PC / ABS alloy material, preparation method and application thereof

Abstract

The application provides a PC / ABS alloy material and a preparation method and application thereof. The PC / ABS alloy material comprises the following components in parts by weight: PC resin 54-76 parts, ABS resin 14-40 parts, anti-rust auxiliary agent 2-5 parts and matting agent 1-3 parts. The PC / ABS alloy material with ultra-low gloss and anti-rust performance and good mechanical properties is prepared through the composition design of the PC / ABS alloy material and the synergistic effect of the anti-rust auxiliary agent and the matting agent.

Description

Technical Field

[0001] This invention belongs to the technical field of PC / ABS alloy materials, specifically relating to a PC / ABS alloy material, its preparation method, and its application. Background Technology

[0002] In recent years, lightweighting has undoubtedly become a focus of new car development. To achieve lightweighting goals, besides optimizing structural and process design, most efforts revolve around material selection, with plastics replacing steel being a major development trend. Automotive lightweighting has a significant impact on energy conservation and emission reduction. For traditional gasoline vehicles, a 10% reduction in weight can save 5% on fuel, reducing both fuel consumption and exhaust emissions, ultimately reducing environmental pollution. The demand for lightweighting is even more urgent for new energy vehicles. Studies have shown that a 10kg reduction in the overall weight of a pure electric vehicle can increase its driving range by 2.5km. Therefore, looking at the materials used in modern cars, plastic components are ubiquitous, appearing everywhere from exterior and interior trim to functional and structural parts.

[0003] PC / ABS alloy material combines the excellent properties of both materials, improving upon the shortcomings of PC and ABS individually. Compared to pure PC, PC / ABS alloy has improved fluidity, better processing performance, and reduced stress sensitivity in finished products. Compared to pure ABS, PC / ABS exhibits significantly improved mechanical properties, heat resistance, and flame retardant properties, thus it is widely used in automotive interior trim components, such as pillars, door panel trim, center trim, armrests, dashboard trim, secondary dashboard trim, cup holders, etc. As automotive interior trim components, to avoid strong light reflection that could irritate drivers and pose a safety hazard, interior materials typically require a low-gloss or matte finish. There are currently three common methods to reduce the gloss of interior parts: (1) spraying matte paint, but it is not only costly but also pollutes the environment and is not environmentally friendly; (2) changing the surface texture of interior parts, i.e. using leather texture treatment, but sometimes the gloss of the selected material itself is too high, and the gloss of the leather texture treatment still cannot achieve a satisfactory gloss, which limits its application; (3) directly selecting low gloss resin for injection molding, which has the advantages of low cost and green environmental protection, but requires high gloss of the material itself.

[0004] As an important raw material for automotive interior parts, PC / ABS alloy materials require advanced technology. Developing low-gloss PC / ABS alloy materials is therefore essential to further enhance their application in automotive interior components. Currently, low-gloss PC / ABS alloy materials typically achieve their desired low-gloss effect by adding matting agents. Inorganic matting agents, such as titanium dioxide, silicate fillers, and organic matting agents, require large quantities to achieve the desired low-gloss effect, which significantly impacts the material's performance.

[0005] With the explosive growth of new energy vehicles in recent years, engine noise in the cabin environment has become increasingly lower. Any abnormal noises in the interior are now more noticeable, causing discomfort for drivers and passengers. This discomfort can even affect the driver's attention, potentially leading to traffic accidents. Abnormal noises can occur in automotive interior components such as door panels, armrests, pillars, dashboards, and seat belts due to insecure installation or looseness. Traditional methods to address these noises involve attaching felt or applying lubricant to clips or guide rails; however, these methods complicate the manufacturing process and increase costs.

[0006] Therefore, it is of great significance to develop a PC / ABS alloy material that combines ultra-low gloss and noise reduction properties. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide a PC / ABS alloy material, its preparation method, and its applications. This invention designs the composition of the PC / ABS alloy material and, through the synergistic effect of anti-noise additives and matting agents, prepares a PC / ABS alloy material that combines ultra-low gloss and anti-noise properties with good mechanical properties.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] In a first aspect, the present invention provides a PC / ABS alloy material, the PC / ABS alloy material comprising the following components in parts by weight:

[0010]

[0011] The noise reduction additive is glycidyl methacrylate grafted polystyrene-ethylene-butadiene-styrene (glycidyl methacrylate grafted SEBS);

[0012] The matting agent is a cross-linked styrene-acrylonitrile copolymer (cross-linked SAN).

[0013] In this invention, by designing the composition of PC / ABS alloy material and further using specific anti-noise additives, and through the synergistic effect of anti-noise additives and matting agents, a PC / ABS alloy material with both ultra-low gloss and anti-noise properties, as well as good mechanical properties, can be prepared while reducing the amount of matting agent used.

[0014] In this invention, the anti-noise additive can improve the compatibility of PC / ABS and enhance the toughness of the material, while also producing a matte finish.

[0015] In this invention, by introducing the anti-noise additive glycidyl methacrylate grafted onto polystyrene-ethylene-butadiene-styrene, two advantages are achieved. First, the glycidyl methacrylate structure can react with the terminal hydroxyl groups of PC resin, and the styrene-ethylene-butadiene-styrene structure is partially compatible with the acrylonitrile-styrene portion of ABS resin. This improves the compatibility of PC / ABS and enhances the toughness of the material. Furthermore, the solubility parameters of the styrene-ethylene-butadiene-styrene structure differ significantly from those of the ABS powder in ABS resin, leading to phase separation during injection molding. This separation easily forms numerous tiny pits or grooves on the surface, causing a change in the direction of light reflection when incident light reaches the micro-roughened surface, resulting in diffuse reflection and a matting effect. This partially reduces the content of matting agents, thereby mitigating the impact of excessive matting agent content on the material's toughness. Second, the anti-noise additive effectively improves the damping properties of the product, reducing the vibration amplitude caused by frictional contact, thus achieving the anti-noise effect. Based on this, a matting agent (such as a cross-linked polystyrene polymer) is introduced to create a textured surface on the product. This can reduce the gloss of the material and reduce the stickiness of the material surface, thereby improving the anti-squeaking effect.

[0016] In this invention, a PC / ABS alloy material with excellent comprehensive performance was prepared by designing the dosage of the anti-noise additive. If the dosage of the anti-noise additive is too small, the prepared PC / ABS alloy material will have poor mechanical properties, high gloss, and poor anti-noise performance; if the dosage of the anti-noise additive is too large, the prepared PC / ABS alloy material will have low heat resistance and high gloss.

[0017] In this invention, the weight percentage of PC resin in the PC / ABS alloy material can be 54 parts, 55 parts, 56 parts, 58 parts, 60 parts, 62 parts, 64 parts, 66 parts, 68 parts, 70 parts, 72 parts, 74 parts, or 76 parts, etc.

[0018] In the PC / ABS alloy material, the weight parts of ABS resin can be 14, 15, 18, 20, 22, 25, 27, 33, 36, 38, or 40 parts, etc.

[0019] In the PC / ABS alloy material, the weight percentage of the anti-noise additive can be 2 parts, 2.2 parts, 2.4 parts, 2.5 parts, 2.7 parts, 3 parts, 3.3 parts, 3.6 parts, 3.8 parts, 4.1 parts, 4.4 parts, 4.6 parts, 4.8 parts, or 5 parts, etc.

[0020] In the PC / ABS alloy material, the weight parts of the matting agent can be 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, 2.2 parts, 2.4 parts, 2.6 parts, 2.8 parts, or 3 parts, etc.

[0021] In this invention, the mass percentage of the sum of all components of the PC / ABS alloy material is 100%, and the mass percentage of the PC resin is 55-78%, for example, it can be 55%, 60%, 65%, 70%, 72%, 75% or 78%, etc.

[0022] In this invention, PC resin is polycarbonate resin, and ABS resin is acrylonitrile-butadiene-styrene copolymer resin.

[0023] The following are preferred technical solutions of the present invention, but are not intended to limit the technical solutions provided by the present invention. The purpose and beneficial effects of the present invention can be better achieved and realized through the following preferred technical solutions.

[0024] As a preferred embodiment of the present invention, the melt flow rate of the PC resin at 300°C and 1.2 kg is 10-20 g / 10 min, for example, it can be 10 g / 10 min, 11 g / 10 min, 12 g / 10 min, 13 g / 10 min, 14 g / 10 min, 15 g / 10 min, 16 g / 10 min, 17 g / 10 min, 18 g / 10 min, 19 g / 10 min or 20 g / 10 min, etc.

[0025] This invention enables the preparation of high-performance PC / ABS alloy materials by controlling the melt flow rate (MI) of PC resin within a specific range at 300°C and 1.2 kg. If the melt flow rate of the PC resin is too low, it will adversely affect the subsequent processing performance of the PC / ABS alloy material; if the melt flow rate of the PC resin is too high, it will lead to poor heat processing stability of the PC / ABS alloy material.

[0026] In this invention, the melt flow rate of the PC resin at 300°C and 1.2 kg was tested according to ISO 1133-2012 standard.

[0027] As a preferred embodiment of the present invention, the melt flow rate of the ABS resin at 220°C and 10 kg is ≤15 g / 10 min, for example, it can be 3 g / 10 min, 5 g / 10 min, 8 g / 10 min, 9 g / 10 min, 10 g / 10 min, 11 g / 10 min, 12 g / 10 min, 13 g / 10 min, 14 g / 10 min or 15 g / 10 min, etc., preferably 3-15 g / 10 min.

[0028] This invention enables the preparation of high-performance PC / ABS alloy materials by controlling the melt flow rate (MI) of ABS resin within a specific range at 220°C and 10 kg. If the melt flow rate of the ABS resin is too high, it will lead to increased gloss and decreased impact toughness in the PC / ABS alloy material.

[0029] In this invention, the melt flow rate of the ABS resin at 220°C and 10kg was tested according to ISO 1133-2012 standard.

[0030] As a preferred embodiment of the present invention, the glycidyl methacrylate grafting rate of glycidyl methacrylate in polystyrene-ethylene-butadiene-styrene is 0.5-1.5 wt%, for example, it can be 0.5 wt%, 0.6 wt%, 0.7 wt%, 0.8 wt%, 0.9 wt%, 1.0 wt%, 1.1 wt%, 1.2 wt%, 1.3 wt%, 1.4 wt%, or 1.5 wt%, etc.

[0031] In this invention, the method for calculating the grafting rate of glycidyl methacrylate onto polystyrene-ethylene-butadiene-styrene is as follows: A certain mass of glycidyl methacrylate-grafted polystyrene-ethylene-butadiene-styrene is weighed and added to 50 mL of xylene. 15 mL of 0.05 mol / L isopropanol hydrochloride standard solution is added, and the mixture is heated under reflux for 2 h. Then, 2-3 drops of phenolphthalein ethanol solution are added, and the mixture is titrated with 0.05 mol / L NaOH-methanol standard solution. The volume of NaOH-methanol standard solution consumed is recorded, and the grafting rate (GD) is calculated. The calculation formula is shown below:

[0032]

[0033] Where: c is the concentration of the NaOH-methanol standard solution, mol / L; V0 is the volume of NaOH-methanol standard solution consumed in the titration of the blank sample, mL; V is the volume of NaOH-methanol standard solution consumed in the titration of the sample, mL; 142.15 is the molar mass of glycidyl methacrylate, g / mol; m is the mass of glycidyl methacrylate grafted onto polystyrene-ethylene-butadiene-styrene, g.

[0034] In this invention, by controlling the grafting rate of glycidyl methacrylate in polystyrene-ethylene-butadiene-styrene-grafted polystyrene-ethylene-butadiene-styrene within a specific range, high-performance PC / ABS alloy materials can be prepared. If the grafting rate of glycidyl methacrylate is too low, the compatibility function of this anti-noise additive in the alloy material system is not significant, resulting in poor toughness of the PC / ABS alloy material; if the content of glycidyl methacrylate is too high, the compatibility function of this anti-noise additive in the alloy material system is too large, resulting in poor phase separation during the injection molding process of the PC / ABS alloy material, thus affecting the purpose of reducing the gloss of the PC / ABS alloy material.

[0035] In this invention, glycidyl methacrylate-grafted polystyrene-ethylene-butadiene-styrene is prepared by the following method, which includes the following steps:

[0036] (1) Dissolve dicumyl peroxide (0.3-0.8g) in glycidyl methacrylate (3-10g). After complete dissolution, mix it with SEBS (80-100g) and add it to a twin-screw extruder for melt grafting reaction. After cooling, the extruded strip is granulated. The temperature of the feeding section is 195-210℃, the temperature of the plasticizing section is 210-225℃, the temperature of the homogenizing section is 225-240℃, and the screw speed is 300rpm.

[0037] (2) Then the grafted product and toluene (1000-1500 mL) were added to a heating and dissolving apparatus, refluxed at 110°C for 2 h, cooled to room temperature, precipitated, filtered, and an appropriate amount of isopropanol was added to the precipitate and filtered 2-3 times. The obtained product was placed in an oven and dried for at least 2 h to obtain the glycidyl methacrylate grafted polystyrene-ethylene-butadiene-styrene.

[0038] Preferably, the cross-linked styrene-acrylonitrile copolymer has a particle size ≤25 mesh, for example, it can be 5 mesh, 6 mesh, 7 mesh, 8 mesh, 9 mesh, 10 mesh, 11 mesh, 12 mesh, 13 mesh, 14 mesh, 15 mesh, 16 mesh, 17 mesh, 18 mesh, 19 mesh, 20 mesh, 21 mesh, 22 mesh, 23 mesh, 24 mesh or 25 mesh, preferably 5 mesh-25 mesh.

[0039] In this invention, the crosslinked styrene-acrylonitrile copolymer includes, but is not limited to, BMAT purchased from SABIC.

[0040] As a preferred embodiment of the present invention, the PC / ABS alloy material further includes 0.5-2 parts by weight of processing aids, such as 0.5 parts by weight, 0.6 parts by weight, 0.7 parts by weight, 0.8 parts by weight, 0.9 parts by weight, 1 part by weight, 1.1 parts by weight, 1.2 parts by weight, 1.3 parts by weight, 1.4 parts by weight, 1.5 parts by weight, 1.6 parts by weight, 1.7 parts by weight, 1.8 parts by weight, 1.9 parts by weight, or 2 parts by weight.

[0041] Preferably, the processing aid includes any one or a combination of at least two of antioxidants, light stabilizers, or lubricants.

[0042] It should be noted that the present invention does not impose any special restrictions on the specific selection of antioxidants, light stabilizers, and lubricants, and commonly used antioxidants, light stabilizers, and lubricants in the art are all applicable.

[0043] As a preferred embodiment of the present invention, the PC / ABS alloy material further includes 0.5-2 parts by weight of black masterbatch, for example, 0.5 parts by weight, 0.6 parts by weight, 0.7 parts by weight, 0.8 parts by weight, 0.9 parts by weight, 1 part by weight, 1.1 parts by weight, 1.2 parts by weight, 1.3 parts by weight, 1.4 parts by weight, 1.5 parts by weight, 1.6 parts by weight, 1.7 parts by weight, 1.8 parts by weight, 1.9 parts by weight, or 2 parts by weight.

[0044] Preferably, the black masterbatch comprises carbon black-loaded SAN masterbatch.

[0045] Preferably, the carbon black loading of the carbon black-loaded SAN masterbatch is 30-40 wt%, for example, it can be 30 wt%, 31 wt%, 32 wt%, 33 wt%, 34 wt%, 35 wt%, 36 wt%, 37 wt%, 38 wt%, 39 wt%, or 40 wt%, etc.

[0046] In a second aspect, the present invention provides a method for preparing a PC / ABS alloy material as described in the first aspect, the method comprising the following steps:

[0047] The components of the PC / ABS alloy material are mixed, melt-extruded, and granulated to obtain the PC / ABS alloy material.

[0048] As a preferred embodiment of the present invention, the mixing method includes mixing using a high-speed mixer.

[0049] Preferably, the mixing time is 3-5 minutes, for example, 3 minutes, 3.5 minutes, 4 minutes, 4.5 minutes or 5 minutes.

[0050] As a preferred embodiment of the present invention, the melt extrusion method includes melt extrusion granulation using a twin-screw extruder, wherein the process parameters for melt extrusion are: a feed section temperature of 180-200℃ (e.g., 180℃, 182℃, 184℃, 186℃, 188℃, 190℃, 192℃, 194℃, 196℃, 198℃, or 200℃, etc.), and a plasticizing section temperature of 210-230℃ (e.g., 210℃, 212℃, 214℃, 216℃, 218℃, 220℃, 222℃, 224℃, 226℃). The homogenization zone temperature is 240-260℃ (e.g., 240℃, 242℃, 244℃, 246℃, 248℃, 250℃, 252℃, 254℃, 256℃, 258℃, or 260℃, etc.), and the screw speed is 300-600rpm (e.g., 300rpm, 330rpm, 360rpm, 380rpm, 400rpm, 420rpm, 460rpm, 500rpm, 520rpm, 550rpm, 570rpm, or 600rpm, etc.).

[0051] Thirdly, the present invention provides an application of the PC / ABS alloy material as described in the first aspect, wherein the PC / ABS alloy material is used to manufacture interior trim parts for automobiles.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] (1) By designing the composition of PC / ABS alloy material, and further through the synergistic effect of specific anti-noise additives and matting agents, this invention prepares PC / ABS alloy material that has both ultra-low gloss and anti-noise properties, as well as good mechanical properties, making it suitable for manufacturing automotive interior trim parts.

[0054] (2) This invention further improves the comprehensive performance of PC / ABS alloy materials by grafting glycidyl methacrylate with polystyrene-ethylene-butadiene-styrene and cross-linked styrene-acrylonitrile copolymer at a specific grafting rate and controlling the melt flow rate of PC resin at 300℃ and 1.2kg and the melt flow rate of ABS resin at 220℃ and 10kg within a specific range. This results in a notched impact strength of simply supported beam ≥60J, specifically 60~78J, heat distortion temperature >95℃, specifically 99~108℃, melt flow rate of 13~26g / 10min, gloss ≤3.1GU, specifically 2.4~3.1GU, and noise resistance of level 1 or 2. Detailed Implementation

[0055] To facilitate understanding of the present invention, the following embodiments are provided. Those skilled in the art should understand that these embodiments are merely illustrative and should not be construed as limiting the scope of the invention.

[0056] The sources of some components in the examples and comparative examples are shown in Table 1 below:

[0057] Table 1

[0058]

[0059]

[0060] The preparation method of the noise reduction additive is as follows:

[0061] (1) Dissolve dicumyl peroxide (0.5g) in glycidyl methacrylate. After complete dissolution, mix it with SEBS (100g) and add it to a twin-screw extruder for melt grafting reaction. After cooling, the extruded strip is granulated. The temperature of the feeding section is 195-210℃, the temperature of the plasticizing section is 210-225℃, the temperature of the homogenizing section is 225-240℃, and the screw speed is 300rpm.

[0062] (2) Then the grafted product and toluene (1200 mL) were added to a heating and dissolving apparatus, refluxed at 110 °C for 2 h, cooled to room temperature, precipitated, filtered, and an appropriate amount of isopropanol was added to the precipitate and filtered 2-3 times. The obtained product was placed in an oven and dried for at least 2 h to obtain the noise-reducing additive.

[0063] Among them, other anti-noise additives with corresponding grafting rates, such as GMA-g-SEBS, can be obtained by adjusting the amount of GMA used. The grafting rates are shown in Table 1 above.

[0064] Examples 1-17, Comparative Examples 1-4

[0065] Examples 1-17 and Comparative Examples 1-4 each provide a PC / ABS alloy material. The composition of the PC / ABS alloy material and the amount of each component are shown in Tables 2-4 below (the amounts of each component in Tables 2-4 are parts by weight).

[0066] The preparation method of the above PC / ABS alloy material is as follows:

[0067] The components of the PC / ABS alloy material are added to a high-speed mixer and mixed for 5 minutes to obtain a mixture. The mixture is then fed into a twin-screw extruder through the main feed port. After melt extrusion, the mixture is granulated to obtain the target PC / ABS alloy material.

[0068] The process parameters for melt extrusion are as follows: feed section temperature is 200℃, plasticizing section temperature is 230℃, homogenizing section temperature is 250℃, and screw speed is 500rpm.

[0069] The properties of the PC / ABS alloy materials provided in the above embodiments and comparative examples were tested, and the specific test methods are as follows:

[0070] (1) Notched impact strength of simply supported beam: According to ISO-179-1:2010 standard, each product was injection molded into a 80mm×10mm×4mm strip, and the impact energy after notching was 4J.

[0071] (2) Heat distortion temperature: Tested according to ISO-75-2:2013 standard, the test conditions are 1.8MPa, 120℃ / min;

[0072] (3) Melt flow rate: Tested according to ISO 1133-1-2011 standard, test conditions: 260℃ / 5kg;

[0073] (4) Tensile strength: Each product was injection molded into 1A specimens according to ISO 527-2-2012 standard, and the tensile test was conducted at a speed of 50 mm / min;

[0074] (5) Gloss: The surface gloss of the injection-molded 3mm thick Volkswagen K31 leather-textured color plate was tested at 60° using the Garden Gloss Meter according to ASTM D523, and recorded in gloss units (GU).

[0075] (6) Noise prevention: Tested according to standard VDA230-206-2005. The test conditions are 40N and speed 4mm / s. Record the RPN value of each product. The RPN is divided into 1 to 10 levels. RPN = 1 to 3 is judged as noise prevention; RPN = 4 to 6 is judged as medium noise; RPN = 7 to 10 is judged as high noise.

[0076] The performance test results are shown in Tables 2-4 below:

[0077] Table 2

[0078]

[0079] Table 3

[0080]

[0081]

[0082] Table 4

[0083]

[0084] This invention designs the composition of PC / ABS alloy materials and, through the synergistic effect of specific anti-noise additives and matting agents, prepares PC / ABS alloy materials that possess both ultra-low gloss and anti-noise properties, while also exhibiting good mechanical properties. These properties include a notched impact strength of >50J (specifically 52–78J), a heat distortion temperature >95℃ (specifically 97–108℃), a melt flow rate of 8–26 g / 10 min, a tensile strength of 49–55 MPa, a gloss level ≤3.5 GU (specifically 2.4–3.5 GU), and an anti-noise performance of level 1 or 2.

[0085] As can be seen from Examples 1 and 5-11, this application can further improve the PC / ABS alloy material by controlling the melt flow rate of PC resin at 300℃ and 1.2kg and the melt flow rate of ABS resin at 220℃ and 10kg within a specific range. The material has a notched impact strength of ≥60J, specifically 60~78J, a heat distortion temperature of >95℃, specifically 99~108℃, a melt flow rate of 13~26g / 10min, a gloss of ≤3.1GU, specifically 2.4~3.1GU, and a noise resistance of level 1 or 2.

[0086] As can be seen from Examples 1 and 12-17, and Comparative Examples 1-3, this application uses glycidyl methacrylate grafted with polystyrene-ethylene-butadiene-styrene with a specific grafting rate as an anti-noise additive, and controls its dosage within a specific range, which can further improve the comprehensive performance of PC / ABS alloy materials.

[0087] As can be seen from Example 1 and Comparative Examples 4-5, the present invention prepares a PC / ABS alloy material with both ultra-low gloss and anti-noise properties, as well as good mechanical properties, through the synergistic effect of anti-noise additives and matting agents.

[0088] In summary, this invention, through the design of the composition of PC / ABS alloy material and the synergistic effect of specific anti-noise additives and matting agents, has prepared a PC / ABS alloy material that combines ultra-low gloss and anti-noise performance with good mechanical properties, making it suitable for manufacturing automotive interior trim parts.

[0089] The applicant declares that the detailed process flow of this invention is illustrated by the above embodiments, but this invention is not limited to the above detailed process flow, that is, it does not mean that this invention must rely on the above detailed process flow to be implemented. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of raw materials for the product of this invention, addition of auxiliary components, and selection of specific methods, etc., all fall within the protection scope and disclosure scope of this invention.

Claims

1. A PC / ABS alloy material, characterized in that, The PC / ABS alloy material comprises the following components in parts by weight: 54-76 parts of PC resin; 14-40 parts of ABS resin; 2-5 parts of anti-noise additive; 1-3 parts matting agent; The noise reduction additive is glycidyl methacrylate grafted polystyrene-ethylene-butadiene-styrene; The matting agent is a cross-linked styrene-acrylonitrile copolymer; The melt flow rate of the ABS resin at 220°C and 10 kg is ≤15 g / 10 min; The glycidyl methacrylate grafting rate of glycidyl methacrylate in the polystyrene-ethylene-butadiene-styrene graft is 0.5-1.5 wt%.

2. The PC / ABS alloy material according to claim 1, characterized in that, The PC resin has a melt flow rate of 10-20 g / 10min at 300℃ and 1.2 kg.

3. The PC / ABS alloy material according to claim 1, characterized in that, The cross-linked styrene-acrylonitrile copolymer has a particle size ≤25 mesh.

4. The PC / ABS alloy material according to claim 1, characterized in that, The PC / ABS alloy material also includes 0.5-2 parts by weight of processing aids.

5. The PC / ABS alloy material according to claim 4, characterized in that, The processing aids include any one or a combination of at least two of antioxidants, light stabilizers, or lubricants.

6. The PC / ABS alloy material according to claim 1, characterized in that, The PC / ABS alloy material also includes 0.5-2 parts by weight of black masterbatch.

7. The PC / ABS alloy material according to claim 6, characterized in that, The black masterbatch includes carbon black-loaded SAN masterbatch.

8. The PC / ABS alloy material according to claim 7, characterized in that, The carbon black loading of the carbon black-loaded SAN masterbatch is 30-40 wt%.

9. A method for preparing the PC / ABS alloy material as described in any one of claims 1-8, characterized in that, The preparation method includes the following steps: The components of the PC / ABS alloy material are mixed, melt-extruded, and granulated to obtain the PC / ABS alloy material.

10. An application of the PC / ABS alloy material as described in any one of claims 1-8, characterized in that, The PC / ABS alloy material is used to manufacture automotive interior trim parts.

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