A flame-retardant nylon material for automotive cable ties

Abstract

The present application discloses a flame-retardant nylon material for automobile cable ties, and relates to the technical field of flame-retardant materials, including the following raw materials by mass fraction: 100-150 parts of polyamide resin, 10-40 parts of glass fiber, 10-40 parts of toughening agent, 20-50 parts of modified flame retardant and 1-3 parts of coupling agent; the modified flame retardant includes the following raw materials: piperidine modified material, phosphorus flame retardant component, nitrogen flame retardant component and inorganic flame retardant component; the raw materials of piperidine modified material include bisphenol, piperidine and unsaturated carboxylic acid. The modified flame retardant can absorb the heat generated by the reaction, and by changing the combustion process of the material, reduce the combustible material, thereby achieving efficient flame retardancy, the piperidine modified material, can absorb the free radicals generated by combustion to inhibit the combustion chain reaction, reduce the flame density and flame spread efficiency, and can also play a better flame retardant effect in the face of a fast-spreading fire, thereby improving the safety performance of the material.

Description

Technical Field

[0001] The present application relates to the technical field of flame retardant materials, and in particular to a flame retardant nylon material for automotive cable ties. Background Art

[0002] Flame-retardant nylon materials are widely used in the fields of electronics, automobile manufacturing, etc. When used in automobile cable ties, automobile cable ties with excellent flame retardant properties can prevent cables from scattering in a burning environment and improve the safety performance of the car. Therefore, the development of nylon materials with excellent performance has become a research hotspot in the industry, which can not only improve the safety of products, but also meet the increasingly stringent environmental regulations. At present, the commonly used methods to solve the flame retardant problem of nylon materials mainly include adding a single flame retardant or a simple mixture of several flame retardants. The former usually uses phosphorus or nitrogen flame retardants, and the latter improves the flame retardant effect of nylon materials by mixing different types of flame retardants such as phosphorus and nitrogen.

[0003] Invention patent publication number CN115819959A discloses a method for flame retardant short glass fiber reinforced nylon material with high polymerization degree ammonium polyphosphate, which belongs to the technical field of nylon composite materials. In this method, an intumescent flame retardant system is first used, which includes APP (ammonium polyphosphate), pentaerythritol and melamine as flame retardants. By soaking the chopped glass fibers in MEL, a nylon composite material with specific flame retardant properties is successfully prepared. Further, a new intumescent flame retardant is formed by combining polyphosphoric acid-modified phenolic resin with high polymerization degree APP and MEL, and another nylon composite material is prepared accordingly. In addition, basic magnesium sulfate whiskers and high polymerization degree compound are used as flame retardants, and then a third nylon composite material is prepared. The effect of using APP, pentaerythritol and melamine as flame retardants is mainly to promote the dehydration and carbonization of the material to form a carbonized layer to achieve a flame retardant effect, but for a fire that spreads faster, the dehydration and carbonization effect cannot effectively prevent the spread of the fire. Summary of the invention

[0004] In order to solve the problem that flame retardants cannot effectively prevent the spread of fire when the fire spreads quickly, the purpose of this application is to provide a flame retardant nylon material for automotive cable ties.

[0005] The flame-retardant nylon material for automotive cable ties provided in this application adopts the following technical solution: A flame-retardant nylon material for automobile cable ties comprises the following raw materials in mass fractions: 100-150 parts of polyamide resin, 10-40 parts of glass fiber, 10-40 parts of toughening agent, 20-50 parts of modified flame retardant and 1-3 parts of coupling agent; The modified flame retardant comprises the following raw materials: piperidine modified material, phosphorus flame retardant component, nitrogen flame retardant component and inorganic flame retardant component; The raw materials of the piperidine modified material include bisphenol, piperidine and unsaturated carboxylic acid, wherein the molar ratio of the bisphenol, the piperidine and the unsaturated carboxylic acid is 1:(0.6-0.8):(0.3-0.5); By adopting the above technical scheme, the flame-retardant nylon material achieves excellent flame-retardant effect while ensuring mechanical properties. Polyamide resin as a matrix provides good mechanical strength and processing performance, glass fiber and toughening agent further improve the mechanical properties and toughness of the material, and coupling agent improves the compatibility and bonding between the components. The modified flame retardant is composed of piperidine modified materials and phosphorus, nitrogen and inorganic flame retardant components. It can absorb the heat generated by the reaction and reduce combustible substances by changing the combustion process of the material, thereby achieving high-efficiency flame retardancy. In addition, piperidine modified materials can absorb free radicals generated by combustion to inhibit the combustion chain reaction, reduce flame density and flame spread efficiency, and can also play a better flame retardant effect in the face of a fast-spreading fire, thereby improving the safety performance of the material.

[0006] Optionally, the phosphorus-based flame retardant component is selected from one or more of red phosphorus, ammonium polyphosphate, phosphates, ammonium phosphate salts, phosphate esters and phosphate esters, the nitrogen-based flame retardant component is selected from one or more of ammonium chloride, ammonium sulfate, dicyandiamide, melamine, cyanuric acid and melamine cyanurate, and the inorganic flame retardant component is selected from one or more of magnesium hydroxide, aluminum hydroxide, zinc chloride, zirconium disilicide, kaolin and microcrystalline ceramics.

[0007] By adopting the above technical scheme, the selected phosphorus-based flame retardant components and nitrogen-based flame retardant components can promote the formation of a carbonized layer during the combustion process, isolate oxygen and heat, thereby achieving a flame retardant effect, and dilute the oxygen concentration in the air by releasing non-combustible gases. At the same time, they absorb a large amount of heat to lower the surface temperature of the material, thereby inhibiting the combustion reaction. The selected inorganic flame retardant components exert their effects through physical means, such as isolating the air, absorbing a large amount of heat to lower the temperature, etc.

[0008] Optionally, the bisphenol is selected from one of bisphenol A, bisphenol F and bisphenol S, the piperidine is selected from one of 3,5-dimethylpiperidine, 3-methylaminopiperidine, 4-dimethylaminopiperidine, 2-hydroxypiperidine and tetramethylpiperidine, and the unsaturated carboxylic acid is selected from one of acrylic acid, crotonic acid and pentenoic acid.

[0009] By adopting the above technical solution, Optionally, the preparation of the piperidine modified material comprises the following steps: S001, dissolving piperidine in deionized water, adding sulfuric acid, stirring evenly, and then adding bisphenol to disperse evenly, and stirring is maintained during the reaction process. After the reaction is completed, filtering and washing to obtain an intermediate product; S002, adding the intermediate product prepared in step S001, unsaturated carboxylic acid, triethylamine and cupric acetate into an organic solvent, stirring evenly, and dropping phosphorus oxychloride. After the reaction is completed, the piperidine modified material is obtained after separation, washing and crystallization.

[0010] By adopting the above technical scheme, the flame-retardant nylon material is prepared into a piperidine-modified material through specific steps, which ensures that the piperidine-modified material has good dispersibility and chemical stability, thereby improving the overall flame retardant effect of the modified flame retardant and the comprehensive performance of the material. Specifically, in step S001, piperidine fully reacts with bisphenol under the action of sulfuric acid to form an intermediate product, which ensures the basic structural stability of the piperidine-modified material; in step S002, the molecular structure of the piperidine-modified material is further optimized by using an organic solvent, an unsaturated carboxylic acid, triethylamine and cupric acetate, which enhances its synergistic effect with phosphorus-based and nitrogen-based flame retardant components, and significantly improves the flame retardant effect.

[0011] Optionally, in the step S001, the reaction process is continued at 25-35°C for 1-3 hours, and in the step S002, the reaction process is continued at 50-65°C for 1.5-2.5 hours.

[0012] By adopting the above technical solution, the reaction can be completed without too high a temperature in an environment where concentrated sulfuric acid is used as a catalyst. Step S001 is carried out at 25-35°C for 1-3 hours to ensure that the reaction is stable and sufficient, and to avoid the generation of harmful gases and by-products. Step S002 is carried out at 50-65°C for 1.5-2.5 hours to avoid the reaction from destroying the intermediate product, which is conducive to ensuring the stable synthesis of the piperidine modified material.

[0013] Optionally, the preparation method of the modified flame retardant comprises the following steps: S011, activating the inorganic flame retardant component at 200-300° C. for 3-5 hours, and after the activation is completed, cooling to room temperature to obtain an activated product; S012, mixing the piperidine modified material, the phosphorus-based flame retardant component and the nitrogen-based flame retardant component into the activated product prepared in step S01 to obtain a modified flame retardant.

[0014] By adopting the above technical scheme, the preparation method of the modified flame retardant activates the inorganic flame retardant component at high temperature to enhance the surface activity, and then mixes it with the piperidine modified material, the phosphorus flame retardant component and the nitrogen flame retardant component, thereby improving the dispersibility of the modified flame retardant and the compatibility with the base material, ensuring the uniform dispersion and synergistic effect between the components, thereby enhancing the flame retardant effect and the comprehensive performance of the material.

[0015] Optionally, the polyamide resin is selected from one or more of PA66, PA56, and PA6.

[0016] Optionally, the glass fiber is selected from one of soda lime silicate glass fiber, calcium borosilicate glass fiber, calcium aluminate glass fiber and magnesium aluminum silicate glass fiber.

[0017] Optionally, the toughening agent is selected from one or more of phthalates, phosphates, citrates and phthalates.

[0018] By adopting the above technical scheme, the specific types of polyamide resin, glass fiber and toughening agent are optimized, and the mechanical properties, flame retardant properties and processing properties of the flame retardant nylon material are improved.

[0019] Optionally, the preparation method of the flame-retardant nylon material includes the following steps: mixing and stirring the polyamide resin, glass fiber, toughening agent, modified flame retardant and coupling agent at 200-250° C. until the mixture is uniformly mixed, extruding using an extruder, and then cooling, granulating and drying to obtain the flame-retardant nylon material.

[0020] By adopting the above technical solution, at 200-250°C, each component is in a melted state, which can achieve uniform mixing of raw materials and improve the stability of performance. The flame retardant nylon material is prepared by an extruder, and then goes through cooling, granulation and drying processes, so that the product structure quality of the flame retardant nylon material is stable and easy to use.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. Flame-retardant nylon materials achieve excellent flame-retardant effects while ensuring mechanical properties. Polyamide resin as a matrix provides good mechanical strength and processing performance, glass fiber and toughening agent further improve the mechanical properties and toughness of the material, and coupling agent improves the compatibility and bonding between the components. The modified flame retardant is composed of piperidine modified materials and phosphorus, nitrogen and inorganic flame retardant components. It can absorb the heat generated by the reaction and reduce combustible substances by changing the combustion process of the material, thereby achieving high-efficiency flame retardancy. In addition, piperidine modified materials can absorb free radicals generated by combustion to inhibit the combustion chain reaction, reduce flame density and flame spread efficiency, and have a better flame retardant effect even in the face of a fire that spreads quickly, thereby improving the safety performance of the material; 2. The flame-retardant nylon material is prepared by a specific step of piperidine modified material, which ensures that the piperidine modified material has good dispersibility and chemical stability, thereby improving the overall flame retardant effect of the modified flame retardant and the comprehensive performance of the material. Specifically, in step S001, piperidine fully reacts with bisphenol under the action of sulfuric acid to form an intermediate product, ensuring the basic structural stability of the piperidine modified material; in step S002, the molecular structure of the piperidine modified material is further optimized by using organic solvents, unsaturated carboxylic acids, triethylamine and copper acetate, enhancing its synergistic effect with phosphorus and nitrogen flame retardant components, and significantly improving the flame retardant effect; 3. The preparation method of the modified flame retardant improves the dispersibility and compatibility of the modified flame retardant with the base material by activating the inorganic flame retardant component at high temperature, improving the surface activity, and then mixing with the piperidine modified material, phosphorus flame retardant component and nitrogen flame retardant component, thereby ensuring the uniform dispersion and synergy between the components, thereby enhancing the flame retardant effect and the comprehensive performance of the material. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with embodiments and comparative examples.

[0023] In the following preparation examples, embodiments and comparative examples, the selected polyamide resin is PA66, the selected glass fiber is calcium borosilicate glass fiber, the selected toughening agent is phthalate, the selected coupling agent is silane coupling agent, the selected phosphorus flame retardant component is ammonium polyphosphate, the selected nitrogen flame retardant component is melamine, and the selected inorganic flame retardant component is a mixture of magnesium hydroxide and zirconium disilicide. The selected bisphenols are bisphenol A, bisphenol F and bisphenol S, the selected piperidines are 3,5-dimethylpiperidine and tetramethylpiperidine, the selected unsaturated carboxylic acids are acrylic acid and crotonic acid, and the selected organic solvent is benzene.

[0024] Preparation Example 1 The preparation of the piperidine modified material comprises the following steps: A001, dissolve 3.16g of 3,5-dimethylpiperidine in 200ml of deionized water, add 20ml of 98% concentrated sulfuric acid, stir evenly, then add 9.12g of bisphenol A and disperse evenly, react at 30°C for 2h, keep stirring during the reaction process, after the reaction is completed, filter out the reaction product, wash with sodium bicarbonate solution until neutral, wash with deionized water, and then dry at 30-40°C to obtain an intermediate product; A002. Add all the intermediate product prepared in step S001 to 150 ml of organic solvent, then add 1.16 g of acrylic acid, 1.08 g of triethylamine and 0.12 g of cupric acetate, stir evenly, raise the temperature to 58 ° C and maintain stirring, gradually add 2.45 g of phosphorus oxychloride dropwise within 2 hours, and after the reaction is completed, extract and wash several times with deionized water, separate the oil layer, cool the oil layer, separate the precipitated crystals, and dry the crystals to obtain the piperidine modified material.

[0025] Preparation Example 2 The preparation of the piperidine modified material comprises the following steps: A001, dissolve 3.61g 3,5-dimethylpiperidine in 200ml deionized water, add 20ml 98% concentrated sulfuric acid, stir evenly, add 9.12g bisphenol A and disperse evenly, react at 30°C for 2h, keep stirring during the reaction, after the reaction is completed, filter out the reaction product, wash with sodium bicarbonate solution until neutral, wash with deionized water, and then dry at 30-40°C to obtain an intermediate product; A002. Add all the intermediate product prepared in step S001 to 150 ml of organic solvent, then add 1.44 g of acrylic acid, 1.36 g of triethylamine and 0.15 g of cupric acetate, stir evenly, raise the temperature to 58 ° C and maintain stirring, gradually add 3.06 g of phosphorus oxychloride dropwise within 2 hours, and after the reaction is completed, extract and wash several times with deionized water, separate the oil layer, cool the oil layer, separate the precipitated crystals, and dry the crystals to obtain the piperidine modified material.

[0026] Preparation Example 3 The preparation of the piperidine modified material comprises the following steps: A001, dissolve 2.71g 3,5-dimethylpiperidine in 200ml deionized water, add 20ml 98% concentrated sulfuric acid, stir evenly, add 9.12g bisphenol A and disperse evenly, react at 30°C for 2h, keep stirring during the reaction, after the reaction is completed, filter out the reaction product, wash with sodium bicarbonate solution until neutral, wash with deionized water, and then dry at 30-40°C to obtain an intermediate product; A002. Add all the intermediate product prepared in step S001 to 150 ml of organic solvent, then add 0.86 g of acrylic acid, 0.82 g of triethylamine and 0.07 g of cupric acetate, stir evenly, raise the temperature to 58 ° C and maintain stirring, gradually add 1.84 g of phosphorus oxychloride dropwise within 2 hours, and after the reaction is completed, extract and wash several times with deionized water, separate the oil layer, cool the oil layer, separate the precipitated crystals, and dry the crystals to obtain the piperidine modified material.

[0027] Preparation Example 4 The preparation of the piperidine modified material comprises the following steps: A001. Dissolve 3.16 g of 3,5-dimethylpiperidine in 200 ml of deionized water, add 20 ml of 98% concentrated sulfuric acid, stir evenly, add 9.89 g of bisphenol S and disperse evenly, react at 30° C. for 2 h, keep stirring during the reaction, and after the reaction is completed, filter out the reaction product, wash with sodium bicarbonate solution until neutral, wash with deionized water, and then dry at 30-40° C. to obtain an intermediate product; A002. Add all the intermediate product prepared in step S001 to 150 ml of organic solvent, then add 1.16 g of acrylic acid, 1.08 g of triethylamine and 0.12 g of cupric acetate, stir evenly, raise the temperature to 58 ° C and maintain stirring, gradually add 2.45 g of phosphorus oxychloride dropwise within 2 hours, and after the reaction is completed, extract and wash several times with deionized water, separate the oil layer, cool the oil layer, separate the precipitated crystals, and dry the crystals to obtain the piperidine modified material.

[0028] Preparation Example 5 The preparation of the piperidine modified material comprises the following steps: A001, dissolve 3.95g 3,5-dimethylpiperidine in 200ml deionized water, add 20ml 98% concentrated sulfuric acid, stir evenly, then add 9.12g bisphenol A and disperse evenly, react at 30°C for 2h, keep stirring during the reaction process, after the reaction is completed, filter out the reaction product, wash with sodium bicarbonate solution until neutral, wash with deionized water, and then dry at 30-40°C to obtain an intermediate product; A002. Add all the intermediate product prepared in step S001 to 150 ml of organic solvent, then add 1.38 g of crotonic acid, 1.08 g of triethylamine and 0.12 g of cupric acetate, stir evenly, raise the temperature to 58 ° C and maintain stirring, gradually add 2.45 g of phosphorus oxychloride dropwise within 2 hours, and after the reaction is completed, extract and wash several times with deionized water, separate the oil layer, cool the oil layer, separate the precipitated crystals, and dry the crystals to obtain the piperidine modified material.

[0029] Example 1 The preparation of flame retardant nylon material comprises the following steps: S011, mixing magnesium hydroxide and zirconium disilicide in a mass ratio of 1:1, activating the mixture at 250° C. for 4 hours, and obtaining an activated product after the activation is completed; S012, taking 60 g of the activated product prepared in step S012, and mixing it with 100 g of the piperidine modified material prepared in Preparation Example 1, 75 g of ammonium polyphosphate and 75 g of melamine to obtain a modified flame retardant; S013, at 230°C, melt-mix 125g PA66, 25g calcium borosilicate glass fiber and 25g phthalate, then add 35g of the modified flame retardant prepared in step S012 and 2g of silane coupling agent, mix until uniform, then add to a twin-screw extruder, melt-extrude at a temperature of 200-210°C, a rotation speed of 420rpm, and a vacuum degree of 0.08-0.05MPa. After cooling, granulation and drying, a flame-retardant nylon material is obtained.

[0030] Example 2 The preparation of flame retardant nylon material comprises the following steps: S011, mixing magnesium hydroxide and zirconium disilicide in a mass ratio of 1:1, activating the mixture at 250° C. for 4 hours, and obtaining an activated product after the activation is completed; S012, taking 60 g of the activated product prepared in step S012, mixing it with 100 g of the piperidine modified material prepared in Preparation Example 1, 75 g of ammonium polyphosphate and 75 g of melamine to obtain a modified flame retardant; S013, at 230°C, melt-mix 125g PA66, 25g calcium borosilicate glass fiber and 25g phthalate, then add 35g of the modified flame retardant prepared in step S012 and 2g of silane coupling agent, mix until uniform, then add to a twin-screw extruder, melt-extrude at a temperature of 200-210°C, a rotation speed of 420rpm, and a vacuum degree of 0.08-0.05MPa. After cooling, granulation and drying, a flame-retardant nylon material is obtained.

[0031] Example 3 The preparation of flame retardant nylon material comprises the following steps: S011, mixing magnesium hydroxide and zirconium disilicide in a mass ratio of 1:1, activating the mixture at 250° C. for 4 hours, and obtaining an activated product after the activation is completed; S012, taking 60 g of the activated product prepared in step S012, mixing it with 100 g of the piperidine modified material prepared in Preparation Example 1, 75 g of ammonium polyphosphate and 75 g of melamine to obtain a modified flame retardant; S013, at 230°C, melt-mix 125g PA66, 25g calcium borosilicate glass fiber and 25g phthalate, then add 35g of the modified flame retardant prepared in step S012 and 2g of silane coupling agent, mix until uniform, then add to a twin-screw extruder, melt-extrude at a temperature of 200-210°C, a rotation speed of 420rpm, and a vacuum degree of 0.08-0.05MPa. After cooling, granulation and drying, a flame-retardant nylon material is obtained.

[0032] Example 4 The difference from Example 1 is that an equal mass of the piperidine modified material prepared in Preparation Example 2 is used to replace the piperidine modified material prepared in Preparation Example 1.

[0033] Example 5 The difference from Example 1 is that an equal mass of the piperidine modified material prepared in Preparation Example 3 is used to replace the piperidine modified material prepared in Preparation Example 1.

[0034] Example 6 The difference from Example 1 is that an equal mass of the piperidine modified material prepared in Preparation Example 4 is used to replace the piperidine modified material prepared in Preparation Example 1.

[0035] Example 7 The difference from Example 1 is that an equal mass of the piperidine modified material prepared in Preparation Example 5 is used to replace the piperidine modified material prepared in Preparation Example 1.

[0036] Comparative Example 1 The difference from Example 1 is that an equal mass of tetramethylpiperidine is used to replace the piperidine modified material prepared in Preparation Example 1.

[0037] Comparative Example 2 The difference from Example 1 is that the piperidine modified material prepared in Preparation Example 1 is not added, and the activated product, ammonium polyphosphate and melamine are used in proportion instead.

[0038] The flame retardant nylon materials prepared in the examples and comparative examples were tested for their performance. Flame retardant performance test: Use UL94 standard for flame retardant performance test; Mechanical properties test: Use ISO527 standard to test tensile strength and elongation at break; Table 1 Performance test results of flame retardant nylon materials prepared in Examples and Comparative Examples Flame retardant properties Tensile strength / MPa Elongation at break / % Example 1 V0 78.6 18.6 Example 2 V0 78.4 17.8 Example 3 V0 77.5 18.0 Example 4 V0 77.9 18.6 Example 5 V0 77.8 18.4 Example 6 V0 79.1 17.3 Example 7 V0 77.6 17.5 Comparative Example 1 V2 78.4 18.2 Comparative Example 2 V2 78.2 17.7 The performance of the diaphragm coating prepared in the present application is explored in combination with Table 1, Examples and Comparative Examples.

[0039] Comparing Examples 1, 2 and 3, the difference is that the raw material ratios of the flame-retardant nylon materials are different. It can be seen that the flame-retardant nylon materials prepared in Examples 1, 2 and 3 all have better flame retardant properties, and can reach the level of nylon materials in tensile strength and elongation at break tests, indicating that the flame-retardant nylon prepared with different raw material ratios has better flame retardant properties and mechanical properties.

[0040] Comparing Example 1, Example 4 to Example 7, the difference is that the raw material components and proportions of the piperidine modified material are different. It can be seen that the flame-retardant nylon materials prepared in Example 1, Example 4 to Example 7 all have better flame retardant properties, and can reach the level of nylon materials in tensile strength and elongation at break tests. While having flame retardant properties, mechanical properties are also excellent. It shows that the piperidine modified materials prepared by the above components and proportions have better flame retardant properties after adding flame retardants.

[0041] Comparative Example 1, Comparative Example 1 and Comparative Example 2 are different in that the components of the modified flame retardant are different. Comparative Example 1 uses an equal mass of tetramethylpiperidine to replace the piperidine modified material prepared in Preparation Example 1, and Comparative Example 2 does not add the piperidine modified material prepared in Preparation Example 1, and uses the activated product, ammonium polyphosphate and melamine in proportion instead. It can be seen that the flame retardant properties of Comparative Examples 1 and 2 are significantly reduced, indicating that the piperidine modified material prepared in this application can significantly enhance the flame retardant properties of nylon flame retardant materials.

[0042] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

[0043] The embodiments of the embodiment are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A flame-retardant nylon material for automotive cable ties, characterized in that: The invention comprises the following raw materials in mass fractions: 100-150 parts of polyamide resin, 10-40 parts of glass fiber, 10-40 parts of toughening agent, 20-50 parts of modified flame retardant and 1-3 parts of coupling agent; The modified flame retardant comprises the following raw materials: piperidine modified material, phosphorus flame retardant component, nitrogen flame retardant component and inorganic flame retardant component; The raw materials of the piperidine modified material include bisphenol, piperidine and unsaturated carboxylic acid, wherein the molar ratio of the bisphenol, the piperidine and the unsaturated carboxylic acid is 1: (0.6-0.8): (0.3-0.5); According to claim 1, a flame-retardant nylon material for automotive cable ties is characterized in that the phosphorus-based flame-retardant component is selected from one or more of red phosphorus, ammonium polyphosphate, phosphate, ammonium phosphate salt, phosphate ester and phosphate ester, the nitrogen-based flame-retardant component is selected from one or more of ammonium chloride, ammonium sulfate, dicyandiamide, melamine, cyanuric acid and melamine cyanurate, and the inorganic flame-retardant component is selected from one or more of magnesium hydroxide, aluminum hydroxide, zinc chloride, zirconium disilicide, kaolin and microcrystalline ceramics.

2. The flame-retardant nylon material for automotive cable ties according to claim 1, characterized in that: The bisphenol is selected from one of bisphenol A, bisphenol F and bisphenol S, the piperidine is selected from one of 3,5-dimethylpiperidine, 3-methylaminopiperidine, 4-dimethylaminopiperidine, 2-hydroxypiperidine and tetramethylpiperidine, and the unsaturated carboxylic acid is selected from one of acrylic acid, crotonic acid and pentenoic acid.

3. The flame-retardant nylon material for automotive cable ties according to claim 1, characterized in that: The preparation of the piperidine modified material comprises the following steps: S001, dissolving piperidine in deionized water, adding sulfuric acid, stirring evenly, and then adding bisphenol to disperse evenly, and stirring is maintained during the reaction process. After the reaction is completed, filtering and washing to obtain an intermediate product; S002, adding the intermediate product prepared in step S001, unsaturated carboxylic acid, triethylamine and cupric acetate into an organic solvent, stirring evenly, and dropping phosphorus oxychloride. After the reaction is completed, the piperidine modified material is obtained after separation, washing and crystallization.

4. The flame-retardant nylon material for automotive cable ties according to claim 4, characterized in that: In the step S001, the reaction process is continued at 25-35°C for 1-3 hours, and in the step S002, the reaction process is continued at 50-65°C for 1.5-2.5 hours.

5. The flame-retardant nylon material for automotive cable ties according to claim 1, characterized in that: The preparation method of the modified flame retardant comprises the following steps: S011, activating the inorganic flame retardant component at 200-300° C. for 3-5 hours, and obtaining an activated product after the activation is completed; S012, mixing the piperidine modified material, the phosphorus-based flame retardant component and the nitrogen-based flame retardant component into the activated product prepared in step S01 to obtain a modified flame retardant.

6. The flame-retardant nylon material for automotive cable ties according to claim 1, characterized in that: The polyamide resin is selected from one or more of PA66, PA56 and PA6.

7. The flame-retardant nylon material for automotive cable ties according to claim 1, characterized in that: The glass fiber is selected from one of soda lime silicate glass fiber, calcium borosilicate glass fiber, calcium aluminate glass fiber and magnesium aluminum silicate glass fiber.

8. The flame-retardant nylon material for automotive cable ties according to claim 1, characterized in that: The toughening agent is selected from one or more of phthalates, phosphates, citrates and phthalates.

9. The flame-retardant nylon material for automotive cable ties according to claim 1, characterized in that: The preparation method of the flame-retardant nylon material comprises the following steps: melt-mixing the polyamide resin, glass fiber and toughening agent at 200-250° C., adding a modified flame retardant and a coupling agent, mixing until uniform, extruding using an extruder, and then cooling, granulating and drying to obtain the flame-retardant nylon material.