Temperature-resistant and yellowing-resistant aging TPU cable material and preparation method thereof

Abstract

The application relates to the technical field of high polymer materials, in particular to a temperature-resistant and yellowing-resistant aging TPU cable material and a preparation method thereof, which comprises the following steps: S1, mixing and dehydrating hydrogenated hydroxyl polybutadiene and a functional additive to obtain a mixture; S2, reacting the mixture with isocyanate in the presence of a catalyst and a chain extender to obtain a polyurethane base material; S3, mixing the polyurethane base material with a filler, a flame retardant, a lubricant and a coupling agent to obtain a premix; and S4, melt extruding the premix to obtain the temperature-resistant and yellowing-resistant aging TPU cable material. The temperature-resistant and yellowing-resistant aging TPU cable material has good temperature resistance, aging resistance, impact resistance and flame retardance.

Description

Technical Field

[0001] This invention relates to the field of polymer materials technology, and in particular to a temperature-resistant and anti-yellowing aging-resistant TPU cable material and its preparation method. Background Technology

[0002] With the rapid development of industrial automation, rail transportation, new energy vehicles, medical equipment, and marine engineering, cables, as the core carriers of energy transmission and signal conduction, are facing increasingly harsh operating environments, placing unprecedented demands on the comprehensive performance of cable sheaths and insulation materials. Cable materials not only need to possess excellent mechanical strength, flexibility, and abrasion resistance, but also need to meet multiple performance indicators such as resistance to high and low temperatures, oil and chemical corrosion, and environmental friendliness. Simultaneously, they must be compatible with efficient processing technologies to meet the needs of large-scale production.

[0003] Currently, the traditional sheathing and insulation materials in the cable industry are mainly polyvinyl chloride (PVC), ordinary rubber (such as EPDM), and cross-linked polyethylene (XLPE). Among them, PVC was once widely used due to its low cost and simple processing, but it has significant drawbacks: it easily hardens and becomes brittle at low temperatures. When the temperature drops below -10°C, even slight bending or external impact can cause the sheath to crack, making it unsuitable for use in cold regions or low-temperature conditions. Furthermore, PVC contains halogens, which release toxic and harmful gases and dense smoke when burned, failing to meet current stringent global environmental regulations (such as RoHS and REACH certifications). The plasticizers added to PVC are also prone to migration and volatilization, leading to material aging, decreased mechanical properties, and shortened cable lifespan with long-term use. While ordinary rubber materials possess a certain degree of flexibility, the processing requires vulcanization, resulting in low production efficiency. They also lose resilience at temperatures below -20°C, are prone to internal cracking, and their oil resistance and wear resistance are insufficient to meet the high-frequency friction and vibration requirements of industrial automation, new energy vehicles, and other fields. While XLPE material solves some environmental and insulation problems, it has poor flexibility and insufficient resistance to bending and tearing, making it unsuitable for flexible cable scenarios that require frequent movement and bending.

[0004] Thermoplastic polyurethane (TPU), a polymer material combining the elasticity of rubber and the processing properties of plastics, is formed by block copolymerization of hard segments (diisocyanate and chain extender) and soft segments (long-chain polyols). With its excellent abrasion resistance, oil resistance, weather resistance, and wide temperature range adaptability (-60~120℃), it is gradually replacing traditional materials and becoming one of the preferred choices for high-end cable sheathing and insulation materials. TPU cable materials can be widely used in harsh environments such as industrial robot drag chain cables, high-voltage cables for new energy vehicles, medical equipment connection cables, and marine underwater cables. Its bending life can reach millions of cycles, maintaining good flexibility even below -40℃. It also possesses good biocompatibility and disinfection resistance, meeting the needs of the medical field. Furthermore, through formulation optimization, it can achieve low-smoke, halogen-free, and environmentally friendly characteristics, aligning with the development trend of the modern cable industry.

[0005] However, existing TPU cable materials still have many shortcomings in practical applications, limiting their further promotion and use. For example, patent number CN119144141A discloses "a halogen-free flame-retardant TPU cable material and its preparation method," which includes the following raw material components: 80-100 parts of polyurethane elastomer, 1-2 parts of antioxidant, 1-3 parts of stabilizer, 10-15 parts of plasticizer, 10-20 parts of filler, and 5-10 parts of flame-retardant glass powder. This TPU cable material has flame-retardant, wear-resistant, tensile-resistant, and high-temperature-resistant properties, while also being more environmentally friendly.

[0006] However, TPU cable materials will age and yellow due to ultraviolet radiation during long-term use, affecting their use. Therefore, there is an urgent need to develop a TPU cable material with excellent flame retardant and temperature resistance, as well as good anti-aging properties. Summary of the Invention

[0007] The purpose of this invention is to provide a temperature-resistant and anti-yellowing aging-resistant TPU cable material and its preparation method, so as to solve the problem that the temperature resistance of current TPU cable materials still needs to be improved, and the anti-aging performance is not good.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a method for preparing a temperature-resistant and yellowing-resistant TPU cable material, comprising the following steps: S1. Mix hydrogenated hydroxyl-terminated polybutadiene and functional additives, heat to 100-130°C and vacuum heat for 1-2 hours, then cool to room temperature to obtain a mixture; S2. Under an inert protective gas atmosphere, the mixture obtained in step S1 and the diisocyanate are heated at 75~80℃ for 1~2h, then dibutyltin dilaurate is added and the mixture is stirred at a constant temperature for 2~3h, then a chain extender is added and the temperature is lowered to 55~65℃ and stirred at a constant temperature for 2~4h. After the end, the mixture is dried at 55~65℃ for 12~24h to obtain a polyurethane substrate. S3. Mix the polyurethane substrate, filler, flame retardant, lubricant and coupling agent obtained in step S2, add them to a high-speed mixer and mix evenly to obtain a premix. S4. The premixed material obtained in step S3 is fed into a twin-screw extruder and melt-extruded to obtain a temperature-resistant and anti-yellowing aging-resistant TPU cable material.

[0009] This application first uses hydrogenated hydroxyl-terminated polybutadiene and functional additives to react with diisocyanate as a polyol. The hydrogenated hydroxyl-terminated polybutadiene has a long soft-segment chain, which effectively prevents the entry of oxygen and volatile compounds that can damage the molecular chain. The functional additives contain hindered amine structures. Hindered amines continuously capture free radicals and decompose peroxides through a "nitrogen oxide free radical cycle regeneration" mechanism, blocking the photo-oxidation chain reaction. The synergistic combination of the hindered amine structure and the soft-segment chain structure enhances the anti-aging performance of TPU through different anti-aging mechanisms. Simultaneously, the functional additives also contain a small amount of benzene ring structures. The π-π stacking between the benzene rings improves the high-temperature resistance of the TPU cable material. Furthermore, by mixing the obtained polyurethane substrate with fillers, flame retardants, lubricants, and coupling agents, the TPU cable material is endowed with excellent mechanical and flame-retardant properties.

[0010] In some embodiments, the mass ratio of the hydrogenated hydroxyl-terminated polybutadiene to the functional additive is 1:(0.05~0.2).

[0011] Preferably, the mass ratio of the hydrogenated hydroxyl-terminated polybutadiene to the functional additive is 1:0.15.

[0012] This application, by controlling the mass ratio of hydrogenated hydroxyl-terminated polybutadiene and functional additives, can, on the one hand, prevent the decrease in the temperature resistance of TPU due to the growth of soft segment chains; on the other hand, it can avoid excessive crosslinking leading to increased viscosity, which is detrimental to processing.

[0013] In some embodiments, in step S2, the mass ratio of the mixture to the diisocyanate is (5~7):1.

[0014] In some embodiments, the preparation method of the functional additive includes the following steps: (1) Mix 2-naphthaldehyde in the first solvent, add chitosan, heat to reflux and stir for 16-18 hours, filter, wash with the first solvent, and dry to obtain the intermediate; (2) Dissolve tetramethylpiperidone in a second solvent, add the intermediate obtained in step (1) to it, heat to reflux and stir for 16-18 hours, filter after completion, wash with the second solvent, dry, and obtain the functional additive.

[0015] The functional additives in this application utilize 2-naphthaldehyde and tetramethylpiperidone as main raw materials, grafting them onto the surface of chitosan via a Schiff base reaction to obtain hydroxyl-containing functional additives. These functional additives synergistically react with hydrogenated hydroxyl-terminated polybutadiene and diisocyanate to ultimately produce temperature-resistant and anti-yellowing TPU cable materials. The presence of numerous benzene ring structures in the functional additive structure improves the temperature resistance of TPU; furthermore, the hindered amine structure endows TPU with superior anti-aging and anti-yellowing capabilities.

[0016] In some embodiments, the mass ratio of 2-naphthaldehyde to chitosan is (0.2~0.4):1.

[0017] Preferably, the mass ratio of 2-naphthaldehyde to chitosan is 0.3:1.

[0018] In some embodiments, the mass ratio of tetramethylpiperidone to chitosan is (0.9~1.3):1.

[0019] Preferably, the mass ratio of tetramethylpiperidone to chitosan is 1:1.

[0020] In some embodiments, the first solvent is any one or more of chloroform, anhydrous methanol, anhydrous ethanol, diethyl ether, and acetone.

[0021] In some embodiments, the second solvent is any one or more of dimethyl sulfoxide, anhydrous methanol, anhydrous ethanol, and acetone.

[0022] In some embodiments, the chain extender is one or more of resorcinol di(2-hydroxyethyl) ether, neopentyl glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, 1,4-butanediol diglycidyl ether, hydrogenated bisphenol A diglycidyl ether, bisphenol A diglycidyl ether, ethylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, and dipropylene glycol diglycidyl ether.

[0023] In some embodiments, in step S3, by weight, the polyurethane substrate is 60-90 parts, the filler is 5-10 parts, the flame retardant is 2-5 parts, the lubricant is 1-3 parts, and the coupling agent is 0.5-1.5 parts.

[0024] In some embodiments, the filler is carbon black.

[0025] In some embodiments, the flame retardant is an organophosphorus flame retardant.

[0026] In some embodiments, the organophosphorus flame retardant is any one or more of tricresyl phosphate, triphenyl phosphate, diphenyl methyl phosphate, and tri(xyl) phosphate.

[0027] In some embodiments, the lubricant is any one or more of calcium stearate, zinc stearate, and polyethylene wax.

[0028] In some embodiments, the coupling agent is any one or more of 3-aminopropyltriethoxysilane, β-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and γ-mercaptopropyltrimethoxysilane.

[0029] Another aspect of the present invention provides a temperature-resistant and yellowing-resistant TPU cable material obtained by the above preparation method.

[0030] Compared with the prior art, the present invention has the following beneficial effects: (1) This invention first uses hydrogenated hydroxyl-terminated polybutadiene and functional additives to react with diisocyanate as a polyol. The hindered amine structure and soft chain structure work together to enhance the anti-aging performance of TPU through different anti-aging mechanisms. At the same time, the functional additives also contain a small amount of benzene ring structure, and the π-π stacking between the benzene rings improves the high temperature resistance of TPU cable material. In addition, by mixing the obtained polyurethane substrate with fillers, flame retardants, lubricants and coupling agents, TPU cable material is endowed with excellent mechanical properties and flame retardant properties.

[0031] (2) The functional additive of the present invention uses 2-naphthaldehyde and tetramethylpiperidone as the main raw materials, and grafts them onto the surface of chitosan through Schiff base reaction to obtain a functional additive containing hydroxyl groups. This functional additive can synergistically react with hydrogenated hydroxyl-terminated polybutadiene and diisocyanate to finally obtain a temperature-resistant and anti-yellowing TPU cable material. The functional additive contains a large number of benzene ring structures, which improves the temperature resistance of TPU. In addition, the hindered amine structure endows TPU with excellent anti-aging and anti-yellowing ability. Detailed Implementation

[0032] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. However, those skilled in the art will understand that the embodiments described below are some embodiments of the present invention, but not all embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0033] Unless otherwise specified, the post-processing operations described below, such as "mixing", "vacuum", "heating", "cooling", "stirring", and "melt extrusion", can be selected by those skilled in the art based on actual conditions, and are not further limited.

[0034] In the following preparation examples and embodiments, chitosan was purchased from Guangzhou Huayu Biotechnology Co., Ltd.; hydrogenated hydroxyl-terminated polybutadiene was purchased from Jiangshan Chemical (Shanghai) Co., Ltd.; and carbon black was purchased from Tianjin Baochi Chemical Technology Co., Ltd.

[0035] Preparation Example 1 The preparation method of the functional additive includes the following steps: (1) Mix 3g of 2-naphthaldehyde and dissolve it in 30ml of anhydrous ethanol. Add 10g of chitosan and heat to reflux. Stir at a constant temperature for 17h. After the reaction, filter, wash with chloroform, and dry at 60℃ for 5h to obtain the intermediate. (2) Dissolve 10g of tetramethylpiperidone in 100g of anhydrous methanol, add the intermediate obtained in step (1) to it, heat to reflux and stir for 17h, filter after completion, wash with anhydrous methanol, dry at 60℃ for 6h to obtain functional additive.

[0036] Preparation Example 2 The preparation method of the functional additive is the same as that in Preparation Example 1, except that the amount of 2-naphthaldehyde added is 5g.

[0037] Preparation Example 3 The preparation method of the functional additive is the same as that in Preparation Example 1, except that the amount of 2-naphthaldehyde added is 1g.

[0038] Preparation Example 4 The preparation method of the functional additive is the same as that in Preparation Example 1, except that the amount of tetramethylpiperidone added is 8g.

[0039] Example 1 A method for preparing a temperature-resistant and yellowing-resistant TPU cable material includes the following steps: S1. Mix 10g of hydrogenated hydroxyl-terminated polybutadiene and 1.5g of functional additives, heat to 115°C and vacuum heat for 1.5h, then cool to room temperature to obtain a mixture; S2. Under a N2 atmosphere, 10g of the mixture obtained in step S1 and 1.6g of isophorone diisocyanate were heated at 77°C for 1.5h. Then, 0.03g of dibutyltin dilaurate was added and the mixture was stirred at a constant temperature for 2.5h. Then, 0.5g of resorcinol di(2-hydroxyethyl) ether was added and the temperature was lowered to 60°C and stirred at a constant temperature for 3h. After the reaction was completed, the mixture was dried at 60°C for 18h to obtain a polyurethane substrate. S3. By mass, 70 parts of the polyurethane substrate obtained in step S2, 7 parts of carbon black, 3 parts of tricresyl phosphate, 2 parts of calcium stearate and 1 part of 3-aminopropyltriethoxysilane are mixed and added to a high-speed mixer and mixed evenly to obtain a premix. S4. The premixed material obtained in step S3 is fed into a twin-screw extruder (feeding section 150℃, plasticizing section 165℃, homogenizing section 175℃, die head section 170℃), and the screw speed is 160 rpm. The material is melt-extruded to obtain a temperature-resistant and yellowing-resistant TPU cable material.

[0040] The functional additive was prepared in Preparation Example 1.

[0041] Example 2 A method for preparing a temperature-resistant and yellowing-resistant TPU cable material includes the following steps: S1. Mix 10g of hydrogenated hydroxyl-terminated polybutadiene and 0.5g of functional additives, heat to 100°C and vacuum heat for 2 hours, then cool to room temperature to obtain a mixture; S2. Under a N2 atmosphere, 10g of the mixture obtained in step S1 and 1.43g of isophorone diisocyanate were heated at 75°C for 2h. Then, 0.03g of dibutyltin dilaurate was added and the mixture was stirred at a constant temperature for 3h. Then, 0.5g of resorcinol di(2-hydroxyethyl) ether was added and the temperature was lowered to 55°C and stirred at a constant temperature for 4h. After the reaction was completed, the mixture was dried at 55°C for 24h to obtain a polyurethane substrate. S3. By mass, mix 60 parts of the polyurethane substrate obtained in step S2, 5 parts of carbon black, 2 parts of tricresyl phosphate, 1 part of calcium stearate and 0.5 parts of 3-aminopropyltriethoxysilane, add them to a high-speed mixer and mix evenly to obtain a premix. S4. The premixed material obtained in step S3 is fed into a twin-screw extruder (feeding section 150℃, plasticizing section 165℃, homogenizing section 175℃, die head section 170℃), and the screw speed is 160 rpm. The material is melt-extruded to obtain a temperature-resistant and yellowing-resistant TPU cable material.

[0042] The functional additive was prepared in Preparation Example 1.

[0043] Example 3 A method for preparing a temperature-resistant and yellowing-resistant TPU cable material includes the following steps: S1. Mix 10g of hydrogenated hydroxyl-terminated polybutadiene and 2g of functional additives, heat to 130°C and vacuum heat for 1 hour, then cool to room temperature to obtain a mixture; S2. Under a N2 atmosphere, 10g of the mixture obtained in step S1 and 2g of isophorone diisocyanate were heated at 80°C for 1h. Then, 0.03g of dibutyltin dilaurate was added and the mixture was stirred at a constant temperature for 2h. Then, 0.5g of resorcinol di(2-hydroxyethyl) ether was added and the temperature was lowered to 65°C and stirred at a constant temperature for 2h. After the reaction was completed, the mixture was dried at 65°C for 12h to obtain a polyurethane substrate. S3. By mass, mix 90 parts of the polyurethane substrate obtained in step S2, 10 parts of carbon black, 5 parts of tricresyl phosphate, 3 parts of calcium stearate and 1.5 parts of 3-aminopropyltriethoxysilane, add them to a high-speed mixer and mix evenly to obtain a premix. S4. The premixed material obtained in step S3 is fed into a twin-screw extruder (feeding section 150℃, plasticizing section 165℃, homogenizing section 175℃, die head section 170℃), and the screw speed is 160 rpm. The material is melt-extruded to obtain a temperature-resistant and yellowing-resistant TPU cable material.

[0044] The functional additive was prepared in Preparation Example 1.

[0045] Example 4 A method for preparing a temperature-resistant and anti-yellowing aging TPU cable material is described. The specific implementation method is the same as in Example 1, except that the functional additives are prepared in Example 2.

[0046] Example 5 A method for preparing a temperature-resistant and anti-yellowing aging TPU cable material is described. The specific implementation method is the same as in Example 1, except that the functional additives are prepared in Example 3.

[0047] Example 6 A method for preparing a temperature-resistant and anti-yellowing aging TPU cable material is described. The specific implementation method is the same as in Example 1, except that the functional additives are prepared in Example 4.

[0048] Example 7 A method for preparing a temperature-resistant and anti-yellowing aging TPU cable material, the specific implementation method is the same as in Example 1, except that the functional additive is 0.4g.

[0049] Example 8 A method for preparing a temperature-resistant and anti-yellowing aging TPU cable material, the specific implementation method is the same as in Example 1, except that the functional additive is 3g.

[0050] Comparative Example 1 A method for preparing TPU cable material, the specific implementation method is the same as in Example 1, except that no functional additives are added.

[0051] Performance testing: (1) Temperature resistance test: The thermal stability of the sample was tested using a Q50 thermogravimetric analyzer from TA Instruments, USA. 5 mg of sample was placed in a crucible under N2 atmosphere. The temperature range was 30℃~600℃, and the heating rate was 10℃ / min. The 5% thermogravimetric temperature T of the sample was recorded. 5% and the 10% thermogravimetric temperature T of the sample 10% .

[0052] (2) Aging test: Refer to GB / T23987-2009 and GB / T1766-2008, 600h, to test the aging resistance level.

[0053] (3) Impact strength: Refer to ASTM D256, "Standard Test Method for Determination of Impact Strength of Plastic Cantilever Pendulum".

[0054] Each embodiment was tested according to the above method, and the test results are shown in Table 1.

[0055] Table 1 According to the data in Table 1, the TPU cable materials obtained in Examples 1-3 have good temperature resistance, anti-aging properties, and impact resistance. In Example 4, due to the change in the mass ratio of 2-naphthaldehyde and chitosan, 2-naphthaldehyde not only competes with tetramethylpiperidone for active sites, but also reduces the grafting rate of tetramethylpiperidone due to steric hindrance, thus reducing the aging resistance of the TPU cable material, but improving the temperature resistance to some extent. In Example 5, due to the change in the mass ratio of 2-naphthaldehyde and chitosan, the reduction of 2-naphthaldehyde provides more active sites for tetramethylpiperidone, but the temperature resistance of the TPU cable material decreases, and there is no room for improvement in the aging resistance. In Example 6, due to the change in the mass ratio of tetramethylpiperidone... The decrease in tetramethylpiperidone, due to its reduced mass ratio of piperidinone to chitosan, led to a decrease in the aging resistance of the TPU cable material. In Example 7, the change in the mass ratio of hydrogenated hydroxyl-terminated polybutadiene and functional additives resulted in an increase in the proportion of hydrogenated hydroxyl-terminated polybutadiene, leading to a decrease in the temperature resistance of the TPU cable material. However, the increase in flexible segments improved the impact resistance of the TPU cable material. In Example 8, the change in the mass ratio of hydrogenated hydroxyl-terminated polybutadiene and functional additives resulted in an increase in the proportion of functional additives, leading to an excessive crosslinking density in the TPU cable material, increased brittleness, and reduced impact resistance. In Comparative Example 1, the absence of functional additives resulted in a decrease in the temperature resistance and aging resistance of the TPU cable material, but an increase in impact resistance.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method for preparing a temperature-resistant and anti-yellowing aging-resistant TPU cable material, characterized in that, Includes the following steps: S1. Mix hydrogenated hydroxyl-terminated polybutadiene and functional additives, heat to 100-130°C and vacuum heat for 1-2 hours, then cool to room temperature to obtain a mixture; S2. Under an inert protective gas atmosphere, the mixture obtained in step S1 and the diisocyanate are heated at 75~80℃ for 1~2h, then dibutyltin dilaurate is added and the mixture is stirred at a constant temperature for 2~3h, then a chain extender is added and the temperature is lowered to 55~65℃ and stirred at a constant temperature for 2~4h. After the end, the mixture is dried at 55~65℃ for 12~24h to obtain a polyurethane substrate. S3. Mix the polyurethane substrate, filler, flame retardant, lubricant and coupling agent obtained in step S2, add them to a high-speed mixer and mix evenly to obtain a premix. S4. The premixed material obtained in step S3 is fed into a twin-screw extruder and melt-extruded to obtain a temperature-resistant and anti-yellowing aging-resistant TPU cable material.

2. The preparation method of the temperature-resistant and anti-yellowing aging-resistant TPU cable material according to claim 1, characterized in that, The mass ratio of the hydrogenated hydroxyl-terminated polybutadiene to the functional additive is 1:(0.05~0.2).

3. The preparation method of the temperature-resistant and anti-yellowing aging-resistant TPU cable material according to claim 1, characterized in that, The preparation method of the functional additive includes the following steps: (1) Mix 2-naphthaldehyde in the first solvent, add chitosan, heat to reflux and stir for 16-18 hours, filter, wash with the first solvent, and dry to obtain the intermediate; (2) Dissolve tetramethylpiperidone in a second solvent, add the intermediate obtained in step (1) to it, heat to reflux and stir for 16-18 hours, filter after completion, wash with the second solvent, dry, and obtain the functional additive.

4. The preparation method of the temperature-resistant and anti-yellowing aging-resistant TPU cable material according to claim 3, characterized in that, The mass ratio of 2-naphthaldehyde to chitosan is (0.2~0.4):

1.

5. The preparation method of the temperature-resistant and anti-yellowing aging-resistant TPU cable material according to claim 3, characterized in that, The mass ratio of tetramethylpiperidone to chitosan is (0.9~1.3):

1.

6. The preparation method of the temperature-resistant and yellowing-resistant TPU cable material according to claim 3, characterized in that, The first solvent is any one or more of chloroform, anhydrous methanol, anhydrous ethanol, diethyl ether, and acetone.

7. The preparation method of the temperature-resistant and anti-yellowing aging-resistant TPU cable material according to claim 3, characterized in that, The second solvent is any one or more of dimethyl sulfoxide, anhydrous methanol, anhydrous ethanol, and acetone.

8. The method for preparing the temperature-resistant and anti-yellowing aging-resistant TPU cable material according to claim 1, characterized in that, The chain extender is one or more of the following: resorcinol di(2-hydroxyethyl) ether, neopentyl glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, 1,4-butanediol diglycidyl ether, hydrogenated bisphenol A diglycidyl ether, bisphenol A diglycidyl ether, ethylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, and dipropylene glycol diglycidyl ether.

9. The method for preparing the temperature-resistant and anti-yellowing aging-resistant TPU cable material according to claim 1, characterized in that, By mass percentage, in step S3, the polyurethane substrate comprises 60-90 parts, the filler comprises 5-10 parts, the flame retardant comprises 2-5 parts, the lubricant comprises 1-3 parts, and the coupling agent comprises 0.5-1.5 parts.

10. A temperature-resistant and anti-yellowing aging TPU cable material obtained by the preparation method according to any one of claims 1 to 9.

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