Antistatic acrylic pressure-sensitive adhesive and preparation method thereof

Abstract

The invention relates to the technical field of adhesives, and discloses an antistatic acrylate pressure-sensitive adhesive and a preparation method thereof. The acrylate pressure-sensitive adhesive is formed by mixing an acrylate polymer as a base material and a curing agent as an auxiliary material. The acrylate polymer is prepared by seed emulsion polymerization, and a carbon nanotube core and a modified polymerization monomer are added at the same time. On the one hand, the carbon nanotubes connected by chemical bonds can be evenly dispersed in the pressure-sensitive adhesive to form a continuous conductive path, thereby improving the antistatic effect of the pressure-sensitive adhesive. The modified polymerization monomer structure contains a large number of polymerizable unsaturated olefin functional groups, as well as a large number of strongly polar sulfonic acid groups and rigid heterocyclic structures, which can improve the bonding performance and high temperature resistance of the acrylate pressure-sensitive adhesive, and can also utilize the hydrophilicity of the sulfonic acid group to produce an auxiliary effect on eliminating static electricity.

Description

Technical Field

[0001] The invention relates to the technical field of adhesives, and in particular to an antistatic acrylic pressure-sensitive adhesive and a preparation method thereof. Background Art

[0002] Pressure-sensitive adhesive is an important application material, which is very common in daily work and life. Among all types of pressure-sensitive adhesives, acrylic pressure-sensitive adhesive has significant advantages. First of all, it has high saturation, excellent antioxidant properties, is transparent and colorless, and is not easy to turn yellow under sunlight. These characteristics enable acrylic pressure-sensitive adhesive to maintain stable performance during long-term use. Secondly, acrylic pressure-sensitive adhesive has good softness and viscosity, and is suitable for a variety of printing materials. Especially in recent years, with the rapid development of electronic products such as mobile phones and computers, the demand for protective film products has increased, which has further expanded the application of acrylic pressure-sensitive adhesives. However, due to the increasing integration of electronic products, the requirements for the antistatic properties of film materials have gradually increased, and electronic products will inevitably generate heat during use. This requires the adhesive used to have good temperature resistance to avoid thermal aging and shedding.

[0003] However, the antistatic and heat resistance properties of acrylic pressure-sensitive adhesives are poor. In the current fierce market competition environment, these shortcomings have a great negative impact on the application of acrylic pressure-sensitive adhesives in the electronic products industry. Therefore, it is of great significance to design an acrylic pressure-sensitive adhesive with good antistatic properties, bonding properties and high temperature resistance.

[0004] Since the production method of acrylate pressure-sensitive adhesive is flexible, its performance can be adjusted to meet specific needs by adding different monomers. Based on this, the present invention provides an acrylate pressure-sensitive adhesive, and the prepared acrylate pressure-sensitive adhesive has excellent comprehensive performance by designing the monomers. Summary of the invention

[0005] In order to solve the problems mentioned in the background technology, the purpose of the present invention is to provide an antistatic acrylic pressure-sensitive adhesive and a preparation method thereof.

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

[0007] A method for preparing an antistatic acrylic pressure-sensitive adhesive, wherein the acrylic pressure-sensitive adhesive is prepared from the following raw materials in parts by weight:

[0008]

[0009] The preparation method comprises the following steps:

[0010] The first step is to prepare all the raw materials according to their weight fractions;

[0011] The second step is to first put the acrylic polymer and solvent into the stirring kettle, control the temperature to 70-80°C, and mechanically stir at a speed of 500-1000r / min for 30-60min. Then stop heating, wait until the temperature drops to room temperature, then add the curing agent and catalyst into the stirring kettle, stir for 10-20min, and finally add the defoaming agent into the stirring kettle, stir for 10-20min, and let it stand for 1-1.5h.

[0012] As a further embodiment of the present invention, the method for preparing the acrylic ester polymer comprises the following steps:

[0013] Step S1, ultrasonically mixing the carbon nanotube core and purified water to form a uniform dispersion, then adding sodium dodecylbenzene sulfonate to the dispersion, and mechanically stirring for 30-60 minutes to form a seed solution;

[0014] Step S2, ethyl methacrylate, isooctyl acrylate, hydroxyethyl methacrylate, modified polymerization monomer and 60-70% by volume ethanol solution are mixed, stirred evenly, and then sodium dodecylbenzene sulfonate is added to the formed mixed solution, and mechanically stirred for 20-40 minutes to form a polymerization solution;

[0015] Step S3, adding the initiator solution to the seed solution, and raising the temperature to 75-78°C, stirring to form a reaction solution, and then dividing the polymerization solution into three equal parts, adding them to the reaction solution three times, each time with an interval of 20-40 minutes. After the addition is completed, the temperature is raised to 80-82°C, and the stirring is continued at a temperature of 8-16 hours, and then the temperature is reduced and the material is discharged to obtain an acrylate polymer.

[0016] As a further solution of the present invention, in step S1, the method for preparing the carbon nanotube core is as follows:

[0017] Add allylmalonic acid to tetrahydrofuran, stir mechanically to make it uniform, add the composite catalyst to the resulting mixed solution, stir at 40-50°C for 1-2h, then put it in an ice bath, continue to add multi-walled carbon nanotubes, and after adding, ultrasonically disperse for 20-40min, remove from the ice bath, stir at room temperature for 3-6h, discharge, separate the solid product, and the carbon nanotube core can be obtained.

[0018] As a further solution of the present invention, the composite catalyst is a mixture of 4-dimethylaminopyridine and dicyclohexylcarbodiimide in a mass ratio of 1:3-5.

[0019] In the above technical scheme, a composite catalyst is first used to activate the carboxyl group in the allylmalonic acid structure so that it can undergo esterification condensation with the active hydroxyl group in the multi-walled carbon nanotube structure to obtain a carbon nanotube whose surface is modified with a large number of unsaturated alkenyl substituents that can participate in the polymerization reaction, namely, a carbon nanotube core.

[0020] As a further embodiment of the present invention, in step S2, the method for preparing the modified polymer monomer comprises the following steps:

[0021] Step SS1, using a sulfonic acid aniline compound and a heterocyclic diglycidyl ester compound as polymerization monomers, and performing ring-opening polymerization at a temperature of 70-80° C. to obtain an intermediate product;

[0022] Step SS2: Use a functional reagent to perform functional modification on the intermediate product to obtain a modified polymer monomer.

[0023] As a further embodiment of the present invention, in step SS1, the sulfonic acid aniline compound is 4,4'-diaminostilbene-2,2'-disulfonic acid; and the heterocyclic diglycidyl ester compound is 1,2-cyclohexanediol diglycidyl ether.

[0024] As a further embodiment of the present invention, in step SS2, the functional reagent is acryloyl chloride or methacryloyl chloride.

[0025] In the above technical scheme, a sulfonic acid aniline compound and a heterocyclic diglycidyl ester compound are firstly used for ring-opening polymerization to form a polymer intermediate product. Since a large number of active substituted hydroxyl groups are generated during the ring-opening reaction, these active substituted hydroxyl groups can be further condensed with a functionalizing agent to obtain a heterocyclic polymer macromolecular substance containing multiple unsaturated olefinic substituents in the structure, i.e., a modified polymer monomer.

[0026] As a further solution of the present invention, in step S3, the preparation method of the initiator solution is: dissolving azobisisobutyronitrile in an ethanol solution with a volume fraction of 60-70% to prepare a uniform mixed solution with a mass fraction of 1-3%.

[0027] In the above technical scheme, a seed emulsion polymerization method is adopted, with the carbon nanotube core as the core, and under the action of an initiator, ethyl methacrylate, isooctyl acrylate, hydroxyethyl methacrylate and modified polymerization monomers are in situ polymerized on the surface of the carbon nanotube core to obtain an acrylate polymer.

[0028] As a further embodiment of the present invention, the defoamer is NYK-065; the curing agent is a polyisocyanate curing agent; the catalyst is stannous octoate or dibutyltin dilaurate; and the solvent is ethyl acetate.

[0029] An antistatic acrylic pressure-sensitive adhesive is prepared by adopting the above preparation method.

[0030] Beneficial effects of the present invention:

[0031] (1) The present invention uses seed emulsion polymerization to prepare an acrylate polymer with carbon nanotubes as the core and acrylic resin molecular chains as the shell structure, and uses the acrylate polymer as the main raw material of the pressure-sensitive adhesive. On the one hand, the carbon nanotubes connected by chemical bonds can be evenly dispersed in the pressure-sensitive adhesive to form a continuous conductive path, so that the pressure-sensitive adhesive can exhibit a good antistatic effect.

[0032] (2) The present invention prepares a modified polymerizable monomer and performs an emulsion polymerization reaction. Since the modified polymerizable monomer contains a large number of polymerizable unsaturated olefin functional groups and a large number of strongly polar sulfonic acid groups, the cross-linking density of the prepared acrylic polymer molecular chain can be greatly increased, thereby improving its cohesive force and enabling the pressure-sensitive adhesive to exhibit higher bonding performance. The hydrophilicity of the sulfonic acid group can also be used to absorb moisture in the air, thereby producing an auxiliary effect on eliminating static electricity. Moreover, the presence of the sulfonic acid group can also generate hydrogen bonds with the adhered substrate, thereby further improving the bonding performance of the pressure-sensitive adhesive. In addition, the benzene ring and cyclohexane rigid heterocycle contained in the modified polymerizable monomer structure can also effectively improve the high temperature resistance of the pressure-sensitive adhesive.

[0033] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0035] Figure 1 This is the infrared analysis test diagram of the modified polymerization monomer. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Preparation Example 1

[0038] Preparation of Acrylate Polymers:

[0039] Step S1, ultrasonically mixing 0.3 g of carbon nanotube core and 50 mL of purified water to form a uniform dispersion, then adding 0.1 g of sodium dodecylbenzene sulfonate to the dispersion, and mechanically stirring for 40 min to form a seed solution;

[0040] Step S2, 40 g of ethyl methacrylate, 5 g of isooctyl acrylate, 1.2 g of hydroxyethyl methacrylate, 0.3 g of modified polymerization monomer and 500 mL of 70% by volume ethanol solution were mixed, and after stirring evenly, 1.5 g of sodium dodecylbenzene sulfonate was added to the formed mixed solution, and after mechanical stirring for 30 minutes, a polymerization solution was formed;

[0041] Step S3, dissolving 0.2 g of azobisisobutyronitrile in an ethanol solution with a volume fraction of 70% to prepare a uniform mixed solution with a mass fraction of 2%, to obtain an initiator solution;

[0042] Step S4, add the initiator solution to the seed solution, and raise the temperature to 78°C, stir to form a reaction solution, and then divide the polymerization solution into three equal parts, add it to the reaction solution three times, each time with an interval of 30 minutes. After the addition is completed, raise the temperature to 82°C, continue to keep warm and stir for 12 hours, cool and discharge the material, and the acrylate polymer can be obtained.

[0043] The preparation method of the carbon nanotube core is as follows:

[0044] 0.4 g of allylmalonic acid was added to tetrahydrofuran, and after mechanical stirring, 0.1 g of 4-dimethylaminopyridine and 0.3 g of dicyclohexylcarbodiimide were added to the resulting mixture. After the addition, the mixture was stirred at 50°C for 1 h, and then placed in an ice bath, and 0.6 g of multi-walled carbon nanotubes were added. After the addition, the mixture was ultrasonically dispersed for 30 min, removed from the ice bath, stirred at room temperature for 4 h, discharged, and the solid product was separated to obtain the carbon nanotube core.

[0045] The soap back titration method was used to test the ester content of the carbon nanotube core. 0.5 g of the sample was selected as the test sample. The results showed that the ester content was 2.584 mmol / g.

[0046] The preparation method of the modified polymer monomer comprises the following steps:

[0047] Step SS1, add 0.4 g of 4,4'-diaminostilbene-2,2'-disulfonic acid and 0.25 g of 1,2-cyclohexanediol diglycidyl ether to toluene, start stirring, mix evenly, introduce nitrogen protection, then start heating, wait for the temperature to rise to 75°C, keep stirring at this temperature for 12 hours, and obtain an intermediate product;

[0048] Step SS2, 1.5 g of the intermediate product and tetrahydrofuran are stirred and mixed, and then 0.2 g of acryloyl chloride is added to the resulting mixed solution. After the addition, the mixture is stirred at room temperature for 4 hours and the material is discharged to obtain a modified polymerization monomer.

[0049] The modified polymer monomer was made into potassium bromide tablets and subjected to infrared analysis test. The results were as follows: Figure 1 As shown, 3389cm -1 The absorption peak at 3250 cm is the characteristic absorption peak of secondary amine NH. -1 The absorption peak at 3079 cm is the characteristic absorption peak of hydroxyl group produced by the ring-opening reaction. -1 The absorption peak at 3029cm is the characteristic absorption peak of carbon and hydrogen in benzene ring. -1 The absorption peak at 1759cm is the characteristic absorption peak of unsaturated carbon-carbon double bond. -1 The absorption peak that appears at is the characteristic absorption peak of the ester group's carbon-oxygen double bond produced by esterification condensation.

[0050] Example 1

[0051] An antistatic acrylic pressure-sensitive adhesive is prepared from the following raw materials in parts by weight:

[0052]

[0053] The preparation method of the acrylic pressure-sensitive adhesive comprises the following steps:

[0054] The first step is to prepare all the raw materials according to their weight fractions;

[0055] In the second step, first put the acrylic acid ester polymer and ethyl acetate into the stirring kettle, control the temperature to 70°C, and mechanically stir at a speed of 500r / min for 60 minutes. Then stop heating, wait until the temperature drops to room temperature, then add the curing agent and dibutyltin dilaurate into the stirring kettle, stir for 10 minutes, and finally add NYK-065 into the stirring kettle, stir for 10 minutes, and let it stand for 1 hour.

[0056] The preparation method of the acrylic ester polymer is shown in Preparation Example 1; the curing agent is isophorone diisocyanate trimer, and the following are the same.

[0057] Example 2

[0058] An antistatic acrylic pressure-sensitive adhesive is prepared from the following raw materials in parts by weight:

[0059]

[0060] The preparation method of the acrylic pressure-sensitive adhesive comprises the following steps:

[0061] The first step is to prepare all the raw materials according to their weight fractions;

[0062] In the second step, first put the acrylic acid ester polymer and ethyl acetate into the stirring kettle, control the temperature to 75°C, and mechanically stir at a speed of 800r / min for 40 minutes. Then stop heating, wait until the temperature drops to room temperature, then add the curing agent and dibutyltin dilaurate into the stirring kettle, stir for 15 minutes, and finally add NYK-065 into the stirring kettle, stir for 15 minutes, and let it stand for 1 hour.

[0063] Example 3

[0064] An antistatic acrylic pressure-sensitive adhesive is prepared from the following raw materials in parts by weight:

[0065]

[0066] The preparation method of the acrylic pressure-sensitive adhesive comprises the following steps:

[0067] The first step is to prepare all the raw materials according to their weight fractions;

[0068] In the second step, first put the acrylic acid ester polymer and ethyl acetate into the stirring kettle, control the temperature to 80°C, and mechanically stir at a speed of 1000r / min for 30 minutes. Then stop heating, wait until the temperature drops to room temperature, then add the curing agent and dibutyltin dilaurate into the stirring kettle, stir for 20 minutes, and finally add NYK-065 into the stirring kettle, stir for 20 minutes, and let it stand for 1.5 hours.

[0069] Comparative Example 1

[0070] An antistatic acrylic pressure-sensitive adhesive is prepared from the following raw materials in parts by weight:

[0071]

[0072] The preparation method of the acrylic pressure-sensitive adhesive comprises the following steps:

[0073] The first step is to prepare all the raw materials according to their weight fractions;

[0074] In the second step, first put the acrylic acid ester polymer and ethyl acetate into the stirring kettle, control the temperature to 75°C, and mechanically stir at a speed of 800r / min for 40 minutes. Then stop heating, wait until the temperature drops to room temperature, then add the curing agent and dibutyltin dilaurate into the stirring kettle, stir for 15 minutes, and finally add NYK-065 into the stirring kettle, stir for 15 minutes, and let it stand for 1 hour.

[0075] The preparation method of the acrylic ester polymer is different from that of Preparation Example 1 in that no modified polymerization monomer is added, and the rest is the same.

[0076] Comparative Example 2

[0077] An antistatic acrylic pressure-sensitive adhesive is prepared from the following raw materials in parts by weight:

[0078]

[0079] The preparation method of the acrylic pressure-sensitive adhesive comprises the following steps:

[0080] The first step is to prepare all the raw materials according to their weight fractions;

[0081] In the second step, first put the acrylic acid ester polymer and ethyl acetate into the stirring kettle, control the temperature to 75°C, and mechanically stir at a speed of 800r / min for 40 minutes. Then stop heating, wait until the temperature drops to room temperature, then add the curing agent and dibutyltin dilaurate into the stirring kettle, stir for 15 minutes, and finally add NYK-065 into the stirring kettle, stir for 15 minutes, and let it stand for 1 hour.

[0082] The preparation method of the acrylic ester polymer is as follows:

[0083] Step S1, 40g of ethyl methacrylate, 5g of isooctyl acrylate, 1.2g of hydroxyethyl methacrylate, 0.3g of modified polymerization monomer and 500mL of 70% by volume ethanol solution were mixed, stirred evenly, and then 1.5g of sodium dodecylbenzene sulfonate was added to the formed mixed solution, and mechanically stirred for 30 minutes to form a polymerization solution;

[0084] Step S2, dissolving 0.2 g of azobisisobutyronitrile in an ethanol solution with a volume fraction of 70% to prepare a uniform mixed solution with a mass fraction of 2%, to obtain an initiator solution;

[0085] Step S3, add the initiator solution to the polymerization liquid, and raise the temperature to 78°C, stir to form a reaction liquid, raise the temperature to 82°C, keep stirring for 12 hours, add 0.3g carbon nanotubes, mechanically stir for 1 hour, discharge, and obtain an acrylate polymer.

[0086] Test Case

[0087] The acrylate pressure-sensitive adhesives in the embodiments and comparative examples were subjected to various performance tests. Each acrylate pressure-sensitive adhesive was coated on the surface of a PET film, placed in a temperature condition of 80° C. for curing for 10 min, then taken out, and then covered on the coated surface with a release film, and then aged in a temperature environment of 50° C. for 24 h, taken out, and tested. The results are recorded in Table 1:

[0088] Table 1 - Test results

[0089]

[0090]

[0091] Note: The 180° peel strength test method refers to the standard GB / T 2792-1998. After the test is completed, the test samples of the same batch are placed in a temperature environment of 150°C for 48 hours and then taken out for 180° peel strength test; the surface resistivity is tested using a resistivity tester, and the test voltage is selected as 100V.

[0092] The test results show that the use of the acrylate polymer prepared in Preparation Example 1 of the present invention as a pressure-sensitive adhesive base material can make the acrylate pressure-sensitive adhesive have good bonding properties and temperature resistance, and a low surface resistivity, and can have a good antistatic effect.

[0093] When using acrylate polymers prepared without adding modified polymerization monomers as the base material, the acrylic resin molecular chain does not contain strongly polar sulfonic acid groups and rigid heterocycles, resulting in a significant decrease in the bonding performance and temperature resistance of the pressure-sensitive adhesive, and the antistatic performance is also affected to a certain extent.

[0094] Adding the acrylic polymer obtained by physical blending with carbon nanotubes as the base material may cause agglomeration, resulting in the failure to form a stable conductive network in the pressure-sensitive adhesive, resulting in an increase in the resistivity of the pressure-sensitive adhesive and a decrease in the antistatic performance.

[0095] Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas, including the best mode, and also enable any technician in the field to practice the present invention, including making and using any device or system, and implementing any combined method. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The scope of patent protection of the present invention is defined by the claims and may include other embodiments that can be thought of by those skilled in the art. If these other embodiments have structural elements similar to the literal expression of the claims, or if they include equivalent structural elements that are not substantially different from the literal expression of the claims, then these other embodiments should also be included in the scope of the claims.

[0096] 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 the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing an antistatic acrylic pressure-sensitive adhesive, characterized in that: The acrylic pressure-sensitive adhesive is made of the following raw materials in parts by weight: Acrylate polymer 45-55 parts; Defoaming agent 0.5-1.5 parts; 1-2 parts of curing agent; Catalyst 0.1-0.5 parts; 20-30 parts of solvent; The preparation method comprises the following steps: The first step is to prepare all the raw materials according to their weight fractions; Step 2: First, put the acrylic polymer and solvent into a stirring kettle, control the temperature to 70-80°C, and mechanically stir at a speed of 500-1000r / min for 30-60min. Then stop heating, wait until the temperature drops to room temperature, then add the curing agent and catalyst into the stirring kettle, stir for 10-20min, and finally add the defoaming agent into the stirring kettle, stir for 10-20min, and let it stand for 1-1.5h. The preparation method of the acrylic ester polymer comprises the following steps: Step S1, ultrasonically mixing the carbon nanotube core and purified water to form a uniform dispersion, then adding sodium dodecylbenzene sulfonate to the dispersion, and mechanically stirring for 30-60 minutes to form a seed solution; Step S2, ethyl methacrylate, isooctyl acrylate, hydroxyethyl methacrylate, modified polymerization monomer and 60-70% by volume ethanol solution are mixed, stirred evenly, and then sodium dodecylbenzene sulfonate is added to the formed mixed solution, and mechanically stirred for 20-40 minutes to form a polymerization solution; Step S3, adding the initiator solution to the seed solution, and raising the temperature to 75-78°C, stirring to form a reaction solution, and then dividing the polymer solution into three equal parts, adding the three parts to the reaction solution three times, each time with an interval of 20-40 minutes, after the addition is completed, raising the temperature to 80-82°C, continuing to keep the temperature and stir for 8-16 hours, cooling and discharging, and the acrylate polymer can be obtained; The preparation method of the carbon nanotube core is as follows: Add allylmalonic acid to tetrahydrofuran, stir mechanically to make it uniform, add the composite catalyst to the resulting mixed solution, stir at 40-50°C for 1-2h, then put it in an ice bath, continue to add multi-walled carbon nanotubes, and after adding, ultrasonically disperse for 20-40min, remove from the ice bath, stir at room temperature for 3-6h, discharge, separate the solid product, and obtain the carbon nanotube core; The preparation method of the modified polymer monomer comprises the following steps: Step SS1, using 4,4'-diaminobenzylbenzene-2,2'-disulfonic acid and 1,2-cyclohexanediol diglycidyl ether as polymerization monomers, performing ring-opening polymerization at a temperature of 70-80° C. to obtain an intermediate product; Step SS2: using a functional reagent to perform functional modification on the intermediate product to obtain a modified polymer monomer; The functional reagent is acryloyl chloride or methacryloyl chloride.

2. The method for preparing an antistatic acrylic pressure-sensitive adhesive according to claim 1, characterized in that: The composite catalyst is a mixture of 4-dimethylaminopyridine and dicyclohexylcarbodiimide, with a mass ratio of 1:3-5.

3. The method for preparing an antistatic acrylic pressure-sensitive adhesive according to claim 1, characterized in that: In step S3, the initiator solution is prepared by dissolving azobisisobutyronitrile in an ethanol solution with a volume fraction of 60-70% to prepare a uniform mixed solution with a mass fraction of 1-3%.

4. The method for preparing an antistatic acrylic pressure-sensitive adhesive according to claim 1, characterized in that: The defoamer is NYK-065; the curing agent is a polyisocyanate curing agent; the catalyst is stannous octoate or dibutyltin dilaurate; and the solvent is ethyl acetate.

5. An antistatic acrylic pressure-sensitive adhesive, characterized in that: The method is prepared according to any one of claims 1 to 4.

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