A kind of water-coated sand multi-color coating and its preparation method and application

Abstract

The present invention provides a kind of water-in-sand multi-color coating and its preparation method and application. The water-in-sand multi-color coating includes a color point base paint, a granulation liquid and a continuous phase in a mass ratio of (50-65): (15-25): (15-25); the color point base paint includes by weight: 15-25 parts of acrylic emulsion, 0.1-2 parts of cellulose, 1-5 parts of protective glue solution, 1-10 parts of filler, 40-60 parts of white sand, and 20-40 parts of solvent; the granulation liquid includes by weight: 2-6 parts of protective glue, 94-98 parts of solvent; the continuous phase includes by weight: 60-80 parts of silicone acrylic emulsion, 0.1-5 parts of hydroxytyrosol, and 20-40 parts of solvent. The paint film obtained after the present invention is dried has high density, and the surface of the paint film presents strong hydrophilic properties. When water droplets contact the coating surface film, the water droplets quickly spread to form a water film and flow away, taking away pollutants, thereby achieving a self-cleaning effect.

Description

Technical Field

[0001] The invention relates to the technical field of architectural coatings, in particular to a water-coated sand multi-color coating and a preparation method and application thereof. Background Art

[0002] As a new type of stone-like paint, water-based sand multi-color paint has excellent stone-like effects, but due to the texture effect of the product itself, it has the problem of poor stain resistance. In order to achieve excellent stain resistance, a topcoat must be applied on the multi-color paint during product construction, which increases the construction cycle and increases labor costs. In order to meet deadlines and save labor costs, some construction projects do not apply the topcoat in accordance with standard construction process requirements, resulting in poor stain resistance and water resistance of the paint film, which seriously affects the quality of the project and the appearance.

[0003] CN113462247A discloses a water-based sand-containing multi-color coating and a preparation method thereof. The water-based sand-containing multi-color coating and a preparation method thereof of the invention, by modifying the protective glue magnesium lithium silicate, makes the coating have self-cleaning properties, anti-fouling and dustproof, the protective glue solution has good compatibility with the continuous phase, the used continuous phase emulsion and the protective glue remain relatively inert, the post-thickening phenomenon is reduced, and the storage stability is improved. However, the preparation of the water-based sand-containing multi-color coating described in the invention patent is by modifying the protective glue magnesium aluminum silicate, so that the water-based sand-containing multi-color coating has self-cleaning and anti-fouling and dustproof properties. The modified production process of the protective glue magnesium aluminum silicate is complicated and difficult to operate. It is difficult for each coating production enterprise to produce on a large scale, which limits the market promotion and use of the product.

[0004] CN112480763A discloses a water-in-water multi-color marble-like paint without covering and its preparation method. It is mainly prepared from the following components in the following weight ratio: 38-42 parts of base paint, 20 parts of protective glue, 40 parts of continuous phase emulsion, 0.1-0.2 parts of pH alkaline regulator; wherein the continuous phase emulsion is mainly prepared from the following components in the following weight ratio: 20.55-22.35 parts of water, 0.15-0.25 parts of defoamer, 30-70 parts of water-based fluorocarbon emulsion, 38-42 parts of pure acrylic emulsion, 2.6-3 parts of ethylene glycol or propylene glycol, 3.5-4.5 parts of film-forming aid, 0.1-0.2 parts of pH alkaline regulator. The invention uses a continuous phase emulsion of water-based fluorocarbon emulsion and a pure acrylic emulsion to form the main film-forming material, thereby improving the water resistance and other properties of the paint film. However, the top-free water-in-water multi-colored marble-like paint described in the invention improves the water resistance, weather resistance, acid rain resistance and weather resistance of the paint film by increasing the proportion of water-based fluorocarbon emulsion in the main material. The product cost is high and the product stability is uncontrollable.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] One of the purposes of the present invention is to provide a water-in-sand multi-color paint, which is a self-cleaning water-in-sand multi-color paint without a topcoat. After the water-in-sand multi-color paint is dried, the paint film has high density and the paint film surface exhibits strong hydrophilic properties. When water droplets come into contact with the surface film of the paint, the water droplets quickly spread to form a water film and flow away, taking away pollutants, thereby achieving a self-cleaning effect.

[0007] The second object of the present invention is to provide a method for preparing the water-in-sand multi-color paint, the method comprising the following steps: mixing the components in the color dot base paint to obtain the color dot base paint; mixing the components in the granulation liquid to obtain the granulation liquid; mixing the components in the continuous phase to obtain the continuous phase; mixing the color dot base paint and the granulation liquid, dispersing and granulating to obtain a sand-containing granular liquid; mixing the sand-containing granular liquid and the continuous phase, stirring to obtain the water-in-sand multi-color paint. The method for preparing the water-in-sand multi-color paint is simple, easy to operate, suitable for industrial production, and the water-in-sand multi-color paint produced has low cost and further improved product stability.

[0008] The third object of the present invention is to provide an application of the water-based sand multi-color paint in the preparation of architectural paint.

[0009] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are particularly adopted:

[0010] In a first aspect, the present invention provides a water-in-sand multi-color paint, the water-in-sand multi-color paint comprising a color point base paint, a granulation liquid and a continuous phase in a mass ratio of (50-65):(15-25):(15-25);

[0011] The color dot base paint comprises, by weight: 15-25 parts of acrylic emulsion, 0.1-2 parts of cellulose, 1-5 parts of protective glue solution, 1-10 parts of filler, 40-60 parts of white sand, and 20-40 parts of solvent;

[0012] The granulation liquid comprises, by weight: 2-6 parts of protective glue and 94-98 parts of solvent;

[0013] The continuous phase comprises, by weight: 60-80 parts of silicone-acrylic emulsion, 0.1-5 parts of hydroxytyrosol, and 20-40 parts of solvent.

[0014] In the present invention, hydroxytyrosol is added to the continuous phase. Hydroxytyrosol has two phenolic hydroxyl groups and one alcoholic hydroxyl group, and is an amphiphilic molecule with both phenolic hydroxyl and alcoholic hydroxyl properties. The alcoholic hydroxyl group can undergo a cross-linking reaction with the protective glue in the colorful coating to improve the compactness of the paint film; due to the P-π conjugation between O and the benzene ring, the electrons of O are biased toward the benzene ring, making O more electron-deficient than before, which is conducive to the attraction of the electron cloud between OH, has a large polarity, and is easy to form hydrogen bonds with water, so that the surface of the paint film presents strong hydrophilicity. Therefore, the water-encapsulated sand-based colorful coating provided by the present invention has a high density of the paint film after drying, and the surface of the paint film presents strong hydrophilicity. When rainwater contacts the surface of the paint film, water droplets quickly spread to form a water film and flow away, taking away pollutants, thereby achieving a self-cleaning effect.

[0015] In the present invention, acrylic emulsion is selected as the base emulsion of the color dot base paint, which has excellent elongation and good compatibility with the components in the color dot base paint, and can effectively disperse the components such as cellulose, protective glue, filler, and white sand to obtain a uniform phase solution. Adding silicone acrylic emulsion to the continuous phase can effectively improve the water resistance, aging resistance, scrub resistance and other properties of the paint film, and the adhesion of the paint film can also be significantly improved.

[0016] Preferably, the acrylic emulsion is a core-shell polymerization acrylate copolymer emulsion.

[0017] Among them, the mass ratio of the color point base paint, the granulation liquid and the continuous phase is (50-65):(15-25):(15-25), for example, it can be 50:25:25, 55:20:25, 55:25:20, 60:15:25, 60:25:15, 65:15:20, 65:20:15, etc.

[0018] In the color point base paint, the content of acrylic emulsion is 15-25 parts, for example, it can be 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, etc.

[0019] In the color dot base paint, the content of cellulose is 0.1-2 parts, for example, it can be 0.1 parts, 0.2 parts, 0.4 parts, 0.6 parts, 0.8 parts, 1 parts, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, etc., preferably 0.1-1.3 parts.

[0020] In the color dot base paint, the content of the protective glue solution is 1-5 parts, for example, it can be 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, etc., preferably 3-5 parts.

[0021] In the color dot base paint, the content of filler is 1-10 parts, for example, it can be 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, etc., preferably 1-6 parts.

[0022] In the color point base paint, the content of white sand is 40-60 parts, for example, it can be 40 parts, 42 parts, 44 parts, 46 parts, 48 ​​parts, 50 parts, 52 parts, 54 parts, 56 parts, 58 parts, 60 parts, etc.

[0023] In the color point base paint, the solvent content is 20-40 parts, for example, it can be 20 parts, 22 parts, 24 parts, 26 parts, 28 parts, 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, etc.

[0024] In the granulation liquid, the content of the protective colloid is 2-6 parts, for example, it can be 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, 5.5 parts, 6 parts, etc., preferably 3-5 parts.

[0025] In the granulation liquid, the content of the solvent is 94-98 parts, for example, it can be 94 parts, 94.5 parts, 95 parts, 95.5 parts, 96 parts, 96.5 parts, 97 parts, 97.5 parts, 98 parts, etc., preferably 94.5-94.7 parts.

[0026] In the continuous phase, the content of silicone acrylic emulsion is 60-80 parts, for example, it can be 60 parts, 62 parts, 64 parts, 68 parts, 70 parts, 72 parts, 74 parts, 76 parts, 78 parts, 80 parts, etc.

[0027] In the continuous phase, the content of hydroxytyrosol is 0.1-5 parts, for example, it can be 0.1 parts, 0.5 parts, 1 parts, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, etc., preferably 1-3 parts.

[0028] In the continuous phase, the content of the solvent is 20-40 parts, for example, it can be 20 parts, 22 parts, 24 parts, 26 parts, 28 parts, 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, etc.

[0029] Preferably, the acrylic emulsion is a core-shell polymerization acrylate copolymer emulsion.

[0030] Preferably, the acrylic emulsion is selected from RS2788 and / or AP4765.

[0031] Preferably, the cellulose comprises hydroxyethyl cellulose and / or hydrophobically associating cellulose.

[0032] In the present invention, the cellulose is selected from a combination of hydroxyethyl cellulose and hydrophobically associated cellulose, which cooperate with each other to synergistically enhance the effect, can further reduce the amount of protective glue, and make the cellulose and the emulsion cross-linked to form a network structure, thereby improving the strength of the base paint itself and making the final colorful particles uniform in size.

[0033] Preferably, the mass ratio of hydroxyethyl cellulose to hydrophobically associated cellulose is (4-8):(0-5);

[0034] Among them, "4-8" can be, for example, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, etc.;

[0035] Among them, “0-5” can be, for example, 0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, etc.

[0036] In the color dot base paint, the content of hydroxyethyl cellulose is 0.4-0.8 parts, for example, it can be 0.4 parts, 0.45 parts, 0.5 parts, 0.55 parts, 0.6 parts, 0.65 parts, 0.7 parts, 0.75 parts, 0.8 parts, etc.

[0037] In the color dot base paint, the content of hydrophobically associating cellulose is 0.1-0.5 parts, for example, it can be 0.1 parts, 0.15 parts, 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, 0.5 parts, etc.

[0038] Preferably, the protective colloid solution is a lithium magnesium silicate solution.

[0039] Preferably, the purity of the lithium magnesium silicate is 90-93%, for example, it can be 90%, 90.5%, 91%, 91.5%, 92%, 92.5%, 93%, etc., and the particle size is 0.3-2.5μm, for example, it can be 0.3μm, 0.4μm, 0.6μm, 0.8μm, 1μm, 1.2μm, 1.4μm, 1.6μm, 1.8μm, 2μm, 2.2μm, 2.5μm, etc.

[0040] Preferably, the protective glue solution comprises, by mass percentage, 8-12% protective glue, 0-0.2% fungicide, and 88-92% water.

[0041] Taking the total mass of the protective gel solution as 100%, the content of the protective gel is 8-12%, for example, 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 11.5%, 12%, etc., preferably 10%.

[0042] Taking the total mass of the protective gel solution as 100%, the content of the fungicide is 0-0.2%, for example, it can be 0%, 0.02%, 0.05%, 0.08%, 0.1%, 0.12%, 0.15%, 0.18%, 0.2%, etc., preferably 0.1-0.2%.

[0043] Taking the total mass of the protective glue solution as 100%, the water content is 88-92%, for example, 88%, 88.5%, 89%, 89.5%, 90%, 90.5%, 91%, 91.5%, 92%, etc., preferably 89.8-89.9%.

[0044] Preferably, the filler comprises calcined kaolin and / or titanium dioxide.

[0045] Preferably, the mass ratio of the calcined kaolin and titanium dioxide is (1-5):(0-1);

[0046] Here, “1-5” can be, for example, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, etc.;

[0047] Here, “0-1” can be, for example, 0, 0.2, 0.4, 0.6, 0.8, 1, etc.

[0048] In the color dot base paint, the content of calcined kaolin is 1-5 parts, for example, it can be 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, etc.

[0049] In the color dot base paint, the content of titanium dioxide is 0-1 part, for example, it can be 0 part, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, etc.

[0050] Preferably, the particle size of the white sand is 80-120 mesh, for example, it can be 80 mesh, 85 mesh, 90 mesh, 95 mesh, 100 mesh, 105 mesh, 110 mesh, 115 mesh, 120 mesh, etc.

[0051] Preferably, the solvent in the color dot base paint is water.

[0052] Preferably, the color dot base paint further comprises any one of a dispersant, a defoamer, a pH adjuster, an antifreeze agent, a film-forming aid, a preservative, a bactericide or a toner, or a combination of at least two thereof.

[0053] Preferably, the dispersant is a polyacrylate ammonium salt type dispersant or a polycarboxylate sodium salt type dispersant.

[0054] Preferably, the dispersant is selected from any one of Nopco SN5027, Nopco SN5040 or Dow 731A, or a combination of at least two thereof.

[0055] Preferably, the defoamer is selected from any one of mineral oil defoamers, silicon dioxide defoamers or paraffin defoamers, or a combination of at least two thereof.

[0056] Preferably, the defoamer is selected from any one of Nopco NXZ (mineral oil defoamer), Nopco SN154 (silicon dioxide defoamer) or SN1340 (paraffin defoamer Nopco), or a combination of at least two thereof.

[0057] Preferably, the pH adjuster is 2-amino-2-methyl-1-propanol.

[0058] Preferably, the pH adjuster is selected from Dow AMP-95.

[0059] Preferably, the antifreeze agent is selected from ethylene glycol and / or propylene glycol.

[0060] Preferably, the film-forming aid is selected from 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate.

[0061] Preferably, the film-forming aid is selected from any one of Eastman TAXANOL, Runtai RTC-12 or Colas C-12, or a combination of at least two thereof.

[0062] Preferably, the preservative is selected from BIT preservatives or BIT / MIT preservatives.

[0063] Preferably, the preservative is selected from any one of Thor MBS (BIT / MIT preservative), Hichemase BT20 (BIT preservative) or Hichemase BTE (BIT preservative) or a combination of at least two thereof.

[0064] Preferably, the fungicide is selected from the group consisting of Kathon fungicides.

[0065] Preferably, the fungicide is selected from any one of Dow LXE, Hikmax NKS or Hikmax MD, or a combination of at least two thereof.

[0066] Preferably, the toner is selected from water-based iron oxide series color paste and / or water-based carbon black paste.

[0067] Preferably, the color dot base paint also includes, by weight: 0-2 parts of film-forming aid, 0-1 parts of antifreeze agent, 0-0.4 parts of dispersant, 0-0.4 parts of defoaming agent, 0-0.2 parts of pH adjuster, 0-0.3 parts of preservative, 0-0.2 parts of bactericide, and 0-1 parts of colorant.

[0068] In the color point base paint, the content of the film-forming aid is 0-2 parts, for example, it can be 0 parts, 0.2 parts, 0.4 parts, 0.6 parts, 0.8 parts, 1 parts, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, etc., preferably 1-2 parts.

[0069] In the color point base paint, the content of antifreeze is 0-1 part, for example, it can be 0 part, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, etc., preferably 0.5-1 part.

[0070] In the color point base paint, the content of the dispersant is 0-0.4 parts, for example, it can be 0 parts, 0.1 parts, 0.15 parts, 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, etc., preferably 0.1-0.4 parts.

[0071] In the color point base paint, the content of the defoamer is 0-0.4 parts, for example, it can be 0 parts, 0.02 parts, 0.05 parts, 0.1 parts, 0.15 parts, 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, etc., preferably 0.2-0.4 parts.

[0072] In the color dot base paint, the content of pH adjuster is 0-0.2 parts, for example, it can be 0 parts, 0.02 parts, 0.05 parts, 0.08 parts, 0.1 parts, 0.12 parts, 0.15 parts, 0.18 parts, 0.2 parts, etc., preferably 0.1-0.2 parts.

[0073] In the color point base paint, the content of preservative is 0-0.3 parts, for example, it can be 0 parts, 0.02 parts, 0.05 parts, 0.08 parts, 0.1 parts, 0.12 parts, 0.15 parts, 0.18 parts, 0.2 parts, 0.22 parts, 0.24 parts, 0.26 parts, 0.28 parts, 0.3 parts, etc., preferably 0.1-0.3 parts.

[0074] In the color dot base paint, the content of fungicide is 0-0.2 parts, for example, it can be 0 parts, 0.02 parts, 0.05 parts, 0.08 parts, 0.1 parts, 0.12 parts, 0.15 parts, 0.18 parts, 0.2 parts, etc., preferably 0.1-0.2 parts.

[0075] In the color point base paint, the content of the colorant is 0-1 part, for example, it can be 0 part, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, etc.

[0076] Preferably, the purity of the lithium magnesium silicate is 90-93%, for example, it can be 90%, 90.5%, 91%, 91.5%, 92%, 92.5%, 93%, etc., and the particle size is 0.3-2.5μm, for example, it can be 0.3μm, 0.4μm, 0.6μm, 0.8μm, 1μm, 1.2μm, 1.4μm, 1.6μm, 1.8μm, 2μm, 2.2μm, 2.5μm, etc.

[0077] Preferably, the solvent in the granulation liquid is water.

[0078] Preferably, the granulation liquid further comprises a suspending agent and / or a bactericide.

[0079] Preferably, the suspending agent is selected from bentonite suspending agents and / or xanthan gum suspending agents.

[0080] Preferably, the suspending agent is selected from any one of DC118 (bentonite suspending agent), XG100 (xanthan gum suspending agent) or J-20 (xanthan gum suspending agent) or a combination of at least two thereof.

[0081] Preferably, the fungicide is selected from the group consisting of kasson fungicides.

[0082] Preferably, the granulation liquid further comprises, by weight: 0-0.4 parts of suspending agent and 0-0.2 parts of bactericide.

[0083] In the granulation liquid, the content of the suspending agent is 0-0.4 parts, for example, it can be 0 parts, 0.02 parts, 0.05 parts, 0.1 parts, 0.15 parts, 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, etc., preferably 0.1-0.4 parts.

[0084] In the granulation liquid, the content of the bactericide is 0-0.2 parts, for example, it can be 0 parts, 0.02 parts, 0.05 parts, 0.08 parts, 0.1 parts, 0.12 parts, 0.15 parts, 0.18 parts, 0.2 parts, etc., preferably 0.1-0.2 parts.

[0085] Preferably, the silicone-acrylic emulsion is selected from any one of RS3799A, KD98C or 8087A, or a combination of at least two of them.

[0086] Among them, RS3799A: viscosity 10-80mPa·s, solid content 39-41%.

[0087] Among them, KD98C: viscosity <100mPa·s, solid content 29-31%.

[0088] Among them, 8087A: viscosity 10-800mPa·s, solid content 39-41%.

[0089] Preferably, the solvent in the continuous phase is water.

[0090] Preferably, the continuous phase further comprises any one or a combination of at least two of a defoaming agent, a film-forming aid, an antifreeze agent, a pH regulator, a thickener, a bactericide or a preservative.

[0091] Preferably, the defoamer is selected from any one of mineral oil defoamers, silicon dioxide defoamers or paraffin defoamers, or a combination of at least two thereof.

[0092] Preferably, the film-forming aid is selected from 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate.

[0093] Preferably, the antifreeze agent is selected from ethylene glycol and / or propylene glycol.

[0094] Preferably, the pH adjuster is 2-amino-2-methyl-1-propanol.

[0095] Preferably, the thickener is selected from hydrophobic alkali-swellable associative thickeners.

[0096] Preferably, the fungicide is selected from the group consisting of Kathon fungicides.

[0097] Preferably, the preservative is selected from BIT preservatives or BIT / MIT preservatives.

[0098] Preferably, the continuous phase further comprises, by weight: 0-4 parts of film-forming aid, 0-4 parts of antifreeze agent, 0-1 parts of thickener, 0-0.2 parts of defoaming agent, 0-0.2 parts of pH regulator, 0-0.2 parts of preservative, and 0-0.2 parts of bactericide.

[0099] In the continuous phase, the content of the film-forming aid is 0-4 parts, for example, it can be 0 parts, 0.2 parts, 0.4 parts, 0.6 parts, 0.8 parts, 1 parts, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, 2.2 parts, 2.5 parts, 2.8 parts, 3 parts, 3.2 parts, 3.5 parts, 3.8 parts, 4 parts, etc., preferably 3-4 parts.

[0100] In the continuous phase, the content of antifreeze is 0-4 parts, for example, it can be 0 parts, 0.2 parts, 0.4 parts, 0.6 parts, 0.8 parts, 1 parts, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, 2.2 parts, 2.5 parts, 2.8 parts, 3 parts, 3.2 parts, 3.5 parts, 3.8 parts, 4 parts, etc., preferably 3-4 parts.

[0101] In the continuous phase, the content of the thickener is 0-1 part, for example, it can be 0 part, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, etc., preferably 0.6-1 part.

[0102] In the continuous phase, the content of the defoaming agent is 0-0.2 parts, for example, it can be 0 parts, 0.02 parts, 0.05 parts, 0.08 parts, 0.1 parts, 0.12 parts, 0.15 parts, 0.18 parts, 0.2 parts, etc., preferably 0.1-0.2 parts.

[0103] In the continuous phase, the content of the pH adjuster is 0-0.2 parts, for example, it can be 0 parts, 0.02 parts, 0.05 parts, 0.08 parts, 0.1 parts, 0.12 parts, 0.15 parts, 0.18 parts, 0.2 parts, etc., preferably 0.1-0.2 parts.

[0104] In the continuous phase, the content of the preservative is 0-0.2 parts, for example, it can be 0 parts, 0.02 parts, 0.05 parts, 0.08 parts, 0.1 parts, 0.12 parts, 0.15 parts, 0.18 parts, 0.2 parts, etc., preferably 0.1-0.2 parts.

[0105] In the continuous phase, the content of the bactericide is 0-0.2 parts, for example, it can be 0 parts, 0.02 parts, 0.05 parts, 0.08 parts, 0.1 parts, 0.12 parts, 0.15 parts, 0.18 parts, 0.2 parts, etc., preferably 0.1-0.2 parts.

[0106] In the present invention, hydroxytyrosol can be produced by Shaanxi Panier Biotechnology Co., Ltd.

[0107] In the present invention, the hydrophobically associated cellulose can be selected from HE-10KB and HE-3KB produced by Ashland and EHM500 and EBS481FQ produced by AkzoNobel.

[0108] In the present invention, the hydroxyethyl cellulose can be selected from 250HBR and 250HHBR produced by Ashland or HS-30000YP2 and HS-100000YP2 produced by Shin-Etsu.

[0109] In the present invention, the protective glue can be lithium magnesium silicate, such as BYK S-482, Grid GTS, Hemmings RD, etc.

[0110] In the present invention, the thickener can be selected from Dow TT935, TT-615 or BASF 1152, 1153 thickeners.

[0111] In the present invention, the acrylic emulsion can be Budford RS-2788 or Showa AP4765.

[0112] In the present invention, the silicone acrylic emulsion can be selected from one of Badfu RS-3799A, Wanhua 8087A, and Baolijia KD98C.

[0113] In a second aspect, the present invention provides a method for preparing the water-in-sand multi-color coating as described in the first aspect, the preparation method comprising the following steps:

[0114] Mixing ingredients: taking the components in the color dot base paint and mixing them to obtain the color dot base paint; taking the components in the granulation liquid and mixing them to obtain the granulation liquid; taking the components in the continuous phase and mixing them to obtain the continuous phase;

[0115] The color dot base paint and the granulation liquid are mixed, dispersed and granulated to obtain a sand-containing color granule liquid;

[0116] The sand-colored particle liquid and the continuous phase are mixed and stirred to obtain the water-in-sand multi-colored paint.

[0117] Preferably, the rotation speed of mixing the components in the color point base paint is 1400-1500rpm, for example, it can be 1400rpm, 1420rpm, 1440rpm, 1460rpm, 1480rpm, 1500rpm, etc., and the time is 20-30min, for example, it can be 20min, 22min, 24min, 26min, 28min, 30min, etc.

[0118] Preferably, the rotation speed of mixing the components in the granulation liquid is 1000-1200rpm, for example, it can be 1000rpm, 1050rpm, 1100rpm, 1150rpm, 1200rpm, etc., and the time is 30-40min, for example, it can be 30min, 32min, 34min, 36min, 38min, 40min, etc.

[0119] Preferably, the mixing speed of the components in the continuous phase is 1000-1200 rpm, for example, it can be 1000 rpm, 1050 rpm, 1100 rpm, 1150 rpm, 1200 rpm, etc., and the time is 15-20 min, for example, it can be 15 min, 16 min, 17 min, 18 min, 19 min, 20 min, etc.

[0120] Preferably, the dispersion granulation rotation speed is 1000-1200rpm, for example, it can be 1000rpm, 1050rpm, 1100rpm, 1150rpm, 1200rpm, etc., and the time is 30-40min, for example, it can be 30min, 32min, 34min, 36min, 38min, 40min, etc.

[0121] Preferably, the particle size of the sand-colored granular liquid is 0.5-10 mm, for example, it can be 0.5 mm, 1 mm, 2 mm, 4 mm, 6 mm, 8 mm, 10 mm, etc.

[0122] Preferably, the stirring speed is 100-800rpm, for example, it can be 100rpm, 200rpm, 300rpm, 400rpm, 500rpm, 600rpm, 700rpm, 800rpm, etc., and the time is 2-10min, for example, it can be 2min, 3min, 4min, 5min, 6min, 7min, 8min, 9min, 10min, etc.

[0123] Preferably, the viscosity of the water-in-sand multi-color paint is 95-105ku, for example, it can be 95ku, 96ku, 98ku, 100ku, 102ku, 108ku, etc.

[0124] In a third aspect, the present invention provides a use of the water-based sand multi-color paint as described in the first aspect in the preparation of architectural paint.

[0125] Compared with the prior art, the present invention has the following beneficial effects:

[0126] (1) The water-in-sand multi-color paint provided by the present invention has a high paint film density after drying, and the paint film surface exhibits a strong hydrophilic property. When water droplets come into contact with the paint surface film, the water droplets quickly spread to form a water film and flow away, taking away pollutants, thereby achieving a self-cleaning effect;

[0127] (2) The water-based sand multi-color coating provided by the present invention does not require topcoat construction after construction, and while satisfying the effect of the multi-color paint film itself, it also has excellent stain resistance. DETAILED DESCRIPTION

[0128] Unless otherwise defined herein, scientific and technical terms used in conjunction with the present invention shall have the meanings commonly understood by those of ordinary skill in the art. The meaning and scope of the terms should be clear, however, in the case of any potential ambiguity, the definitions provided herein take precedence over any dictionary or external definitions. In this application, unless otherwise stated, the use of "or" means "and / or". In addition, the use of the term "including" and other forms is non-limiting.

[0129] It should be noted that specific details are described in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in a variety of other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0130] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0131] The present invention is further described below by way of examples. Unless otherwise specified, the materials in the examples are prepared according to existing methods or directly purchased from the market.

[0132] Example 1

[0133] This embodiment provides a water-in-sand multi-color paint, and the water-in-sand multi-color paint comprises the following components in parts by weight:

[0134]

[0135]

[0136] The protective glue solution includes, by mass percentage, 89.8% of deionized water, 10% of protective glue, and 0.2% of fungicide.

[0137] Among them, hydroxytyrosol was produced by Shaanxi Panier Biotechnology Co., Ltd., hydrophobically associating cellulose was HE-10KB from Ashland, hydroxyethyl cellulose was 250HBR from Ashland, acrylic emulsion was Badful RS-2788, protective glue was BYK S-482, silicone acrylic emulsion was Badful RS-3799A, thickener was Dow TT935, bactericide was Dow LXE, preservative was Thor MBS, dispersant was Nopco SN5027, defoamer was Nopco NXZ, pH adjuster was Dow AMP-95, antifreeze was ethylene glycol, film-forming aid was Eastman TAXANOL, and suspending agent was Trust Additive XG100.

[0138] The preparation method of the water-in-sand multi-color coating comprises the following steps:

[0139] (1) Add raw materials in sequence according to the color dot base paint formula, disperse in a dispersion tank at a speed of 1400 rpm for 25 minutes until the slurry is uniform, and use water-based iron oxide and water-based carbon black slurry to color the slurry after preparation for standby;

[0140] (2) Pour the granulation liquid into the dispersion tank in sequence according to the granulation liquid formula, and disperse it at a speed of 1000 rpm for 30 minutes until it becomes a clear and transparent liquid, and set aside for use;

[0141] (3) Pour the continuous phase into the dispersion tank in sequence according to the formula, disperse at a speed of 1000 rpm for 20 minutes, and set aside for later use;

[0142] (4) Add the sand-containing color particle base material to the granulation liquid, disperse it at a speed of 400 rpm for 5 minutes, and granulate it to obtain sand-containing color particles of different colors and sizes. Add the continuous phase to the prepared sand-containing color particles, stir it at a speed of 150 rpm for 3 minutes, adjust the viscosity, and obtain a water-based sand multi-color coating with a viscosity of 100 ku.

[0143] Example 2

[0144] This embodiment provides a water-in-sand multi-color paint, and the water-in-sand multi-color paint comprises the following components in parts by weight:

[0145]

[0146] The protective glue solution includes, by mass percentage, 89.8% of deionized water, 10% of protective glue, and 0.2% of fungicide.

[0147] Among them, hydroxytyrosol was produced by Shaanxi Panier Biotechnology Co., Ltd., hydrophobically associating cellulose was HE-3KB from Ashland, hydroxyethyl cellulose was 250HHBR from Ashland, acrylic emulsion was Showa AP4765, protective glue was grid GTS, silicone acrylic emulsion was Wanhua 8087A, thickener was Dow TT-615, bactericide was Hichem NKS, preservative was Hichem BT20, dispersant was Nopco SN5040, defoamer was Nopco 154, pH adjuster was Dow AMP-95, antifreeze was propylene glycol, film-forming aid was Runtai RTC-12, and suspending agent was Hemmings DC118.

[0148] The preparation method of the water-in-sand multi-color coating comprises the following steps:

[0149] (1) Add raw materials in sequence according to the formula of the color point base paint, disperse in a dispersion tank at a speed of 1500 rpm for 25 minutes until the slurry is uniform, and use water-based iron oxide and water-based carbon black slurry to color the color slurry after preparation for standby;

[0150] (2) Pour the granulation liquid into the dispersion tank in sequence according to the granulation liquid formula, and disperse it at a speed of 1200 rpm for 30 minutes until it becomes a clear and transparent liquid, and set aside for use;

[0151] (3) Pour the continuous phase into the dispersion tank in sequence according to the formula, disperse at a speed of 1200 rpm for 20 minutes, and set aside for use;

[0152] (4) Add the sand-containing color particle base material to the granulation liquid, disperse it at a speed of 600 rpm for 4 minutes, and granulate it to obtain sand-containing color particles of different colors and sizes. Add the continuous phase to the prepared sand-containing color particles, stir it at a speed of 150 rpm for 4 minutes, adjust the viscosity, and obtain a water-based sand multi-color coating with a viscosity of 98 ku.

[0153] Example 3

[0154] This embodiment provides a water-in-sand multi-color paint, and the water-in-sand multi-color paint comprises the following components in parts by weight:

[0155]

[0156] The protective glue solution includes, by mass percentage, 89.8% of deionized water, 10% of protective glue, and 0.2% of fungicide.

[0157] Among them, hydroxytyrosol is produced by Shaanxi Panier Biotechnology Co., Ltd., hydrophobic associating cellulose is AkzoNobel's EHM500, hydroxyethyl cellulose is Ashland's 250HHBR, acrylic emulsion is Showa AP4765, protective glue is Hemmings RD, silicone acrylic emulsion is Baolijia KD98C, thickener is BASF 1152, bactericide is Hichem MD, preservative is Hichem BTE, dispersant is Dow 731A, defoamer is Nopco 1340, pH adjuster is Dow AMP-95, antifreeze is ethylene glycol, film-forming aid is Colax C-12, suspending agent is Grid J-20.

[0158] The preparation method of the water-in-sand multi-color coating comprises the following steps:

[0159] (1) Add raw materials in sequence according to the color dot base paint formula, disperse in a dispersion tank at a speed of 1400 rpm for 25 minutes until the slurry is uniform, and use water-based iron oxide and water-based carbon black slurry to color the slurry after preparation for standby;

[0160] (2) Pour the granulation liquid into the dispersion tank in sequence according to the granulation liquid formula, and disperse it at a speed of 1100 rpm for 30 minutes until it becomes a clear and transparent liquid, and set it aside for use;

[0161] (3) Pour the continuous phase into the dispersion tank in sequence according to the formula, disperse at a speed of 1100 rpm for 20 min, and set aside for later use;

[0162] (4) Add the sand-containing color particle base material to the granulation liquid, disperse it at a speed of 600 rpm for 6 minutes, and granulate it to obtain sand-containing color particles of different colors and sizes. Add the continuous phase to the prepared sand-containing color particles, stir it at a speed of 150 rpm for 2 minutes, adjust the viscosity, and obtain a water-based sand multi-color coating with a viscosity of 100 ku.

[0163] Example 4

[0164] This embodiment provides a water-in-sand multi-color coating, which is different from Embodiment 1 only in that titanium dioxide is not added, the content of calcined kaolin is increased to 3 parts, and the contents of other components and the preparation method are completely the same.

[0165] Example 5

[0166] This embodiment provides a water-in-sand multi-color coating, which is different from Embodiment 1 only in that no hydrophobic associating cellulose is added, the content of hydroxyethyl cellulose is increased to 0.6 parts, and the contents of other components and the preparation method are completely the same.

[0167] Comparative Example 1

[0168] This comparative example provides a water-in-sand multi-color coating, which is different from Example 1 only in that hydroxytyrosol is not added, and the contents of other components and the preparation method are completely the same.

[0169] Comparative Example 2

[0170] This comparative example provides a water-in-sand multi-color coating, which differs from Example 1 only in that hydroxytyrosol is replaced with an equal mass of phenol, and the contents of other components and the preparation method are completely the same.

[0171] Comparative Example 3

[0172] This comparative example provides a water-in-sand multi-color coating, which is different from Example 1 only in that hydroxytyrosol is replaced with an equal mass of phenylethanol, and the contents of other components and the preparation method are completely the same.

[0173] Comparative Example 4

[0174] This comparative example provides a water-in-sand multi-color coating, which is different from Example 1 only in that hydroxytyrosol is replaced with an equal mass of p-hydroxybenzyl alcohol, and the contents of other components and the preparation methods are completely the same.

[0175] Comparative Example 5

[0176] This comparative example provides a water-based sand multi-color paint, which is different from Example 1 in that the pure acrylic emulsion in the color dot base paint is replaced by an equal mass of silicone acrylic emulsion; the silicone acrylic emulsion in the continuous phase is replaced by an equal mass of pure acrylic emulsion, and the other raw material compositions and preparation steps are exactly the same as those in Example 1.

[0177] Comparative Example 6

[0178] This comparative example provides a water-in-sand multi-color coating, which differs from Example 1 in that hydroxytyrosol is not added, and the emulsion in the continuous phase is replaced by an aqueous fluorocarbon emulsion of equal mass, and other raw material compositions and preparation steps are exactly the same as those in Example 1.

[0179] Test Case

[0180] Test samples: the water-in-sand multi-color coatings provided in Examples 1-5 and the water-in-sand multi-color coatings provided in Comparative Examples 1-6;

[0181] Test standard: HG / T4343-2012 "Water-based multi-color architectural coatings" for type testing;

[0182] Test method: The water-in-sand multi-color coatings provided in Examples 1-5 and the water-in-sand multi-color coatings provided in Comparative Examples 1-6 all adopt the construction process of primer → colored mid-coat → water-in-sand main material;

[0183] Among them, comparative example 1 was tested according to the construction process of primer → colored midcoat → water-based sand main material → topcoat;

[0184] The specific test results are shown in Table 1 and Table 2:

[0185] Table 1

[0186]

[0187] Table 2

[0188]

[0189]

[0190] From the comparison of the test data in Table 1 and Table 2, it can be seen that the present invention provides a self-cleaning water-in-sand multi-color coating without topcoat and a preparation method thereof. The water-in-sand multi-color coating provided by the present invention has a high paint film density after drying, and the paint film surface presents a strong hydrophilic property. When water droplets contact the coating surface film, the water droplets quickly spread to form a water film and flow away, taking away pollutants, thereby achieving a self-cleaning effect. The water-in-sand multi-color coating provided by the present invention does not require topcoat construction after construction, and has excellent stain resistance while satisfying the effect of the multi-color paint film itself.

[0191] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water-based sand multi-color paint, It is characterized in that The water-in-sand multi-color paint comprises a color dot base paint, a granulation liquid and a continuous phase in a mass ratio of (50-65):(15-25):(15-25); The color dot base paint comprises, by weight: 15-25 parts of acrylic emulsion, 0.1-2 parts of cellulose, 1-5 parts of protective glue solution, 1-10 parts of filler, 40-60 parts of white sand, and 20-40 parts of solvent; The granulation liquid comprises, by weight: 2-6 parts of protective glue and 94-98 parts of solvent; The continuous phase comprises, by weight: 60-80 parts of silicone-acrylic emulsion, 0.1-5 parts of hydroxytyrosol, and 20-40 parts of solvent.

2. The water-in-sand multi-color paint according to claim 1, It is characterized in that The acrylic emulsion is a core-shell polymerized acrylic ester copolymer emulsion.

3. The water-in-sand multi-color paint according to claim 1, It is characterized in that The cellulose includes hydroxyethyl cellulose and / or hydrophobically associating cellulose.

4. The water-in-sand multi-color paint according to claim 3, It is characterized in that The mass ratio of the hydroxyethyl cellulose to the hydrophobically associated cellulose is (4-8):(0-5).

5. The water-in-sand multi-color paint according to claim 1, It is characterized in that The protective glue solution is a lithium magnesium silicate solution.

6. The water-in-sand multi-color paint according to claim 5, It is characterized in that The purity of the lithium magnesium silicate is 90-93%, and the particle size is 0.3-2.5 μm.

7. The water-in-sand multi-color paint according to claim 1, It is characterized in that The protective glue solution comprises, by mass percentage, 8-12% protective glue, 0-0.2% fungicide, and 88-92% water.

8. The water-in-sand multi-color paint according to claim 1, It is characterized in that The filler includes calcined kaolin and / or titanium dioxide.

9. The water-in-sand multi-color paint according to claim 8, It is characterized in that The mass ratio of the calcined kaolin and titanium dioxide is (1-5):(0-1).

10. The water-in-sand multi-color paint according to claim 1, It is characterized in that The particle size of the white sand is 80-120 meshes.

11. The water-in-sand multi-color paint according to claim 1, It is characterized in that The solvent in the color dot base paint is water.

12. The water-in-sand multi-color paint according to claim 1, It is characterized in that The color dot base paint also includes any one of a dispersant, a defoamer, a pH regulator, an antifreeze agent, a film-forming aid, a preservative, a bactericide or a toner, or a combination of at least two of them.

13. The water-in-sand multi-color paint according to claim 12, It is characterized in that The dispersant is a polyacrylate ammonium salt type dispersant or a polycarboxylate sodium salt type dispersant.

14. The water-in-sand multi-color paint according to claim 12, It is characterized in that The defoamer is selected from any one of mineral oil defoamers, silicon dioxide defoamers or paraffin defoamers, or a combination of at least two of them.

15. The water-in-sand multi-color paint according to claim 12, It is characterized in that The pH regulator is 2-amino-2-methyl-1-propanol.

16. The water-in-sand multi-color paint according to claim 12, It is characterized in that The antifreeze agent is selected from ethylene glycol and / or propylene glycol.

17. The water-in-sand multi-color paint according to claim 12, It is characterized in that The film-forming aid is selected from 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate.

18. The water-in-sand multi-color paint according to claim 12, It is characterized in that The preservative is selected from BIT preservatives or BIT / MIT preservatives.

19. The water-in-sand multi-color paint according to claim 12, It is characterized in that The bactericide is selected from kasson bactericides.

20. The water-in-sand multi-color paint according to claim 12, It is characterized in that The toner is selected from water-based iron oxide series color paste and / or water-based carbon black paste.

21. The water-in-sand multi-color paint according to claim 1, It is characterized in that The color dot base paint also includes, by weight: 0-2 parts of film-forming aid, 0-1 parts of antifreeze agent, 0-0.4 parts of dispersant, 0-0.4 parts of defoaming agent, 0-0.2 parts of pH adjuster, 0-0.3 parts of preservative, 0-0.2 parts of bactericide, and 0-1 parts of colorant.

22. The water-in-sand multi-color paint according to claim 1, It is characterized in that The protective colloid in the granulation liquid is lithium magnesium silicate.

23. The water-in-sand multi-color paint according to claim 22, It is characterized in that The purity of the lithium magnesium silicate is 90-93%, and the particle size is 0.3-2.5 μm.

24. The water-in-sand multi-color paint according to claim 1, It is characterized in that The solvent in the granulation liquid is water.

25. The water-in-sand multi-color paint according to claim 1, It is characterized in that The granulation liquid also includes a suspending agent and / or a bactericide.

26. The water-in-sand multi-color paint according to claim 25, It is characterized in that The suspending agent is selected from bentonite suspending agents and / or xanthan gum suspending agents.

27. The water-in-sand multi-color paint according to claim 25, It is characterized in that The bactericide is selected from kasson bactericides.

28. The water-in-sand multi-color paint according to claim 25, It is characterized in that The granulation liquid further comprises, by weight: 0-0.4 parts of suspending agent and 0-0.2 parts of bactericide.

29. The water-in-sand multi-color paint according to claim 1, It is characterized in that The solvent in the continuous phase is water.

30. The water-in-sand multi-color paint according to claim 1, It is characterized in that The continuous phase also includes any one or a combination of at least two of a defoaming agent, a film-forming aid, an antifreeze agent, a pH regulator, a thickener, a bactericide or a preservative.

31. The water-in-sand multi-color paint according to claim 30, It is characterized in that The defoamer is selected from any one of mineral oil defoamers, silicon dioxide defoamers or paraffin defoamers, or a combination of at least two of them.

32. The water-in-sand multi-color paint according to claim 30, It is characterized in that The film-forming aid is selected from 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate.

33. The water-in-sand multi-color paint according to claim 30, It is characterized in that The antifreeze agent is selected from ethylene glycol and / or propylene glycol.

34. The water-in-sand multi-color paint according to claim 30, It is characterized in that The pH regulator is 2-amino-2-methyl-1-propanol.

35. The water-in-sand multi-color paint according to claim 30, It is characterized in that The thickener is selected from hydrophobic alkali swelling associative thickeners.

36. The water-in-sand multi-color paint according to claim 30, It is characterized in that The bactericide is selected from kasson bactericides.

37. The water-in-sand multi-color paint according to claim 30, It is characterized in that The preservative is selected from BIT preservatives or BIT / MIT preservatives.

38. The water-in-sand multi-color paint according to claim 30, It is characterized in that The continuous phase further comprises, by weight: 0-4 parts of film-forming aid, 0-4 parts of antifreeze agent, 0-1 parts of thickener, 0-0.2 parts of defoamer, 0-0.2 parts of pH regulator, 0-0.2 parts of preservative, and 0-0.2 parts of bactericide.

39. A method for preparing a water-in-sand multi-color coating according to any one of claims 1 to 38, It is characterized in that The preparation method The following steps are involved: Batching: taking the components in the color dot base paint and mixing them to obtain the color dot base paint; taking the components in the granulation liquid and mixing them to obtain the granulation liquid; taking the components in the continuous phase and mixing them to obtain the continuous phase; The color dot base paint and the granulation liquid are mixed, dispersed and granulated to obtain a sand-containing color granule liquid; The sand-colored particle liquid and the continuous phase are mixed and stirred to obtain the water-in-sand multi-colored paint.

40. The method for preparing the water-in-sand multi-color coating according to claim 39, It is characterized in that The components in the color dot base paint are mixed at a rotation speed of 1400-1500 rpm for 20-30 minutes.

41. The method for preparing the water-in-sand multi-color coating according to claim 39, It is characterized in that The components in the granulation liquid are mixed at a rotation speed of 1000-1200 rpm for 30-40 min.

42. The method for preparing the water-in-sand multi-color coating according to claim 39, It is characterized in that The components in the continuous phase are mixed at a speed of 1000-1200 rpm for 15-20 min.

43. The method for preparing the water-in-sand multi-color coating according to claim 39, It is characterized in that The dispersion granulation speed is 1000-1200 rpm, and the time is 30-40 min.

44. The method for preparing the water-in-sand multi-color coating according to claim 43, It is characterized in that The particle size of the sand-colored granular liquid is 0.5-10 mm.

45. The method for preparing the water-based sand multi-color coating according to claim 39, It is characterized in that The stirring speed is 100-800 rpm and the time is 2-10 min.

46. ​​The method for preparing the water-in-sand multi-color coating according to claim 45, It is characterized in that The viscosity of the water-in-sand multi-color paint is 95-105 ku.

47. Use of the water-based sand multi-color paint according to any one of claims 1 to 38 in the preparation of architectural coatings.

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