Electroinduced viscosity-reducing glue as well as preparation method and application thereof

Abstract

The invention provides an electrogenerated viscosity-reducing adhesive as well as a preparation method and application thereof. The electro-induced viscosity-reducing glue comprises modified acrylate resin, the PDI of the modified acrylate resin is larger than 2.5 and smaller than 5, the weight-average molecular weight of the modified acrylate resin is 300,000-800,000, and the electro-induced viscosity-reducing glue using the modified acrylate resin is wide in PDI range, a low-molecular-weight part can be preferentially ionized or polarized, an electric field is rapidly responded, and the adhesive force is triggered to be reduced; the high-molecular-weight part can maintain the integrity of the material, excessive softening or breakage of the adhesive layer in the electrical stimulation process is avoided, and meanwhile, the weight-average molecular weight is within 300,000-800,000, and the bonding strength in the adhesive layer can also be improved; pDI and weight-average molecular weight are matched, so that the normal-temperature retention time can be prolonged. Therefore, the electrogenerated viscosity-reducing glue is short in debonding time, the normal-temperature retention time is prolonged, the initial adhesion strength is high, and the glue layer is prevented from being excessively softened or broken in the electrical stimulation process.

Description

Technical Field

[0001] This application relates to the technical field of electro-tack reducers, and in particular to an electro-tack reducer, its preparation method, and its application. Background Technology

[0002] Electro-adhesives are smart adhesive materials that achieve reversible control of adhesion through external electrical stimulation. In recent years, they have shown significant application potential in fields such as electronic device recycling, medical device disassembly, the automotive industry, and aerospace. Traditional adhesives (such as epoxy resins, acrylates, or polyurethanes) typically achieve bonding and separation through thermal, chemical, or mechanical methods, but these methods suffer from problems such as high energy consumption, environmental pollution, or damage to the substrate.

[0003] To facilitate the cleaning or removal of adhesives or tapes after use, electrostrictive adhesive tapes have been developed. These tapes combine electrical and adhesive technologies, achieving controlled peeling between the tape and the bonded surface by applying voltage. However, current electrostrictive adhesives suffer from problems such as long peeling times, weak initial adhesion strength, short adhesion time, and excessive softening or cracking of the adhesive layer during electrical stimulation. Summary of the Invention

[0004] The purpose of this application is to provide an electro-tack reducer, its preparation method and application, so as to improve the problems of slow de-adhesion, low adhesion strength and short adhesion time of the existing electro-tack reducer.

[0005] For the purposes mentioned above, this application provides the following technical solution: This application provides an electro-tack reducer, comprising: a modified acrylate resin, wherein the polymer dispersibility index of the modified acrylate resin is: 2.5 < PDI < 5.

[0006] Furthermore, the weight-average molecular weight of the modified acrylate resin is 300,000 to 800,000.

[0007] Furthermore, the modified acrylate resin is a copolymer comprising segments A, B, and C, and has the following structural formula: , where 140≤a≤160, 100≤b≤120, 200≤c≤220.

[0008] Furthermore, segment A is a polymer block of a soft monomer; segment B is a polymer block of a hard monomer; and segment C is a polymer block of a functional monomer. Furthermore, the functional monomer is an unsaturated polyester phosphate ester; The unsaturated polyester phosphate is selected from at least one of the following compounds. ; Furthermore, the viscous monomer is selected from methyl acrylate, isooctyl acrylate, lauryl acrylate, isobornyl methacrylate, N-methylpyrrolidone, butyl acrylate, acrylonitrile, styrene, and methyl methacrylate. Furthermore, the functional monomer is selected from at least one of hydroxyethyl acrylate, hydroxypropyl acrylate, diethylaminoethyl methacrylate, glycidyl methacrylate, methacrylic acid, 2-hydroxypropyl acrylate, methacrylamide, and N-hydroxymethylacrylamide.

[0009] Furthermore, the electro-tack reducer also includes a conductive agent, an ionic liquid, and a solvent; Furthermore, the conductive agent accounts for 2% to 5% of the mass of the electro-tack reducer, the ionic liquid accounts for 15% to 25% of the mass of the electro-tack reducer, and the solvent accounts for 40% to 60% of the mass of the electro-tack reducer.

[0010] Furthermore, the conductive agent is selected from at least one of graphene, acetylene black, and conductive carbon black; Furthermore, the ionic liquid comprises anions and cations, the cations including at least one of imidazolium cations, pyridinium cations, and ammonium cations; the anions are at least one of sulfonylimides, tetrafluoroborates, and dicyandiamides; and the solvent is selected from at least one of ethyl acetate, butyl acetate, and propyl acetate.

[0011] Furthermore, the electro-tack reducer also includes additives, which include at least one of a curing agent, an anti-aging agent, and a leveling agent.

[0012] This application provides an electro-tack tape, which includes an electro-tack layer, wherein the electro-tack layer is obtained by curing the above-mentioned electro-tack tape.

[0013] Furthermore, when the electro-tack reducing layer is energized at 10V and treated with aluminum foil transfer, the peel strength decreases to below 50gf / 25mm.

[0014] Furthermore, the thickness of the electro-viscosity-reducing layer is 40~60μm.

[0015] This application provides a method for preparing an electro-adhesive tape, comprising the following steps: Provide a release film, the above-mentioned electro-tack reducer, and a curing agent; mix the electro-tack reducer and the curing agent to obtain a mixture; apply the mixture onto the release film, heat-treat at 100~150℃ for 30~60 minutes, and mold to obtain an anti-tack tape.

[0016] Furthermore, the curing agent is one or more of toluene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, and diphenylmethane diisocyanate; Furthermore, the amount of curing agent added is 0.05~0.1% of the weight of the electro-tack reducer.

[0017] This application provides a method for preparing a modified acrylate resin, comprising the following steps: mixing 30-60% viscous monomer, 1-10% functional monomer, 1-5% special copolymer monomer, 0.1-1% initiator, and 40-60% solvent to obtain a reaction solution; A portion of the reaction solution was reacted at 60-80℃ for 0.5-2.5 hours under inert gas protection to obtain a prepolymer solution; The remaining reaction solution is continuously or intermittently added to the prepolymer solution in multiple batches, and the reaction is carried out at 60~80℃ for 3~5 hours under inert gas protection to obtain modified acrylate resin.

[0018] Furthermore, the mass percentage of the reaction solution used to form the prepolymer liquid in the reaction liquid does not exceed 50%.

[0019] Furthermore, the initiator is selected from at least one of AIBN (azobisisobutyronitrile) or BPO (benzoyl peroxide).

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: By applying modified acrylate resins with a wide polymer dispersibility index to electro-tack reducers, the low molecular weight resins preferentially ionize or polarize, rapidly responding to the electric field to trigger a decrease in adhesion and shortening the detack time; the high molecular weight resins can maintain the integrity of the material and prevent excessive softening or cracking of the adhesive layer during electrical stimulation; combining modified acrylate resins PDI and weight-average molecular weight can also improve the holding time at room temperature.

[0021] The preparation method of the electro-tack reducing adhesive of the present invention is simple and low in cost. In the preparation process, by controlling the process parameters and promoting the interaction between the raw materials, a high-performance electro-tack reducing adhesive can be obtained, which can be widely used in electro-tack reducing adhesive tapes. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a molecular weight distribution diagram of the prepolymer provided in Example 1 of this application; Figure 2This is a molecular weight distribution diagram of the product after the first addition of monomer provided in Example 1 of this application; Figure 3 A molecular weight distribution diagram of the final product provided in Example 1 of this application; Figure 4 Infrared spectrum of the final product provided in Example 1 of this application; Figure 5 The molecular weight distribution diagram of the final product provided in Example 2 of this application; Figure 6 This is a molecular weight distribution diagram of the prepolymer provided in Example 3 of this application; Figure 7 This is a molecular weight distribution diagram of the product after the first addition of monomer provided in Example 3 of this application; Figure 8 The molecular weight distribution diagram of the final product provided in Example 3 of this application; Figure 9 The molecular weight distribution diagram of the final product provided for Comparative Example 1 of this application; Figure 10 The molecular weight distribution diagram of the final product provided for Comparative Example 2 of this application. Detailed Implementation

[0024] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] Existing technologies for improving the performance of electro-tack reducing adhesives mainly focus on the desorption time and adhesion strength. The applicant has found that while existing electro-tack reducing adhesives can rapidly detack under a certain voltage, they struggle to maintain adhesion for a considerable period before detack reduction. Based on adhesion requirements, electro-tack reducing adhesives not only need rapid detack reduction under voltage but also need to maintain high adhesion strength before detack reduction. Therefore, the applicant provides an electro-tack reducing adhesive that balances cohesion and peel force by controlling the PDI (peel density index), enabling rapid detack reduction under energization while maintaining long-lasting and high-strength adhesion before electro-tack reduction. The electro-tack reducing adhesive provided in this application achieves rapid detack reduction while simultaneously possessing high peel strength and adhesion retention without electro-tack reduction, demonstrating promising application prospects.

[0026] In a first aspect, embodiments of this application provide an electro-tack reducer, comprising a modified acrylate resin, wherein the polymer dispersibility index of the modified acrylate resin is 2.5 < PDI < 5.

[0027] PDI stands for Polymer Dispersion Index, which describes the molecular weight distribution of polymers.

[0028] Gel permeation chromatography (GPC) was used to estimate the molecular weight distribution (PDI) by measuring the separation time of different molecules in the chromatographic column.

[0029] The formula for calculating PDI is: PDI = mass-average molecular weight (Mw) / number-average molecular weight (Mn). The closer the ratio is to 1, the more uniform the molecular weight distribution.

[0030] Preferably, the polymer dispersibility index (PDI) of the modified acrylate resin is 2.5 < PDI < 5.0.

[0031] By applying modified acrylate resins with a wide polymer dispersibility index to electro-tack reducers, the low molecular weight resins preferentially ionize or polarize, rapidly responding to the electric field to trigger a decrease in adhesion and shortening the detack time; the high molecular weight resins can maintain the integrity of the material and avoid excessive softening or cracking of the adhesive layer during electrical stimulation.

[0032] In some embodiments, the weight-average molecular weight of the modified acrylate resin is 300,000 to 800,000.

[0033] Controlling the weight-average molecular weight of the modified acrylic resin within the above range can improve the bonding strength within the adhesive layer and prevent excessive softening during electrical triggering.

[0034] Combining modified acrylate resin PDI with weight-average molecular weight can also improve the holding time at room temperature.

[0035] In some embodiments, the modified acrylate resin is a copolymer comprising segments A, B, and C, and has the following structural formula: Wherein, 140≤a≤160, 100≤b≤120, 200≤c≤220; Segment A is a polymer block of viscous monomers; Segment B is a polymer block of functional monomers; Segment C is a polymer block of copolymerized special monomers. In some embodiments, the comonomer is an unsaturated polyester phosphate ester; Unsaturated polyester phosphate esters are selected from at least one of the following compounds: ; Embedding unsaturated polyester phosphate esters into modified acrylic resins can improve the peel strength of electro-induced anti-tack adhesives.

[0036] The viscous monomer is selected from at least one of methyl acrylate, isooctyl acrylate, lauryl acrylate, isobornyl methacrylate, N-methylpyrrolidone, butyl acrylate, acrylonitrile, styrene, and methyl methacrylate; Preferably, the viscous monomer is selected from at least one of methyl acrylate, butyl acrylate, acrylonitrile, styrene, and methyl methacrylate.

[0037] The functional monomer is selected from at least one of hydroxyethyl acrylate, hydroxypropyl acrylate, diethylaminoethyl methacrylate, glycidyl methacrylate, methacrylic acid, 2-hydroxypropyl acrylate, methacrylamide, and N-hydroxymethylacrylamide.

[0038] Preferably, the functional monomer is selected from at least one of hydroxyethyl acrylate, methacrylic acid, 2-hydroxypropyl acrylate, methacrylamide, and N-hydroxymethylacrylamide.

[0039] In some embodiments, electro-tack reducers also include conductive agents, ionic liquids, and solvents; The conductive agent accounts for 2% to 5% of the mass of the electro-tack reducer, the ionic liquid accounts for 15% to 25% of the mass of the electro-tack reducer, and the solvent accounts for 40% to 60% of the mass of the electro-tack reducer.

[0040] The conductive agent is selected from at least one of graphene, acetylene black, and conductive carbon black; the ionic liquid contains anions and cations, and the cations include at least one of imidazolium cations, pyridinium cations, and ammonium cations; the anions are at least one of sulfonylimide, tetrafluoroborate, and dicyandiamide; the solvent is selected from at least one of ethyl acetate, butyl acetate, and propyl acetate.

[0041] In some embodiments, the electro-tack reducer further includes additives, including at least one of a curing agent, an anti-aging agent, and a leveling agent.

[0042] The curing agent can be any one of isophorone diisocyanate or hexamethylene diisocyanate; the anti-aging agent can be any one of BHT (butylated hydroxytoluene), triphenyl phosphite (TPP), or DSTDP (distearate thiodipropionate); and the leveling agent can be any one of polyether polyester modified organosiloxane or alkyl modified organosiloxane.

[0043] This application also provides an electro-tack tape, including an electro-tack layer, which is obtained by curing the above-mentioned electro-tack tape.

[0044] In some embodiments, the peel strength of the electro-tack-reducing layer decreases to below 50gf / 25mm after aluminum foil transfer treatment at 10V.

[0045] In some embodiments, the thickness of the electro-tack-reducing layer is 40~60μm.

[0046] This application also provides a method for preparing an electro-adhesive tape. In some embodiments, an electro-tack reducer and a curing agent are mixed to obtain a mixture; the mixture is applied to a release film and heat-treated at 100~150°C for 30~60 minutes to obtain a tack reducer tape.

[0047] Preferably, the release film is selected from low basis weight release films.

[0048] In some embodiments, the curing agent is one or more of toluene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, and diphenylmethane diisocyanate.

[0049] In some embodiments, the amount of curing agent added is 0.05 to 0.1% of the weight of the electro-tack reducer.

[0050] This application also provides a method for preparing a modified acrylate resin, comprising the following steps: Mix 30-60% viscous monomer, 1-10% functional monomer, 1-5% copolymer special monomer, 0.1-1% initiator, and 40-60% solvent to obtain a reaction solution; A portion of the reaction solution was reacted at 60-80℃ for 0.5-2.5 hours under inert gas protection to obtain a prepolymer solution; The remaining reaction solution is continuously or intermittently added to the prepolymer solution in multiple batches, and the reaction is carried out at 60~80℃ for 3~5 hours under inert gas protection to obtain modified acrylate resin.

[0051] In some embodiments, the mass percentage of the reaction solution used to form the prepolymer solution does not exceed 50% of the total mass of the reaction solution.

[0052] If the mass percentage of the reaction solution in the reaction solution is less than 50%, the active sites for free radical chain growth will be exposed too little, resulting in the inability to achieve chain growth. Therefore, the mass percentage of the reaction solution used in the prepolymer solution should be controlled to not exceed 50%.

[0053] In some embodiments, the initiator is selected from at least one of AIBN (azobisisobutyronitrile) or BPO (benzoyl peroxide).

[0054] In order to enable those skilled in the art to clearly understand the above-described implementation details and operations of this application, and to demonstrate the significant improvement in the performance of the electro-tack reducing adhesive provided by the embodiments of this application, the above technical solutions are illustrated below through examples.

[0055] Example 1 1. Preparation method of modified acrylate resin: (1) Weigh 30g of LA (lauryl acrylate), 30g of BA (butyl acrylate), 2g of HPA (hydroxypropyl acrylate), 3g of MMA (methyl methacrylate), 2g of HEAMP (formula I-3), 1g of BPO (benzoyl peroxide), and 80g of EA (ethyl acetate), add them to a three-necked flask, purge with nitrogen, start stirring, rotate at 500 rpm, heat to 60℃, and continue the reaction for 2 hours to obtain the first prepolymer.

[0056] (2) First addition of monomers: Weigh 15g of LA, 15g of BA, 2g of HPA, 1.5g of MMA, 2g of HEAMP, 0.3g of BPO, and 40g of EA, mix them evenly, and add them dropwise to the above prepolymer. The dropwise addition time is 1h, the temperature is maintained at 70℃, and the reaction is continued for 2h to obtain the second prepolymer. The PDI of this time should reach above 2.5.

[0057] (3) Second addition of monomers: Weigh 15g of LA, 15g of BA, 2g of HPA, 1.5g of MMA, 2g of HEAMP, 0.3g of BPO, and 40g of EA, mix them evenly, and add them dropwise to the second prepolymer over a period of 1 hour. Maintain the reaction temperature at 70℃ and continue the reaction for 4 hours to obtain the final product. The weight-average molecular weight of the product is 511,533, and the PDI is 3.93.

[0058] 2. Preparation of electro-tack reducers: The modified acrylate resin, 0.2g of graphene conductive agent, 2.4g of ionic liquid (1-butyl-3-methylimidazolium tetrafluoroborate), and 12.0g of ethyl acetate solvent were mixed evenly to obtain an electrostrictive adhesive.

[0059] 3. Preparation of electro-adhesive tape: IPDI (isophorone diisocyanate) trimer curing agent was added to the above electro-tack reducer. The toluene diisocyanate was added at a ratio of 0.07~0.1% of the electro-tack reducer weight. The mixture was coated onto a 50μm low-basis-weight release film with a film thickness of 50μm and baked at 100~150℃ for 10min to obtain an electro-tack reducer tape.

[0060] Example 2 Basically the same as Example 1, except for the first addition of monomers: weigh 20g of LA, 20g of BA, 2g of HPA, 2g of MMA, 4g of HEAMP, 0.3g of BPO, and 40g of EA, mix them evenly, and add them dropwise to the above prepolymer for 1 hour. Maintain the temperature at 60°C and continue the reaction for 2 hours. The PDI of the second prepolymer should reach 2.5 or higher.

[0061] Second monomer addition: Weigh 10g of LA, 10g of BA, 1g of HPA, 1g of MMA, 1g of HEAMP (Formula I-3), 0.3g of BPO, and 40g of EA. Mix thoroughly and add dropwise to the second prepolymer over 1 hour. Maintain the reaction temperature at 70°C and continue the reaction for 4 hours to obtain the final product. The weight-average molecular weight of the product is 323,662, and the PDI is 4.02.

[0062] Example 3 Basically the same as Example 1, except that the viscous monomer raw material and temperature used in the preparation method of the modified acrylate resin are different: Weigh 30g of 2-EHA (isooctyl acrylate), 30g of BA, 2g of HPA, 3g of MMA, 2g of HEAMP (Formula I-3), 1g of BPO, and 80g of EA, add them to a three-necked flask, purge with nitrogen, start stirring at 500 rpm, heat to 60°C, and continue the reaction for 3 hours to obtain the first prepolymer.

[0063] (2) First addition of monomers: Weigh 15g of 2-EHA, 15g of BA, 2g of HPA, 1.5g of MMA, 2g of HEAMP, 0.3g of BPO, and 40g of EA. Mix them evenly and add them to the above prepolymer by dropping. The dropping time is 1h, the temperature is maintained at 70℃, and the reaction is continued for 2h. The PDI of the second prepolymer should reach 2.5 or higher.

[0064] (3) Second addition of monomers: Weigh 15g of 2-EHA, 15g of BA, 2g of HPA, 1.5g of MMA, 2g of HEAMP, 0.3g of BPO, and 40g of EA, mix them evenly, and add them dropwise to the second prepolymer over a period of 1 hour. Maintain the reaction temperature at 70℃ and continue the reaction for 4 hours to obtain the final product. The weight-average molecular weight of the product is 512114, and the PDI is 3.51.

[0065] Comparative Example 1 Weigh out 30g of LA, 30g of BA, 2g of HPA, 3g of MMA, 2g of HEAMP, 0.3g of BPO, and 80g of EA, add them to a three-necked flask, purge with nitrogen, start stirring at 500 rpm, heat to 60℃, and continue the reaction for 3 hours to obtain the final product. The weight-average molecular weight of the product is 134696, and the PDI is 2.11.

[0066] Comparative Example 2 Basically the same as Example 1, except that the amount of monomer added in the two additions to prepare the modified acrylate resin is different, and the temperature at which the monomer is added for the first and second additions is different: 1. Preparation method of modified acrylate resin: (1) Weigh 30g of LA, 30g of BA, 2g of HPA, 3g of MMA, 2g of HEAMP (Formula I-3), 0.3g of BPO, and 80g of EA, add them to a three-necked flask, purge with nitrogen, start stirring, turn the speed to 500rpm, heat to 70℃, and continue the reaction for 3h to obtain the first prepolymer.

[0067] (2) First addition of monomers: Weigh 15g of LA, 15g of BA, 1.5g of HPA, 1.5g of MMA, 1.5g of HEAMP (Formula I-3), 0.15g of BPO, and 40g of EA. Mix them evenly and add them to the above prepolymer by dropping. The dropping time is 1h, the temperature is maintained at 78℃, and the reaction is continued for 2h. The PDI of the second prepolymer should reach 3.0 or higher.

[0068] (3) Second addition of monomers: BPO 0.30g, EA 40g, mixed evenly, added dropwise to the second prepolymer over 1 hour, maintaining the reaction temperature at 78℃, and continuing the reaction for 4 hours to obtain the final product. The weight-average molecular weight of the product was 717812, and the PDI was 5.42.

[0069] Comparative Example 3 Basically the same as Comparative Example 1, except that the modified acrylate resin does not contain unsaturated polyester phosphate esters. The weight-average molecular weight of the product is 228711, and the PDI is 3.03.

[0070] The performance of the tape products made from electro-tack reducing adhesives in each embodiment and comparative example was tested.

[0071] The testing methods include: Determination of weight-average molecular weight: The test was performed using gel permeation chromatography.

[0072] Initial peel strength test: The test was conducted in accordance with the 180° peel strength test method in the national standard GB_T 2792-2014.

[0073] Peel strength test after power-on: The test was conducted in accordance with the 180° peel strength test method in the national standard GB_T 2792-2014.

[0074] Detachment time test: The electro-tack adhesive was applied to the aluminum foil, and the time from when the electro-tack adhesive was energized (driving voltage of 10V) to when the electro-tack adhesive was completely peeled off was recorded with a stopwatch.

[0075] The test results of the tape products made from electro-tack reducing adhesives in each embodiment and comparative example are shown in Table 1.

[0076] Table 1

[0077] Note: Current decay indicates that the cations and anions in the colloid are moving. As the current decreases to 0, it indicates that the ions have completely reached both sides of the colloid layer.

[0078] As shown in Table 1, the PDI of Examples 1-3 was between 2.5 and 5, and the weight-average molecular weight was between 30,000 and 800,000. The initial peel strength and room temperature holding time of the electro-induced anti-tack adhesive were higher than those of Comparative Example 1, and the peel strength after energization was lower than that of Comparative Example 1. In Comparative Example 2, the molecular weight distribution was greater than 5, and the weight-average molecular weight was greater than 300,000. Although the initial peel strength was enhanced, the peel strength decreased rapidly after energization, and the room temperature holding time was also poor. In Comparative Example 3, the initial peel strength was low due to the lack of HEAMP. At the same time, the PDI was relatively low, and the weight-average molecular weight was high. The change in colloid polarity made ion movement difficult, resulting in increased de-adhesion time and poor anti-tack effect.

[0079] In summary, the electro-tack reducing adhesive provided in this application, by controlling the PDI and weight-average molecular weight of the modified acrylate resin and coordinating it with raw materials such as conductive agents, ionic liquids, and curing agents, enables the tape prepared by the electro-tack reducing adhesive to have high peel strength before being energized and to be easily peeled off from the adhered object after being energized.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An electro-tack reducing adhesive, characterized in that, This includes modified acrylate resins, wherein the polymer dispersibility index (PDI) of the modified acrylate resins is 2.5 < PDI < 5.

2. The electro-tack reducer according to claim 1, characterized in that, The weight-average molecular weight of the modified acrylate resin is 300,000 to 800,000.

3. The electro-tack reducer according to claim 1, characterized in that, The modified acrylate resin is a copolymer comprising segments A, B, and C, and has the following structural formula: Where 140≤a≤160, 100≤b≤120, 200≤c≤220; Segment A is a polymer block of a viscous monomer; Segment B is a polymer block of a functional monomer; The C segment is a polymer block of a special copolymer monomer.

4. The electro-tack reducer according to claim 1, characterized in that, The comonomer is an unsaturated polyester phosphate ester; The unsaturated polyester phosphate is selected from at least one of the following compounds: ； and / or The viscous monomer is selected from at least one of methyl acrylate, isooctyl acrylate, lauryl acrylate, isobornyl methacrylate, N-methylpyrrolidone, butyl acrylate, acrylonitrile, styrene, and methyl methacrylate; and / or The functional monomer is selected from at least one of hydroxyethyl acrylate, hydroxypropyl acrylate, diethylaminoethyl methacrylate, glycidyl methacrylate, methacrylic acid, 2-hydroxypropyl acrylate, methacrylamide, and N-hydroxymethylacrylamide.

5. The electro-tack reducer according to claim 1, characterized in that, The electro-tack reducer also includes a conductive agent, an ionic liquid, and a solvent; The conductive agent accounts for 2% to 5% of the mass of the electro-tack reducer, the ionic liquid accounts for 15% to 25% of the mass of the electro-tack reducer, and the solvent accounts for 40% to 60% of the mass of the electro-tack reducer.

6. The electro-tack reducer according to claim 5, characterized in that, The conductive agent is selected from at least one of CeO2, ZnO and TiO2; and / or The ionic liquid comprises anion and cation, wherein the cation includes at least one of imidazolium cations, pyridinium cations, and ammonium cations; the anion is at least one of sulfonylimide, tetrafluoroborate, and dicyandiamide; and / or The solvent is selected from at least one of ethyl acetate, butyl acetate, and propyl acetate.

7. The electro-tack reducer according to claim 6, characterized in that, It also includes additives, which include at least one of curing agents, anti-aging agents, and leveling agents.

8. An electro-tack reducing tape, characterized in that, The electro-tack tape includes an electro-tack layer, which is obtained by curing the electro-tack tape according to any one of claims 1 to 7.

9. The electro-adhesive tape according to claim 8, characterized in that, The peel strength of the electro-tack-reducing layer decreased to below 50gf / 25mm after being transferred with aluminum foil at 10V.

10. The electro-adhesive tape according to claim 8, characterized in that, The thickness of the electro-induced viscosity-reducing layer is 40~60μm.

11. A method for preparing an electro-adhesive tape, characterized in that, Includes the following steps: Provides a release film, an electro-tack reducer as described in any one of claims 1 to 7, and a curing agent; The electro-tack reducer and the curing agent are mixed to obtain a mixture; The mixture is applied to the release film, heat-treated at 100~150℃ for 30~60 minutes, and then molded to obtain the non-stick tape.

12. The method for preparing the electro-adhesive tape according to claim 11, characterized in that, The curing agent is one or more of toluene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, and diphenylmethane diisocyanate.

13. The method for preparing the electro-adhesive tape according to claim 11, characterized in that, The amount of curing agent added is 0.05~0.1% of the weight of the electro-tack reducer.

14. A method for preparing a modified acrylate resin, characterized in that, Includes the following steps: Mix 30-60% viscous monomer, 1-10% functional monomer, 1-5% copolymer special monomer, 0.1-1% initiator, and 40-60% solvent to obtain a reaction solution; A portion of the reaction solution was reacted at 60-80℃ for 0.5-2.5 hours under inert gas protection to obtain a prepolymer solution; The remaining reaction solution is continuously or intermittently added to the prepolymer solution in multiple batches, and the reaction is carried out at 60~80℃ for 3~5 hours under inert gas protection to obtain modified acrylate resin.

15. The method for preparing the modified acrylate resin according to claim 14, characterized in that, The mass percentage of the reaction solution used to form the prepolymer solution in the reaction solution does not exceed 50%.

16. The method for preparing the modified acrylate resin according to claim 14, characterized in that, The initiator is selected from at least one of azobisisobutyronitrile or benzoyl peroxide.

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