Long-acting protective water-based inorganic ceramic coating and preparation method thereof

Abstract

The invention discloses a long-acting protective water-based inorganic ceramic coating and a preparation method thereof, and relates to the technical field of coatings, the long-acting protective water-based inorganic ceramic coating comprises a film forming system, a pigment and filler system and an auxiliary agent system; the film forming system comprises nano inorganic resin; the pigment and filler system comprises titanium dioxide and nano inorganic filler; the auxiliary agent system comprises a dispersing agent, a wetting agent, a defoaming agent, cellulose, a flatting agent and a preservative, and the film forming system containing the nano inorganic resin, the pigment and filler system containing the titanium dioxide and the nano inorganic filler and the auxiliary agent system containing the dispersing agent, the wetting agent, the defoaming agent, the cellulose, the flatting agent and the preservative are constructed. And all the components are mixed and dispersed to form the coating, so that the technical problems that a single inorganic system is poor in film-forming property and easy to crack are solved.

Description

Technical Field

[0001] This invention relates to the field of coating technology, specifically to a long-lasting protective water-based inorganic ceramic coating and its preparation method. Background Technology

[0002] This invention relates to the field of coating technology, specifically to a water-based inorganic ceramic coating, its preparation method, and its application. Ceramic coatings are a novel type of high-performance, environmentally friendly coating that uses inorganic polymers such as silica sol or silanes as the main film-forming substances. Through sol-gel or nanomaterial composite technology, a dense coating with a ceramic-like structure is formed on the surface of a substrate. Compared with traditional organic resin coatings, it has significant advantages such as high hardness and wear resistance, high temperature resistance, environmental friendliness with low VOCs, and excellent weather resistance. However, in practical applications, traditional inorganic ceramic coatings mainly rely on silica sol condensation reaction to form films. Although the film has high hardness after formation, the coating is not dense enough and has micropores. These pores can easily become channels for water molecules to penetrate, leading to problems such as softening, whitening, blistering, decreased adhesion, or even peeling, as well as substrate corrosion and other protective failures. The water resistance of ordinary ceramic coatings can only reach about 1000 hours, which is difficult to meet the long-term protection requirement of at least 4000 hours in harsh environments. This invention provides a long-lasting protective waterborne inorganic ceramic coating, which aims to solve the aforementioned technical problems by optimizing the synergistic effect of the film-forming system, pigment and filler system, and additive system. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a long-lasting protective water-based inorganic ceramic coating and its preparation method, thus solving the technical problems mentioned in the background section.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a long-lasting protective water-based inorganic ceramic coating, comprising a film-forming system, a pigment and filler system, and an additive system; The film-forming system comprises nano-inorganic resin; The pigment and filler system includes titanium dioxide and nano-inorganic fillers; The additive system includes dispersants, wetting agents, defoamers, cellulose, leveling agents, and preservatives; The coating is prepared by mixing and dispersing the components, and the resulting coating has a water resistance of at least 4,000 hours.

[0005] In some embodiments, the nano-inorganic resin is 50-70 parts by mass, the titanium dioxide is 4-6 parts by mass, and the nano-inorganic filler is 8-12 parts by mass.

[0006] In some embodiments, the additive system further includes a multifunctional additive and / or bentonite for adjusting the viscosity and pH of the system.

[0007] In some embodiments, the components of the coating, by weight (in parts per 1000 parts), specifically include: Water: 200-220 servings; Cellulose: 1-2 parts; Bentonite: 1-3 parts; Multifunctional additive: 0.5-1.5 parts; Dispersant: 2-4 parts; Wetting agent: 0.5-1.5 parts; Defoamer: 1-3 parts (including the part added in the first stage); Preservative: 0.5-1.5 parts; Titanium dioxide: 40-60 parts; Nano-inorganic filler: 90-110 parts; Nano-inorganic resin: 600-640 parts; Leveling agent: 5-7 parts.

[0008] In some embodiments, the addition of the defoamer is divided into two stages: the first stage is to add 1-3 parts before the pigment is dispersed, and the second stage is to add 1-3 parts after the nano-inorganic resin is added.

[0009] In some embodiments, the viscosity of the coating is 60-80 KU in the initial state, stabilizes at 80-90 KU after 7 days, and the pH value is maintained at 9-10.

[0010] In some embodiments, the dry board coating properties formed by the coating include: adhesion grade 0, impact resistance up to 50cm, and no cracking during a 90° bending test.

[0011] In some embodiments, the coating achieves a hardness of 5H or higher after baking and curing at 80-100℃, and a hardness of 3H or higher after air drying at room temperature for 24 hours.

[0012] A method for preparing a long-lasting protective water-based inorganic ceramic coating, applicable to the aforementioned water-based inorganic ceramic coating, the method comprising the following steps: Water, cellulose, bentonite, multifunctional additives, dispersants, wetting agents, defoamers and preservatives added in the first stage are mixed and dispersed at low speed in the first stage. Titanium dioxide and nano-inorganic fillers were added to the mixture obtained in the first stage for high-speed dispersion in the second stage. Nano-inorganic resin, leveling agent, and defoamer added in the second stage are added to the mixture obtained in the second stage, and the mixture is dispersed in the third stage. After dispersion, the mixture is filtered and stored to obtain the water-based inorganic ceramic coating.

[0013] This invention provides a long-lasting protective water-based inorganic ceramic coating and its preparation method, which has the following beneficial effects: By constructing a film-forming system containing nano-inorganic resin, a pigment and filler system containing titanium dioxide and nano-inorganic fillers, and an additive system containing dispersants, wetting agents, defoamers, cellulose, leveling agents, and preservatives, and mixing and dispersing these components to form a coating, the technical problems of poor film-forming properties and easy cracking of single inorganic systems are solved. This technical solution, through the synergistic effect of the film-forming system and the pigment and filler system, ensures both the high density of the inorganic coating and enhances the mechanical strength of the film, thereby enabling the formed coating to have an ultra-long water resistance of over 4000 hours, achieving long-term protection of the substrate and overcoming the defects of insufficient water resistance and short protective life that are common in existing water-based inorganic coatings. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the process flow of the present invention.

[0015] Figure 2 This is a schematic diagram of Figure 1 in an embodiment of the present invention.

[0016] Figure 3 Figure 2 is a schematic diagram of an embodiment of the present invention. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1-3 This invention provides a long-lasting protective water-based inorganic ceramic coating and its preparation method. Figure 1 This is a flow chart of the coating preparation process. A long-lasting protective water-based inorganic ceramic coating includes a film-forming system, a pigment and filler system, and an additive system. The film-forming system includes nano-inorganic resins; The pigment and filler system includes titanium dioxide and nano-inorganic fillers; The additive system includes dispersants, wetting agents, defoamers, cellulose, leveling agents, and preservatives; The coating is prepared by mixing and dispersing the components, and the resulting coating has a water resistance of at least 4,000 hours.

[0019] In some embodiments, the mass fraction of the nano-inorganic resin is 50-70 parts, the mass fraction of the titanium dioxide is 4-6 parts, and the mass fraction of the nano-inorganic filler is 8-12 parts.

[0020] In some embodiments, the additive system further includes a multifunctional additive and / or bentonite for adjusting the viscosity and pH of the system.

[0021] In some embodiments, the components of the coating, by weight (in parts per 1000 parts), specifically include: Water: 200-220 servings; Cellulose: 1-2 parts; Bentonite: 1-3 parts; Multifunctional additive: 0.5-1.5 parts; Dispersant: 2-4 parts; Wetting agent: 0.5-1.5 parts; Defoamer: 1-3 parts (including the part added in the first stage); Preservative: 0.5-1.5 parts; Titanium dioxide: 40-60 parts; Nano-inorganic filler: 90-110 parts; Nano-inorganic resin: 600-640 parts; Leveling agent: 5-7 parts.

[0022] In some embodiments, the addition of defoamer is divided into two stages: the first stage is to add 1-3 parts before pigment dispersion, and the second stage is to add 1-3 parts after the addition of nano-inorganic resin.

[0023] In some embodiments, the viscosity of the coating is 60-80 KU in the initial state, stabilizes at 80-90 KU after 7 days, and the pH value is maintained at 9-10.

[0024] In some embodiments, the properties of the dry board coating formed by the coating include: adhesion grade 0, impact resistance up to 50 cm, and no cracking during a 90° bending test.

[0025] In some embodiments, the coating achieves a hardness of 5H or higher after baking and curing at 80-100℃, and a hardness of 3H or higher after air drying at room temperature for 24 hours.

[0026] A method for preparing a long-lasting protective water-based inorganic ceramic coating, applicable to the aforementioned water-based inorganic ceramic coating, the method comprising the following steps: Water, cellulose, bentonite, multifunctional additives, dispersants, wetting agents, defoamers and preservatives added in the first stage are mixed and dispersed at low speed in the first stage. Titanium dioxide and nano-inorganic fillers were added to the mixture obtained in the first stage for high-speed dispersion in the second stage. Nano-inorganic resin, leveling agent, and defoamer added in the second stage are added to the mixture obtained in the second stage, and the mixture is dispersed in the third stage. After dispersion, the mixture is filtered and stored to obtain water-based inorganic ceramic coating.

[0027] It is worth noting that all standard parts used in this invention can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each part all adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The models of electrical structure equipment involved can be selected according to the user's needs, as long as they meet the requirements of this application. In addition, the circuit connection adopts conventional connection methods in the prior art. The supporting electrical structures such as the control, current detection, position feedback, predicted voltage synchronization and parameter adjustment of the electrical equipment are all existing technologies, such as PLC controllers and module structures, so they will not be described in detail here.

[0028] A specific embodiment of this application is described below with reference to the accompanying drawings: This embodiment provides a long-lasting protective water-based inorganic ceramic coating, the formulation of which is shown in Table 1 below, with a total amount of 1000g.

[0029] like Figure 1 The coating formulation table for Example 1 is shown below; Preparation method: Pulping stage (low-speed dispersion): Add water (210.5g), cellulose (1.5g), bentonite (2.0g), multifunctional additive (1g), dispersant (3g), wetting agent (1g), defoamer (2g) added in the first stage, and preservative (1g) to the dispersion tank in sequence, and disperse for 15 minutes under low-speed (about 800-1000r / min) stirring conditions until the materials are evenly mixed.

[0030] Dispersion and grinding stage (high-speed dispersion): Add titanium dioxide (50g) and nano-inorganic filler (100g) to the above mixture, increase the dispersion speed to 2500-3000r / min, and disperse at high speed for 60 minutes to ensure that the pigments and fillers are fully wetted and deagglomerated, and that the fineness meets the requirements.

[0031] Paint mixing stage (slow dispersion): Reduce the rotation speed to 1000-1200r / min, slowly add nano-inorganic resin (620g), leveling agent (6g) and defoamer (2g) added in the second stage, and continue to disperse for 10 minutes to eliminate the bubbles generated by high-speed dispersion and make the system uniform and stable.

[0032] Filtration and discharge: Filter with a 100-mesh or 200-mesh filter, discharge and store the material to obtain the water-based inorganic ceramic coating.

[0033] Performance testing: The prepared coatings and films were subjected to performance tests, and the results are as follows: Figure 2 As shown; Conclusion: The coating prepared in Example 1 has excellent comprehensive performance, especially its water resistance of more than 4000 hours. It also has high hardness and good adhesion, thus achieving the purpose of long-term protection.

[0034] Comparative Example 1 (Conventional Organic-Inorganic Hybrid System) The difference between Comparative Example 1 and Example 1 is that the "nano-inorganic resin" (620g) in Example 1 was completely replaced with commercially available organosilicon-modified acrylic resin, while the remaining components, contents and preparation processes were the same as in Example 1.

[0035] Performance testing: The test was conducted using the same method as in Example 1.

[0036] Results: The coating prepared in Comparative Example 1 had a low initial viscosity (62 KU), which increased slightly after 24 hours. Regarding film properties, the self-drying hardness after 24 hours was only HB, and the hardness after baking at 80℃ was 2H. In the water resistance test, after 240 hours, the coating film showed slight blistering and whitening, and its impact resistance (40 cm) was slightly lower than that of Example 1. Analysis: This indicates that a single organic resin cannot provide the high hardness and density characteristic of inorganic coatings, resulting in a significant decrease in its water resistance and hardness, failing to meet the requirements for long-term protection.

[0037] Comparative Example 2 (Low Resin Content System): The difference between Comparative Example 2 and Example 1 is that the amount of inorganic resin added was reduced, and the amount of water added was increased accordingly to maintain the overall balance. The amount of "nano-inorganic resin" in the formula is 300g, the amount of "water" is 530.5g, and the content of other components (auxiliaries, pigments and fillers) and the preparation process are consistent with those in Example 1.

[0038] Performance testing: The test was conducted using the same method as in Example 1.

[0039] Results: The coating prepared in Comparative Example 2 had an excessively low initial viscosity (48 KU) and exhibited significant sedimentation. The surface drying time was relatively fast (30 min), but the film was thin after complete drying and had poor hiding power. The 24-hour self-drying hardness was 2H (relatively brittle), and the hardness after baking at 80℃ was 4H. In the water resistance test, after 96 hours, the thin film and insufficient resin coating of the filler led to a sharp decrease in water resistance and powdering of the coating. Analysis: This indicates that only when the nano-inorganic resin reaches a specific high content (e.g., 50-70 parts) can a continuous and dense coating layer be formed on the surface of pigments and fillers, thereby ensuring the coating's density, adhesion, and ultra-long water resistance.

[0040] Comparative Example 3 (without nano-inorganic fillers) The difference between this comparative example and Example 1 is that the "nano-inorganic filler" (100g) was removed, and this part of the weight was made up entirely by "nano-inorganic resin" (i.e., the amount of nano-inorganic resin is changed to 720g). The remaining components and preparation process are consistent with Example 1.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A long-lasting protective water-based inorganic ceramic coating, characterized in that, It includes film-forming systems, pigment and filler systems, and auxiliary agent systems; The film-forming system comprises nano-inorganic resin; The pigment and filler system includes titanium dioxide and nano-inorganic fillers; The additive system includes dispersants, wetting agents, defoamers, cellulose, leveling agents, and preservatives.

2. The long-lasting protective water-based inorganic ceramic coating according to claim 1, characterized in that, The nano-inorganic resin has a mass fraction of 50-70 parts, the titanium dioxide has a mass fraction of 4-6 parts, and the nano-inorganic filler has a mass fraction of 8-12 parts.

3. The long-lasting protective water-based inorganic ceramic coating according to claim 1, characterized in that, The additive system also includes a multifunctional additive for adjusting the viscosity of the system and / or bentonite for adjusting the pH value.

4. The long-lasting protective water-based inorganic ceramic coating according to claim 1, characterized in that, The components of the coating, calculated per 1000 parts by weight, specifically include: Water: 200-220 portions; Cellulose: 1-2 parts; Bentonite: 1-3 parts; Multifunctional additive: 0.5-1.5 parts; Dispersant: 2-4 parts; Wetting agent: 0.5-1.5 parts; Defoamer: 1-3 parts; Preservative: 0.5-1.5 parts; Titanium dioxide: 40-60 parts; Nano-inorganic filler: 90-110 parts; Nano-inorganic resin: 600-640 parts; Leveling agent: 5-7 parts.

5. The long-lasting protective water-based inorganic ceramic coating according to claim 1, characterized in that, The water-based inorganic ceramic coating has an initial viscosity of 60-80 KU, stabilizes at 80-90 KU, and maintains a pH value of 9-10.

6. The long-lasting protective water-based inorganic ceramic coating according to claim 1, characterized in that, The properties of the dry board coating formed by the coating include: adhesion grade 0, impact resistance up to 50cm, and no cracking during a 90° bending test.

7. A long-lasting protective water-based inorganic ceramic coating according to claim 1 or 6, characterized in that, The coating has a hardness greater than 5H after baking and curing at 80-100℃, and a hardness greater than 3H after drying at room temperature.

8. A method for preparing a long-lasting protective water-based inorganic ceramic coating, applied to the water-based inorganic ceramic coating according to any one of claims 1 to 7, characterized in that, The preparation method of the water-based inorganic ceramic coating includes the following steps: The water, cellulose, bentonite, multifunctional additive, dispersant, wetting agent, defoamer added in the first stage, and preservative are mixed and dispersed at low speed in the first stage. The titanium dioxide and the nano-inorganic filler are added to the mixture obtained in the first stage to carry out the second stage of high-speed dispersion. The nano-inorganic resin, leveling agent, and defoamer added in the second stage are added to the mixture obtained in the second stage, and the mixture is dispersed in the third stage. After dispersion, the mixture is filtered and stored to obtain the water-based inorganic ceramic coating.

9. The method for preparing a long-lasting protective water-based inorganic ceramic coating according to claim 8, characterized in that, The addition of the defoamer is divided into two stages: the first stage is to add 1-3 parts before the pigment system is dispersed, and the second stage is to add 1-3 parts after the nano-inorganic resin is added.

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