Aging-resistant insulating polycarbonate composition and use thereof

Abstract

The application discloses an anti-aging and insulating polycarbonate composition and application thereof, and belongs to the field of high polymer materials. The polycarbonate composition is prepared by matching specific types of voltage stabilizers and dispersants, can effectively improve the CTI electrical property of the product, makes the CTI 400V greater than or equal to 50 drops, has excellent flame-retardant property, and has sufficient light aging resistance, and is very suitable for the preparation of photovoltaic inserts.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high polymer materials, in particular to a kind of ageing-resistant insulating polycarbonate composition and application thereof. BACKGROUND

[0002] In the field of optoelectronics, photovoltaic inserts for photoelectric conversion generally require materials with excellent electrical insulation for the preparation of key components such as sheaths, insulation boards, etc., and polycarbonate should be one of the suitable materials in theory based on its excellent mechanical properties and heat resistance, but currently this material can only meet the requirement of CTI 175V≥50 drops, and when the voltage rises to 400V, it will quickly fail (≤20 drops).

[0003] Although some products introduce a large amount of electrical property modifiers in the components to improve the electrical insulation performance of the products, most of these components will affect the mechanical properties of the products, especially the toughness, greatly limiting the use range of the products.

[0004] On the other hand, since photovoltaic inserts generally need to be used in long-term light environments, the components used for the products also need to have excellent light aging resistance, and the light aging resistance of polycarbonate material itself is not particularly good, and after introducing some organic electrical property modifiers, the light aging resistance of the modified product may even deteriorate. SUMMARY

[0005] Based on the defects of the prior art, the purpose of the present application is to provide an ageing-resistant insulating polycarbonate composition, which, by cooperating with a specific type of voltage stabilizer and dispersant, can effectively improve the CTI electrical performance of the product, so that CTI 400V≥50 drops, with excellent flame retardance, sufficient toughness and light aging resistance, and is very suitable for the preparation of photovoltaic inserts.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0007] An ageing-resistant insulating polycarbonate composition, comprising the following components by weight:

[0008] polycarbonate 55-95 parts, toughening agent 1-20 parts, flame retardant 5-25 parts, voltage stabilizer 1.5-6 parts, dispersant 0.01-1 parts, and anti-dripping agent 0.1-5 parts;

[0009] The voltage stabilizer is at least one of benzophenone and benzophenone derivatives;

[0010] The dispersant is an oxidized polyethylene wax with an acid value of 30-60 mgKOH / mol.

[0011] Preferably, the acid value of the dispersant is 35-55 mgKOH / mol.

[0012] Preferably, the weight fraction of the polycarbonate is one or a range value of any two of 60 parts, 65 parts, 70 parts, 75 parts, 80 parts, 85 parts, 90 parts; the weight fraction of the toughening agent is one or a range value of any two of 1 part, 2 parts, 4 parts, 5 parts, 12 parts, 15 parts, 18 parts, 20 parts; the weight fraction of the flame retardant is one or a range value of any two of 5 parts, 10 parts, 12 parts, 15 parts, 18 parts, 20 parts, 25 parts; the weight fraction of the voltage stabilizer is one or a range value of any two of 1.5 parts, 2 parts, 2.5 parts, 2.6 parts, 2.75 parts, 3 parts, 3.12 parts, 3.2 parts, 3.5 parts, 4 parts, 5 parts, 6 parts; the weight fraction of the dispersant is one or a range value of any two of 0.01 parts, 0.02 parts, 0.05 parts, 0.1 parts, 0.18 parts, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.55 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 part; the weight fraction of the anti-dripping agent is one or a range value of any two of 0.1 parts, 0.2 parts, 0.5 parts, 0.6 parts, 1 part, 2 parts, 3 parts, 4 parts, 5 parts;

[0013] Preferably, the polycarbonate composition with aging resistance and insulation comprises the following components by weight fraction:

[0014] Polycarbonate 60-90 parts, toughening agent 2-18 parts, flame retardant 10-20 parts, voltage stabilizer 2-4 parts, dispersant 0.02-0.9 parts, and anti-dripping agent 0.2-4 parts.

[0015] The conventional polycarbonate composition itself is difficult to meet the higher requirements for electrical insulation performance, and the light aging resistance is not obvious. The improvement of electrical insulation performance generally introduces some electrical performance modifiers, but the compatibility of these modifiers is difficult. The main reason is that these modifiers are generally small molecules, which cannot be effectively attached in the polycarbonate with amorphous and loose morphology structure than other plastics, and then migration or precipitation occurs. On the other hand, these small molecules are very easy to volatilize or react under light induction, which has a great impact on the base resin, and may cause significant mechanical property decay of the product under continuous light.

[0016] On the other hand, due to the high carbon structure of polycarbonate, although it has good self-extinguishing flame retardancy, the carbon loop after carbonization under external voltage is easy to conduct, making the electrical tracking failure more rapid than other plastic systems.

[0017] Therefore, in order to improve the electrical insulation of the polycarbonate material itself, while also ensuring the mechanical properties and light aging resistance of the product, in the polycarbonate composition described in the present application, benzophenone and / or its derivatives are used as voltage stabilizers. Based on the special benzophenone structure, such substances can be well compatible in polycarbonate, and in combination with oxidized polyethylene wax with hydroxyl or carboxyl groups, the uniform dispersibility of the components can be more effectively improved. Under the joint action of the two, the voltage stabilizer can fully exert the external voltage stability, greatly enhance the trapping effect on charge carriers, improve the charge transport performance, and reduce the local charge concentration conduction of polycarbonate due to the structural defects of the body without reducing the flame retardance of the product. At the same time, the overall product can also ensure sufficient toughness and light aging resistance, and the toughness can be maintained at more than 50% after 1000h xenon lamp aging.

[0018] As for the selection of the type of dispersant, the inventors found that when the acid value of the dispersant is less than 30mgKOH / mol, the content of carboxyl or hydroxyl groups contained therein is insufficient, and it is difficult to achieve a synergistic effect with the voltage stabilizer. If the acid value is higher than 60mgKOH / mol, the compatibility of the dispersant with polycarbonate is low, which not only leads to poor toughness and light aging resistance of the product, but also may even form an electric circuit due to the improved antistatic property of the component, resulting in poor CTI electrical performance of the product.

[0019] Preferably, the polycarbonate composition comprises the following components by weight:

[0020] Polycarbonate 65-75 parts, toughening agent 4-15 parts, flame retardant 12-18 parts, voltage stabilizer 2.5-3.5 parts, dispersant 0.05-0.8 parts, and anti-dripping agent 0.3-1 part.

[0021] More preferably, the weight fraction of the voltage stabilizer is 2.7-3.2 parts, and the weight fraction of the dispersant is 0.15-0.6 parts.

[0022] More preferably, the mass percentage content of polycarbonate in the polycarbonate composition is ≥50wt%.

[0023] Preferably, the benzophenone derivative includes at least one of hydroxybenzophenone, phenylbenzophenone, and halogenated benzophenone.

[0024] Preferably, the hydroxybenzophenone is 2-hydroxybenzophenone, the phenylbenzophenone is 2,2-phenylbenzophenone, and the halogenated benzophenone is at least one of bromobenzophenone, chlorobenzophenone, fluorobenzophenone, and iodobenzophenone.

[0025] Preferably, the acid value of the dispersant is one of or a range value of any two of 30 mgKOH / mol, 32 mgKOH / mol, 34 mgKOH / mol, 36 mgKOH / mol, 38 mgKOH / mol, 40 mgKOH / mol, 42 mgKOH / mol, 45 mgKOH / mol, 48 mgKOH / mol, 50 mgKOH / mol, 52 mgKOH / mol, 55 mgKOH / mol, 56 mgKOH / mol, 58 mgKOH / mol, 60 mgKOH / mol.

[0026] When the acid value of the dispersant is maintained within the above range, not only can high compatibility and high dispersibility of the dispersant itself and each component in the polycarbonate be effectively achieved, but also a synergistic effect with the voltage stabilizer can be effectively achieved, thereby improving the CTI electrical performance of the product together, without affecting the light aging resistance of the product.

[0027] More preferably, the acid value of the dispersant is obtained by testing according to ASTM D1386-15-2022.

[0028] More preferably, the number average molecular weight of the dispersant is 1000-25000, and further preferably 2500-5000.

[0029] More preferably, the number average molecular weight of the dispersant is one of or a range value of any two of 2500, 2800, 3000, 3200, 3500, 3800, 4000, 4200, 4500, 4800, 5000.

[0030] More preferably, the number average molecular weight of the dispersant is 3500-4500.

[0031] The testing method of the number average molecular weight of the dispersant is tested according to SH / T 0398-2007 by viscosity method.

[0032] More preferably, the melt flow rate of the dispersant at 300°C under a load of 1.2 kg according to ISO 1133-2012 is 10-150 g / 10 min.

[0033] More preferably, the melt flow rate of the dispersant at 300°C under a load of 1.2 kg according to ISO 1133-2012 is 10-70 g / 10 min.

[0034] More preferably, the dispersant has a melt flow rate of 10 g / 10 min, 15 g / 10 min, 20 g / 10 min, 30 g / 10 min, 40 g / 10 min, 50 g / 10 min, 60 g / 10 min, 65 g / 10 min, 70 g / 10 min, or a range value of any two of them, at 300℃, 1.2 kg load according to ISO 1133-2012.

[0035] More preferably, the dispersant has a melt flow rate of 10-15 g / 10 min at 300℃, 1.2 kg load according to ISO 1133-2012.

[0036] Preferably, the ratio of the voltage stabilizer and the dispersant in the polycarbonate composition is (2:1)-(600:1).

[0037] Preferably, the ratio of the voltage stabilizer and the dispersant in the polycarbonate composition is one of 2:1, 3.7:1, 3.72:1, 3.75:1, 4:1, 5:1, 8:1, 9:1, 10:1, 13:1, 14:1, 17:1, 18:1, 20:1, 32:1, 60:1, 600:1, or a range value of any two of them.

[0038] Preferably, the ratio of the voltage stabilizer and the dispersant in the polycarbonate composition is (5-20):1.

[0039] At the ratio, both can effectively inhibit the local charge accumulation of the polycarbonate, and at the same time, the best light aging resistance can be achieved.

[0040] Preferably, the polycarbonate is a bisphenol A type polycarbonate.

[0041] Preferably, the polycarbonate has a melt flow rate of 3-20 g / 10 min at 300℃, 1.2 kg load according to ISO 1133-2012.

[0042] Preferably, the polycarbonate has a number average molecular weight of 22000-30000.

[0043] Preferably, the polycarbonate has a number average molecular weight of one of 22000, 24000, 25000, 28000, 30000, or a range value of any two of them.

[0044] The number average molecular weight of the polycarbonate can be directly detected by gel permeation chromatography.

[0045] More preferably, the polycarbonate has a terminal hydroxyl group content of <100 ppm and a BPA content of <20 ppm.

[0046] Preferably, the toughening agent is at least one of PDMS (polydimethylsiloxane)-carbonate copolymer, SAN grafted PDMS rubber, MMA grafted PMDS rubber, MMA grafted silicone rubber.

[0047] More preferably, the melt index of the toughening agent is 5-15 g / 10 min at 300℃ under 1.2 kg load according to ISO1133-2012.

[0048] Preferably, the flame retardant is a halogen-free flame retardant.

[0049] More preferably, the halogen-free flame retardant is at least one of phosphorus-based flame retardant, sulfonate flame retardant, silicone flame retardant, inorganic filler flame retardant.

[0050] More preferably, the halogen-free flame retardant is phosphorus-based flame retardant, and the phosphorus content of the phosphorus-based flame retardant is ≥10 wt%.

[0051] More preferably, the phosphorus-based flame retardant is at least one of DOPO (also known as DOP, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide), TPP (triphenyl phosphate), BDP (bisphenol A bis(diphenyl phosphate)), RDP (resorcinol (diphenyl phosphate)), phosphazene, phosphate ester.

[0052] Preferably, the anti-dripping agent is at least one of polytetrafluoroethylene, styrene-acrylonitrile copolymer.

[0053] More preferably, the components of the polycarbonate further include at least one of 0.01-1 parts of antioxidant, 0.01-1 parts of lubricant, 0.01-1 parts of reinforcing filler, 0.01-1 parts of colorant.

[0054] Based on the actual product needs, the skilled person in the art can appropriately introduce some components commonly introduced in polycarbonate products without affecting the performance of the product, such as antioxidants to improve the aging resistance of the product, lubricants to improve the processing performance of the product, reinforcing fillers to improve the rigidity of the product, and colorants to impart various color systems to the product, etc.

[0055] Another object of the present application is to provide a preparation method of the aging-resistant insulating polycarbonate composition, comprising the following steps:

[0056] After mixing the components uniformly, melt extrusion granulation is carried out in a twin-screw extruder, and the aging-resistant insulating polycarbonate composition is obtained.

[0057] The preparation method of the polycarbonate composition of the present application has simple operation steps and can realize industrialized scale production.

[0058] Preferably, the temperature interval of the twin-screw extruder is set to 220-280 DEG C, the screw rotation speed is 200-600 r / min, and the screw length-diameter ratio is 48:1.

[0059] It is another object of the present application to provide the use of the anti-aging insulating polycarbonate composition in the preparation of photovoltaic inserts.

[0060] The polycarbonate composition has excellent CTI electrical performance and flame-retardant performance, can achieve CTI 400V≥50 drops, 1.5mm flame-retardant grade reaches V-0 level, and the impact strength at room temperature reaches 500J / m 2 The impact strength retention rate at-30 DEG C can reach 50% or more, the impact strength retention rate after 1000h irradiation under a xenon lamp can reach 50% or more, the comprehensive performance is excellent, and the polycarbonate composition is very suitable for the preparation of photovoltaic inserts which need to avoid high-voltage tracking failure and require certain light-resistant environmental properties.

[0061] The polycarbonate composition has excellent CTI electrical performance and flame-retardant performance, can achieve CTI 400V≥50 drops, 1.5mm flame-retardant grade reaches V-0 level, and the impact strength at room temperature reaches 500J / m DETAILED DESCRIPTION

[0062] In order to better illustrate the objects, technical solutions and advantages of the present application, the present application will be further described below in combination with specific examples and comparative examples, and the purpose is to understand the content of the present application in detail, rather than to limit the present application. All other examples obtained by those skilled in the art without creative labor fall within the protection scope of the present application. Unless otherwise specified, the experimental reagents and instruments involved in the implementation of the present application are common ordinary reagents and instruments.

[0063] Examples 1-20

[0064] An embodiment of the anti-aging insulating polycarbonate composition and the use thereof, the composition of the polycarbonate composition is shown in Table 1.

[0065] The preparation method of the polycarbonate composition comprises the following steps:

[0066] After all the components in the formula are uniformly mixed by a high-speed mixer, they are sent into a twin-screw extruder through a main feeding port for melt blending extrusion and granulation, and the polycarbonate composition is obtained.

[0067] The components are melt blended extruded, the temperature zones of the twin-screw extruder are set as follows: zone 1 200-220°C, zone 2 210-230°C, zone 3 215-235°C, zone 4 215-235°C, zone 5 215-235°C, zone 6 220-245°C, zone 7 220-245°C, zone 8 220-245°C, zone 9 220-240°C, zone 10 220-240°C, zone 11 210-230, zone 12 200-220°C, the screw rotation speed is 400 rpm, and the screw length-diameter ratio is 48:1.

[0068] Comparative Examples 1-9

[0069] The difference between each comparative example and each example is only in the type and ratio of the components, as shown in Table 2.

[0070] In the components of each example and comparative example,

[0071] The polycarbonate 1 is 1300-03NP, produced by LG Chemical, the melt flow rate under 300°C and 1.2 kg load is 3.5 g / 10 min, the number average molecular weight is 30000, the end hydroxyl group content is <100 ppm, and the BPA content is <20 ppm;

[0072] The polycarbonate 2 is 1300-10NP, produced by LG Chemical, the melt flow rate under 300°C and 1.2 kg load is 11.5 g / 10 min, the number average molecular weight is 26500, the end hydroxyl group content is <100 ppm, and the BPA content is <20 ppm;

[0073] The polycarbonate 3 is 1300-22NP, produced by LG Chemical, the melt flow rate under 300°C and 1.2 kg load is 23.2 g / 10 min, the number average molecular weight is 22000, the end hydroxyl group content is <100 ppm, and the BPA content is <20 ppm;

[0074] The toughening agent 1 is AC9144, a PDMS-carbonate copolymer, produced by Cangzhou Dahua, and the melt flow index under 300°C and 1.2 kg load is 10.2 g / 10 min according to ISO1133;

[0075] The toughening agent 2 is S2130, a MMA grafted silicone rubber, produced by Mitsubishi Chemical, Japan, and the melt flow index under 300°C and 1.2 kg load is 5.9 g / 10 min according to ISO1133;

[0076] The flame retardant is a halogen-free phosphorus-based flame retardant phosphate ester, and the phosphorus content is 9.1 wt%, and the product is PX200 produced by Japan Daiba;

[0077] The anti-dripping agent is a commercially available polytetrafluoroethylene;

[0078] The voltage stabilizer 1 is a commercially available 2-hydroxybenzophenone;

[0079] The voltage stabilizer 2 is a commercially available 2,2-phenylbenzophenone;

[0080] The voltage stabilizer 3 is a commercially available benzoic acid;

[0081] The voltage stabilizer 4 is a commercially available phosphite;

[0082] The voltage stabilizer 5 is a commercially available 2-bromobenzophenone;

[0083] The voltage stabilizer 6 is a commercially available benzophenone;

[0084] The dispersant 1 is 2203, manufactured by Mitsui, Japan, an oxidized polyethylene wax, having an acid value of 35 mgKOH / mol, a number average molecular weight of 2700, and a melt flow rate of 65 g / 10 min at 300°C under a load of 1.2 kg;

[0085] The dispersant 2 is Polywax 2000, manufactured by Nucera, an oxidized polyethylene wax, having an acid value of 55 mgKOH / mol, a number average molecular weight of 2300, and a melt flow rate of 27.5 g / 10 min at 300°C under a load of 1.2 kg;

[0086] The dispersant 3 is AC330, manufactured by Honeywell, an oxidized polyethylene wax, having an acid value of 30 mgKOH / mol, a number average molecular weight of 3600, and a melt flow rate of 12.5 g / 10 min at 300°C under a load of 1.2 kg;

[0087] The dispersant 4 is 1105A, manufactured by Mitsui, Japan, an oxidized polyethylene wax, having an acid value of 60 mgKOH / mol, a number average molecular weight of 2000, and a melt flow rate of 20.7 g / 10 min at 300°C under a load of 1.2 kg;

[0088] The dispersant 5 is AC325, manufactured by Honeywell, an oxidized polyethylene wax, having an acid value of 25 mgKOH / mol, a number average molecular weight of 4500, and a melt flow rate of 15 g / 10 min at 300°C under a load of 1.2 kg;

[0089] The dispersant 6 is C6112, manufactured by Nucera, an oxidized polyethylene wax, having an acid value of 70 mgKOH / mol, a number average molecular weight of 2500, and a melt flow rate of 23.5 g / 10 min at 300°C under a load of 1.2 kg;

[0090] The dispersant 7 is NF308 produced by Mitsui, Japan, maleic anhydride grafted polypropylene, the acid value is about 30 mgKOH / mol, the melt flow rate under 190°C and 2.16 kg load is 100 g / 10 min;

[0091] The dispersant 8 is PETS produced by Clariant, GLYCOBEP.

[0092] The component raw materials used in each embodiment and comparative example of the present application are commercially available raw materials unless otherwise specified, and the component raw materials used in each parallel experiment are the same.

[0093] Table 1

[0094]

[0095]

[0096] Table 2

[0097]

[0098]

[0099] In order to verify the performance of the polycarbonate composition described in the present application, the products prepared in each embodiment and comparative example are subjected to the following performance tests, and the specific steps are as follows:

[0100] (1) Normal temperature IZOD notched impact strength test: according to the ASTM D256-2010 standard, each product is injection molded into an impact sample with a size of 3.2 mm, and a V-shaped notch is used for testing, and the impact capacity is 1.25 J;

[0101] (2) Xenon lamp 1000h aging notched impact strength retention rate test: after the sample is placed under the xenon lamp for 1000h (irradiation intensity: 0.51 W / m2@340 nm), according to the ASTM D275 standard, each product is injection molded into an impact sample with a size of 3.2 mm, and a V-shaped notch is used for testing, and the impact capacity is 1.25 J; the test results of this step are compared with the test results of step (1) to calculate the retention rate (%);

[0102] (3) 1.5 mm flame retardant grade test: according to the UL94-2023 standard for testing and determination;

[0103] (4) CTI 400V test: according to the ASTM D3638 standard for testing and determination.

[0104] The test results are shown in Tables 3 and 4.

[0105] Table 3

[0106]

[0107] Table 4

[0108]

[0109]

[0110] From Table 3 and Table 4, it can be seen that the impact strength of the polycarbonate composition of the present application at room temperature is high, which can reach 600 J / m 2 and above, while having good light aging resistance, the impact strength retention rate after 1000 h xenon lamp aging is all above 50%, the CTI failure drop number of 400V is ≥ 50 drops, and the flame retardant grade is all V-0 grade, and the electrical insulation and flame retardance are excellent. In comparison, the CTI performance and light aging resistance of the products of Comparative Example 1 and Comparative Example 5 are not ideal because no voltage stabilizer and dispersant are introduced, respectively, and according to the product performance comparison of Example 1, Examples 10-11, Examples 12-13, and Comparative Examples 2 and 6, the addition amount of the two components cannot be too much, otherwise the performance of the product in all aspects will be weakened. As can be seen from the product performance comparison of Example 1 and Examples 14-17, when the total addition amount of the two is certain, when the ratio of the two is (5-20):1, the comprehensive performance of the product is better. As can be seen from the product performance results of Example 1, Example 6, and Comparative Examples 3-4, the use of conventional types of voltage stabilizers cannot truly take into account the compatibility with the matrix resin, and at the same time cannot be well matched with the dispersant, and the CTI performance and light aging resistance of the product are not ideal; and according to the product comparison of Example 1 and Comparative Examples 9 and 10, if a more conventional processing dispersant on the market is used, or another polyolefin is used as a dispersant, the performance improvement of the same type of dispersant described in the present application may not be achieved, and according to the product performance of Example 1, Examples 8-9, and Comparative Examples 7-8, even if an oxidized polyethylene wax with carboxyl and / or hydroxyl groups is selected as a dispersant, it is necessary to strictly control the acid value of the product to be 30-60 mKOH / mol (preferably 35-55 mKOH / mol), otherwise not only the component compatibility of the product cannot be improved, but also the CTI performance of the product can be negatively affected.

[0111] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application and not to limit the protection scope of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the essence and scope of the technical solutions of the present application.

Claims

1. An aging-resistant and insulating polycarbonate composition, characterized in that, The components include the following parts by weight: 55-95 parts polycarbonate, 1-20 parts toughening agent, 5-25 parts flame retardant, 1.5-6 parts voltage stabilizer, 0.01-1 part dispersant, and 0.1-5 parts anti-dripping agent; The voltage stabilizer is at least one of benzophenone and benzophenone derivatives; The dispersant is oxidized polyethylene wax with an acid value of 30~60 mgKOH / mol.

2. The polycarbonate composition according to claim 1, characterized in that, The benzophenone derivatives include at least one of hydroxybenzophenone, phenylbenzophenone, and halobenzophenone.

3. The polycarbonate composition according to claim 1, characterized in that, The acid value of the dispersant is 35~55 mgKOH / mol.

4. The polycarbonate composition according to claim 1, characterized in that, The dispersant has a number average molecular weight of 1000~25000 and a melt flow rate of 10~150 g / 10min at 300℃ and 1.2kg load according to ISO1133-2012.

5. The polycarbonate composition according to claim 1, characterized in that, In the polycarbonate composition, the weight ratio of voltage stabilizer to dispersant is (5~20):

1.

6. The polycarbonate composition according to claim 1, characterized in that, The polycarbonate, according to ISO 1133-2012, has a melt flow rate of 3~26 g / 10 min at 300℃ and 1.2 kg load, and a number average molecular weight of 22000~30000.

7. The polycarbonate composition according to claim 1, characterized in that, The toughening agent is at least one of PDMS-carbonate copolymer, SAN-grafted PDMS rubber, and MMA-grafted PMDS rubber.

8. The polycarbonate composition according to claim 1, characterized in that, The flame retardant is a halogen-free flame retardant; the anti-dripping agent is at least one of polytetrafluoroethylene and styrene-acrylonitrile copolymer.

9. A method for preparing the aging-resistant insulating polycarbonate composition according to any one of claims 1 to 8, characterized in that, Includes the following steps: After the components are mixed evenly, they are melt-extruded and granulated in a twin-screw extruder to obtain the aging-resistant and insulating polycarbonate composition.

10. The use of the aging-resistant insulating polycarbonate composition according to any one of claims 1 to 8 in the preparation of photovoltaic plugs.

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