An ultraviolet aging resistant polycarbonate modified material and application thereof

Abstract

The application discloses an anti-ultraviolet aging polycarbonate modified material and application thereof, and belongs to the technical field of polymer material modification. The material comprises synergistically modified polycarbonate, an organic small-molecule functional regulator, an antioxidant, a light stabilizer, a lubricating dispersant and an inorganic filler, wherein the synergistically modified polycarbonate is constructed into a multiple synergistic network by introducing a borate dynamic covalent structure, a Schiff base structure and a rare earth coordination structure, and the organic small-molecule functional regulator is p-hydroxybenzophenone. The preparation method comprises preparation of the synergistically modified polycarbonate and a subsequent melt blending and extrusion process. Through the technical scheme, the synergistic effect of ultraviolet absorption, energy transfer and free radical inhibition is realized, the yellowing degree of the material is significantly reduced, the mechanical property retention rate and the optical stability are improved, and the material is suitable for the fields of automobile transparent parts, outdoor optical materials and electronic and electrical shell.

Description

Technical Field

[0001] This invention belongs to the field of polymer material modification technology, specifically relating to an anti-UV aging polycarbonate modified material and its application. Background Technology

[0002] Polycarbonate is widely used in automotive headlight covers, sunroofs, optical translucent panels, and electronic housings due to its excellent impact strength, heat resistance, and optical transparency. However, the polycarbonate backbone contains carbonate structures, which are prone to photo-oxidation under long-term ultraviolet light irradiation. This generates free radicals and triggers molecular chain breakage and rearrangement, leading to yellowing, decreased light transmittance, surface cracking, and a significant decline in mechanical properties, thus severely affecting its service life.

[0003] Existing technologies typically modify polycarbonate by adding UV absorbers, hindered amine light stabilizers, and antioxidants. However, these methods mainly rely on physical blending, and small-molecule additives are prone to migration or volatilization during processing or long-term use, leading to a gradual decline in UV resistance. Furthermore, the lack of effective synergistic effects among the various additives makes it difficult to simultaneously achieve multiple stabilization mechanisms such as UV absorption, free radical capture, and energy dissipation.

[0004] Some modification techniques introduce inorganic nanofillers to improve weather resistance, but due to poor interfacial compatibility, this can easily lead to increased haze and decreased transparency. Furthermore, the fillers are prone to agglomeration, which in turn affects the material's mechanical properties and processing stability. Therefore, developing a polycarbonate-modified material with a stable structure and the ability to achieve multiple synergistic protections is of great significance for improving its UV aging resistance and long-term stability. Summary of the Invention

[0005] To overcome the problems of easy photo-oxidative degradation of polycarbonate under ultraviolet light, easy migration of additives, and insufficient synergistic stabilizing effect in the aforementioned background technology, the present invention aims to provide a UV-resistant modified polycarbonate material and its application. The present invention employs a synergistic modified polycarbonate system, constructing a dynamic covalent bond and coordination network structure with polycarbonate, 2,7-dihydroxypyrene, 4-formylphenylboronic acid, and 1,10-o-phenanthroline. Simultaneously, p-hydroxybenzophenone is introduced as an organic small molecule functional regulator, and combined with antioxidants, light stabilizers, lubricating dispersants, and inorganic fillers, multiple synergistic stabilizing effects are achieved. The present invention significantly improves the UV resistance of polycarbonate while maintaining mechanical properties and optical stability.

[0006] The objective of this invention can be achieved through the following technical solutions: A UV-resistant modified polycarbonate material, comprising the following raw materials in parts by weight: 80-120 parts of synergistic modified polycarbonate; 1-10 parts of organic small molecule functional regulator; 0.5-5 parts of antioxidant; 0.5-6 parts of light stabilizer; 0.3-3 parts of lubricant and dispersant; and 0.5-20 parts of inorganic filler. The synergistic modified polycarbonate is formed by synergistic modification of polycarbonate with 2,7-dihydroxypyrene, 4-formylphenylboronic acid, and 1,10-o-phenanthroline through dynamic covalent bonding of borate esters, Schiff base condensation reaction, and rare earth ion coordination crosslinking. The organic small molecule functional regulator is p-hydroxybenzophenone.

[0007] Optionally, the synergistically modified polycarbonate comprises the following raw materials in parts by weight: 80-120 parts polycarbonate; 1-8 parts 2,7-dihydroxypyrene; 0.5-5 parts 4-formylphenylboronic acid; 0.5-6 parts 1,10-o-phenanthroline; 0.2-3 parts cerium chloride; and 2-12 parts tetraethoxysilane.

[0008] Optionally, the preparation method of the synergistically modified polycarbonate includes the following steps: (1) 2,7-dihydroxypyrene, 4-formylphenylboronic acid and 1,10-o-phenanthroline were mixed and dispersed in an organic solvent, and the reaction was stirred to obtain a precursor reaction system; (2) Add cerium chloride and tetraethoxysilane to the precursor reaction system and continue the reaction to form a multi-coordinated silicon-oxygen network structure; (3) Polycarbonate was added to a multi-coordination-siloxane network structure for melt blending to obtain synergistically modified polycarbonate.

[0009] Optionally, the reaction conditions in step (1) are to stir the reaction at 50-80°C for 1-4 hours and at a stirring speed of 300-800 rpm.

[0010] Optionally, the reaction conditions for step (2) are: reaction at 60–100°C for 2–6 h, and pH 5–7.

[0011] Optionally, the reaction conditions in step (3) are a melt blending temperature of 220-260°C, a screw speed of 80-150 rpm, and a residence time of 5-15 min.

[0012] Optionally, the antioxidant is a mixture of hindered phenolic antioxidants and phosphite antioxidants in a mass ratio of 1:0.5 to 1:2; the light stabilizer is a mixture of hindered amine light stabilizers and ultraviolet absorbers in a mass ratio of 1:0.5 to 1:3; the lubricating dispersant is a mixture of polyethylene wax and zinc stearate in a mass ratio of 1:0.5 to 1:2; and the inorganic filler is a mixture of nano-silica and talc in a mass ratio of 1:0.5 to 1:3.

[0013] Optionally, a method for preparing a UV-resistant modified polycarbonate material includes the following steps: S1, premix the synergistically modified polycarbonate with the organic small molecule functional regulator to obtain a uniform mixture; S2, antioxidants, light stabilizers, lubricating dispersants and inorganic fillers are added to the uniform mixture, and the mixture is mixed and dispersed in a high-speed mixer to obtain the material; S3, the material is added to a twin-screw extruder for melt extrusion granulation to obtain UV-resistant polycarbonate modified material.

[0014] Optionally, the reaction conditions for step S1 are: premixing at 40–80°C for 10–30 min and rotating at 200–600 rpm; the reaction conditions for step S2 are: mixing and dispersing at 60–100°C for 15–40 min and rotating at 500–1200 rpm; and the reaction conditions for step S3 are: melt extrusion temperature of 230–270°C, screw speed of 100–200 rpm, and residence time of 5–12 min.

[0015] Optionally, an anti-UV aging polycarbonate modified material is used in automotive lamp covers, automotive sunroof transparent panels, outdoor optical light-transmitting panels, and transparent housings for electronic appliances.

[0016] The beneficial effects of this invention are: This invention constructs a multi-synergistic network structure composed of dynamic covalent bonds of borate esters, Schiff base structures, and rare earth coordination crosslinking. This structure enables stable energy dissipation and free radical capture channels within polycarbonate. The borate ester bonds provide dynamic rearrangement capabilities to alleviate structural stress caused by photodegradation, the Schiff base structure enhances UV absorption and intermolecular interactions, and the rare earth coordination structure effectively promotes the conversion of UV energy into thermal energy and inhibits free radical chain reactions. Simultaneously, p-hydroxybenzophenone is introduced as an organic small molecule functional regulator to further enhance UV absorption and interfacial hydrogen bonding. This achieves a multi-synergistic effect of UV absorption, energy transfer, and structural stability, significantly reducing the degree of yellowing and improving the retention of mechanical properties and optical stability under long-term light exposure. Attached Figure Description

[0017] The invention will now be further described with reference to the accompanying drawings.

[0018] Figure 1 This is a comparison of the infrared spectra of polycarbonate and synergistically modified polycarbonate. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments. However, the present invention is not limited to the following embodiments. Equivalent adjustments made without departing from the spirit and essence of the present invention should also be considered to fall within the protection scope of the present invention.

[0020] Example 1: The purpose of this example is to verify the basic UV aging resistance of the material when the components and reaction conditions are at a low range.

[0021] S1, 80 parts of polycarbonate, 1 part of 2,7-dihydroxypyrene, 0.5 parts of 4-formylphenylboronic acid, and 0.5 parts of 1,10-o-phenanthroline were added to an organic solvent and reacted at 50°C and 300 rpm for 1 h to obtain a precursor reaction system; then 0.2 parts of cerium chloride and 2 parts of tetraethoxysilane were added and reacted at 60°C and pH 5 for 2 h to form a multi-coordinated-siloxane network structure; then the mixture was melt-blended with the system at 220°C, 80 rpm screw speed, and 5 min residence time to obtain synergistically modified polycarbonate; S2, the above-mentioned synergistically modified polycarbonate and 1 part of p-hydroxybenzophenone were premixed at 40°C and 200 rpm for 10 min to obtain a uniform mixture; then 0.5 parts of antioxidant, 0.5 parts of light stabilizer, 0.3 parts of lubricating dispersant and 0.5 parts of inorganic filler were added, and the mixture was mixed and dispersed at 60°C and 500 rpm for 15 min to obtain the material; S3. The material is added to a twin-screw extruder and melt-extruded and granulated at 230°C, screw speed of 100 rpm and residence time of 5 min to obtain UV-resistant polycarbonate modified material.

[0022] Example 2: The purpose of this example is to verify that the overall performance of the material is optimal when the components and reaction conditions are within a moderate range.

[0023] S1, 100 parts of polycarbonate, 4 parts of 2,7-dihydroxypyrene, 2 parts of 4-formylphenylboronic acid and 3 parts of 1,10-o-phenanthroline were added to an organic solvent and reacted at 65°C and 500 rpm for 2.5 h to obtain a precursor reaction system; then 1.5 parts of cerium chloride and 7 parts of tetraethoxysilane were added and reacted at 80°C and pH 6 for 4 h to form a multi-coordinated-siloxane network structure; then melt-blended at 240°C, 120 rpm screw speed and 10 min residence time to obtain synergistically modified polycarbonate; Figure 1 Medium-modified pre-polycarbonate at 1775cm -1 It exhibits a distinct C=O characteristic absorption peak at 1250–1180 cm⁻¹, and also shows a peak at 1250–1180 cm⁻¹. -1 The presence of a COC stretching vibration peak at 3400 cm⁻¹ indicates that its main chain structure is intact; after modification, the peak is observed at 3400 cm⁻¹. -1A significantly enhanced OH absorption peak appears nearby, in the range of 1690–1720 cm⁻¹. -1 The appearance of new characteristic peaks indicates the introduction of a structure containing hydroxyl groups and Schiff bases; simultaneously, at 1100 cm⁻¹... -1 The significantly enhanced absorption peaks of the nearby Si-O-Si region indicate the formation of a silicon-oxygen network structure, particularly in the 500–700 cm⁻¹ range. -1 The appearance of new absorption peaks indicates the presence of rare earth coordination structures; in summary, the modified material successfully constructed multiple synergistic structures, achieving structural strengthening and improved UV stability. S2, the above-mentioned synergistically modified polycarbonate and 5 parts of p-hydroxybenzophenone were premixed at 60°C and 400 rpm for 20 min to obtain a uniform mixture; then 2 parts of antioxidant, 3 parts of light stabilizer, 1.5 parts of lubricating dispersant and 10 parts of inorganic filler were added, and the mixture was mixed and dispersed at 80°C and 800 rpm for 25 min to obtain the material. S3. The material is added to a twin-screw extruder and melt-extruded and granulated at 250°C, screw speed 150 rpm, and residence time 8 min to obtain UV-resistant polycarbonate modified material.

[0024] Example 3: The purpose of this example is to verify the material’s ultimate anti-aging properties and processing adaptability when the components and reaction conditions are at a high level.

[0025] S1, 120 parts of polycarbonate, 8 parts of 2,7-dihydroxypyrene, 5 parts of 4-formylphenylboronic acid, and 6 parts of 1,10-o-phenanthroline were added to an organic solvent and reacted at 80°C and 800 rpm for 4 h to obtain a precursor reaction system; then 3 parts of cerium chloride and 12 parts of tetraethoxysilane were added and reacted at 100°C and pH 7 for 6 h to form a multi-coordinated-siloxane network structure; then melt-blended at 260°C, 150 rpm screw speed, and 15 min residence time to obtain synergistically modified polycarbonate; S2, the above-mentioned synergistically modified polycarbonate and 10 parts of p-hydroxybenzophenone were premixed at 80°C and 600 rpm for 30 min to obtain a uniform mixture; then 5 parts of antioxidant, 6 parts of light stabilizer, 3 parts of lubricating dispersant and 20 parts of inorganic filler were added, and the mixture was mixed and dispersed at 100°C and 1200 rpm for 40 min to obtain the material. S3. The material is added to a twin-screw extruder and melt-extruded and granulated at 270°C, screw speed of 200 rpm and residence time of 12 min to obtain UV-resistant polycarbonate modified material.

[0026] Comparative Example 1: The purpose of this comparative example is to verify the effect of using only single coordination modification without introducing the dynamic structure of borate ester and Schiff base structure on the material properties.

[0027] S1, 100 parts of polycarbonate and 3 parts of 1,10-o-phenanthroline were added to an organic solvent and reacted at 65°C and 500 rpm for 2.5 h to obtain a precursor reaction system; then 1.5 parts of cerium chloride and 7 parts of tetraethoxysilane were added and reacted at 80°C and pH 6 for 4 h to form a coordination-siloxane network structure; then melt-blended at 240°C, 120 rpm screw speed and 10 min residence time to obtain modified polycarbonate; S2, the above modified polycarbonate and 5 parts of p-hydroxybenzophenone were premixed at 60°C and 400 rpm for 20 min to obtain a uniform mixture; then 2 parts of antioxidant, 3 parts of light stabilizer, 1.5 parts of lubricating dispersant and 10 parts of inorganic filler were added, and the mixture was mixed and dispersed at 80°C and 800 rpm for 25 min to obtain the material. S3. The material is added to a twin-screw extruder and melt-extruded and granulated at 250°C, screw speed 150 rpm, and residence time 8 min to obtain UV-resistant polycarbonate modified material.

[0028] Comparative Example 2: The purpose of this comparative example is to verify the effect of using only borate ester dynamic structure modification without introducing coordination structure and silicon-oxygen network structure on material properties.

[0029] S1, 100 parts of polycarbonate, 4 parts of 2,7-dihydroxypyrene and 2 parts of 4-formylphenylboronic acid were added to an organic solvent and reacted at 65°C and 500 rpm for 2.5 h to obtain a precursor reaction system; then the reaction was continued for 4 h under the same conditions to form a dynamic borate ester structure; then the mixture was melt-blended at 240°C, 120 rpm screw speed and 10 min residence time to obtain modified polycarbonate; S2, the above modified polycarbonate and 5 parts of p-hydroxybenzophenone were premixed at 60°C and 400 rpm for 20 min to obtain a uniform mixture; then 2 parts of antioxidant, 3 parts of light stabilizer, 1.5 parts of lubricating dispersant and 10 parts of inorganic filler were added, and the mixture was mixed and dispersed at 80°C and 800 rpm for 25 min to obtain the material. S3. The material is added to a twin-screw extruder and melt-extruded and granulated at 250°C, screw speed 150 rpm, and residence time 8 min to obtain UV-resistant polycarbonate modified material.

[0030] Comparative Example 3: The purpose of this comparative example is to verify the effect of not adding organic small molecule functional regulators on the UV resistance of the material.

[0031] S1, 100 parts of polycarbonate, 4 parts of 2,7-dihydroxypyrene, 2 parts of 4-formylphenylboronic acid and 3 parts of 1,10-o-phenanthroline were added to an organic solvent and reacted at 65°C and 500 rpm for 2.5 h to obtain a precursor reaction system; then 1.5 parts of cerium chloride and 7 parts of tetraethoxysilane were added and reacted at 80°C and pH 6 for 4 h to form a multi-coordinated-siloxane network structure; then melt-blended at 240°C, 120 rpm screw speed and 10 min residence time to obtain synergistically modified polycarbonate; S2, the above-mentioned synergistically modified polycarbonate was premixed at 60°C and 400 rpm for 20 min to obtain a uniform mixture; then 2 parts of antioxidant, 3 parts of light stabilizer, 1.5 parts of lubricating dispersant and 10 parts of inorganic filler were added, and the mixture was mixed and dispersed at 80°C and 800 rpm for 25 min to obtain the material. S3. The material is added to a twin-screw extruder and melt-extruded and granulated at 250°C, screw speed 150 rpm, and residence time 8 min to obtain UV-resistant polycarbonate modified material.

[0032] Performance testing: 1. UV aging performance test The samples from the examples and comparative examples were injection molded into standard sheets with a thickness of 2 mm and placed in a UV aging test chamber at an irradiation wavelength of 340 nm and an irradiation intensity of 0.76 W / m. 2 Cyclic aging was carried out under the following conditions: aging temperature was 60℃, relative humidity was 50%, and the aging process involved alternating cycles of 8 hours of UV irradiation and 4 hours of condensation, with a total aging time of 500 hours. After aging, the yellowing index and surface cracking of the samples were tested to evaluate the material's resistance to UV aging.

[0033] 2. Mechanical property retention rate test The samples from the examples and comparative examples were prepared as standard dumbbell-shaped tensile specimens, and their tensile strength before aging was measured. Subsequently, the specimens were placed in a UV aging test chamber and aged for 500 hours under the same conditions as the UV aging performance test. The tensile strength was measured again, and the tensile strength retention rate was calculated. The mechanical stability of the material under UV environment was evaluated by comparing the retention rates.

[0034] 3. Thermo-oxidative stability test The samples from the examples and comparative examples were prepared as standard sheets and placed in a forced-air drying oven for thermo-oxidative aging treatment at 120°C in an air atmosphere for 200 hours. After aging, the mass of the samples was weighed and the changes in their surface color and integrity were observed. The mass change rate was calculated, and it was recorded whether obvious embrittlement or deformation occurred, in order to evaluate the thermo-oxidative stability of the materials.

[0035] 4. Weather resistance optical stability test The samples from the examples and comparative examples were prepared as transparent sheets with a thickness of 1 mm. The initial transmittance was measured using a UV-Vis spectrophotometer. Subsequently, the sheets were aged for 500 h in a UV aging chamber under the above UV aging conditions. The transmittance was measured again, and the transmittance retention rate was calculated. The optical stability of the material was evaluated by comparing the changes in transmittance before and after aging.

[0036] Table 1. Performance test results of UV-resistant polycarbonate modified materials As shown in Table 1, there are significant differences between the examples and the comparative examples in various performance indicators. Example 2 exhibits the best overall performance, with a yellowing index of 1.6, tensile strength retention of 93.8%, mass change rate of 0.8%, and light transmittance retention of 94.5%. This indicates that when the components and reaction conditions are within a moderate range, the synergistic modification structure is more conducive to exerting a stabilizing effect. In contrast, Example 1 has a yellowing index of 2.8, tensile strength retention of 86.5%, mass change rate of 1.9%, and light transmittance retention of 88.2%, while Example 3 has a yellowing index of 2.1, tensile strength retention of 90.2%, mass change rate of 1.2%, and light transmittance retention of 91.3%, all slightly lower than Example 2.

[0037] Regarding the yellowing index, Examples 1 to 3 had indices of 2.8, 1.6, and 2.1, respectively, all significantly lower than the comparative indices of 4.9, 5.6, and 4.3 for Comparative Examples 1 to 3. This indicates that the synergistically modified polycarbonate system can effectively inhibit the photo-oxidative degradation reaction induced by ultraviolet light. Among them, Example 2 had the lowest yellowing index, indicating that it had the strongest ability to absorb and dissipate ultraviolet light. In contrast, the comparative examples showed a significantly aggravated yellowing due to the lack of a complete synergistic structure or key components.

[0038] Regarding the retention rate of mechanical properties, Examples 1 to 3 were 86.5%, 93.8%, and 90.2%, respectively, which were significantly higher than those of Comparative Examples 1 to 3 (78.4%, 75.2%, and 80.1%). This indicates that the synergistic modification system can effectively maintain the stability of the polycarbonate molecular chain structure and reduce chain breakage and performance degradation during UV aging. Among them, Example 2 performed the best, indicating that it had the strongest structural stability.

[0039] Regarding thermo-oxidative stability, the mass change rates of the examples were 1.9%, 0.8%, and 1.2%, respectively, which were significantly lower than those of the comparative examples (3.1%, 3.8%, and 2.7%). This indicates that the synergistic network structure can effectively suppress degradation reactions under thermo-oxidative conditions. Among them, Example 2 had the lowest mass change rate, indicating that it had the best anti-degradation ability.

[0040] In terms of optical performance, the transmittance retention rates of the embodiments were 88.2%, 94.5% and 91.3%, respectively, which were significantly higher than those of the comparative examples (82.6%, 80.3% and 84.0%). This indicates that the constructed synergistic modification system maintained good transparency while improving weather resistance. Among them, Example 2 had the highest transmittance retention rate and showed the best optical stability.

[0041] This invention constructs a multi-synergistic modified structure and introduces organic small molecule functional regulators, making the materials in the examples significantly superior to the comparative examples in terms of yellowing index, mechanical property retention rate, mass change rate, and light transmittance retention rate. Among them, Example 2 achieves 1.6, 93.8%, 0.8%, and 94.5% respectively, with the best overall performance, fully demonstrating the significant advantages of the synergistic modification system.

Claims

1. An ultraviolet-aging resistant polycarbonate modified material characterized by, The material comprises the following raw materials in parts by weight: 80-120 parts of synergistically modified polycarbonate; 1-10 parts of organic small molecule functional regulator; 0.5-5 parts of antioxidant; 0.5-6 parts of light stabilizer; 0.3-3 parts of lubricant and dispersant; and 0.5-20 parts of inorganic filler. The synergistically modified polycarbonate is formed by synergistic modification of polycarbonate with 2,7-dihydroxypyrene, 4-formylphenylboronic acid, and 1,10-o-phenanthroline through dynamic covalent bonding of borate esters, Schiff base condensation reaction, and rare earth ion coordination crosslinking. The organic small molecule functional regulator is p-hydroxybenzophenone.

2. The ultraviolet aging resistant polycarbonate modified material according to claim 1, characterized in that, The synergistically modified polycarbonate comprises the following raw materials in parts by weight: 80-120 parts polycarbonate; 1-8 parts 2,7-dihydroxypyrene; 0.5-5 parts 4-formylphenylboronic acid; 0.5-6 parts 1,10-o-phenanthroline; 0.2-3 parts cerium chloride; and 2-12 parts tetraethoxysilane.

3. The UV-resistant polycarbonate modified material according to claim 1 or 2, characterized in that, The preparation method of the synergistically modified polycarbonate includes the following steps: (1) 2,7-dihydroxypyrene, 4-formylphenylboronic acid and 1,10-o-phenanthroline were mixed and dispersed in an organic solvent, and the reaction was stirred to obtain a precursor reaction system; (2) Add cerium chloride and tetraethoxysilane to the precursor reaction system and continue the reaction to form a multi-coordinated silicon-oxygen network structure; (3) Polycarbonate was added to a multi-coordination-siloxane network structure for melt blending to obtain synergistically modified polycarbonate.

4. The UV-resistant polycarbonate modified material according to claim 3, characterized in that, The reaction conditions for step (1) are to stir the reaction at 50-80°C for 1-4 hours at a stirring speed of 300-800 rpm.

5. The UV-resistant polycarbonate modified material according to claim 3, characterized in that, The reaction conditions for step (2) are: reaction at 60-100℃ for 2-6 hours and pH 5-7.

6. The UV-resistant polycarbonate modified material according to claim 3, characterized in that, The reaction conditions for step (3) are: melt blending temperature of 220-260°C, screw speed of 80-150 rpm, and residence time of 5-15 min.

7. The UV-resistant polycarbonate modified material according to claim 1, characterized in that, The antioxidant is a mixture of hindered phenolic antioxidants and phosphite antioxidants in a mass ratio of 1:0.5 to 1:2; the light stabilizer is a mixture of hindered amine light stabilizers and ultraviolet absorbers in a mass ratio of 1:0.5 to 1:3; the lubricating dispersant is a mixture of polyethylene wax and zinc stearate in a mass ratio of 1:0.5 to 1:2; and the inorganic filler is a mixture of nano-silica and talc in a mass ratio of 1:0.5 to 1:

3.

8. A method for preparing a UV-resistant polycarbonate modified material, characterized in that, The preparation method includes the following steps: S1, premix the synergistically modified polycarbonate with the organic small molecule functional regulator to obtain a uniform mixture; S2, antioxidants, light stabilizers, lubricating dispersants and inorganic fillers are added to the uniform mixture, and the mixture is mixed and dispersed in a high-speed mixer to obtain the material; S3, the material is added to a twin-screw extruder for melt extrusion granulation to obtain UV-resistant polycarbonate modified material.

9. The method for preparing an anti-UV aging polycarbonate modified material according to claim 8, characterized in that, The reaction conditions for step S1 are: premixing at 40–80°C for 10–30 min and rotating at 200–600 rpm; the reaction conditions for step S2 are: mixing and dispersing at 60–100°C for 15–40 min and rotating at 500–1200 rpm; the reaction conditions for step S3 are: melt extrusion temperature of 230–270°C, screw speed of 100–200 rpm, and residence time of 5–12 min.

10. The application of the UV-resistant polycarbonate modified material according to any one of claims 1 to 7 in automotive lamp covers, automotive sunroof transparent panels, outdoor optical light-transmitting panels, and transparent housings for electronic appliances.

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