Long-term high temperature resistant non-stick ceramic coating, method of making and non-stick coating made thereby

Abstract

The application belongs to the technical field of non-stick coating and relates to long-term high-temperature-resistant non-stick ceramic coating, a preparation method and a non-stick coating layer prepared by the method. The method realizes the long-term high-temperature-resistant characteristic of the non-stick ceramic coating after coating by adopting hexamethyldisilazane grafted modified silica sol, preparing the modified silica sol first and then applying the modified silica sol to the preparation of the non-stick ceramic coating. The ceramic coating layer prepared by the long-term high-temperature-resistant non-stick ceramic coating of the application mainly provides a large number of methyl (-CH3) groups by the hexamethyldisilazane grafted modified silica sol, and the non-stick durability is better, and the high-temperature-resistant non-stick property and the wear-resistant non-stick property are also better.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of non-stick coatings, and relates to a long-term high-temperature-resistant non-stick ceramic coating, a preparation method thereof and a non-stick coating made of the same. BACKGROUND

[0002] The ceramic coating is an inorganic coating with a si-o-si cross-linked structure similar to ceramic or glass formed by hydrolysis and polymerization of silica sol and siloxane under the catalysis of an organic acid. The ceramic coating has very good high-temperature resistance, does not decompose at high temperatures and does not release toxic gases, and has high hardness, good wear resistance and non-stickiness. However, the non-stick durability of the ceramic coating is slightly inferior to that of the water-based fluorine-containing coating. The non-stickiness of the ceramic coating mainly comes from the methyl (-CH3) groups on the surface of the coating. Since the methyl (-CH3) groups are currently provided by the silicon oil in the components, the number of the methyl (-CH3) groups on the surface will gradually decrease due to wear at high temperatures or during cooking. In addition, the proportion of the silicon oil added in the ceramic coating is very low. If the proportion is too high, floating oil will appear, which will seriously affect the performance of the ceramic coating. Therefore, the non-stick durability of the ceramic coating is relatively poor compared with that of the water-based fluorine-containing coating.

[0003] CN201510954017 discloses a water-based ceramic non-stick coating for the surface of kitchen utensils and a preparation method thereof. The coating is in the form of a combination of a ceramic non-stick coating resin and a polytetrafluoroethylene resin, and relies on the non-stick additives in the ceramic coating to provide initial non-stickiness and fluorocarbon resin to provide non-stick durability. However, the invention has compatibility problems when the ceramic resin and the fluorocarbon resin are combined. Since the two resins have different surface tensions, they are prone to layering. In addition, due to the PFAS regulations, fluorine-containing products will be subject to many restrictions or even be banned.

[0004] CN112759963A discloses a non-stick ceramic coating for cookware and a preparation method thereof. The coating uses silicon oil with different molecular weights to improve the non-stick performance. The silicon oil in the coating is expected to float up to supplement the non-stick performance after the silicon oil on the upper part of the coating is lost. Although this method can improve the non-stick performance to some extent, the total amount of silicon oil added is very low. The number of methyl (-CH3) groups on the surface will decrease rapidly due to wear at high temperatures or during cooking. This is the main reason for the decrease in non-stickiness of the ceramic coating after a period of use. At the same time, since the small molecular weight silicon oil has a certain compatibility in water, it can be easily carried away by water flow during cleaning and use, so it cannot achieve long-term non-stick performance. SUMMARY

[0005] The application aims to provide a preparation method of long-term high-temperature-resistant non-stick ceramic coating, which realizes the long-term high-temperature-resistant characteristic of the non-stick ceramic coating after coating by adopting hexamethyldisilazane graft modification of silica sol, and then applying the modified silica sol to the preparation of the non-stick ceramic coating.

[0006] The technical scheme adopted by the application to solve the technical problems is:

[0007] The application discloses a preparation method of long-term high-temperature-resistant non-stick ceramic coating.

[0008] S1, hexamethyldisilazane and silica sol are stirred and reacted at 20-60 DEG C for 4-16 h to obtain modified silica sol containing methyl on the surface, and then a proper amount of filler, pigment and dispersant are added, high-speed dispersion is carried out, and then the ceramic coating A component is prepared; the addition amount of hexamethyldisilazane is 2-14% based on 100% of the weight of the silica sol;

[0009] S2, siloxane, silicone oil, catalyst and silane coupling agent are mixed to prepare the ceramic coating B component;

[0010] The raw material weight ratio of the B component is as follows: 45-98 parts of siloxane, 0-10 parts of silicone oil, 0-3 parts of catalyst and 0-5 parts of silane coupling agent, and the total weight of the raw material components is 100 parts;

[0011] S3, the B component is added into the A component, and rolling curing is carried out, and then the mixture is prepared;

[0012] The A component and the B component are mixed according to the weight ratio of 1:1-3:1;

[0013] S4, a proper amount of leveling agent, solvent and other additives are mixed to prepare the ceramic coating C component;

[0014] S5, the mixture after curing obtained in S3 is mixed with the C component before use to obtain the ceramic coating; the addition weight of the C component is 2%-10% based on 100% of the total weight of the mixture after curing obtained in S3.

[0015] The chemical formula of the silica sol is shown in the formula (I), the reaction mechanism of the hexamethyldisilazane graft modified silica sol to obtain the modified silica sol containing methyl (-CH3) is shown in the formula (II), and the formula (III) shows the reaction mechanism of the hexamethyldisilazane graft modified silica sol to obtain the modified silica sol containing methyl (-CH3). Figure 1 Figure 2 Firstly, the hexamethyldisilazane is hydrolyzed into trimethylsiloxane in water; then, the trimethylsiloxane reacts with the hydroxyl on the surface of the silica sol to be dehydrated to obtain the modified silica sol containing methyl (-CH3) on the surface.

[0016] ​As preferred, the amount of hexamethyldisilazane added is 4-10%, more preferably 4-8%, based on 100% of the weight of the silica sol. In this case, the amount of catalyst in the raw material formula of the B component is 0, and the optimal effect of high-temperature non-stick and wear-resistant non-stick performance of the ceramic coating can be achieved.

[0017] As preferred, the weight ratio of the A component to the B component is 1.6:1-2:1. Under the preferred weight ratio condition, the internal structure of the ceramic coating can be more compact, and the coating will not be too brittle to cause cracking.

[0018] As preferred, the amount of hexamethyldisilazane added is 2-10%, based on 100% of the weight of the silica sol.

[0019] As preferred, the formula of the A component of the ceramic coating is:

[0020] The modified silica sol is 40-99 parts, the filler is 0-30 parts, the pigment is 0-30 parts, the dispersing agent is 0-5 parts, and the total weight of each raw material component is 100 parts;

[0021] The filler is selected from one or more of barium sulfate, aluminum oxide, mica powder, white carbon black, talc powder, ceramic powder, whisker silicon, silicon powder, and quartz powder;

[0022] The pigment is selected from one or more of titanium dioxide, iron oxide black, carbon black, copper-chromium black, manganese-iron black, iron oxide yellow, phthalocyanine blue, phthalocyanine green, titanium yellow, bismuth yellow, iron oxide red, cobalt blue, cobalt green, iron oxide green, pearl pigment, and metal pigment.

[0023] As preferred, the silica sol is an alkaline silica sol, the solid mass fraction of the silica sol is 20%-40%, and the particle size is 6-60 nm.

[0024] As preferred, the catalyst is one or more of formic acid, acetic acid, propionic acid, and citric acid;

[0025] The siloxane is one or more of methyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, dimethyldiethoxysilane, dimethyldimethoxysilane, methylphenyldimethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, vinyltriethoxysilane, phenyltrimethoxysilane, and phenyltriethoxysilane;

[0026] The silicone oil is selected from one or more of dimethyl silicone oil, hydroxyl silicone oil, hydrogen-containing silicone oil, phenolic hydroxyl silicone oil, amino silicone oil, alcohol hydroxyl silicone oil, and mercapto silicone oil.

[0027] As preferred, the rolling curing in S3 has a rolling speed of 1000 rpm-1600 rpm, a curing temperature of 10-30°C, and a curing time of 4-12 h.

[0028] As preferred, the raw material weight ratio of the C component is: leveling agent: 10-40 parts, solvent: 30-80 parts, other additives: 0-10 parts, and the total weight of each raw material component is 100 parts.

[0029] As preferred, the preparation method of the long-term high-temperature-resistant non-stick ceramic coating is specifically as follows:

[0030] S1, preparation of modified silica sol: the silica sol is stirred and reacted with hexamethyl disilazane at 50-60°C for 6-10h to obtain the modified silica sol; the addition amount of hexamethyl disilazane is 4-8% based on 100% of the weight of the silica sol;

[0031] S2, preparation of A, B and C components:

[0032] Preparation of A component: 68kg of modified silica sol, 1kg of dispersant, 3kg of mica, 8kg of titanium white, 6kg of silica powder, and 14kg of copper-chromium black are sequentially added to a stirring container, stirred and dispersed at a speed of 1000-2000rpm for 30min, and then ground by a grinder to a fineness of less than 10μm to obtain the A component;

[0033] Preparation of B component: 40kg of methyltrimethoxysilane, 6kg of methyltriethoxysilane, 10kg of methylphenyldimethoxysilane, 1kg of silane coupling agent and 2kg of dimethyl silicone oil are uniformly mixed and stirred to obtain the B component;

[0034] Preparation of C component: 8kg of isopropyl alcohol and 2kg of leveling agent are uniformly mixed to obtain the C component;

[0035] S3, preparation of ceramic coating: the A component and the B component are mixed at a weight ratio of 5:3, stirred at a speed of 1200-1500rpm by using a high-speed disperser at room temperature for 6-10h to fully hydrolyze the silane and the silicone oil and to moderately cross-link and mature, and the C component is added to the A / B mixed solution before use, uniformly stirred to obtain the non-stick ceramic coating; the addition amount of the C component is 6-8% of the weight of the A / B mixed solution, based on 100% of the total weight of the A / B mixed solution.

[0036] A non-stick ceramic coating prepared by the preparation method.

[0037] The application of the long-term high-temperature-resistant non-stick ceramic coating in the preparation of non-stick kitchen utensils, including frying pans, woks, soup pots, rice cookers, ovens and smoke machines.

[0038] As preferred, the ceramic coating of claim 1 is sprayed onto the kitchen utensil by using a pneumatic spraying method, the thickness of the coating is controlled to be 30-40 microns, and then the coating is baked at 280℃±50℃ for 15-30 minutes to obtain a long-term high-temperature-resistant non-stick ceramic coating.

[0039] Compared with the prior art, the present application has the following beneficial effects:

[0040] The biggest disadvantage of the existing ceramic coating is that the non-stick performance is not good enough in durability. With the abrasion at high temperature or during cooking, the number of methyl (-CH3) groups provided by the addition of a small amount of silicone oil to the ceramic coating will gradually decrease and soon be consumed. The ceramic coating prepared by the coating of the present application mainly provides a large number of methyl (-CH3) groups by grafting modification of the silicon sol with hexamethyldisilazane, and thus has better non-stick durability, better high-temperature-resistant non-stickness and better abrasion-resistant non-stickness. Moreover, the reaction conditions in the present application are simple, the preparation process is simple, the environment is friendly, mass production is easy, and the present application has high application value. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is the chemical formula of the silicon sol;

[0042] Figure 2 is the reaction mechanism diagram for obtaining the modified silicon sol containing methyl (-CH3) by grafting modification of the silicon sol with hexamethyldisilazane;

[0043] Figure 3 is the Fourier infrared spectrum of the silicon sol and the silicon sol after grafting modification with hexamethyldisilazane; wherein A001 is the unmodified silicon sol (comparative example 1), and A002 is the silicon sol after grafting modification with hexamethyldisilazane according to example 1. DETAILED DESCRIPTION

[0044] The technical solutions of the present application will be further described below through specific examples. It should be understood that the implementation of the present application is not limited to the following examples, and any form of variation and / or change of the present application will fall within the scope of protection of the present application.

[0045] In the present application, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used can be purchased from the market or are commonly used in the art. The methods in the following examples are conventional methods in the art, unless otherwise specified.

[0046] The reagents used in the following examples can be purchased from conventional biochemical reagent stores, unless otherwise specified.

[0047] The basic silicon sol used in the examples is a basic silicon sol produced by Qingdao Fushang Refining and Processing Co., Ltd., with a pH value of 9-11, a solid content of 29-31%, and a particle size range of 9-15 nm.

[0048] Dispersant BYK-2012, purchased from BYK-Chemie Technology Consulting (Shanghai) Co., Ltd.;

[0049] Copper-chromium black, purchased from Shanghai Jingchi New Material Co., Ltd.;

[0050] KH560, purchased from Hangzhou Jessica Chemical Co., Ltd.;

[0051] Leveling agent BYK-333, purchased from Shanghai Jingchi New Material Co., Ltd.;

[0052] The performance testing methods of the ceramic non-stick coating are as follows:

[0053] 1. The coating thickness test refers to the test method in 6.2.3 of GB / T 32095.2-2015.

[0054] 2. The egg non-stick test refers to the test method in 4.2.1 of GB / T 32095.2-2015. The specific test method is:

[0055] Wash the flat-bottomed pot with warm water above 60℃ with a neutral detergent, then rinse it clean with clean water and dry it; raise the temperature of the flat-bottomed pot to 150-170℃, put the fresh eggs into the flat-bottomed pot after breaking the shells, and then use a silica gel spatula to take out the eggs completely after the egg white is basically solidified.

[0056] The evaluation method is described in 5.1.1 of GB / T 32095.2-2015.

[0057]

[0058] 3. The coating high-temperature non-stick test method: put the flat-bottomed pot into the oven preheated to 300℃, and place it for 1 hour, then slowly cool it at room temperature. After cleaning, test the egg non-stick property to evaluate the non-stick property, and non-stick property reaching level II or above is considered to complete one cycle. Repeat the test until the non-stick property cannot reach level II, end the test, and record the cycle number.

[0059] 4. The coating wear resistance test refers to the test method in 4.3.1 of GB / T 32095.2-2015. The specific test method is: place the flat-bottomed pot on the wear tester, set the frequency to 33 times / min, apply a downward force of 15N, use a 70±5mm long and 30±5mm wide scouring pad (3M7447B) to move back and forth 100mm as one friction, and replace the scouring pad every 500 times of friction;

[0060] 5. Coating wear resistance and non-stick test method: Place a flat-bottomed pot on the wear tester, set the frequency to 33 times / min, apply a downward force of 15N, use a 70±5mm long, 30±5mm wide scouring pad (3M7447B) to move back and forth 100mm as one friction, after every 500 frictions, clean and then test the egg non-stickiness to evaluate the non-stickiness. Non-stickiness reaching level II or above is considered to complete one cycle. Replace the scouring pad and start the next 500 frictions, then clean and test the egg non-stickiness to evaluate the non-stickiness. Repeat the test until the non-stickiness cannot reach level II, end the test and record the cycle number.

[0061] Examples 1-4

[0062] A method for preparing a long-term high-temperature-resistant non-stick ceramic coating, the specific steps are as follows:

[0063] 1. Preparation of modified silica sol: Add different weights of hexamethyldisilazane to the silica sol, stir and react at 50°C for 6h to obtain the modified silica sol. The formulation and amount of each example are shown in Table 1.

[0064] 2. Preparation of A, B and C components:

[0065] Preparation of A component: Add 68kg of modified silica sol, 1kg of dispersant BYK-2012, 3kg of mica, 8kg of titanium white, 6kg of silica powder, and 14kg of copper-chromium black to a stirring container in sequence, stir and disperse at a speed of 1000-2000rpm for 30min, then pass through a grinder to grind the material to a fineness of less than 10μm to obtain the A component.

[0066] Preparation of B component: Mix 40kg of methyltrimethoxysilane, 6kg of methyltriethoxysilane, 10kg of methylphenyldimethoxysilane, 1kg of silane coupling agent KH560, 2kg of dimethyl silicone oil, 0.6kg of formic acid, and 0.4kg of acetic acid uniformly to obtain the B component.

[0067] Preparation of C component: Mix 8kg of isopropyl alcohol and 2kg of leveling agent BYK-333 uniformly to obtain the C component.

[0068] 3. Preparation of ceramic coating: Mix the A component and the B component at a weight ratio of 5:3, stir at room temperature using a high-speed disperser at a speed of 1200rpm-1500rpm for 6h to fully hydrolyze the silane and silicone oil and allow moderate crosslinking and curing, before use, add the C component to the A / B mixture, stir uniformly to obtain the non-stick ceramic coating. The addition amount of the C component is 6.25% of the weight of the A / B mixture, based on the total weight of the A / B mixture being 100%.

[0069] Preparation of ceramic coating: The prepared ceramic coating was sprayed onto the flat bottom pot by pneumatic spraying, the thickness of the coating was controlled to be 30-40 microns, and then the ceramic coating was baked at 280°C for 15 min to obtain the long-term high-temperature-resistant non-stick ceramic coating.

[0070] Comparative Example 1

[0071] The unmodified silica sol was used instead of the modified silica sol to prepare the coating, and the preparation method was the same as that in Example 1.

[0072] Table 1: Raw material ratio

[0073]

[0074]

[0075] The ceramic coatings prepared in Examples 1-4 and Comparative Example 1 were tested for relevant properties, and the test results are shown in Table 2.

[0076] Table 2: Properties of the ceramic coatings prepared in Examples 1-4 and Comparative Example 1

[0077] Performance Film thickness High temperature resistance non-stick Wear resistance non-stick Comparative Example 1 35-40 μm 35 cycles 7 cycles Example 1 35-40 μm 34 cycles 7 cycles Example 2 35-40 μm 47 cycles 9 cycles Example 3 35-40 μm 41 cycles 8 cycles Example 4 35-40 μm 29 cycles 5 cycles

[0078] As can be seen from Table 2, the high-temperature-resistant non-stick properties and the wear-resistant non-stick properties of the ceramic coatings prepared in Examples 1-4 and Comparative Example 1 changed little; it is possible that the ammonia gas produced by the hydrolysis of hexamethyldisilazane reacts with the catalyst formic acid to form ammonium hydroxide in water, which causes the coating to mature poorly, and the reaction between acid and base releases a large amount of heat, which also has a great impact on the coating.

[0079] Therefore, on this basis, a new formula was redesigned without adding a catalyst.

[0080] Examples 5-11

[0081] The preparation method was the same as that in Example 1, except that no formic acid and acetic acid were added as catalysts (Examples 1-4 and Comparative Example 1 contained 0.6 kg of formic acid and 0.4 kg of acetic acid in the B component).

[0082] In this example, the ammonia gas produced by the modification of the silica sol with hexamethyldisilazane was used as the catalyst, and the amounts of the components in the formula of each example are shown in Table 3.

[0083] Table 3: Raw material ratio

[0084]

[0085]

[0086] Figure 3are the Fourier infrared spectrograms of the silica sol and the silica sol grafted and modified by hexamethyldisilazane. Figure 3 From the infrared spectrogram of the modified silica sol, it can be seen that the modified silica sol has an additional absorption peak at 2959 cm -1 , which is derived from the symmetric / anti-symmetric stretching vibration of methyl and methylene.

[0087] The ceramic coatings prepared in Examples 5-11 and Comparative Example 1 were subjected to relevant performance tests, and the test results are shown in Table 4.

[0088] Table 4 Performance indicators of the ceramic coatings prepared in Examples 5-11 and Comparative Example 1

[0089] Performance Film thickness High temperature resistance non-stick Wear resistance non-stick Comparative Example 1 35-40 μm 35 cycles 7 cycles Example 5 35-40 μm 44 cycles 8 cycles Example 6 35-40 μm 56 cycles 10 cycles Example 7 35-40 μm 65 cycles 13 cycles Example 8 35-40 μm 61 cycles 11 cycles Example 9 35-40 μm 51 cycles 9 cycles Example 10 35-40 μm 34 cycles 6 cycles Example 11 35-40 μm 29 cycles 4 cycles Example 12 35-40 μm 24 cycles 3 cycles Example 13 35-40 μm 19 cycles 2 cycles Example 14 35-40 μm 14 cycles 1 cycle Example 15 35-40 μm 9 cycles 0 cycles Example 16 35-40 μm 4 cycles 0 cycles Example 17 35-40 μm 0 cycles 0 cycles

[0090] As can be seen from Table 4, compared with Comparative Example 1, the high-temperature non-stick performance and the wear-resistant non-stick performance of the ceramic coatings of Examples 5-9 are greatly improved; and compared with Comparative Example 1, the high-temperature non-stick performance and the wear-resistant non-stick performance of Example 7 are improved by nearly one time. Compared with Comparative Example 1, the high-temperature non-stick performance and the wear-resistant non-stick performance of the coatings of Examples 10-11 are actually reduced. After analysis, it is found that when the proportion of hexamethyldisilazane is too high, more ammonia water is generated, and the basicity of the coating is too large, which actually damages the performance of the coating. That is, the ceramic coating prepared by grafting and modifying the silica sol with an appropriate amount of hexamethyldisilazane has better non-stick performance, including high-temperature non-stick performance and wear-resistant non-stick performance.

[0091] The present application introduces a large amount of methyl (-CH3) into the ceramic coating by grafting and modifying the silica sol with hexamethyldisilazane, that is, the content of methyl (-CH3) on the surface of the ceramic coating is increased, thereby greatly improving the non-stick performance of the ceramic coating.

[0092] The present application grafts and modifies the silica sol with hexamethyldisilazane, and thus eliminates the need for adding a catalyst as a raw material and a process in the formulation and process of preparing the ceramic coating. Since the A component, the B component and the C component of the ceramic coating need to be stored separately during storage and transportation, and some catalysts cannot reach a certain purity, and some even have a large water content, the siloxane in the B component is prone to hydrolysis during storage and transportation, thereby affecting the overall performance of the ceramic coating and having a great impact on the later spraying and construction of the ceramic coating, such as causing shrinkage and other phenomena. Therefore, the present application eliminates the acidic catalyst from the coating formulation, which not only reduces the cost, but also avoids the problems of affecting the quality of the ceramic coating product and causing defects in the spraying and construction due to insufficient catalyst purity.

[0093] The various embodiments are described in the specification, each having its own focal point and emphasizing different aspects of the application. The same or similar parts among the various embodiments can be mutually referred to. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part.

[0094] The long-term high-temperature-resistant non-stick ceramic coating, the preparation method and the non-stick coating made of the long-term high-temperature-resistant non-stick ceramic coating are described in detail above. The principles and implementation manners of the application are described by using specific examples in this paper. The above description of the embodiments is only used to help understand the method and the core idea of the application. It should be pointed out that for ordinary skilled persons in the art, without departing from the principles of the application, the application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims

1. A method for preparing a long-term high-temperature resistant non-stick ceramic coating, characterized by The method comprises the following steps: S1, stir and react hexamethyldisilazane and silica sol at 20-60℃ for 4-16h to obtain modified silica sol containing methyl groups on the surface, add appropriate amount of filler, pigment and dispersant, and disperse at high speed to prepare A component of ceramic coating; the amount of hexamethyldisilazane added is 4-10% based on 100% of the weight of silica sol; The silica sol is alkaline silica sol, the solid mass fraction of the silica sol is 20%-40%, and the particle size is 6-60nm; The formula of the A component of the ceramic coating is: Modified silica sol 40-99 parts, filler 0-30 parts, pigment 0-30 parts, and dispersant 0-5 parts, The total weight of all raw material components is 100 parts; the amount of filler, pigment and dispersant is not 0; S2, mix siloxane, silicone oil and silane coupling agent to prepare B component of ceramic coating; The weight ratio of raw materials in B component is: siloxane 45-98 parts, silicone oil 0-10 parts, and silane coupling agent 0-5 parts; the total weight of all raw material components is 100 parts, and the amount of silicone oil and silane coupling agent is not 0; S3, add B component to A component, roll and age, and stand by; A component and B component are mixed at a weight ratio of 1:1-3:1; S4, mix appropriate amount of leveling agent, solvent and other additives to prepare C component of ceramic coating; S5, add C component to the aged mixture obtained in S3 before use, mix, and obtain ceramic coating; the amount of C component added is 2%-10% based on 100% of the total weight of the aged mixture obtained in S3.

2. The preparation method according to claim 1, characterized in that: The filler is selected from one or more of barium sulfate, alumina, mica powder, white carbon black, talc powder, ceramic powder, whisker silicon, silicon powder, and quartz powder; The pigment is selected from one or more of titanium dioxide, iron oxide black, carbon black, copper-chromium black, manganese-iron black, iron oxide yellow, phthalocyanine blue, phthalocyanine green, titanium yellow, bismuth yellow, iron oxide red, cobalt blue, cobalt green, iron oxide green, pearl pigment, and metal pigment.

3. The preparation method according to claim 1, characterized in that: The siloxane is one or more of methyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, dimethyldiethoxysilane, dimethyldimethoxysilane, methylphenyldimethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, vinyltriethoxysilane, phenyltrimethoxysilane, and phenyltriethoxysilane; The silicone oil is selected from one or more of dimethyl silicone oil, hydroxyl silicone oil, hydrogen-containing silicone oil, amino silicone oil, and mercapto silicone oil.

4. The method of claim 1, wherein: The rolling aging in S3 is performed at a rolling speed of 1000rpm-1600rpm, an aging temperature of 10-30℃, and an aging time of 4-12h.

5. The preparation method according to claim 1, characterized in that: The weight ratio of raw materials in C component is: leveling agent 10-40 parts, solvent 30-80 parts, and other additives 0-10 parts; the total weight of all raw material components is 100 parts, and the amount of other additives is not 0.

6. The non-stick ceramic coating prepared by the method of claim 1.

7. The use of the long-term high-temperature resistant non-stick ceramic coating of claim 6 in the preparation of non-stick kitchen utensils, including frying pans, woks, soup pots, rice cookers, ovens, and smoke machines.

8. Use according to claim 7, characterized in that: The ceramic coating of claim 6 is sprayed onto the kitchen utensils by pneumatic spraying, the thickness of the coating is controlled to be 30-40 microns, and then the long-term high-temperature resistant non-stick ceramic coating is obtained by baking at 280℃±50℃ for 15-30 minutes.

Images