Electrically peelable composition, preparation method, and adhesive article

Abstract

The present application relates to the field of chemical materials and provides an electrically peelable composition, a preparation method, and an adhesive article. The electrically peelable composition provided by the present application comprises the following components: an acrylate polymer, an ionic liquid, auxiliary agent A, and auxiliary agent B, wherein the auxiliary agent A accounts for 10%-30% of the total weight of the acrylate polymer, the mass ratio of the auxiliary agent A to the auxiliary agent B is (10-30):(1-10), and the auxiliary agent A and the auxiliary agent B are used for performing a synergistic crosslinking reaction with the acrylate polymer. In the present application, by means of the optimized design of the components in the electrically peelable composition, an adhesive article prepared from the electrically peelable composition exhibits significantly improved adhesion holding force, and both the electrical peelability and the adhesion property of the adhesive article can also be effectively achieved.

Description

An electrostrippable composition, a preparation method and an adhesive article TECHNICAL FIELD

[0001] The present application belongs to the field of chemical materials, and particularly relates to an electrostrippable composition, a preparation method and an adhesive article. BACKGROUND

[0002] In the process of manufacturing electronic components, in order to improve the reworkability of the yield rate and meet the recycling and reuse after recycling, it is necessary to provide an adhesive article with high adhesive performance and easy stripping; after the adhesive article is attached to the adherend, it should have strong adhesive force, and it is easy to remove from the adherend when stripping, so as to guarantee the recycling utilization of the adherend.

[0003] The adhesive article in the prior art is often made of an electrostrippable composition, and when stripping, a voltage is applied to reduce the adhesive force of the adhesive article, so that it is stripped from the adherend; however, the adhesive article made of the electrostrippable composition has the defect of poor cohesion due to the inhibition of raw material components, resulting in poor adhesive retention of the adhesive article, which cannot effectively balance the easy stripping and adhesive performance.

[0004] Therefore, the present application is proposed. SUMMARY

[0005] The present application provides an electrostrippable composition, a preparation method and an adhesive article, and aims to solve the problem of poor adhesive retention of the adhesive article in the prior art, which cannot effectively balance the easy stripping and adhesive performance.

[0006] The first aspect of the present application provides an electrostrippable composition, which comprises the following components: an acrylate polymer, an ionic liquid, an additive A and an additive B; the additive A accounts for 10% to 30% of the total weight of the acrylate polymer; the mass ratio of the additive A to the additive B is (10-30):(1-10); wherein the additive A and the additive B are used for synergistic crosslinking reaction with the acrylate polymer.

[0007] The present application optimizes the design of the raw material components of the electrostrippable composition, and uses an acrylate polymer, an ionic liquid, an additive A and an additive B as the main raw materials; wherein the acrylate polymer can endow the electrostrippable composition with adhesive property, and the ionic liquid can make the adhesive layer formed by the electrostrippable composition have the characteristics of easy stripping under electricity; the additive A can crosslink with the acrylate polymer, so as to make the adhesive layer formed by the electrostrippable composition have high stripping strength before being electrified, so that it is not easy to be stripped from the adherend; the additive B can crosslink with the acrylate polymer to solidify into a film, so as to facilitate the formation of the adhesive layer by the electrostrippable composition.

[0008] Particularly, the weight ratio of the auxiliary A to the auxiliary B is (10-30):(1-10), and within the weight range, the auxiliary A, the auxiliary B and the acrylate polymer can synergistically cross-link, so that the electrically peelable composition has a suitable cross-linking density, the cohesion of the electrically peelable composition is significantly improved, and the adhesion retention of the adhesive layer formed by the electrically peelable composition is greatly improved, so that the electrically peelable composition can effectively balance the easy peelability and the adhesion performance.

[0009] Therefore, the electrically peelable composition provided by the application can significantly improve the cohesion strength of the electrically peelable composition through the synergistic combination of the acrylate polymer, the ionic liquid, the auxiliary A and the auxiliary B, and the adhesive layer formed by the electrically peelable composition has a high peel strength and adhesion retention before being electrified, and is easy to peel off from the adherend after being electrified, so that the adhesive product made of the electrically peelable composition can have the easy peelability and excellent adhesion performance.

[0010] In some embodiments, the electrically peelable composition satisfies at least one of the following conditions A-H:

[0011] A. With respect to 100 parts of the acrylate polymer, the ionic liquid is 2-30 parts, the auxiliary A is 10-30 parts, and the auxiliary B is 1-10 parts in the components of the electrically peelable composition by weight;

[0012] B. The auxiliary A includes a linear active functional group-containing resin, and the molecular weight thereof is 200-1000.

[0013] C. The auxiliary B includes a UV-curable resin and / or a non-UV-curable resin;

[0014] D. The anion of the ionic liquid is a bis(fluorosulfonyl)imide anion.

[0015] E. The cation of the ionic liquid includes at least one of a nitrogen-containing onium cation, a sulfur-containing onium cation, a phosphorus-containing onium cation, an imidazolium onium cation, an ammonium cation or a pyridinium onium cation;

[0016] F. The solid content of the acrylate polymer is 10-50%.

[0017] G. The weight average molecular weight of the acrylate polymer is more than 100,000 and less than 5,000,000, preferably more than 200,000 and less than 4,000,000, and more preferably more than 300,000 and less than 3,000,000.

[0018] H. The glass transition temperature of the acrylate polymer is less than 0°C, preferably less than -20°C, and more preferably less than -40°C.

[0019] In some embodiments, the auxiliary A includes at least one of a rosin carboxyl-containing tackifying resin, an epoxy-containing epoxy-containing tackifying resin, a phenol hydroxyl-containing tackifying resin, an acrylate tackifying resin, and a resin represented by Formula I, Formula II, and Formula III below,

[0020] wherein R1 represents a phenyl group, a cyclohexyl group, or a methylene group, R2 represents a methyl group, a hydroxyl group, a vinyl group, a carboxyl group, an epoxy group, a mercapto group, or an acryloyloxy group, and R represents a methyl group, a hydroxyl group, a vinyl group, a carboxyl group, an epoxy group, a mercapto group, or an acryloyloxy group. In some embodiments, when the auxiliary B is a non-UV curable resin, the auxiliary B includes at least one of an isocyanate crosslinking agent, an epoxy crosslinking agent, an aziridine crosslinking agent, or a metal chelate crosslinking agent; or when the auxiliary B is a UV curable resin, the auxiliary B includes at least one of an epoxy acrylate, a polyurethane acrylate, or a polyester acrylate.

[0021] In some embodiments, the acrylate-based polymer is prepared using a main unit, a functional unit, and an initiator as main raw materials; wherein the main unit is an alkyl (meth)acrylate containing an alkyl group having 1-14 carbon atoms; the functional unit includes a carboxyl-containing acrylate monomer and / or a hydroxyl-containing acrylate monomer; and the initiator includes any one of a polymerization thermal initiator and a polymerization photoinitiator.

[0022] In some embodiments, the acrylate-based polymer satisfies one or more of the following conditions I-M:

[0023] I. When the initiator is a polymerization thermal initiator, the mass ratio of the main unit to the functional unit is (70-95):(5-30);

[0024] J. When the initiator is a polymerization photoinitiator, the raw materials of the acrylate-based polymer further include a multifunctional UV monomer; and the mass ratio of the main unit, the functional unit, and the multifunctional UV monomer is (60-95):(3-30):(2-10), preferably (60-85):(10-30):(5-10);

[0025] K. The raw materials of the acrylate-based polymer further include a polymerization solvent, and the polymerization solvent includes at least one of an aliphatic hydrocarbon, an ester compound, and an aromatic hydrocarbon;

[0026] L, the polymerization thermal initiator includes any one of azo polymerization initiator 2,2'-azobis isobutyronitrile, 2,2'-azobis (2-methylpropyl amidine) disulfide, 2,2'-azobis (4-methoxy-2,4-dimethyl pentyl nitrile), 2,2'-azobis (2,4-dimethyl pentyl nitrile), 2,2'-azobis (2-methyl butyronitrile), 1,1'-azobis (cyclohexane-1-methyl nitrile), 2,2'-azobis (2,4,4-trimethyl pentane), dimethyl-2,2'-azobis (2-methyl propionic acid ester), 2,2'-azobis [2-methyl-N- (phenyl methyl)-propyl amidine] dihydrochloride, 2,2'-azobis [2- (3,4,5,6-tetrahydro pyrimidine-2-yl) propane] dihydrochloride or 2,2'-azobis [2- (2-imidazoline-2-yl) propane] or any one of potassium persulfate or ammonium persulfate;

[0027] M, the polymerization photoinitiator includes any one of type I photoinitiator hydroxypropionophenone, alkylaminoacetophenone, benzoin ether or phosphine oxide, or any one of type II initiator benzophenone, substituted benzophenone, anthraquinone, benzoyl formate, camphorquinone or thioxanthone.

[0028] The second aspect of the application provides a preparation method of an electrical stripping composition, comprising:

[0029] The acrylate polymer preparation step: the main unit, the functional unit and the polymerization solvent are mixed and reacted with the polymerization thermal initiator at a predetermined ratio to obtain acrylate polymer A; or the main unit, the functional unit, the multifunctional UV monomer and the polymerization solvent are mixed and reacted with the polymerization photoinitiator at a predetermined ratio to obtain acrylate polymer B.

[0030] The electrical stripping composition preparation step: the acrylate polymer A or the acrylate polymer B is mixed and reacted with the remaining components at a predetermined ratio to obtain the electrical stripping composition.

[0031] In some embodiments, the acrylate polymer preparation step specifically comprises:

[0032] The monomer mixture A composed of the main unit and the functional unit is mixed with the polymerization solvent at a mass ratio of 1: (1-9), and the polymerization thermal initiator is added at a mass percentage of 0.2-1% of the monomer mixture A for temperature rising reaction to obtain acrylate polymer A; or,

[0033] The monomer mixture B composed of the main unit, the functional unit and the multifunctional UV monomer is mixed with the polymerization solvent at a mass ratio of 1: (1-9), and the polymerization photoinitiator is added at a mass percentage of 1-5% of the monomer mixture B for reaction under UV light to obtain acrylate polymer B.

[0034] In some embodiments, in the step of preparing the electro-strippable composition, the acrylic polymer B is mixed with the remaining components in a predetermined ratio, and the remaining components further include a polymerization photoinitiator in an amount of 1-5% by mass of the total mass of the acrylic polymer B.

[0035] A third aspect of the present application provides an adhesive article comprising an adhesive layer prepared from the electro-strippable composition prepared by the above method. DETAILED DESCRIPTION

[0036] "RANGES" disclosed herein are defined by both a lower and an upper limit, and a given range is defined by selecting a lower limit and an upper limit, the selected lower limit and upper limit defining the boundaries of the particular range. Ranges defined in this manner can be inclusive or exclusive of the end values, and can be arbitrarily combined, i.e., any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60-120 and 80-110 are listed, it is understood that ranges of 60-110 and 80-120 are also contemplated. Also, if minimum range values of 1 and 2 are listed, and if maximum range values of 3, 4, and 5 are listed, then the following ranges are all contemplated: 1-3, 1-4, 1-5, 2-3, 2-4, and 2-5. In the present application, unless otherwise stated, a numerical range "a-b" indicates a shorthand way of describing each and every intervening real number between the upper and lower limits of that range, wherein a and b are both real numbers. For example, the numerical range "0-5" indicates that all real numbers between "0-5" have been listed herein, and "0-5" is merely a shorthand way of describing those numerical combinations. Also, when a parameter is stated to be an integer ≥ 2, it is equivalent to disclose that the parameter is, for example, an integer 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0037] If not particularly specified, all embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions.

[0038] If not particularly specified, all technical features and optional technical features of the present application can be combined with each other to form new technical solutions.

[0039] If not particularly specified, all steps of the present application can be performed in sequence or randomly, and preferably in sequence. For example, the method comprises steps (a) and (b), which means that the method can comprise steps (a) and (b) in sequence, or steps (b) and (a) in sequence. For example, the method further comprises step (c), which means that step (c) can be added to the method in any sequence, for example, the method can comprise steps (a), (b) and (c), or steps (a), (c) and (b), or steps (c), (a) and (b), etc.

[0040] If not specifically stated, the "including" and "comprising" mentioned in the present application represent open type, and can also be closed type. For example, the "including" and "comprising" can also include or contain other components which are not listed, or can only include or contain the listed components.

[0041] If not specifically stated, in the present application, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, either of the following conditions satisfies the condition "A or B": A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or A and B are both true (or exist).

[0042] Based on the foregoing, the total inventive concept of the embodiments of the present application is to provide an electrically strippable composition. By designing raw material components such as an acrylate polymer, an ionic liquid, an auxiliary A, and an auxiliary B, the auxiliary A, the auxiliary B, and the acrylate polymer are used in a specific ratio to synergistically crosslink, so that the cohesion of the electrically strippable composition is greatly improved, and the adhesive layer formed by the electrically strippable composition has a high peeling strength and a strong adhesive retention before being electrified, so that the adhesive product made of the electrically strippable composition can have both easy peeling and adhesive properties when electrified.

[0043] Based on the above inventive concept, the electrically strippable composition provided by the embodiments of the present application includes the following components: an acrylate polymer, an ionic liquid, an auxiliary A, and an auxiliary B; the auxiliary A accounts for 10% to 30% of the total weight of the acrylate polymer; the mass ratio of the auxiliary A to the auxiliary B is (10-30):(1-10); and the auxiliary A and the auxiliary B are used to synergistically crosslink with the acrylate polymer.

[0044] It should be noted that the ionic liquid in the embodiments of the present application refers to a salt which is liquid at room temperature, also known as a room temperature molten salt. The ionic liquid is mainly composed of cations and anions, and has the characteristics of heat resistance, non-flammability, non-volatility, and chemical stability; under the application of voltage, the ionic liquid is electrolyzed, the adhesive force of the adhesive layer formed by the electrically strippable composition is reduced, so that the adhesive product made of the electrically strippable composition has the characteristics of easy peeling when electrified.

[0045] It should be understood that the introduction of the ionic liquid generally inhibits the crosslinking density of the electrically strippable composition, so that the cohesion is reduced, and the adjuvant A and the adjuvant B used in the component design of the present application can effectively overcome the loss of crosslinking density caused by the introduction of the ionic liquid by synergistic crosslinking with the acrylate polymer, so that the electrically strippable composition can have a suitable crosslinking density, thereby significantly improving the cohesion of the electrically strippable composition, so that the adhesive layer formed by the electrically strippable composition has excellent bonding retention, while having easy-to-strip electrical properties.

[0046] Meanwhile, the adjuvant A accounts for 10% to 30% of the total weight of the acrylate polymer, and within this weight range, the adjuvant A and the adjuvant B can be crosslinked with the acrylate polymer, thereby effectively increasing the crosslinking density and effectively improving the cohesion of the electrically strippable composition; when the adjuvant A accounts for less than 10% of the total weight of the acrylate polymer, the synergistic effect of the adjuvant A and the adjuvant B on the acrylate polymer is poor, and the adhesive layer formed by the electrically strippable composition has a low peel strength before electrification and is easy to peel off from the adherend; and when the adjuvant A accounts for more than 30% of the total weight of the acrylate polymer, the cohesion of the electrically strippable composition decays seriously, and the adhesive layer formed by the electrically strippable composition has poor bonding retention.

[0047] Furthermore, the mass ratio of the adjuvant A to the adjuvant B is (10-30):(1-10), and under this mass ratio, the adjuvant B and the adjuvant A can be crosslinked with the acrylate polymer to significantly improve the cohesion of the electrically strippable composition, and the adhesive layer formed by the electrically strippable composition can have both bonding retention and easy-to-strip electrical properties; when the mass ratio of the adjuvant A to the adjuvant B is too low, the crosslinking density of the electrically strippable composition is low, the cohesion of the electrically strippable composition is low, and the adhesive layer formed by the electrically strippable composition has poor bonding retention; and when the mass ratio of the adjuvant A to the adjuvant B is too high, the crosslinking density of the electrically strippable composition is too high, which causes the peel strength of the adhesive layer formed by the electrically strippable composition to decrease sharply, and the adhesive layer cannot be stably bonded to the adherend without applying voltage.

[0048] Therefore, the electrically strippable composition provided by the present application has a significantly improved cohesion through the synergistic combination of the acrylate polymer, the ionic liquid, the adjuvant A, and the adjuvant B, and the adhesive layer formed by the electrically strippable composition has a high peel strength and bonding retention before electrification, and can have both easy-to-strip electrical properties and excellent bonding performance.

[0049] It is to be understood that the amount of the auxiliary A is 10% to 30% by weight of the total weight of the acrylate polymer, for example, the amount of the auxiliary A can be 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30% or any amount within the range of 10% to 30% by weight of the total weight of the acrylate polymer; the mass ratio of the auxiliary A to the auxiliary B is (10-30):(1-10), for example, the mass ratio of the auxiliary A to the auxiliary B can be 10:1, 10:2, 10:3, 10:4, 10:5, 10:6, 10:7, 10:8, 10:9, 10:10, 15:1, 15:2, 15:3, 15:4, 15:5, 15:6, 15:7, 15:8, 15:9, 15:10, 20:1, 20:2, 20:3, 20:4, 20:5, 20:6, 20:7, 20:8, 20:9, 20:10, 25:1, 25:2, 25:3, 25:4, 25:5, 25:6, 25:7, 25:8, 25:9, 25:10, 30:1, 30:2, 30:3, 30:4, 30:5, 30:6, 30:7, 30:8, 30:9, 30:10 or any mass ratio within the range of (10-30):(1-10).

[0050] In some embodiments, the mass ratio of the auxiliary A to the auxiliary B is preferably (10-30):(1-5), more preferably (15-25):(1-5), and preferably the mass ratio of the auxiliary A to the auxiliary B is designed to help the auxiliary B and the auxiliary A together crosslink the acrylate polymer more sufficiently, so that the cohesion of the electrical stripping composition is further improved, and the adhesion retention and the easy-to-strip property under current of the adhesive layer formed by the electrical stripping composition can be taken into account.

[0051] In some embodiments, the components of the electrically strippable composition, in parts by weight, relative to 100 parts of the acrylate polymer, the ionic liquid is 2-30 parts, the auxiliary A is 10-30 parts, and the auxiliary B is 1-10 parts. By designing the ionic liquid to be 2-30 parts, the auxiliary A to be 10-30 parts, and the auxiliary B to be 1-10 parts, relative to 100 parts of the acrylate polymer, the cohesive strength of the electrically strippable composition can be effectively improved, the adhesive layer formed by the electrically strippable composition has high peeling strength and adhesive retention before being electrified, and the adhesive layer is easily peeled off from the adherend after being electrified, thereby achieving both easy peeling after electrification and excellent adhesive performance. For example, relative to 100 parts of the acrylate polymer, the ionic liquid can be 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, or any parts within the range of 2-30 parts, the auxiliary A can be 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, or any parts within the range of 10-30 parts, and the auxiliary B can be 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, or any parts within the range of 1-10 parts.

[0052] In some embodiments, the auxiliary B is preferably 1-5 parts, in parts by weight, relative to 100 parts of the acrylate polymer, so as to further promote the crosslinking of the acrylate polymer, further improve the cohesion of the electrically strippable composition, and achieve both adhesive retention and easy peeling after electrification of the adhesive layer formed by the electrically strippable composition.

[0053] In some embodiments, the ionic liquid is preferably 2-15 parts, and more preferably 2-9 parts, in parts by weight, relative to 100 parts of the acrylate polymer. The design of the weight parts of the ionic liquid is more conducive to reducing the influence on the crosslinking density of the electrically strippable composition, further improving the cohesion of the electrically strippable composition, and achieving both adhesive retention and easy peeling after electrification of the adhesive layer formed by the electrically strippable composition. If the ionic liquid is less than 2 parts, the easy peeling after electrification of the adhesive layer formed by the electrically strippable composition will be sharply attenuated, and it is impossible to achieve both adhesive retention and easy peeling after electrification.

[0054] In some embodiments, the auxiliary agent A comprises a linear active functional group-containing resin, and has a molecular weight of 200-1000. The active functional group-containing resin is capable of cross-linking reaction with the acrylate polymer, and due to the low molecular weight of the active functional group-containing resin, the auxiliary agent A has high reactivity, which promotes the synergistic cross-linking effect of the auxiliary agent A and the acrylate polymer, so as to increase the cross-linking density of the electrical stripping composition, thereby increasing the cohesion of the electrical stripping composition, and making the adhesive layer formed by the electrical stripping composition have high adhesive retention.

[0055] In some embodiments, the auxiliary agent B comprises a UV-curable resin and / or a non-UV-curable resin. The UV-curable resin or the non-UV-curable resin as the auxiliary agent B is capable of cross-linking reaction with the acrylate polymer to be cured into a film, makes up for the loss of cross-linking density caused by the introduction of the ionic liquid, increases the cohesion of the electrical stripping composition, and makes the adhesive layer formed by the electrical stripping composition have high adhesive retention. The auxiliary agent B adopts the UV-curable resin, which can participate in the free radical polymerization reaction with the acrylate polymer, further increases the cross-linking density, greatly increases the cohesion strength of the electrical stripping composition, and makes the adhesive layer formed by the electrical stripping composition have higher adhesive retention.

[0056] In some embodiments, the auxiliary agent A can be a reactive tackifying resin, and the auxiliary agent A comprises at least one of a rosin carboxyl-containing tackifying resin, an epoxy epoxy-containing tackifying resin, a phenol hydroxyl-containing tackifying resin, an acrylate tackifying resin, and a resin represented by the following formula I, formula II, and formula III,

[0057] wherein R1 represents a phenyl group, a cyclohexyl group, or a methylene group, R2 represents a methyl group, a hydroxyl group, a vinyl group, a carboxyl group, an epoxy group, a mercapto group, or an acryloyloxy group, and R represents a methyl group, a hydroxyl group, a vinyl group, a carboxyl group, an epoxy group, a mercapto group, or an acryloyloxy group.

[0058] The above substances are all reactive tackifying resins, which as the auxiliary agent A can ensure that the electrical stripping composition has high stripping strength before being electrified, and synergistically cross-link with the acrylate polymer to increase the cross-linking density of the electrical stripping composition, thereby effectively increasing the adhesive retention of the adhesive layer formed by the electrical stripping composition.

[0059] It should be noted that the auxiliary agent A can be obtained by commercial purchase, for example, the rosin carboxyl-containing tackifying resin can be purchased from ARDYME R-9520 of GOKAWA CHEMICAL, and for example, the resin of formula I can be purchased from TSR-6000 of YIQING CHEMICAL, but not limited to. In addition, in the case of knowing the target structure of any one of the above formula I, formula II, formula III resin, the resin with any one of the structures shown in formula I, formula II, formula III can also be prepared based on the existing resin, organic monomer and other raw materials by conventional synthesis or modification means, for example, the resin of formula II can be prepared based on the modification of dismutated rosin, and for example, the resin of formula III can be prepared based on the modification of p-t-octyl phenol formaldehyde resin, but not limited to.

[0060] It should be noted that the auxiliary agent A adopts a reactive tackifying resin, rather than a non-reactive tackifying resin, because the non-reactive tackifying resin cannot be synergistically crosslinked with the acrylate polymer, that is, it cannot promote the increase of the crosslinking density of the electrical release composition; moreover, the introduction of the non-reactive tackifying resin will inhibit the crosslinking of the acrylate polymer, so that the cohesion of the electrical release composition is sharply reduced, and then the adhesion layer formed by the electrical release composition has poor adhesion retention.

[0061] In some embodiments, when the auxiliary agent B is a non-UV curable resin, it includes at least one of isocyanate crosslinking agent, epoxy crosslinking agent, aziridine crosslinking agent or metal chelate crosslinking agent; the above-mentioned substances as non-UV curable resin can participate in crosslinking with the acrylate polymer, so as to promote the increase of the crosslinking density of the electrical release composition, so that the cohesion of the electrical release composition is improved.

[0062] In some embodiments, when the auxiliary agent B is a UV curable resin, it includes at least one of epoxy acrylate, polyurethane acrylate or polyester acrylate; the above-mentioned substances as UV curable resin can participate in crosslinking with the acrylate polymer, so as to further promote the increase of the crosslinking density of the electrical release composition, so that the electrical release composition has higher cohesion.

[0063] In some embodiments, the auxiliary agent B is a combination of UV curable resin and non-UV curable resin.

[0064] In some embodiments, the anion of the ionic liquid is bis(fluorosulfonyl)imide anion; the bis(fluorosulfonyl)imide anion has high thermal stability and chemical stability, and can maintain its performance in a wide temperature and chemical environment; in addition, the bis(fluorosulfonyl)imide anion also helps to improve the electrical conductivity of the electrical release composition, so that the adhesion interface of the adhesion layer formed by the electrical release composition can rapidly reduce the adhesion when the voltage is applied, thereby realizing the rapid peeling of the adhesion layer and the adherend.

[0065] In some embodiments, the cation of the ionic liquid comprises at least one of a nitrogen-containing onium cation, a sulfur-containing onium cation, a phosphorus-containing onium cation, an imidazolium cation, an ammonium cation, or a pyridinium cation; all of the above cations have excellent ionic conductivity and chemical stability, and can rapidly migrate under the action of voltage to impart better current-aided easy peelability to the adhesive layer formed by the electrically peelable composition.

[0066] For example, the ionic liquid in the embodiments of the present application can be obtained from the First Industrial Pharmaceutical, the Kanto Chemical, the Guangrong Chemical Industry, etc. For example, 1-ethyl-3-methylimidazolium bis(fluorosulfonyl)imide (AS-110) can be obtained from the First Industrial Pharmaceutical, 1-hexylpyridinium bis(trifluoromethylsulfonyl)imide, N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide, and 1-ethyl-3-methylimidazolium tetrafluoroborate can be obtained from the Kanto Chemical, 1-ethyl-3-methylimidazolium hexafluorophosphate (IL-C3), 1-butylpyridinium tetrafluoroborate (IL-P10), 1-hexylpyridinium bis(trifluoromethylsulfonyl)imide (IL-P14), and 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMI-TFSI) can be obtained from the Guangrong Chemical Industry.

[0067] In some embodiments, the solid content of the acrylate-based polymer is 10-50%; within this solid content range, the acrylate-based polymer is in a solution state, which facilitates the dispersion of the ionic liquid and the synergistic crosslinking with the auxiliary A and the auxiliary B, and thus enables the adhesive layer formed by the electrically peelable composition to have both current-aided easy peelability and adhesive retention.

[0068] In some embodiments, the weight average molecular weight of the acrylate-based polymer is greater than 100,000 and less than 5,000,000, preferably greater than 200,000 and less than 4,000,000, and more preferably greater than 300,000 and less than 3,000,000; the weight average molecular weight of the acrylate-based polymer being greater than 100,000 and less than 5,000,000 is conducive to the adhesive layer formed by the electrically peelable composition having lower cohesion after being electrified, which facilitates peeling from the adherend and leaves no residual glue after peeling from the adherend, thereby ensuring the recyclability of the adherend.

[0069] It should be noted that the weight average molecular weight in the embodiments of the present application refers to the value calculated using the GPC (System 21) of Shodex with tetrahydrofuran as the mobile phase, and the value is the polystyrene-equivalent weight average molecular weight.

[0070] In some embodiments, the glass transition temperature of the acrylate-based polymer is less than 0°C, preferably less than -20°C, and more preferably less than -40°C; the glass transition temperature of the acrylate-based polymer being less than 0°C can improve the initial adhesive force of the adhesive layer formed by the electrically peelable composition during the bonding process.

[0071] The glass transition temperature (Tg) in this embodiment can be calculated based on the following formula IV (Fox formula): 1 / Tg=W1 / Tg1+W2 / Tg2+·····+W n / Tg n (Ⅳ)

[0072] Where Tg represents the glass transition temperature of the polymer (unit: K), Tg i (i = 1, 2, ..., n) represents the glass transition temperature (in K) when monomer i forms a homopolymer, W i (i = 1, 2, ..., n) represents the weight fraction of monomer i in all monomer components. Equation (Ⅳ) above is the calculation formula when the polymer is composed of n monomer components: monomer 1, monomer 2, ..., monomer n. In addition, the glass transition temperature when forming a homopolymer refers to the glass transition temperature of the homopolymer of that monomer, and refers to the glass transition temperature (Tg) of the polymer formed by using only one monomer component.

[0073] In some embodiments, the acrylate polymer is made primarily from a host unit, functional units, and an initiator. The host unit is an alkyl (meth)acrylate containing 1 to 14 carbon atoms. The polymerization of this alkyl (meth)acrylate with 1 to 14 carbon atoms into an acrylate polymer ensures the curing and film formation of the electro-exfoliating composition. The functional units include carboxyl-containing acrylate monomers and / or hydroxyl-containing acrylate monomers. These carboxyl- and / or hydroxyl-containing acrylate monomers, after polymerization with the host unit under the action of an initiator, result in an acrylate polymer that can crosslink with additives A and B. This allows the electro-exfoliating composition to cure into a film while possessing high cohesive strength, effectively improving the adhesion retention of the adhesive layer formed by the electro-exfoliating composition. The initiator includes any one of a thermal polymerization initiator and a photopolymerization initiator. Both thermal polymerization initiators and photopolymerization initiators can initiate the polymerization reaction of monomer molecules, enabling the host unit, functional units, and other monomers to polymerize and form the acrylate polymer.

[0074] In some embodiments, the functional unit can be a single carboxyl-containing acrylate monomer, a single hydroxyl-containing acrylate monomer, or a carboxyl / hydroxyl-containing acrylate monomer. The separate or combined introduction of carboxyl and hydroxyl functional groups is beneficial to enhancing the synergistic crosslinking reaction between the acrylate polymer and additives A and B, thereby significantly increasing the crosslinking density of the electro-peelable composition, which is conducive to improving the adhesive retention force of the adhesive layer formed by the electro-peelable composition.

[0075] It should be noted that the weight fraction of the (meth) acrylate alkyl ester containing alkyl with carbon number 1-14 in the embodiment of the present application as the main unit can be 60-95 wt% of the total monomers of the acrylate polymer; and the functional unit as the main contribution unit for the acrylate polymer to produce cross-linking reaction with the auxiliary A and the auxiliary B can be 5-30 wt% of the total monomers of the acrylate polymer.

[0076] Further, in the (meth) acrylate alkyl ester containing alkyl with carbon number 1-14 in the embodiment of the present application, the (meth) acrylate alkyl ester refers to methyl acrylate or acrylate. For example, the (meth) acrylate alkyl ester containing alkyl with carbon number 1-14 can be (meth) acrylate methyl ester, (meth) acrylate ethyl ester, (meth) acrylate n-propyl ester, (meth) acrylate isopropyl ester, (meth) acrylate n-butyl ester, (meth) acrylate sec-butyl ester, (meth) acrylate tert-butyl ester, (meth) acrylate n-octyl ester, (meth) acrylate isooctyl ester, (meth) acrylate 2-ethylhexyl ester, (meth) acrylate isononyl ester, and (meth) acrylate dodecyl ester, etc. These (meth) acrylate alkyl esters can be used alone or in combination of two or more when preparing the acrylate polymer.

[0077] Further, in the functional unit of the embodiment of the present application, the carboxyl-containing acrylate monomer can be, for example, carboxyl-containing monomers such as acrylic acid, methacrylic acid, carboxyethyl acrylate, etc., and the hydroxyl-containing acrylate monomer can be, for example, hydroxyl-containing monomers such as (meth) acrylate 2-hydroxyethyl ester, (meth) acrylate 2-hydroxypropyl ester, (meth) acrylate 4-hydroxybutyl ester, (meth) acrylate 6-hydroxyhexyl ester, and (meth) acrylate (4-hydroxymethylcyclohexyl) methyl ester, etc. The monomers listed in the above functional unit can be used alone or in combination of two or more when preparing the acrylate polymer.

[0078] In some embodiments, when the initiator is a polymerization thermal initiator, the mass ratio of the main unit to the functional unit is (70-95):(5-30); the mass ratio of the main unit to the functional unit in this range can be polymerized under the action of the polymerization thermal initiator, and the prepared acrylate polymer can be fully cross-linked with the auxiliary A and the auxiliary B to improve the cross-linking density of the electrical release property composition, so that the electrical release property composition has higher cohesion, thereby improving the bonding retention of the adhesive layer formed by the electrical release property composition.

[0079] In some embodiments, when the initiator is a polymerization photoinitiator, the raw material of the acrylate polymer further comprises a multifunctional UV monomer, which can account for 0.1-10 wt% of the total monomers of the acrylate polymer. The introduction of the multifunctional UV monomer is conducive to the synergistic crosslinking of the UV-curable resin of the auxiliary B under the action of the auxiliary A, so as to improve the crosslinking density of the electrically strippable composition, greatly improve the cohesion of the electrically strippable composition, and significantly improve the bonding retention of the adhesive layer formed by the electrically strippable composition. Moreover, the introduction of the multifunctional UV monomer is also conducive to improving the weather resistance of the electrically strippable composition, so that the adhesive layer formed thereby has better bonding retention.

[0080] Further, the multifunctional UV monomer in the embodiments of the present application can be, for example, polyethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, dipentaerythritol hexa(meth)acrylate, etc. These multifunctional UV monomers can be used alone or in combination with two or more in the preparation of the acrylate polymer.

[0081] In some embodiments, the mass ratio of the main unit, the functional unit and the multifunctional UV monomer is (60-95):(3-30):(2-10), preferably (60-85):(10-30):(5-10). Within the above mass ratio range, the main unit, the functional unit and the multifunctional UV monomer can be polymerized under the action of the polymerization photoinitiator, and the prepared acrylate polymer can have the characteristics of the functional unit and the multifunctional UV monomer, so as to be crosslinked with the auxiliary A and the auxiliary B, so that the cohesion of the strippable composition is further improved, thereby inhibiting the loss of crosslinking density caused by the introduction of the ionic liquid and other non-reactive components.

[0082] In some embodiments, in order to provide a polymerization reaction environment for the monomers such as the main unit and the functional unit, the raw material of the acrylate polymer further comprises a polymerization solvent, which comprises at least one of aliphatic hydrocarbons, ester compounds and aromatic hydrocarbons. The above substances can provide the reaction environment required for the polymerization of the monomers such as the main unit and the functional unit, so that the monomers can stably form the acrylate polymer under the action of the initiator.

[0083] In some embodiments, the thermal polymerization initiator includes any one of azo-based polymerization initiators 2,2'-azobis(isobutyronitrile), 2,2'-azobis(2-methylpropionamidine) disulfide, 2,2'-azobis(4-methoxy-2,4-dimethylvaleronitrile), 2,2'-azobis(2,4-dimethylvaleronitrile), 2,2'-azobis(2-methylbutyronitrile), 1,1'-azobis(cyclohexane-1-carbonitrile), 2,2'-azobis(2,4,4-trimethylpentane), dimethyl-2,2'-azobis(2-methylpropionate), 2,2'-azobis[2-methyl-N-(phenylmethyl)-propionamidine] dihydrochloride, 2,2'-azobis[2-(3,4,5,6-tetrahydropyrimidin-2-yl)propane] dihydrochloride, or 2,2'-azobis[2-(2-imidazolin-2-yl)propane], or any one of persulfate compounds potassium persulfate or ammonium persulfate; the above-mentioned substances as thermal polymerization initiators can all initiate the polymerization of the host unit and the functional unit, so that the host unit and the functional unit are polymerized to form the acrylate polymer.

[0084] In some embodiments, the photopolymerization initiator includes any one of type I photoinitiators hydroxypropioanilide, alkylaminoacetophenone, benzoin ether, or phosphine oxide, or any one of type II initiators benzophenone, substituted benzophenone, anthraquinone, benzoylformate, camphorquinone, or thioxanthone. The above-mentioned substances as photopolymerization initiators can all initiate the polymerization of the host unit, the functional unit, and the multifunctional UV monomer, so that the host unit, the functional unit, and the multifunctional UV monomer are polymerized to form the acrylate polymer.

[0085] Another embodiment of the present application provides a method for preparing an electrostrippable composition, comprising:

[0086] The acrylate polymer preparation step: the host unit, the functional unit, and the polymerization solvent are mixed with the thermal polymerization initiator at a predetermined ratio to obtain an acrylate polymer A; or the host unit, the functional unit, the multifunctional UV monomer, and the polymerization solvent are mixed with the photopolymerization initiator at a predetermined ratio to obtain an acrylate polymer B;

[0087] The electrostrippable composition preparation step: the acrylate polymer A or the acrylate polymer B is mixed with the remaining components at a predetermined ratio to obtain an electrostrippable composition.

[0088] It can be understood that the acrylate polymer in the embodiment can be prepared by solution polymerization or UV photopolymerization. When the solution polymerization is used, the acrylate polymer preparation step is to mix and react the main unit, the functional unit and the polymerization solvent with the polymerization thermal initiator according to the predetermined proportion. In the preparation process, the polymerization solvent can dissolve the main unit and the functional unit, so that the two units fully contact in the reaction system. The acrylate polymer A is obtained through the polymerization reaction of the polymerization thermal initiator. When the UV photopolymerization is used, the acrylate polymer preparation step is to mix and react the main unit, the functional unit, the multifunctional UV monomer and the polymerization solvent with the polymerization photoinitiator according to the predetermined proportion. The polymerization solvent can dissolve the main unit, the functional unit and the multifunctional UV monomer, so that the monomers fully contact in the reaction system. The acrylate polymer B is obtained through the polymerization reaction of the polymerization photoinitiator.

[0089] In the electrically strippable composition preparation step, the acrylate polymer A or the acrylate polymer B is uniformly mixed with the remaining components according to the predetermined proportion and is defoamed, and thus the electrically strippable composition with excellent quality can be obtained.

[0090] In some embodiments, the acrylate polymer preparation step includes: mixing the monomer mixture A composed of the main unit and the functional unit with the polymerization solvent according to the mass ratio of 1:(1-9), and adding the polymerization thermal initiator with a mass percentage of 0.2-1% of the monomer mixture A to heat the reaction, to obtain the acrylate polymer A.

[0091] In some preferred embodiments, when the solution polymerization is used, the acrylate polymer preparation step includes: composing the monomer mixture A from the main unit and the functional unit according to the mass ratio of (70-95):(5-30); putting the monomer mixture A and the polymerization solvent into a reaction container according to the mass ratio of 1:(1-9), and stirring for 0.5-2 h until all the materials are dissolved under the protection of nitrogen; adding the polymerization thermal initiator with a mass percentage of 0.2-1% of the monomer mixture, and stirring and heating to 60-90°C for 4-10 h, to obtain the acrylate polymer A.

[0092] In some embodiments, the acrylate polymer preparation step specifically includes: mixing the monomer mixture B composed of the main unit, the functional unit and the multifunctional UV monomer with the polymerization solvent according to the mass ratio of 1:(1-9), and adding the polymerization photoinitiator with a mass percentage of 1-5% of the monomer mixture B to react in the UV light environment, to obtain the acrylate polymer B.

[0093] In some preferred embodiments, when the UV photopolymerization method is used, the preparation step of the acrylate polymer comprises: forming a monomer mixture B by mixing the main unit, the functional unit and the multi-functional UV monomer in a mass ratio of (60-95):(3-30):(2-10); putting the monomer mixture B and a polymerization solvent in a mass ratio of 1:(1-9) into a reaction container, and adding a polymerization photoinitiator in an amount of 1-5% of the mass of the monomer mixture; stirring under nitrogen protection for 0.5-2 hours until all the materials are completely dissolved; irradiating the reaction container with a 365 nm UV-LED for 10-30 minutes while stirring to obtain the acrylate polymer B.

[0094] In some embodiments, in the preparation step of the electrically strippable composition, when the acrylate polymer B is mixed with the remaining components in a predetermined proportion for reaction, the remaining components further comprise a polymerization photoinitiator in an amount of 1-5% of the total mass of the acrylate polymer B. By further adding a polymerization photoinitiator in an amount of 1-5% of the total mass of the acrylate polymer B in the preparation step of the electrically strippable composition, the electrically strippable composition can more easily form an adhesive layer during the curing process.

[0095] Another embodiment of the present application provides an adhesive article comprising a substrate and an adhesive layer formed on the surface of the substrate by coating the electrically strippable composition described above or prepared by the preparation method described above.

[0096] It should be noted that the substrate of the adhesive article is preferably an electrically conductive object, which can be, for example, an electrically conductive adherend, an electrically conductive auxiliary material, an electrically conductive substrate or an electrically conductive fixed object, so as to facilitate the conduction of electric current to the adhesive layer formed by the electrically strippable composition, making the adhesive layer more easily peeled off from the adherend.

[0097] In addition, the adhesive article provided by the embodiments of the present application can be an adhesive sheet and an adhesive tape. Taking the adhesive article as an adhesive tape, for example, in the preparation process thereof, the electrically strippable composition described above can be coated on the surface of a release-treated polyester film and dried to form an adhesive layer, thereby obtaining an adhesive tape. The adhesive tape can be pasted in contact with an electrically conductive object. When a voltage of 12 V is applied to the adhesive layer formed by the electrically strippable composition for 30 seconds, the adhesive layer can be peeled off from the electrically conductive object to which it is directly pasted without leaving any residue.

[0098] The embodiments of the present application will be described in detail below with reference to specific examples, but those skilled in the art will understand that the following examples are only used to illustrate the present application and should not be regarded as limiting the scope of the present application. If no specific conditions are specified in the examples, the conventional conditions or the conditions recommended by the manufacturer are used. If no manufacturer of the reagent or instrument is specified, it is a conventional product that can be purchased on the market.

[0099] Example 1

[0100] The acrylic ester polymer preparation step: a monomer mixture of 75 parts of n-butyl acrylate, 20 parts of methyl acrylate, and 5 parts of 2-hydroxyethyl acrylate was put into a four-necked flask with 150 parts of a polymerization solvent, which was stirred for 1 h under nitrogen protection until all the materials were completely dissolved, wherein the polymerization solvent was composed of 135 parts of ethyl acetate and 15 parts of toluene; then 0.3 parts of a polymerization thermal initiator, azobisisobutyronitrile (AIBN), was added, and the reaction was carried out at 80-85°C for 5 h under stirring to obtain an acrylic ester polymer with a solid content of 40%.

[0101] The electrical stripping composition preparation step: the above acrylic ester polymer was mixed with 1 part of the isocyanate crosslinking agent TG-1, 5 parts of the ionic liquid EMIBF4, and 20 parts of the reactive tackifying resin (resin of Formula II) to be dispersed at room temperature for 5 min by using a high-speed mixer, and then deaerated to obtain an adhesive composition A1.

[0102] Example 2

[0103] The acrylic ester polymer preparation step: a monomer mixture of 85 parts of n-butyl acrylate, 10 parts of acrylic acid, and 5 parts of 2-hydroxyethyl acrylate was put into a four-necked flask with 150 parts of a polymerization solvent, which was stirred for 1 h under nitrogen protection until all the materials were completely dissolved, wherein the polymerization solvent was composed of 135 parts of ethyl acetate and 15 parts of toluene; then 0.3 parts of a polymerization thermal initiator, azobisisobutyronitrile (AIBN), was added, and the reaction was carried out at 80-85°C for 5 h under stirring to obtain an acrylic ester polymer with a solid content of 40%.

[0104] The electrical stripping composition preparation step: the above acrylic ester polymer was mixed with 1 part of the isocyanate crosslinking agent TG-1, 5 parts of the ionic liquid EMIBF4, and 20 parts of the reactive tackifying resin (resin of Formula II) to be dispersed at room temperature for 5 min by using a high-speed mixer, and then deaerated to obtain an adhesive composition A1.

[0105] Example 3

[0106] The acrylic ester polymer preparation step: a monomer mixture of 80 parts of n-butyl acrylate, 10 parts of acrylic acid, 5 parts of 2-hydroxyethyl acrylate, and 5 parts of 1,6-hexanediol diacrylate was put into a four-necked flask with 150 parts of a polymerization solvent and 3 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone, which was stirred for 1 h under nitrogen protection until all the materials were completely dissolved, wherein the polymerization solvent was 150 parts of ethyl acetate; then the reaction was carried out under stirring for 20 min by using a 365 nm UV-LED to obtain an acrylic ester polymer with a solid content of 40%.

[0107] Electrical stripping composition preparation step: The above acrylic ester polymer was mixed with 2 parts of polyurethane acrylate CN007, 5 parts of ionic liquid AS-110, 20 parts of a reactive tackifying resin (resin of Formula I), and 3 parts of hydroxycyclohexanone at room temperature using a high-speed mixer for 5 minutes at high speed and was degassed to obtain an adhesive composition A3.

[0108] Example 4

[0109] Acrylate polymer preparation step: A monomer mixture consisting of 60 parts of n-butyl acrylate, 20 parts of methyl acrylate, and 15 parts of 2-hydroxyethyl acrylate and 5 parts of polyethylene glycol diacrylate was put into a four-necked flask with 150 parts of a polymerization solvent and 3 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone under nitrogen protection, and stirred for 1 h until all the materials were completely dissolved, wherein the polymerization solvent was 150 parts of ethyl acetate; then irradiated with a 365 nm UV-LED for 20 minutes under stirring to obtain an acrylate polymer with a solid content of 40%.

[0110] Electrical stripping composition preparation step: The above acrylic ester polymer was mixed with 2 parts of polyurethane acrylate 6145-100, 5 parts of ionic liquid EMIBF4, 20 parts of a reactive tackifying resin (resin of Formula II), and 3 parts of hydroxycyclohexanone at room temperature using a high-speed mixer for 5 minutes at high speed and was degassed to obtain an adhesive composition A4.

[0111] Example 5

[0112] Acrylate polymer preparation step: A monomer mixture consisting of 70 parts of n-butyl acrylate, 10 parts of acrylic acid, and 10 parts of 2-hydroxyethyl acrylate, 5 parts of 1,6-hexanediol diacrylate, and 5 parts of polyethylene glycol diacrylate was put into a four-necked flask with 150 parts of a polymerization solvent and 3 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone under nitrogen protection, and stirred for 1 h until all the materials were completely dissolved, wherein the polymerization solvent was 150 parts of ethyl acetate; then irradiated with a 365 nm UV-LED for 20 minutes under stirring to obtain an acrylate polymer with a solid content of 40%.

[0113] Electrical stripping composition preparation step: The above acrylic ester polymer was mixed with 2 parts of polyurethane acrylate 6145-100, 5 parts of ionic liquid EMIBF4, 20 parts of a reactive tackifying resin (resin of Formula III), and 3 parts of hydroxycyclohexanone at room temperature using a high-speed mixer for 5 minutes at high speed and was degassed to obtain an adhesive composition A5.

[0114] Example 6

[0115] Acrylate polymer preparation step: A monomer mixture consisting of 60 parts of n-butyl acrylate, 20 parts of methyl acrylate, and 15 parts of 2-hydroxyethyl acrylate and 5 parts of polyethylene glycol diacrylate was put into a four-necked flask with 150 parts of a polymerization solvent and 3 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone, and stirred for 1 h under nitrogen protection until all the materials were completely dissolved, wherein the polymerization solvent was 150 parts of ethyl acetate; then irradiated with a 365 nm UV-LED for 20 minutes under stirring to obtain an acrylate polymer with a solid content of 40%.

[0116] Electrical stripping composition preparation step: The above acrylate polymer was mixed with 0.5 parts of isocyanate crosslinker TG-1, 1.5 parts of polyurethane acrylate 6145-100, 10 parts of ionic liquid AS-110, 20 parts of reactive tackifying resin (resin of formula II), and 3 parts of hydroxycyclohexanone, and dispersed at high speed for 5 minutes at room temperature using a high-speed mixer, and defoamed to obtain adhesive composition A6.

[0117] Example 7

[0118] Acrylate polymer preparation step: A monomer mixture consisting of 60 parts of n-butyl acrylate, 20 parts of methyl acrylate, and 15 parts of 2-hydroxyethyl acrylate and 5 parts of polyethylene glycol diacrylate was put into a four-necked flask with 150 parts of a polymerization solvent and 3 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone, and stirred for 1 h under nitrogen protection until all the materials were completely dissolved, wherein the polymerization solvent was 150 parts of ethyl acetate; then irradiated with a 365 nm UV-LED for 20 minutes under stirring to obtain an acrylate polymer with a solid content of 40%.

[0119] Electrical stripping composition preparation step: The above acrylate polymer was mixed with 2 parts of polyurethane acrylate 6145-100, 20 parts of ionic liquid EMIBF4, 20 parts of reactive tackifying resin (resin of formula II), and 3 parts of hydroxycyclohexanone, and dispersed at high speed for 5 minutes at room temperature using a high-speed mixer, and defoamed to obtain adhesive composition A7.

[0120] Example 8

[0121] Acrylate polymer preparation step: A monomer mixture consisting of 60 parts of n-butyl acrylate, 20 parts of methyl acrylate, and 15 parts of 2-hydroxyethyl acrylate and 5 parts of polyethylene glycol diacrylate was put into a four-necked flask with 150 parts of a polymerization solvent and 3 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone, and stirred for 1 h under nitrogen protection until all the materials were completely dissolved, wherein the polymerization solvent was 150 parts of ethyl acetate; then irradiated with a 365 nm UV-LED for 20 minutes under stirring to obtain an acrylate polymer with a solid content of 40%.

[0122] Electrical stripping composition preparation step: The above acrylic ester polymer was mixed with 2 parts of polyurethane acrylate CN007, 5 parts of ionic liquid AS-110, 30 parts of a reactive tackifying resin (resin of Formula I), and 3 parts of hydroxycyclohexanone, and was dispersed at high speed for 5 minutes at room temperature using a high-speed mixer, and was degassed to obtain an adhesive composition A8.

[0123] Example 9

[0124] Acrylate polymer preparation step: A monomer mixture of 80 parts of n-butyl acrylate, 10 parts of acrylic acid, and 5 parts of 2-hydroxyethyl acrylate, and 5 parts of 1,6-hexanediol diacrylate was put into a four-necked flask along with 150 parts of a polymerization solvent and 3 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone, and was stirred for 1 h under nitrogen gas protection until all the materials were completely dissolved, wherein the polymerization solvent was 150 parts of ethyl acetate; then, it was irradiated with a 365 nm UV-LED for 20 minutes under stirring to obtain an acrylate polymer having a solid content of 40%.

[0125] Electrical stripping composition preparation step: The above acrylate polymer was mixed with 2 parts of polyurethane acrylate CN007, 5 parts of ionic liquid EMIBF4, 10 parts of a reactive tackifying resin (resin of Formula I), and 3 parts of hydroxycyclohexanone, and was dispersed at high speed for 5 minutes at room temperature using a high-speed mixer, and was degassed to obtain an adhesive composition A9.

[0126] Comparative Example 1

[0127] Acrylate polymer preparation step: A monomer mixture of 85 parts of n-butyl acrylate, 10 parts of acrylic acid, and 5 parts of 2-hydroxyethyl acrylate was put into a four-necked flask along with 150 parts of a polymerization solvent, and was stirred for 1 h under nitrogen gas protection until all the materials were completely dissolved, wherein the polymerization solvent was composed of 135 parts of ethyl acetate and 15 parts of toluene; then, 0.3 parts of a polymerization thermal initiator, azobisisobutyronitrile (AIBN), was added, and was reacted for 5 hours under stirring while being warmed to a range of 80 to 85°C to obtain an acrylate polymer having a solid content of 40%.

[0128] Electrical stripping composition preparation step: The above acrylate polymer was mixed with 1 part of an epoxy crosslinking agent TG-6, 5 parts of ionic liquid EMIBF4, and 20 parts of a non-reactive tackifying resin GA-85, and was dispersed at high speed for 5 minutes at room temperature using a high-speed mixer, and was degassed to obtain an adhesive composition B1.

[0129] Comparative Example 2

[0130] Acrylate polymer preparation step: A monomer mixture consisting of 60 parts of n-butyl acrylate, 20 parts of methyl acrylate, 15 parts of 2-hydroxyethyl acrylate, and 5 parts of polyethylene glycol diacrylate was put into a four-necked flask with 150 parts of a polymerization solvent and 3 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone, and stirred for 1 h under nitrogen protection until all the materials were completely dissolved, wherein the polymerization solvent was 150 parts of ethyl acetate; then irradiated with a 365 nm UV-LED for 20 min under stirring to obtain an acrylate polymer with a solid content of 40%.

[0131] Electrical stripping composition preparation step: The above acrylate polymer was mixed with 5 parts of ionic liquid AS-110, 20 parts of non-reactive tackifying resin GA-85, and 3 parts of hydroxycyclohexanone, and dispersed at high speed for 5 min at room temperature using a high-speed mixer, and then deaerated to obtain adhesive composition B2.

[0132] Comparative Example 3

[0133] Acrylate polymer preparation step: A monomer mixture consisting of 60 parts of n-butyl acrylate, 20 parts of methyl acrylate, 15 parts of 2-hydroxyethyl acrylate, and 5 parts of polyethylene glycol diacrylate was put into a four-necked flask with 150 parts of a polymerization solvent and 3 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone, and stirred for 1 h under nitrogen protection until all the materials were completely dissolved, wherein the polymerization solvent was 150 parts of ethyl acetate; then irradiated with a 365 nm UV-LED for 20 min under stirring to obtain an acrylate polymer with a solid content of 40%.

[0134] Electrical stripping composition preparation step: The above acrylate polymer was mixed with 2 parts of polyurethane acrylate 6145-100, 5 parts of ionic liquid EMIBF4, 5 parts of a reactive tackifying resin (resin of Formula II), and 3 parts of hydroxycyclohexanone, and dispersed at high speed for 5 min at room temperature using a high-speed mixer, and then deaerated to obtain adhesive composition B3.

[0135] Comparative Example 4

[0136] Acrylate polymer preparation step: A monomer mixture consisting of 60 parts of n-butyl acrylate, 20 parts of methyl acrylate, 15 parts of 2-hydroxyethyl acrylate, and 5 parts of polyethylene glycol diacrylate was put into a four-necked flask with 150 parts of a polymerization solvent and 3 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone, and stirred for 1 h under nitrogen protection until all the materials were completely dissolved, wherein the polymerization solvent was 150 parts of ethyl acetate; then irradiated with a 365 nm UV-LED for 20 min under stirring to obtain an acrylate polymer with a solid content of 40%.

[0137] Electrical stripping composition preparation step: The above acrylic ester polymer was mixed with 2 parts of polyurethane acrylate 6145-100, 5 parts of ionic liquid EMIBF4, 40 parts of a reactive tackifying resin (resin of Formula II), and 3 parts of hydroxycyclohexanone, and dispersed at high speed for 5 minutes at room temperature using a high-speed mixer, and defoamed to obtain an adhesive composition B4.

[0138] Comparative Example 5

[0139] Acrylate polymer preparation step: A monomer mixture consisting of 60 parts of n-butyl acrylate, 20 parts of methyl acrylate, 15 parts of 2-hydroxyethyl acrylate, and 5 parts of polyethylene glycol diacrylate was put into a four-necked flask with 150 parts of a polymerization solvent and 3 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone, and stirred for 1 h under nitrogen protection until all the materials were completely dissolved, wherein the polymerization solvent was 150 parts of ethyl acetate; then irradiated with a 365 nm UV-LED for 20 minutes under stirring to obtain an acrylate polymer with a solid content of 40%.

[0140] Electrical stripping composition preparation step: The above acrylic ester polymer was mixed with 2 parts of polyurethane acrylate 6145-100, 5 parts of ionic liquid AS-110, and 3 parts of hydroxycyclohexanone, and dispersed at high speed for 5 minutes at room temperature using a high-speed mixer, and defoamed to obtain an adhesive composition B5.

[0141] Comparative Example 6

[0142] Acrylate polymer preparation step: A monomer mixture consisting of 60 parts of n-butyl acrylate, 20 parts of methyl acrylate, 15 parts of 2-hydroxyethyl acrylate, and 5 parts of polyethylene glycol diacrylate was put into a four-necked flask with 150 parts of a polymerization solvent and 3 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone, and stirred for 1 h under nitrogen protection until all the materials were completely dissolved, wherein the polymerization solvent was 150 parts of ethyl acetate; then irradiated with a 365 nm UV-LED for 20 minutes under stirring to obtain an acrylate polymer with a solid content of 40%.

[0143] Electrical stripping composition preparation step: The above acrylic ester polymer was mixed with 5 parts of ionic liquid EMIBF4, 20 parts of a reactive tackifying resin (resin of Formula II), and 3 parts of hydroxycyclohexanone, and dispersed at high speed for 5 minutes at room temperature using a high-speed mixer, and defoamed to obtain an adhesive composition B6.

[0144] Note that the n-butyl acrylate and methyl acrylate in the (meth)acrylate alkyl ester monomers used in the above examples and comparative examples are all from Zhejiang Taizhou Plastic; the acrylic acid in the carboxyl-containing acrylate monomers is from Wanhua; the 2-hydroxyethyl acrylate in the hydroxyl-containing acrylate monomers is from Jiangsu Yulong; the 1,6-hexanediol diacrylate and polyethylene glycol diacrylate in the multifunctional UV monomers are from Changxing Chemical; the 2-hydroxy-2-methyl-1-phenyl-1-propanone (1173 polymerization photoinitiator) and hydroxycyclohexane phenyl ketone (184 polymerization photoinitiator) in the initiators are both commercially available polymerization photoinitiators; in the auxiliary B, the isocyanate crosslinking agent TG-1 and the epoxy crosslinking agent TG-6 are both from Tayca Chemical, the polyurethane acrylate is from Sartomer Chemical CN007, the polyurethane acrylate is from Changxing Chemical 6145-100; the ionic liquid EMIBF4 is from Showa Denko K.K., the ionic liquid AS-110 is from the First Industrial Pharmaceutical; in the auxiliary A, the reactive tackifying resin ARDYME R-9520 (rosin tackifying resin containing carboxyl groups) is from Arakawa Chemical, the reactive tackifying resin (resin of formula I) is from Yiqing Chemical TSR-6000, the non-reactive tackifying resin GA-85 is from Arakawa Chemical, the reactive tackifying resin (resin of formula II) and the reactive tackifying resin (resin of formula III) are self-made, wherein the resin of formula II is obtained by modifying disproportionated rosin (R in the resin of formula II is acryloxy), and the resin of formula III is obtained by modifying p-tert-octyl phenol formaldehyde resin.

[0145] The component information of the electrical stripping compositions A1-B6 of the above examples and comparative examples is shown in Table 1 below:

[0146] Table 1, Component Information Statistics Table of Electrical Stripping Compositions

[0147] To verify the performance of the electrical stripping compositions A1-B6 prepared in the examples and comparative examples, the electrical stripping compositions A1-B6 were respectively made into adhesive products, and the preparation process was as follows:

[0148] The electrical stripping compositions A1, A2 and B1 were respectively coated onto a polyethylene terephthalate film PET (thickness 50 μm) whose surface was subjected to release treatment, then dried at 80°C for 3 minutes to obtain an electrical stripping adhesive layer with a dry film thickness of 50 μm, then cured at 40°C for 3 days, and finally a release film was arranged on the surface of the adhesive layer to obtain an adhesive product. And,

[0149] The electrically peelable compositions A3 to A8 and B2 to B6 were coated respectively on a polyethylene terephthalate film PET (thickness 50 μm) whose surface was release-treated, and then light-cured under a 365 nm UV-LED lamp for 3 minutes to obtain an electrically peelable adhesive layer having a dry film thickness of 50 μm, and then a release film was provided on the surface of the adhesive layer to obtain an adhesive article.

[0150] The adhesive articles obtained from the electrically peelable compositions A1 to B6 in each of the examples and comparative examples were subjected to performance tests, and the test procedures for any one of the adhesive articles A1 to B6 were taken as an example, and the test methods included:

[0151] Test of initial peel strength: three samples of 25 mm x 100 mm in size were prepared; one side of the release film was torn off, and the pressure-sensitive surface was attached to the PET film which was not release-treated, avoiding air bubbles and wrinkles; a 2 kg roller was used to roll back and forth at a speed of 300 mm / min for 3 times; the other side of the release film was torn off, and the other side of the pressure-sensitive surface was attached to the steel plate, avoiding air bubbles and wrinkles; a 2 kg roller was used to roll back and forth at a speed of 300 mm / min for 3 times, and the samples were left to stand at room temperature for 30 min; a special test tape was attached to the back of the PET film; one end of the steel plate was fixed to the lower clamp of the tensile testing machine and was perpendicular to the horizontal plane, and the equipment was zeroed; the test rate was 300 mm / min, and the ∠180° peel strength was tested; the average value of a length of 60 mm after stabilization was taken.

[0152] Test of peel strength after power-on: three samples of 25 mm x 100 mm in size were prepared; one side of the release film was torn off, and the pressure-sensitive surface was attached to the aluminum foil, avoiding air bubbles and wrinkles; after the 2 kg roller was used to roll back and forth at a speed of 300 mm / min for 3 times, the sample was cut from the aluminum foil; the other side of the release film was torn off, and the other side of the pressure-sensitive surface was attached to the steel plate, avoiding air bubbles and wrinkles; a 2 kg roller was used to roll back and forth at a speed of 300 mm / min for 3 times, and the samples were left to stand at room temperature for 30 min; a special test tape was attached to the back of the aluminum foil, a 12 V electrode was installed, and power was turned on for 30 S, with the steel plate side as the negative electrode and the aluminum foil side as the positive electrode; one end of the steel plate was fixed to the lower clamp of the tensile testing machine and was perpendicular to the horizontal plane after power-on, and the equipment was zeroed; the test rate was 300 mm / min, and the ∠180° peel strength was tested; the average value of a length of 60 mm after stabilization was taken.

[0153] Room temperature and high temperature holding strength test: prepare 3 pieces of 25mm x 100mm size sample; tear off one side of the release film and attach the adhesive product to the special stainless steel plate with length markings, with an adhesive length of 25mm, ensuring no bubbles and in the center of the steel plate; use a 2kg pressure roller at a speed of 300mm / min for one round trip, and cure at room temperature for 20min; after fixing with a stapler, hang it on the room temperature or high temperature (70°C) holding strength equipment and add a 1Kg counterweight, record the time when the adhesive product falls off the stainless steel plate.

[0154] The test results of the adhesive products prepared from the electrical stripping compositions A1-B6 in each embodiment and comparative example are shown in Table 2 below.

[0155] Table 2, adhesive product performance test data statistics table

[0156] The advantages of the embodiments of the present application are analyzed in combination with Table 1 and Table 2.

[0157] From Table 1 and Table 2, it can be seen that, compared with Example 2, Comparative Example 1 uses non-reactive tackifying resin GA-85 as additive A, and non-reactive tackifying resin GA-85 cannot participate in the crosslinking reaction of the acrylate polymer with additive B, so that the adhesive product prepared has good initial peeling strength and low post-power peeling strength, but its room temperature holding time is only 10h and its high temperature holding time is only 0.5h, both of which are shorter than those of Example 2; on the contrary, Example 2 uses reactive tackifying resin ARDYME R-9520 as additive A, and the adhesive product prepared has good initial peeling strength and low post-power peeling strength, and its room temperature holding time is 590h and its high temperature holding time is 590h, so that Example 2 has higher room temperature and high temperature holding strength than Comparative Example 1, which shows that when the mass ratio of additive A to additive B is (10-30):(1-10) and the mass fraction of additive A in the total weight of the acrylate polymer is 10%-30%, additive A and additive B can crosslink with the acrylate polymer, so that the adhesive layer formed by the electrical stripping composition can have high peeling strength before power-on, easy peeling after power-on, and high adhesive holding strength at the same time.

[0158] Comparative Example 2 and Example 4, the adhesive product prepared in Comparative Example 2 uses non-reactive tackifying resin GA-85 as the auxiliary agent A, and does not use auxiliary agent B, and although the adhesive product has good initial peel strength and low post-energization peel strength, the room temperature retention time is only 6 h, and the high temperature retention time is only 0.2 h, both of which are shorter than those of Example 4. In contrast, Example 4 uses reactive tackifying resin (resin of Formula II) as the auxiliary agent A, and polyurethane acrylate 6145-100 as the auxiliary agent B, and the adhesive product prepared has good initial peel strength and low post-energization peel strength, and at the same time, the room temperature retention time is 780 h, and the high temperature retention time is 780 h, and Example 4 has higher room temperature and high temperature bonding retention strength than Comparative Example 2, which shows that when the auxiliary agent A accounts for 10% to 30% of the total weight of the acrylate polymer, and the mass ratio of the auxiliary agent A to the auxiliary agent B is (10-30):(1-10), the auxiliary agent A and the auxiliary agent B can synergistically crosslink with the acrylate polymer, and can enable the adhesive layer formed by the electrically peelable composition to have high pre-energization peel strength, easy post-energization peelability, and at the same time, have higher bonding retention strength.

[0159] Comparative Example 3 and Example 4, although the reactive tackifying resin (resin of Formula II) is used as the auxiliary agent A in Comparative Example 3, the amount of the auxiliary agent A is too low, and the auxiliary agent A accounts for only 5% of the total weight of the acrylate polymer, and the mass ratio of the auxiliary agent A to the auxiliary agent B is 5:2, and the crosslinking effect of the auxiliary agent A and the auxiliary agent B participating in the crosslinking of the acrylate polymer is poor, and compared with A4, the adhesive layer formed by the electrically peelable composition B3 prepared in Comparative Example 3 has lower initial peel strength, which is only 0.6529 N / mm, is easy to peel off from the adherend, and the room temperature retention time is 480 h, and the high temperature retention time is only 480 h, both of which are shorter than those of Example 4. In contrast, Example 4 uses reactive tackifying resin (resin of Formula II) as the auxiliary agent A, and the auxiliary agent A accounts for 20% of the total weight of the acrylate polymer, and the mass ratio of the auxiliary agent A to the auxiliary agent B is 20:2, and the adhesive product prepared has good initial peel strength and low post-energization peel strength, and at the same time, the room temperature retention time is 780 h, and the high temperature retention time is 780 h, and Example 4 has higher room temperature and high temperature bonding retention strength than Comparative Example 3, which shows that when the auxiliary agent A accounts for 10% to 30% of the total weight of the acrylate polymer, and the mass ratio of the auxiliary agent A to the auxiliary agent B is (10-30):(1-10), the auxiliary agent A and the auxiliary agent B can synergistically crosslink with the acrylate polymer, and can enable the adhesive layer formed by the electrically peelable composition to have high pre-energization peel strength, easy post-energization peelability, and at the same time, have higher bonding retention strength.

[0160] Compared with Example 4, in Comparative Example 4, although the reactive tackifying resin (resin of Formula II) is used as the additive A, the amount of the additive A is too high, the additive A accounts for 40% of the total weight of the acrylate polymer, and the mass ratio of the additive A to the additive B is 40:2, so that the cohesive strength of the electrical release composition B4 is seriously attenuated, the initial peeling strength of the adhesive layer formed by the electrical release composition B4 is lower than that of A4, and is 0.7537 N / mm, and the peeling strength after power supply is higher, the adhesive layer cannot be easily peeled from the adherend, and the room temperature retention time is only 24 h and the high temperature retention time is only 10 h, which are shorter than those of Example 4.

[0161] Compared with Example 4, in Comparative Example 5, the polyurethane acrylate 6145-100 is used as the additive B, and no additive A is added, so that the adhesive product prepared has good initial peeling strength and low peeling strength after power supply, but the room temperature retention time is only 10 h and the high temperature retention time is only 2 h, which are shorter than those of Example 4.

[0162] Compared with Example 4, in Comparative Example 6, although the reactive tackifying resin (resin of Formula II) is used as the additive A, no additive B is added, so that the adhesive product prepared has good initial peeling strength and low peeling strength after power supply, but the room temperature retention time is only 20 h and the high temperature retention time is only 3 h, which are shorter than those of Example 4; in contrast, in Example 4, the UV-curable resin polyurethane acrylate 6145-100 is used as the additive B, so that the additive B and the acrylate polymer can be synergistically crosslinked, and Example 4 has higher room temperature and high temperature bonding retention strength than Comparative Example 6.

[0163] In Examples 5-9, the types and proportions of the acrylate polymer preparation monomers and the types and proportions of the remaining components are adjusted, so that the adhesive layer formed by the electrical release composition prepared has high peeling strength before power supply, easy peeling after power supply, and high bonding retention.

[0164] In summary, the electrical release composition provided in the examples of the present application is prepared by synergistic combination of the acrylate polymer, the ionic liquid, the additive A and the additive B, and the cohesive strength of the electrical release composition is significantly improved, the adhesive layer formed by the electrical release composition has high peeling strength and bonding retention before power supply, and is easy to be peeled from the adherend after power supply, so that the adhesive product prepared from the electrical release composition has the properties of easy peeling after power supply and excellent bonding performance.

[0165] The technical features described above can be combined in any manner. Although not all possible combinations of the technical features are described, any combination of the technical features should be considered to be covered by the present specification, as long as such a combination does not contradict.

[0166] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electrically strippable composition characterized in that, The composition comprises: an acrylate polymer, an ionic liquid, an auxiliary A, and an auxiliary B; The auxiliary A accounts for 10-30% of the total weight of the acrylate polymer; The mass ratio of the auxiliary A to the auxiliary B is (10-30):(1-10); The auxiliary A and the auxiliary B are used for synergistic crosslinking reaction with the acrylate polymer.

2. The electrical stripping composition according to claim 1, characterized in that, At least one of the following conditions A-H is met: A. In terms of weight parts, relative to 100 parts of the acrylate polymer, the ionic liquid accounts for 2-30 parts, the auxiliary A accounts for 10-30 parts, and the auxiliary B accounts for 1-10 parts in the components of the electrically peelable composition; B. The auxiliary A comprises a linear active functional group-containing resin, and the molecular weight thereof is 200-1000; C. The auxiliary B comprises a UV-curable resin and / or a non-UV-curable resin; D. The anion of the ionic liquid is bis(fluorosulfonyl)imide anion; E. The cation of the ionic liquid comprises at least one of nitrogen-containing onium cation, sulfur-containing onium cation, phosphorus-containing onium cation, imidazolium onium cation, ammonium cation, or pyridinium onium cation; F. The solid content of the acrylate polymer is 10-50%; G. The weight average molecular weight of the acrylate polymer is more than 100,000 and less than 5,000,000, preferably more than 200,000 and less than 4,000,000, and more preferably more than 300,000 and less than 3,000,000; H. The glass transition temperature of the acrylate polymer is 0°C or lower, preferably -20°C or lower, and more preferably -40°C or lower.

3. The electro-strippability composition according to claim 1, characterized in that, The auxiliary agent A includes at least one of a rosin carboxyl-containing tackifying resin, an epoxy-containing epoxy-containing tackifying resin, a phenol hydroxyl-containing tackifying resin, an acrylate tackifying resin, and a resin represented by Formula I, Formula II, and Formula III below, R1 represents a phenyl group, a cyclohexyl group, or a methylene group, R2 represents a methyl group, a hydroxyl group, a vinyl group, a carboxyl group, an epoxy group, a mercapto group, or an acryloyloxy group, and R represents a methyl group, a hydroxyl group, a vinyl group, a carboxyl group, an epoxy group, a mercapto group, or an acryloyloxy group.

4. The electro-strippability composition according to claim 2, characterized in that, When the auxiliary B is a non-UV-curable resin, at least one of the following is included: an isocyanate crosslinking agent, an epoxy crosslinking agent, an aziridine crosslinking agent, or a metal chelate crosslinking agent; or When the auxiliary B is a UV-curable resin, at least one of the following is included: an epoxy acrylate, a polyurethane acrylate, or a polyester acrylate.

5. The electro-strippability composition according to claim 1, characterized in that, The acrylate polymer is made of a main unit, a functional unit, and an initiator as main raw materials; The main unit is an alkyl (meth)acrylate containing an alkyl group with 1-14 carbon atoms; The functional unit includes a carboxyl-containing acrylate monomer and / or a hydroxyl-containing acrylate monomer; The initiator includes any one of a polymerization thermal initiator and a polymerization photoinitiator.

6. The electro-strippability composition according to claim 5, characterized in that, One or more of the following conditions I-M is met: I. When the initiator is a polymerization thermal initiator, the mass ratio of the main unit to the functional unit is (70-95):(5-30); J. When the initiator is a polymerization photoinitiator, the raw materials of the acrylate polymer further include a multifunctional UV monomer; the mass ratio of the main unit, the functional unit, and the multifunctional UV monomer is (60-95):(3-30):(2-10); K, the raw material of the acrylic ester polymer further comprises a polymerization solvent, the polymerization solvent comprises at least one of aliphatic hydrocarbons, ester compounds and aromatic hydrocarbons; L, the polymerization thermal initiator comprises any one of azo polymerization initiators 2,2'-azobis isobutyronitrile, 2,2'-azobis (2-methylpropylamidine) disulfide, 2,2'-azobis (4-methoxy-2, 4-dimethyl valeronitrile), 2,2'-azobis (2, 4-dimethyl valeronitrile), 2,2'-azobis (2-methyl butyronitrile), 1,1'-azobis (cyclohexane-1-carbonitrile), 2,2'-azobis (2, 4, 4-trimethyl pentane), dimethyl-2, 2'-azobis (2-methyl propionic acid ester), 2,2'-azobis [2-methyl-N- (phenylmethyl) -propylamidine] dihydrochloride, 2,2'-azobis [2- (3, 4, 5, 6-tetrahydropyrimidine-2-yl) propane] dihydrochloride or 2,2'-azobis [2- (2-imidazoline-2-yl) propane], or any one of persulfate compounds potassium persulfate or ammonium persulfate; M, the polymerization photoinitiator comprises any one of type I photoinitiators hydroxypropiophenone, alkylaminoacetophenone, benzoin ether or phosphine oxide, or any one of type II initiators benzophenone, substituted benzophenone, anthraquinone, benzoyl formate, camphorquinone or thioxanthone.

7. A method for producing the electrostrippable composition according to any one of claims 1 to 6, characterized by, Comprise: The acrylic ester polymer preparation step: the monomer mixture A composed of the main unit, the functional unit and the polymerization solvent are mixed with the polymerization thermal initiator at a certain proportion, and the acrylic ester polymer A is obtained; or, the monomer mixture B composed of the main unit, the functional unit, the multifunctional UV monomer and the polymerization solvent are mixed with the polymerization photoinitiator at a certain proportion, and the acrylic ester polymer B is obtained; The electrical stripping composition preparation step: the acrylic ester polymer A or the acrylic ester polymer B is mixed with the remaining components at a certain proportion, and the electrical stripping composition is obtained.

8. The method for producing the electrical stripping composition according to claim 7, characterized by, The acrylic ester polymer preparation step specifically comprises: The monomer mixture A composed of the main unit and the functional unit is mixed with the polymerization solvent at a mass ratio of 1: (1-9), and the polymerization thermal initiator is added at 0.2-1% of the mass percentage of the monomer mixture A, and the acrylic ester polymer A is obtained by heating reaction; or, The monomer mixture B composed of the main unit, the functional unit and the multifunctional UV monomer is mixed with the polymerization solvent at a mass ratio of 1: (1-9), and the polymerization photoinitiator is added at 1-5% of the mass percentage of the monomer mixture B, and the acrylic ester polymer B is obtained by reaction under UV light.

9. The method for producing the electrical stripping composition according to claim 7, characterized by, In the electrical stripping composition preparation step, when the acrylic ester polymer B is mixed with the remaining components at a certain proportion, the remaining components further comprise 1-5% of the total mass of the acrylic ester polymer B of the polymerization photoinitiator.

10. An adhesive article characterized by, The adhesive layer is prepared by the electrical stripping composition prepared by the preparation method of any one of claims 1-6 or any one of claims 7-9.

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