Polypropylene composition, process for its preparation and use thereof

Abstract

The application discloses a polypropylene composition, a preparation method and application thereof. The polypropylene composition comprises the following components in parts by weight: 49-88 parts of polypropylene, 5-20 parts of ethylene-octene random copolymer, 1-5 parts of a surface modifier, 1-2 parts of a scratch-resistant agent, 0.2-1.5 parts of a scratch-resistant synergist and 5-20 parts of a filler. The surface modifier is an ethylene-propylene polyolefin elastomer; the scratch-resistant agent is a silicone scratch-resistant agent; and the scratch-resistant synergist is boron nitride. The polypropylene composition has no appearance defect, excellent scratch resistance, a short injection molding cycle and can meet the requirement of a shorter and shorter injection molding time.

Description

Technical Field

[0001] This invention belongs to the technical field of plastics, and more specifically, relates to a polypropylene composition, its preparation method, and its application. Background Technology

[0002] Polypropylene is widely used in automobiles due to its low density, high cost-effectiveness, excellent heat resistance, rigidity, resistance to chemical corrosion, and ease of processing, molding, and recycling. It has become the most widely used and fastest-growing type of plastic in the automotive industry.

[0003] In the process of modifying polypropylene for use in automotive interior and exterior parts, the polypropylene formulation often employs ethylene-octene random copolymers (EOCs) as toughening agents to modify the polypropylene. EOCs significantly improve the low-temperature impact toughness of polypropylene, reducing the risk of brittle fracture. Currently, the injection molding time for automotive interior and exterior parts using polypropylene is typically 80-90 seconds. However, in actual production, the injection time is often shortened (to within 60-70 seconds) to improve production efficiency. However, due to the relatively poor compatibility between EOCs and polypropylene, surface defects (such as air marks and ghosting) can occur in the injection-molded parts, especially when the injection cycle is shortened. Furthermore, the poor compatibility leads to poor dispersion of components in the system, further affecting the scratch resistance of the modified polypropylene material. Summary of the Invention

[0004] In view of the above-mentioned existing technical problems, the primary objective of the present invention is to provide a polypropylene composition having a high-quality surface appearance, no appearance defects, and excellent scratch resistance; in addition, the injection molding cycle is shorter.

[0005] A second objective of this invention is to provide a method for preparing a polypropylene composition.

[0006] A third objective of this invention is to provide an application of a polypropylene composition in automotive parts.

[0007] A fourth objective of this invention is to provide an instrument panel.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solution: This invention claims protection for a polypropylene composition comprising, by weight, the following components: 49-88 parts polypropylene, 5-20 parts ethylene-octene random copolymer, 1-5 parts surface improver, 1-2 parts scratch resistant agent, 0.2-1.5 parts scratch resistant synergist, and 5-20 parts filler. The surface improver is an ethylene-propylene polyolefin elastomer; The scratch-resistant agent is a silicone-based scratch-resistant agent; The scratch-resistant synergist is boron nitride.

[0009] This invention uses ethylene-propylene polyolefin elastomer as a surface improver. Compared to other existing compatibilizers, based on the principle of "like dissolves like," ethylene-propylene polyolefin elastomer can significantly improve the homogeneity of the polypropylene and ethylene-octene random copolymer system, thus providing excellent surface improvement and enhancing the appearance and scratch resistance of the polypropylene composition. Furthermore, this invention uses a combination of silicone-based scratch-resistant agents and boron nitride. The silicone-based scratch-resistant agents can migrate to the material surface to form a lubricating film. In addition, compared to other lubricants, the silicone-based scratch-resistant agents can significantly improve the dispersibility of boron nitride in the polypropylene system, thereby effectively improving the appearance and scratch resistance of the polypropylene composition.

[0010] This invention uses ethylene-propylene polyolefin elastomer as a surface improver, combines silicone-based scratch-resistant agents with boron nitride, and integrates ethylene-octene random copolymer, fillers, and other components in the system to significantly improve the appearance of the polypropylene composition, resulting in no appearance defects and excellent scratch resistance. Furthermore, it features a shorter injection molding cycle, meeting the increasingly shorter injection molding time requirements and improving production efficiency.

[0011] Specifically, the number of parts of polypropylene can be 50 parts, 55 parts, 60 parts, 65 parts, 70 parts, 75 parts, 80 parts, 85 parts, 87 parts, etc., or any range formed by the above values, such as 50-70 parts, 55-80 parts, and the present invention is not limited thereto. Specifically, the number of parts of filler can be 7 parts, 9 parts, 11 parts, 13 parts, 15 parts, 17 parts, 19 parts, etc., or any range formed by the above values, such as 11-15 parts, 7-15 parts, and the present invention is not limited thereto. Specifically, the number of parts of ethylene-octene random copolymer can be 7 parts, 9 parts, 11 parts, 13 parts, 15 parts, 17 parts, 19 parts, etc., or any range formed by the above values, such as 11-15 parts, 7-17 parts, and the present invention is not limited thereto. Specifically, the amount of surface improver can be 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, etc., or any range formed by the above values, such as 1.5-2.5 parts, 3-4 parts, and the present invention is not limited thereto. Specifically, the amount of scratch-resistant agent can be 1.2 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts, etc., or any range formed by the above values, such as 2.5-3.2 parts, 3-3.8 parts, and the present invention is not limited thereto. Specifically, the amount of scratch-resistant synergist can be 0.5 parts, 0.7 parts, 0.9 parts, 1.1 parts, 1.3 parts, etc., or any range formed by the above values, such as 0.5-1.3 parts, 0.7-1.5 parts, and the present invention is not limited thereto.

[0012] Specifically, in this invention, polypropylene accounts for no less than 49.2% of the mass percentage of the polypropylene composite material. Preferably, polypropylene accounts for 60-75% of the mass percentage of the polypropylene composite material. More preferably, polypropylene accounts for 65.4-72.5% of the mass percentage of the polypropylene composite material.

[0013] Specifically, the D50 particle size of the boron nitride is 80 nm-3 μm. More preferably, the D50 particle size of the boron nitride is 90 nm-500 nm. More preferably, the D50 particle size of the boron nitride is 90 nm-200 nm. Specifically, the D50 particle size of the boron nitride can be 85 nm, 90 nm, 95 nm, 100 nm, 110 nm, 120 nm, 150 nm, 200 nm, 400 nm, 600 nm, 800 nm, 1000 nm, 1500 nm, 2000 nm, 2500 nm, etc., or any range formed by the above values, and the present invention is not limited thereto.

[0014] Preferably, the boron nitride accounts for 0.2-2% of the mass of the above polypropylene composition.

[0015] Specifically, silicone-based scratch-resistant agents can be added directly or in masterbatch form. When added in masterbatch form, the carrier resin can be polypropylene or low-density polyethylene, and the effective content of polysiloxane in the masterbatch can be selected as 40-55%; it can be further selected as 48-52%; the polysiloxane can be selected as polydimethylsiloxane.

[0016] Preferably, the polypropylene is selected from at least one of (a) to (c): (a) The polypropylene is a binary block copolymer polypropylene synthesized from ethylene and propylene; (b) The melt flow rate of the polypropylene at 230°C and 2.16 kg is 20-60 g / 10 min; (c) The ethylene content in the polypropylene is 5-20 wt%.

[0017] Specifically, the melt flow rate of the polypropylene at 230℃ and 2.16 kg is 27-60 g / 10 min. More specifically, the melt flow rate of the polypropylene at 230℃ and 2.16 kg can be 25 g / 10 min, 27 g / 10 min, 30 g / 10 min, 35 g / 10 min, 40 g / 10 min, 45 g / 10 min, 50 g / 10 min, 55 g / 10 min, etc., or any range formed by the above values, such as 30-50 g / 10 min, 27-55 g / 10 min; the present invention is not limited thereto. Specifically, the test method for the melt flow rate of the polypropylene is GB / T 3682.1-2018.

[0018] Preferably, the polypropylene has a melt flow rate of 50-60 g / 10 min at 230°C and 2.16 kg. This preferred setting improves the scratch resistance of the polypropylene composition.

[0019] Specifically, the ethylene content in the polypropylene is 5.5-13.5 wt%. Specifically, the ethylene content in the polypropylene can be 7 wt%, 9 wt%, 11 wt%, 13 wt%, 15 wt%, 17 wt%, 19 wt%, etc., or any range formed by the above values, such as 5.5-10 wt%, 11-13.5 wt%, etc., and the present invention is not limited thereto.

[0020] Preferably, the ethylene-propylene polyolefin elastomer is selected from at least one of the following (d) to (e): (d) The melt flow rate of the ethylene-propylene polyolefin elastomer at 190°C and 2.16 kg is 0.5-10 g / 10 min; (e) The ethylene content in the ethylene-propylene polyolefin elastomer is 15-40 wt%.

[0021] Specifically, the melt flow rate of the ethylene-propylene polyolefin elastomer at 190°C and 2.16 kg is 1.3-7.4 g / 10 min. More specifically, the melt flow rate of the ethylene-propylene polyolefin elastomer at 190°C and 2.16 kg can be 1 g / 10 min, 3 g / 10 min, 5 g / 10 min, 7 g / 10 min, 9 g / 10 min, etc., or any range formed by the above values, such as 0.5-5 g / 10 min, 1.3-7 g / 10 min; the present invention is not limited thereto. Specifically, the test method for the melt flow rate of the ethylene-propylene polyolefin elastomer is GB / T 3682.1-2018.

[0022] Preferably, the ethylene-propylene polyolefin elastomer has a melt flow rate of 5-7.4 g / 10 min at 190°C and 2.16 kg. This preferred setting further improves the scratch resistance of the polypropylene composition.

[0023] Specifically, the ethylene content in the ethylene-propylene polyolefin elastomer can be 20wt%, 25wt%, 30wt%, 35wt%, etc., or any range formed by the above values, such as 15-20wt%, 16-30wt%, etc., and the present invention is not limited thereto. Specifically, the ethylene content in the ethylene-propylene polyolefin elastomer is 15-16wt%.

[0024] Preferably, the ethylene-propylene polyolefin elastomer accounts for 1-5% of the mass percentage of the above polypropylene composition.

[0025] Preferably, the melt flow rate of the ethylene-octene random copolymer at 190°C and 2.16 kg is 0.5-20 g / 10 min. More preferably, the melt flow rate of the ethylene-octene random copolymer at 190°C and 2.16 kg is 1-5 g / 10 min. The melt flow rate of the ethylene-octene random copolymer can be 1 g / 10 min, 3 g / 10 min, 5 g / 10 min, 8 g / 10 min, 10 g / 10 min, 13 g / 10 min, 15 g / 10 min, 18 g / 10 min, etc., or any range formed by the above values, such as 1-10 g / 10 min, 2-15 g / 10 min, etc., and the present invention is not limited thereto. Specifically, the test method for the melt flow rate of the ethylene-octene random copolymer is ISO 1133.

[0026] Preferably, the filler is selected from at least one of basic magnesium sulfate whiskers, talc, and calcium carbonate.

[0027] Preferably, the filler is at least one of talc and calcium carbonate; the D50 particle size of the filler is ≤6μm. More specifically, the D50 particle size of the filler is 3-6μm. Specifically, the test method for the D50 particle size of the filler is GB / T19077.1-2008.

[0028] Preferably, the filler is talc. This preferred method can better improve the scratch resistance of the polypropylene composition.

[0029] Preferably, the diameter of the basic magnesium sulfate whiskers is ≤3 μm. More preferably, the diameter of the basic magnesium sulfate whiskers is 1-3 μm. Preferably, the length of the basic magnesium sulfate whiskers is ≥25 μm. More preferably, the length of the basic magnesium sulfate whiskers is 25-45 μm. More specifically, the test method for the diameter and length of the basic magnesium sulfate whiskers is: HG / T 6318-2024.

[0030] Preferably, the polypropylene composition further includes at least one of a lubricant, a light stabilizer, and an antioxidant.

[0031] Preferably, at least one of the following (f) to (h): (f) The lubricant is selected from at least one of amide lubricants, stearic acid lubricants, and stearate lubricants; (g) The antioxidant is selected from at least one of hindered phenolic antioxidants and phosphite antioxidants; (h) The light stabilizer is a hindered amine light stabilizer.

[0032] Specifically, the lubricant includes, but is not limited to, oleamide, erucamide, ethylene bis-stearamide, sodium arylamide fatty acid, stearic acid, calcium stearate, zinc stearate, etc.

[0033] Specifically, the antioxidants include, but are not limited to, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], triethylene glycol ether-di(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate, 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, 2,2'-methylenebis(4-methyl-6-tert-butylphenol), tris(2,4-di-tert-butylphenyl) phosphite, bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite, and tris(nonylphenyl) phosphite.

[0034] Specifically, the light stabilizers include, but are not limited to, bis(2,2,6,6-tetramethyl-4-piperidine) sebacate, poly-{[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl]-[(2,2,6,6-tetramethyl-4-piperidine)imino]-1,6-hexanediyl}, and bis(1-octoxy-2,2,6,6-tetramethyl-4-piperidine) sebacate.

[0035] Preferably, the polypropylene composition comprises 0-1 parts by weight of lubricant; more preferably, the polypropylene composition comprises 0.1-0.3 parts by weight of lubricant.

[0036] Preferably, the polypropylene composition comprises, by weight, 0-1 parts of light stabilizer; more preferably, the polypropylene composition comprises, 0.1-0.3 parts of light stabilizer.

[0037] Preferably, the polypropylene composition comprises, by weight, 0-1 parts of antioxidant; more preferably, the polypropylene composition comprises, 0.2-0.6 parts of antioxidant.

[0038] Furthermore, the present invention claims protection for a method for preparing a polypropylene composition, wherein the raw materials are mixed evenly and then melt-extruded to obtain the polypropylene composition.

[0039] Preferably, the melt extrusion temperature is 170-220℃.

[0040] Preferably, the melt extrusion is performed using a twin-screw extruder. More specifically, the length-to-diameter ratio of the twin-screw extruder is 42-62:1.

[0041] Preferably, the vacuum degree is controlled to be ≤-0.08MPa during the melt extrusion process.

[0042] Furthermore, this invention seeks protection for the use of polypropylene compositions in automotive parts.

[0043] Furthermore, the present invention claims protection for an instrument panel prepared using the above-described polypropylene composition.

[0044] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a polypropylene composition having a high-quality surface finish, free from defects, and excellent scratch resistance; furthermore, the polypropylene composition can meet the requirements of short injection molding cycle time, thereby improving production efficiency. Detailed Implementation

[0045] The present invention will be further described below with reference to the specification and specific embodiments, but the embodiments do not limit the present invention in any way. Unless otherwise specified, the reagents, methods and equipment used in the present invention are conventional reagents, methods and equipment in this technical field.

[0046] Polypropylene 1, a binary block copolymer polypropylene synthesized from ethylene and propylene, with an ethylene content of 5.5 wt%, a melt flow rate of 60 g / 10 min at 230℃ and 2.16 kg, BI871, Hanwha Total.

[0047] Polypropylene 2, a binary block copolymer polypropylene synthesized from ethylene and propylene, with an ethylene content of 13.5 wt%, a melt flow rate of 27 g / 10 min at 230℃ and 2.16 kg, EP240R, CNOOC Shell.

[0048] Toughening agent 1, ethylene-octene random copolymer, Engage 8842, Dow Chemical.

[0049] Toughening agent 2, ethylene-octene random copolymer, Engage 8200, Dow Chemical.

[0050] Surface improver 1, ethylene-propylene polyolefin elastomer, melt flow rate of 1.3 g / 10 min at 190 °C and 2.16 kg, ethylene content of 16 wt%, Vistamaxx 6102, ExxonMobil.

[0051] Surface improver 2, ethylene-propylene polyolefin elastomer, melt flow rate of 9.1 g / 10 min at 190 °C and 2.16 kg, ethylene content of 15 wt%, Vistamaxx 6202, ExxonMobil.

[0052] Surface improver 3, maleic anhydride grafted polypropylene, PC-1, Nanhai Baichen New Materials Co., Ltd.

[0053] Filler 1, talc powder, D50 particle size of 6μm, TYT-777A, Liaoning Tianyuan.

[0054] Filler 2, basic magnesium sulfate whiskers, WS1-S2, Yingkou Wesker Chemical.

[0055] Filler 3, heavy calcium carbonate, particle size D50=6μm, Guangxi Xingai Mining.

[0056] Scratch-resistant agent 1, silicone scratch-resistant agent, polysiloxane effective content is 50%, AS-025, Shanghai Handian New Materials Co., Ltd.

[0057] Scratch-resistant agent 2, silicone scratch-resistant agent, polysiloxane effective content is 50%, BZPP301, Chongqing Baozhuan New Material Technology Co., Ltd.

[0058] Scratch-resistant agent 3, amide-based scratch-resistant agent, erucamide, Tunan New Materials Co., Ltd.

[0059] Scratch-resistant agent 4, amide-based scratch-resistant agent, oleamide, Tunan New Materials Co., Ltd.

[0060] Scratch-resistant synergist 1, boron nitride, XH-BN-100, Shanghai Xiaohuang Nanotechnology Co., Ltd.

[0061] Antioxidant 1, hindered phenolic antioxidant, antioxidant 1010, commercially available.

[0062] Antioxidant 2, phosphite antioxidant, Antioxidant 168, commercially available.

[0063] Light stabilizer, UV-3808PP5, Solvay, Belgium.

[0064] Lubricant 1, amide lubricant, TR451, STRUKTOL (USA).

[0065] Lubricant 2, calcium stearate, commercially available.

[0066] Lubricant 3, zinc stearate, commercially available.

[0067] Unless otherwise specified, all components (such as antioxidants and light stabilizers) used in the parallel examples and comparative examples are the same commercially available products.

[0068] Examples 1-12 A polypropylene composition is prepared according to the weight parts of the formulation in Table 1-2 and by a preparation method including the following steps: According to the weight parts described in Table 1-2, all components except the filler are first mixed in a high-speed mixer for 4 minutes (250 rpm), then the filler is added to the high-speed mixer and mixed for another 4 minutes (250 rpm). The mixture is then fed into a twin-screw extruder (length-to-diameter ratio: 48:1) for melt extrusion, granulation, and drying to obtain the polypropylene composition. The temperatures of the twin-screw extruder from the feed section to the die head are 170℃, 200℃, 200℃, 210℃, 210℃, 205℃, 205℃, 205℃, 200℃, and 200℃ respectively. The extrusion employs a dual-vacuum process with a vacuum degree requirement of ≤-0.08 MPa.

[0069] The parts by weight of the scratch-resistant agent in Table 1-3 have been converted to parts by weight of pure polysiloxane.

[0070] Table 1

[0071] Table 2

[0072] Comparative Examples 1-6 The weight proportions of raw materials used in the following comparative examples are shown in Table 3. The preparation method is the same as that in Example 1 above.

[0073] Table 3

[0074] Test case The polypropylene composite materials obtained in the above examples and comparative examples were injection molded into injection molded parts and then tested as follows.

[0075] (1) Appearance test: Visually inspect the surface of the parts to see how many appearance defects there are. Appearance defects are defined as at least one of the following: air marks or ghosting. The classification of appearance defects is shown in Table 4 below.

[0076] (2) Scratch resistance test: The scratch resistance evaluation refers to Volkswagen's PV3952 standard. The test method is as follows: A 1 mm diameter scratch head is used to scratch the sample horizontally and vertically under a 10 N load to form a grid of scratches. The instrument automatically guides the scratch head to move at a speed of 1000 mm / min, with a scratch spacing of 2 mm and a length of 40 mm. At least 20 scratches are made in one direction. Then the sample is rotated 90 degrees and the above process is repeated in the vertical direction to form a grid of scratches.

[0077] Scratch resistance is evaluated by testing the color difference change in the area before and after a grid scratch, with the degree of whitening used to characterize the material's scratch resistance. The L values ​​(reflecting color depth) before and after scratching are measured using a colorimeter, and ΔL is calculated as: L value after scratch - L value before scratching. A larger ΔL value indicates more pronounced whitening after scratching and poorer scratch resistance.

[0078] (3) Molding cycle: The molding time of injection molding polypropylene composite material into a 150*150*3mm square plate injection molded part.

[0079] The test results are shown in Tables 5 and 6 below.

[0080] Table 4

[0081] Table 5

[0082] Table 6

[0083] As shown in Tables 5 and 6 above, the polypropylene composition provided by this invention has a high-quality surface finish, no appearance defects, and excellent scratch resistance; furthermore, the injection molding cycle is shorter. More specifically, the appearance grade of the polypropylene composition provided by this invention is ≤ Grade 1, and ΔL ≤ 0.41, with a molding cycle of ≤ 46s.

[0084] As can be seen from Examples 2, 5, and 7, polypropylene resin or ethylene-propylene polyolefin elastomer has a higher melt flow rate, which can better improve scratch resistance.

[0085] As can be seen from Examples 2 and Comparative Examples 1-3, it is difficult to achieve the technical effect of the present invention when the polypropylene system lacks surface improvers or scratch synergists; and surface improvers and scratch synergists have a synergistic effect on improving the scratch resistance of polypropylene compositions.

[0086] As can be seen from Example 2 and Comparative Example 4, it is difficult to achieve the technical effect of the present invention by using maleic anhydride-grafted polypropylene, which is conventionally used in the art, as a surface improver. The appearance is seriously unsatisfactory, the scratch resistance is poor, and the molding cycle is longer.

[0087] As can be seen from Examples 2, 5, and 6, in the system of the present invention, specific scratch-resistant agents and boron nitride need to be used in combination to achieve the technical effects of the present invention.

[0088] The foregoing examples are merely illustrative, used to explain some features of the method described in this invention. The appended claims are intended to claim the broadest possible scope, and the embodiments presented herein are demonstrated by the applicant's actual experimental results. Therefore, the applicant intends that the appended claims are not limited by the selection of examples illustrating the features of the invention. Some numerical ranges used in the claims also include sub-ranges within them, and variations within these ranges should also be interpreted as being covered by the appended claims where possible.

Claims

1. A polypropylene composition, characterized in that, By weight, it includes the following components: 49-88 parts polypropylene, 5-20 parts ethylene-octene random copolymer, 1-5 parts surface improver, 1-2 parts scratch resistant agent, 0.2-1.5 parts scratch resistant synergist, and 5-20 parts filler. The surface improver is an ethylene-propylene polyolefin elastomer; The scratch-resistant agent is a silicone-based scratch-resistant agent; The scratch-resistant synergist is boron nitride; The polypropylene is a binary block copolymer polypropylene synthesized from ethylene and propylene.

2. The polypropylene composition according to claim 1, characterized in that, The polypropylene is selected from at least one of (b) to (c) below: (b) The melt flow rate of the polypropylene at 230°C and 2.16 kg is 20-60 g / 10 min; (c) The ethylene content in the polypropylene is 5-20 wt%.

3. The polypropylene composition according to claim 1, characterized in that, The ethylene-propylene polyolefin elastomer is selected from at least one of the following (d) to (e): (d) The melt flow rate of the ethylene-propylene polyolefin elastomer at 190°C and 2.16 kg is 0.5-10 g / 10 min; (e) The ethylene content in the ethylene-propylene polyolefin elastomer is 15-40 wt%.

4. The polypropylene composition according to claim 1, characterized in that, The filler is selected from at least one of basic magnesium sulfate whiskers, talc, and calcium carbonate.

5. The polypropylene composition according to claim 1 or 4, characterized in that, The filler is at least one of talc and calcium carbonate; the D50 particle size of the filler is ≤6μm.

6. The polypropylene composition according to claim 1, characterized in that, The polypropylene composition further includes at least one of a lubricant, a light stabilizer, and an antioxidant.

7. The polypropylene composition according to claim 6, characterized in that, Selected from at least one of the following (f) to (h): (f) The lubricant is selected from at least one of amide lubricants, stearic acid lubricants, and stearate lubricants; (g) The antioxidant is selected from at least one of hindered phenolic antioxidants and phosphite antioxidants; (h) The light stabilizer is a hindered amine light stabilizer.

8. A method for preparing the polypropylene composition according to any one of claims 1-7, characterized in that, After the raw materials are mixed evenly, they are melt-extruded to prepare the polypropylene composition.

9. The use of the polypropylene composition according to any one of claims 1-7 in automotive parts.

10. An instrument panel, characterized in that, It is prepared using the polypropylene composition according to any one of claims 1-7.

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