High-gloss heat-resistant ABS material and preparation method thereof

Abstract

The invention relates to the technical field of organic materials, and discloses a high-gloss heat-resistant ABS material and a preparation method thereof.The ABS material is prepared from, by weight, ABS resin, calcium silicate nanopowder, aluminum titanate, silicon nitride, aluminum nitride, epoxy resin, a brightening additive, an antioxidant, a heat stabilizer, an acrylate comonomer and a functional polymer; wherein the functional polymer is a polyurethane-olefin copolymer, a polyamide-polybenzothiadiazole and polyethylene. By selecting the filler, introducing the functional polymer and optimizing the processing technology, the excellent glossiness and high temperature resistance of the material are realized.

Description

Technical Field

[0001] This invention relates to the field of organic materials technology, and more specifically, to a high-gloss, heat-resistant ABS material and its preparation method. Background Technology

[0002] ABS (acrylonitrile-butadiene-styrene) material is widely used in various fields such as automobiles, electronics, electrical equipment, home appliances, and toys due to its good mechanical properties, ease of processing, and high molding precision. Especially in fields with high aesthetic requirements, ABS material is often chosen as the base material for injection molding. However, while traditional ABS material possesses good impact toughness and surface gloss, its stability under extreme environments such as high temperatures, long-term use, and ultraviolet radiation is poor. In particular, it is prone to heat deformation at high temperatures, and the material's gloss will decrease over time.

[0003] To improve the stability of ABS materials at high temperatures, engineers have employed various methods, such as using different heat-resistant additives, reinforcing fillers, and resin blends, to enhance the material's heat resistance. Common modification methods include adding fillers such as silicon nitride and aluminum nitride, as well as using blends of high-temperature epoxy resin and ABS resin. While these techniques can improve the material's heat resistance and mechanical properties to some extent, achieving a balance between high gloss and heat resistance remains challenging due to filler dispersion and resin matrix compatibility issues.

[0004] First, the addition of large amounts of high-temperature resistant fillers or modified resins to heat-resistant ABS materials often reduces their surface gloss. Even with the use of gloss additives, achieving a high gloss effect is difficult. Furthermore, despite the addition of high-temperature materials such as epoxy resin, traditional ABS materials still suffer from heat deformation and aging under high-temperature conditions, especially in automotive and home appliance environments, resulting in limited service life and stability. Second, the dispersibility and compatibility of high-temperature fillers are key factors affecting material performance. Common high-temperature resistant fillers such as silicon nitride and aluminum nitride have poor dispersibility, which can lead to filler agglomeration, thus affecting the material's mechanical properties and stability. Summary of the Invention

[0005] The purpose of this invention is to provide a high-gloss, heat-resistant ABS material and its preparation method to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following solution: A high-gloss, heat-resistant ABS material, comprising the following components by weight: 65-75 parts of ABS resin; 2-4 parts of calcium silicate nanopowder; 1-3 parts of aluminotitanium; 0.25-1 part silicon nitride; 0.25-1 part aluminum nitride; 7-15 parts epoxy resin; Brightening additive: 0.5-1.5 parts; Antioxidant 0.1-0.5 parts; Heat stabilizer 0.2-1 part; 0.5-3 parts of acrylate comonomer; And functional polymers; The functional polymer is 1-3 parts of polyurethane-olefin copolymer, 0.5-2 parts of polyamide-polybenzothiadiazole and 0.5-3 parts of polyethylene.

[0007] Furthermore, the brightening additive is one or more of fluorinated polyurethane, fluorinated acrylate, or fluorinated epoxy resin.

[0008] Furthermore, the antioxidant is tert-butylhydroquinone or a combination thereof with a phosphate ester.

[0009] Furthermore, the heat stabilizer includes one or more of zinc oxide, tin-based compounds, and calcium-zinc composite heat stabilizers.

[0010] On the other hand, the present invention also provides a method for preparing the above-mentioned high-gloss heat-resistant ABS material, comprising the following steps: Step 1: Mix calcium silicate nanopowder, aluminotitanium, silicon nitride, and aluminum nitride as fillers and soak them in a 5% sodium hydroxide solution; Step 2: Spray the filler surface with a 20% hydrogen fluoride solution for 20 minutes. After removal, ultrasonically clean it in ultrapure water and then dry it. Step 3: Mix the filler and ABS resin in the following proportions to obtain mixture A: 65-75 parts of ABS resin; 2-4 parts of calcium silicate nanopowder; 1-3 parts of aluminotitanium; 0.25-1 part silicon nitride; 0.25-1 part aluminum nitride; 7-15 parts epoxy resin; Brightening additive: 0.5-1.5 parts; Antioxidant 0.1-0.5 parts; Heat stabilizer 0.2-1 part; 0.5-3 parts of acrylate comonomer; Step 4: Add the polyurethane-olefin copolymer, polyamide-polybenzothiadiazole copolymer, and polyethylene to mixture A in the following proportions to obtain mixture B: 1-3 parts of polyurethane-olefin copolymer; 0.5-2 parts of polyamide-polybenzothiadiazole; Polyethylene 0.5-3 parts; The stirring temperature was set to 60℃, and the stirring time was 20 minutes. Step 5: Add mixture B to a twin-screw extruder for melt blending. Cool the extruded molten material and stretch and pelletize it during the cooling process to obtain granular material. Step 6: Coat the particulate material with a composite coating and cure it with ultraviolet light. The composite coating contains a brightening additive, an antioxidant, and a heat stabilizer. Step 7: Feed the granular material from Step 6 into the injection molding machine for final molding.

[0011] Further, in step 4, the polyurethane-olefin copolymer, polyamide-polybenzothiadiazole copolymer, polyethylene and mixture A are placed in a high-shear mixer at a speed of 3000-5000 rpm for 20-30 minutes.

[0012] Furthermore, in step 5, the cooling rate of the twin-screw extruder is 15-20°C.

[0013] Furthermore, in step 5, during the melt blending process, the temperatures are set as follows: hopper zone: 180℃, compression zone: 200℃, and mold zone: 210℃.

[0014] Furthermore, in step 8, the injection temperature is 220℃, the injection pressure is 80-120MPa, and the holding time is 10s.

[0015] Furthermore, the polyurethane-olefin copolymer has a molecular weight of 20,000-50,000, the polyamide-polybenzothiadiazole copolymer has a molecular weight of 10,000-30,000, and the polyethylene has a density of 0.92-0.96 g / cm3.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: High gloss is achieved through optimization of surface smoothness and microstructure. While traditional ABS materials possess good gloss, the addition of high-temperature resistant fillers often leads to a decrease in surface gloss due to surface inhomogeneity or mismatch of the fillers. This invention, through refined functional polymers and surface modification techniques, ensures a smooth and uniform surface of the material, avoiding the agglomeration and uneven dispersion problems of traditional fillers, thus improving the surface gloss. In particular, the use of hydrogen fluoride solution spraying and ultrasonic cleaning technology to treat the fillers enhances the bonding force between the fillers and the ABS resin matrix, allowing the final material to maintain high gloss even at high temperatures.

[0017] The improved heat resistance of this invention stems from the cross-linking structure of the selected functional fillers and resin. The selected fillers, such as calcium silicate nanopowder, aluminotitanate, silicon nitride, and aluminum nitride, possess low coefficients of thermal expansion and excellent thermal stability, effectively reducing thermal stress at high temperatures. The introduction of epoxy resin enhances the heat resistance of the resin matrix through a cross-linking reaction, enabling the material to maintain stable physical properties at high temperatures. Furthermore, the copolymerization of functional polymers such as polyurethane-olefin copolymers with polyamide-polybenzothiadiazole enhances the material's thermal stability. By improving the degree of cross-linking in the resin's molecular structure, it ensures that the material is not easily deformed or degraded at high temperatures, fundamentally improving its heat resistance.

[0018] This invention enhances the antioxidant properties of materials under high temperature and ultraviolet radiation by introducing antioxidants (such as tert-butylhydroquinone) and brightening additives (such as fluorinated polyurethane) in synergy. The antioxidants work by using a free radical scavenging mechanism to effectively prevent performance degradation caused by oxidation, especially preventing thermal aging and fading. Meanwhile, the brightening additives further improve surface gloss and UV resistance by altering the microstructure of the material surface, ensuring that the material does not discolor or age during long-term use, thereby extending its service life.

[0019] This invention improves the interfacial affinity between fillers and ABS resin by employing hydrogen fluoride solution spraying and ultrasonic cleaning techniques. Fillers (such as silicon nitride and aluminum nitride) often exhibit poor compatibility with the resin matrix due to differences in surface energy, leading to uneven dispersion and filler agglomeration, thus affecting the overall performance of the material. Through surface fluorination modification and ultrasonic cleaning, this invention ensures that the filler is uniformly distributed in the ABS resin, avoiding the performance degradation caused by uneven filler dispersion in traditional methods, and further improving the mechanical properties and thermal stability of the material.

[0020] This invention optimizes the thermal stability, impact resistance, chemical corrosion resistance, and abrasion resistance of materials at the molecular level by introducing specific functional polymers, such as polyurethane-olefin copolymers, polyamide-polybenzothiadiazole, and polyethylene. These functional polymers improve the thermal stability and chemical resistance of the materials by enhancing the crosslinking degree of the polymer chains, while also enhancing the materials' UV resistance and oxidation resistance. This makes them particularly suitable for applications requiring stable performance in harsh environments, such as automotive parts and exterior components for home appliances.

[0021] This invention utilizes high-shear stirring technology, twin-screw extruder melt blending technology, and precise control of a synchronous traction cooling system during processing to ensure uniform mixing and stable dispersion of all components. This refined processing not only avoids the performance inconsistencies caused by uneven filler dispersion or poor resin compatibility in traditional processes, but also ensures high stability and high gloss of the material during production. This allows the final product to maintain excellent gloss and mechanical properties even under extreme environments such as high temperature, high humidity, and ultraviolet radiation. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example 1

[0023] This embodiment provides a high-gloss, heat-resistant ABS material, which, by weight, comprises the following components: ABS resin (molecular weight 120,000-150,000): 70 parts; Calcium silicate nanopowder (CaSiO3): 3 parts; Aluminotitanium (AlTiO3): 2 parts; Silicon nitride (Si3N4): 0.5 parts; Aluminum nitride (AlN): 0.5 parts; Epoxy resin (bisphenol A type epoxy resin, with a molecular weight of 2500-3500 and an epoxy value of 0.50-0.55 mol / 100g): 10 parts; Brightening additive (fluorinated polyurethane, with a molecular weight of 30,000-50,000): 1 part; Antioxidant (tert-butylhydroquinone): 0.3 parts; Heat stabilizer (anhydrous zinc oxide, particle size 0.1-5μm): 0.5 parts; Acrylic ester comonomer (polymer of methyl acrylate and ethyl acrylate, molecular weight 1000-1500): 2 parts; Functional polymer: polyurethane-olefin copolymer (molecular weight 20,000-50,000): 2 parts; Polyamide-polybenzothiadiazole (PA-PBTZ, molecular weight 10000-30000): 1 part; Polyethylene (PE), molecular weight 100,000-150,000, density 0.92-0.96 g / cm³ 3 ): 2 copies.

[0024] Preparation method Filler surface treatment: First, calcium silicate nanoparticles, aluminotitanate, silicon nitride, and aluminum nitride were mixed in the above proportions and immersed in a 5% sodium hydroxide solution at 40°C for 30 minutes. This step removed impurities from the filler surface and improved its hydrophilicity. Then, a 20% hydrogen fluoride solution was sprayed onto the filler surface for 20 minutes to introduce fluorinated groups. After treatment, the filler was ultrasonically cleaned with ultrapure water for 10 minutes to ensure no impurities remained on the surface. The cleaned filler was then dried in an 80°C oven for 12 hours.

[0025] Mixing fillers and resins: The treated filler was mixed with ABS resin in a certain proportion to obtain mixture A. Mixture A was then placed in a high-shear mixer, and the mixing temperature was set to 60°C for 20 minutes.

[0026] Addition and stirring of functional polymers: Polyurethane-olefin copolymer, polyamide-polybenzothiadiazole copolymer, and polyethylene were added to mixture A according to the formulation ratio to obtain mixture B. Mixture B was then placed back into a high-shear mixer, with the speed set to 3000 rpm and the mixing time set to 30 minutes.

[0027] Melt blending and cooling: Mixture B is fed into a twin-screw extruder. The extruder's hopper zone temperature is 180℃, compression zone temperature is 200℃, die zone temperature is 210℃, screw speed is 250 rpm, and extrusion speed is 1.5-2.0 kg / h. The molten material is cooled by a synchronous traction system at a cooling rate of 15-20℃ / min until the temperature drops to 90℃. The cooled material is then cut into 3-5mm particles using a precision pelletizer.

[0028] Coating and Curing of Composite Coatings: The pellets are coated with a composite coating containing brightening additives, antioxidants, and heat stabilizers. The coating is applied evenly using spraying or dipping methods, with a thickness controlled at 2-5 μm. The coated pellets are then placed in a UV curing device with a UV intensity of 100-200 mW / cm². 2 The curing time is 20 minutes to ensure the coating cures evenly.

[0029] Final injection molding: The coated and cured granules are fed into an injection molding machine for final molding. The injection temperature is 220℃, the injection pressure is 80-120MPa, and the holding time is 10 seconds.

[0030] Comparative Example 1 The difference between this comparative example and Example 1 is that: This comparative example uses a physical mixing method to directly add fillers to the resin matrix without surface modification.

[0031] Preparation method: Filler mixing: Calcium silicate nanopowder (3 parts), aluminum titanate (2 parts), silicon nitride (0.5 parts) and aluminum nitride (0.5 parts) are directly added to ABS resin. The mixing ratio is 70 parts ABS resin.

[0032] Mixing: Put the above mixture into a high-shear mixer and mix. Set the mixing temperature to 50°C and the mixing time to 30 minutes to ensure that the filler is evenly dispersed in the resin matrix.

[0033] Add functional polymers: Add 2 parts of polyurethane-olefin copolymer and 2 parts of polyethylene and stir. Set the stirring temperature to 60°C and the stirring time to 20 minutes.

[0034] Melt blending: The mixed material is fed into a twin-screw extruder. The temperature of the hopper zone is set to 180℃, the temperature of the compression zone is 200℃, the temperature of the die zone is 210℃, the screw speed is 250rpm, and the extrusion speed is 1.5-2.0kg / h.

[0035] Cooling and pelletizing: The extruded material is cooled by a synchronous traction system at a rate of 15-20℃ / min. After cooling to 90℃, it is cut into 3-5mm pellets by a precision pelletizer.

[0036] Composite Coating and Curing: After applying the composite coating, a UV curing device is used with a UV intensity of 100-200 mW / cm². 2 The curing time is 20 minutes.

[0037] Injection molding: Finally, the coated and cured granules are fed into the injection molding machine. The injection temperature is set to 220℃, the injection pressure is 80-120MPa, and the holding time is 10 seconds.

[0038] Comparative Example 2 The difference between this comparative example and Example 1 is that: The comparative example used polytetrafluoroethylene and polyarylene as functional polymers, but this choice resulted in poor material flowability during processing, and the final product had low gloss due to the inhibitory effect of PTFE on gloss.

[0039] Preparation method: Selection of functional polymers: Add polytetrafluoroethylene (3 parts) and polyarylene (3 parts) to ABS resin in a ratio of 70 parts ABS resin and stir using a high-shear mixer.

[0040] Stirring temperature and time: Put the above mixture into the mixer, set the temperature to 50℃, and stir for 30 minutes to ensure uniform dispersion of filler and resin.

[0041] Melt blending: The mixture is fed into a twin-screw extruder with the hopper zone temperature set at 180℃, the compression zone temperature at 200℃, the die zone temperature at 210℃, the extruder screw speed set at 250 rpm, and the extrusion speed at 1.5-2.0 kg / h.

[0042] Cooling and pelletizing: The extruded material is cooled at a rate of 15-20℃ / min. After cooling to 90℃, it is cut into 3-5mm pellets by a pelletizer.

[0043] Injection molding: The granular material was fed into the injection molding machine, the injection temperature was set to 220℃, the injection pressure to 80-120MPa, and the holding time to 10 seconds. Due to the high melting point of PTFE and its poor material flowability, the surface gloss of the product was not as good as that in Example 1.

[0044] Comparative Example 3 The difference between this comparative example and Example 1 is that: This comparative example used a calcium-zinc composite stabilizer as a heat stabilizer, primarily to improve the resin's thermal stability; however, its resistance to UV aging is relatively weak. Under high temperatures and UV irradiation, the material may age, leading to a decrease in gloss.

[0045] Preparation method: Mixing of filler and ABS resin: Mix 5 parts of calcium zinc composite stabilizer with 70 parts of ABS resin and 0.5 parts each of silicon nitride and aluminum nitride.

[0046] Mixing: Place the mixture in a mixer, mix at 60°C for 30 minutes.

[0047] Addition of functional polymers: Add polytetrafluoroethylene (2 parts) and polyarylene (2 parts), mix and continue stirring for 20 minutes.

[0048] Blending: The mixture is fed into a twin-screw extruder, with the temperature set at 180℃ (hopper zone), 200℃ (compression zone), and 210℃ (die zone), the screw speed at 250 rpm, and the extrusion speed at 1.5-2.0 kg / h.

[0049] Cooling and pelletizing: The cooling rate is 15-20℃ / min, and the pellets are cut into 3-5mm particles.

[0050] Injection molding: The granular material is injection molded at a temperature of 220℃, an injection pressure of 80-120 MPa, and a holding time of 10 seconds.

[0051] Comparative Example 4 The difference between this comparative example and Example 1 is that: This comparative example did not use hydrogen fluoride solution to spray the filler, but instead added the filler directly to the ABS resin through a simple physical mixing method without surface modification treatment. This resulted in poor dispersibility of the filler, affecting the overall performance of the material, especially its heat resistance and gloss.

[0052] Preparation method: Filler mixing: Calcium silicate nanopowder (3 parts), aluminum titanate (2 parts), silicon nitride (0.5 parts), and aluminum nitride (0.5 parts) were directly added to ABS resin (70 parts).

[0053] Mixing: The above materials were put into a high shear mixer, the mixing temperature was 60℃, and the mixing time was 30 minutes. The mixing was uneven and the dispersibility of the filler was poor.

[0054] Addition of functional polymers: Add polyurethane-olefin copolymer (2 parts), polyethylene (2 parts) and polyamide-polybenzothiadiazole (PA-PBTZ) (1 part), stir at 60°C for 20 minutes.

[0055] Melt blending: The mixture is fed into a twin-screw extruder, with the hopper zone temperature set at 180°C, the compression zone at 200°C, and the die zone at 210°C. The extruded material is then cooled and pelletized.

[0056] Injection molding: The final molding is carried out using an injection molding machine at a temperature of 220℃ and a pressure of 80-120 MPa. Due to poor filler dispersibility, the final product has low gloss and thermal stability.

[0057] The performance of Example 1 and Comparative Examples 1-4 will be tested below. The test results are as follows: (1) High gloss test Experimental method: The gloss of the material surface was measured using a surface gloss meter (such as a 60° gloss meter).

[0058] Test content: Gloss value (unit: GU). The gloss is evaluated by testing the intensity of reflected light on the material surface under different lighting angles.

[0059] (2) Heat resistance test Experimental methods: Thermogravimetric analysis (TGA) was used to test the thermal stability of the materials. The samples were heated in a nitrogen or air atmosphere, and the mass change of the materials was monitored.

[0060] Test content: Test the thermal weight loss (weight change) of materials with different formulations under high temperature conditions of 200℃-300℃, and evaluate their thermal degradation temperature.

[0061] (3) Mechanical property testing (tensile and impact strength) Experimental methods: Tensile strength tests were conducted according to ASTM D638 standard, and notched impact tests were conducted according to ISO 179 standard.

[0062] Test items include: tensile strength, elongation at break, and notched impact strength.

[0063] (4) Antioxidant test Experimental method: Accelerated aging test was adopted, in which the samples were exposed to ultraviolet (UV) light (such as using a XenonArc climate chamber) for aging test.

[0064] Testing content: By measuring the changes of materials under ultraviolet light and humidity, we analyze their antioxidant capacity and color changes.

[0065] (5) Molding process and processing performance Experimental methods: The processing fluidity of the material was tested using a **melt flow rate (MFR)** tester, which measured its fluidity at a specific temperature.

[0066] Test content: Melt flow index (g / 10min) obtained by MFR test.

[0067] (6) Durability and aging tests Experimental method: The material was subjected to accelerated aging tests such as UV light irradiation and damp heat cycling using a xenon lamp accelerated aging test machine for 500 hours.

[0068] Test content: The test material's mechanical properties deteriorate under long-term ultraviolet radiation, humid heat, oxidation and other environments.

[0069] (7) Filler and resin compatibility test Experimental methods: The storage modulus and loss modulus of the material were tested by dynamic mechanical analysis (DMA) to further evaluate the compatibility between the filler and the resin.

[0070] Test content: Evaluate the effect of fillers on the mechanical properties of the resin matrix, especially the enhancement of modulus.

[0071] The test results are shown in Table 1: Table 1 Test Result Record Sheet

[0072] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A high-gloss, heat-resistant ABS material, characterized in that, By weight, it includes the following components: 65-75 parts of ABS resin; 2-4 parts of calcium silicate nanopowder; 1-3 parts of aluminotitanium; 0.25-1 part silicon nitride; 0.25-1 part aluminum nitride; 7-15 parts epoxy resin; Brightening additive: 0.5-1.5 parts; Antioxidant 0.1-0.5 parts; Heat stabilizer 0.2-1 part; 0.5-3 parts of acrylate comonomer; And functional polymers; The functional polymer is 1-3 parts of polyurethane-olefin copolymer, 0.5-2 parts of polyamide-polybenzothiadiazole and 0.5-3 parts of polyethylene.

2. The high-gloss, heat-resistant ABS material according to claim 1, characterized in that, The brightening additive is one or more of fluorinated polyurethane, fluorinated acrylate, or fluorinated epoxy resin.

3. The high-gloss, heat-resistant ABS material according to claim 1, characterized in that, The antioxidant is tert-butylhydroquinone or a combination thereof with a phosphate ester.

4. The high-gloss, heat-resistant ABS material according to claim 1, characterized in that, The heat stabilizer includes one or more of zinc oxide, tin-based compounds, and calcium-zinc composite heat stabilizers.

5. A method for preparing a high-gloss, heat-resistant ABS material according to any one of claims 1-4, characterized in that, Includes the following steps: Step 1: Mix calcium silicate nanopowder, aluminotitanium, silicon nitride, and aluminum nitride as fillers and soak them in a 5% sodium hydroxide solution; Step 2: Spray the filler surface with a 20% hydrogen fluoride solution for 20 minutes. After removal, ultrasonically clean it in ultrapure water and then dry it. Step 3: Mix the filler and ABS resin in the following proportions to obtain mixture A: 65-75 parts of ABS resin; 2-4 parts of calcium silicate nanopowder; 1-3 parts of aluminotitanium; 0.25-1 part silicon nitride; 0.25-1 part aluminum nitride; 7-15 parts epoxy resin; Brightening additive: 0.5-1.5 parts; Antioxidant 0.1-0.5 parts; Heat stabilizer 0.2-1 part; 0.5-3 parts of acrylate comonomer; Step 4: Add the polyurethane-olefin copolymer, polyamide-polybenzothiadiazole copolymer, and polyethylene to mixture A in the following proportions to obtain mixture B: 1-3 parts of polyurethane-olefin copolymer; 0.5-2 parts of polyamide-polybenzothiadiazole; Polyethylene 0.5-3 parts; The stirring temperature was set to 60℃, and the stirring time was 20 minutes. Step 5: Add mixture B to a twin-screw extruder for melt blending. Cool the extruded molten material and stretch and pelletize it during the cooling process to obtain granular material. Step 6: Coat the particulate material with a composite coating and cure it with ultraviolet light. The composite coating contains a brightening additive, an antioxidant, and a heat stabilizer. Step 7: Feed the granular material from Step 6 into the injection molding machine for final molding.

6. The method for preparing the high-gloss heat-resistant ABS material according to claim 5, characterized in that, In step 4, the polyurethane-olefin copolymer, polyamide-polybenzothiadiazole copolymer, polyethylene and mixture A are placed in a high-shear mixer at a speed of 3000-5000 rpm for 20-30 minutes.

7. The method for preparing the high-gloss heat-resistant ABS material according to claim 5, characterized in that, In step 5, the cooling rate of the twin-screw extruder is 15-20°C.

8. The method for preparing the high-gloss heat-resistant ABS material according to claim 5, characterized in that, In step 5, during the melt blending process, the temperatures are set as follows: hopper zone: 180℃, compression zone: 200℃, and mold zone: 210℃.

9. The method for preparing the high-gloss heat-resistant ABS material according to claim 5, characterized in that, In step 8, the injection temperature is 220℃, the injection pressure is 80-120MPa, and the holding time is 10s.

10. The method for preparing the high-gloss heat-resistant ABS material according to claim 5, characterized in that, The polyurethane-olefin copolymer has a molecular weight of 20,000-50,000, the polyamide-polybenzothiadiazole copolymer has a molecular weight of 10,000-30,000, and the polyethylene has a density of 0.92-0.96 g / cm³. 3 .

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