Water-based bi-component color paste with long-acting activation period and preparation method of water-based bi-component color paste

Abstract

The invention relates to the technical field of water-based paint, and particularly discloses water-based two-component color paste with a long-acting activation period and a preparation method of the water-based two-component color paste. The water-based bi-component color paste with the long-acting activation period comprises a component A and a component B. The component B comprises the following raw materials in parts by weight: 60-80 parts of isocyanate and 20-40 parts of a diluent, and the raw materials of the component A comprise a hydroxyl acrylic acid dispersion, deionized water and a functional auxiliary agent; the hydroxy acrylic dispersion comprises the following raw materials in parts by weight: 0.5-1.5 parts of an initiator, 10-20 parts of a solvent, 30-40 parts of an acrylic monomer, 1-3 parts of a neutralizer, 60-90 parts of water, 1-3 parts of tridecanol polyoxyethylene ether and 1-3 parts of a silane coupling agent. Through the synergistic effect of all the components, the activation period of the color paste is effectively prolonged, and the gloss durability of a paint film and the storage stability of the color paste are improved.

Description

Technical Field

[0001] The present application relates to the technical field of water-based coatings, and in particular to a water-based two-component color paste with a long activation period and a preparation method thereof. Background Art

[0002] Water-based coatings are highly sought after for their environmental friendliness, but most water-based two-component colorants on the market suffer from a short pot life. Once this period has expired, the colorant's stability decreases, impacting the coating's appearance. Two-component water-based paint colorants are often composed of a water-based hydroxylated acrylic resin and an isocyanate curing agent. Based on the preparation process, water-based hydroxylated acrylic resins can be categorized into hydroxylated acrylic latexes and hydroxylated acrylic dispersions.

[0003] Hydroxylated acrylic latex has a high molecular weight, can form a film on its own, dries quickly at room temperature, and has a simple synthesis process and low cost. However, hydroxylated acrylic latex has poor compatibility with curing agents, resulting in low gloss and fullness in the resulting coatings, and poor decorative appearance. Residual emulsifiers in the system also affect the durability of the coating, further hindering the application of hydroxylated acrylic latex in water-based paint pastes. However, current hydroxylated acrylic dispersions suffer from a short pot life, resulting in rapid degradation of the coating's appearance and performance, and low paste stability. Summary of the Invention

[0004] In order to improve the activation period stability of existing water-based two-component color pastes, the present application provides a water-based two-component color paste with a long activation period and a preparation method thereof.

[0005] In the first aspect, the present application provides a water-based two-component color paste with a long activation period, adopting the following technical solution: a water-based two-component color paste with a long activation period, comprising component A and component B, wherein the component B comprises the following raw materials in parts by weight: 60-80 parts of isocyanate and 20-40 parts of diluent, and the raw materials of the component A comprise hydroxy acrylic dispersion, deionized water and functional additives; the hydroxy acrylic dispersion comprises the following raw materials in parts by weight: 0.5-1.5 parts of initiator, 10-20 parts of solvent, 30-40 parts of acrylic monomer, 1-3 parts of neutralizer, 60-90 parts of water, 1-3 parts of tridecyl alcohol polyoxyethylene ether, and 1-3 parts of silane coupling agent.

[0006] By adopting the above technical solution, the addition of tridecanol polyoxyethylene ether and a silane coupling agent to the raw material of the hydroxylated acrylic dispersion can regulate the viscosity of the hydroxylated acrylic dispersion. The tridecanol polyoxyethylene ether can reduce the particle size of the hydroxylated acrylic dispersion. The tridecanol polyoxyethylene ether is dispersed and coated on the surface of the dispersion particles, which can encapsulate the dispersion and the isocyanate, thereby enhancing the stability and activation durability of the water-based two-component color paste, reducing the phenomenon of demulsification of the water-based two-component color paste, and maintaining a good gloss and durability of the paint film. The addition of the silane coupling agent to the raw material of the hydroxylated acrylic dispersion can effectively combine the inorganic and organic materials in the dispersion, enhance the compatibility of organic matter and polymer, improve the storage stability of the hydroxylated acrylic dispersion, and reduce the phenomenon of stratification of the hydroxylated acrylic dispersion. At the same time, the silane coupling agent can enhance the adhesion of the water-based two-component color paste to the substrate, thereby improving the durability and adhesion performance of the water-based two-component color paste.

[0007] Preferably, the diluent is propylene glycol methyl ether acetate, and the isocyanate is hexamethylene diisocyanate.

[0008] By adopting the above technical solution, propylene glycol methyl ether acetate can slowly evaporate after the application of the water-based two-component color paste, regulating the slow increase in the viscosity of the water-based two-component color paste system and extending the activation period of the water-based two-component color paste. Propylene glycol methyl ether acetate has good compatibility with component A and can promote the uniform dispersion of components A and B, but will not over-penetrate and destroy the stability of the dispersion in component A. Hexamethylene diisocyanate has a fatty chain structure, which can promote good yellowing resistance and weather resistance of the cured paint film. Hexamethylene diisocyanate has moderate reactivity and can combine with propylene glycol methyl ether acetate to further extend the activation period of the water-based two-component color paste. Propylene glycol methyl ether acetate can ensure that hexamethylene diisocyanate is fully mixed with component A, avoiding the phenomenon of localized uneven crosslinking in the color paste system caused by excessively high viscosity of hexamethylene diisocyanate.

[0009] Preferably, the acrylic monomers include styrene, butyl methacrylate, acrylic acid, butyl acrylate, hydroxyethyl acrylate, and hydroxyethyl methacrylate.

[0010] Preferably, the mass ratio of styrene, butyl methacrylate, acrylic acid, butyl acrylate, hydroxyethyl acrylate and hydroxyethyl methacrylate is (5-8):(5-8):(3-5):(8-10):(5-8):10.

[0011] Preferably, the functional additives include cosolvents, dispersants, wetting agents, leveling agents, thixotropic agents, pH regulators, defoamers, thickeners, bactericides, stabilizers, barium sulfate, and pigments.

[0012] By adopting the above technical solution, through the synergistic combination of various additives, the stability of the paint film is improved, the storage stability and construction stability of the color paste are enhanced, and the activation period of the color paste is extended.

[0013] Preferably, the A component includes the following raw materials in parts by weight: 50-70 parts of hydroxy acrylic dispersion, 10-15 parts of deionized water, 5-10 parts of cosolvent, 0.3-2 parts of dispersant, 0.2-1 parts of wetting agent, 0.2-1 parts of leveling agent, 0.1-1 parts of thixotropic agent, 0.1-1 parts of pH regulator, 0.1-1 parts of defoaming agent, 0.1-1 parts of bactericide, 0.5-5 parts of stabilizer, 0.3-5 parts of thickener, 5-15 parts of barium sulfate, and 15-30 parts of pigment.

[0014] Preferably, the cosolvent is diethylene glycol butyl ether.

[0015] By adopting the above technical solution, diethylene glycol butyl ether can have good compatibility with water, hydroxy acrylic dispersion, and isocyanate, reduce the local concentration of NCO groups, slow down the reaction rate of isocyanate and component A, extend the gel time of the water-based two-component color paste, extend the activation period of the water-based two-component color paste, and reduce bubbles and shrinkage holes caused by the overly rapid reaction of the water-based two-component color paste.

[0016] In a second aspect, the present application provides a method for preparing a water-based two-component color paste with a long activation period, using the following technical solution: A method for preparing a water-based two-component color paste with a long activation period comprises the following specific steps: The solvent is preheated, and then an initiator, acrylic monomer, water, tridecanol polyoxyethylene ether and a silane coupling agent are added and mixed, and the mixture is kept warm for reaction. After cooling, a neutralizing agent is added and mixed evenly, and finally dispersed with water to obtain a hydroxy acrylic acid dispersion; The hydroxy acrylic acid dispersion, deionized water and functional additives are uniformly mixed to obtain component A, the isocyanate and the diluent are mixed to obtain component B, and then the components A and B are mixed to prepare a water-based two-component color paste with a long activation period.

[0017] By adopting the above technical solution, the prepared water-based two-component color paste has a long activation period under the synergistic effect of each component, good viscosity stability, is easy to construct, and the paint film has good gloss after drying.

[0018] Preferably, the solvent heating temperature is 140-145°C, and the cooling temperature is 80-90°C.

[0019] Preferably, the method comprises the following specific steps: The solvent is preheated, and then an initiator, acrylic monomer, water, tridecanol polyoxyethylene ether and a silane coupling agent are added and mixed, and the mixture is kept warm for reaction. After cooling, a neutralizing agent is added and mixed evenly, and finally dispersed with water to obtain a hydroxy acrylic acid dispersion; The hydroxy acrylic dispersion, deionized water, cosolvent, dispersant, wetting agent, leveling agent, thixotropic agent, defoaming agent, thickener, bactericide, stabilizer, barium sulfate and pigment are uniformly mixed, and finally a pH adjuster is added to obtain component A. The isocyanate and the diluent are mixed to obtain component B. Components A and B are then mixed to prepare a water-based two-component color paste with a long activation period.

[0020] In summary, this application has the following beneficial effects: 1. This application utilizes the addition of tridecanol polyoxyethylene ether and a silane coupling agent to the hydroxylated acrylic dispersion raw material to encapsulate the dispersion and isocyanate, thereby enhancing the storage stability and pot life of the waterborne two-component colorant, reducing demulsification, and maintaining a good gloss and durability of the paint film. The silane coupling agent enhances the compatibility of organic matter and polymers, improving the storage stability of the waterborne two-component colorant.

[0021] 2. In this application, propylene glycol methyl ether acetate is used to promote the full mixing of hexamethylene diisocyanate and component A. At the same time, propylene glycol methyl ether acetate can slowly evaporate after the construction of the water-based two-component color paste, thereby extending the activation period of the water-based two-component color paste, improving the dispersibility of the water-based two-component color paste system, and reducing the phenomenon of uneven local cross-linking in the water-based two-component color paste system. DETAILED DESCRIPTION

[0022] The present application is further described in detail below with reference to the embodiments.

[0023] All raw materials in the examples are commercially available.

[0024] Preparation Example Preparation Example 1 The hydroxylated acrylic dispersion comprises the following raw materials in parts by weight: 1 kg of initiator, 15 kg of solvent, 35 kg of acrylic monomers, 2 kg of neutralizer, 75 kg of water, 2 kg of tridecanol polyoxyethylene ether, and 2 kg of silane coupling agent. The initiator is tert-butyl peroxybenzoate, the solvent is propylene glycol methyl ether, the neutralizer is N,N-dimethylethanolamine, the tridecanol polyoxyethylene ether is AEO-13, and the silane coupling agent is γ-methacryloyloxypropyltrimethoxysilane. The acrylic monomers include styrene, butyl methacrylate, acrylic acid, butyl acrylate, hydroxyethyl acrylate, and hydroxyethyl methacrylate, with the mass ratio of styrene, butyl methacrylate, acrylic acid, butyl acrylate, hydroxyethyl acrylate, and hydroxyethyl methacrylate being 6:7:4:9:6.5:10.

[0025] The preparation method of the hydroxylated acrylic acid dispersion comprises the following specific steps: After heating the solvent to 143°C, the initiator, acrylic monomer, water, tridecanol polyoxyethylene ether and silane coupling agent were added and mixed, and the mixture was kept warm for 5 hours. The mixture was then cooled to 85°C, a neutralizer was added and mixed evenly, and the mixture was kept warm for 10 minutes. Finally, the mixture was dispersed with water to obtain a hydroxy acrylic acid dispersion.

[0026] Preparation Example 2 The difference between Preparation Example 2 and Preparation Example 1 is that the amount of initiator used in the hydroxy acrylic acid dispersion raw material is 0.5 kg, the amount of solvent used is 10 kg, the amount of acrylic monomer used is 30 kg, the amount of neutralizer used is 1 kg, the amount of water used is 60 kg, the amount of tridecyl alcohol polyoxyethylene ether used is 1 kg, and the amount of silane coupling agent used is 3 kg.

[0027] Preparation Example 3 The difference between Preparation Example 3 and Preparation Example 1 is that the amount of initiator used in the hydroxy acrylic acid dispersion raw material is 1.5 kg, the amount of solvent used is 20 kg, the amount of acrylic monomer used is 40 kg, the amount of neutralizer used is 3 kg, the amount of water used is 90 kg, the amount of tridecyl alcohol polyoxyethylene ether used is 3 kg, and the amount of silane coupling agent used is 1 kg.

[0028] Preparation Example 4 The difference between Preparation Example 4 and Preparation Example 1 is that the mass ratio of styrene, butyl methacrylate, acrylic acid, butyl acrylate, hydroxyethyl acrylate, and hydroxyethyl methacrylate in the raw materials of the hydroxy acrylic acid dispersion is 5:8:3:10:5:10.

[0029] Preparation Example 5 The difference between Preparation Example 5 and Preparation Example 1 is that the mass ratio of styrene, butyl methacrylate, acrylic acid, butyl acrylate, hydroxyethyl acrylate, and hydroxyethyl methacrylate in the raw materials of the hydroxy acrylic acid dispersion is 8:5:5:8:8:10.

[0030] Preparation Example 6 The difference between Preparation Example 6 and Preparation Example 1 is that an equal amount of acrylic monomer is used in the raw material of the hydroxy acrylic acid dispersion instead of tridecanol polyoxyethylene ether.

[0031] Preparation Example 7 The difference between Preparation Example 7 and Preparation Example 1 is that an equivalent amount of acrylic monomer is not used in the raw material of the hydroxy acrylic acid dispersion to replace the silane coupling agent. Example

[0032] Example 1 This embodiment provides a water-based two-component color paste with a long activation period, including component A and component B, component B includes the following raw materials in parts by weight: 70 kg of isocyanate and 30 kg of diluent, and component A includes the following raw materials in parts by weight: 60 kg of hydroxylated acrylic acid dispersion, 13 kg of deionized water, and 8 kg of functional additives; wherein the hydroxylated acrylic acid dispersion is derived from Preparation Example 1, the functional additive is the cosolvent diethylene glycol butyl ether, the isocyanate is hexamethylene diisocyanate, and the diluent is propylene glycol methyl ether acetate.

[0033] The preparation method of a water-based two-component color paste with a long activation period comprises the following specific steps: The hydroxy acrylic acid dispersion, deionized water and functional additives are uniformly mixed to obtain component A, the isocyanate and the diluent are mixed to obtain component B, and then the components A and B are mixed to prepare a water-based two-component color paste with a long activation period.

[0034] Example 2 The difference between Example 2 and Example 1 is that the amount of isocyanate used in the raw material of component B is 60 kg, and the amount of diluent used is 30 kg.

[0035] Example 3 The difference between Example 3 and Example 1 is that the amount of isocyanate used in the raw material of component B is 80 kg, and the amount of diluent used is 20 kg.

[0036] Example 4 The difference between Example 4 and Example 1 is that the functional additives in the raw materials of component A include a cosolvent, a dispersant, a wetting agent, a leveling agent, a thixotropic agent, a pH regulator, a defoamer, a thickener, a bactericide, a stabilizer, barium sulfate, and a pigment; component A includes the following raw materials in parts by weight: 60 kg of hydroxy acrylic dispersion, 13 kg of deionized water, 8 kg of cosolvent, 1.5 kg of dispersant, 0.6 kg of wetting agent, 0.6 kg of leveling agent, 0.5 kg of thixotropic agent, 0.5 kg of pH regulator, 0.5 kg of defoamer, 0.5 kg of bactericide, 3 kg of stabilizer, 3 kg of thickener, 10 kg of barium sulfate, and 22 kg of pigment. The thixotropic agent is fumed silica, the pigment is rutile titanium dioxide, the wetting agent is BYK-346, the defoaming agent is BYK-028, the leveling agent is BYK-333, the pH adjuster is AMP-95, the bactericide is isothiazolinone, the thickener is Dow RM-2020, and the stabilizer is BASF antioxidant 1010.

[0037] The preparation method of a water-based two-component color paste with a long-lasting activation period comprises the following specific steps: Barium sulfate and pigment are mixed and ground in advance to an average particle size of 10 μm, and then hydroxy acrylic acid dispersion, deionized water, cosolvent, dispersant, wetting agent, leveling agent, thixotropic agent, defoaming agent, thickener, bactericide, and stabilizer are added and mixed evenly, and finally a pH regulator is added and mixed to obtain component A, and isocyanate and diluent are mixed evenly to obtain component B, and then components A and B are mixed to obtain a water-based two-component color paste with a long activation period.

[0038] Example 5 The difference between Example 5 and Example 4 is that component A includes the following raw materials in parts by weight: 50 kg of hydroxy acrylic dispersion, 10 kg of deionized water, 10 kg of cosolvent, 0.3 kg of dispersant, 0.2 kg of wetting agent, 1 kg of leveling agent, 1 kg of thixotropic agent, 0.1 kg of pH regulator, 1 kg of defoamer, 0.1 kg of bactericide, 0.5 kg of stabilizer, 0.3 kg of thickener, 15 kg of barium sulfate, and 15 kg of pigment.

[0039] Example 6 The difference between Example 6 and Example 4 is that component A includes the following raw materials in parts by weight: 70 kg of hydroxy acrylic dispersion, 15 kg of deionized water, 5 kg of cosolvent, 2 kg of dispersant, 1 kg of wetting agent, 0.2 kg of leveling agent, 0.1 kg of thixotropic agent, 1 kg of pH regulator, 0.1 kg of defoaming agent, 1 kg of bactericide, 5 kg of stabilizer, 5 kg of thickener, 5 kg of barium sulfate, and 30 kg of pigment.

[0040] Example 7 The difference between Example 7 and Example 4 is that the hydroxy acrylic acid dispersion in the raw material of component A comes from Preparation Example 2.

[0041] Example 8 The difference between Example 8 and Example 4 is that the hydroxy acrylic acid dispersion in the raw material of component A comes from Preparation Example 3.

[0042] Example 9 The difference between Example 9 and Example 4 is that the hydroxy acrylic acid dispersion in the raw material of component A comes from Preparation Example 4.

[0043] Example 10 The difference between Example 10 and Example 4 is that the hydroxy acrylic acid dispersion in the raw material of component A comes from Preparation Example 5.

[0044] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that the hydroxy acrylic acid dispersion in the raw material of component A comes from Preparation Example 6.

[0045] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that the hydroxy acrylic acid dispersion in the raw material of component A comes from Preparation Example 7.

[0046] Performance testing The following performance tests were conducted on the water-based two-component color pastes with long activation periods provided in Examples 1-10 and Comparative Examples 1-2 of the present application. The specific test results are shown in Table 1.

[0047] Detection method 1. Storage stability The component A sample prepared in this application was placed in an 80 mL transparent plastic bottle, sealed, and stored in a constant temperature oven at (50±2)°C for 30 days, and the changes in the appearance of the sample were observed.

[0048] 2. Viscosity Referring to GB / T 2794-2013 "Determination of viscosity of adhesives", the viscosity of the hydroxylated acrylic dispersion after 5 hours of storage was measured.

[0049] 3. Paint film test The long-lasting, water-based, two-component color paste prepared in this application was sprayed onto steel panels. After surface drying, the paint film was baked at 85°C for 30 minutes, achieving an average film thickness of 30 μm. The gloss of the paint film at 60° was measured using a gloss meter. The paint film hardness was tested according to GB / T 6739-2022, "Paints and varnishes: Determination of film hardness by pencil method." Adhesion was tested according to GB / T 1720-1920, "Paint film circle test."

[0050] Table 1: Performance test results data table The performance test results show that the hydroxylated acrylic dispersion prepared in this application has good storage stability. After being placed for a period of time, the viscosity of the hydroxylated acrylic dispersion increases slowly, thereby extending the activation period and gloss durability of the water-based two-component color paste. By comparing Comparative Examples 1-2 with Example 1, it can be seen that in Comparative Example 1, tridecanol polyoxyethylene ether is not used, and the storage performance of the hydroxylated acrylic dispersion prepared is significantly reduced, and the gloss of the paint film is also affected. In Comparative Example 2, no silane coupling agent is used. As shown in the performance test results, the storage performance and adhesion ability of the water-based two-component color paste are greatly reduced, further illustrating that the silane coupling agent can effectively fit the inorganic and organic materials in the dispersion together, enhance the compatibility of organic matter and polymers, reduce the occurrence of stratification, and enhance the adhesion effect of the water-based two-component color paste.

[0051] By comparing Examples 4-7 with Example 1, it can be seen that adding an appropriate amount of functional additives to the water-based two-component color paste raw materials can further improve the storage stability and activation period of the color paste and enhance the stability of the paint film.

[0052] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A water-based two-component color paste with a long activation period, characterized in that: The invention comprises component A and component B, wherein the component B comprises the following raw materials in parts by weight: 60-80 parts of isocyanate and 20-40 parts of diluent; the raw materials of component A comprise hydroxy acrylic acid dispersion, deionized water and functional additives; the hydroxy acrylic acid dispersion comprises the following raw materials in parts by weight: 0.5-1.5 parts of initiator, 10-20 parts of solvent, 30-40 parts of acrylic monomer, 1-3 parts of neutralizer, 60-90 parts of water, 1-3 parts of tridecanol polyoxyethylene ether and 1-3 parts of silane coupling agent.

2. The aqueous two-component color paste with a long active period according to claim 1, characterized in that: The diluent is propylene glycol methyl ether acetate, and the isocyanate is hexamethylene diisocyanate.

3. The aqueous two-component color paste with a long active period according to claim 1, characterized in that: The acrylic monomers include styrene, butyl methacrylate, acrylic acid, butyl acrylate, hydroxyethyl acrylate, and hydroxyethyl methacrylate.

4. The aqueous two-component color paste with a long active period according to claim 3, characterized in that: The mass ratio of styrene, butyl methacrylate, acrylic acid, butyl acrylate, hydroxyethyl acrylate and hydroxyethyl methacrylate is (5-8): (5-8): (3-5): (8-10): (5-8):

10.

5. The aqueous two-component color paste with a long active period according to claim 1, characterized in that: The functional additives include cosolvents, dispersants, wetting agents, leveling agents, thixotropic agents, pH regulators, defoamers, thickeners, bactericides, stabilizers, barium sulfate, and pigments.

6. The aqueous two-component color paste with a long active period according to claim 5, characterized in that: The component A includes the following raw materials in parts by weight: 50-70 parts of hydroxy acrylic dispersion, 10-15 parts of deionized water, 5-10 parts of cosolvent, 0.3-2 parts of dispersant, 0.2-1 parts of wetting agent, 0.2-1 parts of leveling agent, 0.1-1 parts of thixotropic agent, 0.1-1 parts of pH regulator, 0.1-1 parts of defoaming agent, 0.1-1 parts of bactericide, 0.5-5 parts of stabilizer, 0.3-5 parts of thickener, 5-15 parts of barium sulfate, and 15-30 parts of pigment.

7. The aqueous two-component color paste with a long active period according to claim 6, characterized in that: The cosolvent is diethylene glycol butyl ether.

8. A method for preparing a water-based two-component color paste with a long-lasting active period according to any one of claims 1 to 7, characterized in that: The specific steps include: The solvent is preheated, and then an initiator, acrylic monomer, water, tridecanol polyoxyethylene ether and a silane coupling agent are added and mixed, and the mixture is kept warm for reaction. After cooling, a neutralizing agent is added and mixed evenly, and finally dispersed with water to obtain a hydroxy acrylic acid dispersion; The hydroxy acrylic acid dispersion, deionized water and functional additives are uniformly mixed to obtain component A, the isocyanate and the diluent are mixed to obtain component B, and then the components A and B are mixed to prepare a water-based two-component color paste with a long activation period.

9. The method for preparing a water-based two-component color paste with a long-lasting activation period according to claim 8, characterized in that: The solvent heating temperature is 140-145°C, and the cooling temperature is 80-90°C.

10. The method for preparing a water-based two-component color paste with a long-lasting activation period according to claim 8, characterized in that: The specific steps include: The solvent is preheated, and then an initiator, acrylic monomer, water, tridecanol polyoxyethylene ether and a silane coupling agent are added and mixed, and the mixture is kept warm for reaction. After cooling, a neutralizing agent is added and mixed evenly, and finally dispersed with water to obtain a hydroxy acrylic acid dispersion; The hydroxy acrylic dispersion, deionized water, cosolvent, dispersant, wetting agent, leveling agent, thixotropic agent, defoaming agent, thickener, bactericide, stabilizer, barium sulfate and pigment are uniformly mixed, and finally a pH adjuster is added to obtain component A. The isocyanate and the diluent are mixed to obtain component B. Components A and B are then mixed to prepare a water-based two-component color paste with a long activation period.

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