TPE material, preparation method and application thereof

Abstract

The application discloses a TPE material and a preparation method and application thereof, and belongs to the technical field of thermoplastic elastomer polymer materials. The TPE material is prepared by taking polyether block amide as an antistatic agent; nylon, maleic anhydride grafted polypropylene, maleic anhydride grafted ethylene-propylene-diene rubber, maleic anhydride grafted hydrogenated styrene elastomer and polyacrylamide are added to improve the strength of the material and the bonding performance with PA. The TPE material has good nylon encapsulation performance, antistatic performance and mechanical performance, and is suitable for application in battery package shell encapsulation, explosion-proof tool shell encapsulation and vehicle part encapsulation.

Description

Technical Field

[0001] This application relates to the field of thermoplastic elastomer polymer materials technology, specifically to a TPE material and its preparation method and application. Background Technology

[0002] Thermoplastic elastomers (TPEs) combine the processability of thermoplastics (ease of processing) with the physical properties of vulcanized rubber, such as high elasticity, high strength, and high resilience. A key application of TPEs is as overcoating materials, where soft TPE material is coated onto other materials. However, permanently antistatic TPEs are difficult to overcoat onto nylon (PA, polyamide). This is partly because PA is highly polar, while permanently antistatic TPEs, primarily composed of SEBS, white oil, PP, and POE, are less polar, resulting in a significant difference in polarity. Furthermore, the inherent antistatic properties of permanently antistatic TPEs themselves make bonding difficult.

[0003] Therefore, it is necessary to develop a permanent antistatic TPE material with good nylon overmolding performance and mechanical properties. Summary of the Invention

[0004] Based on the deficiencies of the existing technology, the purpose of this application is to provide a TPE material, its preparation method and application, which aims to enable the TPE material to simultaneously possess good antistatic properties, nylon overmolding properties and mechanical properties.

[0005] To achieve the above objectives, in a first aspect, this application provides a TPE material comprising the following components in parts by weight:

[0006] 8-32 parts of hydrogenated styrene elastomer,

[0007] 20-60 parts mineral oil

[0008] 1-15 parts nylon

[0009] 1-10 parts of glycidyl methacrylate grafted olefin copolymer elastomer

[0010] 1-20 parts of maleic anhydride-grafted polypropylene

[0011] 3-20 parts of maleic anhydride-grafted EPDM rubber

[0012] 1-20 parts of maleic anhydride-grafted hydrogenated styrene elastomer

[0013] 8-12 parts of polyether block amide,

[0014] 1-5 parts of polyacrylamide

[0015] 5-50 parts of filler.

[0016] Polyether block amides possess ion channels, which impart antistatic properties to TPE materials. The amide groups in nylon have high strength, significantly enhancing the material's strength and toughness. Furthermore, being of the same material as the nylon to be coated, they can significantly improve the overcoating performance on PA. Maleic anhydride in maleic anhydride-grafted polypropylene, maleic anhydride-grafted EPDM rubber, and maleic anhydride-grafted hydrogenated styrene elastomers can react with the amide groups of nylon, improving the adhesion of the material to nylon. The addition of maleic anhydride-grafted polypropylene can also regulate the material's hardness, preventing it from becoming too rigid. The addition of maleic anhydride-grafted hydrogenated styrene elastomers increases the content of hydrogenated styrene elastomers in the material, resulting in increased overall tensile strength. Compared to maleic anhydride-grafted polypropylene and maleic anhydride-grafted hydrogenated styrene elastomers, the maleic anhydride in maleic anhydride-grafted EPDM rubber is more readily utilized, further enhancing the adhesion strength between the material and nylon. The addition of glycidyl methacrylate-grafted olefin copolymer elastomers can, on the one hand, promote the compatibility of polyether block amides with hydrogenated styrene elastomers, establish better ion channels, and improve antistatic properties; on the other hand, it can enhance the activity of maleic anhydride grafts, promoting adhesion between the material and nylon. Polyacrylamide is beneficial for improving the compatibility of nylon with other components in the material and increasing the material's strength.

[0017] Under the combined effect of the above-mentioned specific amounts of each component, the TPE material can not only be well coated onto PA with strong adhesion, but also has good antistatic properties and good mechanical properties, such as high tensile strength.

[0018] The hydrogenated styrene elastomer is 8 to 32 parts by weight, such as 8 parts by weight, 10 parts by weight, 12 parts by weight, 14 parts by weight, 16 parts by weight, 18 parts by weight, 20 parts by weight, 22 parts by weight, 24 parts by weight, 26 parts by weight, 28 parts by weight, 30 parts by weight, 32 parts by weight, or any two of the above values.

[0019] The mineral oil is 20 to 60 parts by weight, such as 20 parts by weight, 25 parts by weight, 30 parts by weight, 35 parts by weight, 40 parts by weight, 45 parts by weight, 50 parts by weight, 55 parts by weight, 60 parts by weight, or any two of the above values.

[0020] The nylon is 1 to 15 parts by weight, such as 1 part by weight, 3 parts by weight, 5 parts by weight, 7 parts by weight, 10 parts by weight, 12 parts by weight, 15 parts by weight, or any two of the above values.

[0021] The glycidyl methacrylate grafted olefin copolymer elastomer is 1 to 10 parts by weight, such as 1 part by weight, 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight, 10 parts by weight, or any two of the above values.

[0022] The maleic anhydride-grafted polypropylene is 1 to 20 parts by weight, such as 1 part by weight, 3 parts by weight, 5 parts by weight, 7 parts by weight, 10 parts by weight, 12 parts by weight, 15 parts by weight, 17 parts by weight, 20 parts by weight, or any two of the above values.

[0023] The maleic anhydride-grafted EPDM rubber is 3 to 20 parts by weight, such as 3 parts by weight, 5 parts by weight, 7 parts by weight, 10 parts by weight, 12 parts by weight, 15 parts by weight, 17 parts by weight, 20 parts by weight, or any two of the above values.

[0024] The maleic anhydride-grafted hydrogenated styrene elastomer is 1 to 20 parts by weight, such as 1 part by weight, 3 parts by weight, 5 parts by weight, 7 parts by weight, 10 parts by weight, 12 parts by weight, 15 parts by weight, 17 parts by weight, 20 parts by weight, or any two of the above values.

[0025] The polyether block amide is present in an amount of 8 to 12 parts by weight, such as 8 parts by weight, 8.5 parts by weight, 9 parts by weight, 9.5 parts by weight, 10 parts by weight, 10.5 parts by weight, 11 parts by weight, 11.5 parts by weight, 12 parts by weight, or any two of the above values. Preferably, the polyether block amide is present in an amount of 8.8 to 11.2 parts by weight to better balance the material's adhesion and antistatic properties on PA.

[0026] The polyacrylamide is 1 to 5 parts by weight, such as 1 part by weight, 1.5 parts by weight, 2 parts by weight, 2.5 parts by weight, 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, or any two of the above values.

[0027] The filler is 5 to 50 parts by weight, such as 5 parts by weight, 10 parts by weight, 15 parts by weight, 20 parts by weight, 25 parts by weight, 30 parts by weight, 35 parts by weight, 40 parts by weight, 45 parts by weight, 50 parts by weight, or any two of the above values.

[0028] Preferably, the weight ratio of nylon to polyacrylamide is (0.5~10):1, such as 0.5:1, 0.8:1, 1:1, 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, 10:1, or any two of the above values ​​forming a range. More preferably, the weight ratio of nylon to polyacrylamide is (1.3~3):1.

[0029] When the weight ratio of nylon to polyacrylamide is in the range of (0.5~10):1, especially in the range of (1.3~3):1, the nylon overmolding performance and antistatic properties of the material are better.

[0030] Preferably, the hydrogenated styrene elastomer includes at least one of hydrogenated styrene-butadiene block copolymer and hydrogenated styrene-isoprene block copolymer.

[0031] Preferably, the hydrogenated styrene elastomer contains 60 wt.% to 80 wt.% rubber and 20 wt.% to 40 wt.% styrene. For example, the rubber content in the hydrogenated styrene elastomer is within the range formed by any two of the following values: 60 wt.%, 62 wt.%, 64 wt.%, 66 wt.%, 68 wt.%, 70 wt.%, 72 wt.%, 74 wt.%, 76 wt.%, 78 wt.%, 80 wt.%, or higher; and the styrene content is within the range formed by any two of the following values: 20 wt.%, 22 wt.%, 24 wt.%, 26 wt.%, 28 wt.%, 30 wt.%, 32 wt.%, 34 wt.%, 36 wt.%, 38 wt.%, 40 wt.%, or higher. The rubber and styrene contents in the hydrogenated styrene elastomer can be detected by proton nuclear magnetic resonance spectroscopy.

[0032] Preferably, the relative viscosity of the hydrogenated styrene elastomer at 10 wt% content in a toluene solution at 25°C is 1500-3000. For example, the relative viscosity of the hydrogenated styrene elastomer at 10 wt% content in a toluene solution at 25°C is within the range of any two of the following values: 1500, 1700, 2000, 2200, 2500, 2800, 3000, or more. The relative viscosity of the hydrogenated styrene elastomer is measured using a kinematic viscosity test.

[0033] Preferably, the mineral oil includes at least one of silicone oil, paraffin oil, cycloalkane oil, and aromatic oil.

[0034] Preferably, the viscosity of the nylon is 90-180 cm³ / g. For example, the viscosity of the nylon is 90 cm³ / g, 100 cm³ / g, 110 cm³ / g, 120 cm³ / g, 130 cm³ / g, 140 cm³ / g, 150 cm³ / g, 160 cm³ / g, 170 cm³ / g, 180 cm³ / g, or any two of the above values. The viscosity of the nylon is measured according to ISO 307:2019.

[0035] Preferably, the nylon comprises nylon 6.

[0036] Preferably, the grafting rate of the glycidyl methacrylate-grafted olefin copolymer elastomer in the glycidyl methacrylate-grafted olefin copolymer elastomer is 0.5 wt.% to 3 wt.%. For example, the grafting rate of the glycidyl methacrylate-grafted olefin copolymer elastomer in the glycidyl methacrylate-grafted olefin copolymer elastomer is within the range of any two of the following values: 0.5 wt.%, 0.7 wt.%, 1 wt.%, 1.2 wt.%, 1.4 wt.%, 1.6 wt.%, 1.8 wt.%, 2 wt.%, 2.2 wt.%, 2.4 wt.%, 2.6 wt.%, 2.8 wt.%, 3 wt.%. This grafting rate can be determined by titration.

[0037] Preferably, the melt flow rate of the glycidyl methacrylate grafted olefin copolymer elastomer at 190°C and 2.16 kg is 2.0~5.0 g / 10 min. For example, the melt flow rate of the glycidyl methacrylate grafted olefin copolymer elastomer at 190°C and 2.16 kg is 2.0 g / 10 min, 2.5 g / 10 min, 3.0 g / 10 min, 3.5 g / 10 min, 4.0 g / 10 min, 4.5 g / 10 min, 5.0 g / 10 min, or any two of the above values. This melt flow rate is measured according to ASTM D1238-2010.

[0038] Preferably, the glycidyl methacrylate-grafted olefin copolymer elastomer comprises glycidyl methacrylate-grafted POE.

[0039] Preferably, the maleic anhydride-grafted polypropylene includes at least one of maleic anhydride-grafted homopolymer polypropylene, maleic anhydride-grafted copolymer polypropylene, and maleic anhydride-grafted random copolymer polypropylene.

[0040] Preferably, the maleic anhydride grafting rate in the maleic anhydride-grafted polypropylene is ≥0.8 wt.%. For example, the maleic anhydride grafting rate in the maleic anhydride-grafted polypropylene is 0.8 wt.%, 0.9 wt.%, 1.0 wt.%, 1.1 wt.%, 1.2 wt.%, 1.3 wt.%, 1.4 wt.%, or 1.5 wt.%, etc. This grafting rate can be determined by titration.

[0041] Preferably, the melt flow rate of the maleic anhydride-grafted polypropylene at 190°C and 0.325 kg is 5-30 g / 10 min. For example, the melt flow rate of the maleic anhydride-grafted polypropylene at 190°C and 0.325 kg is 5 g / 10 min, 7 g / 10 min, 10 g / 10 min, 12 g / 10 min, 15 g / 10 min, 17 g / 10 min, 20 g / 10 min, 22 g / 10 min, 25 g / 10 min, 27 g / 10 min, 30 g / 10 min, or any two of the above values. This melt flow rate is measured according to ASTM D1238-2010.

[0042] Preferably, the maleic anhydride grafting rate in the maleic anhydride-grafted EPDM rubber is ≥0.8 wt.%. For example, the maleic anhydride grafting rate in the maleic anhydride-grafted polypropylene is 0.8 wt.%, 0.9 wt.%, 1.0 wt.%, 1.1 wt.%, 1.2 wt.%, 1.3 wt.%, 1.4 wt.%, or 1.5 wt.%, etc. This grafting rate can be determined by titration.

[0043] Preferably, the melt flow rate of the maleic anhydride-grafted EPDM rubber at 190°C and 2.16 kg is 0.1~1.8 g / 10 min. For example, the melt flow rate of the maleic anhydride-grafted EPDM rubber at 190°C and 2.16 kg is 0.1 g / 10 min, 0.3 g / 10 min, 0.5 g / 10 min, 0.7 g / 10 min, 1 g / 10 min, 1.2 g / 10 min, 1.5 g / 10 min, 1.8 g / 10 min, or any two of the above values. This melt flow rate is measured according to ASTM D1238-2010.

[0044] Preferably, the maleic anhydride-grafted hydrogenated styrene elastomer includes at least one of maleic anhydride-grafted hydrogenated styrene-butadiene block copolymer and maleic anhydride-grafted hydrogenated styrene-isoprene block copolymer.

[0045] Preferably, the maleic anhydride grafting rate in the maleic anhydride-grafted hydrogenated styrene elastomer is ≥1.7 wt.%. For example, the maleic anhydride grafting rate in the maleic anhydride-grafted polypropylene is 1.7 wt.%, 1.8 wt.%, 1.9 wt.%, 2.0 wt.%, 2.1 wt.%, 2.2 wt.%, 2.3 wt.%, 2.4 wt.%, or 2.5 wt.%, etc. This grafting rate can be determined by titration.

[0046] Preferably, the melt flow rate of the maleic anhydride-grafted hydrogenated styrene elastomer at 230°C and 5 kg is 5~40 g / 10 min. For example, the melt flow rate of the maleic anhydride-grafted hydrogenated styrene elastomer at 230°C and 5 kg is 5 g / 10 min, 10 g / 10 min, 15 g / 10 min, 20 g / 10 min, 25 g / 10 min, 30 g / 10 min, 35 g / 10 min, 40 g / 10 min, or any two of the above values. This melt flow rate is measured according to ASTM D1238-2010.

[0047] Preferably, the weight ratio of styrene to rubber in the maleic anhydride-grafted hydrogenated styrene elastomer is 2 / 8 to 4 / 6. For example, the weight ratio of styrene to rubber in the maleic anhydride-grafted hydrogenated styrene elastomer is within the range formed by any two of the following values: 2 / 8, 3 / 7, 4 / 6, or more. This weight ratio can be obtained by detection using 1H NMR spectroscopy.

[0048] Preferably, the polyether block amide comprises polyamide-polydiol, such as polyamide 12-polybutanediol.

[0049] Preferably, the polyether block amide has a melting point of 160-190°C. For example, the melting point of the polyether block amide is a range formed by any two of the following values: 160°C, 165°C, 170°C, 175°C, 180°C, 185°C, 190°C, or above. This melting point is measured according to ISO 11357-1-2016.

[0050] Preferably, the weight-average molecular weight of the polyacrylamide is between 1 million and 8 million. For example, the weight-average molecular weight of the polyacrylamide is within the range formed by any two of the following values: 1 million, 2 million, 3 million, 4 million, 5 million, 6 million, 7 million, 8 million, or higher. This weight-average molecular weight can be determined by gel permeation chromatography.

[0051] Preferably, the filler comprises at least one selected from silica, wollastonite, calcium carbonate, glass microspheres, talc, kaolin, diatomaceous earth, barium sulfate, and mica. Preferably, the calcium carbonate is heavy calcium carbonate.

[0052] Preferably, the particle size of the filler is 100-4000 mesh. For example, the particle size of the filler is within the range of any two values ​​of 100 mesh, 500 mesh, 1000 mesh, 1500 mesh, 2000 mesh, 2500 mesh, 3000 mesh, 3500 mesh, 4000 mesh, or above. This particle size can be measured by sieve method.

[0053] Preferably, the TPE material further includes the following components in parts by weight: 0.1 to 2 parts of additives.

[0054] Preferably, the additives include at least one of antioxidants, light stabilizers, and lubricants.

[0055] Preferably, the antioxidant includes at least one selected from 2,6-di-tert-butyl-4-methylphenol, antioxidant 1010, antioxidant 1076, antioxidant 1790, antioxidant 168, and antioxidant 626.

[0056] Preferably, the light stabilizer includes hindered amine light stabilizers and triazine light stabilizers, and the weight ratio of the hindered amine light stabilizer to the triazine light stabilizer is (0.1-0.5):1.

[0057] Preferably, the hindered amine light stabilizer includes at least one of light stabilizer 622, light stabilizer 770, light stabilizer 944, light stabilizer 783, light stabilizer 791, light stabilizer 3853, light stabilizer 292 and light stabilizer 123; the triazine light stabilizer includes at least one of UV 329, UV-234, UV-236 and UV-2373.

[0058] Preferably, the lubricant comprises at least one of vinyl bis-stearamide, hydroxy fatty acid lubricant, erucamide, zinc stearate, magnesium stearate, and polyethylene wax.

[0059] Preferably, the mass fraction of hydrogenated styrene elastomer in the TPE material is 10% or more, such as 10%, 12%, 14%, 16%, 18%, 20%, or any range formed by any two of the above values.

[0060] The TPE material described in this application may contain commonly used additives such as colorants without compromising the effectiveness of this application.

[0061] Secondly, this application provides a method for preparing the TPE material, comprising the following steps:

[0062] Mineral oil was sprayed onto the hydrogenated styrene elastomer while stirring to obtain a premix.

[0063] The premixed material is mixed with other raw materials, melt-extruded, granulated, and dried to obtain TPE material.

[0064] Preferably, the melt extrusion temperature is 170-250°C.

[0065] Preferably, melt extrusion is performed in a twin-screw extruder with an aspect ratio of 36:1 or higher. The aspect ratio of the twin-screw extruder can be selected as 36:1, 40:1, 42:1, 45:1, etc.

[0066] Thirdly, this application provides the application of the aforementioned TPE material in the overmolding of battery pack casings or explosion-proof tool casings. Examples of explosion-proof tool casings include explosion-proof casings for portable compressors.

[0067] Fourthly, this application provides a coated nylon product, which includes a nylon matrix and a coating material covering the surface of the nylon matrix, wherein the coating material is the TPE material.

[0068] Compared with the prior art, the beneficial effects of this application are as follows:

[0069] (1) The TPE material of this application uses polyether block amide as an antistatic agent; nylon is added to improve its strength, toughness and adhesion to PA; maleic anhydride-grafted polypropylene, maleic anhydride-grafted EPDM rubber and maleic anhydride-grafted hydrogenated styrene elastomer are added to improve the adhesion of the material to PA and adjust the hardness and improve the tensile strength; glycidyl methacrylate-grafted olefin copolymer elastomer is added to promote the compatibility of polyether block amide and hydrogenated styrene elastomer, improve antistatic properties, and at the same time increase the activity of maleic anhydride grafts to promote the adhesion of the material to nylon.

[0070] (2) The TPE material of this application can be well coated on PA with strong adhesion, good appearance, no abnormal texture on the surface, good antistatic properties, and good mechanical properties, such as high tensile strength. It is suitable for use in battery pack shell coating, explosion-proof tool shell coating and automotive parts coating. Detailed Implementation

[0071] To better illustrate the purpose, technical solutions, and advantages of this application, the following description, in conjunction with specific embodiments and comparative examples, aims to provide a detailed understanding of the content of this application, rather than limiting it. All other embodiments obtained by those skilled in the art without inventive effort are within the protection scope of this application. Unless otherwise specified, the experimental reagents and instruments involved in the implementation of this application are commonly used reagents and instruments. In this application, the technical features described in an open-ended manner include both closed-ended technical solutions composed of the listed features and open-ended technical solutions that include the listed features.

[0072] The raw materials used in the following embodiments and comparative examples are shown in Table 1, and unless otherwise specified, all raw materials are commercially available. Furthermore, the same raw materials were used in each parallel experiment.

[0073] Table 1

[0074]

[0075] The following examples and comparative examples all provide a TPE material, and the preparation methods of these materials are as follows:

[0076] Mineral oil was sprayed onto the hydrogenated styrene elastomer while stirring to obtain a premix.

[0077] The premixed material is mixed with other raw materials, added to a twin-screw extruder for melt extrusion, granulation, and drying to obtain TPE material. The twin-screw extruder has an aspect ratio of 42:1 and a melt extrusion temperature of 170-250℃.

[0078] The formulations of these examples and comparative TPE materials are shown in Tables 2 and 3.

[0079] Table 2

[0080]

[0081] Table 3

[0082]

[0083] The above embodiments and comparative examples were subjected to the following performance tests, and the test results are shown in Table 4.

[0084] Adhesion strength test method: Following the requirements of GB / T 7760-2003 standard, TPE material was injected into a nylon substrate sample (the nylon substrate sample material was glass fiber reinforced PA6 composite material, composed of the following weight parts: 100 parts PA6 (manufacturer and model as above), 30 parts glass fiber) using an injection molding machine in a specific mold. The injection temperature was 235℃. After being placed at 25℃ for 24 hours, a 90° peel test was performed using a tensile testing machine to measure the adhesion strength between the TPE material and the nylon substrate sample. The adhesion strength was then classified into the following grades:

[0085] A: It can be easily peeled off, leaving a smooth peeling surface with no residue;

[0086] B: There is resistance when peeling, and the residue on the peeling surface is less than 50%;

[0087] C: Difficult to peel off at the edges and corners, with 50% (excluding 50%)-99% residue remaining on the peeled surface, indicating strong peeling force;

[0088] D: Difficult to peel off the edges and corners, TPE breaks and cannot be peeled off.

[0089] Tensile strength test method: Tested according to ISO527-2012 standard. After injection molding into a standard square plate of 2*100*100mm, cut into type 2 strips using a cutter. After being placed at 25℃ for 24 hours, the tensile strength is tested using a tensile testing machine. The molding cycle is based on the cycle of injection molding tensile strips.

[0090] Surface resistivity testing method: After injection molding the sample into a standard square plate of 2*100*100mm, place it at 25℃ for 24 hours, and then use a surface resistivity meter to test its surface resistivity. For antistatic materials, the lower the surface resistivity, the better the antistatic performance; the higher the surface resistivity, the better the insulation performance. The surface resistivity of the object should be ≥10. 12 Ω is an insulator; greater than 10 5 Ω and less than or equal to 10 11 Ω represents an antistatic material.

[0091] Table 4

[0092]

[0093] The data above shows that the materials in each embodiment not only have excellent adhesion to PA, but also excellent mechanical and antistatic properties. For example, the adhesion strength to PA is above grade C, the tensile strength is above 3.8 MPa, and the surface resistivity is above 10. 11 Below Ω, the combined performance of the above three properties is good, making it suitable for use as a material for battery pack casing, explosion-proof tool casing, and automotive parts casing.

[0094] Compared to Example 1, Comparative Example 1 uses maleic anhydride-grafted polyethylene instead of maleic anhydride-grafted polypropylene. Due to the poor flowability of maleic anhydride-grafted polyethylene, it is not conducive to heat preservation and the reaction between maleic anhydride and nylon, resulting in poor adhesion performance of the material on PA.

[0095] Compared to Example 1, Comparative Example 2, which did not contain polyacrylamide, had a lower tensile strength.

[0096] Compared to Example 1, Comparative Examples 3-6 only added three of the following: glycidyl methacrylate-grafted olefin copolymer elastomer, maleic anhydride-grafted polypropylene, maleic anhydride-grafted EPDM rubber, and maleic anhydride-grafted hydrogenated styrene elastomer. This resulted in a decrease in the adhesion, tensile strength, and antistatic properties of the material on PA, indicating that these four compatibilizers synergistically improve the adhesion, tensile strength, and antistatic properties of the material.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit the scope of protection of this application. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the substance and scope of the technical solutions of this application.

Claims

1. A TPE material, characterized in that, The components include the following weight parts: hydrogenated styrene-based elastomer 8~32 parts, mineral oil 20~60 parts, nylon 1~15 parts, glycidyl methacrylate grafted olefin copolymer elastomer 1~10 parts, maleic anhydride grafted polypropylene 1~20 parts, maleic anhydride grafted ethylene-propylene-diene rubber 3~20 parts, maleic anhydride grafted hydrogenated styrene-based elastomer 1~20 parts, polyether block amide 8~12 parts, polyacrylamide 1~5 parts, and filler 5~50 parts.

2. The TPE material of claim 1, wherein, The weight ratio of the nylon to the polyacrylamide is (0.5~10):

1.

3. The TPE material of claim 1, wherein, The weight ratio of the nylon to the polyacrylamide is (1.3~3):

1.

4. The TPE material of claim 1, wherein, The polyether block amide is 8.8~11.2 parts by weight.

5. The TPE material of claim 1, wherein, At least one of conditions (1)~(6) is satisfied: (1) The hydrogenated styrene-based elastomer includes at least one of hydrogenated styrene-butadiene block copolymer and hydrogenated styrene-isoprene block copolymer; (2) The mineral oil includes at least one of silicone oil, paraffin oil, naphthenic oil, and aromatic hydrocarbon oil; (3) The nylon includes nylon 6; (4) The maleic anhydride grafted polypropylene includes at least one of maleic anhydride grafted homopolymer polypropylene, maleic anhydride grafted copolymer polypropylene, and maleic anhydride grafted random copolymer polypropylene; (5) The maleic anhydride grafted hydrogenated styrene-based elastomer includes at least one of maleic anhydride grafted hydrogenated styrene-butadiene block copolymer and maleic anhydride grafted hydrogenated styrene-isoprene block copolymer; (6) The filler includes at least one of white carbon black, wollastonite, calcium carbonate, glass beads, talc, kaolin, diatomite, barium sulfate, and mica.

6. The TPE material of claim 1, wherein, The components further include the following weight parts: auxiliary agent 0.01~2 parts.

7. The TPE material of claim 6, wherein, The auxiliary agent includes at least one of antioxidant, light stabilizer, and lubricant.

8. Process for the production of a TPE material according to any one of claims 1 to 7, characterized in that, The method includes the following steps: Spray the mineral oil into the hydrogenated styrene-based elastomer while stirring to obtain a premix; Mix the premix with other raw materials, melt extrude, granulate, dry, and obtain a TPE material.

9. The method for preparing the TPE material as described in claim 8, characterized in that, The temperature of the melt extrusion is 170-250℃.

10. Use of the TPE material according to any one of claims 1~7 in battery pack housing encapsulation, explosion-proof tool housing encapsulation, or vehicle part encapsulation.

11. An encapsulated nylon product characterized by, The encapsulated material includes a nylon base and a coating material coated on the surface of the nylon base, and the coating material is the TPE material according to any one of claims 1~7.

Images