A water-in-water multicolor paint resistant to condensation and its preparation method

Abstract

This application relates to the field of coatings. More specifically, it relates to a water-in-water multicolor coating with anti-condensation and its preparation method. A water-in-water multicolor coating with anti-condensation includes a protective colloid solution, a color-toned base paint, and a continuous phase; the color-toned base paint includes a color paste and a base paint; the base paint includes: a dispersant, an aerogel dispersion paste A, an antifoaming agent A, a filler, cellulose, an auxiliary agent A, a preservative A, a base paint emulsion, a film-forming auxiliary agent A, an antifreeze A, a protective colloid diluent, and water; the protective colloid solution includes: a protective colloid powder, a thickening agent A, a preservative B, and water; the continuous phase includes: an aerogel dispersion paste B, a preservative C, an antifreeze B, a film-forming auxiliary agent B, a continuous phase emulsion, an auxiliary agent B, an antifoaming agent B, a thickening agent B, and water. This application has the advantage of improving the whiting of the water-in-water multicolor coating in a humid environment.

Description

Technical Field

[0001] The present application relates to the field of coatings, and more specifically, to a water-in-water multicolor coating with anti-condensation and a preparation method thereof. Background Art

[0002] The water-in-water multicolor coating mainly consists of a protective colloid, a base paint, and a continuous phase. All three are water-based systems, so it is called water-in-water. The water-in-water multicolor coating mainly extracts and wraps liquid water-based resin around colloidal water-based color particles to make them suspended in the water-based emulsion. The colors shown by the water-in-water multicolor coating are more vivid and have a higher simulation degree. It is the best product to replace exterior wall granite, so it has been favored by the market.

[0003] Most of the water-in-water multicolor coatings on the market, after drying and forming a film, due to the addition of more hydrophilic substances in their formulations, may absorb water vapor in the air in a humid environment, resulting in a relatively high moisture content in the multicolor paint film, making the paint film turn white and soft. Especially in the south, the water vapor in the air is heavier, and there are more rainy days. The wall surface is easily exposed to a humid environment for a long time and even soaked by rainwater for a long time, causing the paint film to turn white, affecting the decorative effect and durability of the multicolor paint. Therefore, there is still room for improvement. Summary of the Invention

[0004] In order to improve the problem of the water-in-water multicolor coating turning white in a humid environment, the present application provides a water-in-water multicolor coating with anti-condensation and a preparation method thereof.

[0005] In the first aspect, the present application provides a water-in-water multicolor coating with anti-condensation, adopting the following technical solution:

[0006] A water-in-water multicolor coating with anti-condensation, comprising a protective colloid solution, a color-matching base paint, and a continuous phase. The mass ratio of the color-matching base paint, the protective colloid solution, and the continuous phase is (3 - 5) : (2 - 4) : (2 - 4);

[0007] The color-matching base paint includes a color paste and a base paint. By mass percentage, the color paste accounts for 0.1 - 1% of the color-matching base paint, and the base paint makes up the balance to 100%;

[0008] In the base paint, by mass percentage, it includes the following raw materials: 0.1 - 1% dispersant, 15 - 30% aerogel dispersion paste A, 0 - 1% defoamer A, 5 - 20% filler, 0.1 - 2% cellulose, 0 - 1% auxiliary agent A, 0 - 1% preservative A, 18 - 30% base paint emulsion, 0 - 1.5% film-forming auxiliary agent A, 0 - 1.5% antifreeze agent A, 5 - 10% protective colloid diluent, and water makes up the balance to 100%;

[0009] In the protective colloid solution, by mass percentage, it includes the following raw materials: 5-10% protective colloid powder, 0-1% thickener A, 0-1% preservative B, and water makes up the balance to 100%.

[0010] In the continuous phase, by mass percentage, it includes the following raw materials: 15-25% aerogel dispersion paste B, 0-1% preservative C, 0-3% antifreeze B, 0-5% film-forming aid B, 55-70% continuous phase emulsion, 0-1% auxiliary B, 0-1% defoamer B, 0-1% thickener B, and water makes up the balance to 100%.

[0011] By adopting the above technical solution, adding the aerogel dispersion paste to the base paint and the continuous phase makes the finally obtained coating have a larger contact angle and higher hydrophobicity than the commercially available water-in-water multicolor coating. When water vapor and water droplets in the air come into contact with the surface of the paint film, they cannot hang on the surface of the paint film, let alone adhere to the pores of the paint film, and the water droplets will immediately slide off and leave the surface of the paint film. Thus, the water-in-water multicolor coating is given strong anti-condensation performance, and can effectively improve the whitening and softening phenomena of the paint film caused by water droplets on the surface.

[0012] Because the water-in-water multicolor coating contains colored pigments with a relatively large density, it is easy to sink in the system, resulting in unstable coating, obvious post-thickening, and showing the phenomena of softening and whitening of the coating.

[0013] Since the aerogel dispersion paste is a porous solid material with cavities, under the combined action of the aerogel dispersion paste, the base paint emulsion, and the color paste, the pigment particles in the color paste will be embedded into the cavities and pores of the aerogel dispersion paste, and then the base paint emulsion together with the aerogel dispersion paste and the color particles are wrapped, playing a good fixing role for the colored pigments. The colored pigments are not easy to settle in the system, effectively alleviating the post-thickening phenomenon, and thus improving the softening and whitening conditions of the coating.

[0014] Preferably, the dispersant can be one or a mixture of amine dispersants, phosphate dispersants, carboxylic acid dispersants, polybasic acid homopolymer dispersants, and polybasic acid copolymer dispersants.

[0015] Preferably, the defoamer A can be one or a mixture of mineral oil, white oil, silicone defoamer, and star polymer defoamer.

[0016] Preferably, the filler is one or a mixture of titanium dioxide, calcined kaolin, and montmorillonite.

[0017] Preferably, the filler is titanium dioxide and calcined kaolin, and the mass ratio of titanium dioxide to calcined kaolin is 1:(2-4), based on the mass of titanium dioxide.

[0018] Preferably, the auxiliary A is one or a mixture of more than one of AMP-95 and Advantex Vantex-T.

[0019] Preferably, the film-forming auxiliary A is one or a mixture of more than one of lauryl alcohol phthalate, cetyl alcohol phthalate, benzyl alcohol, ethylene glycol monobutyl ether, and ethylene glycol monobutyl ether acetate.

[0020] Preferably, the antifreeze A is one or a mixture of more than one of ethylene glycol, propylene glycol, and ethylene glycol monobutyl ether.

[0021] Preferably, the thickener A is one or a mixture of more than one of xanthan gum, gelatin, gum arabic, and carrageenan.

[0022] Preferably, the antifreeze B is one or a mixture of more than one of ethylene glycol, propylene glycol, and ethylene glycol monobutyl ether.

[0023] Preferably, the film-forming auxiliary B is one or a mixture of more than one of lauryl alcohol phthalate, cetyl alcohol phthalate, benzyl alcohol, ethylene glycol monobutyl ether, and ethylene glycol monobutyl ether acetate.

[0024] Preferably, the continuous-phase emulsion is one or a mixture of more than one of styrene-acrylic emulsion, pure acrylic emulsion, and silicone-acrylic emulsion.

[0025] Preferably, the auxiliary B is one or a mixture of more than one of AMP-95 and Advantex Vantex-T.

[0026] Preferably, the defoamer B can be one or a mixture of more than one of mineral oil, white oil, silicone defoamer, and star polymer defoamer.

[0027] Preferably, the thickener B is one or a mixture of more than one of inorganic thickener, non-associative thickener, and associative thickener.

[0028] Preferably, the cellulose is one or a mixture of more than one of hydroxyethyl cellulose, hydroxypropyl methyl cellulose, aloe fiber, pineapple leaf fiber, flax fiber, and straw fiber.

[0029] Preferably, the cellulose is aloe fiber and pineapple leaf fiber, and the mass ratio of aloe fiber to pineapple leaf fiber is 1:(0.8 - 1.2), based on the mass ratio of aloe fiber.

[0030] By adopting the above technical solutions, the types and proportions of cellulose are further defined. With the combined action of aloe fiber, pineapple leaf fiber and the aerogel dispersion paste, the system is given a more appropriate viscosity, enabling the aerogel dispersion paste carrying colored pigments to be evenly dispersed in the base paint system. The aerogel dispersion paste has better particle suspension, is more stable, the aerogel dispersion paste is not easy to shift, and the colored pigments in the aerogel dispersion paste are not easy to fall off. Thereby, the anti-condensation, anti-whitening, and anti-softening effects of the water-in-water multicolor paint are further improved.

[0031] Moreover, specially selected aloe vera fibers and pineapple leaf fibers can also have a good cooperative effect with the protective glue powder in the protective glue solution. A gelling reaction occurs between the protective glue powder and the aloe vera fibers and pineapple leaf fibers, which has a protective effect on the colored particles, thereby further improving the suspension stability of the colored particles.

[0032] Preferably, the cellulose is hydrophobically modified cellulose.

[0033] When the hydroxyl content of the cellulose is relatively high, it is easy to make the gelling reaction too strong, so that the particles formed by the granulated slices cannot unfold, affecting the distribution effect in the subsequent coating.

[0034] By adopting the above technical solution, hydrophobically modified cellulose is used as the cellulose to alleviate the reaction degree of the gelling reaction. Moreover, the hydrophobic groups of the hydrophobically modified cellulose can also react with the base paint emulsion and other components to form a denser and tougher three-dimensional structure, thereby improving the stability of the coating.

[0035] Preferably, the cellulose is hydrophobically modified cellulose and unmodified cellulose, and the mass ratio of the hydrophobically modified cellulose to the unmodified cellulose is (0.1 - 0.3):1, based on the mass of the unmodified cellulose.

[0036] By adopting the above technical solution, the cellulose is further defined as hydrophobically modified cellulose and unmodified cellulose, and the usage ratio between the two is strictly limited. A suitable viscosity and an appropriate gelling reaction can be maintained in the system, the particles can unfold, and a good dispersion effect is obtained.

[0037] Preferably, in the base paint, the mass percentage of the aerogel dispersion paste A is 20 - 25%, and the mass percentage of the base paint emulsion is 25 - 30%.

[0038] By adopting the above technical solution, the mass ratio between the aerogel dispersion paste A and the base paint emulsion is further defined. There is enough base paint emulsion to wrap the aerogel dispersion paste A, so that the aerogel dispersion paste A has a more uniform and stable distribution in the system.

[0039] Preferably, the base paint emulsion is one or a mixture of styrene-acrylic emulsion, pure acrylic emulsion, and silicone-acrylic emulsion.

[0040] By adopting the above technical solution, a specific base paint emulsion is further selected to provide a more suitable reaction system for various raw materials.

[0041] Preferably, the particle size of the color paste is 10 - 30 nm.

[0042] By adopting the above technical solution, the particle size of the color paste is further defined. The color paste with such a particle size can more easily enter the pores of the aerogel dispersion paste, and thus can be more firmly combined with the aerogel dispersion paste and the base paint emulsion.

[0043] In a second aspect, the present application provides a method for preparing a water-in-water multicolor paint for preventing condensation, adopting the following technical solution:

[0044] A method for preparing a water-in-water multicolor paint for preventing condensation includes the following steps:

[0045] Mix various raw materials in the base paint and stir until uniform to obtain the base paint;

[0046] Mix various raw materials in the protective colloid solution and stir until uniform to obtain the protective colloid solution;

[0047] Mix various raw materials in the continuous phase and stir until uniform to obtain the continuous phase;

[0048] Mix the base paint and the color paste to obtain a color-tuned base paint;

[0049] Mix the color-tuned base paint and the protective colloid solution until uniform, and perform shear granulation; then mix with the continuous phase and stir until uniform to obtain the finished product.

[0050] Preferably, when the cellulose is a hydrophobic modified cellulose, the following preparation steps are included:

[0051] Mix the cellulose and water, and stir under the condition of 1000 - 1500 r / min to obtain a suspension;

[0052] Prepare an aqueous solution of the silane coupling agent for later use;

[0053] Mix the suspension and the aqueous solution and stir until uniform; then perform ultrasonic treatment for 1 - 3 min under the condition of 500 - 600 W; perform freeze-drying to obtain the hydrophobic modified cellulose.

[0054] By adopting the above technical solution, the cellulose is hydrophobically modified, so that the surface of the cellulose is loaded with corresponding amounts and types of hydrophobic groups, and subsequent cooperation with raw materials such as the protective colloid powder has a better effect.

[0055] In summary, the present application has the following beneficial effects:

[0056] 1. In this application, by adding an aerogel dispersion paste to the base paint and the continuous phase, the resulting coating has a larger contact angle and higher hydrophobicity. When water vapor and water droplets in the air come into contact with the surface of the paint film, they cannot hang on the surface of the paint film or adhere to the pores of the paint film, and the water droplets will immediately slide off and leave the surface of the paint film. This gives the water-in-water multicolor coating strong anti-condensation performance and effectively improves the whitening and softening phenomena of the paint film caused by water droplets on the surface.

[0057] 2. With the combined cooperation of the aerogel dispersion paste, the base paint emulsion, and the color paste, the pigment particles in the color paste will be embedded into the cavities and pores of the aerogel dispersion paste, and the base paint emulsion will wrap together with the aerogel dispersion paste and the color particles, playing a good fixing role for the colored pigments. The colored pigments are not easily settled in the system, effectively alleviating the post-thickening phenomenon, thereby improving the softening and whitening conditions of the coating.

[0058] 3. With the combined cooperation of aloe fiber, pineapple leaf fiber, and the aerogel dispersion paste, the system is given a more appropriate viscosity, enabling the aerogel dispersion paste to be evenly dispersed in the base paint system, having better particle suspension, being more stable, the aerogel dispersion paste is not easily displaced, and the colored pigments in the aerogel dispersion paste are not easily shed. Specific Embodiments

[0059] The following further elaborates on this application in conjunction with examples.

[0060] The raw materials used in the following examples and comparative examples are all commercially available products.

[0061] Aerogel dispersion paste A and aerogel dispersion paste B are essentially the same raw materials, and A and B are only used for distinction. The aerogel dispersion paste is a silica aerogel dispersion paste, with a nano-level pore diameter, a porosity of 95%, and a density of 0.03 g / cm 3 , purchased from Anhui Keang Nano Technology Co., Ltd.

[0062] Examples

[0063] Example 1

[0064] An anti-condensation water-in-water multicolor coating, including a protective colloid solution, a color-matching base paint, and a continuous phase. The mass ratio of the color-matching base paint, the protective colloid solution, and the continuous phase is 4:3:3.

[0065] The color-matching base paint includes a color paste and a base paint. The color paste is 0.6 kg, and the base paint is 99.4 kg; the particle size of the color paste is 20 nm.

[0066] The color paste includes 0.2 kg of iron red color paste, 0.2 kg of iron yellow color paste, and 0.2 kg of carbon black color paste.

[0067] Among them, the base paint includes the following raw materials by mass percentage: 0.3% dispersant, 25% aerogel dispersion paste A, 0.3% defoamer A, 12% filler, 0.8% cellulose, 0.1% additive A, 0.3% preservative A, 28% base paint emulsion, 1.4% film-forming aid A, 1% antifreeze A, 7% protective colloid diluent, 23.8% water. Specifically summarized in Table 1-1.

[0068] The dispersant is sodium hexametaphosphate, defoamer A is mineral oil, the additive is AMP-95, the base paint emulsion is styrene-acrylic emulsion, film-forming aid A is 2-ethylhexyl acetate, and antifreeze A is ethylene glycol.

[0069] The filler is titanium dioxide and calcined kaolin, and the mass ratio of titanium dioxide to calcined kaolin is 1:2.

[0070] The cellulose is aloe fiber and pineapple leaf fiber, and the mass ratio of aloe fiber to pineapple leaf fiber is 1:1.

[0071] The protective colloid diluent is prepared by mixing protective colloid powder and water in a mass ratio of 1:9. For distinction, the protective colloid powder of the protective colloid diluent is protective colloid powder A, and protective colloid powder A is lithium magnesium silicate.

[0072] The protective colloid solution includes the following raw materials by mass percentage: 7% protective colloid powder, 0.3% thickener A, 0.2% preservative B, 92.5% water. Specifically summarized in Table 1-2.

[0073] The protective colloid powder here is protective colloid powder B, and protective colloid powder B is lithium magnesium silicate; thickener A is xanthan gum.

[0074] The continuous phase includes the following raw materials by mass percentage: 20% aerogel dispersion paste B, 0.3% preservative C, 2% antifreeze B, 3% film-forming aid B, 60% continuous phase emulsion, 0.2% additive B, 0.4% defoamer B, 0.6% thickener B, 13.5% water. Specifically summarized in Table 1-3.

[0075] Antifreeze B is ethylene glycol, and film-forming aid B is 2-ethylhexyl acetate. The continuous phase emulsion is styrene-acrylic emulsion, additive B is AMP-95, and defoamer B is mineral oil.

[0076] Thickener B is an associative thickener, and the type is HASE.

[0077] This application also provides a preparation method of an anti-condensation water-in-water multicolor paint, including the following steps:

[0078] Step 1): Mix various raw materials in the base paint and stir until uniform to obtain the base paint.

[0079] Step 2): Mix various raw materials in the protective colloid solution and stir until uniform to obtain the protective colloid solution.

[0080] Step 3): Mix various raw materials in the continuous phase and stir until uniform to obtain the continuous phase.

[0081] Step 4): Mix the base paint and the color paste to obtain the color-tuned base paint.

[0082] Step 5): Add the protective colloid solution to the dispersion tank, then add the color-tuned base paint, start the stirrer and stir until uniform. Then carry out shear granulation, and stop the machine after reaching the required color particle size.

[0083] Step 6): Add the color particles obtained in Step 5) and the continuous phase to the special multi-color blending equipment and stir until uniform. After passing the inspection, the finished product is obtained.

[0084] Example 2

[0085] A water-in-water multi-color coating for preventing condensation, which is different from Example 1 in that

[0086] The particle size of the color paste is 10 nm.

[0087] The proportions of various raw materials in the base paint are different. For details, see Table 1-1.

[0088] The dispersant is an ammonium-based dispersant, and the specific model is OrotanTM 1124.

[0089] The defoamer A is white oil, the auxiliary agent A is Advantex Vantex-T, the base paint emulsion is a pure acrylic emulsion, the film-forming auxiliary agent A is 2-ethylhexyl 2,2,4-trimethylpentanoate, and the antifreeze agent A is propylene glycol.

[0090] The filler is titanium dioxide and calcined kaolin, and the mass ratio of titanium dioxide to calcined kaolin is 1:3.

[0091] The cellulose is aloe fiber and pineapple leaf fiber, and the mass ratio of aloe fiber to pineapple leaf fiber is 1:0.8.

[0092] The proportions of various raw materials in the protective colloid solution are different. For details, see Table 1-2.

[0093] The proportions of various raw materials in the continuous phase are different. For details, see Table 1-3.

[0094] The antifreeze agent B is propylene glycol, and the film-forming auxiliary agent B is 2-ethylhexyl 2,2,4-trimethylpentanoate. The continuous phase emulsion is a pure acrylic emulsion, the auxiliary agent B is Advantex Vantex-T, and the defoamer B is white oil.

[0095] The thickener B is an inorganic thickener, specifically bentonite.

[0096] Example 3

[0097] A water-in-water multi-color coating for preventing condensation, which is different from Example 1 in that

[0098] The particle size of the color paste is 30 nm.

[0099] The proportions of various raw materials in the base paint are different. For details, see Table 1-1.

[0100] The dispersant is OrotanTM 731A.

[0101] The defoamer A is a silicone defoamer, the auxiliary A is AMP-95, the base paint emulsion is a silicon-acrylic emulsion, the film-forming auxiliary A is benzyl alcohol, and the antifreeze A is ethylene glycol monobutyl ether.

[0102] The fillers are titanium dioxide and calcined kaolin, and the mass ratio of titanium dioxide to calcined kaolin is 1:4.

[0103] The cellulose is aloe fiber and pineapple leaf fiber, and the mass ratio of aloe fiber to pineapple leaf fiber is 1:1.2. The aloe fiber and pineapple leaf fiber are commercially available and have not been treated with hydrophobic modification.

[0104] The proportions of various raw materials in the protective colloid solution are different. For details, see Table 1-2.

[0105] The proportions of various raw materials in the continuous phase are different. For details, see Table 1-3.

[0106] The antifreeze B is ethylene glycol monobutyl ether, and the film-forming auxiliary B is benzyl alcohol. The continuous phase emulsion is a silicon-acrylic emulsion, the auxiliary B is Advantex Vantex-T, and the defoamer B is white oil.

[0107] The thickener B is an associative thickener, and the type is HEUR.

[0108] Table 1-1

[0109]

[0110]

[0111] Table 1-2

[0112]

[0113] Table 1-3

[0114]

[0115] Example 4

[0116] A water-in-water multicolor paint for preventing condensation, which is different from Example 1 in that the cellulose is aloe fiber and pineapple leaf fiber, and the mass ratio of aloe fiber to pineapple leaf fiber is 1:0.1. That is, the mass percentage of aloe fiber in the base paint is 0.73%, and the mass percentage of pineapple leaf fiber in the base paint is 0.07%.

[0117] Example 5

[0118] A water-in-water multicolor paint resistant to condensation, which is different from Example 1 in that the cellulose is aloe fiber, that is, the mass percentage of aloe fiber in the base paint is 0.8%, and the mass percentage of pineapple leaf fiber in the base paint is 0.

[0119] Example 6

[0120] A water-in-water multicolor paint resistant to condensation, which is different from Example 1 in that the cellulose is hydroxyethyl cellulose, that is, the mass percentage of hydroxyethyl cellulose in the base paint is 0.8%.

[0121] Example 7

[0122] A water-in-water multicolor paint resistant to condensation, which is different from Example 1 in that the cellulose is hydrophobically modified cellulose, that is, commercially available aloe fiber and pineapple leaf fiber are subjected to hydrophobic modification treatment.

[0123] The preparation of the hydrophobically modified cellulose comprises the following steps:

[0124] Step 01): Mix cellulose (aloe fiber, pineapple leaf fiber) and water at a mass ratio of 1:5, and stir for 5 min under the condition of 1500 r / min to obtain a suspension.

[0125] Step 02): Prepare an aqueous solution of silane coupling agent (kh-570) with a concentration of 2% wt for standby.

[0126] Step 03): Mix the suspension and the aqueous solution and stir until uniform.

[0127] Then, perform ultrasonic treatment for 1 min under the condition of 600 W.

[0128] Step 04): Lyophilize the material in Step 03) for 48 h to obtain hydrophobically modified cellulose.

[0129] Example 8

[0130] A water-in-water multicolor paint resistant to condensation, which is different from Example 1 in that the cellulose is hydrophobically modified cellulose and unmodified cellulose, and the mass ratio of hydrophobically modified cellulose to unmodified cellulose is 0.1:1. That is, part of the commercially available aloe fiber and pineapple leaf fiber are subjected to hydrophobic modification treatment. The mass percentage of hydrophobically modified cellulose in the base paint is 0.07%, and the mass percentage of unmodified cellulose in the base paint is 0.73%.

[0131] The preparation of the hydrophobically modified cellulose comprises the following steps:

[0132] Step 01): Mix cellulose (aloe vera fiber, pineapple leaf fiber) and water at a mass ratio of 1:5, and stir for 5 min under the condition of 1500 r / min to obtain a suspension.

[0133] Step 02): Prepare an aqueous solution of silane coupling agent (kh-570) with a concentration of 2% wt for standby.

[0134] Step 03): Mix the suspension and the aqueous solution, and stir until homogeneous.

[0135] Then, perform ultrasonic treatment for 1 min under the condition of 600 W.

[0136] Step 04): Lyophilize the material in Step 03) for 48 h to obtain hydrophobically modified cellulose.

[0137] Example 9

[0138] A water-in-water multicolor paint for preventing condensation, which is different from Example 1 in that the cellulose is hydrophobically modified cellulose and unmodified cellulose, and the mass ratio of hydrophobically modified cellulose to unmodified cellulose is 0.3:1. That is, hydrophobic modification treatment is performed on some commercially available aloe vera fibers and pineapple leaf fibers. The mass percentage of hydrophobically modified cellulose in the base paint is 0.18%, and the mass percentage of unmodified cellulose in the base paint is 0.62%.

[0139] The preparation of hydrophobically modified cellulose includes the following steps:

[0140] Step 01): Mix cellulose (aloe vera fiber, pineapple leaf fiber) and water at a mass ratio of 1:5, and stir for 5 min under the condition of 1000 r / min to obtain a suspension.

[0141] Step 02): Prepare an aqueous solution of silane coupling agent (kh-570) with a concentration of 2% wt for standby.

[0142] Step 03): Mix the suspension and the aqueous solution, and stir until homogeneous.

[0143] Then, perform ultrasonic treatment for 3 min under the condition of 500 W.

[0144] Step 04): Lyophilize the material in Step 03) for 48 h to obtain hydrophobically modified cellulose.

[0145] Example 10

[0146] A water-in-water multicolor paint for preventing condensation, which is different from Example 7 in that the cellulose is hydrophobically modified cellulose, and the cellulose is specifically hydroxyethyl cellulose. That is, hydrophobic modification treatment is performed on commercially available hydroxyethyl cellulose.

[0147] Example 11

[0148] A water-in-water multicolor paint with anti-condensation property, which is different from that of Example 1 in that the base paint emulsion is an acrylic emulsion and is purchased from Shandong Mingyue Chemical Co., Ltd.

[0149] Example 12

[0150] A water-in-water multicolor paint with anti-condensation property, which is different from that of Example 1 in that the particle size of the color paste is 100 nm.

[0151] Comparative example

[0152] Comparative example 1

[0153] A water-in-water multicolor paint with anti-condensation property, which is different from that of Example 1 in that the aerogel dispersion paste A / B in the base paint and the continuous phase is replaced with water. That is, the aerogel dispersion paste is 0 kg, the mass percentage of water in the base paint is 48.8%, and the mass percentage of water in the continuous phase is 33.5%.

[0154] Performance detection test

[0155] 1. Detection objects: The water-in-water multicolor paints of Examples 1-12 and Comparative Example 1.

[0156] 2. Detection items:

[0157] 1) Test the performance of the paint according to HG / T 4343-2012 "Water-based multicolor architectural paint".

[0158] 2) According to HG / T 4560-2013 "Test method for anti-condensation performance of paints", after the test ends, observe the condensation situation on the surface of the sample with the naked eye and score it. The full score is 5 points. The more serious the condensation, the lower the score.

[0159] 3) Water resistance and whiteness detection: Use a 25-μm applicator to scrape the detection object on a glass plate and dry it in an oven at 55 °C for 2 h. After taking it out, soak it in water for 2 h, examine the water resistance and whiteness, and evaluate the grade. The full grade is 5 levels, level 1 is the worst, level 3 is qualified, and level 5 is the best.

[0160] 4) Hardness detection: Test the hardness of the detection sample according to GB / T 6739-2022 "Determination of film hardness by pencil method for paints and varnishes".

[0161] 5) Storage performance detection: Put the detection sample into a sealed container, place the sealed container in an environment with a temperature of 45 °C and a humidity of 80% for 30 d, and then conduct water resistance and whiteness and hardness detections again after taking it out.

[0162] The detection results of the above 1)-5) experiments are shown in Table 2.

[0163] Table 2-1

[0164]

[0165] Table 2-2

[0166]

[0167] Table 2-3

[0168]

[0169]

[0170] According to the comparison of the test data of Example 1 and Comparative Example 1 in Table 2, it can be seen that after not using the aerogel dispersion paste, it cannot be combined with other raw materials, resulting in poor anti-condensation, scrub resistance, water whitening resistance, hardness, and storage performance of the coating.

[0171] According to the comparison of the test data of Example 1 and Examples 4-6 in Table 2, it can be seen that the coatings prepared by rashly changing the type and / or proportion of cellulose have relatively obvious fluctuations in the performance of thermal storage stability, storage stability, and scrub resistance. It shows that it is necessary to limit the type and proportion of cellulose to achieve a special combination with raw materials such as aerogel dispersion paste.

[0172] According to the comparison of the test data of Example 1 and Examples 7-10 in Table 2, hydrophobic modification of cellulose can effectively improve the performance of the coating. Among them, if the usage ratio of modified and unmodified cellulose and the type of cellulose used for modification can be further limited, the aerogel dispersion paste and color pigments have better particle suspension, making the coating have a denser structure, thereby showing better scrub resistance, storage, hardness, and water whitening resistance.

[0173] According to the comparison of the test data of Example 1 and Example 11 in Table 2, further limiting a specific base paint emulsion can provide a better reaction system for particles such as aerogel dispersion paste and color pigments, thereby further improving the effects of anti-condensation and water whitening resistance.

[0174] According to the comparison of the test data of Example 1 and Example 12 in Table 2, limiting the pigment paste particle size within a specific range can better cooperate with the aerogel dispersion paste, improve particle stability, and thus it is not easy to turn white, become soft, or thicken later.

[0175] This specific embodiment is only an explanation of the present application and does not limit the present application. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A water-in-water multicolor paint for preventing condensation, characterized in that, It includes a protective glue solution, a color-toned base paint, and a continuous phase. The mass ratio of the color-toned base paint, the protective glue solution, and the continuous phase is (3 - 5):(2 - 4):(2 - 4); The color-toned base paint includes a color paste and a base paint. By mass percentage, the color paste accounts for 0.1 - 1% of the color-toned base paint, and the base paint makes up the balance to 100%; In the base paint, by mass percentage, it includes the following raw materials: 0.1 - 1% dispersant, 15 - 30% aerogel dispersion paste A, 0 - 1% defoamer A, 5 - 20% filler, 0.1 - 2% cellulose, 0 - 1% auxiliary agent A, 0 - 1% preservative A, 18 - 30% base paint emulsion, 0 - 1.5% film-forming auxiliary agent A, 0 - 1.5% antifreeze A, 5 - 10% protective glue diluent, and water makes up the balance to 100%; The cellulose is aloe fiber and pineapple leaf fiber, and the mass ratio of aloe fiber to pineapple leaf fiber is 1:(0.8 - 1.2), based on the mass ratio of aloe fiber; In the protective glue solution, by mass percentage, it includes the following raw materials: 5 - 10% protective glue powder, 0 - 1% thickener A, 0 - 1% preservative B, and water makes up the balance to 100%; In the continuous phase, by mass percentage, it includes the following raw materials: 15 - 25% aerogel dispersion paste B, 0 - 1% preservative C, 0 - 3% antifreeze B, 0 - 5% film-forming auxiliary agent B, 55 - 70% continuous phase emulsion, 0 - 1% auxiliary agent B, 0 - 1% defoamer B, 0 - 1% thickener B, and water makes up the balance to 100%; Aerogel dispersion paste A and aerogel dispersion paste B are essentially the same raw materials, and A and B are only used for distinction; Among them, the aerogel dispersion paste is a silica aerogel dispersion paste, with a nano-level pore size, a porosity of 95%, and a density of 0.03 g / cm3; Defoamer A and defoamer B are one or a mixture of more of mineral oil, white oil, silicone defoamer, and star polymer defoamer; Auxiliary agent A and auxiliary agent B are one or a mixture of more of AMP - 95 and Advantex Vantex - T; Film-forming auxiliary agent A and film-forming auxiliary agent B are one or a mixture of more of alcohol ester twelve, alcohol ester sixteen, benzyl alcohol, ethylene glycol monobutyl ether, and ethylene glycol monobutyl ether acetate; Antifreeze A and antifreeze B are one or a mixture of more of ethylene glycol, propylene glycol, and ethylene glycol monobutyl ether; Thickener A is one or a mixture of more of xanthan gum, gelatin, gum arabic, and carrageenan, and thickener B is one or a mixture of more of inorganic thickener, non - associative thickener, and associative thickener.

2. The anti-condensation water-in-water colorful coating according to claim 1, characterized in that: The cellulose is hydrophobically modified cellulose.

3. The anti-condensation water-in-water colorful coating according to claim 1, characterized in that: The cellulose is hydrophobically modified cellulose and unmodified cellulose, and the mass ratio of hydrophobically modified cellulose to unmodified cellulose is (0.1 - 0.3):1, based on the mass of unmodified cellulose.

4. The anti-condensation water-in-water colorful coating according to claim 1, characterized in that: In the base paint, the mass percentage of aerogel dispersion paste A is 20 - 25%, and the mass percentage of the base paint emulsion is 25 - 30%.

5. The anti-condensation water-in-water colorful coating according to claim 1, characterized in that: The base paint emulsion is one or a mixture of more of styrene - acrylic emulsion, pure acrylic emulsion, and silicone - acrylic emulsion.

6. The anti-condensation water-in-water colorful coating according to claim 1, characterized in that: The particle size of the color paste is 10 - 30 nm.

7. A method for preparing the anti-condensation water-in-water multicolor paint according to any one of claims 1-6, characterized in that, It includes the following steps: Mix various raw materials in the base paint and stir until homogeneous to obtain the base paint; Mix various raw materials in the protective colloid solution and stir until homogeneous to obtain the protective colloid solution; Mix various raw materials in the continuous phase and stir until homogeneous to obtain the continuous phase; Mix the base paint with the color paste to obtain the color-tuned base paint; Mix the color-tuned base paint with the protective colloid solution until homogeneous, and perform shear granulation; then mix with the continuous phase and stir until homogeneous to obtain the finished product.

8. The preparation method of the anti-condensation water-in-water colorful coating according to claim 7, characterized in that: When the cellulose is hydrophobic modified cellulose, it includes the following preparation steps: Mix cellulose with water and stir under the condition of 1000 - 1500 r / min to obtain a suspension; Prepare an aqueous solution of the silane coupling agent and set it aside; Mix the suspension with the aqueous solution and stir until homogeneous; then perform ultrasonic treatment for 1 - 3 min under the condition of 500 - 600 W; Perform freeze-drying to obtain the hydrophobic modified cellulose.

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