PC / ABS alloy compatibilized by bi-component compatilizer and preparation method of PC / ABS alloy

Abstract

The invention discloses a PC / ABS alloy compatibilized by a double-component compatilizer and a preparation method of the PC / ABS alloy. The PC / ABS alloy comprises the following components in parts by mass: 60-85 parts of PC, 15-40 parts of ABS, 1-4 parts of SAG, 2-4 parts of SBG, 0.3-0.4 part of an antioxidant and 0.3-0.4 part of PETS. The method comprises the following steps: drying the raw materials, fully mixing and uniformly stirring the raw materials according to the formula, extruding by a twin-screw extruder, cooling, drawing, introducing into a granulator for granulation, and collecting granules, thereby obtaining the PC / ABS alloy compatibilized by the bi-component compatilizer. In the raw material formula, the double-component compatilizer is used for compatibilizing and modifying the PC / ABS, the processing viscosity of the PC and the processing viscosity of the ABS are matched by controlling the ratio of the PC to the ABS, a nanoscale sea-island structure is obtained, the phase distribution of the PC / ABS alloy is effectively optimized, the alloy has good impact toughness while the strength is ensured, and the service life of the alloy is prolonged. The material can be widely applied to preparation of automotive upholstery.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, and in particular to a PC / ABS alloy expanded by a two-component compatibilizer and a preparation method thereof. Background Art

[0002] As one of the main engineering plastics, polycarbonate (PC) has the advantages of high impact strength, good creep resistance and dimensional stability, and heat resistance. At the same time, it also has disadvantages such as poor processing fluidity, easy stress cracking, notch sensitivity, easy wear, poor alkali resistance, and high price. Acrylonitrile-butadiene-styrene terpolymer resin (ABS) has good impact resistance and processing fluidity, easy processing, good toughness, dimensional stability, chemical resistance and low price, but it is lacking in mechanical properties. Blending PC and ABS can make up for the shortcomings of single-component materials. The PC / ABS alloy material obtained after blending has many advantages such as low viscosity, easy processing, high strength, high toughness, corrosion resistance, etc., achieving the effect of taking advantage of each other's strengths and making up for each other's weaknesses. At present, it has become a type of engineering plastic that accounts for a large proportion of automotive plastics.

[0003] PC / ABS alloy is a partially compatible system. The compatibility of the blending system directly affects the various performance indicators of the alloy. PC / ABS alloy usually has uneven phase distribution and oversized domain size, which leads to decreased mechanical properties and instability of the alloy, and there are safety hazards in the use of automotive interiors. In order to improve the compatibility of the blending system, the method of adding a compatibilizer to the system is generally adopted, and a reactive compatibilizer with appropriate functional groups is selected so that the compatibilizer is distributed on the interface between PC and ABS, thereby improving the compatibility of the two phases and forming a phase structure with nanometer scale.

[0004] Many reports and studies at home and abroad use a single type of compatibilizer to modify PC / ABS alloys, and there are few studies on the use of two or more compatibilizers to increase the compatibilization of the alloy and the effect on its mechanical properties. However, the mechanical properties of PC / ABS alloy materials increased by a single-component compatibilizer need to be further improved in terms of balancing tensile strength and impact toughness, and none of them mention the effect of the introduction of compatibilizers on the phase distribution and domain size in PC / ABS alloys, which is the key to determining the final performance of PC / ABS alloy materials. Therefore, the art still needs to develop a simple and efficient two-component compatibilizer synergistic volume increase modification method for regulating the uniformity of the phase distribution of alloy materials and reducing the size of the domains, further improving the balance and stability of the mechanical properties of PC / ABS alloys, and enhancing the advantages of PC / ABS alloys in the application of automotive interior parts. Summary of the invention

[0005] The object of the present invention is to provide a two-component compatibilizer-enhanced PC / ABS alloy and a preparation method thereof, which can regulate the uniformity of phase distribution of the alloy material and reduce the size of the phase domain, thereby improving the balance and stability of the mechanical properties of the PC / ABS alloy.

[0006] In one aspect of the present invention, the present invention proposes a two-component compatibilizer-extended PC / ABS alloy. According to an embodiment of the present invention, the two-component compatibilizer-extended PC / ABS alloy comprises the following components in parts by mass: 60-85 parts of PC (polycarbonate), 15-40 parts of ABS (acrylonitrile-butadiene-styrene terpolymer resin), 1-4 parts of SAG (styrene-acrylonitrile-glycidyl methacrylate), 2-4 parts of SBG (styrene-butadiene-glycidyl methacrylate), 0.3-0.4 parts of antioxidant, and 0.3-0.4 parts of PETS (pentaerythritol stearate).

[0007] Among them, the SAG can refine the PC / ABS phase and improve the thermal processing stability of PC / ABS; the SBG is a new core / shell structure toughening agent containing highly active epoxy functional groups, which can improve the compatibility and toughness of PC / ABS;

[0008] SAG contains highly active epoxy groups (GMA), which can improve the compatibility and impact resistance of PC / ABS alloys. The reactive functional groups can also effectively cap the terminal hydroxyl groups, improve the processing thermal stability, and avoid pitting or silver wire on the surface of injection molded parts. In addition, styrene-acrylonitrile copolymers have ultra-high fluidity, which can effectively promote the plasticization of materials, significantly reduce the viscosity and glass transition temperature of plastic melts, and effectively improve the cold resistance of alloys. SBG is styrene-butadiene-glycidyl methacrylate. Styrene and butadiene have good compatibility with ABS, and the epoxy groups in SBG can react with the carboxyl and hydroxyl groups in PC during the melt mixing process, which is used to increase the capacity and toughen PC / ABS alloys.

[0009] PETS plays the role of lubrication and diffusion in the present invention.

[0010] In addition, the PC / ABS alloy expanded by a two-component compatibilizer according to the above embodiment of the present invention may also have the following additional technical features:

[0011] In some embodiments of the present invention, the antioxidant includes antioxidant 1076 and antioxidant 168, and the mass ratio of antioxidant 1076 to antioxidant 168 is 1: 1. Antioxidants in the present invention play a role in resisting heat and thermal oxidation aging.

[0012] In another aspect of the present invention, the present invention proposes a method for preparing a PC / ABS alloy expanded with a two-component compatibilizer. According to an embodiment of the present invention, the preparation method comprises the following steps: drying each raw material, mixing and stirring the raw materials according to the formula, extruding the raw materials through a twin-screw extruder, cooling the raw materials, passing through a drawbar, and introducing the materials into a pelletizer for granulation. The collected pellets are the PC / ABS alloy expanded with a two-component compatibilizer.

[0013] In addition, the method for preparing a two-component compatibilizer-extended PC / ABS alloy according to the above embodiment of the present invention may also have the following additional technical features:

[0014] In some embodiments of the present invention, the drying is carried out in a forced air oven.

[0015] In some embodiments of the present invention, the drying temperature is 80-110° C., and the drying time is 4-6 hours.

[0016] In some embodiments of the present invention, the temperature of the twin-screw extruder is 240-270° C. If the temperature is too low, the pellets cannot be fully plasticized; if the temperature is too high, the material will be decomposed by heat.

[0017] In some embodiments of the present invention, the rotation speed of the twin-screw extruder is 300-450 rpm.

[0018] In some embodiments of the present invention, the pelletizer rotates at a speed of 400-700 rpm. If the pelletizer rotates too slowly, the particle size of the prepared particles is too large; if the pelletizer rotates too fast, the particle size of the prepared particles is too small and is not conducive to stranding.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention adopts a preparation process of stirring and mixing-melting blending-cooling granulation. According to the characteristics of the formula raw materials, various process parameters are optimized. By scientifically configuring technical parameters such as the temperature of the twin-screw extruder, the speed of the twin-screw extruder, and the speed of the pelletizer, the process flow is simplified and the manufacturing cost is reduced, while producing products with excellent performance.

[0021] 2. The raw material formula of the present invention adopts a two-component compatibilizer as a system to modify PC / ABS, thereby greatly improving the compatibility and mechanical properties of PC / ABS.

[0022] 3. The present invention selects PC and ABS of different viscosities, selects the best combination, and manufactures products with excellent performance, good phase dispersion and phase size.

[0023] 4. The PC / ABS alloy expanded with the two-component compatibilizer of the present invention has excellent mechanical properties such as high performance, high stability, high notched impact strength, etc., and has uniform phase distribution and smaller phase size. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a scanning electron microscope image of the brittle fracture etching of comparative example 1 of the present invention;

[0025] Figure 2 This is a scanning electron microscope image of the brittle fracture etching of comparative example 2 of the present invention;

[0026] Figure 3 This is a scanning electron microscope image of the brittle fracture etching of comparative example 3 of the present invention;

[0027] Figure 4 This is a scanning electron microscope image of the brittle fracture etching of comparative example 4 of the present invention;

[0028] Figure 5 This is a scanning electron microscope image of the brittle fracture etching of comparative example 5 of the present invention;

[0029] Figure 6 This is a scanning electron microscope image of the brittle fracture etching of comparative example 6 of the present invention;

[0030] Figure 7 This is a scanning electron microscope image of the brittle fracture etching of comparative example 7 of the present invention;

[0031] Figure 8 This is a scanning electron microscope image of the brittle fracture etching of comparative example 8 of the present invention;

[0032] Fig. 9 This is a scanning electron microscope image of the brittle fracture etching of Example 1 of the present invention;

[0033] Fig.10 This is a scanning electron microscope image of the brittle fracture etching of Example 2 of the present invention;

[0034] Fig.11 This is a scanning electron microscope image of the brittle fracture etching of Example 3 of the present invention;

[0035] Fig.12 This is a scanning electron microscope image of the brittle fracture etching of Example 4 of the present invention;

[0036] Fig.13 This is a scanning electron microscope image of the brittle fracture etching of Example 5 of the present invention;

[0037] Fig.14 This is a scanning electron microscope image of the brittle fracture etching of Example 6 of the present invention;

[0038] Fig.15 This is a scanning electron microscope image of the brittle fracture etching of Example 7 of the present invention;

[0039] Fig.16 This is a scanning electron microscope image of the brittle fracture etching of Example 8 of the present invention;

[0040] Fig.17 This is a scanning electron microscope image of the brittle fracture etching of Example 9 of the present invention;

[0041] Fig.18 This is a scanning electron microscope image of the brittle fracture etching of Example 10 of the present invention. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Raw materials: PC-1 (1000R); PC-2 (0703); ABS-1 (747S); ABS-2 (757S); 1076 (commercially available); 168 (commercially available); PETS (commercially available). The melt flow rate of PC-1 is 10g / 10min, the melt flow rate of PC-2 is 7g / 10min; the melt flow rate of ABS-1 is 0.5g / 10min, the melt flow rate of ABS-2 is 1.6g / 10min;

[0044] Comparative Example 1

[0045] A PC / ABS alloy, whose raw material formula consists of the following components in parts by weight: 185 parts of PC, 115 parts of ABS, 10760.15 parts of antioxidant, 1680.15 parts of antioxidant, and 0.3 parts of PETS.

[0046] A preparation method of PC / ABS alloy comprises the following steps: drying each raw material, mixing and stirring the raw materials according to the formula, extruding through a twin-screw extruder, cooling, and then passing through a drawbar, introducing into a pelletizer for granulation, and collecting the pellets to obtain the PC / ABS alloy. The twin-screw extrusion temperature is 240°C, and the extruder speed is 300 rpm.

[0047] Comparative Example 2

[0048] A single-component compatibilizer-extended PC / ABS alloy, whose raw material formula consists of the following components in parts by weight: 185 parts of PC, 115 parts of ABS, 2 parts of MBS, 10760.15 parts of antioxidant, 1680.15 parts of antioxidant, and 0.3 parts of PETS.

[0049] A preparation method of a PC / ABS alloy expanded with a single-component compatibilizer comprises the following steps: drying each raw material, mixing and stirring the raw materials according to the formula, extruding through a twin-screw extruder, cooling, passing through a drawbar, introducing into a pelletizer for granulation, and collecting the pellets, which are the PC / ABS alloy expanded with a single-component compatibilizer. The twin-screw extrusion temperature is 240°C, and the extruder speed is 300rpm.

[0050] Comparative Example 3

[0051] A PC / ABS alloy expanded with a single-component compatibilizer is disclosed, which differs from Comparative Example 2 only in that the amount of MBS in the formula of this comparative example is 4 parts, and the other raw materials and steps are the same as those of Comparative Example 2.

[0052] Comparative Example 4

[0053] A single-component compatibilizer-extended PC / ABS alloy, wherein the raw material formula consists of the following components in weight fractions: 185 parts of PC, 115 parts of ABS, 1 part of SAG, 10760.15 parts of antioxidant, 1680.15 parts of antioxidant, and 0.3 parts of PETS.

[0054] A preparation method of a PC / ABS alloy expanded with a single-component compatibilizer comprises the following steps: drying each raw material, mixing and stirring the raw materials according to the formula, extruding through a twin-screw extruder, cooling, passing through a drawbar, introducing into a pelletizer for granulation, and collecting the pellets, which are the PC / ABS alloy expanded with a single-component compatibilizer. The twin-screw extrusion temperature is 240°C, and the extruder speed is 300rpm.

[0055] Comparative Example 5

[0056] A PC / ABS alloy expanded with a single-component compatibilizer is disclosed, which differs from Comparative Example 4 only in that the amount of SAG in the formula of this comparative example is 2 parts, and the other raw materials and steps are the same as those of Comparative Example 4.

[0057] Comparative Example 6

[0058] A PC / ABS alloy expanded with a single-component compatibilizer is different from Comparative Example 4 only in that the amount of SAG in the formula of this comparative example is 4 parts, and the other raw materials and steps are the same as those of Comparative Example 4.

[0059] Comparative Example 7

[0060] A single-component compatibilizer-extended PC / ABS alloy, wherein the raw material formula consists of the following components in parts by weight: 5 parts of PC-18, 5 parts of ABS-11, 2 parts of SBG, 10760.15 parts of antioxidant, 1680.15 parts of antioxidant, and 0.3 parts of PETS.

[0061] A preparation method of a PC / ABS alloy expanded with a single-component compatibilizer comprises the following steps: drying each raw material, mixing and stirring the raw materials according to the formula, extruding through a twin-screw extruder, cooling, passing through a drawbar, introducing into a pelletizer for granulation, and collecting the pellets, which are the PC / ABS alloy expanded with a single-component compatibilizer. The twin-screw extrusion temperature is 240°C, and the extruder speed is 300rpm.

[0062] Comparative Example 8

[0063] A PC / ABS alloy expanded with a single-component compatibilizer is different from Comparative Example 7 only in that the amount of SBG in the formula of this comparative example is 4 parts, and the other raw materials and steps are the same as those of Comparative Example 7.

[0064] Example 1

[0065] A two-component compatibilizer-extended PC / ABS alloy, wherein the raw material formula consists of the following components in parts by weight: 5 parts of PC-18, 5 parts of ABS-11, 1 part of SAG, 1 part of SBG, 10760.15 parts of antioxidant, 1680.15 parts of antioxidant, and 0.3 parts of PETS.

[0066] A preparation method of a two-component compatibilizer-expanded PC / ABS alloy comprises the following steps: drying each raw material, mixing and stirring the raw materials according to the formula, extruding through a twin-screw extruder, cooling, passing through a drawbar, introducing into a pelletizer for granulation, and collecting the pellets, which are the one-component compatibilizer-expanded PC / ABS alloy. The twin-screw extrusion temperature is 240°C, and the extruder speed is 300rpm.

[0067] Example 2

[0068] A two-component compatibilizer-extended PC / ABS alloy, which is different from Example 1 only in that: the formula of this example contains 3 parts of SBG, and the other raw materials and steps are the same as those of Example 1.

[0069] Example 3

[0070] A two-component compatibilizer-extended PC / ABS alloy, which differs from Example 1 only in that: in the formula of this example, SAG is 2 parts, SBG is 2 parts, and the remaining raw materials and steps are the same as those in Example 1.

[0071] Example 4

[0072] A two-component compatibilizer-extended PC / ABS alloy, wherein the raw material formula is the same as that of Example 1. The preparation method thereof is different from that of Example 1 only in that the extruder speed is 450 rpm, and the remaining steps are the same as those of Example 1.

[0073] Example 5

[0074] A two-component compatibilizer-extended PC / ABS alloy, the raw material formula of which is the same as that of Example 1. The difference between the preparation method and that of Example 1 is that the twin-screw extrusion temperature is 250° C., and the other steps are the same as those of Example 1.

[0075] Example 6

[0076] A two-component compatibilizer-extended PC / ABS alloy, the raw material formula of which is the same as that of Example 1. The difference between the preparation method and Example 1 is that the twin-screw extrusion temperature is 260° C., and the other steps are the same as those of Example 1. The viscosity ratio of this example at 260° C. is 1.7.

[0077] Example 7

[0078] A two-component compatibilizer-extended PC / ABS alloy, the raw material formula of which is the same as that of Example 1. The difference between the preparation method and Example 1 is that the twin-screw extrusion temperature is 270° C., and the other steps are the same as those of Example 1.

[0079] Example 8

[0080] A two-component compatibilizer-extended PC / ABS alloy, which differs from Example 1 only in that PC in the formula of this example is PC-2 and ABS is ABS-2. The method differs only in that the temperature of the twin-screw extruder is 260° C. The remaining raw materials and steps are the same as those of Example 1. The viscosity ratio of this example at 260° C. is 3.56.

[0081] Example 9

[0082] A two-component compatibilizer-extended PC / ABS alloy, which differs from Example 1 only in that the ABS used in the formula of this example is ABS-2. The method differs only in that the temperature of the twin-screw extruder is 260° C. The remaining raw materials and steps are the same as those of Example 1. The viscosity ratio of this example at 260° C. is 2.81.

[0083] Example 10

[0084] A two-component compatibilizer-extended PC / ABS alloy, which differs from Example 1 only in that the ABS used in the formula of this example is PC-2. The method differs only in that the temperature of the twin-screw extruder is 260° C. The remaining raw materials and steps are the same as those of Example 1. The viscosity ratio of this example at 260° C. is 2.15.

[0085] The compositions and processing parameters of Comparative Examples 1-8 and Examples 1-10 are shown in the following table:

[0086] Table 1 Composition and processing parameters of Comparative Examples 1-8 and Examples 1-10

[0087]

[0088]

[0089] In the above comparative examples and embodiments, PC is 85 parts, ABS is 15 parts, antioxidant 1076 is 0.15 parts, antioxidant 168 is 0.15 parts, and PETS is 0.3 parts. Before melt blending in a twin-screw extruder, the materials are dried, PC is dried at 110°C for 4 hours, and ABS is dried at 80°C for 4 hours.

[0090] The PC / ABS alloys prepared in the comparative example and the embodiment were subjected to injection molding test strip performance test, and the test steps were as follows:

[0091] The PC / ABS alloy material was first dried at 110°C for 4 hours, and then injection molded. The temperatures of the injection molding section were 260, 260, 260, 260, 270 (nozzle), the injection pressure was 80 MPa, and the injection speed was 65 mm / s. The prepared PC / ABS test specimen (12.80 mm wide and 3.20 mm thick) was placed in an aluminum foil bag and sealed, and tested after being kept at 23°C for 48 hours.

[0092] Tensile strength: The tensile performance test was conducted using the CMT4204 universal testing machine of Shenzhen Sansi Zongheng Company according to the ASTM D638-14 standard, with a tensile speed of 50 mm / min. Tensile modulus: The tensile performance test was conducted using the CMT4204 universal testing machine of Shenzhen Sansi Zongheng Company according to the ASTM D638-14 standard, with a tensile speed of 1 mm / min. Bending performance: The bending performance test was conducted according to the ASTM D790-17 standard, with a die head descending speed of 2 mm / min. Impact performance: The impact performance test was conducted according to the ASTM ISO180-A standard, with a pendulum of 5.5 J. Brittle fracture conditions: After the specimen was immersed in liquid nitrogen for 20 minutes, the specimen was brittlely fractured in liquid nitrogen. Etching conditions: The etching solution prepared with concentrated sulfuric acid (22 ml) and potassium dichromate (1 g) was used, and the etching was conducted at 80°C for 10 minutes. The ABS phase can be etched away, which is used to observe the distribution and size of the ABS phase.

[0093] The above performance test results are shown in the following table:

[0094] Table 2 Mechanical properties and ABS phase dimensions of Comparative Examples 1-8 and Examples 1-10

[0095]

[0096]

[0097] Among them, the brittle fracture surface etching scanning electron microscope images of the injection molded specimens of PC / ABS alloy prepared in the comparative example and the embodiment are as follows: Figure 1-18 shown.

[0098] The results in Tables 1 and 2 show that:

[0099] 1. Comparative Examples 1-3 show that when MBS compatibilizer is added in an amount of 2 parts, the mechanical properties of PC / ABS alloy can be improved, and the size of ABS phase is also significantly reduced; when 4 parts are added, the tensile and bending properties of the alloy decrease, and the impact strength is further improved. This is because MBS contains polybutadiene rubber, which is an ABS-like structure. Therefore, adding 4 parts improves toughness, but is detrimental to tensile and bending properties.

[0100] 2. From comparative examples 1 and 4-6, it can be seen that as the amount of SAG compatibilizer added increases, the distribution of the ABS phase becomes more refined and the size of the ABS phase is significantly reduced. When 2 parts and 4 parts are added, the mechanical properties of the alloy are not much different.

[0101] 3. From Comparative Examples 1, 7-8, it can be seen that when SBG compatibilizer is added in two parts, the mechanical properties of the alloy are significantly improved, and the size of the ABS phase is reduced. Since SBG is also an ABS-like structure, when it is added in four parts, the tensile and bending properties of the alloy are reduced, and the impact properties are improved. In addition, since glycidyl methacrylate has a better effect on PC than methacrylate, it is shown that the effect of SBG compatibilizer is better than that of MBS.

[0102] 4. From Comparative Example 1 and Examples 1-2, it can be seen that the two-component compatibilizer prepared with different matching ratios of SAG and SBG has a better compatibilizing effect. When 1 part of SAG and 1 part of SBG are matched, the mechanical properties of the alloy are the best, and each property is improved in a balanced manner, which is better than the compatibilizing effect of a single-component compatibilizer. In addition, the size of the ABS phase is also finer and the distribution is more uniform.

[0103] 5. It can be seen from Examples 1 and 3 that increasing the screw speed of the twin-screw extruder can promote the refinement of the ABS phase, significantly reduce the size of the ABS phase, and improve the tensile and bending properties of the alloy, but higher shear strength will lead to a decrease in the impact strength of the alloy.

[0104] 6. It can be seen from Examples 1 and 4-7 that the mechanical properties of the PC / ABS alloy are significantly improved by increasing the processing temperature of the twin-screw extruder from 240°C to 260°C, because the increase in processing temperature is more conducive to the dispersion of the ABS phase during the melt blending process. At 260°C, the phase size of ABS is reduced to 0.52 μm. When the temperature is further increased, at 270°C, the mechanical properties of the alloy begin to decline, because the high temperature environment and strong shear force cause the PC / ABS alloy to begin to decompose, which is unfavorable to the alloy performance.

[0105] 7. It can be seen from Examples 5 and 8-10 that as the processing viscosity ratio of PC and ABS at a blending temperature of 260°C approaches 1, the size of the ABS phase becomes finer and the distribution of the ABS phase becomes more uniform, which is manifested in the improvement of mechanical properties on a macro scale.

[0106] In summary, Example 6 has the best mechanical properties, the tensile strength and impact strength of the alloy material are significantly improved, and the ABS phase in the alloy is evenly distributed and the phase domain size is small.

[0107] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A two-component compatibilizer-enhanced PC / ABS alloy, characterized in that: The invention comprises the following components in parts by weight: 60-85 parts of PC, 15-40 parts of ABS, 1-4 parts of SAG, 2-4 parts of SBG, 0.3-0.4 parts of antioxidant and 0.3-0.4 parts of PETS.

2. A two-component compatibilizer-extended PC / ABS alloy according to claim 1, characterized in that: The antioxidant includes antioxidant 1076 and antioxidant 168, and the mass ratio of antioxidant 1076 to antioxidant 168 is 1:

1.

3. A method for preparing a two-component compatibilizer-extended PC / ABS alloy according to claim 1 or 2, characterized in that: The following steps are involved: First, the raw materials are dried, and then the raw materials are fully mixed and stirred according to the formula, extruded by a twin-screw extruder, cooled, and then passed through a draw bar and introduced into a pelletizer for granulation. The collected pellets are the PC / ABS alloy expanded with the two-component compatibilizer.

4. The method for preparing a two-component compatibilizer-extended PC / ABS alloy according to claim 3, characterized in that: The drying is carried out in a blast oven.

5. The method for preparing a two-component compatibilizer-extended PC / ABS alloy according to claim 3, characterized in that: The drying temperature is 80-110° C., and the drying time is 4-6 hours.

6. The method for preparing a two-component compatibilizer-extended PC / ABS alloy according to claim 3, characterized in that: The temperature of the twin-screw extruder is 240-270°C.

7. The method for preparing a two-component compatibilizer-extended PC / ABS alloy according to claim 3, characterized in that: The rotation speed of the twin-screw extruder is 300-450 rpm.

8. The method for preparing a two-component compatibilizer-extended PC / ABS alloy according to claim 3, characterized in that: The pelletizer has a rotation speed of 400-700 rpm.

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