Degradable mobile phone gum material and preparation process thereof

Abstract

The invention belongs to the technical field of adhesives, and particularly relates to a degradable mobile phone gum material and a preparation process thereof. The degradable mobile phone gum material is prepared from the following raw materials in parts by weight: 45 to 60 parts of bio-based methacrylate monomer, 5 to 10 parts of tackifying resin, 3 to 8 parts of vinyl ethoxyethyl acrylate, 3 to 8 parts of 4-hydroxybutyl acrylate, 2 to 5 parts of modified monomer A, 2 to 5 parts of modified monomer B, 0.1 to 2 parts of initiator and 60 to 80 parts of solvent, the modified monomer A contains a disulfide bond and a double bond; the modified monomer B contains a boric acid ester bond and a double bond. Dynamic disulfide bonds and boric acid ester bonds are introduced between polyacrylate molecular chains, the two dynamic bonds form a graded energy dissipation network, and the obtained degradable mobile phone back adhesive material is degradable and has an excellent creep recovery rate at the same time.

Description

Technical Field

[0001] The present invention belongs to the technical field of adhesives, and particularly relates to a degradable mobile phone back glue material and a preparation process thereof. Background Art

[0002] The mobile phone back glue for fixing the mobile phone back cover can prevent the back cover from falling off due to external force or vibration, and block pollutants such as dust and water vapor from entering the mobile phone interior, thereby protecting electronic components.

[0003] Currently, the commonly used mobile phone back glue mainly includes hot melt adhesive-based back glue and double-sided foam pressure-sensitive adhesive. For example, the Chinese patent with the authorized 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 and its preparation method and application, which includes the following components by weight percentage: 15-18 parts of 4,4ˋ-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 hydroxyacrylate, 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, and adds rubber and acrylic resin to achieve high initial adhesion and excellent drop resistance. The Chinese patent with the publication number CN 117511442 A discloses a PE foam double-sided tape for bonding and fixing the mobile phone back cover and the middle frame. The PE foam double-sided tape includes a first acrylic pressure-sensitive adhesive layer, a PE foam layer, and a second acrylic pressure-sensitive adhesive layer. The first acrylic pressure-sensitive adhesive layer and the second acrylic pressure-sensitive adhesive layer are prepared from the following components by weight percentage: 70-80% of acrylic adhesive, 10-20% of styrene-modified terpene phenol resin, 5-8% of nano-montmorillonite, and 1-2% of curing agent; the content of styrene in the styrene-modified terpene phenol resin is 15-25%. The PE foam double-sided tape of this technical solution has good bonding performance, high and low temperature resistance, and holding viscosity.

[0004] However, the above technical solutions all rely on traditional polymer materials and are not degradable. In addition, in recent years, folding screen mobile phones have attracted more and more consumers, and the demand in the mobile phone market is continuously rising. The back covers of folding screen mobile phones will be squeezed against each other due to repeated folding, generating extrusion stress, which is likely to cause the back cover to warp or separate. Therefore, it is of great significance to provide a degradable mobile phone back glue material that can be used for folding screen mobile phones. Summary of the Invention

[0005] The present invention provides a degradable mobile phone back glue material and its preparation process in view of the non-degradability of the existing mobile phone back glue in the prior art and the special nature of the mobile phone back glue for folding screen mobile phones. The present invention introduces dynamic disulfide bonds and borate ester bonds into the polyacrylate molecular chain. These two dynamic bonds form a hierarchical energy-consuming network, and the obtained degradable mobile phone back glue material has degradability and excellent creep recovery rate at the same time.

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

[0007] In the first aspect of the present invention, a degradable mobile phone back glue material is provided. By weight, the raw materials include: 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 modified monomer A contains a disulfide bond and a double bond; the modified monomer B contains a borate ester bond and a double bond.

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

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

[0010] The present invention uses bio-based tridecyl methacrylate as the main monomer. Its long alkyl chain endows the polyacrylate molecular chain with mobility and reduces the glass transition temperature. Copolymerization is carried out with isobornyl acrylate, tetrahydrofurfuryl methacrylate, vinyl ethoxyethyl acrylate, 4-hydroxybutyl acrylate, and modified monomer A and modified monomer B. It is found that by controlling the mass ratio of tridecyl methacrylate, isobornyl acrylate, and tetrahydrofurfuryl methacrylate to carry out copolymerization with vinyl ethoxyethyl acrylate, a polymer with a lower storage modulus at low temperature, a higher storage modulus at high temperature, and good adhesion to the substrate is formed. The obtained degradable mobile phone back glue material has excellent peel strength with both 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 with 2,2'-dithiobis(ethylamine).

[0013] In some preferred embodiments, the preparation method of the modified monomer A is as follows: Under nitrogen protection, ethyl isocyanate acrylate, 2,2'-dithiobis(ethylamine), and N,N-dimethylformamide are mixed and reacted at 30-40 °C until the isocyanate groups disappear, and then N,N-dimethylformamide is removed to obtain the product.

[0014] In some preferred embodiments, the mass ratio of ethyl isocyanate acrylate, 2,2'-dithiobis(ethylamine), 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-benzenediboronic acid, 2-amino-1,3-propanediol, and ethyl isocyanate acrylate.

[0016] In some preferred embodiments, the preparation method of the modified monomer B is as follows: 1,4-benzenediboronic acid, 2-amino-1,3-propanediol, and tetrahydrofuran are mixed and reacted at 20-30 °C for 20-24 h. After the reaction is completed, the mixture is filtered and dried to obtain an intermediate product. Under nitrogen protection, the intermediate product, ethyl isocyanate acrylate, and tetrahydrofuran are mixed and reacted at 20-30 °C until the isocyanate groups disappear, and then tetrahydrofuran is removed to obtain the product.

[0017] In some preferred embodiments, the mass ratio of 1,4-benzenediboronic 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 2-amino-1,3-propanediol to ethyl isocyanate 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 cover of a foldable screen mobile phone will be squeezed against each other due to repeated folding, generating extrusion stress, which is likely to cause the back cover to warp or separate. To solve the above problems, the present invention uses ethyl isocyanate acrylate and 2,2'-dithiobis(ethylamine) to react to obtain a modified monomer A containing double bonds and disulfide bonds; uses 1,4-benzenediboronic acid, 2-amino-1,3-propanediol and ethyl isocyanate acrylate to react to obtain a modified monomer B containing double bonds and borate ester bonds, and copolymerizes with a bio-based methacrylate monomer, vinyl ethoxyethyl acrylate and 4-hydroxybutyl acrylate. Under the action of an initiator, dynamic disulfide bonds and borate ester bonds are introduced between the molecular chains of polyacrylate. These two dynamic bonds form a hierarchical energy-consuming network, and the obtained degradable mobile phone back glue material has an excellent creep recovery rate, thereby avoiding the extrusion stress generated by the mutual extrusion of the mobile phone back cover from affecting the fixation of the back cover.

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

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

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

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

[0025] 1. The present invention uses ethyl isocyanate acrylate and 2,2'-dithiobis(ethylamine) to react to obtain a modified monomer A containing double bonds and disulfide bonds; uses 1,4-benzenediboronic acid, 2-amino-1,3-propanediol and ethyl isocyanate acrylate to react to obtain a modified monomer B containing double bonds and borate ester bonds, and introduces dynamic disulfide bonds and borate ester bonds between the molecular chains of polyacrylate. The obtained degradable mobile phone back glue material has degradability and an excellent creep recovery rate at the same time.

[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 back glue material has excellent peel strength with both 3D glass and PC boards and can withstand 100 high and low temperature cycle tests and 200 drop tests. Detailed implementation mode

[0027] For a clearer understanding of the technical features, objectives, and effects of the present invention, specific implementation embodiments are now described in detail.

[0028] The present invention will be further described below in conjunction with embodiments, but the present invention is not limited to the following embodiments. The implementation conditions adopted in the embodiments can be further adjusted according to different requirements of specific use, and the implementation conditions not specified are conventional conditions in the industry. The technical features involved in each implementation manner of the present invention can be combined with each other as long as they do not conflict with each other.

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

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

[0031] Rosin resin was purchased from Shenzhen Yitian 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 back adhesive material, by weight, the raw materials are composed of 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 is composed of tridecyl methacrylate, isobornyl acrylate, and tetrahydrofurfuryl 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, ethyl isocyanate acrylate, 2,2'-dithiobis(ethylamine), and N,N-dimethylformamide are mixed and reacted at 30°C until the isocyanate group disappears, and then N,N-dimethylformamide is removed to obtain it.

[0038] The mass ratio of ethyl isocyanate acrylate, 2,2'-dithiobis(ethylamine), and N,N-dimethylformamide is 1.85:1:25.

[0039] The preparation method of the modified monomer B is as follows: 1,4-benzenediboronic acid, 2-amino-1,3-propanediol and tetrahydrofuran are mixed and reacted at 25 °C for 24 h. After the reaction, filtration and drying are carried out to obtain an intermediate product. Under nitrogen protection, the intermediate product, isocyanate ethyl acrylate and tetrahydrofuran are mixed and reacted at 20 °C until the isocyanate group disappears, and then tetrahydrofuran is removed to obtain the product.

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

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

[0042] The mass ratio of the intermediate product and 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 back glue material is as follows: The bio-based methacrylate monomer, vinyl ethoxyethyl acrylate, 4-hydroxybutyl acrylate, modified monomer A and modified monomer B are added to the solvent. Under nitrogen protection, an initiator and a tackifying resin are added, and stirring reaction is carried out at 70 °C for 5 h to obtain the product.

[0046] Example 2

[0047] A degradable mobile phone back glue material, by weight, the raw materials are composed of 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 is composed of tridecyl methacrylate, isobornyl acrylate and tetrahydrofurfuryl methacrylate with 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'-dithiobis(ethylamine) and N,N-dimethylformamide are mixed and reacted at 30 °C until the isocyanate group disappears, and then N,N-dimethylformamide is removed to obtain the product.

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

[0052] The preparation method of the modified monomer B is as follows: 1,4-benzenediboronic acid, 2-amino-1,3-propanediol and tetrahydrofuran are mixed and reacted at 25 °C for 24 h. After the reaction, filtration and drying are carried out to obtain an intermediate product. Under nitrogen protection, the intermediate product, isocyanate ethyl acrylate and tetrahydrofuran are mixed and reacted at 20 °C until the isocyanate group disappears, and then tetrahydrofuran is removed to obtain the product.

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

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

[0055] The mass ratio of the intermediate product and 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 back glue material is as follows: The bio-based methacrylate monomer, vinyl ethoxyethyl acrylate, 4-hydroxybutyl acrylate, modified monomer A and modified monomer B are added to the solvent. Under nitrogen protection, an initiator and a tackifying resin are added, and stirring reaction is carried out at 70 °C for 5 h to obtain the product.

[0059] Example 3

[0060] A degradable mobile phone back glue material, by weight, the raw materials are composed of 60 parts of bio-based methacrylate monomer, 10 parts of tackifying resin, 8 parts of vinyl ethoxyethyl acrylate, 8 parts of 4-hydroxybutyl acrylate, 5 parts of modified monomer A, 5 parts of modified monomer B, 2 parts of initiator and 80 parts of solvent;

[0061] The bio-based methacrylate monomer is composed of tridecyl methacrylate, isobornyl acrylate and tetrahydrofuran methyl acrylate with 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'-dithiobis(ethylamine) and N,N-dimethylformamide are mixed and reacted at 30 °C until the isocyanate group disappears, and then N,N-dimethylformamide is removed to obtain the product.

[0064] The mass ratio of ethyl isocyanate acrylate, 2,2'-dithiobis(ethylamine), and N,N-dimethylformamide is 1.85:1:25.

[0065] The preparation method of the modified monomer B is as follows: 1,4-benzenediboronic acid, 2-amino-1,3-propanediol, and tetrahydrofuran are mixed and reacted at 25°C for 24 hours. After the reaction, filtration and drying are carried out to obtain an intermediate product. Under nitrogen protection, the intermediate product, ethyl isocyanate acrylate, and tetrahydrofuran are mixed and reacted at 20°C until the isocyanate groups disappear, and then tetrahydrofuran is removed to obtain the product.

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

[0067] The mass ratio of 2-amino-1,3-propanediol to ethyl isocyanate 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 back glue material is as follows: The bio-based methacrylate monomer, vinyl ethoxyethyl acrylate, 4-hydroxybutyl acrylate, modified monomer A, and modified monomer B are added to the solvent. Under nitrogen protection, the initiator and tackifying resin are added, and stirring reaction is carried out at 70°C for 5 hours to obtain the product.

[0072] Example 4

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

[0074] Example 5

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

[0076] Example 6

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

[0078] Comparative Example 1

[0079] A degradable mobile phone back glue material, which is only different from Example 2 in that vinyl ethoxyethyl acrylate is replaced with methoxypolyethylene glycol 400 acrylate of the same mass; the rest are the same.

[0080] Comparative Example 2

[0081] A degradable mobile phone back glue material, which is only different from Example 2 in that modified monomer A is replaced with modified monomer B of the same mass; the rest are the same.

[0082] Comparative Example 3

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

[0084] Comparative Example 4

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

[0086] The preparation process of the above-mentioned degradable mobile phone back glue material is as follows: Add the bio-based methacrylate monomer, vinyl ethoxyethyl acrylate, and 4-hydroxybutyl acrylate into the solvent. Under nitrogen protection, then add the initiator and the tackifying resin, and carry out a stirring reaction at 70 °C for 5 h to obtain it.

[0087] Test Example 1

[0088] Perform creep recovery tests on the mobile phone back glue materials prepared in Examples 1-6 and Comparative Examples 1-4: Use a rheometer for testing: The temperatures are -20 °C, 25 °C and 60 °C respectively, the stress is 10 KPa, the duration is 10 min, then cool naturally, the stress is 0 Pa, and the duration is 10 min.

[0089] Test Example 2

[0090] Apply the mobile phone back adhesive materials prepared in Examples 1-6 and Comparative Examples 1-4 on the upper surface of the PE foam layer to form a first pressure-sensitive adhesive layer. Cover the upper surface of the first pressure-sensitive adhesive layer with release paper. Apply the mobile phone back adhesive materials prepared in Examples 1-6 and Comparative Examples 1-4 on the lower surface of the PE foam layer to form a second pressure-sensitive adhesive layer, obtaining a PE foam double-sided adhesive; the thicknesses of both the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer are 20 μm; the thickness of the PE foam layer is 1000 μm; conduct the following performance tests on the PE foam double-sided adhesive:

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

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

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

[0094] Test results:

[0095] Table 1

[0096]

[0097] As can be seen from Table 1: The degradable mobile phone back adhesive materials of Examples 1-6 of the present invention have good creep properties, good adhesiveness with PC boards and 3D glass plates, good high and low temperature cycle performance, and drop resistance; however, the comprehensive effects of Examples 5 and 6 are relatively decreased compared with Examples 1-4, indicating that the proportions of tridecyl acrylate, isobornyl acrylate, and tetrahydrofurfuryl methacrylate have an impact on the performance of the degradable mobile phone back adhesive materials; in Comparative Example 1, vinyl ethoxyethyl acrylate was replaced with methoxypolyethylene glycol 400 acrylate of the same mass, and the molecular chain structure of the obtained degradable mobile phone back adhesive material changed, and the creep recovery rates at 25 °C and 60 °C decreased, and the high and low temperature cycle test was unqualified. In Comparative Example 2, only borate bonds were introduced, lacking disulfide bonds; in Comparative Example 3, only disulfide bonds were introduced, lacking borate bonds; in Comparative Example 4, neither disulfide bonds nor borate bonds were present; the obtained degradable mobile phone back adhesive materials had significantly poor creep recovery rates, and could not pass the high and low temperature cycle test and the drop test, and the peel strength of the degradable back adhesive material of Comparative Example 4 with the PC board and the 3D glass plate also decreased significantly.

[0098] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than limiting the protection scope of the present invention. Any simple modification or equivalent replacement made by those of ordinary skill in the art to the technical solution of the present invention shall not depart 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 tackifier 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 modified monomer A contains a disulfide bond and a double bond; the modified monomer B contains a borate bond and a double bond.

2. The degradable mobile phone adhesive material according to claim 1, characterized in that: The bio-based methacrylate monomers include tridecyl methacrylate, isobornyl acrylate and tetrahydrofuran methacrylate in a mass ratio of 8-15:1-2:

1.

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

1.

4. The degradable mobile phone adhesive material according to claim 1, characterized in that: The modified monomer A is obtained by reacting ethyl isocyanate acrylate and 2,2'-dithiodiethylamine.

5. The degradable mobile phone adhesive material according to claim 4, characterized in that: The preparation method of the 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.

6. The degradable mobile phone adhesive material according to claim 5, characterized in that: The mass ratio of the isocyanate ethyl acrylate, 2,2'-dithiodiethylamine and N,N-dimethylformamide is 1.8-1.9:1:20-30.

7. The degradable mobile phone adhesive material according to claim 1, characterized in that: The modified monomer B is obtained by reacting 1,4-phenylenediboronic acid, 2-amino-1,3-propylene glycol and ethyl isocyanate acrylate.

8. The degradable mobile phone adhesive material according to claim 7, characterized in that: 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 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 modified monomer B.

9. The degradable mobile phone adhesive material according to claim 8, characterized in that: The mass ratio of the 1,4-phenylenediboronic acid, 2-amino-1,3-propylene glycol and tetrahydrofuran is 1.5-1.6:1:30-40; the mass ratio of the 2-amino-1,3-propylene glycol and ethyl isocyanate acrylate is 1:3-3.

2.

10. The preparation process of the degradable mobile phone adhesive material according to any one of claims 1 to 9, 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, 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.

Images