A water-based art paint and a method for preparing the same

Abstract

The application discloses a water-based artistic paint and a preparation method thereof, and belongs to the field of paints. The water-based artistic paint comprises the following components in percentage by weight: 9-16% of a silicone-acrylate resin emulsion; 2-5% of titanium white powder; 25-30% of calcium carbonate; 8-12% of sand; 6-9% of a titanium white powder-calcium carbonate compound; 3-6% of a titanium white powder-sand compound; 2-4% of cellulose or a derivative thereof; 2.5-4% of an additive; and the balance of water. The application has the effects of improving the storage stability of the water-based artistic paint and the durability of the paint film after forming.

Description

Technical Field

[0001] This application relates to the field of coatings, and in particular to a water-based artistic paint and its preparation method. Background Technology

[0002] Artistic paint is an important element of home decoration, adding a unique style while enhancing the overall aesthetics and texture. With increasing demands for healthy home environments, the materials used in artistic paint are becoming more environmentally friendly, leading to a growing market demand for water-based artistic paint and higher performance requirements.

[0003] To give water-based artistic paints a good aesthetic and texture, their composition generally includes pigments, fillers, and sand. Pigments and fillers provide basic color and can cover the color or imperfections on the substrate surface by scattering or absorbing light; sand can create a delicate sandstone texture, making the paint film surface feel warm to the touch.

[0004] However, since water-based artistic paints use water as a solvent, pigments, fillers, and sands are prone to agglomeration in water, which disrupts the colloidal balance of the system and affects the storage stability of the water-based artistic paint and the durability of the paint film after it is formed. Summary of the Invention

[0005] In order to improve the storage stability and durability of water-based artistic paint after film formation, this application provides a water-based artistic paint and its preparation method.

[0006] Firstly, the water-based artistic paint provided in this application adopts the following technical solution:

[0007] A water-based artistic paint comprising the following components by weight percentage:

[0008] Silicone-acrylic resin emulsion 9-16%;

[0009] Titanium dioxide 2-5%;

[0010] Calcium carbonate 25-30%;

[0011] Sand content: 8-12%;

[0012] Titanium dioxide-calcium carbonate complex 6-9%;

[0013] Titanium dioxide-sand composite material 3-6%;

[0014] 2-4% cellulose or its derivatives;

[0015] Additives 2.5-4%;

[0016] Water balance.

[0017] By adopting the above technical solution, the existing water-based artistic paints have limitations in the amount of pigments, fillers, and sands that tend to agglomerate in water. Insufficient use of pigments, fillers, and sands will affect the aesthetics and texture of the final artistic paint coating. Therefore, it is difficult to balance the durability and appearance of water-based artistic paints.

[0018] The addition of titanium dioxide-calcium carbonate composites and titanium dioxide-abrasive composites to artistic paints not only increases the overall content of titanium dioxide, calcium carbonate, and abrasives, thus improving the appearance and texture of the paint, but also maintains its stability by improving interfacial properties and preventing agglomeration. Furthermore, the stability and durability of the cured paint film system are enhanced. Silicone-acrylic resin emulsions possess good toughness and water resistance, and the silicone-acrylic resin system helps to evenly disperse titanium dioxide and abrasives, thereby improving the durability of the artistic paint.

[0019] Optionally, the cellulose or its derivatives include one or more of cellulose, methylcellulose, carboxymethylcellulose, hydroxyethylcellulose, and hydroxypropylmethylcellulose.

[0020] By adopting the above technical solutions, the cellulose or its derivatives can play a thickening role and improve the suspension stability of sand and pigments and fillers, thereby improving the performance of the paint film.

[0021] Optionally, the additives include one or more of dispersants, defoamers, cosolvents, and film-forming aids.

[0022] By adopting the above technical solutions, dispersants can reduce and prevent flocculation, sedimentation, or stratification between artistic paint components due to electrostatic attraction or steric hindrance, thereby improving stability; defoamers achieve rapid defoaming by breaking up bubbles, reducing defects such as uneven paint film; cosolvents can improve the compatibility of silicone-acrylic resin in artistic paint systems, thereby improving stability; and film-forming aids can regulate the fusion process of latex particles, helping to form a uniform and continuous paint film and improving paint film performance.

[0023] Optionally, the additives include dispersants, defoamers, cosolvents, and film-forming aids, wherein the mass percentages of the dispersants, defoamers, cosolvents, and film-forming aids in the total components are 0.5–0.9%, 0.2–0.6%, 0.8–1.2%, and 0.7–1.2%, respectively.

[0024] Secondly, the preparation method of the water-based artistic paint provided in this application adopts the following technical solution:

[0025] A method for preparing a water-based artistic paint includes the following steps:

[0026] Titanium dioxide, sand, titanium dioxide-sand composite, cellulose or its derivatives, some additives and some water are mixed and stirred evenly. Then calcium carbonate and titanium dioxide-calcium carbonate composite are added and stirred evenly. Then silicone acrylic resin emulsion, remaining additives and remaining water are added and stirred evenly to obtain water-based artistic paint.

[0027] By adopting the above technical solution, the stepwise addition and mixing of each component is controlled, thereby improving the dispersion uniformity of the artistic paint system and thus enhancing the stability of the artistic paint.

[0028] Optionally, the titanium dioxide-calcium carbonate composite is obtained by wet grinding of titanium dioxide and calcium carbonate; the titanium dioxide-sand composite is obtained by wet grinding of titanium dioxide and sand.

[0029] By adopting the above technical solutions, the activation effect of mechanical force promotes the combination of titanium dioxide and calcium carbonate to form titanium dioxide-calcium carbonate complex, and the combination of titanium dioxide and sand to form titanium dioxide-sand complex, thereby exerting the hiding power of titanium dioxide, calcium carbonate and sand and improving the texture, while maintaining the good stability of the artistic paint system.

[0030] Optionally, the mass ratio of titanium dioxide to calcium carbonate is 1:(0.8-1.5); the mass ratio of titanium dioxide to sand is 1:(0.8-1.5).

[0031] By adopting the above technical solutions, due to the good stability after composite formation, the composition ratio of titanium dioxide-calcium carbonate composite and titanium dioxide-sand composite can achieve a wide range of applications.

[0032] Optionally, the preparation method of the titanium dioxide-calcium carbonate composite includes the following steps:

[0033] Calcium carbonate and dihydroxypolydimethylsiloxane were stirred and mixed at 70-80°C, with the mass ratio of calcium carbonate to dihydroxypolydimethylsiloxane being 100:(1-3.5). After stirring, modified calcium carbonate was obtained.

[0034] Titanium dioxide and C2-C6 diol are stirred and mixed at 50-60°C, with a mass ratio of titanium dioxide to C2-C6 diol of 100:(2-5). Modified titanium dioxide is obtained after stirring.

[0035] Modified titanium dioxide and modified calcium carbonate were mixed and then wet-milled. During the milling process, a dialdehyde crosslinking agent was added, accounting for 2-4% of the total mass of the modified titanium dioxide and modified calcium carbonate. The milling temperature was 40-50℃. After milling, the mixture was washed with water and dried to obtain a titanium dioxide-calcium carbonate composite.

[0036] By adopting the above technical solution, dihydroxy polydimethylsiloxane can form hydrogen bonds with the hydroxyl groups on the surface of calcium carbonate, thereby coating and modifying the surface of calcium carbonate. Similarly, C2-C6 diols can form hydrogen bonds with the hydroxyl groups on the surface of titanium dioxide. The resulting modified calcium carbonate is then wet-milled with modified titanium dioxide, and a dialdehyde crosslinking agent is added to form a crosslinked network structure in the composite. This greatly improves the interfacial compatibility between the composite and silicone-acrylic resin, improves the density of the paint film, and thus improves the aging resistance of the paint film while improving storage stability.

[0037] Optionally, the preparation method of the titanium dioxide-abrasive composite includes the following steps:

[0038] Sand, C4-C5 tetraol, and water are stirred and mixed at 70-80°C. The mass ratio of sand, C4-C5 tetraol, and water is 100:(1-3.5):(2-5). After stirring, modified sand is obtained.

[0039] Titanium dioxide and C2-C6 diol are stirred and mixed at 50-60°C, with a mass ratio of titanium dioxide to C2-C6 diol of 100:(2-5). Modified titanium dioxide is obtained after stirring.

[0040] Modified titanium dioxide and modified sand are mixed and then wet-milled. During the milling process, a dialdehyde crosslinking agent is added, accounting for 2-4% of the total mass of the modified titanium dioxide and modified sand. The milling temperature is 40-50℃. After milling, the mixture is washed with water and dried to obtain a titanium dioxide-sand composite.

[0041] By adopting the above technical solution, C4-C5 tetraol is used to coat and modify the surface of the sand. The resulting modified sand is then wet-ground with modified titanium dioxide, and dialdehyde crosslinking agent is added to form a crosslinking network structure in the composite, which greatly improves the interfacial compatibility between the composite and silicone-acrylic resin and improves the density of the paint film.

[0042] To address the different surface properties of calcium carbonate and sand, dihydroxy polydimethylsiloxane and C4-C5 tetraol were used for coating modification, respectively. This allowed the two composites to synergistically improve the dispersibility and uniformity of the filler system, ensuring the basic aesthetic appeal of the artistic paint while improving durability properties such as aging resistance and resistance to damp heat.

[0043] Optionally, C2-C6 diols include one or more of ethylene glycol, propylene glycol, butanediol, pentanediol, and hexanediol.

[0044] Optionally, C4-C5 tetraols include one or both of pentaerythritol and erythritol.

[0045] Optionally, the method for preparing the silicone-acrylic resin emulsion includes the following steps:

[0046] Water and emulsifier are stirred evenly, and octamethylcyclotetrasiloxane and vinyl polysiloxane are added to obtain a polysiloxane emulsion; butyl acrylate, hydroxyethyl acrylate, lauryl acrylate and initiator are mixed to obtain an acrylate monomer emulsion.

[0047] An inert gas is introduced into the polysiloxane emulsion. Under the protection of the inert gas, the polysiloxane emulsion is heated, and then an acrylate monomer emulsion is added dropwise to carry out the reaction. After the reaction is completed, the pH value is adjusted to be close to neutral, and the material is filtered out to obtain a silicone-acrylic resin emulsion.

[0048] By adopting the above technical solution, octamethylcyclotetrasiloxane and vinyl polysiloxane are used as the organosilicon components of silicone-acrylic resin, and hydroxyethyl acrylate and lauryl acrylate are used to modify the structure of silicone-acrylic resin, thereby further improving the interfacial compatibility between the composite and silicone-acrylic resin, and thus improving the overall performance of the coating film.

[0049] Optionally, the mass ratio of butyl acrylate, hydroxyethyl acrylate, lauryl acrylate, octamethylcyclotetrasiloxane and vinyl polysiloxane is 1:(0.7-0.9):(0.05-0.2):(1.5-2):(3-5).

[0050] In summary, this application has the following beneficial effects:

[0051] 1. The addition of titanium dioxide-calcium carbonate composite and titanium dioxide-abrasive composite to the artistic paint of this application not only increases the overall content of titanium dioxide, calcium carbonate, and abrasive to improve the appearance and texture of the artistic paint, but also maintains the stability of the artistic paint by improving the interfacial properties of the titanium dioxide-calcium carbonate composite and titanium dioxide-abrasive composite, thus preventing agglomeration and other problems. Furthermore, the stability of the cured paint film system is also improved, further enhancing its durability. Silicone-acrylic resin emulsion has good toughness and water resistance, and the silicone-acrylic resin system helps to evenly disperse titanium dioxide and abrasive, thereby improving the durability of the artistic paint.

[0052] 2. To address the different surface properties of calcium carbonate and sand, dihydroxy polydimethylsiloxane and C4-C5 tetraol were used for coating modification, and cross-linking was carried out during the grinding process. This enabled the titanium dioxide-calcium carbonate composite and the titanium dioxide-sand composite to synergistically improve the dispersibility and uniformity of the filler system, ensuring the basic aesthetics of the artistic paint while improving durability properties such as aging resistance and resistance to damp heat. Detailed Implementation

[0053] The following provides a further detailed description of this application.

[0054] Preparation Example 1

[0055] A method for preparing a silicone-acrylic resin emulsion includes the following steps:

[0056] Water and emulsifier were stirred evenly to prepare a solution containing 5 wt% emulsifier. Octamethylcyclotetrasiloxane and vinyl polysiloxane were then added and stirred evenly to obtain a polysiloxane emulsion. The emulsifier was sodium dodecylbenzenesulfonate; the vinyl polysiloxane was vinyltriethoxysilane.

[0057] Butyl acrylate, hydroxyethyl acrylate, lauryl acrylate, and an initiator are mixed to obtain an acrylate monomer emulsion. The initiator is ammonium persulfate.

[0058] The mass ratio of butyl acrylate, hydroxyethyl acrylate, lauryl acrylate, octamethylcyclotetrasiloxane, and vinyl polysiloxane is 1:0.7:0.05:1.5:3. The initiator accounts for 3 wt% of the above raw materials.

[0059] Nitrogen gas was introduced into the polysiloxane emulsion. Under nitrogen protection, the polysiloxane emulsion was heated to 75°C, and then acrylate monomer emulsion was added dropwise for 1 hour. After the addition, the temperature was raised to 85°C and kept at that temperature for 1.5 hours. After the reaction was completed, ammonia water was added to adjust the pH of the reaction system to 7. The mixture was then filtered to obtain a silicone-acrylic resin emulsion.

[0060] Preparation Example 2

[0061] A method for preparing a silicone-acrylic resin emulsion includes the following steps:

[0062] Water and emulsifier were stirred evenly to prepare a solution containing 5 wt% emulsifier. Octamethylcyclotetrasiloxane and vinyl polysiloxane were then added and stirred evenly to obtain a polysiloxane emulsion. The emulsifier was sodium dodecylbenzenesulfonate; the vinyl polysiloxane was vinyltriethoxysilane.

[0063] Butyl acrylate, hydroxyethyl acrylate, lauryl acrylate, and an initiator are mixed to obtain an acrylate monomer emulsion. The initiator is ammonium persulfate.

[0064] The mass ratio of butyl acrylate, hydroxyethyl acrylate, lauryl acrylate, octamethylcyclotetrasiloxane, and vinyl polysiloxane is 1:0.9:0.2:2:5. The initiator accounts for 3 wt% of the above raw materials.

[0065] Nitrogen gas was introduced into the polysiloxane emulsion. Under nitrogen protection, the polysiloxane emulsion was heated to 75°C, and then acrylate monomer emulsion was added dropwise for 1 hour. After the addition, the temperature was raised to 85°C and kept at that temperature for 1.5 hours. After the reaction was completed, ammonia water was added to adjust the pH of the reaction system to 7. The mixture was then filtered to obtain a silicone-acrylic resin emulsion.

[0066] Preparation Example 3

[0067] The difference between this preparation example and Preparation Example 2 is that the mass ratio of butyl acrylate, hydroxyethyl acrylate, lauryl acrylate, octamethylcyclotetrasiloxane, and vinyl polysiloxane is 1:0.6:0.5:2:5.

[0068] Example 1

[0069] A method for preparing a water-based artistic paint includes the following steps:

[0070] Titanium dioxide and calcium carbonate were wet-milled to obtain a titanium dioxide-calcium carbonate composite. Specifically, the particle size of the titanium dioxide was 0.05–0.1 μm, the particle size of the calcium carbonate was 0.1–0.3 μm, the mass ratio of titanium dioxide to calcium carbonate was 1:0.8, and a 50 wt% slurry was formed. The slurry was then ground in a horizontal mill for 15 min and dried to obtain the titanium dioxide-calcium carbonate composite.

[0071] Titanium dioxide and sand were wet-milled to obtain a titanium dioxide-sand composite. Specifically, the particle size of the titanium dioxide was 0.05–0.1 μm, the particle size of the sand was 0.4–0.6 μm, the mass ratio of titanium dioxide to sand was 1:0.8, and a 50 wt% slurry was formed. The slurry was then ground in a horizontal mill for 15 min and dried to obtain the titanium dioxide-sand composite.

[0072] Weigh the raw materials according to the following weight percentages:

[0073] The composition comprises 9% silicone-acrylic resin emulsion, 2% titanium dioxide, 25% calcium carbonate, 8% sand, 6% titanium dioxide-calcium carbonate composite, 3% titanium dioxide-sand composite, 2% cellulose, 2.5% additives, and water as the balance. The silicone-acrylic resin emulsion was prepared according to Preparation Example 1, and the sand is quartz sand. The additives include dispersant, defoamer, cosolvent, and film-forming aid. Specifically, the dispersant is dispersant 5040, the defoamer is BASF defoamer 2410, the cosolvent is ethylene glycol, and the film-forming aid is dodecyl alcohol ester. The mass percentages of the dispersant, defoamer, cosolvent, and film-forming aid in the total composition are 0.5%, 0.2%, 0.8%, and 0.5%, respectively.

[0074] Titanium dioxide, sand, titanium dioxide-sand composite, cellulose, dispersant, defoamer, and 70 wt% water are mixed and stirred at 600 rpm until homogeneous. Then, calcium carbonate and titanium dioxide-calcium carbonate composite are added and stirred at 1200 rpm until homogeneous. Finally, silicone acrylic resin emulsion, co-solvent, film-forming aid, and remaining water are added and stirred at 800 rpm until homogeneous to obtain water-based artistic paint.

[0075] Example 2

[0076] A method for preparing a water-based artistic paint includes the following steps:

[0077] Titanium dioxide and calcium carbonate were wet-milled to obtain a titanium dioxide-calcium carbonate composite. Specifically, the particle size of titanium dioxide was 0.05–0.1 μm, the particle size of calcium carbonate was 0.1–0.3 μm, the mass ratio of titanium dioxide to calcium carbonate was 1:1.5, and a 50 wt% slurry was formed. The slurry was then ground in a horizontal mill for 15 min and dried to obtain the titanium dioxide-calcium carbonate composite.

[0078] Titanium dioxide and sand were wet-milled to obtain a titanium dioxide-sand composite. Specifically, the particle size of the titanium dioxide was 0.05–0.1 μm, the particle size of the sand was 0.4–0.6 μm, the mass ratio of titanium dioxide to sand was 1:1.5, and a 50 wt% slurry was formed. The slurry was then ground in a horizontal mill for 15 min and dried to obtain the titanium dioxide-sand composite.

[0079] Weigh the raw materials according to the following weight percentages:

[0080] The composition comprises 16% silicone-acrylic resin emulsion, 5% titanium dioxide, 30% calcium carbonate, 12% abrasive, 9% titanium dioxide-calcium carbonate composite, 6% titanium dioxide-abrasive composite, 4% methylcellulose, 4% additives, and water as the balance. The silicone-acrylic resin emulsion was prepared according to Preparation Example 2. The additives include dispersant, defoamer, cosolvent, and film-forming aid. Specifically, the dispersant is dispersant 5040, the defoamer is BASF defoamer 2410, the cosolvent is ethylene glycol, and the film-forming aid is dodecyl alcohol ester. The mass percentages of the dispersant, defoamer, cosolvent, and film-forming aid in the total components are 0.9%, 0.6%, 1.2%, and 1.3%, respectively.

[0081] Titanium dioxide, sand, titanium dioxide-sand composite, methylcellulose, dispersant, defoamer, and 70wt% water are mixed and stirred at 600rpm until homogeneous. Then, calcium carbonate and titanium dioxide-calcium carbonate composite are added and stirred at 1200rpm until homogeneous. Finally, silicone-acrylic resin emulsion, co-solvent, film-forming aid, and remaining water are added and stirred at 800rpm until homogeneous to obtain water-based artistic paint.

[0082] Example 3

[0083] The difference between this embodiment and Embodiment 2 is that the proportions of the raw materials for the water-based artistic paint are different.

[0084] Specifically, the raw materials for water-based artistic paint are weighed according to the following weight percentages:

[0085] The composition comprises 12% silicone-acrylic resin emulsion, 4% titanium dioxide, 28% calcium carbonate, 10% sand, 8% titanium dioxide-calcium carbonate composite, 5% titanium dioxide-sand composite, 2% cellulose, 3.5% additives, and water as the balance. The silicone-acrylic resin emulsion was prepared according to Preparation Example 1. The additives include dispersant, defoamer, cosolvent, and film-forming aid. Specifically, the dispersant is dispersant 5040, the defoamer is BASF defoamer 2410, the cosolvent is ethylene glycol, and the film-forming aid is dodecyl alcohol ester. The mass percentages of the dispersant, defoamer, cosolvent, and film-forming aid in the total components are 0.8%, 0.4%, 1.1%, and 1.2%, respectively.

[0086] Example 4

[0087] The difference between this embodiment and Embodiment 2 is that the preparation method of the titanium dioxide-calcium carbonate composite is different.

[0088] Calcium carbonate and dihydroxypolydimethylsiloxane were stirred and mixed at 70°C for 15 minutes to obtain modified calcium carbonate. The mass ratio of calcium carbonate to dihydroxypolydimethylsiloxane was 100:1, and the hydroxyl content of dihydroxypolydimethylsiloxane was 2.5%.

[0089] Titanium dioxide and propylene glycol were stirred and mixed at 50°C for 15 minutes. The mass ratio of titanium dioxide to propylene glycol was 100:2. Modified titanium dioxide was obtained after stirring.

[0090] Modified titanium dioxide and modified calcium carbonate were mixed and then wet-milled. The mass ratio of modified titanium dioxide to modified calcium carbonate was 1:1.5. The mixture was mixed to form a 50wt% slurry and then put into a horizontal mill for 15 minutes. Glyoxal was added during the milling process, accounting for 2% of the total mass of modified titanium dioxide and modified calcium carbonate. The milling temperature was 40℃. After milling, the mixture was dried to obtain a titanium dioxide-calcium carbonate composite.

[0091] Example 5

[0092] The difference between this embodiment and Embodiment 2 is that the preparation method of the titanium dioxide-sand composite is different.

[0093] The sand, pentaerythritol, and water were stirred and mixed at 70°C for 15 minutes. The mass ratio of sand, pentaerythritol, and water was 100:1:2. After stirring, the modified sand was obtained.

[0094] Titanium dioxide and propylene glycol were stirred and mixed at 50°C for 15 minutes. The mass ratio of titanium dioxide to propylene glycol was 100:2. Modified titanium dioxide was obtained after stirring.

[0095] Modified titanium dioxide and modified sand were mixed and then wet-milled. The mass ratio of modified titanium dioxide to modified sand was 1:1.5. The mixture was mixed to form a 50wt% slurry and then put into a horizontal mill for 15 minutes. Glyoxal was added during the milling process. Glyoxal accounted for 2% of the total mass of modified titanium dioxide and modified sand. The milling temperature was 40℃. After milling, the mixture was dried to obtain a titanium dioxide-sand composite.

[0096] Example 6

[0097] The difference between this embodiment and Embodiment 2 is that the preparation methods of the titanium dioxide-calcium carbonate composite and the titanium dioxide-sand composite are different.

[0098] The preparation method of the titanium dioxide-calcium carbonate composite is the same as in Example 4; the preparation method of the titanium dioxide-sand composite is the same as in Example 5.

[0099] Example 7

[0100] The difference between this embodiment and Embodiment 2 is that the preparation methods of the titanium dioxide-calcium carbonate composite and the titanium dioxide-sand composite are different.

[0101] Titanium dioxide-calcium carbonate complex:

[0102] Calcium carbonate and dihydroxypolydimethylsiloxane were stirred and mixed at 80°C for 15 minutes to obtain modified calcium carbonate. The mass ratio of calcium carbonate to dihydroxypolydimethylsiloxane was 100:3.5, and the hydroxyl content of dihydroxypolydimethylsiloxane was 2.5%.

[0103] Titanium dioxide and propylene glycol were stirred and mixed at 60°C for 15 minutes. The mass ratio of titanium dioxide to propylene glycol was 100:5. Modified titanium dioxide was obtained after stirring.

[0104] Modified titanium dioxide and modified calcium carbonate were mixed and then wet-milled. The mass ratio of modified titanium dioxide to modified calcium carbonate was 1:1.5. The mixture was mixed to form a 50wt% slurry and then put into a horizontal mill for 15 minutes. Glyoxal was added during the milling process, accounting for 4% of the total mass of modified titanium dioxide and modified calcium carbonate. The milling temperature was 50℃. After milling, the mixture was dried to obtain a titanium dioxide-calcium carbonate composite.

[0105] Titanium dioxide-abrasive composite:

[0106] The sand, pentaerythritol, and water were stirred and mixed at 80°C for 15 minutes. The mass ratio of sand, pentaerythritol, and water was 100:3.5:5. After stirring, the modified sand was obtained.

[0107] Titanium dioxide and propylene glycol were stirred and mixed at 60°C for 15 minutes. The mass ratio of titanium dioxide to propylene glycol was 100:5. Modified titanium dioxide was obtained after stirring.

[0108] Modified titanium dioxide and modified sand were mixed and then wet-milled. The mass ratio of modified titanium dioxide to modified sand was 1:1.5. The mixture was mixed to form a 50wt% slurry and then put into a horizontal mill for 15 minutes. Glyoxal was added during the milling process. Glyoxal accounted for 4% of the total mass of modified titanium dioxide and modified sand. The milling temperature was 50℃. After milling, the mixture was dried to obtain a titanium dioxide-sand composite.

[0109] Example 8

[0110] The difference between this embodiment and Embodiment 7 is that, in the preparation steps of the titanium dioxide-calcium carbonate composite, glyoxal is not added during the grinding of modified titanium dioxide and modified calcium carbonate. Similarly, in the preparation steps of the titanium dioxide-sand composite, glyoxal is not added during the grinding of modified titanium dioxide and modified sand.

[0111] Example 9

[0112] The difference between this embodiment and Embodiment 7 is that the preparation steps for the modified calcium carbonate and the modified sand are different.

[0113] In the preparation steps of modified calcium carbonate, calcium carbonate, pentaerythritol, and water are stirred and mixed at 80°C for 15 minutes. The mass ratio of calcium carbonate, pentaerythritol, and water is 100:3.5:5. After stirring, modified calcium carbonate is obtained.

[0114] In the preparation step of the modified sand, the sand and dihydroxy polydimethylsiloxane are stirred and mixed at 80°C for 15 minutes. After stirring, the modified sand is obtained. The mass ratio of sand to dihydroxy polydimethylsiloxane is 100:3.5, and the hydroxyl content of dihydroxy polydimethylsiloxane is 2.5%.

[0115] Example 10

[0116] The difference between this embodiment and Embodiment 7 is that the preparation steps of the modified titanium dioxide are different.

[0117] In the preparation steps of modified titanium dioxide, titanium dioxide, pentaerythritol and water are stirred and mixed at 60°C. The mass ratio of titanium dioxide, pentaerythritol and water is 100:5:7.5. After stirring, modified titanium dioxide is obtained.

[0118] Example 11

[0119] The difference between this embodiment and Example 7 is that the silicone-acrylic resin emulsion was prepared in Example 3.

[0120] Comparative Example 1

[0121] The difference between this comparative example and Example 2 is that the water-based artistic paint is weighed according to the following weight percentages:

[0122] The composition is as follows: 16% silicone-acrylic resin emulsion, 11% titanium dioxide, 35.4% calcium carbonate, 15.6% sand, 4% methylcellulose, 4% additives, and water as the balance.

[0123] Comparative Example 2

[0124] The difference between this comparative example and Example 2 is that the water-based artistic paint is weighed according to the following weight percentages:

[0125] The composition is as follows: 16% silicone-acrylic resin emulsion, 8.6% titanium dioxide, 35.4% calcium carbonate, 12% sand, 6% titanium dioxide-sand composite, 4% methylcellulose, 4% additives, and water as the balance.

[0126] Comparative Example 3

[0127] The difference between this comparative example and Example 2 is that the water-based artistic paint is weighed according to the following weight percentages:

[0128] The composition is as follows: 16% silicone-acrylic resin emulsion, 7.4% titanium dioxide, 30% calcium carbonate, 15.6% sand, 6% titanium dioxide-calcium carbonate composite, 4% methylcellulose, 4% additives, and water as the balance.

[0129] Performance testing

[0130] Storage stability: Take 500g of water-based artistic paint, fill it into a sealed container, and place it in an environment of 55±2℃ for 10 days. Then transfer it to a room temperature environment and check the appearance of the water-based artistic paint.

[0131] Water-based artistic paint was applied to a cement slab and allowed to dry for 7 days to obtain a test panel, which was then subjected to the following tests:

[0132] Washability: Place the test panel into the washability tester for washing test. Stop the test when the test panel shows signs of paint peeling or cracking, and record the number of washes. If there are no signs of paint peeling or cracking after more than 10,000 washes, stop the test as well.

[0133] Aging resistance: The test panel was placed under a xenon lamp for aging, with an irradiance of 550 W / m². 2, The temperature was 30℃, the humidity was 45%RH, and the aging time was 120h. After aging, the test was carried out according to the aforementioned washing test method. The number of times the test board showed paint peeling and cracking was recorded. The more times it was washed, the stronger the aging resistance.

[0134] Moisture and heat resistance: The test panel was placed in a constant temperature and humidity test chamber for moisture and heat treatment at 55°C and 90% RH for 120 hours. After treatment, the test was conducted according to the aforementioned washing test method. The number of times the test panel was washed when paint peeling or cracking occurred was recorded. The more times it was washed, the stronger the moisture and heat resistance.

[0135] The test results are shown in Table 1.

[0136] Table 1

[0137]

[0138] In conjunction with Examples 1-3, 44% to 62% of pigments, fillers, and abrasives can be added to water-based artistic paints, which has a wide range of applications. Moreover, it can be seen from the actual application of water-based artistic paints that when the amount of pigments, fillers, and abrasives is relatively larger, the beauty and texture of the paint film are better.

[0139] While satisfying aesthetic and textural requirements, water-based artistic paints maintain good storage stability. The water-based artistic paints in Examples 1-3 remained uniform, free of agglomeration and lumps even after storage in a thermal environment. Compared to the results of Comparative Examples 1-3, it is evident that the addition of titanium dioxide-calcium carbonate composite and titanium dioxide-abrasive composite not only increases the overall content of titanium dioxide, calcium carbonate, and abrasive to improve the appearance and texture of the artistic paint, but also improves its storage stability, achieving a balance between appearance and stability.

[0140] Secondly, the durability of water-based artistic paint is also improved after adding titanium dioxide-calcium carbonate composite and titanium dioxide-abrasive composite, and the number of washes in Examples 1-3 is significantly increased.

[0141] When titanium dioxide-calcium carbonate composite and titanium dioxide-sand composite are surface modified and cross-linked during grinding, as shown in Examples 2 and 4-7, the aging resistance and damp heat resistance of the water-based artistic paint film are greatly improved, that is, the durability of the water-based artistic paint is improved.

[0142] Furthermore, in conjunction with Examples 7 and 8-10, it can be seen that the surface treatment selection of titanium dioxide-calcium carbonate composite and titanium dioxide-abrasive composite has a significant impact on the final paint film effect. The best results are achieved by treating calcium carbonate with dihydroxypolydimethylsiloxane, treating abrasive with C4-C5 tetraol, and treating titanium dioxide with C2-C6 diol.

[0143] In addition, the main body of the water-based art paint is made of silicone-acrylic resin emulsion. As can be seen from Examples 7 and 11, the ratio of hydroxyethyl acrylate and lauryl acrylate in the silicone-acrylic resin emulsion also affects the final paint film effect.

[0144] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this specific embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A water-based artistic paint, characterized in that: It consists of the following components by weight percentage: Silicone-acrylic resin emulsion 9~16%; Titanium dioxide 2~5%; Calcium carbonate 25-30%; Sand content 8~12%; Titanium dioxide-calcium carbonate complex 6~9%; Titanium dioxide-abrasive composite 3~6%; 2-4% cellulose or its derivatives; Additives 2.5-4%; Water balance; The cellulose or its derivatives are one or more selected from cellulose, methylcellulose, carboxymethylcellulose, hydroxyethylcellulose, and hydroxypropylmethylcellulose; The preparation method of the titanium dioxide-calcium carbonate composite includes the following steps: Calcium carbonate and dihydroxypolydimethylsiloxane are stirred and mixed at 70~80℃, wherein the mass ratio of calcium carbonate to dihydroxypolydimethylsiloxane is 100:(1~3.5). After stirring, modified calcium carbonate is obtained. Titanium dioxide and C2-C6 diol are stirred and mixed at 50~60℃, and the mass ratio of titanium dioxide to C2-C6 diol is 100:(2~5). After stirring, modified titanium dioxide is obtained. Modified titanium dioxide and modified calcium carbonate were mixed and then wet-milled. During the milling process, a dialdehyde crosslinking agent was added, accounting for 2-4% of the total mass of modified titanium dioxide and modified calcium carbonate. The milling temperature was 40-50℃. After milling, the mixture was washed with water and dried to obtain a titanium dioxide-calcium carbonate composite. The preparation method of the titanium dioxide-sand composite includes the following steps: Sand, C4-C5 tetraol, and water are stirred and mixed at 70-80°C. The mass ratio of sand, C4-C5 tetraol, and water is 100:(1-3.5):(2-5). After stirring, modified sand is obtained. Titanium dioxide and C2-C6 diol are stirred and mixed at 50~60℃, and the mass ratio of titanium dioxide to C2-C6 diol is 100:(2~5). After stirring, modified titanium dioxide is obtained. Modified titanium dioxide and modified sand are mixed and then wet-milled. During the milling process, a dialdehyde crosslinking agent is added, accounting for 2-4% of the total mass of the modified titanium dioxide and modified sand. The milling temperature is 40-50℃. After milling, the mixture is washed with water and dried to obtain a titanium dioxide-sand composite.

2. The water-based artistic paint according to claim 1, characterized in that: The additives include one or more of dispersants, defoamers, cosolvents, and film-forming aids.

3. A method for preparing a water-based artistic paint according to any one of claims 1-2, characterized in that: Includes the following steps: Titanium dioxide, sand, titanium dioxide-sand composite, cellulose or its derivatives, some additives and some water are mixed and stirred evenly. Then calcium carbonate and titanium dioxide-calcium carbonate composite are added and stirred evenly. Then silicone acrylic resin emulsion, remaining additives and remaining water are added and stirred evenly to obtain water-based artistic paint.

4. The method for preparing a water-based artistic paint according to claim 3, characterized in that: The method for preparing the silicone-acrylic resin emulsion includes the following steps: Mix water and emulsifier evenly, then add octamethylcyclotetrasiloxane and vinyl polysiloxane to obtain a polysiloxane emulsion; Butyl acrylate, hydroxyethyl acrylate, lauryl acrylate, and an initiator are mixed to obtain an acrylate monomer emulsion; An inert gas is introduced into the polysiloxane emulsion. Under the protection of the inert gas, the polysiloxane emulsion is heated, and then an acrylate monomer emulsion is added dropwise to carry out the reaction. After the reaction is completed, the pH value is adjusted to be close to neutral, and the material is filtered out to obtain a silicone-acrylic resin emulsion.

5. The method for preparing a water-based artistic paint according to claim 4, characterized in that: The mass ratio of butyl acrylate, hydroxyethyl acrylate, lauryl acrylate, octamethylcyclotetrasiloxane and vinyl polysiloxane is 1:(0.7~0.9):(0.05~0.2):(1.5~2):(3~5).

Images