A high-toughness multi-color paint resistant to bleeding and a preparation method and application thereof

Abstract

The present invention belongs to the field of coating technology, and particularly relates to a multi-color coating with high toughness and anti-bleeding properties, as well as its preparation method and application. The multi-color coating of the present invention includes a tinting base paint and a continuous phase; the tinting base paint includes an emulsion, cellulose, a pH regulator, a special reaction agent, a 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 with a hydrophobic monomer; the pH regulator is selected from at least one of an amine pH regulator and an organosilicon pH regulator; the special reaction agent includes at least one of a ketone and an aldehyde. The present invention, through the combined action of a special reaction agent, a specific type of cellulose, a specific type of pH regulator, and in combination with other components, enables the multi-color coating to have good comprehensive properties such as anti-bleeding properties, flexibility, initial water resistance, and water resistance, and does not use protective glue, thereby having high production efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coatings, and particularly relates to a high-toughness multi-color paint with anti-bleeding and an application method and application thereof. BACKGROUND

[0002] Traditional building decoration materials, such as natural stone, have a natural texture and colorful appearance, but they are heavy in quality, complex in construction, easy to crack, and unstable in appearance due to environmental factors. At the same time, with the increasing recognition of 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 is gradually decreasing, and stone-like paint emerges as the times require.

[0003] Stone-like paint mainly includes three categories: real stone paint, sand glue paint, and multi-color paint. Traditional real stone paint and sand glue paint have a high dosage (3-5 kg per square), consume a lot of resources, have a general decorative effect, and require high construction requirements and complicated protection. In the process of spraying paint, a high-power air compressor is needed, and the atomization degree is high, which not only wastes electric energy, but also causes environmental pollution and noise pollution. Multi-color paint uses colloid technology and surface treatment technology to extract and wrap liquid water-based resin into a variety of colloidal water-based color particles of different sizes and colors, which are uniformly and stably suspended and dispersed in a special continuous phase water-based emulsion paint. After one-time construction, the finished product can achieve a realistic degree of granite stone pattern effect. At the same time, this multi-color paint is mainly sprayed at a small air pressure, which is energy-saving and environmentally friendly, convenient to construct, and has the characteristics of long-lasting 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, with a very broad development prospect.

[0004] At present, most multi-color paints use protective glue as a boundary, which is cross-linked with cellulose through hydrogen bonds and van der Waals forces to form a card house structure, so that the color particles can be uniformly dispersed in the continuous phase to form multi-color paint. Common protective glue components include sodium pyrophosphate, sodium hexametaphosphate, magnesium aluminum silicate, magnesium lithium silicate, and polyvinyl alcohol. The card house structure formed by cross-linking them with cellulose can increase the production stability, storage stability, and construction stability of multi-color paint, but it can cause small cohesion, poor toughness, and low strength of color particles, leading to the disadvantages of easy breakage, easy paste, and easy color bleeding during mixing and stirring. These drawbacks are particularly evident in water-sand multi-color paint. In actual use, the sprayed multi-color paint may fall off, have a short service life, have large color differences, and cause damage to the human body and the wall surface. In addition, the color particles and protective glue often need to be mixed and pre-processed during preparation, which is complex and tedious, and has low production efficiency.

[0005] Therefore, it is urgent to provide a multi-color paint with good anti-bleeding and toughness, and without protective glue, so as to improve the production efficiency. SUMMARY

[0006] The present application aims to solve one or more technical problems existing in the prior art, and at least provide an advantageous alternative. Specifically, the present application provides a multi-color paint with good anti-bleeding and flexibility, and does not contain protective glue, without mixing color particles and protective glue for pre-processing, and has high production efficiency.

[0007] The inventive concept of the present application: the multi-color paint of the present application comprises a color-tuning base paint and a continuous phase; the color-tuning base paint comprises an emulsion, cellulose, a pH regulator, a special reagent, a first additive 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 type pH regulator and a silicone type pH regulator; and the special reagent comprises at least one of a ketone and an aldehyde.

[0008] Firstly, the free hydroxyl groups of the hydrophobically modified hydroxyethyl cellulose are activated under the alkaline conditions provided by the specific pH regulator, and the special reagent is added to make the two undergo nucleophilic addition reaction, forming ether structure to replace the hydrophilic hydroxyl groups, thereby improving the hydrophobicity of the color-tuning base paint, realizing the immiscibility between the color particles and the continuous phase, and achieving the effect of protective glue-free multi-color paint. The use of protective glue-free paint in the paint not only eliminates the need to dissolve protective glue solids, but also eliminates the need for protective glue processing of the color-tuning base paint, making the preparation process simple and improving the production efficiency; secondly, the above substitution reaction in the present application is fully carried out under alkaline conditions, and the hydrophilic hydroxyl groups are completely replaced, greatly improving the hydrophobicity of the color particles prepared from the color-tuning base paint, reducing the formation of bridging channels such as intermolecular hydrogen bonds between the color particles and the continuous phase, and greatly reducing the color bleeding and color bleeding of the color particles; finally, the present application uses high molecular weight hydrophobically modified hydroxyethyl cellulose in the color-tuning base paint, which has more complex molecular chain unfolding after swelling in water, and the molecular chain is further complicated after the hydroxyl groups are replaced, the molecular chains of cellulose are intertwined with each other, forming a three-dimensional network structure, enhancing the cohesive strength and flexibility of the color dots, making the color particles not easy to break, and improving the problem of easy paste of traditional multi-color paint. In summary, through the combined action of various components, the multi-color paint has good anti-bleeding, flexibility, good appearance, initial anti-cracking, initial water resistance, water resistance, alkali resistance, coating temperature change resistance, stain resistance and other comprehensive performance.

[0009] Therefore, the first aspect of the present application provides an anti-bleeding and high-toughness multi-color paint.

[0010] Specifically, the anti-bleeding and high-toughness multi-color paint comprises a color-tuning 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 with a hydrophobic monomer;

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

[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 includes 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 is grafted with the hydrophobic monomer dodecyl bromide onto ordinary hydroxyethyl cellulose (HEC) using a macromolecular reaction method. Compared to ordinary hydroxyethyl cellulose (HEC), this high-molecular-weight, hydrophobically modified hydroxyethyl cellulose exhibits more complex molecular chain expansion after aqueous thickening, forming denser physical crosslinks within the tinted base paint. This increases the strength and toughness of the color particles, making them less breakable and improving the tendency of traditional multi-color paints to become brittle during application.

[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 application, on the one hand, compared with ordinary hydroxyethyl cellulose, the high molecular weight hydrophobically modified hydroxyethyl cellulose has more complex molecular chains which can fully expand after thickening in water phase, and its hydrophobic groups can combine with the powder and emulsion in the toning base paint to form physical crosslinking, thereby enhancing the toughness and strength of the toning base paint and further improving the toughness and strength of the multicolor paint. On the other hand, compared with ordinary hydroxyethyl cellulose, the high molecular weight hydrophobically modified hydroxyethyl cellulose only retains a small amount of hydroxyl groups as hydrophilic groups, thereby reducing the hydrophilicity of the toning base paint and the color particle bleeding degree. Meanwhile, in the stable alkaline environment provided by the specific type of pH regulator, the hydrogen on the hydroxyl group of the hydrophobically modified hydroxyethyl cellulose is stripped, thereby protonating into an alcohol cation. The alcohol cation is prone to nucleophilic addition with the carbonyl carbon on the special reactant to form an unstable hydroxy aldehyde structure, which is then further dehydrated to form a stable ether structure under alkaline conditions. 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 toning base paint is reduced, the hydrophobicity is enhanced, the color particles and the continuous phase are not mutually soluble, thereby achieving the effect of free protective glue; and the intermolecular hydrogen bonds between the color particles and the continuous phase are reduced, thereby further improving the color particle bleeding and color bleeding. Meanwhile, the hydrophobically modified hydroxyethyl cellulose after nucleophilic addition has a more complex network structure, and the network structures between the cellulose molecules intertwine to form a three-dimensional network, thereby further enhancing the color particle cohesive strength and toughness, making the color particles not easy to break, and further making the multicolor paint have good strength and flexibility.

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

[0025] Preferably, the emulsion comprises a silicone-acrylate emulsion.

[0026] Preferably, the silicone-acrylate emulsion comprises any one or more of Bardol RS-8625 and Bardol RS-3799.

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

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

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

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

[0031] Preferably, the filler comprises at least one of quartz sand, titanium white powder, and kaolin.

[0032] Preferably, the first auxiliary agent comprises a wetting agent, a film-forming auxiliary agent, an anti-freezing agent, a preservative, an antifoaming agent, and a thickening agent; the second auxiliary agent comprises a film-forming auxiliary agent, an anti-freezing agent, a preservative, an antifoaming agent, and a thickening agent; the filler comprises quartz sand, titanium white powder, and kaolin; and the toning base paint comprises, by weight fraction, water 18-45 parts, cellulose 0.45-1.1 parts, a pH adjusting agent 0.18-0.55 parts, a special reaction agent 0.45-1.1 parts, a wetting agent 0.18-0.45 parts, a film-forming auxiliary agent 0.45-1.1 parts, an anti-freezing agent 0.18-0.55 parts, an emulsion 9-22 parts, a preservative 0.05-0.11 parts, an antifoaming agent 0.05-0.11 parts, quartz sand 22-55 parts, titanium white powder 0.9-3.3 parts, kaolin 7-11 parts, and a thickening agent 0.1-0.22 parts.

[0033] The continuous phase comprises water 55-75 parts, bentonite 0.45-1.1 parts, a pH adjusting agent 0.1-0.22 parts, a film-forming auxiliary agent 1.1-2.0 parts, an anti-freezing agent 0.45-1.1 parts, an emulsion 22-38 parts, an antifoaming agent 0.05-0.11 parts, a thickening agent 0.1-0.22 parts, and a preservative 0.05-0.11 parts.

[0034] Further preferably, the toning base paint comprises, by weight fraction, water 20-40 parts, cellulose 0.5-1 part, a pH adjusting agent 0.2-0.5 parts, a special reaction agent 0.5-1 part, a wetting agent 0.2-0.4 part, a film-forming auxiliary agent 0.5-1 part, an anti-freezing agent 0.2-0.5 part, an emulsion 10-20 parts, a preservative 0.05-0.1 part, an antifoaming agent 0.05-0.1 part, quartz sand 25-50 parts, titanium white powder 1-3 parts, kaolin 8-10 parts, and a thickening agent 0.1-0.2 part.

[0035] The continuous phase comprises water 60-70 parts, bentonite 0.5-1 part, a pH adjusting agent 0.1-0.2 part, a film-forming auxiliary agent 1.2-1.8 parts, an anti-freezing agent 0.5-1 part, an emulsion 25-35 parts, an antifoaming agent 0.05-0.1 part, a thickening agent 0.1-0.2 part, and a preservative 0.05-0.1 part.

[0036] Preferably, the wetting agent is an environmentally friendly synthetic alcohol polyoxyethylene ether surfactant, free of APEO and VOC, and has excellent wetting property, water resistance, and color spreading property. Preferably, it is any one or more of wetting agent XY119 from Shanghai Xiangyue, Sankonupo AD504, and Clariant PF20.

[0037] Preferably, the quartz sand includes any one or more of the following: Sae Yu 40-120 mesh crystal white sand, Han Gao 40-120 mesh white sand.

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

[0039] Preferably, the titanium dioxide includes any one or more of the following: Tai O Hua R-216, Heng Smai Altiris 550 titanium dioxide.

[0040] Specifically, the titanium dioxide is a rutile titanium dioxide, which has excellent heat-reflecting and heat-insulating properties and high whiteness, and can provide good hiding power and heat-reflecting and heat-insulating effects for the coating.

[0041] Preferably, the kaolin includes any one or more of the following: Jin Yu ED-80, San Xin SX-80A, Jin Yu DB-80, Heng Yuan HY-T-60.

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

[0043] Specifically, the optional types of the film-forming aid, antifreeze agent, preservative, defoaming agent, and thickening agent in the toning base paint and the same in the continuous phase are consistent.

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

[0045] Preferably, the film-forming aid includes any one or more of the following: Dow COASOL, Run Tai dodecanol ester, Hua Chang Zhi Dian hexadecanol ester, and Dow COASOL 290.

[0046] Preferably, the antifreeze agent includes water-soluble alcohol antifreeze, which can greatly reduce the freezing point of the overall coating after being mixed with water, thereby improving the anti-freezing performance of the coating.

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

[0048] Preferably, the preservative includes a carboxin 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-toxicity, high-efficiency, and broad-spectrum carboxin preservative.

[0049] Preferably, the preservative includes any one or more of the following: Tor LPC1, Haitianmai preservative KFS, and Haitianmai preservative BTE.

[0050] Preferably, the defoaming agent comprises a silicone defoaming agent, which has strong defoaming and foam suppressing properties, and can make the coating film free of residual microbubbles, and make the microbubbles more beautiful, and is suitable for high-viscosity coating for one-time coating.

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

[0052] Preferably, the thickening agent comprises a hydrophobically modified associative alkali-swellable thickening agent, which can improve the medium shear viscosity at a low dosage, and can effectively improve the flowability and leveling property of the coating.

[0053] Preferably, the thickening agent comprises any one or more of Rohm & Haas AR-6159, Rohm & Haas AR-9359, and Dow RM-8W.

[0054] Preferably, the bentonite comprises a polymer-modified bentonite, which has excellent sag resistance, suspension and matting properties, and can provide good support for the sand-containing color particles in the continuous phase, and improve the storage stability of the coating.

[0055] Preferably, the bentonite comprises any one or more of Himonas BENAQUA 4000 and Clariant AT78 bentonite.

[0056] Preferably, the multi-color coating further comprises a color paste.

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

[0058] Preferably, the mass percentage of the color paste in the color-tinting base paint is 0.8-1.2%; further preferably, the mass percentage of the color paste in the color-tinting base paint is 0.9-1.1%; more preferably, the mass percentage of the color paste in the color-tinting base paint is 1%.

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

[0060] Preferably, the multi-color coating further comprises water.

[0061] The second aspect of the present application provides a preparation method of the anti-bleeding high-toughness multi-color coating according to the first aspect of the present application.

[0062] Specifically, the preparation method of the anti-bleeding high-toughness multi-color coating comprises the following steps:

[0063] mixing the toning base paint and the continuous phase to obtain the multicolor paint.

[0064] Preferably, the method for preparing the anti-bleeding high-toughness multicolor paint comprises the following steps:

[0065] mixing the toning base paint and the color paste to obtain color particles; and mixing the color particles and the continuous phase to obtain the multicolor paint.

[0066] Further preferably, the method for preparing the anti-bleeding high-toughness multicolor paint comprises the following steps:

[0067] mixing the toning base paint, the color paste and water to obtain color particles; and mixing the color particles and the continuous phase to obtain the multicolor paint.

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

[0069] Preferably, the granulation is performed by a screw belt, a three-blade paddle or a granulator.

[0070] The third aspect of the present application provides a use of the anti-bleeding high-toughness multicolor paint according to the first aspect of the present application in the field of construction.

[0071] The multicolor paint of the present application is a non-reactive single-component paint, which can be directly applied and dried, has a simple curing principle, is convenient to use, and after being applied on a wall, the solvent gradually volatilizes, the concentration of solid components gradually increases, and finally a dense coating film is formed.

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

[0073] (1) Compared with traditional ordinary hydroxyethyl cellulose, after the high-molecular-weight hydrophobically modified hydroxyethyl cellulose of the present application is thickened in an aqueous phase, the more complex molecular chains inside are fully unfolded, the hydrophobic groups thereof are combined with the powders and emulsions in the toning base paint to form physical crosslinking while locking water molecules, the toughness and strength of the toning base paint are enhanced, and thus the toughness and strength of the multicolor paint can be improved. In addition, the free hydroxyl groups of the hydrophobically modified hydroxyethyl cellulose are activated under the alkaline conditions provided by a specific pH regulator, and a specific reaction agent is added to make the two occur nucleophilic addition reaction, form ether structure to replace hydrophilic hydroxyl groups, thereby improving the hydrophobicity of the toning base paint, realizing the immiscibility between the color particles and the continuous phase, and achieving the effect of protection glue-free multicolor paint. The use of protection glue-free not only does not need to dissolve protection glue solids, but also does not need to process the toning base paint with protection glue, so that the preparation process is simple and the production efficiency is improved.

[0074] (2) The substitution reaction of ether structure substituting hydrophilic hydroxyl group is fully carried out under alkaline conditions, the substitution of hydrophilic hydroxyl group is complete, the hydrophobicity of color particles is greatly improved, the formation of bridging channels such as intermolecular hydrogen bonds with the continuous phase is greatly reduced, the color bleeding and color migration of color particles are greatly reduced, and the color bleeding resistance of the multi-color coating is improved.

[0075] (3) The hydrophobically modified hydroxyethyl cellulose after nucleophilic addition has a more complex network structure, the network structures between cellulose molecules are intertwined to form a three-dimensional network, which further enhances the cohesive strength and toughness of the color particles, so that the color particles are not easy to break, and the problem of easy paste of traditional multi-color coatings can be improved. In summary, through the combined action of the components, the multi-color coating has good color bleeding resistance, 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 skilled in the art more clearly understand the technical solutions described in the present application, the following examples are given for illustration. It should be pointed out that the following examples do not constitute a limitation on the scope of protection required by the present application.

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

[0078] The raw material components and amounts of the toning base paint and continuous phase in the multi-color coating with color bleeding resistance and high toughness of the embodiments 1-3 of the present application are shown in Table 1.

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

[0080]

[0081]

[0082] Embodiment 1

[0083] A multi-color coating with color bleeding resistance and high toughness, consisting of 65 parts by weight of toning base paint, 25 parts by weight of continuous phase, 10 parts by weight of deionized water, and 0.65 parts by weight of inorganic color paste (mass ratio of iron red, iron yellow and iron black is 1:1:1).

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

[0085] The preparation method of the multi-color coating with color bleeding resistance and high toughness comprises the following steps:

[0086] (1) Put the toning base paint into the container, add the inorganic color paste for toning at a rotation speed of 400 rpm to obtain the colored base paint;

[0087] (2) Put deionized water into the mixing container, and add the colored base paint obtained in step (1), use the granulator for granulation to obtain the color granules;

[0088] (3) Under the stirring state, put the continuous phase into the color granules obtained in step (2), stir uniformly to obtain the anti-color-bleeding high-toughness multi-color paint.

[0089] The preparation process of the toning base paint comprises the following steps:

[0090] Put deionized water into the reaction container, disperse the cellulose at a rotation speed of 700 rpm for 5 min, add the pH regulator, and continue to disperse until it becomes a translucent viscous liquid; adjust the rotation speed to 900 rpm, and sequentially add the wetting agent, film-forming aid, antifreezing agent, defoaming agent, and preservative, and add titanium white and kaolin, and disperse at high speed until the fineness is ≤50 μm; finally, under the stirring state, sequentially add the emulsion, quartz sand, and thickening agent, stir uniformly, slowly add the special reaction agent, adjust the rotation speed to 400 rpm, and stir for 15 min to obtain the toning base paint.

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

[0092] Put deionized water into the reaction container, disperse the bentonite at a rotation speed of 1000 rpm until it becomes a translucent viscous liquid; then adjust the rotation speed to 600 rpm, and sequentially add the pH regulator, film-forming aid, antifreezing agent, defoaming agent, preservative, emulsion, and thickening agent, and stir uniformly to obtain the continuous phase.

[0093] Example 2

[0094] An anti-color-bleeding high-toughness multi-color paint, which is composed of 60 parts of toning base paint, 30 parts of continuous phase, 10 parts of deionized water, and 0.60 parts of inorganic color paste (the mass ratio of iron red, iron yellow, and iron black is 1:1:1).

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

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

[0097] Example 3

[0098] A high-toughness multicolor paint with anti-bleeding color, which is composed of 70 parts of a color-mixing base paint, 20 parts of a continuous phase, 10 parts of deionized water, and 0.70 parts of inorganic color paste (mass ratio of iron red, iron yellow, and iron black is 1:1:1) by weight.

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

[0100] The preparation method of the high-toughness multicolor paint with anti-bleeding color in Example 3 is the same as that in Example 1.

[0101] Comparative Example 1

[0102] Comparative Example 1 differs from Example 1 only in that the color-mixing base paint in Comparative Example 1 uses ordinary hydroxyethyl cellulose (Enze Chemical 250HBR hydroxyethyl cellulose) instead of the high-molecular-weight hydrophobically modified hydroxyethyl cellulose in Example 1, and the rest is the same as in Example 1.

[0103] Comparative Example 2

[0104] Comparative Example 2 differs from Example 1 in that the color-mixing base paint in Comparative Example 2 uses a lower-molecular-weight hydrophobically modified hydroxyethyl cellulose (Ashland Cellulose HE3KB, molecular weight of HE3KB is 30000) instead of the high-molecular-weight hydrophobically modified hydroxyethyl cellulose (molecular weight of Ashland HE-10K is 100000) in Example 1, and the rest is the same as in Example 1.

[0105] Comparative Example 3

[0106] Comparative Example 3 differs from Example 1 in that the color-mixing base paint in Comparative Example 3 uses ammonia instead of AMP-95 in Example 1 to provide a basic environment, and the rest is the same as in Example 1.

[0107] Comparative Example 4

[0108] Comparative Example 4 differs from Example 1 in that the color-mixing base paint in Comparative Example 4 uses deionized water instead of the special reagent in Example 1, i.e., does not contain the special reagent, and the rest is the same as in Example 1.

[0109] Performance Test

[0110] The high-toughness multicolor paint with anti-bleeding color prepared in Examples 1-3 and Comparative Examples 1-4 was tested for relevant performance, and the test items and test methods are as follows:

[0111] Workability: tested according to the method of HGT 4343-2024 Waterborne Multicolor Architectural Coatings 6.5.8 Workability;

[0112] Drying time (tack-free): tested according to the method of 6.5.5 drying time in HGT 4343-2024 water-based multicolor architectural coatings;

[0113] Initial anti-cracking property: tested according to the method of 6.5.6 initial drying anti-cracking property in HGT 4343-2024 water-based multicolor architectural coatings;

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

[0115] Coating film appearance: tested according to the method of 6.5.9 coating film appearance in HGT 4343-2024 water-based multicolor architectural coatings;

[0116] Water resistance: tested according to the method of 6.5.13 water resistance in HGT 4343-2024 water-based multicolor architectural coatings;

[0117] Alkali resistance: tested according to the method of 6.5.12 alkali resistance in HGT 4343-2024 water-based multicolor architectural coatings;

[0118] Flexibility: tested according to the method of 6.5.15 flexibility in HGT 4343-2024 water-based multicolor architectural coatings;

[0119] Coating temperature change resistance: tested according to the method of 6.5.17 coating temperature change resistance in HGT 4343-2024 water-based multicolor architectural coatings;

[0120] Stain resistance: tested according to the method of 6.5.18 stain resistance in HGT 4343-2024 water-based multicolor architectural coatings;

[0121] Anti-bleeding property: ① tested according to the method of 6.5.3 heat storage stability in HGT 4343-2024 water-based multicolor architectural coatings; ② tested according to the method of 6.5.4 low temperature stability in HGT 4343-2024 water-based multicolor architectural coatings; after the paint is stored for a specified time, the continuous phase coloring is observed visually, and no color paste coloring is judged to be qualified;

[0122] Color point flexibility: tested according to the method of 5.4.9 washability resistance in HGT 4343-2012 water-based multicolor architectural coatings; the number of washes when the coating is damaged is used as the basis for judgment, and the higher the number of washes, the better the color point flexibility.

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

[0124] Table 2: Performance test results of the multicolor coatings of Examples 1-3

[0125]

[0126]

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

[0128]

[0129] As can be seen from Table 2, the multicolor coating of the present application has good workability, surface drying time, initial anti-cracking property and coating film appearance. The present application selects a high molecular weight hydrophobically modified hydroxyethyl cellulose in the toning base paint, increases the hydrophobicity of the color particles, and endows the coating with excellent initial water resistance, water resistance, alkali resistance, stain resistance and anti-bleeding property. At the same time, by adding a special reaction agent, replacing the hydrophilic hydroxyl groups of cellulose, the molecular chain is further complicated and cross-linked to form a three-dimensional network structure, enhancing the anti-bleeding property and strength and toughness of the color particles, and endowing the coating with excellent flexibility, coating temperature change resistance and color point toughness. In addition, the multicolor coating of the present application is free of protective glue, compared with the traditional multicolor manufacturing process, it eliminates the production of protective glue solution and the mixing process of color particles and protective glue, which can reduce the production and manufacturing time by 20%, and has high production efficiency.

[0130] In Comparative Example 1, ordinary hydroxyethyl cellulose is used instead of high molecular weight hydrophobically modified hydroxyethyl cellulose, on the one hand, the hydrophilic hydroxyl groups of the toning base paint are too much, the substitution reaction of the hydrophilic hydroxyl groups is incomplete, the hydrophilicity of the toning base paint is increased, leading to poor anti-bleeding property, water resistance and stain resistance. On the other hand, the ordinary hydroxyethyl cellulose has a short molecular chain, and it is difficult to form a three-dimensional network structure, leading to a decrease in the strength and toughness of the color particles, and thus poor flexibility, washability and coating temperature change resistance.

[0131] In Comparative Example 2, a lower molecular weight hydrophobically modified hydroxyethyl cellulose is used instead of high molecular weight hydrophobically modified hydroxyethyl cellulose. The lower molecular weight hydrophobically modified hydroxyethyl cellulose has a shorter molecular chain, and the three-dimensional network structure formed is relatively simple, leading to a decrease in the strength and toughness of the color particles, and thus affecting the flexibility, washability and coating temperature change resistance of the coating.

[0132] In Comparative Example 3, ammonia is used instead of long-acting stable AMP-95 as the pH adjuster. Since ammonia is volatile, the pH stability of the coating is poor and the alkalinity is reduced, on the one hand, the hydroxyl substitution reaction is incomplete, and on the other hand, the decrease in pH value leads to a reverse reaction, affecting the hydrophilicity and anti-bleeding property of the coating, and thus leading to poor water resistance and coating film appearance.

[0133] The comparative example 4 does not add a special reaction agent, which results in that the toning base paint cannot form an effective isolation film with water, the color particles are miscible with water, the paint appears bleeding, and the color points are not shaped. The construction, initial anti-cracking, water resistance, flexibility, coating temperature change resistance, stain resistance, washability and storage stability of the paint are all greatly reduced.

[0134] In summary, the multi-color paint has good anti-bleeding, flexibility, and comprehensive performance of initial water resistance, water resistance, alkali resistance, and stain resistance by the combined action of the high molecular weight hydrophobically modified hydroxyethyl cellulose, the special reaction agent, and the specific type of pH regulator, and in combination with other components.

[0135] The above examples are only used to illustrate the technical solutions of the present application, but not to limit the protection scope of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the essence and scope of the present application.

Claims

1. A multi-colored paint, characterized in that: Including tinted base paint and 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 is selected from any one or two of Aksu EHM500 and Ashland HE-10K; The pH regulator is an amine pH regulator; The special reactant includes at least one of a ketone and an aldehyde; The ketone is selected from at least one of acetone and butanone; The aldehyde is selected from at least one of propionaldehyde and n-butyraldehyde.

2. 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.

3. The multi-colored paint according to claim 2, characterized in that: The emulsion includes a 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 defoaming agent, and a thickener; and / or the second auxiliary agent includes at least one of a film-forming agent, an antifreeze agent, a preservative, a defoaming agent, and a thickener; and / or the filler includes at least one of quartz sand, titanium dioxide, and kaolin.

4. The multi-colored paint according to claim 3, 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; The tinted base paint comprises, by weight, 18-45 parts of water, 0.45-1.1 parts of cellulose, 0.18-0.55 parts of a pH adjuster, 0.45-1.1 parts of a special reaction agent, 0.18-0.45 parts of a wetting agent, 0.45-1.1 parts of a film-forming aid, 0.18-0.55 parts of an antifreeze agent, 9-22 parts of an emulsion, 0.05-0.11 parts of a preservative, 0.05-0.11 parts of a defoaming agent, 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 a thickener; 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.

5. The multi-colored paint according to claim 1, characterized in that: The multi-colored paint further comprises a color paste.

6. The multi-colored paint according to any one of claims 4 to 5, characterized in that: The mass ratio of the tinted base paint to the continuous phase is (3.5-8):

2.

7. The method for preparing the multi-colored coating according to claim 5, characterized in that: The following steps are involved: The color-adjusting base paint and the color paste are mixed and granulated to obtain color particles; and the color particles are mixed with a continuous phase to obtain the colorful paint.

8. Use of the multi-colored coating according to any one of claims 1 to 6 in the field of architecture.

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