A degradable mobile phone adhesive material and its preparation process

Abstract

The present invention belongs to the field of adhesive technology and specifically relates to a degradable mobile phone adhesive material and a preparation process thereof. The degradable mobile phone adhesive material comprises, by weight, 45-60 parts of a bio-based methacrylate monomer, 5-10 parts of a tackifying resin, 3-8 parts of vinylethoxyethyl acrylate, 3-8 parts of 4-hydroxybutyl acrylate, 2-5 parts of a modified monomer A, 2-5 parts of a modified monomer B, 0.1-2 parts of an initiator, and 60-80 parts of a solvent; the modified monomer A contains a disulfide bond and a double bond; the modified monomer B contains a borate bond and a double bond. The present invention introduces dynamic disulfide bonds and borate bonds between polyacrylate molecular chains. These two dynamic bonds form a hierarchical energy-consuming network, resulting in a degradable mobile phone adhesive material that is both degradable and has excellent creep recovery.

Description

Technical Field

[0001] The invention belongs to the technical field of adhesives, and in particular relates to a degradable mobile phone adhesive material and a preparation process thereof. Background Art

[0002] The adhesive on the back of the phone that fixes the back cover of the phone can prevent the back cover of the phone from falling off due to external force or vibration, and block pollutants such as dust and water vapor from entering the phone, thereby protecting the electronic components.

[0003] At present, commonly used mobile phone adhesives mainly include hot melt adhesive-based adhesives and double-sided foam pressure-sensitive adhesives. For example, the Chinese patent with authorization publication number CN 113462346 B in the prior art discloses a UV / moisture dual-curing polyurethane hot melt adhesive with high initial adhesion and excellent drop resistance, as well as its preparation method and application. The adhesive comprises the following components by weight percentage: 15-18 parts of 4,4-diphenylmethane diisocyanate, 12-20 parts of crystalline polyester diol, 7-13 parts of semi-crystalline polyester diol, 30-45 parts of flexible polyether diol, 2-6 parts of EVA rubber, 10-15 parts of acrylic resin, 0.8-1.8 parts of hydroxy acrylate, 0.8-1.5 parts of photoinitiator, 0.2-0.4 parts of catalyst, 0.1-0.2 parts of antioxidant, and 0.01-0.02 parts of stabilizer. This technical solution combines UV light curing and moisture curing, adding rubber and acrylic resin to achieve high initial adhesion and excellent drop resistance. Chinese Patent Publication No. CN 117511442 A discloses a PE foam double-sided adhesive for bonding mobile phone back covers to midframes. The PE foam double-sided adhesive comprises a first acrylic pressure-sensitive adhesive layer, a PE foam layer, and a second acrylic pressure-sensitive adhesive layer. The first and second acrylic pressure-sensitive adhesive layers are made from the following components by weight: 70-80% acrylic adhesive, 10-20% styrene-modified terpene-phenol resin, 5-8% nano-montmorillonite, and 1-2% curing agent. The styrene content of the styrene-modified terpene-phenol resin is 15-25%. The PE foam double-sided adhesive of this technical solution exhibits excellent bonding properties, high and low temperature resistance, and sustained adhesion.

[0004] However, all of the above technical solutions rely on traditional polymer materials, which are not biodegradable. Furthermore, in recent years, foldable phones have attracted an increasing number of consumers, and demand in the mobile phone market has continued to rise. The back covers of foldable phones are squeezed against each other due to repeated folding, generating extrusion stress that can easily cause the back covers to warp or separate. Therefore, it is of great significance to provide a biodegradable adhesive material for mobile phone backings that can be used in foldable phones. Summary of the Invention

[0005] The present invention provides a degradable mobile phone adhesive material and a preparation process thereof, in view of the fact that the mobile phone adhesive in the prior art does not have shell degradability and does not pay attention to the particularity of the mobile phone adhesive of folding screen mobile phones. The present invention introduces dynamic disulfide bonds and borate bonds between polyacrylate molecular chains. These two dynamic bonds form a hierarchical energy-consuming network. The obtained degradable mobile phone adhesive material has degradability and excellent creep recovery rate.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] The first aspect of the present invention provides a degradable mobile phone adhesive material. The raw materials include, by weight: 45-60 parts of a bio-based methacrylate monomer, 5-10 parts of a tackifying resin, 3-8 parts of vinyl ethoxyethyl acrylate, 3-8 parts of 4-hydroxybutyl acrylate, 2-5 parts of a modified monomer A, 2-5 parts of a modified monomer B, 0.1-2 parts of an initiator, and 60-80 parts of a solvent. The modified monomer A contains a disulfide bond and a double bond; and the modified monomer B contains a borate ester bond and a double bond.

[0008] In some preferred embodiments, the bio-based methacrylate monomer comprises tridecyl methacrylate, isobornyl acrylate and tetrahydrofuranyl methacrylate in a mass ratio of 8-15:1-2:1.

[0009] In some preferred embodiments, the bio-based methacrylate monomer comprises tridecyl methacrylate, isobornyl acrylate and tetrahydrofuranyl methacrylate in a mass ratio of 10-12:1:1.

[0010] The present invention uses bio-based tridecyl methacrylate as a main monomer. Its long alkyl chain imparts mobility to the polyacrylate molecular chain, lowering the glass transition temperature. The copolymerization is carried out with isobornyl acrylate, tetrahydrofuran methacrylate, vinylethoxyethyl acrylate, 4-hydroxybutyl acrylate, and modified monomers A and B. It is found that by controlling the mass ratio of tridecyl methacrylate, isobornyl acrylate, and tetrahydrofuran methacrylate, the copolymerization with vinylethoxyethyl acrylate can form a polymer with a low storage modulus at low temperature, a high storage modulus at high temperature, and good adhesion to the substrate. The obtained degradable mobile phone adhesive material has excellent peel strength with 3D glass and PC boards, and can withstand 100 high and low temperature cycle tests and 200 drop tests.

[0011] In some preferred embodiments, the tackifying resin is rosin resin.

[0012] In some preferred embodiments, the modified monomer A is obtained by reacting ethyl isocyanate acrylate and 2,2'-dithiodiethylamine.

[0013] In some preferred embodiments, the preparation method of the modified monomer A is as follows: under nitrogen protection, isocyanate ethyl acrylate, 2,2'-dithiodiethylamine and N,N-dimethylformamide are mixed, reacted at 30-40° C. until the isocyanate group disappears, and N,N-dimethylformamide is removed to obtain the modified monomer A.

[0014] In some preferred embodiments, the mass ratio of the isocyanate ethyl acrylate, 2,2'-dithiodiethylamine and N,N-dimethylformamide is 1.8-1.9:1:20-30, preferably 1.85:1:25.

[0015] In some preferred embodiments, the modified monomer B is obtained by reacting 1,4-phenylenediboronic acid, 2-amino-1,3-propanediol and ethyl isocyanate acrylate.

[0016] In some preferred embodiments, the preparation method of the modified monomer B is: 1,4-phenylenediboronic acid, 2-amino-1,3-propanediol and tetrahydrofuran are mixed, reacted at 20-30°C for 20-24 hours, filtered after the reaction is completed, and dried to obtain an intermediate product; under nitrogen protection, the intermediate product, ethyl isocyanate acrylate and tetrahydrofuran are mixed, reacted at 20-30°C until the isocyanate group disappears, and the tetrahydrofuran is removed to obtain the intermediate product.

[0017] In some preferred embodiments, the mass ratio of 1,4-phenylenediboronic acid, 2-amino-1,3-propanediol and tetrahydrofuran is 1.5-1.6:1:30-40, preferably 1.55:1:35.

[0018] In some preferred embodiments, the mass ratio of the 2-amino-1,3-propanediol to the isocyanate ethyl acrylate is 1:3-3.2, preferably 1:3.1.

[0019] In some preferred embodiments, the mass ratio of the intermediate product to tetrahydrofuran is 1:10-20, preferably 1:15.

[0020] The back covers of foldable screen phones are squeezed against each other due to repeated folding, generating extrusion stress, which can easily cause the back covers to warp or separate. To solve the above problems, the present invention uses isocyanate ethyl acrylate and 2,2'-dithiodiethylamine to react to obtain a modified monomer A containing double bonds and disulfide bonds; 1,4-phenylenediboronic acid, 2-amino-1,3-propanediol and isocyanate ethyl acrylate are reacted to obtain a modified monomer B containing double bonds and borate bonds, which is copolymerized with bio-based methacrylate monomers, vinylethoxyethyl acrylate and 4-hydroxybutyl acrylate. Under the action of an initiator, dynamic disulfide bonds and borate bonds are introduced between the polyacrylate molecular chains. These two dynamic bonds form a hierarchical energy dissipation network. The resulting degradable mobile phone adhesive material has excellent creep recovery rate, thereby preventing the extrusion stress generated by the mutual squeezing of the mobile phone back covers from affecting the fixation of the back covers.

[0021] In some preferred embodiments, the initiator is selected from at least one of azobisisobutyronitrile, azobisisoheptanenitrile, benzoyl peroxide, lauroyl peroxide, and tert-butyl perbenzoate.

[0022] In some preferred embodiments, the solvent is selected from at least one of ethyl acetate, butyl acetate, propyl acetate, ethyl propionate, and butanone.

[0023] The second aspect of the present invention provides a preparation process for a degradable mobile phone adhesive material, comprising the following steps: adding a bio-based methacrylate monomer, vinyl ethoxyethyl acrylate, 4-hydroxybutyl acrylate, modified monomer A, and modified monomer B to a solvent; adding an initiator and a tackifying resin under nitrogen protection; and stirring and reacting at 65-75°C for 4-7 hours to obtain the product.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention utilizes the reaction of ethyl isocyanate acrylate and 2,2'-dithiodiethylamine to obtain a modified monomer A containing a double bond and a disulfide bond; utilizes the reaction of 1,4-phenylenediboronic acid, 2-amino-1,3-propanediol and ethyl isocyanate acrylate to obtain a modified monomer B containing a double bond and a borate bond, and introduces dynamic disulfide bonds and borate bonds between polyacrylate molecular chains. The obtained degradable mobile phone adhesive material has both degradability and excellent creep recovery rate.

[0026] 2. The present invention controls the mass ratio of tridecyl methacrylate, isobornyl acrylate and tetrahydrofuran methacrylate to copolymerize with vinyl ethoxyethyl acrylate. The obtained degradable mobile phone adhesive material has excellent peel strength with 3D glass and PC board, and can withstand 100 high and low temperature cycle tests and 200 drop tests. DETAILED DESCRIPTION

[0027] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, a specific implementation scheme is now described in detail.

[0028] The present invention is further described below with reference to the following examples, but the present invention is not limited to the following examples. The implementation conditions used in the examples can be further adjusted according to the specific requirements of different applications. The implementation conditions not specified are conventional conditions in the industry. The technical features involved in the various embodiments of the present invention may be combined with each other as long as they do not conflict with each other.

[0029] In the following examples and comparative examples, unless otherwise specified, all raw materials used were commercially available or prepared by conventional methods in the art.

[0030] Tridecyl methacrylate, isobornyl acrylate, and tetrahydrofuranyl methacrylate were purchased from Evonik Specialty Chemicals (Shanghai) Co., Ltd.;

[0031] Rosin resin was purchased from Shenzhen Jitian Chemical Co., Ltd., product number: BZ04;

[0032] Ethyl isocyanate acrylate was purchased from Zhangjiagang Top Chemical Co., Ltd.

[0033] Example 1

[0034] A degradable mobile phone adhesive material comprises, by weight, 45 parts of bio-based methacrylate monomer, 5 parts of tackifying resin, 3 parts of vinyl ethoxyethyl acrylate, 3 parts of 4-hydroxybutyl acrylate, 2 parts of modified monomer A, 2 parts of modified monomer B, 0.5 part of initiator, and 60 parts of solvent.

[0035] The bio-based methacrylate monomer consists of tridecyl methacrylate, isobornyl acrylate and tetrahydrofuran methacrylate in a mass ratio of 10:1:1.

[0036] The tackifying resin is rosin resin.

[0037] The preparation method of the modified monomer A is as follows: under nitrogen protection, isocyanate ethyl acrylate, 2,2'-dithiodiethylamine and N,N-dimethylformamide are mixed, reacted at 30° C. until the isocyanate group disappears, and N,N-dimethylformamide is removed to obtain the modified monomer A.

[0038] The mass ratio of the isocyanate ethyl acrylate, 2,2'-dithiodiethylamine and N,N-dimethylformamide is 1.85:1:25.

[0039] The preparation method of the modified monomer B is as follows: 1,4-phenylenediboronic acid, 2-amino-1,3-propanediol and tetrahydrofuran are mixed, reacted at 25° C. for 24 hours, filtered after the reaction is completed, and dried to obtain an intermediate product; under nitrogen protection, the intermediate product, ethyl isocyanate acrylate and tetrahydrofuran are mixed, reacted at 20° C. until the isocyanate group disappears, and the tetrahydrofuran is removed to obtain the modified monomer B.

[0040] The mass ratio of the 1,4-phenylenediboronic acid, 2-amino-1,3-propanediol and tetrahydrofuran is 1.55:1:35.

[0041] The mass ratio of the 2-amino-1,3-propylene glycol to the isocyanate ethyl acrylate is 1:3.1.

[0042] The mass ratio of the intermediate product to tetrahydrofuran is 1:15.

[0043] The initiator is benzoyl peroxide.

[0044] The solvent is ethyl acetate.

[0045] The preparation process of the above-mentioned degradable mobile phone adhesive material is as follows: bio-based methacrylate monomer, vinyl ethoxyethyl acrylate, 4-hydroxybutyl acrylate, modified monomer A, and modified monomer B are added to a solvent, and under nitrogen protection, an initiator and a tackifying resin are added, and the reaction is stirred at 70°C for 5 hours to obtain the product.

[0046] Example 2

[0047] A degradable mobile phone adhesive material comprises, by weight, 55 parts of bio-based methacrylate monomer, 8 parts of tackifying resin, 5 parts of vinyl ethoxyethyl acrylate, 5 parts of 4-hydroxybutyl acrylate, 3 parts of modified monomer A, 3 parts of modified monomer B, 1.5 parts of initiator, and 70 parts of solvent.

[0048] The bio-based methacrylate monomer consists of tridecyl methacrylate, isobornyl acrylate and tetrahydrofuran methacrylate in a mass ratio of 10:1:1.

[0049] The tackifying resin is rosin resin.

[0050] The preparation method of the modified monomer A is as follows: under nitrogen protection, isocyanate ethyl acrylate, 2,2'-dithiodiethylamine and N,N-dimethylformamide are mixed, reacted at 30° C. until the isocyanate group disappears, and N,N-dimethylformamide is removed to obtain the modified monomer A.

[0051] The mass ratio of the isocyanate ethyl acrylate, 2,2'-dithiodiethylamine and N,N-dimethylformamide is 1.85:1:25.

[0052] The preparation method of the modified monomer B is as follows: 1,4-phenylenediboronic acid, 2-amino-1,3-propanediol and tetrahydrofuran are mixed, reacted at 25° C. for 24 hours, filtered after the reaction is completed, and dried to obtain an intermediate product; under nitrogen protection, the intermediate product, ethyl isocyanate acrylate and tetrahydrofuran are mixed, reacted at 20° C. until the isocyanate group disappears, and the tetrahydrofuran is removed to obtain the modified monomer B.

[0053] The mass ratio of the 1,4-phenylenediboronic acid, 2-amino-1,3-propanediol and tetrahydrofuran is 1.55:1:35.

[0054] The mass ratio of the 2-amino-1,3-propylene glycol to the isocyanate ethyl acrylate is 1:3.1.

[0055] The mass ratio of the intermediate product to tetrahydrofuran is 1:15.

[0056] The initiator is benzoyl peroxide.

[0057] The solvent is ethyl acetate.

[0058] The preparation process of the above-mentioned degradable mobile phone adhesive material is as follows: bio-based methacrylate monomer, vinyl ethoxyethyl acrylate, 4-hydroxybutyl acrylate, modified monomer A, and modified monomer B are added to a solvent, and under nitrogen protection, an initiator and a tackifying resin are added, and the reaction is stirred at 70°C for 5 hours to obtain the product.

[0059] Example 3

[0060] A biodegradable mobile phone adhesive material, comprising, by weight, 60 parts of a bio-based methacrylate monomer, 10 parts of a tackifying resin, 8 parts of vinylethoxyethyl acrylate, 8 parts of 4-hydroxybutyl acrylate, 5 parts of a modified monomer A, 5 parts of a modified monomer B, 2 parts of an initiator, and 80 parts of a solvent.

[0061] The bio-based methacrylate monomer consists of tridecyl methacrylate, isobornyl acrylate and tetrahydrofuran methacrylate in a mass ratio of 10:1:1.

[0062] The tackifying resin is rosin resin.

[0063] The preparation method of the modified monomer A is as follows: under nitrogen protection, isocyanate ethyl acrylate, 2,2'-dithiodiethylamine and N,N-dimethylformamide are mixed, reacted at 30° C. until the isocyanate group disappears, and N,N-dimethylformamide is removed to obtain the modified monomer A.

[0064] The mass ratio of the isocyanate ethyl acrylate, 2,2'-dithiodiethylamine and N,N-dimethylformamide is 1.85:1:25.

[0065] The preparation method of the modified monomer B is as follows: 1,4-phenylenediboronic acid, 2-amino-1,3-propanediol and tetrahydrofuran are mixed, reacted at 25° C. for 24 hours, filtered after the reaction is completed, and dried to obtain an intermediate product; under nitrogen protection, the intermediate product, ethyl isocyanate acrylate and tetrahydrofuran are mixed, reacted at 20° C. until the isocyanate group disappears, and the tetrahydrofuran is removed to obtain the modified monomer B.

[0066] The mass ratio of the 1,4-phenylenediboronic acid, 2-amino-1,3-propanediol and tetrahydrofuran is 1.55:1:35.

[0067] The mass ratio of the 2-amino-1,3-propylene glycol to the isocyanate ethyl acrylate is 1:3.1.

[0068] The mass ratio of the intermediate product to tetrahydrofuran is 1:15.

[0069] The initiator is benzoyl peroxide.

[0070] The solvent is ethyl acetate.

[0071] The preparation process of the above-mentioned degradable mobile phone adhesive material is as follows: bio-based methacrylate monomer, vinyl ethoxyethyl acrylate, 4-hydroxybutyl acrylate, modified monomer A, and modified monomer B are added to a solvent, and under nitrogen protection, an initiator and a tackifying resin are added, and the reaction is stirred at 70°C for 5 hours to obtain the product.

[0072] Example 4

[0073] A degradable mobile phone adhesive material is different from Example 2 only in that the bio-based methacrylate monomer is composed of tridecyl methacrylate, isobornyl acrylate and tetrahydrofuran methacrylate in a mass ratio of 12:1:1; the rest are the same.

[0074] Example 5

[0075] A degradable mobile phone adhesive material is different from Example 2 only in that the bio-based methacrylate monomer is composed of tridecyl methacrylate, isobornyl acrylate and tetrahydrofuran methacrylate in a mass ratio of 15:1:1; the rest are the same.

[0076] Example 6

[0077] A degradable mobile phone adhesive material is different from Example 2 only in that the bio-based methacrylate monomer is composed of tridecyl methacrylate, isobornyl acrylate and tetrahydrofuran methacrylate in a mass ratio of 8:1:1; the rest are the same.

[0078] Comparative Example 1

[0079] A degradable mobile phone adhesive material is different from Example 2 only in that vinyl ethoxyethyl acrylate is replaced by methoxy polyethylene glycol 400 acrylate of equal mass; the rest are the same.

[0080] Comparative Example 2

[0081] A degradable mobile phone adhesive material is different from Example 2 only in that the modified monomer A is replaced by a modified monomer B of the same mass; the rest are the same.

[0082] Comparative Example 3

[0083] A degradable mobile phone adhesive material is different from Example 2 only in that the modified monomer B is replaced by the modified monomer A of the same mass; the rest are the same.

[0084] Comparative Example 4

[0085] A degradable mobile phone adhesive material differs from Example 2 only in that, by weight, the raw materials consist of 61 parts of a bio-based methacrylate monomer, 8 parts of a tackifying resin, 5 parts of vinyl ethoxyethyl acrylate, 5 parts of 4-hydroxybutyl acrylate, 1.5 parts of an initiator, and 70 parts of a solvent; the rest are the same.

[0086] The preparation process of the above-mentioned degradable mobile phone adhesive material is as follows: bio-based methacrylate monomer, vinyl ethoxyethyl acrylate, and 4-hydroxybutyl acrylate are added to a solvent, and under nitrogen protection, an initiator and a tackifying resin are added, and the mixture is stirred and reacted at 70°C for 5 hours to obtain the product.

[0087] Test Example 1

[0088] The creep recovery test of the mobile phone adhesive materials prepared in Examples 1-6 and Comparative Examples 1-4 was performed using a rheological tester: the temperatures were -20°C, 25°C and 60°C, the stress was 10 kPa, the duration was 10 min, and then naturally cooled, the stress was 0 Pa, and the duration was 10 min.

[0089] Test Example 2

[0090] The mobile phone adhesive material prepared in Examples 1-6 and Comparative Examples 1-4 was applied to the upper surface of the PE foam layer to form a first pressure-sensitive adhesive layer, and the upper surface of the first pressure-sensitive adhesive layer was covered with release paper. The mobile phone adhesive material prepared in Examples 1-6 and Comparative Examples 1-4 was applied to the lower surface of the PE foam layer to form a second pressure-sensitive adhesive layer to obtain a PE foam double-sided adhesive tape. The thickness of the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer were both 20 μm. The thickness of the PE foam layer was 1000 μm. The following performance tests were performed on the PE foam double-sided adhesive tape:

[0091] (1) 180° peel strength: Refer to ASTM D-3330 standard, the test substrates are PC board and 3D glass board.

[0092] (2) High and low temperature cycle test: Use PE foam double-sided tape to bond the PC board and 3D glass board, and perform high and low temperature cycle test under the conditions of -40℃, 1h→25℃, 1h→70℃, 1h. After 100 cycles, observe whether the PC board and 3D glass board are still firmly bonded. If there is no obvious warping or separation, it is marked as qualified, otherwise it is marked as unqualified.

[0093] (3) Drop test: Use PE foam double-sided tape to bond the PC board and 3D glass board, and perform a drop test from a horizontal height of 1m. After 200 cycles, observe whether the PC board and 3D glass board are still firmly bonded. If there is no obvious warping or separation, it is considered qualified; otherwise, it is considered unqualified.

[0094] Test results:

[0095] Table 1

[0096]

[0097] It can be seen from Table 1 that the degradable mobile phone adhesive materials of Examples 1-6 of the present invention have good creep properties, good adhesion to PC boards and 3D glass boards, good high and low temperature cycling and drop resistance; however, the comprehensive effects of Examples 5 and 6 are lower than those of Examples 1-4, indicating that the ratio of tridecyl acrylate, isobornyl acrylate and tetrahydrofuran methacrylate will affect the performance of the degradable mobile phone adhesive material; in Comparative Example 1, vinyl ethoxyethyl acrylate is replaced with methoxy polyethylene glycol 400 acrylate of equal mass, and the molecular chain structure of the obtained degradable mobile phone adhesive material changes, the creep recovery rates at 25°C and 60°C decrease, and the high and low temperature cycling test fails. Comparative Example 2 only introduced borate bonds and lacked disulfide bonds; Comparative Example 3 only introduced disulfide bonds and lacked borate bonds; Comparative Example 4 had neither disulfide bonds nor borate bonds; the creep recovery rate of the obtained degradable mobile phone adhesive material was significantly poor, and it could not pass the high and low temperature cycle test and drop test. The peeling force between the degradable adhesive material of Comparative Example 4 and the PC board and 3D glass board was also significantly reduced.

[0098] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A degradable mobile phone adhesive material, characterized in that: The raw materials include, by weight: 45-60 parts of bio-based methacrylate monomer, 5-10 parts of tackifying resin, 3-8 parts of vinyl ethoxyethyl acrylate, 3-8 parts of 4-hydroxybutyl acrylate, 2-5 parts of modified monomer A, 2-5 parts of modified monomer B, 0.1-2 parts of initiator, and 60-80 parts of solvent; The bio-based methacrylate monomers include tridecyl methacrylate, isobornyl acrylate and tetrahydrofuranyl methacrylate in a mass ratio of 8-15:1-2:1; The preparation method of modified monomer A is as follows: under nitrogen protection, ethyl isocyanate acrylate, 2,2'-dithiodiethylamine and N,N-dimethylformamide are mixed, reacted at 30-40°C until the isocyanate group disappears, and N,N-dimethylformamide is removed to obtain the modified monomer A; The mass ratio of ethyl isocyanate acrylate, 2,2'-dithiodiethylamine and N,N-dimethylformamide is 1.8-1.9:1:20-30; The preparation method of modified monomer B is as follows: 1,4-phenylenediboronic acid, 2-amino-1,3-propanediol and tetrahydrofuran are mixed, reacted at 20-30°C for 20-24 hours, filtered after the reaction, and dried to obtain an intermediate product; under nitrogen protection, the intermediate product, ethyl isocyanate acrylate and tetrahydrofuran are mixed, reacted at 20-30°C until the isocyanate group disappears, and the tetrahydrofuran is removed to obtain the product; The mass ratio of 1,4-phenylenediboronic acid, 2-amino-1,3-propylene glycol and tetrahydrofuran is 1.5-1.6:1:30-40; the mass ratio of 2-amino-1,3-propylene glycol and isocyanate ethyl acrylate is 1:3-3.

2.

2. The degradable mobile phone adhesive material according to claim 1, characterized in that: The bio-based methacrylate monomer comprises tridecyl methacrylate, isobornyl acrylate and tetrahydrofuran methacrylate in a mass ratio of 10-12:1:

1.

3. The preparation process of the degradable mobile phone adhesive material according to any one of claims 1 to 2, characterized in that: The following steps are involved: Add bio-based methacrylate monomer, vinyl ethoxyethyl acrylate, 4-hydroxybutyl acrylate, modified monomer A, and modified monomer B into a solvent, and then add an initiator and a tackifying resin under nitrogen protection, and stir and react at 65-75° C. for 4-7 hours to obtain the product.

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