Self-cleaning ceramic coating composition, coating and coating thereof, and kitchen appliance

Abstract

The present invention relates to the field of self-cleaning coatings, and discloses a self-cleaning ceramic coating composition, coating, coating and kitchen appliances. The self-cleaning ceramic coating composition of the present invention comprises an agent A and an agent B, wherein the agent A contains chromium oxide, manganese oxide, nanoparticles with photocatalytic activity and a foaming agent; the agent B contains a silicon source, an organic solvent, an alkyl silicate and a carboxylic acid, and the amount of the agent B is 300-650 parts by weight relative to 100 parts by weight of the agent A. The coating formed by the self-cleaning ceramic coating composition of the present invention can absorb oil smoke and grease generated when baking food, and the oil smoke and grease are automatically decomposed into carbon dioxide and water and discharged into the air under the catalysis of the catalyst in the coating under a high temperature environment, thereby achieving a healthy and environmentally friendly working and living environment, and at the same time, kitchen appliances such as ovens can be free from the cleaning of oil stains and no longer suffer from secondary pollution of detergents.

Description

Technical Field

[0001] The invention relates to the field of self-cleaning coatings, and in particular to a self-cleaning ceramic coating composition, a coating and a coating thereof, and a kitchen appliance. Background Art

[0002] With the development of economy and the improvement of living standards, people have higher and higher requirements for household appliances, especially for kitchen appliances such as ovens and baking ovens that are in frequent contact with various oils, seasonings, acids and alkalis for a long time. In addition to the conventional high-quality baking performance of products, people also require that the products should not have oil smoke leakage during operation, oil stains on the surface of the products, and should be easy to clean.

[0003] At present, ovens or baking ovens have basically adopted three solutions to solve the problem of oil smoke and oil pollution. The first solution is to use ordinary metal materials such as aluminum-plated plates and stainless steel plates directly as the cavity. When the oven or baking oven is working, the oil smoke of the baked food is directly discharged to the outside space through the exhaust hole. The oil pollution remaining on the wall of the oven cavity is manually scrubbed with a detergent after the cavity is cooled. This technical solution has a large workload, serious environmental pollution, and secondary pollution, which is unhealthy and environmentally friendly. The second solution is that on the basis of the first solution, a high-power heating tube device is added to the inner cavity of the oven or toaster oven. When cleaning the oil stains on the cavity wall of the oven or toaster oven, the high-power heating tube device is turned on, the cavity wall is heated up, and the temperature reaches more than 450 degrees, the oil stains are carbonized, and then cooled, and the detergent is used for manual scrubbing. This technical solution is often called "self-cleaning technology", but this method takes a long time to clean and consumes high energy costs. At the same time, the oven or toaster oven itself needs to add a high-function power system and a heat insulation system. The structural cost of the oven or toaster oven itself is relatively high, and although the workload of manual cleaning is reduced, there is still secondary pollution, which is not good for health and environmental protection. The third solution is to spray a layer of low surface energy coating on the inner wall of the oven or toaster oven so that the oil stains cannot adhere to the surface, which makes cleaning much easier, but there is still the problem of exhausting oil smoke polluting the surrounding environment. Summary of the invention

[0004] The purpose of the present invention is to overcome the problems of oil fume diffusion and oil stain adhesion on the cavity wall in the prior art, and to provide a self-cleaning ceramic coating composition, coating and coating thereof, and kitchen appliances coated with the coating. The coating formed by the self-cleaning ceramic coating composition of the present invention can absorb oil fume and grease generated when baking food. Under the catalysis of the catalyst in the coating under high temperature environment, the oil fume and grease are automatically decomposed into carbon dioxide and water and discharged into the air, thereby achieving a healthy and environmentally friendly working and living environment, and at the same time, kitchen appliances such as ovens can be free from the cleaning of oil stains and no longer suffer from secondary pollution of detergents.

[0005] In order to achieve the above-mentioned object, the first aspect of the present invention provides a self-cleaning ceramic coating composition, characterized in that the composition comprises an agent A and an agent B, wherein the agent A contains chromium oxide, manganese oxide, nanoparticles with photocatalytic activity and a foaming agent; the agent B contains a silicon source, an organic solvent, an alkyl silicate and a carboxylic acid, and the amount of the agent B is 300-650 parts by weight relative to 100 parts by weight of the agent A.

[0006] Preferably, the agent A contains 45-55 wt % of chromium-containing oxide, 45-55 wt % of manganese-containing oxide, 0.05-0.3 wt % of nanoparticles having photocatalytic activity and 0.01-1 wt % of a foaming agent.

[0007] Preferably, the A agent also contains 0.01-0.05% by weight of an antibacterial agent.

[0008] Preferably, the agent B contains 25-50 wt % of a silicon source, 40-60 wt % of an organic solvent, 7-9 wt % of an alkyl silicate and 1-5 wt % of a carboxylic acid.

[0009] Preferably, the agent B further contains 1-3 wt % of a pigment.

[0010] Preferably, relative to 100 parts by weight of the agent A, the amount of the agent B is 400-550 parts by weight.

[0011] Preferably, the chromium-containing oxide is chromium trioxide and / or chromium tetroxide.

[0012] Preferably, the manganese-containing oxide is one or more of manganese dioxide, manganese monoxide, dimanganese trioxide and trimanganese tetraoxide.

[0013] Preferably, the nanoparticles having photocatalytic activity are one or more of titanium dioxide nanoparticles, zinc oxide nanoparticles and zirconium dioxide nanoparticles.

[0014] Preferably, the foaming agent is one or more of azodicarbonamide, sodium bicarbonate and barium azodicarboxylate.

[0015] Preferably, the antimicrobial agent is one or more of silver nitrate, silver zeolite and silver-zinc phosphate.

[0016] Preferably, the silicon source is nanoscale sol-gel silica.

[0017] Preferably, the organic solvent is an alcohol organic solvent.

[0018] Preferably, the alkyl silicate is methyl orthosilicate and / or ethyl orthosilicate.

[0019] Preferably, the carboxylic acid is acetic acid.

[0020] In a second aspect, the present invention provides a self-cleaning ceramic coating, which is prepared by mixing agent A and agent B of the self-cleaning ceramic coating composition of the present invention.

[0021] According to a third aspect of the present invention, there is provided a self-cleaning ceramic coating, which is formed by coating the self-cleaning ceramic coating of the present invention and then subjecting the coating to heat treatment.

[0022] According to a fourth aspect of the present invention, there is provided a kitchen appliance, at least a portion of the surface of which is coated with the self-cleaning ceramic coating of the present invention.

[0023] Preferably, the kitchen appliance is one or more of an oven, a microwave oven and a steam oven.

[0024] According to the self-cleaning ceramic coating composition of the present invention, by adding nanoparticles with photocatalytic activity, the surface energy properties of the coating under high temperature conditions can be changed, and the coating is more likely to absorb oil, water, oil gas, etc. under high temperature conditions; by adding chromium-containing oxides, the scratch resistance of the coating can be increased; by adding manganese-containing oxides, the coating can produce a light absorption coloring effect; thus, after the A agent and the B agent are formed into a coating, the synergistic effect of the various components in the A agent can effectively absorb the oil smoke and can effectively decompose it, thereby achieving a healthy and environmentally friendly working and living environment, and at the same time, kitchen appliances such as ovens can be free from the cleaning of oil stains and no longer suffer from secondary pollution of detergents.

[0025] According to the self-cleaning ceramic coating composition of the present invention, by containing a foaming agent in agent A, the coating can form a porous loose structure to increase the contact area, thereby further improving the coating's ability to adsorb oil smoke, thereby improving the coating's self-cleaning effect.

[0026] According to the self-cleaning ceramic coating composition of the present invention, by further including an antibacterial agent in agent A, the coating can have the effects of sterilization and preventing mold and odor. DETAILED DESCRIPTION

[0027] The endpoints and any values ​​of the ranges disclosed in this article 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 each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0028] According to a first aspect of the present invention, a self-cleaning ceramic coating composition is provided, which comprises an agent A and an agent B, wherein the agent A contains chromium oxide, manganese oxide, nanoparticles with photocatalytic activity and a foaming agent; the agent B contains a silicon source, an organic solvent, an alkyl silicate and a carboxylic acid, and the amount of the agent B is 300-650 parts by weight relative to 100 parts by weight of the agent A.

[0029] According to the present invention, in order to further improve the oil fume adsorption capacity and oil fume decomposition capacity of the coating formed by the self-cleaning ceramic coating composition, preferably, the A agent contains 40-60 weight % of chromium-containing oxide, 40-60 weight % of manganese-containing oxide, 0.01-0.5 weight % of nanoparticles with photocatalytic activity and 0.01-1 weight % of foaming agent; more preferably, the A agent contains 45-55 weight % of chromium-containing oxide, 45-55 weight % of manganese-containing oxide, 0.05-0.3 weight % of nanoparticles with photocatalytic activity and 0.01-0.05 weight % of foaming agent.

[0030] In the present invention, by adding nanoparticles with photocatalytic activity, the surface energy properties of the coating under high temperature conditions can be changed, and the coating is more likely to adsorb oil, water, oil gas, etc. under high temperature conditions; by adding chromium-containing oxides, the scratch resistance of the coating can be increased; by adding manganese-containing oxides, the coating can produce a light absorption coloring effect; thus, after the A and B agents are formed into a coating, the synergistic effect of the various components in the A agent can effectively adsorb the fumes and effectively decompose them, thereby achieving a healthy and environmentally friendly working and living environment, and at the same time, kitchen appliances such as ovens can be free from the cleaning of oil stains and no longer suffer from secondary pollution of detergents.

[0031] Preferably, the chromium-containing oxide is chromium trioxide and / or chromium tetroxide; more preferably, the chromium-containing oxide is chromium trioxide.

[0032] Preferably, the manganese-containing oxide is one or more of manganese dioxide, manganese monoxide, dimanganese trioxide and trimanganese tetraoxide. More preferably, the manganese-containing oxide is manganese dioxide and / or manganese monoxide.

[0033] In the present invention, the nanoparticles with photocatalytic activity may be various nanoparticles with photocatalytic activity commonly used in the art, and such nanoparticles may include, for example, one or more of titanium dioxide nanoparticles, zinc oxide nanoparticles, and zirconium dioxide nanoparticles. Preferably, the nanoparticles with photocatalytic activity are titanium dioxide nanoparticles.

[0034] In the present invention, the foaming agent can be any substance commonly used for foaming in the art, for example, one or more of azodicarbonamide, sodium bicarbonate and barium azodicarboxylate. Preferably, the foaming agent is azodicarbonamide.

[0035] According to the present invention, in order to make the coating have the effect of sterilization and preventing mold and odor, preferably, the agent A also contains 0.01-0.05 wt % of an antibacterial agent; more preferably, the agent A also contains 0.02-0.05 wt % of an antibacterial agent.

[0036] The antibacterial agent may be any of various antibacterial substances commonly used in the art, for example, one or more of silver nitrate, silver zeolite and silver-zinc phosphate.

[0037] According to the present invention, preferably, the agent B contains 20-55 wt % of a silicon source, 35-55 wt % of an organic solvent, 5-11 wt % of an alkyl silicate and 1-8 wt % of a carboxylic acid; more preferably, the agent B contains 25-50 wt % of a silicon source, 40-60 wt % of an organic solvent, 7-9 wt % of an alkyl silicate and 1-5 wt % of a carboxylic acid.

[0038] According to the present invention, preferably, the silicon source is inorganic silicone resin and / or nano titanium dioxide; more preferably, the silicon source is nano-scale sol-gel silica.

[0039] According to the present invention, preferably, the organic solvent is an alcohol organic solvent. Examples of such organic solvents include one or more of ethanol, isopropanol and butanol.

[0040] According to the present invention, preferably, the alkyl silicate is one or more of methyl orthosilicate and ethyl orthosilicate; more preferably, the alkyl silicate is ethyl orthosilicate.

[0041] According to the present invention, preferably, the carboxylic acid is one or more of acetic acid, formic acid, trimethylhexanoic acid and fatty acid; more preferably, the carboxylic acid is acetic acid.

[0042] According to the present invention, from the aspect of appearance, preferably, the agent B further contains 0.5-5 wt% of pigment; more preferably, the agent B further contains 1-3 wt% of pigment. The above-mentioned pigment can be, for example, one or more of carbon black and iron black, preferably carbon black.

[0043] In the present invention, the agent B is the main agent, and the agent A is the filler. The dosage of the agent B can vary within a wide range. Preferably, relative to 100 parts by weight of the agent A, the dosage of the agent B is 400-550 parts by weight.

[0044] According to a second aspect of the present invention, the present invention provides a self-cleaning ceramic coating, which is prepared by mixing agent A and agent B of the self-cleaning ceramic coating composition of the present invention.

[0045] According to the present invention, the self-cleaning ceramic coating is obtained by mixing the agent A and the agent B evenly, respectively. Alternatively, the agent B may be mixed first, and then the components of the agent A alone or a mixture of two or more components of the agent A are added to the mixed agent B to obtain the self-cleaning ceramic coating.

[0046] The order of mixing the agent A and the agent B is not particularly limited and may be any order.

[0047] In addition, when mixing the agent B, it is preferred that the silicon source and the organic solvent are first mixed, and then the alkyl silicate and other components are added and mixed.

[0048] The mixing method is not particularly limited, and the mixing may be performed by known means such as stirring and ultrasound.

[0049] According to a third aspect of the present invention, there is provided a self-cleaning ceramic coating, which is formed by coating the self-cleaning ceramic coating of the present invention and then subjecting the coating to heat treatment.

[0050] The coating method is not particularly limited and can be carried out by methods commonly used in the art, for example, spray coating, flow coating, roller coating, spin coating, blade coating and other well-known coating methods.

[0051] In addition, the heat treatment conditions include: the heat treatment temperature is 180-280° C., and the heat treatment time is 10-20 minutes.

[0052] According to a fourth aspect of the present invention, there is provided a kitchen appliance, at least a portion of the surface of which is coated with the self-cleaning ceramic coating of the present invention.

[0053] According to the present invention, the kitchen appliance may be one or more of an oven, a microwave oven and a steam oven.

[0054] The present invention will be described in detail below through examples.

[0055] In the following examples and comparative examples, unless otherwise specified, "%" means "% by weight".

[0056] In the following examples and comparative examples,

[0057] Inorganic nanoscale sol-gel silica: ND-SIR purchased from Suzhou Nadi Microelectronics Co., Ltd.;

[0058] Ethyl orthosilicate: industrial grade, purchased from Jiangsu Zhangjiagang Xinya Chemical Co., Ltd.;

[0059] Carbon black paste: purchased from Anhui Heiyu Pigment New Materials Co., Ltd.

[0060] BYK-405: purchased from BYK Chemical Company, Germany.

[0061] Example 1

[0062] The composition of the self-cleaning ceramic coating composition is as follows: the components of the coating are calculated by weight percentage, wherein filler A (including chromium oxide, manganese oxide, nano titanium dioxide particles and additives) accounts for 18%, and base material B (including inorganic nano-scale sol-gel silica, isopropyl alcohol (IPA) solvent, ethyl orthosilicate, acetic acid and carbon black paste) accounts for 82%.

[0063] Filler A was prepared: containing 46% chromium oxide, 53.86% manganese oxide, 0.1% nano titanium dioxide and 0.04% BYK-405 (liquid rheological additive);

[0064] Preparation of base material B: 58% IPA was selected as the solvent, 30% inorganic nano-scale sol-gel silica was dissolved in the solvent, mixed evenly and subjected to ultrasonic vibration for 0.5 h, then 8% ethyl orthosilicate was added to the solution and stirred, 2% acetic acid and 2% carbon black paste were quickly added during the stirring process, the mixture was stirred evenly and then put into a container and sealed, and stored in a specific constant temperature environment at 23±2°C for later use.

[0065] When in use, material A and material B are mixed, and the mixed materials are placed on a roller and rolled for 30 minutes to fully mix material A and material B. The rolled and shaken coating is sprayed on the aluminum plate substrate (as the substrate for the inner wall of the oven or baking furnace) that has been pre-treated and cleaned, and baked at a high temperature of 280±20°C for 15 minutes. Under the action of the foaming agent, the coating forms a layer of high-temperature coating C1 with a loose structure.

[0066] Example 2

[0067] The composition of the self-cleaning ceramic coating composition is as follows: the components of the coating are calculated by weight percentage, wherein filler A (including chromium oxide, manganese oxide, nano titanium dioxide particles and additives) accounts for 20%, and base material B (including inorganic nano-scale sol-gel silica, isopropyl alcohol solvent, ethyl orthosilicate, acetic acid and carbon black paste) accounts for 80%.

[0068] Filler A was prepared: containing 49% chromium oxide, 50.78% manganese oxide, 0.2% nano titanium dioxide and 0.02% BYK-405 (liquid rheological additive);

[0069] Preparation of base material B: 50% IPA is selected as the solvent, 36% inorganic nano-scale sol-gel silica is dissolved in the solvent, mixed evenly and subjected to ultrasonic vibration for 0.5 h, then 8% ethyl orthosilicate is added to the solution and stirred, 3% acetic acid and 3% carbon black paste are quickly added during the stirring process, the mixture is stirred evenly and then put into a container and sealed, and stored in a specific constant temperature environment for later use.

[0070] When in use, material A and material B are mixed, and the mixed materials are placed on a roller and rolled for 30 minutes to fully mix material A and material B. The rolled and shaken coating is then sprayed on the pre-treated and cleaned aluminum plate substrate (as the substrate for the inner wall of the oven or baking furnace), and baked at a high temperature of 280±20°C for 15 minutes. Under the action of the foaming agent, the coating forms a layer of high-temperature coating C2 with a loose structure.

[0071] Example 3

[0072] The composition of the self-cleaning ceramic coating composition is as follows: the components of the coating are calculated by mass percentage, wherein filler A (including chromium oxide, manganese oxide, nano titanium dioxide particles and additives) accounts for 16%, and base material B (including inorganic nano-scale sol-gel silica, ethanol solvent, tetraethyl orthosilicate, acetic acid and carbon black paste) accounts for 84%.

[0073] Filler A was prepared: containing 50% chromium oxide, 49.68% manganese oxide, 0.3% nano titanium dioxide and 0.02% BYK-405 (liquid rheological additive);

[0074] Preparation of base material B: 46% ethanol is selected as the solvent, 40% inorganic nano-scale sol-gel silica is dissolved in the solvent, mixed evenly and subjected to ultrasonic vibration for 0.5 h, then 9% ethyl orthosilicate is added to the solution and stirred, 4% acetic acid and 1% carbon black paste are quickly added during the stirring process, the mixture is stirred evenly and then put into a container and sealed, and stored in a specific constant temperature environment for later use.

[0075] When in use, material A and material B are mixed, and the mixed materials are placed on a roller and rolled for 30 minutes to fully mix material A and material B. The rolled and shaken coating is then sprayed on the pre-treated and cleaned aluminum plate substrate (as the substrate for the inner wall of the oven or baking furnace), and baked at a high temperature of 280±20°C for 15 minutes. Under the action of the foaming agent, the coating forms a layer of high-temperature coating C3 with a loose structure.

[0076] Example 4

[0077] The composition of the self-cleaning ceramic coating composition is as follows: the components of the coating are calculated by mass percentage, wherein filler A (including chromium oxide, manganese oxide, nano titanium dioxide particles and additives) accounts for 17%, and base material B (including inorganic nano-scale sol-gel silica, IPA isopropyl alcohol solvent, ethyl orthosilicate, acetic acid and carbon black paste) accounts for 83%.

[0078] Filler A was prepared: containing 52% chromium oxide, 47.72% manganese oxide, 0.25% nano titanium dioxide and 0.03% BYK-405 (liquid rheological additive);

[0079] Preparation of base material B: 42% IPA is selected as the solvent, 46% inorganic nano-scale sol-gel silica is dissolved in the solvent, mixed evenly and subjected to ultrasonic vibration for 0.5 h, then 8% ethyl orthosilicate is added to the solution and stirred, 2% acetic acid and 2% carbon black paste are quickly added during the stirring process, the mixture is stirred evenly and then put into a container and sealed, and stored in a specific constant temperature environment for later use.

[0080] When in use, material A and material B are mixed, and the mixed materials are placed on a roller and rolled for 30 minutes to fully mix material A and material B. The rolled and shaken coating is then sprayed on the aluminum-plated plate substrate (as the substrate for the inner wall of the oven or baking furnace) that has been pre-treated and cleaned. After being baked at a high temperature of 280±20°C for 15 minutes, the coating forms a layer of high-temperature coating C4 with a loose structure under the action of the foaming agent.

[0081] Example 5

[0082] The composition of the self-cleaning ceramic coating composition is as follows: the components of the coating are calculated by mass percentage, wherein filler A (including chromium oxide, manganese oxide, nano titanium dioxide particles and additives) accounts for 19%, and base material B (including inorganic nano-scale sol-gel silica, ethanol solvent, tetraethyl orthosilicate, acetic acid and carbon black paste) accounts for 81%.

[0083] Filler A was prepared: containing 49.8% chromium oxide, 50% manganese oxide, 0.15% nano titanium dioxide and 0.05% BYK-405 (liquid rheological additive);

[0084] Preparation of base material B: Select 60% ethanol as the solvent, dissolve 30% inorganic nano-scale sol-gel silica into the solvent, mix well and then vibrate ultrasonically for 0.5h, then add 6% ethyl orthosilicate to the solution and stir, quickly add 3% acetic acid and 1% carbon black paste during the stirring process, stir and mix well and then put into a container and seal it, and store it in a specific constant temperature environment for later use.

[0085] When in use, material A and material B are mixed, and the mixed materials are placed on a roller and rolled for 30 minutes to fully mix material A and material B. The rolled and shaken coating is then sprayed on the pre-treated and cleaned aluminum plate substrate (as the substrate for the inner wall of the oven or baking furnace), and baked at a high temperature of 280±20°C for 15 minutes. Under the action of the foaming agent, the coating forms a layer of high-temperature coating C5 with a loose structure.

[0086] Comparative Example 1

[0087] The method of Example 1 is followed, except that filler A does not contain a foaming agent, and a coating layer D1 is formed in the same manner.

[0088] Comparative Example 2

[0089] The method of Example 1 is followed, except that filler A does not contain chromium oxide, and a coating D2 with a loose structure is formed in the same manner.

[0090] Comparative Example 3

[0091] The method of Example 1 is followed, except that the filler A does not contain manganese oxide, and a coating D3 with a loose structure is formed in the same manner.

[0092] Comparative Example 4

[0093] The method of Example 1 is followed, except that filler A does not contain nano titanium dioxide particles, and a coating layer D3 with a loose structure is formed in the same manner.

[0094] Test Example 1

[0095] The coating properties and test methods are shown in Table 1, and the test results are shown in Table 2.

[0096] Table 1

[0097]

[0098] Table 2

[0099]

[0100] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A self-cleaning ceramic coating composition, characterized in that: The composition comprises an agent A and an agent B, The agent A contains chromium oxide, manganese oxide, nanoparticles with photocatalytic activity and a foaming agent; The agent B contains a silicon source, an organic solvent, an alkyl silicate and a carboxylic acid. Relative to 100 parts by weight of the agent A, the amount of the agent B is 300-650 parts by weight, The agent A contains 45-55 wt % of chromium oxide, 45-55 wt % of manganese oxide, 0.05-0.3 wt % of nanoparticles with photocatalytic activity and 0.01-1 wt % of a foaming agent. The silicon source is nano-scale sol-gel silicon dioxide, and the alkyl silicate is methyl orthosilicate and / or ethyl orthosilicate.

2. The composition according to claim 1, wherein The agent A further contains 0.01-0.05% by weight of an antibacterial agent.

3. The composition according to claim 1, wherein The agent B contains 25-50 wt % of a silicon source, 40-60 wt % of an organic solvent, 7-9 wt % of an alkyl silicate and 1-5 wt % of a carboxylic acid.

4. The composition according to claim 3, wherein The agent B also contains 1-3% by weight of a pigment.

5. The composition according to any one of claims 1 to 4, wherein Relative to 100 parts by weight of the agent A, the amount of the agent B is 400-550 parts by weight.

6. The composition according to any one of claims 1 to 4, wherein The chromium-containing oxide is chromium trioxide and / or chromium tetroxide.

7. The composition according to any one of claims 1 to 4, wherein The manganese-containing oxide is one or more of manganese dioxide, manganese monoxide, dimanganese trioxide and trimanganese tetraoxide.

8. The composition according to any one of claims 1 to 4, wherein The nanoparticles with photocatalytic activity are one or more of titanium dioxide nanoparticles, zinc oxide nanoparticles and zirconium dioxide nanoparticles.

9. The composition according to claim 1, wherein The foaming agent is one or more of azodicarbonamide, sodium bicarbonate and barium azodicarboxylate.

10. The composition according to claim 2, wherein The antibacterial agent is one or more of silver nitrate, silver zeolite and silver-zinc phosphate.

11. The composition according to any one of claims 1 to 4, wherein The organic solvent is an alcohol organic solvent.

12. The composition according to any one of claims 1 to 4, wherein The carboxylic acid is acetic acid.

13. A self-cleaning ceramic coating, characterized in that: The self-cleaning ceramic coating is prepared by mixing agent A and agent B of the self-cleaning ceramic coating composition according to any one of claims 1 to 12.

14. A self-cleaning ceramic coating, characterized in that: The self-cleaning ceramic coating is formed by coating the self-cleaning ceramic coating according to claim 13 and then subjecting the coating to heat treatment.

15. A kitchen appliance, characterized in that: At least a portion of the surface of the kitchen appliance is coated with the self-cleaning ceramic coating according to claim 14.

16. The kitchen appliance according to claim 15, wherein: The kitchen appliance is one or more of an oven, a microwave oven and a steam oven.

Images