A kind of moisture and heat resistant UV adhesive and its preparation process

Abstract

The present invention relates to the technical field of adhesives and discloses a moisture-heat-resistant UV adhesive and a preparation process thereof. The method comprises adding bisphenol A epoxy resin to a reactor, heating the reactor to 80-95°C, stirring the reactor, adding methyl methacrylate, butyl acrylate, 1H,1H,2H,2H-perfluorooctyl acrylate, a hydroquinone polymerization inhibitor, an imidazole-based auxiliary agent, and a modified benzoxazine, stirring the reactor for 30-40 minutes, and then adding a photoinitiator 184. The reaction is then stirred for 30-45 minutes under light-shielding conditions to obtain a moisture-heat-resistant UV adhesive. The moisture-heat-resistant UV adhesive has good moisture-heat resistance and flame retardant effects.

Description

Technical Field

[0001] The present invention relates to the technical field of adhesives, in particular to a moisture-heat-resistant UV adhesive and a preparation process thereof. Background Art

[0002] UV (ultraviolet light)-curing adhesives are widely used in electronics, optics, medical, and other fields due to their advantages, including fast curing speed, low energy consumption, no solvent volatilization, and high bond strength. However, after curing, the adhesive layer of traditional UV adhesives is prone to hydrolysis in hot and humid environments, causing volume expansion and even cracking. For example, patent CN107987737A discloses a UV pressure-sensitive adhesive, its preparation method, and application. The UV pressure-sensitive adhesive contains 50-70% by mass of component a, 10-20% by mass of component b, and 20-30% by mass of component c. After UV curing, the adhesive produces a peelable pressure-sensitive adhesive with excellent adhesion to glass, plastic, metal, and other materials, allowing for repeated use. However, its resistance to heat and humidity is not improved. Summary of the Invention

[0003] (1) Technical problems solved

[0004] In view of the deficiencies in the prior art, the present invention provides a moisture-heat resistant UV adhesive and a preparation process thereof, which has good moisture-heat resistance and flame retardant effects.

[0005] (2) Technical solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a moisture-heat-resistant UV adhesive, comprising the following components by weight: 50-65 parts by weight of bisphenol A epoxy resin, 20-26 parts by weight of methyl methacrylate, 15-25 parts by weight of butyl acrylate, 2-5 parts by weight of 1H,1H,2H,2H-perfluorooctyl acrylate, 1-2 parts by weight of hydroquinone polymerization inhibitor, 2-4 parts by weight of imidazole-based auxiliary agent, 2-3 parts by weight of modified benzoxazine, and 1-4 parts by weight of photoinitiator 184.

[0007] Furthermore, the preparation method of the imidazole-based auxiliary agent is:

[0008] S1. 10-12 mmol of 4,4'-dihydroxybenzophenone and 3.01-3.02 mL of triethylamine were added to 85-100 mL of anhydrous dichloromethane solvent, stirred in an ice bath, and then 20-22 mmol of diphenyl chlorophosphate was added thereto. The reaction was carried out at 1-2°C for 20-30 min. After the reaction was completed, the mixture was extracted three times with deionized water / dichloromethane. The organic phase was dried over anhydrous sodium sulfate and the solvent was removed under reduced pressure to obtain intermediate 1. 9-10 mmol of intermediate 1 and 90-100 mL of ethanol were added to a reactor, stirred in an ice water bath, and 6.5-6.7 mmol of sodium borohydride was added. The reaction was stirred at 1-3°C for 4-6 h. After the reaction was completed, a small amount of deionized water was added to quench the reaction. The ethanol was removed under reduced pressure and the mixture was extracted three times with deionized water / dichloromethane. The organic phase was dried over anhydrous sodium sulfate and the solvent was removed to obtain intermediate 2.

[0009] S2. Add 1-isopropyl-2-trifluoromethyl-1H-benzimidazole-5-carbonyl chloride and intermediate 2 to anhydrous dichloromethane solvent, stir and mix, continue to add pyridine catalyst, react for 4-7 hours, add cold water after reaction, extract with ethyl acetate, add anhydrous magnesium sulfate to dry, then filter, concentrate under reduced pressure, and purify by chromatography column to obtain an imidazole-containing auxiliary agent.

[0010] Furthermore, the usage ratio of anhydrous dichloromethane solvent, 1-isopropyl-2-trifluoromethyl-1H-benzimidazole-5-carbonyl chloride, intermediate 2, and pyridine catalyst in S2 is 45-55 mL: 0.8-0.9 mmol: 0.74-0.82 mmol: 0.012-0.015 mmol.

[0011] Furthermore, the reaction temperature in S2 is 0-5°C.

[0012] Furthermore, the preparation method of the modified benzoxazine is:

[0013] Step 1: Add magnolol, paraformaldehyde, and furfurylamine to a toluene solvent and react at 110-120°C for 6-8 hours. After reaction, wash the mixture with 1 mol / L sodium hydroxide solution three times, then with distilled water three times, and remove the solvent by rotary evaporation to obtain a crude product, which is then recrystallized from ethanol to obtain alkenylbenzoxazine.

[0014] Step 2: Add alkenylbenzoxazine to N,N-dimethylformamide solvent, stir and disperse, then add mercaptoethylamine and benzoin dimethyl ether photoinitiator, irradiate with 365nm ultraviolet light at 20-40°C for 20-40 minutes, centrifuge, wash and dry to obtain modified benzoxazine.

[0015] Furthermore, in the step 1, the usage ratio of magnolol, paraformaldehyde, furfurylamine, and toluene solvent is 1-1.02 mmol: 1.94-2.2 mmol: 0.9-1 mmol: 30-40 mL.

[0016] Furthermore, in the step 2, the usage ratio of N,N-dimethylformamide solvent, alkenylbenzoxazine, mercaptoethylamine, and benzoin dimethyl ether photoinitiator is 35-45 mL: 1.2-1.3 mmol: 0.65-0.78 mmol: 0.02-0.03 mmol.

[0017] Furthermore, it is characterized in that the preparation process of the moisture-heat-resistant UV adhesive is: adding bisphenol A epoxy resin into a reaction kettle, heating to 80-95°C, keeping stirring, continuing to add methyl methacrylate, butyl acrylate, 1H,1H,2H,2H-perfluorooctyl acrylate, hydroquinone inhibitor, imidazole-based auxiliary agent, modified benzoxazine, keeping stirring for 30-40 minutes, continuing to add photoinitiator 184, keeping stirring for 30-45 minutes under shading conditions, to obtain moisture-heat-resistant UV adhesive.

[0018] (3) Beneficial technical effects

[0019] The phosphorus and nitrogen contained in the imidazole-based additive and the sulfur contained in the modified benzoxazine have strong flame retardant properties, forming a flame retardant system. Furthermore, benzoxazine itself also exhibits strong flame retardancy and heat resistance, and its addition to UV adhesives enhances its flame retardancy. The imidazole groups in the imidazole-based additive and the diamino groups in the modified benzoxazine promote the curing of the epoxy groups in the bisphenol A epoxy resin, forming a curing system. The fluorocarbon chains contained in the imidazole-based additive and 1H,1H,2H,2H-perfluorooctyl acrylate exhibit low surface energy, reducing water absorption and providing excellent moisture resistance. They also cross-link with the bisphenol A epoxy resin, forming a dense network and enhancing moisture resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the reaction process of intermediate 2. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Photoinitiator 184: 1-hydroxycyclohexyl phenyl ketone.

[0024] 1H,1H,2H,2H-Perfluorooctyl acrylate: CAS: 17527-29-6.

[0025] Paraformaldehyde (97%) was provided by Shanghai MacLean Biochemical Technology Co., Ltd.

[0026] 1-Isopropyl-2-trifluoromethyl-1H-benzimidazole-5-carbonyl chloride CAS: 690632-69-0. Example 1

[0027] A moisture-heat-resistant UV adhesive comprises the following components by weight: 50 parts by weight of bisphenol A epoxy resin, 20 parts by weight of methyl methacrylate, 15 parts by weight of butyl acrylate, 2 parts by weight of 1H,1H,2H,2H-perfluorooctyl acrylate, 1 part by weight of hydroquinone polymerization inhibitor, 2 parts by weight of imidazole-based auxiliary agent, 2 parts by weight of modified benzoxazine, and 1 part by weight of photoinitiator 184.

[0028] The preparation method of the imidazole-based auxiliary agent is:

[0029] S1. 10 mmol of 4,4'-dihydroxybenzophenone and 3.01 mL of triethylamine were added to 85 mL of anhydrous dichloromethane solvent and stirred in an ice bath. 20 mmol of diphenyl chlorophosphate was then added and the mixture was reacted at 1°C for 20 min. After the reaction, the mixture was extracted three times with deionized water / dichloromethane. The organic phase was dried over anhydrous sodium sulfate and the solvent was removed under reduced pressure to obtain intermediate 1. 9 mmol of intermediate 1 and 90 mL of ethanol were added to a reactor and stirred in an ice-water bath. 6.5 mmol of sodium borohydride was further added and the mixture was stirred at 1°C for 4 h. After the reaction was completed, a small amount of deionized water was added to quench the reaction. The ethanol was removed under reduced pressure and the mixture was extracted three times with deionized water / dichloromethane. The organic phase was dried over anhydrous sodium sulfate and the solvent was removed to obtain intermediate 2.

[0030] S2. Add 0.8 mmol of 1-isopropyl-2-trifluoromethyl-1H-benzimidazole-5-carbonyl chloride and 0.74 mmol of intermediate 2 to 45 mL of anhydrous dichloromethane solvent, stir and mix, and continue to add 0.012 mmol of pyridine. React at 0°C for 4 hours. After reaction, add cold water, extract with ethyl acetate, add anhydrous magnesium sulfate for drying, then filter, concentrate under reduced pressure, and purify by chromatography column to obtain an imidazole-containing auxiliary agent.

[0031] The preparation method of the modified benzoxazine is:

[0032] Step 1: 1 mmol of magnolol, 1.94 mmol of paraformaldehyde, and 0.9 mmol of furfurylamine were added to 30 mL of toluene solvent and reacted at 110°C for 6 h. After completion, the mixture was washed with 1 mol / L sodium hydroxide solution three times and with distilled water three times. The solvent was removed by rotary evaporation to obtain a crude product, which was recrystallized from ethanol to obtain alkenylbenzoxazine;

[0033] Step 2: Add 1.2 mmol of alkenylbenzoxazine to 35 mL of N,N-dimethylformamide solvent, stir and disperse, then add 0.65 mmol of mercaptoethylamine and 0.02 mmol of benzoin dimethyl ether photoinitiator, irradiate with 365 nm ultraviolet light at 20°C for 20 minutes, centrifuge, wash and dry to obtain modified benzoxazine.

[0034] The preparation process of the moisture-heat-resistant UV adhesive is as follows: bisphenol A epoxy resin is added to a reaction kettle, the temperature is raised to 80° C., stirring is maintained, methyl methacrylate, butyl acrylate, 1H,1H,2H,2H-perfluorooctyl acrylate, hydroquinone polymerization inhibitor, imidazole-based auxiliary agent, and modified benzoxazine are continuously added, stirring is maintained for 30 minutes, photoinitiator 184 is continuously added, stirring is maintained for 30 minutes under light-shielding conditions, and the moisture-heat-resistant UV adhesive is obtained. Example 2

[0035] A moisture-heat-resistant UV adhesive comprises the following components by weight: 65 parts by weight of bisphenol A epoxy resin, 26 parts by weight of methyl methacrylate, 25 parts by weight of butyl acrylate, 5 parts by weight of 1H,1H,2H,2H-perfluorooctyl acrylate, 2 parts by weight of hydroquinone polymerization inhibitor, 4 parts by weight of imidazole-based auxiliary agent, 3 parts by weight of modified benzoxazine, and 4 parts by weight of photoinitiator 184.

[0036] The preparation method of the imidazole-based auxiliary agent is:

[0037] S1. 12 mmol of 4,4'-dihydroxybenzophenone and 3.02 mL of triethylamine were added to 100 mL of anhydrous dichloromethane solvent and stirred in an ice bath. 22 mmol of diphenyl chlorophosphate was then added and the mixture was reacted at 2°C for 30 min. After the reaction, the mixture was extracted three times with deionized water / dichloromethane. The organic phase was dried over anhydrous sodium sulfate and the solvent was removed under reduced pressure to obtain intermediate 1. 10 mmol of intermediate 1 and 100 mL of ethanol were added to a reactor and stirred in an ice-water bath. 6.7 mmol of sodium borohydride was further added and the mixture was stirred at 3°C ​​for 6 h. After the reaction was completed, a small amount of deionized water was added to quench the reaction. The ethanol was removed under reduced pressure and the mixture was extracted three times with deionized water / dichloromethane. The organic phase was dried over anhydrous sodium sulfate and the solvent was removed to obtain intermediate 2.

[0038] S2. Add 0.9 mmol of 1-isopropyl-2-trifluoromethyl-1H-benzimidazole-5-carbonyl chloride and 0.82 mmol of intermediate 2 to 55 mL of anhydrous dichloromethane solvent, stir and mix, continue to add 0.015 mmol of pyridine, react at 5°C for 7 hours, add cold water after reaction, extract with ethyl acetate, add anhydrous magnesium sulfate for drying, then filter, concentrate under reduced pressure, and purify by chromatography column to obtain an imidazole-containing auxiliary agent.

[0039] The preparation method of the modified benzoxazine is:

[0040] Step 1: Add 1.02 mmol of magnolol, 2.2 mmol of paraformaldehyde, and 1 mmol of furfurylamine to 40 mL of toluene solvent, react at 120°C for 8 hours, and then wash with 1 mol / L sodium hydroxide solution three times, wash with distilled water three times, and remove the solvent by rotary evaporation to obtain a crude product, which is recrystallized from ethanol to obtain alkenylbenzoxazine;

[0041] Step 2: Add 1.3 mmol of alkenylbenzoxazine to 45 mL of N,N-dimethylformamide solvent, stir and disperse, then add 0.78 mmol of mercaptoethylamine and 0.03 mmol of benzoin dimethyl ether photoinitiator, irradiate with 365 nm ultraviolet light at 40°C for 40 minutes, centrifuge, wash and dry to obtain modified benzoxazine.

[0042] The preparation process of the moisture-heat-resistant UV adhesive is as follows: bisphenol A epoxy resin is added to a reaction kettle, the temperature is raised to 95° C., stirring is maintained, methyl methacrylate, butyl acrylate, 1H,1H,2H,2H-perfluorooctyl acrylate, hydroquinone polymerization inhibitor, imidazole-based auxiliary agent, and modified benzoxazine are continuously added, stirring is maintained for 40 minutes, photoinitiator 184 is continuously added, stirring is maintained for 45 minutes under light-shielding conditions, and the moisture-heat-resistant UV adhesive is obtained. Example 3

[0043] A moisture-heat-resistant UV adhesive comprises the following components by weight: 55 parts by weight of bisphenol A epoxy resin, 23 parts by weight of methyl methacrylate, 20 parts by weight of butyl acrylate, 4 parts by weight of 1H,1H,2H,2H-perfluorooctyl acrylate, 1.5 parts by weight of hydroquinone polymerization inhibitor, 3 parts by weight of imidazole-based auxiliary agent, 2.5 parts by weight of modified benzoxazine, and 2 parts by weight of photoinitiator 184.

[0044] The preparation method of the imidazole-based auxiliary agent is:

[0045] S1. 11 mmol of 4,4'-dihydroxybenzophenone and 3.01 mL of triethylamine were added to 90 mL of anhydrous dichloromethane solvent and stirred in an ice bath. 21 mmol of diphenyl chlorophosphate was then added and the mixture was reacted at 1°C for 25 min. After the reaction, the mixture was extracted three times with deionized water / dichloromethane. The organic phase was dried over anhydrous sodium sulfate and the solvent was removed under reduced pressure to obtain intermediate 1. 9.5 mmol of intermediate 1 and 95 mL of ethanol were added to a reactor and stirred in an ice-water bath. 6.6 mmol of sodium borohydride was further added and the mixture was stirred at 2°C for 5 h. After the reaction was completed, a small amount of deionized water was added to quench the reaction. The ethanol was removed under reduced pressure and the mixture was extracted three times with deionized water / dichloromethane. The organic phase was dried over anhydrous sodium sulfate and the solvent was removed to obtain intermediate 2.

[0046] S2. Add 0.85 mmol of 1-isopropyl-2-trifluoromethyl-1H-benzimidazole-5-carbonyl chloride and 0.81 mmol of intermediate 2 to 50 mL of anhydrous dichloromethane solvent, stir and mix, continue to add 0.014 mmol of pyridine, react at 3°C ​​for 5 hours, add cold water after reaction, extract with ethyl acetate, add anhydrous magnesium sulfate for drying, then filter, concentrate under reduced pressure, and purify by chromatography column to obtain an imidazole-containing auxiliary agent.

[0047] The preparation method of the modified benzoxazine is:

[0048] Step 1: 1.01 mmol of magnolol, 1.96 mmol of paraformaldehyde, and 0.95 mmol of furfurylamine were added to 35 mL of toluene solvent and reacted at 116°C for 7 hours. After completion, the mixture was washed with 1 mol / L sodium hydroxide solution three times and with distilled water three times. The solvent was removed by rotary evaporation to obtain a crude product, which was recrystallized from ethanol to obtain alkenylbenzoxazine;

[0049] Step 2: Add 1.25 mmol of alkenylbenzoxazine to 40 mL of N,N-dimethylformamide solvent, stir and disperse, then add 0.72 mmol of mercaptoethylamine and 0.026 mmol of benzoin dimethyl ether photoinitiator, irradiate with 365 nm ultraviolet light at 24°C for 28 minutes, centrifuge, wash and dry to obtain modified benzoxazine.

[0050] The preparation process of the moisture-heat-resistant UV adhesive is as follows: bisphenol A epoxy resin is added to a reaction kettle, the temperature is raised to 90° C., stirring is maintained, methyl methacrylate, butyl acrylate, 1H,1H,2H,2H-perfluorooctyl acrylate, hydroquinone polymerization inhibitor, imidazole-based auxiliary agent, and modified benzoxazine are continuously added, stirring is maintained for 35 minutes, photoinitiator 184 is continuously added, stirring is maintained for 40 minutes under light-shielding conditions, and the moisture-heat-resistant UV adhesive is obtained.

[0051] Comparative Example 1

[0052] Compared with Example 3, this comparative example differs in that Intermediate 2 is used instead of the imidazole-based auxiliary agent.

[0053] Comparative Example 2

[0054] This comparative example is different from Example 3 in that alkenyl benzoxazine is used instead of modified benzoxazine.

[0055] Performance Testing

[0056] Curing speed test: The adhesives of Examples 1-3 and Comparative Examples 1-2 were irradiated with 330 nm ultraviolet light (light intensity 500 mW / cm²) through the adhesive layer (2 mm) to obtain adhesive samples; curing speed: the surface dry time was recorded.

[0057] Moisture and heat resistance test: 180° peel strength test: According to GB2792-1998, the adhesive was applied to a 100μm PET film, coated with a PET release film, and after curing, cut into standard 25mm×200mm strips. The strips were then attached to a 1.5mm×40mm×120mm stainless steel plate and pressed back and forth with a roller three times. The strips were then left for 20 minutes. The 180° peel strength was then measured using an intelligent electronic tensile testing machine. Similarly, the peel strength was tested after 500 hours at 80°C and 95% humidity. Flammability test: A vertical flame test was conducted according to UL94-2022 using an RH-6033B horizontal vertical flame tester.

[0058] Table 1: Performance tests.

[0059] project Flame retardant grade Curing speed (time s) 180° initial peel strength (N / dm) Peel strength after 180° wet heat aging for 500h (N / dm) Example 1 V-0 5 56 51 Example 2 V-0 6 54 48 Example 3 V-0 4 59 53 Comparative Example 1 V-1 8 45 38 Comparative Example 2 V-1 9 47 36

[0060] As can be seen from Table 1, Examples 1-3 of the present invention have better moisture and heat resistance and flame retardant effects than Comparative Examples 1-2.

[0061] It should be noted that, in this document, the terms "comprise," "include," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

[0063] Those skilled in the art should understand that the above descriptions are only some specific embodiments of the present invention, rather than all embodiments.

Claims

1. A moisture and heat resistant UV adhesive, characterized in that: The invention comprises the following components by weight: 50-65 parts by weight of bisphenol A epoxy resin, 20-26 parts by weight of methyl methacrylate, 15-25 parts by weight of butyl acrylate, 2-5 parts by weight of 1H,1H,2H,2H-perfluorooctyl acrylate, 1-2 parts by weight of hydroquinone polymerization inhibitor, 2-4 parts by weight of imidazole auxiliary agent, 2-3 parts by weight of modified benzoxazine, and 1-4 parts by weight of photoinitiator 184; The preparation method of the imidazole-based auxiliary agent is: S1. 10-12 mmol of 4,4'-dihydroxybenzophenone and 3.01-3.02 mL of triethylamine were added to 85-100 mL of anhydrous dichloromethane solvent, stirred in an ice bath, and then 20-22 mmol of diphenyl chlorophosphate was added thereto. The reaction was carried out at 1-2°C for 20-30 min. After the reaction was completed, the mixture was extracted three times with deionized water and dichloromethane. The organic phase was dried over anhydrous sodium sulfate and the solvent was removed under reduced pressure to obtain intermediate 1. 9-10 mmol of intermediate 1 and 90-100 mL of ethanol were added to a reactor, stirred in an ice water bath, and 6.5-6.7 mmol of sodium borohydride was added. The reaction was stirred at 1-3°C for 4-6 h. After the reaction was completed, a small amount of deionized water was added to quench the reaction. The ethanol was removed under reduced pressure and the mixture was extracted three times with deionized water and dichloromethane. The organic phase was dried over anhydrous sodium sulfate and the solvent was removed to obtain intermediate 2. S2. 1-isopropyl-2-trifluoromethyl-1H-benzimidazole-5-carbonyl chloride and intermediate 2 were added to anhydrous dichloromethane solvent, stirred and mixed, and pyridine catalyst was added thereto. The reaction was continued for 4-7 hours. After the reaction, cold water was added, extracted with ethyl acetate, dried with anhydrous magnesium sulfate, and then filtered, concentrated under reduced pressure, and purified by chromatography to obtain an imidazole-containing auxiliary agent; The preparation method of the modified benzoxazine is: Step 1: Add magnolol, paraformaldehyde, and furfurylamine to a toluene solvent and react at 110-120°C for 6-8 hours. After reaction, wash the mixture with 1 mol / L sodium hydroxide solution three times, then with distilled water three times, and remove the solvent by rotary evaporation to obtain a crude product, which is then recrystallized from ethanol to obtain alkenylbenzoxazine. Step 2: Add alkenylbenzoxazine to N,N-dimethylformamide solvent, stir and disperse, then add mercaptoethylamine and benzoin dimethyl ether photoinitiator, irradiate with 365nm ultraviolet light at 20-40°C for 20-40 minutes, centrifuge, wash and dry to obtain modified benzoxazine.

2. The heat-resistant UV adhesive according to claim 1, characterized in that: The usage ratio of anhydrous dichloromethane solvent, 1-isopropyl-2-trifluoromethyl-1H-benzimidazole-5-carbonyl chloride, intermediate 2, and pyridine catalyst in S2 is 45-55 mL: 0.8-0.9 mmol: 0.74-0.82 mmol: 0.012-0.015 mmol.

3. The moisture-heat-resistant UV adhesive according to claim 1, characterized in that: The reaction temperature in S2 is 0-5°C.

4. The moisture-heat-resistant UV adhesive according to claim 1, characterized in that: In the step 1, the usage ratio of magnolol, paraformaldehyde, furfurylamine, and toluene solvent is 1-1.02 mmol: 1.94-2.2 mmol: 0.9-1 mmol: 30-40 mL.

5. The moisture-heat-resistant UV adhesive according to claim 1, characterized in that: In the step 2, the usage ratio of N,N-dimethylformamide solvent, alkenylbenzoxazine, mercaptoethylamine, and benzoin dimethyl ether photoinitiator is 35-45 mL: 1.2-1.3 mmol: 0.65-0.78 mmol: 0.02-0.03 mmol.

6. A process for preparing the moisture-heat-resistant UV adhesive according to any one of claims 1 to 5, characterized in that: The preparation method of the moisture-heat-resistant UV adhesive comprises the following steps: adding bisphenol A epoxy resin into a reaction kettle, heating the mixture to 80-95° C., stirring the mixture, continuously adding methyl methacrylate, butyl acrylate, 1H,1H,2H,2H-perfluorooctyl acrylate, hydroquinone polymerization inhibitor, imidazole-based auxiliary agent, and modified benzoxazine, stirring the mixture for 30-40 minutes, continuously adding photoinitiator 184, stirring the mixture for 30-45 minutes under light-shielding conditions, and obtaining the moisture-heat-resistant UV adhesive.

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