Waterproof pressure-sensitive adhesive tape and production process thereof

Abstract

The invention discloses a waterproof pressure-sensitive adhesive tape and a production process thereof, and relates to the technical field of pressure-sensitive adhesives. The production process of the waterproof pressure-sensitive adhesive tape at least comprises the following steps: uniformly stirring 2-ethylhexyl acrylate, n-butyl acrylate, methyl methacrylate, acrylic acid, hydroxyethyl acrylate, a polymerizable catechol monomer and a solvent, and adding an initiator to react to obtain an acrylate copolymer solution; uniformly mixing fluorine-containing side chain diisocyanate and a catalyst, and dropwise adding the mixture into the acrylate copolymer solution for reaction to obtain a pressure-sensitive adhesive; mixing the pressure-sensitive adhesive solution with a curing agent, defoaming, coating on a base film, drying and curing to obtain the waterproof pressure-sensitive adhesive tape. The waterproof pressure-sensitive adhesive tape prepared by the invention has the characteristics of strong viscosity and good waterproofness.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure - sensitive adhesives, and particularly to a waterproof pressure - sensitive tape and its production process. Background Art

[0002] In daily life and industrial production, adhesives are often used for the fixation and connection of parts and articles. Compared with traditional mechanical fixation methods, adhesive bonding has obvious advantages such as continuous stress distribution, low cost, light weight, and low working temperature. A pressure - sensitive adhesive is a special viscoelastic material that is sensitive to pressure and has self - adhesive properties. When in use, the pressure - sensitive tape is covered on the surface of the adherend substrate. Without the aid of external means such as solvents or heating, the bonding effect can be adjusted by controlling the pressure applied to it. When the pressure - sensitive adhesive contacts the surface of the substrate, a dense bonding surface will be formed. Since a strong flow resistance is generated during the separation from the substrate, it will not damage the structure of the bonding surface and can be used repeatedly. Thanks to the adjustable adhesiveness and ease of use, pressure - sensitive adhesives have a wide range of applications in many fields such as daily life, medical treatment, and aerospace applications.

[0003] Classified by monomer materials, pressure - sensitive adhesives are mainly divided into: polyurethane - based pressure - sensitive adhesives, acrylate - based pressure - sensitive adhesives, silicone - based pressure - sensitive adhesives, and epoxy - resin - based pressure - sensitive adhesives. Among them, acrylate - based pressure - sensitive adhesives are the most important and widely used type of pressure - sensitive adhesives. Acrylate pressure - sensitive adhesives are a unique type of adhesive formed by the polymerization of double bonds. During use, a firm bond can be achieved without applying a large amount of pressure in a short time. They have advantages such as a large variety of synthetic monomers, high transparency, and good aging resistance. Therefore, acrylate pressure - sensitive adhesives have developed rapidly, and the number of products has increased significantly in recent years, occupying a large market in the adhesive field. However, traditional acrylate polymer pressure - sensitive adhesives have a relatively high water vapor transmission rate (WVTR) due to the presence of polar groups and are difficult to adhere to wet surfaces, which greatly limits their wide application in the fields of power and electronic equipment. Therefore, the existing acrylate pressure - sensitive adhesives have defects such as poor waterproof performance and poor and non - durable adhesion on wet surfaces, which severely restricts the use of this technology. Summary of the Invention

[0004] The purpose of the present invention is to provide a waterproof pressure - sensitive tape and its production process to solve the following technical problems:

[0005] The existing acrylate pressure - sensitive adhesives have problems of poor waterproof performance and poor and non - durable adhesion on wet surfaces.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A production process of a waterproof pressure - sensitive tape includes at least the following steps:

[0008] Stir isooctyl acrylate, n-butyl acrylate, methyl methacrylate, acrylic acid, 2-hydroxyethyl acrylate, polymerizable catechol monomer and solvent evenly, add initiator and react to obtain an acrylate copolymer solution;

[0009] Mix fluorinated side chain diisocyanate and catalyst evenly, dropwise add into the acrylate copolymer solution and react to obtain a pressure-sensitive adhesive solution;

[0010] Mix the pressure-sensitive adhesive solution with a curing agent, defoam and coat it on a base film, dry and cure to obtain a waterproof pressure-sensitive tape.

[0011] As a further scheme of the present invention: the mass ratio of isooctyl acrylate, n-butyl acrylate, methyl methacrylate, 2-hydroxyethyl acrylate, acrylic acid, polymerizable catechol monomer, initiator and solvent is 50-60:10-20:5-10:5-15:2-5:2-5:0.5-1:40-50, the solvent is ethyl acetate, the initiator is a mixture of benzoyl peroxide and azobisisobutyronitrile, and the mass ratio of benzoyl peroxide and azobisisobutyronitrile is 3:1.

[0012] As a further scheme of the present invention: the mass ratio of the acrylate copolymer solution and the fluorinated side chain diisocyanate is 10:0.5-1, and the catalyst is dibutyltin dilaurate.

[0013] As a further scheme of the present invention: the coating thickness is 15-20 μm, the drying temperature is 100 °C and the time is 2-5 min, and the curing temperature is 60 °C and the time is 70-80 h.

[0014] As a further scheme of the present invention: the preparation method of the fluorinated side chain diisocyanate includes the following steps:

[0015] Dissolve tridecafluorooctanol in a solvent to obtain a fluorinated alcohol mixed solution;

[0016] Mix hexamethylene diisocyanate trimer and butyl acetate evenly, add dibutyltin dilaurate and the fluorinated alcohol mixed solution, and react to obtain a fluorinated side chain diisocyanate.

[0017] As a further scheme of the present invention: the mass ratio of hexamethylene diisocyanate trimer and butyl acetate is 1:1-2, and the molar ratio of hexamethylene diisocyanate trimer and tridecafluorooctanol is 1:1-1.5.

[0018] As a further scheme of the present invention: the preparation method of the polymerizable catechol monomer at least includes the following steps:

[0019] Dissolve sodium tetraborate decahydrate and sodium bicarbonate in deionized water, then add levodopa and methacryloyl chloride - tetrahydrofuran solution, adjust the pH to 9, react under a nitrogen environment, filter, wash, extract and dry to obtain a polymerizable catechol monomer.

[0020] As a further aspect of the present invention: The mass ratio of the levodopa to the methacryloyl chloride is 4:2 - 3.

[0021] As a further aspect of the present invention: The curing agent is an isophorone diisocyanate curing agent, the content of the curing agent accounts for 0.3% - 0.8% of the mass of the pressure - sensitive adhesive solution, and the base film is any one of a PET film, a PE film, a PI film, a PVC film, a fabric or a metal foil.

[0022] A waterproof pressure - sensitive tape is obtained by the production process of the waterproof pressure - sensitive tape described in any one of the above.

[0023] The beneficial effects of the present invention:

[0024] In the present invention, isooctyl acrylate, n - butyl acrylate, methyl methacrylate, acrylic acid, 2 - hydroxyethyl acrylate and polymerizable catechol monomer are used as main polymerization monomers, and fluorine - containing side - chain diisocyanate is used as a graft monomer to synthesize a polyacrylate pressure - sensitive adhesive, thereby preparing a waterproof pressure - sensitive tape. In the present invention, isooctyl acrylate and n - butyl acrylate provide flexibility and adhesiveness, methyl methacrylate increases hardness and weather resistance, 2 - hydroxyethyl acrylate has a hydroxyl group that can participate in cross - linking or further reactions, acrylic acid provides a carboxyl group for cross - linking or grafting, the polymerizable catechol monomer introduces a catechol structure, and the fluorine - containing side - chain diisocyanate introduces a fluorine - containing chain segment. The obtained pressure - sensitive tape has multiple advantages such as high dry and wet adhesion, durability and stability, hydrophobicity and antibacterial properties, breaking through the environmental limitations of traditional pressure - sensitive adhesives, and having broad application prospects in the fields of medicine, electronics, industry, etc.

[0025] In the present invention, levodopa containing a catechol structure reacts with methacryloyl chloride through an amidation reaction to prepare a polymerizable monomer containing a catechol structure. Based on the carbon - carbon double bond of the polymerizable catechol monomer, the catechol structure is introduced into the acrylate pressure - sensitive adhesive, significantly improving the dry initial adhesion and peel strength of the product. Through hydrogen bonding and coordination, strong adhesion can also be achieved in a wet or underwater environment, significantly improving the adhesion ability and paste stability of the pressure - sensitive adhesive on a wet surface. At the same time, the phenolic hydroxyl group of catechol can scavenge free radicals, delay oxidative degradation, improve the service life of the pressure - sensitive tape, and the polar hydroxyl group of catechol can bind to polar surfaces such as metals and glasses.

[0026] The present invention uses tridecafluorooctanol containing a long fluorocarbon chain segment to react with hexamethylene diisocyanate trimer to prepare a fluorinated side-chain diisocyanate. By controlling the reaction temperature, the side reaction of phenolic hydroxyl groups is inhibited. Then, the isocyanate groups of the fluorinated side-chain diisocyanate react with the hydroxyl groups of 2-hydroxyethyl acrylate, grafting the fluorinated chain segment onto the polymer backbone of the pressure-sensitive adhesive, thereby improving the waterproofness, high-temperature resistance, adhesiveness, and stain resistance of the pressure-sensitive tape. The catechol group introduced in the present invention achieves strong adhesion in a wet or underwater environment through hydrogen bonding and coordination. The hydrophobicity of the fluorinated chain segment can repel water, avoid interference from the interfacial water film, synergistically enhance the bonding strength in a humid environment, and prevent water molecules from penetrating into the pressure-sensitive tape, which may otherwise cause the crosslinked system to gradually swell or even be damaged, thus extending the service life of the pressure-sensitive tape. At the same time, the fluorinated chain segment reduces the surface energy, can adhere to non-polar materials, and synergistically with the catechol group, expands the application range. The waterproof pressure-sensitive tape prepared in the present invention can adhere to dry / wet surfaces and maintain sufficient firmness and durability. Meanwhile, the acrylate backbone provides flexibility, the fluorinated chain segment enhances the cohesive strength, and the catechol group improves the interfacial adhesion, achieving high peel strength and low residual glue. Detailed Embodiments

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] The preparation method of the polymerizable catechol monomer in Example 1 includes at least the following steps:

[0029] Dissolve 20 g of sodium tetraborate decahydrate and 10 g of sodium bicarbonate in 200 mL of deionized water. After introducing nitrogen and stirring for 30 min, add 10 g of L-dopa and continue stirring until it becomes clear and transparent. Under nitrogen protection, add a mixed solution of 6.5 g of methacryloyl chloride and 50 mL of tetrahydrofuran to the reaction solution, and dropwise add 1.5 mol / L sodium hydroxide solution to adjust the pH to 9. After the addition is complete, under the condition of introducing nitrogen at 30 °C, continuously stir and react for 12 h. After the reaction is completed, filter and wash with ethyl acetate. Adjust the filtrate to pH 1.5 with 2 mol / L sulfuric acid, extract with ethyl acetate, and collect the upper organic phase. Then wash with 50 mL of deionized water, dry with 5 g of anhydrous magnesium sulfate to remove water, and then rotary evaporate at low temperature to about 50 mL. Finally, dry in vacuo at 70 °C to obtain the product polymerizable catechol monomer.

[0030] The preparation method of the fluorinated side-chain diisocyanate in Example 2 includes at least the following steps:

[0031] Dissolve 35.5 g of tridecafluorooctanol in an equal mass of butyl acetate to obtain a fluoroalcohol mixed solution;

[0032] Mix 100 g of hexamethylene diisocyanate trimer and 100 g of butyl acetate evenly, add the catalyst dibutyltin dilaurate and the above-mentioned fluoroalcohol mixed solution, control the system temperature at 40 °C for reaction until the content of residual -NCO groups ≤ 1%, remove the solvent and unreacted fluoroalcohol by vacuum distillation, and after cooling the reaction system to ambient temperature, obtain a fluorinated side-chain diisocyanate.

[0033] The production process of the waterproof pressure-sensitive tape in Example 3 includes the following steps:

[0034] Mix 12 parts by mass of isooctyl acrylate, 4 parts by mass of n-butyl acrylate, 2 parts by mass of methyl methacrylate, 2 parts by mass of 2-hydroxyethyl acrylate and 1 part by mass of the polymerizable catechol monomer prepared in Example 1 with 3 parts by mass of acrylic acid, 0.2 part by mass of initiator, and 50 parts by mass of the solvent ethyl acetate evenly, introduce nitrogen protection, raise the temperature in the reaction flask to 75 °C, heat and react for 30 min, then mix 0.4 part by mass of initiator with 48 parts by mass of isooctyl acrylate, 16 parts by mass of n-butyl acrylate, 8 parts by mass of methyl methacrylate, 8 parts by mass of 2-hydroxyethyl acrylate, and 4 parts by mass of the polymerizable catechol monomer prepared in Example 1 evenly, and slowly add dropwise (completed within 120 min) with a peristaltic pump. After the addition is completed, keep the temperature for reaction for 3 h, then dissolve 0.2 part by mass of initiator in ethyl acetate and add it all at once, keep the temperature for reaction for 2 h to obtain an acrylate copolymer solution with a solid content of 40%. Among them, the initiator is a mixture of benzoyl peroxide and azobisisobutyronitrile with a mass ratio of 3:1;

[0035] Control the temperature of 100 g of the acrylate copolymer solution prepared above at 30 °C, mix 5 g of the fluorinated side-chain diisocyanate prepared in Example 2 and 1.5 wt‰ of the catalyst dibutyltin dilaurate based on the amount of graft monomer evenly, and slowly add dropwise to the acrylate copolymer solution. The dropping time is 15 min, and then keep the temperature unchanged and continue to react for 5 h until the NCO peak disappears to obtain a pressure-sensitive adhesive solution;

[0036] Mix the pressure-sensitive adhesive solution prepared above and isophorone diisocyanate curing agent in a mass ratio of 100:0.5, stir to defoam and then coat on a base film, dry and cure to obtain a waterproof pressure-sensitive tape, where the coating thickness is 20 μm, the drying temperature is 100 °C and the time is 2 min, and the curing temperature is 60 °C and the time is 72 h.

[0037] The production process of the waterproof pressure-sensitive tape in Example 4 includes the following steps:

[0038] 12 parts by mass of isooctyl acrylate, 4 parts by mass of n-butyl acrylate, 2 parts by mass of methyl methacrylate, 2.4 parts by mass of hydroxyethyl acrylate and 0.8 parts by mass of the polymerizable catechol monomer prepared in Example 1 were uniformly mixed with 2 parts by mass of acrylic acid, 0.2 parts by mass of initiator and 50 parts by mass of solvent ethyl acetate, and nitrogen was introduced for protection. The temperature in the reaction bottle was raised to 75°C and heated for reaction for 30 minutes. Then 0.4 parts by mass of initiator and 48 parts by mass of isooctyl acrylate, 16 parts by mass of n-butyl acrylate, 8 parts by mass of methyl methacrylate, 9.6 parts by mass of hydroxyethyl acrylate, and 3.2 parts by mass of the polymerizable catechol monomer prepared in Example 1 were uniformly mixed, and then slowly added dropwise using a peristaltic pump (120 minutes for the addition to be completed). After the addition was completed, the mixture was kept warm for 3 hours, and then 0.2 parts by mass of the initiator was dissolved in ethyl acetate as a solvent and added at once. The mixture was kept warm for 2 hours to obtain an acrylate copolymer solution with a solid content of 40%, wherein the initiator was a mixture of benzoyl peroxide and azobisisobutyronitrile in a mass ratio of 3:1;

[0039] The temperature of 100 g of the acrylate copolymer solution prepared above was controlled at 30° C. 6 g of the fluorinated side chain diisocyanate prepared in Example 2 and 1.5 wt‰ of the grafting monomer catalyst dibutyltin dilaurate were uniformly mixed and slowly added dropwise to the acrylate copolymer solution for 15 min. The temperature was then kept constant and the reaction was continued for 5 h until the NCO peak disappeared to obtain a pressure-sensitive adhesive solution.

[0040] The pressure-sensitive adhesive solution prepared above and the isophorone diisocyanate curing agent were mixed in a mass ratio of 100:0.5, stirred and defoamed, and then coated on the base film, dried and matured to obtain a waterproof pressure-sensitive adhesive tape, wherein the coating thickness was 20 μm, the drying temperature was 100° C., the time was 2 min, and the maturation temperature was 60° C., and the time was 72 h.

[0041] Comparative Example 1 Compared with Example 3, in the preparation step of the acrylate copolymer solution, the polymerizable catechol monomer prepared in Example 1 is not added, and the other components and preparation method are completely consistent with Example 4.

[0042] Comparative Example 2 The production process of the waterproof pressure-sensitive adhesive tape comprises the following steps:

[0043] Mix 12 parts by mass of isooctyl acrylate, 4 parts by mass of n-butyl acrylate, 2 parts by mass of methyl methacrylate, 2 parts by mass of 2-hydroxyethyl acrylate, and 1 part by mass of the polymerizable catechol monomer prepared in Example 1 with 3 parts by mass of acrylic acid, 0.2 part by mass of an initiator, and 50 parts by mass of ethyl acetate as a solvent uniformly. Introduce nitrogen for protection, raise the temperature in the reaction flask to 75 °C, and heat and react for 30 min. Then, uniformly mix 0.4 part by mass of the initiator with 48 parts by mass of isooctyl acrylate, 16 parts by mass of n-butyl acrylate, 8 parts by mass of methyl methacrylate, 8 parts by mass of 2-hydroxyethyl acrylate, and 4 parts by mass of the polymerizable catechol monomer prepared in Example 1, and slowly add the mixture dropwise using a peristaltic pump (the addition is completed within 120 min). After the addition is completed, keep the temperature for reaction for 3 h. Then, dissolve 0.2 part by mass of the initiator in ethyl acetate as a solvent and add it all at once, and keep the temperature for reaction for 2 h to obtain an acrylate copolymer solution with a solid content of 40%. Among them, the initiator is a mixture of benzoyl peroxide and azobisisobutyronitrile with a mass ratio of 3:1;

[0044] Mix the acrylate copolymer solution prepared above and an isophorone diisocyanate curing agent in a mass ratio of 100:0.5, stir to defoam, and then coat it on a base film, dry and cure it to obtain a waterproof pressure-sensitive tape. Among them, the coating thickness is 20 μm, the drying temperature is 100 °C, the drying time is 2 min, and the curing temperature is 60 °C, and the curing time is 72 h.

[0045] Compared with Comparative Example 2, in Comparative Example 1, the polymerizable catechol monomer prepared in Example 1 is not added in the preparation step of the acrylate copolymer solution, and the remaining components and preparation methods are exactly the same as those in Comparative Example 2.

[0046] Performance testing

[0047] Water absorption rate test: Cut the pressure-sensitive tapes obtained in Examples 3-4 and Comparative Examples 1-3 into pieces of 20 mm × 20 mm, weigh and record as m 0 . Immerse the specimens in deionized water at room temperature for 24 hours, then take them out and wipe off the water on the surface of the samples, weigh and record as m 1 . Test each group of pressure-sensitive tapes three times and take the average value; the test results are shown in Table 1; the calculation formula for the water absorption rate of the pressure-sensitive tape is as follows: Curing film water absorption rate = (m 1 - m 0 ) / m 0 × 100%

[0048] Among them, m 0 is the mass of the cured film specimen, g; m 1 is the mass of the cured film specimen after soaking, g.

[0049] High-temperature resistance test: Cut the pressure-sensitive tapes obtained in Examples 3-4 and Comparative Examples 1-3 into pieces of 50 mm × 50 mm. Remove the release film and stick them on a clean stainless steel plate. Roll them back and forth three times with a 2 kg rubber roller, then place them in an oven at 150 °C for 30 min. Subsequently, take them out and cool them to room temperature. Manually peel the pressure-sensitive adhesive and observe the residual adhesive situation of the pressure-sensitive tape; the test results are shown in Table 1;

[0050] Adhesion retention: Test according to the national standard GB / T4851-2014 using the CZY-GS produced by Bomei Company. Cut the pressure-sensitive tapes obtained in Examples 3-4 and Comparative Examples 1-3 into pressure-sensitive tapes with a width of 25 mm and a length of 100 mm. After removing the release film, align the upper end with the marking line and attach it to the test plate and the loading plate. The bonding length of the loading plate is 45 mm, and the bonding length of the test plate is 25 mm. Use a 2 kg pressure roller to roll back and forth 3 times, cut off the excess length, then hang the upper end of the test sample on the testing instrument and hang a 1 kg weight at the lower end, and record the time when the test plate drops to test the dry adhesion retention; Immerse the cut pressure-sensitive tape in water for 20 min, press the tape onto the standard steel plate underwater, and paste it underwater for 20 min. Take it out and hang the upper end of the test sample on the testing instrument to test the wet adhesion retention; The dropping time represents the adhesion retention of the acrylate pressure-sensitive adhesive. Each group of samples is tested in parallel 3 times and the average value is taken; the test results are shown in Table 1;

[0051] 180° peel strength test: Test according to the national standard GB / T2792-2014 using the AR-1000 produced by American Chemical Instrument Company. Cut the pressure-sensitive tapes obtained in Examples 3-4 and Comparative Examples 1-3 into pressure-sensitive tapes with a width of 25 mm and a length of 300 mm, adhere them to a clean stainless steel plate, and roll them back and forth 3 times with a 2 kg pressure roller, then place them in an environment at 25 °C for 20 min to test the dry adhesion 180° peel strength; Immerse the cut pressure-sensitive tape in water for 20 min, press the tape onto the standard steel plate underwater, and paste it underwater for 20 min to test the wet adhesion 180° peel strength; The moving speed of the stainless steel plate is 300 mm / min, and the average force during the peeling process is used as the peel strength of the pressure-sensitive adhesive. Each group of samples is measured three times and the average value is taken; the test results are shown in Table 1.

[0052] Table 1: Statistical table of performance test data of specimens in examples and comparative examples

[0053]

[0054] As can be seen from Table 1, the waterproof pressure-sensitive tape prepared by the present invention has low water absorption, heat resistance and high waterproofness, and has a firm and lasting adhesion on both dry and wet surfaces. In Comparative Example 1, the catechol structure was not introduced, and the water absorption rate of the obtained pressure-sensitive tape decreased, but the adhesion time and viscosity strength in a humid environment decreased. In Comparative Example 2, the long fluorocarbon side chain was not introduced, and the water absorption rate of the obtained pressure-sensitive tape increased, the heat resistance became poor, and the adhesion performance in a humid environment also decreased. The pressure-sensitive tape obtained in Comparative Example 3 was a blank control, and all tests showed poor performance.

[0055] The above has described in detail an embodiment of the present invention, but the content described is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention application should still fall within the scope covered by the patent of the present invention.

Claims

1. A production process for a waterproof pressure-sensitive adhesive tape, characterized in that: At least the following steps are included: Isooctyl acrylate, n-butyl acrylate, methyl methacrylate, acrylic acid, hydroxyethyl acrylate, a polymerizable catechol monomer and a solvent are stirred uniformly, and an initiator is added to react to obtain an acrylate copolymer solution; Evenly mixing the fluorinated side chain diisocyanate and the catalyst, and adding the mixture dropwise into the acrylate copolymer solution to react, thereby obtaining a pressure-sensitive adhesive solution; The pressure-sensitive adhesive liquid is mixed with a curing agent, coated on a base film after defoaming, dried and aged to obtain a waterproof pressure-sensitive adhesive tape.

2. The production process of a waterproof pressure-sensitive adhesive tape according to claim 1, characterized in that: The mass ratio of the isooctyl acrylate, the n-butyl acrylate, the methyl methacrylate, the hydroxyethyl acrylate, the acrylic acid, the polymerizable catechol monomer, the initiator and the solvent is 50-60:10-20:5-10:5-15:2-5:2-5:0.5-1:40-50, the solvent is ethyl acetate, the initiator is a mixture of benzoyl peroxide and azobisisobutyronitrile, and the mass ratio of the benzoyl peroxide to the azobisisobutyronitrile is 3:

1.

3. The production process of a waterproof pressure-sensitive adhesive tape according to claim 1, characterized in that: The mass ratio of the acrylic copolymer solution to the fluorine-containing side chain diisocyanate is 10:0.5-1, and the catalyst is dibutyltin dilaurate.

4. The production process of a waterproof pressure-sensitive adhesive tape according to claim 3, characterized in that: The coating thickness is 15-20 μm, the drying temperature is 100° C., the time is 2-5 min, and the aging temperature is 60° C., the time is 70-80 h.

5. The production process of a waterproof pressure-sensitive adhesive tape according to claim 1, characterized in that: The preparation method of the fluorinated side chain diisocyanate comprises the following steps: dissolving tridecafluorooctanol in a solvent to obtain a fluoroalcohol mixed solution; After the hexamethylene diisocyanate trimer and butyl acetate are uniformly mixed, dibutyltin dilaurate and the fluoroalcohol mixed solution are added, and the fluorine-containing side chain diisocyanate is obtained after the reaction.

6. The production process of a waterproof pressure-sensitive adhesive tape according to claim 5, characterized in that: The mass ratio of the hexamethylene diisocyanate trimer to the butyl acetate is 1:1-2, and the molar ratio of the hexamethylene diisocyanate trimer to the tridecafluorooctanol is 1:1-1.

5.

7. The production process of a waterproof pressure-sensitive adhesive tape according to claim 1, characterized in that: The preparation method of the polymerizable catechol monomer comprises at least the following steps: Sodium tetraborate decahydrate and sodium bicarbonate are dissolved in deionized water, and then a tetrahydrofuran solution of levodopa and methacryloyl chloride is added, and the pH value is adjusted to 9. After reacting under a nitrogen environment, the reaction is filtered, washed, extracted and dried to obtain a polymerizable catechol monomer.

8. The production process of a waterproof pressure-sensitive adhesive tape according to claim 7, characterized in that: The mass ratio of the levodopa to the methacryloyl chloride is 4:2-3.

9. The production process of a waterproof pressure-sensitive adhesive tape according to claim 1, characterized in that: The curing agent is isophorone diisocyanate curing agent, the content of which accounts for 0.3%-0.8% of the mass of the pressure-sensitive adhesive liquid, and the base film is any one of PET film, PE film, PI film, PVC film, fabric or metal foil.

10. A waterproof pressure-sensitive adhesive tape, characterized in that: The waterproof pressure-sensitive adhesive tape is prepared by the production process of any one of claims 1 to 9.

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