Two Liquid Type Ceramic Coating Agents

Abstract

A two-component ceramic coating composition is disclosed that is ceramic-based, environmentally friendly, has excellent breathability so that peeling of the coating film due to moisture does not occur, does not easily break even under heavy impact, has excellent wear resistance, and can provide UV blocking performance. The disclosed two-component ceramic coating composition may include a main component; and a curing agent.

Description

Technology Field

[0001] The present invention relates to a two-component ceramic coating composition, and more specifically, to a coating composition that can be applied to tiles, steel structures, concrete structures, etc., and has improved adhesion, UV resistance, water resistance, breathability, stain resistance, wear resistance, corrosion resistance, and durability. Background Technology

[0003] In general, the properties of steel and concrete structures deteriorate over time. Specifically, steel and concrete structures undergo drying or shrinkage due to the external environment, and cracks occur due to repeated expansion or contraction caused by temperature changes.

[0004] Furthermore, cracks can have a decisive impact on the performance degradation of concrete structures. When cracks occur, corrosion is caused by moisture or chloride ions penetrating the interior of the structure. This leads to additional cracking, causing the coating to split, peel, and discolor, which accelerates the decline in durability. As the performance of concrete structures gradually deteriorates, periodic repairs become necessary.

[0005] To prevent such cracking and improve durability, dispersants, waterproofing agents, copolymers, etc., are added to the mortar mixture, or a protective film is formed using organic components after the mortar is applied. Although organic components such as epoxy, urethane, and acrylic resins are mainly used as constituents for forming the protective film, it is not easy to prevent cracking.

[0007] Furthermore, while protective coatings composed of organic components have the advantages of good processability and excellent initial adhesion, their durability decreases over time as the organic materials easily deteriorate due to ultraviolet rays, ozone, or moisture. Additionally, protective coatings made of organic components can form a film that blocks ventilation, potentially leading to corrosion of the structure.

[0008] In order to not only resolve the problems associated with these organic components but also prevent cracking, there is a need to develop a protective coating with improved breathability, stain resistance, durability, and water resistance by utilizing ceramic materials as the main component and additives. Prior art literature

[0010] Registered Patent Publication 10-1858122 (Publication Date: May 15, 2018) The problem to be solved

[0011] The present invention was conceived in consideration of the points mentioned above, and relates to a two-component ceramic coating composition comprising a main component and a curing agent. The purpose is to provide a two-component ceramic coating composition that is ceramic-based, environmentally friendly, has excellent breathability to prevent peeling of the coating film due to moisture, does not easily break even under heavy impact, has excellent wear resistance, and can provide UV blocking performance. means of solving the problem

[0013] To achieve the above objective, a two-component ceramic coating composition may include a main component; and a curing agent.

[0014] The above subject is characterized by comprising 40 to 50 wt% potassium silicate; 1 to 5 wt% 1,6-hexanediol; 10 to 30 wt% titanium dioxide sol; 10 to 20 wt% propylene glycol monomethyl ether; 5 to 10 wt% zeolite; 5 to 10 wt% magnesium sulfate; 0.2 to 0.4 wt% formic acid; and 0.2 to 10 wt% purified water.

[0015] The above curing agent may comprise 92 to 97.5 wt% alkoxysilane; 0.01 to 0.05 wt% nitric acid; 0.06 to 1 wt% purified water; and 2 to 7 wt% additives.

[0016] The above-mentioned subject is characterized by further including at least one of hydroxybenzoate and amine light stabilizer in an amount of 0.01 to 0.08 wt% based on the total wt% of the subject.

[0017] The above-mentioned main component and hardener are characterized by being mixed in a ratio of 3 to 3.3 to 1 based on volume.

[0018] The above potassium silicate and the above magnesium sulfate are characterized by having a particle size distribution of 0.3 to 20 μm.

[0019] The above two-component ceramic coating composition is characterized by having an adhesion strength of 24 kgf / cm2 or more and a wear resistance of 25 mg or less.

[0020] When the above two-component ceramic coating composition is used to coat any one of a tile, a steel structure, or a concrete structure, the coating thickness after drying is 150 to 200 μm. Effects of the invention

[0022] The two-component ceramic coating composition according to the present invention is characterized by comprising a main component and a curing agent, and is environmentally friendly as it uses ceramic as the main raw material and minimizes the content of additives, etc., has excellent breathability so that the coating film does not peel off due to moisture, does not easily break or peel off even under heavy impact, has excellent wear resistance, and has the effect of providing UV blocking performance and corrosion resistance. Specific details for implementing the invention

[0024] All terms described in this specification have been selected based on currently widely used general terms in consideration of the functions of the present invention; however, these may vary depending on the intent, convention, or emergence of new technologies of those skilled in the art. Furthermore, if the inventor specifies any term in this invention, its meaning will be described in the description of the invention. Therefore, terms used in this invention should be interpreted not merely by their names, but based on their actual meanings and the overall content described in the description of the invention.

[0025] A two-component ceramic coating composition according to an embodiment of the present invention will be described in detail below.

[0026] The present invention provides a two-component ceramic coating composition.

[0027] A two-component coating composition according to an embodiment of the present invention may include a main component; and a curing agent.

[0028] The two-component ceramic coating agent of the present invention comprises a main component. The main component may comprise 40 to 50 wt% potassium silicate; 1 to 5 wt% 1,6-hexanediol; 10 to 30 wt% titanium dioxide; 10 to 20 wt% propylene glycol monomethyl ether; 5 to 10 wt% zeolite; 5 to 10 wt% magnesium sulfate; 0.2 to 0.4 wt% formic acid; and 0.2 to 10 wt% purified water. Additionally, the main component may further comprise 0.01 to 0.08 wt% of at least one of hydroxybenzoate and an amine light stabilizer based on the total wt% of the main component.

[0029] The above potassium silicate can be used to improve density, strength, chemical resistance, water resistance, etc. As a substitute for the above potassium silicate, which is a soluble silicate, sodium silicate, lithium silicate, etc., may be used.

[0030] When concrete is cured, calcium silicate hydrate (CSH) is formed to develop strength, but calcium hydroxide and ettringite are also produced as byproducts, which become a cause of concrete deterioration later on. Since cured concrete is porous, calcium hydroxide on the concrete surface reacts with acidic substances such as moisture, carbon dioxide, and sulfides in the air to neutralize the surface, which can corrode the concrete surface and lead to serious structural defects. Therefore, if potassium silicate is sprinkled on the concrete surface to prevent it from easily reacting with moisture, carbon dioxide, and sulfides, the potassium silicate penetrates into the pores and microcracks on the concrete surface and chemically reacts with unreacted calcium hydroxide to produce insoluble calcium silicate hydrate (CSH) within the concrete pores. This inhibits the reaction of calcium hydroxide with moisture, carbon dioxide, and sulfides, thereby suppressing concrete deterioration.

[0031] Accordingly, the potassium silicate may be included in an amount of 40 to 50 wt% relative to the total wt% of the main component. As another embodiment, the potassium silicate may be included in an amount of 45 to 50 wt%. If the content of the potassium silicate is less than 40 wt%, it may be insufficient to improve density, strength, chemical resistance, and water resistance due to unreacted calcium hydroxide. Additionally, if the content of the potassium silicate exceeds 50 wt%, it may exceed the critical pigment volume concentration, which may degrade the mechanical properties of the coating film.

[0032] In addition, the potassium silicate may have a particle size distribution of 0.3 to 20 µm. Within this range, the potassium silicate can serve to improve durability, mechanical strength, workability, and gloss. Therefore, if the particle size distribution of the potassium silicate is less than 0.3 µm, the particles are excessively small, which may cause difficulties due to dispersion during processing. Furthermore, if the particle size distribution of the potassium silicate exceeds 20 µm, the structure may not be dense enough to improve effects such as durability and mechanical strength.

[0033] The above 1,6-hexanediol can be used to improve antibacterial and antifungal effects. That is, the above 1,6-hexanediol can improve the antibacterial effect by preventing the proliferation of microorganisms in the coating composition of the present invention.

[0034] Accordingly, the above 1,6-hexanediol may be included in an amount of 1 to 5 wt% relative to the total wt% of the main component. As another example, the above 1,6-hexanediol may be included in an amount of 1 to 3 wt%. If the content of the above 1,6-hexanediol is less than 1 wt%, the antibacterial and antifungal effects cannot be improved. In addition, if the content of the above 1,6-hexanediol exceeds 5 wt%, it may result in a decrease in the content of other components, which may lead to a reduction in durability, wear resistance, etc.

[0035] The above titanium dioxide sol can be used to improve acid resistance, alkali resistance, and antibacterial effects. The above titanium dioxide sol can be prepared by hydrolyzing alkoxytitanine into a monodisperse form with a size of 10 to 50 nm through hydrolysis and condensation polymerization in the presence of a solvent, acid, and water.

[0036] The above alkoxytitanine may be selected from at least one of titanium isopropoxide and titanium butoxide, but is not limited thereto.

[0037] In the above-mentioned starting material, alkoxytitanine, the alkoxy group is hydrolyzed by water to form a hydroxyl group, and the hydroxyl group formed thereby forms a titanium dioxide sol through a condensation reaction between the hydroxyl group or the alkoxy group with another alkoxytitanine.

[0038] When preparing titanium dioxide sol, a catalyst is used to control the reaction rate. Suitable catalysts include, for example, acid catalysts such as hydrochloric acid, acetic acid, nitric acid, sulfuric acid, chlorosulfoic acid, iodic acid, and phyllophosphate, and base catalysts such as ammonia, potassium hydroxide, barium hydroxide, and imidazole. Additionally, catalysts may be selected from a group consisting of combinations thereof. At least one of the acid catalyst and the base catalyst may be added in an amount of 0.0001 to 0.03 wt% relative to the total wt% of alkoxytitanine, but is not limited thereto.

[0039] Accordingly, the titanium dioxide sol may be included in an amount of 10 to 30 wt% relative to the total wt% of the main component. If the content of the titanium dioxide sol is less than 10 wt%, acid resistance, alkali resistance, and antibacterial effect cannot be improved. In addition, if the content of the titanium dioxide sol exceeds 30 wt%, it may lead to a decrease in the content of other components, thereby reducing the durability, wear resistance, etc., of the coating composition of the present invention.

[0040] The above propylene glycol monomethyl ether can be used to control the thickness of the coating film and to improve adhesion, emulsion stability, and acid resistance. Water-soluble cellulose derivatives, such as methylcellulose and carboxymethylcellulose salts, may be used as substitutes for the above propylene glycol monomethyl ether. The above propylene glycol monomethyl glycol is a colorless, transparent, viscous liquid that can be used as a vapor heavier than air, a solvent, and an antifreeze agent. That is, the above propylene glycol monomethyl glycol can be used as a solvent for paints and protective films.

[0041] Accordingly, the above propylene glycol monomethyl ether may be included in an amount of 10 to 20 wt% relative to the total wt% of the main component. If the content of the above propylene glycol monomethyl ether is less than 10 wt%, the dilution effect decreases, resulting in high viscosity and making stirring impossible. Additionally, if the content of the above propylene glycol monomethyl ether exceeds 20 wt%, the viscosity decreases excessively, leading to reduced stability and making it difficult to form a uniform coating film.

[0042] The above zeolite can be used to improve antibacterial, antifungal, and stain resistance properties. The above zeolite is light gray, has a weakly acidic pH of 5.72 ± 0.5, and possesses properties of good absorption, fast absorption rate, and solubleness in water. Furthermore, due to its unique honeycomb-shaped crystal structure, the above zeolite can adsorb moisture and harmful gases, thereby removing impurities and preventing contamination caused by moisture. Additionally, the above zeolite can prevent the proliferation of harmful microorganisms. Accordingly, the above zeolite can be applied in various fields, such as synthetic detergent additives, antibacterial agents, livestock feed additives, building materials, purification agents, and soil moisturizers.

[0043] Accordingly, the zeolite may comprise 5 to 10 wt% of the total wt% of the main component. As another embodiment, the zeolite may comprise 15 to 20 wt% of the total wt% of the main component. If the content of the zeolite is below the range, the antibacterial, antifungal, and stain-resistant effects cannot be improved. Furthermore, if the content of the zeolite exceeds the range, it may result in a decrease in the content of other components, thereby reducing the durability, wear resistance, etc., of the coating composition of the present invention.

[0044] The above magnesium sulfate can be used to improve wear resistance and strength. Magnesium carbonate can be used as a substitute for the above magnesium sulfate. The above magnesium sulfate is characterized by good meltability and a very low price.

[0045] Accordingly, the magnesium sulfate may be included in an amount of 5 to 10 wt% relative to the total wt% of the main component. As another embodiment, the magnesium sulfate may be included in an amount of 15 to 20 wt% relative to the total wt% of the main component. If the content of the magnesium sulfate is below the range, effects such as wear resistance and strength cannot be improved. Furthermore, if the content of the magnesium sulfate exceeds the range, it may result in a decrease in the content of other components, making it difficult to achieve other effects.

[0046] In addition, the particle size distribution of the magnesium sulfate may be 0.3 to 20 µm. Within this range, the particle size distribution of the magnesium sulfate can play a role in improving wear resistance, mechanical strength, and workability. Therefore, if the particle size distribution of the magnesium sulfate is less than 0.3 µm, the particles are excessively small, which may cause difficulties due to dispersion during processing. Furthermore, if the particle size distribution of the magnesium sulfate exceeds 20 µm, the structure is not dense, which may result in insufficient improvement of effects such as wear resistance and mechanical strength.

[0047] The above formic acid can be used as a solvent in the coating composition of the present invention. Siloxane, oxane, hydrochloric acid, etc., can be used as a substitute for the above formic acid. Accordingly, the above formic acid may be included in an amount of 0.2 to 0.4 wt% with respect to the total wt% of the main component.

[0048] The above purified water can be used as a solvent for the coating composition of the present invention. Accordingly, the above purified water may contain 0.2 to 10 wt%.

[0049] At least one of the above hydroxybenzoate and amine light stabilizer may be further included in the subject matter. The above hydroxybenzoate and amine light stabilizer may be included in the coating composition of the present invention as ultraviolet stabilizers.

[0050] Hydroxybenzoate, which is a UV absorber and serves as the above-mentioned UV stabilizer, can improve the lightfastness effect of the coating composition of the present invention. That is, the above-mentioned hydroxybenzoate absorbs incoming ultraviolet (UV) rays and converts them into infrared rays, releasing heat to the outside, thereby suppressing the phenomenon of the composition being decomposed by UV rays. In addition, any substance known in the art may be used as a substitute for hydroxybenzoate as the above-mentioned UV absorber.

[0051] The amine light stabilizer used as the above-mentioned UV stabilizer can improve the light resistance effect by inhibiting the decomposition of the coating composition of the present invention and protecting the surface. That is, the above-mentioned amine light stabilizer (HALS) can stop a chain reaction of photooxidation by eliminating free radicals so that free radicals already generated in the composition due to photodecomposition by ultraviolet rays cannot cause a chain reaction. In addition, any known in the art may be used as the above-mentioned amine light stabilizer, but it is preferable that it be a mixture of bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate and methyl 1,2,2,6,6-pentamethyl-4-piperidyl sebacate, and it may be even more preferable that it be CIBA’s TINUVIN 292.

[0052] Accordingly, at least one of the above hydroxybenzoate and amine light stabilizer may be included in an amount of 0.01 to 0.08 wt% based on the total wt% of the main component. If the content of the above hydroxybenzoate and amine light stabilizer is less than 0.01 wt%, the ability to absorb ultraviolet rays is significantly reduced, making it difficult to protect the coating film from ultraviolet rays. In addition, if the content of the above hydroxybenzoate and amine light stabilizer exceeds 0.08 wt%, the curing of the composition may be hindered by suppressing the activity of the photoinitiator due to excessive absorption of ultraviolet rays.

[0053] The two-component ceramic coating agent of the present invention comprises a curing agent. The curing agent may comprise 90 to 97.5 wt% of alkoxysilane; 0.01 to 0.05 wt% of nitric acid; 0.06 to 1 wt% of purified water; and 2 to 7 wt% of additives.

[0054] The above alkoxysilane may be included to improve the water-repellent and adhesive effects of the coating film. The above alkoxysilane forms a three-dimensional gel structure in the presence of water, and this reaction can occur through hydrolysis and condensation reactions. Therefore, the gel reaction of the above alkoxysilane not only strengthens concrete by providing cohesive force to weakened concrete tissues, but also prevents weathering or damage to the concrete that may occur due to water penetration. In addition, the above alkoxysilane has low viscosity, is chemically stable, and is stable to light, especially ultraviolet (UV) light, so it can prevent the risk of discoloration. Any alkoxysilane known in the art may be used, but it may be more preferable to include at least one of vinyltriethoxysilane, tetraectoxysilane, methyltriethoxysilane, 3-aminotriethoxysilane, and GPTMS ((3-glycidyloxypropyl)trimethoxysilane).

[0055] Accordingly, the above alkoxysilane may be included in an amount of 92 to 97.5 wt% relative to the total wt% of the curing agent. If the content of the above alkoxysilane is less than 92 wt%, a sufficient three-dimensional gel structure of the alkoxysilane cannot be formed, and thus weathering or damage caused by moisture on the surface of the coating film cannot be prevented. In addition, if the content of the alkoxysilane exceeds 97.5 wt%, it results in a reduction of other components, leading to insufficient hydrolysis and condensation reactions, and thus weathering or damage caused by moisture on the surface of the coating film cannot be prevented either.

[0056] The above nitric acid can be used as a catalyst to control the reaction rate. As a substitute for the above nitric acid, at least one of acid catalysts such as hydrochloric acid, acetic acid, sulfuric acid, chlorosulfonic acid, iodic acid, and phyllophosphate, or base catalysts such as ammonia, potassium hydroxide, barium hydroxide, and imidazole may be used. Accordingly, the above nitric acid may be included in an amount of 0.01 to 0.05 wt% relative to the total wt% of the curing agent.

[0057] The above purified water may be included as a solvent. Accordingly, the above purified water may be included in an amount of 0.06 to 1 wt% relative to the total wt% of the curing agent.

[0058] The above additives may be used to improve the formation of the coating film, the mechanical properties of the coating film, and workability. As the above additives, defoaming agents, dispersants, plasticizers, thickeners, anti-settling agents, adhesion promoters, coupling agents, etc., may be used. Any one of the known defoaming agents, dispersants, plasticizers, thickeners, anti-settling agents, and adhesion promoters may be used.

[0059] Accordingly, the above additive may be included in an amount of 2 to 7 wt% relative to the total wt% of the curing agent. If the content of the above additive is less than 2 wt%, problems with workability may occur. In addition, if the content of the above additive exceeds 5 wt%, crating may occur in the coating film or deterioration of the coating film may occur.

[0060] The coating composition of the present invention can be prepared by mixing the above subject and the curing agent in a ratio of 3 to 3.3 to 1 based on volume.

[0061] In addition, when the above-described two-component ceramic coating composition is used to coat any one of tiles, steel structures, or concrete structures, the coating thickness after drying can be 150 to 200 μm. Therefore, if the coating thickness is less than 250 μm, there is an advantage in that the working time is shortened, but mechanical strength such as durability, wear resistance, stain resistance, and antibacterial properties may be reduced because the film thickness is too thin. In addition, if the coating thickness exceeds 200 μm, the durability of the film is improved, but problems may arise in that on-site workability and productivity are reduced.

[0062] As such, the two-component coating composition according to the embodiment of the present invention is ceramic-based, environmentally friendly, and provides a composition with excellent breathability, adhesion, stain resistance, antibacterial, antifungal, durability, and wear resistance.

[0064] The following describes examples of preparation and embodiments. The following examples of preparation and embodiments are provided merely to aid in understanding the present invention.

[0066] <Preparation of Titanium Dioxide Sol>

[0067] 1 kg of titanium butoxide and 4.5 kg of industrial isopropyl alcohol were added to a 10 L reactor and stirred. While maintaining the reactor temperature at 80°C, a solution of 3 kg of water and 50 g of hydrochloric acid was added at a rate of 20 ml / min using a metering pump, and a partial hydrolysis polymerization reaction was carried out at that temperature for 12 hours to produce titanium dioxide sol. The particle size of the prepared titanium dioxide is approximately 25 nm.

[0069] <Preparation of Coating Composition>

[0070] [Example 1] - Preparation of coating composition

[0071] Potassium silicate 40wt%, 1,6-hexanediol 1wt%, titanium dioxide sol 30wt%, propylene glycol monomethyl ether 10wt%, zeolite 5wt%, magnesium sulfate 5wt%, formic acid 0.2wt%, purified water 8.78wt%, and UV stabilizer 0.02wt% at a temperature of 25 The main component was prepared by stirring and mixing for a predetermined time while maintaining it.

[0072] In addition, a curing agent component was prepared by stirring and mixing 92 wt% alkoxysilane, 0.05 wt% nitric acid, 0.95 wt% purified water, and 7 wt% additives for a predetermined time.

[0073] A coating composition was prepared by mixing the above-mentioned main component and curing agent component in a ratio of 3:1.

[0074] Potassium silicate and magnesium sulfate with a particle size distribution of 20 μm were used. Additionally, a specimen was prepared using the coating composition with a coating thickness of 150 μm.

[0076] [Examples 2 to 4] - Preparation of coating composition

[0077] Examples 2 to 4 prepared specimens of the coating composition in the same manner as Example 1, with the components, content, and coating thickness of Table 1 below.

[0079] [Comparative Examples 1 to 4] - Preparation of coating composition

[0080] Comparative Examples 1 to 4 were prepared by preparing specimens of the coating composition in the same manner as Example 1, with the components, content, and coating thickness of Table 1 below.

[0082] [Comparative Examples 5 and 6] - Preparation of coating composition

[0083] Comparative Examples 5 and 6 prepared a coating composition with the same components and content as Example 2, but prepared specimens with a coating thickness of 100 μm for Comparative Example 5 and 250 μm for Comparative Example 6 using the coating composition.

[0085] [Comparative Examples 7 and 8] - Preparation of biaxially stretched high-density polyethylene film

[0086] Comparative Example 7 was prepared with the same components and content as Example 2, using potassium silicate and magnesium sulfate with particle size distributions of 0.2 μm each. In addition, Comparative Example 8 was prepared with the same components and content as Example 2, using potassium silicate and magnesium sulfate with particle size distributions of 25 μm each.

[0088] Table 1 below shows the components and content of the embodiments and comparative examples of the present invention.

[0089] Main component and hardener ingredient Example 1 (wt%) Example 2 (wt%) Example 3 (wt%) Example 4 (wt%) Comparative Example 1 (wt%) Comparative Example 2 (wt%) Comparative Example 3 (wt%) Comparative Example 4 (wt%) subject potassium silicate 40 45 50 50 39 45 51 40 1,6-hexanediol 1 2 5 1 3 0.5 2 6 Titanium dioxide sol 30 20 10 10 29 20 31 9 Propylene glycol monomethyl ether 10 15 20 10 10 14 9 21 Zeolite 5 7 5 10 5 4 3 11 magnesium sulfate 5 7 5 10 5 11 3 10 formic acid 0.2 0.3 0.4 0.2 0.2 0.4 0.2 0.3 purified water 8.78 3.69 4.52 8.76 8.795 5.1 0.8 2.6 UV stabilizer 0.02 0.01 0.08 0.04 0.005 0 0 0.1 hardener Alkoxysilane 92 95 97.5 96.5 91 98 95 92 nitric acid 0.05 0.05 0.01 0.03 0.06 0.05 1 0.05 purified water 0.95 0.95 0.49 0.47 1.94 0.95 2 0.95 additives 7 4 2 3 7 1 2 7 note Comparative Examples 5 and 6 have the same components and content as Example 2, but differ only in coating thickness. Comparative Examples 7 and 8 have the same components and content as Example 2, but differ only in the particle size distribution of potassium silicate and magnesium sulfate.

[0090] <Test Example>

[0091] To compare the physical properties of the coating compositions prepared according to the examples and comparative examples, a concrete surface measuring 1000 x 2000 x 200 mm was thoroughly cleaned and dried. The coating was then uniformly applied to the surface using an airless sprayer and cured. After 7 days, the following tests were performed on the coating film: i) an accelerated carbonation test according to KS F 4936; ii) a salt spray test according to KS D 9502; iii) an accelerated weathering test according to KS M 2274; iv) tests for adhesion strength, film appearance, water permeability, chloride ion penetration resistance, and moisture permeability according to KS F 4936; v) a chemical resistance test (sulfuric acid, hydrochloric acid, sodium hydroxide) according to KS M ISO 2812; and vi) an impact resistance test according to KS D 6711. viii) stain resistance test was performed according to KS M3332 2009, ix) abrasion resistance was performed according to ASTM D 40601, and x) pencil hardness test was performed by measuring the degree to which the coating film does not get scratched by scratching it with a 500g pencil.

[0092] Tables 2 and 3 below show the test results.

[0093] division Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Neutering promotion (mm) 0.1 0 0 0.05 0.2 0.5 0.3 0.2 salt spray No issues No issues No issues No issues No issues No issues No issues No issues Accelerated weathering No issues No issues No issues No issues No issues No issues No issues No issues Adhesion strength (kgf / cm2) After standard curing 26.5 28 27 28.5 18 22 20 19.5 After accelerated weathering 26 27.5 26.5 27.5 16.5 21 19.5 18 After alternating hot and cold 26 26.5 26.5 27 16 20.5 19.5 18 alkali resistance after 24,5 26.5 25 27 16 20.5 18 17.5 After saline tolerance 25.5 27 26 28 17 21 19 19 Film formation surface appearance After standard curing No issues No issues No issues No issues No issues No issues No issues No issues After accelerated weathering No issues No issues No issues No issues No issues No issues No issues No issues After alternating hot and cold No issues No issues No issues No issues No issues No issues No issues No issues alkali resistance after No issues No issues No issues No issues No issues No issues No issues No issues After saline tolerance No issues No issues No issues No issues No issues No issues No issues No issues Endurance Can't pitch Can't pitch Can't pitch Can't pitch Can't pitch Can't pitch Can't pitch Can't pitch Chloride ion penetration resistance (c) 200 190 170 150 260 300 280 250 moisture permeability 1.2 1.1 1.0 0.9 1.5 1.8 1.7 1.6 Chemical resistance sulfuric acid No issues No issues No issues No issues No issues No issues No issues No issues hydrochloric acid No issues No issues No issues No issues No issues No issues No issues No issues Sodium hydroxide No issues No issues No issues No issues No issues No issues No issues No issues Impact resistance No issues No issues No issues No issues No issues No issues No issues No issues Stain resistance No issues No issues No issues No issues No issues No issues No issues No issues Wear resistance (mg) 20.2 24.5 27 22.8 33.1 32.3 30.2 35.6 Pencil hardness 5H 5H 5H 5H 3H 3H 3H 3H

[0094] division Example 2 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Neutering promotion 0 0.4 0.1 0.2 0.3 salt spray No issues No issues No issues No issues No issues Accelerated weathering No issues No issues No issues No issues No issues Adhesion strength After standard curing 28 24 27 27 24 After accelerated weathering 27.5 23 26 26.5 22.5 After alternating hot and cold 26.5 23 25.5 26 21 alkali resistance after 26.5 22,5 25 25 21 After saline tolerance 27 23.5 24.5 26.5 22.5 Film formation surface appearance After standard curing No issues No issues No issues No issues No issues After accelerated weathering No issues No issues No issues No issues No issues After alternating hot and cold No issues No issues No issues No issues No issues alkali resistance after No issues No issues No issues No issues No issues After saline tolerance No issues No issues No issues No issues No issues Endurance Can't pitch Can't pitch Can't pitch Can't pitch Can't pitch Chloride ion penetration resistance (c) 190 230 210 200 210 moisture permeability 1.1 1.4 1.3 1.2 1.2 Chemical resistance sulfuric acid No issues No issues No issues No issues No issues hydrochloric acid No issues No issues No issues No issues No issues Sodium hydroxide No issues No issues No issues No issues No issues Impact resistance No issues No issues No issues No issues No issues Stain resistance No issues No issues No issues No issues No issues Wear resistance 24.5 28.9 23.1 23.4 26.7 Pencil hardness 5H 3H 5H 5H 5H

[0096] Referring to Tables 2 and 3 above, it can be confirmed that when a coating film on a structure is applied using the coating composition prepared in the present invention, it exhibits excellent characteristics such as adhesion strength, abrasion resistance, neutralization promotion, resistance to chloride ion penetration (c), and moisture permeability, and also shows excellent results in other physical properties.

[0097] Specifically, it was confirmed that Example 2 and Example 1, which contained evenly high amounts of potassium silicate, titanium dioxide sol, and magnesium sulfate, showed excellent effects in terms of adhesion strength and wear resistance. Therefore, it was found that adhesion strength depends not only on the potassium silicate content in the ceramic powder but also on the wear resistance depending on the content of titanium dioxide sol, magnesium sulfate, and additives.

[0098] In addition, when comparing Example 2 with Comparative Examples 5 and 6, which differ only in coating thickness, it was confirmed that Comparative Example 5, with a coating thickness below the range of the example, showed reduced adhesion strength and wear resistance compared to Example 2, while Comparative Example 6, with a coating thickness exceeding the range of the example, showed almost similar effects compared to Example 2, but was found to be inefficient in terms of economics due to increased costs.

[0099] In addition, when compared with Example 2 and Comparative Examples 7 and 8, which differ only in the particle size distribution of potassium silicate and carbide sulfate, it was confirmed that Comparative Example 7, in which the particle size distribution is below the range of the example, has effects such as adhesion strength and wear resistance equivalent to or lower than Example 2, but workability may be reduced, and Comparative Example 8, in which the particle size distribution exceeds the range of the example, has a less dense particle size, so it was confirmed that the adhesion strength and wear resistance are reduced compared to Example 2.

[0100] The embodiments described above are merely illustrative, and a person skilled in the art to which the present invention pertains can make various modifications and equivalent alternative embodiments therefrom. Therefore, the true technical scope of protection of the present invention must be determined by the technical concept of the invention set forth in the claims.

Claims

Claim 1 A two-component ceramic coating composition comprising: a main component; and a curing agent. Claim 2 A two-component ceramic coating composition according to claim 1, wherein the subject comprises: potassium silicate 40 to 50 wt%; 1,6-hexanediol 1 to 5 wt%; titanium dioxide sol 10 to 30 wt%; propylene glycol monomethyl ether 10 to 20 wt%; zeolite 5 to 10 wt%; magnesium sulfate 5 to 10 wt%; formic acid 0.2 to 0.4 wt%; and purified water 0.2 to 10 wt%. Claim 3 A two-component ceramic coating composition according to claim 1, wherein the curing agent comprises 92 to 97.5 wt% alkoxysilane; 0.01 to 0.05 wt% nitric acid; 0.06 to 1 wt% purified water; and 2 to 7 wt% additive. Claim 4 A two-component ceramic coating composition according to claim 2, characterized in that the subject further comprises 0.01 to 0.08 wt% of at least one of hydroxybenzoate and amine light stabilizer based on the total wt% of the subject. Claim 5 A two-component ceramic coating composition according to claim 1, characterized in that the main component and the curing agent are mixed in a ratio of 3 to 3.3:1 based on volume. Claim 6 A two-component ceramic coating composition according to claim 2, characterized in that the particle size distribution of the potassium silicate and the magnesium sulfate is 0.3 to 20 μm. Claim 7 A two-component ceramic coating composition according to claim 1, characterized in that the two-component ceramic coating composition has an adhesion strength of 24 kgf / cm2 or more and a wear resistance of 25 mg or less. Claim 8 A coating layer characterized by having a coating thickness of 150 to 200 μm after drying when coated on any one of a tile, a steel structure, and a concrete structure using the two-component ceramic coating composition according to any one of claims 1 to 7.