Thermoplastic TPV elastomer composition and its preparation method and application

Abstract

The application discloses a thermoplastic TPV elastomer composition and a preparation method and application thereof, and belongs to the technical field of polymer material modification. The thermoplastic TPV elastomer composition is prepared from butyronitrile rubber, long carbon chain nylon, a plasticizer, a vulcanizing agent, a compatibilizer, an antioxidant, a reinforcing agent, a light stabilizer and a color masterbatch, wherein the butyronitrile rubber has a Mooney viscosity of M L 100 DEG C (1+4) 42-76, the acrylonitrile content is 26%-42%, and the long carbon chain nylon has a melt flow rate of 5-30 g / 10 min under the condition of 235 DEG C / 2.16 kg. The butyronitrile rubber masterbatch and the long carbon chain nylon are dynamically vulcanized to prepare the TPV through a phase mixing method. The thermoplastic TPV elastomer composition prepared by the application has good heat resistance and mechanical properties, and meets the application requirements of the new energy automobile temperature-resistant 125 DEG C cable insulation material.

Description

Technical Field

[0001] This invention belongs to the field of polymer material modification technology, specifically thermoplastic TPV elastomer compositions, their preparation methods, and applications. Background Technology

[0002] With the rapid development of new energy vehicles, fast battery charging and long driving range have become two core demands of consumers. Improving the temperature resistance of insulation materials in the cables of new energy electric vehicles can effectively enhance their current transmission capacity. Raising the rated operating temperature of cables in conventional fuel-powered vehicles from 105℃ to 125℃ can increase the current transmission capacity by 10% to 20% for the same conductor cross-sectional area. While meeting the required current transmission capacity, high-temperature-resistant cables can reduce weight by 10% to 20%, thereby reducing the overall weight of new energy electric vehicles and increasing their driving range.

[0003] Long-chain nylon typically refers to nylon with more than 10 methylene groups in its long chain segments. Due to the longer methylene units and lower amide group density in the molecular chain, long-chain nylon combines the properties of PA6, PA66, and polyolefins. This results in characteristics such as low water absorption, good insulation, good flexibility, good dimensional stability, low density, low temperature resistance, oil resistance, chemical resistance, good self-lubrication, and excellent impact resistance, making it an ideal choice for cable insulation materials in new energy electric vehicles. However, intrinsic long-chain nylon materials have a long-term operating temperature range of 80-90℃, which cannot meet the electrical connection requirements of high-temperature areas such as automotive engine compartments.

[0004] Currently, the mainstream insulation materials for cables with heat resistance ratings of C (125℃) or D (150℃) are thermosetting materials such as cross-linked polyolefins or silicone rubber. Cross-linked polyolefins require specialized post-cross-linking equipment, and cross-linked polyolefin cables have poor flexibility, which cannot meet the installation requirements of new energy vehicles; silicone rubber cables have good flexibility, but require specialized vulcanization equipment for processing and are expensive.

[0005] How to prepare thermoplastic automotive cable insulation materials with high heat resistance and high flexibility has become an urgent problem to be solved. Summary of the Invention

[0006] In view of this, the present invention provides a thermoplastic TPV elastomer composition, its preparation method and application, which prepares a cable insulation material that meets the temperature resistance rating of 125°C by dynamically vulcanizing nitrile rubber containing polar cyano groups in long carbon chain nylon.

[0007] The first object of the present invention is to provide a thermoplastic TPV elastomer composition prepared from the following raw materials in parts by weight: 50-70 parts of nitrile rubber, 30-50 parts of long-chain carbon nylon 3-6 parts plasticizer Vulcanizing agent 0.5-2 parts, Compatibilizer 1-3.5 parts, Antioxidant 0.2-3 parts, Reinforcing agent 1.5-16.5 parts, 0-1 part light stabilizer 0-2 parts of color masterbatch; Wherein, the Mooney viscosity M of the nitrile rubber L The temperature at 100℃ (1+4) is 42-76, and the acrylonitrile content is 26%-42%; the melt flow rate of the long carbon chain nylon at 235℃ / 2.16kg is 5-30g / 10min.

[0008] The Mooney viscosity M of the nitrile rubber L The Mooney viscosity of nitrile rubber (NBR) at 100℃ (1+4) is 42-76, with an acrylonitrile content of 26%-42%. If the Mooney viscosity of NBR is too low, it easily sticks to the rollers, making mixing difficult and resulting in insufficient tensile strength of the vulcanized product. If the Mooney viscosity of NBR is too high, it easily leads to uneven mixing and extrusion processing difficulties, and also deteriorates the dispersion uniformity of the rubber compound in the nylon matrix during the initial vulcanization stage, affecting the composition performance. The lower the acrylonitrile content in the NBR, the worse its heat resistance; if the acrylonitrile content is too high, the elasticity of the NBR is poor, and the processing difficulty and cost will increase significantly. Preferably, the acrylonitrile content in the NBR is 30%-35%. The melt flow rate of the long-chain nylon at 235℃ / 2.16kg is 5-30g / 10min. If the melt flow index of the nylon is too low, the material is difficult to process; if the melt flow index of the nylon is too high, the material processing stability is poor, easily causing uneven thickness of the extruded coating layer.

[0009] Further, the long-chain nylon is selected from at least one of PA610, PA612, PA613, PA614, PA615, PA1010, PA1012, PA1013, PA1014, PA1015, PA11, PA12, PA1212, PA1213, PA1214, PA1215, PA610 / PA66, PA612 / PA66, PA612 / PA610, PA612 / PA614, PA1012 / PA612, PA1012 / PA1010, and PA1012 / PA1212.

[0010] Furthermore, the plasticizer is selected from at least one of aliphatic plasticizers, ester plasticizers, polyol plasticizers, and epoxy plasticizers.

[0011] Furthermore, the vulcanizing agent is selected from at least one of sulfur, peroxide vulcanizing agents, resin vulcanizing agents, thiuram vulcanizing agents, and polyvalent metal oxide vulcanizing agents.

[0012] Furthermore, the compatibilizer is selected from at least one of N,N'-(4,4'-methylenediphenyl)bismaleimide, N,N'-(1,3-phenylene)bismaleimide, and 2,2'-bis[4-(4-maleimide-phenoxy)phenyl]propane.

[0013] Furthermore, the antioxidant is selected from at least one of hindered phenolic antioxidants, amine antioxidants, phosphite antioxidants, and thioester antioxidants; the reinforcing agent is selected from at least one of zinc oxide, calcium carbonate, talc, wollastonite, kaolin, silica, carbon black, and barium sulfate.

[0014] Furthermore, the light stabilizer is selected from at least one of salicylates, benzotriazoles, triazines / organic complexes, benzophenones, and substituted acrylonitrile light stabilizers.

[0015] Furthermore, the color masterbatch is selected from at least one of PA color masterbatch, PE color masterbatch, and PP color masterbatch.

[0016] A second object of the present invention is to provide a method for preparing the aforementioned thermoplastic TPV elastomer composition, comprising the following steps: S1: Mix nitrile rubber, plasticizer, vulcanizing agent, compatibilizer, reinforcing agent and some antioxidants, and then plasticize and mix them through a two-roll mill to obtain a compound. Cut the compound into pellets to obtain nitrile rubber compound masterbatch. S2: The nitrile rubber compound masterbatch, long carbon chain nylon, remaining antioxidant, light stabilizer, and color masterbatch are added to a twin-screw extruder, and after plasticizing, dynamic vulcanization, extrusion, pelletizing, and drying, the thermoplastic TPV elastomer composition is obtained.

[0017] Preferably, a reinforcing agent is also added in step S2.

[0018] Preferably, the reinforcing agent added in step S2 is talc.

[0019] Talc is used as a reinforcing filler; adding it in an appropriate proportion can reduce costs and improve hardness and strength. However, adding too much talc will significantly degrade the elongation at break of the material.

[0020] Further, in step S1, the roller temperature of the twin-roll open mill is 35-50℃, and the roller spacing is 0.5-4mm; in step S2, the temperature of the feeding section of the twin-screw extruder is 50-90℃, the temperature of the solid conveying section is 160-200℃, the temperature of the melt plasticizing section is 200-240℃, the temperature of the melt conveying section is 180-220℃, and the die temperature is 190-240℃; the screw speed is 100~400r / min.

[0021] A third objective of this invention is to provide a new energy vehicle cable comprising any of the thermoplastic TPV elastomer compositions described in the invention, or a thermoplastic TPV elastomer composition prepared by the invention method described above.

[0022] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention uses nitrile rubber compound masterbatch and long-chain nylon to prepare TPV elastomer through twin-screw dynamic vulcanization. Due to the pre-mixing of the vulcanizing agent and the rubber phase, the vulcanizing agent is more uniformly dispersed in the rubber phase, resulting in a higher degree of crosslinking of the obtained rubber phase, while maintaining good processing performance of the composition.

[0023] 2. This invention uses a small molecule containing a bifunctional bismaleimide group as a compatibilizer, which can form a vulcanized structure with nitrile rubber and chemically bond with long-chain nylon, compatibilizing the plastic phase and the rubber phase, and synergistically improving the temperature resistance and mechanical properties of long-chain nylon materials.

[0024] 3. The thermoplastic nitrile rubber / long-chain nylon TPV elastomer composition prepared by this invention meets the application requirements of insulation materials for cables in new energy vehicles with a temperature resistance of 125℃. Detailed Implementation

[0025] To facilitate understanding of the present invention, a more comprehensive description will be given below with reference to specific embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the present invention.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0027] The specific information on the raw materials used in the following examples and comparative examples is shown in Table 1:

[0028] All materials are commercially available conventional products. The above raw materials and reagents are only examples of some specific embodiments of the present invention and do not mean that the present invention can only use the above reagents. The specific scope shall be subject to the claims.

[0029] It is understood that the above-mentioned raw materials and reagents are merely examples of some specific embodiments of the present invention, making the technical solution of the present invention clearer, and do not mean that the present invention can only use the above-mentioned reagents. The specific scope shall be determined by the claims. In addition, unless otherwise specified, "parts" in the examples and comparative examples refer to parts by weight.

[0030] Any range described in this invention includes the endpoint, any value between the endpoints, and any subrange consisting of the endpoint or any value between the endpoints.

[0031] The examples and comparative examples were prepared using the following methods, and the formulations are listed in Table 2: Example 1 S1. Weigh 60 parts NBR3304, 0.3 parts 1098, 0.3 parts 168, 3 parts DOS, 1.5 parts BIPB, 2 parts BDM, and 1.5 parts zinc oxide. Plasticize and mix these components using a two-roll mill to obtain a compound. Cut the compound into pellets to obtain nitrile rubber compound masterbatch. The two-roll mill temperature is 40℃, the roll gap is 2mm, and the mixing time is 15min.

[0032] S2. Weigh 68.6 parts of nitrile rubber compound masterbatch, 40 parts of PA1012, 0.3 parts of 1098, 0.3 parts of 168, 0.3 parts of UV-1164, and 1 part of PA color masterbatch and add them to a twin-screw extruder. After plasticizing, dynamic vulcanization, extrusion, pelletizing, and drying, a thermoplastic TPV elastomer composition is obtained. The twin-screw extruder has the following temperatures: feeding section temperature 80℃, solid conveying section temperature 180℃, melt plasticizing section temperature 220℃, melt conveying section temperature 200℃, and die temperature 220℃; the screw speed is 350 r / min.

[0033] Example 2 S1. Weigh out 55 parts NBR2907, 0.3 parts 1098, 0.3 parts 168, 5 parts DOS, 1 part BIPB, 3 parts BDM, and 1.5 parts zinc oxide. Plasticize and mix the mixture using a two-roll mill to obtain a compound. Cut the compound into pellets to obtain nitrile rubber compound masterbatch. The two-roll mill temperature is 35℃, the roll gap is 2mm, and the mixing time is 15min.

[0034] S2. Weigh 66.1 parts of nitrile rubber compound masterbatch, 45 parts of PA612 / PA614, 0.3 parts of 1098, and 0.3 parts of 168 and add them to a twin-screw extruder. After plasticizing, dynamic vulcanization, extrusion, pelletizing, and drying, a thermoplastic TPV elastomer composition is obtained. The twin-screw extruder has the following temperatures: feeding section temperature 80℃, solid conveying section temperature 180℃, melt plasticizing section temperature 220℃, melt conveying section temperature 200℃, and die temperature 220℃; the screw speed is 300 r / min.

[0035] Example 3 S1. Weigh 50 parts NBR4005, 0.2 parts 1098, 0.2 parts 168, 4 parts DOS, 0.5 parts BIPB, 3.5 parts BDM, and 1.5 parts zinc oxide. Plasticize and mix these components using a two-roll mill to obtain a compound. Cut the compound into pellets to obtain nitrile rubber compound masterbatch. The two-roll mill temperature is 40℃, the roll gap is 1.5mm, and the mixing time is 15min.

[0036] S2. Weigh 59.9 parts of nitrile rubber compound masterbatch, 50 parts of PA612, 0.3 parts of 1098, 0.3 parts of 168, 5 parts of talc, 0.3 parts of UV-1164, and 2 parts of PA color masterbatch and add them to a twin-screw extruder. After plasticizing, dynamic vulcanization, extrusion, pelletizing, and drying, a thermoplastic TPV elastomer composition is obtained. The temperature of the twin-screw extruder is 90℃ in the feeding section, 200℃ in the solid conveying section, 230℃ in the melt plasticizing section, 215℃ in the melt conveying section, and 230℃ at the die; the screw speed is 300 r / min.

[0037] Example 4 S1. Weigh 70 parts N240S, 0.5 parts 1098, 0.5 parts 168, 6 parts DOS, 2 parts BIPB, 1 part BDM, and 1.5 parts zinc oxide. Plasticize and mix these components using a two-roll mill to obtain a compound. Cut the compound into pellets to obtain nitrile rubber compound masterbatch. The two-roll mill temperature is 40℃, the roll gap is 1.5mm, and the mixing time is 15min.

[0038] S2. Weigh 81.5 parts of nitrile rubber compound masterbatch, 30 parts of PA12, 0.5 parts of 1098, 0.5 parts of 168, 1 part of UV-1164, and 1 part of PA color masterbatch and add them to a twin-screw extruder. After plasticizing, dynamic vulcanization, extrusion, pelletizing, and drying, a thermoplastic TPV elastomer composition is obtained. The twin-screw extruder has the following temperatures: feeding section temperature 60℃, solid conveying section temperature 170℃, melt plasticizing section temperature 210℃, melt conveying section temperature 180℃, and die temperature 200℃; screw speed 250 r / min.

[0039] Example 5 S1. Weigh 70 parts N240S, 0.5 parts 1098, 0.5 parts 168, 6 parts DOS, 2 parts BIPB, 1 part BDM, and 1.5 parts zinc oxide. Plasticize and mix these components using a two-roll mill to obtain a compound. Cut the compound into pellets to obtain nitrile rubber compound masterbatch. The two-roll mill temperature is 40℃, the roll gap is 1.5mm, and the mixing time is 15min.

[0040] S2. Weigh 81.5 parts of nitrile rubber compound masterbatch, 30 parts of PA12, 0.5 parts of 1098, 0.5 parts of 168, 15 parts of talc, 1 part of UV-1164, and 1 part of PA color masterbatch and add them to a twin-screw extruder. After plasticizing, dynamic vulcanization, extrusion, pelletizing, and drying, a thermoplastic TPV elastomer composition is obtained. The temperature of the twin-screw extruder is 60℃ in the feeding section, 170℃ in the solid conveying section, 215℃ in the melt plasticizing section, 185℃ in the melt conveying section, and 215℃ at the die; the screw speed is 250 r / min.

[0041] Comparative Example 1 Except for the melt index of PA1012 resin being 2 g / 10 min (235℃ / 2.16 kg), everything else is the same as in Example 1.

[0042] Comparative Example 2 Except for the melt index of PA1012 resin being 40 g / 10 min (235℃ / 2.16 kg), everything else is the same as in Example 1.

[0043] Comparative Example 3 In addition to the nitrile rubber having an acrylonitrile content of 35% and a Mooney viscosity M L 100℃ (1+4) is 32, and the rest are the same as in Example 1.

[0044] Comparative Example 4 In addition to the nitrile rubber having an acrylonitrile content of 41% and a Mooney viscosity M L 100℃ (1+4) is 80, and the rest are the same as in Example 1.

[0045] Comparative Example 5 Except for the acrylonitrile content in the nitrile rubber being 19% and the Mooney viscosity ML100℃(1+4) being 63, everything else is consistent with Example 1.

[0046] Comparative Example 6 Except for the acrylonitrile content in the nitrile rubber being 48% and the Mooney viscosity ML100℃(1+4) being 45, everything else is consistent with Example 1.

[0047] Comparative Example 7 Except for the amount of BIPB vulcanizing agent, which was changed from 1.5 parts to 0.3 parts, everything else was the same as in Example 1.

[0048] Comparative Example 8 Except for the amount of BIPB vulcanizing agent, which was changed from 1.5 parts to 3 parts, everything else was the same as in Example 1.

[0049] Comparative Example 9 Except for the absence of the compatibilizer BDM, everything else is the same as in Example 1.

[0050] Comparative Example 10 Except for the amount of compatibilizer BDM being changed from 2 parts to 4 parts, everything else is the same as in Example 1.

[0051] Comparative Example 11 60 parts NBR3304, 0.6 parts 1098, 0.6 parts 168, 3 parts DOS, 1.5 parts BIPB, 2 parts BDM, 1.5 parts zinc oxide, 40 parts PA1012, 0.3 parts UV-1164, and 1 part PA masterbatch were weighed and added to a twin-screw extruder. After plasticizing, dynamic vulcanization, extrusion, pelletizing, and drying, a thermoplastic TPV elastomer composition was obtained. The twin-screw extruder had the following temperatures: feeding section temperature 80℃, solid conveying section temperature 180℃, melt plasticizing section temperature 220℃, melt conveying section temperature 200℃, and die temperature 220℃; the screw speed was 350 r / min.

[0052] Table 2

[0053] After homogenization treatment of the thermoplastic TPV elastomer compositions prepared in the above examples, injection-molded specimens were subjected to performance tests. The test items and results are listed in Table 3: Table 3

[0054] The specific test standards for the test items in Table 3 are as follows: The Shore A hardness test standard refers to GB / T 6031-2017, the tensile property test standard refers to GB / T 528-2009, the volume resistivity test standard refers to GB / T 1410-2006, the heat aging test requires the sample to be placed in an air heat aging chamber at 158℃ for 168 hours before testing, and the volume swelling ratio test standard refers to SH / T 1159-1992. The swelling ratio of the mixture is calculated by formula (1):

[0055] In the formula: S The swelling ratio of the composition. m a The mass of the composition after swelling. m b The mass of the composition after swelling and drying. c b The density of the composition after swelling and drying is given. c τ The density of cyclohexane is given by the degree of sulfidation. The higher the degree of sulfidation, the smaller the swelling ratio S, and the larger its reciprocal 1 / S.

[0056] According to the test results in Table 3, the thermoplastic TPV elastomer compositions of Examples 1-5 of this invention exhibit good mechanical properties (tensile strength > 25.2 MPa, elongation at break > 215%) and insulation properties (volume resistivity > 10). 12 (Ω·cm) and heat resistance (tensile strength after aging at 158℃ / 168h > 22.8MPa, elongation at break > 200%, volume resistivity > 10 ...). 12 (Ω·cm). The thermoplastic TPV elastomer composition prepared by this invention has good mechanical properties, insulation properties, temperature resistance properties and processing properties, meeting the application requirements of insulation materials for cables with a temperature resistance of 125℃ in new energy vehicles.

[0057] A comprehensive comparison of Example 1 and Comparative Examples 1-2 shows that if the melt index of long-chain nylon is too small, the material is difficult to extrude; if the melt index of nylon is too large, the extrusion stability is poor, and it is easy to cause uneven thickness of the extruded coating layer.

[0058] The test results from Example 1 and Comparative Examples 3 and 4 show that the Mooney viscosity of nitrile rubber has a significant impact on the processing and mechanical properties of the material. Comparative Example 3 used nitrile rubber with low Mooney viscosity, which exhibited significant sticking to the rollers during mixing, and its vulcanized product had a low tensile strength (21.2 MPa), indicating that low Mooney viscosity (low molecular weight) is not conducive to the formation of a high-strength crosslinking network. Comparative Example 4 used nitrile rubber with high Mooney viscosity. Although its acrylonitrile content was high, the excessively high Mooney viscosity led to poor dispersion uniformity of the rubber compound in the nylon matrix, affecting the final mechanical properties (tensile strength 22.4 MPa). In summary, controlling the Mooney viscosity within the range of 42-76 is beneficial for balancing mixing processability and vulcanization strength.

[0059] The test results from Example 1 and Comparative Examples 5 and 6 show that the acrylonitrile content in nitrile rubber plays a decisive role in the material's heat resistance and elasticity. Comparative Example 5 used nitrile rubber with a low acrylonitrile content, and its tensile strength retention and elongation at break retention after aging both decreased significantly. This is because the lower polarity weakens the bonding force with other components in the system, leading to deterioration in heat aging resistance. Comparative Example 6 used nitrile rubber with a high acrylonitrile content, which had excessive polarity, reduced molecular chain flexibility, resulting in poor material elasticity (elongation at break of 240%) and increased difficulty in plasticizing. Therefore, controlling the acrylonitrile content within the range of 26%-42% can maintain good elasticity and processability while ensuring heat resistance.

[0060] A comprehensive comparison of Example 1 and Comparative Examples 7-8 shows that when the vulcanizing agent content is too low, the reciprocal of the volume swelling ratio of the composition is 0.17, indicating that the degree of vulcanization of nitrile rubber is insufficient and the mechanical properties of the composition are poor. When the vulcanizing agent content is too high, the rubber phase of the composition becomes more difficult to break during dynamic vulcanization, the particle size of nitrile rubber increases, and the elongation at break of the composition decreases (the elongation at break is 250%).

[0061] A comprehensive comparison of Example 1 and Comparative Examples 9-10 shows that the appropriate addition of compatibilizer synergistically improves the mechanical properties and heat resistance of the composition. This is mainly because the unsaturated double bonds in the compatibilizer can form a vulcanized structure with nitrile rubber, and the activated anhydride can chemically bond with the amino groups of nylon. In Comparative Example 10, the amount of compatibilizer was further increased, and its elongation at break and elongation at break after aging decreased compared with Example 1, indicating that the amount of compatibilizer needs to be controlled within a reasonable range to balance the strength and toughness of the material.

[0062] A comprehensive comparison of Example 1 and Comparative Example 11 shows that when nitrile rubber compound masterbatch is used to prepare TPV elastomer by twin-screw dynamic vulcanization with long carbon chain nylon, the vulcanizing agent is more evenly dispersed in the rubber phase due to the premixing of the vulcanizing agent and the rubber phase, resulting in a higher degree of crosslinking of the obtained rubber phase, while maintaining good processing performance of the composition.

[0063] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0064] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A thermoplastic TPV elastomer composition, characterized in that, It is prepared from the following raw materials in parts by weight: 50-70 parts of nitrile rubber, 30-50 parts of long-chain carbon nylon 3-6 parts plasticizer Vulcanizing agent 0.5-2 parts, Compatibilizer 1-3.5 parts, Antioxidant 0.2-3 parts, Reinforcing agent 1.5-16.5 parts, 0-1 part light stabilizer 0-2 parts of color masterbatch; Wherein, the Mooney viscosity M of the nitrile rubber L The temperature at 100℃ (1+4) is 42-76, and the acrylonitrile content is 26%-42%; the melt flow rate of the long carbon chain nylon at 235℃ / 2.16kg is 5-30g / 10min.

2. The thermoplastic TPV elastomer composition according to claim 1, characterized in that, The long-chain nylon is selected from at least one of PA610, PA612, PA613, PA614, PA615, PA1010, PA1012, PA1013, PA1014, PA1015, PA11, PA12, PA1212, PA1213, PA1214, PA1215, PA610 / PA66, PA612 / PA66, PA612 / PA610, PA612 / PA614, PA1012 / PA612, PA1012 / PA1010, and PA1012 / PA1212.

3. The thermoplastic TPV elastomer composition according to claim 1, characterized in that, The plasticizer is selected from at least one of aliphatic plasticizers, ester plasticizers, polyol plasticizers, and epoxy plasticizers.

4. The thermoplastic TPV elastomer composition according to claim 1, characterized in that, The vulcanizing agent is selected from at least one of sulfur, peroxide vulcanizing agents, resin vulcanizing agents, thiuram vulcanizing agents, and polyvalent metal oxide vulcanizing agents.

5. The thermoplastic TPV elastomer composition according to claim 1, characterized in that, The compatibilizer is selected from at least one of N,N'-(4,4'-methylenediphenyl)bismaleimide, N,N'-(1,3-phenylene)bismaleimide, and 2,2'-bis[4-(4-maleimide-phenoxy)phenyl]propane.

6. The thermoplastic TPV elastomer composition according to claim 1, characterized in that, The antioxidant is selected from at least one of hindered phenolic antioxidants, amine antioxidants, phosphite antioxidants, and thioester antioxidants; the reinforcing agent is selected from at least one of zinc oxide, calcium carbonate, talc, wollastonite, kaolin, silica, carbon black, and barium sulfate.

7. The thermoplastic TPV elastomer composition according to claim 1, characterized in that, The light stabilizer is selected from at least one of salicylate light stabilizers, benzotriazole light stabilizers, triazine / organic complex light stabilizers, benzophenones, and substituted acrylonitrile light stabilizers; the color masterbatch is selected from at least one of PA color masterbatch, PE color masterbatch, and PP color masterbatch.

8. The method for preparing the thermoplastic TPV elastomer composition according to any one of claims 1-7, characterized in that, Includes the following steps: S1: Mix nitrile rubber, plasticizer, vulcanizing agent, compatibilizer, reinforcing agent and some antioxidants, and then plasticize and mix them through a two-roll mill to obtain a compound. Cut the compound into pellets to obtain nitrile rubber compound masterbatch. S2: The nitrile rubber compound masterbatch, long carbon chain nylon, remaining antioxidant, light stabilizer, and color masterbatch are added to a twin-screw extruder, and after plasticizing, dynamic vulcanization, extrusion, pelletizing, and drying, the thermoplastic TPV elastomer composition is obtained.

9. The method for preparing the thermoplastic TPV elastomer composition according to claim 8, characterized in that, In step S1, the roller temperature of the twin-roll open mill is 35-50℃, and the roller spacing is 0.5-4mm; in step S2, the temperature of the feeding section of the twin-screw extruder is 50-90℃, the temperature of the solid conveying section is 160-200℃, the temperature of the melt plasticizing section is 200-240℃, the temperature of the melt conveying section is 180-220℃, and the die temperature is 190-240℃; the screw speed is 100~400r / min.

10. A new energy vehicle cable, characterized in that, The new energy vehicle cable comprises the thermoplastic TPV elastomer composition according to any one of claims 1-7, or the thermoplastic TPV elastomer composition prepared by the preparation method according to claim 8 or 9.

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