Acrylic antistatic pressure-sensitive adhesive and preparation process thereof

Abstract

The invention relates to the field of acrylic pressure-sensitive adhesives, in particular to an acrylic antistatic pressure-sensitive adhesive, which is prepared from the following raw materials in parts by weight: 45 to 60 parts of modified acrylate emulsion, 1 to 1.5 parts of antioxidant, 10 to 15 parts of solvent, 1.5 to 3 parts of curing agent and 1 to 1.2 parts of defoaming agent, wherein the modified acrylate emulsion is prepared by initiating acrylics, a high-temperature-resistant functional agent and a functional polymerization monomer under the action of an initiator, and the high-temperature-resistant functional agent provides heat resistance for colloid through a benzene ring and polysulfone and further has unsaturated double bonds, so that the adhesive structure of the colloid cannot be damaged; the functional polymeric monomer improves the polymerization effect of the acrylate emulsion through unsaturated double bonds and can also improve the adhesive performance of colloid, meanwhile, a large amount of quaternary ammonium salt can adsorb moisture near the colloid and endow the colloid with an antistatic effect, and the polymeric monomer contains a pyridine heterocyclic structure and can further improve the high temperature resistance of the colloid.

Description

Technical Field

[0001] This invention relates to the field of pressure-sensitive adhesive technology, specifically to an acrylic antistatic pressure-sensitive adhesive and its preparation process. Background Technology

[0002] With the further development of electronic technology and the improvement of people's daily living standards, the demand for pressure-sensitive adhesives is increasing day by day, and the electronic product market is also gradually increasing its requirements for the diversification of functions of pressure-sensitive adhesives.

[0003] The most common functional requirements for pressure-sensitive adhesives (PSAs) in the electronics and precision component markets can be broadly categorized into two aspects: antistatic properties and high-temperature resistance. For antistatic properties, the conventional approach is to add a single antistatic agent such as graphite or carbon black. However, using only graphite or carbon black not only affects aesthetics but also interferes with the testing of electronic components. Another approach is to apply a single antistatic coating, which effectively avoids aesthetic issues but significantly increases process costs, hindering large-scale application. Regarding improvements in high-temperature resistance, current technologies often employ rapid heat dissipation methods to enhance the high-temperature performance of PSAs in high-temperature environments. This method often requires heat dissipation devices such as aluminum foil, which not only provides limited improvement but is also expensive, making it unsuitable for mass production.

[0004] To address the aforementioned problems, this invention provides an acrylic antistatic voltage-sensitive adhesive that can solve the problems existing in the prior art. Summary of the Invention

[0005] To address the problems mentioned in the background art, the present invention aims to provide an acrylic antistatic voltage-sensitive adhesive and its preparation process.

[0006] The objective of this invention can be achieved through the following technical solutions: An acrylic antistatic voltage-sensitive adhesive, by weight, comprises the following raw materials: 45-60 parts modified acrylic emulsion, 1-1.5 parts antioxidant, 1-1.2 parts defoamer, 0.5-1.5 parts alkali agent, and 1.5-3 parts wetting agent; The modified acrylate emulsion comprises the following raw materials in parts by weight: 40-50 parts methyl methacrylate, 50-70 parts n-butyl acrylate, 30-40 parts isooctyl acrylate, 10-15 parts ethyl acrylate, 3-5 parts functional polymer monomers, 0.8-1.0 parts emulsifier, 20-30 parts deionized water, 0.9-1.5 parts initiator, and 3-5 parts high-temperature resistant functional agent; The preparation method of the modified acrylate emulsion includes the following steps: Step (1): Add the following components by weight of the formulation: methyl methacrylate, n-butyl acrylate, isooctyl acrylate, ethyl acrylate and functional polymer monomer to a stirrer and stir for 30-50 min. Heat to 55-65℃, add 0.2-0.3 parts of initiator and 10-12 parts of deionized water, keep warm and stir for 20-30 min to obtain a prepolymer emulsion. Step (2): Add the parts by weight of high-temperature resistant functional agent, emulsifier, remaining deionized water and remaining initiator to a stirrer, stir evenly and heat to 85-90℃, react for 2-4 hours, and discharge when naturally cooled to room temperature to obtain modified acrylic emulsion.

[0007] Furthermore, the antioxidant is triisooctyl phosphite or triisodecyl phosphite; the solvent is acetone; and the curing agent is triethylenediamine.

[0008] Furthermore, the defoamer is polydimethylsiloxane.

[0009] Further, in step (1), the emulsifier is sodium allyloxyhydroxypropyl sulfonate.

[0010] Further, in step (1), the method for preparing the functional polymer monomer includes the following steps: Step A1: Add 2-methyl-5-vinylpyridine and acryloyloxyethyltrimethylammonium chloride to the solvent acetonitrile, stir evenly, then add the catalyst, and react at 70-80℃ for 6-12h in an anaerobic environment. Then cool, filter, wash and dry to obtain the reaction intermediate. Step A2: Add 3-chloro-1-butene and the reaction intermediate to anhydrous toluene, then add triethylamine. React at 60-80℃ for 10-12 hours in an oxygen-free environment. After cooling, filter, wash, and dry to obtain the functional polymer monomer.

[0011] Reaction principle: The unsaturated double bond of 2-methyl-5-vinylpyridine is free radical copolymerized with the unsaturated double bond of acryloyloxyethyltrimethylammonium chloride using an initiator to obtain a reaction intermediate containing quaternary ammonium salt cationic groups. Then, the reaction intermediate is quaternized with 3-chloro-1-butene to obtain a functional polymer monomer containing bisquaternary ammonium salt cationic groups. This improves the limited antistatic function of small molecules. At the same time, the unsaturated alkenyl groups of the functional polymer monomer can participate in the matrix polymerization reaction, which is beneficial to the stable existence of the functional polymer monomer in the matrix and promotes the improvement of the matrix's adhesiveness.

[0012] Further, in step A1, the catalyst is dimethyl azobisisobutyrate or azobisisobutyronitrile.

[0013] Furthermore, in step (2), the preparation process of the high-temperature resistant functional agent includes the following steps: Step B1: Add polysulfone to chloroform and stir for 30-50 min. Under inert gas protection, add chlorinating agent and anhydrous tin tetrachloride, heat to 60-70℃, react for 12-24 h, cool, filter, wash and dry to obtain polysulfone intermediate. Step B2: Disperse the polysulfone intermediate in N,N-dimethylacetamide, then add p-hydroxystyrene and an acid-binding agent, then purge with nitrogen gas, heat to 60-80℃, and react for 12-16 hours. After the reaction, add ethanol, let stand to precipitate, filter, wash, and dry to obtain the high-temperature resistant functional agent.

[0014] Reaction principle: In the above reaction process, polysulfone is chloromethylated with a chlorinating agent under anaerobic conditions and anhydrous tin tetrachloride catalysis to obtain a polysulfone intermediate. The hydroxyl group of p-hydroxystyrene undergoes a nucleophilic substitution reaction with the chloromethyl group to obtain a high-temperature resistant functional agent with grafted benzene rings and unsaturated double bonds. This improves the disadvantage of single polysulfone affecting the viscosity of the colloid and at the same time enhances the high-temperature resistance of the colloid.

[0015] Further, in step B1, the chlorinating agent is any one of chloromethyl ethyl ether, chloromethyl methyl ether, and 1,4-dichloromethoxybutane.

[0016] Furthermore, in step B2, the acid-binding agent is potassium carbonate or sodium carbonate.

[0017] A preparation process for an acrylic antistatic voltage-sensitive adhesive includes the following steps: Step 1: Add the modified acrylate emulsion, antioxidant, and solvent to a stirrer according to the mass fraction, heat to 40-50℃, and stir for 1-1.5 hours to obtain the premixed solution; Step 2: Add the premixed liquid, curing agent, and defoamer to the mixer, heat to 60-70℃ and stir at 1000r / min for 1-3 hours. After standing and cooling, discharge the material to obtain an acrylic antistatic voltage-sensitive adhesive.

[0018] Beneficial effects of this invention: (1) Beneficial effects: This invention prepares functional polymers to participate in the preparation of modified acrylate emulsions. Because the polymers contain unsaturated double bonds and a large number of quaternary ammonium salt cationic groups, in actual use, small quaternary ammonium salt molecules are easily precipitated in the matrix, resulting in limited antistatic effect. Unsaturated double bonds can improve the polymerization effect of acrylate emulsions and improve the phenomenon of easy precipitation of small molecules. At the same time, they can also improve their adhesive properties. A large number of quaternary ammonium salts can adsorb the moisture near the colloid in actual use, achieving an antistatic effect. In addition, the polymers also contain pyridine heterocyclic structures, which can further improve the high temperature resistance of the colloid.

[0019] (2) Beneficial effects: This invention prepares a high-temperature resistant functional agent to participate in the preparation of acrylate emulsion. The high-temperature resistant properties of polysulfone itself can endow the colloid with high-temperature resistance. After modification, polysulfone can undergo free radical polymerization with the matrix through unsaturated double bonds. This solves the problem that simple mixing of polysulfone will affect the overall viscosity of the colloid. At the same time, it has rigid benzene rings, which is conducive to further improving the high-temperature resistance of the colloid.

[0020] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 Infrared spectral images of the reaction intermediates and functional polymer monomers in Example 1; Figure 2 The infrared test images are of the high-temperature resistant functional additive and polysulfone intermediate of the present invention in Example 1. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Preparation Example 1 The modified acrylate emulsion comprises the following raw materials in parts by weight: 40 parts methyl methacrylate, 50 parts n-butyl acrylate, 30 parts isooctyl acrylate, 10 parts ethyl acrylate, 3 parts functional polymer monomers, 1.0 part emulsifier, 20 parts deionized water, 1.5 parts initiator ammonium persulfate, and 3 parts high-temperature resistant functional agent.

[0025] The preparation method of the modified acrylate emulsion includes the following steps: Step (1): Add the following components by weight of methyl methacrylate, n-butyl acrylate, isooctyl acrylate, ethyl acrylate and functional polymer monomers to a stirrer and stir for 30 min. Heat to 55°C, add 0.3 parts of initiator ammonium persulfate and 10 parts of deionized water, keep warm and stir for 30 min to obtain a prepolymer emulsion. Step (2): Add the following parts by weight of high-temperature resistant functional agent, emulsifier sodium allyl oxyhydroxypropyl sulfonate, the remainder deionized water, and the remainder initiator ammonium persulfate to a stirrer, stir evenly, heat to 85°C, react for 3 hours, and discharge when naturally cooled to room temperature to obtain the modified acrylate emulsion.

[0026] The preparation method of the functional polymer monomer includes the following steps: Step A1: Add 0.8g of 2-methyl-5-vinylpyridine and 1.6g of acryloyloxyethyltrimethylammonium chloride to 30ml of anhydrous acetonitrile, stir well, then add 0.05g of azobisisobutyronitrile, react at 70℃ for 6h under anaerobic conditions, then cool, filter, wash and dry to obtain the reaction intermediate. Step A2: Add 1g of 3-chloro-1-butene and the reaction intermediate to anhydrous toluene, then add 0.03g of triethylamine. React at 80°C for 10 hours under an oxygen-free environment. After cooling, filter, wash, and dry to obtain the functional polymer monomer.

[0027] Infrared spectra of reaction intermediates and functional monomers are shown below. Figure 1 As shown, in the infrared spectrum of the reaction intermediate, 2984-2802 cm⁻¹ -1 The peak at 1731 cm⁻¹ is the characteristic absorption peak for CH of methyl and ethyl groups. -1 The peak at 1603 cm⁻¹ is the characteristic absorption peak of the C=O group of the ester group. -1 The characteristic absorption peak for C=N is at 1263 cm⁻¹. -1 CN is the quaternary ammonium salt of acryloyloxyethyltrimethylammonium chloride. + Characteristic absorption peak; 3024 cm⁻¹ in the infrared spectrum of functional polymer monomers. -1 The characteristic absorption peak of CH for unsaturated double bonds is located at 2989-2831 cm⁻¹. -1 The peak at 1744 cm⁻¹ is the characteristic absorption peak for CH of methyl and ethyl groups. -1 The peak at 1605 cm⁻¹ is the characteristic absorption peak of the C=O group of the ester group. -1 The characteristic absorption peak for C=N is at 1259 cm⁻¹. -1 CN in the quaternary ammonium salt on the pyridine ring + Characteristic absorption peak, 1046 cm⁻¹ -1 CN is the quaternary ammonium salt of acryloyloxyethyltrimethylammonium chloride. + Characteristic absorption peaks.

[0028] The preparation process of the high-temperature resistant functional agent includes the following steps: Step B1: Add 1.5g of polysulfone to 50ml of N,N-dimethylformamide, stir for 30min, add 3g of chlorinating agent chloromethyl ethyl ether and 0.02g of anhydrous tin tetrachloride under inert gas protection, heat to 60℃, react for 12h, cool, filter, wash and dry to obtain polysulfone intermediate. Step B2: Disperse 1g of polysulfone intermediate in 30ml of N,N-dimethylformamide, then add 0.5g of p-hydroxystyrene and 0.08g of potassium carbonate as an acid-binding agent, then purge with nitrogen gas, heat to 80℃, and react for 12h. After the reaction, add 100ml of ethanol, let stand to precipitate, filter, wash, and dry to obtain the high-temperature resistant functional agent.

[0029] A comparative diagram of infrared testing of polysulfone intermediates and high-temperature functional agents is shown below. Figure 2 As shown in the infrared spectrum of polysulfone intermediates, 3078 cm⁻¹ -1 The peak at 2964-2806 cm⁻¹ is the characteristic absorption peak of CH in the benzene ring. -1 The peak at 1332 cm⁻¹ is the characteristic absorption peak of CH for methyl and ethyl groups. -1 The characteristic absorption peak at 3074 cm⁻¹ is S=O; in the infrared test diagram of the high-temperature resistant functional agent, the peak is at 3074 cm⁻¹. -1 The peak at 3024 cm⁻¹ is the characteristic absorption peak of CH in the benzene ring. -1 The characteristic absorption peak of CH for unsaturated double bonds is located at 2974-2823 cm⁻¹. -1 The peak at 1331 cm⁻¹ is the characteristic absorption peak for methyl and ethyl groups (CH). -1 The characteristic absorption peak of S=O is located at 1236 cm⁻¹. -1 The peak at this location is a characteristic absorption peak of Ar-O-Ar.

[0030] Example 1 An acrylic antistatic voltage-sensitive adhesive, characterized in that, by weight, it comprises the following raw materials: 45 parts modified acrylic emulsion, 1 part antioxidant triisooctyl phosphite, 1 part defoamer polydimethylsiloxane, 10 parts solvent acetone, and 1.5 parts curing agent triethylenediamine.

[0031] The preparation method of antistatic voltage-sensitive adhesive includes the following steps: Step 1: Add the modified acrylate emulsion and the antioxidant triisodecyl phosphite to a stirrer according to the mass fraction, heat to 40°C, stir for 1 hour to obtain the premixed solution; Step 2: Add the premix and defoamer to the stirrer, heat to 65℃ and stir at 1000r / min for 1 hour. After standing and cooling, discharge the material to obtain acrylic antistatic voltage-sensitive adhesive.

[0032] The modified acrylate emulsion is the same as that in Preparation Example 1.

[0033] Example 2 An acrylic antistatic voltage-sensitive adhesive, characterized in that, by weight, it comprises the following raw materials: 50 parts modified acrylic emulsion, 1.2 parts antioxidant, 1.1 parts defoamer, 12 parts solvent, and 1.6 parts curing agent.

[0034] The preparation method of antistatic voltage-sensitive adhesive includes the following steps: Step 1: According to the mass fraction, add the modified acrylate emulsion and the antioxidant triisodecyl phosphite to the stirrer, heat to 45℃, and stir for 1.2h to obtain the premixed solution; Step 2: Add the premixed liquid and defoamer to the stirrer, heat to 65℃ and stir at 1200r / min for 2.5h. After standing and cooling, discharge the material to obtain acrylic antistatic voltage-sensitive adhesive.

[0035] The modified acrylate emulsion is the same as that in Preparation Example 1.

[0036] Example 3 An acrylic antistatic voltage-sensitive adhesive, characterized in that, by weight, it comprises the following raw materials: 50 parts modified acrylic emulsion, 1.2 parts antioxidant, 1.1 parts defoamer, 12 parts solvent, and 1.6 parts curing agent.

[0037] The preparation method of antistatic voltage-sensitive adhesive includes the following steps: Step 1: According to the mass fraction, add the modified acrylate emulsion and the antioxidant triisodecyl phosphite to a stirrer, heat to 45℃, and stir for 1.5h to obtain a premixed solution; Step 2: Add the premixed liquid and defoamer to the stirrer, heat to 65℃ and stir at 1500r / min for 2.5h. After standing and cooling, discharge the material to obtain acrylic antistatic voltage-sensitive adhesive.

[0038] The modified acrylate emulsion is the same as that in Preparation Example 1.

[0039] Comparative Example 1 An acrylic antistatic voltage-sensitive adhesive, characterized in that, by weight, it comprises the following raw materials: 50 parts modified acrylic emulsion, 1.2 parts antioxidant, 1.1 parts defoamer, 12 parts solvent, and 1.6 parts curing agent.

[0040] The preparation method of antistatic voltage-sensitive adhesive includes the following steps: Step 1: According to the mass fraction, add the modified acrylate emulsion and the antioxidant triisodecyl phosphite to the stirrer, heat to 45℃, and stir for 1.2h to obtain the premixed solution; Step 2: Add the premixed liquid and defoamer to the stirrer, heat to 65℃ and stir at 1000r / min for 2.5h. After standing and cooling, discharge the material to obtain acrylic antistatic voltage-sensitive adhesive.

[0041] The difference between the modified acrylate emulsion and the one in Preparation Example 1 is that the functionalized polymer monomer is replaced with a reaction intermediate.

[0042] Comparative Example 2 An acrylic antistatic voltage-sensitive adhesive, characterized in that, by weight, it comprises the following raw materials: 50 parts modified acrylic emulsion, 1.2 parts antioxidant, 1.1 parts defoamer, 12 parts solvent, and 1.6 parts curing agent.

[0043] The preparation method of antistatic voltage-sensitive adhesive includes the following steps: Step 1: According to the mass fraction, add the modified acrylate emulsion and the antioxidant triisodecyl phosphite to the stirrer, heat to 45℃, and stir for 1.2h to obtain the premixed solution; Step 2: Add the premixed liquid and defoamer to the stirrer, heat to 65℃ and stir at 1000r / min for 2.5h. After standing and cooling, discharge the material to obtain acrylic antistatic voltage-sensitive adhesive.

[0044] The difference between the modified acrylate emulsion and the one in Preparation Example 1 is that the high-temperature resistant functional additive is replaced with a polysulfone intermediate.

[0045] Performance testing: Pre-treatment: The pressure-sensitive adhesives prepared in Examples 1-3 and Comparative Examples 1-2 were coated onto PET films, cured at 80°C for 15 minutes, and then covered with a release film. The films were then cured at 50°C for 24 hours. The following tests were then performed: Initial tack: According to GB / T4852-2002 "Test Method for Initial Tack of Pressure-Sensitive Adhesive Tapes (Rolling Ball Method)," the rolling ball ramp stop test was used (measurement angle 20°). The initial tack of the pressure-sensitive adhesive was evaluated based on the largest steel ball size that could be adhered to the adhesive surface of a specified length. Larger steel ball diameters indicated greater initial tack performance. 180° peel strength test: According to GB / T2792-1995 "Test Method for 180° Peel Strength of Pressure-Sensitive Adhesive Tapes," the test was performed using an electronic universal testing machine (the adhered material was PET film, and the peel rate was 300 mm / min). Surface resistivity test: A resistivity meter was used, with a test voltage of 100V. Test results show that Examples 1-3 exhibit only a slight decrease in peel strength after 180° peeling following curing, and demonstrate excellent antistatic properties in surface resistivity tests. This is because they possess a large number of quaternary ammonium salt cationic groups that impart antistatic properties to the matrix, and also contain pyridine heterocycles and benzene rings. Their high-temperature resistant structure allows them to maintain excellent adhesiveness after curing.

[0046] In Comparative Example 1, the modified acrylate emulsion did not contain any functional polymer monomers, but only reaction intermediates. The colloid contained only a small amount of quaternary ammonium salt cationic groups and did not have unsaturated double bonds. In the matrix, this would affect the adhesiveness of the pressure-sensitive tape and would easily precipitate out, resulting in poor antistatic effect.

[0047] Comparative Example 2: The added polysulfone intermediate does not have unsaturated double bonds and is prone to agglomeration in the colloid, which affects the adhesion of the colloid. Since the alternating layer also contains a large number of quaternary ammonium salt cationic groups, it is also affected by the agglomeration effect, so it performs poorly in antistatic effect.

[0048] The above description is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. An acrylic antistatic voltage-sensitive adhesive, characterized in that, By weight, it includes the following raw materials: 45-60 parts modified acrylic emulsion, 1-1.5 parts antioxidant, 1-1.2 parts defoamer, 10-15 parts solvent, and 1.5-3 parts curing agent; The modified acrylate emulsion comprises the following raw materials in parts by weight: 40-50 parts methyl methacrylate, 50-70 parts n-butyl acrylate, 30-40 parts isooctyl acrylate, 10-15 parts ethyl acrylate, 3-5 parts functional polymer monomers, 0.8-1.0 parts emulsifier, 20-30 parts deionized water, 0.9-1.5 parts initiator, and 3-5 parts high-temperature resistant functional agent; The preparation method of the modified acrylate emulsion includes the following steps: Step (1): Add the following components by weight of the formulation: methyl methacrylate, n-butyl acrylate, isooctyl acrylate, ethyl acrylate and functional polymer monomer to a stirrer and stir for 30-50 min. Heat to 55-65℃, add 0.2-0.3 parts of initiator and 10-12 parts of deionized water, keep warm and stir for 20-30 min to obtain a prepolymer emulsion. Step (2): Add the parts by weight of high-temperature resistant functional agent, emulsifier, remaining deionized water and remaining initiator to a stirrer, stir evenly and heat to 85-90℃, react for 2-4 hours, and discharge when naturally cooled to room temperature to obtain modified acrylic emulsion.

2. The acrylic antistatic voltage-sensitive adhesive according to claim 1, characterized in that, The antioxidant is triisooctyl phosphite or triisodecyl phosphite; the solvent is acetone; and the curing agent is triethylenediamine.

3. The acrylic antistatic voltage-sensitive adhesive according to claim 1, characterized in that, The defoamer is polydimethylsiloxane.

4. The acrylic antistatic voltage-sensitive adhesive according to claim 1, characterized in that, In step (1), the emulsifier is sodium allyl hydroxypropyl sulfonate and the initiator is ammonium persulfate.

5. The acrylic antistatic voltage-sensitive adhesive according to claim 1, characterized in that, In step (1), the preparation method of the functional polymer monomer includes the following steps: Step A1: Add 2-methyl-5-vinylpyridine and acryloyloxyethyltrimethylammonium chloride to the solvent acetonitrile, stir evenly, then add the catalyst, and react at 70-80℃ for 6-12h in an anaerobic environment. Then cool, filter, wash and dry to obtain the reaction intermediate. Step A2: Add 3-chloro-1-butene and the reaction intermediate to anhydrous toluene, then add triethylamine. React at 60-80℃ for 10-12 hours in an oxygen-free environment. After cooling, filter, wash, and dry to obtain the functional polymer monomer.

6. The acrylic antistatic voltage-sensitive adhesive according to claim 5, characterized in that, In step A1, the catalyst is dimethyl azobisisobutyrate or azobisisobutyronitrile.

7. The acrylic antistatic voltage-sensitive adhesive according to claim 1, characterized in that, In step (2), the preparation process of the high-temperature resistant functional agent includes the following steps: Step B1: Add polysulfone to chloroform and stir for 30-50 min. Under inert gas protection, add chlorinating agent and anhydrous tin tetrachloride, heat to 60-70℃, react for 12-24 h, cool, filter, wash and dry to obtain polysulfone intermediate. Step B2: Disperse the polysulfone intermediate in N,N-dimethylacetamide, then add p-hydroxystyrene and an acid-binding agent, then purge with nitrogen gas, heat to 60-80℃, and react for 12-16 hours. After the reaction, add ethanol and let it stand to precipitate. After filtration, washing, and drying, the high-temperature resistant functional agent is obtained.

8. The acrylic antistatic voltage-sensitive adhesive according to claim 7, characterized in that, In step B1, the chlorinating agent is any one of chloromethyl ethyl ether, chloromethyl methyl ether, and 1,4-dichloromethoxybutane.

9. An acrylic antistatic voltage-sensitive adhesive according to claim 7, characterized in that, In step B2, the acid-binding agent is potassium carbonate or sodium carbonate.

10. The preparation process of an acrylic antistatic voltage-sensitive adhesive as described in claim 1, characterized in that, Includes the following steps: Step 1: Add the modified acrylate emulsion, antioxidant, and solvent to a stirrer according to the mass fraction, heat to 60-70℃, and stir for 1-1.5 hours to obtain the premixed solution; Step 2: Add the premixed liquid, curing agent, and defoamer to the mixer, heat to 60-70℃ and stir at 1000r / min for 1-3 hours. After standing and cooling, discharge the material to obtain an acrylic antistatic voltage-sensitive adhesive.

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