Environment-friendly adhesive film material and preparation method thereof

Abstract

The application belongs to the technical field of bonding materials, and particularly relates to an environment-friendly adhesive film material and a preparation method thereof. The adhesive film material comprises the following raw materials in parts by weight: 40-60 parts of ethylene-propylene-diene rubber, 20-30 parts of butadiene styrene rubber, 10-20 parts of natural rubber, 10-30 parts of reinforcing agent, 10-15 parts of dynamic crosslinking agent, 3-8 parts of maleic anhydride, 5-15 parts of butyl acrylate, 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of fluorine-containing polysiloxane and 0.5-1.5 parts of peroxide. The adhesive film material can realize high-strength bonding of the rubber outsole and the EVA insole by introducing a specific crosslinking agent with a triazine ring and a dynamic disulfide bond (S-S) structure and fluorine-containing polysiloxane into an ethylene-propylene-diene rubber / butadiene styrene rubber / natural rubber matrix, and meanwhile, the adhesive film material has excellent wet heat aging resistance, high temperature resistance and bending resistance.

Description

Technical Field

[0001] This invention belongs to the field of adhesive materials technology, specifically relating to an environmentally friendly adhesive film material and its preparation method. Background Technology

[0002] As the footwear industry increasingly demands environmentally friendly and efficient production, traditional solvent-based adhesives are gradually being replaced by hot melt adhesive films due to issues such as VOC emissions and cumbersome processes. Hot melt adhesive films offer advantages such as being solvent-free, ready to use, and suitable for automated production, making them the mainstream method for bonding rubber outsoles to EVA midsoles.

[0003] Currently, several patents disclose hot melt adhesive film technologies for shoe sole bonding. For example, CN111004584A discloses a cross-linked adhesive film composed of EVA, maleic anhydride-grafted SBS rubber, and BIBP cross-linking agent, which improves adhesion strength and resistance to damp heat through free radical cross-linking during molding. However, this system relies on the EVA matrix and has limited wettability and chemical bonding ability to non-polar rubber outsoles, and still suffers from interfacial weakening under long-term damp heat conditions. CN116285764A proposes an EVA hot melt adhesive film that improves adhesion retention at high temperatures by adding fumed silica and specific tackifying resins. Although this technology improves high-temperature stability, it is still mainly based on EVA and lacks sufficient chemical bonding at the rubber interface. CN115181518A uses polyethylene grafted with hydroxyethyl acrylate and SBS, and adds BPO to initiate crosslinking. It does not delaminate at 80 °C. However, this system still has problems with insufficient water resistance and poor interfacial polarity matching, making it difficult to meet the long-term bonding stability under high humidity and high heat environments.

[0004] Therefore, there is an urgent need to develop a new type of environmentally friendly adhesive film material that can achieve high-strength bonding between rubber and EVA, has excellent resistance to damp heat aging and high temperature, and is suitable for automated production lines to achieve green manufacturing. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the primary objective of this invention is to provide an environmentally friendly adhesive film material that can achieve high-strength bonding between the rubber outsole and the EVA midsole, while also possessing excellent resistance to damp heat aging, high temperature resistance, and bending resistance.

[0006] Another objective of this invention is to provide a method for preparing an environmentally friendly adhesive film material, which has a simple process.

[0007] The objective of this invention is achieved through the following technical solution: An environmentally friendly adhesive film material comprises the following raw materials in parts by weight: 40-60 parts of EPDM rubber, 20-30 parts of styrene-butadiene rubber, 10-20 parts of natural rubber, 10-30 parts of reinforcing agent, 10-15 parts of dynamic crosslinking agent, 3-8 parts of maleic anhydride, 5-15 parts of butyl acrylate, 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of fluorinated polysiloxane, and 0.5-1.5 parts of peroxide.

[0008] This invention addresses the inherent defects in the bonding of rubber / EVA heterogeneous materials by using a blend of ethylene propylene diene monomer (EPDM), styrene-butadiene rubber (SBR), and natural rubber (NR), further modified by synergistic modification with maleic anhydride and butyl acrylate. EPDM provides weather resistance and stability, SBR contributes strength and processability, and NR imparts high elasticity and initial tack; together, they form a matrix with excellent overall performance. To further enhance adhesion to the polar EVA midsole, maleic anhydride is introduced as a reactive monomer. Under the action of peroxides, it is grafted onto the rubber chains, and the resulting anhydride groups can chemically bond with EVA during molding. Butyl acrylate acts as a comonomer, enhancing chain flexibility, improving compatibility, and synergistically optimizing the grafting effect and interfacial toughness with maleic anhydride.

[0009] Preferably, the dynamic crosslinking agent is prepared by the following process: (1) Melamine, 3-butenoic acid, palladium trifluoroacetate and potassium iodide were added to N,N-dimethylformamide, and then tert-butyl hydrogen peroxide was added. After stirring and reacting, the mixture was purified to obtain intermediate 1. The structural formula of intermediate 1 is: (2) Cystamine dihydrochloride and triethylamine were added to tetrahydrofuran, stirred, and then intermediate 1 was added to react. After the reaction was completed, the mixture was purified to obtain the dynamic crosslinking agent. The structural formula of the dynamic crosslinking agent is: .

[0010] Preferably, the molar ratio of melamine, 3-butenoic acid, palladium trifluoroacetate, potassium iodide and tert-butyl hydroperoxide in step (1) is 1:(3.5-4):(0.5-0.8):(3-4):(4.5-6); the stirring reaction temperature is 40-50℃ and the time is 24-30 h.

[0011] Preferably, in step (2), the ratio of intermediate 1, cystamine dihydrochloride, and triethylamine is 1 mmol: (4-5) mmol: (1-1.2) mL; the stirring time is 20-30 min; and the reaction temperature is 40-50℃.

[0012] Preferably, the fluorinated polysiloxane is prepared by the following process: In the presence of a catalyst, tetramethyldivinyldisiloxane and trifluoropropylmethylcyclotrisiloxane are reacted and purified to obtain the fluorinated polysiloxane.

[0013] The reaction process is as follows: Preferably, the molar ratio of tetramethyldivinyldisiloxane to trifluoropropylmethylcyclotrisiloxane is 1:(4-6); the amount of catalyst added is 0.1-0.2% of the total mass of tetramethyldivinyldisiloxane and trifluoropropylmethylcyclotrisiloxane; the catalyst is trifluoromethanesulfonic acid; the reaction temperature is 60-70℃ and the reaction time is 6-8 h.

[0014] Preferably, the reinforcing agent is silica or diatomaceous earth; the peroxide is 1,4-bis-tert-butylperoxyisopropylbenzene (BIPB).

[0015] The preparation method of the above-mentioned environmentally friendly adhesive film material includes the following steps: S1. According to the weight parts, EPDM rubber, styrene-butadiene rubber, natural rubber, maleic anhydride, butyl acrylate and half of the peroxide are mixed and then melt-blended to obtain the grafted rubber compound. S2. Mix the grafted rubber compound, dynamic crosslinking agent, fluorinated polysiloxane, remaining peroxide, reinforcing agent, zinc oxide, and stearic acid evenly, and extrude them into a film.

[0016] Preferably, the melt blending temperature in step S1 is 160-180°C.

[0017] Preferably, the mixing temperature in step S2 is 140-150°C.

[0018] The present invention has the following advantages over the prior art: 1. The environmentally friendly adhesive film material provided by the present invention, by introducing a specific crosslinking agent with a triazine ring and dynamic disulfide bond (SS) structure and a fluorinated polysiloxane into the EPDM / SBR / natural rubber matrix, can achieve high-strength bonding between the rubber outsole and the EVA insole, while also possessing excellent resistance to damp heat aging, high temperature resistance and bending resistance.

[0019] 2. The dynamic crosslinking agent added in this invention has reactive functional groups (such as -NH2, -OH) at its ends that can form a strong hydrogen bond network with the polar groups in the EVA mid-base, providing good interfacial affinity. Simultaneously, the maleic anhydride introduced into the film formulation of this invention is grafted onto the rubber molecular chain under the action of peroxides, forming highly active anhydride groups. These anhydride groups can react with the terminal functional groups of the dynamic crosslinking agent, forming a multi-layered chemical bonding network within the film, significantly improving the cohesive strength and interfacial adhesion of the film. Furthermore, the dynamic disulfide bonds (SS bonds) within the dynamic crosslinking agent molecule can effectively dissipate energy through reversible breakage and recombination, significantly improving the flexural strength of the film. At the same time, its rigid triazine ring structure and stable crosslinking network greatly enhance the dimensional stability and creep resistance of the film under high-temperature environments, achieving excellent high-temperature stability.

[0020] 3. The reactive fluorinated polysiloxane added in this invention has fluorinated segments that give the film excellent hydrophobic properties, effectively blocking water vapor erosion, thereby significantly improving the adhesion retention rate of the film under humid and hot aging conditions; at the same time, its reactive ends migrate to the surface during processing to participate in covalent cross-linking, and significantly improve the wettability of the adhesive to the substrate, fundamentally enhancing the interfacial bonding strength. Detailed Implementation

[0021] The technical solution of the present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the following embodiments are only for illustrating the present invention and should not be regarded as limiting the present invention. Specific conditions not specified in the embodiments are performed according to conventional conditions or conditions recommended by the manufacturer. Unless otherwise specified, the reagents or instruments used are all conventional products obtained through commercial channels.

[0022] (I) Implementation Examples Example 1 Example 1 provides a dynamic crosslinking agent, and the preparation process is as follows: (1) Melamine (CAS: 108-78-1, 10 mmol), 3-butenoic acid (CAS: 625-38-7, 37 mmol), palladium trifluoroacetate (catalyst, CAS: 42196-31-6, 6 mmol) and potassium iodide (KI, 32 mmol) were added to 45 mL of DMF, and then tert-butyl hydroperoxide (TBHP, 5.5 mol / L decane solution, 50 mmol) was added. The mixture was stirred at 45 °C for 28 h. After the reaction was completed, the mixture was cooled to room temperature, diluted with 100 mL of dichloromethane, filtered through diatomaceous earth, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel rapid chromatography (eluent: dichloromethane / methanol = 30:1~5:1) to obtain intermediate 1 with a yield of 74.8%. The NMR and mass spectrometry results are as follows: 1 H NMR (C 15 H 18 HRMS (ESI) + ): [M+H] + The calculation yields 379.13, and the value is found to be 379.13.

[0023] (2) Cystamine dihydrochloride (46 mmol) and triethylamine (11 mL) were added to 200 mL of tetrahydrofuran and stirred for 25 min. Then, intermediate 1 (10 mmol) was added and reacted at 45 °C. After the reaction of intermediate 1 was complete, the reaction system was cooled to room temperature and most of the solvent was removed by rotary evaporation. 150 mL of dichloromethane was added to the residue and stirred thoroughly for 10 min with 100 mL of saturated ammonium chloride aqueous solution. The organic phase was collected by separation and the aqueous phase was extracted with dichloromethane. The organic phases were combined and washed successively with hydrochloric acid aqueous solution (100 mL, 1 mol / L) and deionized water (100 mL) by shaking. The solution was dried over anhydrous sodium sulfate and finally purified by column chromatography (dichloromethane / methanol = 20:1~10:1) to obtain the dynamic crosslinking agent. The NMR and mass spectrometry results are as follows: 1 H NMR (C 27 H 54 N 12O6S6, 400 MHz, d6-DMSO) δ 8.15 (s, 3H), 8.01(s, 3H), 4.50(s, 3H), 3.51-3.46(m, 9H), 3.21 (dd, 3H), 2.97-2.92(m, 9H), 2.82(t, 12H),2.48(dd, 3H), 2.23 (dd, 3H), 1.52(s, 6H); HRMS (ESI + ): [M+H] + The calculation yields 835.26, and the value is found to be 835.26.

[0024] Example 2 Example 2 provides a dynamic crosslinking agent, and the preparation process is as follows: (1) Melamine (10 mmol), 3-butenoic acid (35 mmol), palladium trifluoroacetate (5 mmol) and KI (30 mmol) were added to 40 mL of DMF, and then TBHP (45 mmol) was added. The mixture was stirred at 40 °C for 30 h. After the reaction was completed, the mixture was cooled to room temperature, diluted with 100 mL of dichloromethane, filtered through diatomaceous earth, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel rapid chromatography (eluent: dichloromethane / methanol = 30:1~5:1) to obtain intermediate 1 with a yield of 75.0%. The NMR and mass spectrometry results were the same as in Example 1.

[0025] (2) Cystamine dihydrochloride (40 mmol) and triethylamine (10 mL) were added to 200 mL of tetrahydrofuran and stirred for 20 min. Then, intermediate 1 (10 mmol) was added and reacted at 40 °C. After the reaction of intermediate 1 was complete by TLC monitoring, the reaction system was cooled to room temperature and most of the solvent was removed by rotary evaporation. 150 mL of dichloromethane was added to the residue and stirred thoroughly for 10 min with 100 mL of saturated ammonium chloride aqueous solution. The organic phase was collected by separation and the aqueous phase was extracted with dichloromethane. The organic phases were combined and washed successively with hydrochloric acid aqueous solution (100 mL 1 mol / L) and deionized water (100 mL) by shaking. The solution was dried with anhydrous sodium sulfate and finally purified by column chromatography (dichloromethane / methanol = 20:1~10:1) to obtain the dynamic crosslinking agent. The NMR and mass spectrometry results were the same as in Example 1.

[0026] Example 3 Example 3 provides a dynamic crosslinking agent, and the preparation process is as follows: (1) Melamine (10 mmol), 3-butenoic acid (40 mmol), palladium trifluoroacetate (8 mmol) and KI (40 mmol) were added to 50 mL of DMF, and then TBHP (60 mmol) was added. The mixture was stirred at 50 °C for 24 h. After the reaction was completed, the mixture was cooled to room temperature, diluted with 100 mL of dichloromethane, filtered through diatomaceous earth, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel rapid chromatography (eluent: dichloromethane / methanol = 30:1~5:1) to obtain intermediate 1 with a yield of 75.5%. The NMR and mass spectrometry results were the same as in Example 1.

[0027] (2) Cystamine dihydrochloride (50 mmol) and triethylamine (12 mL) were added to 200 mL of tetrahydrofuran and stirred for 30 min. Then, intermediate 1 (10 mmol) was added and reacted at 50 °C. After the reaction of intermediate 1 was complete by TLC monitoring, the reaction system was cooled to room temperature and most of the solvent was removed by rotary evaporation. 150 mL of dichloromethane was added to the residue and stirred thoroughly for 10 min with 100 mL of saturated ammonium chloride aqueous solution. The organic phase was collected by separation and the aqueous phase was extracted with dichloromethane. The organic phases were combined and washed successively with hydrochloric acid aqueous solution (100 mL 1 mol / L) and deionized water (100 mL) by shaking. The solution was dried with anhydrous sodium sulfate and finally purified by column chromatography (dichloromethane / methanol = 20:1~10:1) to obtain the dynamic crosslinking agent. The NMR and mass spectrometry results were the same as in Example 1.

[0028] Example 4 Example 4 provides a fluorinated polysiloxane, which is prepared by the following process: Tetramethyldivinyldisiloxane and trifluoropropylmethylcyclotrisiloxane were mixed at a molar ratio of 1:5, and then trifluoromethanesulfonic acid was added, with the amount of trifluoromethanesulfonic acid being 0.15% of the total mass of the reactants. The mixture was reacted at 65°C for 7 h. After the reaction was completed, anhydrous sodium carbonate was added to neutralize to pH=6.8, and the mixture was filtered. The filtrate was then distilled under reduced pressure to remove unreacted monomers, yielding a fluorinated polysiloxane. The relative molecular mass of the fluorinated polysiloxane was measured to be 2570 using GPC gel permeation chromatography.

[0029] Example 5 Example 5 provides a fluorinated polysiloxane, which is prepared by the following process: Tetramethyldivinyldisiloxane and trifluoropropylmethylcyclotrisiloxane were mixed at a molar ratio of 1:4, and then trifluoromethanesulfonic acid was added, with the amount of trifluoromethanesulfonic acid being 0.1% of the total mass of the reactants. The mixture was reacted at 70°C for 6 h. After the reaction was completed, anhydrous sodium carbonate was added to neutralize to pH=6.5, and the mixture was filtered. The filtrate was then distilled under reduced pressure to remove unreacted monomers, yielding a fluorinated polysiloxane. The relative molecular mass of the fluorinated polysiloxane was measured to be 2380 using GPC gel permeation chromatography.

[0030] Example 6 Example 6 provides a fluorinated polysiloxane, which is prepared by the following process: Tetramethyldivinyldisiloxane and trifluoropropylmethylcyclotrisiloxane were mixed at a molar ratio of 1:6, and then trifluoromethanesulfonic acid was added, with the amount of trifluoromethanesulfonic acid being 0.2% of the total mass of the reactants. The mixture was reacted at 60°C for 8 h. After the reaction was completed, anhydrous sodium carbonate was added to neutralize to pH=7, and the mixture was filtered. The filtrate was then distilled under reduced pressure to remove unreacted monomers, yielding a fluorinated polysiloxane. The relative molecular mass of the fluorinated polysiloxane was measured to be 2822 using GPC gel permeation chromatography.

[0031] Example 7 Example 7 provides an environmentally friendly adhesive film material comprising the following raw materials in parts by weight: 50 parts of EPDM rubber, 24 parts of styrene-butadiene rubber, 17 parts of natural rubber, 22 parts of silica, 14 parts of the dynamic crosslinking agent of Example 1, 6 parts of maleic anhydride, 8 parts of butyl acrylate, 4 parts of zinc oxide, 1.5 parts of stearic acid, 1.2 parts of the fluorinated polysiloxane of Example 4, and 1 part of BIPB.

[0032] Example 7 also provides a method for preparing the above-mentioned environmentally friendly film material, including the following steps: S1. EPDM rubber, styrene-butadiene rubber, natural rubber, maleic anhydride, butyl acrylate and half of BIPB are blended and melt-blended in a screw extruder (160-180℃) under the initiation of peroxide to complete the grafting reaction and obtain grafted rubber compound; S2. The grafted rubber compound, dynamic crosslinking agent, fluorinated polysiloxane, remaining BIPB, silica, zinc oxide, and stearic acid are mixed evenly at 145°C and extruded into a film.

[0033] Example 8 Example 8 provides an environmentally friendly adhesive film material comprising the following raw materials in parts by weight: 40 parts of EPDM rubber, 20 parts of styrene-butadiene rubber, 10 parts of natural rubber, 10 parts of diatomaceous earth, 10 parts of the dynamic crosslinking agent of Example 2, 3 parts of maleic anhydride, 5 parts of butyl acrylate, 3 parts of zinc oxide, 1 part of stearic acid, 1 part of the fluorinated polysiloxane of Example 5, and 0.5 parts of BIPB.

[0034] Example 8 also provides a method for preparing the above-mentioned environmentally friendly film material, including the following steps: S1. EPDM rubber, styrene-butadiene rubber, natural rubber, maleic anhydride, butyl acrylate and half of BIPB are blended and melt-blended in a screw extruder (160-180℃) under the initiation of peroxide to complete the grafting reaction and obtain grafted rubber compound; S2. The grafted adhesive, dynamic crosslinking agent, fluorinated polysiloxane, remaining BIPB, diatomaceous earth, zinc oxide, and stearic acid are mixed evenly at 140°C and extruded into a film.

[0035] Example 9 Example 9 provides an environmentally friendly adhesive film material comprising the following raw materials in parts by weight: 60 parts of EPDM rubber, 30 parts of styrene-butadiene rubber, 20 parts of natural rubber, 30 parts of silica, 15 parts of the dynamic crosslinking agent of Example 3, 8 parts of maleic anhydride, 15 parts of butyl acrylate, 5 parts of zinc oxide, 2 parts of stearic acid, 2 parts of the fluorinated polysiloxane of Example 6, and 1.5 parts of BIPB.

[0036] Example 9 also provides a method for preparing the above-mentioned environmentally friendly film material, including the following steps: S1. EPDM rubber, styrene-butadiene rubber, natural rubber, maleic anhydride, butyl acrylate and half of BIPB are blended and melt-blended in a screw extruder (160-180℃) under the initiation of peroxide to complete the grafting reaction and obtain grafted rubber compound; S2. The grafted rubber compound, dynamic crosslinking agent, fluorinated polysiloxane, remaining BIPB, silica, zinc oxide, and stearic acid are mixed evenly at 150°C and extruded into a film.

[0037] (ii) Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 7 is that the dynamic crosslinking agent of Example 1 is omitted.

[0038] Comparative Example 2 The difference between Comparative Example 2 and Example 7 is that the dynamic crosslinking agent in Example 1 was replaced with the crosslinking agent triallyl isocyanurate (TAIC).

[0039] Comparative Example 3 The difference between Comparative Example 3 and Example 7 is that the fluorinated polysiloxane in Example 4 is omitted.

[0040] (III) Experimental Examples The adhesive films obtained in the examples and comparative examples were laminated with rubber outsoles and EVA midsoles respectively using existing processes to obtain composite soles. Strips 2.5cm wide and 20cm long were cut from the composite soles and the following tests were performed: Peel strength: Tested according to GB 19340-2014; Resistance to damp heat aging: Measured by the retention rate of peel strength. The test temperature is 80℃, the humidity is 95%, and the time is 72h. Resistance to damp heat aging = peel strength of the sample after the test / peel strength of the sample before the test. High temperature resistance: Measured by the retention rate of peel strength. The test temperature is 80℃ and the time is 120h. High temperature resistance = peel strength of the sample after the test / peel strength of the sample before the test. Bending resistance: The test was conducted in accordance with GB / T 20991-2024 at a temperature of 20℃. The results are shown in Table 1.

[0041] Table 1 Table 1 shows that the material obtained by the present invention has excellent adhesion properties, as well as excellent resistance to damp heat aging, high temperature resistance and bending resistance.

[0042] Comparative Example 1 omits the dynamic crosslinking agent of the present invention, while Comparative Example 2 replaces the dynamic crosslinking agent with the conventional crosslinking agent TAIC. As can be seen from Table 1, compared with Comparative Examples 1-2, the material obtained in Example 7 has excellent peel strength, as well as high temperature resistance and bending resistance. Specific analysis reveals that the reactive functional groups (such as -NH2, -OH) at the end of the dynamic crosslinking agent of the present invention can form a strong hydrogen bond network with the polar groups in the EVA substrate, providing good interfacial affinity. Simultaneously, the maleic anhydride introduced into the film formulation of the present invention is grafted onto the rubber molecular chain under the action of peroxides, forming highly active anhydride groups. These anhydride groups can react with the terminal functional groups of the dynamic crosslinking agent, forming a multiple chemical bonding network inside the film, significantly improving the cohesive strength and interfacial adhesion of the film. Furthermore, the dynamic disulfide bonds (SS bonds) within the dynamic crosslinking agent molecules can effectively dissipate energy through reversible breakage and recombination, significantly improving the bending resistance of the film. At the same time, its rigid triazine ring structure and stable crosslinking network greatly enhance the dimensional stability and creep resistance of the film under high temperature conditions, achieving excellent high temperature stability.

[0043] Comparative Example 3 omits the fluorinated polysiloxane of the present invention. As can be seen from Table 1, compared with Comparative Example 3, the material obtained in Example 7 has excellent peel strength and resistance to humid heat aging. Specific analysis shows that the fluorinated segments of the fluorinated polysiloxane impart excellent hydrophobic properties to the adhesive film, effectively blocking moisture erosion, thereby significantly improving the adhesion retention rate of the adhesive film under humid heat aging conditions. Simultaneously, its reactive ends migrate to the surface during processing to participate in covalent cross-linking and significantly improve the wettability of the adhesive to the substrate, fundamentally enhancing the interfacial bonding strength.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. The basic principles and main features of the present invention have been described above with specific implementation schemes. Based on the present invention, some modifications or substitutions can be made, but these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of protection claimed by the present invention.

Claims

1. An environmentally friendly adhesive film material, characterized in that, The raw materials include the following parts by weight: 40-60 parts of EPDM rubber, 20-30 parts of styrene-butadiene rubber, 10-20 parts of natural rubber, 10-30 parts of reinforcing agent, 10-15 parts of dynamic crosslinking agent, 3-8 parts of maleic anhydride, 5-15 parts of butyl acrylate, 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of fluorinated polysiloxane, and 0.5-1.5 parts of peroxide; The structural formula of the dynamic crosslinking agent is: 。 2. The environmentally friendly adhesive film material according to claim 1, characterized in that, The dynamic crosslinking agent is prepared by the following process: (1) Melamine, 3-butenoic acid, palladium trifluoroacetate and potassium iodide were added to N,N-dimethylformamide, and then tert-butyl hydrogen peroxide was added. After stirring and reacting, the mixture was purified to obtain intermediate 1. The structural formula of intermediate 1 is: (2) Cystamine dihydrochloride and triethylamine were added to tetrahydrofuran, stirred, and then intermediate 1 was added to react. After the reaction was completed, the mixture was purified to obtain the dynamic crosslinking agent.

3. The environmentally friendly adhesive film material according to claim 2, characterized in that, The molar ratio of melamine, 3-butenoic acid, palladium trifluoroacetate, potassium iodide, and tert-butyl hydroperoxide in step (1) is 1:(3.5-4):(0.5-0.8):(3-4):(4.5-6); the stirring reaction is carried out at a temperature of 40-50℃ for 24-30 h.

4. The environmentally friendly adhesive film material according to claim 2, characterized in that, In step (2), the ratio of intermediate 1, cystamine dihydrochloride, and triethylamine is 1 mmol: (4-5) mmol: (1-1.2) mL; the stirring time is 20-30 min; and the reaction temperature is 40-50℃.

5. The environmentally friendly adhesive film material according to claim 1, characterized in that, The fluorinated polysiloxane is prepared by the following process: In the presence of a catalyst, tetramethyldivinyldisiloxane and trifluoropropylmethylcyclotrisiloxane are reacted and purified to obtain the fluorinated polysiloxane.

6. The environmentally friendly adhesive film material according to claim 5, characterized in that, The molar ratio of tetramethyldivinyldisiloxane to trifluoropropylmethylcyclotrisiloxane is 1:(4-6); the amount of catalyst added is 0.1-0.2% of the total mass of tetramethyldivinyldisiloxane and trifluoropropylmethylcyclotrisiloxane; the catalyst is trifluoromethanesulfonic acid; the reaction temperature is 60-70℃ and the time is 6-8 h.

7. The environmentally friendly adhesive film material according to claim 1, characterized in that, The reinforcing agent is silica or diatomaceous earth; the peroxide is 1,4-di-tert-butylperoxyisopropylbenzene.

8. The method for preparing the environmentally friendly adhesive film material according to any one of claims 1-7, characterized in that, Includes the following steps: S1. According to the weight parts, EPDM rubber, styrene-butadiene rubber, natural rubber, maleic anhydride, butyl acrylate and half of the peroxide are mixed and then melt-blended to obtain the grafted rubber compound. S2. Mix the grafted rubber compound, dynamic crosslinking agent, fluorinated polysiloxane, remaining peroxide, reinforcing agent, zinc oxide, and stearic acid evenly, and extrude them into a film.

9. The method for preparing the environmentally friendly adhesive film material according to claim 8, characterized in that, The melting and blending temperature in step S1 is 160-180℃.

10. The method for preparing the environmentally friendly adhesive film material according to claim 8, characterized in that, The mixing temperature in step S2 is 140-150℃.

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