A high-strength and anti-aging cable and its preparation method

Abstract

The present invention relates to the technical field of cable preparation, and discloses a high-strength anti-aging cable and a preparation method thereof. This long-life cable sequentially includes, from the inside to the outside: a cable core, a shielding layer, and an outer sheath layer; the cable core is formed by stranding a copper core wrapped with a polytetrafluoroethylene film; the shielding layer is formed by wrapping a metal aluminum foil around the surface of the cable core; the outer sheath layer includes the following raw materials: polyvinyl chloride, anti-ultraviolet silicone rubber, heat stabilizer, filler, flame retardant, lubricant, dispersant, high-temperature resistant cross-linking agent; enabling the prepared cable to have excellent mechanical strength, high-temperature resistance, and excellent anti-ultraviolet effect, and can prevent problems such as cable breakage, melting droplets, and aging caused by insufficient mechanical strength, poor high-temperature resistance, and poor anti-ultraviolet effect during long-term outdoor work, significantly extending the service life of the cable.

Description

Technical Field

[0001] The present invention relates to the technical field of cable preparation, and in particular to a high-strength anti-aging cable and a preparation method thereof. Background Art

[0002] Cable is an indispensable supporting product widely used in the fields of electricity, communication, optical fiber, transportation, etc. It plays the role of transmitting electric energy, transmitting information and manufacturing various motors, electrical appliances and instruments, providing great convenience for people's life and production. The structure of the cable includes cable core, shielding layer and outer sheath layer from the inside to the outside. The outer sheath layer plays a vital role in protecting the cable because it is in direct contact with the outside world. Polyvinyl chloride has become one of the most widely used materials for making the outer sheath due to its good insulation performance, easy processing and excellent corrosion resistance. However, polyvinyl chloride material has insufficient mechanical properties, poor high temperature resistance and poor UV resistance. When used outdoors, the cable is easily affected by ultraviolet rays and aged, and is also easily damaged by the impact of flying sand and rocks. The thermal effect generated by the passage of current may also cause the cable surface to become soft and sticky, seriously affecting the service life of the cable. If the cable is near a factory or canteen, oil stains may accumulate, which is difficult to clean for a long time, resulting in excessive cable load and safety hazards.

[0003] Therefore, when using polyvinyl chloride materials as the outer sheath layer of cables, people usually modify them. For example, the patent with publication number CN104045938B discloses a heat-resistant PVC cable material. The patent uses polyvinyl chloride as the base material and silicone-coated silica as the filler to improve the heat resistance of the composite material. The cable prepared with the material can withstand high temperatures above 105°C, and the material has good processing performance and a simple and convenient process. However, the patent does not improve the anti-fouling and anti-ultraviolet properties. In actual use, it will accelerate aging due to ultraviolet radiation, affecting the service life of the cable. In addition, the accumulation of oil stains during long-term use may also make the cable overloaded, posing serious safety hazards. Summary of the invention

[0004] The purpose of the present invention is to provide a high-strength anti-aging cable and a preparation method thereof, which solves the following technical problems: (1) The cable has a short service life due to insufficient high temperature resistance and insufficient mechanical strength due to ultraviolet light irradiation; (2) When used for a long time, oil and dirt accumulate on the surface of the cable, increasing the load of the cable.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A high-strength anti-aging cable comprises, from the inside to the outside, a cable core, a shielding layer and an outer sheath layer; the cable core is formed by twisting a copper core covered with a polytetrafluoroethylene film; the shielding layer is formed by wrapping a metal aluminum foil around the surface of the cable core; the outer sheath layer comprises the following raw materials in parts by weight: 60-90 parts of polyvinyl chloride, 10-20 parts of anti-ultraviolet silicone rubber, 2-6 parts of heat stabilizer, 5-8 parts of filler, 2-5 parts of flame retardant, 1-3 parts of lubricant, 2-4 parts of dispersant, and 3-5 parts of high-temperature resistant cross-linking agent; the anti-ultraviolet silicone rubber is prepared by reacting methyl vinyl silicone rubber with 2-methyl-2-acrylic acid-2,2,6,6-tetramethyl-4-piperidyl ester; the high-temperature resistant cross-linking agent is prepared by reacting phenolic epoxy resin with perfluorobutyl ethyl alcohol and thioglycolic acid in sequence.

[0007] Furthermore, the heat stabilizer is any one of stearylbenzoylmethane and zinc stearate; the filler is any one of aluminum hydroxide, calcium carbonate, silicon dioxide, and magnesium hydroxide; the flame retardant is any one of triphenyl phosphate and diphenyl phosphate; the lubricant is any one of stearic acid and white oil; the dispersant is any one of ethylene diphosphate tetraethyl ester and hydroxypropyl methylcellulose.

[0008] Furthermore, the preparation method of the anti-ultraviolet silicone rubber is:

[0009] Place methyl vinyl silicone rubber in tetrahydrofuran, stir thoroughly for 8-10 hours, add 2-methyl-2-acrylic acid-2,2,6,6-tetramethyl-4-piperidinyl ester and initiator, heat to 60-70°C, react for 5-8 hours, add methanol for precipitation, filter, wash and dry to obtain UV-resistant silicone rubber.

[0010] Through the above technical scheme, under the action of an initiator, the alkenyl groups in the structure of methyl vinyl silicone rubber and the alkenyl groups in the structure of 2-methyl-2-acrylic acid-2,2,6,6-tetramethyl-4-piperidinyl ester undergo free radical polymerization reaction to obtain an anti-ultraviolet silicone rubber. The anti-ultraviolet silicone rubber structure contains a large number of silicon-oxygen bonds, which can enhance the high temperature resistance of the composite material. At the same time, the structure also contains hindered amine groups, which can enhance the anti-ultraviolet performance of the composite material. When the composite material is used as the outer sheath layer of a cable, the prepared cable can have excellent high temperature resistance and anti-ultraviolet aging performance, thereby enhancing the safety of the cable and extending the service life of the cable.

[0011] Furthermore, the initiator is any one of benzoyl peroxide, dicumyl peroxide, and tert-butyl benzoyl peroxide.

[0012] Furthermore, the preparation method of the high temperature resistant cross-linking agent comprises the following steps:

[0013] S1: placing bisphenol A novolac epoxy resin in anhydrous ethanol, adding perfluorobutyl ethyl alcohol and a catalyst, heating to 60-70°C, reacting for 3-5h, and removing the solvent by rotary evaporation to obtain a modified novolac epoxy resin;

[0014] S2: Place the modified phenolic epoxy resin in isopropanol, add thioglycolic acid and p-toluenesulfonic acid, and heat to react to obtain a high temperature resistant crosslinking agent.

[0015] Through the above technical scheme, under the action of a catalyst, the epoxy groups in the structure of bisphenol A novolac epoxy resin and the hydroxyl groups in the structure of perfluorobutyl ethyl alcohol undergo a ring-opening reaction to obtain a modified novolac epoxy resin, and then under the action of p-toluenesulfonic acid, the hydroxyl groups in the structure of the modified novolac epoxy resin undergo an esterification reaction with the carboxyl groups in the structure of thioglycolic acid to obtain a high-temperature resistant cross-linking agent; the high-temperature resistant cross-linking agent uses bisphenol A novolac epoxy resin as a matrix material of the cross-linking agent, has strong heat resistance, and also contains a large number of carbon-fluorine bonds in its structure, has large bond energy, low surface energy, and has strong hydrophobic self-cleaning ability, and also contains active thiol groups in its structure, which can undergo a cross-linking reaction with a polyvinyl chloride matrix in a molten state, so that the prepared composite material has excellent mechanical strength, high temperature resistance, and hydrophobic and anti-fouling properties. When applied to cables, it can ensure that the cables work normally in a high-temperature environment without softening and sticking, and can effectively reduce the accumulation of oil stains, broaden the use field of cables, and extend the service life of cables.

[0016] Furthermore, in step S1, the catalyst is any one of tetrabutylammonium bromide, tetrabutylammonium chloride, and tetrabutylammonium iodide.

[0017] Furthermore, in step S2, the temperature of the temperature-raising reaction is 55-65° C., and the time is 3-6 hours.

[0018] A method for preparing a high-strength anti-aging cable comprises the following steps:

[0019] ① Twisting 10-12 tinned copper wires with a diameter of 1-1.5 mm to obtain a copper core, coating the surface of the copper core with a polytetrafluoroethylene film with a thickness of 0.05-0.08 mm to form an insulating layer, and twisting the copper core with the insulating layer to form a cable core;

[0020] ② Wrap a metal aluminum foil with a thickness of 0.1-0.15mm around the surface of the cable core to form a shielding layer to obtain a primary cable;

[0021] ③ Place parts by weight of polyvinyl chloride, anti-ultraviolet silicone rubber, heat stabilizer, filler, flame retardant, lubricant, dispersant, and high temperature resistant crosslinking agent in a high-speed mixer, set the speed to 500-600r / min, heat to 170-190°C and mix for 2-3h, cool to room temperature and then discharge to obtain a mixture;

[0022] ④ Place the mixture in a twin-screw extruder, set the extrusion temperature to 175-185°C, the screw speed to 200-300r / min, melt extrude to obtain an outer sheath composite material, coat it on the primary cable surface, cool and solidify to form an outer sheath layer, and obtain a cable.

[0023] Beneficial effects of the present invention:

[0024] The present invention prepares anti-ultraviolet silicone rubber and a high-temperature resistant cross-linking agent, and participates in the preparation process of the cable outer sheath composite material, so that the prepared cable can have excellent mechanical strength, high-temperature resistance and excellent anti-ultraviolet effect, and can prevent the cable from being damaged, dripping and aging due to insufficient mechanical strength, poor high-temperature resistance and poor anti-ultraviolet effect when working outdoors for a long time, significantly extending the service life of the cable, and at the same time giving the cable hydrophobic self-cleaning ability, which can effectively reduce the accumulation of oil and dirt on the cable surface, reduce the cable load, broaden the use field of the cable, and bring significant economic benefits.

[0025] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0027] Figure 1 This is the infrared spectrum of the modified phenolic epoxy resin and the high temperature resistant crosslinking agent in Example 1 of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example 1

[0030] 1. Preparation of UV-resistant silicone rubber

[0031] Place 5 g of methyl vinyl silicone rubber in 100 ml of tetrahydrofuran, stir thoroughly for 8 h, then add 3 g of 2-methyl-2-acrylic acid-2,2,6,6-tetramethyl-4-piperidinyl ester and 0.5 g of benzoyl peroxide, heat to 60 ° C, react for 5 h, add 1.5 ml of methanol for precipitation, filter, wash and dry to obtain UV-resistant silicone rubber.

[0032] The nitrogen element analysis of methyl vinyl silicone rubber and UV-resistant silicone rubber was carried out using Vario MACRO CHNS-O element analyzer. The analysis showed that methyl vinyl silicone rubber does not contain nitrogen, and the nitrogen content in the structure of UV-resistant silicone rubber is 2.7%. The appearance of nitrogen indicates that a free radical polymerization reaction has occurred between methyl vinyl silicone rubber and 2-methyl-2-acrylic acid-2,2,6,6-tetramethyl-4-piperidinyl ester.

[0033] 2. Preparation of high temperature resistant cross-linking agent

[0034] S1: 3 ml of bisphenol A novolac epoxy resin was placed in 30 ml of anhydrous ethanol, 2 ml of perfluorobutyl ethyl alcohol and 0.2 g of tetrabutylammonium bromide were added, the temperature was raised to 60°C for reaction for 3 h, and the solvent was removed by rotary evaporation to obtain a modified novolac epoxy resin;

[0035] S2: Place 3 ml of modified phenolic epoxy resin in 50 ml of isopropanol, add 2 ml of thioglycolic acid and 0.3 g of p-toluenesulfonic acid, heat to 55° C., react for 3 h, and obtain a high temperature resistant crosslinking agent.

[0036] The modified phenolic epoxy resin and high temperature resistant crosslinking agent were characterized by infrared spectroscopy. Figure 1 It can be seen that in the infrared spectrum of the modified phenolic epoxy resin, 3243 cm -1 The absorption peak of hydroxyl is at 3023cm -1 The absorption peak of the carbon-hydrogen bond in the benzene ring is at 1721cm -1 The absorption peak of the ester group is 2523 cm -1 The absorption peak of the sulfur-hydrogen bond in the mercapto group is 3023 cm-1, which is compared with the infrared spectrum of the modified phenolic epoxy resin. -1 The absorption peak of hydroxyl group at 1721cm -1 The absorption peak of the carbon-oxygen double bond in the ester group appears at , indicating that the hydroxyl group in the modified phenolic epoxy resin structure and the carboxyl group in the thioglycolic acid structure undergo an esterification reaction.

[0037] 3. Preparation of outer sheath composite material

[0038] (1) 60 parts of polyvinyl chloride, 10 parts of anti-ultraviolet silicone rubber, 2 parts of stearyl benzoyl methane, 5 parts of aluminum hydroxide, 2 parts of triphenyl phosphate, 1 part of stearic acid, 2 parts of ethylene diphosphate tetraethyl, and 3 parts of a high-temperature resistant crosslinking agent are placed in a high-speed mixer, the speed is set to 500 r / min, the temperature is raised to 170° C. and mixed for 2 h, and the mixture is discharged after cooling to room temperature to obtain a mixed material;

[0039] (2) The mixed material is placed in a twin-screw extruder, the head temperature is set to 175° C., the screw speed is set to 200 r / min, and melt-extruded to obtain an outer sheath composite material.

[0040] Example 2

[0041] Preparation of outer sheath composite material

[0042] (1) 80 parts of polyvinyl chloride, 15 parts of anti-ultraviolet silicone rubber, 5 parts of zinc stearate, 7 parts of calcium carbonate, 3 parts of diphenyl phosphate, 2 parts of white oil, 3 parts of hydroxypropyl methylcellulose, and 4 parts of high temperature resistant crosslinking agent are placed in a high-speed mixer, the speed is set to 550 r / min, the temperature is raised to 180° C. and mixed for 2.5 hours, and the mixture is discharged after cooling to room temperature to obtain a mixture;

[0043] (2) The mixed material is placed in a twin-screw extruder, the head temperature is set to 180°C, the screw speed is set to 250 r / min, and melt-extruded to obtain an outer sheath composite material.

[0044] The preparation method of the UV-resistant silicone rubber and the high temperature resistant cross-linking agent is the same as that in Example 1.

[0045] Example 3

[0046] Preparation of outer sheath composite material

[0047] (1) 90 parts of polyvinyl chloride, 20 parts of anti-ultraviolet silicone rubber, 6 parts of zinc stearate, 8 parts of silicon dioxide, 5 parts of triphenyl phosphate, 3 parts of stearic acid, 4 parts of ethylene diphosphate tetraethyl, and 5 parts of a high-temperature resistant crosslinking agent are placed in a high-speed mixer, the speed is set to 600 r / min, the temperature is raised to 190° C. and mixed for 3 hours, and the mixture is discharged after cooling to room temperature to obtain a mixed material;

[0048] (2) The mixed material is placed in a twin-screw extruder, the head temperature is set to 185° C., the screw speed is set to 300 r / min, and melt-extruded to obtain an outer sheath composite material.

[0049] The preparation method of the UV-resistant silicone rubber and the high temperature resistant cross-linking agent is the same as that in Example 1.

[0050] Comparative Example 1

[0051] Preparation of outer sheath composite material:

[0052] (1) 80 parts of polyvinyl chloride, 5 parts of zinc stearate, 7 parts of calcium carbonate, 3 parts of diphenyl phosphate, 2 parts of white oil, 3 parts of hydroxypropyl methylcellulose, and 4 parts of a high-temperature resistant crosslinking agent are placed in a high-speed mixer, the speed is set to 550 r / min, the temperature is raised to 180° C. and mixed for 2.5 hours, and the mixture is discharged after cooling to room temperature to obtain a mixture;

[0053] (2) The mixed material is placed in a twin-screw extruder, the head temperature is set to 180°C, the screw speed is set to 250 r / min, and melt-extruded to obtain an outer sheath composite material.

[0054] Wherein, the preparation method of the high temperature resistant cross-linking agent is the same as that in Example 1.

[0055] Comparative Example 2

[0056] Preparation of outer sheath composite material

[0057] (1) 80 parts of polyvinyl chloride, 15 parts of anti-ultraviolet silicone rubber, 5 parts of zinc stearate, 7 parts of calcium carbonate, 3 parts of diphenyl phosphate, 2 parts of white oil, and 3 parts of hydroxypropyl methylcellulose are placed in a high-speed mixer, the speed is set to 550 r / min, the temperature is raised to 180° C. and mixed for 2.5 hours, and the mixture is discharged after cooling to room temperature to obtain a mixture;

[0058] (2) The mixed material is placed in a twin-screw extruder, the head temperature is set to 180°C, the screw speed is set to 250 r / min, and melt-extruded to obtain an outer sheath composite material.

[0059] The preparation method of the UV-resistant silicone rubber is the same as that in Example 1.

[0060] Comparative Example 3

[0061] Preparation of outer sheath composite material

[0062] (1) 80 parts of polyvinyl chloride, 5 parts of zinc stearate, 7 parts of calcium carbonate, 3 parts of diphenyl phosphate, 2 parts of white oil, and 3 parts of hydroxypropyl methylcellulose are placed in a high-speed mixer, the speed is set to 550 r / min, the temperature is raised to 180° C. and mixed for 2.5 hours, and the mixture is discharged after cooling to room temperature to obtain a mixture;

[0063] (2) The mixed material is placed in a twin-screw extruder, the head temperature is set to 180°C, the screw speed is set to 250 r / min, and melt-extruded to obtain an outer sheath composite material.

[0064] Comparative Example 4

[0065] Preparation of outer sheath composite material

[0066] (1) 80 parts of polyvinyl chloride, 15 parts of methyl vinyl silicone rubber, 5 parts of zinc stearate, 7 parts of calcium carbonate, 3 parts of diphenyl phosphate, 2 parts of white oil, 3 parts of hydroxypropyl methylcellulose, and 4 parts of a high-temperature resistant crosslinking agent are placed in a high-speed mixer, the speed is set to 550 r / min, the temperature is raised to 180° C. and mixed for 2.5 hours, and the mixture is discharged after cooling to room temperature to obtain a mixture;

[0067] (2) The mixed material is placed in a twin-screw extruder, the head temperature is set to 180°C, the screw speed is set to 250 r / min, and melt-extruded to obtain an outer sheath composite material.

[0068] Wherein, the preparation method of the high temperature resistant cross-linking agent is the same as that in Example 1.

[0069] Performance Testing

[0070] The outer sheath composite materials prepared in Examples 1 to 3 and Comparative Examples 1 to 4 were pressed into sheets to prepare samples that met the specifications. The samples were subjected to Vicat softening temperature test according to the reference standard GB / T1633-2000 to determine the high temperature resistance of the samples. The samples were subjected to temperature test according to the reference standard GB / T1040.3-2006 and placed at a wavelength of 313 nm and an irradiance of 0.72 / m 2 After being treated in the UV aging box for 2 days, the tensile strength test was carried out to determine the anti-UV aging performance and mechanical properties of the samples; the water contact angle test was carried out on the samples using the JC2000D2G contact angle tester to determine the anti-fouling and self-cleaning performance of the samples. The specific test results are shown in the table below:

[0071]

[0072]

[0073] It can be seen from the above table that the samples prepared from Examples 1 to 3 have excellent mechanical properties, as well as excellent high temperature resistance, UV resistance, and hydrophobic and antifouling effects. In comparison, the samples prepared from Comparative Examples 1 and 3 are poor in UV resistance, and the samples prepared from Comparative Examples 2 and 3 are poor in antifouling ability. The samples prepared from Comparative Examples 1 and 2 are good in high temperature resistance and mechanical properties, but not as good as the embodiments. The sample prepared from Comparative Example 3 is at a poor level in high temperature resistance and mechanics. The sample prepared from Comparative Example 4 directly adds methyl vinyl silicone rubber, has good high temperature resistance and mechanical properties but not as good as the embodiments, has good hydrophobic and antifouling ability, but poor UV resistance, because the methyl vinyl silicone rubber directly used does not introduce an anti-UV aging agent with a hindered amine group.

[0074] The outer sheath composite materials prepared in Examples 1 to 3 are used to prepare high-strength anti-aging cables respectively. The specific production method includes the following steps:

[0075] ①Twist 10 tinned copper wires with a diameter of 1 mm to obtain a copper core, cover the surface of the copper core with a polytetrafluoroethylene film with a thickness of 0.05 mm to form an insulating layer, and twist the copper core with the insulating layer to form a cable core;

[0076] ② Wrap a 0.1mm thick aluminum foil around the surface of the cable core to form a shielding layer to obtain a primary cable;

[0077] ③ The outer sheath composite material is melted and extruded and coated on the surface of the primary cable. After cooling and solidification, an outer sheath layer is formed to obtain a high-strength and aging-resistant cable.

[0078] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0079] The above contents are merely examples and explanations of the concept of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the scope defined by the concept of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A high-strength anti-aging cable, characterized in that: From the inside to the outside, it includes: a cable core, a shielding layer and an outer sheath layer; the cable core is formed by twisting a copper core covered with a polytetrafluoroethylene film; the shielding layer is formed by wrapping a metal aluminum foil around the surface of the cable core; the outer sheath layer includes the following raw materials by weight: 60-90 parts of polyvinyl chloride, 10-20 parts of anti-ultraviolet silicone rubber, 2-6 parts of heat stabilizer, 5-8 parts of filler, 2-5 parts of flame retardant, 1-3 parts of lubricant, 2-4 parts of dispersant, 3-5 parts of high temperature resistant crosslinking agent; the anti-ultraviolet silicone rubber is prepared by the reaction of methyl vinyl silicone rubber and 2-methyl-2-acrylic acid-2,2,6,6-tetramethyl-4-piperidyl ester; the high temperature resistant crosslinking agent is prepared by the reaction of phenolic epoxy resin with perfluorobutyl ethyl alcohol and thioglycolic acid in sequence; The preparation method of the anti-ultraviolet silicone rubber is: Place methyl vinyl silicone rubber in tetrahydrofuran, stir thoroughly for 8-10 hours, add 2-methyl-2-acrylic acid-2,2,6,6-tetramethyl-4-piperidinyl ester and initiator, heat to 60-70°C, react for 5-8 hours, add methanol for precipitation, filter, wash and dry to obtain UV-resistant silicone rubber; The preparation method of the high temperature resistant cross-linking agent comprises the following steps: S1: placing bisphenol A novolac epoxy resin in anhydrous ethanol, adding perfluorobutyl ethyl alcohol and a catalyst, heating to 60-70°C for reaction for 3-5h, and removing the solvent by rotary evaporation to obtain a modified novolac epoxy resin; S2: Place the modified phenolic epoxy resin in isopropanol, add thioglycolic acid and p-toluenesulfonic acid, and heat to react to obtain a high temperature resistant crosslinking agent.

2. A high-strength anti-aging cable according to claim 1, characterized in that: The heat stabilizer is any one of stearylbenzoylmethane and zinc stearate; the filler is any one of aluminum hydroxide, calcium carbonate, silicon dioxide, and magnesium hydroxide; the flame retardant is any one of triphenyl phosphate and diphenyl phosphate; the lubricant is any one of stearic acid and white oil; the dispersant is any one of ethylene diphosphate tetraethyl ester and hydroxypropyl methylcellulose.

3. A high-strength anti-aging cable according to claim 1, characterized in that: The initiator is any one of benzoyl peroxide, dicumyl peroxide and tert-butyl benzoyl peroxide.

4. The high-strength anti-aging cable according to claim 1, characterized in that: In step S1, the catalyst is any one of tetrabutylammonium bromide, tetrabutylammonium chloride and tetrabutylammonium iodide.

5. The high-strength anti-aging cable according to claim 1, characterized in that: In step S2, the temperature of the temperature-raising reaction is 55-65° C. and the time is 3-6 hours.

6. A method for preparing a high-strength anti-aging cable as claimed in claim 1, characterized in that: The preparation method is: ① Twisting 10-12 tinned copper wires with a diameter of 1-1.5 mm to obtain a copper core, coating the surface of the copper core with a polytetrafluoroethylene film with a thickness of 0.05-0.08 mm to form an insulating layer, and twisting the copper core with the insulating layer to form a cable core; ② Wrap a metal aluminum foil with a thickness of 0.1-0.15mm around the surface of the cable core to form a shielding layer to obtain a primary cable; ③ Place parts by weight of polyvinyl chloride, anti-ultraviolet silicone rubber, heat stabilizer, filler, flame retardant, lubricant, dispersant, and high temperature resistant crosslinking agent in a high-speed mixer, set the speed to 500-600r / min, heat to 170-190°C and mix for 2-3h, cool to room temperature and then discharge to obtain a mixture; ④ Place the mixture in a twin-screw extruder, set the extrusion temperature to 175-185°C, the screw speed to 200-300r / min, melt extrude to obtain an outer sheath composite material, coat it on the surface of the primary cable, cool and solidify to form an outer sheath layer, and obtain the cable.

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