Colorful paint with bleeding resistance and high toughness as well as preparation method and application of colorful paint

Abstract

The invention belongs to the technical field of coatings, and particularly relates to an anti-bleeding and high-toughness multicolor coating as well as a preparation method and application thereof. The multicolor paint comprises a toning base paint and a continuous phase, the toning base paint comprises an emulsion, cellulose, a pH regulator, a special reactant, a first auxiliary agent and water; the cellulose comprises hydrophobic modified hydroxyethyl cellulose; the molecular weight of the hydrophobic modified hydroxyethyl cellulose is greater than or equal to 100000; the hydrophobic modified hydroxyethyl cellulose comprises hydroxyethyl cellulose modified by a hydrophobic monomer; the pH regulator is selected from at least one of an amine pH regulator and an organic silicon pH regulator; the special reactant comprises at least one of ketone and aldehyde. Through the combined action of the special reactant, the specific type of cellulose and the specific type of pH regulator and in combination with other components, the multicolor paint has good comprehensive properties such as bleeding resistance, flexibility, initial water resistance and water resistance, and is high in production efficiency due to the fact that protection glue is not used.

Description

Technical Field

[0001] The invention belongs to the technical field of coatings, and particularly relates to a multi-colored coating with high toughness and anti-colorization, and a preparation method and application thereof. Background Art

[0002] Traditional building decoration materials, such as natural stone, have natural texture and colorful appearance, but they are heavy, complex to construct, easy to crack, and their appearance is easily affected by environmental factors and unstable. At the same time, as people continue to recognize the protection of natural resources and the concept of environmental protection and energy saving, the application of natural stone in the field of building decoration has gradually decreased, and imitation stone coatings have come into being.

[0003] There are three main types of imitation stone paint: real stone paint, sand glue paint, and colorful paint. Traditional real stone paint and sand glue paint have a high dosage (3-5 kg ​​per square meter), consume a lot of resources, have average decorative effects, and have high construction requirements and complicated protection. A high-power air compressor is required during the painting process, and the degree of atomization is high, which not only wastes electricity, but also causes environmental pollution and noise pollution. Colorful paint uses colloid technology and surface treatment technology to refine and wrap liquid water-based resin into a variety of colloidal water-based color particles of different sizes and colors, and evenly and stably suspend and disperse them in a special continuous phase water-based emulsion paint. After one-time construction and molding, the pattern effect of the finished imitation granite stone can reach a realistic level. At the same time, this kind of colorful paint is mainly based on low-pressure spraying, which is energy-saving and environmentally friendly, easy to construct, and has the characteristics of durability and convenient repair due to its excellent weather resistance. In recent years, it has gradually replaced stone and traditional real stone paint and has been widely used in exterior wall decoration, and its development prospects are very broad.

[0004] At present, almost all colorful coatings use protective glue as the intercalant, which forms a house-of-cards structure with cellulose through hydrogen bonds and van der Waals forces, so that the color particles can be evenly dispersed in the continuous phase to form colorful coatings. Common protective glue components include sodium pyrophosphate, sodium hexametaphosphate, magnesium aluminum silicate, magnesium lithium silicate, polyvinyl alcohol, etc. Although the house-of-cards structure formed by their cross-linking with cellulose can increase the production stability, storage stability and construction stability of colorful coatings, it will cause the color particles to have small cohesion, poor toughness and low strength, resulting in the shortcomings of being fragile, easy to paste and easy to color when mixed and stirred. These disadvantages are particularly evident in water-based sand colorful coatings. In actual use, the sprayed colorful coatings will fall off, have a short service life, large color difference, and cause certain damage to the human body and wall. In addition, in the preparation process, it is often necessary to mix and pre-process the color particles and protective glue, which is complicated and cumbersome, and has low production efficiency.

[0005] Therefore, it is urgent to provide a colorful coating which has good anti-bleeding property and toughness and does not contain protective glue, so that the production efficiency is high. Summary of the invention

[0006] The present invention aims to solve one or more technical problems existing in the above-mentioned prior art and at least provide a beneficial choice. Specifically, the present invention provides a multi-color coating, which has good anti-bleeding and toughness, does not contain protective glue, does not need to mix color particles and protective glue for pre-processing, and has high production efficiency.

[0007] The inventive concept of the present invention is as follows: the multi-color coating of the present invention comprises a tinting base paint and a continuous phase; the tinting base paint comprises an emulsion, cellulose, a pH regulator, a special reactant, a first auxiliary agent and water; the cellulose comprises hydrophobically modified hydroxyethyl cellulose; the molecular weight of the hydrophobically modified hydroxyethyl cellulose is greater than or equal to 100,000; the hydrophobically modified hydroxyethyl cellulose comprises hydroxyethyl cellulose modified by a hydrophobic monomer; the pH regulator is selected from at least one of an amine pH regulator and an organosilicon pH regulator; the special reactant comprises at least one of a ketone and an aldehyde.

[0008] Firstly, the present invention activates the free hydroxyl groups of the hydrophobically modified hydroxyethyl cellulose under the alkaline conditions provided by a specific pH regulator, and adds a special reactant to cause a nucleophilic addition reaction between the two to form an ether structure to replace the hydrophilic hydroxyl groups, thereby improving the hydrophobicity of the tinting base paint, achieving the immiscibility between the color particles and the continuous phase, and achieving the effect of a colorful paint without protective glue. The coating does not need to use protective glue, which not only does not need to dissolve the protective glue solid, but also does not need to process the protective glue on the color base paint, making the preparation process simple and improving the production efficiency; secondly, the above-mentioned substitution reaction in the present invention is fully carried out under alkaline conditions, and the hydrophilic hydroxyl group is completely substituted, which greatly improves the hydrophobicity of the color particles prepared by the color base paint, reduces the formation of bridging channels such as hydrogen bonds between the molecules of the color particles and the continuous phase, and greatly reduces the color penetration and color change of the color particles; finally, the present invention uses high molecular weight hydrophobic modified hydroxyethyl cellulose in the color base paint, and its molecular chain is more complicated after swelling in the water phase, and the molecular chain is further complicated after the hydroxyl substitution, and the molecular chains between the cellulose are entangled with each other to form a three-dimensional network structure, which enhances the cohesive strength and toughness of the color point, making the color particles not easy to break, and improving the problem of easy paste in the construction of traditional multi-color coatings. In short, through the joint action of various components, the present invention makes the multi-color coating have good comprehensive properties such as anti-color penetration, flexibility, good appearance, initial crack resistance, initial water resistance, water resistance, alkali resistance, coating temperature change resistance, and stain resistance.

[0009] Therefore, a first aspect of the present invention provides a multi-colored paint having high toughness and anti-bleeding properties.

[0010] Specifically, the anti-bleeding and high-toughness colorful paint includes a color-adjusting base paint and a continuous phase;

[0011] The toning base paint comprises emulsion, cellulose, pH regulator, special reaction agent, first auxiliary agent and water;

[0012] The cellulose includes hydrophobically modified hydroxyethyl cellulose; the molecular weight of the hydrophobically modified hydroxyethyl cellulose is greater than or equal to 100,000;

[0013] The hydrophobically modified hydroxyethyl cellulose includes hydroxyethyl cellulose modified by a hydrophobic monomer;

[0014] The pH adjuster is selected from at least one of an amine pH adjuster and an organosilicon pH adjuster;

[0015] The special reactant includes at least one of ketone and aldehyde.

[0016] Preferably, the ketone includes at least one of acetone and butanone.

[0017] Preferably, the aldehyde comprises at least one of propionaldehyde and n-butyraldehyde.

[0018] Preferably, the molecular weight of the hydrophobically modified hydroxyethyl cellulose is 100,000-300,000.

[0019] Preferably, the cellulose includes any one or more of Ashland HMHEC, Aksu EHM500, and Ashland HE-10K.

[0020] Specifically, the cellulose is a high molecular weight hydrophobically modified hydroxyethyl cellulose, such as Ashland HMHEC, which uses a macromolecular reaction method to graft the hydrophobic monomer dodecane bromide onto ordinary hydroxyethyl cellulose HEC. Compared with ordinary hydroxyethyl cellulose HEC, the high molecular weight hydrophobically modified hydroxyethyl cellulose has a more complex molecular chain after water phase thickening, and forms a more intensive physical cross-linking inside the color base paint, which can increase the strength and toughness of the color particles, making the color particles less likely to break, and improving the problem of easy blurring during the construction of traditional multi-color paints.

[0021] Preferably, the pH adjuster includes any one or more of Dow AMP-95 and Wacker BS168.

[0022] Specifically, the pH regulator is a multifunctional pH regulator, which is colorless and odorless and has a dispersing effect, and can provide an alkaline pH environment in a long-term and stable manner.

[0023] Specifically, in the present invention, on the one hand, compared with ordinary hydroxyethyl cellulose, after the water phase thickening, the more complex molecular chains inside the high molecular weight hydrophobic modified hydroxyethyl cellulose will be fully unfolded, and while locking the water molecules, its hydrophobic groups will combine with the powder and emulsion in the toning base paint to form physical crosslinks, thereby enhancing the toughness and strength of the toning base paint, thereby improving the toughness and strength of the multi-color coating. On the other hand, compared with ordinary hydroxyethyl cellulose, the high molecular weight hydrophobic modified hydroxyethyl cellulose only retains a small amount of hydroxyl groups as hydrophilic groups, reducing the hydrophilicity of the toning base paint, thereby reducing the degree of color particle bleeding. At the same time, in the stable alkaline environment provided by a specific type of pH regulator, the hydrogen on the hydroxyl group of the hydrophobically modified hydroxyethyl cellulose is stripped, thereby protonating to an alcohol cation, which is easy to undergo nucleophilic addition with the carbonyl carbon on the special reactant to form an unstable hydroxyaldehyde structure, and then further dehydrated under alkaline conditions to form a stable ether structure. The reaction is fully carried out under alkaline conditions, and the ether structure replaces the hydrophilic hydroxyl group. Due to the replacement of the hydroxyl group, the hydrophilicity of the tinting base paint is reduced, the hydrophobicity is enhanced, and the color particles are immiscible with the continuous phase, thereby achieving the effect of free protective glue; and reducing the formation of intermolecular hydrogen bonds between the color particles and between the color particles and the continuous phase, further improving the color particle bleeding and color diffusing. At the same time, the hydrophobically modified hydroxyethyl cellulose after nucleophilic addition has a more complex network structure, and the network structure between the cellulose molecules is intertwined to form a three-dimensional network, which further enhances the cohesive strength and toughness of the color particles, making the color particles not easy to break, thereby making the colorful paint have good strength and flexibility.

[0024] Preferably, the continuous phase comprises an emulsion, bentonite, a pH adjuster, a second auxiliary agent and water.

[0025] Preferably, the emulsion comprises silicone-acrylic emulsion.

[0026] Preferably, the silicone-acrylic emulsion includes any one or more of Budford RS-8625 and Budford RS-3799.

[0027] Specifically, the emulsion is a silicone-acrylic emulsion polymerized by a core-shell coating polymerization process. The material distribution of the outer layer of the emulsion particles is optimized by self-crosslinking technology, so that the emulsion forms a dense film. The colorful paint thus prepared has excellent weather resistance and water resistance, and also has good color retention and adhesion. The type of emulsion in the coloring base paint and the continuous phase is the same.

[0028] Preferably, the first auxiliary agent includes at least one of a wetting agent, a film-forming auxiliary agent, an antifreeze agent, a preservative, a defoaming agent, and a thickener.

[0029] Preferably, the second auxiliary agent includes at least one of a film-forming auxiliary agent, an antifreeze agent, a preservative, a defoaming agent, and a thickener.

[0030] Preferably, the tinted base paint further comprises a filler.

[0031] Preferably, the filler includes at least one of quartz sand, titanium dioxide and kaolin.

[0032] Preferably, the first auxiliary agent includes a wetting agent, a film-forming agent, an antifreeze agent, a preservative, a defoamer and a thickener; the second auxiliary agent includes a film-forming agent, an antifreeze agent, a preservative, a defoamer and a thickener; the filler includes quartz sand, titanium dioxide and kaolin; and the toning base paint includes 18-45 parts of water, 0.45-1.1 parts of cellulose, and 0.18-0.55 parts of a pH regulator in parts by weight. , special reaction agent 0.45-1.1 parts, wetting agent 0.18-0.45 parts, film-forming aid 0.45-1.1 parts, antifreeze agent 0.18-0.55 parts, emulsion 9-22 parts, preservative 0.05-0.11 parts, defoaming agent 0.05-0.11 parts, quartz sand 22-55 parts, titanium dioxide 0.9-3.3 parts, kaolin 7-11 parts, thickener 0.1-0.22 parts;

[0033] The continuous phase includes 55-75 parts of water, 0.45-1.1 parts of bentonite, 0.1-0.22 parts of pH regulator, 1.1-2.0 parts of film-forming aid, 0.45-1.1 parts of antifreeze, 22-38 parts of emulsion, 0.05-0.11 parts of defoamer, 0.1-0.22 parts of thickener and 0.05-0.11 parts of preservative.

[0034] Further preferably, the toning base paint comprises, by weight, 20-40 parts of water, 0.5-1 parts of cellulose, 0.2-0.5 parts of pH regulator, 0.5-1 parts of special reaction agent, 0.2-0.4 parts of wetting agent, 0.5-1 parts of film-forming aid, 0.2-0.5 parts of antifreeze agent, 10-20 parts of emulsion, 0.05-0.1 parts of preservative, 0.05-0.1 parts of defoamer, 25-50 parts of quartz sand, 1-3 parts of titanium dioxide, 8-10 parts of kaolin, and 0.1-0.2 parts of thickener;

[0035] The continuous phase includes 60-70 parts of water, 0.5-1 parts of bentonite, 0.1-0.2 parts of pH regulator, 1.2-1.8 parts of film-forming aid, 0.5-1 parts of antifreeze, 25-35 parts of emulsion, 0.05-0.1 parts of defoamer, 0.1-0.2 parts of thickener and 0.05-0.1 parts of preservative.

[0036] Preferably, the wetting agent is an environmentally friendly synthetic alcohol polyoxyethylene ether surfactant, does not contain APEO and VOC, and has excellent wettability, water resistance and color development. Preferably, it is any one or more of Shanghai Xiangyue's wetting agent XY119, San Nopco AD504, and Clariant PF20.

[0037] Preferably, the quartz sand includes any one or more of Saiyu 40-120 mesh crystal white sand and Henkel 40-120 mesh white sand.

[0038] Specifically, the quartz sand is a high-whiteness, high-strength, transparent round sand, which can enhance the strength of color particles, provide a texture effect for the colorful colors, and is not easy to penetrate the outer layer of the color particles, thereby reducing sand leakage and color seepage.

[0039] Preferably, the titanium dioxide includes any one or more of Theoval R-216 and Huntsman Altiris 550 titanium dioxide.

[0040] Specifically, the titanium dioxide is a rutile titanium dioxide, which has excellent reflective heat insulation performance and high whiteness, and can provide good covering power and reflective heat insulation effect for the coating.

[0041] Preferably, the kaolin includes any one or more of Jinyu ED-80, Sanxin SX-80A, Jinyu DB-80, and Hengyuan HY-T-60.

[0042] Specifically, the kaolin is a calcined kaolin, which is calcined at high temperature, has fine and uniform particle size, has high whiteness, and can further provide good hiding power for the coating.

[0043] Specifically, the selectable types of film-forming aids, antifreeze agents, preservatives, defoamers, and thickeners in the tinted base paint are consistent with those in the continuous phase.

[0044] Preferably, the film-forming aid includes an alcohol ester film-forming aid, which has good compatibility with the emulsion and high film-forming efficiency.

[0045] Preferably, the film-forming aid includes any one or more of Dow COASOL, Runtai dodecanol ester, Huachang Zhidian hexadecyl ester, and Dow COASOL 290.

[0046] Preferably, the antifreeze agent comprises a water-soluble alcohol antifreeze liquid, which can greatly reduce the freezing point of the entire coating after mixing with water, thereby improving the antifreeze performance of the coating.

[0047] Preferably, the antifreeze agent includes any one or more of ethylene glycol and propylene glycol.

[0048] Preferably, the preservative includes a kasone preservative, which can simultaneously inhibit the growth and reproduction of bacteria (including Gram-negative and Gram-positive bacteria) and fungi (yeast, mold, etc.), and is a low-toxic, high-efficiency, broad-spectrum bactericidal kasone preservative.

[0049] Preferably, the preservative includes any one or more of Thor LPC1, Hikmaise preservative KFS, and Hikmaise preservative BTE.

[0050] Preferably, the defoaming agent includes a silicone defoaming agent, which has strong defoaming and anti-foaming properties, so that the coating film has no residue and the microbubbles are more beautiful, and is suitable for high-viscosity coatings that are applied in one go.

[0051] Preferably, the defoaming agent includes any one or more of BS-2608 from Bosheng Chemical and BYK-346 from BYK Chemical.

[0052] Preferably, the thickener comprises a hydrophobically modified associative alkali swelling thickener, which can improve the mid-shear viscosity at a relatively low dosage and can effectively improve the fluidity and leveling of the coating.

[0053] Preferably, the thickener includes any one or more of Rohm and Haas AR-6159, Rohm and Haas AR-9359, and Dow RM-8W.

[0054] Preferably, the bentonite comprises polymer modified bentonite, which has excellent anti-sagging, suspension and matting properties, so that the continuous phase has a good supporting effect on the sand-containing color particles, thereby improving the storage stability of the coating.

[0055] Preferably, the bentonite includes any one or more of BENAQUA4000 and Clariant AT78 bentonite.

[0056] Preferably, the multi-colored paint further includes color paste.

[0057] Preferably, the color paste includes an inorganic color paste; further preferably, the color paste includes at least one of iron red, iron yellow, and iron black; even more preferably, the color paste includes iron red, iron yellow, and iron black.

[0058] Preferably, the color paste accounts for 0.8-1.2% by mass of the tinted base paint; further preferably, the color paste accounts for 0.9-1.1% by mass of the tinted base paint; further preferably, the color paste accounts for 1% by mass of the tinted base paint.

[0059] Preferably, the mass ratio of the tinted base paint to the continuous phase is (3.5-8):2; further preferably, the mass ratio of the tinted base paint to the continuous phase is (4-7):2.

[0060] Preferably, the multi-colored paint further comprises water.

[0061] The second aspect of the present invention provides a method for preparing the anti-bleeding and high-toughness colorful coating according to the first aspect of the present invention.

[0062] Specifically, the method for preparing the anti-bleeding and high-toughness colorful coating comprises the following steps:

[0063] The tinted base paint and the continuous phase are mixed to obtain the multi-colored paint.

[0064] Preferably, the method for preparing the anti-bleeding and high-toughness colorful coating comprises the following steps:

[0065] The color-adjusting base paint and color paste are mixed and granulated to obtain color particles; the color particles are mixed with a continuous phase to obtain the colorful paint.

[0066] Further preferably, the method for preparing the anti-bleeding and high-toughness colorful coating comprises the following steps:

[0067] The color-adjusting base paint, color paste and water are mixed and granulated to obtain color particles; the color particles are mixed with a continuous phase to obtain the colorful paint.

[0068] Preferably, the tinting base paint and color paste are first mixed to obtain a colored base paint, and then the colored base paint and water are mixed and granulated to obtain the colored particles.

[0069] Preferably, the granulation is carried out using a screw ribbon, a three-blade paddle or a granulator.

[0070] The third aspect of the present invention provides an application of the anti-bleeding and high-toughness colorful paint described in the first aspect of the present invention in the field of architecture.

[0071] The multi-colored paint of the present invention is a non-reactive single-component paint, which can be directly applied and waited for drying. The curing principle is relatively simple and easy to use. After being applied on the wall, the solvent gradually evaporates, the concentration of the solid component gradually increases, and finally a dense coating film is formed.

[0072] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0073] (1) Compared with conventional ordinary hydroxyethyl cellulose, the high molecular weight hydrophobically modified hydroxyethyl cellulose of the present invention is subjected to water phase thickening, and the more complex molecular chains inside are fully unfolded. While locking water molecules, its hydrophobic groups are combined with the powder and emulsion in the color base paint to form physical crosslinks, thereby enhancing the toughness and strength of the color base paint, and thus improving the toughness and strength of the multi-color paint. In addition, by activating the free hydroxyl groups of the hydrophobically modified hydroxyethyl cellulose under alkaline conditions provided by a specific pH regulator, and adding a special reactant, a nucleophilic addition reaction is caused between the two to form an ether structure to replace the hydrophilic hydroxyl groups, thereby improving the hydrophobicity of the color base paint, achieving the incompatibility between the color particles and the continuous phase, and achieving the effect of the multi-color paint being free of protective glue. Not using protective glue not only does not require the dissolution of protective glue solids, but also does not require the color base paint to be processed with protective glue, making the preparation process simple and improving production efficiency.

[0074] (2) The substitution reaction of the hydrophilic hydroxyl group by the ether structure of the present invention is fully carried out under alkaline conditions, and the hydrophilic hydroxyl group is completely substituted, which greatly improves the hydrophobicity of the color particles, reduces the formation of bridging channels such as intermolecular hydrogen bonds with the continuous phase, greatly reduces the color bleeding of the color particles, and improves the anti-color bleeding of the colorful coating.

[0075] (3) The hydrophobically modified hydroxyethyl cellulose after nucleophilic addition of the present invention has a more complex network structure. The network structure between the cellulose molecules is entangled with each other to form a three-dimensional network, which further enhances the cohesive strength and toughness of the color particles, making the color particles not easy to break, and can improve the problem of easy paste during the construction of traditional multi-color coatings. In short, through the joint action of various components, the present invention makes the multi-color coating have good anti-bleeding, flexibility, good appearance, initial crack resistance, initial water resistance, water resistance, alkali resistance, coating temperature change resistance, stain resistance and other comprehensive properties. DETAILED DESCRIPTION

[0076] In order to make the technical scheme of the present invention more clearly understood by those skilled in the art, the following embodiments are listed for illustration. It should be pointed out that the following embodiments do not limit the protection scope of the present invention.

[0077] Unless otherwise specified, the raw materials, reagents or devices used in the following examples can be obtained from conventional commercial sources or by existing known methods.

[0078] The raw material components and amounts of the toning base paint and the continuous phase in the anti-bleeding and high-toughness colorful coatings of Examples 1-3 of the present invention are shown in Table 1.

[0079] Table 1: Raw material components and amounts (in parts by weight) of the tinting base paint and the continuous phase in the multi-color coating with high toughness and anti-bleeding properties of Examples 1-3.

[0080]

[0081]

[0082] Example 1

[0083] A multi-color coating with high toughness and anti-colorization properties is composed, by weight, of 65 parts of a color-adjusting base paint, 25 parts of a continuous phase, 10 parts of deionized water, and 0.65 parts of an inorganic color paste (iron red, iron yellow and iron black having a mass ratio of 1:1:1).

[0084] The raw material components and amounts of the tinting base paint and the continuous phase are shown in Table 1.

[0085] The method for preparing a multi-colored coating with high toughness and anti-bleeding properties comprises the following steps:

[0086] (1) adding a color base paint into a container, adding an inorganic color paste to color the paint at a rotation speed of 400 rpm to obtain a color base paint;

[0087] (2) adding deionized water into a mixing container, and adding the colored base paint obtained in step (1), and granulating using a granulator to obtain colored particles;

[0088] (3) Under stirring, the continuous phase is added to the color particles obtained in step (2), and stirred evenly to obtain a multi-colored coating with high toughness and anti-bleeding properties.

[0089] The preparation process of the color-matching base paint includes the following steps:

[0090] Deionized water is added to the reaction container, cellulose is added and fully dispersed for 5 minutes at a speed of 700 rpm, a pH adjuster is added, and the dispersion continues until it becomes a translucent viscous liquid; the speed is adjusted to 900 rpm, and wetting agent, film-forming aid, antifreeze agent, defoaming agent and preservative are added in sequence, and titanium dioxide and kaolin are added, and dispersed at high speed until the fineness is ≤50 μm; finally, under stirring, emulsion, quartz sand, and thickener are added in sequence, and after stirring evenly, the special reaction agent is slowly added, and the speed is adjusted to 400 rpm and stirred for 15 minutes to obtain a color-matching base paint.

[0091] The preparation process of the continuous phase comprises the following steps:

[0092] Deionized water is added into a reaction container, and bentonite is added at a rotation speed of 1000 rpm, and dispersed into a translucent viscous liquid; then the rotation speed is adjusted to 600 rpm, and a pH regulator, a film-forming aid, an antifreeze agent, a defoaming agent, a preservative, an emulsion and a thickener are added in sequence, and a continuous phase is obtained after stirring evenly.

[0093] Example 2

[0094] A multi-color coating with high toughness and anti-colorization performance is composed, by weight, of 60 parts of a color-adjusting base paint, 30 parts of a continuous phase, 10 parts of deionized water, and 0.60 parts of an inorganic color paste (iron red, iron yellow and iron black having a mass ratio of 1:1:1).

[0095] The raw material components and amounts of the tinting base paint and the continuous phase are shown in Table 1.

[0096] The preparation method of Example 2 anti-color bleeding and high-toughness colorful coating is the same as that of Example 1.

[0097] Example 3

[0098] A multi-color coating with high toughness and anti-colorization properties is composed, by weight, of 70 parts of a color-adjusting base paint, 20 parts of a continuous phase, 10 parts of deionized water, and 0.70 parts of an inorganic color paste (iron red, iron yellow and iron black having a mass ratio of 1:1:1).

[0099] The raw material components and amounts of the tinting base paint and the continuous phase are shown in Table 1.

[0100] The preparation method of the multi-colored coating with high toughness and anti-color bleeding is the same as that of Example 1.

[0101] Comparative Example 1

[0102] The difference between Comparative Example 1 and Example 1 is that in the tinting base paint of Comparative Example 1, ordinary hydroxyethyl cellulose (Enze Chemical 250HBR hydroxyethyl cellulose) is used to replace the high molecular weight hydrophobically modified hydroxyethyl cellulose in Example 1 in an equal amount, and the rest is the same as Example 1.

[0103] Comparative Example 2

[0104] The difference between Comparative Example 2 and Example 1 is that in the tinting base paint of Comparative Example 2, a lower molecular weight hydrophobically modified hydroxyethyl cellulose (Ashland cellulose HE3KB, HE3KB has a molecular weight of 30,000) is used to replace the high molecular weight hydrophobically modified hydroxyethyl cellulose (Ashland HE-10K has a molecular weight of 100,000) in Example 1 in equal amounts, and the rest is the same as Example 1.

[0105] Comparative Example 3

[0106] The difference between Comparative Example 3 and Example 1 is that in the tinting base paint of Comparative Example 3, an equal amount of ammonia water is used to replace AMP-95 in Example 1 to provide an alkaline environment, and the rest is the same as Example 1.

[0107] Comparative Example 4

[0108] The difference between Comparative Example 4 and Example 1 is that in the tinting base paint of Comparative Example 4, an equal amount of deionized water is used to replace the special reactant, that is, no special reactant is contained, and the rest is the same as Example 1.

[0109] Performance Testing

[0110] The anti-bleeding and high-toughness colorful coatings prepared in Examples 1-3 and Comparative Examples 1-4 were subjected to relevant performance tests, and the test items and test methods are as follows:

[0111] Construction performance: Tested in accordance with the construction performance method 6.5.8 of HGT 4343-2024 water-based multi-color architectural coatings;

[0112] Drying time (surface drying): Tested according to 6.5.5 Drying time method in HGT 4343-2024 Water-based multi-color architectural coatings;

[0113] Initial crack resistance: Tested according to 6.5.6 Initial drying crack resistance method in HGT 4343-2024 water-based multi-color architectural coatings;

[0114] Initial water resistance: Tested according to the initial water resistance method in 6.5.7 of HGT 4343-2024 water-based multi-color architectural coatings;

[0115] Coating appearance: Tested according to the coating appearance method in 6.5.9 of HGT 4343-2024 Water-based multi-color architectural coatings;

[0116] Water resistance: Tested according to the water resistance method 6.5.13 in HGT 4343-2024 water-based multi-color architectural coatings;

[0117] Alkali resistance: Tested according to 6.5.12 alkali resistance method in HGT 4343-2024 water-based multi-color architectural coatings;

[0118] Flexibility: Tested according to the flexibility method 6.5.15 in HGT 4343-2024 Water-based multi-color architectural coatings;

[0119] Coating temperature change resistance: Tested according to 6.5.17 coating temperature change resistance method in HGT 4343-2024 water-based multi-color architectural coatings;

[0120] Stain resistance: Tested according to the stain resistance method 6.5.18 in HGT 4343-2024 Water-based multi-color architectural coatings;

[0121] Anti-bleeding: ① Test according to the hot storage stability method in 6.5.3 of HGT 4343-2024 water-based multi-color architectural coatings; ② Test according to the low temperature stability method in 6.5.4 of HGT 4343-2024 water-based multi-color architectural coatings; After the coating has been stored at hot and low temperatures for a specified period of time, visually observe the coloring of the continuous phase, and judge the coloring as qualified if there is no coloring of the color paste;

[0122] Color dot toughness: Tested according to the 5.4.9 washability method in HGT 4343-2012 water-based multi-color architectural coatings; the number of washes when the coating is damaged is used as the basis for judgment. The higher the number of washes, the better the color dot toughness.

[0123] The performance test results of the multi-color coatings of Examples 1-3 are shown in Table 2, and the performance test results of the multi-color coatings of Comparative Examples 1-4 are shown in Table 3.

[0124] Table 2: Performance test results of multi-color coatings of Examples 1-3

[0125]

[0126]

[0127] Table 3: Performance test results of multi-color coatings of Comparative Examples 1-4

[0128]

[0129] As can be seen from Table 2, the multi-color coating of the present invention has good construction performance, surface drying time, initial crack resistance and coating appearance. The present invention uses high molecular weight hydrophobic modified hydroxyethyl cellulose in the color base paint to increase the hydrophobicity of the color particles, giving the coating excellent initial water resistance, water resistance, alkali resistance, stain resistance and color penetration resistance. At the same time, by adding special reactants to replace the hydrophilic hydroxyl groups of cellulose, the molecular chains are further complicated, cross-linked to form a three-dimensional network structure, the color particle's anti-bleeding and strength, toughness, giving the coating excellent flexibility, coating temperature resistance and color point toughness. In addition, the multi-color coating of the present invention is free of protective glue. Compared with the traditional multi-color manufacturing process, it eliminates the two production process steps of preparing the protective glue solution and mixing the color particles with the protective glue, which can reduce the production time by 20% and has high production efficiency.

[0130] Comparative Example 1 uses ordinary hydroxyethyl cellulose instead of high molecular weight hydrophobically modified hydroxyethyl cellulose. On the one hand, the tinting base paint has too many hydrophilic hydroxyl groups, and the substitution reaction of the hydrophilic hydroxyl groups is incomplete, which increases the hydrophilicity of the tinting base paint, resulting in poor anti-bleeding, water resistance and stain resistance. On the other hand, ordinary hydroxyethyl cellulose has a short molecular chain and is difficult to form a three-dimensional network structure, resulting in a decrease in the strength and toughness of the color particles, thereby poor flexibility, scrub resistance and temperature change resistance of the coating.

[0131] Comparative Example 2 uses a lower molecular weight hydrophobically modified hydroxyethyl cellulose instead of a high molecular weight hydrophobically modified hydroxyethyl cellulose. The lower molecular weight hydrophobically modified hydroxyethyl cellulose has a shorter molecular chain and forms a simpler three-dimensional network structure, resulting in a decrease in the strength and toughness of the color particles, thereby affecting the flexibility, washability and temperature change resistance of the coating.

[0132] In Comparative Example 3, the pH adjuster uses ammonia water instead of the long-lasting stable AMP-95. Since ammonia water is volatile, the pH stability in the coating becomes poor and the alkalinity decreases. On the one hand, it will lead to incomplete hydroxyl substitution reaction. On the other hand, continued decrease in pH value will cause the reaction to proceed in reverse, affecting the hydrophilicity and anti-bleeding properties of the coating, thereby causing the water resistance of the coating and the appearance of the coating film to deteriorate.

[0133] In Comparative Example 4, no special reaction agent was added, resulting in the inability of the toning base paint to form an effective isolation film with water, and the color particles were miscible with water, causing the paint to bleed and the color points to be unformed. This resulted in a significant decrease in the paint's workability, initial crack resistance, water resistance, flexibility, coating temperature change resistance, stain resistance, scrub resistance, and storage stability.

[0134] In summary, the present invention, through the combined action of high molecular weight hydrophobically modified hydroxyethyl cellulose, special reactants, specific types of pH regulators, and in combination with other components, makes the colorful coating have good anti-bleeding and flexibility, and has comprehensive properties such as initial water resistance, water resistance, alkali resistance, and stain resistance.

[0135] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A multi-colored paint, characterized in that: Including tinted base paint, continuous phase; The toning base paint comprises emulsion, cellulose, pH regulator, special reaction agent, first auxiliary agent and water; The cellulose includes hydrophobically modified hydroxyethyl cellulose; the molecular weight of the hydrophobically modified hydroxyethyl cellulose is greater than or equal to 100,000; The hydrophobically modified hydroxyethyl cellulose includes hydroxyethyl cellulose modified by a hydrophobic monomer; The pH adjuster is selected from at least one of an amine pH adjuster and an organosilicon pH adjuster; The special reactant includes at least one of ketone and aldehyde.

2. The multi-colored paint according to claim 1, characterized in that: The ketone includes at least one of acetone and butanone; and / or the aldehyde includes at least one of propionaldehyde and n-butyraldehyde.

3. The multi-colored paint according to claim 1, characterized in that: The tinted base paint further comprises a filler; and / or the continuous phase comprises an emulsion, bentonite, a pH adjuster, a second auxiliary agent and water.

4. The multi-colored paint according to claim 1 or 3, characterized in that: The emulsion includes silicone-acrylic emulsion; and / or, the first auxiliary agent includes at least one of a wetting agent, a film-forming agent, an antifreeze agent, a preservative, a defoamer, and a thickener; and / or, the second auxiliary agent includes at least one of a film-forming agent, an antifreeze agent, a preservative, a defoamer, and a thickener; and / or, the filler includes at least one of quartz sand, titanium dioxide, and kaolin.

5. The multi-colored paint according to claim 4, characterized in that: The first auxiliary agent includes a wetting agent, a film-forming agent, an antifreeze agent, a preservative, a defoamer and a thickener; the second auxiliary agent includes a film-forming agent, an antifreeze agent, a preservative, a defoamer and a thickener; the filler includes quartz sand, titanium dioxide and kaolin; And in parts by weight, the toning base paint includes 18-45 parts of water, 0.45-1.1 parts of cellulose, 0.18-0.55 parts of pH adjusters, 0.45-1.1 parts of special reaction agents, 0.18-0.45 parts of wetting agents, 0.45-1.1 parts of film-forming aids, 0.18-0.55 parts of antifreeze agents, 9-22 parts of emulsions, 0.05-0.11 parts of preservatives, 0.05-0.11 parts of defoamers, 22-55 parts of quartz sand, 0.9-3.3 parts of titanium dioxide, 7-11 parts of kaolin, and 0.1-0.22 parts of thickeners; The continuous phase includes 55-75 parts of water, 0.45-1.1 parts of bentonite, 0.1-0.22 parts of pH regulator, 1.1-2.0 parts of film-forming aid, 0.45-1.1 parts of antifreeze, 22-38 parts of emulsion, 0.05-0.11 parts of defoamer, 0.1-0.22 parts of thickener and 0.05-0.11 parts of preservative.

6. The multi-colored paint according to claim 1, characterized in that: The multi-colored paint also includes color paste.

7. The multi-colored paint according to any one of claims 5 to 6, characterized in that: The mass ratio of the tinting base paint to the continuous phase is (3.5-8):

2.

8. The method for preparing the multi-color coating according to any one of claims 1 to 7, characterized in that: The following steps are involved: The tinted base paint and the continuous phase are mixed to obtain the multi-colored paint.

9. The preparation method according to claim 8, characterized in that: The following steps are involved: The color-adjusting base paint and color paste are mixed and granulated to obtain color particles; the color particles are mixed with a continuous phase to obtain the colorful paint.

10. Use of the multi-colored coating according to any one of claims 1 to 7 in the field of architecture.

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