Coating composition, coating and cooking appliance

Abstract

The present application relates to the technical field of coating, in particular to a coating composition, a coating and a cooking utensil. The coating composition comprises polysilazane, a first polysiloxane and a second polysiloxane; wherein the substituents on the silicon atoms in the first polysiloxane are each independently aryl, alkyl, hydroxyl, and at least one substituent is aryl; the substituents on the silicon atoms in the second polysiloxane are each independently alkyl, hydroxyl, and at least one substituent is hydroxyl. The coating prepared based on the coating composition can have good interfacial bonding strength with the enamel substrate, and the coating has excellent easy-to-clean performance, high hardness, high temperature resistance and salt mist corrosion resistance, effectively solving the problem of difficult cleaning of the enamel surface due to easy attachment of oil stains, food residues and the like.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and more particularly to coating compositions, coatings, and cooking utensils. Background Technology

[0002] Existing household appliances face various environmental conditions during use, such as high-temperature variations and oil stains, thus imposing stringent requirements on coating performance. For example, oven liner materials are typically coated with enamel, which offers advantages such as high temperature resistance, corrosion resistance, high wear resistance, and high hardness. However, the high surface energy and small water contact angle (around 70°) of traditional enamel materials make them prone to accumulating oil stains and food residue, affecting cleaning performance and significantly impacting the user experience. Therefore, developing an easy-to-clean enamel material or imbuing enamel surfaces with an easy-to-clean effect (i.e., applying a high-temperature resistant, high-hardness, easy-to-clean coating to the enamel surface) is of significant practical importance. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, the present invention provides a coating composition, a coating layer, and a cooking utensil. The coating obtained from this coating composition exhibits high temperature resistance, abrasion resistance, high hardness, oxidation resistance, and easy cleaning properties.

[0004] Therefore, a first aspect of the present invention provides a coating composition comprising a polysilazane, a first polysiloxane, and a second polysiloxane;

[0005] In the first polysiloxane, the substituents on the silicon atoms are each independently aryl, alkyl, or hydroxyl, and at least one substituent is aryl;

[0006] In the second polysiloxane, the substituents on the silicon atoms are each independently alkyl or hydroxyl, and at least one substituent is hydroxyl.

[0007] This coating composition includes a polysilazane, which can chemically react with the hydroxyl groups on the surface of enamel substrates to form silicon-oxidative chemical bonds, thereby constructing a high-strength interface on the substrate surface and achieving strong adhesion. It also further improves the heat resistance and abrasion resistance of the composition. Furthermore, the coating composition includes a first polysiloxane and a second polysiloxane. In the first polysiloxane, the substituents on the silicon atoms are independently aryl, alkyl, or hydroxyl, with at least one substituent being aryl, thus giving the polysiloxane good film-forming properties and heat resistance. In the second polysiloxane, the substituents on the silicon atoms are independently alkyl or hydroxyl, with at least one substituent being hydroxyl, thus giving the polysiloxane good anti-stick properties. Applying this coating composition to coatings can significantly improve the coating's high-temperature resistance, abrasion resistance, oxidation resistance, and ease of cleaning.

[0008] According to an embodiment of the present invention, the aryl group in the first polysiloxane is C6-C. 12 The aryl group, wherein the alkyl group is C1-C 10 Alkyl groups.

[0009] According to an embodiment of the present invention, the first polysiloxane has the structure shown in Formula I;

[0010]

[0011] Among them, R1 and R2 are independent.

[0012] n is 2-5.

[0013] According to an embodiment of the present invention, one of R1 and R2 is The other one is

[0014] According to an embodiment of the present invention, the alkyl group in the second polysiloxane is C1-C6. 10 Alkyl groups.

[0015] According to an embodiment of the present invention, the second polysiloxane has the structure shown in Formula II;

[0016]

[0017] Where m is 2-4.

[0018] According to an embodiment of the present invention, the mass ratio of the polysilazane, the first polysiloxane, and the second polysiloxane is (6-10):(90-110):(1.5-2.0).

[0019] According to embodiments of the present invention, the coating composition further includes a lubricant and a leveling agent.

[0020] According to an embodiment of the present invention, the mass ratio of the polysilazane, the first polysiloxane, the second polysiloxane, the lubricant and the leveling agent is (6-10):(90-110):(1.5-2.0):(1.1-1.3):(0.12-0.15).

[0021] A second aspect of the present invention provides a coating formed from the coating composition described in the first aspect.

[0022] Therefore, this coating possesses properties such as high temperature resistance, wear resistance, high hardness, oxidation resistance, and easy cleaning. Specifically, the coating is resistant to high temperatures (350℃), has a water contact angle greater than 100°, does not stick to oil stains, and has good easy-to-clean properties. When applied to the surface of an enamel substrate, it exhibits adhesion grade 0, a hardness of 6H-7H, and excellent resistance to salt spray corrosion.

[0023] According to an embodiment of the present invention, the thickness of the coating is 4-10 μm.

[0024] A third aspect of the present invention provides a cooking appliance comprising a substrate and the coating described in the second aspect, wherein at least a portion of the surface of the substrate is provided with a base coating and the coating is disposed on the surface of the base coating.

[0025] The cooking appliance includes the aforementioned coating, and thus possesses the advantages of the aforementioned coating, which will not be elaborated here.

[0026] According to an embodiment of the present invention, the surface of the base coating has hydroxyl groups.

[0027] According to an embodiment of the present invention, the material forming the base coating is at least one of glass, enamel, or metal.

[0028] According to embodiments of the present invention, the cooking appliances include electric ovens, microwave ovens, steam ovens, electric kettles, electric blankets, electric fans, electric heaters, bathroom heaters, electric ceramic stoves, or disinfection cabinets.

[0029] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0031] Figure 1 One of the structural schematic diagrams of the cooking utensil provided by the present invention is shown;

[0032] Figure 2 This shows a second schematic diagram of the structure of the cooking utensil provided by the present invention;

[0033] Figure 3 The third schematic diagram of the structure of the cooking utensil provided by the present invention is shown;

[0034] Figure 4 A top view showing a structural schematic diagram of the cooking utensil provided by the present invention is displayed;

[0035] Figure 5 yes Figure 4 A sectional view of section AA in the middle.

[0036] Reference numerals: cooking appliance 100, main unit 110, door 120, cooking cavity 130, cavity top plate 131, cavity left side wall plate 132, cavity right side wall plate 133, cavity bottom plate 134, cavity front plate 135, cavity rear plate 136, bottom coating 137, coating 138. Detailed Implementation

[0037] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0038] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0039] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0040] To facilitate understanding of the invention, certain technical and scientific terms are specifically defined below. Unless otherwise expressly defined elsewhere in this document, all other technical and scientific terms used herein have the meanings commonly understood by one of ordinary skill in the art to which this invention pertains.

[0041] In this document, the terms “comprising” or “including” are open-ended expressions, meaning that they include the contents specified in this invention, but do not exclude other aspects.

[0042] The term "C1-C" 10 "Alkyl" should be understood to mean a straight-chain or branched saturated monovalent hydrocarbon group having 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 carbon atoms. The alkyl group is, for example, methyl, ethyl, propyl, butyl, pentyl, hexyl, isopropyl, isobutyl, sec-butyl, tert-butyl, isopentyl, 2-methylbutyl, 1-methylbutyl, 1-ethylpropyl, 1,2-dimethylpropyl, neopentyl, 1,1-dimethylpropyl, 4-methylpentyl, 3-methylpentyl, 2-methylpentyl, 1-methylpentyl, 2-ethylbutyl, 1-ethylbutyl, 3,3-dimethylbutyl, 2,2-dimethylbutyl, 1,1-dimethylbutyl, 2,3-dimethylbutyl, 1,3-dimethylbutyl, or 1,2-dimethylbutyl, or their isomers.

[0043] The term "C6-C" 12"Aryl" should be understood as a monocyclic, bicyclic, or tricyclic hydrocarbon ring with 6-12 carbon atoms that is monovalent and aromatic or partially aromatic, particularly a ring with 6 carbon atoms ("C6 aryl"), such as phenyl; or biphenyl, or a ring with 9 carbon atoms ("C9 aryl"), such as indenyl or indenyl, or a ring with 10 carbon atoms ("C9 aryl"). 10 Aryl), such as tetrahydronaphthyl, dihydronaphthyl or naphthyl.

[0044] According to embodiments of the present invention, a first aspect of the present invention provides a coating composition comprising a polysilazane, a first polysiloxane, and a second polysiloxane;

[0045] In the first polysiloxane, the substituents on the silicon atoms are each independently aryl, alkyl, or hydroxyl, and at least one substituent is aryl;

[0046] In the second polysiloxane, the substituents on the silicon atoms are each independently alkyl or hydroxyl, and at least one substituent is hydroxyl.

[0047] Enamelled substrates have high surface energy and a small water contact angle, making them prone to adhesion of oil, food residue, etc., and lacking easy cleaning properties. Furthermore, the smooth surface of enamel substrates makes coating application difficult. To address these issues, this invention provides a coating composition comprising polysilazane, a first polysiloxane, and a second polysiloxane. Because the surface of enamel substrates contains hydroxyl groups, the polysilazane can chemically react with them to form silicon-oxygen bonds, thereby constructing a high-strength interface on the substrate surface and achieving grade 0 adhesion. The first polysiloxane contains aryl groups, thus exhibiting good film-forming properties and heat resistance. The second polysiloxane has a Si-O-Si main chain structure, exhibiting non-polar characteristics and therefore low surface energy, reducing adhesion to other substances. Simultaneously, the presence of hydroxyl groups in the second polysiloxane structure allows for a certain degree of condensation at high temperatures, further enhancing the material's non-stick properties. Therefore, when this coating composition is applied to the surface of enamel substrates, it can achieve coating properties such as high-temperature resistance, wear resistance, oxidation resistance, and easy cleaning.

[0048] According to a specific embodiment of the present invention, the aryl group in the first polysiloxane is C6-C. 12 The aryl group, wherein the alkyl group is C1-C 10 Alkyl groups.

[0049] According to a specific embodiment of the present invention, the first polysiloxane has the structure shown in Formula I;

[0050]

[0051] Among them, R1 and R2 are independent.

[0052] n is 2-5.

[0053] According to a specific embodiment of the present invention, one of R1 and R2 is The other one is

[0054] Specifically, n can be 2, 2.5, 3, 3.5, 3.8, 4, 5, etc., with 3.8 being the preferred value.

[0055] According to a specific embodiment of the present invention, the first polysiloxane may be SJ-482, IR-1801, SJ-46, etc.

[0056] According to a specific embodiment of the present invention, the alkyl group in the second polysiloxane is C1-C6. 10 Alkyl groups.

[0057] According to a specific embodiment of the present invention, the second polysiloxane has the structure shown in Formula II;

[0058]

[0059] Where m is 2-4.

[0060] According to specific embodiments of the present invention, m can be 2, 2.4, 2.5, 3, 3.5, 4, etc., and is preferably 2.4.

[0061] According to a specific embodiment of the present invention, the second polysiloxane may be SN-2932.

[0062] According to a specific embodiment of the present invention, the mass ratio of the polysilazane, the first polysiloxane, and the second polysiloxane is (6-10):(90-110):(1.5-2.0). This further improves the film-forming properties, wear resistance, oxidation resistance, and ease of cleaning of the resulting coating.

[0063] According to specific embodiments of the present invention, the coating composition further includes a lubricant and a leveling agent. The lubricant improves the smoothness and flowability of the coating surface by reducing interfacial tension, thereby enhancing the coating's adaptability. The leveling agent improves the flowability and uniformity of the coating, thus improving the coating's smoothness. Those skilled in the art can add these components according to the actual preparation conditions, including but not limited to lubricants and leveling agents, and other additives may also be added.

[0064] According to specific embodiments of the present invention, the type of lubricant is not particularly limited, and as some specific examples, it includes, but is not limited to, at least one of polyethylene glycol and polypropylene glycol.

[0065] According to specific embodiments of the present invention, the type of leveling agent is not particularly limited, and as some specific examples, it includes, but is not limited to, at least one of polyacrylate (e.g., BYK-354), polydimethylsiloxane, and polymethylalkylsiloxane.

[0066] According to a specific embodiment of the present invention, the mass ratio of the polysilazane, the first polysiloxane, the second polysiloxane, the lubricant, and the leveling agent is (6-10):(90-110):(1.5-2.0):(1.1-1.3):(0.12-0.15). This further improves the film-forming properties, uniformity, and smoothness of the resulting coating.

[0067] According to an embodiment of the present invention, a second aspect of the present invention provides a coating formed from the coating composition described in the first aspect.

[0068] According to embodiments of the present invention, the preparation method of the coating is not particularly limited, and the coating can be obtained by mixing and curing the coating composition described in the first aspect.

[0069] Specifically, the temperature and time of the curing process are not limited, as long as the curing effect is achieved. As some specific examples, the curing temperature is 15-200℃, such as 15℃, 30℃, 45℃, 60℃, 75℃, 90℃, 105℃, 120℃, 135℃, 150℃, 175℃, 200℃, etc.; the curing time can be adjusted according to the curing temperature, such as 15min, 30min, 1h, 3h, 5h, 8h, 12h, 16h, 20h, 24h, etc.

[0070] According to specific embodiments of the present invention, the thickness of the coating is not particularly limited and can be selected by those skilled in the art according to the preparation situation. As some specific examples, the thickness of the coating is 4-10 μm, such as 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, etc.

[0071] According to an embodiment of the present invention, a third aspect of the present invention provides a cooking appliance, the cooking appliance comprising a substrate and the coating described in the second aspect, wherein at least a portion of the surface of the substrate is provided with a base coating, and the coating is disposed on the surface of the base coating.

[0072] According to a specific embodiment of the present invention, the surface of the base coating layer has hydroxyl groups. This allows a high-strength interface to be formed between the base coating and the base coating, achieving Grade 0 adhesion while maintaining easy cleaning properties.

[0073] According to specific embodiments of the present invention, the material forming the base coating is not particularly limited, but preferably has hydroxyl groups in its structure, including but not limited to materials such as glass, enamel, and metal.

[0074] According to specific embodiments of the present invention, the material of the substrate is not particularly limited, including but not limited to low-carbon steel.

[0075] According to specific embodiments of the present invention, the cooking appliances include, but are not limited to, electric ovens, microwave ovens, steam ovens, electric kettles, electric blankets, electric fans, electric heaters, bathroom heaters, electric ceramic stoves, or disinfection cabinets.

[0076] According to a specific embodiment of the present invention, the cooking utensil may have Figures 1-5 The structure. For example... Figures 1-4 As shown, the cooking appliance 100 includes a main unit 110 and a door 120, with the main unit 110 having a cooking cavity 130. The door 120 is closable and can be installed on the main unit 110 to selectively close the cooking cavity 130. The main unit 110 can be used to cook food through temperature and time control, and the cooking cavity 130 can serve as a container, cooperating with the door 120 to provide a closed environment for the food.

[0077] like Figure 3 As shown, the cooking cavity 130 includes a cavity top plate 131, a cavity left side wall plate 132, a cavity right side wall plate 133, a cavity bottom plate 134, a cavity front plate 135, and a cavity rear plate 136.

[0078] The inner surface of the cavity can be coated with a base layer as needed. For example... Figures 4-5 As shown, the inner surface of the cavity front plate 135 is provided with a base coating 137, the material of which can be enamel, glass, etc. The aforementioned coating 138 is provided on the surface of the base coating 137, thereby effectively solving the problem of enamel surfaces being difficult to clean due to easy adhesion of oil stains, food residues, etc.

[0079] Those skilled in the art will understand that, in addition to the substrate, base coating and coating mentioned above, cooking appliances also include essential structures or components. For example, an electric oven, in addition to the substrate and coating mentioned above, also includes essential structures or components such as the shell, heating space, base, and plug.

[0080] The present invention will be explained below with reference to embodiments. Those skilled in the art will understand that the following embodiments are for illustrative purposes only and should not be considered as limiting the scope of the invention. Where specific techniques or conditions are not specified in the embodiments, they are performed according to the techniques or conditions described in the literature in the field or according to the product instructions. Reagents or instruments whose manufacturers are not specified are all conventional products that can be obtained commercially.

[0081] Example 1

[0082] The composition of the coating composition in this embodiment is as follows:

[0083] 100 parts by weight of SJ-482 high-temperature resistant nano-organic silicone resin, 1.75 parts by weight of SN-2932 high-temperature resistant organic silicone non-stick additive, 8.145 parts by weight of polysilazane, 1.265 parts by weight of polyethylene glycol, and 0.145 parts by weight of BYK-354 leveling agent.

[0084] The above coating composition is mixed and applied to the enamel surface, and cured at 200°C for 15-30 minutes to obtain the coating.

[0085] Example 2

[0086] The composition of the coating composition in this embodiment is as follows:

[0087] 100 parts by weight of SJ-482 high-temperature resistant nano-organic silicone resin, 1.75 parts by weight of SN-2932 high-temperature resistant organic silicone non-stick additive, 10 parts by weight of polysilazane, 1.265 parts by weight of polyethylene glycol, and 0.145 parts by weight of BYK-354 leveling agent.

[0088] The above coating composition is mixed and applied to the enamel surface, and cured at 200°C for 15-30 minutes to obtain the coating.

[0089] Example 3

[0090] The composition of the coating composition in this embodiment is as follows:

[0091] 100 parts by weight of SJ-482 high-temperature resistant nano-organic silicone resin, 1.75 parts by weight of SN-2932 high-temperature resistant organic silicone non-stick additive, 6 parts by weight of polysilazane, 1.265 parts by weight of polyethylene glycol, and 0.145 parts by weight of BYK-354 leveling agent.

[0092] The above coating composition is mixed and applied to the enamel surface, and cured at 200°C for 15-30 minutes to obtain the coating.

[0093] Example 4

[0094] The composition of the coating composition in this embodiment is as follows:

[0095] 100 parts by weight of SJ-482 high-temperature resistant nano-organic silicone resin, 2 parts by weight of SN-2932 high-temperature resistant organic silicone non-stick additive, 8.2 parts by weight of polysilazane, 1.265 parts by weight of polyethylene glycol, and 0.145 parts by weight of BYK-354 leveling agent.

[0096] The above coating composition is mixed and applied to the enamel surface, and cured at 200°C for 15-30 minutes to obtain the coating.

[0097] Example 5

[0098] The composition of the coating composition in this embodiment is as follows:

[0099] 100 parts by weight of SJ-482 high-temperature resistant nano-organic silicone resin, 1.5 parts by weight of SN-2932 high-temperature resistant organic silicone non-stick additive, 8.2 parts by weight of polysilazane, 1.265 parts by weight of polyethylene glycol, and 0.145 parts by weight of BYK-354 leveling agent.

[0100] The above coating composition is mixed and applied to the enamel surface, and cured at 200°C for 15-30 minutes to obtain the coating.

[0101] Example 6

[0102] The composition of the coating composition in this embodiment is as follows:

[0103] 100 parts by weight of SJ-482 high-temperature resistant nano-organic silicone resin, 1.5 parts by weight of SN-2932 high-temperature resistant organic silicone non-stick additive, 6 parts by weight of polysilazane, 1.265 parts by weight of polyethylene glycol, and 0.145 parts by weight of BYK-354 leveling agent.

[0104] The above coating composition is mixed and applied to the enamel surface, and cured at 200°C for 15-30 minutes to obtain the coating.

[0105] Comparative Example 1

[0106] The difference between it and Example 1 is that no coating is applied to the enamel surface.

[0107] Comparative Example 2

[0108] The composition of the coating composition in this comparative example is as follows:

[0109] 100 parts by weight of SJ-482 high-temperature resistant nano-organic silicone resin, 8.145 parts by weight of polysilazane, 1.265 parts by weight of polyethylene glycol, and 0.145 parts by weight of BYK-354 leveling agent.

[0110] The above coating composition is mixed and applied to the enamel surface, and cured at 200°C for 15-30 minutes to obtain the coating.

[0111] Comparative Example 3

[0112] The composition of the coating composition in this comparative example is as follows:

[0113] 100 parts by weight of SJ-482 high-temperature resistant nano-organic silicone resin, 1.75 parts by weight of SN-2932 high-temperature resistant organic silicone non-stick additive, 1.265 parts by weight of polyethylene glycol, and 0.145 parts by weight of BYK-354 leveling agent.

[0114] The above coating composition is mixed and applied to the enamel surface, and cured at 200°C for 15-30 minutes to obtain the coating.

[0115] Test case

[0116] The coatings or substrates (Comparative Example 1) in the above embodiments and comparative examples were subjected to the following property tests:

[0117] (1) High-temperature cleanliness:

[0118] A. Place the coating sample to be tested in a high-temperature oven for testing. After the temperature is raised to 220℃ and kept constant for 2 hours, take out the sample and cool it to room temperature. Draw lines on the coating sample with a Zebra oil-based pen and leave it at room temperature for 1 minute. Then, wipe the sample surface with a BASF scouring pad using a force of 10N and count the number of times that more than 80% of the oil-based pen marks can be removed.

[0119] B. Apply sauce to 50% of the area of ​​the coating sample to be tested, place it in a high-temperature oven for testing, raise the temperature to 220°C and keep it at that temperature for 2 hours, then take out the sample and cool it to room temperature. Use a BASF scouring pad to wipe the sample surface with a force of 10N and count the number of times that more than 80% of the sauce oil stains can be removed.

[0120] The results are represented by "LVN", where "N" represents a number. The larger the N, the better the cleaning performance. See Table 1 for details. The level of ease of cleaning is positively correlated with the ease of cleaning.

[0121] (2) High temperature resistance: After the test panel is placed in an environment of 350℃ for 16 hours, the adhesion level is tested by the cross-cut adhesion test. The adhesion level is divided into 0 to 5 levels from high to low, with level 0 representing the highest adhesion and the most difficult coating to peel off;

[0122] (3) Hardness test: The pencil hardness of the paint film was tested using a hardness tester in accordance with the national standard GB / T 6739—2006.

[0123] (4) Salt spray corrosion resistance: According to GB / T1771, conduct a 240-hour intermediate salt spray test and observe whether there are phenomena such as blistering, rusting, and decreased adhesion.

[0124] The test results are shown in Table 2.

[0125] Table 1

[0126] Number of times to wipe back and forth Easy to clean 1-5 LV3 6-10 LV2 11-30 LV1 Cannot be wiped off LV0

[0127] Table 2

[0128]

[0129] The results show that the coating prepared by the coating composition provided by the present invention can achieve good adhesion on the surface of enamel substrate, while taking into account high temperature resistance, wear resistance, high hardness, oxidation resistance and easy cleaning performance.

[0130] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0131] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A coating composition, characterized in that, The coating composition includes polysilazane, a first polysiloxane, and a second polysiloxane; In the first polysiloxane, the substituents on the silicon atoms are each independently aryl, alkyl, or hydroxyl, and at least one substituent is aryl; In the second polysiloxane, the substituents on the silicon atoms are each independently alkyl or hydroxyl, and at least one substituent is hydroxyl.

2. The coating composition according to claim 1, characterized in that, The aryl group in the first polysiloxane is C6-C. 12 The aryl group, wherein the alkyl group is C1-C 10 Alkyl groups.

3. The coating composition according to claim 1, characterized in that, The first polysiloxane has the structure shown in Formula I; Among them, R1 and R2 are independent. n is 2-5.

4. The coating composition according to claim 3, characterized in that, One of R1 and R2 is The other one is 5. The coating composition according to claim 1, characterized in that, The alkyl group in the second polysiloxane is C1-C. 10 Alkyl groups.

6. The coating composition according to claim 1, characterized in that, The second polysiloxane has the structure shown in Formula II; Where m is 2-4.

7. The coating composition according to claim 1, characterized in that, The mass ratio of the polysilazane, the first polysiloxane, and the second polysiloxane is (6-10):(90-110):(1.5-2.0).

8. The coating composition according to claim 1, characterized in that, The coating composition also includes lubricants and leveling agents.

9. The coating composition according to claim 8, characterized in that, The mass ratio of the polysilazane, the first polysiloxane, the second polysiloxane, the lubricant, and the leveling agent is (6-10):(90-110):(1.5-2.0):(1.1-1.3):(0.12-0.15).

10. A coating, characterized in that, The coating is formed from the coating composition according to any one of claims 1-9.

11. The coating according to claim 10, characterized in that, The coating thickness is 4-10 μm.

12. A cooking utensil, characterized in that, The cooking appliance includes a substrate and a coating as described in claim 10 or 11, wherein at least a portion of the surface of the substrate is provided with a base coating, and the coating is disposed on the surface of the base coating.

13. The cooking utensil according to claim 12, characterized in that, The surface of the base coating has hydroxyl groups.

14. The cooking utensil according to claim 12, characterized in that, The material forming the base coating is at least one of glass, enamel, or metal.

15. The cooking utensil according to claim 12, characterized in that, The cooking appliances include electric ovens, microwave ovens, steam ovens, electric kettles, electric blankets, electric fans, electric heaters, bathroom heaters, electric ceramic stoves, or disinfection cabinets.

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