High-gloss weather-resistant ABS / PC composite material and preparation method thereof

Abstract

This invention provides a high-gloss, weather-resistant ABS / PC composite material and its preparation method, relating to the field of high-performance materials technology. The composite material provided by this invention comprises, by weight, 30-50 parts ABS resin, 50-70 parts PC resin, 5-15 parts toughening agent, 3-8 parts compatibilizer, 0.2-1.0 parts antioxidant, 0.5-2.0 parts lubricant, 0.5-3.0 parts modified pearlescent powder, 0.5-2.5 parts weather-resistant agent, 5-20 parts flame retardant, and 0.5-3.0 parts flame retardant synergist; wherein the weather-resistant agent includes one of benzotriazole and benzotriazole-triazine derivatives. By adding one of benzotriazole and benzotriazole-triazine derivatives as a weather-resistant agent to the composite material, this invention can effectively absorb and shield ultraviolet rays, significantly delaying the performance degradation of the composite material under light exposure, and effectively improving the durability of the composite material's surface gloss and the stability of its mechanical properties.

Description

Technical Field

[0001] This invention relates to the field of high-performance materials technology, and in particular to a high-gloss, weather-resistant ABS / PC composite material and its preparation method. Background Technology

[0002] Acrylonitrile-butadiene-styrene copolymer (ABS) and polycarbonate (PC) are two general-purpose plastics widely used in engineering fields. ABS is a typical multiphase polymer—the acrylonitrile phase provides rigidity, chemical resistance, and thermal stability; the butadiene phase, as a rubber dispersion phase, imparts excellent low-temperature impact toughness; and the styrene phase contributes good flowability and surface gloss. However, ABS has relatively poor heat resistance and weather resistance. PC, on the other hand, is a high-performance amorphous thermoplastic. The carbonate bonds in its molecular backbone give it extremely high impact strength, good dimensional stability, and thermal stability. However, PC is notch sensitive and has high melt viscosity. The ester bonds in PC are prone to hydrolysis and photoaging in humid, hot, or ultraviolet environments, leading to yellowing and performance degradation.

[0003] Currently, ABS and PC are melt-blended to create composite materials, achieving complementary and optimized properties of the two materials. In an ideal compatible system, the SAN phase in ABS can form a certain degree of interfacial bonding with PC, thereby constructing a rigid and tough interfacial structure at the microscopic level. Simultaneously, PC can improve the tensile strength, flexural modulus, and thermal stability of ABS, expanding the application scope of the composite material at higher temperatures. Furthermore, the dispersed butadiene phase in ABS can passivate crack propagation, thereby improving PC's notch sensitivity, allowing the composite material to maintain high impact toughness over a wide temperature range. In addition, from a processing perspective, the ABS / PC composite reduces the viscosity of the pure PC melt, improving processing fluidity. Therefore, ABS / PC composites possess good molding properties, excellent low-temperature impact resistance, and high heat distortion temperature and light stability, making them widely used in automotive, electronics, and office equipment industries.

[0004] However, although ABS / PC composites have seen significant improvements in mechanical properties and thermal stability, their long-term durability in outdoor or sunlight-exposed environments remains a significant weakness. This is mainly because polycarbonate is prone to photofriction rearrangement under ultraviolet radiation, generating phenol which is further oxidized into chromophores. This leads to rapid yellowing of the composite material. Simultaneously, the butadiene segments in ABS undergo chain breakage and cross-linking under ultraviolet radiation and oxygen. The synergistic effect of these two factors causes the material to yellow rapidly, lose its surface gloss quickly, and even induce micro-cracks from the surface, leading to material pulverization and inward propagation. Ultimately, this results in surface embrittlement of the composite material, a significant decrease in mechanical properties, and a serious impact on the appearance durability and structural stability of the composite material. Therefore, there is an urgent need to provide a solution to improve these problems. Summary of the Invention

[0005] The purpose of this invention is to provide a high-gloss weather-resistant ABS / PC composite material and its preparation method. By adding one of benzotriazole or benzotriazole-triazine derivatives as a weather-resistant agent to the composite material, ultraviolet rays can be effectively absorbed and shielded, significantly delaying the performance degradation of the composite material under light exposure, and effectively improving the durability of the surface gloss and the stability of mechanical properties of the composite material.

[0006] In a first aspect, the present invention provides a high-gloss weather-resistant ABS / PC composite material, comprising, by weight: 30-50 parts ABS resin, 50-70 parts PC resin, 5-15 parts toughening agent, 3-8 parts compatibilizer, 0.2-1.0 parts antioxidant, 0.5-2.0 parts lubricant, 0.5-3.0 parts modified pearlescent powder, 0.5-2.5 parts weather-resistant agent, 5-20 parts flame retardant, and 0.5-3.0 parts flame retardant synergist; wherein the weather-resistant agent comprises one of benzotriazole and benzotriazole-triazine derivatives.

[0007] Optionally, the preparation method of the benzotriazole-triazine derivative includes: stirring a benzotriazole solution with a cyanuric chloride solution in 0℃-5℃ for 2h-4h to obtain a precursor solution; stirring an alkylamine solution with the precursor solution in 40℃-60℃ for 4h-6h to obtain an intermediate solution; and extracting, washing, drying, rotary evaporating and concentrating the intermediate solution, and recrystallizing to obtain the benzotriazole-triazine derivative.

[0008] Optionally, the benzotriazole solute in the benzotriazole solution includes one of 2-(2'-hydroxy-5'-methylphenyl)benzotriazole and 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)benzotriazole.

[0009] Optionally, the benzotriazole solution is added dropwise to the cyanuric chloride solution.

[0010] Optionally, the molar ratio of benzotriazole solute in the benzotriazole solution to cyanuric chloride in the cyanuric chloride solution is (1-1.05):1.

[0011] Optionally, the benzotriazole solution also contains dissolved triethylamine, and the molar ratio of triethylamine to benzotriazole solute in the benzotriazole solution is (1-1.5):1.

[0012] Optionally, the alkylamine solute in the alkylamine solution includes one of n-butylamine, isopropylamine, and cyclohexylamine.

[0013] Optionally, the molar ratio of alkylamine solute in the alkylamine solution to cyanuric chloride in the cyanuric chloride solution is (1.2-1.5):1.

[0014] Optionally, the alkylamine solution is added dropwise to the precursor solution.

[0015] Optionally, the solvents for the benzotriazole solution, cyanuric chloride solution, and alkylamine solution independently include one of tetrahydrofuran and acetonitrile.

[0016] Optionally, the intermediate solution can be precipitated at -4°C to 0°C.

[0017] Optionally, the isocyanate solution and the intermediate solution are stirred and reacted at 30℃-50℃ in a protective atmosphere for 3h-6h to obtain a composite solution; the composite solution is then separated, washed, and recrystallized at low temperature to obtain a benzotriazole-triazine derivative.

[0018] Optionally, the isocyanate solute in the isocyanate solution includes one of hexamethylene diisocyanate and isophorone diisocyanate.

[0019] Optionally, the solvent for the isocyanate solution includes one of tetrahydrofuran and acetonitrile.

[0020] Optionally, the molar ratio of isocyanate solute in the isocyanate solution to cyanuric chloride in the cyanuric chloride solution is (1-1.1):1.

[0021] Optionally, the isocyanate solution is added dropwise to the intermediate solution at 20°C-30°C under a protective atmosphere.

[0022] Optionally, the isocyanate solution and the intermediate solution are stirred and reacted under the action of an organotin catalyst, wherein the organotin catalyst includes dibutyltin dilaurate.

[0023] Optionally, the method for preparing the modified pearlescent powder includes: wetting the pearlescent powder in an active solution containing a surfactant, then separating and drying it to obtain the modified pearlescent powder.

[0024] Optionally, the surfactant includes one of silane coupling agents and titanate coupling agents.

[0025] Optionally, the solid-liquid ratio of the pearlescent powder in the active solution is 0.06 g / mL to 0.10 g / mL.

[0026] Optionally, the pearlescent powder is ultrasonically dispersed in an active solution.

[0027] Optionally, the pearlescent powder includes one of white pigment powder and silver pigment powder.

[0028] Optionally, the mass ratio of the pearlescent powder to the surfactant is 1:(0.1-0.12).

[0029] Optionally, the ABS matrix includes Chi Mei PA-758.

[0030] Optionally, the PC resin includes Teijin L-1250Y.

[0031] Optionally, the toughening agent comprises high-polymer powder.

[0032] Optionally, the compatibilizer includes a maleic anhydride-styrene copolymer.

[0033] Optionally, the antioxidant includes one of antioxidant 1010, antioxidant 1076, and antioxidant 168.

[0034] Optionally, the lubricant includes one of zinc stearate, polyethylene wax, and polytetrafluoroethylene.

[0035] Optionally, the flame retardant includes one of decabromodiphenyl ether, decabromodiphenyl ethane, and bromophenol.

[0036] Optionally, the modified pearlescent powder has an average particle size of 100μm-200μm.

[0037] Optionally, the flame retardant synergist includes nano-antimony pentoxide.

[0038] Secondly, the present invention also provides a method for preparing any of the above-mentioned optional composite materials, comprising: mixing ABS resin, PC resin, toughening agent, compatibilizer, antioxidant, lubricant, pearlescent powder, weathering agent, flame retardant, and flame retardant synergist in a high-speed mixer to obtain a preliminary mixture; and melting-extruding and granulating the preliminary mixture in a twin-screw extruder to obtain a high-gloss weather-resistant ABS / PC composite material.

[0039] Optionally, the temperature in the twin-screw extruder is 180℃-210℃ in zone 1, 220℃-240℃ in zone 2, 220℃-240℃ in zone 3, 200℃-230℃ in zone 4, 200℃-230℃ in zone 5, 210℃-240℃ in zone 6, 210℃-240℃ in zone 7, and 210℃-240℃ in zone 8; the screw speed of the twin-screw extruder is 300rpm-400rpm.

[0040] The high-gloss, weather-resistant ABS / PC composite material provided by this invention has at least one of the following beneficial technical effects compared to the prior art: 1. Adding benzotriazole-triazine derivatives as weathering agents to composite materials allows the benzotriazole unit to efficiently absorb ultraviolet light, while the triazine ring enhances the thermal and chemical stability of the derivatives. Through the synergistic effect of benzotriazole and the triazine ring, the absorption range of the weathering agent for ultraviolet light can be broadened, resulting in minimal color change of the composite material after long-term light exposure, effectively inhibiting surface yellowing and maintaining surface gloss. In addition, it can improve the resistance of the composite material to damp heat aging. The amination reaction eliminates highly reactive chlorine atoms, preventing acidic substances from catalyzing the hydrolysis of polycarbonate components. 2. When preparing benzotriazole-triazine derivatives, isocyanate groups are introduced. Through addition polymerization of isocyanate with the active groups at the ends of intermediate molecules, multiple intermediate monomer molecules can be linked into long polymer chains with repeating units, thereby increasing the molecular weight. This enhances the stability of the weather-resistant agent in the composite material and avoids the decrease in weather resistance caused by migration and precipitation. In addition, the long polymer chains can generate stronger interactions with the composite matrix, which helps to improve compatibility and dispersion uniformity, and avoids damage to mechanical properties caused by stress concentration points formed by phase separation. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this invention pertains.

[0042] Preparation Example 1 Example 1 of this preparation provides a method for preparing a benzotriazole-triazine derivative, comprising the following steps: S1. 2-(2'-hydroxy-5'-methylphenyl)benzotriazole (CAS: 2440-22-4; UV-71) and triethylamine (CAS: 121-44-8) were added to tetrahydrofuran at a molar ratio of 1:1 and stirred to dissolve, thus preparing a benzotriazole solution. Cyanurium chloride (CAS: 108-77-0) was dissolved in tetrahydrofuran to prepare a cyanurium chloride solution. After pre-cooling the cyanurium chloride solution in an ice bath at 0°C, the benzotriazole solution was added dropwise to the cyanurium chloride solution at a rate of 2 mL / min at 300 rpm. After the addition was complete, the mixture was stirred and reacted for 3 hours to obtain the precursor solution. The molar ratio of 2-(2'-hydroxy-5'-methylphenyl)benzotriazole to cyanurium chloride was controlled to be 1.05:1. S2. Cyclohexylamine (CAS: 108-91-8) was dissolved in tetrahydrofuran to prepare a cyclohexylamine solution. The precursor solution was then heated to 50°C, and the cyclohexylamine solution was added dropwise to the precursor solution at a rate of 2 mL / min at 300 rpm. After the addition was completed, the mixture was stirred and reacted for 5 h to obtain an intermediate solution. The molar ratio of cyclohexylamine to cyanuric chloride was controlled to be 1.3:1. S3. At room temperature, the intermediate solution was mixed with ethyl acetate at a volume ratio of 1:3 to obtain a diluent. The diluent was washed successively with 1 mol / L hydrochloric acid solution, saturated sodium bicarbonate aqueous solution, and saturated sodium chloride solution, retaining the organic phase in each wash. The organic phase obtained after washing was dehydrated and dried with anhydrous magnesium sulfate to obtain the dehydrated phase. After rotary evaporation and concentration, it was recrystallized with anhydrous ethanol to obtain the benzotriazole-triazine derivative.

[0043] Preparation Example 2 Preparation Example 2 provides a method for preparing a benzotriazole-triazine derivative, which differs from Preparation Example 1 in that, in step S1, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)benzotriazole (CAS: 3846-71-7; UV-320) and triethylamine (CAS: 121-44-8) are added to tetrahydrofuran in a 1:1 molar ratio and stirred to dissolve, thereby obtaining a benzotriazole solution.

[0044] Preparation Example 3 Preparation Example 3 provides a method for preparing a benzotriazole-triazine derivative, which differs from Preparation Example 1 in that, in step S2, n-butylamine (CAS: 109-73-9) is stirred and dissolved in tetrahydrofuran to obtain a n-butylamine solution.

[0045] Preparation Example 4 Preparation Example 4 provides a method for preparing a benzotriazole-triazine derivative, which differs from Preparation Example 1 in that step S2 is not performed, and in step S3 the precursor solution is mixed with ethyl acetate at a volume ratio of 1:3 to obtain a diluted solution.

[0046] Preparation Example 5 Preparation Example 5 provides a method for preparing a benzotriazole-triazine derivative, which differs from Preparation Example 1 in that it includes the following steps after step S2: S3. Hexamethylene diisocyanate (CAS: 822-06-0) was dissolved in tetrahydrofuran to prepare an isocyanate solution. The intermediate solution was transferred to an argon atmosphere, and 1 wt% dibutyltin dilaurate was added and dispersed by stirring. The isocyanate solution was then added dropwise to the intermediate solution at a rate of 2 mL / min at room temperature of 25 °C. After stirring and reacting for 5 h, a composite solution was obtained. The molar ratio of hexamethylene diisocyanate to cyanuric chloride was controlled to be 1.1:1. S4. At room temperature, the composite solution is mixed with ethyl acetate at a volume ratio of 1:3 to obtain a diluent. The diluent is washed successively with 1 mol / L hydrochloric acid solution, saturated sodium bicarbonate aqueous solution, and saturated sodium chloride solution, retaining the organic phase in each wash. The organic phase obtained after washing is dehydrated and dried using anhydrous magnesium sulfate to separate the dehydrated phase. After rotary evaporation and concentration, it is recrystallized with anhydrous ethanol to obtain the benzotriazole-triazine derivative.

[0047] Preparation Example 6 Preparation Example 6 provides a method for preparing a benzotriazole-triazine derivative, which differs from Preparation Example 5 in that, in step S3, isophorone diisocyanate (CAS: 4098-71-9) is stirred and dissolved in tetrahydrofuran to obtain an isocyanate solution.

[0048] Preparation Example 7 Preparation Example 7 provides a method for preparing modified phosphor, comprising: adding white pigment (Merck pearlescent powder, Iriodin 96111) with an average particle size of 150 μm to a KH550 aqueous solution at a solid-liquid ratio of 0.08 g / mL (the mass ratio of pigment to KH550 is 1:0.1), ultrasonically dispersing at 200 W for 15 min, separating by filtration, and drying at 50 °C to constant weight to obtain modified phosphor.

[0049] Examples 1 to 3 Examples 1 to 3 provide a high-gloss, weather-resistant ABS / PC composite material, wherein the dosage of each component is shown in Table 1 below.

[0050] Table 1. Dosage of each component in the composite material in Examples 1 to 3

[0051] In Examples 1 to 3: the ABS resin used was Chimei PA-758, the PC resin used was Teijin L-1250Y, the toughening agent used was high-resin powder HR-181 purchased from Dongguan Chuangshi Plastic Raw Materials Co., Ltd., the compatibilizer used was maleic anhydride-styrene copolymer SMA1000 purchased from Greenlink (Jining) Chemical Technology Co., Ltd., the lubricant used was polyethylene wax, the antioxidant used was antioxidant 1010 and antioxidant 1076 in a mass ratio of 1:1, the flame retardant used was decabromodiphenyl ether, the flame retardant synergist used was nano-grade antimony pentoxide (purchased from Wuhan Jiyesheng Chemical Co., Ltd., with an average particle size of 100nm), the modified pearlescent powder used was the modified pearlescent powder obtained in Preparation Example 7, and the weathering agent used was the benzotriazole-triazine derivative obtained in Preparation Example 1.

[0052] The preparation methods of high-gloss weather-resistant ABS / PC composite materials in Examples 1 to 3 include: mixing raw materials in a high-speed mixer to obtain a preliminary mixture, adding the preliminary mixture into the feeding hopper of a twin-screw extruder, setting the screw speed of the twin-screw extruder to 300 rpm, and setting the temperatures of zones one to eight to be 200℃, 230℃, 230℃, 220℃, 220℃, 220℃, 210℃, and 210℃, respectively, and extruding and granulating the mixture through the twin-screw extruder to obtain the high-gloss weather-resistant ABS / PC composite material.

[0053] Examples 4 to 9 Examples 4 to 9 provide a high-gloss weather-resistant ABS / PC composite material, which differs from Example 3 in that the types of weather-resistant agents used are different, as shown in Table 2 below.

[0054] Table 2. Types of weather-resistant agents used in the composite materials of Examples 3 to 9.

[0055] Comparative Example 1 Comparative Example 1 provides a high-gloss weather-resistant ABS / PC composite material, which differs from Example 3 in that the weather-resistant agent used is a mixture of UV-71, cyanuric chloride, and cyclohexylamine in a molar ratio of 1:1:1.3.

[0056] Comparative Example 2 Comparative Example 2 provides a high-gloss weather-resistant ABS / PC composite material, which differs from Example 3 in that the weather-resistant agent used is a mixture of UV-71, cyanuric chloride, cyclohexylamine, and hexamethylene diisocyanate in a molar ratio of 1:1:1.3:1.1.

[0057] Comparative Example 3 Comparative Example 3 provides a high-gloss, weather-resistant ABS / PC composite material. The difference from Example 3 is that an equal amount of white pigment (Merck pearlescent powder, Iriodin 96111) with an average particle size of 150 μm is used instead of the modified fluorescent powder.

[0058] Performance testing The tensile strength of the high-gloss weather-resistant ABS / PC composites prepared in Examples 1 to 9 and Comparative Examples 1 to 3 was tested at a tensile rate of 50 mm / min, according to the standard described in ASTM D638. The high-gloss weather-resistant ABS / PC composite materials prepared in Examples 1 to 9 and Comparative Examples 1 to 3 were tested for flexural strength at a bending rate of 3 mm / min, according to the standard described in ASTM D790. The notched impact strength of the high-gloss weather-resistant ABS / PC composite materials prepared in Examples 1 to 9 and Comparative Examples 1 to 3 was tested according to the standard described in ASTM D256. The light aging resistance of the high-gloss weather-resistant ABS / PC composite materials prepared in Examples 1 to 9 and Comparative Examples 1 to 3 was tested according to the standard described in SAE J1885. ΔE was calculated after irradiation under a xenon lamp for 1000 hours. The high-gloss weather-resistant ABS / PC composite materials prepared in Examples 1 to 9 and Comparative Examples 1 to 3 were subjected to accelerated aging treatment at 105°C and 85%RH for 1200 hours in a constant temperature and humidity aging test chamber. Based on the standard described in ASTM D638, tensile tests were conducted at a tensile rate of 50 mm / min, and the tensile strength retention rate after wet heat aging was calculated. Each experiment was conducted in three groups, and the average value was calculated. The above test results are shown in Table 3 below.

[0059] Table 3 Performance test data of composite materials

[0060] While embodiments of the present invention have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations fall within the scope and spirit of the invention as set forth in the claims. Furthermore, the invention described herein may have other embodiments and can be implemented or carried out in various ways.

Claims

1. A high-gloss, weather-resistant ABS / PC composite material, characterized in that, The product comprises, by weight, 30-50 parts ABS resin, 50-70 parts PC resin, 5-15 parts toughening agent, 3-8 parts compatibilizer, 0.2-1.0 parts antioxidant, 0.5-2.0 parts lubricant, 0.5-3.0 parts modified pearlescent powder, 0.5-2.5 parts weathering agent, 5-20 parts flame retardant, and 0.5-3.0 parts flame retardant synergist; wherein the weathering agent comprises one of benzotriazole and benzotriazole-triazine derivatives.

2. The composite material according to claim 1, characterized in that: The preparation method of the benzotriazole-triazine derivative includes: stirring a benzotriazole solution with a cyanuric chloride solution at 0℃-5℃ for 2h-4h to obtain a precursor solution; stirring an alkylamine solution with the precursor solution at 40℃-60℃ for 4h-6h to obtain an intermediate solution; and extracting, washing, drying, rotary evaporating and concentrating the intermediate solution, and recrystallizing to obtain the benzotriazole-triazine derivative.

3. The composite material according to claim 2, characterized in that: The benzotriazole solution contains one of 2-(2'-hydroxy-5'-methylphenyl)benzotriazole and 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)benzotriazole; and / or, the benzotriazole solution is added dropwise to the cyanuric chloride solution; and / or, the molar ratio of the benzotriazole solution to the cyanuric chloride in the benzotriazole solution is (1-1.05):1; and / or, the benzotriazole solution also contains triethylamine, and the molar ratio of the triethylamine to the benzotriazole solution is (1-1.5):

1.

4. The composite material according to claim 2, characterized in that: The alkylamine solute in the alkylamine solution includes one of n-butylamine, isopropylamine, and cyclohexylamine; and / or, the molar ratio of the alkylamine solute in the alkylamine solution to the cyanuric chloride in the cyanuric chloride solution is (1.2-1.5):1; and / or, the alkylamine solution is added dropwise to the precursor solution; and / or, the solvents of the benzotriazole solution, the cyanuric chloride solution, and the alkylamine solution independently include one of tetrahydrofuran and acetonitrile; and / or, the intermediate solution is precipitated at -4℃ to 0℃.

5. The composite material according to claim 2, characterized in that: A composite solution is prepared by stirring an isocyanate solution and an intermediate solution in a protective atmosphere at 30℃-50℃ for 3-6 hours. The composite solution is then extracted, washed, dried, concentrated by rotary evaporation, and recrystallized to obtain a benzotriazole-triazine derivative. The isocyanate solute in the isocyanate solution includes one of hexamethylene diisocyanate and isophorone diisocyanate. The solvent of the isocyanate solution includes one of tetrahydrofuran and acetonitrile.

6. The composite material according to claim 5, characterized in that: The molar ratio of isocyanate solute in the isocyanate solution to cyanuric chloride in the cyanuric chloride solution is (1-1.1):1; and / or, the isocyanate solution is added dropwise to the intermediate solution at 20°C-30°C under a protective atmosphere; and / or, the isocyanate solution and the intermediate solution are stirred and reacted under the action of an organotin catalyst, wherein the organotin catalyst includes dibutyltin dilaurate.

7. The composite material according to claim 1, characterized in that: The method for preparing the modified pearlescent powder includes: wetting the pearlescent powder in an active solution containing a surfactant, then separating and drying it to obtain the modified pearlescent powder; wherein: the surfactant includes one of a silane coupling agent and a titanate coupling agent; and / or, the solid-liquid ratio of the pearlescent powder in the active solution is 0.06 g / mL-0.10 g / mL; and / or, ultrasonically dispersing the pearlescent powder in the active solution; and / or, the pearlescent powder includes one of a white pigment and a silver pigment; and / or, the mass ratio of the pearlescent powder to the surfactant is 1:(0.1-0.12).

8. The composite material according to claim 1, characterized in that: The ABS matrix includes Chimei PA-758; and / or, the PC resin includes Teijin L-1250Y; and / or, the toughening agent includes high-resin powder; and / or, the compatibilizer includes maleic anhydride-styrene copolymer; and / or, the antioxidant includes one of antioxidant 1010, antioxidant 1076, and antioxidant 168; and / or, the lubricant includes one of zinc stearate, polyethylene wax, and polytetrafluoroethylene; and / or, the flame retardant includes one of decabromodiphenyl ether, decabromodiphenyl ethane, and bromophenol; and / or, the modified pearlescent powder has an average particle size of 100μm-200μm; and / or, the flame retardant synergist includes nano-antimony pentoxide.

9. A method for preparing the composite material according to any one of claims 1 to 8, characterized in that, include: ABS resin, PC resin, toughening agent, compatibilizer, antioxidant, lubricant, pearlescent powder, weathering agent, flame retardant, and flame retardant synergist are mixed in a high-speed mixer to obtain a primary mixture; the primary mixture is melt-extruded and granulated in a twin-screw extruder to obtain a high-gloss weather-resistant ABS / PC composite material.

10. The preparation method according to claim 9, characterized in that: The twin-screw extruder has the following temperature zones: Zone 1: 180℃-210℃; Zone 2: 220℃-240℃; Zone 3: 220℃-240℃; Zone 4: 200℃-230℃; Zone 5: 200℃-230℃; Zone 6: 210℃-240℃; Zone 7: 210℃-240℃; Zone 8: 210℃-240℃; and the screw speed is 300 rpm-400 rpm.

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