Copper-doped titanium dioxide antibacterial skin-care window film

Abstract

The invention relates to the technical field of functional films, in particular to a copper-doped titanium dioxide antibacterial skin-care window film. The problems that an existing window film is low in ultraviolet blocking rate and low in antibacterial rate are solved. The window film is prepared by adding the copper-doped titanium dioxide antibacterial agent and the fluoro-benzophenone acrylate, copper ions are doped in titanium dioxide through anhydrous cupric sulfate, the antibacterial performance is improved, growth and reproduction of bacteria are effectively inhibited, and therefore the situation that due to bacterium breeding, the antibacterial property of the window film is improved, and the service life of the window film is prolonged is avoided. Through the reaction of isophorone diisocyanate, 4-fluoro-4 '-hydroxybenzophenone and acrylic acid-2-hydroxyethyl ester, fluorine atoms and benzophenone groups are introduced into acrylic ester, so that the ultraviolet blocking capability is improved; the window film has excellent ultraviolet-proof and skin-care functions, can effectively protect the skin from being damaged by ultraviolet rays, and has the advantages of broad-spectrum antibacterial property, long-acting stability, environment friendliness, suitability for large-area construction and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of functional film, and particularly relates to a copper-doped titanium dioxide antibacterial skin-protecting window film. BACKGROUND

[0002] With the improvement of people's requirements for health and life quality, the door and window glass of vehicles and buildings widely use anti-ultraviolet window films to block ultraviolet rays, reduce the risk of skin damage and aging, and realize the function of "skin protection". However, the surface of the window film is easy to breed bacteria in long-term use, forming a pollution source that is difficult to detect, and causing health hazards to the indoor environment. The existing antibacterial coating is mainly realized by adding antibacterial agents in ordinary coatings. The antibacterial agents mainly include organic antibacterial agents and inorganic antibacterial agents. Although the organic antibacterial agent has high and broad-spectrum antibacterial properties, it has defects such as easy volatilization, poor chemical stability, insufficient thermal stability, and poor compatibility with the base material, and is difficult to be applied in high-temperature curing process. The thermal stability of inorganic antibacterial agent is better, but the price of silver ion is expensive, and there is a dispute about biological toxicity; the nano titanium dioxide must rely on ultraviolet irradiation to activate the antibacterial performance, and the atomic oxygen generated under irradiation will decompose the coating resin, resulting in coating deterioration. In addition, the inorganic antibacterial agent is easy to migrate to the surface with time in the coating, and the antibacterial capacity is attenuated or even lost after wiping. The present application provides a copper-doped titanium dioxide antibacterial skin-protecting window film, which dopes copper ions in titanium dioxide, and synthesizes fluorine-based benzophenone acrylate to add in the coating, thereby improving the anti-ultraviolet ability and the antibacterial performance of the window film. SUMMARY

[0003] In order to overcome the above technical problems, the purpose of the present application is to provide a copper-doped titanium dioxide antibacterial skin-protecting window film, which solves the problems of low ultraviolet blocking rate and low antibacterial rate of the existing window film.

[0004] The purpose of the present application can be achieved by the following technical solutions: In a first aspect, the present application provides a copper-doped titanium dioxide antibacterial skin-protecting window film, which comprises the following weight parts: 10-25 parts of copper-doped titanium dioxide hybrid modified acrylate, 20-40 parts of aliphatic polyurethane acrylate, 6-14 parts of dipentaerythritol hexaacrylate, 9-21 parts of hydroxyethyl acrylate, 3-5 parts of 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide, 5-8 parts of butyl acetate, 20-32 parts of ethyl acetate, and 0.5-1 part of leveling agent.

[0005] The copper-doped titanium dioxide hybrid modified acrylate is prepared by the following steps: Step A1: titanium butylate, triol ethylamine and deionized water are added to a single-neck flask equipped with a stirrer, and stirred for 10-20 min to obtain a first solution; Step A2: copper sulfate pentahydrate, deionized water were added into a single neck flask equipped with a stirrer and stirred for 5-10 min, the first solution was added and stirred for 10-20 min, sodium hydroxide solution was added and stirred for 20-30 min, sealed and placed in a drying oven at 130-150 DEG C for 48-96 h, centrifuged and washed for 3-5 times at 1000-1200 r / min, placed in a muffle furnace and calcined at 450-550 DEG C for 1.5-2.5 h, ground to obtain copper-doped titanium dioxide antibacterial agent; Step A3: 4-fluoro-4'-hydroxybenzophenone, tetrahydrofuran were added into a single neck flask equipped with a stirrer and stirred for 5-10 min to obtain a second solution; Step A4: isophorone diisocyanate, dibutyltin dilaurate and tetrahydrofuran were added into a three-neck flask equipped with a mechanical stirrer, a condenser and a thermometer, nitrogen was introduced for 30 min, the second solution was added dropwise, and reacted at 80 DEG C for 2-3 h, 2,6-di-tert-butyl-p-cresol-tetrahydrofuran solution and 2-hydroxyethyl acrylate were added, and reacted at 80 DEG C for 2-3 h, purified by column chromatography with a mixed solvent of petroleum ether and ethyl acetate, settled for 3 times, rotary evaporated and precipitated to obtain fluoro-benzophenone acrylate; Step A5: fluoro-benzophenone acrylate, methacrylate, acrylic acid, azobisisobutyronitrile and butyl acetate were added into a single neck flask and ultrasonicated for 20-30 min to obtain a third solution; Step A6: copper-doped titanium dioxide antibacterial agent and butyl acetate were added into a beaker and ultrasonicated for 20-40 min, transferred into a reaction kettle, heated to 75 DEG C, nitrogen was introduced for 30-40 min to remove air, the third solution was added into the reaction kettle through a dropping funnel, and reacted at 70 DEG C for 6 h, the reaction liquid was settled with petroleum ether for 3 times, centrifuged and rotary evaporated to remove petroleum ether and butyl acetate, washed with ethyl acetate for 3-5 times, placed in a drying box and vacuum dried at 40 DEG C for 24 h to obtain copper-doped titanium dioxide hybrid modified acrylate.

[0006] As a further scheme of the application: the amount ratio of butyl titanate, triol ethylamine and deionized water in step A1 is 14-28 mL: 11-22 mL: 52.5-105 mL.

[0007] As a further scheme of the application: the amount ratio of copper sulfate pentahydrate, deionized water, the first solution and sodium hydroxide solution in step A2 is 0.036-0.072 g: 7.5-15 mL: 77.5-155 mL: 2.4-4.8 mL.

[0008] As a further scheme of the application: the molar concentration of the sodium hydroxide solution in step A2 is 0.12 mol / L.

[0009] As a further aspect of the present application: the amount ratio of the 4-fluoro-4'-hydroxybenzophenone and tetrahydrofuran in step A3 is 0.006-0.012 mol: 62.5-125 mL.

[0010] As a further aspect of the present application: the amount ratio of the isophorone diisocyanate, dibutyltin dilaurate, tetrahydrofuran, the second solution, 2,6-di-tert-butyl-p-cresol-tetrahydrofuran solution and 2-hydroxyethyl acrylate in step A4 is 0.0126-0.0252 mol: 0.045-0.09 g: 12.5-25 mL: 62.5-125 mL: 5-10 mL: 0.0132-0.0264 mol.

[0011] As a further aspect of the present application: the mass fraction of the 2,6-di-tert-butyl-p-cresol-tetrahydrofuran solution in step A4 is 1%.

[0012] As a further aspect of the present application: the volume ratio of the petroleum ether and ethyl acetate in the mixed solvent of petroleum ether and ethyl acetate in step A4 is 12:1.

[0013] As a further aspect of the present application: the amount ratio of the fluorine-based benzophenone-based acrylate, methyl methacrylate, acrylic acid, azobisisobutyronitrile and butyl acetate in step A5 is 7.5-15 g: 6.25-12.5 g: 2.5-5 g: 0.75-1.5 g: 1.75-3.5 g.

[0014] As a further aspect of the present application: the amount ratio of the copper-doped titanium dioxide antibacterial agent, butyl acetate and the third solution in step A6 is 2.5-5 g: 6.25-12.5 g: 18.75-37.5 g.

[0015] In a second aspect, the present application provides a preparation method of a copper-doped titanium dioxide antibacterial skin care window film, comprising the following steps: Step one: weigh the copper-doped titanium dioxide hybrid modified acrylate 10-25 parts, the aliphatic polyurethane acrylate 20-40 parts, the dipentaerythritol hexaacrylate 6-14 parts, the hydroxyethyl acrylate 9-21 parts, the 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide 3-5 parts, the butyl acetate 5-8 parts, the ethyl acetate 20-32 parts and the leveling agent 0.5-1 part according to the weight parts, and prepare; wherein the aliphatic polyurethane acrylate is composed of 6 functionality aliphatic polyurethane acrylate and 9 functionality aliphatic polyurethane acrylate according to a ratio of 1:3; the 9 functionality aliphatic polyurethane acrylate is of a model B-919B; the 6 functionality aliphatic polyurethane acrylate is of a model Ebecryl8702; and the auxiliary agent is a siloxane leveling agent of a BYK-333 type; Step two: copper-doped titanium dioxide hybrid modified acrylate, aliphatic polyurethane acrylate, dipentaerythritol hexaacrylate, hydroxyethyl acrylate, 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide, butyl acetate, ethyl acetate, leveling agent are added into the cylinder and stirred at 300-1500 r / min for 0.5-1 h, and then filtered; the mixed antibacterial skin care UV coating is stored in dark and sealed, and is ready for use after standing; Step three: a functional adhesive layer is formed by coating 6-15 mu of functional adhesive on one side of the 36-200 mu of original color PET substrate, drying for 30-120 s in a 70-130 DEG C oven, and then curing to form a functional adhesive layer, then the functional adhesive layer is laminated with 23-150 mu of transparent PET substrate, 6-30 mu of mounting adhesive is coated on the other side of the original color PET substrate, dried for 30-120 s in a 70-130 DEG C oven, and then cured to form a mounting adhesive layer, and the mounting adhesive layer is laminated with 23-75 mu of release film, 1-3 mu of antibacterial skin care UV coating is coated on the outer side of the transparent PET substrate, and then the coating is subjected to ultraviolet curing after volatilizing the solvent at a low temperature of 60-80 DEG C to form an antibacterial skin care coating layer, and finally the copper-doped titanium dioxide antibacterial skin care window film is obtained.

[0016] The beneficial effects of the present application are as follows: The preparation method of the copper-doped titanium dioxide antibacterial skin care window film of the present application, by doping of copper ions, not only endows titanium dioxide with good ultraviolet absorption function, but also enhances its antibacterial performance; the fluorine atom and the benzophenone group are introduced into the acrylate to improve the ultraviolet blocking ability and antibacterial rate of the material.

[0017] The application discloses a copper-doped titanium dioxide antibacterial skin-care window film. The copper-doped titanium dioxide antibacterial agent is prepared by hydrolysis of butyl titanate in water, alcohol elimination and condensation to form a Ti-O-Ti network structure, and dissolution of copper sulfate pentahydrate to provide copper ions into the Ti-O-Ti network structure, and then calcination to form the copper-doped titanium dioxide. The copper ions can chemically react with the proteins of bacteria to interfere with the metabolism and reproduction of the bacteria, thereby inhibiting the growth of the bacteria. Under the catalysis of dibutyltin dilaurate, the isocyanate groups of isophorone diisocyanate are subjected to nucleophilic addition with the hydroxyl groups of 4-fluoro-4'-hydroxybenzophenone to generate urethane bonds, and the hydroxyl groups of 2-hydroxyethyl acrylate are reacted with the residual isocyanate groups of isophorone diisocyanate to introduce acrylate double bonds, thereby obtaining a fluorine-based benzophenone acrylate. The high electronegativity of the fluorine atom and the strong C-F bond energy form a "shielding layer" to reflect ultraviolet rays, thereby improving the ultraviolet blocking capability. The benzophenone groups can form covalent bonds with substrates such as metals, plastics and wood to improve the adhesion and avoid peeling of the coating. In addition, the benzophenone groups can absorb ultraviolet light to generate active oxygen to damage the bacterial cell membrane and improve the antibacterial rate. The prepared antibacterial skin-care UV coating has good adhesion and good scratch resistance and wear resistance. The copper-doped titanium dioxide antibacterial skin-care window film obtained by solidification on the surface of a PET substrate can be applied to high-end buildings, automobiles, aerospace, electronics, medical treatment and other fields. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the application will be clearly and completely described in combination with the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application. Embodiment 1

[0019] The embodiment is a preparation method of a copper-doped titanium dioxide antibacterial skin-care window film, which comprises the following steps. Step A1: 14 mL of butyl titanate, 11 mL of triol ethylamine and 52.5 mL of deionized water are added into a single-neck flask provided with a stirrer, and stirring is performed for 10 min to obtain a first solution; Step A2: 0.036 g of copper sulfate pentahydrate and 7.5 mL of deionized water are added into a single-neck flask provided with a stirrer, and stirring is performed for 5 min. Then, 77.5 mL of the first solution is added and stirring is performed for 10 min. Then, 2.4 mL of a sodium hydroxide solution is added and stirring is performed for 20 min. After sealing, drying is performed in a blast drying oven at 130 DEG C for 48 h. Centrifugal washing is performed for 3 times at 1000 r / min, and calcination is performed in a muffle furnace at 450 DEG C for 1.5 h. After grinding, a copper-doped titanium dioxide antibacterial agent is obtained; Step A3: 0.006 mol 4-fluoro-4'-hydroxybenzophenone, 62.5 mL tetrahydrofuran were added into a single-neck flask equipped with a stirrer, stirred for 5 min to obtain a second solution; Step A4: 0.0126 mol isophorone diisocyanate, 0.045 g dibutyltin dilaurate and 12.5 mL tetrahydrofuran were added into a three-neck flask equipped with a mechanical stirrer, a condenser and a thermometer, nitrogen was introduced for 30 min, 62.5 mL of the second solution was added dropwise, and the reaction was carried out at 80°C for 2 h, 5 mL 2,6-di-tert-butyl-p-cresol-tetrahydrofuran solution and 0.0132 mol 2-hydroxyethyl acrylate were added, and the reaction was carried out at 80°C for 2 h, and then purified by column chromatography with a mixed solvent of petroleum ether and ethyl acetate, and precipitated for 3 times, and then rotary evaporated to obtain fluoro-benzophenone acrylate; Step A5: 7.5 g fluoro-benzophenone acrylate, 6.25 g methacrylate, 2.5 g acrylic acid, 0.75 g azobisisobutyronitrile and 1.75 g butyl acetate were added into a single-neck flask and ultrasonicated for 20 min to obtain a third solution; Step A6: 2.5 g copper-doped titanium dioxide antibacterial agent, 6.25 g butyl acetate were added into a beaker and ultrasonicated for 20 min, and then transferred into a reaction kettle, and then warmed to 75°C, nitrogen was introduced for 30 min to exhaust air, and then 18.75 g of the third solution was added into the reaction kettle through a dropping funnel, and the reaction was carried out at 70°C for 6 h, and then the reaction liquid was precipitated with petroleum ether for 3 times, and then centrifuged, and then rotary evaporated to remove petroleum ether and butyl acetate, and then washed with ethyl acetate for 3 times, and then placed in a drying box and vacuum dried at 40°C for 24 h to obtain copper-doped titanium dioxide hybrid modified acrylate; Step A7: copper-doped titanium dioxide hybrid modified acrylate 10 parts, aliphatic polyurethane acrylate 20 parts, dipentaerythritol hexaacrylate 6 parts, hydroxyethyl acrylate 9 parts, 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide 3 parts, butyl acetate 5 parts, ethyl acetate 20 parts, leveling agent 0.5 parts were weighed according to weight parts, and prepared for use; wherein the aliphatic polyurethane acrylate was composed of 6-functional aliphatic polyurethane acrylate and 9-functional aliphatic polyurethane acrylate in a ratio of 1:3; the 9-functional aliphatic polyurethane acrylate was of B-919B type; the 6-functional aliphatic polyurethane acrylate was of Ebecryl 8702 type; and the auxiliary agent was a siloxane leveling agent of BYK-333 type; Step A8: copper-doped titanium dioxide hybrid modified acrylate, aliphatic polyurethane acrylate, dipentaerythritol hexaacrylate, hydroxyethyl acrylate, 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide, butyl acetate, ethyl acetate, leveling agent were added into the cylinder and stirred at 300 r / min for 0.5 h, and then filtered. The mixed antibacterial skin care UV coating was stored in the dark after sealing, and was used after standing; Step A9: 6 μm of functional adhesive was coated on one side of the 36 μm original color PET substrate, dried for 30 s in a 70°C oven, and then cured to form a functional adhesive layer. Then, the functional adhesive layer was laminated with a 23 μm transparent PET substrate. 6 μm of mounting adhesive was coated on the other side of the original color PET substrate, dried for 30 s in a 70°C oven, and then cured to form a mounting adhesive layer. The mounting adhesive layer was laminated with a 23 μm release film. 1 μm of antibacterial skin care UV coating was coated on the outside of the transparent PET substrate. After volatilizing the solvent at a low temperature of 60°C, the antibacterial skin care coating layer was formed by ultraviolet curing. Finally, a copper-doped titanium dioxide antibacterial skin care window film was obtained. Example 2:

[0020] The present embodiment is a preparation method of a copper-doped titanium dioxide antibacterial skin care window film, which comprises the following steps: Step A1: 21 mL of butyl titanate, 16.5 mL of triol ethylamine, and 78.75 mL of deionized water were added to a single-neck flask equipped with a stirrer, and stirred for 15 min to obtain a first solution; Step A2: 0.054 g of copper sulfate pentahydrate and 11.25 mL of deionized water were added to a single-neck flask equipped with a stirrer and stirred for 7 min. 116.25 mL of the first solution was added and stirred for 15 min. 3.6 mL of sodium hydroxide solution was added and stirred for 25 min. After sealing, it was placed in a drying oven at 140°C for 72 h. It was centrifuged at 1100 r / min for 4 times, and then calcined at 500°C for 2 h in a muffle furnace. After grinding, a copper-doped titanium dioxide antibacterial agent was obtained; Step A3: 0.009 mol of 4-fluoro-4'-hydroxybenzophenone and 93.75 mL of tetrahydrofuran were added to a single-neck flask equipped with a stirrer, and stirred for 7 min to obtain a second solution; Step A4: 0.0189 mol of isophorone diisocyanate, 0.0675 g of dibutyltin dilaurate, and 18.75 mL of tetrahydrofuran were added to a three-neck flask equipped with a mechanical stirrer, a condenser, and a thermometer. Nitrogen was introduced for 30 min. 93.75 mL of the second solution was added dropwise, and the reaction was carried out at 80°C for 2.5 h. 7.5 mL of 2,6-di-tert-butyl-p-cresol-tetrahydrofuran solution and 0.0198 mol of 2-hydroxyethyl acrylate were added, and the reaction was carried out at 80°C for 2.5 h. The product was purified by column chromatography with a mixed solvent of petroleum ether and ethyl acetate, and was precipitated 3 times. The precipitate was rotary evaporated to obtain a fluorine-based benzophenone acrylate. Step A5: 11.25 g of fluorine-based benzophenone acrylate, 9.375 g of methyl acrylate, 3.75 g of acrylic acid, 1.125 g of azobisisobutyronitrile and 2.625 g of butyl acetate were added into a single-necked flask and ultrasonically treated for 25 min to obtain a third solution; Step A6: 3.75 g of copper-doped titanium dioxide antibacterial agent, 9.375 g of butyl acetate were added into a beaker and ultrasonically treated for 30 min, then transferred into a reaction kettle, warmed to 75℃, and purged with nitrogen for 35 min to remove air. 28.125 g of the third solution was added into the reaction kettle through a dropping funnel, and reacted at 70℃ for 6 h. The reaction solution was precipitated with petroleum ether for 3 times, centrifuged, and then rotary evaporated to remove petroleum ether and butyl acetate. The solution was washed with ethyl acetate for 4 times, and then placed in a drying box for vacuum drying at 40℃ for 24 h to obtain copper-doped titanium dioxide hybrid modified acrylate. Step A7: The copper-doped titanium dioxide hybrid modified acrylate 17.5 parts, the aliphatic polyurethane acrylate 30 parts, the dipentaerythritol hexaacrylate 10 parts, the hydroxyethyl acrylate 15 parts, the 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide 4 parts, the butyl acetate 6.5 parts, the ethyl acetate 26 parts, and the leveling agent 0.75 parts were weighed according to the weight ratio, and prepared for use. The aliphatic polyurethane acrylate was composed of 6-functional aliphatic polyurethane acrylate and 9-functional aliphatic polyurethane acrylate at a ratio of 1:3. The 9-functional aliphatic polyurethane acrylate was of B-919B type. The 6-functional aliphatic polyurethane acrylate was of Ebecryl 8702 type. The leveling agent was BYK-333 type silicone leveling agent. Step A8: The copper-doped titanium dioxide hybrid modified acrylate, the aliphatic polyurethane acrylate, the dipentaerythritol hexaacrylate, the hydroxyethyl acrylate, the 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide, the butyl acetate, the ethyl acetate, and the leveling agent were added into a cylinder and stirred at 900 r / min for 0.75 h. After filtration, the mixed antibacterial and skin care UV coating was stored in the dark and sealed, and then placed for standby. Step A9: A functional adhesive layer was formed by coating 9 μm of functional adhesive on one side of 118 μm of original color PET substrate, drying for 75 s in a 100℃ oven, and then curing. Then, the functional adhesive layer was laminated with 86 μm of transparent PET substrate. An installation adhesive layer was formed by coating 18 μm of installation adhesive on the other side of the original color PET substrate, drying for 75 s in a 100℃ oven, and then curing. The installation adhesive layer was laminated with 49 μm of release film. An antibacterial and skin care coating layer was formed by coating 2 μm of antibacterial and skin care UV coating on the outer side of the transparent PET substrate, volatilizing the solvent at a low temperature of 70℃, and then ultraviolet curing. Finally, a copper-doped titanium dioxide antibacterial and skin care window film was obtained. Example 3:

[0021] The embodiment is a preparation method of a copper-doped titanium dioxide antibacterial skin care window film, including the following steps. Step A1: 28 mL of butyl titanate, 22 mL of triol ethylamine and 105 mL of deionized water were added to a single-neck flask equipped with a stirrer, stirred for 20 min to obtain a first solution; Step A2: 0.072 g of copper sulfate pentahydrate and 15 mL of deionized water were added to a single-neck flask equipped with a stirrer and stirred for 10 min, 155 mL of the first solution was added and stirred for 20 min, 4.8 mL of sodium hydroxide solution was added and stirred for 30 min, and then sealed and placed in a drying oven at 150°C for 96 h, centrifuged at 1200 r / min for 5 times, placed in a muffle furnace and calcined at 550°C for 2.5 h, and then ground to obtain a copper-doped titanium dioxide antibacterial agent; Step A3: 0.012 mol of 4-fluoro-4'-hydroxybenzophenone and 125 mL of tetrahydrofuran were added to a single-neck flask equipped with a stirrer, stirred for 10 min to obtain a second solution; Step A4: 0.0252 mol of isophorone diisocyanate, 0.09 g of dibutyltin dilaurate and 25 mL of tetrahydrofuran were added to a three-neck flask equipped with a mechanical stirrer, a condenser and a thermometer, nitrogen was introduced for 30 min, 125 mL of the second solution was added dropwise, and the reaction was carried out at 80°C for 3 h, 10 mL of 2,6-di-tert-butyl-p-cresol-tetrahydrofuran solution and 0.0264 mol of 2-hydroxyethyl acrylate were added, and the reaction was carried out at 80°C for 3 h, and then column chromatography was carried out with a mixed solvent of petroleum ether and ethyl acetate, and the precipitate was obtained by rotary evaporation to obtain a fluorine-based benzophenone acrylate; Step A5: 15 g of fluorine-based benzophenone acrylate, 12.5 g of methacrylate, 5 g of acrylic acid, 1.5 g of azobisisobutyronitrile and 3.5 g of butyl acetate were added to a single-neck flask and ultrasonicated for 30 min to obtain a third solution; Step A6: 5 g of copper-doped titanium dioxide antibacterial agent and 12.5 g of butyl acetate were added to a beaker and ultrasonicated for 40 min, then transferred to a reaction kettle, heated to 75°C, and nitrogen was introduced for 40 min to remove air, 37.5 g of the third solution was added to the reaction kettle through a dropping funnel, and the reaction was carried out at 70°C for 6 h, then the reaction liquid was precipitated with petroleum ether for 3 times, centrifuged and rotary evaporated to remove petroleum ether and butyl acetate, washed with ethyl acetate for 5 times, and then placed in a drying box and vacuum dried at 40°C for 24 h to obtain a copper-doped titanium dioxide hybrid modified acrylate; Step A7: 25 parts of copper-doped titanium dioxide hybrid modified acrylate, 40 parts of aliphatic polyurethane acrylate, 14 parts of dipentaerythritol hexaacrylate, 21 parts of hydroxyethyl acrylate, 5 parts of 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide, 8 parts of butyl acetate, 32 parts of ethyl acetate, 1 part of leveling agent were weighed according to the weight parts, ready for use; wherein the aliphatic polyurethane acrylate is composed of 6 functionality aliphatic polyurethane acrylate and 9 functionality aliphatic polyurethane acrylate in a ratio of 1:3; the 9 functionality aliphatic polyurethane acrylate is of model B-919B; the 6 functionality aliphatic polyurethane acrylate is of model Ebecryl 8702; the auxiliary agent is BYK-333 type siloxane leveling agent; Step A8: copper-doped titanium dioxide hybrid modified acrylate, aliphatic polyurethane acrylate, dipentaerythritol hexaacrylate, hydroxyethyl acrylate, 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide, butyl acetate, ethyl acetate, leveling agent were added to the cylinder and stirred at 1500 r / min for 1 h, then filtered, and the mixed antibacterial skin care UV coating was stored in the dark after sealing, and was placed for standby; Step A9: 15 μm functional adhesive was coated on one side of the 200 μm original color PET substrate, dried for 120 s in a 130 °C oven, and then cured to form a functional adhesive layer, then laminated with a 150 μm transparent PET substrate, 30 μm mounting adhesive was coated on the other side of the original color PET substrate, dried for 120 s in a 130 °C oven, and then cured to form a mounting adhesive layer, and laminated with a 75 μm release film, 3 μm antibacterial skin care UV coating was coated on the outside of the transparent PET substrate, and after volatilizing the solvent at low temperature 80 °C, ultraviolet curing was carried out to form an antibacterial skin care coating layer, and finally a copper-doped titanium dioxide antibacterial skin care window film was prepared.

[0022] Comparative Example 1 The present comparative example is a preparation method of a copper-doped titanium dioxide antibacterial skin care window film, comprising the following steps: Step A1: 28 mL of butyl titanate, 22 mL of triol ethylamine and 105 mL of deionized water were added to a single-neck flask equipped with a stirrer, and stirred for 20 min to obtain a first solution; Step A2: 0.072 g of copper sulfate pentahydrate and 15 mL of deionized water were added to a single-neck flask equipped with a stirrer and stirred for 10 min, 155 mL of the first solution was added and stirred for 20 min, 4.8 mL of sodium hydroxide solution was added and stirred for 30 min, sealed and placed in a forced air drying oven at 150 °C for 96 h, centrifuged at 1200 r / min for 5 times, and placed in a muffle furnace at 550 °C for 2.5 h, ground to obtain a copper-doped titanium dioxide antibacterial agent; Step A3: 15 g of butyl acrylate, 12.5 g of methyl methacrylate, 5 g of acrylic acid, 1.5 g of azobisisobutyronitrile and 3.5 g of butyl acetate were added to a single-necked flask and ultrasonicated for 30 min to obtain a third solution; Step A4: 5 g of copper-doped titanium dioxide antibacterial agent and 12.5 g of butyl acetate were added to a beaker and ultrasonicated for 40 min, then transferred to a reaction kettle, warmed to 75°C, purged with nitrogen for 40 min to remove air, and 37.5 g of the third solution was added to the reaction kettle through a dropping funnel and reacted at 70°C for 6 h. The reaction solution was precipitated with petroleum ether for 3 times, centrifuged and rotary evaporated to remove petroleum ether and butyl acetate, washed with ethyl acetate for 5 times, and dried in a drying box at 40°C under vacuum for 24 h to obtain copper-doped titanium dioxide hybrid modified acrylate; Step A5: The copper-doped titanium dioxide hybrid modified acrylate was weighed as 25 parts, the aliphatic polyurethane acrylate was weighed as 40 parts, the dipentaerythritol hexaacrylate was weighed as 14 parts, the hydroxyethyl acrylate was weighed as 21 parts, the 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide was weighed as 5 parts, the butyl acetate was weighed as 8 parts, the ethyl acetate was weighed as 32 parts, and the leveling agent was weighed as 1 part, which were prepared for use. The aliphatic polyurethane acrylate was composed of 6-functional aliphatic polyurethane acrylate and 9-functional aliphatic polyurethane acrylate at a ratio of 1:3. The 9-functional aliphatic polyurethane acrylate was of model B-919B. The 6-functional aliphatic polyurethane acrylate was of model Ebecryl 8702. The auxiliary agent was a siloxane leveling agent of BYK-333 type. Step A6: The copper-doped titanium dioxide hybrid modified acrylate, the aliphatic polyurethane acrylate, the dipentaerythritol hexaacrylate, the hydroxyethyl acrylate, the 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide, the butyl acetate, the ethyl acetate and the leveling agent were added to a barrel and stirred at 1500 r / min for 1 h, then filtered and stored in the dark after sealing. The mixed antibacterial and skin-care UV coating was prepared for use. Step A7: A functional adhesive layer was formed by coating a functional adhesive on one side of a 200 μm original color PET substrate at 15 μm, drying for 120 s in a 130°C oven, and then curing to form a functional adhesive layer, then the functional adhesive layer was laminated with a 150 μm transparent PET substrate, a mounting adhesive layer was formed by coating a mounting adhesive on the other side of the original color PET substrate at 30 μm, drying for 120 s in a 130°C oven, and then curing to form a mounting adhesive layer, and then the mounting adhesive layer was laminated with a 75 μm release film, an antibacterial and skin-care coating layer was formed by coating an antibacterial and skin-care UV coating on the outside of the transparent PET substrate at 3 μm, volatilizing the solvent at a low temperature of 80°C, and then performing ultraviolet curing to form an antibacterial and skin-care coating layer, and finally a copper-doped titanium dioxide antibacterial and skin-care window film was prepared.

[0023] Comparative Example 2 The present comparative example is a preparation method of a copper-doped titanium dioxide antibacterial and skin-care window film, which comprises the following steps: Step A1: 28 mL of butyl titanate, 22 mL of triol ethylamine and 105 mL of deionized water were added to a single-mouth flask equipped with a stirrer, stirred for 20 min to obtain a first solution; Step A2: 0.072 g of copper sulfate pentahydrate, 15 mL of deionized water were added to a single-mouth flask equipped with a stirrer, stirred for 10 min, 155 mL of the first solution was added and stirred for 20 min, 4.8 mL of sodium hydroxide solution was added and stirred for 30 min, sealed and placed in a drying oven at 150°C for 96 h, centrifuged at 1200 r / min for 5 times, calcined in a muffle furnace at 550°C for 2.5 h, ground to obtain a copper-doped titanium dioxide antibacterial agent; Step A3: 0.0252 mol of 2-fluoroisocyanate phenyl ester, 0.09 g of dibutyltin dilaurate and 25 mL of tetrahydrofuran were added to a three-necked flask equipped with a mechanical stirrer, a condenser and a thermometer, nitrogen was introduced for 30 min, 10 mL of 2,6-di-tert-butyl-p-cresol-tetrahydrofuran solution and 0.0252 mol of 2-hydroxyethyl acrylate were added, and the reaction was carried out at 80°C for 3 h, and then purified by column chromatography with a mixed solvent of petroleum ether and ethyl acetate, settled for 3 times, and precipitated by rotary evaporation to obtain a fluoroacrylate; Step A4: 15 g of fluoroacrylate, 12.5 g of methacrylate, 5 g of acrylic acid, 1.5 g of azobisisobutyronitrile and 3.5 g of butyl acetate were added to a single-mouth flask and ultrasonicated for 30 min to obtain a third solution; Step A5: 5 g of copper-doped titanium dioxide antibacterial agent and 12.5 g of butyl acetate were added to a beaker and ultrasonicated for 40 min, then transferred to a reaction kettle, warmed to 75°C, introduced nitrogen for 40 min to remove air, and then 37.5 g of the third solution was added to the reaction kettle through a dropping funnel, and the reaction was carried out at 70°C for 6 h, then the reaction liquid was settled with petroleum ether for 3 times, centrifuged and rotary evaporated to remove petroleum ether and butyl acetate, washed with ethyl acetate for 5 times, and then placed in a drying box and vacuum dried at 40°C for 24 h to obtain a copper-doped titanium dioxide hybrid modified acrylate; Step A6: The copper-doped titanium dioxide hybrid modified acrylate, the aliphatic polyurethane acrylate, the dipentaerythritol hexaacrylate, the hydroxyethyl acrylate, the 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide, the butyl acetate, the ethyl acetate and the leveling agent were weighed according to the weight parts to obtain a mixture, wherein the aliphatic polyurethane acrylate was composed of 6-functional aliphatic polyurethane acrylate and 9-functional aliphatic polyurethane acrylate at a ratio of 1:3; the 9-functional aliphatic polyurethane acrylate was of B-919B type; the 6-functional aliphatic polyurethane acrylate was of Ebecryl 8702 type; and the leveling agent was a silicone leveling agent of BYK-333 type; Step A7: Add copper-doped titanium dioxide hybrid modified acrylate, aliphatic polyurethane acrylate, dipentaerythritol hexaacrylate, hydroxyethyl acrylate, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, butyl acetate, ethyl acetate, and leveling agent to a mixing cylinder and stir at 1500 r / min for 1 h. After filtration, seal the mixed antibacterial skin care UV coating away from light and let it stand for later use. Step A8: Coat one side of a 200μm original color PET substrate with a 15μm functional adhesive, dry it in a 130℃ oven for 120s to form a functional adhesive layer, and then bond it to a 150μm transparent PET substrate. Coat the other side of the original color PET substrate with a 30μm mounting adhesive, dry it in a 130℃ oven for 120s to form a mounting adhesive layer, and then bond it to a 75μm release film. Coat the outside of the transparent PET substrate with a 3μm antibacterial and skin-care UV coating, evaporate the solvent at a low temperature of 80℃, and then perform UV curing to form an antibacterial and skin-care coating. Finally, a copper-doped titanium dioxide antibacterial and skin-care window film is obtained.

[0024] Comparative Example 3: This comparative example illustrates a method for preparing a copper-doped titanium dioxide antibacterial skin-care window film, comprising the following steps: Step A1: Add 28 mL of tetrabutyl titanate, 22 mL of triethanolamine and 105 mL of deionized water to a single-necked flask equipped with a stirrer, stir for 20 min to obtain the first solution; Step A2: Add 0.072g of copper sulfate pentahydrate and 15mL of deionized water to a single-necked flask equipped with a stirrer and stir for 10min. Add 155mL of the first solution and stir for 20min. Add 4.8mL of sodium hydroxide solution and stir for 30min. After sealing, place the flask in a forced-air drying oven at 150℃ for 96h. Wash the flask five times by centrifugation at 1200r / min. Calcinate the flask in a muffle furnace at 550℃ for 2.5h. After grinding, obtain copper-doped titanium dioxide antibacterial agent. Step A3: Add 0.012 mol of 2,4-dihydroxybenzophenone and 125 mL of tetrahydrofuran to a single-necked flask equipped with a stirrer, stir for 10 min, and obtain the second solution; Step A4: Add 0.0252 mol isophorone diisocyanate, 0.09 g dibutyltin dilaurate, and 25 mL tetrahydrofuran to a three-necked flask equipped with a mechanical stirrer, condenser, and thermometer. Purge with nitrogen for 30 min, add 125 mL of the second solution dropwise, and react at 80 °C for 3 h. Add 10 mL of 2,6-di-tert-butyl-p-cresol-tetrahydrofuran solution and 0.0264 mol 2-hydroxyethyl acrylate, and react at 80 °C for 3 h. Purify by column chromatography with a mixed solvent of petroleum ether and ethyl acetate, precipitate three times, and evaporate the precipitate by rotary evaporation to obtain benzophenone acrylate. Step A5: 15g benzophenone acrylate, 12.5g methacrylate, 5g acrylic acid, 1.5g azobisisobutyronitrile and 3.5g butyl acetate were added into a single-necked flask and ultrasonicated for 30 min to obtain a third solution; Step A6: 5g copper-doped titanium dioxide antibacterial agent, 12.5g butyl acetate were added into a beaker and ultrasonicated for 40 min, then transferred into a reaction kettle, warmed to 75℃ and purged with nitrogen for 40 min to remove air, then 37.5g third solution was added into the reaction kettle through a dropping funnel and reacted at 70℃ for 6h, then the reaction liquid was precipitated with petroleum ether for 3 times, centrifuged and rotary evaporated to remove petroleum ether and butyl acetate, then washed with ethyl acetate for 5 times, and placed in a drying box for vacuum drying at 40℃ for 24h to obtain copper-doped titanium dioxide hybrid modified acrylate; Step A7: copper-doped titanium dioxide hybrid modified acrylate 25 parts, aliphatic polyurethane acrylate 40 parts, dipentaerythritol hexaacrylate 14 parts, hydroxyethyl acrylate 21 parts, 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide 5 parts, butyl acetate 8 parts, ethyl acetate 32 parts, leveling agent 1 part were weighed according to weight parts and prepared for standby; wherein the aliphatic polyurethane acrylate was composed of 6 functionality aliphatic polyurethane acrylate and 9 functionality aliphatic polyurethane acrylate in a ratio of 1:3; the 9 functionality aliphatic polyurethane acrylate was of model B-919B; the 6 functionality aliphatic polyurethane acrylate was of model Ebecryl8702; the auxiliary agent was a siloxane leveling agent of BYK-333 type; Step A8: copper-doped titanium dioxide hybrid modified acrylate, aliphatic polyurethane acrylate, dipentaerythritol hexaacrylate, hydroxyethyl acrylate, 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide, butyl acetate, ethyl acetate, leveling agent were added into a barrel and stirred at 1500r / min for 1h, then filtered and the mixed antibacterial and skin care UV coating was stored in the dark after sealing, and stood for standby; Step A9: a functional adhesive layer was formed by coating 15μm functional adhesive on one side of a 200μm original color PET substrate, drying for 120s in a 130℃ oven and then curing, then the original color PET substrate was laminated with a 150μm transparent PET substrate, a mounting adhesive layer was formed by coating 30μm mounting adhesive on the other side of the original color PET substrate, drying for 120s in a 130℃ oven and then curing, and then the mounting adhesive layer was laminated with a 75μm release film, and an antibacterial and skin care coating layer was formed by coating 3μm antibacterial and skin care UV coating on the outer side of the transparent PET substrate, volatilizing the solvent at low temperature 80℃ and then ultraviolet curing, thereby finally obtaining a copper-doped titanium dioxide antibacterial and skin care window film.

[0025] Performance test: The antibacterial and skin care UV coating provided by the present application has a dry film thickness of 3±0.5μm, and the performance test is carried out according to the following method: Adhesion: According to the standard of ASTM D3359-22. The specific operation method is to draw a square grid on the surface of the UV hardened coating with a grid marker, with a cutting distance of 2 mm, a total of six cuts. Use the 810 type adhesive tape produced by the American 3M company to stick flat on the square grid without leaving any gaps, then grab the free end of the adhesive tape and tear it back at an angle as close to 180° as possible. Observe whether there is delamination at the edge of the scratch. If there is no delamination, it is 5B, if the delamination is between 0-5%, it is 4B, if the delamination is between 5-15%, it is 3B, if the delamination is between 15-35%, it is 2B, if the delamination is between 35-65%, it is IB, and if the delamination is more than 65%, it is 0B.

[0026] Pencil hardness: According to the standard of GB / T 6739-2022 Paints and varnishes - Determination of film hardness by the pencil test, the pencil scratch film hardness tester.

[0027] Antibacterial test method: According to the test standard of GB / T 31402-2023 Determination of antibacterial activity on the surface of plastics and other non-porous materials, the bacteriostatic rate of the window film prepared by each example and the comparative example is tested, and the selected bacteria are Staphylococcus aureus and Escherichia coli, respectively; Ultraviolet blocking rate: tested by LS162A solar film tester.

[0028] Table 1 Performance test results of the coating formed by curing the PET base film provided by the examples and comparative examples

[0029] Referring to the table, according to the comparison between examples 1-3 and comparative examples 1-3, it can be seen that the antibacterial and skin-protecting UV coating prepared by adding copper-doped titanium dioxide antibacterial agent and fluorine-based benzophenone-based acrylate has good adhesion and ultraviolet blocking ability; According to the comparison between example 3 and comparative example 1, it can be seen that the antibacterial and skin-protecting UV coating prepared by adding copper-doped titanium dioxide antibacterial agent and fluorine-based benzophenone-based acrylate has higher Escherichia coli antibacterial rate than the antibacterial and skin-protecting UV coating prepared by adding copper-doped titanium dioxide antibacterial agent and acrylate, which shows that the antibacterial and skin-protecting UV coating prepared by adding copper-doped titanium dioxide antibacterial agent and fluorine-based benzophenone-based acrylate has excellent antibacterial performance; According to the comparison between Example 3 and Comparative Example 2, it can be seen that the E. coli antibacterial rate of the antibacterial skin-care UV coating prepared by adding the copper-doped titanium dioxide antibacterial agent and the fluorine-based benzophenone acrylate is higher than that of the antibacterial skin-care UV coating prepared by adding the copper-doped titanium dioxide antibacterial agent and the fluorine-based acrylate, which indicates that the antibacterial skin-care UV coating prepared by adding the copper-doped titanium dioxide antibacterial agent and the fluorine-based benzophenone acrylate has excellent antibacterial performance. According to the comparison between Example 3 and Comparative Example 3, it can be seen that the E. coli antibacterial rate of the antibacterial skin-care UV coating prepared by adding the copper-doped titanium dioxide antibacterial agent and the fluorine-based benzophenone acrylate is higher than that of the antibacterial skin-care UV coating prepared by adding the copper-doped titanium dioxide antibacterial agent and the benzophenone acrylate, which indicates that the antibacterial skin-care UV coating prepared by adding the copper-doped titanium dioxide antibacterial agent and the fluorine-based benzophenone acrylate has excellent antibacterial performance.

[0030] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do 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.

[0031] The above is only an example and description of the present application, and those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as they do not deviate from the invention or exceed the scope defined in the present application, which shall be within the protection scope of the present application.

Claims

1. A copper-doped titanium dioxide antibacterial skin-care window film, characterized in that, Includes the following components by weight: The mixture consists of 10-25 parts copper-doped titanium dioxide hybrid modified acrylate, 20-40 parts aliphatic polyurethane acrylate, 6-14 parts dipentaerythritol hexaacrylate, 9-21 parts hydroxyethyl acrylate, 3-5 parts 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 5-8 parts butyl acetate, 20-32 parts ethyl acetate, and 0.5-1 parts leveling agent. The copper-doped titanium dioxide hybrid modified acrylate is prepared by the following steps: Step A1: Stir tetrabutyl titanate, triethanolamine and deionized water to obtain the first solution; Step A2: Stir copper sulfate pentahydrate and deionized water, add the first solution and stir, add sodium hydroxide solution and stir, dry, centrifuge and wash, calcine, and grind to obtain copper-doped titanium dioxide antibacterial agent; Step A3: Stir 4-fluoro-4'-hydroxybenzophenone and tetrahydrofuran to obtain a second solution; Step A4: Isophorone diisocyanate, dibutyltin dilaurate and tetrahydrofuran are purged with nitrogen gas, reacted with the second solution, reacted with 2,6-di-tert-butyl-p-cresol-tetrahydrofuran solution and 2-hydroxyethyl acrylate, purified, precipitated, and precipitated by rotary evaporation to obtain fluorobenzophenone acrylate. Step A5: Sonicate fluorobenzophenone acrylate, methacrylate, acrylic acid, azobisisobutyronitrile and butyl acetate to obtain the third solution; Step A6: Ultrasonically mix copper-doped titanium dioxide antibacterial agent and butyl acetate, heat and purge with nitrogen, add a third solution to react, allow to settle, centrifuge, rotary evaporate, wash and dry to obtain copper-doped titanium dioxide hybrid modified acrylate.

2. The copper-doped titanium dioxide antibacterial skin-care window film according to claim 1, characterized in that, The ratio of tetrabutyl titanate, triethanolamine and deionized water used in step A1 is 14-28 mL: 11-22 mL: 52.5-105 mL.

3. The copper-doped titanium dioxide antibacterial skin-care window film according to claim 1, characterized in that, In step A2, the ratio of copper sulfate pentahydrate, deionized water, the first solution, and sodium hydroxide solution is 0.036-0.072 g : 7.5-15 mL : 77.5-155 mL : 2.4-4.8 mL; the molar concentration of the sodium hydroxide solution is 0.12 mol / L.

4. The copper-doped titanium dioxide antibacterial skin-care window film according to claim 1, characterized in that, The ratio of 4-fluoro-4'-hydroxybenzophenone to tetrahydrofuran in step A3 is 0.006-0.012 mol: 62.5-125 mL.

5. The copper-doped titanium dioxide antibacterial skin-care window film according to claim 1, characterized in that, In step A4, the molar ratio of isophorone diisocyanate, dibutyltin dilaurate, tetrahydrofuran, the second solution, 2,6-di-tert-butyl-p-cresol-tetrahydrofuran solution, and 2-hydroxyethyl acrylate is 0.0126-0.0252 mol : 0.045-0.09 g : 12.5-25 mL : 62.5-125 mL : 5-10 mL : 0.0132-0.0264 mol; the mass fraction of the 2,6-di-tert-butyl-p-cresol-tetrahydrofuran solution is 1%; and the volume ratio of petroleum ether to ethyl acetate in the mixed solvent of petroleum ether and ethyl acetate is 12:

1.

6. The copper-doped titanium dioxide antibacterial skin-care window film according to claim 1, characterized in that, The ratio of fluorobenzophenone acrylate, methacrylate, acrylic acid, azobisisobutyronitrile and butyl acetate used in step A5 is 7.5-15g: 6.25-12.5g: 2.5-5g: 0.75-1.5g: 1.75-3.5g.

7. The copper-doped titanium dioxide antibacterial skin-care window film according to claim 1, characterized in that, The ratio of copper-doped titanium dioxide antibacterial agent, butyl acetate, and the third solution in step A6 is 2.5-5g: 6.25-12.5g: 18.75-37.5g.

8. A method for preparing a copper-doped titanium dioxide antibacterial skin-care window film, characterized in that, The preparation of the copper-doped titanium dioxide antibacterial skin-care window film as described in any one of claims 1-7 includes the following steps: Step 1: Weigh out the following components by weight: 10-25 parts copper-doped titanium dioxide hybrid modified acrylate, 20-40 parts aliphatic polyurethane acrylate, 6-14 parts dipentaerythritol hexaacrylate, 9-21 parts hydroxyethyl acrylate, 3-5 parts 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 5-8 parts butyl acetate, 20-32 parts ethyl acetate, and 0.5-1 parts leveling agent. Set aside. Step 2: Add copper-doped titanium dioxide hybrid modified acrylate, aliphatic polyurethane acrylate, dipentaerythritol hexaacrylate, hydroxyethyl acrylate, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, butyl acetate, ethyl acetate, and leveling agent to a mixing cylinder and stir at 300-1500 r / min for 0.5-1 h. After filtration, store the mixed antibacterial skin care UV coating in a light-proof, sealed container and let it stand for later use. Step 3: Apply a 6-15μm functional adhesive to one side of the 36-200μm original color PET substrate. After drying in an oven at 70-130℃ for 30-120s, cure to form a functional adhesive layer. Then, bond it to a 23-150μm transparent PET substrate. Apply a 6-30μm mounting adhesive to the other side of the original color PET substrate. After drying in an oven at 70-130℃ for 30-120s, cure to form a mounting adhesive layer. Then, bond it to a 23-75μm release film. Apply a 1-3μm antibacterial and skin-care UV coating to the outside of the transparent PET substrate. After evaporating the solvent at a low temperature of 60-80℃, perform UV curing to form an antibacterial and skin-care coating. Finally, a copper-doped titanium dioxide antibacterial and skin-care window film is obtained.

9. The method for preparing a copper-doped titanium dioxide antibacterial skin care window film according to claim 8, characterized in that, in, The aliphatic polyurethane acrylate is composed of a 1:3 ratio of a 6-functional aliphatic polyurethane acrylate and a 9-functional aliphatic polyurethane acrylate; the 9-functional aliphatic polyurethane acrylate is of type B-919B; the 6-functional aliphatic polyurethane acrylate is of type Ebecryl8702; and the additive is a BYK-333 type siloxane leveling agent.

Images