Beaded colored clay art coating and preparation method thereof

Abstract

The invention relates to the technical field of coatings, and particularly discloses a beaded colored clay art coating and a preparation method thereof. The invention relates to a beaded colored clay art coating which is prepared from the following raw materials: 70-90 parts of water-based acrylic resin emulsion, 0.1-0.3 part of a defoaming agent, 0.2-0.5 part of a flatting agent, 0.3-0.8 part of a coalescing agent, 0.4-0.8 part of a dispersing agent, 30-40 parts of water, 12-15 parts of art colored clay and 3-7 parts of modified pearl powder. The preparation method of the modified pearl powder comprises the following steps: S1, taking tri-n-butyl borate, absolute ethyl alcohol and acetic acid, carrying out mixing and stirring reaction, adding boron oxide powder, and stirring to obtain boron sol; mixing tetraethoxysilane and absolute ethyl alcohol, then adding water and glacial acetic acid, and carrying out heating reaction to obtain silica sol; s2, boron sol and silica sol are mixed, the molybdenum oxide dispersion liquid is added, and a modified treatment agent is obtained; s3, soaking a pearl powder raw material into the modification treatment agent, and performing heat treatment after soaking. The pearlescent colored clay art coating disclosed by the invention can show excellent durability in a natural environment, and exerts a relatively stable pearlescent effect.

Description

Technical Field

[0001] The present application relates to the technical field of coatings, and more specifically, to a pearlescent putty art coating and a preparation method thereof. Background Art

[0002] The putty art coating is a new type of wall decoration material that combines the characteristics of art coatings and wall coverings. It has extremely strong artistry and a rich color selection, can create a variety of shapes and decorative effects, has a sense of hierarchy and three-dimensionality, and is suitable for various wall decoration needs, especially for consumers who pursue a personalized and fashionable home environment.

[0003] Adding pearlescent powder to the putty art coating can not only endow the coating with a unique gloss effect, making the surface of the coating show a pearl-like luster, thus greatly improving the beauty and attractiveness of the coating, but also make the surface of the coating smoother and more delicate, enhance the overall texture of the coating, make the coating more upscale and quality-feeling, and can produce rich color effects to meet the consumers' personalized and diversified color requirements; therefore, the pearlescent putty art coating obtained by applying pearlescent powder has stronger decorative effects and visual attractiveness, and has won wide favor in the market.

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

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

[0006] In order to improve the durability of the pearlescent putty art coating in the natural environment and be able to exhibit excellent and stable pearlescent effects, the present application provides a pearlescent putty art coating and a preparation method thereof.

[0007] In a first aspect, the present application provides a pearlescent putty art coating, adopting the following technical solution: A pearlescent putty art coating is made from raw materials comprising the following parts by weight: 70 - 90 parts of an aqueous acrylic resin emulsion; 0.1 - 0.3 parts of an antifoaming agent; 0.2 - 0.5 parts of a leveling agent; 0.3 - 0.8 parts of a film-forming auxiliary agent; 0.4 - 0.8 parts of a dispersing agent; 30 - 40 parts of water; 12 - 15 parts of art modeling clay; 3 - 7 parts of modified pearlescent powder; The modified pearlescent powder is obtained through the following steps: S1. Take tributyl borate, absolute ethanol and acetic acid for mixing and stirring reaction, then add boron oxide powder and stir to obtain borosol; simultaneously, take tetraethyl orthosilicate and absolute ethanol, mix them, then add water and glacial acetic acid, and carry out a heating reaction to obtain silica sol; S2. After mixing the borosol and silica sol obtained in step S1, add molybdenum oxide dispersion liquid to obtain a modified treatment agent; S3. Immerse the pearlescent powder raw material in the modified treatment agent obtained in step S2, and carry out heat treatment after soaking to obtain the modified pearlescent powder.

[0008] By adopting the above technical solution, in the preparation of the modified pearlescent powder, after the borosol and silica sol are mixed, a B - Si - O network structure can be formed. This inorganic structure loaded on the pearlescent powder can effectively block the penetration of ultraviolet rays and reduce the high - temperature oxidation rate; among them, boron oxide powder can not only supplement the B - O framework defects generated by the hydrolysis of tributyl borate, promote the complete formation of the three - dimensional boron - oxygen network in the sol system, but also serve as a physical anchor to enhance the interfacial bonding strength after the mixing of borosol and silica sol, and promote the uniform loading of the subsequent molybdenum oxide dispersion liquid. At the same time, after the borosol and silica sol are mixed, molybdenum oxide dispersion liquid is added. By embedding through the Mo - O - Si bond into the inorganic coating framework and combining with the B - Si - O network formed by the borosilicate sol, it can effectively inhibit the crystal form transformation of the metal oxide layer of the pearlescent powder at high temperature and reduce the photo - oxidation damage of the ultraviolet rays to the pearlescent powder under sunlight irradiation; moreover, the molybdenum oxide dispersion liquid can also optimize the uniformity and interfacial bonding property of the loading structure of the modified treatment agent on the pearlescent powder, ensuring the excellent exertion of the mutual cooperation among the raw materials in the modified treatment agent. In summary, by building a load structure with functions of ultraviolet shielding, antioxidant and interface enhancement on the surface of the pearlescent powder and applying it to the pearl modeling clay art coating, the durability of the obtained pearl modeling clay art coating in the natural environment can be significantly improved, and then an excellent and stable pearlescent effect can be shown.

[0009] Preferably, in step S1 of the preparation of the modified pearlescent powder, the weight ratio of tributyl borate, absolute ethanol and acetic acid is (4 - 6):(15 - 20):1, and the mass percentage of boron oxide powder in the borosol is 10 - 15%.

[0010] By adopting the above technical solution, tributyl borate, absolute ethanol and acetic acid in the above proportions can ensure the solubility of tributyl borate in ethanol and the kinetic balance of the hydrolysis reaction, and ensure the stability of the resulting boron sol system; while the dosage of boron oxide powder meets the interfacial bonding requirements of the mixed system of boron sol and silica sol and can exert better corresponding effects; thus, the finally obtained modified pearlescent powder can have excellent quality.

[0011] Preferably, in the preparation step S1 of the modified pearlescent powder, the weight ratio of tetraethyl orthosilicate, absolute ethanol, water and glacial acetic acid is 1:(5 - 6):(0.8 - 1.2):(0.02 - 0.05).

[0012] By adopting the above technical solution, tetraethyl orthosilicate, absolute ethanol, water and glacial acetic acid in the above proportions can ensure the formation of a completely condensed Si - O - Si network and the stability of the resulting silica sol system, and then exert better cooperative application effects with boron sol and molybdenum oxide dispersion liquid during the subsequent application process, and finally obtain a modified pearlescent powder with excellent and stable quality.

[0013] Preferably, in the preparation step S2 of the modified pearlescent powder, the weight ratio of boron sol, silica sol and molybdenum oxide dispersion liquid is 6:(1.8 - 2.2):(1.8 - 2.0), and the mass percentage of molybdenum oxide in the molybdenum oxide dispersion liquid is 1.2 - 1.5%.

[0014] By adopting the above technical solution, the above raw material dosages are used in combination, and the synergistic effect exerted by their mutual cooperation is better. It can form a stable and uniform loading structure on the surface of the pearlescent powder and exert excellent and stable corresponding effects. Furthermore, after the obtained modified pearlescent powder is applied, the pearl-colored clay art paint obtained can show excellent durability in the natural environment and exert a relatively stable pearlescent effect.

[0015] Preferably, the aqueous acrylic resin emulsion is an aqueous fluorosilicon - modified acrylic resin emulsion and is obtained through the following steps: Take an emulsifier and sodium bicarbonate and dissolve them in water, then add acrylate monomers, silicon monomers and fluorine monomers and mix and stir to obtain a monomer pre - emulsion; then place 30 - 40% of the monomer pre - emulsion in a reaction vessel, introduce nitrogen and raise the temperature, add an initiator, then add the remaining monomer pre - emulsion, keep the temperature for reaction and then cool down, and adjust the pH to neutral to obtain the aqueous fluorosilicon - modified acrylic resin emulsion; The acrylate monomers are composed of methyl methacrylate, butyl acrylate and acrylic acid; The silicon monomer is vinyltriethoxysilane; The fluorine monomer is 2,2,3,3,4,4 - hexafluorobutyl methacrylate.

[0016] By adopting the above technical solutions, the C-F bond of the fluorine monomer can effectively shield ultraviolet rays and reduce the photodegradation rate. The silicon monomer forms a Si-O-Si network to enhance the thermal stability of the coating. The acrylic monomers composed of methyl methacrylate, butyl acrylate and acrylic acid can endow the polymer with excellent hydrophilic, hard and soft properties, and ensure a tight combination between the coating film structure and the modified pearlescent pigment. Vinyltriethoxysilane is selected as the silicon monomer, which can not only be directly incorporated into the polymer main chain through free radical copolymerization to avoid local aggregation of silicon components, but also partially serve as subsequent crosslinking sites to enhance the coating density. Hexafluorobutyl methacrylate is selected as the fluorine monomer, which has good compatibility with acrylate monomers and exhibits excellent uniformity during copolymerization with acrylate monomers, thus bringing excellent fluorine bond introduction effect. Therefore, after the prepared aqueous fluorosilicon-modified acrylic resin emulsion is applied, in addition to exhibiting excellent weather resistance, it can also show excellent compatibility with the modified pearlescent pigment, and then can cooperate with the load structure on the surface of the modified pearlescent pigment to play a significant protective role, further improving the durability of the pearl-colored putty art coating in the natural environment and showing a more excellent and stable pearlescent effect.

[0017] Preferably, the weight ratio of the acrylate monomer, the silicon monomer and the fluorine monomer is (6-7):1:(2.5-3.5).

[0018] By adopting the above technical solutions, the high proportion of acrylate monomer provides basic film-forming property, regulates the glass transition temperature, and balances the flexibility and mechanical strength of the coating. The dosage of the 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 to enhance the thermal stability, and the above dosage can avoid the out-of-control of the emulsion viscosity. Therefore, when the acrylate monomer, the silicon monomer and the fluorine monomer with the above dosage ratio are used in combination, they can not only precisely balance the film-forming property of acrylate, the surface function of the fluorine monomer and the network strengthening of the silicon monomer, but also ensure the mutual binding effect between the aqueous fluorosilicon-modified acrylic resin emulsion and the modified pearlescent pigment, and finally obtain a pearl-colored putty art coating with better durability in the natural environment, and its application shows better stability of the pearlescent effect.

[0019] Preferably, the artistic putty is composed of raw materials including diatomite, high clay, pigments, nano calcium carbonate and talc powder.

[0020] By adopting the above technical solutions, the artistic putty composed of the above raw materials can show excellent compatibility and binding property with other raw materials during the application process, and play an excellent self-role in the mixing system of the pearl-colored putty art coating, making the coating surface smoother, finer, and having stronger texture, meeting the product property requirements of the pearl-colored putty art coating.

[0021] In a second aspect, the present application provides a preparation method for a pearl-colored putty artistic coating, adopting the following technical solution: A preparation method for a pearl-colored putty artistic coating, comprising the following steps: (1) Prepare raw materials including an aqueous acrylic resin emulsion, an antifoaming agent, a leveling agent, a film-forming aid, a dispersant, water, artistic putty, and modified pearlescent powder according to the ratio; (2) After mixing the antifoaming agent, leveling agent, dispersant, and water in step (1), then adding the aqueous acrylic resin emulsion for mixing and dispersion, then adding the artistic putty and modified pearlescent powder for mixing and dispersion, and finally adding the film-forming aid for mixing and dispersion to obtain the pearl-colored putty artistic coating.

[0022] By adopting the above technical solution, the above preparation method is simple to operate, and the raw materials are added and used in steps. Not only is it easy to control the quality during the process, but also each raw material can be fully combined and cooperate to exert excellent effects, thereby obtaining a pearl-colored putty artistic coating with excellent and stable quality. At the same time, the above preparation method for the pearl-colored putty artistic coating is also applicable to large-scale industrial production.

[0023] In summary, the present application has the following beneficial effects: 1. The present application obtains modified pearlescent powder by building a load structure with ultraviolet shielding, antioxidant, and interface enhancement functions on the surface of the pearlescent powder and applying it to the pearl-colored putty artistic coating, which can significantly improve the durability of the obtained pearl-colored putty artistic coating in the natural environment, and thus exhibit excellent and stable pearlescent effects; 2. By using the prepared aqueous fluorosilicon-modified acrylic resin emulsion in the pearl-colored putty artistic coating, in addition to being able to exert excellent weather resistance, it can also exhibit excellent compatibility with the modified pearlescent powder and cooperate with the load structure on the surface of the modified pearlescent powder to exert a significant protective effect, further improving the durability of the pearl-colored putty artistic coating in the natural environment and being able to exhibit more excellent and stable pearlescent effects. Specific Embodiments

[0024] The following further elaborates on the present application in conjunction with preparation examples, examples, and comparative examples.

[0025] The raw materials used in each preparation example, example, and comparative example of the present application are all commercially available except as otherwise specified.

[0026] The antifoaming agent is purchased as the German BYK-021 antifoaming agent; The leveling agent is purchased as the German BYK-349 leveling agent; The film-forming aid is purchased as the Eastman film-forming aid TEXANOL alcohol ester 12; The dispersant is purchased as the German BYK-190 dispersant; The pearlescent powder raw material was purchased as the RC-1010D pearlescent powder from Weicaixiang, South Korea; The waterborne acrylic resin emulsion was purchased as the HPD 196 MEA AP waterborne acrylic resin emulsion from BASF.

[0027] Preparation Examples of Raw Materials and / or Intermediates Preparation Example 1 A modified pearlescent powder was obtained by the following steps: S1. Take tributyl borate, absolute ethanol and acetic acid and mix them. Stir and react at 50 °C for 10 h, then add boron oxide powder and stir to obtain boron sol; simultaneously, take tetraethyl orthosilicate and absolute ethanol and mix them, then add water and glacial acetic acid, and heat and react at 50 °C for 10 h to obtain silica sol; S2. After mixing the boron sol and silica sol obtained in step S1, add molybdenum oxide dispersion liquid to obtain a modified treatment agent; S3. Take the pearlescent powder raw material and immerse it in the modified treatment agent obtained in step S2 according to a weight ratio of 1:8. After soaking at 45 °C for 24 h, perform heat treatment. The heat treatment temperature is 260 °C, and the heat treatment time is 35 min. After cooling, the modified pearlescent powder is obtained.

[0028] Note: In the above operations, in step S1, the weight ratio of tributyl borate, absolute 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 tetraethyl orthosilicate, absolute 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 liquid is 6:2:1.9, where the mass percentage of molybdenum oxide in the molybdenum oxide dispersion liquid is 1.35%, and the dispersion medium of the molybdenum oxide dispersion liquid is water, and the particle size of molybdenum oxide is 25 nm (D50).

[0029] Preparation Example 2 A modified pearlescent powder, different from Preparation Example 1, in that in step S1, the weight ratio of tributyl borate, absolute ethanol and acetic acid is 4:15:1, and the mass percentage of boron oxide powder in the boron sol is 10%.

[0030] Preparation Example 3 A modified pearlescent powder, different from Preparation Example 1, in that in step S1, the weight ratio of tributyl borate, absolute ethanol and acetic acid is 6:20:1, and the mass percentage of boron oxide powder in the boron sol is 15%.

[0031] Preparation Example 4 A modified nacreous powder, which is different from Preparation Example 1 in that in step S1, the weight ratio of tetraethyl orthosilicate, absolute ethanol, water and glacial acetic acid is 1:5:0.8:0.02.

[0032] Preparation Example 5 A modified nacreous powder, which is different from Preparation Example 1 in that in step S1, the weight ratio of tetraethyl orthosilicate, absolute ethanol, water and glacial acetic acid is 1:6:1.2:0.05.

[0033] Preparation Example 6 A modified nacreous powder, which 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, and the mass percentage of molybdenum oxide in the molybdenum oxide dispersion is 1.2%.

[0034] Preparation Example 7 A modified nacreous powder, which 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, and the mass percentage of molybdenum oxide in the molybdenum oxide dispersion is 1.5%.

[0035] Preparation Example 8 A modified nacreous powder, which is different from Preparation Example 1 in that the modified treatment agent does not contain boron sol.

[0036] Preparation Example 9 A modified nacreous powder, which is different from Preparation Example 1 in that the modified treatment agent does not contain silica sol.

[0037] Preparation Example 10 A modified nacreous powder, which is different from Preparation Example 1 in that the modified treatment agent does not contain molybdenum oxide dispersion.

[0038] Preparation Example 11 A modified nacreous powder, which is different from Preparation Example 1 in that the modified treatment agent does not contain boron sol and silica sol.

[0039] Preparation Example 12 A modified nacreous powder, which is different from Preparation Example 1 in that the modified treatment agent does not contain boron sol and molybdenum oxide dispersion.

[0040] Preparation Example 13 A modified nacreous powder, which is different from Preparation Example 1 in that the modified treatment agent does not contain silica sol and molybdenum oxide dispersion.

[0041] Preparation Example 14 An aqueous fluorosilicon-modified acrylic resin emulsion is prepared by the following steps: Dissolve the emulsifier and sodium bicarbonate in water at a weight ratio of 5:1 and 35 times the weight of water, then add acrylate monomers, silicon monomers and fluorine monomers and mix and stir to obtain a monomer pre-emulsion; then place 30-40% (35% is selected in this preparation example) of the monomer pre-emulsion in a reaction vessel, introduce nitrogen and heat to 75 °C, add an initiator, then add the remaining monomer pre-emulsion, keep the temperature at 85 °C for 3 h and then cool to room temperature of 25 °C, and adjust the pH to neutral to obtain an aqueous fluorosilicon-modified acrylic resin emulsion; Note: In the above operations, the emulsifier is sodium dodecyl sulfate, and the dosage of the emulsifier is 5% of the total weight of the acrylate monomers, silicon monomers and fluorine monomers; the initiator is ammonium persulfate, and the dosage of the initiator is 0.5% of the total weight of the acrylate monomers, silicon monomers and fluorine monomers; the acrylate monomers are composed of methyl methacrylate, butyl acrylate and acrylic acid at a weight ratio of 50:45:5; the silicon monomer is vinyltriethoxysilane; the fluorine monomer is hexafluorobutyl methacrylate. The weight ratio of the acrylate monomers, silicon monomers and fluorine monomers is 6.5:1:3.

[0042] Preparation Example 15 An aqueous fluorosilicon-modified acrylic resin emulsion, different from Preparation Example 14 in that the weight ratio of the acrylate monomers, silicon monomers and fluorine monomers is 6:1:2.5.

[0043] Preparation Example 16 An aqueous fluorosilicon-modified acrylic resin emulsion, different from Preparation Example 14 in that the weight ratio of the acrylate monomers, silicon monomers and fluorine monomers is 7:1:3.5.

[0044] Examples Example 1 A pearl-colored clay art coating, the raw materials used in its preparation and their corresponding weight parts are shown in Table 1, and it is obtained through the following steps: (1) Prepare raw materials including an aqueous acrylic resin emulsion, an antifoaming agent, a leveling agent, a film-forming aid, a dispersant, water, art clay and modified pearlescent powder according to the ratio; (2) After mixing the antifoaming agent, leveling agent, dispersant and water in step (1), then add the aqueous acrylic resin emulsion for mixing and dispersing, then add art clay and modified pearlescent powder for mixing and dispersing, and finally add the film-forming aid for mixing and dispersing to obtain a pearl-colored clay art coating.

[0045] Note: The art clay is composed of diatomite, high clay, pigment, nano calcium carbonate and talc at a weight ratio of 2:1.5:0.5:1:1.5, where the pigment is titanium dioxide; the modified pearlescent powder is obtained from Preparation Example 1.

[0046] Examples 2-3 A pearl-effect putty art coating, which is different from that of Example 1 in that the raw materials used in its preparation and their corresponding parts by weight are shown in Table 1.

[0047] Table 1 Raw materials used in the preparation of Examples 1-3 and their corresponding parts by weight (parts / kg) Example 4 A pearl-effect putty art coating, which is different from that of Example 1 in that the modified pearlescent powder is obtained from Preparation Example 2.

[0048] Example 5 A pearl-effect putty art coating, which is different from that of Example 1 in that the modified pearlescent powder is obtained from Preparation Example 3.

[0049] Example 6 A pearl-effect putty art coating, which is different from that of Example 1 in that the modified pearlescent powder is obtained from Preparation Example 4.

[0050] Example 7 A pearl-effect putty art coating, which is different from that of Example 1 in that the modified pearlescent powder is obtained from Preparation Example 5.

[0051] Example 8 A pearl-effect putty art coating, which is different from that of Example 1 in that the modified pearlescent powder is obtained from Preparation Example 6.

[0052] Example 9 A pearl-effect putty art coating, which is different from that of Example 1 in that the modified pearlescent powder is obtained from Preparation Example 7.

[0053] Example 10 A pearl-effect putty art coating, which is different from that of Example 1 in that the waterborne acrylic resin emulsion is replaced with an equal mass of a waterborne fluorosilicon-modified acrylic resin emulsion, and the waterborne fluorosilicon-modified acrylic resin emulsion is obtained from Preparation Example 14.

[0054] Example 11 A pearl-effect putty art coating, which is different from that of Example 1 in that the waterborne acrylic resin emulsion is replaced with an equal mass of a waterborne fluorosilicon-modified acrylic resin emulsion, and the waterborne fluorosilicon-modified acrylic resin emulsion is obtained from Preparation Example 15.

[0055] Example 12 A pearl-effect putty art coating, which is different from that of Example 1 in that the waterborne acrylic resin emulsion is replaced with an equal mass of a waterborne fluorosilicon-modified acrylic resin emulsion, and the waterborne fluorosilicon-modified acrylic resin emulsion is obtained from Preparation Example 16.

[0056] Comparative Example Comparative Example 1 A pearl-colored putty art coating, which is different from Example 1 in that the modified pearlescent powder is replaced with the pearlescent powder raw material in equal mass.

[0057] Comparative Example 2 A pearl-colored putty art coating, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 8.

[0058] Comparative Example 3 A pearl-colored putty art coating, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 9.

[0059] Comparative Example 4 A pearl-colored putty art coating, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 10.

[0060] Comparative Example 5 A pearl-colored putty art coating, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 11.

[0061] Comparative Example 6 A pearl-colored putty art coating, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 12.

[0062] Comparative Example 7 A pearl-colored putty art coating, which is different from Example 1 in that the modified pearlescent powder is obtained from Preparation Example 13.

[0063] Comparative Example 8 A pearl-colored putty art coating, which is different from Example 10 in that the modified pearlescent powder is replaced with the pearlescent powder raw material in equal mass.

[0064] Performance Detection Test Test Samples: The pearl-colored putty art coatings obtained in Examples 1 - 12 were selected as Test Samples 1 - 12, and the pearl-colored putty art coatings obtained in Comparative Examples 1 - 8 were selected as Control Samples 1 - 8.

[0065] Test Method: A standard metal plate (Q235 steel plate) with a thickness of 0.6 mm was selected as the test plate; the pearl-colored putty art coating was applied to the surface of the test plate, and the wet film thickness was controlled to be 100 μm, and then it was cured for 10 days in a standard environment (temperature 23 ± 2°C, humidity 50 ± 5%RH) to obtain a standard test sample; Place the standard test sample in an aging test chamber, and select a xenon arc lamp (full-spectrum simulation) for light exposure according to the requirements in ASTM G155. Set the light intensity to 0.6 W / m² @340 nm, and simulate the alternating humid and hot environment, that is, light exposure for 4 h → condensation for 2 h → spraying for 2 h → natural drying for 1 h. Among them, the temperature is set to 60±3 °C during the light exposure stage; the temperature is set to 40±3 °C during the condensation stage; the water pressure during the spraying stage is 1 MPa, the water temperature is 25±3 °C, and the diameter of the sprayed liquid droplets is controlled within 80 μm; after the above cycle lasts for 540 h, the aged test sample is obtained; Use a color difference meter to detect the color difference values at different positions of the aged test sample of the standard test sample, and take the average value of multiple measurements as the average color difference value (ΔE). The smaller the average color difference value (ΔE), the better the weather resistance of the pearl-effect mud art coating, and the more stable the pearl effect shown during the application process.

[0066] After the above tests are carried out on test samples 1-12 and control samples 1-8, record the test results correspondingly in Table 2.

[0067] Table 2 Test results of test samples 1-12 and control samples 1-8 Combined with Example 1 and Comparative Examples 1-7 and Table 2, it can be seen that in this application, a modified pearlescent powder is obtained by building a load structure with ultraviolet shielding, antioxidant and interface enhancement functions on the surface of the pearlescent powder, and applying it to the pearl-effect mud art coating can significantly improve the durability of the obtained pearl-effect mud art coating in the natural environment, and then show an excellent and stable pearl effect. At the same time, if only any one or two of borax sol, silica sol and molybdenum oxide dispersion are used as the modification treatment agent in the preparation of the modified pearlescent powder, although the average color difference value (ΔE) obtained after the above tests of the obtained modified pearlescent powder after application is lower than that of the pearlescent powder raw material to a certain extent, the reduction range is limited, and only a simple superposition of the corresponding effects can be brought about among them. Only when borax sol, silica sol and molybdenum oxide dispersion are used together as the modification treatment agent can an excellent compound synergistic effect be exerted.

[0068] Combined with Example 1 and Examples 10-12 and in combination with Table 2, it can be seen that if the waterborne acrylic resin emulsion is replaced with the waterborne fluorosilicon-modified acrylic resin emulsion prepared in this application in equal mass, the durability of the pearl-colored putty art paint in the natural environment can be further improved, and the average color difference (ΔE) obtained through the above tests is also further reduced, indicating that the pearl-colored putty art paint can exhibit a more excellent and stable pearlescent effect during the application process. Combining Comparative Example 1 and Comparative Example 8 and in combination with Table 2, it can be seen that when the waterborne fluorosilicon-modified acrylic resin emulsion is applied with the pearlescent powder raw material, it is found that compared with the case where the waterborne fluorosilicon-modified acrylic resin emulsion is applied with the modified pearlescent powder, the corresponding improvement effect brought by replacing the waterborne acrylic resin emulsion with the waterborne fluorosilicon-modified acrylic resin emulsion in equal mass will be significantly reduced, indicating that the waterborne fluorosilicon-modified acrylic resin emulsion and the loading structure on the surface of the modified pearlescent powder have a synergistic effect, which can bring a significant improvement effect of 1+1>2, and thus a pearl-colored putty art paint with better application quality is obtained.

[0069] This specific embodiment is only an interpretation of the present application, and it is not a limitation of the present application. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A pearlescent colored clay art coating, characterized in that, It is made from raw materials including the following parts by weight: 70 - 90 parts of aqueous acrylic resin emulsion; 0.1 - 0.3 part of defoamer; 0.2 - 0.5 part of leveling agent; 0.3 - 0.8 part of film-forming auxiliary; 0.4 - 0.8 part of dispersant; 30 - 40 parts of water; 12 - 15 parts of artistic plasticine; 3 - 7 parts of modified pearlescent powder; The modified pearlescent powder is obtained through the following steps: S1. Take tributyl borate, absolute ethanol and acetic acid for mixing and stirring reaction, then add boron oxide powder and stir to obtain borosol; simultaneously, take tetraethyl orthosilicate and absolute ethanol, mix them, then add water and glacial acetic acid, and carry out heating reaction to obtain silica sol; S2. After mixing the borosol and silica sol obtained in step S1, add molybdenum oxide dispersion liquid to obtain a modified treatment agent; S3. Immerse the pearlescent powder raw material into the modified treatment agent obtained in step S2, and carry out heat treatment after soaking to obtain the modified pearlescent powder.

2. The pearlescent putty artistic coating according to claim 1, characterized in that: In step S1 of the preparation process of the modified pearlescent powder, the weight ratio of tributyl borate, absolute ethanol and acetic acid is (4 - 6):(15 - 20):1, and the mass percentage of boron oxide powder in the borosol is 10 - 15%.

3. The pearlescent art coating according to claim 1, wherein: In step S1 of the preparation process of the modified pearlescent powder, the weight ratio of tetraethyl orthosilicate, absolute ethanol, water and glacial acetic acid is 1:(5 - 6):(0.8 - 1.2):(0.02 - 0.05).

4. The pearlescent putty art coating according to claim 1, wherein: In step S2 of the preparation process of the modified pearlescent powder, the weight ratio of borosol, silica sol and molybdenum oxide dispersion liquid is 6:(1.8 - 2.2):(1.8 - 2.0), and the mass percentage of molybdenum oxide in the molybdenum oxide dispersion liquid is 1.2 - 1.5%.

5. The pearlescent putty art coating according to claim 1, wherein: The aqueous acrylic resin emulsion is an aqueous fluorosilicon-modified acrylic resin emulsion, and is obtained through the following steps: Take an emulsifier and sodium bicarbonate, dissolve them in water, then add acrylate monomers, silicon monomers and fluorine monomers and mix and stir to obtain a monomer pre-emulsion; then place 30 - 40% of the monomer pre-emulsion in a reaction vessel, introduce nitrogen and raise the temperature, add an initiator, then add the remaining monomer pre-emulsion, keep the temperature for reaction and then cool down, and adjust the pH to neutral to obtain the aqueous fluorosilicon-modified acrylic resin emulsion; The acrylate monomers are composed of methyl methacrylate, butyl acrylate and acrylic acid; The silicon monomer is vinyltriethoxysilane; The fluorine monomer is hexafluorobutyl methacrylate.

6. The pearlescent putty art coating according to claim 5, characterized in that: The weight ratio of the acrylate monomers, silicon monomers and fluorine monomers is (6 - 7):1:(2.5 - 3.5).

7. The pearlescent putty artistic coating according to claim 1, characterized in that: The artistic plasticine is composed of raw materials including diatomite, high clay, pigments, nano calcium carbonate and talc powder.

8. The preparation method of the pearl-colored putty artistic coating according to claim 1, characterized in that: It includes the following steps: (1) Prepare raw materials including aqueous acrylic resin emulsion, defoamer, leveling agent, film-forming auxiliary, dispersant, water, artistic plasticine and modified pearlescent powder according to the ratio; (2) After mixing the defoamer, leveling agent, dispersant and water in step (1), then add the aqueous acrylic resin emulsion for mixing and dispersion, then add the artistic plasticine and modified pearlescent powder for mixing and dispersion, and finally add the film-forming auxiliary for mixing and dispersion to obtain the pearl-colored clay artistic coating.

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