A high temperature resistant rubber cable
Patent Information
- Application Number
- CN202610733750.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-26
- Publication Date
- 2026-08-18
AI Technical Summary
然而，这些体系在实际使用中仍存在明显不足：一方面，未经表面修饰的无机填料在硅橡胶基体中分散性差，易团聚，导致护套的力学性能（尤其是拉伸强度和断裂伸长率）难以兼顾；另一方面，常规偶联剂（如乙烯基三甲氧基硅烷）改性效果有限，填料与基体之间缺乏牢固的化学键合，长期高温老化后界面脱粘，性能衰减严重
本发明通过设计一种含双三乙氧基硅烷、席夫碱、乙烯基及苯基膦酰胺结构的多功能改性剂，对CeO2进行表面化学接枝，改性剂中的硅烷端基在酸性混合溶剂中原位水解缩合，与CeO2表面羟基形成稳定的Ce-O-Si共价键，使CeO2颗粒被有机包覆层有效隔离，显著降低了纳米粒子的表面能并抑制其团聚，从而大幅提升改性CeO2在甲基乙烯基硅橡胶/线性低密度聚乙烯复合基体中的分散均匀性和界面相容性；包覆层上保留的乙烯基可在护套层过氧化物交联过程中参与硅橡胶的硫化反应，将CeO2以化学键方式锚固在三维交联网络内，增强无机-有机界面结合强度并优化整体交联密度，在显著提高护套层拉伸强度的同时有效缓解了刚性填料带来的延展性损失，实现增强与增韧的统一；此外，改性层中的席夫碱基团和苯基膦酰胺单元兼具自由基捕获与热稳定功能，与CeO2自身Ce3+/Ce4+可逆氧化还原循环产生协同效应，能够持续淬灭热氧老化及高温降解过程中的活性自由基，抑制聚合物链断裂，提高材料的初始分解温度和高温残炭率，而磷-氮结构通过凝聚相阻燃机制促进成炭，进一步赋予护套层优异的耐热稳定性和阻燃性能，使电缆护套在高温工况下长期保持高强、高柔韧及可靠的防护能力。
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Abstract
Description
Technical Field
[0001] This invention belongs to the field of cable technology, specifically, it relates to a high-temperature resistant rubber cable. Background Technology
[0002] High-temperature resistant rubber cables are widely used in power transmission and electrical equipment connection in high-temperature environments. Existing high-temperature resistant rubber cables typically consist of a conductor, an insulation layer, and a sheath layer from the inside out. The sheath layer, as the outermost layer that directly withstands heat, oxygen, mechanical stress, and flame attack, directly affects the cable's service life and safety.
[0003] Currently, most commercially available cable sheaths use silicone rubber or modified silicone rubber as the matrix, and improve heat resistance and flame retardancy by adding inorganic fillers (such as cerium dioxide, magnesium hydroxide, etc.) and additives such as flame retardants and antioxidants. However, these systems still have significant shortcomings in practical use: on the one hand, unmodified inorganic fillers have poor dispersion in the silicone rubber matrix and are prone to agglomeration, making it difficult to achieve the desired mechanical properties of the sheath (especially tensile strength and elongation at break); on the other hand, conventional coupling agents (such as vinyltrimethoxysilane) have limited modification effects, and there is a lack of strong chemical bonding between the filler and the matrix, resulting in interface debonding and severe performance degradation after long-term high-temperature aging. In addition, the flame retardant and anti-aging functions in existing technologies mostly rely on the addition of small-molecule additives. These additives have poor compatibility with the matrix and are prone to migration and precipitation at high temperatures, which not only reduces the flame retardant efficiency but also deteriorates the flexibility and processing stability of the material. More importantly, existing technologies lack filler modification strategies that can integrate multiple functions such as high dispersion, strong interfacial bonding, reactive crosslinking, free radical capture, and condensed phase flame retardancy. This makes it difficult for cable sheaths to achieve simultaneous improvements in high strength, high flame retardancy, and excellent thermal stability while maintaining good flexibility.
[0004] Therefore, developing a high-temperature resistant rubber cable with superior overall performance that can operate reliably for a long time under high-temperature conditions has significant engineering value and market significance. Summary of the Invention
[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-temperature resistant rubber cable.
[0006] The objective of this invention can be achieved through the following technical solutions: A high-temperature resistant rubber cable is characterized in that it comprises, from the inside out, a conductor, an insulation layer, and a sheath layer; wherein the raw material of the sheath layer comprises the following components: by weight, 80-100 parts methyl vinyl silicone rubber, 10-12 parts linear low-density polyethylene, 4-5 parts crosslinking agent, 10-12 parts modified CeO2, 1-2 parts antioxidant, and 1-2 parts lubricant.
[0007] A more optimized preparation process for the modified CeO2 is as follows: CeO2 particles are added to a mixed solvent of anhydrous ethanol and deionized water, ultrasonically dispersed until uniform, and the pH is adjusted to 4-5 with acetic acid to obtain dispersion A; the modifier is added to anhydrous tetrahydrofuran and stirred until uniform to obtain solution B; solution B is slowly added to dispersion A under stirring, the temperature is raised to 60℃ and reacted for 4-8 hours. After the reaction is completed, the solid is separated by centrifugation, washed with anhydrous ethanol, and vacuum dried to obtain modified CeO2.
[0008] In a more optimized manner, the raw materials for preparing the modified CeO2 include the following components: by weight, 10-12 parts of CeO2 particles, 180-200 parts of anhydrous ethanol, 20-30 parts of deionized water, 2-5 parts of modifier, and 10-20 parts of anhydrous tetrahydrofuran.
[0009] In a more optimized manner, the preparation process of the modifier is as follows: S1: Mix 3-allyl-2-hydroxybenzaldehyde, anhydrous ethanol, and hydrochloric acid, stir until homogeneous, and then slowly add ethylenediamine dropwise while maintaining vigorous stirring throughout the process. After the addition is complete, gradually raise the temperature to 60°C and react for 3-4 hours. After the reaction is complete, cool to room temperature, filter, wash, and dry to obtain intermediate A. S2: Mix intermediate A, anhydrous tetrahydrofuran and triethylamine, stir well, and slowly add phenylphosphonic dichloropterone chloride dropwise under ice-water bath cooling. After the addition is complete, allow it to rise naturally to room temperature and continue stirring for 2-6 hours. After the reaction is complete, filter the reaction solution under reduced pressure to remove triethylamine hydrochloride, remove the solvent from the filtrate by rotary evaporation, extract with ethyl acetate / water (50:50), and dry the organic phase under vacuum to obtain intermediate B. S3: Intermediate B is mixed with anhydrous tetrahydrofuran and triethylamine. 3-Aminopropyltriethoxysilane is added under nitrogen protection, and the mixture is stirred and heated to 50°C. The reaction is carried out for 3-6 hours. After the reaction is completed, the mixture is filtered, and the filtrate is concentrated under reduced pressure. The residue is precipitated with anhydrous n-hexane and dried under vacuum to obtain the modifier.
[0010] In the scheme, firstly, under acid catalysis, the aldehyde group of 3-allyl-2-hydroxybenzaldehyde undergoes a condensation reaction with the primary amino groups at both ends of ethylenediamine to form intermediate A containing a Schiff base bridging structure, while retaining the phenolic hydroxyl group and vinyl group; then, the phenolic hydroxyl group of intermediate A undergoes a nucleophilic substitution reaction with one chlorine atom of phenylphosphonic dichloride and removes hydrogen chloride, thereby attaching a phosphorus-containing structural unit to intermediate A, resulting in intermediate B that still retains another active chlorine atom; finally, the active chlorine atom retained in intermediate B undergoes a further nucleophilic substitution reaction with the primary amino group of 3-aminopropyltriethoxysilane and removes hydrogen chloride, thereby introducing a hydrolyzable condensable triethoxysilane group into the molecular structure by chemical bond, thus obtaining the modifier.
[0011] The structure of the modifier is shown below: In a more optimized manner, the raw materials for preparing intermediate A include the following components: by weight, 25-35 parts of 3-allyl-2-hydroxybenzaldehyde, 150-180 parts of anhydrous ethanol, 2-5 parts of hydrochloric acid, and 5-8 parts of ethylenediamine.
[0012] In a more optimized manner, the raw materials for preparing intermediate B include the following components: by weight, 15-18 parts of intermediate A, 200-250 parts of anhydrous tetrahydrofuran, 8-10 parts of triethylamine, and 18-20 parts of phenylphosphonic dichloride.
[0013] In a more optimized manner, the raw materials for preparing the modifier include the following components: by weight, 15-25 parts intermediate B, 150-180 parts anhydrous tetrahydrofuran, 5-10 parts triethylamine, and 15-25 parts 3-aminopropyltriethoxysilane.
[0014] More preferably, the antioxidant is antioxidant 1010 and antioxidant 168 in a mass ratio of 1:2.
[0015] More preferably, the lubricant is one or more of calcium stearate, silicone masterbatch, and polyethylene wax.
[0016] The beneficial effects of this invention are: This invention designs a multifunctional modifier containing bis(triethoxysilane), Schiff base, vinyl group, and phenylphosphine amide structure to chemically graft CeO2 onto its surface. The silane end groups in the modifier undergo in-situ hydrolysis and condensation in an acidic mixed solvent, forming stable Ce-O-Si covalent bonds with the hydroxyl groups on the CeO2 surface. This effectively isolates the CeO2 particles by an organic coating layer, significantly reducing the surface energy of the nanoparticles and inhibiting their aggregation. This, in turn, greatly improves the performance of modified CeO2 in a methyl vinyl silicone rubber / linear low-density polyethylene composite matrix. The coating layer enhances uniformity and interfacial compatibility; the vinyl groups retained on the coating layer can participate in the vulcanization reaction of silicone rubber during the peroxide crosslinking process of the sheath layer, anchoring CeO2 within the three-dimensional crosslinked network through chemical bonds, thereby strengthening the inorganic-organic interfacial bonding strength and optimizing the overall crosslinking density. This significantly improves the tensile strength of the sheath layer while effectively mitigating the loss of ductility caused by rigid fillers, achieving a balance between reinforcement and toughening. Furthermore, the Schiff base groups and phenylphosphine amide units in the modified layer possess both free radical scavenging and thermal stabilizing functions, which, combined with CeO2 itself, enhance the uniformity and interfacial compatibility. 3+ / Ce 4+The reversible redox cycle produces a synergistic effect, which can continuously quench active free radicals in the process of thermo-oxidative aging and high-temperature degradation, inhibit polymer chain breakage, and improve the initial decomposition temperature and high-temperature char rate of the material. Meanwhile, the phosphorus-nitrogen structure promotes char formation through the condensed phase flame retardant mechanism, further endowing the sheath layer with excellent heat resistance and flame retardant properties, enabling the cable sheath to maintain high strength, high flexibility and reliable protection capabilities for a long time under high-temperature conditions. Detailed Implementation
[0017] 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.
[0018] Example 1: A high-temperature resistant rubber cable is made by twisting copper-tin alloy wires together to form a conductor core. After being placed in parallel, styrene-butadiene rubber is extruded over the core to form an insulation layer. Subsequently, 80 parts of methyl vinyl silicone rubber, 10 parts of linear low-density polyethylene, 4 parts of crosslinking agent (dicumyl peroxide), 10 parts of modified CeO2, 1 part of antioxidant (antioxidant 1010 and antioxidant 168 in a mass ratio of 1:2) and 1 part of lubricant (calcium stearate) are mixed (at 120°C and 30 r / min for 20 min), pressed into sheets on an open mill, and granulated in a granulator. The mixture is then extruded over the insulation layer and crosslinked (at 150°C and 0.5 MPa for 40 min) to form the final sheath layer. The preparation process of modified CeO2 is as follows: 10 parts of CeO2 particles are added to a mixed solvent of 180 parts of anhydrous ethanol and 20 parts of deionized water, and ultrasonically dispersed evenly. The pH is adjusted to 4 with acetic acid to obtain dispersion A. 2 parts of modifier are added to 10 parts of anhydrous tetrahydrofuran and stirred evenly to obtain solution B. Solution B is slowly added to dispersion A under stirring, and the temperature is raised to 60℃ for 4 hours. After the reaction is completed, the solid is separated by centrifugation, washed with anhydrous ethanol, and vacuum dried to obtain modified CeO2. The preparation process of the modifier is as follows: S1: Mix 25 parts of 3-allyl-2-hydroxybenzaldehyde, 150 parts of anhydrous ethanol, and 2 parts of hydrochloric acid (37wt%), stir until homogeneous, and then slowly add 5 parts of ethylenediamine dropwise while maintaining vigorous stirring throughout the process. After the addition is complete, gradually raise the temperature to 60°C and react for 3 hours. After the reaction is complete, cool to room temperature, filter, wash, and dry to obtain intermediate A. S2: Mix 15 parts of intermediate A, 200 parts of anhydrous tetrahydrofuran and 8 parts of triethylamine, stir well, and slowly add 18 parts of phenylphosphonic dichloride dropwise under ice-water bath cooling. After the addition is complete, allow it to rise naturally to room temperature and continue stirring for 2 hours. After the reaction is complete, filter the reaction solution under reduced pressure to remove triethylamine hydrochloride, remove the solvent by rotary evaporation of the filtrate, extract with ethyl acetate / water (50:50), and dry the organic phase under vacuum to obtain intermediate B. S3: Mix 15 parts of intermediate B with 150 parts of anhydrous tetrahydrofuran and 5 parts of triethylamine, add 15 parts of 3-aminopropyltriethoxysilane under nitrogen protection, stir and heat to 50°C, react for 3 hours. After the reaction is complete, filter, concentrate the filtrate under reduced pressure, precipitate the residue with anhydrous n-hexane, and dry under vacuum to obtain the modifier.
[0019] Example 2: A high-temperature resistant rubber cable is made by twisting copper-tin alloy wires together to form a conductor core. After being placed in parallel, styrene-butadiene rubber is extruded over the core to form an insulation layer. Subsequently, 100 parts of methyl vinyl silicone rubber, 12 parts of linear low-density polyethylene, 5 parts of crosslinking agent (dicumyl peroxide), 12 parts of modified CeO2, 2 parts of antioxidant (antioxidant 1010 and antioxidant 168 in a mass ratio of 1:2) and 2 parts of lubricant (calcium stearate) are mixed (at 120°C and 30 r / min for 20 min), pressed into sheets on an open mill, and granulated in a granulator. The mixture is then extruded over the insulation layer and crosslinked (at 150°C and 0.5 MPa for 40 min) to form the final sheath layer. The preparation process of modified CeO2 is as follows: 12 parts of CeO2 particles are added to a mixed solvent of 200 parts of anhydrous ethanol and 30 parts of deionized water, and ultrasonically dispersed evenly. The pH is adjusted to 5 with acetic acid to obtain dispersion A. 5 parts of modifier are added to 20 parts of anhydrous tetrahydrofuran and stirred evenly to obtain solution B. Solution B is slowly added to dispersion A under stirring, and the temperature is raised to 60℃ for 8 hours. After the reaction is completed, the solid is separated by centrifugation, washed with anhydrous ethanol, and vacuum dried to obtain modified CeO2. The preparation process of the modifier is as follows: S1: Mix 35 parts of 3-allyl-2-hydroxybenzaldehyde, 180 parts of anhydrous ethanol, and 5 parts of hydrochloric acid (37wt%), stir until homogeneous, and then slowly add 8 parts of ethylenediamine dropwise while maintaining vigorous stirring throughout the process. After the addition is complete, gradually raise the temperature to 60℃ and react for 4 hours. After the reaction is complete, cool to room temperature, filter, wash, and dry to obtain intermediate A. S2: Mix 18 parts of intermediate A, 250 parts of anhydrous tetrahydrofuran and 10 parts of triethylamine, stir well, and slowly add 20 parts of phenylphosphonic dichloride dropwise under ice-water bath cooling. After the addition is complete, allow it to rise naturally to room temperature and continue stirring for 6 hours. After the reaction is complete, filter the reaction solution under reduced pressure to remove triethylamine hydrochloride, remove the solvent from the filtrate by rotary evaporation, extract with ethyl acetate / water (50:50), and dry the organic phase under vacuum to obtain intermediate B. S3: Mix 25 parts of intermediate B with 180 parts of anhydrous tetrahydrofuran and 10 parts of triethylamine, add 25 parts of 3-aminopropyltriethoxysilane under nitrogen protection, stir and heat to 50°C, react for 6 hours. After the reaction is completed, filter, concentrate the filtrate under reduced pressure, precipitate the residue with anhydrous n-hexane, and dry under vacuum to obtain the modifier.
[0020] Example 3: A high-temperature resistant rubber cable, wherein copper-tin alloy wires are twisted together to form a conductor to obtain a core, which is then placed in parallel and extruded with styrene-butadiene rubber to form an insulation layer; subsequently, 90 parts of methyl vinyl silicone rubber, 11 parts of linear low-density polyethylene, 4.5 parts of crosslinking agent (dicumyl peroxide), 11 parts of modified CeO2, 1.5 parts of antioxidant (antioxidant 1010 and antioxidant 168 in a mass ratio of 1:2) and 1.5 parts of lubricant (calcium stearate) are mixed (at 120°C and 30 r / min for 20 min), pressed into sheets on an open mill, granulated in a granulator, and then extruded onto the outside of the insulation layer, followed by crosslinking treatment (at 150°C and 0.5 MPa for 40 min) to form the final sheath layer; The preparation process of modified CeO2 is as follows: 11 parts of CeO2 particles are added to a mixed solvent of 190 parts of anhydrous ethanol and 25 parts of deionized water, and ultrasonically dispersed evenly. The pH is adjusted to 4.5 with acetic acid to obtain dispersion A. 3.5 parts of modifier are added to 15 parts of anhydrous tetrahydrofuran and stirred evenly to obtain solution B. Solution B is slowly added to dispersion A under stirring, and the temperature is raised to 60℃ for 6 hours. After the reaction is completed, the solid is separated by centrifugation, washed with anhydrous ethanol, and vacuum dried to obtain modified CeO2. The preparation process of the modifier is as follows: S1: Mix 30 parts of 3-allyl-2-hydroxybenzaldehyde, 165 parts of anhydrous ethanol, and 3.5 parts of hydrochloric acid (37wt%) and stir until homogeneous. Then slowly add 6.5 parts of ethylenediamine dropwise while maintaining vigorous stirring throughout the process. After the addition is complete, gradually raise the temperature to 60°C and react for 3.5 hours. After the reaction is complete, cool to room temperature, filter, wash, and dry to obtain intermediate A. S2: Mix 16.5 parts of intermediate A, 225 parts of anhydrous tetrahydrofuran and 9 parts of triethylamine, stir well, and slowly add 19 parts of phenylphosphonic dichloride dropwise under ice-water bath cooling. After the addition is complete, allow it to rise naturally to room temperature and continue stirring for 4 hours. After the reaction is complete, filter the reaction solution under reduced pressure to remove triethylamine hydrochloride, remove the solvent by rotary evaporation of the filtrate, extract with ethyl acetate / water (50:50), and dry the organic phase under vacuum to obtain intermediate B. S3: Mix 20 parts of intermediate B with 165 parts of anhydrous tetrahydrofuran and 7.5 parts of triethylamine, add 20 parts of 3-aminopropyltriethoxysilane under nitrogen protection, stir and heat to 50°C, react for 4.5 h. After the reaction is complete, filter, concentrate the filtrate under reduced pressure, precipitate the residue with anhydrous n-hexane, and dry under vacuum to obtain the modifier.
[0021] Comparative Example 1: No modification was made to the CeO2 particles, as follows: A high-temperature resistant rubber cable is made by twisting copper-tin alloy wires together to form a conductor core. After being placed in parallel, styrene-butadiene rubber is extruded over the core to form an insulation layer. Subsequently, 90 parts of methyl vinyl silicone rubber, 11 parts of linear low-density polyethylene, 4.5 parts of crosslinking agent (dicumyl peroxide), 1.5 parts of antioxidant (antioxidant 1010 and antioxidant 168 in a mass ratio of 1:2) and 1.5 parts of lubricant (calcium stearate) are mixed (at 120°C and 30 r / min for 20 min), pressed into sheets on an open mill, and granulated in a granulator. The mixture is then extruded over the insulation layer and crosslinked (at 150°C and 0.5 MPa for 40 min) to form the final sheath layer.
[0022] Comparative Example 2: CeO2 particles were modified using vinyltrimethoxysilane, as detailed below: A high-temperature resistant rubber cable is made by twisting copper-tin alloy wires together to form a conductor core. After being placed in parallel, styrene-butadiene rubber is extruded over the core to form an insulation layer. Subsequently, 90 parts of methyl vinyl silicone rubber, 11 parts of linear low-density polyethylene, 4.5 parts of crosslinking agent (dicumyl peroxide), 11 parts of modified CeO2, 1.5 parts of antioxidant (antioxidant 1010 and antioxidant 168 in a mass ratio of 1:2) and 1.5 parts of lubricant (calcium stearate) are mixed (at 120°C and 30 r / min for 20 min), pressed into sheets on an open mill, and granulated in a granulator. The mixture is then extruded over the insulation layer and crosslinked (at 150°C and 0.5 MPa for 40 min) to form the final sheath layer. The preparation process of modified CeO2 is as follows: 3.5 parts of vinyltrimethoxysilane are added to deionized water, glacial acetic acid is added to adjust the pH to 4.5, and the mixture is stirred at room temperature for 3 hours. Then CeO2 particles are added, and the mixture is stirred for another 4 hours. After the reaction is completed, the mixture is centrifuged, the solid is washed with anhydrous ethanol, and dried under vacuum to obtain modified CeO2.
[0023] Testing experiment: (1) The tensile strength and elongation at break of the cable sheath of the examples and comparative examples were tested in accordance with standard GB / T 1040.1-2025; (2) The oxygen index of the cable sheaths of the examples and comparative examples was determined by high temperature test according to standard GB / T 2406.3-2022; (3) The thermal properties of the sheath material were tested using a thermogravimetric analyzer. In the nitrogen range, the temperature was increased from room temperature to 800°C at a rate of 10°C / min. The test results are shown in the table below: Conclusion: Experimental results show that the high-temperature resistant rubber cable sheath layer prepared by this invention is significantly superior to the comparative example in terms of tensile strength, flame retardancy, and thermal stability. Example 3 exhibits the best overall performance, with a tensile strength of 11.8 MPa, an oxygen index of 33.1%, an initial decomposition temperature as high as 448.5℃, and a residual carbon content of 33.1%. Compared to Comparative Example 1 (tensile strength only 6.5 MPa, oxygen index 25.6%, initial decomposition temperature 375.3℃, and residual carbon content 13.5%) without modified CeO2, all properties are significantly improved. Furthermore, the elongation at break of this example remains between 316.5% and 340.5%, lower than Comparative Example 1's 382.5%, but still possesses good flexibility and is superior to Comparative Example 2 (elongation at break 310.7%, tensile strength 9.3%), which uses conventional vinyltrimethoxysilane to modify CeO2. Therefore, the multifunctional modifier containing bis(triethoxysilane), Schiff base and phenylphosphine amide structure designed in this invention can effectively improve the dispersion and interfacial bonding of CeO2 in silicone rubber / polyethylene composite matrix. By participating in crosslinking reaction and synergistic thermo-oxidative stabilization mechanism, it can significantly enhance the mechanical strength, flame retardant properties and high-temperature aging resistance of cable sheath while maintaining high ductility, providing an excellent technical solution for the long-term reliable operation of cables under high-temperature conditions.
[0024] In the description of this specification, the 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 present invention. In this specification, the 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.
[0025] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.
Claims
1. A high-temperature resistant rubber cable, characterized in that, From the inside out, it includes a wire core, an insulation layer, and a sheath layer; the raw materials of the sheath layer include the following components: by weight, 80-100 parts methyl vinyl silicone rubber, 10-12 parts linear low-density polyethylene, 4-5 parts crosslinking agent, 10-12 parts modified CeO2, 1-2 parts antioxidant, and 1-2 parts lubricant.
2. The high-temperature resistant rubber cable according to claim 1, characterized in that, The preparation process of the modified CeO2 is as follows: CeO2 particles are added to a mixed solvent of anhydrous ethanol and deionized water, ultrasonically dispersed evenly, and the pH is adjusted to 4-5 with acetic acid to obtain dispersion A; the modifier is added to anhydrous tetrahydrofuran and stirred evenly to obtain solution B; solution B is slowly added to dispersion A under stirring, the temperature is raised to 60℃ and reacted for 4-8 hours. After the reaction is completed, the solid is separated by centrifugation, washed with anhydrous ethanol, and vacuum dried to obtain modified CeO2.
3. The high-temperature resistant rubber cable according to claim 2, characterized in that, The raw materials for preparing the modified CeO2 include the following components: by weight, 10-12 parts CeO2 particles, 180-200 parts anhydrous ethanol, 20-30 parts deionized water, 2-5 parts modifier, and 10-20 parts anhydrous tetrahydrofuran.
4. The high-temperature resistant rubber cable according to claim 2, characterized in that, The preparation process of the modifier is as follows: S1: Mix 3-allyl-2-hydroxybenzaldehyde, anhydrous ethanol, and hydrochloric acid, stir until homogeneous, and then slowly add ethylenediamine dropwise while maintaining vigorous stirring throughout the process. After the addition is complete, gradually raise the temperature to 60°C and react for 3-4 hours. After the reaction is complete, cool to room temperature, filter, wash, and dry to obtain intermediate A. S2: Mix intermediate A, anhydrous tetrahydrofuran and triethylamine, stir well, and slowly add phenylphosphonic dichloride dropwise under ice-water bath cooling. After the addition is complete, allow it to rise naturally to room temperature, and continue stirring for 2-6 hours. After the reaction is complete, perform post-processing to obtain intermediate B. S3: Intermediate B is mixed with anhydrous tetrahydrofuran and triethylamine, and 3-aminopropyltriethoxysilane is added under nitrogen protection. The mixture is stirred and heated to 50°C and reacted for 3-6 hours. After the reaction is completed, the mixture is post-treated to obtain the modifier.
5. A high-temperature resistant rubber cable according to claim 4, characterized in that, The raw materials for preparing intermediate A include the following components: by weight, 25-35 parts of 3-allyl-2-hydroxybenzaldehyde, 150-180 parts of anhydrous ethanol, 2-5 parts of hydrochloric acid, and 5-8 parts of ethylenediamine.
6. The high-temperature resistant rubber cable according to claim 4, characterized in that, The raw materials for preparing intermediate B include the following components: by weight, 15-18 parts intermediate A, 200-250 parts anhydrous tetrahydrofuran, 8-10 parts triethylamine, and 18-20 parts phenylphosphonic dichloride.
7. A high-temperature resistant rubber cable according to claim 4, characterized in that, The raw materials for preparing the modifier include the following components: by weight, 15-25 parts intermediate B, 150-180 parts anhydrous tetrahydrofuran, 5-10 parts triethylamine, and 15-25 parts 3-aminopropyltriethoxysilane.
8. A high-temperature resistant rubber cable according to claim 1, characterized in that, The antioxidants are antioxidant 1010 and antioxidant 168 in a mass ratio of 1:
2.
9. A high-temperature resistant rubber cable according to claim 1, characterized in that, The lubricant is one or more of calcium stearate, silicone masterbatch, and polyethylene wax.