A protective adhesive aqueous solution, a water-in-water paint with color dots, and a method for preparing the same.

Abstract

This application relates to the technical field of coatings, specifically disclosing a protective colloid aqueous solution, a water-in-water speckle coating, and a method for preparing the same. The protective colloid aqueous solution disclosed in this application specifically comprises the following components by weight: 10-20 parts protective colloid, 6-11 parts bentonite, and 90-100 parts water; the protective colloid is composed of BYK S482 adhesive and Laponite RDS adhesive in a weight ratio of 8-12:3-5. This application also discloses a water-in-water speckle coating containing the above-mentioned protective colloid aqueous solution and a method for preparing the same. Using the technical solution disclosed in this application, a water-in-water coating with high speckle strength and low shrinkage can be obtained, and it is insensitive to temperature and time changes, allowing for long-term storage and exhibiting good stability.

Description

Technical Field

[0001] This application relates to the technical field of coatings, specifically to a protective adhesive aqueous solution, a water-in-water coating with color dots, and a method for preparing the same. Background Technology

[0002] Currently, some water-based paints on the market have a shrinkage problem in their color dots after long-term storage. Color dot shrinkage means that the color dots harden and become smaller, making them difficult to open during spraying, and causing wrinkles and bulging on the surface after drying.

[0003] Water-based watercolor dot shrinkage is generally divided into finished dot shrinkage and base paint dot shrinkage. Within the same time period, base paint dots shrink more severely than finished dots. Base paint dots are more prone to shrinkage in summer and winter, and prolonged soaking time also affects dot shrinkage. Therefore, a water-based product that does not shrink dots is needed. Summary of the Invention

[0004] To reduce the shrinkage of water-based watercolor dots, this application provides a protective adhesive solution, a water-based watercolor dot coating, and a method for preparing the same.

[0005] In a first aspect, this application provides a protective adhesive aqueous solution, specifically comprising the following components in parts by weight: 10-20 parts of protective adhesive, 6-11 parts of bentonite, and 90-100 parts of water; the protective adhesive is composed of BYK S482 adhesive and Laponite RDS adhesive in a weight ratio of 8-12:3-5.

[0006] This application utilizes the aforementioned weight ratio of BYK S482 adhesive and Laponite RDS adhesive to form a protective colloid, and uses bentonite as a raw material component of the protective colloid aqueous solution. By screening the amounts of the raw material components, a protective colloid aqueous solution is prepared. This protective colloid aqueous solution is then used to prepare a water-in-water paint with colored dots, resulting in a paint with high colored dot strength and extremely low shrinkage.

[0007] In addition, by utilizing the technical solution disclosed in this application, a water-in-water coating with no shrinkage of colored dots can be obtained. It is not sensitive to changes in temperature and time, can be stored for a long time, and has good stability.

[0008] BYK S482 adhesive is a synthetic sheet silicate S482 multicolor protective adhesive that hydrates and swells in water to form a colloid. Under conditions with a small amount of electrolyte, it can rapidly form a highly thixotropic gel. LAPONITE RDS synthetic sheet silicate protective adhesive is insoluble in water but hydrates and swells to form a colorless and transparent colloid, exhibiting excellent thixotropy and yield value even at low concentrations. Bentonite, as a mineral, swells upon contact with water, increasing the interlayer spacing and allowing water molecules to enter the mineral's crystal layers. Furthermore, bentonite minerals possess cation exchange properties, and their structure is a porous, ordered structure. The applicant of this application discovered that by compounding these two adhesives with bentonite to prepare a protective adhesive aqueous solution, and adjusting the viscosity to a suitable level, shrinkage of color spots in the coating is reduced; a coating with high color spot strength, low shrinkage rate, and high stability is obtained.

[0009] Preferably, the protective adhesive aqueous solution specifically comprises the following components in parts by weight: 10-16 parts of protective adhesive, 9-11 parts of bentonite, and 90-100 parts of water.

[0010] Preferably, the protective adhesive is composed of BYK S482 adhesive and Laponite RDS adhesive in a weight ratio of 10-12:3-4.

[0011] In one specific implementation, the weight ratio of the BYK S482 adhesive to the Laponite RDS adhesive can be 8:3, 8:4, 8:5, 10:3, 10:4, 10:5, 12:3, 12:4, or 12:5.

[0012] In some specific implementations, the weight ratio of the BYK S482 adhesive to the Laponite RDS adhesive can also be (8-10):3, (8-10):4, (8-10):5, (10-12):3, (10-12):4, (10-12):5, 12:(3-4), 12:(4-5), or 12:(3-5).

[0013] Experimental analysis shows that by controlling the weight ratio of BYK S482 adhesive and Laponite RDS adhesive within the above-mentioned range, this application can further improve the strength of the dots in the water-based paint and further reduce the shrinkage rate of the dots.

[0014] Preferably, the bentonite has a particle size of 500-800 mesh.

[0015] In one specific implementation, the bentonite can have a particle size of 500 mesh, 650 mesh, or 800 mesh.

[0016] In some specific implementation schemes, the particle size of the bentonite can also be 500-650 mesh or 650-800 mesh.

[0017] Secondly, this application provides a method for preparing the above-mentioned protective adhesive aqueous solution, comprising the following steps: adding the protective adhesive and the bentonite sequentially to water at a rotation speed of 800-1000 r / min, and stirring and dispersing for 5-10 min; then adjusting the rotation speed to 1400-1600 r / min and stirring for 50-70 min to obtain the solution.

[0018] In the preparation method of the protective adhesive aqueous solution, the materials need to be added under rapid stirring, and then stirred for several minutes to make the raw materials evenly dispersed and play a better role, so as to increase the viscosity rapidly. At this time, the stirring speed is adjusted to allow the dispersion to mature fully for a period of time. During this stage, the viscosity of the protective adhesive aqueous solution increases even more.

[0019] Thirdly, this application provides a water-based paint with colored dots, which is formulated from a base paint, a continuous phase and a granulating liquid in a mass ratio of (3-5):(1-2):(3-4);

[0020] The base paint specifically comprises the following components in parts by weight: 0.1-0.5 parts dispersant, 0.1-0.5 parts defoamer, 1.0-2.0 parts antifreeze, 1.0-2.0 parts film-forming aid, 0.2-0.3 parts wetting agent, 1-6 parts kaolin, 0.9-2.3 parts cellulose ether, 1.0-2.0 parts pH adjuster, 15-25 parts emulsion, 0.1-0.5 parts preservative, 0.1-0.5 parts thickener, 5-10 parts aqueous solution of the above protective colloid, and 50-70 parts water;

[0021] The continuous phase comprises the following components in parts by weight: 0.1-0.3 parts of defoamer, 0.1-0.5 parts of suspending agent, 50-70 parts of emulsion, 1-10 parts of antifreeze, 1-10 parts of film-forming aid, 0.1-0.5 parts of bactericide, 0.1-0.3 parts of pH adjuster, 0.1-0.5 parts of thickener, and 20-50 parts of water;

[0022] The granulation solution comprises the following components in parts by weight: 1-10 parts of the above-mentioned protective colloid aqueous solution, 0.1-1 parts of bentonite, 0.1-0.5 parts of bactericide, and 85-95 parts of deionized water.

[0023] Preferably, the cellulose ether is composed of EHM 500 cellulose ether and HHBR250 cellulose ether in a weight ratio of 0.1-0.3:0.8-2.0.

[0024] In one specific implementation, the weight ratio of EHM 500 cellulose ether to HHBR 250 cellulose ether can be 0.1:0.8, 0.1:1.6, 0.1:2.0, 0.2:0.8, 0.2:1.6, 0.2:2.0, 0.3:0.8, 0.3:1.6, or 0.3:2.0.

[0025] In some specific implementations, the weight ratio of EHM 500 cellulose ether to HHBR 250 cellulose ether may also be (0.1-0.2):0.8, (0.1-0.2):1.6, (0.1-0.2):2.0, (0.2-0.3):0.8, (0.2-0.3):1.6, (0.2-0.3):2.0, 0.3:(0.8-1.6), or 0.3:(0.8-2.0).

[0026] Cellulose in coatings is prone to shrinkage, which can easily lead to shrinkage of colored dots in the coating. This application improves the shrinkage of colored dots by adding the two cellulose ethers mentioned above to interact with each other and by adjusting the ratio of their dosages.

[0027] Experimental analysis shows that using EHM 500 cellulose ether and HHBR 250 cellulose ether in the above weight ratio as raw material components of the coating can further improve the strength of the dots in the water-in-water paint and further reduce the shrinkage rate of the dots.

[0028] Preferably, the emulsion is selected from any one of Showa 4765 emulsion, Badaf 8399 emulsion, and Badaf 8300 emulsion.

[0029] Furthermore, the emulsion is composed of Showa 4765 emulsion and Badfu 8399 emulsion in a weight ratio of 20-25:3-7.

[0030] In one specific implementation, the weight ratio of Showa 4765 emulsion to Badifu 8399 emulsion can be 20:3, 20:5, 20:7, 23:3, 23:5, 23:7, 25:3, 25:5, or 25:7.

[0031] In some specific implementations, the weight ratio of Showa 4765 emulsion and Badifu 8399 emulsion can also be (20-23):3, (20-23):5, (20-23):7, (23-25):3, (23-25):5, (23-25):7, 25:(3-5), 25:(3-7), 25:(5-7).

[0032] The synthetic emulsion introduces special functional groups into its molecular chain segments, allowing for initial and subsequent full reaction with the protective colloid and cellulose, while maintaining stability later. This results in strong cohesion in the base paint of the prepared water-in-water speckle coating, exhibiting a granulation effect and protecting the speckles from breakage. The formulated multi-color coating system demonstrates strong storage stability and is less prone to thickening. Furthermore, this application selects an emulsion with a weaker reaction to the protective colloid to prepare the water-in-water speckle coating, which can further improve the shrinkage of the speckles.

[0033] Experimental analysis shows that using Showa 4765 emulsion and Badifu 8399 emulsion in the above weight ratio as raw material components of the coating can further improve the strength of the dots in the water-in-water paint and further reduce the shrinkage rate of the dots.

[0034] Fourthly, this application provides a method for preparing the above-mentioned water-in-water colored paint, comprising the following steps:

[0035] At a rotation speed of 800-1000 rpm, dispersant, defoamer, antifreeze, film-forming aid, wetting agent, kaolin, and cellulose ether are added sequentially to the water. The mixture is stirred and dispersed for 4-6 minutes. A pH adjuster is then added. The rotation speed is adjusted to 1400-1600 rpm, and the mixture is stirred for 17-28 minutes. Then, emulsion, preservative, protective colloid aqueous solution, and thickener are added. The mixture is stirred and dispersed for 4-6 minutes, and the rotation speed is adjusted to 800-1000 rpm, and the mixture is stirred and dispersed for another 4-6 minutes to obtain the final product.

[0036] In summary, the technical solution of this application has the following effects:

[0037] The protective adhesive aqueous solution provided in this application serves as a raw material for preparing water-in-water paint with colored dots. It provides a suitable viscosity, protects the colored dots in the paint from shrinkage, and can improve the strength of the colored dots. By screening the type and amount of protective adhesive, this application can further improve the performance of the paint.

[0038] The water-based paint for colored dots provided in this application utilizes the interaction of protective colloids, cellulose ethers, and emulsions to prevent the colored dots from gelling, thereby effectively reducing the shrinkage of the colored dots.

[0039] The water-in-water paint with colored dots provided in this application can be stored for a long time without shrinking. After long-term storage under normal temperature, hot storage, and cold storage conditions, the shrinkage rate of the colored dots is also extremely low, which makes the water-in-water paint with colored dots prepared in this application have good storage stability. Detailed Implementation

[0040] The present application will be further described in detail below with reference to embodiments, comparative examples and performance test results. These embodiments should not be construed as limiting the scope of protection claimed in this application.

[0041] Preparation Example

[0042] Preparation Examples 1-4

[0043] Preparation Examples 1-4 each provide a water-based paint with colored dots.

[0044] The difference in the above preparation examples is that the amounts of each component in the protective adhesive aqueous solution are different, as shown in Table 1.

[0045] The specific method for preparing the protective adhesive aqueous solution in the above preparation example is as follows:

[0046] At a rotation speed of 900 r / min, protective colloid (composed of BYK S482 colloid and Laponite RDS colloid in a weight ratio of 10:4) and bentonite (calcium-based bentonite with a particle size of 600-700 mesh, purchased from Hebei Shenzichen Environmental Protection Technology Co., Ltd.) were added to water in sequence and stirred for 8 min. Then the rotation speed was adjusted to 1500 r / min and stirred for 60 min to obtain the protective colloid aqueous solution.

[0047] Table 1 shows the dosage of each component in the protective colloid aqueous solution in Preparation Examples 1-4.

[0048]

[0049]

[0050] Preparation Examples 5-9

[0051] Preparation Examples 5-9 provide a water-based paint with colored dots.

[0052] The difference between the above preparation examples lies in the type of protective colloid in the protective colloid aqueous solution, as detailed below.

[0053] In Preparation Example 5: The protective adhesive was BYK S482 adhesive.

[0054] In Preparation Example 6: The protective colloid consisted of BYK S482 adhesive and Laponite RD adhesive in a weight ratio of 10:4.

[0055] In Preparation Example 7: The protective colloid consisted of BYK S482 adhesive and Laponite RDS adhesive in a weight ratio of 13:2.

[0056] In Preparation Example 8: The protective colloid consisted of BYK S482 adhesive and Laponite RDS adhesive in a weight ratio of 8:5.

[0057] In Preparation Example 9: The protective colloid consisted of BYK S482 adhesive and Laponite RDS adhesive in a weight ratio of 12:3.

[0058] Preparation Example 10

[0059] Preparation Example 10 provides a water-based paint with colored dots.

[0060] The specific method for preparing the protective adhesive aqueous solution in the preparation example is as follows:

[0061] Under the condition of 900 r / min, 22 g of protective colloid (composed of BYKS482 glue and Laponite RDS glue in a weight ratio of 10:4) was added to 65 g of water and stirred for 8 min; then the speed was adjusted to 1500 r / min and stirred for 60 min to obtain the protective colloid aqueous solution.

[0062] Preparation Example 11

[0063] Preparation Example 11 provides a water-in-water coating with colored dots.

[0064] The specific method for preparing the protective adhesive aqueous solution in this preparation example is as follows:

[0065] At a rotation speed of 900 r / min, protective colloid (composed of BYK S482 adhesive and Laponite RDS adhesive in a weight ratio of 10:4) and diatomaceous earth were added to water in sequence and stirred for 8 min. Then the rotation speed was adjusted to 1500 r / min and stirred for 60 min to obtain the protective colloid aqueous solution.

[0066] Example

[0067] Examples 1-3

[0068] Examples 1-3 each provide a water-based paint with colored dots.

[0069] The difference in the above embodiments is that the amount of each component in the base paint is different, as shown in Table 2.

[0070] The protective adhesive aqueous solution in the above embodiments was derived from Preparation Example 1.

[0071] The specific preparation method of the water-in-water paint with colored dots in the above embodiments is as follows:

[0072] Preparation of the base paint: At a rotation speed of 900 rpm, dispersant, defoamer, antifreeze, film-forming aid, wetting agent, kaolin, and cellulose ether (composed of EHM 500 cellulose ether and HHBR250 cellulose ether in a weight ratio of 0.1:2.0) were added sequentially to water. The mixture was stirred and dispersed for 5 minutes, then a pH adjuster was added. The rotation speed was adjusted to 1500 rpm, and the mixture was stirred for 20 minutes. Then, an emulsion (composed of Showa 4765 emulsion and Badifu 8399 emulsion in a weight ratio of 23:5), preservative, protective colloid aqueous solution, and thickener were added. The mixture was stirred and dispersed for 5 minutes, and the rotation speed was adjusted to 900 rpm, and the mixture was stirred and dispersed for another 5 minutes to obtain the base paint. Preparation of the continuous phase: At a rotation speed of 900 rpm, 0.2 g of [unspecified substance] was added sequentially to 35 g of water. Defoamer 154 and 0.3g suspending agent 4700 (purchased from Shanghai Grid) were added; the mixture was stirred and dispersed for 5 minutes, the speed was adjusted to 1500 r / min, and stirred for 60 minutes. Then, 60g of emulsion (composed of Showa 4765 emulsion and Badifu 8399 emulsion in a weight ratio of 23:5), 5g of antifreeze propylene glycol, 6g of film-forming aid Texanol, 0.2g of bactericide (purchased from Changzhou Runyang Chemical Co., Ltd.), 0.2g of pH adjuster AMP-95, and 0.3g of thickener TT-615 were added and stirred and dispersed for 5 minutes to obtain the continuous phase.

[0073] Preparation of granulation solution: Under a rotation speed of 900 r / min, add 5 g of protective colloid aqueous solution, 0.5 g of bentonite (600-700 mesh calcium-based bentonite, purchased from Hebei Shenzichen Environmental Protection Technology Co., Ltd.), and 0.3 g of bactericide (purchased from Changzhou Runyang Chemical Co., Ltd.) to 90 g of water in sequence, stir and disperse for 5 min, adjust the rotation speed to 1500 r / min, and stir for 60 min to obtain the granulation solution;

[0074] Add 40g of base paint to 35g of granulation liquid and mix to obtain base coating; add the base coating to 15g of continuous phase and mix to obtain water-in-water paint with colored dots.

[0075] Table 2 shows the dosage of each component in the base paint in Examples 1-3 and Comparative Example 1.

[0076]

[0077] Examples 4-7

[0078] Examples 4-7 each provide a water-based paint with colored dots.

[0079] The difference between the above embodiments and Embodiment 1 is that the source of the protective adhesive aqueous solution is different, and they are respectively derived from Preparation Examples 2-3 and 8-9.

[0080] The amounts of each raw material and the preparation method of the water-based paint with colored dots are the same in the above embodiments and in Embodiment 1.

[0081] Examples 8-10

[0082] Examples 8-10 each provide a water-based paint with colored dots.

[0083] The difference between the above embodiments and Embodiment 1 is that the types of cellulose ethers are different, as detailed below.

[0084] In Example 8: the cellulose ether is EHM 500 cellulose ether.

[0085] In Example 9: the cellulose ether consisted of EHM 500 cellulose ether and HHBR 250 cellulose ether in a weight ratio of 0.4:0.7.

[0086] In Example 10: the cellulose ether consisted of EHM 500 cellulose ether and HHBR 250 cellulose ether in a weight ratio of 0.3:0.8.

[0087] The amounts of each raw material and the preparation method of the water-based paint with colored dots are the same in the above embodiments and in Embodiment 1.

[0088] Examples 11-14

[0089] Examples 11-14 each provide a water-based paint with colored dots.

[0090] The difference between the above embodiments and Embodiment 1 is that the type of emulsion is different, as detailed below.

[0091] In Example 11: The emulsion is Showa 4765 emulsion.

[0092] In Example 12: The emulsion is Badifu 8300 emulsion.

[0093] In Example 13: The emulsion was composed of Showa 4765 emulsion and Badifu 8300 emulsion in a weight ratio of 20:7.

[0094] In Example 14: The emulsion was composed of Showa 4765 emulsion and Badifu 8399 emulsion in a weight ratio of 25:3.

[0095] The amounts of each raw material and the preparation method of the water-based paint with colored dots are the same in the above embodiments and in Embodiment 1.

[0096] Comparative Example

[0097] Comparative Example 1

[0098] This comparative example provides a water-based paint with colored dots.

[0099] The difference between this comparative example and Example 1 is that the amount of each component in the base paint is different, as shown in Table 2.

[0100] The types of raw materials and the preparation method of the water-based paint with colored dots are the same in this comparative example and Example 1.

[0101] Comparative Examples 2-7

[0102] Comparative Examples 2-7 each provide a water-based paint with colored dots.

[0103] The difference between the above comparative examples and Example 1 is that the source of the protective adhesive aqueous solution is different, and they are respectively derived from Preparation Examples 4-7 and 10-11.

[0104] The amounts of each raw material and the preparation method of the water-based paint with colored dots in the above comparative example and Example 1 are the same.

[0105] Performance testing

[0106] (1) Routine testing: The performance of the water-based paints in the examples and comparative examples was tested in accordance with the standards of HG / T4343-2012 "Water-based Multicolor Architectural Coatings" and GB / T 1728-1979 "Determination of Drying Time of Paint Film and Putty Film".

[0107] Test results: The water-based paints with speckled patterns in Examples 1-14 showed no abnormalities in alkali resistance and water resistance, and had a washability of 8500-9500 cycles; the water-based paints with speckled patterns in Comparative Examples 1-7 showed no abnormalities in alkali resistance and water resistance, and had a washability of 6000-8000 cycles.

[0108] (2) Color Dot Strength and Toughness Test

[0109] A 5mm diameter water-based sand spray gun was used to spray each water-based sand coating separately, with the spraying pressure controlled at 0.15MPa. The breakage of the colored particles during spraying was observed, and the breakage rate of the colored particles was calculated.

[0110] (3) Pass rate of colored dots

[0111] The water-based paint with colored dots prepared in the examples and comparative examples was sprayed using a 5mm diameter stone paint spray gun onto a 1 square meter flat plate. The spraying air pressure was 0.6 MPa. The pass rate and average size of the colored dots within 1 square meter were tested. The pass criteria were that the colored dots were uniform in size, round and full, and without any trailing problems.

[0112] The water-based paint for color dots was placed in a 200mL glue container, the lid was tightened and sealed, and then placed in a constant temperature drying oven. It was stored for 30 days under the following conditions: low temperature refrigeration (4±2℃), room temperature (25±2℃), and high temperature heat storage (50±2℃). Then the average size and pass rate of the color dots within the same area were measured to examine the stability of the color dots.

[0113] Test results are shown in Table 3.

[0114] Table 3. Performance test results of the water-based paint for color dots in the examples and comparative examples.

[0115]

[0116]

[0117]

[0118] Based on the test results in Table 3, it can be seen that this application uses a specific weight ratio of BYK S482 adhesive and Laponite RDS adhesive as protective adhesives, and prepares a protective adhesive aqueous solution with bentonite in a specific dosage combination. Then, the protective adhesive aqueous solution is used to prepare a water-in-water coating with colored dots, which can obtain a coating with high colored dot strength and extremely low colored dot shrinkage.

[0119] In Comparative Examples 6-7, the protective adhesive aqueous solution did not contain bentonite, or diatomaceous earth was used instead of bentonite. The resulting water-in-water paint with colored dots had poor strength and high shrinkage rate.

[0120] By comparing the test results of Examples 1-5 with those of Comparative Examples 1-2, it is found that the amount of each component used in the preparation of the protective adhesive aqueous solution and the water-in-water coating with colored dots has a significant impact on the performance of the coating. The embodiments of this application obtain coatings with better performance by reasonably controlling the amount of raw materials.

[0121] By comparing the test results of Examples 1, 6-7 and Comparative Examples 3-5, this application utilizes BYK S482 adhesive and Laponite RDS adhesive in a specific weight ratio of 8-12:3-5 as protective adhesives, which can further improve the strength of the dots in water-in-water paint and further reduce the shrinkage rate of the dots.

[0122] By comparing the test results of Examples 1 and 8-10, this application uses EHM500 cellulose ether and HHBR 250 cellulose ether in a weight ratio of 0.1-0.3:0.8-2.0 as raw material components of the coating, which can further improve the strength of the dots in the water-in-water paint and further reduce the shrinkage rate of the dots.

[0123] By comparing the test results of Examples 1 and 11-14, this application uses Showa 4765 emulsion and Badifu 8399 emulsion with a weight ratio of 20-25:3-7 as raw material components of the coating, which can further improve the color strength of the color dot water-in-water coating and further reduce the shrinkage rate of the color dots.

[0124] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A water-based paint with colored dots, characterized in that, It is prepared from a base paint, a continuous phase and a granulation solution in a mass ratio of (3-5):(1-2):(3-4); The base paint specifically comprises the following components in parts by weight: 0.1-0.5 parts dispersant, 0.1-0.5 parts defoamer, 1.0-2.0 parts antifreeze, 1.0-2.0 parts film-forming aid, 0.2-0.3 parts wetting agent, 1-6 parts kaolin, 0.9-2.3 parts cellulose ether, 1.0-2.0 parts pH adjuster, 15-25 parts emulsion, 0.1-0.5 parts preservative, 0.1-0.5 parts thickener, 5-10 parts protective colloid aqueous solution, and 50-70 parts water; the cellulose ether is composed of EHM 500 cellulose ether and HHBR 250 cellulose ether in a weight ratio of 0.1-0.3:0.8-2.0; the emulsion is composed of Showa 4765 emulsion and Badifu 8399 emulsion in a weight ratio of 20-25:3-7. The continuous phase comprises the following components in parts by weight: 0.1-0.3 parts of defoamer, 0.1-0.5 parts of suspending agent, 50-70 parts of emulsion, 1-10 parts of antifreeze, 1-10 parts of film-forming aid, 0.1-0.5 parts of bactericide, 0.1-0.3 parts of pH adjuster, 0.1-0.5 parts of thickener, and 20-50 parts of water; The granulation solution comprises the following components in parts by weight: 1-10 parts of protective colloid aqueous solution, 0.1-1 parts of bentonite, 0.1-0.5 parts of bactericide, and 85-95 parts of deionized water; The granulation solution contains the following components by weight: 10-16 parts of protective colloid, 9-11 parts of bentonite, and 90-100 parts of water. The protective colloid is composed of BYK S482 adhesive and Laponite RDS adhesive in a weight ratio of 10-12:3-4. The bentonite has a particle size of 500-800 mesh. The preparation method of the protective colloid aqueous solution includes the following steps: adding the protective colloid and bentonite sequentially to water at a rotation speed of 800-1000 r / min and stirring and dispersing for 5-10 min; then adjusting the rotation speed to 1400-1600 r / min and stirring for 50-70 min to obtain the solution.

2. The method for preparing the water-based paint with speckled patterns according to any one of claims 1, characterized in that, Includes the following steps: At a rotation speed of 800-1000 rpm, dispersant, defoamer, antifreeze, film-forming aid, wetting agent, kaolin, and cellulose ether are added sequentially to water and stirred for 4-6 minutes. A pH adjuster is then added. The rotation speed is adjusted to 1400-1600 rpm and stirred for 17-28 minutes. Then, emulsion, preservative, protective colloid aqueous solution, and thickener are added and stirred for 4-6 minutes. The rotation speed is adjusted to 800-1000 rpm and stirred for another 4-6 minutes to obtain the base paint. The base paint is added to the granulation liquid and mixed and stirred to obtain a base coating; the base coating is added to the continuous phase and mixed and stirred to obtain a water-in-water coating with colored dots.

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