic viscosity (iV(CF)) in naphthalene, measured at 135°C according to DIN ISO 1628 / 1, is less than 1.8 dl / g, preferably 0.8 to 1.6 dl / g, and more preferably 0.9 to 1.3 dl / g.

[0116] The soluble fraction (SF) preferably has one or more, preferably all of the following properties:

[0117] - Through quantitative methods 13 The ethylene content (C2(SF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy is in the range of 25.0 to 45.0 wt%, preferably 27.5 to 43.0 wt%, more preferably 30.0 to 42.0 wt%; and / or

[0118] - The intrinsic viscosity (iV(SF)) in naphthalene, measured at 135°C according to DIN ISO 1628 / 1, is 1.50 to 4.00 dl / g, preferably 1.60 to 3.00 dl / g, and more preferably 1.70 to 2.50 dl / g;

[0119] The first multiphase propylene copolymer (A) preferably contains 2.5 to 12.5 wt% (more preferably 4.0 to 10.0 wt%, and even more preferably 5.0 to 7.5 wt%) of ethylene-derived units.

[0120] The intrinsic viscosity ratio (IV(SF) / IV(CF)) of the soluble fraction and the crystalline fraction is preferably greater than 1.0, more preferably 1.3 to 2.5, and even more preferably 1.4 to 2.0.

[0121] The ratio of ethylene content in the soluble fraction to the crystalline fraction (C2(SF) / C2(CF)) is preferably in the range of 7.5 to 22.5, more preferably in the range of 10.0 to 20.0, and even more preferably in the range of 15.0 to 17.5.

[0122] The first multiphase propylene copolymer (A) also preferably has one or more, preferably all of, the following properties:

[0123] - The melting temperature Tm is 155 to 175°C, more preferably 157 to 172°C, and even more preferably 160 to 170°C; and / or

[0124] - The crystallization temperature Tc is 115 to 135°C, more preferably 117 to 132°C, and even more preferably 119 to 130°C.

[0125] All temperatures were determined by differential scanning calorimetry (DSC).

[0126] The first multiphase propylene copolymer (A) preferably exhibits a good balance of mechanical properties, impact properties, and thermal stability.

[0127] The tensile modulus of the first multiphase propylene copolymer (A) is preferably 1200 to 1600 MPa, more preferably 1250 to 1550 MPa, and even more preferably 1300 to 1500 MPa.

[0128] Furthermore, the Charpy notched impact strength (CNIS at 23°C) of the first multiphase propylene copolymer (A) is preferably from 1.0 to 7.5 kJ / m. 2 More preferably, it is 2.0 to 5.0 kJ / m 2 .

[0129] Preferably, the first multiphase propylene copolymer (A) consists only of propylene units and ethylene units.

[0130] Although not measured, the sum of the content of propylene-derived (C3) units in the soluble fraction (SF) and the content of ethylene-derived (C2) units in the soluble fraction (SF) is preferably 100 wt%.

[0131] The content of propylene (C3)-derived units in the soluble fraction (SF) is preferably 55.0 to 75.0 wt%, more preferably 57.0 to 72.5 wt%, and even more preferably 58.0 to 70.0 wt%.

[0132] Although not measured, the sum of the content of propylene-derived (C3) units in the crystalline fraction (CF) and the content of ethylene-derived (C2) units in the crystalline fraction (CF) is preferably 100 wt%.

[0133] The content of propylene (C3)-derived units in the crystalline fraction (CF) is preferably 95.0 to 99.9 wt%, more preferably 96.0 to 99.8 wt%, and even more preferably 97.0 to 99.5 wt%.

[0134] The total content of propylene (C3)-derived units in the first multiphase polypropylene copolymer (A) is preferably 87.5 to 97.5 wt%, more preferably 90.0 to 96.0 wt%, and even more preferably 92.5 to 95.0 wt%.

[0135] The first multiphase propylene copolymer (A) is preferably the original polymer.

[0136] The multiphase propylene copolymer suitable as the first multiphase propylene copolymer (A) is commercially available.

[0137] Before being mixed with other components used to prepare the composition according to the invention, the first multiphase propylene copolymer (A) may be ventilated (e.g., as described in EP3786190A1) to remove volatile components.

[0138] Second heterophasic propylene copolymer (B)

[0139] The second multiphase propylene copolymer (B) comprises a matrix phase and an elastomer phase dispersed therein.

[0140] The melt flow rate MFR2 (230°C, 2.16 kg, ISO 1133) of the second multiphase propylene copolymer (B) is 3.0 to 30 g / 10 min, preferably 4.0 to 20.0 g / 10 min, and more preferably 4.5 to 10.0 g / 10 min.

[0141] The second multiphase propylene copolymer (B) can be characterized by CRYSTEX QC analysis. In CRYSTEX QC analysis, crystalline fraction (CF) and soluble fraction (SF) are obtained, which can be quantified and analyzed based on the content of monomers and comonomers and intrinsic viscosity (iV).

[0142] The second multiphase propylene copolymer (B) preferably exhibits one or all of the following properties in CRYSTEX QC analysis:

[0143] - The content of the crystal fraction (CF), as determined by CRYSTEX QC analysis, is in the range of 65.0 to 85.0 wt%, preferably 70.0 to 82.5 wt%, more preferably 74.0 to 80.0 wt%; and

[0144] - The soluble fraction (SF) content, as determined by CRYSTEX QC analysis, is in the range of 15.0 to 35.0 wt%, preferably in the range of 17.5 to 30.0 wt%, and more preferably in the range of 20.0 to 26.0 wt%.

[0145] The crystalline fraction (CF) preferably has one or more, preferably all of the following properties:

[0146] - Through quantitative methods 13 The ethylene content (C2(CF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy is 0.1 to 5.0 wt%, preferably 0.2 to 4.0 wt%, more preferably 0.5 to 3.0 wt%; and / or

[0147] - The intrinsic viscosity (iV(CF)) in naphthalene, measured at 135°C according to DIN ISO 1628 / 1, is less than 2.5 dl / g, preferably 1.2 to 2.4 dl / g, and more preferably 1.6 to 2.2 dl / g.

[0148] The soluble fraction (SF) preferably has one or more, preferably all of the following properties:

[0149] - Through quantitative methods 13 The ethylene content (C2(SF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy is in the range of 18.0 to 30.0 wt%, preferably 19.0 to 28.0 wt%, more preferably 20.0 to 26.0 wt%; and / or

[0150] - The intrinsic viscosity (IV(SF)) in naphthalene, measured at 135°C according to DIN ISO 1628 / 1, is 4.10 to 10.00 dl / g, preferably 4.50 to 8.00 dl / g, and more preferably 5.00 to 6.00 dl / g.

[0151] The second multiphase propylene copolymer (B) preferably contains 2.5 to 12.5 wt% (more preferably 4.0 to 10.0 wt%, and even more preferably 5.0 to 7.5 wt%) of ethylene-derived units.

[0152] The intrinsic viscosity ratio (IV(SF) / IV(CF)) of the soluble fraction and the crystalline fraction is preferably greater than 2.0, more preferably 2.2 to 3.5, and even more preferably 2.5 to 3.2.

[0153] The ratio of ethylene content in the soluble fraction to the crystalline fraction (C2(SF) / C2(CF)) is preferably in the range of 5.0 to 17.5, more preferably in the range of 7.5 to 15.0, and even more preferably in the range of 10.0 to 12.5.

[0154] The second multiphase propylene copolymer (B) also preferably has one or more, preferably all of, the following properties:

[0155] - The melting temperature Tm is 155 to 175°C, more preferably 157 to 172°C, and even more preferably 160 to 170°C; and / or

[0156] - The crystallization temperature Tc is 110 to 130°C, more preferably 112 to 127°C, and even more preferably 114 to 124°C.

[0157] All temperatures were determined by differential scanning calorimetry (DSC).

[0158] The second multiphase propylene copolymer (B) preferably exhibits a good balance of mechanical properties, impact resistance, and thermal stability.

[0159] The tensile modulus of the second multiphase propylene copolymer (B) is preferably 850 to 1300 MPa, more preferably 900 to 1200 MPa, and even more preferably 1000 to 1150 MPa.

[0160] Furthermore, the Charpy notched impact strength (CNIS at 23°C) of the second multiphase propylene copolymer (B) is preferably 30 to 75 kJ / m. 2 More preferably 40 to 60 kJ / m 2 .

[0161] Preferably, the second multiphase propylene copolymer (B) consists only of propylene units and ethylene units.

[0162] Although not measured, the sum of the content of propylene-derived (C3) units in the soluble fraction (SF) and the content of ethylene-derived (C2) units in the soluble fraction (SF) is preferably 100 wt%.

[0163] The content of propylene (C3)-derived units in the soluble fraction (SF) is preferably 70.0 to 82.0 wt%, more preferably 72.0 to 81.0 wt%, and even more preferably 74.0 to 80.0 wt%.

[0164] Although not measured, the sum of the content of propylene-derived (C3) units in the crystalline fraction (CF) and the content of ethylene-derived (C2) units in the crystalline fraction (CF) is preferably 100 wt%.

[0165] The content of propylene (C3)-derived units in the crystalline fraction (CF) is preferably 95.0 to 99.9 wt%, more preferably 96.0 to 99.8 wt%, and even more preferably 97.0 to 99.5 wt%.

[0166] The total content of propylene (C3)-derived units in the second multiphase propylene copolymer (B) is preferably 87.5 to 97.5 wt%, more preferably 90.0 to 96.0 wt%, and even more preferably 92.5 to 95.0 wt%.

[0167] The second multiphase propylene copolymer (B) is preferably the original polymer.

[0168] The multiphase propylene copolymers suitable as the second multiphase propylene copolymer (B) are commercially available.

[0169] Before being mixed with other components used to prepare the composition according to the invention, the second multiphase propylene copolymer (B) may be ventilated (e.g., as described in EP3786190A1) to remove volatile components.

[0170] Mixed plastic polypropylene blend (C)

[0171] Blended plastic polypropylene blends (C) are recycled materials rich in polypropylene, meaning they contain significantly more polypropylene than polyethylene. High-polypropylene recycled waste streams can be obtained, for example, from the automotive industry, particularly because some automotive parts, such as bumpers, are sources of relatively pure polypropylene material in recycled streams.

[0172] Preferably, the polypropylene-rich recycled material is obtained from recycled waste using plastic recycling processes known in the art. Such recycled materials are commercially available from, for example, Corepla (Italian Union for the Collection, Recycling and Regeneration of Plastic Packaging Waste), Resource Plastics Corp. (Brampton, Ontario), Kruschitz GmbH, Plastics and Recycling (Austria), Vogt Plastik GmbH (Germany), Mtm ​​Plastics GmbH (Germany), etc. Non-exhaustive examples of polypropylene-rich recycled materials include: (Mtm Plastics GmbH) Recycled polypropylene granules (Axion Ltd) and polypropylene copolymers (BSP Compounds).

[0173] During the recycling process, any reasonable measures are typically taken to reduce / remove any components other than polyethylene and polypropylene, provided that such measures are recommended for the final application or use; however, other components are usually present in small amounts.

[0174] Other such components include polystyrene (PS), polyamide (PA), and polyethylene terephthalate (PET), which are present in the lowest possible amounts, preferably below the detection limit.

[0175] The melt flow rate (MFR2) of the mixed plastic polypropylene blend (C) (determined according to ISO 1133 at 230°C and 2.16 kg) is preferably in the range of 10.0 to 40.0 g / 10 min, more preferably in the range of 12.0 to 35.0 g / 10 min, and most preferably in the range of 13.0 to 30.0 g / 10 min.

[0176] Polypropylene blends (C) can be characterized using CRYSTEX QC analysis. CRYSTEX QC analysis yields crystalline fractions (CF) and soluble fractions (SF), which can be quantified and analyzed based on monomer and comonomer content and intrinsic viscosity (iV).

[0177] The blended plastic polypropylene blend (C) preferably exhibits one or all of the following properties in CRYSTEX QC analysis:

[0178] - The content of the crystal fraction (CF), as determined by CRYSTEX QC analysis, is in the range of 85.0 to 96.0 wt%, preferably 86.5 to 95.5 wt%, more preferably 89.0 to 95.0 wt%; and

[0179] - The soluble fraction (SF) content, as determined by CRYSTEX QC analysis, is in the range of 4.0 to 15.0 wt%, preferably 4.5 to 13.5 wt%, and more preferably 5.0 to 11.0 wt%.

[0180] The crystalline fraction (CF) preferably has one or more, preferably all of the following properties:

[0181] - Through quantitative methods 13 The ethylene content (C2(CF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy is 1.0 to 10.0 wt%, preferably in the range of 1.5 to 9.5 wt%, more preferably in the range of 2.0 to 7.5 wt%; and / or

[0182] - The intrinsic viscosity (iV(CF)) in naphthalene, measured at 135°C according to DIN ISO 1628 / 1, is less than 2.5 dl / g, preferably 1.1 to 2.3 dl / g, and more preferably 1.4 to 2.0 dl / g.

[0183] The soluble fraction (SF) preferably has one or more, preferably all of the following properties:

[0184] - Through quantitative methods 13 The ethylene content (C2(SF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy is in the range of 20.0 to 55.0 wt%, preferably 22.0 to 50.0 wt%, more preferably 24.0 to 48.0 wt%; and / or

[0185] - The intrinsic viscosity (iV(SF)) in naphthalene, measured at 135°C according to DIN ISO 1628 / 1, is in the range of 0.9 to 2.1 dl / g, preferably in the range of 1.0 to 2.0 dl / g, and more preferably in the range of 1.1 to 1.9 dl / g.

[0186] The mixed plastic polypropylene blend (C) preferably contains 2.5 to 10.0 wt% (more preferably 3.0 to 9.0 wt%, and even more preferably 3.5 to 8.0 wt%) of ethylene-derived units.

[0187] The inorganic residue content of the mixed plastic polypropylene blend (C), as determined by calcination analysis according to DIN ISO 1172:1996, is preferably 0.05 to 3.0 wt%, more preferably in the range of 0.5 to 2.5 wt%, and most preferably in the range of 1.0 to 2.5 wt%.

[0188] The mixed plastic polypropylene blend (C) is preferably derived from post-industrial waste or post-consumer waste, with post-consumer waste being the most preferred source.

[0189] The preferred limonene content of the polypropylene blend (C) determined by solid-phase microextraction (HS-SPME-GC-MS) is between 1 and 250 mg / m³. 3 Within the range.

[0190] The presence of limonene indicates that the mixed plastic polypropylene blend (C) originated from post-consumer waste.

[0191] Further evidence indicating the recyclable nature of the mixed plastic polypropylene blend (C) includes the presence of other polymers (such as polystyrene and polyamide-6) and fatty acids.

[0192] Therefore, more preferably, the mixed plastic polypropylene blend (C) contains one or more of polystyrene, polyamide-6 and fatty acids, and more preferably contains polystyrene, polyamide-6 and fatty acids simultaneously.

[0193] The preferred CIELAB color space (L*a*b) for the mixed plastic polypropylene blend (C) is:

[0194] i) L* is 50.0 to 97.0, more preferably 80.0 to 97.0;

[0195] ii) a* is between -5.0 and 0.0;

[0196] iii) b* is 0.0 to 22.0 (but excluding 22.0).

[0197] For the production of light-colored (e.g., light gray) polypropylene compositions, an L* value in the range of 80.0 to 97.0 is particularly preferred.

[0198] Before blending with other components used to prepare the compositions according to the invention, the blended plastic polypropylene blend (C) may be ventilated (e.g., as described in EP3786190A1) to remove volatile components.

[0199] Ethylene-based plastomer (D)

[0200] The ethylene-based plastic body (D) is preferably a copolymer of ethylene and a comonomer unit, wherein the comonomer unit is selected from α-olefins having 3 to 12 carbon atoms, preferably α-olefins having 4 to 10 carbon atoms, more preferably 1-butene or 1-octene, and most preferably 1-octene.

[0201] Vinyl plasmids are often added to further improve the impact properties of the composition.

[0202] The ethylene-based plastic body (D) preferably has one or more, preferably all of the following properties:

[0203] - The melt flow rate MFR2 (190°C, 2.16 kg, ISO 1133) is 0.2 to 2.5 g / 10 min, preferably 0.3 to 2.0 g / 10 min; and

[0204] -Density is 850 to 870 kg / m³ 3 Preferably, it is 855 to 865 kg / m 3 .

[0205] Such vinyl plastics are commercially available under trade names Engage, Exact, Queo, Tafmer, or other trade names.

[0206] Inorganic filler (E)

[0207] Preferably, the inorganic filler (E) is selected from talc, calcium carbonate, barium sulfate, mica and mixtures thereof.

[0208] Most preferably, the inorganic filler (E) is talc.

[0209] The median particle size d of the inorganic filler (preferably talc) (E) before blending 50 Preferably, the micrometer is 0.3 to 30.0 micrometers, more preferably 0.5 to 15.0 micrometers.

[0210] Furthermore, the top-cut particle size d of the inorganic filler (preferably talc) (E) before blending 95 Preferably, the micrometer is 1.0 to 50.0 micrometers, and more preferably, it is 1.5 to 35.0 micrometers.

[0211] Particle size is typically measured using a Sedigraph and is given in the technical datasheet for commercial grades.

[0212] Such inorganic fillers are commercially available.

[0213] Pigment masterbatch

[0214] The composition of the present invention is preferably a coloring composition.

[0215] Therefore, based on the total weight of the composition, the content of the pigment masterbatch is in the range of 0.5 to 10.0 wt%, more preferably in the range of 2.0 to 10.0 wt%, and most preferably in the range of 4.0 to 10.0 wt%.

[0216] Based on the total weight of the pigment masterbatch, the total pigment content of the pigment masterbatch is preferably in the range of 40.0 to 80.0 wt%. The pigment masterbatch may contain one pigment or multiple pigments. When the pigment masterbatch contains more than one pigment, it may be provided in the form of multiple pigment masterbatches, each containing one pigment, wherein the sum of the contents of the individual pigment masterbatches equals the total weight of the pigment masterbatch according to the invention.

[0217] The choice of pigment depends on the desired color of the composition. Apart from these considerations, there are no limitations on the selection of suitable pigments. Those skilled in the art are able to select suitable pigments to achieve a specific final color of the composition.

[0218] Additives

[0219] Based on the total weight of the composition, the amount of other additives added is preferably in the range of 0.1 to 3.0 wt%, more preferably 0.1 to 3.0 wt%, and even more preferably 0.5 to 2.5 wt%. Those skilled in the art can select suitable additives known in the art.

[0220] The additives are preferably selected from antioxidants, UV stabilizers, anti-scratch agents, release agents, deacidifiers, lubricants, antistatic agents, and mixtures thereof.

[0221] It should be understood that the amount of additive (relative to the total weight of the composition) includes any carrier polymer used to introduce the additive into the composition, i.e., the masterbatch carrier polymer. An example of such a carrier polymer is a polypropylene homopolymer in powder form.

[0222] Article

[0223] In another aspect, the present invention relates to an article comprising, in an amount of 90 to 100 wt%, preferably 95 to 100 wt%, more preferably 98 to 100 wt%, and even more preferably 99 to 100 wt%, of the composition as described above or below.

[0224] The article is preferably a molded article, and more preferably a molded automotive article.

[0225] The article is preferably used in vehicle interiors, such as dashboards, step assist devices, interior trim pieces, ash trays, interior body panels, and gearshift levers.

[0226] Articles prepared from the compositions of the present invention, in addition to the excellent balance of properties of the above-mentioned compositions, also exhibit good surface quality, for example, in terms of tiger stripes as measured by MSE surface quality.

[0227] Preferably, the surface quality of the article at 1.5s is less than 25, more preferably less than 23.

[0228] Furthermore, the surface quality of the product at 3s is preferably less than 15, more preferably less than 13.

[0229] Furthermore, the surface quality of the article at 6s is preferably less than 15, and more preferably less than 13.

[0230] Furthermore, the surface quality of the article at 1.5s preferably satisfies the following dimensionless inequality (I):

[0231] MSE, 1.5s < 0.00015·TM·Charpy NIS, 23℃ +20

[0232] Where MSE, 1.5s represents the surface quality at 1.5s.

[0233] TM stands for tensile modulus, determined according to ISO 527-2, and its unit is [MPa]. -1 ],as well as

[0234] Charpy NIS, 23℃ represents the Charpy notched impact strength, determined according to ISO 179 1eA at +23℃, with units of [m]. 2 / kJ].

[0235] Furthermore, the surface quality of the product at 3s preferably satisfies the following dimensionless inequality (II):

[0236] MSE, 3s < -0.5·filler + 15

[0237] in,

[0238] MSE, 3s represents the surface quality at 3s, and

[0239] Filler = Inorganic filler (E) content, in units of [1 / wt%].

[0240] Furthermore, the scratch resistance of the product at 10N is preferably in the range of 0.00 to 1.00, more preferably in the range of 0.10 to 0.90.

[0241] Use

[0242] In another aspect, the present invention relates to the use of the compositions described above or below for injection-molded articles, preferably automotive articles, more preferably automotive interior articles.

[0243] Experimental Section

[0244] The following examples illustrate certain aspects and implementations 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.

[0245] Test methods

[0246] a)CRYSTEX

[0247] Determination of crystalline and soluble fractions and their properties (IV and ethylene content)

[0248] The crystalline fraction (CF) and soluble fraction (SF), as well as the comonomer content and intrinsic viscosity of each fraction, in polypropylene (PP) compositions were analyzed using a CRYSTEX instrument, Polymer Char (Valencia, Spain). Detailed information on this technique and method can be found in the literature (Ljiljana Jeremic, Andreas Albrecht, Martina Sandholzer and Markus Gahleitner (2020), Rapid characterization of high-impact ethylene–propylene copolymer composition by crystallization extraction separation: comparability to standard separation methods, International Journal of Polymer Analysis and Characterization, 25:8, 581-596).

[0249] The crystalline and non-crystalline fractions were separated by a temperature cycle of dissolution at 160 °C, crystallization at 40 °C, and redissolution at 160 °C in 1,2,4-trichlorobenzene. Quantification of SF and CF, as well as 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.

[0250] The IR4 detector is a multi-wavelength detector that measures two different bands (CH3 stretching vibrations, centered at approximately 2960 cm⁻¹). -1 ) and CH stretching vibration (2700-3000cm) -1The IR absorbance at a certain point () is used to determine the concentration and ethylene content in ethylene-propylene copolymers. An IR4 detector is used with a series of eight EP copolymers (known ethylene content ranging from 2 wt% to 69 wt%). 13 (Measured by C-NMR), and calibrated at various concentrations ranging from 2 mg / ml to 13 mg / ml. To simultaneously meet the characteristics, concentrations, and ethylene contents of various polymer concentrations expected during Crystex analysis, the following calibration equation was used:

[0251] Concentration = a + b * absorbance (CH) + c * (absorbance (CH)) 2 +d*absorbance(CH3)+e*(absorbance(CH3)) 2 +f*absorbance(CH)*absorbance(CH3) (Equation 1)

[0252] CH3 / 1000C = a + b * absorbance (CH) + c * absorbance (CH3) + d * (absorbance (CH3) / absorbance (CH)) + e * (absorbance (CH3) / absorbance (CH)) 2 (Equation 2)

[0253] The constants a to e in Equation 1 and the constants a to f in Equation 2 were determined using least squares regression analysis.

[0254] Use the following relationship to convert CH3 / 1000C to ethylene content (in wt%):

[0255] wt% (ethylene in EP copolymer) = 100 - CH3 / 1000TC * 0.3 (Equation 3)

[0256] The amounts of soluble fraction (SF) and crystalline fraction (CF) were correlated, respectively, with the amounts of "cold xylene solubles" (XCS) and "cold xylene insolubles" (XCI) determined according to the ISO 16152 standard gravimetric method via XS calibration. XS calibration was performed by testing various EP copolymers with XS contents ranging from 2 to 31 wt%. The determined XS calibration was linear.

[0257] wt%XS = 1.01 * wt%SF (Equation 4)

[0258] 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 according to ISO 1628-3 in naphthalene by a standard method. Calibration was performed using various EP / PP copolymers with iV = 2-4 dL / g. The determined calibration curves were linear.

[0259] iV(dL / g)=a*Vsp / c (Equation 5)

[0260] The sample to be analyzed is weighed at a concentration of 10 mg / ml to 20 mg / ml. To avoid injecting gels and / or polymers (e.g., PET and PA) that may be insoluble in TCB at 160°C, the weighed sample is placed in a stainless steel mesh (MW 0.077 / D 0.05 mm).

[0261] After adding a 1,2,4-TCB solution containing 250 mg / L of 2,6-tert-butyl-4-methylphenol (BHT) as an antioxidant to the sample vial using an automated dispensing system, the sample is stirred at a constant speed of 400 rpm at 160 °C until completely dissolved, typically for 60 minutes. To prevent sample degradation, the polymer solution is protected under a nitrogen atmosphere during dissolution.

[0262] A specified volume of sample solution is injected into a chromatographic column packed with an inert support, where crystallization of the sample and separation of the soluble and crystalline fractions are performed. 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 crystalline fraction (at high temperature) of the crystallization cycle are measured (wt% SF, wt% C2, iV).

[0263] b) Xylene cold soluble fraction (XCS, wt%)

[0264] According to ISO 16152; First Edition; 2005-07-01, the xylene cold soluble fraction (XCS) is determined at 25°C. The remaining insoluble fraction is the xylene cold insoluble fraction (XCI).

[0265] c) Intrinsic viscosity

[0266] Intrinsic viscosity was determined according to DIN ISO 1628 / 1, October 1999 edition (in naphthalene, at 135°C).

[0267] d) Charpy notch impact strength

[0268] According to ISO 179-1eA, at +23°C and -20°C, use 80×10×4mm steel prepared according to EN ISO 1873-2. 3 The injection-molded specimens were tested. The measurements were performed after the specimens had been conditioned at 23°C for 96 hours.

[0269] e) Tensile modulus

[0270] Measurements were performed according to ISO 527-2 (crosshead speed = 1 mm / min; test speed 50 mm / min, at 23°C) using injection-molded specimen 1B (dog bone shape, 4 mm thickness) prepared according to EN ISO 1873-2. Measurements were taken after the specimens had been conditioned at 23°C for 96 hours.

[0271] f) Comonomer content

[0272] Poly(propylene-co-ethylene)-ethylene content-IR spectroscopy

[0273] The ethylene content of poly(ethylene-co-propylene) copolymers was quantified using quantitative infrared (IR) spectroscopy, calibrated to a primary method. 13 The calibration was performed using a set of internal, non-commercial calibration standards for C10 solution-state nuclear magnetic resonance (NMR) spectroscopy determination of known ethylene content. The calibration procedure was conducted in a standard manner well-documented in the literature. The calibration set consisted of 38 calibration standards with ethylene content ranging from 0.2 to 75.0 wt%, obtained under various conditions at pilot-scale or full-scale production. The calibration set was selected to reflect typical variations in copolymers encountered in the final quantitative IR spectroscopy.

[0274] Quantitative IR spectra were recorded in solid state using a Bruker Vertex 70 FTIR spectrometer. Spectra were recorded on 300 μm thick 25 × 25 mm square films prepared by compression molding at 180–210 °C and 4–6 MPa. For samples with very high ethylene content (>50 mol%), 100 μm thick films were used. Standard transmission FTIR spectroscopy was employed, using a 5000–500 cm⁻¹ wavelength range. -1 Spectral range, 6mm aperture, 2cm -1 The spectral resolution, 16 background scans, 16 spectral scans, interferogram zero-fill factor of 64, and Blackmann-Harris three-term window function were used. (CH2) ＞2 The structural unit is at 730cm -1 and 720cm -1 The total area of ​​CH2 rocking deformation at point (A) Q Quantitative analysis was performed (integral method G, integration limit 762 cm⁻¹). -1 and 694cm -1 The quantitative bands were normalized to correspond to the CH structural units at 4323 cm⁻¹. -1 The area of ​​the CH band at point (A) R (Integration method G, integration limit 4650cm) -1 and 4007cm -1 Then, using a secondary calibration curve, the normalized absorbance (A) is calculated.Q / A R The ethylene content, expressed as a weight percentage, is predicted. Calibration curves were previously constructed using ordinary least squares (OLS) regression of normalized absorbance values ​​measured on the calibration set and the content of the major comonomer.

[0275] Poly(propylene-co-ethylene)-ethylene content- 13 C NMR spectroscopy

[0276] Using a Bruker Avance III 400 NMR spectrometer, the NMR spectrometer was used to perform NMR measurements at 400.15 MHz and 100.62 MHz, respectively. 1 H and 13 C performs the operation and records the quantitative data in the solution state. 13 C{ 1 ¹H NMR spectroscopy. Nitrogen gas was used in all pneumatic systems at 125°C. 13 All spectra were recorded using a C-optimized 10mm extended temperature probe. Approximately 200 mg of 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).

[0277] To ensure a homogeneous solution, the NMR tube was further heated in a rotary oven for at least 1 hour after initial sample preparation in the heating block. The tube was then rotated at 10 Hz after the magnet was inserted. This setup was chosen primarily for the quantification requirements of high resolution and accurate ethylene content measurement. Standard single-pulse excitation was used without NOE, employing an optimized apex angle, a 1-second recirculation delay, and a dual-level 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) transients were acquired for each spectrum. For quantification... 13 C{ 1The H NMR spectra were processed, integrated, and the relevant quantitative properties were determined by the integration. The chemical shifts of the solvent were used, with all chemical shifts indirectly referenced to the central methylene group of the ethylene block (EEE) at 30.00 ppm. This method allows for comparable references even in the absence of this structural unit. Characteristic signals corresponding to ethylene binding were observed (Cheng, HN, Macromolecules 17 (1984), 1950), and the comonomer fraction was calculated as the fraction of ethylene in the polymer relative to all monomers in the polymer: fE = (E / (P+E)). Using the method of Wang et al., by... 13 C{ 1 Integrating multiple signals over the entire spectral region of the H spectrum to quantify the comonomer fraction (Wang, WJ., Zhu, S., Macromolecules 33 (2000), 1157). This method was chosen because of its robustness and ability to analyze the presence of defects in the region when needed. The integration region was slightly adjusted to increase applicability across the entire range of comonomer contents encountered. For systems with very low ethylene content where only isolated ethylene was observed in the PPEPP sequence, the method of Wang et al. was adjusted to reduce the influence of integrating sites that no longer exist. This method reduces the overestimation of ethylene content in such systems and is achieved by reducing the number of sites used to determine the absolute ethylene content to E = 0.5(Sββ + Sβγ + Sβδ + 0.5(Sαβ + Sαγ)). Using this set of sites, and using the same notation used in Wang et al.'s article, the corresponding integration equation becomes E = 0.5(I H +I G +0.5(I C +I D (Wang, WJ., Zhu, S., Macromolecules 33(2000), 1157). The equation for absolute propylene content remains unchanged. The amount of comonomer bound as a molar percentage is calculated from the mole fraction: E[mol%] = 100 * fE. The amount of comonomer bound as a weight percentage is calculated from the mole fraction: E[wt%] = 100 * (fE * 28.06) / ((fE * 28.06) + ((1 - fE) * 42.08)).

[0278] g) Comonomer content

[0279] Using the film thickness method, based on the strength I(q) of the metering band and the thickness T of the pressed film, the content is determined using the following relationship: [I(q) / T]m + c = C, where m and c are coefficients determined by a calibration curve, which uses... 13 The content of comonomers was constructed by obtaining C-NMR spectroscopy.

[0280] Based on 13 Fourier transform infrared spectroscopy (FTIR) calibrated by C-NMR was performed using a Nicolet Magna 550IR spectrometer and Nicolet Omnic FTIR software to measure the comonomer content in a known manner. A film with a thickness of approximately 250 μm was molded from the sample. A similar film was prepared from a calibration sample with a known comonomer content. Comonomer content was measured from wavenumbers ranging from 1430 to 1100 cm⁻¹. -1 The spectrum is determined. Absorbance is measured as the peak height by selecting a so-called short baseline, a long baseline, or both. The short baseline is set at approximately 1410–1320 cm⁻¹. -1 Draw the baseline through the minimum point within the range, and draw the long baseline at approximately 1410-1220cm. -1 Between these ranges, specific calibration is required for each baseline type. Furthermore, the comonomer content of unknown samples falls within the range of the comonomer content of calibrated samples.

[0281] h)MFR

[0282] Melt flow rate (MFR2) is measured with a load of 2.16 kg at 230 °C (polypropylene-based materials) or 190 °C (polyethylene-based materials). Melt flow rate is the amount of polymer extruded in grams over 10 minutes using a test apparatus standardized according to ISO 1133 at a temperature of 230 °C (or 190 °C) under a load of 2.16 kg.

[0283] i) Density

[0284] Density was measured according to ISO 1183-187. Samples were prepared by compression molding according to ISO 1872-2:2007.

[0285] j) DSC analysis, melting temperature (T) m ) and heat of fusion (H f ), crystallization temperature (T) c ) and heat of crystallization (H c )

[0286] Differential scanning calorimetry (DSC) was performed using a TA Instrument Q2000 on samples ranging from 5 to 7 mg. The DSC was operated according to ISO 11357 / Part 3 / Method C2 in a heating / cooling / heating cycle, with a scan rate of 10 °C / min and a temperature range of -30 to +225 °C. Crystallization temperature (T...) c ) and crystallization enthalpy (H c The melting temperature (Tm) and enthalpy of fusion (H) are determined from the cooling step. m This is determined from the second heating step.

[0287] k) Scratch resistance

[0288] To determine scratch visibility, a 420P CrossHatch Cutter manufactured by Erichsen was used. For the test, 70×70×4mm plates were cut from a molded granule plate with dimensions of 140×200×4mm (granule parameters: average particle size = 1mm, particle depth = 0.12mm, taper = 6°). The time interval between sample injection and scratch testing was 7 days. For the test, the sample must be clamped in the suitable equipment described above. Using a cylindrical metal pen with a spherical tip (radius = 0.5mm ± 0.01), scratching was applied under a force of 10N. A cutting speed of 1000mm / min was used. At least 20 parallel scratches were formed under a load of 10N, spaced 2mm apart. The scratches were repeatedly applied perpendicularly to each other to obtain the scratched screen. The scratching direction should be unidirectional.

[0289] Scratch visibility is expressed as the brightness difference ΔL between the unscratched and scratched areas. The ΔL value is measured using a spectrophotometer conforming to DIN 5033. Detailed test instructions for the test method (Erichsen cross-cutting method) can be found in the article "Evaluation of scratch resistance in multiphase PP blends" by Thomas Koch and Doris Machl, published in Polymer Testing, 26 (2007), pp. 927-936.

[0290] l) Tiger Stripes (MSE)

[0291] The tendency to exhibit flow marks is examined using the method described below. This method is described in detail in WO2010 / 149529A1, the entire contents of which are incorporated herein by reference. Optical measurement systems, such as those described by Sybille Frank et al. in PPS25Intern.Conf.Polym.Proc.Soc 2009 or Proceedings of the SPIE, Vol. 6831, pp. 68130T-68130T-8, 20 pages (2008), are used to characterize surface quality. This method consists of two aspects:

[0292] 1. Image recording:

[0293] The basic principle of the measurement system is to illuminate the board material with a specified light source (LED) in a closed environment and record the image with a CCD camera system.

[0294] 2. Image Analysis:

[0295] The sample is illuminated from one side by floodlight, and a portion of the light reflected upwards is deflected by two mirrors to a CCD sensor. The resulting grayscale image is analyzed row by row. Based on the recorded grayscale value deviations, the mean square error (MSE) is calculated, allowing for the quantification of surface quality; a larger MSE value indicates more pronounced surface defects.

[0296] Generally speaking, for the same material, the tendency for flow marks increases as the injection speed increases.

[0297] For this evaluation, a 440×148×2.8mm plaque with VW K50 grains and a 1.4mm filmagate was used, and it was prepared with different fill times of 1.5 seconds, 3 seconds and 6 seconds, respectively.

[0298] Other conditions:

[0299] Melting temperature: 240℃

[0300] Molding temperature: 30℃

[0301] Dynamic pressure: 10 bar hydraulic pressure

[0302] m) Atomization

[0303] According to ISO 75201:2011-11, Method B (gravimetric method), fogging is measured on a compression-molded specimen (80 mm diameter + / - 1 mm, 2 mm thickness) cut from an injection-molded sheet. Using this method, the mass (in mg) of fogged condensate on the aluminum foil is determined by weighing the foil before and after the fogging test. The term "fogging" refers to the volatile fraction condensed on glass components (e.g., a vehicle windshield).

[0304] n) Screening of organic emissions (LBS and HBS) by thermal desorption analysis.

[0305] This method describes a semi-quantitative determination of organic compounds released from polyolefins. It is similar to VDA 278 (October 2011), but with specific modifications.

[0306] Samples (injection-molded plates, DIN-A5) are immediately sealed in aluminum-coated polyethylene bags after production and provided to the laboratory within 14 days. In the laboratory, the samples are left open at below 25°C for 7 days. After this period, aliquots of 60 ± 5 mg are prepared from the stored samples. The aliquots should be tailored to maximize the continuous, intact area, rather than by cutting the aliquots into smaller pieces to achieve the largest possible surface area. The diameter of the injection tube should be given priority. The length and thickness are then selected accordingly based on the specified aliquot weight. The aliquots are desorbed directly using heating and a helium flow. Volatile and semi-volatile organic compounds are extracted into the gas flow and cryogenically focused before being injected into a gas chromatography (GC) system for analysis. This method involves two extraction stages: in the analysis of low-boiling-point substances (LBS), the aliquots are desorbed at 90°C for 30 minutes to identify volatile organic compounds with a boiling / elution range up to n-C25 (n-pentane). The analysis of high-boiling-point substances (HBS) involves a 60-minute desorption step on the same aliquot of the sample at 120 °C to identify semi-volatile compounds in the boiling / elution range from n-C14 (n-tetradecane) to n-C32 (n-triadecane).

[0307] Similar to the VOC and FOG values ​​in VDA 278, LBS is calculated using toluene equivalents (TE), and HBS is calculated using hexadecane equivalents (HE), with semi-quantitative and appropriate calibrations applied. Results are expressed in μg / g.

[0308] The integration parameters for LBS and HBS evaluations were selected such that "area reject" corresponds to an area of ​​1 μg / g (for TE and HE, respectively). Therefore, smaller peaks are not counted in the semi-quantitative results. The GC oven program remains unchanged regardless of whether a calibration run, LBS run, or HBS run is performed. The initial temperature is 50 °C (hold for 1 min), followed by increases at a rate of 10 °C / min, with a final temperature of 320 °C (hold for 10 min). For the GC column, an Agilent DB5: 50 m × 250 μm × 0.25 μm (or an equivalent product) is used. This method requires a thermal desorption system TDS 3 (Gerstel) and a cooling injection system CIS 4 (Gerstel), as well as a GC system with a flame ionization detector (FID), but not a mass spectrometer. The final CIS temperature is always set to 380 °C, not 280 °C.

[0309] o)CIELAB color space (L*a*b*)

[0310] In the CIE L*a*b* uniform color space, the color coordinates are: L* lightness coordinate; a* red / green coordinate, where +a* represents red and -a* represents green; b* yellow / blue coordinate, where +b* represents yellow and -b* represents blue. The L*, a*, and b* coordinate axes define the three-dimensional CIE color space. Testing was performed using a standard Konica / Minolta colorimeter CM-3700A.

[0311] p) Inorganic residues

[0312] Inorganic residues were quantified using Perkin Elmer TGA 8000 according to DIN ISO 1172:1996. Approximately 10–20 mg of material was placed in a platinum dish. The temperature was equilibrated at 50 °C for 10 minutes, then increased to 950 °C at a heating rate of 20 °C / min under nitrogen. The ash content was assessed as % by weight at 850 °C.

[0313] q) Limonene detection

[0314] Limonene was quantified using solid-phase microextraction (HS-SPME-GC-MS) via a standard addition method.

[0315] 50 mg of the ground sample was weighed into a 20 mL headspace vial. Different concentrations of limonene and a glass-coated magnetic stir bar were added, and the vial was sealed with a silicone / PTFE-lined magnetic cap. Diluted limonene standards of known concentrations were added to the sample using a microcapillary (10 pL). 0, 2, 20, and 100 ng (equivalent to 0 mg / kg, 0.1 mg / kg, 1 mg / kg, and 5 mg / kg) of limonene were added, and 6.6 mg / kg, 11 mg / kg, and 16.5 mg / kg standard amounts of limonene were also used in combination with some samples tested in this application. Quantification was performed using Ion 93 obtained in SIM mode. Enrichment of the volatile fraction was performed by headspace solid-phase microextraction using a 2 cm stable flexible 50 / 30 pm DVB / Carboxen / PDMS fiber at 60 °C for 20 min. Desorption was performed directly at 270 °C in the heated inlet of the GCMS system.

[0316] GCMS parameters:

[0317] Chromatographic column: 30m HP 5MS 0.25*0.25;

[0318] Injector: splitless, equipped with a 0.75mm SPME liner, 270℃;

[0319] Temperature program: -10℃ (hold for 1 minute);

[0320] Carrier gas: Helium 5.0, linear velocity 31 cm / s, constant flow;

[0321] Mass spectrometer (MS): single quadrupole, direct interface, interface temperature 280℃;

[0322] Data acquisition mode: SIM scanning mode;

[0323] Scan parameters: 20-300 amu;

[0324] SIM parameters: m / Z 93, 100ms dwell time.

[0325] experiment

[0326] a) Multiphase propylene copolymers HECO1, HECO2 and HECO3

[0327] Catalyst system:

[0328] For the polymerization processes of HECO2 and HECO3, a conventional high-yield MgCl2-supported Ziegler-Natta polypropylene catalyst component is used, which contains diethyl phthalate as an internal donor. This catalyst component and its preparation method are described, for example, in patent publications EP491566, EP591224, and EP586390.

[0329] Therefore, the catalyst component was prepared as follows: First, under inert conditions, 0.1 mol MgCl2 x 3 EtOH was suspended in 250 ml of decane in a reactor at atmospheric pressure. The solution was cooled to -15°C and 300 ml of cold TiCl4 was added, while maintaining the temperature at the stated temperature. Then, the temperature of the slurry was slowly increased to 20°C. At this temperature, 0.02 mol dioctyl phthalate (DOP) was added to the slurry. After the addition of the phthalate, the temperature was increased to 135°C over 90 minutes and the slurry was maintained for 60 minutes. Then, another 300 ml of TiCl4 was added, and the temperature was maintained at 135°C for 120 minutes. Afterward, the catalyst was filtered from the liquid and washed six times with 300 ml of heptane at 80°C. Then, the solid catalyst component was filtered off and dried.

[0330] The catalyst was further modified (VCH modification of the catalyst). Under room temperature and inert conditions, 35 ml of mineral oil (Paraffinum Liquidum PL68) was added to a 125 ml stainless steel reactor, followed by the addition of 0.82 g of triethylaluminum (TEAL) and 0.33 g of dicyclopentyldimethoxysilane (donor D). After 10 minutes, 5.0 g of the catalyst prepared above (Ti content: 1.4 wt%) was added, followed by 5.0 g of vinylcyclohexane (VCH) after another 20 minutes. The temperature was raised to 60 °C over 20 minutes and maintained at this temperature for 20 hours. Finally, the temperature was lowered to 20 °C and the concentration of unreacted VCH in the oil / catalyst mixture was analyzed, finding it to be 200 ppm by weight.

[0331] The catalyst used to prepare HECO1 is a Ziegler-Natta catalyst, commercially available from Lyondell Basell (Italy), under the trade name ZN180M.

[0332] HECO1 was prepared in a configuration of prepolymerization / circulation reactor / gas phase reactor 1 / gas phase reactor 2, followed by a granulation step.

[0333] HECO2 and HECO3 were prepared in a configuration of prepolymerization / circulation reactor / gas phase reactor 1 / gas phase reactor 2 / gas phase reactor 3, followed by a granulation step.

[0334] For HECO1, HECO2 and HECO3, the catalyst system specified above is used in combination with triethylaluminum (TEAL) as a co-catalyst and dicyclopentadienyldimethoxysilane (donor D) as an external donor.

[0335] The polymerization conditions are shown in Table 1.

[0336] Table 1: Polymerization conditions for HECO

[0337]

[0338]

[0339] In a Coperion ZSK 47 co-rotating twin-screw extruder, multiphase copolymers HECO1, HECO2, and HECO3 were compounded with 0.15 wt% antioxidant (Irganox B215FF, from BASF AG, Germany; this is a 1:2 mixture of pentaerythritol tetrakis(3-(3',5'-di-tert-butyl-4-hydroxyphenyl)propionate (CAS No.: 6683-19-8) and tris(2,4-di-tert-butylphenyl) phosphite (CAS No.: 31570-04-4)) and 0.05 wt% calcium stearate (CAS No.: 1592-23-0, commercially available from Faci, Italy) at 220°C.

[0340] The particles of multiphase copolymers HECO1, HECO2 and HECO3 are ventilated before use to remove volatile organic components, as described in EP 3 786 190 A1.

[0341] b) Polypropylene blends

[0342] The properties of the mixed plastic polypropylene blends are shown in Table 2.

[0343] Table 2: Properties of Polypropylene Blends

[0344]

[0345] Particles of mixed plastic polypropylene blends are ventilated before use to remove volatile organic components, as described in EP 3 786 190A1.

[0346] c) Mixing of the inventive composition with the comparative composition

[0347] The inventive compositions and comparative compositions were prepared by compounding in a Coperion ZSK 40 co-rotating twin-screw extruder at 220°C according to the formulations shown in Table 3.

[0348] In addition to the HECO and mixed plastic polypropylene blends mentioned above, the following commercially available components were also used:

[0349] The plastomer 1 is an elastic ethylene-octene copolymer, commercially known as Engage 8180, available from Dow Chemical Company (USA), with an MFR2 (190°C) of 0.5 g / 10 min and a density of 863 kg / m³. 3 .

[0350] The plastomer 2 elastic ethylene-octene copolymer, traded as Engage 8842, is commercially available from Dow Chemical Company (USA), with an MFR2 (190°C) of 1.0 g / 10 min and a density of 857 kg / m³.3 .

[0351] The filler 1 is talc, traded under the name HAR T84, and is available from Imerys (France). It has a median diameter d50 of 2.0 μm and a top cut diameter d95 of 10.0 μm.

[0352] The filler 2 is talc, commercially known as Jetfine 3CA, and is available from Imerys (France). It has a median diameter d50 of 3.9 μm and a top cut diameter d95 of 7.8 μm.

[0353] Black MB is derived from Borealis AG (Norway) polyethylene masterbatch CBMB LD-09 A02. It contains 40 wt% pigment.

[0354] White MB is from Masterminds PE white 90 / 1111, a polyethylene masterbatch from QolorTech (Netherlands). It contains 70 wt% pigment.

[0355] Additive MB1 additive masterbatch consists of the following components: 1.50 wt% carrier propylene homopolymer, trade name HC001 A, available from Borealis AG (Austria); 0.10 wt% antioxidant, trade name Irgafos168 (CAS No.: 31570-04-4), available from BASF AG (Germany); 0.15 wt% antioxidant, trade name Irganox 1076 (CAS No.: 2082-79-3), available from BASF AG (Germany); 0.40 wt% bisphenol A-epoxy resin, trade name Araldite GT 7072ES (CAS No.: 25036-25-3), available from Huntsman Corporation (USA); 2.00 wt% silicone masterbatch, i.e., dimethylsiloxane:polypropylene = 50:50, from Dow Corning; and 0.20 wt% of UV stabilizer masterbatch, traded under the name Cyasorb UV-3808PP5, available commercially from Cytec Industries, Inc. (USA).

[0356] Additive MB2 masterbatch consists of the following components: 1.20 wt% carrier propylene homopolymer, trade name HC001 A, available from Borealis AG (Austria); 0.10 wt% antioxidant, trade name Irgafos168 (CAS No.: 31570-04-4), available from BASF AG (Germany); 0.25 wt% antioxidant, trade name Irganox 1076 (CAS No.: 2082-79-3), available from BASF AG (Germany); 0.50 wt% bisphenol A-epoxy resin, trade name Araldite GT 7072ES (CAS No.: 25036-25-3), available from Huntsman Corporation (USA); 2.00 wt% silicone masterbatch, i.e., dimethylsiloxane:polypropylene = 50:50, from Dow Corning; 0.20 wt% of UV stabilizer masterbatch, traded under the name Cyasorb UV-3808PP5, available from Cytec Industries, Inc. (USA); and 0.20 wt% of lubricant, traded under the name Crodamide EBS beads (CAS No.: 203-755-6), available from Croda International (UK).

[0357] The formulations of the inventive composition and the comparative composition are shown in Table 3.

[0358] The properties of the inventive composition and the comparative composition are shown in Table 4.

[0359]

[0360]

[0361]

[0362] Figure 1 The performance balance of surface appearance, rigidity, and impact properties of Examples IE1-IE5 and CE1-CE6 is shown as a graph of tiger stripe (MSE surface quality, 1.5s) versus rigidity-impact coefficient (tensile modulus * Charpy NIS (+23°C)). The lower the MSE value and the higher the coefficient, the better the quality of the compound.

[0363] according to Figure 1 It can be seen that, compared with CE1-CE4, the invention demonstrates an improved balance of surface appearance, rigidity, and impact performance, and compared with CE5 and CE6, it demonstrates a comparable balance of performance.

[0364] The invention also demonstrates good processability (melt flow rate), scratch resistance, and low emissions (LBS, HBS, atomization), making it suitable as an injection molding composition for automotive interior applications.

[0365] The invention demonstrates that materials with comparable or even superior performance can be obtained by using 15-45 wt% high content of regenerated materials and 5-10 wt% low content of talc.

Claims

1. A composition suitable for automotive applications, which can be obtained by blending at least components (A), (B), (C), (D) and (E): (A) 5.0 to 40.0 wt% of a first multiphase propylene copolymer; (B) Greater than 20.0 to 35.0 wt% of a second multiphase propylene copolymer; (C) 10.0 to 50.0 wt% of mixed plastic polypropylene blends; (D) 2.5 wt% to 15.0 wt% of ethylene-based plastics; and (E) 2.5 wt% to less than 12.5 wt% inorganic filler; All percentages are based on the total amount of the composition, and The first multiphase propylene copolymer (A) comprises a matrix phase and an elastomer phase dispersed therein, and the first multiphase propylene copolymer (A) has: - Melt flow rate (MFR2) measured according to ISO 1133 at 230°C and 2.16 kg is in the range of 90 to 250 g / 10 min; and - The intrinsic viscosity (iV(SF)) of the soluble fraction, as determined by CRYSTEX QC analysis according to DIN ISO 1628 / 1, is in the range of 1.50 to 4.00 dl / g; The second multiphase propylene copolymer (B) comprises a matrix phase and an elastomer phase dispersed therein, and the second multiphase propylene copolymer (B) has: - Melt flow rate (MFR2) measured according to ISO 1133 at 230°C and 2.16 kg is in the range of 3.0 to 30 g / 10 min; and - The intrinsic viscosity (iV(SF)) of the soluble fraction, as determined by CRYSTEX QC analysis according to DIN ISO 1628 / 1, is in the range of 4.10 to 10.00 dl / g; The blended plastic polypropylene blend (C) has the following characteristics: - The crystalline fraction (CF) content, as determined by CRYSTEX QC analysis, ranged from 85.0 to 96.0 wt%. - The soluble fraction (SF) content, as determined by CRYSTEX QC analysis, ranges from 4.0 to 15.0 wt%, of which... -The crystalline fraction (CF) is quantified 13 The ethylene content (C2(CF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy was in the range of 1.0 to 10.0 wt%, and - The intrinsic viscosity (iV(SF)) of the soluble fraction (SF) is in the range of 0.9 to 2.1 dl / g; Vinyl plasmon (D) is a copolymer of ethylene and comonomer units selected from α-olefins having 3 to 12 carbon atoms, and vinyl plasmon (D) has: - The melt flow rate (MFR2) measured according to ISO 1133 at 190°C and 2.16 kg is 0.2 to 2.5 g / 10 min; and - The density, as determined by ISO 1183, is 850 to 870 kg / m³. 3 ;and The melt flow rate (MFR2) of the composition, as determined according to ISO 1133 at 230°C and 2.16 kg, is in the range of 5.0 to less than 20.0 g / 10 min.

2. The composition according to claim 1, wherein, The inorganic filler (E) is talc, which has the following properties: - Median particle size d before blending 50 The range is from 0.3 to 30.0 micrometers; and / or - Top cut particle size d before blending 95 The range is from 1.0 to 50.0 micrometers.

3. The composition according to claim 1, wherein the composition has a crystalline fraction (CF) and a soluble fraction (SF) in CRYSTEX QC analysis, wherein, - The crystalline fraction (CF) content, as determined by CRYSTEX QC analysis, is in the range of 65.0 to 85.0 wt%, and - The soluble fraction (SF) content, as determined by CRYSTEX QC analysis, ranges from 15.0 to 35.0 wt%, of which... - The crystalline fraction (CF) is quantified 13 The ethylene content (C2(CF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy was in the range of 1.0 to 10.0 wt%; and / or - The intrinsic viscosity (iV(CF)) of the crystalline fraction (CF) as determined according to DIN ISO 1628 / 1 is less than 2.0 dl / g; and / or - The soluble fraction (SF) is quantified 13 The ethylene content (C2(SF)) determined by FT-IR spectroscopy calibrated by C-NMR spectroscopy is in the range of 30 to 50 wt%; and / or - The intrinsic viscosity (iV(SF)) of the soluble fraction (SF) as determined according to DIN ISO 1628 / 1 is greater than 2.1 dl / g; and / or - The ratio of the intrinsic viscosity of the soluble fraction to the intrinsic viscosity of the crystalline fraction of the composition (iV(SF) / iV(CF)) is greater than 1.0; and / or - The ratio of ethylene content (C2(SF) / C2(CF)) of the soluble fraction and the crystalline fraction of the composition is from 2.5 to 15.

0.

4. The composition according to claim 1, wherein the tensile modulus of the composition, as determined according to ISO 527-2, is from 1200 MPa to 2200 MPa.

5. The composition according to claim 1, wherein the composition has the following Charpy notched impact strength as determined according to ISO 179 1eA at +23°C or -20°C: a Charpy notched impact strength of 7.5 kJ / m at 23°C. 2 Up to 55.0 kJ / m 2 And / or Charpy notched impact strength at -20°C is 2.5 kJ / m 2 Up to 10.0 kJ / m 2 .

6. The composition according to claim 1, wherein the composition has one or more of the following properties: - The content of low-boiling-point organic matter (LBS) determined by screening organic emissions by thermal desorption analysis is in the range of 5 to 100 μg / g; - The content of high-boiling-point organic compounds (HBS) determined by thermal desorption analysis of organic emissions is in the range of 100 to 500 μg / g; and - According to gravimetric method DI 75201:2011-11, the nebulization amount determined by method B is in the range of 0.05 to 1.00 mg.

7. An article comprising the composition of any one of claims 1 to 6 in an amount of 90 wt% to 100 wt%.

8. The article according to claim 7, wherein the article is a molded article.

9. The article of claim 7, wherein the MSE surface quality of the article is less than 25 at 1.5s, and / or less than 15 at 3s, and / or less than 15 at 6s, wherein, MSE surface quality was determined on a plate with dimensions of 440×148×2.8mm, manufactured with different fill times of 1.5, 3 and 6 seconds, and having a grain size of VW K50 and a 1.4mm film gate. The MSE surface quality was calculated by illuminating the plate with a specified light source LED in a closed environment, recording images with a CCD camera system, analyzing the images, and calculating the MSE surface quality.

10. The article of claim 7, wherein the MSE surface quality of the article at 1.5s satisfies the following dimensionless inequality (I): MSE, 1.5 s < 0.00015 · TM · ​​Charpy NIS, 23℃ + 20 in, MSE, 1.5 s is the surface quality of the MSE at 1.5 s, which is determined on a plate with dimensions of 440 × 148 × 2.8 mm, manufactured with different fill times of 1.5 seconds, the plate having grain VW K50 and a 1.4 mm film gate, the MSE surface quality is calculated by illuminating the plate with a specified light source LED in a closed environment, recording images with a CCD camera system, analyzing the images and calculating the surface quality of the MSE. TM stands for tensile modulus, determined according to ISO 527-2, and its unit is [MPa]. -1 ];as well as Charpy NIS, 23℃ represents the Charpy notched impact strength, determined according to ISO 179 1eA at +23℃, with units of [m]. 2 / kJ].

11. The article according to any one of claims 7 to 10, wherein the surface quality of the article at 3s satisfies the following dimensionless inequality (II): MSE, 3 s < -0.5 · packing + 15 in, MSE, 3 s, is the surface quality of the material at 3 seconds, measured on a plate with dimensions of 440 × 148 × 2.8 mm, manufactured with different fill times of 3 seconds. The plate has a grain size of VW K50 and a 1.4 mm film gate. The surface quality was calculated by illuminating the plate with a specified light source LED in a closed environment, recording images with a CCD camera system, analyzing the images, and calculating the MSE surface quality. The filler is the content of inorganic filler (E), expressed in units of [1 / wt%].

12. The article of claim 7, wherein the article has a scratch resistance of 0.00 to 1.00 at 10N.

13. Use of the composition according to any one of claims 1 to 6 for injection-molded articles.

Images