High-transmittance coating solution, high-transmittance decorative surface film, and preparation method and application thereof

Abstract

The present application relates to a kind of high light transmission coating liquid, high light transmission decorative film and its preparation method and application, including the following weight parts of component: acrylate emulsion 50-70 parts, water-soluble silica sol 20-25 parts, coupling agent 1-5 parts, ultraviolet shielding agent 3-8 parts, filler 3-5 parts, auxiliary agent 1-5 parts and water 20-45 parts;The preparation raw material of the acrylate emulsion includes the following weight parts: water 100 parts, hard monomer 10-15 parts, soft monomer 20-25 parts, functional monomer 15-20 parts, double bond containing siloxane 15-20 parts, emulsifier 2-4 parts and initiator 0.1-0.2 part, wherein, the functional monomer is the composition of acryloyl morpholine, methyl hexafluorobutyl methacrylate and cyclotrimethylolpropane methyl acetal acrylate.The coating liquid of the present application obtains decorative film and has stronger ultraviolet protection, stronger adhesion, good wear resistance and light transmission.

Description

Technical Field

[0001] This invention relates to the technical field of coating, specifically to a high-transmittance coating solution, a high-transmittance decorative film, its preparation method, and its application. Background Technology

[0002] Traditional coating solutions often contain large amounts of volatile organic solvents, such as toluene and ketones. These organic solvents evaporate into the air during use, not only polluting the environment but also posing a flammable risk and endangering production safety. Furthermore, long-term exposure to these organic solvents may have adverse effects on human health, such as irritating the respiratory tract and skin, and may even lead to more serious health problems.

[0003] Existing furniture decorative films suffer from a series of significant drawbacks in practical applications. First, the application of traditional TiO2 photocatalysts is limited; they only respond to ultraviolet light, and their efficiency is particularly low under natural light, making them unsuitable for everyday use. Second, some decorative films contain fluorinated surfactants, such as perfluorooctanoic acid (PFOA), which are highly toxic, posing a potential threat to human health and contradicting current environmental protection trends. Third, the fabrication process of multi-layer composite films is quite complex, requiring multiple steps and meticulous operation, directly increasing production costs and hindering market promotion. Finally, the light transmittance of the film is also a significant issue; existing decorative films generally have a transmittance of less than 92%, which negatively impacts the decorative effect and significantly diminishes the aesthetic appeal of the furniture.

[0004] Therefore, improving and innovating to address these shortcomings is an urgent problem to be solved in the field of furniture decorative film. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-transmittance coating liquid, a high-transmittance decorative film, its preparation method and application.

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

[0007] In a first aspect, the present invention provides a high-transmittance coating liquid, comprising the following components in parts by weight: 50-70 parts of acrylate emulsion, 20-25 parts of water-soluble silica sol, 1-5 parts of coupling agent, 3-8 parts of ultraviolet shielding agent, 3-5 parts of filler, 1-5 parts of additives and 20-45 parts of water.

[0008] The acrylate emulsion comprises the following raw materials in parts by weight: 100 parts water, 10-15 parts hard monomer, 20-25 parts soft monomer, 15-20 parts functional monomer, 15-20 parts siloxane containing double bonds, 2-4 parts emulsifier, and 0.1-0.2 parts initiator, wherein the functional monomer is a composition of acryloylmorpholine, hexafluorobutyl methacrylate, and cyclotrimethylolpropane methyl acetal acrylate.

[0009] The coating solution of this invention improves the high light transmittance, abrasion resistance, and water resistance of the coating by preparing an acrylate emulsion using specific functional monomers. Specifically, the functional monomers are a composition of acrylomorpholine, hexafluorobutyl methacrylate, and cyclotrimethylolpropane methyl acetal acrylate. The polar morpholine groups in acrylomorpholine enhance the hydrogen bonding between molecular chains, improve the compatibility of the polymer with fillers and UV shielding agents, enhance coating toughness, prevent brittle fracture, and reduce phase separation and light scattering. Hexafluorobutyl methacrylate introduces fluorine atoms to reduce the surface energy of the coating, reducing surface defects. Furthermore, its fluorine-containing groups have low surface energy and low refractive index, effectively reducing light scattering and absorption, further improving the light transmittance after film formation. Cyclotrimethylolpropane methyl acetal acrylate has a polyhydroxy structure, which forms a dense cross-linked network during polymerization, significantly improving the hardness of the coating after film formation and reducing light absorption and scattering. This invention synergistically improves the light transmittance, abrasion resistance, and water resistance of the film through the three functional monomers. Furthermore, the introduction of siloxanes containing double bonds can further improve the flexibility and abrasion resistance of the membrane, synergistically enhancing the overall performance of the membrane with functional monomers. Meanwhile, UV shielding agents can absorb ultraviolet rays, preventing membrane aging and thus indirectly maintaining the membrane's light transmittance and abrasion resistance.

[0010] Preferably, the mass ratio of acryloylmorpholine, hexafluorobutyl methacrylate and cyclotrimethylolpropane methyl acetal acrylate is 1:(1-3):(3-5).

[0011] Preferably, the coupling agent is an aminosilane coupling agent.

[0012] Preferably, the filler is nano-silica.

[0013] Preferably, the additives include at least one of leveling agents, wetting agents, and defoamers.

[0014] Preferably, the hard monomer is styrene and vinyl acetate.

[0015] Preferably, the soft monomer is ethyl acrylate.

[0016] Preferably, the siloxane containing double bonds is vinyltris(β-methoxyethoxy)silane.

[0017] Preferably, the emulsifier is sodium dodecyl sulfate and / or alkylphenol polyoxyethylene ether. More preferably, the emulsifier is a composition of sodium dodecyl sulfate and alkylphenol polyoxyethylene ether in a mass ratio of 1:2.

[0018] Preferably, the initiator is dimethyl azobisisobutyrate.

[0019] Preferably, the method for preparing the acrylate emulsion includes the following steps:

[0020] (1) Mix and stir 50-60 wt% of component A to obtain a pre-emulsion, wherein component A is water, hard monomer, soft monomer, functional monomer, siloxane containing double bond and emulsifier;

[0021] (2) Mix the remaining component A with 25-35 wt% of initiator, heat to 80-85℃ and stir to obtain seed emulsion;

[0022] (3) Add the remaining initiator and pre-emulsion dropwise to the seed emulsion. After the addition is complete, stir the reaction, then heat to 85-90℃ and keep warm for 5-10 minutes. After cooling, adjust the pH value to 7.0-8.0, filter, collect the filtrate, and obtain the acrylate emulsion.

[0023] Preferably, in step (1), the stirring temperature is 60-70℃, the stirring speed is 200-400rpm, and the stirring time is 5-10min.

[0024] Preferably, in step (2), the stirring speed is 200-400 rpm and the stirring time is 5-10 min.

[0025] Preferably, in step (3), the temperature of the stirring reaction is 80-85℃, the stirring speed is 500-600rpm, and the stirring time is 30-60min.

[0026] Preferably, in step (3) of the method for preparing the acrylate emulsion, the dropping rate of the initiator and the pre-emulsion is 50-60 drops / min.

[0027] In a second aspect, the present invention provides a method for preparing the high-transmittance coating solution described in the first aspect, comprising the following steps:

[0028] S1. Mix the acrylic emulsion, water-soluble silica sol, and water, and stir until homogeneous to obtain the first slurry;

[0029] S2. Add filler, coupling agent and ultraviolet shielding agent to the first slurry, and stir until evenly dispersed to obtain the second slurry;

[0030] S3. Add additives to the second slurry and stir evenly to obtain the high-transmittance coating solution.

[0031] Thirdly, the present invention provides a high-transmittance decorative film, which is prepared by coating a substrate with the high-transmittance coating liquid described in the first aspect.

[0032] Fourthly, the present invention provides the application of the high light transmittance decorative film described in the third aspect in the preparation of furniture decorative films.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] The coating solution of this invention does not contain any organic solvents, making it environmentally friendly. By adding specific acrylate emulsions, water-soluble silica sols, coupling agents, UV shielding agents, and fillers, this invention enables the coating solution to form a relatively uniform and dense film. The resulting decorative film not only provides strong UV protection but also exhibits strong adhesion, abrasion resistance, and good light transmittance. The functional monomers of this acrylate emulsion include acryloylmorpholine, hexafluorobutyl methacrylate, and cyclotrimethylolpropane methyl acetal acrylate. Acryloylmorpholine enhances hydrogen bonding, improves coating toughness, and reduces phase separation and light scattering; hexafluorobutyl methacrylate lowers the surface energy of the coating, reduces surface defects, and decreases light scattering and absorption; cyclotrimethylolpropane methyl acetal acrylate forms a dense cross-linked network, increasing coating hardness and reducing light absorption and scattering. These three components synergistically enhance the high light transmittance, abrasion resistance, and water resistance of the coating. Detailed Implementation

[0035] To better illustrate the purpose, technical solution, and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0036] The reagents used in the following examples and comparative examples were sourced from the following sources:

[0037] Styrene: Manufacturer: Jinan Chuangshi Chemical Co., Ltd.; Purity: 99.5%;

[0038] Vinyl acetate: manufactured by Shandong Chuangying Chemical Co., Ltd., purity 99%;

[0039] Ethyl acrylate: Manufacturer: Guangdong Wengjiang Chemical Reagent Co., Ltd., Model: WB04626;

[0040] Acryloylmorpholine: Manufacturer: Guangdong Wengjiang Chemical Reagent Co., Ltd., Model: PB056571;

[0041] Hexafluorobutyl methacrylate: Manufacturer: Guangdong Wengjiang Chemical Reagent Co., Ltd., Model: PB04645;

[0042] Cyclotrimethylolpropane methyl acetal acrylate: Manufacturer: Guangdong Haohui New Materials Co., Ltd., Model: MR1104;

[0043] Vinyltris(β-methoxyethoxy)silane: Manufacturer: Guangzhou Aikepu New Materials Co., Ltd., Model: 172;

[0044] Sodium dodecyl sulfate: Manufacturer: Guangdong Wengjiang Chemical Reagent Co., Ltd., Model: PA008851;

[0045] Alkylphenol polyoxyethylene ether: Manufacturer: Guangdong Wengjiang Chemical Reagent Co., Ltd., Model: PB109671; Dimethyl azobisisobutyrate: Manufacturer: Guangdong Wengjiang Chemical Reagent Co., Ltd., Model: PC08007

[0046] Water-soluble silica sol: Manufacturer: Dongguan Heyi Nanomaterials Co., Ltd., Model: ZS-27, Silica content: 15%;

[0047] Aminosilane coupling agent: N-(3-triethoxysilylpropyl)amine, manufactured by Sisbo Organosilicon, model number: PC100;

[0048] UV shielding agent: Manufacturer: BASF, Model: CHIMASSORB 81;

[0049] Nano silica: Manufacturer: Evonik, Model: AEROSILA200, Particle size: 12nm;

[0050] Leveling agent: Manufacturer is BYK (Germany), model number is BYK-333;

[0051] Wetting agent: Polyether siloxane wetting agent, manufactured by Adresen, model ADDWET 6270;

[0052] Defoamer: Polyether defoamer, manufactured by Dongguan Defeng Defoamer Co., Ltd., model number DF-8201.

[0053] Unless otherwise specified, all other materials and reagents used in the examples are commercially available.

[0054] Example 1

[0055] A high-transmittance coating solution comprises the following components in parts by weight: 65 parts acrylate emulsion, 23 parts water-soluble silica sol, 4 parts coupling agent, 6 parts ultraviolet shielding agent, 4 parts filler, 1 part leveling agent, 1 part wetting agent, 1 part defoamer, and 32 parts water. The coupling agent is an aminosilane coupling agent, the filler is nano-silica, and the additives include a leveling agent, a wetting agent, and a defoamer. The wetting agent is a polyether siloxane wetting agent, and the defoamer is a polyether defoamer.

[0056] The acrylate emulsion comprises the following raw materials in parts by weight: 100 parts water, 12 parts hard monomer, 24 parts soft monomer, 16 parts functional monomer, 18 parts double-bonded siloxane, 3 parts emulsifier, and 0.15 parts initiator. The functional monomer is a composition of acryloylmorpholine, hexafluorobutyl methacrylate, and cyclotrimethylolpropane methyl acetal acrylate in a mass ratio of 1:2:4. The hard monomer is styrene and vinyl acetate. The soft monomer is ethyl acrylate. The double-bonded siloxane is vinyltris(β-methoxyethoxy)silane. The emulsifier is a composition of sodium dodecyl sulfate and alkylphenol polyoxyethylene ether in a mass ratio of 1:2. The initiator is dimethyl azobisisobutyrate.

[0057] The method for preparing the acrylate emulsion includes the following steps:

[0058] (1) 55wt% of component A is stirred at 65℃ and 300rpm for 10min to obtain a pre-emulsion, wherein component A is water, hard monomer, soft monomer, functional monomer, siloxane containing double bond and emulsifier.

[0059] (2) Mix the remaining component A with 30 wt% of initiator, heat to 80°C and stir at 300 rpm for 10 min to obtain seed emulsion;

[0060] (3) The remaining initiator and pre-emulsion were added dropwise to the seed emulsion at a rate of 55 drops / min. After the addition was complete, the mixture was stirred at 600 rpm at 85°C for 45 min. Then the temperature was raised to 90°C and kept at that temperature for 6 min. After cooling, the pH was adjusted to 7.5. The mixture was filtered and the filtrate was collected to obtain the acrylate emulsion.

[0061] The preparation method of the high-transmittance coating solution includes the following steps:

[0062] S1. Mix the acrylic emulsion, water-soluble silica sol, and water, and stir until homogeneous to obtain the first slurry;

[0063] S2. Add filler, coupling agent and ultraviolet shielding agent to the first slurry, and stir until evenly dispersed to obtain the second slurry;

[0064] S3. Add additives to the second slurry and stir evenly to obtain the high-transmittance coating solution.

[0065] Example 2

[0066] A high-transmittance coating solution comprises the following components in parts by weight: 50 parts acrylate emulsion, 20 parts water-soluble silica sol, 1 part coupling agent, 3 parts ultraviolet shielding agent, 3 parts filler, 0.5 parts leveling agent, 0.2 parts wetting agent, 0.3 parts defoamer, and 20 parts water. The coupling agent is an aminosilane coupling agent, the filler is nano-silica, and the additives include a leveling agent, a wetting agent, and a defoamer. The wetting agent is a polyether siloxane wetting agent, and the defoamer is a polyether defoamer.

[0067] The acrylate emulsion comprises the following raw materials in parts by weight: 100 parts water, 10 parts hard monomer, 20 parts soft monomer, 15 parts functional monomer, 15 parts double-bonded siloxane, 2 parts emulsifier, and 0.1 parts initiator. The functional monomer is a composition of acryloylmorpholine, hexafluorobutyl methacrylate, and cyclotrimethylolpropane methyl acetal acrylate in a mass ratio of 1:1:3. The hard monomer is styrene and vinyl acetate. The soft monomer is ethyl acrylate. The double-bonded siloxane is vinyltris(β-methoxyethoxy)silane. The emulsifier is sodium dodecyl sulfate, and the initiator is dimethyl azobisisobutyrate.

[0068] The method for preparing the acrylate emulsion includes the following steps:

[0069] (1) Stir 50wt% of component A at 60℃ and 200rpm for 10min to obtain a pre-emulsion, wherein component A is water, hard monomer, soft monomer, functional monomer, siloxane containing double bond and emulsifier.

[0070] (2) Mix the remaining component A with 25 wt% of initiator, heat to 80°C and stir at 200 rpm for 10 min to obtain seed emulsion;

[0071] (3) The remaining initiator and pre-emulsion were added to the seed emulsion at a rate of 50 drops / min. After the addition was completed, the mixture was stirred at 500 rpm at 80°C for 60 min. Then the temperature was raised to 85°C and kept at that temperature for 10 min. After cooling, the pH was adjusted to 7.0. The mixture was filtered and the filtrate was collected to obtain the acrylate emulsion.

[0072] The preparation method of the high-transmittance coating solution includes the following steps:

[0073] S1. Mix the acrylic emulsion, water-soluble silica sol, and water, and stir until homogeneous to obtain the first slurry;

[0074] S2. Add filler, coupling agent and ultraviolet shielding agent to the first slurry, and stir until evenly dispersed to obtain the second slurry;

[0075] S3. Add additives to the second slurry and stir evenly to obtain the high-transmittance coating solution.

[0076] Example 3

[0077] A high-transmittance coating solution comprises the following components in parts by weight: 70 parts acrylate emulsion, 25 parts water-soluble silica sol, 5 parts coupling agent, 8 parts ultraviolet shielding agent, 5 parts filler, 3 parts leveling agent, 3 parts wetting agent, 2 parts defoamer, and 45 parts water. The coupling agent is an aminosilane coupling agent, the filler is nano-silica, and the additives include a leveling agent, a wetting agent, and a defoamer. The wetting agent is a polyether siloxane wetting agent, and the defoamer is a polyether defoamer.

[0078] The acrylate emulsion comprises the following raw materials in parts by weight: 100 parts water, 15 parts hard monomer, 25 parts soft monomer, 20 parts functional monomer, 20 parts double-bonded siloxane, 4 parts emulsifier, and 0.2 parts initiator. The functional monomer is a composition of acryloylmorpholine, hexafluorobutyl methacrylate, and cyclotrimethylolpropane methyl acetal acrylate in a mass ratio of 1:3:5. The hard monomer is styrene and vinyl acetate. The soft monomer is ethyl acrylate. The double-bonded siloxane is vinyltris(β-methoxyethoxy)silane. The emulsifier is a composition of alkylphenol polyoxyethylene ethers. The initiator is dimethyl azobisisobutyrate.

[0079] The method for preparing the acrylate emulsion includes the following steps:

[0080] (1) Stir 60wt% of component A at 70℃ and 400rpm for 5min to obtain a pre-emulsion, wherein component A is water, hard monomer, soft monomer, functional monomer, siloxane containing double bond and emulsifier.

[0081] (2) Mix the remaining component A with 35 wt% of initiator, heat to 85°C and stir at 400 rpm for 5 min to obtain seed emulsion;

[0082] (3) The remaining initiator and pre-emulsion were added to the seed emulsion at a rate of 60 drops / min. After the addition was completed, the mixture was stirred at 85°C and 600 rpm for 30 min. Then the temperature was raised to 90°C and kept at that temperature for 5 min. After cooling, the pH was adjusted to 7.0-8.0. The mixture was filtered and the filtrate was collected to obtain the acrylate emulsion.

[0083] The preparation method of the high-transmittance coating solution includes the following steps:

[0084] S1. Mix the acrylic emulsion, water-soluble silica sol, and water, and stir until homogeneous to obtain the first slurry;

[0085] S2. Add filler, coupling agent and ultraviolet shielding agent to the first slurry, and stir until evenly dispersed to obtain the second slurry;

[0086] S3. Add additives to the second slurry and stir evenly to obtain the high-transmittance coating solution.

[0087] Example 4

[0088] The difference between Example 4 and Example 1 is that the amount of functional monomers added to the acrylate emulsion remains unchanged, and the mass ratio of acrylmorpholine, hexafluorobutyl methacrylate, and cyclotrimethylolpropane methyl acetal acrylate is 1:4:2.

[0089] Example 5

[0090] The difference between Example 5 and Example 1 is that the amount of functional monomers added to the acrylate emulsion remains unchanged, and the mass ratio of acrylmorpholine, hexafluorobutyl methacrylate, and cyclotrimethylolpropane methyl acetal acrylate is 2:1:4.

[0091] Comparative Example 1

[0092] The difference between Comparative Example 1 and Example 1 is that the amount of functional monomer added in the acrylate emulsion remains unchanged, acrylomorpholine is not added, and hexafluorobutyl methacrylate and cyclotrimethylolpropane methyl acetal acrylate with a mass ratio of 1:2 are used to make up for the missing amount.

[0093] Comparative Example 2

[0094] The difference between Comparative Example 2 and Example 1 is that the amount of functional monomers added in the acrylate emulsion remains unchanged, hexafluorobutyl methacrylate is not added, and acrylamide morpholine and cyclotrimethylolpropane methyl acetal acrylate with a mass ratio of 1:4 are used to make up for the missing amount.

[0095] Comparative Example 3

[0096] The difference between Comparative Example 3 and Example 1 is that the amount of functional monomer added in the acrylate emulsion remains unchanged, cyclotrimethylolpropane methyl acetal acrylate is not added, and acryloylmorpholine and hexafluorobutyl methacrylate with a mass ratio of 1:2 are used to make up for the missing amount.

[0097] Performance testing

[0098] The coating solutions from Examples 1-5 and Comparative Examples 1-3 were sprayed onto PET substrates, with the film thickness controlled at 15 μm. Each group of samples was then baked at 50°C for 5 minutes, followed by UV exposure in a UV chamber for 5 minutes at a UV energy of 650 mJ / cm². 2 This results in a decorative mask with high light transmittance.

[0099] The decorative face masks in each group were tested as follows:

[0100] 1. Abrasion resistance: RCA test, 175g, observe the number of times the abrasion is worn through to expose the PET substrate;

[0101] 2. Water resistance: Tested according to GB / T 1733-1993, water is boiled at 80℃, and the blistering time is observed;

[0102] 3. Transmittance test: A transmittance haze meter was used for testing. Specific data are shown in Table 1.

[0103] Table 1 Performance data of each group of decorative face mask samples

[0104]

[0105]

[0106] As shown in Table 1, and in conjunction with the data from Examples 1 and 4-5, it can be seen that when the mass ratio of acrylamide morpholine, hexafluorobutyl methacrylate, and cyclotrimethylolpropane methyl acetal acrylate in the functional monomers is 1:(1-3):(3-5), the water resistance, abrasion resistance, and light transmittance of the decorative film reach a relatively good level.

[0107] Based on the data from Example 1 and Comparative Examples 1-3, it can be seen that the type of functional monomers in the preparation of the acrylate emulsion is an important parameter affecting the water resistance, abrasion resistance, and light transmittance of the decorative film. When any one of acrylamide, hexafluorobutyl methacrylate, and cyclotrimethylolpropane methyl acetal acrylate is missing, the performance of the decorative film decreases significantly. This may be because acrylamide enhances hydrogen bonding, improves coating toughness, and reduces phase separation and light scattering; hexafluorobutyl methacrylate reduces coating surface energy, reduces surface defects, and reduces light scattering and absorption; and cyclotrimethylolpropane methyl acetal acrylate forms a dense cross-linked network, increases coating hardness, and reduces light absorption and scattering. The above three components synergistically improve the high light transmittance, abrasion resistance, and water resistance of the coating.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A high-transmittance coating solution, characterized in that, It includes the following components in parts by weight: 50-70 parts of acrylate emulsion, 20-25 parts of water-soluble silica sol, 1-5 parts of coupling agent, 3-8 parts of ultraviolet shielding agent, 3-5 parts of filler, 1-5 parts of additives and 20-45 parts of water. The acrylate emulsion comprises the following raw materials in parts by weight: 100 parts water, 10-15 parts hard monomer, 20-25 parts soft monomer, 15-20 parts functional monomer, 15-20 parts siloxane containing double bonds, 2-4 parts emulsifier, and 0.1-0.2 parts initiator. The functional monomer is a composition of acryloylmorpholine, hexafluorobutyl methacrylate, and cyclotrimethylolpropane methyl acetal acrylate, and the mass ratio of acryloylmorpholine, hexafluorobutyl methacrylate, and cyclotrimethylolpropane methyl acetal acrylate is 1:(1-3):(3-5).

2. The high-transmittance coating solution as described in claim 1, characterized in that, The coupling agent is an aminosilane coupling agent; and / or the filler is nano-silica.

3. The high-transmittance coating solution as described in claim 1, characterized in that, The additives include at least one of leveling agents, wetting agents, and defoamers.

4. The high-transmittance coating solution as described in claim 1, characterized in that, The raw materials used in the preparation are selected from at least one of (I)-(V): (I) The hard monomers are styrene and vinyl acetate; (II) The soft monomer is ethyl acrylate; (III) The siloxane containing double bonds is vinyltris(β-methoxyethoxy)silane; (IV) The emulsifier is sodium dodecyl sulfate and / or alkylphenol polyoxyethylene ether; (V) The initiator is dimethyl azobisisobutyrate.

5. The high-transmittance coating solution as described in claim 1, characterized in that, The method for preparing the acrylate emulsion includes the following steps: (1) Mix and stir 50-60 wt% of component A to obtain a pre-emulsion, wherein component A is water, hard monomer, soft monomer, functional monomer, siloxane containing double bond and emulsifier; (2) Mix the remaining component A with 25-35 wt% of initiator, heat to 80-85℃ and stir to obtain seed emulsion; (3) Add the remaining initiator and pre-emulsion to the seed emulsion. After the addition is complete, stir the reaction, then heat to 85-90℃ and keep warm for 5-10 minutes. After cooling, adjust the pH value to 7.0-8.0, filter, collect the filtrate, and obtain the acrylate emulsion.

6. The high-transmittance coating solution as described in claim 5, characterized in that, In step (3) of the method for preparing the acrylate emulsion, the dropping rate of the initiator and the pre-emulsion is 50-60 drops / min.

7. The method for preparing the high-transmittance coating solution according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Mix the acrylic emulsion, water-soluble silica sol, and water, and stir until homogeneous to obtain the first slurry; S2. Add filler, coupling agent and ultraviolet shielding agent to the first slurry, and stir until evenly dispersed to obtain the second slurry; S3. Add additives to the second slurry and stir evenly to obtain the high-transmittance coating solution.

8. A highly transparent decorative face mask, characterized in that, It is prepared by coating a substrate with the high-transmittance coating liquid according to any one of claims 1-6.

9. The application of the high-transmittance decorative film as described in claim 8 in the preparation of furniture decorative films.

Images