Anti-aging sheath material for electronic wire and preparation method of anti-aging sheath material

Abstract

The invention relates to the field of sheath materials, and discloses an anti-aging sheath material for an electronic wire and a preparation method thereof, the sheath material comprises low density polyethylene, an ethylene-vinyl acetate copolymer, an ethylene-octene copolymer, ethylene propylene diene monomer, a triazine ring derivative, ammonium polyphosphate, modified nano silicon dioxide and an auxiliary agent; according to the triazine ring derivative, N-butyl-2, 2, 6, 6-tetramethyl-4-piperidylamine reacts with cyanuric chloride to prepare a triazine ring monosubstituent, hydrazine hydrochloride is used as a bridging agent to react with the triazine ring monosubstituent, and the triazine ring derivative and piperazine are polymerized to prepare the triazine ring derivative. The modified nano silicon dioxide is prepared by enabling 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl chloride and 4-propenyloxy-2-hydroxybenzophenone to react, and carrying out free radical polymerization on the reaction product on the surface of the nano silicon dioxide. The synergistic effect of mechanical property, thermo-oxidative aging resistance, ultraviolet aging resistance and flame retardant property is realized.

Description

Technical Field

[0001] This invention belongs to the field of sheath material technology, specifically relating to an aging-resistant sheath material for electronic wires and its preparation method. Background Technology

[0002] Electronic wires are indispensable connecting wires in electronic and electrical equipment. With the rapid development of industries such as home appliances and other electrical equipment, electronic information and automobiles, the electronic wire industry, as a supporting industry, has received great attention. Among them, polyolefins have outstanding electrical properties and processability, making them the preferred material for sheathing of electronic wires.

[0003] Polyolefins include various polymer matrices, such as polyethylene, polypropylene, polyolefin elastomers, and EPDM rubber. However, during the service life of polyolefins, they have a low oxygen index, making them easily ignited in air and releasing a large amount of heat and smoke when burning. Furthermore, during long-term use, polyolefins are exposed to ultraviolet light, heat, and oxygen, which causes aging, resulting in spots, silver lines, cracks, blooming, chalking, and changes in gloss on the product surface. This leads to an overall decline in the mechanical, electrical, and performance properties of polyolefin composites.

[0004] Therefore, it is often necessary to add flame retardants and antioxidants to improve the flame retardancy and aging resistance of polyolefin composites to meet market demands. Although halogenated flame retardants containing chlorine and bromine can effectively improve the flame retardancy of polyolefin composites, they produce a large amount of harmful smoke during combustion. In addition, traditionally used antioxidants have relatively small molecular weights and suffer from defects such as poor thermal stability, easy volatility, easy migration, and difficulty in dispersion during use, thus reducing the long-term application effect of antioxidants. Summary of the Invention

[0005] To address the shortcomings mentioned in the background art, the present invention aims to provide an aging-resistant sheath material for electronic wires and its preparation method. By adding triazine ring derivatives and modified nano-silica, a synergistic effect is achieved on mechanical properties, heat and oxygen aging resistance, UV aging resistance, and flame retardant properties.

[0006] The objective of this invention can be achieved through the following technical solutions: An aging-resistant sheath material for electronic wires comprises the following components in parts by weight: 50-70 parts low-density polyethylene, 5-15 parts ethylene-vinyl acetate copolymer, 5-10 parts ethylene-octene copolymer, 2-5 parts ethylene propylene diene monomer (EPDM) rubber, 3-7 parts triazine ring derivative, 4-10 parts ammonium polyphosphate, 4-8 parts modified nano-silica, 2.5-5 parts dicumyl peroxide, 2-5 parts triallyl isocyanurate, 1-2 parts plasticizer, and 0.1-0.3 parts lubricant; The triazine ring derivative was prepared by a nucleophilic substitution reaction between N-butyl-2,2,6,6-tetramethyl-4-piperidinamine and cyanuric chloride to obtain a triazine ring monosubstituted product. Then, hydrazine hydrochloride was used as a "bridging agent" to conduct a nucleophilic substitution reaction with the triazine ring monosubstituted product to obtain a triazine ring intermediate. Subsequently, the triazine ring intermediate was polymerized with piperazine to obtain the product. The modified nano-silica was prepared by reacting thionyl chloride with 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid to prepare 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl chloride, and then by acylation of 4-propenoxy-2-hydroxybenzophenone with 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl chloride to prepare a hindered phenol benzophenone derivative, which was then polymerized on the surface of nano-silica via free radical polymerization.

[0007] Preferably, the preparation method of the triazine ring derivative includes the following steps: A. Add xylene to the reactor, cool it to 0-5℃ in an ice bath, add cyanuric chloride, and slowly add a mixed solution of N-butyl-2,2,6,6-tetramethyl-4-piperidinamine and xylene dropwise while stirring. After the addition is complete, react for 2-3 hours. Then add sodium hydroxide solution dropwise. After the addition is complete, continue to react for 2-3 hours. After the reaction is complete, let it stand, separate the aqueous phase, wash it with sodium chloride solution, separate the aqueous phase, concentrate, cool, and filter. Wash the obtained product with frozen xylene and dry it to prepare the triazine ring monosubstituted product. B. Add xylene, hydrazine hydrochloride and triazine ring monosubstituted product to the reactor, heat to 50-65℃ with stirring, react for 2-3 hours, then add 20% sodium hydroxide solution dropwise. After the addition is complete, continue the reaction for 2-3 hours. After the reaction is complete, transfer the reaction solution to a separatory funnel, separate the aqueous layer, wash with hot sodium chloride solution, cool the obtained organic phase to room temperature, freeze overnight in a refrigerator, filter, and dry to prepare the triazine ring intermediate. C. Add the triazine ring intermediate, piperazine, xylene, and sodium hydroxide solution to a high-pressure reactor, seal the reactor, replace the air in the reactor with nitrogen three times, then purge with nitrogen to 0.6 MPa, heat and stir, and react at 170~180℃ for 3~4 hours. After the reaction is completed, cool down, release the gas, open the reactor, filter the reaction solution, wash the organic phase with sodium chloride solution, and then evaporate the solvent under reduced pressure to prepare the triazine ring derivative.

[0008] Preferably, in step A, the molar ratio of cyanuric chloride and N-butyl-2,2,6,6-tetramethyl-4-piperidinamine is 1:1 to 1.1.

[0009] Preferably, in step B, the molar ratio of the triazine monosubstituted product to hydrazine hydrochloride is 2:1.

[0010] Preferably, in step C, the molar ratio of the triazine ring intermediate to piperazine is 1:1 to 1.3.

[0011] Preferably, the method for preparing the modified nano-silica includes the following steps: ① Take 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid and dichloromethane in a reactor, stir to dissolve, and slowly add thionyl chloride dropwise under nitrogen protection. Then, stir the reaction at 45~55℃ for 4~6h. After the reaction is completed, distill under reduced pressure to prepare 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl chloride. ② Take 4-propenoxy-2-hydroxybenzophenone and tetrahydrofuran in a reactor, stir to dissolve, add triethylamine, purge with nitrogen, and heat in an ice-water bath until the system temperature reaches 0℃. Then add a mixed solution of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl chloride and tetrahydrofuran. After reacting for 1-2 hours, heat to room temperature and continue the reaction for 2-3 hours. After the reaction is completed, filter, wash, and separate by column chromatography to prepare the hindered phenol benzophenone derivative. ③ Place nano-silica and toluene in a reactor, and stir with nitrogen gas. After the mixture is evenly dispersed, add hindered phenol benzophenone derivative and azobisisobutyronitrile. Heat to 60-70℃ and react for 7-9 hours. After the reaction is completed, cool to room temperature, filter, wash and dry to prepare modified nano-silica.

[0012] Preferably, in step ③, the mass ratio of nano-silica to hindered phenol benzophenone derivative is 2~4:1.

[0013] Preferably, the plasticizer is one or a combination of several of dioctyl adipate, dimethyl phthalate, dioctyl phthalate, and diisodecyl phthalate.

[0014] Preferably, the lubricant is one or a combination of stearic acid, polyethylene wax, and oxidized polyethylene wax.

[0015] The preparation method of the aging-resistant sheath material for electronic wires as described above includes the following steps: weigh each component according to the weight parts, put low-density polyethylene, ethylene-vinyl acetate copolymer, ethylene-octene copolymer and EPDM rubber into a mixer and plasticize for 2-5 minutes, then add modified nano silica, triazine ring derivative, ammonium polyphosphate, lubricant and plasticizer, mix evenly and discharge at 100-110℃, filter the rubber and add dicumyl peroxide and triisocyanate, sheet out and cool to obtain the aging-resistant sheath material for electronic wires.

[0016] The beneficial effects of this invention are: This invention utilizes N-butyl-2,2,6,6-tetramethyl-4-piperidinamine to undergo a nucleophilic substitution reaction with cyanuric chloride to prepare a triazine ring monosubstituted product. Then, using hydrazine hydrochloride as a "bridging agent," it undergoes a nucleophilic substitution reaction with two molecules of the triazine ring monosubstituted product to prepare a triazine ring intermediate. Subsequently, the triazine ring intermediate is polymerized with piperazine to prepare a macromolecular triazine ring derivative. This triazine ring derivative, using cyanuric chloride as a raw material, introduces hindered amine photostable groups, anti-aging hydrazine groups, and piperazine onto the triazine ring and is used for the flame retardancy and aging resistance of sheath materials. This imparts excellent flame retardancy, UV aging resistance, and thermo-oxidative aging resistance to the sheath material, while preventing the migration and dispersion of functional components, thus exerting a long-lasting effect.

[0017] This invention utilizes thionyl chloride to chlorinate 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid to prepare 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl chloride. Then, acylation reaction is carried out between 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl chloride and 4-propenyloxy-2-hydroxybenzophenone to prepare a hindered phenol benzophenone derivative. Subsequently, the hindered phenol benzophenone derivative containing a double bond structure is polymerized by free radical to form microencapsulated modified nano-silica, thereby forming a polymer shell layer on the surface of nano-silica with hindered phenolic anti-thermal-oxidative aging and benzophenone-like UV absorption functions. This endows the sheath material with good UV aging resistance and thermo-oxidative aging resistance, while improving the compatibility and mechanical properties of nano-silica. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: A method for preparing a triazine ring derivative includes the following steps: A. Add 80 mL of xylene to the reactor, cool to 4 °C in an ice bath, add 10.0 g of cyanuric chloride, and slowly add a mixed solution of 11.5 g of N-butyl-2,2,6,6-tetramethyl-4-piperidinamine and 20 mL of xylene dropwise while stirring. After the addition is complete, react for 2 h. Then add 11 mL of 20% sodium hydroxide solution dropwise. After the addition is complete, continue to react for 2 h. After the reaction is complete, let stand, separate the aqueous phase, wash with 10% sodium chloride solution, separate the aqueous phase, concentrate, cool, and filter. Wash the obtained product with frozen xylene and dry to prepare the triazine ring monosubstituted product. B. Add 100 mL of xylene, 1.4 g of hydrazine hydrochloride and 14.5 g of triazine ring monosubstituted product to the reactor, heat to 60 °C with stirring, and react for 2 h. Then add 8 mL of 20% sodium hydroxide solution dropwise. After the addition is complete, continue the reaction for 3 h. After the reaction is complete, transfer the reaction solution to a separatory funnel, separate the aqueous layer, wash with hot 10% sodium chloride solution, cool the obtained organic phase to room temperature, freeze overnight in a refrigerator, filter, and dry to prepare the triazine ring intermediate. C. Add 14.3g of triazine ring intermediate, 1.9g of piperazine, 80mL of xylene and 4mL of 20% sodium hydroxide solution to a high-pressure reactor, seal the reactor, replace the air in the reactor with nitrogen three times, then purge with nitrogen to 0.6MPa, heat and stir, and react at 175℃ for 4h. After the reaction is completed, cool down, release the gas, open the reactor, filter the reaction solution, wash the organic phase with 10% sodium chloride solution, and then evaporate the solvent under reduced pressure to prepare the triazine ring derivative.

[0020] Example 2: A method for preparing modified nano-silica includes the following steps: ① Take 5.6 g of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid and 100 mL of dichloromethane in a reactor, stir to dissolve, and then slowly add 4 mL of thionyl chloride under nitrogen protection. Then, stir the reaction at 50 °C for 5 h. After the reaction is completed, distill under reduced pressure to prepare 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl chloride. ② Take 7.6 g of 4-propenoxy-2-hydroxybenzophenone and 100 mL of tetrahydrofuran in a reactor, stir to dissolve, add 3.3 g of triethylamine, purge with nitrogen, and heat in an ice-water bath until the system temperature reaches 0 °C. Then add 9.8 g of a mixed solution of 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl chloride and 20 mL of tetrahydrofuran. After reacting for 1 h, heat to room temperature and continue reacting for 2 h. After the reaction is completed, filter, wash, and separate by column chromatography to prepare the hindered phenol benzophenone derivative. ③ Take 5g of nano-silica and 80mL of toluene in a reactor, and stir with nitrogen gas. After the mixture is evenly dispersed, add 2g of hindered phenol benzophenone derivative and 0.04g of azobisisobutyronitrile. Heat to 65℃ and react for 8h. After the reaction is completed, cool to room temperature, filter, wash and dry to prepare modified nano-silica.

[0021] Example 3: An aging-resistant sheath material for electronic wires, comprising the following components by weight: 55 parts low-density polyethylene, 8 parts ethylene-vinyl acetate copolymer, 7 parts ethylene-octene copolymer, 2 parts ethylene propylene diene monomer (EPDM) rubber, 3.6 parts triazine ring derivative prepared in Example 1, 4.5 parts ammonium polyphosphate, 4.4 parts modified nano-silica prepared in Example 2, 2.5 parts dicumyl peroxide, 2.2 parts triallyl isocyanurate, 1.3 parts plasticizer dimethyl phthalate, and 0.1 parts lubricant oxidized polyethylene wax.

[0022] The preparation method of the above-mentioned aging-resistant sheath material for electronic wires includes the following steps: weigh each component according to the weight parts, put low-density polyethylene, ethylene-vinyl acetate copolymer, ethylene-octene copolymer and EPDM rubber into a mixer and plasticize for 4 minutes, then add modified nano silica, triazine ring derivative, ammonium polyphosphate, lubricant and plasticizer, mix evenly and discharge at 108°C, filter the rubber and add dicumyl peroxide and triisocyanate, sheet out and cool to prepare the aging-resistant sheath material for electronic wires.

[0023] Example 4: An aging-resistant sheath material for electronic wires, comprising the following components by weight: 60 parts low-density polyethylene, 10 parts ethylene-vinyl acetate copolymer, 8 parts ethylene-octene copolymer, 3 parts ethylene propylene diene monomer (EPDM) rubber, 6.1 parts triazine ring derivative prepared in Example 1, 7.2 parts ammonium polyphosphate, 6.8 parts modified nano-silica prepared in Example 2, 3.9 parts dicumyl peroxide, 3.6 parts triallyl isocyanurate, 1.6 parts plasticizer dimethyl phthalate, and 0.2 parts lubricant oxidized polyethylene wax.

[0024] The preparation method of the above-mentioned aging-resistant sheath material for electronic wires is the same as in Example 3.

[0025] Example 5: An aging-resistant sheath material for electronic wires, comprising the following components by weight: 68 parts low-density polyethylene, 13 parts ethylene-vinyl acetate copolymer, 9 parts ethylene-octene copolymer, 5 parts ethylene propylene diene monomer (EPDM) rubber, 6.7 parts triazine ring derivative prepared in Example 1, 9.3 parts ammonium polyphosphate, 7.8 parts modified nano-silica prepared in Example 2, 4.7 parts dicumyl peroxide, 4.6 parts triallyl isocyanurate, 1.8 parts plasticizer dimethyl phthalate, and 0.3 parts lubricant oxidized polyethylene wax.

[0026] The preparation method of the above-mentioned aging-resistant sheath material for electronic wires is the same as in Example 3.

[0027] Comparative Example 1: A method for preparing a triazine ring derivative includes the following steps: A. Add 80 mL of xylene to the reactor, cool to 4 °C in an ice bath, add 10.0 g of cyanuric chloride, and slowly add a mixed solution of 11.5 g of N-butyl-2,2,6,6-tetramethyl-4-piperidinamine and 20 mL of xylene dropwise while stirring. After the addition is complete, react for 2 h. Then add 11 mL of 20% sodium hydroxide solution dropwise. After the addition is complete, continue to react for 2 h. After the reaction is complete, let stand, separate the aqueous phase, wash with 10% sodium chloride solution, separate the aqueous phase, concentrate, cool, and filter. Wash the obtained product with frozen xylene and dry to prepare the triazine ring monosubstituted product. B. Add 100 mL of xylene, 1.7 g of piperazine and 14.5 g of triazine ring monosubstituted product to the reactor, heat to 60 °C with stirring, and react for 2 h. Then add 8 mL of 20% sodium hydroxide solution dropwise. After the addition is complete, continue the reaction for 3 h. After the reaction is complete, transfer the reaction solution to a separatory funnel, separate the aqueous layer, wash with hot 10% sodium chloride solution, cool the obtained organic phase to room temperature, freeze overnight in a refrigerator, filter, and dry to prepare the triazine ring intermediate. C. Add 14.3g of triazine ring intermediate, 1.9g of piperazine, 80mL of xylene and 4mL of 20% sodium hydroxide solution to a high-pressure reactor, seal the reactor, replace the air in the reactor with nitrogen three times, then purge with nitrogen to 0.6MPa, heat and stir, and react at 175℃ for 4h. After the reaction is completed, cool down, release the gas, open the reactor, filter the reaction solution, wash the organic phase with 10% sodium chloride solution, and then evaporate the solvent under reduced pressure to prepare the triazine ring derivative.

[0028] Comparative Example 2: An aging-resistant sheath material for electronic wires, comprising the following components by weight: 68 parts low-density polyethylene, 13 parts ethylene-vinyl acetate copolymer, 9 parts ethylene-octene copolymer, 5 parts ethylene propylene diene monomer (EPDM) rubber, 6.7 parts triazine ring derivative prepared in Comparative Example 1, 9.3 parts ammonium polyphosphate, 7.8 parts modified nano-silica prepared in Example 2, 4.7 parts dicumyl peroxide, 4.6 parts triallyl isocyanurate, 1.8 parts dimethyl phthalate plasticizer, and 0.3 parts oxidized polyethylene wax lubricant.

[0029] The preparation method of the above-mentioned aging-resistant sheath material for electronic wires is the same as in Example 3.

[0030] Comparative Example 3: An aging-resistant sheath material for electronic wires, comprising the following components by weight: 68 parts low-density polyethylene, 13 parts ethylene-vinyl acetate copolymer, 9 parts ethylene-octene copolymer, 5 parts ethylene propylene diene monomer (EPDM) rubber, 9.3 parts ammonium polyphosphate, 7.8 parts modified nano-silica prepared in Example 2, 4.7 parts dicumyl peroxide, 4.6 parts triallyl isocyanurate, 1.8 parts plasticizer dimethyl phthalate, and 0.3 parts lubricant oxidized polyethylene wax.

[0031] The preparation method of the above-mentioned aging-resistant sheath material for electronic wires is the same as in Example 3.

[0032] Comparative Example 4: An aging-resistant sheath material for electronic wires, comprising the following components by weight: 68 parts low-density polyethylene, 13 parts ethylene-vinyl acetate copolymer, 9 parts ethylene-octene copolymer, 5 parts ethylene propylene diene monomer (EPDM) rubber, 6.7 parts triazine ring derivative prepared in Example 1, 9.3 parts ammonium polyphosphate, 7.8 parts nano-silica, 4.7 parts dicumyl peroxide, 4.6 parts triallyl isocyanurate, 1.8 parts plasticizer dimethyl phthalate, and 0.3 parts lubricant oxidized polyethylene wax.

[0033] The preparation method of the above-mentioned aging-resistant sheath material for electronic wires is the same as in Example 3.

[0034] Performance testing The sheath materials prepared in Examples 3-5 and Comparative Examples 2-4 were subjected to performance testing: (1) Mechanical properties and aging resistance test: The tensile properties were tested using a universal testing machine according to GB / T 1040.2-2022. The sample size was 100mm×5mm×3.5mm. After aging at 110℃ for 48h, the change rate of tensile strength and elongation at break was tested to evaluate the heat and oxygen aging resistance of the sample. After irradiation at 60℃ for 72h with a 40W UV lamp (wavelength 290~400nm) (turning over for 36h in the middle to ensure uniform irradiation), the change rate of tensile strength and elongation at break was tested. The distance between the sample and the lamp tube was 254mm to evaluate the UV aging resistance of the sample. The data results are shown in Table 1.

[0035] (2) Flame retardant performance test: The sample was made into a test sample with a size of 130mm×6.5mm×3.2mm. The flame retardant performance was tested by limiting oxygen index. The data results are shown in Table 1.

[0036] Table 1 Sample performance test results As shown in Table 1, the sheath materials prepared in Examples 3-5 of this invention possess excellent mechanical properties, resistance to thermo-oxidative aging, resistance to ultraviolet aging, and flame retardant properties. In Comparative Example 2, the triazine ring derivative was added, replacing hydrazine hydrochloride with an equimolar amount of piperazine. Comparative Example 3 did not contain a triazine ring derivative. The measured changes in tensile strength and elongation at break after thermo-oxidative aging in Comparative Examples 2-3 were significantly different from those in Examples 3-5. This is because the hydrazine group captures and removes free radicals generated during the aging and degradation of the sheath material, effectively improving its resistance to thermo-oxidative aging. Furthermore, the measured changes in tensile strength and elongation at break after ultraviolet aging in Comparative Example 3 were significantly different from those in Examples 3-5, indicating a significant improvement in the ultimate resistance. The oxygen index was significantly lower than that of Examples 3-5, indicating that the introduction of the triazine ring derivative greatly improved the aging resistance and flame retardant properties. In Comparative Example 4, no modification treatment was performed on the nano-silica, and its measured mechanical properties, resistance to thermo-oxidative aging, and resistance to ultraviolet aging were lower than those of Examples 3-5. This is because the compatibility between the nanoparticles and the matrix material deteriorated, resulting in a decrease in mechanical properties. At the same time, the lack of a polymer shell layer with hindered phenolic resistance to thermo-oxidative aging and benzophenone-based ultraviolet absorption function on the surface of the nano-silica also led to a decrease in aging resistance.

[0037] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An aging-resistant sheath material for electronic wires, characterized in that, It comprises the following components by weight: 50-70 parts low-density polyethylene, 5-15 parts ethylene-vinyl acetate copolymer, 5-10 parts ethylene-octene copolymer, 2-5 parts ethylene propylene diene monomer (EPDM) rubber, 3-7 parts triazine ring derivative, 4-10 parts ammonium polyphosphate, 4-8 parts modified nano silica, 2.5-5 parts dicumyl peroxide, 2-5 parts triallyl isocyanurate, 1-2 parts plasticizer, and 0.1-0.3 parts lubricant; The triazine ring derivative was prepared by a nucleophilic substitution reaction between N-butyl-2,2,6,6-tetramethyl-4-piperidinamine and cyanuric chloride to obtain a triazine ring monosubstituted product. Then, hydrazine hydrochloride was used as a "bridging agent" to conduct a nucleophilic substitution reaction with the triazine ring monosubstituted product to obtain a triazine ring intermediate. Subsequently, the triazine ring intermediate was polymerized with piperazine. The modified nano-silica was prepared by reacting thionyl chloride with 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid to prepare 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl chloride, and then by acylation of 4-propenoxy-2-hydroxybenzophenone with 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl chloride to prepare a hindered phenol benzophenone derivative, which was then polymerized on the surface of nano-silica via free radical polymerization.

2. The aging-resistant sheath material for electronic wires according to claim 1, characterized in that, The molar ratio of cyanuric chloride and N-butyl-2,2,6,6-tetramethyl-4-piperidinamine is 1:1 to 1.

1.

3. The aging-resistant sheath material for electronic wires according to claim 1, characterized in that, The molar ratio of the triazine ring monosubstituted product to hydrazine hydrochloride is 2:

1.

4. The aging-resistant sheath material for electronic wires according to claim 1, characterized in that, The molar ratio of the triazine ring intermediate to piperazine is 1:1 to 1.

3.

5. The aging-resistant sheath material for electronic wires according to claim 1, characterized in that, The mass ratio of the nano-silica to the hindered phenol benzophenone derivative is 2~4:

1.

6. The aging-resistant sheath material for electronic wires according to claim 1, characterized in that, The plasticizer is one or a combination of several of the following: dioctyl adipate, dimethyl phthalate, dioctyl phthalate, and diisodecyl phthalate.

7. The aging-resistant sheath material for electronic wires according to claim 1, characterized in that, The lubricant is one or a combination of stearic acid, polyethylene wax, and oxidized polyethylene wax.

8. A method for preparing an aging-resistant sheath material for electronic wires according to any one of claims 1 to 7, characterized in that, Includes the following steps: Weigh each component according to the weight parts, put low-density polyethylene, ethylene-vinyl acetate copolymer, ethylene-octene copolymer and EPDM rubber into a mixer and plasticize for 2-5 minutes. Then add modified nano silica, triazine ring derivative, ammonium polyphosphate, lubricant and plasticizer. After mixing evenly, discharge the material at 100-110℃. After filtering the rubber, add dicumyl peroxide and triisocyanate. After sheeting and cooling, the aging-resistant sheath material for electronic wires is prepared.

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