An aqueous reactive scrapeable water-in-sand multicolor coating and its preparation, construction methods and applications

Abstract

The water-based reactive scrapeable water-in-sand multicolor coating of the present invention, its preparation, construction method and application belong to the field of multicolor coatings; the multicolor coating of the present invention includes colored multicolor paint particles and a continuous phase emulsion, and the colored multicolor paint particles include colored multicolor paint and a cut-off liquid; the colored multicolor paint includes a sodium alginate solution, a protective colloid solution, and a colored multicolor paint base material; the cut-off liquid includes a protective colloid solution; the continuous phase emulsion includes a calcium ion solution, an acrylic emulsion and an auxiliary agent. The multicolor coating of the present invention is prepared by a two-step process, and the two-step process has successfully improved the defects such as color bleeding of colored dot particles, uncontrollable size and state of colored dots, and many broken dots after granulation caused by directly reacting calcium ions with alginate in the traditional granulation process; at the same time, the two-step process has also successfully improved the defects such as easy fragmentation of soft colored dots in the traditional multicolor coating during the scraping stage, ensuring that the board surface effect has clear and distinct water-based multicolor patterns and textures.

Description

Technical Field

[0001] The present invention belongs to the field of water-in-sand multicolor coatings, and particularly relates to an aqueous reactive scrapeable water-in-sand multicolor coating, a preparation method, a construction method and an application thereof. Background Art

[0002] Existing water-in-sand multicolor coatings adopt a modified hydroxyethyl cellulose (HEC) / protective colloid system, which are soft color dots with poor color dot strength and cannot be scraped for construction, and can only be constructed by spraying; however, spraying is affected by construction level and environmental factors, resulting in unstable panel effects and restricting the application of water-in-sand multicolor coatings.

[0003] In order to improve the strength of color dots in existing water-in-sand multicolor coatings, some researchers add polyvinyl alcohol to the raw materials of the coatings to improve the strength of color dots. However, polyvinyl alcohol belongs to the third category of carcinogens in the carcinogen list published by the International Agency for Research on Cancer of the World Health Organization on October 27, 2017, and has an inestimable impact on the human body. Therefore, it is urgent to develop a water-in-sand multicolor coating that does not use polyvinyl alcohol as a raw material, has high color dot strength, and can be scraped for construction. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an aqueous reactive scrapeable water-in-sand multicolor coating, a preparation method, a construction method and an application thereof. For the aqueous reactive scrapeable water-in-sand multicolor coating of the present invention, first, through the preparation method of traditional water-in-sand coatings, colored multicolor paint particles are prepared using a protective colloid, and then the sodium alginate in the colored multicolor paint particles reacts with calcium ions in the continuous phase, improving the strength of color dots, enabling it to be constructed by scraping, effectively ensuring the panel effect during construction, and broadening the application range of water-in-sand multicolor coatings. The preparation method of the aqueous reactive scrapeable water-in-sand multicolor coating of the present invention has a simple process, is easy to operate, improves the situation that color dots in the existing soft color dot scheme of water-in-sand are easy to break, easy to bleed, and cannot be scraped, and can be applied to large-scale industrial production.

[0005] To solve the above problems, the present invention is achieved through the following technical solutions:

[0006] The first object of the present invention is:

[0007] To provide an aqueous reactive scrapeable water-in-sand multicolor coating, which comprises the following components in parts by mass:

[0008] 600 - 800 parts of colored multicolor paint particles and 200 - 500 parts of continuous phase emulsion;

[0009] The colored multicolor paint particles include: 450 - 500 parts of colored multicolor paint and 200 - 300 parts of cut-off liquid;

[0010] The described cutting point liquid includes: 100 - 150 parts of protective glue solution and 100 - 150 parts of water;

[0011] The mass percentage concentration of the described protective glue solution is 5 - 10%;

[0012] The solute of the described protective glue solution is magnesium aluminum silicate;

[0013] The described colorful multicolor paint includes: 50 - 150 parts of 3.5% sodium alginate solution, 40 - 90 parts of protective glue solution, and 300 - 500 parts of colorful multicolor paint base material;

[0014] The mass percentage concentration of the described protective glue solution is 5 - 10%;

[0015] The solute of the described protective glue solution is magnesium aluminum silicate;

[0016] The described sodium alginate solution includes the following components in parts by mass:

[0017] 3 - 4 parts of sodium alginate and 85 - 115 parts of water;

[0018] The described sodium alginate is an alginate with a high G - segment content and high gelation strength;

[0019] The described colorful multicolor paint base material includes: 35 - 40 parts of pigment - filler, 10 - 15 parts of additives, 100 - 200 parts of acrylic emulsion, 2 - 3 parts of hydroxyethyl cellulose, 2 - 3 parts of hydrophobically modified associative cellulose, and 100 - 300 parts of water;

[0020] Among them, the described hydrophobically modified associative cellulose can better adjust the viscosity of the colorful multicolor paint base material and ensure the dispersion stability of each raw material in the base material;

[0021] The described continuous - phase emulsion includes 50 - 100 parts of calcium - ion - containing solution, 150 - 400 parts of acrylic emulsion, and 0 - 2 parts of additives.

[0022] Mix the calcium - ion - containing solution, acrylic emulsion, and additives proportionally and uniformly to obtain the continuous - phase emulsion.

[0023] A further optimization of the water - borne reactive scrape - able water - in - sand multicolor coating of the present invention is:

[0024] The described pigment - filler is 35 - 40 parts; the pigment - filler includes titanium dioxide and white sand, among which titanium dioxide is 1 - 6 parts and white sand is 34 - 39 parts;

[0025] Adding pigment - filler and additives can, while reducing the cost of the colorful multicolor paint base material, improve the stability of the base material.

[0026] A further optimization of the water - borne reactive scrape - able water - in - sand multicolor coating of the present invention is:

[0027] The additives in the described colorful paint base material include one or a combination of several of thickeners, wetting and dispersing agents, fungicides, defoamers, pH regulators, antifreeze agents, and film-forming agents;

[0028] Specifically, it is 2-3 parts of wetting and dispersing agent, 0.5-0.6 parts of strong fungicide, 0.5-0.6 parts of long-acting fungicide, 0.5-0.6 parts of defoamer, 2-3 parts of hydroxyethyl cellulose, 2-3 parts of hydrophobically modified associative cellulose, 0.5-0.6 parts of pH regulator, 1-3 parts of antifreeze agent, and 1-2 parts of film-forming agent.

[0029] The additives in the continuous phase emulsion include: one or a combination of several of fungicides, pH regulators, film-forming agents, antifreeze agents, and thickeners;

[0030] Among them, the described fungicide is preferably 0.1-2 parts, more preferably 0.1-0.5 parts, and the performance of the continuous phase is improved by adding the additives;

[0031] The fungicide in the continuous phase emulsion includes 0.1-0.4 parts of strong fungicide and 0.1-0.4 parts of long-acting fungicide to enhance the antibacterial effect of the continuous phase emulsion.

[0032] The further optimization of the water-based reactive scratchable water-in-sand multicolor coating of the present invention is:

[0033] The protective colloid solution in the described colorful paint and the cut-off liquid is a specially modified synthetic flaky magnesium aluminum silicate, which is a synthetic flaky magnesium aluminum silicate modified by pyrophosphate groups, and the protective colloid solutions used for both are the same;

[0034] The specially modified synthetic flaky magnesium aluminum silicate is preferably the product with the model S482 of Huate Chemical Company.

[0035] Using the specially modified synthetic flaky magnesium aluminum silicate can ensure that the color dots have good granulation cut resistance, anti-color bleeding performance, and anti-swelling function.

[0036] The further optimization of the water-based reactive scratchable water-in-sand multicolor coating of the present invention is:

[0037] The calcium ion solution in the continuous phase emulsion is calcium chloride solution; preferably anhydrous calcium chloride. The calcium ions in the calcium chloride solution will react with sodium alginate in the color dots to form a tough and dense layer on the surface of the color dots, greatly improving the toughness of the color dots and being sufficient to support the shear strength in the case of scratching.

[0038] The calcium ion solution in the continuous phase emulsion is preferably 5% concentration of calcium chloride solution; that is, the calcium chloride solution needs to be dispersed in water at 5% concentration for use first.

[0039] All of the water mentioned above is selected from one of deionized water, purified water or ultrapure water, preferably deionized water.

[0040] The second object of the present invention is:

[0041] To provide a preparation method of the waterborne reactive scrapeable water-in-sand multicolor coating described above, which comprises the following preparation steps:

[0042] Slowly add the continuous phase emulsion to the colored multicolor paint particles under stirring in proportion and mix evenly to obtain the waterborne reactive scrapeable water-in-sand multicolor coating;

[0043] The colored multicolor paint particles mentioned above comprise the following preparation steps:

[0044] Stir and granulate the colored multicolor paint in the cut-off liquid.

[0045] The colored multicolor paint mentioned above comprises the following preparation steps:

[0046] Mix the prepared colored multicolor paint base material and sodium alginate solution evenly in proportion, and then add the protective colloid solution and mix evenly to obtain the colored multicolor paint;

[0047] The colored multicolor paint base material mentioned above comprises the following preparation steps:

[0048] First, add water to the container in proportion, then add pigments and fillers, hydroxyethyl cellulose, hydrophobically modified associative cellulose, additives and mix evenly, and then add acrylic emulsion and mix evenly to obtain the colored multicolor paint base material.

[0049] The waterborne reactive scrapeable water-in-sand multicolor coating of the present invention is essentially prepared by a two-step process. In the first step, the cellulose ether and protective colloid in the colored multicolor paint base material react to quickly form the colored dots in the dispersed phase and form soft colored dots. In the second step, the sodium alginate in the soft colored dots formed in the first step reacts with the calcium ion solution in the continuous phase to form a cross-linked layer on the surface of the soft colored dots, improving the toughness of the colored dot particles, enabling the colored dots to withstand scraping construction and the colored dots not to break, so that the multicolor coating of the present invention can be constructed by scraping. The two-step process of the present invention has successfully improved the defects such as color bleeding of colored dot particles, uncontrollable size and state of colored dots, and many broken dots after granulation in the granulation stage caused by directly reacting calcium ions with alginate in the traditional granulation process; at the same time, the two-step process of the present invention has also successfully improved the defects such as easy breakage of colored dot particles in the scraping stage of traditional multicolor coatings, ensuring that the board surface effect has clear and distinct waterborne multicolor patterns and textures.

[0050] The third object of the present invention is:

[0051] Provided is a construction method of the waterborne reactive scrapeable water-in-sand multicolor coating described above, which is constructed by scraping or spraying.

[0052] The waterborne reactive scrapeable water-in-sand multicolor coating of the present invention can be scraped on a flat or rough substrate, and the colored dots can all maintain integrity.

[0053] The waterborne reactive scrapeable water-in-sand multicolor coating of the present invention can also be sprayed using a multicolor spray gun.

[0054] The fourth object of the present invention is:

[0055] Provided is an application of the waterborne reactive scrapeable water-in-sand multicolor coating described above in interior or exterior wall decorative coatings.

[0056] The waterborne reactive scrapeable water-in-sand multicolor coating of the present invention can be constructed by spraying or scraping, with simpler operation and smoother construction. It can be applied not only to exterior wall decoration but also to interior wall decoration, significantly expanding the application scope of the water-in-sand multicolor coating and having broad application prospects.

[0057] In the present invention, the sodium alginate described can be commercially available, for example, it can be purchased from Jiangsu Rongchuang Bioengineering Co., Ltd., Qingdao Haiweisen Biotechnology Co., Ltd., etc.

[0058] In the present invention, the sodium alginate used is a copolymer with a linear connection. In the sodium alginate macromolecule, the monomers exist in a block form, and the two blocks can be called the M block (poly-mannuronic acid) or the G block (poly-guluronic acid). When the G block content is high in sodium alginate, a high gel strength will be obtained; sodium alginate with a high M block content has medium gel strength and strong anti-syneresis effect; to address the weather resistance problem of the multicolor coating, we choose sodium alginate with a high G block content and high gel strength.

[0059] Alginates can crosslink with most polyvalent cations. As the concentration of polyvalent cations gradually increases, the alginate solution can become thickened, then form a gel, and finally lead to precipitation. Therefore, in the present invention, divalent calcium ions are selected as reactants and added to the continuous phase. When calcium ions contact sodium alginate, they replace sodium ions to become calcium alginate gel, which coats the surface of the colored dots, thereby improving the strength of the colored dots, slowing down the damage of calcium ions to the protective colloid, being easy to process and mix, enabling the reactive scrapeable water-in-sand multicolor coating provided by the present invention to be constructed by scraping, effectively ensuring the panel effect, and broadening the application of the water-in-sand coating.

[0060] The present invention uses specially modified synthetic flaky magnesium aluminum silicate to provide divalent salts. The solute itself is a nano-sized flake structure, which is a layered silicate mineral containing lithium, magnesium, and sodium elements synthesized artificially. The crystal structure unit is a tiny flake in nanometer units. The flake surface is negatively charged, and the end face is positively charged. After hydration separation, the end face of the flake is attracted to the surface of another flake, thus quickly forming a three-dimensional colloidal structure, namely the Car House structure, endowing the system with high thixotropy and three-dimensional sense.

[0061] In the present invention, the protective colloid solution is added to the colored multicolor paint base material in a certain proportion. The cellulose ethers in the colored multicolor paint base material, including hydroxyethyl cellulose and hydrophobically modified associative cellulose, will have a swelling and thickening effect during the production of the base material, and the cellulose molecular chains will be evenly dispersed in the base material. Subsequently, an appropriate amount of the protective colloid solution is added to the base material and fully mixed. The hydroxyl groups at the ends of the cellulose ether molecular chains form hydrogen bonds with the hydrogen ions on the end face layer of the protective colloid particles in the added protective colloid solution to undergo a cross-linking reaction, forming a "framework structure" in the color dot system, making the base material initially gel. Subsequently, in the granulation stage, the initially gelled base material is added to the granulation liquid. The granulation process will cause the initially gelled base material to further react with the protective colloid solution in the granulation liquid, further gelling the surface of the base material particles, firmly fixing the color-matched base paint in the "framework", and forming stable rubber particles. Detailed implementation manners

[0062] In order to make the application, technical solutions and advantages of the present invention clearer and more understandable, the content of the present invention will be described in detail in combination with specific embodiments. It should be understood that the embodiments are only used to illustrate the present invention, rather than limiting the protection scope of the present invention. Any simple improvement to the preparation method of the present invention under the premise of the inventive concept of the present invention belongs to the protection scope of the present invention.

[0063] The names and purchasing manufacturers of the raw material substances used in the embodiments are as follows. Substances without special instructions can be obtained through commercial purchase.

[0064] Anhydrous calcium chloride is selected from Shanghai Lingfeng Chemical Reagent Co., Ltd.; the strong bactericide is selected from AA 091VLF; the long-acting bactericide is selected from ROCIMA(TM)BT NV2; the wetting dispersant is selected from SN-DISPERSANT 5027; the pH regulator is selected from the multifunctional auxiliary agent AMP-95 of Dow Chemical Company; the defoamer is selected from FOAMASTER MO NXZ AG; the film-forming agent is selected from dodecyl alcohol ester; the antifreeze is commercially available propylene glycol; the hydrophobically modified associative cellulose is selected from HE-10K of Ashland; the hydroxyethyl cellulose is selected from 250HBR of Ashland; the acrylic emulsion is selected from the modified real stone paint emulsion BLJ-838A-2 of Baolijia Co., Ltd.; the acrylic emulsion is selected from RS3799H of Badfu; the protective colloid is selected from S-482 of Zhejiang Huate New Materials Co., Ltd.

[0065] Example 1

[0066] A waterborne reactive scrapeable water-in-sand multicolor coating, which comprises the following preparation steps:

[0067] Slowly add the continuous phase emulsion in proportion to the colored multicolor paint particles under stirring and mix evenly to obtain the waterborne reactive scrapeable water-in-sand multicolor coating;

[0068] Among them, the colored multicolor paint particles comprise the following preparation steps:

[0069] Stir and granulate the colored multicolor paint in the cut-off liquid;

[0070] Among them, the colored multicolor paint comprises the following preparation steps:

[0071] Mix the prepared colored multicolor paint base material and sodium alginate solution evenly in proportion, and then add the protective colloid solution and mix evenly to obtain the colored multicolor paint;

[0072] Among them, the colored multicolor paint base material comprises the following preparation steps:

[0073] First add water into the container in proportion, then add pigment filler, hydroxyethyl cellulose, hydrophobically modified associative cellulose, additives and mix evenly, and then add acrylic emulsion and mix evenly to obtain the colored multicolor paint base material.

[0074] The waterborne reactive scrapeable water-in-sand multicolor coating of this Example 1 comprises 700 parts of colored multicolor paint particles by mass, including 500 parts of colored multicolor paint and 200 parts of cut-off liquid, and 300 parts of continuous phase emulsion. The compositions of the colored multicolor paint, cut-off liquid and continuous phase emulsion are as follows:

[0075] The colored multicolor paint is composed of the following raw materials by mass:

[0076] 150 parts of deionized water, 3 parts of wetting and dispersing agent, 0.5 part of powerful bactericide, 0.5 part of long-acting bactericide, 0.5 part of defoaming agent, 2.5 parts of hydroxyethyl cellulose, 2.5 parts of hydrophobically modified associative cellulose, 0.5 part of pH regulator, 3 parts of antifreeze, 2 parts of film-forming agent, 1 part of titanium dioxide, 34 parts of white sand, 50 parts of 7% protective colloid solution, 100 parts of 3.5% sodium alginate solution, 150 parts of acrylic emulsion;

[0077] Among them, the 3.5% sodium alginate solution is composed of the following raw materials by mass: 3.5 parts of sodium alginate and 96.5 parts of deionized water.

[0078] The cut-off liquid is composed of the following raw materials by mass: 100 parts of 7% protective colloid solution and 100 parts of deionized water;

[0079] The continuous phase emulsion is composed of the following raw materials in parts by mass: 60.5 parts of 5% calcium chloride solution, 239 parts of acrylic emulsion, 0.2 parts of strong fungicide, and 0.3 parts of long-acting fungicide.

[0080] Example 2

[0081] The difference between this embodiment 2 and embodiment 1 is that:

[0082] The invention comprises 650 parts by mass of colored multi-color paint particles, 450 parts by mass of colored multi-color paint, 200 parts by mass of cutting point liquid, and 350 parts by mass of continuous phase emulsion, wherein the compositions of the colored multi-color paint, the cutting point liquid, and the continuous phase emulsion are as follows:

[0083] The colorful paint is composed of the following raw materials in parts by mass: 50 parts of 3.5% sodium alginate solution, and the rest of the composition is the same as that of Example 1.

[0084] The composition of the cutting point solution in this Example 2 is the same as that in Example 1;

[0085] The continuous phase emulsion is composed of the following raw materials in parts by mass: 50.5 parts of 5% calcium chloride solution, 299 parts of acrylic emulsion, 0.2 parts of strong fungicide, and 0.3 parts of long-acting fungicide.

[0086] Example 3

[0087] The difference between Example 3 and Example 1 is that it includes 800 parts by mass of colored multi-color paint particles, 500 parts by mass of colored multi-color paint and 300 parts by mass of cutting point liquid, and 200 parts by mass of continuous phase emulsion, wherein the compositions of the colored multi-color paint, the cutting point liquid and the continuous phase emulsion are as follows:

[0088] The composition of the colorful paint of this embodiment 3 is the same as that of embodiment 1;

[0089] The cutting solution is composed of the following raw materials in parts by mass: 150 parts of 7% protective glue solution and 150 parts of deionized water;

[0090] The continuous phase emulsion is composed of the following raw materials by mass fraction: 60.5 parts of 5% calcium chloride solution, 139 parts of acrylic emulsion, 0.2 parts of strong fungicide, and 0.3 parts of long-acting fungicide.

[0091] Comparative Example 1

[0092] Comparative Example 1 includes 700 parts by mass of colored multi-color paint particles, 500 parts of colored multi-color paint, 200 parts of cutting point liquid, and 300 parts of continuous phase emulsion. The difference between this comparative example and Example 1 is that the composition of the colored multi-color paint in this comparative example 1 is adjusted to be as follows:

[0093] The colorful multi-color paint is composed of the following raw materials by mass parts:

[0094] 200 parts of 3.5% sodium alginate solution, 250 parts of colorful multi-color base material, and the other raw materials and their dosages are the same as those in Example 1;

[0095] The colorful multi-color base material is composed of the following raw materials by mass parts:

[0096] 50 parts of deionized water, and the other raw materials and their dosages are the same as those in Example 1;

[0097] The composition of the cut-off liquid and the continuous phase emulsion in this Comparative Example 1 is the same as that in Example 1.

[0098] Comparative Example 2

[0099] This Comparative Example 2 includes 700 parts of colorful multi-color paint particles by mass parts, including 500 parts of colorful multi-color paint and 200 parts of cut-off liquid, and 300 parts of continuous phase emulsion; the difference from Example 1 is that the composition of the colorful multi-color paint in this Comparative Example 2 is adjusted, and the composition is as follows:

[0100] The colorful multi-color paint is composed of the following raw materials by mass parts:

[0101] 10 parts of 3.5% sodium alginate solution, 440 parts of colorful multi-color base material, and the other raw materials and their dosages are the same as those in Example 1;

[0102] The colorful multi-color base material is composed of the following raw materials by mass parts:

[0103] 240 parts of deionized water, and the other raw materials and their dosages are the same as those in Example 1;

[0104] The composition of the cut-off liquid and the continuous phase emulsion in this Comparative Example 2 is the same as that in Example 1.

[0105] Comparative Example 3

[0106] This Comparative Example 3 includes 700 parts of colorful multi-color paint particles by mass parts, including 500 parts of colorful multi-color paint and 200 parts of cut-off liquid, and 300 parts of continuous phase emulsion;

[0107] The continuous phase emulsion is composed of the following raw materials by mass parts: 239 parts of other emulsion; the other raw materials and their dosages are the same as those in Example 1;

[0108] The composition of the colorful multi-color paint in this Comparative Example 3 is the same as that in Example 1;

[0109] The composition of the cut-off liquid in this Comparative Example 3 is the same as that in Example 1.

[0110] Comparative Example 4

[0111] Comparative Example 4 includes 700 parts by mass of colored multi-color paint particles, including 500 parts of colored multi-color paint and 200 parts of cut-off liquid, and 300 parts of continuous phase emulsion; the difference from Example 1 is that the composition of the continuous phase emulsion in Comparative Example 4 is adjusted, and the composition is as follows:

[0112] The continuous phase emulsion is composed of the following raw materials by mass: 60.5 parts of deionized water, 239 parts of acrylic emulsion, 0.2 part of strong bactericide, and 0.3 part of long-acting bactericide.

[0113] The remaining raw materials and their dosages are the same as those in Example 1.

[0114] Comparative Example 5

[0115] Comparative Example 5 includes 700 parts by mass of colored multi-color paint particles, including 500 parts of colored multi-color paint and 200 parts of cut-off liquid, and 300 parts of continuous phase emulsion; the difference from Example 1 is that the composition of the colored multi-color paint in Comparative Example 5 is adjusted, and the composition is as follows:

[0116] The colored multi-color paint is composed of the following raw materials by mass:

[0117] 155 parts of deionized water, 3 parts of wetting and dispersing agent, 0.5 part of strong bactericide, 0.5 part of long-acting bactericide, 0.5 part of defoaming agent, 0.5 part of pH regulator, 3 parts of antifreeze, 2 parts of film-forming agent, 1 part of titanium dioxide, 34 parts of white sand, 50 parts of 7% protective colloid solution, 100 parts of 3.5% sodium alginate solution, and 150 parts of acrylic emulsion.

[0118] The remaining raw materials and their dosages are the same as those in Example 1.

[0119] Comparative Example 6

[0120] Comparative Example 6 includes 700 parts by mass of colored multi-color paint particles, including 500 parts of colored multi-color paint and 200 parts of cut-off liquid, and 300 parts of continuous phase emulsion; the difference from Example 1 is that the composition of the colored multi-color paint and the cut-off liquid in Comparative Example 6 is adjusted, and the composition is as follows:

[0121] The colored multi-color paint is composed of the following raw materials by mass:

[0122] 50 parts of deionized water is used instead of 50 parts of 7% protective colloid solution;

[0123] The remaining raw materials and their dosages of the colored multi-color paint are the same as those in Example 1.

[0124] The cut-off liquid is composed of the following raw materials by mass: 50 parts of 7% protective colloid solution and 150 parts of deionized water;

[0125] The remaining raw materials and their dosages are the same as those in Example 1.

[0126] Comparative Example 7

[0127] In the present invention, a preparation method of a waterborne reactive scrapeable water-in-sand multicolor coating comprises the following preparation steps:

[0128] Slowly add the continuous phase emulsion to the colored multicolor paint particles under stirring in proportion and mix evenly to obtain the waterborne reactive scrapeable water-in-sand multicolor coating;

[0129] The colored multicolor paint particles include the following preparation steps:

[0130] Stir and granulate the colored multicolor paint in the cut-off liquid;

[0131] The colored multicolor paint includes the following preparation steps:

[0132] Mix the prepared colored multicolor paint base material and the sodium alginate solution evenly in proportion, and then add the protective colloid solution and mix evenly to obtain the colored multicolor paint;

[0133] The colored multicolor paint base material includes the following preparation steps:

[0134] First, add water to the container in proportion, then add the pigment filler, hydroxyethyl cellulose, hydrophobically modified associative cellulose, and additives and mix evenly, and then add the acrylic emulsion and mix evenly to obtain the colored multicolor paint base material.

[0135] The difference between Comparative Example 7 and the preparation method of the present invention lies in:

[0136] Change the addition process of the calcium chloride solution from adding it to the continuous phase emulsion to adding it to the colored multicolor paint. The colored multicolor paint includes the following preparation steps:

[0137] Mix the prepared colored multicolor paint base material and the sodium alginate solution evenly in proportion; mix the calcium chloride solution and the protective colloid solution evenly, and then add them to the colored multicolor paint base material mixed evenly with the sodium alginate solution to obtain the colored multicolor paint;

[0138] The remaining raw materials, dosages, processing steps, and processes are the same as those in Example 1.

[0139] Test Example 1

[0140] Scrape the water-in-sand multicolor coatings provided in Examples 1, 2, and 3 and Comparative Examples 1, 2, 3, 4, 5, and 6 on A4 styrofoam boards respectively, scrape two coats, and the scraping amount per coat is 0.4 - 0.6 kg / m2. The specific construction steps are as follows: Use a putty knife to scrape the same weight of the material on the A4 styrofoam board respectively, scrape and dry.

[0141] Test Example 2

[0142] A series of performance tests were carried out on the scrapeable water-in-oil multicolor coatings provided in the above-mentioned examples and comparative examples, and the results are shown in Table 1 below.

[0143] Among them, the specific test methods are as follows:

[0144] The test method for the state of color dots after scraping is as follows: at room temperature, the water-in-oil multicolor coating is evenly coated on an A4 styrofoam board, and the putty knife is used to scrape back and forth evenly 10 times, and then the state of the color dots is observed.

[0145] The test method for the strength of color dots is as follows:

[0146] At room temperature, the water-in-oil multicolor coating is evenly smeared on a glass plate, and the paint mixing knife is used to smear and step on the dots back and forth evenly and under constant pressure until the color dots are broken, and record the number of times of back-and-forth smearing and pressing.

[0147] The test method for the hardness of the paint film is as follows:

[0148] It is determined according to Method B-Manual Method in GB / T6739-1996 "Determination of Film Hardness by Pencil".

[0149] The test method for adhesion after soaking in water is as follows: after the water-in-oil paint film is soaked in deionized water at 25 °C for 96 h, wipe the water stains on the surface of the paint film with a paper towel, and then determine the adhesion of the paint film after soaking in water according to the cross-cut method in GB / T9286-1998 "Cross-Cut Test for Paint and Varnish Films".

[0150] The test method for thermal storage stability is as follows:

[0151] The water-in-water multicolor coating is filled in a 500 mL sample can, the lid is tightened and sealed, and then it is placed in a constant temperature drying oven and stored for 4 weeks under the accelerated condition of 50 ± 2 °C, and then cooled to room temperature and the state of the sample coating in the can is observed.

[0152] Table 1

[0153]

[0154]

[0155] It can be concluded from the results of the above three examples and seven comparative examples that:

[0156] If the sodium alginate is excessive, the color dots will be mixed and become paste during granulation, resulting in granulation failure; if the addition amount of sodium alginate is insufficient, the strength and toughness of the color dots are insufficient and cannot meet the strength during scraping (Comparative Examples 1-2).

[0157] For the continuous-phase emulsion, an acrylic emulsion that neither reacts with the protective colloid solution nor reacts with the calcium chloride solution needs to be selected to ensure no abnormalities during the color dot granulation. At the same time, after adding the continuous-phase emulsion, the reaction between calcium chloride and sodium alginate improves the toughness of the color dots (Comparative Example 3).

[0158] The role of the calcium chloride solution is to be added as a reactant into the continuous phase. When calcium ions contact sodium alginate, they replace sodium ions to become calcium alginate gel, which coats the surface of the color dots, thereby improving the strength of the color dots, slowing down the damage of calcium ions to the protective colloid, and facilitating processing and mixing. If the calcium chloride solution is not added, the color dots will lack toughness, and during the scraping construction, the color dots will break during a single scraping, unable to support the scraping (Comparative Example 4).

[0159] The cellulose ethers in the colored multicolor paint base material, including hydroxyethyl cellulose and hydrophobically modified associative cellulose, will have a swelling and thickening effect during the production of the base material, and the cellulose molecular chains will be evenly dispersed in the base material. Subsequently, the hydrogen ions on the end face layer of the protective colloid particles in the added protective colloid solution will form hydrogen bonds with the hydroxyl groups at the ends of the cellulose ether molecular chains to undergo a cross-linking reaction, forming a "framework structure" in the color dot system, which preliminarily gels the base material. Subsequently, during the granulation stage, the preliminarily gelled base material is added to the granulation liquid, and the granulation process will cause the preliminarily gelled base material to further react with the protective colloid solution in the granulation liquid, further gelling the surface of the base material particles, firmly fixing the tinted base paint in the "framework", and forming stable colloidal particles. If cellulose ether is not added to the base material, the color dots will bleed during the granulation stage and it will be difficult to form (Comparative Example 5).

[0160] If an appropriate amount of protective colloid solution is not added to the colored multicolor paint base material before the granulation stage, the base material will not be preliminarily gelled. If the content of the protective colloid in the cutting liquid is insufficient, the preliminarily gelled base material particles cannot be further gelled on the surface, and situations such as color dot bleeding and difficulty in forming color dots will occur (Comparative Example 6).

[0161] Through the two-step process of the present invention, the color dots are first formed and then toughened. Under the condition of ensuring that the shape and size of the color dots are consistent, the color dots have the ability to be scraped. If the two-step process is not implemented, but the two-step reaction is directly completed in one step, calcium ions will react with the protective colloid in advance, resulting in insufficient protective colloid and calcium ions that should react with the colored multicolor paint, causing situations such as color dot bleeding, difficulty in controlling the size of color dots, and excessive broken dots during the granulation stage, affecting the final construction effect of the finished product and the surface effect after film formation (Comparative Example 7).

[0162] In summary, the above are only the preferred embodiments of the present invention, and there is no any form of restriction on the present invention; any equivalent changes, modifications and evolutions made by those skilled in the art within the scope of the technical solution of the present invention by using the disclosed technical content are regarded as the equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments according to the essential technology of the present invention still fall within the protection scope of the technical solution of the present invention.

[0163] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered that the scope described in this specification.

[0164] The experimental methods without specific conditions mentioned in the present invention usually follow the conventional conditions or the conditions recommended by the manufacturers.

[0165] For various optimization technical solutions in the present invention, unless otherwise stated, the various optimization technical solutions can be combined with each other.

[0166] Unless otherwise stated, the percentages and parts are weight percentages and weight parts.

[0167] The experimental methods without specific conditions mentioned in the specification and the embodiments usually follow the conventional conditions or the conditions recommended by the manufacturers.

[0168] Unless otherwise defined, all the professional and scientific terms used herein have the same meaning as those familiar to those skilled in the art. In addition, any methods and materials similar or equivalent to the described content can be applied to the method of the present invention.

Claims

1. A water-based reactive scrapeable water-in-sand multicolor coating, characterized in that: It comprises the following components in parts by mass: 600 - 800 parts of colored multicolor paint particles and 200 - 500 parts of continuous phase emulsion; The colored multicolor paint particles include: 450 - 500 parts of colored multicolor paint and 200 - 300 parts of cut-off liquid; The cut-off liquid includes: 100 - 150 parts of protective colloid solution and 100 - 150 parts of water; The mass percentage concentration of the protective colloid solution is 5 - 10%; The solute of the protective colloid solution is magnesium aluminum silicate; The colored multicolor paint includes: 50 - 150 parts of sodium alginate solution, 40 - 90 parts of protective colloid solution, and 300 - 500 parts of colored multicolor paint base; The mass percentage concentration of the protective colloid solution is 5 - 10%; The solute of the protective colloid solution is magnesium aluminum silicate; The sodium alginate solution includes the following components in parts by mass: 3 - 4 parts of sodium alginate and 85 - 115 parts of water; The sodium alginate is an alginate with a high G segment content and high gelation strength; The colored multicolor paint base includes: 35 - 40 parts of pigment filler, 10 - 15 parts of additives, 100 - 200 parts of acrylic emulsion, 2 - 3 parts of hydroxyethyl cellulose, 2 - 3 parts of hydrophobically modified associative cellulose, and 100 - 300 parts of water; The continuous phase emulsion includes 50 - 100 parts of calcium ion solution, 150 - 400 parts of acrylic emulsion, and 0 - 2 parts of additives.

2. The water-based reactive scrapeable water-in-sand multicolor coating according to claim 1, characterized in that: The additives in the colored multicolor paint base include one or a combination of several of thickener, wetting dispersant, bactericide, defoamer, pH regulator, antifreeze, film-forming agent; The additives in the continuous phase emulsion include one or a combination of several of bactericide, pH regulator, film-forming agent, antifreeze, and thickener.

3. The water-based reactive scrapeable water-in-sand multicolor coating according to claim 1, characterized in that: The protective colloid solutions in the colored multicolor paint and the cut-off liquid are synthetic flaky magnesium aluminum silicate modified by pyrophosphate radical.

4. The water-based reactive scrapeable water-in-sand multicolor coating according to claim 1, characterized in that: The calcium ion solution in the continuous phase emulsion is a 5% concentration calcium chloride solution.

5. A preparation method of the water-based reactive scrapeable water-in-sand multicolor coating according to claim 1, characterized in that: It comprises the following preparation steps: Slowly add the continuous phase emulsion in proportion to the colored multicolor paint particles under stirring and mix evenly to obtain the water-based reactive scrapeable water-in-sand multicolor coating; Among them, the colored multicolor paint particles include the following preparation steps: Stir and granulate the colored multicolor paint in the cut-off liquid; Among them, the colored multicolor paint includes the following preparation steps: Mix the prepared colored multicolor paint base and sodium alginate solution evenly in proportion, and then add the protective colloid solution and mix evenly to obtain the colored multicolor paint; Among them, the colored multicolor paint base includes the following preparation steps: First, add water to the container in proportion, then add pigments, fillers, hydroxyethyl cellulose, hydrophobically modified associative cellulose, and additives and mix them evenly, and then add acrylic emulsion and mix evenly to obtain a colored multi-color paint base material.

6. A construction method of the waterborne reactive scrapeable water-in-sand multi-color coating according to claim 1, characterized in that: It is constructed by scraping or spraying.

7. An application of the waterborne reactive scrapeable water-in-sand multi-color coating according to claim 1 in interior or exterior wall decorative coatings.

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