Anti-fingerprint mobile phone tempered film and preparation method thereof

Abstract

The invention discloses an anti-fingerprint mobile phone tempered glass film and a preparation method thereof, and belongs to the technical field of tempered glass film preparation. The preparation method comprises the following steps: mixing 70-80 parts of high-functionality acrylate resin, 10-20 parts of a monomer and 90-100 parts of a solvent, adding 3-7 parts of a modified filler, 0.8-1.2 parts of an auxiliary agent, 0.8-1.2 parts of an antioxidant, 0.3-0.8 part of a wetting agent, 0.3-0.6 part of a leveling agent and 0.3-0.6 part of a defoaming agent, stirring, adding 3-6 parts of a photoinitiator, and stirring to obtain a protective coating; and spraying a protective coating on the surface of the tempered glass, and curing to obtain the anti-fingerprint mobile phone tempered film. A cross-linked spatial network structure is formed among the modified filler, the auxiliary agent and the monomer, so that the modified filler and the auxiliary agent can be highly dispersed and stably exist in the protective coating to fully play roles, fingerprints, stains, bacteria and the like are effectively reduced, the service life of the tempered film is greatly prolonged, and the use experience is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of tempered film preparation, and in particular, relates to an anti-fingerprint tempered film for a mobile phone and a preparation method thereof. Background Art

[0002] Mobile phones are indispensable communication devices for modern people, and the protection of mobile phone screens has gradually become a focus of users' concern. The commonly used screen protector is tempered film, which is made of a layer of plexiglass that can protect the screen.

[0003] However, when using existing tempered glass films for mobile phones, fingerprints will be produced on the screen surface due to the oil secreted by the user's skin, affecting the feeling and experience of using the mobile phone. If not cleaned in time, bacteria will breed, posing a health hazard to the user. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide an anti-fingerprint toughened film for a mobile phone and a preparation method thereof.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A method for preparing an anti-fingerprint mobile phone tempered film comprises the following steps:

[0007] 70-80 parts of high-functionality acrylic resin, 10-20 parts of monomer and 90-100 parts of solvent are placed in a reaction kettle, and stirred thoroughly until mixed evenly. Then, 3-7 parts of modified filler, 0.8-1.2 parts of auxiliary agent, 0.8-1.2 parts of antioxidant, 0.3-0.8 parts of wetting agent, 0.3-0.6 parts of leveling agent and 0.3-0.6 parts of defoaming agent are added and stirred evenly. Finally, 3-6 parts of photoinitiator are added and stirred until dispersed evenly to obtain a protective coating. Then, the protective coating is sprayed on the surface of the tempered glass, first cured at 100-120°C for 6-8h, and then heated to 140-160°C for 2-4h to obtain an anti-fingerprint mobile phone tempered film.

[0008] Furthermore, the monomer is one or more of isobornyl acrylate, 1,6-hexanediol diacrylate, trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, pentaerythritol triacrylate, propoxylated pentaerythritol tetraacrylate, and dipentaerythritol hexaacrylate.

[0009] Furthermore, the solvent is one or more of ethyl acetate, n-propyl acetate, butyl acetate, isopropanol, n-propanol, n-butanol, and propylene glycol methyl ether.

[0010] Furthermore, the modified filler is prepared by the following steps:

[0011] (1) 1,6-di(acryloyloxy)-2,2,3,3,4,4,5,5-octafluorohexane, DBU (1,8-diazobisspiro[5.4.0]undec-7-ene) and DMF (N,N-dimethylformamide) were added to a dry three-necked flask, stirred evenly and heated to 65°C, then bis[3-(triethoxysilyl)propyl]amine was slowly added, and the mixture was reacted at 65°C for 24 hours. After the reaction was completed, the mixture was cooled to room temperature and distilled under reduced pressure to obtain intermediate 1; the amount ratio of bis[3-(triethoxysilyl)propyl]amine, 1,6-di(acryloyloxy)-2,2,3,3,4,4,5,5-octafluorohexane, DBU and DMF was 43.8 mL:27.9 mL:2.9 mL:240 mL;

[0012] The molar ratio of bis[3-(triethoxysilyl)propyl]amine to 1,6-di(acryloyloxy)-2,2,3,3,4,4,5,5-octafluorohexane is controlled to be 1:1.05-1.1, and then bis[3-(triethoxysilyl)propyl]amine and 1,6-di(acryloyloxy)-2,2,3,3,4,4,5,5-octafluorohexane undergo Michael addition reaction under the catalysis of DBU. The reaction process is as follows:

[0013]

[0014] (2) The inorganic filler and deionized water were mixed evenly in a three-necked flask, and acetic acid was slowly added to adjust the pH to 4. Subsequently, the mixed solution of intermediate 1 and DMF was slowly added while stirring. After the addition was completed, the temperature was raised to 65°C and the reaction was kept warm for 1 hour. After the reaction was completed, it was cooled to room temperature and centrifuged. After centrifugation, the precipitate was ultrasonically dispersed in anhydrous ethanol for 0.5 hour, and finally dried at 80°C for 12 hours to obtain a modified filler. The amount ratio of inorganic filler, intermediate 1, DMF and deionized water was 20g:5g:15mL:250mL.

[0015] Furthermore, the inorganic filler is a compound of nano titanium dioxide, nano silicon dioxide and nano aluminum oxide in a mass ratio of 2:1:1.

[0016] Nano-silicon dioxide and nano-titanium dioxide have a good self-cleaning effect. Nano-aluminum oxide can improve the wear resistance, pollution resistance, weather resistance and optical properties of protective coatings. The combination of the three can enhance the pollution resistance, scratch resistance and wear resistance of mobile phone tempered films.

[0017] The silaneoxy groups on the intermediate 1 are hydrolyzed and cross-linked under heating and acidic conditions, and then chemically bonded with the hydroxyl groups on the surface of the inorganic filler (nano-titanium dioxide, nano-silicon dioxide, nano-alumina) to obtain a modified filler. The dispersion of the modified filler after organic modification becomes higher, so the modified filler can fully play its role and improve the stain resistance, scratch resistance and wear resistance of the protective coating. In addition, the surface of the modified filler contains rich fluorine elements, which are oleophobic and hydrophobic. Therefore, the protective coating containing the modified filler can form a hydrophobic and oleophobic layer on the surface of the tempered film after curing, thereby effectively preventing fingerprints or other stains from adhering.

[0018] The surface of the modified filler contains acrylate groups, which can react chemically with the acrylate groups in the additives and monomers under the action of the photoinitiator, so that the modified filler can be further dispersed and stably present in the protective coating, playing a long-term role in anti-fingerprint, anti-fouling and wear-resistant.

[0019] Furthermore, the auxiliary agent is prepared by the following steps:

[0020] S1. Blow nitrogen through a dry round-bottom flask to expel air and moisture from the flask, then add 2-aminobenzothiazole, triethylamine and chloroform, stir evenly and place in an ice-water bath (0°C), then slowly add a mixed solution of 3-chloropropionyl chloride and chloroform in a constant pressure dropping funnel to the flask, continue the reaction for 1 hour after the addition is completed, desolventize under reduced pressure after the reaction is completed, and then purify by column chromatography (a mixed solvent of chloroform and ether is selected as the eluent, and the volume ratio of chloroform to ether is 9:1), and finally desolventize under reduced pressure to obtain intermediate 2; the amount ratio of 2-aminobenzothiazole, 3-chloropropionyl chloride, triethylamine and chloroform is 30g:21mL:33.4mL:200mL;

[0021] Triethylamine is used as an acid binding agent, and the molar ratio of 2-aminobenzothiazole and 3-chloropropionyl chloride is controlled to be 1:1.05-1.1. Then, -NH2 of 2-aminobenzothiazole and the acyl chloride of 3-chloropropionyl chloride undergo an affinity addition reaction under the condition of an ice-water bath. The reaction process is as follows:

[0022]

[0023] S2, add intermediate 2, pyridine and chloroform into a dry three-necked flask, stir and dissolve, then heat to 60°C, slowly add N,N'-dimethyl-1,3-propylenediamine, continue to keep warm at 60°C for 3h after the addition, cool to room temperature after the reaction, and then distill under reduced pressure to obtain intermediate 3; the amount ratio of intermediate 2, N,N'-dimethyl-1,3-propylenediamine, pyridine and chloroform is 39.3g:18.8mL:15.5mL:220mL;

[0024] Pyridine is used as an acid-binding agent to control the molar ratio of intermediate 2 and N,N'-dimethyl-1,3-propylenediamine to be 1.05-1.1:1. The -Cl of intermediate 2 and the -NH- of N,N'-dimethyl-1,3-propylenediamine undergo a substitution reaction under heating. The reaction process is shown below:

[0025]

[0026] S3, trimethylolpropane triacrylate, DBU (1,8-diazobisspiro[5.4.0]undec-7-ene) and dimethyl sulfoxide were added to a dry three-necked flask, stirred and dissolved, and then heated to 65°C, and then the mixed solution of intermediate 3 and dimethyl sulfoxide was slowly added. After the addition was completed, the mixture was kept at 65°C for 24 hours. After the reaction was completed, it was cooled to room temperature and distilled under reduced pressure to obtain intermediate 4; the amount ratio of intermediate 3, trimethylolpropane triacrylate, DBU and dimethyl sulfoxide was 33.4g:26.9mL:3mL:200mL;

[0027] Under the catalytic action of DBU, the molar ratio of intermediate 3 to trimethylolpropane triacrylate is controlled to be 1.05-1.1:1, and intermediate 3 and trimethylolpropane triacrylate undergo Michael addition reaction. The reaction process is as follows:

[0028]

[0029] S4. Blow nitrogen through a dry three-necked flask to expel air and moisture from the flask, then add intermediate 4, triethylamine and dimethyl sulfoxide, stir to dissolve, then heat to 80°C, then slowly add tetradecane bromide, after adding, keep warm at 80°C for 6 hours, after the reaction is completed, cool to room temperature, then distill under reduced pressure to obtain an auxiliary agent; the usage ratio of intermediate 4, tetradecane bromide, triethylamine and dimethyl sulfoxide is 30.1 g:31.7 mL:7.2 mL:240 mL.

[0030] Triethylamine is used as an acid binding agent to control the molar ratio of intermediate 4 to tetradecane bromide to be 1:2.1-2.15. The tertiary amine group of intermediate 4 and -Br of tetradecane bromide undergo a di-substitution reaction under heating. The reaction process is as follows:

[0031]

[0032] The auxiliary agent contains both benzothiazole heterocyclic structure and amide structure, both of which have antibacterial activity. The auxiliary agent also contains multiple quaternary ammonium salt structures, which are antibacterial by destroying cell membrane structure, denaturing proteins, interfering with enzyme systems, changing cell membrane permeability, and interfering with nucleic acid and protein synthesis. The strength of the antibacterial activity of the quaternary ammonium salt structure is mainly determined by the chain length of the alkyl chain on its N atom. The quaternary ammonium salt structure with an alkyl chain length greater than 10 carbon atoms or less than 16 carbon atoms has the best antibacterial activity, and when the number of carbon atoms is 14, the antibacterial property is the best. The length of the alkyl chain in the quaternary ammonium salt structure of the auxiliary agent of the present invention is 14 carbon atoms, so the auxiliary agent has excellent antibacterial property. In addition, the synergistic effect of the benzothiazole heterocyclic structure and the amide structure, the auxiliary agent of the present invention has excellent antibacterial activity, can effectively protect the tempered film of the mobile phone, and make it difficult to breed bacteria. In addition, as a kind of cationic surfactant, quaternary ammonium salt can effectively absorb moisture in the air due to its special chemical structure and properties, thereby showing an excellent antistatic effect.

[0033] The acrylate groups in the auxiliary agent can react chemically with the acrylate groups in the modified filler and the monomer under the action of the photoinitiator, and then the auxiliary agent, the modified filler and the monomer form a mutually cross-linked spatial network structure, which promotes the further dispersion of the modified filler and the stability of the auxiliary agent in the protective coating, making it difficult for both to migrate and fall out. Therefore, the protective coating of the present invention has excellent antibacterial, antistatic and anti-fingerprint effects for a long time, can effectively protect the tempered film of the mobile phone and extend its service life.

[0034] Furthermore, the antioxidant is one or more of antioxidant 1010, antioxidant 1076, antioxidant 168, and antioxidant DLTDP.

[0035] Furthermore, the wetting agent is one or more of the polysiloxane polyether copolymer wetting agents.

[0036] Furthermore, the leveling agent is one or more of BYK-361N leveling agent, BYK-323 leveling agent, isophorone, diacetone alcohol, and polydimethylsiloxane.

[0037] Furthermore, the defoamer is one or both of BYK-024 defoamer and polyoxyethylene alcohol.

[0038] Furthermore, the photoinitiator is one or more of 2-hydroxy-2-methylphenylacetone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and benzophenone.

[0039] The present invention also discloses an anti-fingerprint mobile phone tempered film, which is prepared according to the above-mentioned method for preparing the anti-fingerprint mobile phone tempered film.

[0040] The beneficial effects of the present invention are as follows: there is a chemical reaction between the modified filler, the auxiliary agent and the monomer, thereby forming a mutually cross-linked spatial network structure. Therefore, the modified filler containing nano titanium dioxide, nano silicon dioxide, nano aluminum oxide and rich fluorine elements and the auxiliary agent containing benzothiazole heterocyclic structure, amide structure and quaternary ammonium salt structure can be highly dispersed and stably present in the protective coating, fully exerting their functions, effectively reducing fingerprints, stains and bacteria, etc., greatly improving the user experience of the mobile phone tempered film and extending the service life of the mobile phone tempered film. DETAILED DESCRIPTION

[0041] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Example 1: Preparation of modified filler, the specific steps are as follows:

[0043] (1) 27.9 mL of 1,6-di(acryloyloxy)-2,2,3,3,4,4,5,5-octafluorohexane, 2.9 mL of DBU and 240 mL of DMF were added to a 500 mL dry three-necked flask, stirred evenly and heated to 65° C., then 43.8 mL of bis[3-(triethoxysilyl)propyl]amine was slowly added, and the mixture was reacted at 65° C. for 24 h. After the reaction was completed, the mixture was cooled to room temperature and distilled under reduced pressure to obtain intermediate 1;

[0044] (2) 8 g of nano-titanium dioxide, 4 g of nano-silicon dioxide, 4 g of nano-alumina, and 250 mL of deionized water were mixed evenly in a 500 mL three-necked flask, and acetic acid was slowly added to adjust the pH to 4. Subsequently, 5 g of intermediate 1 and 15 mL of DMF were slowly added while stirring. After the addition was completed, the temperature was raised to 65°C and the reaction was kept warm for 1 hour. After the reaction was completed, the mixture was cooled to room temperature and centrifuged. After centrifugation, the precipitate was ultrasonically dispersed in anhydrous ethanol for 0.5 hour, and finally dried at 80°C for 12 hours to obtain a modified filler.

[0045] Example 2: Preparation of modified filler, the specific steps are as follows:

[0046] The remaining steps remain unchanged, only step (1) of Example 1 is removed, and the intermediate 1 in step (2) is replaced by 3-aminopropyltrimethoxysilane to prepare a modified filler.

[0047] Example 3: Preparation of auxiliary agent, the specific steps are as follows:

[0048] S1. Blow nitrogen gas through a 500 mL dry round-bottom flask to expel air and moisture from the flask, then add 30 g of 2-aminobenzothiazole, 33.4 mL of triethylamine and 180 mL of chloroform, stir evenly and place in an ice-water bath (0°C), then slowly add a mixed solution of 21 mL of 3-chloropropionyl chloride and 20 mL of chloroform in a constant pressure dropping funnel to the flask, continue the reaction for 1 h after the addition is completed, desolventize under reduced pressure after the reaction is completed, and then purify by column chromatography (a mixed solvent of chloroform and ether is selected as the eluent, and the volume ratio of chloroform to ether is 9:1), and finally desolventize under reduced pressure to obtain intermediate 2;

[0049] S2, add 39.3g of intermediate 2, 15.5mL of pyridine and 220mL of chloroform into a 500mL dry three-necked flask, stir to dissolve, then heat to 60°C, then slowly add 18.8mL of N,N'-dimethyl-1,3-propylenediamine, and continue to react at 60°C for 3h after the addition is completed. After the reaction is completed, cool to room temperature first, and then distill under reduced pressure to obtain intermediate 3;

[0050] S3, add 26.9 mL of trimethylolpropane triacrylate, 3 mL of DBU and 150 mL of dimethyl sulfoxide into a 500 mL dry three-necked flask, stir to dissolve and then heat to 65°C, then slowly add a mixed solution of 33.4 g of intermediate 3 and 50 mL of dimethyl sulfoxide, after the addition is complete, keep the temperature at 65°C for 24 hours, cool to room temperature after the reaction is completed, and distill under reduced pressure to obtain intermediate 4;

[0051] S4. Blow nitrogen into a 500mL dry three-necked flask to expel air and moisture from the flask, then add 30.1g of intermediate 4, 7.2mL of triethylamine and 240mL of dimethyl sulfoxide, stir to dissolve and heat to 80°C, then slowly add 31.7mL of tetradecane bromide, keep warm at 80°C for 6h after the addition is complete, cool to room temperature after the reaction is completed, and then distill under reduced pressure to obtain an auxiliary agent.

[0052] Example 4: Preparation of an anti-fingerprint tempered film for a mobile phone, the specific steps are as follows:

[0053] 70 parts of GU7900Z high-functionality acrylic resin with a functionality of 10 purchased from Guojing Chemical Co., Ltd., 10 parts of dipentaerythritol hexaacrylate and 90 parts of ethyl acetate were placed in a reactor and stirred until they were evenly mixed. Then, 3 parts of the modified filler prepared in Example 1, 0.8 parts of the auxiliary agent prepared in Example 3, 0.8 parts of antioxidant 1010, 0.3 parts of WetKL270 wetting agent, 0.3 parts of BYK-361N leveling agent, and 0.3 parts of BYK-024 defoaming agent were added and stirred evenly. Finally, 3 parts of 2-hydroxy-2-methylphenylacetone were added and stirred until they were evenly dispersed to obtain a protective coating. Then, the protective coating was sprayed on the surface of the tempered glass, first cured at 100° C. for 8 hours, and then heated to 140° C. for 4 hours to obtain an anti-fingerprint mobile phone tempered film.

[0054] Example 5: Preparation of an anti-fingerprint tempered film for a mobile phone, the specific steps are as follows:

[0055] 75 parts of GU7900Z high-functionality acrylic resin with a functionality of 10 purchased from Guojing Chemical Co., Ltd., 8 parts of 1,6-hexanediol diacrylate, 8 parts of propoxylated pentaerythritol tetraacrylate, 55 parts of butyl acetate and 40 parts of propylene glycol methyl ether were placed in a reactor and stirred until uniformly mixed. Then, 5 parts of the modified filler prepared in Example 1, 1 part of the auxiliary agent prepared in Example 3, 0.8 parts of antioxidant 1010, 0.2 parts of antioxidant 168, 0.6 parts of WetKL270 wetting agent, 0.2 parts of BYK-323 leveling agent, 0.2 parts of isophorone, and 0.4 parts of polyoxyethylene alcohol were added and stirred evenly. Finally, 5 parts of benzophenone were added and stirred until uniformly dispersed to obtain a protective coating. Then, the protective coating was sprayed on the surface of the tempered glass, first cured at 120° C. for 6 hours, and then heated to 160° C. for 2 hours to obtain an anti-fingerprint mobile phone tempered film.

[0056] Example 6: Preparation of an anti-fingerprint tempered film for a mobile phone, the specific steps are as follows:

[0057] 80 parts of GU7900Z high-functionality acrylic resin with a functionality of 10 purchased from Guojing Chemical Co., Ltd., 7 parts of isobornyl acrylate, 7 parts of ethoxylated trimethylolpropane triacrylate, 6 parts of dipentaerythritol hexaacrylate, 30 parts of n-propyl acetate, 40 parts of isopropanol and 30 parts of propylene glycol methyl ether were placed in a reaction kettle and stirred until uniformly mixed, and then 7 parts of the modified filler prepared in Example 1, 1.2 parts of the auxiliary agent prepared in Example 3, 0.8 parts of antioxidant 1076, 0.2 parts of antioxidant 168, 0.2 parts of antioxidant DL TDP, 0.8 parts of WetKL270 wetting agent, 0.2 parts of BYK-361N leveling agent, 0.2 parts of diacetone alcohol, 0.2 parts of polydimethylsiloxane, 0.3 parts of BYK-024 defoaming agent, and 0.3 parts of polyoxyethylene alcohol are mixed evenly, and finally 3 parts of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide and 3 parts of benzophenone are added and stirred until uniformly dispersed to obtain a protective coating; then the protective coating is sprayed on the surface of the tempered glass, first cured at 110°C for 7 hours, and then heated to 145°C for 3 hours to obtain an anti-fingerprint mobile phone tempered film.

[0058] Comparative Example 1: Preparation of a mobile phone tempered film, the specific steps are as follows:

[0059] The remaining steps remain unchanged, only the auxiliary agent in Example 4 is replaced by ditetradecyl dimethyl ammonium bromide to prepare a mobile phone tempered film.

[0060] Comparative Example 2: Preparation of a mobile phone tempered glass film, the specific steps are as follows:

[0061] The remaining steps remain unchanged, only the modified filler of Example 4 is replaced by the modified filler prepared in Example 2 to prepare a mobile phone tempered film.

[0062] Performance Testing

[0063] Using a contact angle tester, 2-3 μL of distilled water was dropped on the surface of the mobile phone tempered film of Examples 4-6 and Comparative Examples 1-2 to test the water drop angle; fingerprints were left on the film at 200 gf / cm 2 Load, tie the dust-free cloth to the wear tester, wipe the film back and forth 3 times to see the fingerprint residue; use 0000# steel wool, load 1Kg, test the number of times the steel wool rubs on the tempered film of the mobile phone without scratches. The test results of all items are shown in Table 1 below:

[0064] Table 1

[0065] project Water drop angle / ° Fingerprint residue Wear resistance / times Example 4 134 No residue 2900 Example 5 136 No residue 2950 Example 6 137 No residue 3000 Comparative Example 1 128 No residue 2800 Comparative Example 2 101 There is a residue 2600

[0066] Antibacterial test: Add 20 mL of agar medium (prepare agar solution at a ratio of 3.2 g of nutrient agar per 100 mL of deionized water, shake well and sterilize in an autoclave. When the temperature in the autoclave drops to 60°C, take it out for later use) and 0.1 mL of Escherichia coli suspension (Escherichia coli 35218, 6×10 5 CFU / mL), after oscillation, add 70mL phosphate buffered saline (8.0g sodium chloride, 1.44g disodium hydrogen phosphate and 0.24g potassium dihydrogen phosphate are weighed and dissolved in 800mL distilled water, and the pH value of the solution is adjusted to 7.4 with hydrochloric acid, and finally distilled water is added to make up to 1L to obtain 0.01mol / L phosphate buffered saline), the mobile phone tempered film of Examples 4-6 and Comparative Examples 1-2 is cut into thin slices with a diameter of 5mm and added to the culture dish, and each group of culture dishes is placed in a constant temperature and humidity incubator (temperature is 37°C, relative humidity is greater than 90%), cultured for 24h and 30 days, and the antibacterial rate is calculated. The results are shown in Table 2:

[0067] Table 2

[0068]

[0069] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A method for preparing an anti-fingerprint tempered film for a mobile phone, characterized in that: The following steps are involved: Mix 70-80 parts of high-functionality acrylic resin, 10-20 parts of monomer and 90-100 parts of solvent, add 3-7 parts of modified filler, 0.8-1.2 parts of auxiliary agent, 0.8-1.2 parts of antioxidant, 0.3-0.8 parts of wetting agent, 0.3-0.6 parts of leveling agent, 0.3-0.6 parts of defoaming agent, stir, add 3-6 parts of photoinitiator, stir to obtain a protective coating; spray the protective coating on the surface of the tempered glass, cure at 100-120°C for 6-8h, then heat to 140-160°C for 2-4h to obtain an anti-fingerprint mobile phone tempered film.

2. The method for preparing an anti-fingerprint tempered film for a mobile phone according to claim 1, characterized in that: The modified filler is prepared by the following steps: (1) 1,6-di(acryloyloxy)-2,2,3,3,4,4,5,5-octafluorohexane, DBU and DMF were added to a flask, the temperature was raised to 65° C., bis[3-(triethoxysilyl)propyl]amine was added, the reaction was continued for 24 hours, the reaction was cooled, and the reaction was carried out under reduced pressure to obtain intermediate 1; (2) An inorganic filler and deionized water were mixed in a flask, acetic acid was added to adjust the pH to 4, intermediate 1 and DMF were added, the temperature was raised to 65° C. for reaction for 1 h, cooled, centrifuged, ultrasonically dispersed in anhydrous ethanol, and dried to obtain a modified filler; The auxiliary agent is prepared by the following steps: S1, after nitrogen blowing into the flask, add 2-aminobenzothiazole, triethylamine and chloroform, add 3-chloropropionyl chloride and chloroform at 0°C, react for 1 hour, remove the solvent under reduced pressure, purify by column chromatography, and remove the solvent under reduced pressure to obtain intermediate 2; S2, add intermediate 2, pyridine and chloroform into a flask, heat to 60°C, add N,N'-dimethyl-1,3-propylenediamine, react for 3h, cool, and distill under reduced pressure to obtain intermediate 3; S3, trimethylolpropane triacrylate, DBU and dimethyl sulfoxide were added to a flask, the temperature was raised to 65°C, intermediate 3 and dimethyl sulfoxide were added, the reaction was continued for 24 hours, the reaction was continued under reduced pressure and distillation was performed to obtain intermediate 4; S4. After nitrogen is blown into the flask, intermediate 4, triethylamine and dimethyl sulfoxide are added, the temperature is raised to 80°C, tetradecane bromide is added, the reaction is carried out for 6 hours, the flask is cooled, and the auxiliary agent is obtained by distillation under reduced pressure.

3. The method for preparing an anti-fingerprint toughened film for a mobile phone according to claim 2, characterized in that: The amount ratio of bis[3-(triethoxysilyl)propyl]amine, 1,6-di(acryloyloxy)-2,2,3,3,4,4,5,5-octafluorohexane, DBU and DMF in step (1) is 43.8 mL:27.9 mL:2.9 mL:240 mL; the amount ratio of inorganic filler, intermediate 1, DMF and deionized water in step (2) is 20 g:5 g:15 mL:250 mL; the inorganic filler is nano-titanium dioxide, nano-silicon dioxide and nano-aluminum oxide compounded in a mass ratio of 2:1:

1.

4. The method for preparing an anti-fingerprint toughened film for a mobile phone according to claim 2, characterized in that: The amount ratio of 2-aminobenzothiazole, 3-chloropropionyl chloride, triethylamine and chloroform in step S1 is 30g:21mL:33.4mL:200mL; the amount ratio of intermediate 2, N,N'-dimethyl-1,3-propylenediamine, pyridine and chloroform in step S2 is 39.3g:18.8mL:15.5mL:220mL; the amount ratio of intermediate 3, trimethylolpropane triacrylate, DBU and dimethyl sulfoxide in step S3 is 33.4g:26.9mL:3mL:200mL; the amount ratio of intermediate 4, tetradecane bromide, triethylamine and dimethyl sulfoxide in step S4 is 30.1g:31.7mL:7.2mL:240mL.

5. The method for preparing an anti-fingerprint toughened film for a mobile phone according to claim 1, characterized in that: The monomer is one or more of isobornyl acrylate, 1,6-hexanediol diacrylate, trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, pentaerythritol triacrylate, propoxylated pentaerythritol tetraacrylate, and dipentaerythritol hexaacrylate.

6. The method for preparing an anti-fingerprint toughened film for a mobile phone according to claim 1, characterized in that: The solvent is one or more of ethyl acetate, n-propyl acetate, butyl acetate, isopropanol, n-propanol, n-butanol, and propylene glycol methyl ether; the antioxidant is one or more of antioxidant 1010, antioxidant 1076, antioxidant 168, and antioxidant DLTDP.

7. The method for preparing an anti-fingerprint toughened film for a mobile phone according to claim 1, characterized in that: The wetting agent is one or more of polysiloxane polyether copolymer wetting agents; the leveling agent is one or more of BYK-361N leveling agent, BYK-323 leveling agent, isophorone, diacetone alcohol, and polydimethylsiloxane.

8. The method for preparing an anti-fingerprint toughened film for a mobile phone according to claim 1, characterized in that: The defoamer is one or both of BYK-024 defoamer and polyoxyethylene alcohol.

9. The method for preparing an anti-fingerprint toughened film for a mobile phone according to claim 1, characterized in that: The photoinitiator is one or more of 2-hydroxy-2-methylphenylacetone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide and benzophenone.

10. A fingerprint-proof tempered glass film for mobile phones, characterized in that: The anti-fingerprint tempered film for mobile phones is prepared according to the method for preparing the anti-fingerprint tempered film according to any one of claims 1 to 9.

Images