Black-blue phase polypropylene composite material and preparation method thereof

Abstract

The invention discloses a black-blue phase polypropylene composite material and a preparation method thereof, and belongs to the technical field of high polymer materials.According to the material, a low-refractive-index silane coupling agent and hyperbranched polyester are introduced into a polypropylene resin matrix to be used for modifying a black-blue phase coloring agent, and meanwhile fine-scale filler is matched; the product can realize high thermo-oxidative aging resistance and ultraviolet light resistance under the condition of not introducing special auxiliaries or excessive additives, and the appearance stability is high.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, and in particular to a black-blue phase polypropylene composite material and a preparation method thereof. Background Art

[0002] At present, most of the automotive interior decoration products are black-blue phase, which is specifically made of common black pigments such as carbon black and blue pigments such as phthalocyanine blue as colorants, which are then introduced into plastic matrices such as polypropylene resin matrices. However, black-blue phase polypropylene composite materials are prone to aging, powdering, and color change under outdoor exposure or high temperature and high humidity conditions. The main reason is that black-blue phase colorants are more likely to absorb light, especially ultraviolet rays, and convert them into heat compared to other hue colorants, causing oxidation of the colorant and the polypropylene resin matrix.

[0003] In order to inhibit the aging and powdering phenomenon, existing polypropylene composite materials with colorants basically introduce a certain amount of antioxidants and anti-ultraviolet absorbers. However, this approach has little inhibitory effect on black-blue phase polypropylene composite materials and cannot be used in some off-road or convertible car interiors. In addition, as the amount introduced is too much, the preparation cost of the product will also increase significantly. Summary of the invention

[0004] Based on the defects of the prior art, the purpose of the present invention is to provide a black-blue phase polypropylene composite material, which introduces a low-refractive index silane coupling agent and a hyperbranched polyester into a polypropylene resin matrix for modifying a black-blue phase colorant, and is matched with a fine-scale filler, so that the product can achieve high heat-oxidative aging resistance and anti-ultraviolet light effect without introducing special additives or excessive additives, and has high appearance stability.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A black-blue polypropylene composite material comprises the following components in parts by weight:

[0007] 60-80 parts of polypropylene resin, 10-20 parts of filler, 1.5-3.5 parts of colorant, 0.5-2.5 parts of hyperbranched polyester, and 0.5-2.5 parts of siloxane;

[0008] The retained average particle size of the filler is ≤5 μm;

[0009] The refractive index of the siloxane at 25° C. is ≥1.38, and the hyperbranched polyester is an aromatic hyperbranched polyester.

[0010] In order to maintain the stability of product color and appearance, existing plastic materials generally optimize the colorant in the material or introduce specific functional additives (such as antioxidants or ultraviolet absorbers). However, this approach has great limitations on the material matrix and coloring color, and can generally only be used for a few specific resins, or limited to a few specific color systems. At present, black-blue plastic materials mainly use black colorants and blue colorants as colorants. There are few types of pigment raw materials available for these two color systems, generally carbon black and phthalocyanine blue. In this case, there are very few means to modify this type of plastic material, especially polypropylene materials, and the only way is to increase the amount of functional additives added. However, this approach has a limit to improvement. After reaching the limit, further increasing the amount added will only increase the preparation cost. To this end, in the product described in the present invention, silicone with a high refractive index and a specific aromatic hyperbranched polyester are introduced into the polypropylene resin. These components form a protective layer of a black-blue phase colorant in the product to achieve a high UV protection effect. In addition, based on the steric effect and internal lubricity of the aromatic hyperbranched polyester, the colorant can be stably and evenly dispersed in the matrix resin without precipitation or surface aggregation, thereby causing powdering due to heat and oxygen aging during processing or use.

[0011] On the other hand, in the system, simply introducing this colorant cannot support the long-term heat-oxidative aging resistance and UV resistance of the product, because the colorant has a certain amount of creeping in the product, and the polypropylene resin matrix will also have a certain amount of shrinkage, so it needs to be matched with a certain solid filler. When selecting the filler, the size of the filler affects the position fixation of the colorant and the degree of refraction / absorption of ultraviolet light. If the size is too large, it will directly lead to a significant decrease in the heat-oxidative aging resistance and UV resistance of the product, and even the precipitation of the colorant.

[0012] Preferably, in the components of the black-blue phase polypropylene composite material, the weight proportion of the polypropylene resin is 60 parts, 62 parts, 65 parts, 68 parts, 70 parts, 72 parts, 75 parts, 78 parts, 80 parts or any two of the range values; the weight proportion of the filler is 10 parts, 12 parts, 15 parts, 18 parts, 20 parts or any two of the range values; the weight proportion of the colorant is 1.5 parts, 1.8 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts or any two of the range values.

[0013] Preferably, the black-blue phase polypropylene composite material comprises the following components in parts by weight:

[0014] 65-75 parts of polypropylene resin, 12-18 parts of filler, 1.5-3.5 parts of colorant, 0.5-2.5 parts of hyperbranched polyester, and 0.5-2.5 parts of siloxane.

[0015] Preferably, in the components of the black-blue phase polypropylene composite material, the mass percentage of the polypropylene resin is ≥55%.

[0016] Preferably, the melt flow rate of the polypropylene resin at 230° C. and 2.16 kg load according to ASTM D1238-2010 is 0.3-100 g / 10 min; further, the melt flow rate of the polypropylene resin at 230° C. and 2.16 kg load is 20-50 g / 10 min.

[0017] Preferably, the filler includes at least one of talc powder, calcium carbonate, silicon dioxide and mica powder.

[0018] Preferably, the retained average particle size of the filler is 1 to 5 μm;

[0019] More preferably, the retained average particle size of the filler is in the range of one or any two of 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, and 5 μm.

[0020] It should be noted that the test method for the retained average particle size of the filler of the present invention is: calcining the black-blue phase polypropylene composite material at 800° C. for 30 min in an air atmosphere, sieving the ash, and then testing and confirming it with a laser particle size analyzer with reference to the laser diffraction method of particle size distribution in GB / T 19077-2016.

[0021] Preferably, the colorant includes a black colorant and a blue colorant;

[0022] More preferably, the black colorant includes carbon black, and the blue colorant includes phthalocyanine blue;

[0023] More preferably, the average particle size of the carbon black is 10 to 50 nm, the DBP oil absorption value is 100 to 150 mL / 100 g, and the iodine absorption value is 160 to 200 mg / g;

[0024] More preferably, the mass ratio of the black colorant to the blue colorant is 1:(0.2-0.3).

[0025] Preferably, the siloxane has a refractive index of 1.39 to 1.46 at 25°C.

[0026] More preferably, the refractive index of the siloxane at 25° C. is in the range of one or any two of 1.39, 1.396, 1.4, 1.41, 1.42, 1.43, 1.44, 1.45, 1.452, and 1.46.

[0027] It should be noted that the refractive index of the siloxane at 25°C of the present invention is directly tested by using an Abbe refractometer. Before the test, water at 25°C is used for calibration (standard refractive index 1.3325), and then the test temperature is adjusted. The sample is read in the instrument, and the readings are repeated 3 times to take the average value.

[0028] In the product described in the present invention, when constructing a core-shell structured colorant, in order to effectively refract external ultraviolet light to prevent it from completely irradiating the colorant inside the colorant so that it absorbs light and generates heat, thereby causing thermal oxidative aging, especially for specific black-blue phase colorants, it is necessary to use a specific high-refractive index siloxane compounded with a hyperbranched polyester.

[0029] More preferably, the siloxane includes at least one of vinyltriethoxysilane, γ-aminopropyltriethoxysilane, and 3-aminopropyltrimethoxysilane.

[0030] Preferably, the density of the hyperbranched polyester is 1 to 1.2 g / cm 3 , the melting range is 140~180℃.

[0031] The hyperbranched polyester of the present invention adopts aromatic hyperbranched polyester, which has obvious steric hindrance and bonding effect advantages compared with aliphatic hyperbranched polyester or other types of hyperbranched polyester. The colorant modified with siloxane can effectively ensure stability and dispersibility, and has excellent protection effect on the colorant.

[0032] Preferably, the mass ratio of siloxane and hyperbranched polyester modification in the colorant is 1:(0.1-2);

[0033] More preferably, the mass ratio of siloxane to hyperbranched polyester modification in the colorant is in the range of one or any two of 1:0.1, 1:0.2, 1:0.5, 1:0.8, 1:1, 1:1.2, 1:1.5, 1:1.8, 1:2.

[0034] Preferably, the colorant comprises the following components in parts by weight: 1.5 to 2.5 parts of black colorant and 0.4 to 0.6 parts of blue colorant.

[0035] Preferably, the mass ratio of the siloxane to the hyperbranched polyester modification is 1:(1-1.5).

[0036] The content ratio of silicone and hyperbranched polyester as modifying components and protective components will affect the binding properties of the components with the black-blue phase colorant after they are introduced into the components, the dispersibility of the overall components and the light-shielding / refractive effect of the product itself. When the ratio of the two is preferably within the above range, the comprehensive performance of the product is better, especially in terms of resistance to heat and oxygen aging and resistance to ultraviolet light irradiation.

[0037] Preferably, the siloxane, hyperbranched polyester and colorant can be prepared into masterbatch in advance.

[0038] Modifying and coating the colorant in advance can improve the processing efficiency of the product, and can also more accurately adjust the amount of added ingredients. Technical personnel in this field can choose to prepare semi-finished raw materials in the form of masterbatches in advance during product preparation, or use conventional processes to mix the raw materials to prepare the product.

[0039] Preferably, the method for preparing the masterbatch comprises the following steps:

[0040] The black-blue colorant, siloxane and hyperbranched polyester are mixed at 30-40° C. for 5-8 minutes until they are uniform, thereby obtaining the masterbatch.

[0041] It should be noted that the masterbatch of the present invention can be prepared by the conventional direct mixing uniformly method mentioned above, or by other methods, including but not limited to CVD spray modification, etc., as long as it does not affect the color effect of the black-blue phase colorant itself and can achieve similar modification effects as silicone and hyperbranched polyester, so that the heat-oxidative aging resistance, UV resistance and good appearance of the prepared final product meet expectations, there are no restrictions.

[0042] Preferably, the components of the black-blue phase polypropylene composite material also include 5 to 15 parts of a toughening agent.

[0043] Further preferably, the toughening agent includes at least one of ethylene-octene copolymer, ethylene-butene copolymer, and ethylene-butene block copolymer elastomer.

[0044] Further preferably, the toughening agent has a melt flow rate of 0.5 to 10 g / 10 min at 190° C. and a load of 2.16 kg according to ASTM D1238-2010.

[0045] In the case of introducing fillers, since the product is often used in the preparation of automotive interior products, those skilled in the art may introduce certain toughening agents to maintain the overall elasticity and toughness balance of the material. However, those skilled in the art may not introduce toughening agents based on actual use requirements if there is no index limit on mechanical properties, thereby further reducing the preparation cost of the product.

[0046] Preferably, the components of the black-blue phase polypropylene composite material also include 0.1 to 1 part of an antioxidant and 0.1 to 1 part of an ultraviolet absorber.

[0047] More preferably, the antioxidant includes at least one of a hindered phenol antioxidant and a phosphite antioxidant.

[0048] More preferably, the ultraviolet absorber includes at least one of a hindered amine ultraviolet absorber, a triazine ultraviolet absorber, a benzophenone ultraviolet absorber, and a benzotriazole ultraviolet absorber.

[0049] In the components of the black-blue phase polypropylene composite material of the present invention, in order to further improve the product's resistance to heat-oxidative aging and ultraviolet light irradiation, those skilled in the art can additionally introduce appropriate amounts of antioxidants and ultraviolet absorbers according to actual needs. Without introducing these additives, the product of the present invention can still maintain good appearance and color stability in a long-term heat-oxidative aging environment and ultraviolet radiation environment. Therefore, if there is no expansion requirement for the performance of the product, or the preparation cost needs to be considered, those skilled in the art may not introduce antioxidants and ultraviolet absorbers.

[0050] More preferably, the components of the black-blue phase polypropylene composite material may also include but are not limited to antistatic agents, lubricants, flame retardants, etc. Based on the processing or actual use needs of the product by technicians in this field, other types of functional additives can be added without affecting the expected performance of the product. For example, the above-mentioned additives can improve the antistatic ability, processing ability and flame retardancy of the product without affecting the characteristic performance of the product. That is, the description of the components of the product in the technical solution of the present invention is not a limitation on its type.

[0051] Another object of the present invention is to provide a method for preparing the black-blue phase polypropylene composite material, comprising the following steps:

[0052] The components are added into a screw extruder for melt extrusion and granulation to obtain the black-blue phase polypropylene composite material.

[0053] Preferably, the temperature zones of the screw extruder are set to 80-120°C in zone 1, 180-200°C in zone 2, 180-200°C in zone 3, 180-200°C in zone 4, 180-200°C in zone 5, 200-230°C in zone 6, 200-230°C in zone 7, 200-230°C in zone 8, 200-230°C in zone 9, 200-230°C in zone 10, 200-230°C in zone 11, and 200-230°C in zone 12, the screw speed is 280-450rpm, and the aspect ratio is (45-50):1.

[0054] Another object of the present invention is to provide application of the black-blue phase polypropylene composite material in the preparation of automotive interior parts.

[0055] Preferably, the automobile interior parts include door panels, pillars, dashboards and luggage boxes.

[0056] The black-blue phase polypropylene composite material of the present invention has a black-blue color system specially matched with automobile interior parts, and the appearance color system has high stability, can withstand long-term thermal oxygen aging and ultraviolet radiation environment, has a small degree of color difference change, and has a good appearance. No additional antioxidant or anti-ultraviolet additive is required to be introduced during the production process, and the use cost is low.

[0057] The beneficial effect of the present invention is that the present invention provides a black-blue phase polypropylene composite material, which introduces a low-refractive index silane coupling agent and a hyperbranched polyester into a polypropylene resin matrix for modifying a black-blue phase colorant, and is matched with a fine-scale filler, so that the product can achieve high heat-oxidative aging resistance and anti-ultraviolet light effects without introducing special additives or excessive additives, and has high appearance stability. DETAILED DESCRIPTION

[0058] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments and comparative examples, the purpose of which is to understand the content of the present invention in detail, rather than to limit the present invention. All other embodiments obtained by those of ordinary skill in the art without making creative work premise belong to the protection scope of the present invention. The experimental reagents and instruments involved in the implementation of the present invention, unless otherwise specified, are all commonly used common reagents and instruments.

[0059] Examples 1 to 14

[0060] An embodiment of a black-blue phase polypropylene composite material and a preparation method thereof according to the present invention, the components of the black-blue phase polypropylene composite material are shown in Table 1.

[0061] The preparation method of the black-blue phase polypropylene composite material comprises the following steps:

[0062] The components are mixed uniformly, and then melt-extruded and granulated in a twin-screw extruder to obtain the black-blue polypropylene composite material.

[0063] When the components are melt-extruded, the temperature zones of the twin-screw extruder are set to 100°C in zone 1, 150°C in zone 2, 150°C in zone 3, 180°C in zone 4, 200°C in zone 5, 200°C in zone 6, 200°C in zone 7, 200°C in zone 8, 210°C in zone 9, 220°C in zone 10, 220°C in zone 11, and 230°C in zone 12, the screw speed is 350rpm, and the aspect ratio is 48:1.

[0064] Comparative Examples 1 to 7

[0065] The difference between the comparative examples and the embodiments is only in the types and proportions of components, as shown in Table 2.

[0066] Among the components described in each embodiment and comparative example,

[0067] The polypropylene resin 1 is PP K7227H produced by Ningbo Formosa Chemical Industry Co., Ltd., and has a melt flow rate of 25 g / 10 min at 230° C. and a load of 2.16 kg;

[0068] The polypropylene resin 2 is EP548R produced by CNOOC and Shell, and has a melt flow rate of 23 g / 10 min at 230° C. and a load of 2.16 kg;

[0069] The filler 1 is 3000 mesh talc powder TYT-777A produced by Haicheng Tianyuan Chemical Co., Ltd.;

[0070] The filler 2 is 3000 mesh talc powder E05L produced by Aihai;

[0071] The filler 3 is 2000 mesh talcum powder TY90-7-C produced by Dongguan Sanzhi New Materials Co., Ltd.;

[0072] The toughening agent is POE DF640 produced by Mitsui Chemicals, ethylene-octene copolymer;

[0073] The antioxidant is a commercially available hindered phenol antioxidant 1010;

[0074] The ultraviolet light absorber is a commercially available hindered amine ultraviolet light absorber UV-3808PP5;

[0075] The black pigment is carbon black M717 produced by Cabot;

[0076] The blue pigment is Phthalocyanine Blue BF1535 produced by Shenlanhua, CAS No.: 147-14-8;

[0077] The hyperbranched polyester 1 is Hyper C100 produced by Wuhan Hyperbranching, an aromatic hyperbranched polyester;

[0078] The hyperbranched polyester 2 is Hyper C181 produced by Wuhan Hyperbranching, an aromatic hyperbranched polyester;

[0079] The hyperbranched polyester 3 is HBP158 produced by Wuhan Hyperbranching, an aliphatic hyperbranched polyester;

[0080] The hyperbranched polyester 4 is HBP160 produced by Wuhan Hyperbranching, an aliphatic hyperbranched polyester;

[0081] The siloxane 1 is 3-aminopropyltrimethoxysilane produced by Shandong Sodium Magnesium New Materials Co., Ltd., and its refractive index at 25° C. is 1.4320;

[0082] The siloxane 2 is γ-aminopropyltriethoxysilane produced by Hubei Jianghan New Materials Co., Ltd., and its refractive index at 25°C is 1.4195;

[0083] The siloxane 3 is vinyl triethoxysilane produced by Hangzhou Jessica Chemical Co., Ltd., and its refractive index at 25°C is 1.3960;

[0084] The siloxane 4 is tridecafluorooctyltriethoxysilane produced by Jiangsu Wannapu, and its refractive index at 25°C is 1.3460;

[0085] Unless otherwise specified, the components and raw materials used in the embodiments and comparative examples of the present invention are all commercially available raw materials, and the components and raw materials used in each parallel experiment are all of the same kind.

[0086] Table 1

[0087]

[0088]

[0089] Table 2

[0090]

[0091] In order to verify the performance of the black-blue phase polypropylene composite material of the present invention, the products prepared in each embodiment and comparative example were subjected to the following performance tests, and the specific steps are as follows:

[0092] (1) Anti-ultraviolet performance test: Referring to ASTMG154, each product was injection molded into a 100*100*3mm test specimen, and then tested under UVA-340 (340nm) spectrum, 1.55W / m 2 / nm, UV irradiation exposure for 8h under black standard temperature of 60℃ (±3℃); then no irradiation, natural cooling and water spraying for 0.25h; continue to irradiate and expose for 3.75h under black standard temperature of 50℃ (±3℃), take out the color plate for cooling after 400 hours of cycle testing, and use X-rite Color-Eye Ci7800 desktop colorimeter to measure the DL, Da, Db and DE values ​​of the sample before and after the test; take 5 samples for each embodiment or comparative example for testing, and take the average value of the results; the larger the DL, Da, Db and DE values ​​of the sample, the worse the anti-ultraviolet performance of the product;

[0093] (2) Thermal oxidation resistance test: Referring to GB-T 7141-2008, each product was injection molded into a 100*100*3 mm test sample, and then placed in an air atmosphere at 150°C for 750 hours. After the color plate was taken out and cooled, the DL, Da, Db, and DE values ​​of the sample before and after the test were measured using an X-rite Color-Eye Ci7800 desktop colorimeter; 5 samples were taken for each embodiment or comparative example for testing, and the results were averaged; the larger the DE value of the sample, the worse the anti-ultraviolet performance of the product;

[0094] (3) Appearance test: After the UV or heat aging test, let the color plate cool down and observe whether there is any powdering or precipitation on the surface of the sample.

[0095] The test results are shown in Tables 3 and 4.

[0096] Table 3

[0097]

[0098] Table 4

[0099]

[0100] As can be seen from Table 3 and Table 4, the black-blue phase polypropylene composite material of the present invention has ideal anti-ultraviolet light and heat-oxidation aging effects. After ultraviolet radiation, the color difference of the product is maintained at a low level (DE≤0.70), and after thermal oxidation treatment, the color difference of the product is maintained at a low level (DE≤0.65), and the product appearance is good, without obvious powdering or precipitation. The reason why the product can achieve the above-mentioned ideal effect is mainly because the coloring component in the product is a conventional product that has not been treated in any way compared to the product in Comparative Example 1. The color material is based on the modification of high-refractive-index siloxane and hyperbranched polyester in the component, so it can be stably dispersed in the polypropylene resin, and the probability of oxidation caused by external light and heat factors is significantly reduced, while the product in Comparative Example 1 has obvious yellowing after ultraviolet radiation and thermal oxidation, and even the product has powdering on the surface after treatment. At the same time, even if the amount of conventional additives such as antioxidants in the product is further increased, the improvement of product performance is not obvious, as shown in Comparative Example 7.

[0101] It can be seen from Example 1, Examples 9 to 11 and Comparative Examples 3 to 5 that the types of siloxane and hyperbranched polyester in the components cannot be selected arbitrarily. If the refractive index of the selected siloxane is insufficient, or the type of hyperbranched polyester is inappropriate, the colorant cannot be effectively protected and constructed, and the product still cannot guarantee a low color stability after treatment, and even has appearance problems.

[0102] In addition to the modification of the colorant, the filler in the components of the product of the present invention also needs to be matched accordingly. As can be seen from Example 1, Example 8 and Comparative Example 2, when the retained size of the filler in the product is too large, it is not only not conducive to the dispersion of the colorant, but may also have a negative impact on the protective effect of the colorant. The product's anti-ultraviolet absorption and heat-oxidation aging resistance are weakened and cannot reach the level of the example products.

[0103] However, in the product of the present invention, the colorant and compounding ingredients used as the colorant cannot be introduced too much, otherwise the system cannot guarantee the dispersion stability of the colorant. As described in Comparative Example 6, if there is too much colorant, the product will have poor color stability and precipitation will occur on the surface.

[0104] According to Example 1 and Examples 12 to 14, it can be seen that in the colorant, the proportion of silicone and hyperbranched polyester as modified components will directly affect the appearance stability of the product. When the ratio of the two is preferably in the range of 1: (1 to 1.5), the color difference value of the product after ultraviolet radiation and thermal oxygen aging treatment is smaller, and the appearance stability is better.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A black-blue phase polypropylene composite material, characterized in that: The composition comprises the following components in parts by weight: 60-80 parts of polypropylene resin, 10-20 parts of filler, 1.5-3.5 parts of colorant, 0.5-2.5 parts of hyperbranched polyester, and 0.5-2.5 parts of siloxane; The retained average particle size of the filler is ≤5 μm; The refractive index of the siloxane at 25° C. is ≥1.38, and the hyperbranched polyester is an aromatic hyperbranched polyester.

2. The black-blue phase polypropylene composite material according to claim 1, characterized in that: The filler includes at least one of talc powder, calcium carbonate, silicon dioxide and mica powder.

3. The black-blue phase polypropylene composite material as claimed in claim 2, characterized in that: The retained average particle size of the filler is 1 to 5 μm.

4. The black-blue phase polypropylene composite material according to claim 1, characterized in that: The black-blue colorant includes a black colorant and a blue colorant; the mass ratio of the black colorant to the blue colorant is 1:(0.2-0.3).

5. The black-blue phase polypropylene composite material according to claim 1, characterized in that: The siloxane has a refractive index of 1.39 to 1.46 at 25°C.

6. The black-blue phase polypropylene composite material as claimed in claim 5, characterized in that: The siloxane includes at least one of vinyl triethoxysilane, γ-aminopropyl triethoxysilane, and 3-aminopropyl trimethoxysilane.

7. The black-blue phase polypropylene composite material according to claim 1, characterized in that: The mass ratio of the modified siloxane to the hyperbranched polyester in the colorant is 1:(0.1-2).

8. The black-blue phase polypropylene composite material according to claim 1, characterized in that: The components of the black-blue phase polypropylene composite material also include 5 to 15 parts of a toughening agent; preferably, the toughening agent includes at least one of ethylene-octene copolymer, ethylene-butene copolymer, and ethylene-butene block copolymer elastomer.

9. The method for preparing the black-blue phase polypropylene composite material according to any one of claims 1 to 8, characterized in that: The following steps are involved: The components are added into a screw extruder for melt extrusion and granulation to obtain the black-blue phase polypropylene composite material.

10. An automotive interior component, characterized in that: The invention comprises the black-blue phase polypropylene composite material as described in any one of claims 1 to 8.

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