High-performance ceramic coating and preparation method and spraying method thereof

Abstract

The application provides a high-performance ceramic coating and a preparation method and a spraying method thereof, wherein the ceramic coating is composed of a binder, a ceramic filler, a functional additive, a color paste and a diluent; the ceramic filler contains silicon carbide and zirconium oxide, and the mass ratio of the two is (4.8-5.5):3. Through the design of the components and the proportion of the ceramic coating, the components can play a synergistic effect. The specific proportion of the binder ensures that the coating has good adhesion; the silicon carbide and the zirconium oxide in the ceramic filler are matched in a specific proportion, so that the hardness and wear resistance of the coating are improved. The appropriate addition of the functional additive optimizes the comprehensive performance of the coating; the color paste ensures the color stability; and the diluent ensures the workability of the coating. The coating has the advantages of high hardness, excellent wear resistance, strong paint film adhesion, long service life, and is suitable for the kitchen technical field and easy to popularize and implement.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of coatings, and particularly relates to a high-performance ceramic coating and a preparation method and spraying method thereof. BACKGROUND

[0002] In the prior art, coating materials have a wide range of applications in industrial and civil fields, and they play an important role in improving the surface performance of materials and prolonging the service life of materials. Traditional coating materials such as metal coatings can provide good electrical conductivity and certain mechanical strength, but are prone to corrosion and have a limited service life in complex environments. Some organic resin coatings have certain corrosion resistance and good adhesion, but have poor high-temperature resistance and are poor in wear resistance and non-stickiness.

[0003] In the prior art, although metal coatings have high strength and good electrical conductivity and can effectively protect the substrate, they have deficiencies in corrosion resistance and high-temperature resistance, especially in humid or high-temperature environments, which can easily lead to corrosion and performance degradation, affecting their long-term use effect and reliability. Although organic resin coatings such as epoxy resin coatings have certain advantages in corrosion resistance and adhesion and can be tightly combined with various substrates, they have poor high-temperature resistance and are prone to softening, deformation or even decomposition under high-temperature conditions, and their wear resistance and non-stickiness cannot meet the stringent requirements of high-end industrial and civil fields. In addition, such coating materials also have certain limitations in the bonding strength and comprehensive performance synergy with the substrate.

[0004] Therefore, in order to meet the needs of high-end industrial and civil fields (especially kitchen fields) for coating materials in terms of high-temperature resistance, corrosion resistance, wear resistance, non-stickiness and other multifunctional integration, and to improve their biocompatibility and aesthetics, it is now necessary to make improvements to develop a high-performance ceramic coating and a preparation method and spraying method thereof, so as to improve the overall performance and use effect of the product and expand its application range. SUMMARY

[0005] In order to solve the technical problem that the service life of traditional organic resin coatings is low, and as the service life increases, the mechanical properties such as adhesion, corrosion resistance, temperature resistance, wear resistance and non-stickiness of the organic resin coatings will be significantly reduced, which cannot be applied to the kitchen technology field and cannot be used as the surface coating of kitchen utensils, the application provides a high-performance ceramic coating.

[0006] In order to solve the technical problem proposed in the application, the application also provides a preparation method of the high-performance ceramic coating.

[0007] In order to solve the technical problem proposed in the application, the application also provides a spraying method of the high-performance ceramic coating.

[0008] The application adopts the following scheme: a high-performance ceramic coating, consisting of the following components by weight fraction:

[0009] Binder 45-55 parts

[0010] Ceramic filler 5-10 parts

[0011] Functional additives 1-3 parts

[0012] Color paste 25-35 parts

[0013] Diluent 8-12 parts

[0014] Among them, the ceramic filler includes silicon carbide and zirconium oxide.

[0015] Among them, the mass ratio of silicon carbide to zirconium oxide is (4.8-5.5):3.

[0016] In some feasible embodiments,

[0017] The particle size of the silicon carbide ranges from 15μm to 26μm.

[0018] The particle size of the zirconium oxide ranges from 25μm to 35μm.

[0019] In actual implementation, when the ceramic coating is cured, the poly-methyl polysiloxane undergoes a cracking reaction, and the silicon carbide added as a filler can synergize with the cracking process of the poly-methyl polysiloxane, promoting the cracking reaction to generate more beneficial ceramic phases, thereby improving the degree of ceramicization of the coating.

[0020] In some feasible embodiments,

[0021] The binder includes poly-methyl polysiloxane and fumed silica.

[0022] Among them, the mass ratio of poly-methyl polysiloxane to fumed silica is (6.5-8.2):3.

[0023] In actual implementation, the addition of silicon carbide can improve the microstructure of the poly-methyl polysiloxane-based ceramic coating. Silicon carbide particles can form a supporting skeleton structure in the coating, filling the pores generated after the cracking of poly-methyl polysiloxane, reducing the porosity of the coating, improving the density and hardness of the coating, and ultimately enhancing the wear resistance and corrosion resistance of the coating.

[0024] In actual implementation, by doping zirconium oxide in silicon carbide, Si-O-Zr chemical bonds can be introduced to the supporting skeleton structure, significantly enhancing the bonding force between zirconium oxide and poly-methyl polysiloxane, allowing them to be more compatible, thereby significantly improving the overall performance of the coating.

[0025] Furthermore, zirconia can play a phase transformation toughening role in ceramic coatings. When the coating is subjected to external force or temperature change, zirconia will undergo phase transformation, absorb energy and inhibit the propagation of cracks, thereby improving the toughness and impact resistance of the coating. At the same time, the presence of zirconia particles can also affect the cracking behavior of polymethylpolysiloxane and the formation of ceramic phase, and regulate the microstructure of the ceramic coating, making the paint film more uniform and dense.

[0026] In actual implementation, fumed silica has a large specific surface area and surface activity. During the preparation of the coating, the silicon carbide particles will fill into the network structure of the fumed silica, which can increase the viscosity and thixotropy of the coating, prevent the sedimentation and aggregation of the silicon carbide particles, and make the coating have better construction performance and stability.

[0027] In actual implementation, fumed silica can modify the surface of zirconia particles to form a stable coating layer, preventing the agglomeration of zirconia particles in the coating. This not only improves the uniformity of dispersion of zirconia in the coating, but also helps to exert the excellent performance of zirconia, such as high hardness, high toughness and good thermal stability.

[0028] In some possible embodiments,

[0029] The functional additives include propylene glycol methyl ether and dimethyl silicone oil;

[0030] The mass ratio of the propylene glycol methyl ether to the dimethyl silicone oil is (0.5-1.2):1.

[0031] In some possible embodiments,

[0032] The diluents include isopropyl alcohol, cyclohexanone and ethylene glycol ethyl ether;

[0033] The mass ratio of the isopropyl alcohol, the cyclohexanone and the ethylene glycol ethyl ether is (2.8-3.3):1:1.

[0034] To solve the technical problems proposed in the present application, the present application further provides a preparation method of high-performance ceramic coating, comprising the following steps:

[0035] Step 101. Preparation of primer

[0036] According to the preset target ratio, the binder, the ceramic filler, the primer color paste, the functional additives and the diluents are sequentially put into a high-speed dispersing machine, and dispersed at 850 rpm-1250 rpm and 25℃-40℃ for 15 min-20 min to obtain the primer.

[0037] Step 102. Preparation of topcoat

[0038] The binder, ceramic filler, topcoat color paste, functional additive and diluent are sequentially put into a high-speed dispersion machine in a preset target ratio, and after being dispersed at 850 rpm-1250 rpm and 25°C-40°C for 15 min-20 min, a topcoat is obtained.

[0039] In some possible embodiments, the binders in steps 101 and 102 are subjected to a curing treatment.

[0040] The curing treatment comprises the following steps:

[0041] Step 201: The polymethylpolysiloxane and fumed silica are sequentially put into a curing barrel in a preset target ratio, and after being cured at a rolling speed of 120 rpm-150 rpm and room temperature for 4 h-6 h, a cured binder is obtained.

[0042] In actual implementation, through the curing treatment of the binder, the molecular chain segments in the binder will have sufficient time and energy for movement and recombination. Under the baking condition, the silicon-oxygen bonds (Si-O) in the polymethylpolysiloxane molecules can undergo crosslinking reaction. This is conducive to crosslinking to generate a three-dimensional network structure on the substrate, and significantly improves the mechanical strength of the paint film.

[0043] To solve the technical problems proposed in the present application, the present application further provides a spraying method of high-performance ceramic coating, comprising the following steps:

[0044] Step 301. Preheating

[0045] The substrate is preheated to 45°C-60°C.

[0046] Step 302. Primer spraying

[0047] The prepared primer is sprayed onto the substrate preheated in step 301.

[0048] Step 303. Topcoat spraying

[0049] The prepared topcoat is directly sprayed onto the primer sprayed in step 302.

[0050] Step 304. Baking

[0051] The substrate sprayed in steps 302 and 303 is transferred to a baking oven, and after being baked at 80°C-280°C for 20 min-25 min, a spraying of high-performance ceramic coating is completed.

[0052] In some possible embodiments, in step 302, the spraying thickness of the primer is 15 μm-30 μm; and the spraying thickness of the topcoat is 5 μm-10 μm.

[0053] In some possible embodiments, step 304 comprises a temperature rising baking section, a temperature holding baking section and a temperature falling section in time sequence;

[0054] The temperature rising baking section is to raise the temperature of the sprayed substrate to 280℃ at a temperature rising speed of 40℃ / min-50℃ / min;

[0055] The temperature holding baking section is to hold the temperature of the substrate at 280℃ for 15min-25min;

[0056] The temperature falling section is to lower the temperature of the substrate from 280℃ to room temperature under natural conditions.

[0057] Compared with the prior art, the application has the following beneficial effects:

[0058] The application provides a high-performance ceramic coating and a preparation method and a spraying method thereof, wherein the ceramic coating is composed of a binder, a ceramic filler, a functional additive, a color paste and a diluent, the ceramic filler contains silicon carbide and zirconia and the mass ratio of the two is (4.8-5.5):3. By designing the components and proportions of the ceramic coating, the components can play a synergistic effect. The specific proportion of the binder ensures that the coating has good adhesion, and the silicon carbide and zirconia in the ceramic filler are matched in a specific proportion to improve the hardness and wear resistance of the coating. The appropriate addition of the functional additive optimizes the comprehensive performance of the coating, the color paste ensures the color stability, and the diluent ensures the workability of the coating. The coating has the advantages of high hardness, excellent wear resistance, strong paint film adhesion, long service life, and is suitable for the kitchen technology field and easy to implement. DETAILED DESCRIPTION

[0059] The technical solutions provided by the application are further described in combination with specific embodiments. Embodiment 1

[0060] (1) A preparation method of a high-performance ceramic coating comprises the following steps:

[0061] Step 101. Preparation of primer

[0062] According to the component table shown in Table 1, the binder, the ceramic filler, the primer color paste, the functional additive and the diluent are sequentially put into a high-speed dispersing machine, and after being dispersed at 850 rpm and 25℃ for 15 min, the primer is obtained.

[0063] Step 102. Preparation of topcoat

[0064] According to the preset target proportion, the binder, the ceramic filler, the topcoat color paste, the functional additive and the diluent are sequentially put into a high-speed dispersing machine, and after being dispersed at 850 rpm and 25℃ for 15 min, the topcoat is obtained.

[0065] In step 101 and step 102, the binder and the color paste are subjected to a ripening treatment, which comprises the following steps:

[0066] Step 201. Put the polymethyl polysiloxane and fumed silica into a high-speed dispersing machine according to the component table shown in Table 1, and disperse at room temperature and 500 rpm for 10 min to obtain a to-be-ripened binder;

[0067] Step 202. Divide the to-be-ripened binder obtained in step 201 into two parts, and put one part into a ripening barrel, and ripen at a rolling speed of 80 rpm and room temperature for 4 h to obtain a ripened binder;

[0068] Step 203. Put the other part of the to-be-ripened binder and the primer color paste / topcoat color paste into the ripening barrel in turn, and ripen at a rolling speed of 80 rpm and room temperature for 30 min to obtain a ripened color paste.

[0069] (2) A spraying method of high-performance ceramic coating, comprising the following steps:

[0070] Step 301. Preheating

[0071] Preheat the substrate to 45°C;

[0072] Step 302. Primer spraying

[0073] Spray the prepared primer onto the substrate preheated in step 301, and the primer spraying thickness is 15 μm;

[0074] Step 303. Topcoat spraying

[0075] Directly spray the prepared topcoat onto the primer sprayed in step 302, and the topcoat spraying thickness is 5 μm;

[0076] Step 304. Baking

[0077] Transfer the substrate sprayed in step 302 and step 303 to a baking oven, and sequentially perform a temperature rising baking section, a temperature holding baking section and a cooling section in time sequence;

[0078] The temperature rising baking section is to rise the temperature of the sprayed substrate to 280°C at a temperature rising speed of 40°C / min;

[0079] The temperature holding baking section is to hold the temperature of the substrate at 280°C for 15 min;

[0080] The cooling section is to cool the substrate from 280°C to room temperature under natural conditions.

[0081] In steps 302 and 303, when the primer or topcoat is sprayed, the spray gun aperture is 1.0 mm, the spray pressure is 0.2 MPa, and the distance between the spray gun and the substrate is 25 cm. Before the primer or topcoat is sprayed, the prepared primer or topcoat is filtered with a 150-mesh filter. Example 2

[0082] (1) A method for preparing a high-performance ceramic coating includes the following steps:

[0083] Step 101. Preparation of primer

[0084] According to the component table shown in Table 1, the binder, ceramic filler, primer color paste, functional additive, and diluent are sequentially added to a high-speed dispersing machine, and after being dispersed at 1000 rpm and 30°C for 18 min, the primer is obtained.

[0085] Step 102. Preparation of topcoat

[0086] According to the preset target ratio, the binder, ceramic filler, topcoat color paste, functional additive, and diluent are sequentially added to a high-speed dispersing machine, and after being dispersed at 1000 rpm and 30°C for 18 min, the topcoat is obtained.

[0087] In steps 101 and 102, the binder and the color paste are subjected to aging treatment, which includes the following steps:

[0088] Step 201. According to the component table shown in Table 1, polymethylpolysiloxane and fumed silica are added to a high-speed dispersing machine, and after being dispersed at room temperature and 550 rpm for 10 min, the aged binder is obtained.

[0089] Step 202. The aged binder obtained in step 201 is divided into two equal parts, and one part is added to an aging barrel, and after being aged at a rolling speed of 100 rpm and room temperature for 5 h, the aged binder is obtained.

[0090] Step 203. The other part of the aged binder and the primer color paste / topcoat color paste are sequentially added to the aging barrel, and after being aged at a rolling speed of 100 rpm and room temperature for 40 min, the aged color paste is obtained.

[0091] (2) A method for spraying a high-performance ceramic coating includes the following steps:

[0092] Step 301. Preheating

[0093] The substrate is preheated to 50°C.

[0094] Step 302. Primer spraying

[0095] The prepared primer is sprayed on the substrate preheated in step 301, and the primer spraying thickness is 20 μm;

[0096] Step 303. Topcoat spraying

[0097] The prepared topcoat is directly sprayed on the primer sprayed in step 302, and the topcoat spraying thickness is 8 μm;

[0098] Step 304. Baking

[0099] The substrate sprayed in step 302 and step 303 is transferred to a baking furnace, and the temperature rising baking section, the temperature holding baking section and the temperature decreasing section are sequentially performed in time sequence;

[0100] The temperature rising baking section is to rise the temperature of the sprayed substrate to 280℃ at a temperature rising speed of 45℃ / min;

[0101] The temperature holding baking section is to hold the temperature of the substrate at 280℃ for 20 min;

[0102] The temperature decreasing section is to decrease the temperature of the substrate from 280℃ to room temperature under natural conditions.

[0103] In step 302 and step 303, when the primer or topcoat is sprayed, the spraying gun caliber is 1.0 mm, the spraying pressure is 0.2 MPa, the distance between the spraying gun and the substrate is 25 cm, and before the primer or topcoat is sprayed, the prepared primer or topcoat is filtered by a 150-mesh filter screen. Example 3

[0104] (1) A preparation method of a high-performance ceramic coating includes the following steps:

[0105] Step 101. Preparation of primer

[0106] According to the component table shown in Table 1, the binder, ceramic filler, primer color paste, functional additive and diluent are sequentially put into a high-speed dispersing machine, and after being dispersed at 1250 rpm and 40℃ for 20 min, the primer is obtained;

[0107] Step 102. Preparation of topcoat

[0108] According to the preset target ratio, the binder, ceramic filler, topcoat color paste, functional additive and diluent are sequentially put into a high-speed dispersing machine, and after being dispersed at 1250 rpm and 40℃ for 20 min, the topcoat is obtained.

[0109] In step 101 and step 102, the binder and the color paste are subjected to aging treatment, and the aging treatment includes the following steps:

[0110] Step 201. Put the polymethyl polysiloxane and fumed silica into a high-speed dispersion machine according to the component table shown in Table 1, and disperse at room temperature and 600 rpm for 10 min to obtain a to-be-cured binder;

[0111] Step 202. Divide the obtained to-be-cured binder prepared in step 201 into two parts, and put one part into a curing barrel, and cure at a rolling speed of 120 rpm at room temperature for 6 h to obtain a cured binder;

[0112] Step 203. Put the other part of the to-be-cured binder and the primer color paste / topcoat color paste into the curing barrel in turn, and cure at a rolling speed of 120 rpm at room temperature for 50 min to obtain a cured color paste.

[0113] (2) A spraying method of high-performance ceramic paint, comprising the following steps:

[0114] Step 301. Preheating

[0115] Preheat the substrate to 60°C;

[0116] Step 302. Primer spraying

[0117] Spray the prepared primer onto the substrate preheated in step 301, and the primer spraying thickness is 30 μm;

[0118] Step 303. Topcoat spraying

[0119] Directly spray the prepared topcoat onto the primer sprayed in step 302, and the topcoat spraying thickness is 10 μm;

[0120] Step 304. Baking

[0121] Transfer the substrate sprayed in step 302 and step 303 to a baking oven, and sequentially perform a temperature rising baking section, a temperature holding baking section and a cooling section in time sequence;

[0122] The temperature rising baking section is to rise the temperature of the sprayed substrate to 280°C at a temperature rising speed of 50°C / min;

[0123] The temperature holding baking section is to hold the temperature of the substrate at 280°C for 25 min;

[0124] The cooling section is to cool the substrate from 280°C to room temperature under natural conditions.

[0125] In step 302 and step 303, when the primer or topcoat is sprayed, the spray gun caliber is 1.0 mm, the spraying pressure is 0.2 MPa, the distance between the spray gun and the substrate is 25 cm, and before the primer or topcoat is sprayed, the prepared primer or topcoat is filtered with a 150-mesh filter screen.

[0126] Table 1 Component parameter table of Examples 1-3

[0127] Component / Parameter Example 1 Example 2 Example 3 Total Binder 45 parts 50 parts 55 parts Polymethylpolysiloxane 30.79 parts (mass ratio 6.5:3) 35.48 parts (mass ratio 7.35:3) 40.80 parts (mass ratio 8.2:3) Fumed Silica 14.21 parts 14.52 parts 14.20 parts Total Ceramic Filler 5 parts 7.5 parts 10 parts Silicon Carbide 3.08 parts (particle size 15 μm, mass ratio 4.8:3) 4.74 parts (particle size 20.5 μm, mass ratio 5.15:3) 6.47 parts (particle size 26 μm, mass ratio 5.5:3) Zirconium Oxide 1.92 parts (particle size 25 μm) 2.76 parts (particle size 30 μm) 3.53 parts (particle size 35 μm) Total Functional Adjuvant 1 part 2 parts 3 parts Propylene Glycol Methyl Ether 0.33 parts (mass ratio 0.5:1) 0.92 parts (mass ratio 0.85:1) 1.64 parts (mass ratio 1.2:1) Dimethyl Silicone Oil 0.67 parts 1.08 parts 1.36 parts Color Paste 25 parts 30 parts 35 parts Total Diluent 8 parts 10 parts 12 parts Isopropyl Alcohol 4.67 parts (mass ratio 2.8:1:1) 6.04 parts (mass ratio 3.05:1:1) 7.51 parts (mass ratio 3.3:1:1) Cyclohexanone 1.67 parts 1.98 parts 2.26 parts Ethylene Glycol Ethyl Ether 1.67 parts 1.98 parts 2.26 parts

[0128] The sand-free ceramic coating prepared in Examples 1-3 was subjected to the following tests:

[0129] Test 1: The total thickness of the paint film was measured using a paint film thickness tester;

[0130] Test 2: The gloss of the paint film was measured using a gloss tester;

[0131] Test 3: The pencil hardness of the paint film was measured in accordance with the provisions of GB / T 6739-2006;

[0132] Test 4: The adhesion grade of the paint film was measured in accordance with the provisions of GB / T 1720-2020;

[0133] Test 5: The abrasion resistance of the paint film was tested by rubbing the paint film with a 3M744C type Scotch-Brite pad under a load of 4.5 kg, and recording the number of rubs required to produce a scratch;

[0134] Test 6: The salt water resistance of the paint film was tested by immersing the substrate with the paint film in salt water (5% NaCl) at 80°C for continuous boiling for 24 hours, 48 hours, and 72 hours, removing the substrate after the boiling immersion was complete, and inspecting the overall paint film;

[0135] Test 7: The glacial acetic acid resistance of the paint film was tested by immersing the substrate with the paint film in glacial acetic acid (5%) for continuous boiling for 24 hours, 48 hours, and 72 hours, removing the substrate after the boiling immersion was complete, and inspecting the overall paint film;

[0136] Test 8: The alkali resistance of the paint film was tested by immersing the substrate with the paint film in sodium carbonate (5%) at room temperature for 24 hours, 48 hours, and 72 hours, removing the substrate after the immersion was complete, and inspecting the overall paint film;

[0137] Test 9: The paint film on the substrate was placed in a dishwasher, the dishwasher was started, the substrate was removed from the dishwasher every 5 hours, and the overall condition of the paint film on the substrate was inspected. If the paint film showed no obvious abnormalities, the substrate was placed back in the dishwasher, the dishwasher was started again, and this process was repeated until the paint film showed abnormalities;

[0138] Test 10: The temperature resistance of the paint film was tested by placing the substrate with the paint film in an oven heated to 400°C for 24 hours, removing the substrate after the heating was complete, and inspecting the overall condition of the paint film.

[0139] During the test, the ceramic coatings prepared in Examples 1-3 were sprayed on the same specification aluminum alloy substrates.

[0140] The aluminum alloy substrates were all subjected to 60-80 mesh brown corundum sand blasting treatment, and the surface Ra of the aluminum alloy substrate after sand blasting treatment was 2.5-4.0 μm. The test results are shown in Table 2 below.

[0141] Table 2 Test results of Examples 1-3

[0142] Test Item Example 1 Example 2 Example 3 Total Film Thickness (μm) 20 μm 28 μm 40 μm Gloss (°) 38° 42° 39° Pencil Hardness 9H 9H 9H Adhesion Rating 0 Grade 0 Grade 0 Grade Wear Resistance (times) 5899 6004 5973 Salt Water Resistance (5% NaCl, 24 h) No abnormality No abnormality No abnormality Salt Water Resistance (5% NaCl, 48 h) No abnormality No abnormality No abnormality Salt Water Resistance (5% NaCl, 72 h) No abnormality No abnormality No abnormality Acid Resistance (5% glacial acetic acid, 24 h) No abnormality No abnormality No abnormality Acid Resistance (5% glacial acetic acid, 48 h) No abnormality No abnormality No abnormality Acid Resistance (5% glacial acetic acid, 72 h) No abnormality No abnormality No abnormality Alkali Resistance (5% sodium carbonate, 24 h) No abnormality No abnormality No abnormality Alkali Resistance (5% sodium carbonate, 48 h) No abnormality No abnormality No abnormality Alkali Resistance (5% sodium carbonate, 72 h) No abnormality No abnormality No abnormality Dishwasher Test No abnormality No abnormality No abnormality Temperature Resistance Test No abnormality No abnormality No abnormality

[0143] As can be seen from the test results in Table 2, the present application provides a high-performance ceramic coating and a preparation method and spraying method thereof, wherein the ceramic coating is composed of a binder, a ceramic filler, a functional additive, a color paste, and a diluent. The ceramic filler contains silicon carbide and zirconia, and the mass ratio of the two is (4.8-5.5):3. By adjusting the ratio of polymethylpolysiloxane and fumed silica in the binder, the cross-linking density of the coating can be effectively improved, forming a uniform organic-inorganic hybrid network on the surface of the substrate, significantly improving the compactness and temperature resistance of the coating. By adjusting the ratio of silicon carbide and zirconia in the ceramic filler, a uniform reinforcing framework can be formed in the coating, significantly improving the hardness and acid, salt, and alkali resistance of the coating. By adjusting the ratio of propylene glycol methyl ether and dimethyl silicone oil in the functional additive, the wettability of each component in the coating can be effectively improved, significantly reducing the porosity of the coating and significantly improving the interfacial bonding capacity of the coating and the substrate. By adjusting the ratio of isopropyl alcohol, cyclohexanone, and ethylene glycol ethyl ether in the diluent, setting the volatilization gradient of the diluent, further reducing the porosity of the coating, and improving the gloss of the paint film, the coating has the advantages of high hardness, excellent wear resistance, strong paint film adhesion, long service life, and is suitable for use in the kitchen technology field, facilitating implementation and promotion.

[0144] The above provides a detailed description of the embodiments of the present application. The specific examples are applied to describe the principles and implementation methods of the present application. The above description of the embodiments is only used to help understand the method and core idea of the present application. It should be noted that for ordinary skilled persons in the technical field, without departing from the principles of the present application, the present application can be improved and modified. These improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A method of spraying a high performance ceramic coating, characterized in that, The high-performance ceramic coating is composed of the following components in parts by weight: 45-55 parts adhesive; 5-10 parts ceramic filler; Functional additives: 1-3 parts; 25-35 parts color paste; 8-12 parts diluent; The ceramic filler includes silicon carbide and zirconium oxide; The mass ratio of silicon carbide to zirconium oxide is (4.8-5.5):3; The adhesive includes polymethylpolysiloxane and fumed silica; The mass ratio of the polymethylpolysiloxane to the fumed silica is (6.5-8.2):

3. The method for preparing a high-performance ceramic coating includes the following steps: Step 101. Primer Preparation According to the preset target ratio, the binder, ceramic filler, primer pigment, functional additives and diluent are put into the high-speed disperser in sequence and dispersed for 15min-20min at 850rpm-1250rpm and 25℃-40℃ to obtain the primer. Step 102. Topcoat Preparation According to the preset target ratio, the binder, ceramic filler, topcoat color paste, functional additives and diluent are sequentially added into the high-speed disperser and dispersed for 15min-20min at 850rpm-1250rpm and 25℃-40℃ to obtain the topcoat. The method for spraying a high-performance ceramic coating includes the following steps: Step 301. Preheating Preheat the substrate to 45℃-60℃; Step 302. Primer spraying Spray the prepared primer onto the preheated substrate from step 301; Step 303. Topcoat Spraying Spray the prepared topcoat directly onto the primer sprayed in step 302; Step 304. Baking The substrate after spraying in steps 302 and 303 is transferred to a baking oven and baked at 80℃-280℃ for 20-25 minutes to complete the spraying of a high-performance ceramic coating. In step 302, the thickness of the primer spray is 15μm-30μm; the thickness of the topcoat spray is 5μm-10μm. Step 304 includes a heating and baking section, a heat preservation and baking section, and a cooling section performed sequentially in time. The heating and baking section heats the coated substrate to 280°C at a heating rate of 40°C / min-50°C / min. The heat preservation and baking section involves keeping the substrate at 280℃ for 15-25 minutes. The cooling section involves cooling the substrate from 280°C to room temperature under natural conditions.

2. The method for spraying a high-performance ceramic coating according to claim 1, characterized in that, The particle size range of the silicon carbide is 15μm-26μm; The zirconium oxide has a particle size range of 25 μm to 35 μm.

3. The method for spraying a high-performance ceramic coating according to claim 1, characterized in that, The functional additives include propylene glycol methyl ether and dimethyl silicone oil; The mass ratio of propylene glycol methyl ether to dimethyl silicone oil is (0.5-1.2):

1.

4. The method for spraying a high-performance ceramic coating according to claim 1, characterized in that, The diluents include isopropanol, cyclohexanone, and ethylene glycol ethyl ether; The mass ratio of isopropanol, cyclohexanone, and ethylene glycol ethyl ether is (2.8-3.3):1:

1.

5. The method for spraying a high-performance ceramic coating according to claim 1, characterized in that, In steps 101 and 102, the adhesive undergoes a curing treatment. The aging process includes the following steps: Step 201: According to the preset target ratio, polymethylpolysiloxane and fumed silica are sequentially added to the curing tank. After curing at room temperature for 4-6 hours with a rolling speed of 120-150 rpm, the cured adhesive is obtained.