A kind of high temperature resistant nylon engineering plastic and preparation method thereof

Abstract

The present invention relates to a kind of high temperature resistant nylon engineering plastic and preparation method thereof, and belongs to the technical field of polymer materials. The high temperature resistant nylon engineering plastic comprises, by weight, 80-120 parts of nylon resin, 4-6 parts of inorganic filler, 4-6 parts of glass fiber, 2-10 parts of heat-resistant modifier, 1-2 parts of coupling agent, 1-3 parts of polyethylene wax, 0.5-1.5 parts of antioxidant, and 1-2 parts of flame retardant; the carbonyl and maleimide groups of the heat-resistant modifier strengthen the intermolecular effect, improve the glass transition temperature and melting point, and the intermediate products 1 and 2 enhance the high temperature resistance. In addition, the sulfone group absorbs electrons to enhance thermal stability, and the tetrahydrofuran ring and acrylate resist decomposition, thereby improving stability and water resistance; the flame retardant boron and nitrogen cooperate, form a B-O-C carbon layer at high temperature, release flame retardant gas, and significantly improve flame retardant performance. The high temperature resistant nylon engineering plastic prepared by the present invention not only has good high temperature resistance and water resistance, but also has excellent flame retardant performance.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, and in particular to a high temperature resistant nylon engineering plastic and a preparation method thereof. Background Art

[0002] Nylon (PA), as an important engineering plastic, occupies a leading position in the market due to its excellent performance. With the advancement of science and technology and the increasing industrial demand, higher requirements are placed on the performance of nylon engineering plastics.

[0003] Although nylon engineering plastics are widely used, their relatively low heat deformation temperature and poor heat resistance can easily lead to material deformation and strength loss, thus limiting their application in high-temperature fields. In addition, nylon materials themselves are flammable. When a fire occurs, nylon engineering plastics not only burn quickly, but also release a large amount of heat. It is difficult to extinguish itself during the combustion process. At the same time, thick smoke billows, which accelerates the spread of the fire, greatly threatening the safety of personnel and public property, and posing a risk to social stability and security that cannot be ignored. Therefore, improving the high temperature resistance and flame retardancy of nylon engineering plastics has become an important direction of current material science research. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a high temperature resistant nylon engineering plastic and a preparation method thereof.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A high temperature resistant nylon engineering plastic, comprising the following raw materials in parts by weight: 80-120 parts of nylon resin, 4-6 parts of inorganic filler, 4-6 parts of glass fiber, 2-10 parts of heat resistant modifier, 1-2 parts of coupling agent, 1-3 parts of polyethylene wax, 0.5-1.5 parts of antioxidant, and 1-2 parts of flame retardant;

[0007] The inorganic filler is mullite powder;

[0008] The coupling agent is butyl titanate;

[0009] The antioxidant is 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene.

[0010] The heat-resistant modifier is prepared by the following method:

[0011] Step A1: maleic anhydride, toluene and 1-(2,5-diaminophenyl)ethanone are mixed, stirred for reaction for 30 minutes, and then cyanuric chloride and tetrahydrofuran are added. After continuous stirring for 5 minutes in an ice-water bath, triethylamine is added, and the mixture is reacted for 10 minutes. The mixture is washed, dried, filtered, and rotary evaporated to obtain intermediate 1.

[0012] Further, the usage ratio of maleic anhydride, toluene, 1-(2,5-diaminophenyl)ethanone, cyanuric chloride, tetrahydrofuran, and triethylamine is 4.87-5.76 g: 40-50 mL: 2 g: 3.06-4.01 g: 10 mL: 3.12-4.58 g;

[0013] Step A2: 4-hydroxybenzyl sulfone, acryloyl chloride and tetrabutylammonium bromide were mixed, stirred for 20 min, heated to 80°C for reaction for 1 h, and after the temperature dropped to room temperature, washed, rotary evaporated, and dried at 60°C to obtain intermediate product 2;

[0014] Further, the mass ratio of 4-hydroxybenzyl sulfone, acryloyl chloride and tetrabutylammonium bromide is 1-2g:1.5-3g:0.001g;

[0015] Step A3: Disperse the intermediate product 1 and benzoyl peroxide in xylene, add the intermediate product 2 and tetrahydrofurfuryl acrylate and stir evenly, heat to 90° C. under nitrogen protection for 4.5 hours, distill under reduced pressure, cool, wash, filter, and vacuum dry to obtain a heat-resistant modifier;

[0016] Furthermore, the usage ratio of intermediate product 1, benzoyl peroxide, xylene, intermediate product 2, and tetrahydrofurfuryl acrylate is 3-5g: 0.16g: 70mL: 10-15g: 5-8g.

[0017] The flame retardant is prepared by the following method:

[0018] Step B1: Disperse hypophosphorous acid-d3 evenly in propanol, add 4-vinylaniline and mix, react for 6 hours, add azobisisobutyronitrile, stir at 75°C for 24 hours, wash, filter, and dry at 120°C for 24 hours to obtain a pre-product;

[0019] Further, the dosage ratio of hypophosphorous acid-d3, propanol, 4-vinylaniline, and azobisisobutyronitrile is 52.8-60.1 g: 255 mL: 34.47-38.53 g: 3.60 g;

[0020] Step B2: Mix melamine, phenylboric acid, pre-product and deionized water, stir and reflux at 90°C for 4 hours, reduce the temperature to 40°C, continue stirring for 3 hours, naturally cool to room temperature, filter, wash, dry, and grind in a ball mill for 5 minutes, and sieve with an 80-mesh sieve plate to obtain a flame retardant;

[0021] Furthermore, the dosage ratio of melamine, phenylboric acid, pre-product and deionized water is 3.2-4.1 g: 1.6-2.0 g: 1-1.5 mol: 150-300 mL.

[0022] A method for preparing high temperature resistant nylon engineering plastics, specifically comprising the following steps:

[0023] S1: weighing raw materials according to weight, and mixing the inorganic filler, glass fiber, and coupling agent uniformly to obtain a mixture;

[0024] S2: Nylon resin, compound, heat-resistant modifier, polyethylene wax, antioxidant and flame retardant are mixed, and then granulated by a twin-screw extruder at 250-270° C. to obtain high-temperature resistant nylon engineering plastics.

[0025] Beneficial effects of the present invention:

[0026] The heat-resistant modifier prepared by the invention comprises the following steps: firstly, maleic anhydride and 1-(2,5-diaminophenyl)ethanone are reacted under the catalysis of cyanuric chloride and triethylamine to form an intermediate product 1; secondly, the hydroxyl group of 4-hydroxyphenyl sulfone is reacted with acryloyl chloride under the catalysis of tetrabutylammonium bromide to form an intermediate product 2; finally, the intermediate product 1 is mixed with xylene, benzoyl peroxide is used as an initiator, and the carbon-carbon double bonds of the intermediate product 1, the intermediate product 2 and tetrahydrofurfuryl acrylate are copolymerized through a free radical polymerization reaction to synthesize the heat-resistant modifier. In the heat-resistant modifier, the carbonyl and maleimide groups of intermediate product 1 have a dipole moment perpendicular to the main axis of the molecular chain, which effectively enhances the interaction between molecules, thereby increasing the glass transition temperature and melting point of the material, thereby increasing the rigidity and heat resistance of the molecular chain; intermediate product 1 carries four strong electron-withdrawing groups, attracting the π electrons of the C=C double bond to form two electron-deficient double bonds, while the benzene ring in intermediate product 2 acts as a strong electron-donating group, making the C=C double bond electron-rich. The two have opposite polarities and are homopolymerized under the initiation of free radicals, forming a close intermolecular interaction and improving the high temperature resistance effect; among them, The sulfone group of intermediate 2, as a powerful electron-withdrawing group, can reduce the electron cloud density of the connected carbon atoms, enhance the thermal stability of the molecule, and give the polymer excellent heat resistance. Through chain extension, it further restricts the movement of the molecular chain and improves heat resistance. In addition, tetrahydrofurfuryl acrylate, with its stable tetrahydrofuran ring and acrylate group, exhibits excellent anti-decomposition ability at high temperatures, enhancing the overall stability of the material. In addition, acrylate can not only effectively resist ultraviolet radiation at high temperatures, effectively prevent thermal deformation, and improve heat resistance, but also has good water resistance, ensuring stable performance in humid or water environments.

[0027] The flame retardant prepared by the present invention is firstly dispersed uniformly in propanol using hypophosphorous acid-d3, and reacts with the double bond of 4-vinylaniline under the action of initiator azobisisobutyronitrile to form a pre-product; and then the hydroxyl of phenylboronic acid is used to condense with melamine and the amino group in the pre-product to form a flame retardant. Boron and nitrogen in the flame retardant act synergistically, and the nitrogen element is converted into an inert gas during combustion, effectively diluting oxygen and combustible gas, and reducing the combustion intensity; the boron-based component is heated and dehydrated at the initial stage of combustion, accelerating carbonization, forming a glass-like protective layer, and preventing the spread of combustion, and the aromatic boric acid group contained in it forms a boron oxygen network structure after being heated, and is further converted into a high-stability BOC carbon layer at high temperature, and at the same time, the non-combustible gas is released to play a foaming role, expand the carbon layer, form an effective heat-insulating and oxygen-isolating barrier, and significantly improve the flame retardant performance; in addition, the combined use of boron and phosphorus not only enhances the hydrolysis stability of the flame retardant, but also improves the flame retardant efficiency through synergistic action, and effectively reduces the generation of smoke.

[0028] The high temperature resistant nylon engineering plastic prepared by the present invention not only has good high temperature resistance and water resistance, but also has excellent flame retardant properties. It can effectively resist the influence of high temperature environment on the material and extend the service life of the material. In addition, it can effectively reduce the possibility of fire and provide users with safer protection. With the integration of glass fiber, the heat resistance of the high temperature resistant nylon engineering plastic is further improved, ensuring stable performance in a wider range of high temperature application scenarios. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0030] A method for preparing high temperature resistant nylon engineering plastics, specifically comprising the following steps:

[0031] S1: Weigh the raw materials by weight, including 80 parts of nylon resin, 4 parts of inorganic filler, 4 parts of glass fiber, 2 parts of heat-resistant modifier (prepared in this example), 1 part of coupling agent, 1 part of polyethylene wax, 0.5 parts of antioxidant, and 1 part of flame retardant (prepared in this example), and mix the mullite powder, glass fiber, and butyl titanate evenly to obtain a mixture;

[0032] S2: mixing nylon resin, mixed material, heat-resistant modifier, polyethylene wax, 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene and flame retardant, and then granulating through a twin-screw extruder at 250° C. to obtain high-temperature resistant nylon engineering plastics;

[0033] The heat-resistant modifier is prepared by the following method:

[0034] Step A1: 4.87 g of maleic anhydride, 40 mL of toluene and 2 g of 1-(2,5-diaminophenyl)ethanone were mixed, stirred for reaction for 30 min, and then 3.06 g of cyanuric chloride and 10 mL of tetrahydrofuran were added. After continuous stirring for 5 min in an ice-water bath, 3.12 g of triethylamine was added, and the mixture was reacted for 10 min. The mixture was washed, dried, filtered, and rotary evaporated to obtain intermediate 1.

[0035] Step A2: 1 g of 4-hydroxyphenyl sulfone, 1.5 g of acryloyl chloride and 0.001 g of tetrabutylammonium bromide were mixed, stirred for 20 min, heated to 80°C for reaction for 1 h, and after the temperature dropped to room temperature, washed, rotary evaporated, and dried at 60°C to obtain intermediate product 2;

[0036] Step A3: Disperse 3 g of intermediate product 1 and 0.16 g of benzoyl peroxide in 70 mL of xylene, add 10 g of intermediate product 2 and 5-8 g of tetrahydrofurfuryl acrylate and stir evenly, heat to 90° C. under nitrogen protection for reaction for 4.5 h, distill under reduced pressure, cool, wash, filter, and vacuum dry to obtain a heat-resistant modifier;

[0037] The flame retardant is prepared by the following method:

[0038] Step B1: Disperse 52.8 g of hypophosphorous acid-d3 in 255 mL of propanol, add 34.47 g of 4-vinylaniline, mix, react for 6 h, add 3.60 g of azobisisobutyronitrile, stir at 75 ° C for 24 h, wash, filter, and dry at 120 ° C for 24 h to obtain a pre-product;

[0039] Step B2: Mix 3.2 g of melamine, 1.6 g of phenylboric acid, 1 mol of pre-product and 150 mL of deionized water, stir and reflux at 90 ° C for 4 h, reduce the temperature to 40 ° C, continue stirring for 3 h, naturally cool to room temperature, filter, wash, dry, and then put into a ball mill for 5 min, sieve with an 80-mesh sieve plate to obtain a flame retardant. Example

[0040] A method for preparing high temperature resistant nylon engineering plastics, specifically comprising the following steps:

[0041] S1: Weigh the raw materials by weight, including 100 parts of nylon resin, 5 parts of inorganic filler, 5 parts of glass fiber, 6 parts of heat-resistant modifier (prepared in this example), 1.5 parts of coupling agent, 2 parts of polyethylene wax, 1 part of antioxidant, and 1.5 parts of flame retardant (prepared in this example), and mix the mullite powder, glass fiber, and butyl titanate evenly to obtain a mixture;

[0042] S2: mixing nylon resin, mixed material, heat-resistant modifier, polyethylene wax, 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene and flame retardant, and then granulating through a twin-screw extruder at 260° C. to obtain high-temperature resistant nylon engineering plastics;

[0043] The heat-resistant modifier is prepared by the following method:

[0044] Step A1: 5.36 g of maleic anhydride, 45 mL of toluene and 2 g of 1-(2,5-diaminophenyl)ethanone were mixed, stirred for reaction for 30 min, and then 3.53 g of cyanuric chloride and 10 mL of tetrahydrofuran were added. After continuous stirring for 5 min in an ice-water bath, 3.85 g of triethylamine was added, and the mixture was reacted for 10 min. The mixture was washed, dried, filtered, and rotary evaporated to obtain intermediate 1.

[0045] Step A2: 1.5 g 4-hydroxyphenyl sulfone, 2.4 g acryloyl chloride and 0.001 g tetrabutylammonium bromide were mixed, stirred for 20 min, heated to 80°C for reaction for 1 h, and after the temperature dropped to room temperature, washed, rotary evaporated, and dried at 60°C to obtain intermediate product 2;

[0046] Step A3: Disperse 4 g of intermediate product 1 and 0.16 g of benzoyl peroxide in 70 mL of xylene, add 12 g of intermediate product 2 and 6.5 g of tetrahydrofurfuryl acrylate and stir evenly, heat to 90° C. under nitrogen protection for reaction for 4.5 h, distill under reduced pressure, cool, wash, filter, and vacuum dry to obtain a heat-resistant modifier;

[0047] The flame retardant is prepared by the following method:

[0048] Step B1: Disperse 56.2 g of hypophosphorous acid-d3 in 255 mL of propanol, add 36.51 g of 4-vinylaniline, mix, react for 6 h, add 3.60 g of azobisisobutyronitrile, stir at 75 ° C for 24 h, wash, filter, and dry at 120 ° C for 24 h to obtain a pre-product;

[0049] Step B2: Mix 3.6 g of melamine, 1.8 g of phenylboric acid, 1.25 mol of pre-product and 275 mL of deionized water, stir and reflux at 90 ° C for 4 h, reduce the temperature to 40 ° C, continue stirring for 3 h, naturally cool to room temperature, filter, wash, dry, and then put into a ball mill for 5 min, sieve with an 80-mesh sieve plate to obtain a flame retardant. Example

[0050] A method for preparing high temperature resistant nylon engineering plastics, specifically comprising the following steps:

[0051] S1: Weigh the raw materials by weight, including 120 parts of nylon resin, 6 parts of inorganic filler, 6 parts of glass fiber, 10 parts of heat-resistant modifier (prepared in this example), 2 parts of coupling agent, 3 parts of polyethylene wax, 1.5 parts of antioxidant, and 2 parts of flame retardant (prepared in this example), and mix the mullite powder, glass fiber, and butyl titanate evenly to obtain a mixture;

[0052] S2: mixing nylon resin, mixed material, heat-resistant modifier, polyethylene wax, 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene and flame retardant, and then granulating through a twin-screw extruder at 270° C. to obtain high-temperature resistant nylon engineering plastics;

[0053] The heat-resistant modifier is prepared by the following method:

[0054] Step A1: 5.76 g of maleic anhydride, 50 mL of toluene and 2 g of 1-(2,5-diaminophenyl)ethanone were mixed, stirred for reaction for 30 min, and then 4.01 g of cyanuric chloride and 10 mL of tetrahydrofuran were added. After continuous stirring for 5 min in an ice-water bath, 4.58 g of triethylamine was added, and the mixture was reacted for 10 min. The mixture was washed, dried, filtered, and rotary evaporated to obtain intermediate 1.

[0055] Step A2: 2 g 4-hydroxyphenyl sulfone, 3 g acryloyl chloride and 0.001 g tetrabutylammonium bromide were mixed, stirred for 20 min, heated to 80°C for reaction for 1 h, and after the temperature dropped to room temperature, washed, rotary evaporated, and dried at 60°C to obtain intermediate product 2;

[0056] Step A3: Disperse 5 g of intermediate product 1 and 0.16 g of benzoyl peroxide in 70 mL of xylene, add 15 g of intermediate product 2 and 8 g of tetrahydrofurfuryl acrylate and stir evenly, heat to 90° C. under nitrogen protection for reaction for 4.5 h, distill under reduced pressure, cool, wash, filter, and vacuum dry to obtain a heat-resistant modifier;

[0057] The flame retardant is prepared by the following method:

[0058] Step B1: Disperse 60.1 g of hypophosphorous acid-d3 in 255 mL of propanol, add 38.53 g of 4-vinylaniline, mix, react for 6 h, add 3.60 g of azobisisobutyronitrile, stir at 75 ° C for 24 h, wash, filter, and dry at 120 ° C for 24 h to obtain a pre-product;

[0059] Step B2: Mix 4.1 g of melamine, 2.0 g of phenylboric acid, 1.5 mol of pre-product and 300 mL of deionized water, stir and reflux at 90 ° C for 4 h, reduce the temperature to 40 ° C, continue stirring for 3 h, naturally cool to room temperature, filter, wash, dry, and then put into a ball mill for 5 min, sieve with an 80-mesh sieve plate to obtain a flame retardant.

[0060] Comparative Example 1

[0061] This comparative example is a high temperature resistant nylon engineering plastic, which is different from Example 3 in that an equal amount of silicone powder is used to replace the heat resistant modifier prepared in Example 3, and the rest are the same.

[0062] Comparative Example 2

[0063] This comparative example is a high temperature resistant nylon engineering plastic, which is different from Example 3 in that an equal amount of magnesium hydroxide is used to replace the flame retardant prepared in Example 3, and the rest are the same.

[0064] Performance test: The high temperature resistant nylon engineering plastics prepared in Examples 1-3 and Comparative Examples 1-2 were cut into standard test sizes, and the melting temperature was tested according to GB / T 19466.3-2004. The vertical burning performance was tested using the GB / T 2048-1996 plastic combustion performance test method. The water absorption was tested according to GB / T 1034-2008. The thickness of the test piece was 2 mm. The heat deformation temperature was tested according to GB / T1634.2-2004. The glass transition temperature was tested according to GB / T 19466.2-2004. The test results are shown in the following table:

[0065]

[0066] It can be seen from the test data in the table that the high temperature resistant nylon engineering plastic prepared in Example 1 not only has good high temperature resistance and water resistance, but also has a high heat deformation temperature, which can resist the influence of high temperature and humid environment on plastics and extend the service life of the material. It can also be seen from the above table that the high temperature resistant nylon engineering plastic prepared in the present invention has excellent flame retardant effect and reduces the possibility of fire.

[0067] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A method for preparing high temperature resistant nylon engineering plastics, characterized in that: The following steps are involved: S1: uniformly mixing the inorganic filler, glass fiber and coupling agent to obtain a mixture; S2: Mix nylon resin, mixed material, heat-resistant modifier, polyethylene wax, antioxidant and flame retardant, and then granulate them through a twin-screw extruder at 250-270°C to obtain high-temperature resistant nylon engineering plastics; The heat-resistant modifier is prepared by the following method: Step A1: maleic anhydride, toluene and 1-(2,5-diaminophenyl)ethanone are mixed, stirred for reaction for 30 minutes, and then cyanuric chloride and tetrahydrofuran are added. After continuous stirring for 5 minutes in an ice-water bath, triethylamine is added, and the mixture is reacted for 10 minutes. The mixture is washed, dried, filtered, and rotary evaporated to obtain intermediate 1. Step A2: 4-hydroxybenzyl sulfone, acryloyl chloride and tetrabutylammonium bromide were mixed, stirred for 20 min, heated to 80°C for reaction for 1 h, and after the temperature dropped to room temperature, washed, rotary evaporated, and dried at 60°C to obtain intermediate product 2; Step A3: Disperse the intermediate product 1 and benzoyl peroxide evenly in xylene, then add the intermediate product 2 and tetrahydrofurfuryl acrylate and stir evenly, heat to 90°C under nitrogen protection and react for 4.5 hours, distill under reduced pressure, cool, wash, filter and vacuum dry to obtain a heat-resistant modifier.

2. The method for preparing a high temperature resistant nylon engineering plastic according to claim 1, characterized in that: Step A1: The usage ratio of maleic anhydride, toluene, 1-(2,5-diaminophenyl)ethanone, cyanuric chloride, tetrahydrofuran and triethylamine is 4.87-5.76 g: 40-50 mL: 2 g: 3.06-4.01 g: 10 mL: 3.12-4.58 g.

3. The method for preparing a high temperature resistant nylon engineering plastic according to claim 1, characterized in that: In step A2, the mass ratio of 4-hydroxybenzyl sulfone, acryloyl chloride and tetrabutylammonium bromide is 1-2g:1.5-3g:0.001g.

4. The method for preparing a high temperature resistant nylon engineering plastic according to claim 1, characterized in that: The usage ratio of the intermediate product 1, benzoyl peroxide, xylene, the intermediate product 2, and tetrahydrofurfuryl acrylate in step A3 is 3-5 g: 0.16 g: 70 mL: 10-15 g: 5-8 g.

5. The method for preparing a high temperature resistant nylon engineering plastic according to claim 1, characterized in that: The flame retardant is prepared by the following method: Step B1: Disperse hypophosphorous acid-d3 evenly in propanol, add 4-vinylaniline and mix, react for 6 hours, add azobisisobutyronitrile, stir at 75°C for 24 hours, wash, filter, and dry at 120°C for 24 hours to obtain a pre-product; Step B2: Mix melamine, phenylboric acid, pre-product and deionized water, stir and reflux at 90°C for 4 hours, reduce the temperature to 40°C, continue stirring for 3 hours, naturally cool to room temperature, filter, wash, dry, and grind in a ball mill for 5 minutes. Sieve with an 80-mesh sieve to obtain a flame retardant.

6. The method for preparing a high temperature resistant nylon engineering plastic according to claim 5, characterized in that: In step B1, the usage ratio of hypophosphorous acid-d3, propanol, 4-vinylaniline and azobisisobutyronitrile is 52.8-60.1 g: 255 mL: 34.47-38.53 g: 3.60 g.

7. The method for preparing a high temperature resistant nylon engineering plastic according to claim 5, characterized in that: In step B2, the dosage ratio of melamine, phenylboric acid, pre-product and deionized water is 3.2-4.1 g: 1.6-2.0 g: 1-1.5 mol: 150-300 mL.

8. The method for preparing a high temperature resistant nylon engineering plastic according to claim 1, characterized in that: The inorganic filler is mullite powder, the coupling agent is butyl titanate, and the antioxidant is 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene.

9. A high temperature resistant nylon engineering plastic, characterized in that: Prepared according to the preparation method according to any one of claims 1 to 8.

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