Polycarbonate composite material for 5g base station and preparation method thereof

Abstract

The present application relates to the technical field of 5G base station polymeric materials, and specifically relates to a polycarbonate composite material for 5G base stations and a preparation method thereof.The polycarbonate composite material is composed of the following components by weight: 90-95 parts by weight of polycarbonate polymer; 0.2-0.4 parts by weight of antioxidant; 0.5-1.0 parts by weight of lubricant; 3-5 parts by weight of toughening agent; 0.05-0.2 parts by weight of sulfonate flame retardant; 0.3-0.5 parts by weight of anti-dripping agent; and 1-3 parts by weight of anti-UV agent; wherein the polycarbonate polymer comprises high-molecular-weight aromatic polycarbonate and aliphatic polycarbonate, the content of the high-molecular-weight aromatic polycarbonate in the polycarbonate polymer is not less than 30 wt%, and the weight-average molecular weight of the high-molecular-weight aromatic polycarbonate is not less than 25000.In the present application, the composition and ratio of the polycarbonate material in the composite material are adjusted, and the flame retardant and anti-UV agent are optimized accordingly, so that the composite material is comprehensively improved in terms of tensile strength, bending strength, impact strength, and anti-aging performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polymeric materials for 5G base stations, in particular to a polycarbonate composite material for 5G base stations and a preparation method thereof. BACKGROUND

[0002] With the continuous development of communication technology, new demands are put forward for polymer materials in this field. The propagation speed of 5G signals is extremely fast, but the penetration is low, and a large number of indoor and outdoor equipment needs to be laid, and the number of base stations may increase by more than 10 times. However, with the increase of communication signal rate, the adjustment of communication wave band causes the signal penetration to weaken, and it is easy to be disturbed by external materials and other problems, which also puts forward new requirements for polymer materials used in 5G base stations. In addition to the traditional high-temperature resistance, flame resistance, mechanical strength, aging resistance and other properties, the related materials are required to have properties including but not limited to low dielectric, low loss, high impact, high heat distortion temperature and the like. Polycarbonate resin materials are currently widely used in communication base stations. In order to improve the mechanical strength, heat resistance, hardness and other properties of the traditional polycarbonate composite material, glass fibers, PBT resin, ABS resin and other components are added. However, the addition of these composite resins and other auxiliary components can improve the performance of the composite material in some aspects to a certain extent, but it will also affect the transparency, dielectric loss and other properties of the composite material. Moreover, the addition of the above-mentioned composite components will also affect the processing method of the material to a certain extent, and the environmental protection and energy consumption need to be further improved. Therefore, it is necessary to develop a polycarbonate composite material for 5G base stations, which has excellent comprehensive performance under the premise of adding as few other components as possible based on polycarbonate resin as the base resin material. SUMMARY

[0003] In view of the above technical problems, the present application provides a polycarbonate composite material for 5G base stations, wherein different molecular structures and different molecular weights of polycarbonate resins are compounded as base resins, and then the other auxiliary components of the composite material are optimized and adjusted accordingly, so that the polycarbonate composite material has good mechanical strength, excellent flame retardant performance and aging resistance without adding other resin composites and with a small amount of auxiliary components.

[0004] Specifically, the first aspect of the present application provides a polycarbonate composite material for 5G base stations, which is composed of the following components by weight:

[0005] 90-95 parts by weight of polycarbonate polymer;

[0006] 0.2-0.4 parts by weight of antioxidant;

[0007] 0.5-1.0 parts by weight of lubricant;

[0008] 3.0-5.0 parts by weight of a toughening agent;

[0009] 0.05-0.2 parts by weight of a sulfonate flame retardant;

[0010] 0.3-0.5 parts by weight of an anti-dripping agent;

[0011] 1.0-3.0 parts by weight of an anti-UV agent;

[0012] wherein the polycarbonate polymer comprises high molecular weight aromatic polycarbonate and aliphatic type polycarbonate, the content of the high molecular weight aromatic polycarbonate in the polycarbonate polymer is not less than 30 wt%, and the weight average molecular weight of the high molecular weight aromatic polycarbonate is not less than 25000.

[0013] As a preferred technical solution of the present application, the weight average molecular weight of the high molecular weight aromatic polycarbonate is 30000-52000.

[0014] As a preferred technical solution of the present application, the weight average molecular weight of the aliphatic type polycarbonate is 20000-60000.

[0015] As a preferred technical solution of the present application, the polycarbonate polymer further comprises low molecular weight aromatic polycarbonate, and the weight average molecular weight of the low molecular weight aromatic polycarbonate is not higher than 30000; preferably, the weight average molecular weight of the low molecular weight aromatic polycarbonate is 20000-30000.

[0016] As a preferred technical solution of the present application, the melt index of the low molecular weight aromatic polycarbonate at 300℃, 1.2kg is 7-13g / 10min.

[0017] As a preferred technical solution of the present application, the weight ratio of the high molecular weight aromatic polycarbonate, the low molecular weight aromatic polycarbonate and the aliphatic type polycarbonate is (3-4):5:(0.5-2).

[0018] As a preferred technical solution of the present application, the toughening agent is MMA grafted crosslinked silicone acrylate.

[0019] As a preferred technical solution of the present application, the anti-UV agent is a composite of equal weight of benzotriazole anti-UV agent and triazine anti-UV agent.

[0020] As a preferred technical solution of the present application, the sulfonate flame retardant is selected from one or more of benzenesulfonyl phenyl sulfonate potassium, perfluorobutyl sulfonate potassium, and 2,4,5-trichlorobenzene sulfonate sodium.

[0021] The second aspect of the present application provides a method for preparing the polycarbonate composite material as described above, comprising the following steps: mixing the polycarbonate polymer, antioxidant, lubricant, sulfonate flame retardant, anti-dripping agent and anti-UV agent in a mixer, and then adding them into a twin-screw extruder for melt extrusion.

[0022] Compared with the prior art, the technical solution provided by the present application has the following beneficial effects:

[0023] In the present application, by adjusting the composition and ratio of the polycarbonate material in the composite material, and optimizing the flame retardant and anti-UV agent, the prepared polycarbonate composite material is comprehensively improved in tensile strength, bending strength, impact strength and anti-aging performance. In addition, the applicant also conducts a heat deformation test on the PC alloy material in the above embodiment, and the heat deformation temperature of all materials is basically above 120 DEG C, which can be widely used in harsh high-temperature outdoor environments. Moreover, the content of the auxiliary components in the entire material formula system is not more than 10wt%, and the composite material retains the properties of polycarbonate as much as possible while achieving the above modifications, so that the composite material can be widely used in the field of 5G base stations. DETAILED DESCRIPTION

[0024] When the content, amount, or other values or parameters in the present application are expressed in a range, a preferred range, or a range defined by a series of upper and lower preferred values, it should be understood that all ranges formed by any pair of upper and lower values of the range are specifically disclosed, regardless of whether the range is disclosed separately. For example, when the range "2-8" is disclosed, the described range should be interpreted as including the range "2-8", "2-7", "2-6", "2-5 and 6,7", "2-3 and 4-8", etc.

[0025] When a numerical range is described herein, unless otherwise stated, the range is intended to include its end values and all integers and fractions within the range. The singular form includes a plurality of discussion objects, unless the context clearly indicates otherwise. "Optional" or "any one" means that the matter or event described thereafter can occur or not occur, and the description includes the case where the event occurs and the case where the event does not occur.

[0026] The polycarbonate composite material for 5G base stations provided in the present application uses polycarbonate resins with different molecular structures and different molecular weights to be compounded as the base resin, and then the other auxiliary components of the composite material are correspondingly optimized and adjusted to obtain the polycarbonate composite material of the present application.

[0027] The polycarbonate composite material described in the present application is composed of the following components by weight:

[0028] 90-95 parts by weight of polycarbonate polymer;

[0029] 0.2-0.4 parts by weight of antioxidant;

[0030] 0.5-1.0 parts by weight of lubricant;

[0031] 3-5 parts by weight of toughening agent;

[0032] 0.05-0.2 parts by weight of sulfonate flame retardant;

[0033] 0.3-0.5 parts by weight of anti-dripping agent;

[0034] 1-3 parts by weight of anti-UV agent.

[0035] The polycarbonate polymer is PC resin material, and the application can use polycarbonate materials known to those skilled in the art, including but not limited to bisphenol A type polycarbonate, bisphenol F type polycarbonate, etc., which can be prepared by methods known to those skilled in the art, or obtained by commercial means. The specific source of the polycarbonate resin material is not specially limited. The polycarbonate polymer in the application includes high molecular weight aromatic polycarbonate and aliphatic polycarbonate; the high molecular weight in the high molecular weight aromatic polycarbonate is only relatively low compared with other molecular weights in the application, and the weight average molecular weight of the high molecular weight aromatic polycarbonate is not less than 25000; the weight average molecular weight is a physical quantity for measuring the length of the polycarbonate molecular chain segment, which can be tested and confirmed according to methods known to those skilled in the art, including but not limited to GPC gel permeation chromatography, etc.; the aromatic polycarbonate refers to a carbonate type high molecular polymer containing an aromatic group in the molecular chain; the content of the high molecular weight aromatic polycarbonate in the polycarbonate polymer is not less than 30wt%.

[0036] Further preferably, the weight average molecular weight of the high molecular weight aromatic polycarbonate is 30000-52000, which can be 30000, 32000, 35000, 38000, 40000, 42000, 45000, 48000, 50000, 52000, etc.; preferably, the weight average molecular weight of the high molecular weight aromatic polycarbonate is 35000-50000; the specific source of the high molecular weight aromatic polycarbonate meeting the above requirements is not specially limited in the application, and can include but is not limited to FB2560 polycarbonate material of Saudi Basic Chemical Company and 7072R polycarbonate material of Mitsubishi Chemical.

[0037] Further preferably, the weight average molecular weight of the aliphatic polycarbonate is 20000-60000, and for example, the weight average molecular weight of the aliphatic polycarbonate is 20000, 22000, 25000, 27000, 28000, 30000, 32000, 35000, 38000, 40000, 42000, 45000, 48000, 50000, 52000, 55000, 57000, 60000, etc. Further, the weight average molecular weight of the aliphatic polycarbonate is 30000-40000, and preferably, the aliphatic polycarbonate is selected from polycarbonate resins. In the present application, the specific source of the aliphatic polycarbonate satisfying the above requirements is not particularly limited, and polycarbonate resins from Changchun Research Institute of Chemical Industry, etc. can be used.

[0038] In some preferred embodiments of the present application, the polycarbonate polymer further comprises a low molecular weight aromatic polycarbonate, which is only relatively low in molecular weight compared with other polycarbonates in the present application. The weight average molecular weight of the low molecular weight aromatic polycarbonate is not higher than 30000, and for example, the weight average molecular weight of the low molecular weight aromatic polycarbonate is 30000, 28000, 25000, 23000, 22000, 20000, 18000, 15000, 12000, 10000, etc. Preferably, the weight average molecular weight of the low molecular weight aromatic polycarbonate is 20000-30000. Preferably, the melt index of the low molecular weight aromatic polycarbonate at 300℃ under 1.2kg is 7-13g / 10min, and for example, the melt index of the low molecular weight aromatic polycarbonate at 300℃ under 1.2kg is 7g / 10min, 7.5g / 10min, 8g / 10min, 8.5g / 10min, 9g / 10min, 9.5g / 10min, 10g / 10min, 10.5g / 10min, 11g / 10min, 11.5g / 10min, 12g / 10min, 12.5g / 10min, 13g / 10min, etc. In the present application, the specific source of the low molecular weight aromatic polycarbonate satisfying the above requirements is not particularly limited, and for example, the low molecular weight aromatic polycarbonate can be selected from A1105 polycarbonate products from Wanhua Chemical Group Co., Ltd.

[0039] In some preferred embodiments of the present application, the weight ratio of the high molecular weight aromatic polycarbonate, the low molecular weight aromatic polycarbonate and the aliphatic polycarbonate is (3-4):5:(0.5-2), and for example, the weight ratio of the high molecular weight aromatic polycarbonate, the low molecular weight aromatic polycarbonate and the aliphatic polycarbonate is 3:5:0.5, 3.5:5:0.5, 4:5:0.5, 3:5:1, 3:5:1.5, 3:5:2, 3:5:1.8, 3.5:5:0.8, 3.5:5:1.2, etc.

[0040] The 5G base station polycarbonate composite material of the present application contains an antioxidant. The weight of the antioxidant is 0.2-0.4 parts by weight based on 90-95 parts by weight of polycarbonate polymer. The weight of the antioxidant can be 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, etc. The specific selection of the antioxidant in the present application is not particularly limited, and the antioxidant can be selected according to the antioxidant known to those skilled in the art, including but not limited to one or a combination of hindered phenolic antioxidants, phosphite antioxidants, thioester antioxidants, furan antioxidants, hydroxylamine antioxidants, etc. For example, antioxidant RIANOX 245, antioxidant RIANOX 636, etc.

[0041] The 5G base station polycarbonate composite material of the present application contains a lubricant. The weight of the lubricant is 0.5-1 parts by weight based on 90-95 parts by weight of polycarbonate polymer. The weight of the lubricant can be 0.5 parts, 0.55 parts, 0.6 parts, 0.65 parts, 0.7 parts, 0.75 parts, 0.8 parts, 0.85 parts, 0.9 parts, 0.95 parts, 1.0 parts, etc. Preferably, the lubricant is a silicone lubricant or a polymer wax lubricant, and both can be used together. The polymer wax can be various polymer wax components known to those skilled in the art, such as polyethylene wax, microcrystalline wax, etc., which can be selected and used as needed by those skilled in the art.

[0042] The 5G base station polycarbonate composite material of the present application contains a toughening agent. The weight of the toughening agent is 3-5 parts by weight based on 90-95 parts by weight of polycarbonate polymer. The weight of the toughening agent can be 3 parts, 3.2 parts, 3.5 parts, 3.8 parts, 4.0 parts, 4.2 parts, 4.5 parts, 4.8 parts, 5.0 parts, etc. Preferably, the toughening agent includes MMA grafted crosslinked silicone acrylate. Further preferably, the toughening agent also includes an acrylate graft copolymer with a core-shell structure. Preferably, the MMA grafted crosslinked silicone acrylate and the acrylate graft copolymer with a core-shell structure have the same weight. The specific selection of the MMA grafted crosslinked silicone acrylate and the acrylate graft copolymer with a core-shell structure in the present application is not particularly limited, and the products known to those skilled in the art or commercially available can be used, such as the MMA grafted crosslinked silicone acrylate with the trade name LP2088 from Guangzhou Enteng Innovative Materials Co., Ltd., such as the KANE FM-40 acrylate graft copolymer with a core-shell structure, etc.

[0043] The 5G base station polycarbonate composite material of the present invention contains a sulfonate flame retardant. Based on 90-95 parts by weight of polycarbonate polymer, the sulfonate flame retardant comprises 0.05-0.2 parts by weight. Examples of such sulfonate flame retardants include 0.05 parts by weight, 0.06 parts by weight, 0.07 parts by weight, 0.08 parts by weight, 0.09 parts by weight, 0.10 parts by weight, 0.11 parts by weight, 0.12 parts by weight, 0.13 parts by weight, 0.14 parts by weight, 0.15 parts by weight, 0.16 parts by weight, and 0.17 parts by weight. The amounts are 0.18 parts by weight, 0.19 parts by weight, 0.2 parts by weight, etc.; more preferably, the sulfonate flame retardant is selected from one or more of potassium benzenesulfonylbenzenesulfonate, potassium perfluorobutylsulfonate, and sodium 2,4,5-trichlorobenzenesulfonate; more preferably, the sulfonate flame retardant is a compound of potassium benzenesulfonylbenzenesulfonate and potassium perfluorobutylsulfonate; more preferably, the weight ratio of potassium benzenesulfonylbenzenesulfonate and potassium perfluorobutylsulfonate is 1:(1-2), and examples include 1:1, 1:1.2, 1:1.5, 1:1.8, 1:2, etc. The specific source of the above-mentioned sulfonate flame retardant components is not specifically limited in this invention, and can be based on commercially available products known to those skilled in the art.

[0044] The 5G base station polycarbonate composite material of the present invention contains a UV stabilizer. Based on 90-95 parts by weight of polycarbonate polymer, the UV stabilizer is 1-3 parts by weight. Examples of the UV stabilizer's weight are 1.0 parts by weight, 1.2 parts by weight, 1.5 parts by weight, 1.8 parts by weight, 2.0 parts by weight, 2.2 parts by weight, 2.5 parts by weight, 2.8 parts by weight, 3.0 parts by weight, etc. More preferably, the UV stabilizer is a complex of equal weights of benzotriazole UV stabilizer and triazine UV stabilizer. Examples of the benzotriazole UV stabilizer include 2-(2'-hydroxy-3',5'-di-tert-amylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole, etc.; and the triazine UV stabilizer includes hydroxyphenyltriazine, triazine (HPT), etc.

[0045] The 5G base station polycarbonate composite material of the present invention contains an anti-drip agent. Based on 90-95 parts by weight of polycarbonate polymer, the anti-drip agent is 0.3-0.5 parts by weight. For example, the anti-drip agent is 0.3 parts by weight, 0.32 parts by weight, 0.35 parts by weight, 0.38 parts by weight, 0.40 parts by weight, 0.42 parts by weight, 0.45 parts by weight, 0.48 parts by weight, 0.50 parts by weight, etc. More preferably, the anti-drip agent is at least one of polytetrafluoroethylene micro powder, polytetrafluoroethylene particles, and polytetrafluoroethylene masterbatch with acrylonitrile-styrene copolymer, polycarbonate, or acrylonitrile-styrene-butadiene copolymer as a carrier.

[0046] The preparation method of the above-mentioned 5G base station polycarbonate composite material of the present invention includes the following steps: mixing the polycarbonate polymer, antioxidant, lubricant, sulfonate flame retardant, anti-dripping agent and anti-UV agent in a mixer, and then adding the mixture to a twin-screw extruder for melt extrusion. The present invention does not impose special limitations on the specific process parameters and conditions in the preparation process of the above-mentioned composite material. It can be that the raw materials measured according to the proportion are poured into a mixer and mixed evenly, then placed in a twin-screw extruder, and the rotational speed of the twin screws is adjusted (e.g., 300 rpm to 800 rpm), and the temperature of each zone of the screws is set to 285 to 300°C. Other parameters can be adjusted accordingly based on actual needs and methods well known to those skilled in the art.

[0047] The present invention will now be described in detail through embodiments. It should be noted that the following embodiments are only for further illustration of the present invention and should not be construed as limiting the scope of protection of the present invention. Non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention still fall within the scope of protection of the present invention.

[0048] Example 1

[0049] This embodiment provides a polycarbonate composite material for 5G base stations, which is composed of the following components in parts by weight:

[0050] 95 parts by weight of polycarbonate polymer;

[0051] 0.3 parts by weight of antioxidant;

[0052] 0.8 parts by weight of lubricant;

[0053] 4 parts by weight of toughening agent;

[0054] 0.1 parts by weight of sulfonate flame retardant;

[0055] 0.4 parts by weight of anti-dripping agent;

[0056] 2 parts by weight of UV stabilizer;

[0057] The polycarbonate polymer is composed of high molecular weight aromatic polycarbonate, low molecular weight aromatic polycarbonate, and aliphatic polycarbonate in a weight ratio of 3.5:5:1.5. The high molecular weight aromatic polycarbonate has a weight-average molecular weight of 50,000 and uses FB2560 polycarbonate material from Saudi Basic Chemicals. The low molecular weight aromatic polycarbonate has a weight-average molecular weight of 23,000 and a melt index of 9 g / 10 min at 300°C and 1.2 kg, using A1105 polycarbonate product from Wanhua Chemical Group Co., Ltd. The aliphatic polycarbonate has a weight-average molecular weight of 35,000 and uses polypropylene carbonate resin from Changchun Institute of Applied Chemistry. The antioxidant is RIANOX 245. The lubricant is the silicone lubricant FEIDIAN. GM-3200; the toughening agent is composed of equal weights of MMA-grafted crosslinked silicone acrylate (LP2088 from Guangzhou Entropy Energy Innovation Materials Co., Ltd.) and a core-shell structured acrylate graft copolymer (KANE from Hangzhou Zhongju Chemical Co., Ltd.). The composition is FM-40; the sulfonate flame retardant is composed of potassium benzenesulfonylbenzenesulfonate and potassium perfluorobutylsulfonate in a weight ratio of 1:1.5; the anti-dripping agent is polytetrafluoroethylene micro powder; the UV retardant is composed of equal weights of benzotriazole UV retardant and triazine (HPT) UV retardant.

[0058] Example 2

[0059] This embodiment provides a polycarbonate composite material for 5G base stations, which is composed of the following components in parts by weight:

[0060] 95 parts by weight of polycarbonate polymer;

[0061] 0.3 parts by weight of antioxidant;

[0062] 0.8 parts by weight of lubricant;

[0063] 4 parts by weight of toughening agent;

[0064] 0.1 parts by weight of sulfonate flame retardant;

[0065] 0.4 parts by weight of anti-dripping agent;

[0066] 2 parts by weight of UV stabilizer;

[0067] The polycarbonate polymer is composed of high molecular weight aromatic polycarbonate and aliphatic polycarbonate in a weight ratio of 3.5:1.5. The high molecular weight aromatic polycarbonate has a weight average molecular weight of 50,000 and uses FB2560 polycarbonate material from Saudi Basic Chemicals, while the aliphatic polycarbonate has a weight average molecular weight of 35,000 and uses polypropylene carbonate resin from Changchun Institute of Applied Chemistry. The antioxidant is RIANOX 245. The lubricant is FEIDIAN GM-3200, a silicone lubricant. The toughening agent consists of equal weights of MMA-grafted crosslinked silicone acrylate (LP2088 from Guangzhou Entropy Energy Innovation Materials Co., Ltd.) and a core-shell structured acrylate graft copolymer (KANE from Hangzhou Zhongju Chemical Co., Ltd.). The composition is FM-40; the sulfonate flame retardant is composed of potassium benzenesulfonylbenzenesulfonate and potassium perfluorobutylsulfonate in a weight ratio of 1:1.5; the anti-dripping agent is polytetrafluoroethylene micro powder; the UV retardant is composed of equal weights of benzotriazole UV retardant and triazine (HPT) UV retardant.

[0068] Example 3

[0069] This embodiment provides a polycarbonate composite material for 5G base stations, which is composed of the following components in parts by weight:

[0070] 95 parts by weight of polycarbonate polymer;

[0071] 0.3 parts by weight of antioxidant;

[0072] 0.8 parts by weight of lubricant;

[0073] 4 parts by weight of toughening agent;

[0074] 0.1 parts by weight of sulfonate flame retardant;

[0075] 0.4 parts by weight of anti-dripping agent;

[0076] 2 parts by weight of UV stabilizer;

[0077] The polycarbonate polymer is composed of high molecular weight aromatic polycarbonate and low molecular weight aromatic polycarbonate in a weight ratio of 3.5:5. The high molecular weight aromatic polycarbonate has a weight average molecular weight of 50,000 and uses FB2560 polycarbonate material from Saudi Basic Chemicals Co., Ltd. The low molecular weight aromatic polycarbonate has a weight average molecular weight of 23,000 and a melt index of 9 g / 10 min at 300°C and 1.2 kg, using A1105 polycarbonate product from Wanhua Chemical Group Co., Ltd. The antioxidant is RIANOX 245. The lubricant is FEIDIAN GM-3200, a silicone lubricant. The toughening agent consists of equal weights of MMA-grafted crosslinked silicone acrylate (LP2088 from Guangzhou Entropy Innovation Materials Co., Ltd.) and a core-shell structured acrylate graft copolymer (KANE from Hangzhou Zhongju Chemical Co., Ltd.). The composition is FM-40; the sulfonate flame retardant is composed of potassium benzenesulfonylbenzenesulfonate and potassium perfluorobutylsulfonate in a weight ratio of 1:1.5; the anti-dripping agent is polytetrafluoroethylene micro powder; the UV retardant is composed of equal weights of benzotriazole UV retardant and triazine (HPT) UV retardant.

[0078] Example 4

[0079] This embodiment provides a polycarbonate composite material for 5G base stations, which is composed of the following components in parts by weight:

[0080] 95 parts by weight of polycarbonate polymer;

[0081] 0.3 parts by weight of antioxidant;

[0082] 0.8 parts by weight of lubricant;

[0083] 4 parts by weight of toughening agent;

[0084] 0.1 parts by weight of sulfonate flame retardant;

[0085] 0.4 parts by weight of anti-dripping agent;

[0086] 2 parts by weight of UV stabilizer;

[0087] The polycarbonate polymer is composed of low molecular weight aromatic polycarbonate and aliphatic polycarbonate in a weight ratio of 5:1.5. The low molecular weight aromatic polycarbonate has a weight-average molecular weight of 23,000 and a melt index of 9 g / 10 min at 300°C and 1.2 kg, and uses Wanhua Chemical Group Co., Ltd.'s A1105 polycarbonate product. The aliphatic polycarbonate has a weight-average molecular weight of 35,000 and uses polypropylene carbonate resin from Changchun Institute of Applied Chemistry. The antioxidant is RIANOX 245. The lubricant is FEIDIAN GM-3200, a silicone lubricant. The toughening agent consists of equal weights of MMA-grafted crosslinked silicone acrylate (LP2088 from Guangzhou Entropy Energy Innovation Materials Co., Ltd.) and a core-shell structured acrylate graft copolymer (KANE from Hangzhou Zhongju Chemical Co., Ltd.). The composition is FM-40; the sulfonate flame retardant is composed of potassium benzenesulfonylbenzenesulfonate and potassium perfluorobutylsulfonate in a weight ratio of 1:1.5; the anti-dripping agent is polytetrafluoroethylene micro powder; the UV retardant is composed of equal weights of benzotriazole UV retardant and triazine (HPT) UV retardant.

[0088] Example 5

[0089] This embodiment provides a polycarbonate composite material for 5G base stations, which is composed of the following components in parts by weight:

[0090] 95 parts by weight of polycarbonate polymer;

[0091] 0.3 parts by weight of antioxidant;

[0092] 0.8 parts by weight of lubricant;

[0093] 4 parts by weight of toughening agent;

[0094] 0.1 parts by weight of sulfonate flame retardant;

[0095] 0.4 parts by weight of anti-dripping agent;

[0096] 2 parts by weight of UV stabilizer;

[0097] The polycarbonate polymer is composed of high molecular weight aromatic polycarbonate, low molecular weight aromatic polycarbonate, and aliphatic polycarbonate in a weight ratio of 3.5:5:1.5. The high molecular weight aromatic polycarbonate has a weight-average molecular weight of 30,000 and uses 7027R polycarbonate material (weight-average molecular weight 30,000) from Mitsubishi Chemical Corporation of Japan. The low molecular weight aromatic polycarbonate has a weight-average molecular weight of 23,000 and a melt index of 9 g / 10 min at 300°C and 1.2 kg, using A1105 polycarbonate product from Wanhua Chemical Group Co., Ltd. The aliphatic polycarbonate has a weight-average molecular weight of 35,000 and uses polypropylene carbonate resin from Changchun Institute of Applied Chemistry. The antioxidant is RIANOX 245. The lubricant is FEIDIAN, a silicone-based lubricant. GM-3200; the toughening agent is composed of equal weights of MMA-grafted crosslinked silicone acrylate (LP2088 from Guangzhou Entropy Energy Innovation Materials Co., Ltd.) and a core-shell structured acrylate graft copolymer (KANE from Hangzhou Zhongju Chemical Co., Ltd.). The composition is FM-40; the sulfonate flame retardant is composed of potassium benzenesulfonylbenzenesulfonate and potassium perfluorobutylsulfonate in a weight ratio of 1:1.5; the anti-dripping agent is polytetrafluoroethylene micro powder; the UV retardant is composed of equal weights of benzotriazole UV retardant and triazine (HPT) UV retardant.

[0098] Example 6

[0099] This embodiment provides a polycarbonate composite material for 5G base stations, which is composed of the following components in parts by weight:

[0100] 95 parts by weight of polycarbonate polymer;

[0101] 0.3 parts by weight of antioxidant;

[0102] 0.8 parts by weight of lubricant;

[0103] 4 parts by weight of toughening agent;

[0104] 0.1 parts by weight of sulfonate flame retardant;

[0105] 0.4 parts by weight of anti-dripping agent;

[0106] 2 parts by weight of UV stabilizer;

[0107] The polycarbonate polymer is composed of high molecular weight aromatic polycarbonate, low molecular weight aromatic polycarbonate, and aliphatic polycarbonate in a weight ratio of 3.5:5:1.5. The high molecular weight aromatic polycarbonate has a weight-average molecular weight of 50,000 and uses FB2560 polycarbonate material from Saudi Basic Chemicals. The low molecular weight aromatic polycarbonate has a weight-average molecular weight of 23,000 and a melt index of 9 g / 10 min at 300°C and 1.2 kg, using A1105 polycarbonate product from Wanhua Chemical Group Co., Ltd. The aliphatic polycarbonate has a weight-average molecular weight of 35,000 and uses polypropylene carbonate resin from Changchun Institute of Applied Chemistry. The antioxidant is RIANOX 245. The lubricant is FEIDIAN GM-3200, a silicone lubricant. The toughening agent is a core-shell structured acrylate graft copolymer (KANE from Hangzhou Zhongju Chemical Co., Ltd.). FM-40); the sulfonate flame retardant is composed of potassium benzenesulfonylbenzenesulfonate and potassium perfluorobutylsulfonate in a weight ratio of 1:1.5; the anti-dripping agent is polytetrafluoroethylene micro powder; the UV resistant agent is composed of equal weights of benzotriazole UV resistant agent and triazine (HPT) UV resistant agent.

[0108] Example 7

[0109] This embodiment provides a polycarbonate composite material for 5G base stations, which is composed of the following components in parts by weight:

[0110] 95 parts by weight of polycarbonate polymer;

[0111] 0.3 parts by weight of antioxidant;

[0112] 0.8 parts by weight of lubricant;

[0113] 4 parts by weight of toughening agent;

[0114] 0.1 parts by weight of sulfonate flame retardant;

[0115] 0.4 parts by weight of anti-dripping agent;

[0116] 2 parts by weight of UV stabilizer;

[0117] The polycarbonate polymer is composed of high molecular weight aromatic polycarbonate, low molecular weight aromatic polycarbonate, and aliphatic polycarbonate in a weight ratio of 3.5:5:1.5. The high molecular weight aromatic polycarbonate has a weight-average molecular weight of 50,000 and uses FB2560 polycarbonate material from Saudi Basic Chemicals. The low molecular weight aromatic polycarbonate has a weight-average molecular weight of 23,000 and a melt index of 9 g / 10 min at 300°C and 1.2 kg, using A1105 polycarbonate product from Wanhua Chemical Group Co., Ltd. The aliphatic polycarbonate has a weight-average molecular weight of 35,000 and uses polypropylene carbonate resin from Changchun Institute of Applied Chemistry. The antioxidant is RIANOX 245. The lubricant is the silicone lubricant FEIDIAN. GM-3200; the toughening agent is composed of equal weights of MMA-grafted crosslinked silicone acrylate (LP2088 from Guangzhou Entropy Energy Innovation Materials Co., Ltd.) and a core-shell structured acrylate graft copolymer (KANE from Hangzhou Zhongju Chemical Co., Ltd.). The composition is FM-40; the sulfonate flame retardant is potassium benzenesulfonylbenzenesulfonate; the anti-dripping agent is polytetrafluoroethylene micro powder; the UV resistant agent is composed of equal weights of benzotriazole UV resistant agent and triazine (HPT) UV resistant agent.

[0118] Example 8

[0119] This embodiment provides a polycarbonate composite material for 5G base stations, which is composed of the following components in parts by weight:

[0120] 95 parts by weight of polycarbonate polymer;

[0121] 0.3 parts by weight of antioxidant;

[0122] 0.8 parts by weight of lubricant;

[0123] 4 parts by weight of toughening agent;

[0124] 0.1 parts by weight of sulfonate flame retardant;

[0125] 0.4 parts by weight of anti-dripping agent;

[0126] 2 parts by weight of UV stabilizer;

[0127] The polycarbonate polymer is composed of high molecular weight aromatic polycarbonate, low molecular weight aromatic polycarbonate, and aliphatic polycarbonate in a weight ratio of 3.5:5:1.5. The high molecular weight aromatic polycarbonate has a weight-average molecular weight of 50,000 and uses FB2560 polycarbonate material from SABIC. The low molecular weight aromatic polycarbonate has a weight-average molecular weight of 23,000 and a melt index of 9 g / 10 min at 300°C and 1.2 kg, using A1105 polycarbonate product from Wanhua Chemical Group Co., Ltd. The aliphatic polycarbonate has a weight-average molecular weight of 10,000 and uses polypropylene carbonate resin from Changchun Institute of Applied Chemistry. The antioxidant is RIANOX 245. The lubricant is the silicone lubricant FEIDIAN. GM-3200; the toughening agent is composed of equal weights of MMA-grafted crosslinked silicone acrylate (LP2088 from Guangzhou Entropy Energy Innovation Materials Co., Ltd.) and a core-shell structured acrylate graft copolymer (KANE from Hangzhou Zhongju Chemical Co., Ltd.). The composition is FM-40; the sulfonate flame retardant is composed of potassium benzenesulfonylbenzenesulfonate and potassium perfluorobutylsulfonate in a weight ratio of 1:1.5; the anti-dripping agent is polytetrafluoroethylene micro powder; the UV retardant is composed of equal weights of benzotriazole UV retardant and triazine (HPT) UV retardant.

[0128] The applicant prepared the polycarbonate composite material in the above embodiments using a similar method. Specifically, the polycarbonate polymer, antioxidant, lubricant, sulfonate flame retardant, anti-dripping agent, and UV stabilizer were mixed in a mixer and then added to a twin-screw extruder. The mixture was melt-extruded to obtain eight test samples, designated as Sample 1 to Sample 8 (corresponding to Examples 1 to 8 in sequence). The obtained samples were tested, and the testing methods and results are as follows:

[0129] Tensile properties: Tested according to ISO 527 standard, with a tensile speed of 50 mm / min;

[0130] Bending strength: Tested according to ISO 178 standard, bending speed is 2 mm / min;

[0131] Notched impact strength: Tested according to ISO 180 / 1A standard, with a sample thickness of 4.0 mm;

[0132] Xenon lamp aging performance: tested according to ISO 4892-2:2013 cycle 1 standard, 1000H;

[0133] See Table 1 below for specific test results.

[0134] Table 1 Performance Test Results

[0135] Tensile strength / MPa Flexural strength / MPa Notched Charpy impact strength / (kJ / m 2 )]]> △E Example 1 66 92 72 1.7 Example 2 63 90 62 1.9 Example 3 62 94 56 1.6 Example 4 56 89 65 2.4 Example 5 65 86 68 2.2 Example 6 65 89 50 1.8 Example 7 66 88 67 2.8 Example 8 62 84 64 2.1

[0136] The experimental results above demonstrate that by adjusting the composition and proportions of the polycarbonate material in the composite material, and optimizing the flame retardants and UV stabilizers, the prepared polycarbonate composite material exhibits comprehensive improvements in tensile strength, flexural strength, impact strength, and anti-aging properties. Furthermore, the applicant conducted heat deformation tests on the PC alloy materials in the above embodiments. The heat deformation temperatures of all materials were generally 120°C or higher, enabling widespread application in harsh high-temperature outdoor environments. Moreover, the content of auxiliary components in the entire material formulation system does not exceed 10 wt%. While achieving the aforementioned modifications, the composite material retains as many of the inherent properties of polycarbonate as possible, allowing for widespread application in fields such as 5G base stations.

[0137] The foregoing description is merely an exemplary embodiment of this disclosure and should not be construed as limiting the scope of this disclosure. Any equivalent changes and modifications made in accordance with the teachings of this disclosure shall still fall within the scope of this disclosure. Those skilled in the art will readily conceive of other embodiments of this disclosure upon considering the specification and practicing the disclosure herein. This invention is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not described herein. The specification and embodiments are to be considered exemplary only, and the scope and spirit of this disclosure are defined by the claims.

Claims

1. A polycarbonate composite material for 5G base stations, characterized in that, It consists of the following components in parts by weight: 90-95 parts by weight of polycarbonate polymer; 0.2 to 0.4 parts by weight of antioxidant; 0.5~1.0 parts by weight of lubricant; 3.0~5.0 parts by weight of toughening agent; 0.05~0.2 parts by weight of sulfonate flame retardant; 0.3~0.5 parts by weight of anti-dripping agent; 1.0~3.0 parts by weight of UV stabilizer; The polycarbonate polymer is composed of high molecular weight aromatic polycarbonate, aliphatic polycarbonate and low molecular weight aromatic polycarbonate; the weight ratio of the high molecular weight aromatic polycarbonate, low molecular weight aromatic polycarbonate and aliphatic polycarbonate is (3~4):5:(0.5~2). The weight-average molecular weight of the high molecular weight aromatic polycarbonate is 35,000 to 50,000. The weight-average molecular weight of the aliphatic polycarbonate is 20,000-60,000. The weight-average molecular weight of the low molecular weight aromatic polycarbonate is 20,000 to 30,000. The low molecular weight aromatic polycarbonate has a melt index of 7~13g / 10min at 300℃ and 1.2kg. The toughening agent is composed of MMA-grafted cross-linked organosilicon acrylate and acrylate graft copolymer with a core-shell structure. The sulfonate flame retardant is composed of potassium benzenesulfonylbenzenesulfonate and potassium perfluorobutylsulfonate.

2. The polycarbonate composite material according to claim 1, characterized in that, The UV-resistant agent is a complex of equal weights of benzotriazole UV-resistant agents and triazine UV-resistant agents.