Reusable and high-shear-strength electrically conductive, low-viscosity adhesive tape and method for manufacturing it

Abstract

The present invention relates to the technical field of adhesive materials, and more specifically to a reusable and high-shear-strength electrically conductive, low-viscosity adhesive tape and a method for producing it, which is manufactured using acrylate-based or olefin-based monomers, methoxypolyethylene glycol-containing esters, acrylic acids, salts, functional monomers, organic solvents, thickening resins, etc. In the electrically conductive, low-viscosity adhesive tape described in the present invention, most of the electrolyte is chemically bonded to the main adhesive molecular chain, and some of the electrolyte is forcibly dissociated into ether-oxygen bonds in methoxypolyethylene glycol, forming a complex, which is not a simple physical mixing as in the prior art, and therefore effectively avoids the large-scale precipitation of electrolytes when electricity is applied, and is reusable.

Description

Technical Field

[0001] The present invention relates to the technical field of adhesive materials, and specifically to a reusable and high-shear-strength electrically conductive viscosity-reducing adhesive tape and a manufacturing method thereof.

Background Art

[0002] The electrically conductive viscosity-reducing adhesives in the prior art are mainly manufactured by physically blending an adhesive resin, an inert organic solvent, and a salt (or ionic liquid).

[0003] The basic principle of electrically conductive viscosity reduction is as follows. The molten salt alone or the electrolyte composed of the molten salt and the inert solvent moves toward the electrode driven by the electric field. The adhesive layer near the electrode, especially its surface, has a high solubility of the electrolyte, and thus precipitates on the surface of the electrode, destroying the van der Waals force between the conventional adhesive resin and the electrode. In addition, an oxidation-reduction reaction occurs on the electrode for the electrolyte, causing a decrease in viscosity.

[0004] In the prior art, an electrolyte or ionic liquid composed of an inert solvent and a salt is used, which has a good function of electrically conductive viscosity reduction. However, due to its low molecular weight, the plasticizing effect on the adhesive system is too strong, resulting in a decrease in the bulk strength of the adhesive layer and a decrease in the shear force. In addition, it is likely to precipitate after being energized, causing loss of functional substances and poor reversibility.

[0005] Examples include the electrically conductive viscosity-reducing adhesive and the double-sided adhesive tape disclosed in Patent CN115895519A, which are manufactured by physically mixing an adhesive body, a solid conductive salt, and a polar proton-inert solvent. It has problems such as serious precipitation after being energized, contamination of the adherend, difficulty in repeated use, and a large addition amount of the inert solvent and the salt (or ionic liquid), resulting in low shear strength of the adhesive body.

[0006] Furthermore, Nitto Denko Corporation discloses in Patent CN116656256A that it has a good electrolytic devising effect in a short time (30s) with a low applied voltage (10V), however, its initial peeling force is low, only 3.35 N / cm. In Patent CN118043424A, it improves the initial peeling force to 25 N / 25 mm and improves the electrolytic devising effect in high temperature and high humidity environments, but its shear strength and reversibility are not reported. [Overview of the project] [Problems that the invention aims to solve]

[0007] In contrast to the aforementioned drawbacks of the prior art, the present invention provides a reusable and high-shear-strength electrically conductive and low-viscosity adhesive tape and a method for manufacturing it, which can effectively solve the problems of the prior art. [Means for solving the problem]

[0008] To achieve the above objectives, the present invention is realized by the following technical solutions.

[0009] The present invention provides an electrolytically deviscated liquid containing acrylate-based or olefin-based monomers, methoxypolyethylene glycol-containing esters, and functional monomers.

[0010] Furthermore, it further comprises an organic solvent, a thickening resin, an acrylic acid-based solvent, an initiator, and an aqueous solution containing Li or Na ions, preferably the aqueous solution containing Li or Na ions being an aqueous solution of lithium hydroxide or sodium hydroxide.

[0011] Furthermore, the acrylate-based or olefin-based monomer includes one or more of the following: methyl acrylate, methyl methacrylate, ethyl acrylate, butyl acrylate, isooctyl acrylate, decyl acrylate, cyclohexyl acrylate, isobornyl acrylate, acrylonitrile, styrene, vinyl acetate, urethane acrylate oligomer, polyester acrylate oligomer, epoxy polyacrylate oligomer, ethoxyphenoxyacrylate, o-phenylphenoxyethyl acrylate, 2-(p-cumenylphenoxy)-ethyl acrylate, nonylphenol ethoxylate acrylate, and ethylhexyloxyacrylate. The methoxypolyethylene glycol-containing ester system is methoxypolyethylene glycol monoacrylate, and the molecular weight of polyethylene glycol in the methoxypolyethylene glycol monoacrylate is 100 to 2000. The aforementioned acrylic acid system includes at least one or two of methacrylic acid or acrylic acid.

[0012] Furthermore, the functional monomer is an acrylic acid and ester system containing a carboxyl group, a hydroxyl group, an epoxy group, or an amino group. Preferably, the functional monomer includes one or more of the following: acrylic acid, hydroxypropyl acrylate, hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, glycidyl methacrylate, and acrylamide.

[0013] Furthermore, the organic solvent includes one or two of the high-boiling point organic solvents and low-boiling point organic solvents. A high-boiling point solvent is a solvent with a boiling point > 150°C. The high-boiling point organic solvent includes one or more of the following: allyl carbonate, ethylene carbonate, propylene carbonate, vinylene carbonate, γ-butyrolactone, dimethyl sulfone, diphenyl sulfone, and sulfolane.

[0014] A low-boiling point solvent is a solvent with a boiling point of ≤50°C. The low-boiling point organic solvent includes one or more of the following: toluene, benzene, xylene, pentane, hexane, octane, heptane, cyclohexane, acetone, methyl ethyl ketone, methyl isobutyl ketone, methanol, ethanol, isopropanol, diethyl ether, propylene oxide, methyl acetate, ethyl acetate, propyl acetate, and butyl acetate.

[0015] Furthermore, it further contains salts, the salts comprising one or more of the following: lithium tetrafluoroborate (LiBF4), lithium bistrifluoromethanesulfonyl azanide (LiTFSI), lithium perchlorate (LiClO4), lithium hexafluoride arsenate (LiAsF6), lithium hexafluoride phosphate (LiPF6), lithium trifluoromethylsulfonate (LiCF3SO3), lithium bis(trifluoromethylsulfonyl)imide (LiN(CF3SO2)2), lithium bisoxalatoborate (LiBOB), sodium perchlorate, sodium tetrafluoroborate, sodium thiocyanate, sodium hexafluoride phosphate (NaPF6), sodium bis(trifluoromethylsulfonyl)imide (NaTFSI), sodium trifluoromethylsulfonate (NaCF3SO3). The aforementioned thickening resin includes one or more of the following: maleated rosin, terpene resin, terpene phenol resin, hydrogenated rosin, rosin glycerin ester, C5 petroleum resin, and C7 petroleum resin. The initiator includes one or more of the following: lauroyl peroxide, dibenzoyl peroxide, t-butyl peroxypivalate, cumene hydroperoxide, azobisisobutyronitrile, and azobisisoheptanenitrile.

[0016] Furthermore, the solution contains, by weight, 30 to 75 parts acrylate or olefin monomer, 10 to 30 parts methoxypolyethylene glycol monoacrylate, 2 to 20 parts acrylic acid, 2 to 15 parts high-boiling organic solvent, 2 to 15 parts salt, 2 to 10 parts acrylic acid and ester functional monomer, 50 to 100 parts low-boiling organic solvent, 0.1 to 10 parts thickening resin, 0.1 to 1.5 parts initiator, and 1 to 5 parts aqueous solution containing Li or Na ions.

[0017] Preferably, the mixture contains, by weight, 60 to 70 parts by weight of an acrylate or olefin monomer, 12 to 18 parts by weight of methoxypolyethylene glycol monoacrylate, 2 to 8 parts by weight of an acrylic acid, 2 to 8 parts by weight of a high-boiling point organic solvent, 2 to 8 parts by weight of a salt, 2 to 8 parts by weight of an acrylic acid and ester functional monomer, 80 to 100 parts by weight of a low-boiling point organic solvent, 0.1 to 8 parts by weight of a thickening resin, 0.1 to 0.5 parts by weight of an initiator, and 1 to 5 parts by weight of an aqueous solution containing Li or Na ions. Of these, the aqueous solution containing Li or Na ions is an aqueous solution of lithium hydroxide or sodium hydroxide with a concentration of 40 to 60%, and preferably, the aqueous solution containing Li or Na ions is an aqueous solution of lithium hydroxide or sodium hydroxide with a concentration of 50%.

[0018] Preferably, the solution comprises, by weight, 65 parts by weight of an acrylate or olefin monomer, 15 parts by weight of methoxypolyethylene glycol monoacrylate, 5 parts by weight of an acrylic acid, 5 parts by weight of a high-boiling organic solvent, 5 parts by weight of a salt, 5 parts by weight of an acrylic acid and ester-based functional monomer, 100 parts by weight of a low-boiling organic solvent, 5 parts by weight of a thickening resin, 0.3 parts by weight of an initiator, and 2 parts by weight of an aqueous solution containing Li or Na ions.

[0019] This is an electrically conductive, viscosity-reducing adhesive, manufactured by adding a crosslinking agent to the above-mentioned electrically conductive, viscosity-reducing liquid.

[0020] Furthermore, the process includes adding a catalyst to the electrolyzed viscosity-reducing solution. Here, the crosslinking agent includes one or more of diphenylmethane diisocyanate (MDI), hexamethylene diisocyanate (HDI), toluene diisocyanate (TDI), isophorone diisocyanate (IPDI), dicyclohexylmethane diisocyanate (HMDI), lysine diisocyanate (LDI), an adduct of TDI and trimethylolpropane, an IPDI trimer, a burette polyisocyanate, an HDI trimer, a trifunctional aziridine, ethylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, trimethylolpropane triglycidyl ether, isophoronediamine, m-phenylenediamine, 2-ethyl-4-methylimidazole, The catalyst includes one or more of stannous octoate, dibutyltin dilaurate, triethylenediamine, triethylamine, N,N-dimethylbenzylamine, N,N-dimethylhexadecylamine, N,N-dimethylbutylamine.

[0021] Preferably, 0.1 to 0.5 parts of the crosslinking agent and 0.01 to 0.05 parts of the catalyst are added per 100 parts of the synthesized current-conducting viscosity-reducing adhesive. Preferably, 0.3 parts of the crosslinking agent and 0.02 parts of the catalyst are added per 100 parts of the synthesized current-conducting viscosity-reducing adhesive.

[0022] A current-conducting viscosity-reducing adhesive tape, which is manufactured by the above current-conducting viscosity-reducing adhesive. Preferably, the current-conducting viscosity-reducing adhesive is applied to a release film I, dried, and then laminated with a release film II, followed by winding and aging to complete. Preferably, the materials of the release films I and II are polyethylene (PE), polypropylene (PP), or polyethylene terephthalate (PET).

[0023] Preferably, the difference value of the release force between the release film I and the release film II is ≧5 gf / 25 mm.

[0024] A manufacturing method of the current-conducting viscosity-reducing adhesive tape, and its manufacturing steps are as follows: In the synthesis of the current-conducting viscosity-reducing fluid, an acrylate-based or olefin-based monomer, an ester-based monomer containing methoxypolyethylene glycol, an acrylic acid-based monomer, a salt, a functional monomer, an organic solvent, and a thickening resin are added to a reaction kettle, stirred uniformly, and nitrogen gas is passed through to discharge oxygen in the reaction kettle and the materials. The temperature is raised while stirring. When the material temperature in the reaction kettle rises to 50-70°C, a part of the initiator is added. Subsequently, after the temperature is raised to 70-80°C, the reaction is started to be timed and reacted for 3-6 hours. Subsequently, the remaining initiator is added and the reaction continues for 1-3 hours. Then, it is cooled to 35-45°C, an aqueous solution containing 50% concentration of Li or Na ions is added, stirred for 10-30 minutes, and the material is discharged for use, which is step S1; In the preparation of the current-conducting viscosity-reducing adhesive, a crosslinking agent and a catalyst are added to the current-conducting viscosity-reducing fluid synthesized in step S1, stirred uniformly, and stored at 20-30°C or below for use, which is step S2; In the production of the current-conducting viscosity-reducing adhesive tape, the prepared current-conducting viscosity-reducing adhesive is applied to a release film I, baked in an oven at 70-90°C for 1-4 minutes, then laminated with a release film II, and aged at 30-50°C for 24-72 hours to obtain a current-conducting viscosity-reducing adhesive tape protected by double-sided release films, which is step S3.

[0025] Preferably, it is a method for producing a current-conducting viscosity-reducing adhesive tape, and its production steps are as follows: In the synthesis of electrolytic deviscated liquid, 30 to 75 parts of a general acrylate or olefin monomer, 10 to 30 parts of methoxypolyethylene glycol monoacrylate, 2 to 20 parts of (meth)acrylic acid, 2 to 15 parts of a high-boiling organic solvent, 2 to 15 parts of a salt, 2 to 10 parts of acrylic acid and ester functional monomers containing a carboxyl group, or a hydroxyl group, or an epoxy group, or an amine group, 50 to 100 parts of a low-boiling organic solvent, and 0.1 to 10 parts of a thickening resin are added to a reaction vessel, stirred uniformly, oxygen is removed from the reaction vessel and materials by flowing in an oxygen-free inert gas, a constant pressure is maintained, and the temperature is increased while stirring. When the material temperature in the reaction vessel rises to 60°C, 0.1 to 1 part of an initiator is added, and the temperature is then increased to 75°C to 80°C, after which the reaction is timed, and the reaction is carried out for 4 to 5 hours, after which 0.05 to 0.5 parts of an initiator is added and the reaction is continued for 2 hours. After lowering the temperature to 35°C to 45°C, add 1 to 5 parts of a 50% concentration lithium hydroxide or sodium hydroxide aqueous solution and stir for 20 minutes. Discharge the material and prepare it for use. The viscosity of the material is 400 to 20000 cps in step S1. In the preparation of the electrostatically devisible adhesive, step S2 involves adding 0.2 to 20 parts of crosslinking agent and 0.05 to 0.2 parts of catalyst to 100 parts of the synthesized electrostatically devisible electrolyte precursor solution, stirring uniformly, and storing at 25°C or below for 1 to 6 hours to prepare for use. The manufacturing of an electrically conductive, low-viscosity adhesive tape includes step S3, in which a prepared electrically conductive, low-viscosity electrolyte is applied to a release film I of 5 to 100 μm thickness, baked in an oven at 50°C to 90°C for 0.5 to 2 minutes, then compounded with a release film II of 5 to 100 μm thickness, subsequently wound up, and aged at 30°C to 50°C for 24 to 72 hours to obtain an electrically conductive, low-viscosity adhesive tape protected by double-sided release films, the electrolyte film sheet thickness being 10 to 200 μm, and the structure as shown in Figure 1.

[0026] This invention polymerizes methoxypolyethylene glycol, which has the ability to dissolve in salts, into adhesive molecular chains, thereby not only providing the ability to promote the transfer of salts with voltage, but also avoiding defects where high-boiling point solvents tend to precipitate. Furthermore, since it polymerizes into molecular chains itself and adds low molecular weight substances within, it does not cause a decrease in the mechanical performance of the adhesive. [Effects of the Invention]

[0027] The technical solutions provided by the present invention have the following beneficial effects compared to known prior art.

[0028] In the electrically conductive, viscosity-reducing adhesive of the embodiment of the present invention, the majority of the electrolyte is chemically bonded to the main adhesive molecular chain, and a portion of the electrolyte is forcibly dissociated into ether-oxygen bonds in methoxypolyethylene glycol, forming a complex. This is not a simple physical mixing as in the prior art, and therefore effectively avoids the large-scale precipitation of electrolyte when an electric current is applied, and allows for repeated use. Furthermore, the strength of the adhesive body is improved, exhibiting high shear strength. [Brief explanation of the drawing]

[0029] To more clearly illustrate embodiments of the present invention or technical solutions in the prior art, the following briefly introduces the drawings that may be used in describing the embodiments or the prior art. Clearly, the drawings in the following description are merely some embodiments of the present invention, and those skilled in the art can obtain further drawings based on these without any creative work. [Figure 1] This figure shows the structure of the electrically conductive, adhesive tape of the present invention. [Modes for carrying out the invention]

[0030] To further clarify the object, technical solution, and advantages of the embodiments of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments. Clearly, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art without creative work based on the embodiments of the present invention are all within the scope of the protection of the present invention.

[0031] The present invention will be further described below with reference to examples.

[0032] (1) Regarding the manufacture of adhesive tapes Example 1 Step A was the synthesis of an electrolytic deviscosity solution. Add 30 parts isooctyl acrylate, 20 parts butyl acrylate, 15 parts methyl methacrylate, 15 parts methoxypolyethylene glycol (600) monoacrylate, 5 parts acrylic acid, 5 parts allyl carbonate, 5 parts lithium hexafluoride phosphate, 5 parts hydroxyethyl acrylate, 5 parts rosin glycerin ester, and 100 parts ethyl acetate to the reaction vessel, stir uniformly, circulate nitrogen gas to remove oxygen from the reaction vessel and materials, maintain a constant pressure, and raise the temperature while stirring. When the material temperature in the reaction vessel reaches 60°C, add 0.2 parts dibenzoyl peroxide, then raise the temperature to 75°C and start timing the reaction. React for 4 hours, then add 0.1 parts dibenzoyl peroxide and continue reacting for 2 hours. Cool to 35°C-45°C, add 2 parts 50% aqueous lithium hydroxide solution, stir for 20 minutes, and drain the material for use. The viscosity of the material is 4000-10000 cps. Step B was the preparation of the electrolytically devisible adhesive. 100 parts of the synthesized electrolytically devisible solution were mixed with 0.3 parts of HDI trimer and 0.02 parts of dibutyltin dilaurate, stirred uniformly, and stored at 25°C or below for use. Step C was the manufacture of an electrostatically devisible adhesive tape. The prepared electrostatically devisible adhesive was applied to a 50 μm thick release film I, baked in an 80°C oven for 3 minutes, then compounded with a 25 μm thick release film II, and aged at 40°C for 48 hours to obtain an electrostatically devisible adhesive tape protected by double-sided release films. The electrolyte film sheet was 50 μm thick, and the structure was as shown in Figure 1.

[0033] Example 2 Step A was the synthesis of an electrolytic deviscated liquid. 20 parts isooctyl acrylate, 30 parts butyl acrylate, 10 parts styrene, 20 parts methoxypolyethylene glycol (1000) monoacrylate, 5 parts acrylic acid, 5 parts allyl carbonate, 5 parts lithium hexafluoride phosphate, 5 parts hydroxyethyl methacrylate, 5 parts terpene resin, and 100 parts ethyl acetate were added to the reaction vessel and stirred uniformly. Nitrogen gas was flowed to remove oxygen from the reaction vessel and materials. Maintaining a constant pressure, the temperature was increased while stirring. When the material temperature in the reaction vessel reached 60°C, 0.2 parts dibenzoyl peroxide was added, and the temperature was subsequently raised to 75°C. The reaction was timed for 4 hours, then 0.1 parts dibenzoyl peroxide was added and the reaction continued for 2 hours. The mixture was cooled to 35°C-45°C, the material was discharged, and prepared for use. The viscosity of the material was 4000-10000 cps. Step B was the preparation of the electrolytically devisible adhesive. 0.4 parts of trifunctional aziridine were added to 100 parts of the synthesized electrolytically devisible solution, and the mixture was stored at a temperature below 25°C in preparation for use. Step C was the same as Step C in Example 1.

[0034] Example 3 Step A is the same as Step A of Example 1, except that 5 parts glycidyl methacrylate is used instead of 5 parts hydroxyethyl acrylate. Step B was the preparation of the electrolytically devisible adhesive. 100 parts of the synthesized electrolytically devisible solution were mixed with 0.3 parts of isophorone diamine, stirred uniformly, and stored at 25°C or below, ready for use. Step C was the same as Step C in Example 1.

[0035] Example 4 Step A is the same as Step A of Example 1, except that 5 parts sodium hexafluoride phosphate is used instead of 5 parts lithium hexafluoride phosphate. Step B is the same as Step B in Example 1. Step C was the same as Step C in Example 1.

[0036] Comparative Example 1 To 100 parts of Sekibai Chemical PS-8281E2 solvent-type acrylate pressure-sensitive adhesive (solid content 49%), 20 parts lithium hexafluoride phosphate, 20 parts allyl carbonate, 10 parts Sekibai Chemical PX2300A curing agent, 10 parts terpene resin, 50 parts ethyl acetate, and 50 parts toluene were added and the mixture was uniformly stirred and dispersed. Subsequently, an electrolytic film sheet thickness of 50 μm was produced according to step C of Example 1 to manufacture an electrolytic film sheet with reduced viscosity.

[0037] Comparative Example 2 Step A was the same as Step A of Example 1, but without adding 15 parts of methoxypolyethylene glycol (600) monoacrylate. Step B is the same as Step B in Example 1. Step C was the same as Step C in Example 1.

[0038] Comparative Example 3 Step A was the same as Step A of Example 1, but without adding 5 parts hydroxyethyl acrylate. Step B was the same as Step B of Example 1, but without adding 0.3 parts of HDI trimer and 0.02 parts of dibutyltin dilaurate. Step C was the same as Step C in Example 1.

[0039] Comparative Example 4 Step A was the same as Step A of Example 1, but without adding 5 parts acrylic acid. Step B is the same as Step B in Example 1. Step C was the same as Step C in Example 1.

[0040] Comparative Example 5 Step A was the same as Step A of Example 1, but without adding 5 parts allyl carbonate. Step B is the same as Step B in Example 1. Step C was the same as Step C in Example 1.

[0041] (ii) Performance Test The following performance tests were performed on the electrically conductive adhesive tapes obtained in Examples 1, 2, 3, and 4, and Comparative Examples 1, 2, 3, 4, and 5.

[0042] (1) In the surface resistance test (GB / T 1410-2006), the release film on one side of the manufactured adhesive tape was peeled off, and the surface resistance of the corresponding adhesive surface was tested.

[0043] (2) In the 180° peel force test (GB / T2792-2014), [1] the test was performed before energization. After peeling off the release film from one side of the manufactured adhesive tape, it was attached to a steel plate, pressed back and forth three times with a 2kg rubber roller, and left at 23°C for 24 hours before being tested and recorded as F1. [2] The peel force was tested after energization. The release film from one side of the adhesive tape was peeled off and it was attached to aluminum foil, and pressed back and forth three times with a 2kg rubber roller. Subsequently, the release film from the other side of the adhesive tape was peeled off and it was attached to a steel plate, pressed back and forth three times with a 2kg rubber roller, and left at 23°C for 24 hours. After that, the positive electrode of a DC power supply was connected to the aluminum foil and the negative electrode to the steel plate, and the attached sample was subjected to an energization treatment of 30V * 30 seconds, followed by a 180° peel force test and recorded as F2.

[0044] (3) In the shear strength test (GB / T 7124-2008), the electro-deposition adhesive tape was attached to an aluminum plate substrate after peeling off the release film, and then attached to another aluminum sheet after peeling off the release film from the other side. The bonded area was 12.5 x 25 mm, and the shear force was tested after it had been left for 20 minutes.

[0045] (4) In the peel force reversibility test, the sample that underwent the 180° peel force test after energization was reattached to a new steel plate, pressed back and forth three times with a 2kg rubber roller, left at 23°C for 24 hours, and then the peel force was tested. The re-bonding peel force was recorded as F3, and the recovery ratio W = F3 / F1 * 100%.

[0046] (5) In the steel plate surface residue test after electric peeling, the degree of contamination on the steel plate surface after electric peeling, and the presence or absence of oil stains or adhesive residue were observed.

[0047] [Table 1] JPEG2026521226000003.jpg152170

[0048] By testing the examples and comparative examples, the comparative data in Table 1 can be obtained. As can be seen from the data in Table 1, the adhesive tape produced in Example 1 has high shear strength and better peel force recovery ability after electrical current is applied. The peel force recovery ability of the reduced-viscosity adhesive tapes in the comparative examples was relatively poor in all cases, and in particular, the reduced-viscosity adhesive tapes produced without methoxypolyethylene glycol (600) monoacrylate or functional monomers and crosslinking agents as reaction raw materials all had a peel force recovery ratio of less than 70%.

[0049] Furthermore, as shown in Examples 1-3, electrically conductive adhesive tapes manufactured using lithium salts in the electrically conductive viscosity-reducing solution can be re-bonded after energizing, and their peel strength recovery ratio can reach more than 95%. Similarly, as shown in Example 4, electrically conductive adhesive tapes manufactured using sodium salts in the electrically conductive viscosity-reducing solution can be re-bonded after energizing, and their peel strength recovery ratio can reach 84%.

[0050] In the electrically conductive, viscosity-reducing adhesive of the embodiment of the present invention, the majority of the electrolyte is chemically bonded to the main adhesive molecular chain, and a portion of the electrolyte is forcibly dissociated into ether-oxygen bonds in methoxypolyethylene glycol, forming a complex. This is not a simple physical mixing as in the prior art, and therefore effectively avoids the large-scale precipitation of electrolyte when an electric current is applied, and allows for repeated use. Furthermore, the strength of the adhesive body is improved, exhibiting high shear strength.

[0051] The above embodiments are merely for illustrating, and not limiting, the technical solutions of the present invention. Although the present invention has been described in detail with reference to the embodiments described above, as will be understood by those skilled in the art, it is still possible to modify the technical solutions described in each of the above embodiments or to make equivalent substitutions for some of the technical features thereof, and such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the scope of protection of the technical solutions of each embodiment of the present invention. [Explanation of symbols]

[0052] 1-Release film I, 2-Adhesive layer, 3-Release film II.

Claims

1. An electrolytic deviscated liquid characterized by containing acrylate-based or olefin-based monomers, methoxypolyethylene glycol-containing esters, and functional monomers.

2. The electrolytic deviscating liquid according to claim 1, further comprising an organic solvent, a thickening resin, an acrylic acid-based solvent, an initiator, and an aqueous solution containing Li or Na ions, preferably wherein the aqueous solution containing Li or Na ions is an aqueous solution of lithium hydroxide or sodium hydroxide.

3. The acrylate-based or olefin-based monomer includes one or more of the following: methyl acrylate, methyl methacrylate, ethyl acrylate, butyl acrylate, isooctyl acrylate, decyl acrylate, cyclohexyl acrylate, isobornyl acrylate, acrylonitrile, styrene, vinyl acetate, urethane acrylate oligomer, polyester acrylate oligomer, epoxy polyacrylate oligomer, ethoxyphenoxyacrylate, o-phenylphenoxyethyl acrylate, 2-(p-cumenylphenoxy)-ethyl acrylate, nonylphenol ethoxylate acrylate, and ethylhexyloxyacrylate. The methoxypolyethylene glycol-containing ester system is methoxypolyethylene glycol monoacrylate, and the molecular weight of polyethylene glycol in the methoxypolyethylene glycol monoacrylate is 100 to 2000. The electrolytic viscosity-reducing liquid according to claim 2, characterized in that it contains at least one or two of methacrylic acid or acrylic acid.

4. The functional monomers are acrylic acids and ester systems containing carboxyl groups, hydroxyl groups, epoxy groups, or amino groups. Preferably, the electrolytic deviscating liquid according to claim 1, characterized in that the functional monomer comprises one or more of acrylic acid, hydroxypropyl acrylate, hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, glycidyl methacrylate, and acrylamide.

5. The aforementioned organic solvent includes one or two of the following: a high-boiling point organic solvent and a low-boiling point organic solvent. The aforementioned high-boiling point organic solvent includes one or more of allyl carbonate, ethylene carbonate, propylene carbonate, vinylene carbonate, γ-butyrolactone, dimethyl sulfone, diphenyl sulfone, and sulfolane. The electrolytic deviscating liquid according to claim 2, characterized in that the low boiling point organic solvent contains one or more of the following: toluene, benzene, xylene, pentane, hexane, octane, heptane, cyclohexane, acetone, methyl ethyl ketone, methyl isobutyl ketone, methanol, ethanol, isopropanol, diethyl ether, propylene oxide, methyl acetate, ethyl acetate, propyl acetate, and butyl acetate.

6. further contains a salt, which further contains a salt, and the salt is lithium tetrafluoroborate (LiBF ２ ), lithium bistrifluoromethanesulfonylazanide (LiTFSI), lithium perchlorate (LiClO ４ ), lithium hexafluoroarsenate (LiAsF ６ ), lithium hexafluorophosphate (LiPF ６ ), lithium trifluoromethylsulfonate (LiCF ３ SO ３ ), lithium bis(trifluoromethylsulfonyl)imide (LiN(CF ３ SO ２ )) ２ ), lithium bisoxalatoborate (LiBOB), sodium perchlorate, sodium tetrafluoroborate, sodium thiocyanate, sodium hexafluorophosphate (NaPF ６ ), sodium bis(trifluoromethylsulfonyl)imide (NaTFSI), sodium trifluoromethylsulfonate (NaCF ３ SO ３ ), and contains one or several of them, The aforementioned thickening resin includes one or more of the following: maleated rosin, terpene resin, terpene phenol resin, hydrogenated rosin, rosin glycerin ester, C5 petroleum resin, and C7 petroleum resin. The electrolytic deviscating liquid according to claim 5, characterized in that the initiator comprises one or more of lauroyl peroxide, dibenzoyl peroxide, t-butyl peroxypivalate, cumene hydroperoxide, azobisisobutyronitrile, and azobisisoheptanenitrile.

7. The electrolytic deviscating liquid according to claim 6, characterized by comprising, by weight, 30 to 75 parts by weight of an acrylate-based or olefin-based monomer, 10 to 30 parts by weight of methoxypolyethylene glycol monoacrylate, 2 to 20 parts by weight of an acrylic acid-based monomer, 2 to 15 parts by weight of a high-boiling point organic solvent, 2 to 15 parts by weight of a salt, 2 to 10 parts by weight of an acrylic acid and ester-based functional monomer, 50 to 100 parts by weight of a low-boiling point organic solvent, 0.1 to 10 parts by weight of a thickening resin, 0.1 to 1.5 parts by weight of an initiator, and 1 to 5 parts by weight of an aqueous solution containing Li or Na ions.

8. An electrostatically conductive adhesive characterized by being manufactured by adding a crosslinking agent to the electrostatically conductive viscosity-reducing liquid described in any one of claims 1 to 7 above.

9. Furthermore, the process includes adding a catalyst to the electrolyzed viscosity-reducing solution. Here, the crosslinking agent includes one or more of the following: diphenylmethane diisocyanate (MDI), hexamethylene diisocyanate (HDI), toluene diisocyanate (TDI), isophorone diisocyanate (IPDI), dicyclohexylmethane diisocyanate (HMDI), lysine diisocyanate (LDI), adducts of TDI and trimethylolpropane, IPDI trimers, burette polyisocyanate, HDI trimers, trifunctional aziridine, ethylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, trimethylolpropane triglycidyl ether, isophoronediamine, m-phenylenediamine, and 2-ethyl-4-methylimidazole. The electrostatically conductive, viscosity-reducing adhesive according to claim 8, characterized in that the catalyst comprises one or more of the following: stannous octanoate, dibutyltin dilaurate, triethylenediamine, triethylamine, N,N-dimethylbenzylamine, N,N-dimethylhexadecylamine, and N,N-dimethylbutylamine.

10. An electrically conductive, viscosity-reducing adhesive tape manufactured using the electrically conductive, viscosity-reducing adhesive described in claim 9, preferably comprising applying the electrically conductive, viscosity-reducing adhesive to a release film I, compounding it with a release film II after drying, then winding and aging to complete the process, wherein the materials of the release films I and II are preferably polyethylene (PE), polypropylene (PP), or polyethylene terephthalate (PET).

11. The manufacturing steps are: In the synthesis of electrolytically deviscated liquid, step S1 involves adding acrylate-based or olefin-based monomers, methoxypolyethylene glycol-containing esters, acrylic acids, salts, functional monomers, organic solvents, and thickening resins to a reaction vessel, stirring uniformly, discharging oxygen from the reaction vessel and materials by flowing nitrogen gas, raising the temperature while stirring, adding a portion of the initiator when the material temperature in the reaction vessel reaches 50-70°C, then raising the temperature to 70-80°C and starting the reaction timer, reacting for 3-6 hours, then adding the remaining initiator and continuing the reaction for 1-3 hours, cooling to 35-45°C, adding a 50% concentration aqueous solution containing Li or Na ions, stirring for 10-30 minutes, and discharging the materials to prepare for use. In the preparation of an electrostatically conductive viscosity-reducing adhesive, step S2 involves adding a crosslinking agent and a catalyst to the electrostatically conductive viscosity-reducing liquid synthesized in step S1, stirring uniformly, and storing it at 20-30°C or below for use. A method for manufacturing an electrically conductive adhesive tape according to claim 10, comprising step S3: applying a prepared electrically conductive adhesive to a release film I, baking it in an oven at 70 to 90°C for 1 to 4 minutes, compounding it with a release film II, and aging it at 30 to 50°C for 24 to 72 hours to obtain an electrically conductive adhesive tape protected by double-sided release films.

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