A pearlescent art coating and its preparation method

Abstract

The present application relates to the field of coating technology, and specifically discloses a pearlescent color clay art paint and a preparation method thereof. A pearlescent color clay art paint is made from the following raw materials: 70-90 parts of a water-based acrylic resin emulsion, 0.1-0.3 parts of a defoamer, 0.2-0.5 parts of a leveling agent, 0.3-0.8 parts of a film-forming aid, 0.4-0.8 parts of a dispersant, 30-40 parts of water, 12-15 parts of an art color clay, and 3-7 parts of a modified pearlescent powder; the modified pearlescent powder is prepared by: S1, taking tri-n-butyl borate, anhydrous ethanol, and acetic acid, mixing and reacting, adding boron oxide powder and stirring to obtain a boron sol; taking tetraethyl orthosilicate and anhydrous ethanol, mixing, then adding water and glacial acetic acid, and heating to react to obtain a silica sol; S2, mixing the boron sol and the silica sol, adding a molybdenum oxide dispersion to obtain a modified treatment agent; S3, taking the pearlescent powder raw material, immersing it in the modified treatment agent, and heat-treating it after immersion to obtain it. The pearlescent colored mud art paint of the present application can exhibit excellent durability in natural environments and exert a relatively stable pearlescent effect.

Description

Technical Field

[0001] The present application relates to the field of coating technology, and more specifically, to a pearlescent colored mud artistic coating and a preparation method thereof. Background Art

[0002] Colored clay art paint is a new type of wall decoration material that combines the characteristics of art paint and wall cloth. It has strong artistic quality and rich color selection. It can create a variety of shapes and decorative effects, and has a sense of layering and three-dimensionality. It is suitable for various wall decoration needs, especially for consumers who pursue a personalized and fashionable home environment.

[0003] Adding pearlescent powder to colored clay art paint not only gives the coating a unique glossy effect, making the paint surface appear pearly, thereby greatly enhancing the paint's beauty and appeal, but also makes the coating surface smoother and more delicate, enhancing the overall texture of the coating, making the coating more upscale and high-quality, and can produce rich color effects to meet consumers' demand for personalized and diversified colors. Therefore, the pearlescent colored clay art paint obtained by applying pearlescent powder has a stronger decorative effect and visual appeal, and has won wide favor in the market.

[0004] Regarding the above-mentioned related technologies, the inventor believes that although pearl powder can provide the above-mentioned excellent application effects in pearlescent clay art paint, its durability may be affected by environmental factors. Long-term exposure to natural environments such as sunlight and high temperature may cause problems such as fading and aging of the coating. In order to maintain the bright effect of the coating, regular professional maintenance may be required, such as waxing, glazing, etc., to extend the service life of the coating, but this will greatly increase the maintenance cost.

[0005] Therefore, it is urgent to propose a solution to solve the above technical problems. Summary of the Invention

[0006] In order to improve the durability of pearlescent colored clay art paint in natural environments and to exhibit excellent and stable pearlescent effects, the present application provides a pearlescent colored clay art paint and a preparation method thereof.

[0007] In the first aspect, the present application provides a pearlescent colored mud art paint, which adopts the following technical solution:

[0008] A pearlescent colored mud art paint is prepared from the following raw materials in parts by weight:

[0009] 70-90 parts of water-based acrylic resin emulsion;

[0010] Defoaming agent 0.1-0.3 parts;

[0011] 0.2-0.5 parts of leveling agent;

[0012] 0.3-0.8 parts of film-forming aid;

[0013] Dispersant 0.4-0.8 parts;

[0014] 30-40 parts water;

[0015] 12-15 pieces of art clay;

[0016] 3-7 parts of modified pearlescent powder;

[0017] The modified pearlescent powder is prepared by the following steps:

[0018] S1, tri-n-butyl borate, anhydrous ethanol and acetic acid are mixed and stirred for reaction, and then boron oxide powder is added and stirred to obtain boron sol; simultaneously, ethyl orthosilicate and anhydrous ethanol are mixed, and then water and glacial acetic acid are added, and heated to react to obtain silica sol;

[0019] S2, mixing the boron sol and silica sol obtained in step S1, and then adding the molybdenum oxide dispersion to obtain a modified treatment agent;

[0020] S3, taking the pearl powder raw material and immersing it in the modifying agent obtained in step S2, and then performing heat treatment after immersion to obtain modified pearl powder.

[0021] By adopting the above technical solution, in the preparation of modified pearlescent powder, the boron sol and silica sol are mixed to form a B-Si-O network structure. This inorganic structure, when loaded on the pearlescent powder, effectively blocks ultraviolet penetration and reduces the high-temperature oxidation rate. The boron oxide powder not only replenishes the BO skeleton defects generated by the hydrolysis of tri-n-butyl borate, promoting the complete formation of a three-dimensional boron-oxygen network in the sol system, but also serves as a physical anchor point, enhancing the interfacial bonding strength after the boron sol and silica sol are mixed, promoting the uniform loading of the subsequent molybdenum oxide dispersion. Furthermore, after the boron sol and silica sol are mixed, a molybdenum oxide dispersion is added. This embeds the inorganic coating framework through Mo-O-Si bonds, combining with the B-Si-O network formed by the boron-silica sol. This effectively inhibits the crystal transformation of the pearlescent powder's metal oxide layer at high temperatures and reduces the photooxidative damage of the pearlescent powder to ultraviolet rays under sunlight. Furthermore, the molybdenum oxide dispersion optimizes the uniformity and interfacial bonding of the loading structure of the modifying agent on the pearlescent powder, ensuring the excellent interaction between the various raw materials in the modifying agent. In summary, by constructing a load structure with UV shielding, anti-oxidation and interface enhancement functions on the surface of pearlescent powder and applying it to pearlescent clay art paint, the durability of the obtained pearlescent clay art paint in natural environment can be significantly improved, thereby exhibiting an excellent and stable pearlescent effect.

[0022] Preferably, in step S1 of preparing the modified pearlescent powder, the weight ratio of tri-n-butyl borate, anhydrous ethanol and acetic acid is (4-6):(15-20):1, and the mass percentage of boron oxide powder in the boron sol is 10-15%.

[0023] By adopting the above technical solution, the above ratios of tri-n-butyl borate, anhydrous ethanol and acetic acid can ensure the solubility of tri-n-butyl borate in ethanol and the balance of hydrolysis reaction kinetics, and ensure the stability of the resulting boron sol system; and the amount of boron oxide powder used meets the interfacial bonding requirements of the boron sol and silica sol mixed system and can exert better corresponding effects; thus, the final modified pearlescent powder can have excellent quality.

[0024] Preferably, in the step S1 of preparing the modified pearlescent powder, the weight ratio of tetraethyl orthosilicate, anhydrous ethanol, water and glacial acetic acid is 1:(5-6):(0.8-1.2):(0.02-0.05).

[0025] By adopting the above technical solution, the above proportions of ethyl orthosilicate, anhydrous ethanol, water and glacial acetic acid can ensure the formation of a completely condensed Si-O-Si network and the stability of the resulting silica sol system, thereby achieving a better coordinated application effect with the boron sol and molybdenum oxide dispersion in subsequent applications, thereby ultimately obtaining modified pearlescent powder with excellent and stable quality.

[0026] Preferably, in step S2 of preparing the modified pearlescent powder, the weight ratio of boron sol, silica sol and molybdenum oxide dispersion is 6:(1.8-2.2):(1.8-2.0), wherein the mass percentage of molybdenum oxide in the molybdenum oxide dispersion is 1.2-1.5%.

[0027] By adopting the above technical solution, the above raw materials are used in combination and the synergistic effect exerted by each other is better, which can form a stable and uniform load structure on the surface of the pearlescent powder and exert an excellent and stable corresponding effect. As a result, after the modified pearlescent powder is applied, the obtained pearlescent colored mud art paint can exhibit excellent durability in the natural environment and exert a relatively stable pearlescent effect.

[0028] Preferably, the aqueous acrylic resin emulsion is an aqueous fluorosilicone-modified acrylic resin emulsion, and is prepared by the following steps:

[0029] After dissolving an emulsifier and sodium bicarbonate in water, an acrylate monomer, a silicon monomer, and a fluorine monomer are added and stirred to obtain a monomer pre-emulsion; 30-40% of the monomer pre-emulsion is then placed in a reaction vessel, nitrogen is introduced, and the temperature is increased, followed by the addition of an initiator and the addition of the remaining monomer pre-emulsion. The reaction is then maintained at this temperature, followed by cooling and adjusting the pH to neutral to obtain a water-based fluorine-silicone-modified acrylic resin emulsion;

[0030] The acrylate monomer consists of methyl methacrylate, butyl acrylate and acrylic acid;

[0031] The silicon monomer is vinyltriethoxysilane;

[0032] The fluorine monomer is hexafluorobutyl methacrylate.

[0033] By adopting the above technical solution, the CF bond of the fluorine monomer can effectively shield ultraviolet rays and reduce the photodegradation rate, and the silicon monomer forms a Si-O-Si network to improve the thermal stability of the coating; and the selection of methyl methacrylate, butyl acrylate and acrylic acid to form the acrylic monomer can make the polymer exhibit excellent hydrophilic and soft and hard properties, and ensure that the coating structure and the modified pearlescent powder can be tightly combined; vinyl triethoxysilane is selected as the silicon monomer, which can not only directly access the polymer main chain through free radical copolymerization to avoid local aggregation of silicon components, but also can partially serve as subsequent cross-linking sites to improve the density of the coating; hexafluorobutyl methacrylate is selected as the fluorine monomer, which has good compatibility with the acrylate monomer and exhibits excellent uniformity during the copolymerization process with the acrylate monomer, thereby bringing about an excellent fluorine bond introduction effect. Therefore, after application, the water-based fluorosilicone-modified acrylic resin emulsion prepared above not only exhibits excellent weather resistance, but also exhibits excellent compatibility with the modified pearlescent powder, and can further cooperate with the load structure on the surface of the modified pearlescent powder to exert a significant protective effect, thereby further improving the durability of the pearlescent clay art paint in the natural environment and exhibiting a more excellent and stable pearlescent effect.

[0034] Preferably, the weight ratio of the acrylate monomer, the silicon monomer and the fluorine monomer is (6-7):1:(2.5-3.5).

[0035] By adopting the above technical solution, a high proportion of acrylate monomers provides basic film-forming properties, regulates the glass transition temperature, and balances the flexibility and mechanical strength of the coating; the amount of fluorine monomer is moderate, which can avoid the decrease in compatibility caused by excessive introduction; the silicon monomer forms a Si-O-Si network through hydrolysis and condensation, thereby improving thermal stability, and the above amount can avoid the loss of control of the emulsion viscosity; therefore, when the acrylate monomer, silicon monomer and fluorine monomer in the above amount ratio are used in combination, not only can the film-forming properties of the acrylate, the surface function of the fluorine monomer and the network reinforcement of the silicon monomer be accurately balanced, but also the mutual combination between the water-based fluorine-silicone modified acrylic resin emulsion and the modified pearlescent powder can be ensured, and finally a pearlescent colored mud art paint with better durability in natural environment is obtained, and the pearlescent effect stability shown by its application is also better.

[0036] Preferably, the artistic colored clay is composed of raw materials including diatomaceous earth, high clay, pigment, nano calcium carbonate and talc.

[0037] By adopting the above technical solution, the artistic colored clay composed of the above raw materials can show excellent compatibility and bonding with other raw materials during the application process, and play an excellent role in the mixing system of pearlescent colored clay art paint, making the coating surface smoother and more delicate, and having a stronger texture, meeting the product characteristics requirements of pearlescent colored clay art paint.

[0038] In a second aspect, the present application provides a method for preparing pearlescent colored mud art paint, which adopts the following technical solution:

[0039] A method for preparing pearlescent colored mud art paint comprises the following steps:

[0040] (1) Prepare raw materials including water-based acrylic resin emulsion, defoaming agent, leveling agent, film-forming aid, dispersant, water, artistic color clay and modified pearl powder according to the proportion;

[0041] (2) After mixing the defoamer, leveling agent, dispersant and water in step (1), add water-based acrylic resin emulsion and mix and disperse them, then add artistic color mud and modified pearl powder and mix and disperse them, and finally add film-forming aid and mix and disperse them to obtain pearlescent color mud art paint.

[0042] By adopting the above technical solution, the above preparation method is simple to operate, and the raw materials are added step by step. Not only is the process easy to control quality, but it also allows the raw materials to fully combine and cooperate to exert excellent effects, thereby obtaining a pearlescent colored clay art paint with excellent and stable quality. In addition, the above preparation method of pearlescent colored clay art paint is also suitable for large-scale industrial production.

[0043] In summary, this application has the following beneficial effects:

[0044] 1. This application constructs a modified pearlescent powder on the surface of the pearlescent powder with a loading structure that combines UV shielding, anti-oxidation, and interface enhancement functions, and applies it to pearlescent color mud art paint. This can significantly improve the durability of the resulting pearlescent color mud art paint in natural environments, thereby exhibiting an excellent and stable pearlescent effect.

[0045] 2. The water-based fluorosilicone-modified acrylic resin emulsion prepared in this application is used in pearlescent clay art paint. In addition to being able to exhibit excellent weather resistance, it can also show excellent adaptability with the modified pearlescent powder, and synergistically exert a significant protective effect with the load structure on the surface of the modified pearlescent powder, thereby further improving the durability of the pearlescent clay art paint in natural environments and being able to exhibit a more excellent and stable pearlescent effect. DETAILED DESCRIPTION

[0046] The present application is further described in detail below with reference to preparation examples, embodiments and comparative examples.

[0047] Unless otherwise specified, the raw materials used in the preparation examples, embodiments and comparative examples of the present application are all commercially available.

[0048] The defoamer was purchased from BYK-021 defoamer from Germany;

[0049] The leveling agent was purchased from BYK-349 leveling agent in Germany;

[0050] The film-forming aid was purchased from Eastman Coal-forming Aid TEXANOL Alcohol Ester 12;

[0051] The dispersant was purchased from BYK-190 dispersant from Germany;

[0052] Pearlescent powder raw materials were purchased from Weiwei Caixiang Korea RC-1010D pearlescent powder;

[0053] The water-based acrylic resin emulsion was purchased from BASF as HPD 196 MEA AP water-based acrylic resin emulsion.

[0054] Preparation examples of raw materials and / or intermediates

[0055] Preparation Example 1

[0056] A modified pearlescent powder is prepared by the following steps:

[0057] S1. Tri-n-butyl borate, anhydrous ethanol, and acetic acid were mixed, stirred at 50°C for 10 hours, and then boron oxide powder was added and stirred to obtain a boron sol. Simultaneously, ethyl orthosilicate and anhydrous ethanol were mixed, and then water and glacial acetic acid were added, and the mixture was heated at 50°C for 10 hours to obtain a silica sol.

[0058] S2, mixing the boron sol and silica sol obtained in step S1, and then adding the molybdenum oxide dispersion to obtain a modified treatment agent;

[0059] S3. Take the pearl powder raw material at a weight ratio of 1:8 and immerse it in the modifying agent obtained in step S2. After soaking at 45° C. for 24 hours, heat treat it at a temperature of 260° C. for 35 minutes. After cooling, obtain modified pearl powder.

[0060] Note: In the above operation, in step S1, the weight ratio of tri-n-butyl borate, anhydrous ethanol, and acetic acid is 5:17.5:1, the mass percentage of boron oxide powder in the boron sol is 12.5%, and the particle size of the boron oxide powder is 40 nm (D50). The weight ratio of ethyl orthosilicate, anhydrous ethanol, water, and glacial acetic acid is 1:1.5:1:0.035. In step S2, the weight ratio of boron sol, silica sol, and molybdenum oxide dispersion is 6:2:1.9, the mass percentage of molybdenum oxide in the molybdenum oxide dispersion is 1.35%, and the dispersion medium of the molybdenum oxide dispersion is water. The particle size of the molybdenum oxide is 25 nm (D50).

[0061] Preparation Example 2

[0062] A modified pearlescent powder is different from Preparation Example 1 in that, in step S1, the weight ratio of tri-n-butyl borate, anhydrous ethanol and acetic acid is 4:15:1, and the mass percentage of boron oxide powder in the boron sol is 10%.

[0063] Preparation Example 3

[0064] A modified pearlescent powder is different from Preparation Example 1 in that, in step S1, the weight ratio of tri-n-butyl borate, anhydrous ethanol and acetic acid is 6:20:1, and the mass percentage of boron oxide powder in the boron sol is 15%.

[0065] Preparation Example 4

[0066] A modified pearlescent powder is different from Preparation Example 1 in that, in step S1, the weight ratio of tetraethyl orthosilicate, anhydrous ethanol, water and glacial acetic acid is 1:5:0.8:0.02.

[0067] Preparation Example 5

[0068] A modified pearlescent powder is different from Preparation Example 1 in that, in step S1, the weight ratio of tetraethyl orthosilicate, anhydrous ethanol, water and glacial acetic acid is 1:6:1.2:0.05.

[0069] Preparation Example 6

[0070] A modified pearlescent powder is different from Preparation Example 1 in that, in step S2, the weight ratio of boron sol, silica sol and molybdenum oxide dispersion is 6:1.8:1.8, wherein the mass percentage of molybdenum oxide in the molybdenum oxide dispersion is 1.2%.

[0071] Preparation Example 7

[0072] A modified pearlescent powder is different from Preparation Example 1 in that, in step S2, the weight ratio of boron sol, silica sol and molybdenum oxide dispersion is 6:2.2:2.0, wherein the mass percentage of molybdenum oxide in the molybdenum oxide dispersion is 1.5%.

[0073] Preparation Example 8

[0074] A modified pearlescent powder is different from the one prepared in Preparation Example 1 in that the modification agent does not contain boron sol.

[0075] Preparation Example 9

[0076] A modified pearlescent powder is different from the one prepared in Preparation Example 1 in that the modifying agent does not contain silica sol.

[0077] Preparation Example 10

[0078] A modified pearlescent powder is different from the one prepared in Preparation Example 1 in that the modified treatment agent does not contain a molybdenum oxide dispersion.

[0079] Preparation Example 11

[0080] A modified pearlescent powder is different from the one prepared in Preparation Example 1 in that the modification agent does not contain boron sol or silica sol.

[0081] Preparation Example 12

[0082] A modified pearlescent powder is different from the one prepared in Preparation Example 1 in that the modification agent does not contain boron sol or molybdenum oxide dispersion.

[0083] Preparation Example 13

[0084] A modified pearlescent powder is different from the one prepared in Preparation Example 1 in that the modification agent does not contain silica sol or molybdenum oxide dispersion.

[0085] Preparation Example 14

[0086] A water-based fluorosilicone-modified acrylic resin emulsion is prepared by the following steps:

[0087] An emulsifier and sodium bicarbonate are dissolved in 35 times the weight of water at a weight ratio of 5:1, and then an acrylate monomer, a silicone monomer, and a fluorine monomer are added and stirred to obtain a monomer pre-emulsion. 30-40% (35% is selected in this preparation example) of the monomer pre-emulsion is then placed in a reaction vessel, nitrogen is introduced, and the temperature is raised to 75°C. An initiator is then added, and the remaining monomer pre-emulsion is then added. The reaction is maintained at 85°C for 3 hours, then cooled to room temperature (25°C), and the pH is adjusted to neutral to obtain a water-based fluorosilicone-modified acrylic resin emulsion.

[0088] Note: In the above operation, the emulsifier is sodium lauryl sulfate, and the emulsifier dosage is 5% of the total weight of the acrylate monomer, silicone monomer, and fluorine monomer; the initiator is ammonium persulfate, and the initiator dosage is 0.5% of the total weight of the acrylate monomer, silicone monomer, and fluorine monomer; the acrylate monomer is composed of methyl methacrylate, butyl acrylate, and acrylic acid in a weight ratio of 50:45:5; the silicone monomer is vinyltriethoxysilane; and the fluorine monomer is hexafluorobutyl methacrylate. The weight ratio of the acrylate monomer, silicone monomer, and fluorine monomer is 6.5:1:3.

[0089] Preparation Example 15

[0090] A water-based fluorosilicone-modified acrylic resin emulsion is different from Preparation Example 14 in that the weight ratio of the acrylate monomer, the silicon monomer and the fluoro monomer is 6:1:2.5.

[0091] Preparation Example 16

[0092] A water-based fluorosilicone-modified acrylic resin emulsion is different from Preparation Example 14 in that the weight ratio of the acrylate monomer, the silicon monomer and the fluoro monomer is 7:1:3.5.

[0093] Example

[0094] Example 1

[0095] A pearlescent colored mud art paint, the raw materials used in its preparation and their corresponding weight parts are shown in Table 1, and it is prepared by the following steps:

[0096] (1) Prepare raw materials including water-based acrylic resin emulsion, defoaming agent, leveling agent, film-forming aid, dispersant, water, artistic color clay and modified pearl powder according to the proportion;

[0097] (2) After mixing the defoamer, leveling agent, dispersant and water in step (1), add water-based acrylic resin emulsion and mix and disperse them, then add artistic color mud and modified pearl powder and mix and disperse them, and finally add film-forming aid and mix and disperse them to obtain pearlescent color mud art paint.

[0098] Note: The artistic colored clay is composed of diatomaceous earth, high clay, pigment, nano-calcium carbonate and talc in a weight ratio of 2:1.5:0.5:1:1.5, wherein the pigment is titanium dioxide; the modified pearlescent powder is obtained in Preparation Example 1.

[0099] Example 2-3

[0100] A pearlescent colored mud art paint is different from Example 1 in that the raw materials used in its preparation and their corresponding weight parts are shown in Table 1.

[0101] Table 1 Raw materials used in the preparation of Examples 1-3 and their corresponding weight parts (parts / kg)

[0102]

[0103] Example 4

[0104] A pearlescent colored mud art paint, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 2.

[0105] Example 5

[0106] A pearlescent colored mud art paint, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 3.

[0107] Example 6

[0108] A pearlescent colored mud art paint, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 4.

[0109] Example 7

[0110] A pearlescent colored mud art paint, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 5.

[0111] Example 8

[0112] A pearlescent colored mud art paint, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 6.

[0113] Example 9

[0114] A pearlescent colored mud art paint, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 7.

[0115] Example 10

[0116] A pearlescent colored mud art paint, which is different from Example 1 in that the water-based acrylic resin emulsion is replaced by a water-based fluorosilicone modified acrylic resin emulsion, and the water-based fluorosilicone modified acrylic resin emulsion is obtained by Preparation Example 14.

[0117] Example 11

[0118] A pearlescent colored mud art paint, which is different from Example 1 in that the water-based acrylic resin emulsion is replaced by a water-based fluorosilicone modified acrylic resin emulsion, and the water-based fluorosilicone modified acrylic resin emulsion is obtained by Preparation Example 15.

[0119] Example 12

[0120] A pearlescent colored mud art paint, which is different from Example 1 in that the water-based acrylic resin emulsion is replaced by a water-based fluorosilicone modified acrylic resin emulsion, and the water-based fluorosilicone modified acrylic resin emulsion is obtained by Preparation Example 16.

[0121] Comparative Example

[0122] Comparative Example 1

[0123] A pearlescent colored mud art paint, which is different from Example 1 in that the modified pearlescent powder and other materials are replaced by pearlescent powder raw materials.

[0124] Comparative Example 2

[0125] A pearlescent colored mud art paint, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 8.

[0126] Comparative Example 3

[0127] A pearlescent colored mud art paint, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 9.

[0128] Comparative Example 4

[0129] A pearlescent colored mud art paint, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 10.

[0130] Comparative Example 5

[0131] A pearlescent colored mud art paint, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 11.

[0132] Comparative Example 6

[0133] A pearlescent colored mud art paint, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 12.

[0134] Comparative Example 7

[0135] A pearlescent colored mud art paint, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 13.

[0136] Comparative Example 8

[0137] A pearlescent colored mud art paint, which is different from Example 10 in that the modified pearlescent powder and other materials are replaced by pearlescent powder raw materials.

[0138] Performance testing

[0139] Test samples: The pearlescent colored clay art paint obtained in Examples 1-12 was selected as test sample 1-12, and the pearlescent colored clay art paint obtained in Comparative Example 1-8 was selected as control sample 1-8.

[0140] Test method: A standard metal plate (Q235 steel plate) with a thickness of 0.6 mm was selected as the test plate. Pearlescent color clay art paint was applied to the test plate surface with a wet film thickness of 100 μm. The plate was then placed in a standard environment (temperature 23 ± 2°C, humidity 50 ± 5% RH) and cured for 10 days to obtain a standard test sample.

[0141] The standard test sample was placed in an aging test chamber and illuminated with a xenon arc lamp (full spectrum simulation) according to the requirements of ASTM G155. The light intensity was set to 0.6W / m² @340nm, and a hot and humid alternating environment was simulated, i.e., illumination for 4 hours → condensation for 2 hours → spraying for 2 hours → natural drying for 1 hour. The temperature during the illumination phase was set at 60±3°C; the temperature during the condensation phase was set at 40±3°C; the water pressure during the spraying phase was 1MPa, the water temperature was 25±3°C, and the spray droplet diameter was controlled at 80μm. After the above cycle was continued for 540 hours, the aged test sample was obtained.

[0142] After aging, the color difference of different positions of the standard test sample is detected using a colorimeter. The average value of multiple measurements is recorded as the average color difference value (ΔE). The smaller the average color difference value (ΔE), the better the weather resistance of the pearlescent clay art paint and the more stable the pearlescent effect during the application process.

[0143] After performing the above tests on test samples 1-12 and control samples 1-8, the test results are recorded in Table 2.

[0144] Table 2 Test results of test samples 1-12 and control samples 1-8

[0145]

[0146] Combining Example 1 with Comparative Examples 1-7 and Table 2, it can be seen that the modified pearlescent powder obtained in this application, by constructing a loading structure on the pearlescent powder surface that combines UV shielding, antioxidant, and interface enhancement functions, and applying this structure to pearlescent colored clay art paint, can significantly improve the durability of the resulting pearlescent colored clay art paint in natural environments, thereby exhibiting an excellent and stable pearlescent effect. Furthermore, when the modified pearlescent powder is prepared using only one of boron sol, silica sol, and molybdenum oxide dispersion, or a mixture of two, as the modifying agent, the average color difference (ΔE) of the resulting modified pearlescent powder after application, as measured by the above test, is somewhat lower than that of the raw pearlescent powder, but the reduction is limited, and the effects of these modifications are merely a simple addition. Only when boron sol, silica sol, and molybdenum oxide dispersion are mixed together as the modifying agent can the excellent synergistic effect of the combined effect be achieved.

[0147] Combining Examples 1 and 10-12 with Table 2, it can be seen that replacing the waterborne acrylic resin emulsion with the waterborne fluorosilicone-modified acrylic resin emulsion prepared in this application can further improve the durability of the pearlescent clay art paint in natural environments, and the average color difference value (ΔE) obtained in the above test is also further reduced, indicating that the pearlescent clay art paint can exhibit a more excellent and stable pearlescent effect during application. Combining Comparative Examples 1 and 8 with Table 2, it can be seen that when the waterborne fluorosilicone-modified acrylic resin emulsion is used in combination with pearlescent powder raw materials, the corresponding improvement effect of replacing the waterborne fluorosilicone-modified acrylic resin emulsion with the waterborne fluorosilicone-modified acrylic resin emulsion is significantly reduced compared to the case where the waterborne fluorosilicone-modified acrylic resin emulsion is used in combination with modified pearlescent powder. This indicates that the waterborne fluorosilicone-modified acrylic resin emulsion and the loading structure of the modified pearlescent powder have a synergistic effect, resulting in a significant improvement effect of 1+1>2, thereby obtaining a pearlescent clay art paint with better application quality.

[0148] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A pearlescent clay art paint, characterized in that: Made from the following raw materials in parts by weight: 70-90 parts of water-based acrylic resin emulsion; Defoaming agent 0.1-0.3 parts; 0.2-0.5 parts of leveling agent; 0.3-0.8 parts of film-forming aid; Dispersant 0.4-0.8 parts; 30-40 parts water; 12-15 pieces of art clay; 3-7 parts of modified pearlescent powder; The modified pearlescent powder is prepared by the following steps: S1, tri-n-butyl borate, anhydrous ethanol and acetic acid are mixed and stirred for reaction, and then boron oxide powder is added and stirred to obtain boron sol; simultaneously, ethyl orthosilicate and anhydrous ethanol are mixed, and then water and glacial acetic acid are added, and heated to react to obtain silica sol; S2, mixing the boron sol and silica sol obtained in step S1, and then adding the molybdenum oxide dispersion to obtain a modified treatment agent; S3, taking the pearl powder raw material and immersing it in the modifying agent obtained in step S2, and then performing heat treatment after immersion to obtain modified pearl powder.

2. The pearlescent color mud art paint according to claim 1, characterized in that: In the preparation step S1 of the modified pearlescent powder, the weight ratio of tri-n-butyl borate, anhydrous ethanol and acetic acid is (4-6):(15-20):1, and the mass percentage of boron oxide powder in the boron sol is 10-15%.

3. The pearlescent color mud art paint according to claim 1, characterized in that: In the preparation step S1 of the modified pearlescent powder, the weight ratio of tetraethyl orthosilicate, anhydrous ethanol, water and glacial acetic acid is 1: (5-6): (0.8-1.2): (0.02-0.05).

4. The pearlescent color mud art paint according to claim 1, characterized in that: In the preparation step S2 of the modified pearlescent powder, the weight ratio of boron sol, silica sol and molybdenum oxide dispersion is 6:(1.8-2.2):(1.8-2.0), wherein the mass percentage of molybdenum oxide in the molybdenum oxide dispersion is 1.2-1.5%.

5. The pearlescent color mud art paint according to claim 1, characterized in that: The aqueous acrylic resin emulsion is an aqueous fluorosilicone-modified acrylic resin emulsion, and is prepared by the following steps: After dissolving an emulsifier and sodium bicarbonate in water, an acrylate monomer, a silicon monomer, and a fluorine monomer are added and stirred to obtain a monomer pre-emulsion; 30-40% of the monomer pre-emulsion is then placed in a reaction vessel, nitrogen is introduced, and the temperature is increased, followed by the addition of an initiator and the addition of the remaining monomer pre-emulsion. The reaction is then maintained at this temperature, followed by cooling and adjusting the pH to neutral to obtain a water-based fluorine-silicone-modified acrylic resin emulsion; The acrylate monomer consists of methyl methacrylate, butyl acrylate and acrylic acid; The silicon monomer is vinyltriethoxysilane; The fluorine monomer is hexafluorobutyl methacrylate.

6. The pearlescent color mud art paint according to claim 5, characterized in that: The weight ratio of the acrylic acid ester monomer, the silicon monomer and the fluorine monomer is (6-7):1:(2.5-3.5).

7. The pearlescent color mud art paint according to claim 1, characterized in that: The artistic colored clay consists of diatomaceous earth, high clay, pigment, nano calcium carbonate and talcum powder.

8. The method for preparing the pearlescent colored mud artistic paint according to claim 1, characterized in that: The following steps are involved: (1) Prepare water-based acrylic resin emulsion, defoamer, leveling agent, film-forming aid, dispersant, water, artistic color clay and modified pearl powder according to the proportion; (2) After mixing the defoamer, leveling agent, dispersant and water in step (1), add water-based acrylic resin emulsion and mix and disperse them, then add artistic color mud and modified pearl powder and mix and disperse them, and finally add film-forming aid and mix and disperse them to obtain pearlescent color mud art paint.

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