High-light-transmittance coating liquid, high-light-transmittance decorative mask and preparation method and application of high-light-transmittance decorative mask

Abstract

The invention relates to a high-transmittance coating liquid, a high-transmittance decorative mask and a preparation method and application thereof. The high-transmittance coating liquid is prepared from 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 a coupling agent, 3-8 parts of an ultraviolet screening agent, 3-5 parts of filler, 1-5 parts of an auxiliary agent and 20-45 parts of water, the acrylate emulsion is prepared from the following raw materials in parts by weight: 100 parts of water, 10 to 15 parts of a hard monomer, 20 to 25 parts of a soft monomer, 15 to 20 parts of a functional monomer, 15 to 20 parts of siloxane containing double bonds, 2 to 4 parts of an emulsifier and 0.1 to 0.2 part of an initiator, and the functional monomer is a composition of acryloyl morpholine, hexafluorobutyl methacrylate and cyclotrimethylolpropane methylal acrylate. The decorative mask obtained by the coating liquid has a relatively strong ultraviolet protection effect, relatively strong adhesive force and good wear resistance and light transmission.

Description

Technical Field

[0001] The present invention relates to the technical field of coating, and particularly relates to a high-transparency coating solution, a high-transparency decorative film, and a preparation method and application thereof. Background Art

[0002] In traditional coating solutions, there are often a large number of volatile organic solvents, such as toluene, ketones, etc. These organic solvents will volatilize into the air during use, not only causing environmental pollution, but also potentially triggering flammable risks and posing hidden dangers to production safety. At the same time, long-term exposure to these organic solvents may also have adverse effects on human health, such as irritating the respiratory tract, skin, etc., and may even cause more serious health problems.

[0003] Existing furniture decorative films have a series of obvious defects in practical applications. First of all, the application of traditional TiO 2 photocatalysts has great limitations. It only responds to ultraviolet light, and in a natural light environment, its efficiency is particularly low, making it difficult to meet the needs of daily use. Secondly, some fluorosurfactants, such as perfluorooctanoic acid, are added to some decorative films. These substances are highly toxic, not only posing a potential threat to human health, but also not conforming to the development trend of current environmental protection requirements. Moreover, the preparation process of multi-layer composite film layers is quite complex, requiring multiple processes and fine operations, which directly leads to an increase in production costs and increases the difficulty of market promotion. Finally, the light transmittance of the film layer is also an issue that cannot be ignored. The light transmittance of existing decorative films is generally less than 92%, which to a certain extent affects the decorative effect and greatly reduces the aesthetic appearance of furniture.

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

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a high-transparency coating solution, a high-transparency decorative film, and a preparation method and application thereof.

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

[0007] In the first aspect, the present invention provides a high-transparency coating solution, 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 light shielding agent, 3 - 5 parts of filler, 1 - 5 parts of auxiliary agent, and 20 - 45 parts of water;

[0008] The preparation raw materials of the acrylate emulsion include the following parts by weight: 100 parts of water, 10 - 15 parts of hard monomer, 20 - 25 parts of soft monomer, 15 - 20 parts of functional monomer, 15 - 20 parts of double bond-containing siloxane, 2 - 4 parts of emulsifier, and 0.1 - 0.2 parts of initiator. Among them, the functional monomer is a composition of acryloylmorpholine, hexafluorobutyl methacrylate, and trimethylolpropane formal acrylate.

[0009] The coating solution of the present invention prepares an acrylate emulsion by selecting specific functional monomers, thereby improving the high light transmittance, wear resistance, and water resistance of the coating. Specifically, the functional monomer is a composition of acryloylmorpholine, hexafluorobutyl methacrylate, and trimethylolpropane formal acrylate. The polar morpholine group contained in acryloylmorpholine can enhance the hydrogen bond interaction between molecular chains, improve the compatibility of the polymer with fillers and ultraviolet light shielding agents, enhance the toughness of the coating, avoid brittle fracture, and also reduce phase separation and light scattering. And hexafluorobutyl methacrylate reduces the surface energy of the coating by introducing fluorine atoms, reducing surface defects. At the same time, because its fluorine-containing group has the characteristics of low surface energy and low refractive index, it can effectively reduce the scattering and absorption of light, further improving the light transmittance after film formation. Trimethylolpropane formal acrylate has a polyhydroxy structure, which forms a dense cross-linked network during polymerization, can significantly improve the hardness of the coating after film formation, and also reduce light absorption and scattering. The present invention synergistically improves the light transmittance, wear resistance, and water resistance of the film through three functional monomers. In addition, the introduction of double bond-containing siloxane can further improve the flexibility and wear resistance of the film, and it synergistically enhances the comprehensive performance of the film with the functional monomer. And the ultraviolet light shielding agent can absorb ultraviolet light to prevent the aging of the film, thereby indirectly maintaining the light transmittance and wear resistance of the film.

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

[0011] Preferably, the coupling agent is an amino silane coupling agent.

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

[0013] Preferably, the auxiliary agent includes at least one of a leveling agent, a wetting agent, and an antifoaming agent.

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

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

[0016] Preferably, the double bond-containing siloxane is vinyl tris(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 with a mass ratio of 1:2.

[0018] Preferably, the initiator is dimethyl 2,2'-azobis(2-methylpropionate).

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

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

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

[0022] (3) Drop the remaining initiator and the pre-emulsion into the seed emulsion. After the dropping is completed, stir and react, then heat to 85 - 90 °C, keep warm for 5 - 10 min, adjust the pH value to 7.0 - 8.0 after cooling, filter, collect the filtrate to obtain the acrylate emulsion.

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

[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 stirring reaction temperature is 80 - 85 °C, the stirring reaction speed is 500 - 600 rpm, and the stirring reaction time is 30 - 60 min.

[0026] Preferably, in step (3) of the method for preparing the acrylate emulsion, the dropping speed 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-transparency coating solution described in the first aspect, comprising the following steps:

[0028] S1. Mix the acrylate emulsion, water-soluble silica sol, and water, and stir evenly to obtain a first slurry;

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

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

[0031] In a third aspect, the present invention provides a high-transparency decorative mask, which is prepared by coating the high-transparency coating solution described in the first aspect on a substrate.

[0032] In a fourth aspect, the present invention provides the application of the high-transparency decorative mask described in the third aspect in the preparation of furniture decorative masks.

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

[0034] The coating solution of the present invention does not contain organic solvents and has the characteristics of environmental protection. By adding specific components such as acrylate emulsion, water-soluble silica sol, coupling agent, ultraviolet shielding agent, and filler, the coating solution can form a relatively uniform and dense film layer. Finally, the obtained decorative mask not only has strong ultraviolet protection, but also has strong adhesion, wear resistance, and good light transmittance. The functional monomers of the acrylate emulsion include acryloylmorpholine, hexafluorobutyl methacrylate, and trimethylolpropane formal acrylate. Among them, acryloylmorpholine enhances hydrogen bonding, improves the toughness of the coating, reduces phase separation and light scattering; hexafluorobutyl methacrylate reduces the surface energy of the coating, reduces surface defects, and reduces light scattering and absorption; trimethylolpropane formal acrylate forms a dense cross-linked network, improves the hardness of the coating, and reduces light absorption and scattering. The above three components synergistically improve the high light transmittance, wear resistance, and water resistance of the coating. Specific Embodiments

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

[0036] The sources of the reagents used in the following examples and comparative examples are as follows:

[0037] Styrene: The manufacturer is Jinan Chuangshi Chemical Co., Ltd., and the purity is 99.5%;

[0038] Vinyl acetate: The manufacturer is Shandong Chuangying Chemical Co., Ltd., and the purity is 99%;

[0039] Ethyl acrylate: The manufacturer is Guangdong Wengjiang Chemical Reagent Co., Ltd., and the model is WB04626;

[0040] Acryloylmorpholine: The manufacturer is Guangdong Wengjiang Chemical Reagent Co., Ltd., and the model is PB056571;

[0041] Hexafluorobutyl methacrylate: The manufacturer is Guangdong Wengjiang Chemical Reagent Co., Ltd., and the model is PB04645;

[0042] Cyclotrimethylolpropane formal acrylate: The manufacturer is Guangdong Haohui New Materials Co., Ltd., and the model is MR1104;

[0043] Vinyltris(β-methoxyethoxy)silane: The manufacturer is Guangzhou Aikepu New Materials Co., Ltd., and the model is 172;

[0044] Sodium dodecyl sulfate: The manufacturer is Guangdong Wengjiang Chemical Reagent Co., Ltd., and the model is PA008851;

[0045] Alkylphenol polyoxyethylene ether: The manufacturer is Guangdong Wengjiang Chemical Reagent Co., Ltd., and the model is PB109671; Dimethyl 2,2'-azobis(2-methylpropionate): The manufacturer is Guangdong Wengjiang Chemical Reagent Co., Ltd., and the model is PC08007

[0046] Water-soluble silica sol: The manufacturer is Dongguan Heyi Nano Materials Co., Ltd., the model is ZS-27, and the silica content is 15%;

[0047] Aminosilane coupling agent: N-(3-triethoxysilylpropyl)amine, the manufacturer is SiSiB Organosilanes, and the model is PC100;

[0048] UV screening agent: The manufacturer is BASF, and the model is CHIMASSORB 81;

[0049] Nanosilica: The manufacturer is Evonik, the model is AEROSILA200, and the particle size is 12 nm;

[0050] Leveling agent: The manufacturer is BYK Chemie GmbH, and the model is BYK-333;

[0051] Wetting agent: Polyether siloxane wetting agent, the manufacturer is Addyson, and the model is ADDWET 6270;

[0052] Defoaming agent: Polyether defoaming agent, the manufacturer is Dongguan Defeng Defoaming Agent Co., Ltd., and the model is DF-8201.

[0053] Other materials, reagents, etc. used in the examples can be obtained from commercial sources without special instructions.

[0054] Example 1

[0055] A high-transparency coating solution comprises the following components in parts by weight: 65 parts of acrylate emulsion, 23 parts of water-soluble silica sol, 4 parts of coupling agent, 6 parts of UV screening agent, 4 parts of filler, 1 part of leveling agent, 1 part of wetting agent, 1 part of defoaming agent, and 32 parts of water, wherein the coupling agent is an aminosilane coupling agent, the filler is nanosilica, the additives include a leveling agent, a wetting agent, and a defoaming agent, the wetting agent is a polyether siloxane wetting agent, and the defoaming agent is a polyether defoaming agent.

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

[0057] The preparation method of the acrylic emulsion comprises the following steps:

[0058] (1) stirring 55 wt % of component A at 65° C. and 300 rpm for 10 min to obtain a pre-emulsion, wherein the component A comprises water, a hard monomer, a soft monomer, a functional monomer, a siloxane containing a double bond, and an emulsifier;

[0059] (2) mixing the remaining component A and 30 wt % of the initiator, heating to 80° C. and stirring at 300 rpm for 10 min to obtain a seed emulsion;

[0060] (3) The remaining initiator and pre-emulsion are added dropwise to the seed emulsion at a rate of 55 drops / min. After the addition is completed, the mixture is stirred at 85° C. and 600 rpm for 45 min, then the temperature is raised to 90° C. and kept warm for 6 min. After cooling, the pH value is adjusted to 7.5, filtered, and the filtrate is collected to obtain the acrylic ester emulsion.

[0061] The method for preparing the high-transmittance coating solution comprises the following steps:

[0062] S1, mixing acrylic emulsion, water-soluble silica sol and water, stirring evenly to obtain a first slurry;

[0063] S2, adding filler, coupling agent and ultraviolet shielding agent to the first slurry, stirring until uniformly dispersed, to obtain a second slurry;

[0064] S3, adding an auxiliary agent to the second slurry, stirring evenly, to obtain the high-transmittance coating solution.

[0065] Example 2

[0066] A high-transparency coating solution, comprising the following components in parts by weight: 50 parts of acrylate emulsion, 20 parts of water-soluble silica sol, 1 part of coupling agent, 3 parts of ultraviolet shielding agent, 3 parts of filler, 0.5 part of leveling agent, 0.2 part of wetting agent, 0.3 part of defoaming agent, and 20 parts of water. Among them, the coupling agent is an amino-silane coupling agent, the filler is nano-silica, the auxiliaries include a leveling agent, a wetting agent, and a defoaming agent, the wetting agent is a polyether-silicone wetting agent, and the defoaming agent is a polyether defoaming agent.

[0067] The acrylate emulsion comprises the following raw materials for preparation in parts by weight: 100 parts of water, 10 parts of hard monomer, 20 parts of soft monomer, 15 parts of functional monomer, 15 parts of double-bond-containing siloxane, 2 parts of emulsifier, and 0.1 part of initiator. Among them, the functional monomer is a composition of acryloylmorpholine, hexafluorobutyl methacrylate, and trimethylolpropane formal acrylate with a mass ratio of 1:1:3, the hard monomer is styrene and vinyl acetate, the soft monomer is ethyl acrylate, the double-bond-containing siloxane is vinyltris(β-methoxyethoxy)silane, the emulsifier is sodium dodecyl sulfate, and the initiator is dimethyl 2,2'-azobis(2-methylpropionate).

[0068] The preparation method of the acrylate emulsion comprises the following steps:

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

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

[0071] (3) Drop the remaining initiator and pre-emulsion into the seed emulsion at a rate of 50 drops / min. After dropping, stir and react at 80 °C and 500 rpm for 60 min, then heat to 85 °C, keep warm for 10 min, adjust the pH value to 7.0 after cooling, filter, and collect the filtrate to obtain the acrylate emulsion.

[0072] The preparation method of the high-transparency coating solution comprises the following steps:

[0073] S1. Mix the acrylate emulsion, water-soluble silica sol, and water, and stir evenly to obtain a first slurry.

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

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

[0076] Example 3

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

[0078] The acrylate emulsion comprises the following raw materials for preparation in parts by weight: 100 parts of water, 15 parts of hard monomer, 25 parts of soft monomer, 20 parts of functional monomer, 20 parts of double bond-containing siloxane, 4 parts of emulsifier and 0.2 part of initiator. Among them, the functional monomer is a composition of acryloylmorpholine, hexafluorobutyl methacrylate and trimethylolpropane formal acrylate with a mass ratio of 1:3:5, the hard monomer is styrene and vinyl acetate, the soft monomer is ethyl acrylate, the double bond-containing siloxane is vinyl tris(β-methoxyethoxy)silane, the emulsifier is a composition of alkylphenol polyoxyethylene ether, and the initiator is dimethyl azodisobutyrate.

[0079] The preparation method of the acrylate emulsion comprises the following steps:

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

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

[0082] (3) Drop the remaining initiator and pre-emulsion into the seed emulsion at a speed of 60 drops / min. After the dropping is completed, stir and react at 85 °C at a rotation speed of 600 rpm for 30 min, then heat up to 90 °C, keep warm for 5 min, adjust the pH value to 7.0 - 8.0 after cooling, filter, collect the filtrate to obtain the acrylate emulsion.

[0083] The preparation method of the high light transmittance coating solution comprises the following steps:

[0084] S1. Mix the acrylate emulsion, water-soluble silica sol and water, and stir evenly to obtain a first slurry;

[0085] S2. Add fillers, coupling agents, and UV shielding agents 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-transparency coating solution.

[0087] Example 4

[0088] The difference between Example 4 and Example 1 is that: the addition amount of the functional monomer in the acrylate emulsion remains unchanged, and the mass ratio of acryloylmorpholine, hexafluorobutyl methacrylate, and trimethylolpropane formal acrylate is 1:4:2.

[0089] Example 5

[0090] The difference between Example 5 and Example 1 is that: the addition amount of the functional monomer in the acrylate emulsion remains unchanged, and the mass ratio of acryloylmorpholine, hexafluorobutyl methacrylate, and trimethylolpropane formal acrylate is 2:1:4.

[0091] Comparative Example 1

[0092] The difference between Comparative Example 1 and Example 1 is that: the addition amount of the functional monomer in the acrylate emulsion remains unchanged, acryloylmorpholine is not added, and the mass ratio of hexafluorobutyl methacrylate and trimethylolpropane formal acrylate of 1:2 is used to make up the missing amount.

[0093] Comparative Example 2

[0094] The difference between Comparative Example 2 and Example 1 is that: the addition amount of the functional monomer in the acrylate emulsion remains unchanged, hexafluorobutyl methacrylate is not added, and the mass ratio of acryloylmorpholine and trimethylolpropane formal acrylate of 1:4 is used to make up the missing amount.

[0095] Comparative Example 3

[0096] The difference between Comparative Example 3 and Example 1 is that: the addition amount of the functional monomer in the acrylate emulsion remains unchanged, trimethylolpropane formal acrylate is not added, and the mass ratio of acryloylmorpholine and hexafluorobutyl methacrylate of 1:2 is used to make up the missing amount.

[0097] Performance Test

[0098] Spray the coating solutions of Examples 1-5 and Comparative Examples 1-3 on the PET substrate, control the film thickness to be 15 μm, then bake each group of samples at 50 °C for 5 min, and then place the baked samples in the UV chamber for 5 min, controlling the UV energy at 650 mJ / cm 2 , to obtain a high-transparency decorative film.

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

[0100] 1. Abrasion resistance: RCA test, 175 g, observe the number of times until the PET substrate is exposed after wear-through;

[0101] 2. Water resistance: Determined according to the method for determining the water resistance of paint films GB / T 1733-1993, boiled at 80 °C, observe the blistering time;

[0102] 3. Transmittance test: Tested using a transmittance and haze meter. The specific data are shown in Table 1.

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

[0104]

[0105]

[0106] As shown in Table 1, combining the data of Example 1 and Examples 4-5, it can be seen that when the mass ratio of morpholine acrylate, hexafluorobutyl methacrylate and trimethylolpropane formal acrylate in the functional monomer is 1:(1-3):(3-5), the water resistance, abrasion resistance and light transmittance performance of its decorative face mask reach a relatively excellent level.

[0107] Combining the data of Example 1 and Comparative Examples 1-3, it can be seen that the types of functional monomers in the preparation of acrylate emulsion are important parameters affecting the water resistance, abrasion resistance and light transmittance performance of the decorative face mask. When any one of morpholine acrylate, hexafluorobutyl methacrylate and trimethylolpropane formal acrylate is missing, the performance of the decorative face mask decreases significantly. This may be because morpholine acrylate enhances hydrogen bond interaction, improves the toughness of the coating, reduces phase separation and light scattering; hexafluorobutyl methacrylate reduces the surface energy of the coating, reduces surface defects, and reduces light scattering and absorption; trimethylolpropane formal acrylate forms a dense cross-linked network, improves the hardness of the coating, and reduces light absorption and scattering. The above three components synergistically improve the high light transmittance, abrasion resistance and water resistance of the coating film.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A high light transmittance coating solution, characterized in that: The invention comprises 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 auxiliary agent and 20-45 parts of water; The acrylic emulsion comprises the following raw materials in parts by weight: 100 parts of water, 10-15 parts of hard monomers, 20-25 parts of soft monomers, 15-20 parts of functional monomers, 15-20 parts of siloxane containing double bonds, 2-4 parts of emulsifiers and 0.1-0.2 parts of initiators, wherein the functional monomers are a combination of acryloylmorpholine, hexafluorobutyl methacrylate and cyclotrimethylolpropane formal acrylate.

2. The high light transmittance coating solution according to claim 1, characterized in that: The mass ratio of acryloylmorpholine, hexafluorobutyl methacrylate and cyclotrimethylolpropane formal acrylate is 1:(1-3):(3-5).

3. The high light transmittance coating solution according to claim 1, characterized in that: The coupling agent is an aminosilane coupling agent; and / or the filler is nano-silicon dioxide.

4. The high light transmittance coating solution according to claim 1, characterized in that: The auxiliary agent includes at least one of a leveling agent, a wetting agent and a defoaming agent.

5. The high light transmittance coating solution according to claim 1, characterized in that: The preparation raw material is 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 double bond-containing siloxane is vinyl tri(β-methoxyethoxy)silane; (IV) the emulsifier is sodium lauryl sulfate and / or alkylphenol polyoxyethylene ether; (V) The initiator is dimethyl azobisisobutyrate.

6. The high light transmittance coating solution according to claim 1, characterized in that: The preparation method of the acrylic emulsion comprises the following steps: (1) mixing and stirring 50-60 wt % of component A to obtain a pre-emulsion, wherein the component A comprises water, a hard monomer, a soft monomer, a functional monomer, a siloxane containing a double bond and an emulsifier; (2) mixing the remaining component A and 25-35 wt% of an initiator, heating to 80-85° C. and stirring to obtain a seed emulsion; (3) adding the remaining initiator and pre-emulsion dropwise to the seed emulsion, stirring for reaction after the addition is complete, then heating to 85-90° C., keeping the temperature for 5-10 min, adjusting the pH value to 7.0-8.0 after cooling, filtering, and collecting the filtrate to obtain the acrylic ester emulsion.

7. The high light transmittance coating solution according to claim 6, characterized in that: In step (3) of the method for preparing the acrylic ester emulsion, the dropping speed of the initiator and the pre-emulsion is 50-60 drops / min.

8. The method for preparing a high-transmittance coating solution according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, mixing acrylic emulsion, water-soluble silica sol and water, stirring evenly to obtain a first slurry; S2, adding filler, coupling agent and ultraviolet shielding agent to the first slurry, stirring until uniformly dispersed, to obtain a second slurry; S3, adding an auxiliary agent to the second slurry, stirring evenly, to obtain the high-transmittance coating solution.

9. A highly light-transmitting decorative mask, characterized in that: The high light transmittance coating liquid according to any one of claims 1 to 7 is coated on a substrate to prepare the coating.

10. Use of the highly light-transmittance decorative mask as claimed in claim 9 in preparing a furniture decorative mask.

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