A polycarbonate composite material and a method for producing the same

Abstract

The application relates to a polycarbonate composite material and a preparation method thereof, and belongs to the technical field of high polymer materials; the composite material is composed of the following components in parts by weight: polycarbonate 70-80 parts, ABS resin 20-30 parts, a compatilizer 3.2-4.5 parts, a lubricant 0.6-0.8 parts, a modified light stabilizer 0.42-0.55 parts and an antioxidant 0.13-0.18 parts; the modified light stabilizer has a specific organic silicon-ester group alternating chain structure, a hindered amine group is introduced on the chain, is different from a conventional hindered amine light stabilizer, does not passively protect through spectral absorption or free radical capture, but actively and accurately acts on a micro-weak phase interface of the PC / ABS composite material, effectively relieves light aging of the phase interface, simultaneously forms a mechanical gradient transition zone at the phase interface, and effectively improves the overall performance of the composite system.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of high polymer materials, and particularly relates to a polycarbonate composite material and a preparation method thereof. BACKGROUND

[0002] Since the industrialization of polycarbonate (PC), it has been widely used in various fields due to its excellent impact strength, heat resistance, transparency and dimensional stability. However, PC itself also has some inherent defects, such as poor processing fluidity, easy stress cracking, and sensitivity to notches, which to some extent limit its more extensive application.

[0003] In order to improve the application performance of polycarbonate, composite modification technology is widely used in the prior art, and a composite material with more balanced performance is obtained by blending with other resins. Among them, the composite system (PC / ABS) formed by PC and ABS (acrylonitrile-butadiene-styrene copolymer) is one of the most widely used alloys because it can significantly improve the processability of PC and has excellent toughness and economy. The composite material successfully combines the rigidity, heat resistance of PC and the processing fluidity and toughness of ABS, and becomes an ideal material for automotive interior parts, electronic and electrical housings and other products.

[0004] However, the application of PC / ABS composite material in outdoor or long-term light environment faces a major challenge - insufficient light aging resistance. The root cause of this defect lies in the complex phase morphology structure and the photochemical weakness of the two phases. In a typical PC / ABS system, PC is usually the continuous phase, and ABS exists in the form of dispersed phase. First, as the continuous phase, the carbonate bond and benzene ring in the molecular chain of PC are sensitive to ultraviolet light, which will cause photo-induced Fries rearrangement and chain scission under ultraviolet light, resulting in a decrease in molecular weight and yellowing. More seriously, the internal polybutadiene rubber phase of ABS as a dispersed phase contains a large number of unsaturated double bonds, which are preferential sites for ultraviolet attack and are prone to oxidative chain scission, resulting in molecular chain scission and crosslinking.

[0005] The degradation mechanism of the above two single materials will produce a fatal "synergistic deterioration" effect in the composite system. During the light aging process, the ABS dispersed phase particles first undergo volume shrinkage and pulverization due to the degradation of their rubber phase, and thus the interfacial adhesion between the PC continuous phase and the ABS dispersed phase decreases sharply. At this time, the original small phase interface will evolve into macroscopic microcracks and defects. These microcracks and defects not only directly become stress concentration points, leading to a sharp drop in mechanical properties (especially impact toughness), but more importantly, they provide channels for the deep penetration of oxygen, moisture and ultraviolet light, greatly increasing the internal specific surface area of the material, thereby accelerating the photo-oxidative aging process of the internal PC phase and ABS phase, forming a vicious cycle of "interface failure → accelerated aging → more serious interface failure".

[0006] In the prior art, in order to improve the light resistance of PC / ABS, the method of adding light stabilizers is generally used for blending modification. This method can delay yellowing to a certain extent, but has obvious limitations. First, the compatibility and dispersibility of traditional small molecule light stabilizers with PC and ABS are limited, and the simple blending introduction increases the complexity of the phase structure of the composite system, and it is difficult to achieve uniform distribution on a microscale. Similar to the mechanism of uneven distribution of ABS dispersed phase in the matrix, these light stabilizers are also prone to segregation, resulting in insufficient concentration at the PC / ABS phase interface that needs to be protected most, and unable to effectively inhibit the start of interfacial aging. Secondly, these small molecule additives generally have migration and volatilization problems. Under the long-term action of light and heat, they will migrate from the interior of the matrix to the surface and be lost, resulting in rapid deterioration of the anti-photoaging performance over time and inability to provide long-term protection. Therefore, developing a long-acting light stabilizer that can specifically anchor to the PC / ABS phase interface and is not prone to migration is the key to fundamentally solving the interfacial aging problem of the composite material. SUMMARY

[0007] In order to solve the technical problems mentioned in the background art, the purpose of the present application is to provide a polycarbonate composite material and a preparation method thereof.

[0008] The purpose of the present application can be achieved by the following technical solutions:

[0009] In the first aspect, the present application provides a modified light stabilizer, and the specific preparation method is as follows:

[0010] Step 1: Under a dry nitrogen atmosphere, double-end hydroxyl silicone oil and anhydrous tetrahydrofuran are added to a reactor and mixed uniformly, an ice water bath is used to control the temperature to 0-10℃, chloroacetyl chloride is slowly added and stirred for 1.5-2h, then the temperature is raised to 40-55℃ and the reaction is continued for 3-4h, after the reaction is completed, the reaction system is cooled to room temperature, the reaction solution is washed with saturated sodium bicarbonate solution and deionized water in sequence until it is neutral, then the organic layer is separated and dried with anhydrous magnesium sulfate, finally the tetrahydrofuran is quickly distilled off under reduced pressure to obtain a chlorinated silicone oil matrix;

[0011] Step 2: Triethylamine and toluene are pre-mixed and added to the reactor, then the chlorinated silicone oil matrix and tetramethylpiperidamine are mixed and stirred, the temperature is raised to 70-90℃ under a nitrogen atmosphere, and the reaction is continued for 8-12h, after the reaction is completed, the mixture is filtered, the toluene is removed by rotary evaporation under reduced pressure, and then the mixture is cooled to room temperature, washed with deionized water and dried to obtain the modified light stabilizer.

[0012] In the preparation process of the chlorinated silicone oil matrix as described above, the molar ratio of the hydroxyl content of the double-end hydroxyl silicone oil to chloroacetyl chloride is 1:1.2-1.5; wherein the molecular weight of the double-end hydroxyl silicone oil is preferably 1000-3000.

[0013] In the preparation of the modified light stabilizer as above, the molar ratio of the chlorine content of the chlorinated silicone oil matrix and the tetramethylpiperidine amine is 2:1, and the amount of triethylamine is 9.5-14wt% of the two.

[0014] In the second aspect, the present application provides a polycarbonate composite material, and the specific components are as follows:

[0015] Polycarbonate 70-80 parts

[0016] ABS resin 20-30 parts

[0017] Compatibilizer 3.2-4.5 parts

[0018] Lubricant 0.6-0.8 parts

[0019] Modified light stabilizer 0.42-0.55 parts

[0020] Antioxidant 0.13-0.18 parts

[0021] Preferably, the compatibilizer is a styrene-maleic anhydride copolymer.

[0022] Preferably, the lubricant is pentaerythritol stearate.

[0023] Preferably, the antioxidant is a composite of antioxidant 1010 and antioxidant 168.

[0024] The preparation method of the polycarbonate composite material specifically comprises the following processes:

[0025] Process a, batching: after the components are metered, they are added to a high-speed mixer, mixed at 1200-1500rpm for 6-10min, and the components are uniformly dispersed to prepare a premix;

[0026] Process b, mixing: the premix is added to a double-screw extruder through a main feeder, and the temperature of each section of the double-screw extruder is set as follows: zone 1 220-230℃, zone 2 230-240℃, zone 3 240-250℃, zone 4 240-250℃, zone 5 250-255℃, and the die head 245-250℃, the premix is melted and plasticized, and then extruded and granulated, to obtain the polycarbonate composite material.

[0027] The beneficial effects of the present application are:

[0028] The application successfully synthesizes a block modified light stabilizer with compatibility, stability and toughening functions through molecular structure design, and introduces it into the PC / ABS composite system, which achieves a technical effect beyond expectation. The core advantage of the stabilizer is that it does not passively protect through spectral absorption or free radical capture, but actively and accurately acts on the micro weak link of PC / ABS composite material, i.e. the phase interface. Specifically:

[0029] The modified light stabilizer is composed of flexible organosilicon segments and rigid ester structures containing tetramethylpiperidine rings, which is essentially a linear block macromolecule with rigid-flexible balance. This unique structure makes it have an intelligent distribution tendency in PC / ABS two phases: the ester group structure has a polar similarity and interaction with the carbonate group of PC continuous phase, playing an "anchoring" role; and the hydrophobic and flexible organosilicon segment has good affinity with the rubber phase in the ABS dispersed phase, and tends to disperse in it. This "amphiphilic" property drives a large number of stabilizer molecules to spontaneously enrich and span across the phase interface of PC and ABS, forming countless "molecular bridges" connecting the two phases at the microscale.

[0030] This "bridge" effect brings multiple benefits. First, it significantly improves the dispersion uniformity of the ABS dispersed phase in the PC matrix, reduces the interfacial tension, and obtains a more stable and uniform initial phase morphology from the physical structure. Second, and most importantly, it enables the efficient tetramethylpiperidine amine hindered amine structure to be precisely and highly concentrated in the phase interface region where aging initiation and deterioration are most likely to occur, achieving "targeted protection" and effectively interrupting the free radical chain reaction at the interface, thereby fundamentally curbing the vicious cycle caused by the decrease in interfacial adhesion due to ABS phase degradation. In addition, the stabilizer itself is a macromolecular polymer, and the entanglement of the molecular chain makes it extremely difficult to migrate and volatilize, which is a common problem with small molecule stabilizers, ensuring the long-term and stability of the protection effect.

[0031] Moreover, the rigid-flexible chain structure of the stabilizer is similar to the chain segment characteristics of ABS, and when it is distributed at the phase interface, it can form a perfect mechanical gradient transition zone between the rigid environment of PC and the tough environment of ABS, acting like an "elastic glue". This structure can effectively transfer and disperse stress when the material is impacted, preventing the initiation and propagation of microcracks at the interface. Therefore, the application not only chemically endows the composite material with super strong anti-photoaging ability, but also physically strengthens its microstructure, so that the composite material can still maintain excellent mechanical strength and toughness after long-term photo-thermal aging, successfully solving the problem of accelerated aging between phases that traditional technologies cannot overcome, and providing a reliable guarantee for the long-term safe application of PC / ABS composites in high-end outdoor fields. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0033] Embodiment 1, preparation of polycarbonate composite material, as follows:

[0034] I. Preparation of modified light stabilizer

[0035] Step 1: Take a four-necked flask loaded with a stirrer, a thermometer, a reflux condenser and a nitrogen inlet tube, protect it by introducing dry nitrogen, add double-end hydroxyl silicone oil and anhydrous tetrahydrofuran and stir to mix uniformly, control the temperature to be 10°C by ice water bath, slowly add chloroacetyl chloride and stir for 2h, then increase the temperature to 55°C and continue to react for 4h. In this step, the double-end hydroxyl silicone oil is IOTA2110-2500 type silicone oil raw material, the molar ratio of the hydroxyl content of the double-end hydroxyl silicone oil to the chloroacetyl chloride is 1:1.5, and the amount of anhydrous tetrahydrofuran is 2 times the total weight of the two. After the reaction is completed, cool the reaction system to room temperature, wash the reaction liquid with saturated sodium bicarbonate solution and deionized water in sequence until it is neutral, then separate the organic layer, dry it with anhydrous magnesium sulfate, and finally remove tetrahydrofuran by rapid evaporation under reduced pressure to obtain a chlorinated silicone oil matrix.

[0036] Step 2: In another dry four-necked flask, add a pre-mixture of triethylamine and toluene, then add the chlorinated silicone oil matrix and tetramethylpiperidinamine, protect it by introducing nitrogen, increase the temperature to 90°C and stir for 12h. In this step, the molar ratio of the chlorine content of the chlorinated silicone oil matrix to the tetramethylpiperidinamine is 2:1, the amount of triethylamine is 14wt% of the two, and the amount of toluene is 1.5 times the total weight of the two. After the reaction is completed, filter, remove toluene by rotary evaporation under reduced pressure, wash and dry after cooling to room temperature, and obtain the modified light stabilizer.

[0037] II. Preparation of polycarbonate composite material

[0038] Process a, batching: according to weight parts, 80 parts of polycarbonate, Makrolon®2405 type resin raw material is used; 20 parts of ABS resin, POLYLAC® PA-757 type resin raw material is used; 4.5 parts of compatibilizer, SMA2025 type styrene maleic anhydride copolymer is used; 0.8 parts of lubricant, industrial grade pentaerythritol stearate is used; 0.55 parts of modified light stabilizer, which is self-made in this embodiment; 0.18 parts of antioxidant, antioxidant 1010 and antioxidant 168 are compounded according to equal weight ratio. After the components are weighed and added to a high-speed mixer, mix for 6min at 1500rpm to ensure uniform dispersion of the components, and prepare a pre-mixture.

[0039] Process b, mixing: the above premix is added into the twin-screw extruder through the main feeder, and the temperature of each section of the twin-screw extruder is set as follows: Zone 1 230℃, Zone 2 240℃, Zone 3 250℃, Zone 4 250℃, Zone 5 255℃, and the die head 250℃. After the premix is melted and plasticized, it is extruded and granulated to obtain the polycarbonate composite material.

[0040] Example 2, preparation of polycarbonate composite material, as follows:

[0041] I. Preparation of modified light stabilizer

[0042] Step 1: Take a four-necked flask equipped with a stirrer, thermometer, reflux condenser and nitrogen inlet tube, and protect it by introducing dry nitrogen. Add double-end hydroxyl silicone oil and anhydrous tetrahydrofuran and stir to mix uniformly. Control the temperature at 0℃ by ice water bath, and slowly add chloroacetyl chloride and stir for 1.5h. Then, increase the temperature to 40℃ and continue to react for 3h. The molar ratio of the hydroxyl content of the double-end hydroxyl silicone oil to the chloroacetyl chloride is 1:1.2, and the amount of anhydrous tetrahydrofuran is 1.6 times the total weight of the two. After the reaction is completed, cool the reaction system to room temperature, and wash the reaction liquid with saturated sodium bicarbonate solution and deionized water in sequence until it is neutral. Then, separate the organic layer and dry it with anhydrous magnesium sulfate. Finally, remove the tetrahydrofuran by rapid evaporation under reduced pressure to obtain a chlorinated silicone oil matrix.

[0043] Step 2: In another dry four-necked flask, add triethylamine and toluene, and then add the chlorinated silicone oil matrix and tetramethylpiperidamine. Protect it by introducing nitrogen, and stir to react at 70℃ for 8h. The molar ratio of the chlorine content of the chlorinated silicone oil matrix to the tetramethylpiperidamine is 2:1, the amount of triethylamine is 9.5wt% of the two, and the amount of toluene is 1.3 times the total weight of the two. After the reaction is completed, filter, remove the toluene by rotary evaporation under reduced pressure, and dry after washing with deionized water to obtain the modified light stabilizer.

[0044] II. Preparation of polycarbonate composite material

[0045] Process a, batching: according to the weight parts, 80 parts of polycarbonate, using Makrolon®2405 type resin raw material; 25 parts of ABS resin, using POLYLAC® PA-757 type resin raw material; 3.2 parts of compatibilizer, using SMA2025 type styrene maleic anhydride copolymer; 0.6 parts of lubricant, using industrial grade pentaerythritol stearate; 0.42 parts of modified light stabilizer, self-made in this example; 0.13 parts of antioxidant, using antioxidant 1010 and antioxidant 168 in equal weight ratio. After the components are weighed and added to the high-speed mixer, mix for 10 min at 1200 rpm to ensure uniform dispersion of the components, and prepare the premix.

[0046] Process b, mixing: the above premix is added into a twin-screw extruder through a main feeder, and the temperature of each section of the twin-screw extruder is set as follows: Zone 1 220℃, Zone 2 230℃, Zone 3 240℃, Zone 4 240℃, Zone 5 250℃, and the head 245℃. The premix is extruded and granulated after being melted and plasticized, and the polycarbonate composite material is obtained.

[0047] Example 3, preparation of polycarbonate composite material, as follows:

[0048] I. Preparation of modified light stabilizer

[0049] Step 1: Take a four-necked flask equipped with a stirrer, a thermometer, a reflux condenser and a nitrogen inlet tube, and protect it by introducing dry nitrogen. Add double-end hydroxyl silicone oil and anhydrous tetrahydrofuran and stir to mix evenly. Control the temperature at 5℃ with an ice water bath, and slowly add chloroacetyl chloride and stir for 2h. Then increase the temperature to 45℃ and continue to react for 3.7h. The molar ratio of the hydroxyl content of the double-end hydroxyl silicone oil to the chloroacetyl chloride is 1:1.4, and the amount of anhydrous tetrahydrofuran is 1.8 times the total weight of the two. After the reaction is completed, cool the reaction system to room temperature, and wash the reaction liquid with saturated sodium bicarbonate solution and deionized water in sequence until it is neutral. Then separate the organic layer and dry it with anhydrous magnesium sulfate. Finally, remove the tetrahydrofuran by rapid evaporation under reduced pressure to obtain a chlorinated silicone oil matrix.

[0050] Step 2: In another dry four-necked flask, add triethylamine and toluene, and then add the chlorinated silicone oil matrix and tetramethylpiperidinamine. Protect it by introducing nitrogen, and stir to react at 80℃ for 10h. The molar ratio of the chlorine content of the chlorinated silicone oil matrix to the tetramethylpiperidinamine is 2:1, the amount of triethylamine is 11.5wt% of the two, and the amount of toluene is 1.4 times the total weight of the two. After the reaction is completed, filter, remove the toluene by rotary evaporation under reduced pressure, and dry after cooling to room temperature. The modified light stabilizer is obtained.

[0051] II. Preparation of polycarbonate composite material

[0052] Process a, batching: taking according to weight parts, polycarbonate 70 parts, using Makrolon®2405 type resin raw material; ABS resin 30 parts, using POLYLAC® PA-757 type resin raw material; compatibilizer 3.9 parts, using SMA2025 type styrene maleic anhydride copolymer; lubricant 0.7 parts, using industrial grade pentaerythritol stearate; modified light stabilizer 0.45 parts, self-made by this example; antioxidant 0.15 parts, using antioxidant 1010 and antioxidant 168 in equal weight ratio. After the components are weighed and added to the high mixer, mix at 1200 rpm for 10 min to ensure uniform dispersion of the components and prepare the premix.

[0053] Process b, mixing: the above premix is added to the twin screw extruder through the main feeder, and the temperature of each section of the twin screw extruder is set as follows: zone 1 230℃, zone 2 235℃, zone 3 245℃, zone 4 250℃, zone 5 250℃, and the die head 245℃. The premix is extruded and granulated after melting and plasticizing, and the polycarbonate composite material is obtained.

[0054] Example 4, preparation of polycarbonate composite material, as follows:

[0055] I. Preparation of modified light stabilizer

[0056] Step 1: Take a four-necked flask equipped with a stirrer, thermometer, reflux condenser and nitrogen inlet tube, protect it by introducing dry nitrogen, add double-end hydroxyl silicone oil and anhydrous tetrahydrofuran and stir until uniform, control the temperature at 5℃ with ice water bath, slowly add chloroacetyl chloride and stir for 1.5h, then heat to 50℃ and continue to react for 3.5h. The double-end hydroxyl silicone oil is IOTA2110-2000 type silicone oil raw material, the molar ratio of hydroxyl content of double-end hydroxyl silicone oil to chloroacetyl chloride is 1:1.3, and the amount of anhydrous tetrahydrofuran is 2 times the total weight of the two. After the reaction is completed, cool the reaction system to room temperature, wash the reaction liquid with saturated sodium bicarbonate solution and deionized water in sequence until it is neutral, then separate the organic layer and dry it with anhydrous magnesium sulfate, and finally remove the tetrahydrofuran by rapid evaporation under reduced pressure to obtain a chlorinated silicone oil matrix.

[0057] Step 2: In another dry four-necked flask, add triethylamine and toluene, then add chlorinated silicone oil matrix and tetramethylpiperidamine, protect it by introducing nitrogen, heat to 85℃ and stir for 9h. The molar ratio of the chlorine content of the chlorinated silicone oil matrix to the tetramethylpiperidamine is 2:1, the amount of triethylamine is 13wt% of the two, and the amount of toluene is 1.4 times the total weight of the two. After the reaction is completed, filter, remove the toluene by rotary evaporation under reduced pressure, wash and dry with deionized water after cooling to room temperature, and obtain the modified light stabilizer.

[0058] II. Preparation of polycarbonate composite material

[0059] Process a, batching: the components are weighed and added to a high-speed mixer, mixed at 1500 rpm for 8 min to ensure uniform dispersion, and prepared into a premix.

[0060] Process b, mixing: the above premix is added to a twin-screw extruder through a main feeder, and the temperature of each section of the twin-screw extruder is set as follows: zone 1 230°C, zone 2 240°C, zone 3 245°C, zone 4 250°C, zone 5 255°C, and the die head 250°C. The premix is extruded and pelletized after melting and plasticizing, and the polycarbonate composite material is obtained.

[0061] Comparative Example 1: the modified light stabilizer is replaced with 0.35 parts of 201 silicone oil and 0.15 parts of light stabilizer 770, and the rest of the implementation process is the same as that of Example 4.

[0062] Comparative Example 2: the amount of light stabilizer 770 is increased to 0.5 parts, and the rest of the implementation process is the same as that of Comparative Example 1.

[0063] The composite material prepared above is injection molded into a sample bar, and the tensile properties are tested according to the ISO 527-2:2025 standard; the impact properties are tested according to the ISO 179-1:2023 standard; the accelerated light aging is performed according to the ISO 4892-3:2016 standard, using a UVB-313 lamp, and the cycle conditions are: 60°C ultraviolet light for 8 hours, 50°C condensation for 4 hours, and the cycle period is 720h; the yellowing index is calculated according to the ASTM E313-20 standard, the impact strength after aging is tested and the retention rate is calculated; the specific test results are shown in Table 1:

[0064] Table 1

[0065]

[0066] From the comparison of the test data in Table 1, it can be seen that the addition of the modified light stabilizer and the traditional light stabilizer has little effect on the initial performance of the composite material. After accelerated light aging, the yellowing index and impact strength retention rate of the examples are significantly better than those of the comparative examples, showing extremely excellent light aging resistance.

[0067] In the description, references to "one embodiment," "an example," "certain examples" etc. mean that the particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of an item in various examples or embodiments is not necessarily indicative of a frequency of occurrence in the various examples or embodiments. Moreover, descriptions of well-known methods associated are omitted so as not to obscure the disclosure.

[0068] The foregoing merely illustrates the principles of the application. Various modifications and adaptations will occur to those skilled in the art after consideration of the preceding description. All such modifications and adaptations employing the principles of the application are intended to be within the scope of the claims.

Claims

1. A polycarbonate composite material, characterized by, The specific weight parts of components are: polycarbonate 70-80 parts, ABS resin 20-30 parts, compatibilizer 3.2-4.5 parts, lubricant 0.6-0.8 parts, modified light stabilizer 0.42-0.55 parts and antioxidant 0.13-0.18 parts; The preparation method of the modified light stabilizer is: Step 1: under a dry nitrogen atmosphere, mix the double-end hydroxyl silicone oil and anhydrous tetrahydrofuran, control the temperature to be 0-10℃, slowly add chloroacetyl chloride to react for 1.5-2h, then control the temperature to be 40-55℃ and continue to react for 3-4h to prepare a chlorinated silicone oil matrix, wherein the molar ratio of the hydroxyl content of the double-end hydroxyl silicone oil to the chloroacetyl chloride is 1:1.2-1.5, and the molecular weight of the double-end hydroxyl silicone oil is 1000-3000; Step 2: premix triethylamine and toluene, then add the chlorinated silicone oil matrix and tetramethylpiperidinamine, control the temperature to be 70-90℃ under a nitrogen atmosphere to react for 8-12h to prepare the modified light stabilizer, wherein the molar ratio of the chlorine content of the chlorinated silicone oil matrix to the tetramethylpiperidinamine is 2:1, and the amount of triethylamine is 9.5-14wt% of the two.

2. The polycarbonate composite of claim 1, wherein, The compatibilizer is a styrene-maleic anhydride copolymer.

3. The polycarbonate composite of claim 1, wherein, The lubricant is pentaerythritol stearate.

4. The polycarbonate composite of claim 1, wherein, The antioxidant is a composite of antioxidant 1010 and antioxidant 168.

5. A method of producing a polycarbonate composite material according to any one of claims 1 to 4, characterized in that, Specifically includes the following processes: Process a, batching: after the components are measured, they are stirred and mixed uniformly to prepare a premix; Process b, mixing: the premix is plasticized and extruded, the temperature zones in the extrusion process are set as: zone 1 220-230℃, zone 2 230-240℃, zone 3 240-250℃, zone 4 240-250℃, zone 5 250-255℃, and the die head 245-250℃, after extrusion, granulation is performed to obtain the polycarbonate composite material.

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