A polyphenylene ether-polyamide composition and its preparation method and application

Abstract

The present invention discloses a polyphenylene ether-polyamide composition, a preparation method and an application thereof, and belongs to the technical field of polymer materials. The polyphenylene ether-polyamide composition comprises the following components in parts by weight: 14 to 32 parts of polyphenylene ether resin, 19 to 36 parts of polyamide resin, 1.8 to 8.2 parts of hypophosphite flame retardant, 0.8 to 5.2 parts of zinc-containing flame retardant, 0.5 to 2.1 parts of metal hydroxide flame retardant, and 8 to 42 parts of glass fiber; the zinc-containing flame retardant is at least one of zinc borate and zinc oxide; the metal hydroxide flame retardant is at least one of calcium hydroxide, magnesium hydroxide, and aluminum hydroxide. The polyphenylene ether-polyamide composition has excellent candle burning resistance, flame retardancy and heat retention stability.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and in particular to a polyphenylene ether-polyamide composition, a preparation method and an application thereof. Background Art

[0002] Polyphenylene ether-polyamide (PPE / PA) alloy is a commonly used engineering plastic alloy that combines the high heat resistance, high dimensional stability, and low water absorption of PPE with the excellent solvent resistance and good processing properties of PA. It is currently widely used in new energy vehicles, electronic appliances, high-speed fans, and other fields. In halogen-free flame-retardant PPE / PA alloy systems, hypophosphite flame retardants are often used due to their high compatibility with PA to prevent migration and precipitation of the flame retardant during use, which could affect the material's mechanical properties and flame retardancy.

[0003] To ensure the alloy's ablation resistance, high levels of hypophosphite flame retardants are often added. This decomposition of the flame retardant during processing generates acidic substances that can degrade the PA and corrode processing equipment. This is particularly true for automotive battery top covers, where the large size of the product leads to long heat retention times during processing, resulting in a significant loss of toughness. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a polyphenylene ether-polyamide composition and its preparation method and application, which has excellent candle burning resistance, flame retardant properties and heat retention stability.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A polyphenylene ether-polyamide composition comprises the following components in parts by weight: 14 to 32 parts of polyphenylene ether resin, 19 to 36 parts of polyamide resin, 1.8 to 8.2 parts of hypophosphite flame retardant, 0.8 to 5.2 parts of zinc-containing flame retardant, 0.5 to 2.1 parts of metal hydroxide flame retardant, and 8 to 42 parts of glass fiber;

[0007] The zinc-containing flame retardant is at least one of zinc borate and zinc oxide;

[0008] The metal hydroxide flame retardant is at least one of calcium hydroxide, magnesium hydroxide and aluminum hydroxide.

[0009] The present invention combines the above-mentioned various raw materials in a specific ratio to obtain a polyphenylene ether-polyamide composition with excellent candle burning resistance, flame retardancy and heat retention stability.

[0010] The present invention combines a hypophosphite flame retardant, a zinc-containing flame retardant, and a metal hydroxide flame retardant in the aforementioned specific amounts to achieve a synergistic flame retardant effect. During combustion, the zinc-containing flame retardant effectively isolates oxygen and absorbs heat for cooling, significantly reducing smoke emission density. Simultaneously, it quickly fills holes and cracks in the newly formed carbon layer on the surface, accelerating carbonization and increasing carbon layer strength, thereby achieving the goal of reducing the amount of hypophosphite flame retardant added while maintaining the material's high-temperature ablation resistance. Furthermore, the zinc flame retardant, acting as a Brønsted base, neutralizes the acidic substances produced by the hypophosphite during high-temperature processing, protecting the resin in the system from decomposition, expanding the material's processing window, and ensuring the material's performance stability. The metal hydroxide flame retardant's thermal decomposition process produces gaseous water, which can cover the flame, expel oxygen, and dilute combustible gases. Furthermore, the decomposition products form an insulating layer on the plastic surface in contact with the flame, blocking the flow of combustible gases and thus preventing the spread of the flame. This is similar to the carbonization effect of phosphorus-based flame retardants. At the same time, metal hydroxide flame retardants can significantly neutralize the acidic substances in hypophosphite. Through the synergistic effect of hypophosphite flame retardants, zinc-containing flame retardants, and metal hydroxide flame retardants, it can not only ensure the ablation resistance effect, but also significantly improve the material's candle resistance and thermal retention stability.

[0011] The polyphenylene ether resin is used in an amount of 14 to 32 parts, for example, 14 parts, 15 parts, 20 parts, 22 parts, 25 parts, 28 parts, 30 parts, 32 parts or a range consisting of any two of these values.

[0012] Preferably, the amount of the polyphenylene ether resin is 15 to 30 parts.

[0013] The polyamide resin is used in an amount of 19 to 36 parts, for example, 19 parts, 20 parts, 22 parts, 25 parts, 28 parts, 30 parts, 32 parts, 35 parts, 36 parts or a range consisting of any two of these values.

[0014] Preferably, the amount of the polyamide resin is 20 to 35 parts.

[0015] Preferably, the amount of the hypophosphite flame retardant is 1.8 to 8.2 parts, for example, it can be 1.8 parts, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 8.2 parts or a range consisting of any two of these values.

[0016] Preferably, the amount of the hypophosphite flame retardant is 2 to 8 parts.

[0017] Preferably, the amount of the zinc-containing flame retardant is 0.8 to 5.2 parts, for example, it can be 0.8 parts, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 5.2 parts or a range consisting of any two of these values.

[0018] Preferably, the zinc-containing flame retardant is used in an amount of 1 to 5 parts.

[0019] Preferably, the amount of the metal hydroxide flame retardant is 0.5 to 2.1 parts, for example, it can be 0.5 parts, 0.6 parts, 0.8 parts, 1 part, 1.2 parts, 1.5 parts, 1.8 parts, 2 parts, 2.1 parts or a range consisting of any two of these values.

[0020] Preferably, the amount of the metal hydroxide flame retardant is 0.6 to 2 parts.

[0021] Preferably, the amount of the glass fiber is 8 to 42 parts, for example, 8 parts, 10 parts, 20 parts, 30 parts, 40 parts, 42 parts or a range consisting of any two of these values.

[0022] Preferably, the amount of the glass fiber is 10 to 40 parts.

[0023] Wherein, in the polyphenylene ether-polyamide composition of the present invention, the weight percentage of the polyphenylene ether resin is preferably not less than 22%.

[0024] Wherein, in the polyphenylene ether-polyamide composition of the present invention, the weight percentage of the polyamide resin is preferably not less than 19%.

[0025] In the polyphenylene ether-polyamide composition of the present invention, the sum of the weight percentages of the polyphenylene ether resin and the polyamide resin is preferably not less than 49%.

[0026] Preferably, the polyphenylene ether-polyamide composition comprises the following components in parts by weight: 15 to 30 parts of polyphenylene ether resin, 20 to 35 parts of polyamide resin, 2 to 8 parts of hypophosphite flame retardant, 1 to 5 parts of zinc-containing flame retardant, 0.6 to 2 parts of metal hydroxide flame retardant, and 10 to 40 parts of glass fiber.

[0027] Preferably, the polyphenylene ether-polyamide composition comprises the following components in parts by weight: 18 to 25 parts of polyphenylene ether resin, 25 to 32 parts of polyamide resin, 4 to 6 parts of hypophosphite flame retardant, 2 to 4 parts of zinc-containing flame retardant, 1 to 1.5 parts of metal hydroxide flame retardant, and 20 to 30 parts of glass fiber. In particular, when the weight of each component is below this level, the combined effect of each component further improves the candle burning resistance, flame retardancy and thermal retention stability.

[0028] Preferably, the following components are included in parts by weight: 18 to 25 parts of polyphenylene ether resin, 25 to 32 parts of polyamide resin, 4 to 6 parts of hypophosphite flame retardant, 2 to 4 parts of zinc-containing flame retardant, 1 to 1.5 parts of metal hydroxide flame retardant, and 20 to 30 parts of glass fiber. In particular, when the weight of each component is below this level, the combined effect of each component further improves the candle burning resistance, flame retardancy and heat retention stability.

[0029] Preferably, the zinc-containing flame retardant is zinc borate. In particular, when zinc borate is used as the zinc-containing flame retardant, it can better neutralize the acidic substances generated by hypophosphite during high-temperature processing, thereby ensuring the performance stability of the material.

[0030] Preferably, the average particle size of the zinc borate is 2 to 10 μm.

[0031] Preferably, the average particle size of the zinc oxide is 10 to 60 μm.

[0032] Preferably, the metal hydroxide flame retardant is calcium hydroxide. When calcium hydroxide is used as the metal hydroxide flame retardant, the synergistic effect of the hypophosphite flame retardant, the zinc-containing flame retardant, and the metal hydroxide flame retardant is more obvious.

[0033] Preferably, the average particle size of the metal hydroxide flame retardant is 1 to 100 μm.

[0034] Preferably, the average particle size of the metal hydroxide flame retardant is 1 to 60 μm. Preferably, the average particle size of the metal hydroxide flame retardant is 1 to 10 μm.

[0035] Preferably, the hypophosphite flame retardant is diethyl aluminum hypophosphite.

[0036] Preferably, the average particle size of the diethyl aluminum hypophosphite is 20 to 40 μm.

[0037] In the present invention, the average particle sizes of the zinc borate, metal hydroxide flame retardant, and diethylaluminum hypophosphite are obtained by testing according to GB / T 19077.

[0038] Preferably, the intrinsic viscosity of the polyphenylene ether resin is 0.35 to 0.45 dl / g, for example, 0.35 dl / g, 0.36 dl / g, 0.38 dl / g, 0.4 dl / g, 0.42 dl / g, 0.45 dl / g or a range consisting of any two of these values.

[0039] The intrinsic viscosity of the polyphenylene ether resin is tested according to HG / T 2364-1992, the test temperature is 25° C., and the test solvent is chloroform.

[0040] Preferably, the polyamide resin has a glass transition temperature of 200-220°C and a thermal decomposition temperature of 440-460°C.

[0041] Preferably, the polyamide is at least one of PA6, PA66, PA66 / 6T, and PA6I / 6T.

[0042] Preferably, the polyamide is PA66. In the specific system of the present invention, the effect of using PA66 is better than other nylons (such as nylon 6).

[0043] Preferably, the polyamide resin has a terminal carboxyl content of ≤72 mmol / kg.

[0044] Preferably, the polyamide resin has a terminal carboxyl content of 56 to 70 mmol / kg, for example, 56 mmol / kg, 58 mmol / kg, 60 mmol / kg, 62 mmol / kg, 65 mmol / kg, 68 mmol / kg, 70 mmol / kg, or a range consisting of any two of these values. In the present invention, the terminal carboxyl content of the polyamide resin is titrated using a fully automatic potentiometric titrator; 0.5 g of a polyamide sample is added to 50 mL of o-cresol, refluxed to dissolve, cooled, and rapidly added with 400 μL of formaldehyde solution. The terminal carboxyl content is titrated with a standardized KOH-ethanol solution.

[0045] Preferably, the terminal amino group content of the polyamide resin is 30 to 56 mmol / kg, for example, it can be 30 mmol / kg, 32 mmol / kg, 35 mmol / kg, 38 mmol / kg, 40 mmol / kg, 42 mmol / kg, 45 mmol / kg, 48 mmol / kg, 50 mmol / kg, 52 mmol / kg, 55 mmol / kg, 56 mmol / kg or a range consisting of any two of these values.

[0046] Preferably, the polyamide resin has a terminal amino group content of 50 to 56 mmol / kg.

[0047] In the present invention, the test method for the terminal amino group content of the nylon resin is as follows: the terminal amino group content of the sample is titrated using a fully automatic potentiometric titrator, 0.5 g of the nylon resin sample to be tested is added to a mixed solution of phenol (45 mL) and anhydrous methanol (3 mL), heated to reflux, and after observing that the sample is completely dissolved, it is cooled to room temperature and the terminal amino group content is titrated with a calibrated hydrochloric acid standard solution.

[0048] Preferably, the relative viscosity of the polyurethane resin is 2 to 3.5.

[0049] Preferably, the relative viscosity of the polyamide resin is 3 to 3.5.

[0050] In the present invention, the relative viscosity of the polyamide resin is tested by measuring the relative viscosity of the polyamide resin at a concentration of 0.01 g / dL in 98% concentrated sulfuric acid at 25±0.01°C.

[0051] During melt blending, the terminal carboxyl groups of the polyamide resin combine with the hydroxyl groups on the surface of the glass fiber, the hydroxyl groups on the surface of the zinc-containing flame retardant, and the hydroxyl groups on the surface of the metal hydroxide flame retardant, thereby effectively improving the binding force between the polyamide and the glass fiber, the zinc-containing flame retardant, and the metal hydroxide flame retardant, further improving the intermolecular force, and thus effectively improving the thermal stability of the composition. When the terminal carboxyl groups of the polyamide resin are too low, sufficient carboxyl groups cannot be provided. When the terminal carboxyl groups of the polyamide resin are too high, the thermal stability is reduced.

[0052] Preferably, the polyphenylene ether-polyamide composition may further include at least one of a toughening agent, mineral powder, a lubricant, a colorant, an antioxidant, a weathering agent, a nucleating agent, and an antistatic agent.

[0053] The polyphenylene ether-polyamide composition of the present invention may include a toughening agent. Suitable toughening agents include, but are not limited to, ethylene-octene copolymer, SEBS, maleic anhydride grafted POE, maleic anhydride grafted SEBS, and combinations thereof.

[0054] The polyphenylene ether-polyamide composition of the present invention may include mineral powder. Suitable mineral powders include, but are not limited to, calcium carbonate, mica, kaolin, magnesium hydroxide, boehmite, and combinations thereof.

[0055] The polyphenylene ether-polyamide composition of the present invention may be colorized. Suitable colorants include, but are not limited to, carbon black, titanium dioxide, zinc sulfide, iron red, titanium yellow, and combinations thereof.

[0056] The polyphenylene ether-polyamide composition of the present invention may include a lubricant. Suitable lubricants include, but are not limited to, polyethylene wax, fatty acid esters, hyperbranched amides, and combinations thereof.

[0057] The polyphenylene ether-polyamide composition of the present invention may include an antioxidant. Suitable antioxidants include, but are not limited to, antioxidant 1098, antioxidant 1010, antioxidant 1076, antioxidant 168, and combinations thereof.

[0058] The polyphenylene ether-polyamide composition of the present invention may include a weathering agent. Suitable weathering agents include, but are not limited to, hindered amine light stabilizers, benzotriazole ultraviolet light absorbers, and combinations thereof.

[0059] The polyphenylene ether-polyamide composition of the present invention may include a nucleating agent. Suitable nucleating agents include, but are not limited to, sodium phenylphosphinate, silicon dioxide, talc, and combinations thereof.

[0060] The polyphenylene ether-polyamide composition of the present invention may include an antistatic agent. Suitable antistatic agents include, but are not limited to, zinc oxide, manganese dioxide, chromium trioxide, and combinations thereof.

[0061] The present invention also provides a method for preparing a polyphenylene ether-polyamide composition, comprising the following steps:

[0062] After uniformly mixing the components according to the ratio, the components are extruded and granulated by a twin-screw extruder to obtain a polyphenylene ether-polyamide composition.

[0063] The present invention also provides the use of the polyphenylene ether-polyamide composition in the preparation of automobile parts.

[0064] The beneficial effects of the present invention are as follows: the polyphenylene ether-polyamide composition described in the present invention has excellent candle burning resistance, flame retardant properties and thermal retention stability. The present invention ensures the ablation resistance effect and significantly improves the candle burning resistance and thermal retention stability of the material through the synergistic effect of hypophosphite flame retardants, zinc-containing flame retardants and metal hydroxide flame retardants. DETAILED DESCRIPTION

[0065] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0066] In this application, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0067] In this application, when referring to numerical ranges, unless otherwise specified, the numerical ranges are considered continuous and include the minimum and maximum values ​​of the range, as well as every value between such minimum and maximum values. Further, when a range refers to an integer, every integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe a feature or characteristic, the ranges can be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges subsumed therein.

[0068] The raw materials used in the embodiments and comparative examples are described as follows:

[0069] Polyphenylene ether resin 1 (PPE-1): having an intrinsic viscosity of 0.35 dL / g, purchased from Dalian Zhongmu Chemical, brand ZM PPE-35.

[0070] Polyphenylene ether resin 2 (PPE-2): having an intrinsic viscosity of 0.45 dL / g, purchased from Dalian Zhongmu Chemical, brand ZM PPE-45.

[0071] Polyphenylene ether resin 3 (PPE-3): intrinsic viscosity is 0.3 dL / g, purchased from Dalian Zhongmu Chemical, brand ZMPPE-30.

[0072] Polyphenylene ether resin 4 (PPE-4): intrinsic viscosity is 0.5 dL / g, purchased from Dalian Zhongmu Chemical, brand ZMPPE-50.

[0073] Polyamide (PA-1): PA66, with a terminal carboxyl content of 70 mmol / kg, purchased from Shenma Engineering Plastics, brand EPR27.

[0074] Polyamide (PA-2): PA66, with a terminal carboxyl content of 56 mmol / kg, purchased from Shenma Engineering Plastics, brand EPR32.

[0075] Polyamide (PA-3): PA66, with a terminal carboxyl content of 80 mmol / kg, purchased from Shenma Engineering Plastics, brand EPR24.

[0076] Polyamide (PA-4): PA6, HY-2500A, Haiyang, Jiangsu.

[0077] Diethylaluminum hypophosphite: Clariant, brand OP1230.

[0078] Zinc borate: Anhui Yishitong Co., Ltd., brand ZB-03.

[0079] Zinc oxide: Xinyuan Chemical Co., Ltd., brand BAO-05.

[0080] Calcium hydroxide: average particle size 5 μm, commercially available.

[0081] Magnesium hydroxide: average particle size 5 μm, commercially available.

[0082] Aluminum hydroxide: average particle size 5 μm, commercially available.

[0083] Fiberglass: Jushi Group, ECS10-03-568H.

[0084] Unless otherwise specified, the components and raw materials used in the examples and comparative examples of the present invention are all commercially available raw materials, and the components and raw materials used in each parallel experiment are all of the same kind.

[0085] Examples 1 to 13, Comparative Examples 1 to 7

[0086] The formulations of the polyphenylene ether-polyamide compositions of Examples 1 to 13 and Comparative Examples 1 to 7 are shown in Tables 1 and 2 (all in parts by weight).

[0087] The preparation methods of the polyphenylene ether-polyamide compositions of Examples 1 to 13 and Comparative Examples 1 to 7 all comprise the following steps:

[0088] According to the ratio, each component is put into a high-speed mixer and dispersed evenly, and then added into a twin-screw extruder for extrusion and granulation to obtain a polyphenylene ether-polyamide composition; wherein the extrusion temperature is 270-300°C and the screw speed is 400rpm.

[0089] Table 1

[0090]

[0091]

[0092] Table 2

[0093]

[0094] Performance Testing

[0095] Thermal retention performance: The melt index instrument is heated at 300℃ for 15 minutes, and the melt index is tested at 280℃ / 5kg. The results are compared with those under normal conditions and the rate of change is calculated.

[0096] Flame retardant performance: tested in accordance with UL94 standard, the thickness of the burning specimen is 1.6mm.

[0097] Ablation resistance: The material was processed into a 2*150*150mm square plate, placed horizontally, and subjected to 1200℃ flame ablation. The burn-through time was recorded.

[0098] Table 3

[0099]

[0100]

[0101] As can be seen from Table 3, the polyphenylene ether-polyamide composition of the present invention has excellent candle burning resistance, flame retardancy and thermal retention stability. The polyphenylene ether-polyamide composition has a melt index change rate of ≤20%, a flame retardancy grade ≥V-0, and a burn-through time ≥57 min.

[0102] From the comparison of Examples 1 to 4, it can be seen that by controlling the weight of each raw material to: 18 to 25 parts of polyphenylene ether resin, 25 to 32 parts of polyamide resin, 4 to 6 parts of hypophosphite flame retardant, 2 to 4 parts of zinc-containing flame retardant, 1 to 1.5 parts of metal hydroxide flame retardant, and 20 to 30 parts of glass fiber, a polyphenylene ether-polyamide composition with better candle resistance, flame retardant properties and thermal retention stability can be obtained.

[0103] Comparing Example 3 with Examples 5 to 7, it can be seen that the present invention further improves the candle burning resistance, flame retardancy and heat retention stability by controlling the intrinsic viscosity of the polyphenylene ether resin to 0.35 to 0.45 dl / g.

[0104] Comparing Example 3 with Examples 8 to 9, it can be seen that the present invention further improves the candle burning resistance, flame retardancy and heat retention stability by controlling the terminal carboxyl content of the polyamide resin to ≤72 mmol / kg.

[0105] Comparing Example 3 with Example 10, it can be seen that in the specific system of the present invention, the effect of using PA66 is better than that of other nylons (such as nylon 6).

[0106] Comparing Example 3 with Example 11, it can be seen that zinc borate can further improve candle burning resistance, flame retardancy and heat retention stability compared to zinc oxide.

[0107] Comparing Example 3 with Examples 12 to 13, it can be seen that the use of calcium hydroxide can further improve the candle burning resistance, flame retardancy and heat retention stability compared to magnesium hydroxide and aluminum hydroxide.

[0108] Comparing Example 3 with Comparative Examples 1 to 3, it can be seen that the phosphate flame retardant, zinc-containing flame retardant, and metal hydroxide flame retardant described in the present invention have a significant synergistic effect. The combination of the three significantly improves the candle burning resistance, flame retardancy, and heat retention stability.

[0109] By comparing Example 3 with Comparative Examples 4 to 5, it can be seen that by controlling the amount of phosphate flame retardant, zinc-containing flame retardant, and metal hydroxide flame retardant within the scope of the present invention, the candle burning resistance, flame retardant performance, and heat retention stability are significantly improved.

[0110] Comparison of Example 3 with Comparative Examples 6 to 7 shows that by controlling the amounts of polyphenylene ether and polyamide within the scope of the present invention, the candle burning resistance, flame retardancy and heat retention stability are significantly improved.

[0111] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A polyphenylene ether-polyamide composition, characterized in that The invention comprises the following components in parts by weight: 14 to 32 parts of polyphenylene ether resin, 19 to 36 parts of polyamide resin, 1.8 to 8.2 parts of hypophosphite flame retardant, 0.8 to 5.2 parts of zinc-containing flame retardant, 0.5 to 2.1 parts of metal hydroxide flame retardant, and 8 to 42 parts of glass fiber; The zinc-containing flame retardant is at least one of zinc borate and zinc oxide; The metal hydroxide flame retardant is at least one of calcium hydroxide, magnesium hydroxide, and aluminum hydroxide; The polyamide resin has a terminal carboxyl content of 56 to 72 mmol / kg.

2. The polyphenylene ether-polyamide composition according to claim 1, characterized in that The invention comprises the following components in parts by weight: 18 to 25 parts of polyphenylene ether resin, 25 to 32 parts of polyamide resin, 4 to 6 parts of hypophosphite flame retardant, 2 to 4 parts of zinc-containing flame retardant, 1 to 1.5 parts of metal hydroxide flame retardant and 20 to 30 parts of glass fiber.

3. The polyphenylene ether-polyamide composition according to claim 1, characterized in that The zinc-containing flame retardant is zinc borate.

4. The polyphenylene ether-polyamide composition according to claim 1, characterized in that The metal hydroxide flame retardant is calcium hydroxide.

5. The polyphenylene ether-polyamide composition according to claim 1, characterized in that The hypophosphite flame retardant is diethyl aluminum hypophosphite.

6. The polyphenylene ether-polyamide composition according to claim 1, characterized in that The intrinsic viscosity of the polyphenylene ether resin is 0.35-0.45 dl / g. The intrinsic viscosity of the polyphenylene ether resin is tested according to HG / T 2364-1992, the test temperature is 25° C., and the test solvent is chloroform.

7. The polyphenylene ether-polyamide composition according to claim 1, characterized in that The polyamide is at least one of PA6, PA66, PA66 / 6T, and PA6I / 6T.

8. The method for preparing the polyphenylene ether-polyamide composition according to any one of claims 1 to 7, characterized in that: The following steps are involved: After uniformly mixing the components according to the ratio, the components are extruded and granulated by a twin-screw extruder to obtain a polyphenylene ether-polyamide composition.

9. Use of the polyphenylene ether-polyamide composition according to any one of claims 1 to 7 in the preparation of automotive parts.

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