Aging-resistant insulating polycarbonate composition and use thereof

Abstract

Disclosed are an aging-resistant insulating polycarbonate composition and a use thereof, belonging to the field of polymer materials. The polycarbonate composition of the present invention, by means of pairing a special type of voltage stabilizer with a dispersing agent, can not only effectively increase the CTI electrical property of a product, causing CTI to be 400V at greater than or equal to 50 drops, and enable the product to have excellent flame retardant properties, but can also achieve sufficient aging resistance. The polycarbonate composition is very suitable for preparation of photovoltaic inserts.

Description

Aging-resistant insulating polycarbonate composition and its application Technical Field

[0001] The present invention relates to the technical field of polymer materials, and in particular to an aging-resistant insulating polycarbonate composition and application thereof. Background Art

[0002] In the optoelectronics field, photovoltaic plug-ins used for photoelectric conversion generally require materials with excellent electrical insulation properties to prepare key components such as sheaths and insulation boards. Polycarbonate should theoretically be one of the more suitable materials due to its excellent mechanical properties and heat resistance. However, the material currently only meets the CTI requirement of 175V ≥ 50 drops and will quickly fail (≤ 20 drops) when the voltage rises to 400V.

[0003] Although some products introduce a large amount of electrical performance modifiers into their components to improve the electrical insulation performance of the products, most of these components will affect the mechanical properties of the products, especially toughness, which greatly limits the scope of use of the products.

[0004] On the other hand, since photovoltaic plug-ins generally need to be used in long-term lighting environments, the components used in this product also need to have excellent light aging resistance. However, the light aging resistance of polycarbonate material itself is not particularly good. The introduction of some organic electrical performance modifiers may even cause the light aging resistance of the modified product to deteriorate.

[0005] Summary of the Invention

[0006] In response to the shortcomings of the prior art, the present invention aims to provide an aging-resistant and insulating polycarbonate composition. This product, through the combination of specific types of voltage stabilizers and dispersants, not only effectively improves the product's CTI electrical performance, achieving a CTI of 400V ≥ 50 drops, but also exhibits excellent flame retardancy, sufficient toughness, and light aging resistance, making it ideally suitable for the preparation of photovoltaic modules.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] An aging-resistant insulating polycarbonate composition comprises the following components in parts by weight:

[0009] 55-95 parts of polycarbonate, 1-20 parts of toughening agent, 5-25 parts of flame retardant, 1.5-6 parts of voltage stabilizer, 0.01-1 part of dispersant and 0.1-5 parts of anti-dripping agent;

[0010] The voltage stabilizer is at least one of benzophenone and a benzophenone derivative;

[0011] The dispersant is oxidized polyethylene wax with an acid value of 30 to 60 mgKOH / mol.

[0012] Preferably, the acid value of the dispersant is 35 to 55 mgKOH / mol.

[0013] Preferably, the weight proportion of the polycarbonate is 60 parts, 65 parts, 70 parts, 75 parts, 80 parts, 85 parts, 90 parts or any two of the range values; the weight proportion of the toughening agent is 1 part, 2 parts, 4 parts, 5 parts, 12 parts, 15 parts, 18 parts, 20 parts or any two of the range values; the weight proportion of the flame retardant is 5 parts, 10 parts, 12 parts, 15 parts, 18 parts, 20 parts or any two of the range values; the weight proportion of the voltage stabilizer is 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 or any two of the range values; the weight parts of the dispersant are 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 or any two of the range values; the weight parts of the anti-dripping agent are 0.1 parts, 0.2 parts, 0.5 parts, 0.6 parts, 1 part, 2 parts, 3 parts, 4 parts, 5 parts or any two of the range values;

[0014] Preferably, the aging-resistant insulating polycarbonate composition comprises the following components in parts by weight:

[0015] 60-90 parts of polycarbonate, 2-18 parts of toughening agent, 10-20 parts of flame retardant, 2-4 parts of voltage stabilizer, 0.02-0.9 parts of dispersant and 0.2-4 parts of anti-dripping agent.

[0016] The electrical insulation properties of traditional polycarbonate compositions themselves are difficult to meet higher requirements, and their light aging resistance is not obvious. To improve the electrical insulation performance, some electrical performance modifiers are generally introduced, but there are often compatibility issues with such modifiers. The main reason is that such modifiers are generally small molecules and cannot effectively adhere to polycarbonate, which is amorphous and has a looser morphological structure than other plastics, resulting in migration or even precipitation. On the other hand, such small molecules are very easy to volatilize or react under light induction, which has a great impact on the base resin and may cause the product to show obvious mechanical performance degradation under continuous light.

[0017] On the other hand, due to the high carbonization structure of polycarbonate, although it has good self-extinguishing flame retardancy, the carbon circuit after carbonization is easily conductive under an applied voltage, making the electrical tracking failure faster than other plastic systems.

[0018] 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 of the present invention, benzophenone and / or its derivatives are used as voltage stabilizers. Based on the special benzophenone structure, such substances are well compatible with polycarbonate. At the same time, they are combined with oxidized polyethylene wax having hydroxyl or carboxyl groups to more effectively improve the uniform dispersion of the components. Under the combined action of the two, the voltage stabilizer can fully exert the stability of the applied voltage, greatly enhance the trapping effect on charge carriers, improve the charge transport performance, and reduce the localized concentrated conduction of charges caused by structural defects in the polycarbonate without reducing the flame retardancy 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 1000 hours of xenon lamp aging.

[0019] Regarding the selection of dispersant types, the inventors found that when the acid value of the dispersant is less than 30 mgKOH / mol, the carboxyl or hydroxyl content it contains is insufficient, making it difficult for it to achieve a joint effect with the voltage stabilizer. If the acid value is higher than 60 mgKOH / mol, the compatibility of the dispersant with polycarbonate becomes low, which not only leads to poor toughness and light aging resistance of the product, but may even cause circuit conduction due to the enhanced antistatic properties of this component, resulting in poor CTI electrical performance of the product.

[0020] Preferably, the polycarbonate composition comprises the following components in parts by weight:

[0021] 65-75 parts of polycarbonate, 4-15 parts of toughening agent, 12-18 parts of flame retardant, 2.5-3.5 parts of voltage stabilizer, 0.05-0.8 parts of dispersant and 0.3-1 part of anti-dripping agent.

[0022] More preferably, the weight portion of the voltage stabilizer is 2.7 to 3.2 parts, and the weight portion of the dispersant is 0.15 to 0.6 parts.

[0023] More preferably, in the polycarbonate composition, the mass percentage of polycarbonate is ≥50 wt%.

[0024] Preferably, the benzophenone derivative includes at least one of hydroxybenzophenone, phenylbenzophenone, and halogenated benzophenone.

[0025] Preferably, the hydroxybenzophenone is 2-hydroxybenzophenone, the phenylbenzophenone is 2,2-phenylbenzophenone, and the halogenated benzophenone is at least one of brominated benzophenone, chlorobenzophenone, fluorobenzophenone, and iodinated benzophenone.

[0026] Preferably, the acid value of the dispersant is within the range of one or 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, and 60 mgKOH / mol.

[0027] When the acid value of the dispersant is maintained within the above range, it can not only effectively achieve high compatibility and high dispersibility of itself and its components in polycarbonate, but also effectively achieve synergistic effect with the voltage stabilizer to jointly improve the CTI electrical performance of the product without affecting the light aging resistance of the product.

[0028] More preferably, the acid value of the dispersant is obtained by testing using ASTM D1386-15-2022.

[0029] More preferably, the number average molecular weight of the dispersant is 1,000 to 25,000, and even more preferably 2,500 to 5,000.

[0030] More preferably, the number average molecular weight of the dispersant is in the range of one or any two of 2500, 2800, 3000, 3200, 3500, 3800, 4000, 4200, 4500, 4800, and 5000.

[0031] More preferably, the number average molecular weight of the dispersant is 3500-4500.

[0032] The number average molecular weight of the dispersant is determined by viscosity method according to SH / T 0398-2007.

[0033] More preferably, the dispersant has a melt flow rate of 10 to 150 g / 10 min at 300° C. and a load of 1.2 kg according to ISO 1133-2012.

[0034] More preferably, the dispersant has a melt flow rate of 10 to 70 g / 10 min at 300° C. and a load of 1.2 kg according to ISO 1133-2012.

[0035] More preferably, the dispersant has a melt flow rate at 300° C. and a load of 1.2 kg according to ISO 1133-2012 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, or 70 g / 10 min, or any two of these ranges.

[0036] More preferably, the dispersant has a melt flow rate of 10 to 15 g / 10 min at 300° C. and a load of 1.2 kg according to ISO 1133-2012.

[0037] Preferably, in the polycarbonate composition, the ratio of the voltage stabilizer to the dispersant is (2:1) to (600:1).

[0038] Preferably, in the polycarbonate composition, the weight ratio of the voltage stabilizer to the dispersant is in the range of one or any two 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, and 600:1.

[0039] Preferably, in the polycarbonate composition, the weight ratio of the voltage stabilizer to the dispersant is (5-20):1.

[0040] Under the above ratio, the two can effectively inhibit the local charge accumulation of polycarbonate and also achieve the best light aging resistance.

[0041] Preferably, the polycarbonate is bisphenol A polycarbonate.

[0042] Preferably, the polycarbonate ISO1133-2012 has a melt flow rate of 3 to 20 g / 10 min at 300° C. and a load of 1.2 kg.

[0043] Preferably, the number average molecular weight of the polycarbonate is 22,000 to 30,000.

[0044] Preferably, the number average molecular weight of the polycarbonate is within the range of one or any two of 22,000, 24,000, 25,000, 28,000 and 30,000.

[0045] The number average molecular weight of the polycarbonate of the present invention can be directly measured by gel permeation chromatography.

[0046] More preferably, the polycarbonate has a terminal hydroxyl content of less than 100 ppm and a BPA content of less than 20 ppm.

[0047] Preferably, the toughening agent is at least one of PDMS (polydimethylsiloxane)-carbonate copolymer, SAN grafted PDMS rubber, MMA grafted PMDS rubber, and MMA grafted silicone rubber.

[0048] More preferably, the toughening agent has a melt index of 5 to 15 g / 10 min at 300° C. and a load of 1.2 kg according to ISO 1133-2012.

[0049] Preferably, the flame retardant is a halogen-free flame retardant.

[0050] More preferably, the halogen-free flame retardant is at least one of a phosphorus-based flame retardant, a sulfonate flame retardant, an organosilicon flame retardant, and an inorganic filler flame retardant.

[0051] More preferably, the halogen-free flame retardant is a phosphorus-based flame retardant, and the phosphorus content of the phosphorus-based flame retardant is ≥10 wt %.

[0052] 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, and phosphate.

[0053] Preferably, the anti-dripping agent is at least one of polytetrafluoroethylene and styrene-acrylonitrile copolymer.

[0054] More preferably, the components of the polycarbonate further include at least one of 0.01 to 1 part of an antioxidant, 0.01 to 1 part of a lubricant, 0.01 to 1 part of a reinforcing filler, and 0.01 to 1 part of a colorant.

[0055] Based on the actual needs of the product, those skilled in the art can appropriately introduce some components commonly introduced into 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 give the product various colors, etc.

[0056] Another object of the present invention is to provide a method for preparing the aging-resistant insulating polycarbonate composition, comprising the following steps:

[0057] After the components are uniformly mixed, they are melt-extruded and granulated in a twin-screw extruder to obtain the aging-resistant and insulating polycarbonate composition.

[0058] The preparation method of the polycarbonate composition of the present invention has simple operating steps and can realize industrial-scale production.

[0059] Preferably, the temperature range of the twin-screw extruder is set to: 220-280°C, the screw speed is 200-600r / min, and the screw length-diameter ratio is 48:1.

[0060] Another object of the present invention is to provide use of the aging-resistant insulating polycarbonate composition in the preparation of photovoltaic plug-ins.

[0061] The polycarbonate composition of the present invention has excellent CTI electrical properties and flame retardant properties, and 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 above, the impact strength retention rate at -30 ℃ can reach more than 50%, and the impact strength retention rate after 1000 hours of irradiation under a xenon lamp can reach more than 50%. The comprehensive performance is excellent, and it is very suitable for the preparation of photovoltaic plug-ins that need to avoid high-voltage tracking failure and require certain light environment resistance.

[0062] The beneficial effect of the present invention is that the present invention provides an aging-resistant insulating polycarbonate composition. The product, through the combination of specific types of voltage stabilizers and dispersants, can not only effectively improve the CTI electrical performance of the product, making the CTI 400V ≥ 50 drops, but also has excellent flame retardant properties and sufficient light aging resistance, and is very suitable for the preparation of photovoltaic plug-ins. DETAILED DESCRIPTION

[0063] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments and comparative examples. Its purpose is to understand the content of the present invention in detail, rather than to limit the present invention. All other embodiments obtained by those of ordinary skill in the art without making creative work premise all fall within the protection scope of the present invention. The experimental reagents and instruments involved in the implementation of the present invention are all conventional common reagents and instruments unless otherwise specified.

[0064] Examples 1 to 20

[0065] An embodiment of an aging-resistant insulating polycarbonate composition and its application according to the present invention is provided. The components of the polycarbonate composition are shown in Table 1.

[0066] The preparation method of the polycarbonate composition comprises the following steps:

[0067] All the components in the formula are mixed uniformly in a high-speed mixer, and then fed into a twin-screw extruder from a main feeding port for melt blending, extrusion and granulation to obtain the polycarbonate composition.

[0068] When the components are melt-blended and extruded, the temperature zones of the twin-screw extruder are set to 200-220°C in zone 1, 210-230°C in zone 2, 215-235°C in zone 3, 215-235°C in zone 4, 215-235°C in zone 5, 220-245°C in zone 6, 220-245°C in zone 7, 220-245°C in zone 8, 220-240°C in zone 9, 220-240°C in zone 10, 210-230 in zone 11, and 200-220°C in zone 12. The screw speed is 400 rpm and the screw aspect ratio is 48:1.

[0069] Comparative Examples 1 to 9

[0070] The difference between the comparative examples and the examples is only in the types and proportions of the components, as shown in Table 2.

[0071] Among the components described in each embodiment and comparative example,

[0072] The polycarbonate 1 is 1300-03NP, produced by LG Chem, with a melt flow rate of 3.5 g / 10 min at 300° C. and a load of 1.2 kg, a number average molecular weight of 30,000, a terminal hydroxyl group content of less than 100 ppm, and a BPA content of less than 20 ppm;

[0073] The polycarbonate 2 is 1300-10NP, produced by LG Chem, with a melt flow rate of 11.5 g / 10 min at 300° C. and a load of 1.2 kg, a number average molecular weight of 26,500, a terminal hydroxyl content of less than 100 ppm, and a BPA content of less than 20 ppm;

[0074] The polycarbonate 3 is 1300-22NP, produced by LG Chem, with a melt flow rate of 23.2 g / 10 min at 300° C. and a load of 1.2 kg, a number average molecular weight of 22,000, a terminal hydroxyl group content of less than 100 ppm, and a BPA content of less than 20 ppm;

[0075] The toughening agent 1 is AC9144, a PDMS-carbonate copolymer produced by Cangzhou Dahua, with a melt index of 10.2 g / 10 min at 300° C. and a load of 1.2 kg according to ISO1133;

[0076] The toughening agent 2 is S2130, MMA grafted silicone rubber, produced by Mitsubishi Chemical of Japan, with a melt index of 5.9 g / 10 min at 300°C and 1.2 kg load according to ISO1133;

[0077] The flame retardant is a halogen-free phosphorus flame retardant phosphate ester with a phosphorus content of 9.1 wt%, and is a PX200 product produced by Daihachi, Japan.

[0078] The anti-dripping agent is commercially available polytetrafluoroethylene;

[0079] The voltage stabilizer 1 is commercially available 2-hydroxybenzophenone;

[0080] The voltage stabilizer 2 is commercially available 2,2-phenyl benzophenone;

[0081] The voltage stabilizer 3 is commercially available benzoic acid;

[0082] The voltage stabilizer 4 is a commercially available phosphite;

[0083] The voltage stabilizer 5 is commercially available 2-bromobenzophenone;

[0084] The voltage stabilizer 6 is commercially available benzophenone;

[0085] The dispersant 1 is 2203, produced by Mitsui, Japan, oxidized polyethylene wax, with 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 and a load of 1.2 kg;

[0086] The dispersant 2 is Polywax 2000, produced by Nucera, an oxidized polyethylene wax with 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. and a load of 1.2 kg;

[0087] The dispersant 3 is AC330, produced by Honeywell, an oxidized polyethylene wax with 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 and a load of 1.2 kg;

[0088] The dispersant 4 is 1105A, produced by Mitsui, Japan, oxidized polyethylene wax, with 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 and a load of 1.2 kg;

[0089] The dispersant 5 is AC325, produced by Honeywell, an oxidized polyethylene wax, with 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 and a load of 1.2 kg;

[0090] The dispersant 6 is C6112, produced by Nucera, an oxidized polyethylene wax, with 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 and a load of 1.2 kg;

[0091] The dispersant 7 is NF308, produced by Mitsui, Japan, maleic anhydride grafted polypropylene, the acid value is about 30 mgKOH / mol, and the melt flow rate at 190°C and 2.16 kg load is 100 g / 10 min;

[0092] The dispersant 8 is PETS and GLYCOBEP produced by Lonza.

[0093] Unless otherwise specified, the components and raw materials used in the examples and comparative examples of the present invention are all commercially available raw materials, and the components and raw materials used in each parallel experiment are all of the same kind.

[0094] Table 1

[0095] Table 2

[0096] In order to verify the performance of the polycarbonate composition of the present invention, the products prepared in each embodiment and comparative example were subjected to the following performance tests. The specific steps are as follows:

[0097] (1) Room temperature IZOD notched impact strength test: According to ASTM D256-2010, each product was injection molded into an impact specimen with a size of 3.2 mm and tested using a V-notch with an impact strength of 1.25 J.

[0098] (2) Xenon lamp 1000h aging notched impact strength retention test: After the specimens were placed under a xenon lamp for 1000h (irradiation intensity: 0.51W / m2@340nm), each product was injection molded into an impact specimen according to ASTMD275 standard, with a size of 3.2mm, and tested using a V-notch, with an impact capacity of 1.25J; the results of this step test were combined with the test results of step (1) to calculate the retention rate (%);

[0099] (3) 1.5mm flame retardant grade test: tested and determined according to UL94-2023 standard;

[0100] (4) CTI 400V test: Test and judge according to ASTM D3638 standard.

[0101] The test results are shown in Tables 3 and 4.

[0102] Table 3

[0103] Table 4

[0104] From Table 3 and Table 4, it can be seen that the impact strength of the polycarbonate composition of the present invention is relatively high at room temperature, which can reach 600 J / m2 And above, at the same time, it has good light aging resistance, the impact strength retention rate after 1000h xenon lamp aging reaches more than 50%, the CTI failure drop number at 400V is ≥50 drops, and the flame retardancy level is V-0, with excellent electrical insulation and flame retardancy. In contrast, the products of Comparative Example 1 and Comparative Example 5 do not introduce voltage stabilizer and dispersant respectively, and the CTI performance and light aging resistance of the products are less than ideal. According to the comparison of the products of Example 1, Examples 10-11, Examples 12-13 and Comparative Examples 2 and 6, it can be seen that the addition amount of these two components cannot be too much, otherwise it will cause the weakening of various aspects of the product performance. From the performance comparison of the products of Example 1 and Examples 14-17, it can be seen that when the total amount of the two components added is certain, when the ratio of the two components meets (5-20):1, the comprehensive performance of the product is better. From the product performance results of Example 1, Example 6, and Comparative Examples 3-4, it can be seen that the use of conventional types of voltage stabilizers cannot truly take into account the compatibility with the matrix resin, and cannot be well matched with the dispersant. The CTI performance and light aging resistance of the products are both unsatisfactory. According to the comparison of the products of Example 1 with those of Comparative Examples 9 and 10, if an existing commercially available more conventional processing dispersant or another polyolefin is used as a dispersant, it may not be possible to achieve the same performance improvement as the dispersant type described in the present invention. 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, the acid value of the product needs to be strictly controlled within the range of 30-60 mKOH / mol (preferably 35-55 mKOH / mol). Otherwise, not only will the compatibility of the components of the product fail to be improved, but the CTI performance of the product may even be negatively affected.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

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

2. The polycarbonate composition according to claim 1, wherein The benzophenone derivative includes at least one of hydroxybenzophenone, phenylbenzophenone and halogenated benzophenone.

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

4. The polycarbonate composition according to claim 1, wherein The number average molecular weight of the dispersant is 1000 to 25000, and the melt flow rate at 300° C. and 1.2 kg load according to ISO1133-2012 is 10 to 150 g / 10 min.

5. The polycarbonate composition according to claim 1, wherein In the polycarbonate composition, the weight ratio of the voltage stabilizer to the dispersant is (5-20):

1.

6. The polycarbonate composition according to claim 1, wherein The polycarbonate has a melt flow rate of 3 to 26 g / 10 min at 300° C. and a load of 1.2 kg according to ISO 1133-2012, and a number average molecular weight of 22,000 to 30,000.

7. The polycarbonate composition according to claim 1, wherein The toughening agent is at least one of PDMS (polydimethylsiloxane)-carbonate copolymer, SAN grafted PDMS rubber, and MMA grafted PMDS rubber.

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

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

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

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