Electric response type acrylic acid adhesive transparent pressure-sensitive adhesive and preparation method thereof

Abstract

The invention relates to the field of stimuli-responsive optical transparent adhesive, and particularly discloses an electrical-responsive acrylic acid adhesive transparent pressure-sensitive adhesive and a preparation method thereof. The invention discloses an electric response type acrylic acid adhesive transparent pressure-sensitive adhesive. The transparent pressure-sensitive adhesive is prepared from the following raw material components in parts by weight: 42 to 52 parts of acrylate polymer, 10 parts of solvent A, 0.015 to 0.02 part of curing agent, 20 parts of solvent B and 2 to 10 parts of ionic salt, the Tg temperature of the acrylate polymer is 358 to 660 DEG C; the invention relates to a preparation method of an electrical response type acrylic acid adhesive transparent pressure-sensitive adhesive, which comprises the following steps: uniformly stirring and mixing an acrylate polymer and a solvent A to obtain a mixed solution A; uniformly stirring and mixing a curing agent and a solvent B to obtain a mixed solution B; mixing the mixed solution A with the mixed solution B, then adding ionic salt, and stirring for reaction to obtain the acrylic acid adhesive transparent pressure-sensitive adhesive.

Description

Technical Field

[0001] The present application relates to the field of stimulus-responsive optically transparent adhesives, and in particular to an electrically responsive acrylic adhesive transparent pressure-sensitive adhesive and a preparation method thereof. Background Art

[0002] Traditional adhesives are designed for permanent use and are not suitable for recycling. With the continuous development of industry, adhesives need to be redesigned to ensure the recycling of original materials. As a result, on-demand debonding agents are gradually developed for engineering applications. The debonding process of on-demand debonding agents is triggered by external stimuli, and commonly used stimulation methods are ultraviolet rays, temperature, etc. UV-stimulated debonding needs to be achieved at a specific wavelength and cannot be exposed to ultraviolet rays during the service life. Temperature as a trigger will limit the debonding temperature, and very high trigger temperatures are uneconomical and risk damaging the substrate. Therefore, it is urgent to develop an adhesive that is easy to debond. Summary of the invention

[0003] In order to improve the convenience of adhesive debonding, the present application provides an electrically responsive acrylic adhesive transparent pressure-sensitive adhesive and a preparation method thereof.

[0004] In the first aspect, the present application provides an electrically responsive acrylic adhesive transparent pressure-sensitive adhesive, which adopts the following technical solution: An electrically responsive acrylic adhesive transparent pressure-sensitive adhesive, wherein the raw materials of the transparent pressure-sensitive adhesive include the following components in parts by weight: 42-52 parts of an acrylic ester polymer, 10 parts of a solvent A, 0.015-0.02 parts of a curing agent, 20 parts of a solvent B, and 2-10 parts of an ion salt; the Tg temperature of the acrylic ester polymer is 358-660°C.

[0005] By adopting the above technical scheme, when the Tg temperature of the acrylate polymer is 358-660°C, ionic salts are added to the pressure-sensitive adhesive. The ionic salts have ionic conductivity, so that the obtained transparent pressure-sensitive adhesive has an electrical response effect. It can be debonded by applying a certain voltage, which is convenient and quick, and its bonding strength can be further adjusted as needed under different voltage control.

[0006] In a specific embodiment, the method for preparing the acrylic ester polymer comprises the following steps: The acrylate monomer and the functional acrylic monomer are added into a stirring tank and stirred, and then a thermal initiator is added and stirred to dissolve, and then the temperature is raised and stirred to react, and then cooled to obtain an acrylate polymer.

[0007] By adopting the above technical scheme, the acrylate monomer and the functional acrylic monomer are first mixed, and then a thermal initiator is added, the temperature is increased for reaction, and the mixture is cooled to obtain an acrylate polymer.

[0008] In a specific embodiment, the acrylic acid ester monomer includes multiple types of n-butyl acrylate, isooctyl acrylate, methyl methacrylate, butyl acrylate, hydroxyethyl acrylate, ethylene glycol dimethyl methacrylate, and isobutyl acrylate.

[0009] In a specific embodiment, the functional acrylic monomer includes one of methacrylic acid and acrylic acid.

[0010] In a specific embodiment, the thermal initiator includes one of dibenzoyl peroxide, ammonium persulfate, and azobisisobutyronitrile.

[0011] In a specific embodiment, the ionic salt is 1-butyl-3-methylimidazolium chloride.

[0012] In a specific embodiment, the curing agent includes isocyanic acid.

[0013] In a specific embodiment, the solvent A comprises ethyl acetate.

[0014] In a specific embodiment, the solvent B comprises toluene.

[0015] In the second aspect, the present application provides a method for preparing an electrically responsive acrylic adhesive transparent pressure-sensitive adhesive, which adopts the following technical solution: A method for preparing an electrically responsive acrylic adhesive transparent pressure-sensitive adhesive comprises the following steps: The acrylate polymer and solvent A are stirred and mixed evenly to obtain a mixed solution A; the curing agent and solvent B are stirred and mixed evenly to obtain a mixed solution B; the mixed solution A and the mixed solution B are mixed, and then an ion salt is added, stirred and reacted, and an acrylic adhesive transparent pressure-sensitive adhesive is obtained.

[0016] By adopting the above technical solution, the acrylate polymer is first dissolved in solvent A, then the curing agent is dissolved in solvent B, and then the two are mixed, and finally an ion salt is added and stirred to react, thereby obtaining an acrylic adhesive transparent pressure-sensitive adhesive with electrical response performance.

[0017] In summary, the present application includes at least one of the following beneficial technical effects: 1. In the present application, when the Tg temperature of the acrylate polymer is 358-660°C, an ionic salt is added to the pressure-sensitive adhesive. The ionic salt has ionic conductivity, so that the obtained transparent pressure-sensitive adhesive has an electrical response effect. It can be debonded by applying a certain voltage, which is convenient and quick, and its bonding strength can be further adjusted as needed under different voltage control; 2. In the present application, the acrylate monomer and the functional acrylic monomer are first mixed, and then a thermal initiator is added, the temperature is raised for reaction, and the acrylate polymer is obtained after cooling; 3. The method in the present application first dissolves the acrylate polymer in solvent A, then dissolves the curing agent in solvent B, and then mixes the two, and finally adds an ionic salt and stirs the reaction to obtain an acrylic adhesive transparent pressure-sensitive adhesive with electrical response performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a bar graph of the electroresponsive pressure-sensitive adhesive peeling force of the film sample.

[0019] Figure 2 This is a graph showing the peeling force variation of the film sample D47 in response to different voltage stimuli.

[0020] Figure 3 This is a graph showing the peeling force variation of the film sample D47 when it is electrically stimulated at different times.

[0021] Figure 4 It is the FTIR spectrum of film sample D47. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with embodiments.

[0023] All raw materials in the examples are commercially available.

[0024] Preparation Example Preparation Example 1 Preparation Example 1 provides a method for preparing an acrylate polymer, comprising the following steps: Add acrylate monomer and functional acrylic monomer into a stirring tank, stir at a speed of 500r / min for 30min, then add a thermal initiator, stir for 10min to dissolve, then heat to 60°C and stir to react for 1h, cool to room temperature, and obtain an acrylate polymer with a Tg temperature of 358°C; wherein the acrylate monomer includes a mixture of isooctyl acrylate, butyl acrylate, and methyl methacrylate, the functional acrylic monomer is acrylic acid, the thermal initiator is dibenzoyl peroxide, and the molar ratio of isooctyl acrylate, butyl acrylate, methyl methacrylate, acrylic acid, and dibenzoyl peroxide is 1.6:0.8:1.0:0.3:0.01.

[0025] Preparation Example 2 Preparation Example 2 provides a method for preparing an acrylate polymer, comprising the following steps: Add acrylate monomer and functional acrylic monomer into a stirring tank, stir at a speed of 500 r / min for 30 minutes, then add a thermal initiator, stir for 10 minutes to dissolve, then heat to 80°C and stir to react for 1 hour, cool to room temperature, and obtain an acrylate polymer with a Tg temperature of 559°C; wherein the acrylate monomer includes a mixture of methyl methacrylate and ethylene glycol methyl methacrylate, the functional acrylic monomer is methacrylic acid, the thermal initiator is azobisisobutyronitrile, and the molar ratio of methyl methacrylate, ethylene glycol methyl methacrylate, methacrylic acid, and azobisisobutyronitrile is 7.8:0.1:2.2:0.4.

[0026] Preparation Example 3 Preparation Example 3 provides a method for preparing an acrylic acid ester polymer, comprising the following steps: Add acrylate monomer and functional acrylic monomer into a stirring tank, stir at a speed of 500 r / min for 30 minutes, then add a thermal initiator, stir for 10 minutes to dissolve, then heat to 60°C and stir to react for 1 hour, cool to room temperature, and obtain an acrylate polymer with a Tg temperature of 660°C; wherein the acrylate monomer includes a mixture of methyl methacrylate and isobutyl acrylate, the functional acrylic monomer is methacrylic acid, the thermal initiator is ammonium persulfate, and the molar ratio of methyl methacrylate, isobutyl acrylate, methacrylic acid, and ammonium persulfate is 1.6:0.6:0.3:0.01.

[0027] Preparation Example 4 Preparation Example 4 provides a method for preparing an acrylate polymer, comprising the following steps: Add acrylate monomer and functional acrylic monomer into a stirring tank, stir at a speed of 500 r / min for 30 minutes, then add a thermal initiator, stir for 10 minutes to dissolve, then heat to 80°C and stir to react for 1 hour, cool to room temperature, and obtain an acrylate polymer with a Tg temperature of 456°C; wherein the acrylate monomer includes a mixture of methyl methacrylate and hydroxyethyl acrylate, the functional acrylic monomer is methacrylic acid, the thermal initiator is azobisisobutyronitrile, and the molar ratio of methyl methacrylate, hydroxyethyl acrylate, methacrylic acid, and azobisisobutyronitrile is 7.8:0.1:2.2:0.4.

[0028] Preparation Example 5 Preparation Example 5 provides a method for preparing an acrylate polymer, comprising the following steps: Add acrylate monomer and functional acrylic monomer into a stirring tank, stir at a speed of 500r / min for 30min, then add thermal initiator, stir for 10min to dissolve, then heat to 85°C and stir to react for 0.5h, cool to room temperature, and obtain an acrylate polymer with a Tg temperature of 263°C; wherein the acrylate monomer includes a mixture of methyl methacrylate, butyl acrylate, and hydroxyethyl acrylate, the functional acrylic monomer is methacrylic acid, the thermal initiator is ammonium persulfate, and the molar ratio of methyl methacrylate, butyl acrylate, hydroxyethyl acrylate, methacrylic acid, and ammonium persulfate is 1.0:0.8:0.1:0.3:0.04.

[0029] Preparation Example 6 Preparation Example 6 provides a method for preparing an acrylic acid ester polymer, comprising the following steps: Add acrylate monomer and functional acrylic monomer into a stirring tank, stir at a speed of 500 r / min for 30 minutes, then add a thermal initiator, stir for 10 minutes to dissolve, then heat to 85°C and stir to react for 0.5 hours, cool to room temperature, and obtain an acrylate polymer with a Tg temperature of 208°C; wherein the acrylate monomer includes a mixture of methyl methacrylate, butyl acrylate, and hydroxypropyl acrylate, the functional acrylic monomer is methacrylic acid, the thermal initiator is ammonium persulfate, and the molar ratio of methyl methacrylate, butyl acrylate, hydroxypropyl acrylate, methacrylic acid, and ammonium persulfate is 4.6:4.6:0.1:0.2:0.01.

[0030] Preparation Example 7 Preparation Example 7 provides a method for preparing an acrylic acid ester polymer, comprising the following steps: Add acrylate monomer and functional acrylic monomer into a stirring tank, stir at a speed of 500 r / min for 30 minutes, then add a thermal initiator, stir for 10 minutes to dissolve, then heat to 60°C and stir to react for 1 hour, cool to room temperature, and obtain an acrylate polymer with a Tg temperature of 292°C; wherein the acrylate monomer includes a mixture of methyl methacrylate and n-butyl acrylate, the functional acrylic monomer is acrylic acid, the thermal initiator is ammonium persulfate, and the molar ratio of methyl methacrylate, n-butyl acrylate, acrylic acid, and ammonium persulfate is 3.2:0.6:0.9:0.01.

[0031] Preparation Example 8 Preparation Example 8 provides a method for preparing an acrylate polymer, comprising the following steps: Add acrylate monomer and functional acrylic monomer into a stirring tank, stir at a speed of 500 r / min for 30 minutes, then add a thermal initiator, stir for 10 minutes to dissolve, then heat to 60°C and stir to react for 1 hour, cool to room temperature, and obtain an acrylate polymer with a Tg temperature of 252°C; wherein the acrylate monomer includes a mixture of isooctyl acrylate, butyl acrylate, and methyl methacrylate, the functional acrylic monomer is acrylic acid, the thermal initiator is dibenzoyl peroxide, and the molar ratio of isooctyl acrylate, butyl acrylate, methyl methacrylate, acrylic acid, and dibenzoyl peroxide is 4.8:2.4:1.0:0.9:0.01. Example

[0032] Example 1 Embodiment 1 provides a method for preparing an electrically responsive acrylic adhesive transparent pressure-sensitive adhesive, comprising the following steps: 50 g of the acrylic ester polymer in Preparation Example 1 was mixed with 10 g of solvent A, and stirred at a speed of 500 r / min for 1 min to obtain a mixed solution A; 0.02 g of a curing agent was mixed with 20 g of a solvent B, and stirred at a speed of 500 r / min for 1 min to obtain a mixed solution B; the mixed solution A was mixed with the mixed solution B, and then 10 g of an ionic salt was added, and the mixture was stirred and reacted at a speed of 500 r / min for 30 min to obtain an acrylic adhesive transparent pressure-sensitive adhesive; wherein the solvent A was ethyl acetate; the curing agent was isocyanic acid; the solvent B was toluene; and the ionic salt was 1-butyl-3-methylimidazolium chloride.

[0033] Example 2 Embodiment 2 provides a method for preparing an electrically responsive acrylic adhesive transparent pressure-sensitive adhesive, comprising the following steps: 52g of the acrylate polymer in Preparation Example 2 was mixed with 10g of solvent A, and stirred at a speed of 500r / min for 1min to obtain a mixed solution A; 0.02g of a curing agent was mixed with 20g of a solvent B, and stirred at a speed of 500r / min for 1min to obtain a mixed solution B; the mixed solution A was mixed with the mixed solution B, and then 10g of an ionic salt was added, and the mixture was stirred at a speed of 500r / min for 30min to obtain an acrylic adhesive transparent pressure-sensitive adhesive; wherein the solvent A was ethyl acetate; the curing agent was isocyanic acid; the solvent B was toluene; and the ionic salt was 1-butyl-3-methylimidazolium chloride.

[0034] Example 3 Embodiment 3 provides a method for preparing an electrically responsive acrylic adhesive transparent pressure-sensitive adhesive, comprising the following steps: 42 g of the acrylic ester polymer in Preparation Example 3 was mixed with 10 g of solvent A, and stirred at a speed of 500 r / min for 1 min to obtain a mixed solution A; 0.02 g of a curing agent was mixed with 20 g of a solvent B, and stirred at a speed of 500 r / min for 1 min to obtain a mixed solution B; the mixed solution A was mixed with the mixed solution B, and then 2 g of an ionic salt was added, and the mixture was stirred and reacted at a speed of 500 r / min for 30 min to obtain an acrylic adhesive transparent pressure-sensitive adhesive; wherein the solvent A was ethyl acetate; the curing agent was isocyanic acid; the solvent B was toluene; and the ionic salt was 1-butyl-3-methylimidazolium chloride.

[0035] Example 4 Example 4 provides a method for preparing an electrically responsive acrylic adhesive transparent pressure-sensitive adhesive, comprising the following steps: mixing 52 g of the acrylic ester polymer in Preparation Example 4 with 10 g of solvent A, stirring at a speed of 500 r / min for 1 min to obtain a mixed solution A; mixing 0.015 g of a curing agent with 20 g of solvent B, stirring at a speed of 500 r / min for 1 min to obtain a mixed solution B; mixing the mixed solution A with the mixed solution B, then adding 10 g of an ionic salt, stirring and reacting at a speed of 500 r / min for 30 min to obtain an acrylic adhesive transparent pressure-sensitive adhesive; wherein solvent A is ethyl acetate; the curing agent is isocyanic acid; solvent B is toluene; and the ionic salt is 1-butyl-3-methylimidazolium chloride.

[0036] Comparative Example Comparative Example 1 Comparative Example 1 provides a method for preparing an acrylic adhesive transparent pressure-sensitive adhesive, comprising the following steps: 51 g of the acrylic ester polymer in Preparation Example 5 was mixed with 10 g of solvent A, and stirred at a speed of 500 r / min for 1 min to obtain a mixed solution A; 0.02 g of a curing agent was mixed with 20 g of a solvent B, and stirred at a speed of 500 r / min for 1 min to obtain a mixed solution B; the mixed solution A was mixed with the mixed solution B, and then 10 g of an ionic salt was added, and the mixture was stirred and reacted at a speed of 500 r / min for 30 min to obtain an acrylic adhesive transparent pressure-sensitive adhesive; wherein the solvent A was ethyl acetate; the curing agent was isocyanic acid; the solvent B was toluene; and the ionic salt was 1-butyl-3-methylimidazolium chloride.

[0037] Comparative Example 2 Comparative Example 2 provides a method for preparing an acrylic adhesive transparent pressure-sensitive adhesive, comprising the following steps: 58 g of the acrylic ester polymer in Preparation Example 6 was mixed with 10 g of solvent A, and stirred at a speed of 500 r / min for 1 min to obtain a mixed solution A; 0.02 g of a curing agent was mixed with 20 g of a solvent B, and stirred at a speed of 500 r / min for 1 min to obtain a mixed solution B; the mixed solution A was mixed with the mixed solution B, and then 10 g of an ionic salt was added, and the mixture was stirred and reacted at a speed of 500 r / min for 30 min to obtain an acrylic adhesive transparent pressure-sensitive adhesive; wherein the solvent A was ethyl acetate; the curing agent was isocyanic acid; the solvent B was toluene; and the ionic salt was 1-butyl-3-methylimidazolium chloride.

[0038] Comparative Example 3 Comparative Example 3 provides a method for preparing an acrylic adhesive transparent pressure-sensitive adhesive, comprising the following steps: 43 g of the acrylic ester polymer in Preparation Example 7 was mixed with 10 g of solvent A, and stirred at a speed of 500 r / min for 1 min to obtain a mixed solution A; 0.02 g of a curing agent was mixed with 20 g of a solvent B, and stirred at a speed of 500 r / min for 1 min to obtain a mixed solution B; the mixed solution A was mixed with the mixed solution B, and then 2 g of an ionic salt was added, and the mixture was stirred and reacted at a speed of 500 r / min for 30 min to obtain an acrylic adhesive transparent pressure-sensitive adhesive; wherein the solvent A was ethyl acetate; the curing agent was isocyanic acid; the solvent B was toluene; and the ionic salt was 1-butyl-3-methylimidazolium chloride.

[0039] Comparative Example 4 Comparative Example 4 provides a method for preparing an acrylic adhesive transparent pressure-sensitive adhesive, comprising the following steps: 60 g of the acrylic ester polymer in Preparation Example 8 was mixed with 10 g of solvent A, and stirred at a speed of 500 r / min for 1 min to obtain a mixed solution A; 0.02 g of a curing agent was mixed with 20 g of a solvent B, and stirred at a speed of 500 r / min for 1 min to obtain a mixed solution B; the mixed solution A was mixed with the mixed solution B, and then 10 g of an ionic salt was added, and the mixture was stirred and reacted at a speed of 500 r / min for 30 min to obtain an acrylic adhesive transparent pressure-sensitive adhesive; wherein the solvent A was ethyl acetate; the curing agent was isocyanic acid; the solvent B was toluene; and the ionic salt was 1-butyl-3-methylimidazolium chloride.

[0040] Application Examples Application Example 1 Application Example 1 provides a method for preparing an adhesive film, comprising the following steps: The pressure-sensitive adhesive in Example 1 was coated on a polyethylene release film and put into an oven at 85° C. for curing for 5 minutes to obtain an adhesive film sample A45 with an adhesive thickness of 40 μm.

[0041] Application Example 2 Application Example 2 provides a method for preparing an adhesive film, comprising the following steps: The pressure-sensitive adhesive in Comparative Example 1 was coated on a polyethylene release film and cured in an oven at 85° C. for 5 minutes to obtain an adhesive film sample B36 with an adhesive thickness of 40 μm.

[0042] Application Example 3 Application Example 3 provides a method for preparing an adhesive film, comprising the following steps: The pressure-sensitive adhesive in Comparative Example 2 was coated on a polyethylene release film and cured in an oven at 85° C. for 5 minutes to obtain an adhesive film sample C18 with an adhesive thickness of 40 μm.

[0043] Application Example 4 Application Example 4 provides a method for preparing an adhesive film, comprising the following steps: The pressure-sensitive adhesive in Example 2 was coated on a polyethylene release film and cured in an oven at 85° C. for 5 minutes to obtain an adhesive film sample D47 with an adhesive thickness of 40 μm.

[0044] Application Example 5 Application Example 5 provides a method for preparing an adhesive film, comprising the following steps: The pressure-sensitive adhesive in Example 3 was coated on a polyethylene release film and cured in an oven at 85° C. for 5 minutes to obtain an adhesive film sample E15 with an adhesive thickness of 40 μm.

[0045] Application Example 6 Application Example 6 provides a method for preparing an adhesive film, comprising the following steps: The pressure-sensitive adhesive in Comparative Example 3 was coated on a polyethylene release film and cured in an oven at 85° C. for 5 minutes to obtain an adhesive film sample F02 with an adhesive thickness of 40 μm.

[0046] Application Example 7 Application Example 7 provides a method for preparing an adhesive film, comprising the following steps: The pressure-sensitive adhesive in Example 4 was coated on a polyethylene release film and put into an oven at 85° C. for curing for 5 minutes to obtain an adhesive film sample G38 with an adhesive thickness of 40 μm.

[0047] Application Example 8 Application Example 8 provides a method for preparing an adhesive film, comprising the following steps: The pressure-sensitive adhesive in Comparative Example 4 was coated on a polyethylene release film and put into an oven at 85° C. for curing for 5 minutes to obtain an adhesive film sample H54 with an adhesive thickness of 40 μm.

[0048] Performance test Adhesion performance: Test the peeling force of the film samples in each application example. The greater the peeling force, the better the adhesion performance of the pressure-sensitive adhesive. The peeling force data is as follows: Figure 1 shown.

[0049] Electrical response performance: The film samples in each application example are subjected to a weight electrical response fall-off test to obtain the weight fall-off time. NG indicates that the pressure-sensitive adhesive has no electrical response performance.

[0050] Electrical stimulation response detection: Test the peeling force data of film sample D47 under different voltages. The peeling force data is as follows: Figure 2 As shown; 15V was selected as the constant voltage of the electrical stimulation response experiment, and the peeling force test of the film sample D47 was carried out at different electrical stimulation response times of 10s, 30s, 60s, 300s, and 600s. The peeling force data are shown in Figure 3 shown.

[0051] FTIR spectrum detection: FTIR spectrum detection was performed on the film sample D47 before applying voltage, and after applying 15V for 30s, 15V for 1min, 15V for 5min, 15V for 10min, and 15V for 15min, see Figure 4 .

[0052] Table 1 Weight shedding time of film samples sample Weight falling time (s) Application Example 1 32 Application Example 2 NG Application Example 3 NG Application Example 4 5 Application Example 5 20 Application Example 6 NG Application Example 7 300 Application Example 8 NG Combined with Table 1 and Application Examples 1-8, when the film samples in Application Example 1, Application Example 4, Application Example 5 and Application Example 7 were subjected to the weight electric response falling off experiment, the weight fell off, so that the pressure-sensitive adhesive in Examples 1-4 had electric response performance. It can be seen that when the Tg temperature of the acrylate polymer is 358-660°C, ionic salts are added to the pressure-sensitive adhesive, and the ionic salts have ionic conductivity, so that the obtained transparent pressure-sensitive adhesive can have an electric response effect.

[0053] Combination Figure 1 As shown in Table 1, the pressure-sensitive adhesive in Example 2 has the best bonding performance, and the weight-falling time of the adhesive film sample D47 is the fastest, so the electrical response performance of the pressure-sensitive adhesive in Example 2 is the best.

[0054] Table 2 Peel force data of film sample D47 in response to different voltage stimulations Voltage (V) Peel force after electrical response (gf / 25mm) 0 1581.89 5 271.35 10 19.95 12 14.71 15 10.53 Combination Figure 2 From Table 2, it can be seen that when the voltage is 15 V, the peeling force decreases more after power-on than at other voltages.

[0055] Table 3 Peel force data of film sample D47 at different electrical response times Time(s) Peel force after electrical response (gf / 25mm) 0 1581.89 10 1090.34 30 196.36 60 74.91 300 28.08 600 0.54 Combination Figure 3 From Table 3, it can be seen that the peel force of the electrically responsive acrylic pressure-sensitive adhesive gradually decreases with the increase of the electrical stimulation response time, and can drop to below 100 gf / 25 mm in 60 s.

[0056] Combination Figure 4 , red stripe 1573cm -1 The peak intensity at 1350cm -1 The peak at gradually becomes smaller, indicating that the electrically responsive pressure-sensitive adhesive can be peeled off at the cathode. This is because after the voltage is applied, the amide bond formed by the imidazole cation in the ionic salt in the original pressure-sensitive adhesive and the acrylic adhesive gradually disappears, while the strength of CN in imidazole gradually increases. This proves that a reduction reaction occurs between the ionic liquid and the acrylic adhesive. After the electrical response stimulus is given, the ionic liquid begins to migrate, eventually leading to the peeling of the tape from the adhered object.

[0057] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. An electrically responsive acrylic adhesive transparent pressure-sensitive adhesive, characterized in that: The raw materials of the transparent pressure-sensitive adhesive include the following components in parts by weight: 42-52 parts of acrylate polymer, 10 parts of solvent A, 0.015-0.02 parts of curing agent, 20 parts of solvent B, and 2-10 parts of ion salt; the Tg temperature of the acrylate polymer is 358-660°C.

2. The electrically responsive acrylic adhesive transparent pressure-sensitive adhesive according to claim 1, characterized in that: The preparation method of the acrylic acid ester polymer comprises the following steps: The acrylate monomer and the functional acrylic monomer are added into a stirring tank and stirred, and then a thermal initiator is added and stirred to dissolve, and then the temperature is raised and stirred to react, and then cooled to obtain an acrylate polymer.

3. The electrically responsive acrylic adhesive transparent pressure-sensitive adhesive according to claim 2, characterized in that: The acrylic acid ester monomers include multiple types of n-butyl acrylate, isooctyl acrylate, methyl methacrylate, butyl acrylate, hydroxyethyl acrylate, ethylene glycol dimethyl methacrylate, and isobutyl acrylate.

4. The electrically responsive acrylic adhesive transparent pressure-sensitive adhesive according to claim 2, characterized in that: The functional acrylic monomer includes one of methacrylic acid and acrylic acid.

5. The electrically responsive acrylic adhesive transparent pressure-sensitive adhesive according to claim 2, characterized in that: The thermal initiator includes one of dibenzoyl peroxide, ammonium persulfate, and azobisisobutyronitrile.

6. The electrically responsive acrylic adhesive transparent pressure-sensitive adhesive according to claim 1, characterized in that: The ionic salt is 1-butyl-3-methylimidazolium chloride.

7. The electrically responsive acrylic adhesive transparent pressure-sensitive adhesive according to claim 1, characterized in that: The curing agent includes isocyanic acid.

8. The electrically responsive acrylic adhesive transparent pressure-sensitive adhesive according to claim 1, characterized in that: The solvent A includes ethyl acetate.

9. The electrically responsive acrylic adhesive transparent pressure-sensitive adhesive according to claim 1, characterized in that: The solvent B includes toluene.

10. A method for preparing the electrically responsive acrylic adhesive transparent pressure-sensitive adhesive according to any one of claims 1 to 3, characterized in that: The following steps are involved: The acrylate polymer and solvent A are stirred and mixed evenly to obtain a mixed solution A; the curing agent and solvent B are stirred and mixed evenly to obtain a mixed solution B; the mixed solution A and the mixed solution B are mixed, and then an ion salt is added, stirred and reacted, and an acrylic adhesive transparent pressure-sensitive adhesive is obtained.

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