A high temperature resistant hot melt adhesive and its application in air filter material

Abstract

The present invention belongs to the technical field of hot melt adhesives, and discloses a high temperature resistant hot melt adhesive and its application in air filtration filter material, wherein the high temperature resistant hot melt adhesive comprises 100 parts by weight of EVA resin, 5-25 parts by weight of amino bismaleimide cross-linked polystyrene, 1.2-7 parts by weight of maleic anhydride grafted EVA compatibilizer, 6-10 parts by weight of plasticizer, 20-30 parts by weight of lubricant, 0.6-0.8 parts by weight of antioxidant, 25-32 parts by weight of tackifier; the anhydride group of maleic anhydride grafted EVA compatibilizer can react with the amino group of cross-linked polystyrene, thereby enhancing the compatibility between cross-linked polystyrene and EVA resin, making cross-linked polystyrene particles uniformly dispersed in the hot melt adhesive matrix, improving the tensile strength and elongation at break of the EVA hot melt adhesive, and high temperature resistance. There are better practical applications in air filtration filter materials and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of hot melt adhesives, in particular to a high temperature resistant hot melt adhesive and its application in air filter materials. Background Art

[0002] Hot melt adhesive is a plastic adhesive. Its physical state changes with temperature within a certain temperature range, while its chemical properties remain unchanged. Among them, ethylene vinyl acetate EVA hot melt adhesive has the advantages of high bonding strength and fast curing speed, and is widely used in air filters, fabrics, book binding, furniture equipment, etc. However, EVA hot melt adhesive has poor heat resistance. At high temperatures, EVA hot melt adhesive is easy to thermally decompose, and its strength and bonding properties will be greatly affected. Therefore, it is necessary to improve the high temperature resistance, mechanical strength, toughness and other properties of EVA hot melt adhesive.

[0003] Polystyrene and its copolymers have good mechanical strength, heat resistance and other properties. They can be used as additives and are widely used in plastics, fibers, adhesives, etc. The patent with publication number CN118063953A discloses a method for preparing a highly elastic modified polyurethane material. The piperazine-s-triazine-based cross-linked polystyrene obtained by cross-linking and polymerizing styrene-based piperazine-s-triazine and styrene can improve the elastic modulus, compression strength, thermal decomposition temperature and other properties of polyurethane materials. The patent with announcement number CN105802210B discloses polystyrene organic rigid particle modified nylon filaments for 3D printing and a preparation method thereof. Nylon, polystyrene organic rigid particles, etc. are used as raw materials, and the obtained nylon filaments have good dimensional stability, anti-warping properties and other properties. Summary of the invention

[0004] The invention solves the problems that the EVA hot melt adhesive has poor high temperature resistance and low mechanical strength.

[0005] Technical solution: A high temperature resistant hot melt adhesive, comprising 100 parts by weight of EVA resin, 5-25 parts by weight of amino bismaleimide cross-linked polystyrene, 1.2-7 parts by weight of maleic anhydride grafted EVA compatibilizer, 6-10 parts by weight of plasticizer, 20-30 parts by weight of lubricant, 0.6-0.8 parts by weight of antioxidant, and 25-32 parts by weight of tackifier.

[0006] Furthermore, the plasticizer is dioctyl phthalate; and the antioxidant is antioxidant 1010.

[0007] Furthermore, the lubricant is paraffin wax, microcrystalline wax or polyethylene wax.

[0008] Furthermore, the tackifier is petroleum resin or terpene resin.

[0009] The preparation method of amino bismaleimide cross-linked polystyrene is:

[0010] Step A, add styrene, 2-(4-nitroaniline)-4,6-maleimide-1,3,5-triazine, emulsifier, polyvinyl pyrrolidone into water, stir and mix, then add azobisisobutyronitrile dropwise, stir at 60-75° C. for 18-24 hours, place the product in a Soxhlet extractor, extract with dichloromethane, acetone, and methanol respectively, and dry to obtain bismaleimide cross-linked polystyrene.

[0011] Step B, add bismaleimide cross-linked polystyrene to N,N-dimethylformamide, stir and mix, then add hydrochloric acid solution and iron powder, stir and react at 80-110° C. for 12-24 hours, add sodium hydroxide to neutralize the solution to pH 7, filter, wash with water, and dry to obtain amino bismaleimide cross-linked polystyrene.

[0012] Furthermore, in step A, the mass ratio of styrene, 2-(4-nitroaniline)-4,6-maleimide-1,3,5-triazine, emulsifier, polyvinyl pyrrolidone, and azobisisobutyronitrile is 100:(10-35):(2.5-3.2):(4-7):(2-3).

[0013] Furthermore, the emulsifier is Span 80 or OP-10.

[0014] Furthermore, in step B, the ratio of bismaleimide cross-linked polystyrene, hydrochloric acid solution, and iron powder is 100 g:(2-5) L:(250-600) g.

[0015] Furthermore, the mass fraction of the hydrochloric acid solution is 32-37%.

[0016] Further, the preparation method of 2-(4-nitroaniline)-4,6-maleimide-1,3,5-triazine is:

[0017] Step (1), adding water to 1,4-dioxane in a molar ratio of 1:(1-1.3):(1-1.3) 2-chloro-4,6-diamino-1,3,5-triazine, 4-nitroaniline, and sodium bicarbonate, reacting at 75-90° C. for 12-24 hours, concentrating under reduced pressure to precipitate a precipitate, filtering, washing with water, and drying to obtain 2-(4-nitroaniline)-4,6-diamino-1,3,5-triazine.

[0018] Step (2), adding 2-(4-nitroaniline)-4,6-diamino-1,3,5-triazine and maleic anhydride in a molar ratio of 1:(2-2.2) to N,N-dimethylformamide, stirring and reacting for 1-2 hours, then adding acetic anhydride and sodium acetate, stirring and reacting at 60-70° C. for 2-4 hours, adding water to dilute, extracting with ethyl acetate, distilling the ethyl acetate organic phase under reduced pressure, washing with acetone, and then recrystallizing from ethyl acetate to obtain 2-(4-nitroaniline)-4,6-maleimide-1,3,5-triazine.

[0019] Furthermore, high temperature resistant hot melt adhesive is used in air filtration materials.

[0020] Technical effect: The present invention utilizes styrene and 2-(4-nitroaniline)-4,6-maleimide-1,3,5-triazine to carry out cross-linking polymerization reaction, and then reduces the nitro group through Fe / HCl to obtain amino-bismaleimide cross-linked polystyrene.

[0021] The present invention uses EVA resin as the main agent of hot melt adhesive, petroleum resin and the like as tackifiers, paraffin, dioctyl phthalate and the like as additives, amino bismaleimide cross-linked polystyrene as a filling modifier, maleic anhydride grafted EVA as a compatibilizer, and obtains a high temperature resistant hot melt adhesive after high temperature mixing. The cross-linked polystyrene contains a rigid maleimide group, and the cross-linked polystyrene has the characteristics of high strength and high toughness. The anhydride group of the added maleic anhydride grafted EVA compatibilizer can react with the amino group of the cross-linked polystyrene, thereby enhancing the compatibility between the cross-linked polystyrene and the EVA resin, so that the cross-linked polystyrene particles are evenly dispersed in the hot melt adhesive matrix. When the hot melt adhesive matrix material is subjected to stress and deformed, the cross-linked polystyrene can yield to absorb and dissipate energy, thereby playing a good toughening role and improving the tensile strength and elongation at break of the EVA hot melt adhesive.

[0022] Cross-linked polystyrene contains high temperature resistant phenyltriazine maleimide groups, which are evenly dispersed in the EVA hot melt adhesive matrix, which can increase the 5% mass loss temperature and the maximum thermal decomposition rate of the hot melt adhesive, and improve the high temperature resistance of the hot melt adhesive. At the same time, cross-linked polystyrene contains a large number of triazine functional groups, which produce non-flammable gases such as nitrogen during pyrolysis during combustion, which can dilute the oxygen concentration, inhibit the combustion process, and help improve the limiting oxygen index and flame retardant properties. It has better practical applications in air filtration materials and other aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the reaction formula for preparing 2-(4-nitroaniline)-4,6-maleimide-1,3,5-triazine.

[0024] Figure 2This is the reaction formula for preparing amino bismaleimide cross-linked polystyrene. DETAILED DESCRIPTION

[0025] 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.

[0026] EVA resin brand VA910, Shanghai Juyilong Plastics. Maleic anhydride grafted EVA compatibilizer brand E418, Shanghai Juyilong Plastics. Petroleum resin brand Wingtack 90, Guangzhou Shanshan New Materials. Microcrystalline wax model DNW-160S, Foshan Jieke New Materials.

[0027] Example 1

[0028] (1) Add 60 mL of water, 7 mmol of 2-chloro-4,6-diamino-1,3,5-triazine (CAS No. 3397-62-4), 9.1 mmol of 4-nitroaniline (CAS No. 100-01-6), and 9.1 mmol of sodium bicarbonate to 70 mL of 1,4-dioxane, react at 75°C for 24 h, concentrate under reduced pressure to precipitate, filter, wash with water, and dry to obtain 2-(4-nitroaniline)-4,6-diamino-1,3,5-triazine.

[0029] (2) Add 8 mmol 2-(4-nitroaniline)-4,6-diamino-1,3,5-triazine and 16 mmol maleic anhydride to 20 mL N,N-dimethylformamide, stir and react for 2 h, then add 3.2 mL acetic anhydride and 1.5 g sodium acetate, stir and react at 70 ° C for 2 h, add water to dilute, extract with ethyl acetate, distill the ethyl acetate organic phase under reduced pressure, wash with acetone, and then recrystallize from ethyl acetate to obtain 2-(4-nitroaniline)-4,6-maleimide-1,3,5-triazine.

[0030] (3) Add 10 g of styrene, 2.2 g of 2-(4-nitroaniline)-4,6-maleimide-1,3,5-triazine, 0.3 g of emulsifier OP-10, and 0.7 g of polyvinyl pyrrolidone to 150 mL of water, stir and mix, then add dropwise 0.26 g of azobisisobutyronitrile, stir at 75 ° C for 18 h, place the product in a Soxhlet extractor, extract with dichloromethane, acetone, and methanol respectively, and dry to obtain bismaleimide cross-linked polystyrene.

[0031] (4) Add 10 g of bismaleimide cross-linked polystyrene to 200 mL of N,N-dimethylformamide, stir and mix, then add 200 mL of 37% hydrochloric acid solution and 25 g of iron powder, stir and react at 90° C. for 12 h, add sodium hydroxide to neutralize the solution to pH 7, filter, wash with water, and dry to obtain amino-bismaleimide cross-linked polystyrene.

[0032] (5) Add 100 g EVA resin, 5 g amino bismaleimide cross-linked polystyrene, 1.2 g maleic anhydride grafted EVA compatibilizer, 6 g plasticizer dioctyl phthalate, 20 g lubricant paraffin, 0.6 g antioxidant 1010, and 32 g tackifier petroleum resin into a reactor, stir and mix at 130°C for 20 min, pour into a mold and solidify to obtain a high temperature resistant hot melt adhesive.

[0033] Example 2

[0034] (1) Add 50 mL of water, 7 mmol of 2-chloro-4,6-diamino-1,3,5-triazine, 7 mmol of 4-nitroaniline, and 7 mmol of sodium bicarbonate to 60 mL of 1,4-dioxane, react at 90°C for 12 h, concentrate under reduced pressure to precipitate, filter, wash with water, and dry to obtain 2-(4-nitroaniline)-4,6-diamino-1,3,5-triazine.

[0035] (2) Add 8 mmol 2-(4-nitroaniline)-4,6-diamino-1,3,5-triazine and 17.6 mmol maleic anhydride to 25 mL N,N-dimethylformamide, stir and react for 1 hour, then add 3 mL acetic anhydride and 1.7 g sodium acetate, stir and react at 60°C for 4 hours, add water to dilute, extract with ethyl acetate, distill the ethyl acetate organic phase under reduced pressure, wash with acetone, and then recrystallize from ethyl acetate to obtain 2-(4-nitroaniline)-4,6-maleimide-1,3,5-triazine.

[0036] (3) Add 10 g of styrene, 1 g of 2-(4-nitroaniline)-4,6-maleimide-1,3,5-triazine, 0.25 g of emulsifier Span 80, and 0.4 g of polyvinyl pyrrolidone to 120 mL of water, stir to mix, then add 0.2 g of azobisisobutyronitrile dropwise, stir at 75 ° C for 24 h, place the product in a Soxhlet extractor, extract with dichloromethane, acetone, and methanol respectively, and dry to obtain bismaleimide cross-linked polystyrene.

[0037] (4) Add 10 g of bismaleimide cross-linked polystyrene to 300 mL of N,N-dimethylformamide, stir and mix, then add 300 mL of 37% hydrochloric acid solution and 40 g of iron powder, stir and react at 80° C. for 24 h, add sodium hydroxide to neutralize the solution to pH 7, filter, wash with water, and dry to obtain amino-bismaleimide cross-linked polystyrene.

[0038] (5) Add 100 g EVA resin, 5 g amino bismaleimide cross-linked polystyrene, 1.2 g maleic anhydride grafted EVA compatibilizer, 6 g plasticizer dioctyl phthalate, 30 g lubricant microcrystalline wax, 0.8 g antioxidant 1010, and 30 g tackifier terpene resin into a reactor, stir and mix at 130° C. for 20 min, pour into a mold and solidify to obtain a high temperature resistant hot melt adhesive.

[0039] Example 3

[0040] (1) Add 10 g of styrene, 3.5 g of 2-(4-nitroaniline)-4,6-maleimide-1,3,5-triazine (prepared according to the method of Example 1), 0.32 g of emulsifier OP-10, and 0.6 g of polyvinyl pyrrolidone to 150 mL of water, stir and mix, then add dropwise 0.3 g of azobisisobutyronitrile, stir at 60° C. for 24 h, place the product in a Soxhlet extractor, extract with dichloromethane, acetone, and methanol, respectively, and dry to obtain bismaleimide cross-linked polystyrene.

[0041] (2) Add 10 g of bismaleimide cross-linked polystyrene to 300 mL of N,N-dimethylformamide, stir and mix, then add 500 mL of 32% hydrochloric acid solution and 60 g of iron powder, stir and react at 110° C. for 12 h, add sodium hydroxide to neutralize the solution to pH 7, filter, wash with water, and dry to obtain amino-bismaleimide cross-linked polystyrene.

[0042] (3) Add 100 g EVA resin, 5 g amino bismaleimide cross-linked polystyrene, 1.2 g maleic anhydride grafted EVA compatibilizer, 10 g plasticizer dioctyl phthalate, 24 g lubricant polyethylene wax, 0.8 g antioxidant 1010, and 25 g tackifier petroleum resin into a reactor, stir and mix at 130°C for 20 min, pour into a mold and solidify to obtain a high temperature resistant hot melt adhesive.

[0043] Comparative Example 1

[0044] (1) Add 100 g EVA resin, 1.2 g maleic anhydride grafted EVA compatibilizer, 6 g plasticizer dioctyl phthalate, 20 g lubricant paraffin, 0.6 g antioxidant 1010, and 32 g tackifier petroleum resin into a reactor, stir and mix at 130°C for 20 min, pour into a mold for curing and forming, and obtain a high temperature resistant hot melt adhesive.

[0045] Comparative Example 2

[0046] (1) Add 100 g of EVA resin, 5 g of amino-bismaleimide cross-linked polystyrene (prepared according to the method of Example 1), 6 g of plasticizer dioctyl phthalate, 20 g of lubricant paraffin, 0.6 g of antioxidant 1010, and 32 g of tackifier petroleum resin into a reactor, stir and mix at 130° C. for 20 min, pour into a mold and solidify to obtain a high-temperature resistant hot melt adhesive.

[0047] Comparative Example 3

[0048] (1) 100 g of EVA resin, 5 g of bismaleimide cross-linked polystyrene (prepared according to the method of Example 1), 1.2 g of maleic anhydride grafted EVA compatibilizer, 6 g of plasticizer dioctyl phthalate, 20 g of lubricant paraffin, 0.6 g of antioxidant 1010, and 32 g of tackifier petroleum resin were added to a reactor, stirred and mixed at 130° C. for 20 min, poured into a mold for curing and molding, and a high temperature resistant hot melt adhesive was obtained.

[0049] Comparative Example 4

[0050] (1) Add 10 g of styrene, 2.2 g of 4,4'-bismaleimide diphenylmethane (CAS No. 13676-54-5), 0.3 g of emulsifier OP-10, and 0.7 g of polyvinyl pyrrolidone to 150 mL of water, stir and mix, then add 0.26 g of azobisisobutyronitrile dropwise, stir at 75°C for 18 h, place the product in a Soxhlet extractor, extract with dichloromethane, acetone, and methanol, respectively, and dry to obtain bismaleimide cross-linked polystyrene.

[0051] (2) Add 100 g of EVA resin, 5 g of bismaleimide cross-linked polystyrene, 1.2 g of maleic anhydride grafted EVA compatibilizer, 6 g of plasticizer dioctyl phthalate, 20 g of lubricant paraffin, 0.6 g of antioxidant 1010, and 32 g of tackifier petroleum resin into a reactor, stir and mix at 130° C. for 20 min to obtain a high temperature resistant hot melt adhesive.

[0052] The high-temperature resistant hot melt adhesive after stirring and kneading is poured into a mold for curing and forming to make a dumbbell-shaped specimen. The tensile properties are tested using an electronic tensile testing machine according to the GB / T 1040.1-2018 method.

[0053] The hot melt adhesive was placed in a thermogravimetric analyzer for thermal performance testing. The test atmosphere was nitrogen, the test temperature was 30-800°C, and the heating rate was 10°C / min.

[0054] The limiting oxygen index of hot melt adhesive cured product was tested according to GB / T 2406.1-2008 method.

[0055] The test results are shown in Table 1.

[0056] Table 1 High temperature resistant hot melt adhesive performance test

[0057]

[0058] As shown in Table 1, the EVA hot melt adhesives of Examples 1, 2, and 3 are all added with amino bismaleimide cross-linked polystyrene, and the cross-linked polystyrene contains rigid maleimide groups. At the same time, the cross-linked polystyrene particles have the characteristics of high strength and high toughness, and the anhydride groups of the added maleic anhydride grafted EVA compatibilizer can react with the amino groups of the cross-linked polystyrene, thereby enhancing the compatibility between the cross-linked polystyrene and the EVA resin, so that the cross-linked polystyrene particles are evenly dispersed in the hot melt adhesive matrix. When the hot melt adhesive matrix material is deformed by stress, the cross-linked polystyrene can yield to absorb and dissipate energy, thereby playing a good toughening role and improving the tensile strength and elongation at break of the EVA hot melt adhesive.

[0059] Cross-linked polystyrene containing high temperature resistant phenyltriazine maleimide groups Evenly dispersed in the EVA hot melt adhesive matrix, it can improve the T 5％ (5% mass loss temperature) and T max (Temperature at maximum thermal decomposition rate), improves the high temperature resistance of hot melt adhesive. At the same time, cross-linked polystyrene contains a large number of triazine functional groups, which produce non-flammable gases such as nitrogen during pyrolysis during combustion, which can dilute the oxygen concentration and inhibit the combustion process, which is beneficial to improve the limiting oxygen index and flame retardant properties.

[0060] Compared with Example 1, in Comparative Example 1, no amino-bismaleimide cross-linked polystyrene was added, and the tensile strength and elongation at break of the EVA hot melt adhesive were lower, and the mechanical properties were poor. 5％ , T max The limiting oxygen index is low, and the high temperature resistance and flame retardant properties are poor.

[0061] In Comparative Example 2, no maleic anhydride grafted EVA was added, and the compatibility of the amino-bismaleimide cross-linked polystyrene with the EVA resin was poor, and it could not be effectively dispersed in the hot melt adhesive matrix, and the toughening effect was poor. The tensile strength and elongation at break of the hot melt adhesive were lower than those of Example 1. However, the amino-bismaleimide cross-linked polystyrene contained phenyltriazine maleimide groups, which could improve the high temperature resistance and flame retardancy of the hot melt adhesive. 5％ , T max And the limiting oxygen index is significantly higher than that of comparative example 1.

[0062] The bismaleimide cross-linked polystyrene added in Comparative Example 3 does not contain an amino group and cannot react with the anhydride group of the maleic anhydride grafted EVA, resulting in the maleic anhydride grafted EVA failing to increase the volume and improving the compatibility between the bismaleimide cross-linked polystyrene and the EVA resin. The toughening effect is poor, and the tensile strength and elongation at break of the hot melt adhesive are lower than those of Example 1. However, T 5％ , T max And the limiting oxygen index is significantly higher than that of comparative example 1.

[0063] Comparative Example 4 uses 4,4'-bismaleimide diphenylmethane and styrene for crosslinking reaction, and the obtained bismaleimide crosslinked polystyrene does not contain amino groups, maleic anhydride grafted EVA cannot play a role in volume expansion, cannot improve the compatibility between bismaleimide crosslinked polystyrene and EVA resin, and has poor toughening effect. The tensile strength and elongation at break of the hot melt adhesive are lower than those of Example 1. It also does not contain triazine groups, and does not produce a large amount of non-combustible gases such as nitrogen during combustion and pyrolysis, and cannot effectively improve the limiting oxygen index and flame retardant properties.

[0064] Example 4

[0065] 100 g of EVA resin, 10 g of amino-bismaleimide cross-linked polystyrene (prepared according to the method of Example 1), 2.5 g of maleic anhydride grafted EVA compatibilizer, 6 g of plasticizer dioctyl phthalate, 20 g of lubricant paraffin, 0.6 g of antioxidant 1010, and 32 g of tackifier petroleum resin were added to a reactor, stirred and mixed at 130° C. for 20 min, poured into a mold for curing and forming, and a high temperature resistant hot melt adhesive was obtained.

[0066] Example 5

[0067] 100 g of EVA resin, 15 g of amino-bismaleimide cross-linked polystyrene (prepared according to the method of Example 1), 4.2 g of maleic anhydride grafted EVA compatibilizer, 6 g of plasticizer dioctyl phthalate, 20 g of lubricant paraffin, 0.6 g of antioxidant 1010, and 32 g of tackifier petroleum resin were added to a reactor, stirred and mixed at 130° C. for 20 min, poured into a mold for curing and forming, and a high temperature resistant hot melt adhesive was obtained.

[0068] Example 6

[0069] 100 g of EVA resin, 20 g of amino-bismaleimide cross-linked polystyrene (prepared according to the method of Example 1), 5.7 g of maleic anhydride grafted EVA compatibilizer, 6 g of plasticizer dioctyl phthalate, 20 g of lubricant paraffin, 0.6 g of antioxidant 1010, and 32 g of tackifier petroleum resin were added to a reactor, stirred and mixed at 130° C. for 20 min, poured into a mold for curing and forming, and a high temperature resistant hot melt adhesive was obtained.

[0070] Example 7

[0071] 100 g of EVA resin, 25 g of amino-bismaleimide cross-linked polystyrene (prepared according to the method of Example 1), 7 g of maleic anhydride grafted EVA compatibilizer, 6 g of plasticizer dioctyl phthalate, 20 g of lubricant paraffin, 0.6 g of antioxidant 1010, and 32 g of tackifier petroleum resin were added to a reactor, stirred and mixed at 130° C. for 20 min, poured into a mold for curing and molding, and a high temperature resistant hot melt adhesive was obtained.

[0072] The tensile properties, thermal properties and flame retardant properties of the hot melt adhesive cured product were tested according to the above method.

[0073] The test results are shown in Table 2.

[0074] Table 2 High temperature resistant hot melt adhesive performance test

[0075]

[0076]

[0077] As shown in Table 2, the amino bismaleimide cross-linked polystyrene maleic anhydride grafted EVA compatibilizer and EVA hot melt adhesive at different dosages all exhibit good tensile properties, high temperature resistance and flame retardant properties.

[0078] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, a person skilled in the art may make non-creative modifications to the present embodiment as needed, and such modifications shall be protected by the patent law as long as they are within the scope of protection claimed in the present application.

Claims

1. A high temperature resistant hot melt adhesive, characterized in that: The high temperature resistant hot melt adhesive comprises 100 parts by weight of EVA resin, 5-25 parts by weight of amino bismaleimide cross-linked polystyrene, 1.2-7 parts by weight of maleic anhydride grafted EVA compatibilizer, 6-10 parts by weight of plasticizer, 20-30 parts by weight of lubricant, 0.6-0.8 parts by weight of antioxidant, and 25-32 parts by weight of tackifier; The preparation method of the amino bismaleimide cross-linked polystyrene is: Step A, adding styrene, 2-(4-nitroaniline)-4,6-maleimide-1,3,5-triazine, an emulsifier, and polyvinyl pyrrolidone to water, stirring and mixing, then adding azobisisobutyronitrile dropwise, stirring at 60-75° C. for 18-24 hours, placing the product in a Soxhlet extractor, extracting with dichloromethane, acetone, and methanol respectively, and drying to obtain bismaleimide cross-linked polystyrene; Step B, adding bismaleimide cross-linked polystyrene to N,N-dimethylformamide, stirring and mixing, adding hydrochloric acid solution and iron powder, stirring and reacting at 80-110° C. for 12-24 hours, adding sodium hydroxide to neutralize the solution to pH 7, filtering, washing with water, and drying to obtain amino-bismaleimide cross-linked polystyrene; In the step A, the mass ratio of styrene, 2-(4-nitroaniline)-4,6-maleimide-1,3,5-triazine, emulsifier, polyvinyl pyrrolidone, and azobisisobutyronitrile is 100:(10-35):(2.5-3.2):(4-7):(2-3); In the step B, the usage ratio of bismaleimide cross-linked polystyrene, hydrochloric acid solution and iron powder is 100g:(2-5)L:(250-600)g.

2. The high temperature resistant hot melt adhesive according to claim 1, characterized in that: The emulsifier is Span 80 or OP-10.

3. The high temperature resistant hot melt adhesive according to claim 1, characterized in that: The mass fraction of the hydrochloric acid solution is 32-37%.

4. The high temperature resistant hot melt adhesive according to claim 1, characterized in that: The preparation method of the 2-(4-nitroaniline)-4,6-maleimide-1,3,5-triazine is: Step (1), adding water to 1,4-dioxane in a molar ratio of 1:(1-1.3):(1-1.3)2-chloro-4,6-diamino-1,3,5-triazine, 4-nitroaniline, and sodium bicarbonate, reacting at 75-90° C. for 12-24 hours, concentrating under reduced pressure to precipitate a precipitate, filtering, washing with water, and drying to obtain 2-(4-nitroaniline)-4,6-diamino-1,3,5-triazine; Step (2), adding 2-(4-nitroaniline)-4,6-diamino-1,3,5-triazine and maleic anhydride in a molar ratio of 1:(2-2.2) to N,N-dimethylformamide, stirring and reacting for 1-2 hours, then adding acetic anhydride and sodium acetate, stirring and reacting at 60-70° C. for 2-4 hours, adding water to dilute, extracting with ethyl acetate, distilling the ethyl acetate organic phase under reduced pressure, washing with acetone, and then recrystallizing from ethyl acetate to obtain 2-(4-nitroaniline)-4,6-maleimide-1,3,5-triazine.

5. The high temperature resistant hot melt adhesive according to claim 1, characterized in that: The plasticizer is dioctyl phthalate; the antioxidant is antioxidant 1010.

6. The high temperature resistant hot melt adhesive according to claim 1, characterized in that: The lubricant is paraffin wax, microcrystalline wax or polyethylene wax.

7. The high temperature resistant hot melt adhesive according to claim 1, characterized in that: The tackifier is petroleum resin or terpene resin.

8. Use of the high temperature resistant hot melt adhesive as claimed in any one of claims 1 to 7 in air filter materials.

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