Waterproof and oil-proof high-tack adhesive and preparation method thereof

Abstract

The application discloses a waterproof and oil-proof high-viscosity adhesive and a preparation method thereof, and relates to the technical field of adhesives. The application carries out cation exchange among modified polyacrylic acid emulsion montmorillonite interlayers, improves the dispersibility and stability of the montmorillonite, participates in the construction of the three-dimensional network structure among polyvinyl acetate polymer molecules together with vinyltriethoxysilane, enhances the cohesion and tensile strength of the adhesive, and introduces Si-O-Si bonds, further improves the waterproof and oil-proof performance and strength of the adhesive. The modified polyacrylic acid emulsion is prepared by emulsion copolymerization of N-hexyl-N-methyl acryloyloxy-N,N-dimethylammonium bromide, (1-allyl-1H-benzimidazole-2-yl)methanol and acrylic acid; the longer chain segment is introduced, so that water molecules are repelled outside the material surface, and the waterproof and oil-proof performance of the adhesive is enhanced; benzimidazole can form a protective film on the bonding surface, prevents oxygen, water and other media from contacting, and thus realizes the waterproof and oil-proof effect.

Description

Technical Field

[0001] This invention relates to the field of adhesive technology, specifically to a waterproof and oil-resistant high-viscosity adhesive and its preparation method. Background Technology

[0002] Polyvinyl acetate (PVAc) emulsion, commonly known as "white glue," is widely used in numerous fields, including architectural coatings, wood bonding, paper processing, textile printing and dyeing, cement modification, fiberglass processing, and home decoration. PVAc emulsion is inexpensive and has a relatively simple polymerization process. It is non-toxic, odorless, tasteless, colorless, and transparent, and possesses excellent adhesion, light resistance, and resistance to aging. As a water-based adhesive, it offers significant advantages over solvent-based adhesives in terms of being green, energy-saving, and environmentally friendly.

[0003] However, PVAc also has drawbacks such as poor water and oil resistance and low viscosity. PVAc emulsion films easily absorb water and experience a sharp decrease in adhesive strength when immersed in high humidity or water. To enable the application of PVAc emulsions in various fields, they are usually modified, such as through blending, copolymerization, crosslinking, and modification with protective colloids, to meet specific performance requirements. Since the 1980s, domestic and international scholars have conducted extensive research on the protective colloids and initiators used in PVAc emulsion polymerization, aiming to prepare water-resistant polyvinyl acetate emulsions without affecting their coating properties, stability, or other characteristics. Therefore, developing a PAVc emulsion with good water and oil resistance has become a growing trend. Summary of the Invention

[0004] The purpose of this invention is to provide a waterproof and oil-resistant high-viscosity adhesive and its preparation method, so as to solve the problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a waterproof and oil-resistant high-viscosity adhesive, wherein the waterproof and oil-resistant high-viscosity adhesive comprises, by weight, 8-14 parts of composite modified polyacrylic acid emulsion, 45-55 parts of vinyl acetate, 0.5-1.5 parts of ammonium persulfate, 0.1-0.3 parts of preservative, 2-6 parts of film-forming aid, and 44-62 parts of deionized water.

[0006] Furthermore, the composite modified polyacrylic acid emulsion is prepared by combining modified polyacrylic acid emulsion with montmorillonite and vinyltriethoxysilane.

[0007] Furthermore, the modified polyacrylic acid emulsion is prepared by emulsion copolymerization of N-hexyl-N-methacryloyloxy-N,N-dimethylaminoammonium bromide, (1-allyl-1H-benzimidazol-2-yl)methanol and acrylic acid.

[0008] Furthermore, a method for preparing a waterproof, oil-resistant, and highly viscous adhesive includes the following preparation steps:

[0009] (1) Mix 2-6 parts of N-hexyl-N-methacryloyloxy-N,N-dimethylaminoammonium bromide, 5-9 parts of (1-allyl-1H-benzimidazol-2-yl)methanol and 24-50 parts of acrylic acid to obtain a mixture. Take out 1 / 3 of the mixture and add it dropwise to 0.4 parts of emulsifier at a rate of 1 drop / s under stirring at 70-80℃ and 200rpm. Add 0.05-0.09 parts of sodium bicarbonate and react for 20-40min. Then add the remaining 2 / 3 of the mixture and 0.6 parts of emulsifier at a rate of 3 drops / s. Stir at 300rpm for 2-4h and cool naturally to room temperature. Adjust the pH value to 6-7 with sodium carbonate aqueous solution to obtain modified polyacrylic acid emulsion.

[0010] (2) Stir 7-15 parts of montmorillonite and 16-24 parts of modified polyacrylic acid emulsion at 60-90℃ and 800rpm for 12-18h, add 8-18 parts of hydrolyzed vinyltriethoxysilane and 1-3 parts of ammonium persulfate, continue stirring for 10-16h, adjust the pH of the solution to 6-8 with 10wt% ammonia water, and obtain the composite modified polyacrylic acid emulsion;

[0011] (3) Mix 8-14 parts of composite modified polyacrylic acid emulsion, 45-55 parts of vinyl acetate, 0.5-1.5 parts of ammonium persulfate, 0.1-0.3 parts of preservative, 2-6 parts of film-forming aid, and 44-62 parts of deionized water at 80-90℃ and 300rpm for 3-7 hours, and let it cool naturally to room temperature to obtain a waterproof and oil-proof high-viscosity adhesive.

[0012] Further, the preparation steps of the emulsifier in step (1) are as follows: 54-76 parts of deionized water, 1.5-2.1 parts of sodium dodecyl sulfate, 0.8-1.4 parts of octylphenyl polyoxyethylene ether, and 0.1-0.3 parts of ammonium persulfate are mixed at 300 rpm for 10-20 min to obtain the emulsifier.

[0013] Furthermore, the sodium carbonate content in the sodium carbonate aqueous solution described in step (1) is 5 wt%.

[0014] Further, the preparation steps of the hydrolyzed vinyltriethoxysilane in step (2) are as follows: 1-5 parts of vinyltriethoxysilane and 6-40 parts of ethanol are mixed evenly, the pH value of the solution is adjusted to 3-4 with hydrochloric acid aqueous solution, 3-25 parts of deionized water are added, and the mixture is stirred at 30-50℃ and 100rpm for 0.5-2.5h, naturally cooled to room temperature, and the pH value is adjusted to 7-8 with 10wt% ammonia water to obtain the hydrolyzed vinyltriethoxysilane.

[0015] Furthermore, the concentration of hydrochloric acid in the hydrochloric acid aqueous solution is 1 mol / L.

[0016] Furthermore, the preservative mentioned in step (3) is any one or a mixture of sodium benzoate, methylisothiazolinone, and potassium sorbate.

[0017] Furthermore, the film-forming aid in step (3) is any one or a mixture of dibutyl phthalate, dioctyl adipate, and ethylene glycol.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0019] This invention utilizes cation exchange between modified polyacrylic acid emulsion and montmorillonite layers to allow organic groups to cover the surface of montmorillonite or insert into its interlayer, increasing the interlayer spacing and improving the dispersibility and stability of montmorillonite. This enables it to form physical crosslinking points in the adhesive, participating in the construction of the three-dimensional network structure between modified polyacrylic acid and polyvinyl acetate polymer molecules together with vinyltriethoxysilane. This enhances the cohesive force and tensile strength of the adhesive, and allows it to absorb moisture from the adhesive, forming a gel structure and increasing the adhesive's viscosity. Furthermore, the introduction of Si-O-Si bonds into the adhesive further improves its waterproof and oil-repellent properties and strength.

[0020] The modified polyacrylic acid emulsion is prepared by emulsion copolymerization of N-hexyl-N-methacryloyloxy-N,N-dimethylaminoammonium bromide, (1-allyl-1H-benzimidazole-2-yl)methanol and acrylic acid. By introducing longer chain segments, the larger spatial volume generates a steric hindrance effect, making it difficult for water molecules to break through the carbon chain barrier of long-chain alkanes, thus being repelled from the material surface, thereby enhancing the waterproof and oil-proof properties of the adhesive. The benzimidazole in (1-allyl-1H-benzimidazole-2-yl)methanol can form a protective film on the bonding surface, preventing contact with oxygen, moisture and other media, thereby achieving waterproof and oil-proof effects. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] To more clearly illustrate the method provided by the present invention, the following embodiments are provided in detail. The test methods for various indicators of the waterproof and oil-resistant high-adhesion adhesive prepared in the following embodiments are as follows:

[0023] Bonding strength: Take two pieces of wood of the same size, apply 100g of adhesive per square meter to the corresponding contact surface of each piece of wood, and the size of each contact surface is 90mm*5mm. Then, press the contact surfaces of the two pieces of wood together and apply a pressure of 1Mpa to the contact surface. After placing at room temperature for 24 hours, perform a tensile shear test.

[0024] Water resistance: Take two pieces of wood of the same size, apply 100g of adhesive per square meter to the corresponding contact surface of each piece of wood, and the size of each contact surface is 90mm*5mm. Then, press the two pieces of wood together with the contact surfaces facing each other, apply 1Mpa pressure to the contact surfaces, place them at room temperature for 24 hours, and then immerse them in 60℃ water to measure the time of glue separation.

[0025] Viscosity: The same mass of the examples and comparative examples were tested in accordance with GB / T 2794-1995.

[0026] Example 1

[0027] (1) Mix 54 parts of deionized water, 1.5 parts of sodium dodecyl sulfate, 0.8 parts of octylphenyl polyoxyethylene ether, and 0.1 parts of ammonium persulfate at 300 rpm for 10 min to prepare an emulsifier;

[0028] (2) Mix 2 parts of N-hexyl-N-methacryloyloxy-N,N-dimethylaminoammonium bromide, 5 parts of (1-allyl-1H-benzimidazol-2-yl)methanol and 24 parts of acrylic acid to obtain a mixture. Take out 1 / 3 of the mixture and add it dropwise to 0.4 parts of emulsifier at a rate of 1 drop / s under stirring at 70℃ and 200 rpm. Add 0.05 parts of sodium bicarbonate and react for 20 min. Then add the remaining 2 / 3 of the mixture and 0.6 parts of emulsifier at a rate of 3 drops / s. Stir at 300 rpm for 2 h and cool naturally to room temperature. Adjust the pH value to 6 with a sodium carbonate aqueous solution with a sodium carbonate content of 5 wt% to obtain a modified polyacrylic acid emulsion.

[0029] (3) Mix 1 part vinyltriethoxysilane and 6 parts ethanol evenly, adjust the pH of the solution to 3 with 1 mol / L hydrochloric acid aqueous solution, add 3 parts deionized water, stir at 30℃ and 100 rpm for 0.5 h, cool naturally to room temperature, adjust the pH to 7 with 10 wt% ammonia water to obtain hydrolyzed vinyltriethoxysilane.

[0030] (4) Stir 7 parts of montmorillonite and 16 parts of modified polyacrylic acid emulsion at 60°C and 800 rpm for 12 h, add 8 parts of hydrolyzed vinyltriethoxysilane and 1 part of ammonium persulfate, continue stirring for 10 h, adjust the pH of the solution to 6 with 10 wt% ammonia water, and obtain composite modified polyacrylic acid emulsion.

[0031] (5) 8 parts of composite modified polyacrylic acid emulsion, 45 parts of vinyl acetate, 0.5 parts of ammonium persulfate, 0.1 parts of sodium benzoate, 2 parts of dibutyl phthalate and 44 parts of deionized water were stirred at 80°C and 300 rpm for 3 hours and then naturally cooled to room temperature to obtain a waterproof and oil-proof high-viscosity adhesive.

[0032] Example 2

[0033] (1) Mix 65 parts of deionized water, 1.8 parts of sodium dodecyl sulfate, 1.1 parts of octylphenyl polyoxyethylene ether, and 0.2 parts of ammonium persulfate at 300 rpm for 15 min to prepare an emulsifier;

[0034] (2) Mix 4 parts of N-hexyl-N-methacryloxy-N,N-dimethylaminoammonium bromide, 7 parts of (1-allyl-1H-benzimidazole-2-yl)methanol and 37 parts of acrylic acid to obtain a mixture. Take out 1 / 3 of the mixture and add it dropwise to 0.4 parts of emulsifier at a rate of 1 drop / s under stirring at 75℃ and 200 rpm. Add 0.07 parts of sodium bicarbonate and react for 30 min. Then add the remaining 2 / 3 of the mixture and 0.6 parts of emulsifier at a rate of 3 drops / s. Stir at 300 rpm for 3 h and cool naturally to room temperature. Adjust the pH value to 6.5 with a sodium carbonate aqueous solution with a sodium carbonate content of 5 wt% to obtain a modified polyacrylic acid emulsion.

[0035] (3) Mix 3 parts vinyltriethoxysilane and 23 parts ethanol evenly, adjust the pH of the solution to 3.5 with 1 mol / L hydrochloric acid aqueous solution, add 14 parts deionized water, stir at 40℃ and 100 rpm for 1.5 h, cool naturally to room temperature, and adjust the pH to 7.5 with 10 wt% ammonia water to obtain hydrolyzed vinyltriethoxysilane.

[0036] (4) Stir 11 parts of montmorillonite and 20 parts of modified polyacrylic acid emulsion at 75°C and 800 rpm for 15 h, add 13 parts of hydrolyzed vinyltriethoxysilane and 2 parts of ammonium persulfate, continue stirring for 13 h, adjust the pH of the solution to 7 with 10 wt% ammonia water, and obtain composite modified polyacrylic acid emulsion.

[0037] (5) 11 parts of composite modified polyacrylic acid emulsion, 50 parts of vinyl acetate, 1.0 part of ammonium persulfate, 0.2 parts of methylisothiazolinone, 4 parts of dioctyl adipate, and 53 parts of deionized water were stirred at 85°C and 300 rpm for 5 hours and then naturally cooled to room temperature to obtain a waterproof and oil-proof high-viscosity adhesive.

[0038] Example 3

[0039] (1) Mix 76 parts of deionized water, 2.1 parts of sodium dodecyl sulfate, 1.4 parts of octylphenyl polyoxyethylene ether, and 0.3 parts of ammonium persulfate at 300 rpm for 20 min to prepare an emulsifier;

[0040] (2) Mix 6 parts of N-hexyl-N-methacryloxy-N,N-dimethylaminoammonium bromide, 9 parts of (1-allyl-1H-benzimidazol-2-yl)methanol and 50 parts of acrylic acid to obtain a mixture. Take out 1 / 3 of the mixture and add it dropwise to 0.4 parts of emulsifier at a rate of 1 drop / s under stirring at 80℃ and 200 rpm. Add 0.09 parts of sodium bicarbonate and react for 40 min. Then add the remaining 2 / 3 of the mixture and 0.6 parts of emulsifier at a rate of 3 drops / s. Stir at 300 rpm for 4 h and cool naturally to room temperature. Adjust the pH value to 7 with a sodium carbonate aqueous solution with a sodium carbonate content of 5 wt% to obtain a modified polyacrylic acid emulsion.

[0041] (3) Mix 5 parts vinyltriethoxysilane and 40 parts ethanol evenly, adjust the pH of the solution to 4 with 1 mol / L hydrochloric acid aqueous solution, add 25 parts deionized water, stir at 50℃ and 100 rpm for 2.5 h, cool naturally to room temperature, adjust the pH to 8 with 10 wt% ammonia water to obtain hydrolyzed vinyltriethoxysilane.

[0042] (4) 15 parts of montmorillonite and 24 parts of modified polyacrylic acid emulsion were stirred at 90°C and 800 rpm for 18 h. 18 parts of hydrolyzed vinyltriethoxysilane and 3 parts of ammonium persulfate were added and stirred for another 16 h. The pH of the solution was adjusted to 8 with 10 wt% ammonia water to obtain the composite modified polyacrylic acid emulsion.

[0043] (5) 14 parts of composite modified polyacrylic acid emulsion, 55 parts of vinyl acetate, 1.5 parts of ammonium persulfate, 0.3 parts of potassium sorbate, 6 parts of ethylene glycol, and 62 parts of deionized water were stirred at 90°C and 300 rpm for 7 hours and then naturally cooled to room temperature to obtain a waterproof and oil-proof high-viscosity adhesive.

[0044] Comparative Example 1

[0045] The difference between Comparative Example 1 and Example 2 lies in step (4). Step (4) is changed to: stirring 20 parts of modified polyacrylic acid emulsion, 13 parts of hydrolyzed vinyltriethoxysilane, and 2 parts of ammonium persulfate at 75°C and 800 rpm for 13 hours, and adjusting the pH of the solution to 7 with 10 wt% ammonia water to obtain a composite modified polyacrylic acid emulsion. The remaining steps are the same as in Example 2.

[0046] Comparative Example 2

[0047] The difference between Comparative Example 2 and Example 2 lies in step (4). Step (4) is changed to: stirring 11 parts of montmorillonite and 20 parts of modified polyacrylic acid emulsion at 75°C and 800 rpm for 15 hours, and adjusting the pH of the solution to 7 with 10 wt% ammonia water to obtain a composite modified polyacrylic acid emulsion. The remaining steps are the same as in Example 2.

[0048] Comparative Example 3

[0049] The difference between Comparative Example 3 and Example 2 lies in step (2). Step (2) is changed to: mixing 7 parts of (1-allyl-1H-benzimidazole-2-yl)methanol and 37 parts of acrylic acid to obtain a mixture; taking out 1 / 3 of the mixture and adding it dropwise to 0.4 parts of emulsifier at a rate of 1 drop / s under stirring at 75°C and 200 rpm; adding 0.07 parts of sodium bicarbonate; reacting for 30 min; then adding the remaining 2 / 3 of the mixture and 0.6 parts of emulsifier at a rate of 3 drops / s; stirring at 300 rpm for 3 h; naturally cooling to room temperature; and adjusting the pH value to 6.5 with a sodium carbonate aqueous solution with a sodium carbonate content of 5 wt% to obtain a modified polyacrylic acid emulsion. The remaining steps are the same as in Example 2.

[0050] Comparative Example 4

[0051] The difference between Comparative Example 4 and Example 2 lies in step (2). Step (2) is changed to: mixing 4 parts of N-hexyl-N-methacryloyloxy-N,N-dimethylaminoammonium bromide and 37 parts of acrylic acid to obtain a mixture; taking out 1 / 3 of the mixture and adding it dropwise to 0.4 parts of emulsifier at a rate of 1 drop / s under stirring at 75°C and 200 rpm; adding 0.07 parts of sodium bicarbonate; reacting for 30 min; then adding the remaining 2 / 3 of the mixture and 0.6 parts of emulsifier at a rate of 3 drops / s; stirring at 300 rpm for 3 h; naturally cooling to room temperature; and adjusting the pH value to 6.5 with a sodium carbonate aqueous solution with a sodium carbonate content of 5 wt% to obtain the modified polyacrylic acid emulsion. The remaining steps are the same as in Example 2.

[0052] Example of effect

[0053] Table 1 below shows the performance analysis results of the waterproof and oil-resistant high-viscosity adhesives of Examples 1 to 3 and Comparative Examples 1 to 4 of the present invention.

[0054] Table 1

[0055]

[0056]

[0057] A comparison of the experimental data from Examples 1, 2, and 3 with those from Comparative Examples 1 and 2 reveals that by performing cation exchange between the modified polyacrylic acid emulsion and montmorillonite layers, organic groups are allowed to cover the surface of montmorillonite or insert into its interlayer spaces, increasing the interlayer spacing and improving the dispersibility and stability of montmorillonite. This allows it to form physical crosslinking points in the adhesive, participating together with vinyltriethoxysilane in the construction of the three-dimensional network structure between the modified polyacrylic acid and polyvinyl acetate polymer molecules. This enhances the cohesive force and tensile strength of the adhesive, and it can also absorb moisture from the adhesive, forming a gel structure and increasing the adhesive's viscosity. Furthermore, the introduction of Si-O-Si bonds into the adhesive further improves its waterproof and waterproof properties. Oil resistance and strength; A comparison of experimental data from Examples 1, 2, and 3 with Comparative Example 3 reveals that the introduction of longer chain segments through N-hexyl-N-methacryloyloxy-N,N-dimethylaminoammonium bromide creates a steric hindrance effect due to its larger spatial volume, making it difficult for water molecules to break through the carbon chain barrier of long-chain alkanes, thus repelling them from the material surface and enhancing the waterproof and oil-resistant properties of the adhesive; A comparison of experimental data from Examples 1, 2, and 3 with Comparative Example 4 reveals that the benzimidazole group in (1-allyl-1H-benzimidazole-2-yl)methanol can form a protective film on the bonding surface, preventing contact with oxygen, moisture, and other media, thereby achieving waterproof and oil-resistant effects.

[0058] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No markings in the claims should be construed as limiting the scope of the claims.

Claims

1. A method for preparing a waterproof, oil-resistant, high-viscosity adhesive, characterized in that, The preparation steps include the following: (1) Mix 2-6 parts of N-hexyl-N-methacryloxy-N,N-dimethylaminoammonium bromide, 5-9 parts of (1-allyl-1H-benzimidazole-2-yl)methanol and 24-50 parts of acrylic acid to obtain a mixture. Take out 1 / 3 of the mixture and add it dropwise to 0.4 parts of emulsifier at a rate of 1 drop / s under stirring at 70-80℃ and 200rpm. Add 0.05-0.09 parts of sodium bicarbonate and react for 20-40min. Then add the remaining 2 / 3 of the mixture and 0.6 parts of emulsifier at a rate of 3 drops / s. Stir at 300rpm for 2-4h and cool naturally to room temperature. Adjust the pH value to 6-7 with sodium carbonate aqueous solution to obtain modified polyacrylic acid emulsion. (2) Stir 7-15 parts of montmorillonite and 16-24 parts of modified polyacrylic acid emulsion at 60-90℃ and 800rpm for 12-18h, add 8-18 parts of hydrolyzed vinyltriethoxysilane and 1-3 parts of ammonium persulfate, continue stirring for 10-16h, adjust the pH of the solution to 6-8 with 10wt% ammonia water to obtain a composite modified polyacrylic acid emulsion; the preparation steps of the hydrolyzed vinyltriethoxysilane are as follows: mix 1-5 parts of vinyltriethoxysilane and 6-40 parts of ethanol evenly, adjust the pH of the solution to 3-4 with hydrochloric acid aqueous solution, add 3-25 parts of deionized water, stir at 30-50℃ and 100rpm for 0.5-2.5h, cool naturally to room temperature, adjust the pH to 7-8 with 10wt% ammonia water to obtain hydrolyzed vinyltriethoxysilane; (3) Stir 8-14 parts of composite modified polyacrylic acid emulsion, 45-55 parts of vinyl acetate, 0.5-1.5 parts of ammonium persulfate, 0.1-0.3 parts of preservative, 2-6 parts of film-forming aid, and 44-62 parts of deionized water at 80-90℃ and 300rpm for 3-7h, and then cool naturally to room temperature to obtain a waterproof and oil-proof high-viscosity adhesive.

2. The method for preparing a waterproof and oil-resistant high-viscosity adhesive according to claim 1, characterized in that, The preparation steps of the emulsifier in step (1) are as follows: 54-76 parts of deionized water, 1.5-2.1 parts of sodium dodecyl sulfate, 0.8-1.4 parts of octylphenyl polyoxyethylene ether, and 0.1-0.3 parts of ammonium persulfate are mixed at 300 rpm for 10-20 min to obtain the emulsifier.

3. The method for preparing a waterproof and oil-resistant high-viscosity adhesive according to claim 1, characterized in that, The sodium carbonate content in the sodium carbonate aqueous solution in step (1) is 5 wt%.

4. The method for preparing a waterproof and oil-resistant high-viscosity adhesive according to claim 1, characterized in that, The concentration of hydrochloric acid in the hydrochloric acid aqueous solution is 1 mol / L.

5. The method for preparing a waterproof and oil-resistant high-viscosity adhesive according to claim 1, characterized in that, The preservative mentioned in step (3) is any one or a mixture of sodium benzoate, methylisothiazolinone, and potassium sorbate.

6. The method for preparing a waterproof and oil-resistant high-viscosity adhesive according to claim 1, characterized in that, The film-forming aid in step (3) is any one or a mixture of dibutyl phthalate, dioctyl adipate, and ethylene glycol.

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