Conductive PPE / PA alloy material with flame retardant effect as well as preparation method and application of conductive PPE / PA alloy material

Abstract

The invention relates to the technical field of polymer composite material processing, and discloses a conductive PPE / PA alloy material with a flame retardant effect, which is prepared from the following components in parts by weight: 30 to 45 parts of PPE resin, 28 to 41 parts of PA resin, 5 to 7 parts of compatilizer PPH, 11 to 15 parts of compatilizer GPM, 0.2 to 0.6 part of lubricant LY-320, 0.2 to 0.6 part of lubricant C181, 0.2 to 0.7 part of lubricant S370, 0.2 to 0.6 part of composite antioxidant, 1 to 10 parts of conductive additive and 5 to 10 parts of flame retardant. The conductive auxiliary agent is a carbon nanotube and / or conductive carbon black; the carbon nano tube is a single-wall carbon nano tube and / or a multi-wall carbon nano tube. The conductive PPE / PA alloy material obtained by the invention has better impact toughness, high fluidity, heat resistance and good flame retardance.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer composite material processing, and in particular to a conductive PPE / PA alloy material with flame retardant effect, a preparation method and application thereof. Background Art

[0002] Polyphenylene ether (PPE) is a white powder, non-toxic, transparent, low relative density, excellent mechanical strength, stress relaxation resistance, creep resistance, heat resistance, water resistance, water vapor resistance, dimensional stability, outstanding electrical insulation, good wear resistance and electrical properties, and the dielectric properties of PPE rank first among plastics. However, its poor melt fluidity, difficult processing and molding, and inability to resist non-polar solvents have greatly limited its application.

[0003] Nylon 66 (PA66) is a transparent or opaque milky white or light yellow granular material with horny and hard appearance. It has high mechanical strength, high softening point, heat resistance, low friction coefficient, wear resistance, self-lubrication, shock absorption and sound absorption. It is also resistant to oil, weak acids, weak alkalis and general solvents, has good electrical insulation, is self-extinguishing, non-toxic and odorless. It can also maintain strong strength and rigidity at higher temperatures, especially good heat resistance and corrosion resistance. However, due to the presence of amide groups in its structure, which are polar groups, nylon will undergo thermal degradation, hydrolysis and photodegradation in high temperature, humid or ultraviolet radiation environments, thereby affecting the dimensional stability and mechanical properties of its products, reducing the stability and service life of the products, which limits the application of nylon.

[0004] However, PPE is a non-crystalline polymer and PA66 is a semi-crystalline polymer. The simple blend of the two incompatible polymers has poor interfacial adhesion and lacks morphological stability. In addition, the difference in melt viscosity between PPE and PA66 will lead to stress cracking of this type of alloy, making it difficult to achieve satisfactory performance requirements in terms of impact performance, tensile and bending performance, which greatly limits the application of PPE and PA66 blends. Therefore, the development of alloy materials must be expanded through compatibilizers, and special preparation processes must be used to improve the shortcomings of polyphenylene ether PPE / nylon PA66, and combine their advantages to produce alloy materials with excellent performance.

[0005] Polyphenylene ether / polyamide (PPE / PA) is a plastic alloy with excellent comprehensive performance. It has the advantages of both PPE and PA: it has the heat resistance, dimensional stability and acid and alkali resistance of PPE. Compared with pure PPE, the melt viscosity of PPE / PA alloy is low and the processing difficulty is relatively low. It also has the solvent resistance and excellent mechanical properties of PA.

[0006] However, the conductivity of PPE / PA is poor. In order to expand its application scenarios in automobiles and other engineering fields, it is often required to be electrostatically sprayable. If it can have better flame retardant properties, it can also greatly improve safety and broaden the application scenarios. Due to the addition of flame retardant XS-FR-308, the dispersion performance of its conductive carbon black is also greatly improved; due to the presence of PA in PPE / PA alloy, its dimensional stability is worse than that of pure PPE. In some application scenarios with high dimensional accuracy requirements (commonly used in automotive parts), the dimensional stability of PPE / PA alloy still needs to be further improved. For example, Chinese patent CN109370211B discloses that PA / PPO alloy includes the following components: PPO resin, nylon (PA), toughening agent, compatibilizer, conductive carbon black, expanded graphite, and other additives. The alloy has high antistatic properties and conductive uniformity, but the dimensional stability of the alloy is relatively poor, and its conductivity needs to be further improved. Summary of the invention

[0007] The purpose of the present invention is to solve the above-mentioned technical problems and propose a conductive PPE / PA alloy material with flame retardant effect and a preparation method and application thereof.

[0008] The technical solutions adopted are as follows:

[0009] The first aspect of the present invention provides a conductive PPE / PA alloy material with flame retardant effect, which comprises the following components in parts by weight:

[0010] PPE resin 30-45 parts, PA resin 28-41 parts, compatibilizer PPH 5-7 parts, compatibilizer GPM 11-15 parts, lubricant LY-320 0.2-0.6 parts, lubricant C181 0.2-0.6 parts, lubricant S3700.2-0.7 parts, composite antioxidant 0.2-0.6 parts, conductive additive 1-10 parts, flame retardant 5-10 parts;

[0011] The conductive additive is carbon nanotube and / or conductive carbon black; the carbon nanotube is single-walled carbon nanotube and / or multi-walled carbon nanotube.

[0012] Preferably, the PPE resin is produced by Nantong Xingchen Synthetic Materials Co., Ltd. and has a molecular weight of 10,000 to 50,000.

[0013] Further preferably, the PA resin is produced by Pingdingshan Shenma Engineering Plastics Co., Ltd. and has a molecular weight of 10,000 to 50,000.

[0014] According to a particularly preferred specific embodiment, the preparation method of the compatibilizer PPH is as follows: weigh 80 parts of PPE, 20 parts of polystyrene, 3 parts of glycidyl methacrylate, 2 parts of maleic anhydride, 0.3 parts of di-tert-butyl peroxide isopropylbenzene, and 0.2 parts of benzoin according to mass fraction, put them into a high-speed mixer and mix them for 5 minutes, and discharge the materials; use a twin-screw extruder to perform blending and granulation to obtain polyphenylene ether grafted maleic anhydride; the twin-screw extrusion processing temperature is 240-260°C, and the screw speed is 38-42Hz.

[0015] Preferably, the conductive additive is carbon nanotubes and conductive carbon black in a weight ratio of 1:1.0 to 4.0.

[0016] Preferably, the carbon nanotubes are multi-walled carbon nanotubes.

[0017] Further preferably, the compatibilizer GPM is SEBS grafted with maleic anhydride, and the compatibilizer GPM is GPM5618 produced by Ningbo Nengzhiguang New Material Technology Co., Ltd.

[0018] Preferably, the composite antioxidant is tris[2,4-di-tert-butylphenyl]pentaerythritol ester and N,N'-bis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hexanediamine in a content ratio of 1:1.

[0019] Preferably, the flame retardant is produced by Ningbo Huiwangcheng Plastic Chemical Co., Ltd.

[0020] The second aspect of the present invention provides a method for preparing a conductive PPE / PA alloy material with flame retardant effect as described in the first aspect of the present invention, wherein the raw materials are weighed according to the weight ratio, put into a high-speed mixer for uniform mixing, and then blended and extruded through a twin-screw extruder, cooled, pelletized, and dried;

[0021] The mixing conditions at least meet the following requirements: stirring speed is 300 rpm, and the time is 2 to 5 min;

[0022] The parameter settings of the twin-screw extruder at least meet the following requirements: temperature is 240-260° C., and main engine speed is 46-50 Hz.

[0023] The third aspect of the present invention provides application of the conductive PPE / PA alloy material with flame retardant effect described in the first aspect of the present invention in automobiles.

[0024] Beneficial effects of the present invention:

[0025] (1) The present invention selects PPE resin and PA resin of a specific ratio as the matrix material (wherein the PPE resin is the main matrix material), and selects polyphenylene ether grafted maleic anhydride and SEBS grafted maleic anhydride of a specific content as the composite compatibilizer, wherein the polyphenylene ether grafted maleic anhydride is thermodynamically compatible with the PPE resin, and the PA resin is compatible with the block copolymer, so that the PPE resin and the PA resin can have good compatibility, and improve the compatibility between the components in the present invention. Among them, the grade of the PPE resin is LXN040, and this type of resin has good flowability and is conducive to dispersing the conductive medium; the grade of the PA resin is EPR24, and this type of resin has low viscosity, high strength, and good flowability, which is conducive to dispersing the conductive medium.

[0026] (2) The present invention selects a specific content of polyolefin elastomer as a toughening agent, and adds a specific content of a high-temperature composite antioxidant. Under the action of a block copolymer as a composite compatibilizer, and in combination with the other technical features of the present invention, the prepared PPE / PA alloy material has excellent properties of excellent impact toughness, fluidity, and long aging resistance. It also has excellent comprehensive properties such as rigidity, toughness, heat resistance and flame retardancy. Due to its excellent flame retardancy, its safety is greatly improved and it can be more widely used in more fields.

[0027] (3) The use of a special ratio of carbon nanotubes and conductive carbon black can improve the conductivity of the PPE / PA alloy and reduce the conductivity loss rate at high temperature. In addition, the carbon nanotubes are graded GC-30, a wet granulation product of multi-walled carbon nanotubes in a clustered and entangled state. The same or even better effect can be achieved by adding less parts, and it has excellent performance and considerable cost advantages.

[0028] (4) The flame retardant XS-FR-308 is added to the present invention. The flame retardant XS-FR-308 is a nitrogen-phosphorus composite, low-smoke expansion type flame retardant. It provides a highly effective flame retardant effect through the synergistic effect of nitrogen and phosphorus elements, does not contain toxic and harmful substances, and not only improves the dispersion of conductive carbon black, but also improves the flame retardancy of the material, thereby greatly improving safety. DETAILED DESCRIPTION

[0029] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0030] In the present invention, SEBS is a linear triblock copolymer with polystyrene as the terminal segment and ethylene-butene copolymer obtained by hydrogenating polybutadiene as the middle elastic block.

[0031] It should be noted that, in various aspects of the present invention, for the same components in various aspects, the present invention is described only once in one aspect without repeated description, which should not be understood by those skilled in the art as a limitation of the present invention.

[0032] The present invention will be described in detail below by way of examples. In the following examples, unless otherwise specified, the raw materials are all commercially available.

[0033] In the following examples, PPE resin, with an intrinsic viscosity of 0.3-0.6 dl / g and a molecular weight of 10,000-50,000, was purchased from Nantong Xingchen Synthetic Materials Co., Ltd., with a brand name of LXN040;

[0034] PA resin, molecular weight 10,000 to 50,000, purchased from Pingdingshan Shenma Engineering Plastics Co., Ltd., brand EPR24;

[0035] The compatibilizer GPM is SEBS grafted with maleic anhydride, purchased from Ningbo Nengzhiguang New Material Technology Co., Ltd., with the brand name GPM5618;

[0036] Tris[2,4-di-tert-butylphenyl]pentaerythritol ester, purchased from Beijing Jiyi Holding Group Co., Ltd., brand name Antioxidant 168;

[0037] N,N'-bis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hexanediamine, purchased from Chenghe Technology Co., Ltd., brand name Antioxidant 1098;

[0038] Lubricant LY-320, purchased from Suzhou Avanti New Materials Co., Ltd.;

[0039] Lubricant C181, purchased from Wuhan Hyperbranched Resin Technology Co., Ltd.;

[0040] Lubricant S370, purchased from Shanghai Sonnar New Materials Co., Ltd.;

[0041] Flame retardant XS-FR-308, purchased from Ningbo Huiwangcheng Plastic Chemical Co., Ltd.;

[0042] The conductive additive is carbon nanotubes and conductive carbon black in a content ratio of 1:4. The carbon nanotubes are purchased from Shandong Dazhan Nanomaterials Co., Ltd. with a brand name of GC-30; the conductive carbon black is purchased from Cabot (China) Investment Co., Ltd. with a brand name of Cabot-22.

[0043] Example 1

[0044] A conductive PPE / PA alloy material with flame retardant effect, comprising the following components in parts by weight:

[0045] 30 parts of PPE resin, 40.5 parts of PA resin, 6 parts of compatibilizer PPH, 11.5 parts of compatibilizer GPM, 0.3 parts of lubricant LY-320, 0.3 parts of lubricant C181, 0.3 parts of lubricant S370, 0.4 parts of composite antioxidant, 5 parts of conductive additive, and 6 parts of flame retardant XS-FR-308.

[0046] The composite antioxidant is tris[2,4-di-tert-butylphenyl]pentaerythritol ester and N,N'-bis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hexanediamine in a content ratio of 1:1, wherein the tris[2,4-di-tert-butylphenyl]pentaerythritol ester is 0.2 parts by weight.

[0047] The preparation method of the compatibilizer PPH is as follows: 80 parts of PPE, 20 parts of polystyrene, 3 parts of glycidyl methacrylate, 2 parts of maleic anhydride, 0.3 parts of di-tert-butyl peroxide isopropylbenzene, and 0.2 parts of benzoin are weighed by mass fraction, put into a high-speed mixer and mixed for 5 minutes, and discharged; blending and granulating are carried out by a twin-screw extruder to obtain the compatibilizer PPH (polyphenylene ether grafted maleic anhydride); the twin-screw extrusion processing temperature is 240-260°C, and the screw speed is 38-42Hz.

[0048] The preparation method of the conductive PPE / PA alloy material with flame retardant effect is as follows (according to the formula and process parameters in Table 1):

[0049] Weigh the raw materials according to the weight ratio, add all the raw materials except PA resin into a high-speed mixer and mix them evenly, add PA resin through side feeding, and then extrude them through a twin-screw extruder, cool, pelletize and dry.

[0050] Example 2

[0051] A conductive PPE / PA alloy material with flame retardant effect, comprising the following components in parts by weight:

[0052] 38 parts of PPE resin, 32.5 parts of PA resin, 6 parts of compatibilizer PPH, 11.5 parts of compatibilizer GPM, 0.3 parts of lubricant LY-320, 0.3 parts of lubricant C181, 0.3 parts of lubricant S370, 0.4 parts of composite antioxidant, 5 parts of conductive additive, and 6 parts of flame retardant XS-FR-308.

[0053] The composite antioxidant is tris[2,4-di-tert-butylphenyl]pentaerythritol ester and N,N'-bis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hexanediamine in a content ratio of 1:1, wherein the tris[2,4-di-tert-butylphenyl]pentaerythritol ester is 0.2 parts by weight.

[0054] The preparation method of the compatibilizer PPH is as follows: weigh 80 parts of PPE, 20 parts of polystyrene, 3 parts of glycidyl methacrylate, 2 parts of maleic anhydride, 0.3 parts of di-tert-butyl peroxide isopropylbenzene, and 0.2 parts of benzoin according to mass fraction, put them into a high-speed mixer and mix them for 5 minutes, and discharge the materials; use a twin-screw extruder to blend and granulate to obtain the compatibilizer PPH (polyphenylene ether grafted maleic anhydride); the twin-screw extrusion processing temperature is 240-260°C, and the screw speed is 38-42Hz.

[0055] The preparation method of the conductive PPE / PA alloy material with flame retardant effect is as follows (according to the formula and process parameters in Table 1):

[0056] Weigh the raw materials according to the weight ratio, add all the raw materials except PA resin into a high-speed mixer and mix them evenly, add PA resin through side feeding, and then extrude them through a twin-screw extruder, cool, pelletize and dry.

[0057] Example 3

[0058] A conductive PPE / PA alloy material with flame retardant effect, comprising the following components in parts by weight:

[0059] 42 parts of PPE resin, 28.5 parts of PA resin, 6 parts of compatibilizer PPH, 11.5 parts of compatibilizer GPM, 0.3 parts of lubricant LY-320, 0.3 parts of lubricant C181, 0.3 parts of lubricant S370, 0.4 parts of composite antioxidant, 5 parts of conductive additive, and 6 parts of flame retardant XS-FR-308.

[0060] The composite antioxidant is tris[2,4-di-tert-butylphenyl]pentaerythritol ester and N,N'-bis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hexanediamine in a content ratio of 1:1, wherein the tris[2,4-di-tert-butylphenyl]pentaerythritol ester is 0.2 parts by weight.

[0061] The preparation method of the compatibilizer PPH is as follows: weigh 80 parts of PPE, 20 parts of polystyrene, 3 parts of glycidyl methacrylate, 2 parts of maleic anhydride, 0.3 parts of di-tert-butyl peroxide isopropylbenzene, and 0.2 parts of benzoin according to mass fraction, put them into a high-speed mixer and mix them for 5 minutes, and discharge the materials; use a twin-screw extruder to perform blending and granulation to obtain the compatibilizer PPH (polyphenylene ether grafted maleic anhydride); the twin-screw extrusion processing temperature is 240-260°C, and the screw speed is 38-42Hz.

[0062] The preparation method of the conductive PPE / PA alloy material with flame retardant effect is as follows (according to the formula and process parameters in Table 1):

[0063] Weigh the raw materials according to the weight ratio, add all the raw materials except PA resin into a high-speed mixer and mix them evenly, add PA resin through side feeding, and then extrude them through a twin-screw extruder, cool, pelletize and dry.

[0064] Example 4

[0065] A conductive PPE / PA alloy material with flame retardant effect, comprising the following components in parts by weight:

[0066] 34 parts of PPE resin, 34 parts of PA resin, 5 parts of compatibilizer PPH, 12 parts of compatibilizer GPM, 0.2 parts of lubricant LY-320, 0.2 parts of lubricant C181, 0.2 parts of lubricant S370, 0.4 parts of composite antioxidant, 8 parts of conductive additive, and 6 parts of flame retardant XS-FR-308.

[0067] The composite antioxidant is tris[2,4-di-tert-butylphenyl]pentaerythritol ester and N,N'-bis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hexanediamine in a content ratio of 1:1, wherein the tris[2,4-di-tert-butylphenyl]pentaerythritol ester is 0.2 parts by weight.

[0068] The preparation method of the compatibilizer PPH is as follows: weigh 80 parts of PPE, 20 parts of polystyrene, 3 parts of glycidyl methacrylate, 2 parts of maleic anhydride, 0.3 parts of di-tert-butyl peroxide isopropylbenzene, and 0.2 parts of benzoin according to mass fraction, put them into a high-speed mixer and mix them for 5 minutes, and discharge the materials; use a twin-screw extruder to perform blending and granulation to obtain the compatibilizer PPH (polyphenylene ether grafted maleic anhydride); the twin-screw extrusion processing temperature is 240-260°C, and the screw speed is 38-42Hz.

[0069] The preparation method of the conductive PPE / PA alloy material with flame retardant effect is as follows (according to the formula and process parameters in Table 1):

[0070] Weigh the raw materials according to the weight ratio, add all the raw materials except PA resin into a high-speed mixer and mix them evenly, add PA resin through side feeding, and then extrude them through a twin-screw extruder, cool, pelletize and dry.

[0071] Table 1

[0072]

[0073]

[0074] Comparative Example 1

[0075] A conductive PPE / PA alloy material with flame retardant effect, comprising the following components in parts by weight:

[0076] 20 parts of PPE resin, 40.5 parts of PA resin, 6 parts of compatibilizer PPH, 11.5 parts of compatibilizer GPM, 0.3 parts of lubricant LY-320, 0.3 parts of lubricant C181, 0.3 parts of lubricant S370, 0.4 parts of composite antioxidant, 5 parts of conductive additive, and 6 parts of flame retardant XS-FR-308.

[0077] The composite antioxidant is tris[2,4-di-tert-butylphenyl]pentaerythritol ester and N,N'-bis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hexanediamine in a content ratio of 1:1, wherein the tris[2,4-di-tert-butylphenyl]pentaerythritol ester is 0.2 parts by weight.

[0078] The preparation method of the compatibilizer PPH is as follows: weigh 80 parts of PPE, 20 parts of polystyrene, 3 parts of glycidyl methacrylate, 2 parts of maleic anhydride, 0.3 parts of di-tert-butyl peroxide isopropylbenzene, and 0.2 parts of benzoin according to mass fraction, put them into a high-speed mixer and mix them for 5 minutes, and discharge the materials; use a twin-screw extruder to blend and granulate to obtain the compatibilizer PPH (polyphenylene ether grafted maleic anhydride); the twin-screw extrusion processing temperature is 240-260°C, and the screw speed is 38-42Hz.

[0079] The preparation method of the conductive PPE / PA alloy material with flame retardant effect is as follows (according to the formula and process parameters in Table 1):

[0080] Weigh the raw materials according to the weight ratio, add all the raw materials except PA resin into a high-speed mixer and mix them evenly, add PA resin through side feeding, and then extrude them through a twin-screw extruder, cool, pelletize and dry.

[0081] Comparative Example 2

[0082] The method of Example 1 was followed, except that the amount of PA resin used was 50 parts, and the other parameters and methods were the same as those of Example 1.

[0083] Comparative Example 3

[0084] The method of Example 1 is followed, except that the conductive additive is carbon nanotubes and conductive carbon black in a weight ratio of 1:5. Other parameters and methods are the same as those of Example 1.

[0085] Comparative Example 4

[0086] The method of Example 1 was followed, except that GC-22 carbon nanotubes and XC-72 conductive carbon black were used instead. The remaining parameters and methods were the same as those of Example 1.

[0087] Comparative Example 5

[0088] The method of Example 1 was followed, except that the flame retardant OP-1230 was used instead of the flame retardant XS-FR-308. The remaining parameters and methods were the same as those of Example 1.

[0089] Test Example 1

[0090] The high-toughness PPE / PPS alloy materials prepared in the above examples and comparative examples were placed in a vacuum oven, dried at 120°C for 2 hours, transferred to an injection molding machine, and injection molded at 265-280°C to obtain a sample strip, which was placed in an environment with a temperature of 23±2°C and a relative humidity of 50±10% for 48 hours, and then subjected to a performance test;

[0091] The melt index is tested according to ISO 1133 standard;

[0092] The tensile strength is tested according to ASTM D638 standard;

[0093] The bending strength is tested according to ASTM D790 standard;

[0094] The notched impact strength is tested according to ASTM D256 standard;

[0095] The heat deformation temperature is tested according to ASTM D648 standard;

[0096] Flame retardancy is tested according to UL-94-1985 standard;

[0097] The test results are shown in Table 2.

[0098] Table 2

[0099]

[0100]

[0101] It can be seen from the results in Table 2 that the technical solution of the present invention, in combination with other technical features such as the specific process of the twin-screw extruder, well solves the compatibility problem of the raw materials. The conductive PPE / PA alloy material with flame retardant effect obtained in the embodiment of the present invention has significantly better impact toughness, high fluidity, heat resistance, and good flame retardancy.

[0102] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A conductive PPE / PA alloy material with flame retardant effect, characterized in that The composition is calculated by weight: PPE resin 30-45 parts, PA resin 28-41 parts, compatibilizer PPH 5-7 parts, compatibilizer GPM 11-15 parts, lubricant LY-320 0.2-0.6 parts, lubricant C181 0.2-0.6 parts, lubricant S3700.2-0.7 parts, composite antioxidant 0.2-0.6 parts, conductive additive 1-10 parts, flame retardant 5-10 parts; The conductive additive is carbon nanotube and / or conductive carbon black; the carbon nanotube is single-walled carbon nanotube and / or multi-walled carbon nanotube.

2. The conductive PPE / PA alloy material with flame retardant effect according to claim 1, wherein: The PPE resin is produced by Nantong Xingchen Synthetic Materials Co., Ltd. and has a molecular weight of 10,000 to 50,000; And / or, the PA resin is produced by Pingdingshan Shenma Engineering Plastics Co., Ltd. and has a molecular weight of 10,000 to 50,000.

3. The conductive PPE / PA alloy material with flame retardant effect according to claim 1 or 2, wherein: The preparation method of the compatibilizer PPH is as follows: weigh 80 parts of PPE, 20 parts of polystyrene, 3 parts of glycidyl methacrylate, 2 parts of maleic anhydride, 0.3 parts of di-tert-butyl peroxide isopropylbenzene, and 0.2 parts of benzoin according to mass fraction, put them into a high-speed mixer and mix them for 5 minutes, and then discharge the materials; use a twin-screw extruder to perform blending and granulation to obtain polyphenylene ether grafted maleic anhydride; the twin-screw extrusion processing temperature is 240-260° C., and the screw speed is 38-42 Hz.

4. The conductive PPE / PA alloy material with flame retardant effect according to claim 1 or 2, wherein: The conductive auxiliary agent is carbon nanotubes and conductive carbon black in a weight ratio of 1:1.0 to 4.

0.

5. The conductive PPE / PA alloy material with flame retardant effect according to claim 4, wherein: The carbon nanotubes are preferably multi-walled carbon nanotubes.

6. The conductive PPE / PA alloy material with flame retardant effect according to claim 1 or 2, wherein: The compatibilizer GPM is SEBS grafted with maleic anhydride, and the compatibilizer GPM is GPM5618 produced by Ningbo Nengzhiguang New Material Technology Co., Ltd.

7. The conductive PPE / PA alloy material with flame retardant effect according to claim 1 or 2, wherein: The composite antioxidant is tris[2,4-di-tert-butylphenyl]pentaerythritol ester and N,N'-bis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hexanediamine in a content ratio of 1:

1.

8. The conductive PPE / PA alloy material with flame retardant effect according to claim 1, wherein: The flame retardant is produced by Ningbo Huiwangcheng Plastic Chemical Co., Ltd.

9. A method for preparing a conductive PPE / PA alloy material with flame retardant effect as claimed in any one of claims 1 to 8, characterized in that: The raw materials are weighed according to the weight ratio, put into a high-speed mixer to mix evenly, and then blended and extruded through a twin-screw extruder, cooled, pelletized, and dried; The mixing conditions at least meet the following requirements: stirring speed is 300 rpm, and the time is 2 to 5 min; The parameter settings of the twin-screw extruder at least meet the following requirements: temperature is 240-260° C., and main engine speed is 46-50 Hz.

10. Use of the conductive PPE / PA alloy material with flame retardant effect according to claims 1-8 in automobiles.

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