Organosilicon coating, and preparation method therefor and use thereof

Abstract

The present application provides an organosilicon coating, and a preparation method therefor and the use thereof. The organosilicon coating comprises a primer coating and a topcoat coating. The topcoat coating is prepared from a first composition and a second composition, and the primer coating is prepared from the second composition. The first composition is prepared from a first organosilicon precursor, a second organosilicon precursor, and a first solvent; and the second composition is prepared from SiX4, a second solvent, and a catalyst.

Description

A kind of organosilicon coating and its preparation method and application

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311872249.7, filed on December 29, 2023, entitled “A Silicone Coating, Its Preparation Method and Application,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present invention relates to the field of coating technology, and in particular to an organosilicon coating and a preparation method and application thereof. Background Art

[0004] The kitchen is a vital area in home life and one where grease is most likely to accumulate. Kitchen appliances such as ovens, stoves, and range hoods are constantly exposed to high temperatures and heavy oil pollution, making their surfaces easily stained and difficult to clean, resulting in a poor user experience. While the commonly used easy-to-clean Teflon coating on the market offers excellent cleaning properties, its operating temperature must be limited to below 260°C. This makes it unsuitable for high-temperature kitchen products, such as ovens, which operate at temperatures between 200 and 500°C. Currently, oven cavities are typically constructed of stainless steel or enamel coatings. Stainless steel surfaces are susceptible to oxidation and yellowing, while enamel coatings are formed by melting inorganic powders at high temperatures, making them prone to cracking. Neither of these coatings is easy to clean, resulting in grease residue from ingredients during frying or grilling, which easily remains on the inner walls and drip tray. Consequently, a coating technology with superior cleaning properties at temperatures between 200 and 500°C is urgently needed.

[0005] In recent years, a new type of easy-to-clean ceramic coating has emerged for use in oven cavities, offering excellent cleaning performance. However, these coatings do not address issues such as cracking, peeling, long-term non-stick properties, or high-temperature resistance. Current easy-to-clean coatings struggle to meet the demands of high-temperature, heavily oiled kitchen environments.

[0006] Summary of the Invention

[0007] The present application aims to at least partially solve one of the above technical problems existing in the prior art. To this end, one of the purposes of the present application is to provide an organosilicon coating.

[0008] The second purpose of this application is to provide a method for preparing the above-mentioned organosilicon coating.

[0009] The third object of this application is to provide an organosilicon coating prepared from the above-mentioned organosilicon coating.

[0010] A fourth object of this application is to provide a method for preparing the above-mentioned organosilicon coating.

[0011] A fifth object of the present application is to provide a kitchen appliance comprising the above-mentioned silicone coating.

[0012] In order to achieve the above objectives, the technical solutions adopted in this application are:

[0013] A first aspect of the present application provides an organosilicon coating, comprising a primer coating and a topcoat coating;

[0014] The topcoat coating comprises the following preparation raw materials: a first composition, a second composition;

[0015] The primer coating comprises the following preparation materials: a second composition;

[0016] The first composition includes the following preparation raw materials: a first organosilicon precursor, a second organosilicon precursor, and a first solvent;

[0017] The second composition includes the following preparation raw materials: SiX4, a second solvent, and a catalyst;

[0018] The first organosilicon precursor includes at least one of RSiX3, R2SiX2, R3SiX or R3SiX'SiR3; the second organosilicon precursor includes at least one of YSiX3, Y2SiX2, Y3SiX or SiY4;

[0019] Wherein, each X is independently selected from -OR or halogen; each X' is independently selected from -O- or -NR-; each Y is independently selected from C6-10 aryl or C8-30 alkyl; each R is independently selected from H or C1-C7 alkyl.

[0020] In some specific embodiments of the present application, each Y is independently selected from phenyl, tolyl, ethylphenyl or C10-20 alkyl.

[0021] In some specific embodiments of the present application, each R is independently selected from H, methyl, ethyl or propyl.

[0022] In some specific embodiments of the present application, the first organosilicon precursor includes at least one of trimethoxysilane, triethoxysilane, tripropoxysilane, methyltrichlorosilane, methyltrimethoxysilane, methyltriethoxysilane, methyltripropoxysilane, dimethyldimethoxysilane, diethyldiethoxysilane, dipropyldipropoxysilane, trimethylmethoxysilane, triethylethoxysilane, tripropylpropoxysilane, dimethylethylchlorosilane, diethylmethylchlorosilane, trimethylfluorosilane, trimethylbromosilane, trimethyliodosilane, hexamethyldisiloxane or hexamethyldisilazane.

[0023] In some specific embodiments of the present application, the second organosilicon precursor includes at least one of phenyltrimethoxysilane, phenyltriethoxysilane, phenyltripropoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, ditolyldimethoxysilane, triphenylmethoxysilane, tetraphenylsilane, dodecyltrimethoxysilane, hexadecyltrimethoxysilane, dodecylmethyldimethoxysilane, dodecyldimethylmethoxysilane or dodecyltrimethylsilane.

[0024] In some specific embodiments of the present application, the SiX4 includes at least one of tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane or trimethoxychlorosilane.

[0025] In some specific embodiments of the present application, the catalyst includes at least one of hydrochloric acid, sulfuric acid, nitric acid, ammonia water, sodium hydroxide, acetic acid or formic acid.

[0026] In some specific embodiments of the present application, the first solvent and the second solvent independently include an organic solvent and water.

[0027] In some specific embodiments of the present application, the mass ratio of the primer coating to the top coating is 1:(0.5-1.5).

[0028] In some specific embodiments of the present application, the mass percentage of the first organosilicon precursor in the first composition is 10-50%.

[0029] In some specific embodiments of the present application, the mass percentage of the second organosilicon precursor in the first composition is 1 to 40%.

[0030] In some specific embodiments of the present application, in the first composition, the mass percentage of the first solvent is 10 to 85%.

[0031] In some specific embodiments of the present application, in the first composition, the mass ratio of the first organosilicon precursor to the second organosilicon precursor is 1:(0.1-0.9).

[0032] In some specific embodiments of the present application, the mass percentage of SiX4 in the second composition is 1 to 60%.

[0033] In some specific embodiments of the present application, in the second composition, the mass percentage of the second solvent is 35-90%.

[0034] In some specific embodiments of the present application, the mass percentage of the catalyst in the second composition is 0.005 to 15%.

[0035] In some specific embodiments of the present application, in the topcoat, the mass ratio of the first composition to the second composition is (0.1-2):1.

[0036] The second aspect of the present application provides a method for preparing the organosilicon coating described in the first aspect of the present application, comprising the following steps: mixing the first organosilicon precursor, the second organosilicon precursor, and the first solvent to conduct a first reaction to obtain the first composition; mixing the SiX4, the second solvent, and the catalyst to conduct a second reaction to obtain the second composition; mixing the first composition and the second composition to conduct a third reaction to obtain the topcoat; and using the second composition as the primer.

[0037] In some specific embodiments of the present application, the temperature of the second reaction is 20-120°C.

[0038] In some specific embodiments of the present application, the time of the second reaction is 5 to 20 hours.

[0039] In some specific embodiments of the present application, the temperature of the third reaction is 20-120°C.

[0040] In some specific embodiments of the present application, the third reaction time is 2 to 15 hours.

[0041] The third aspect of the present application provides an organosilicon coating, comprising a primer coating and a top coating, wherein the primer coating is formed by the primer coating included in the organosilicon coating described in the first aspect of the present application, and the top coating is formed by the top coating included in the organosilicon coating described in the first aspect of the present application.

[0042] In some embodiments of the present application, the primer coating has a thickness of 1 to 10 μm.

[0043] In some embodiments of the present application, the topcoat layer has a thickness of 0.5 to 5 μm.

[0044] In some embodiments of the present application, the water contact angle of the silicone coating is 103-110°.

[0045] In some embodiments of the present application, the oil contact angle of the silicone coating is 41-60°.

[0046] In some embodiments of the present application, the adhesion grade of the silicone coating is grade 0.

[0047] The fourth aspect of the present application provides a method for preparing the organosilicon coating described in the third aspect of the present application, comprising the following steps: sequentially coating the primer and topcoat on a substrate, and obtaining the organosilicon coating after curing.

[0048] In some specific embodiments of the present application, the curing temperature is 50-220°C.

[0049] In some specific embodiments of the present application, the curing time is 10 to 80 minutes.

[0050] The fifth aspect of the present application provides a kitchen appliance comprising the organosilicon coating described in the third aspect of the present application.

[0051] In some specific embodiments of the present application, the kitchen appliance includes at least one of an oven, a stove, or a range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] FIG1 is a test process of the easy-to-clean performance of the coating in Application Example 1.

[0053] FIG2 is a test process of the mechanical impact resistance of the coating in Application Example 1. DETAILED DESCRIPTION

[0054] The contents of the present application are further described in detail below by way of examples. It should be understood that the following examples are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Some non-essential improvements and adjustments made by those skilled in the art based on the principles set forth in the present application all fall within the scope of protection of the present application. The specific process parameters and the like in the following examples are only examples within a suitable range, and those skilled in the art can make selections within a suitable range through the description herein, rather than being limited to the specific data exemplified below. The raw materials, reagents, or devices used in the following examples and comparative examples, unless otherwise specified, can all be obtained from conventional commercial sources, or can be obtained by existing known methods.

[0055] An embodiment of the first aspect of the present application provides an organosilicon coating, including a primer coating and a topcoat coating;

[0056] The topcoat coating comprises the following preparation materials: a first composition, a second composition;

[0057] The primer coating comprises the following preparation materials: a second composition;

[0058] The first composition includes the following preparation raw materials: a first organosilicon precursor, a second organosilicon precursor, and a first solvent;

[0059] The second composition includes the following preparation materials: SiX4, a second solvent, and a catalyst;

[0060] The first organosilicon precursor includes at least one of RSiX3, R2SiX2, R3SiX or R3SiX'SiR3; the second organosilicon precursor includes at least one of YSiX3, Y2SiX2, Y3SiX or SiY4;

[0061] Wherein, each X is independently selected from -OR or halogen; each X' is independently selected from -O- or -NR-; each Y is independently selected from C6-10 aryl or C8-30 alkyl; each R is independently selected from H or C1-C7 alkyl.

[0062] In the second composition of the coating of the present application, SiX4 will form an inorganic network structure under the action of the second solvent and the catalyst, the first organosilicon precursor and the second organosilicon precursor in the first composition are hydrolyzed in the first solvent to generate the first hydrolyzate and the second hydrolyzate respectively, and after the first composition and the second composition are mixed, the product generated by the reaction of the first hydrolyzate reacts with the inorganic network structure in the second composition, which can effectively reduce the surface energy of the system and achieve the effect of easy cleaning of the coating surface; the product generated by the reaction of the second organosilicon precursor in the first solvent and the second hydrolyzate react with the inorganic network structure in the second composition, and can introduce aromatic and long-chain alkyl groups with high thermal stability into the system, thereby improving the heat resistance of the coating, and the topcoat thus obtained has excellent easy-to-clean effect and heat resistance. Furthermore, the inorganic network structure formed by the above-mentioned second composition is used as a primer, which can further improve the heat resistance of the coating and mechanical properties such as adhesion and impact resistance.

[0063] In some embodiments of the present application, the halogen includes at least one of fluorine, chlorine, bromine or iodine; in some specific embodiments of the present application, the halogen is selected from chlorine.

[0064] In some embodiments of the present application, each Y is independently selected from phenyl, tolyl, ethylphenyl, or C10-20 alkyl; in some specific embodiments of the present application, each Y is independently selected from phenyl or C10-20 alkyl; in some examples of the present application, each Y is independently selected from phenyl or C12-16 alkyl. In some specific examples of the present application, each Y is independently selected from phenyl, dodecyl, tridecyl, tetradecyl, pentadecyl, or hexadecyl.

[0065] In some embodiments of the present application, each R is independently selected from H, methyl, ethyl or propyl; in some specific embodiments of the present application, each R is independently selected from H, methyl or ethyl.

[0066] In some embodiments of the present application, each X is independently selected from -OCH3, -OC2H5, -OC3H7 or -Cl; in some specific embodiments of the present application, each X is independently selected from -OCH3, -OC2H5 or -Cl.

[0067] In some embodiments of the present application, each X' is independently selected from -O-, -NH-, -NCH3-, -NC2H5- or -NC3H7-; in some specific embodiments of the present application, in the organosilicon coating, each X' is independently selected from -O- or -NH-.

[0068] In some embodiments of the present application, the first organosilicon precursor includes at least one of trimethoxysilane, triethoxysilane, tripropoxysilane, methyltrichlorosilane, methyltrimethoxysilane, methyltriethoxysilane, methyltripropoxysilane, dimethyldimethoxysilane, diethyldiethoxysilane, dipropyldipropoxysilane, trimethylmethoxysilane, triethylethoxysilane, tripropylpropoxysilane, dimethylethylchlorosilane, diethylmethylchlorosilane, trimethylfluorosilane, trimethylbromosilane, trimethyliodosilane, hexamethyldisiloxane or hexamethyldisilazane; in some specific embodiments of the present application, the first organosilicon precursor includes at least one of methyltrimethoxysilane, methyltriethoxysilane, methyltrichlorosilane, dimethyldimethoxysilane, dimethylethylchlorosilane, hexamethyldisiloxane or hexamethyldisilazane.

[0069] In some embodiments of the present application, the second organosilicon precursor includes at least one of phenyltrimethoxysilane, phenyltriethoxysilane, phenyltripropoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, ditolyldimethoxysilane, triphenylmethoxysilane, tetraphenylsilane, dodecyltrimethoxysilane, hexadecyltrimethoxysilane, dodecylmethyldimethoxysilane, dodecyldimethylmethoxysilane or dodecyltrimethylsilane; in some specific embodiments of the present application, the second organosilicon precursor includes at least one of phenyltrimethoxysilane, diphenyldimethoxysilane, dodecyltrimethoxysilane or hexadecyltrimethoxysilane.

[0070] In some embodiments of the present application, SiX4 includes at least one of tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane or trimethoxychlorosilane; in some specific embodiments of the present application, SiX4 is selected from tetraethoxysilane.

[0071] In some embodiments of the present application, the catalyst includes at least one of hydrochloric acid, sulfuric acid, nitric acid, ammonia, sodium hydroxide, acetic acid, or formic acid. A suitable catalyst can be selected based on the specific organosilicon compound raw material to promote its hydrolysis, and is not specifically limited in the embodiments of the present application.

[0072] In some embodiments of the present application, the first solvent includes an organic solvent and water.

[0073] In some embodiments of the present application, the mass percentage of the organic solvent in the first solvent is 40-80%. In some specific embodiments of the present application, the mass percentage of the organic solvent in the first solvent is 45-75%. In some examples of the present application, the mass percentage of the organic solvent in the first solvent is 50-70%. In some specific examples of the present application, the mass percentage of the organic solvent in the first solvent is selected from 52%, 55%, 58%, 60%, 62%, 65%, or 68%.

[0074] In some embodiments of the present application, in the first solvent, the organic solvent includes at least one of an alcohol solvent, an ether solvent, or an ester solvent.

[0075] In some embodiments of the present application, among the organic solvents of the first solvent, the alcohol solvent includes at least one of methanol, ethanol, propanol, isopropanol, butanol, isobutanol, sec-butanol or tert-butanol; the ether solvent includes at least one of methyl ether, ethyl ether, propyl ether, isopropyl ether, methyl propyl ether, methyl n-butyl ether or butyl ether; the ester solvent includes at least one of methyl formate, ethyl formate, propyl formate, isopropyl formate, butyl formate, isobutyl formate, pentyl formate or isopentyl formate; in some specific embodiments of the present application, among the organic solvents of the first solvent, the alcohol solvent includes at least one of methanol, ethanol, propanol or isopropanol; the ether solvent includes at least one of methyl ether, ethyl ether, propyl ether or isopropyl ether; the ester solvent includes at least one of methyl formate, ethyl formate, propyl formate or isopropyl formate.

[0076] In some embodiments of the present application, the organic solvent in the first solvent is selected from an alcohol solvent; in some specific embodiments of the present application, the organic solvent in the first solvent includes at least one of methanol, ethanol, propanol, isopropanol, butanol, isobutanol, sec-butanol, or tert-butanol; in some examples of the present application, the organic solvent in the first solvent includes at least one of methanol, ethanol, propanol, or isopropanol. In some specific examples of the present application, the organic solvent in the first solvent is selected from methanol, ethanol, propanol, or isopropanol.

[0077] In some embodiments of the present application, the second solvent includes an organic solvent and water.

[0078] In some embodiments of the present application, the mass percentage of the organic solvent in the second solvent is 40-80%. In some specific embodiments of the present application, the mass percentage of the organic solvent in the second solvent is 45-75%. In some examples of the present application, the mass percentage of the organic solvent in the second solvent is 50-70%. In some specific examples of the present application, the mass percentage of the organic solvent in the second solvent is selected from 52%, 55%, 58%, 60%, 62%, 65%, or 68%.

[0079] In some embodiments of the present application, in the second solvent, the organic solvent includes at least one of an alcohol solvent, an ether solvent, or an ester solvent.

[0080] In some embodiments of the present application, among the organic solvents of the second solvent, the alcohol solvent includes at least one of methanol, ethanol, propanol, isopropanol, butanol, isobutanol, sec-butanol or tert-butanol; the ether solvent includes at least one of methyl ether, ethyl ether, propyl ether, isopropyl ether, methyl propyl ether, methyl n-butyl ether or butyl ether; the ester solvent includes at least one of methyl formate, ethyl formate, propyl formate, isopropyl formate, butyl formate, isobutyl formate, pentyl formate or isopentyl formate; in some specific embodiments of the present application, among the organic solvents of the second solvent, the alcohol solvent includes at least one of methanol, ethanol, propanol or isopropanol; the ether solvent includes at least one of methyl ether, ethyl ether, propyl ether or isopropyl ether; the ester solvent includes at least one of methyl formate, ethyl formate, propyl formate or isopropyl formate.

[0081] In some embodiments of the present application, the organic solvent in the second solvent is selected from an alcohol solvent; in some specific embodiments of the present application, the organic solvent in the second solvent includes at least one of methanol, ethanol, propanol, isopropanol, butanol, isobutanol, sec-butanol, or tert-butanol; in some examples of the present application, the organic solvent in the second solvent includes at least one of methanol, ethanol, propanol, or isopropanol. In some specific examples of the present application, the organic solvent in the second solvent is selected from methanol, ethanol, propanol, or isopropanol.

[0082] It can be understood that the first solvent and the second solvent are independent of each other, and in a specific implementation process, the same or different types and compositions can be independently selected.

[0083] In some embodiments of the present application, the mass ratio of the primer coating and the top coating is 1:(0.5~1.5); in some specific embodiments of the present application, the mass ratio of the primer coating and the top coating is 1:(0.8~1.2); in some examples of the present application, the mass ratio of the primer coating and the top coating is 1:0.8, 1:0.9, 1:1, 1:1.1 or 1:1.2.

[0084] In some embodiments of the present application, the mass percentage of the first organosilicon precursor in the first composition is 10-50%. In some specific embodiments of the present application, the mass percentage of the first organosilicon precursor in the first composition is 13-49%. In some examples of the present application, the mass percentage of the first organosilicon precursor in the first composition is 17-48%. In some specific examples of the present application, the mass percentage of the organosilicon precursor in the first composition is 17%, 19%, 20%, 25%, 28%, 30%, 35%, 38%, 40%, 45%, or 48%.

[0085] In some embodiments of the present application, the mass percentage of the second organosilicon precursor in the first composition is 1-40%. In some specific embodiments of the present application, the mass percentage of the second organosilicon precursor in the first composition is 8-36%. In some examples of the present application, the mass percentage of the second organosilicon precursor in the first composition is 13-32%. In some specific examples of the present application, the mass percentage of the second organosilicon precursor in the first composition is 13%, 15%, 16%, 18%, 20%, 22%, 25%, 27%, 30%, or 32%.

[0086] In some embodiments of the present application, the mass percentage of the first solvent in the first composition is 10-90%. In some specific embodiments of the present application, the mass percentage of the first solvent in the first composition is 15-80%. In some examples of the present application, the mass percentage of the first solvent in the first composition is 20-70%. In some specific examples of the present application, the mass percentage of the first solvent in the first composition is 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, or 70%.

[0087] In some embodiments of the present application, the mass ratio of the first organosilicon precursor to the second organosilicon precursor is 1:(0.1-0.9); in some specific embodiments of the present application, the mass ratio of the first organosilicon precursor to the second organosilicon precursor is 1:(0.3-0.9); in some examples of the present application, the mass ratio of the first organosilicon precursor to the second organosilicon precursor is 1:(0.4-0.8). In some specific examples of the present application, the mass ratio of the first organosilicon precursor to the second organosilicon precursor is 1:0.4, 1:0.45, 1:0.5, 1:0.55, 1:0.6, 1:0.65, 1:0.7, 1:0.75, or 1:0.8.

[0088] In some embodiments of the present application, the first composition includes the following mass percentages of preparation raw materials: 10-50% first organosilicon precursor, 1-40% second organosilicon precursor, and 10-90% first solvent; in some specific embodiments of the present application, the first composition includes the following mass percentages of preparation raw materials: 13-49% first organosilicon precursor, 8-36% second organosilicon precursor, and 15-80% first solvent; in some examples of the present application, the first composition includes the following mass percentages of preparation raw materials: 17-48% first organosilicon precursor, 13-32% second organosilicon precursor, and 20-70% first solvent.

[0089] In some embodiments of the present application, the mass percentage of SiX4 in the second composition is 1-60%; in some specific embodiments of the present application, the mass percentage of SiX4 in the second composition is 3-58%; in some examples of the present application, the mass percentage of SiX4 in the second composition is 4-56%. In some specific examples of the present application, the mass percentage of SiX4 in the second composition is 4%, 8%, 10%, 15%, 20%, 25%, 30%, 36%, 40%, 45%, 50%, or 56%.

[0090] In some embodiments of the present application, the mass percentage of the second solvent in the second composition is 35-90%. In some specific embodiments of the present application, the mass percentage of the second solvent in the second composition is 38-88%. In some examples of the present application, the mass percentage of the second solvent in the second composition is 40-86%. In some specific examples of the present application, the mass percentage of the second solvent in the second composition is 40%, 43.95%, 45%, 50%, 55%, 60%, 63%, 70%, 75%, 80%, 82%, or 86%.

[0091] In some embodiments of the present application, the mass percentage of the catalyst in the second composition is 0.005-15%. In some specific embodiments of the present application, the mass percentage of the catalyst in the second composition is 0.008-12%. In some examples of the present application, the mass percentage of the catalyst in the second composition is 0.01-10%. In some specific examples of the present application, the mass percentage of the catalyst in the second composition is 0.01%, 0.05%, 0.1%, 0.5%, 1%, 2%, 3%, 4%, 6%, 8%, or 10%.

[0092] In some embodiments of the present application, the second composition includes the following mass percentages of preparation raw materials: 1-60% SiX4, 35-90% second solvent, and 0.005-15% catalyst; in some specific embodiments of the present application, the second composition includes the following mass percentages of preparation raw materials: 3-58% SiX4, 38-88% second solvent, and 0.008-12% catalyst; in some examples of the present application, the second composition includes the following mass percentages of preparation raw materials: 4-56% SiX4, 40-86% second solvent, and 0.01-10% catalyst.

[0093] In some embodiments of the present application, the mass ratio of the first composition to the second composition in the topcoat is (0.1-2):1; in some specific embodiments of the present application, the mass ratio of the first composition to the second composition in the topcoat is (0.3-1.5):1; in some examples of the present application, the mass ratio of the first composition to the second composition in the topcoat is (0.4-0.8):1. In some specific examples of the present application, the mass ratio of the first composition to the second composition in the topcoat is 0.4:1, 0.5:1, 0.6:1, 0.7:1, or 0.8:1.

[0094] Maintaining the mass ratio of the first composition to the second composition within a specific range ensures that the product formed by the reaction with the inorganic network structure has appropriate film-forming properties and hydrophobicity, ensuring that the system does not exhibit significant phase separation or difficulty in film formation, while maintaining a high surface contact angle and hydrophobic state, resulting in a good easy-to-clean effect. If the first composition is used in an excessive amount, the system will exhibit significant phase separation and difficulty in film formation, while if the first composition is used in an insufficient amount, the system will exhibit a low surface contact angle and a hydrophilic state, without the easy-to-clean effect.

[0095] The embodiment of the second aspect of the present application provides a method for preparing the organosilicon coating of the embodiment of the first aspect of the present application, comprising the following steps: mixing a first organosilicon precursor, a second organosilicon precursor, and a first solvent to conduct a first reaction to obtain a first composition; mixing SiX4, a second solvent, and a catalyst to conduct a second reaction to obtain a second composition; mixing the first composition and the second composition to conduct a third reaction to obtain a topcoat; and using the second composition as the primer. Using this preparation method, the first organosilicon precursor and the second organosilicon precursor can first react with the first solvent to generate a product of a specific structural composition, and then further react with the inorganic network structure generated by the reaction of SiX4 in the second composition to obtain a coating system with low surface energy and good temperature resistance.

[0096] In some embodiments of the present application, when performing the first reaction, the first organosilicon precursor is first mixed with the first solvent, and then the second organosilicon precursor is added and mixed to perform the first reaction.

[0097] In some embodiments of the present application, the first reaction is carried out at room temperature, which is 10-30°C.

[0098] In some embodiments of the present application, the first reaction is to react until all raw materials are uniformly mixed, and there is no specific limitation.

[0099] In some embodiments of the present application, when performing the second reaction, SiX4 is first mixed with the second solvent, and then a catalyst is added to mix and perform the second reaction.

[0100] In some embodiments of the present application, the temperature of the second reaction is 20-120° C.; in some specific embodiments of the present application, the temperature of the second reaction is 30-100° C.; in some examples of the present application, the temperature of the second reaction is 55-80° C. In some specific examples of the present application, the temperature of the second reaction is 55° C., 60° C., 65° C., 70° C., 75° C., or 80° C.

[0101] In some embodiments of the present application, the second reaction time is 5 to 20 hours; in some specific embodiments of the present application, the second reaction time is 7 to 15 hours; in some examples of the present application, the second reaction time is 8 to 12 hours. In some specific examples of the present application, the second reaction time is 8 hours, 9 hours, 10 hours, 11 hours, or 12 hours.

[0102] In some embodiments of the present application, the temperature of the second reaction is constant.

[0103] In some embodiments of the present application, the second reaction is carried out under heating in a water bath.

[0104] In some embodiments of the present application, after the second reaction, a first aging step is further included.

[0105] In some embodiments of the present application, the first aging time is 5 to 30 hours; in some specific embodiments of the present application, the first aging time is 10 to 24 hours; in some examples of the present application, the first aging time is 18 to 24 hours. In some specific examples of the present application, the first aging time is 18 hours, 19 hours, 20 hours, 21 hours, 22 hours, 23 hours, or 24 hours.

[0106] In some embodiments of the present application, the temperature of the third reaction is 20-120° C.; in some specific embodiments of the present application, the temperature of the third reaction is 30-100° C.; in some examples of the present application, the temperature of the third reaction is 40-60° C. In some specific examples of the present application, the temperature of the third reaction is 40° C., 45° C., 50° C., 55° C., or 60° C.

[0107] In some embodiments of the present application, the third reaction time is 2 to 15 hours; in some specific embodiments of the present application, the third reaction time is 4 to 10 hours; in some examples of the present application, the third reaction time is 4 to 5 hours. In some specific examples of the present application, the third reaction time is 4 hours, 4.2 hours, 4.5 hours, 4.8 hours, or 5 hours.

[0108] In some embodiments of the present application, the temperature of the third reaction is constant.

[0109] In some embodiments of the present application, the third reaction is carried out under heating in a water bath.

[0110] In some embodiments of the present application, after the third reaction, a second aging step is further included.

[0111] In some embodiments of the present application, the second aging time is 5 to 30 hours; in some specific embodiments of the present application, the second aging time is 10 to 24 hours; in some examples of the present application, the second aging time is 18 to 24 hours. In some specific examples of the present application, the second aging time is 18 hours, 19 hours, 20 hours, 21 hours, 22 hours, 23 hours, or 24 hours.

[0112] In a third aspect, an embodiment of the present application provides an organosilicon coating, comprising a primer coating and a topcoat. The primer coating is formed from the primer coating of the organosilicon coating of the first aspect, and the topcoat is formed from the topcoat coating of the organosilicon coating of the first aspect. The primer coating thus obtained provides mechanical properties such as good adhesion and impact resistance, and can improve the heat resistance of the coating. The topcoat provides good heat resistance and easy cleaning properties.

[0113] In some embodiments of the present application, the primer coating has a thickness of 1 to 10 μm; in some specific embodiments of the present application, the primer coating has a thickness of 2 to 8 μm; in some examples of the present application, the primer coating has a thickness of 3 to 6 μm. In some specific examples of the present application, the primer coating has a thickness of 3 μm, 3.5 μm, 4 μm, 4.5 μm, 5 μm, 5.5 μm, or 6 μm.

[0114] In some embodiments of the present application, the topcoat has a thickness of 0.5 to 5 μm; in some specific embodiments of the present application, the topcoat has a thickness of 0.8 to 4 μm; in some examples of the present application, the topcoat has a thickness of 1 to 3 μm. In some specific examples of the present application, the topcoat has a thickness of 1 μm, 1.2 μm, 1.5 μm, 1.8 μm, 2 μm, 2.2 μm, 2.5 μm, 2.8 μm, or 3 μm.

[0115] In some embodiments of the present application, the water contact angle of the silicone coating is 103-110°; in some specific embodiments of the present application, the water contact angle of the silicone coating is 103°, 104°, 105°, 106°, 107°, 108°, 109°, or 110°. The water contact angle in some embodiments of the present application is measured according to ASTM D724-12.

[0116] In some embodiments of the present application, the silicone coating has an oil contact angle of 41 to 60°. In some specific embodiments of the present application, the silicone coating has a water contact angle of 41°, 42°, 45°, 48°, 50°, 52°, 55°, 58°, or 60°. The oil contact angle in some embodiments of the present application is measured according to ASTM D724-12.

[0117] In some embodiments of the present application, the temperature resistance of the silicone coating is 405-500°C; in some specific embodiments of the present application, the temperature resistance of the silicone coating is 405°C, 410°C, 420°C, 430°C, 440°C, 450°C, 460°C, 470°C, 480°C, 490°C or 500°C.

[0118] In some embodiments of the present application, the adhesion grade of the silicone coating is grade 0. The adhesion grade in the embodiments of the present application is the adhesion grade measured according to the standard GB / T 9286.

[0119] The fourth aspect of the present application provides a method for preparing the organosilicon coating according to the third aspect of the present application, comprising the steps of sequentially applying a primer and a topcoat to a substrate, and curing the resulting organosilicon coating. This method is simple and easy to operate, and can produce a heat-resistant and easy-to-clean organosilicon coating.

[0120] In some embodiments of the present application, a drying step is further included after applying the primer and before applying the topcoat.

[0121] In some embodiments of the present application, the drying time is 1 to 10 minutes; in some specific embodiments of the present application, the drying time is 2 to 8 minutes; in some examples of the present application, the drying time is 3 to 5 minutes.

[0122] In some embodiments of the present application, the drying temperature is 10-30° C.; in some specific embodiments of the present application, the drying temperature is 15-28° C.; in some examples of the present application, the drying temperature is 20-25° C. In some specific examples of the present application, the drying temperature is room temperature.

[0123] In some embodiments of the present application, the curing temperature is 50-220°C; in some specific embodiments of the present application, the curing temperature is 60-200°C; in some examples of the present application, the curing temperature is 130-200°C. In some specific examples of the present application, the curing temperature is 130°C, 140°C, 150°C, 160°C, 170°C, 180°C, 190°C, or 200°C.

[0124] In some embodiments of the present application, the curing time is 10 to 80 minutes; in some specific embodiments of the present application, the curing time is 15 to 60 minutes; in some examples of the present application, the curing time is 15 to 18 minutes. In some specific examples of the present application, the curing time is 15 minutes, 16 minutes, 17 minutes, or 18 minutes.

[0125] In some embodiments of the present application, a substrate pretreatment step is also included before applying the primer; in some specific embodiments of the present application, the substrate pretreatment step is to degrease and clean the substrate, and no sandblasting or other pretreatment is required.

[0126] In some embodiments of the present application, the substrate includes at least one of stainless steel, aluminum-plated sheet, galvanized sheet, or cold-rolled steel.

[0127] The fifth aspect of the present application provides a kitchen appliance comprising the organosilicon coating of the third aspect of the present application. The resulting kitchen appliance comprises an organosilicon coating having excellent high-temperature resistance, ease of cleaning, and mechanical properties, effectively meeting the requirements of a high-temperature, heavily oily environment in a kitchen. Therefore, the kitchen appliance provided with the organosilicon coating also has excellent heat resistance and ease of cleaning, and the coating exhibits good mechanical properties such as adhesion and impact resistance.

[0128] In some embodiments of the present application, the kitchen appliance includes at least one of an oven, a stove or a range hood; in some specific embodiments of the present application, the oven includes at least one of an electric oven, a gas oven or a steam-bake combination machine; in some examples of the present application, the base material of the oven includes at least one of stainless steel, aluminum-plated sheet, galvanized sheet or cold-rolled steel.

[0129] The contents of this application are further described in detail below with reference to specific embodiments.

[0130] In the following examples and comparative examples, the ethanol aqueous solution consists of 60 wt % ethanol and 40 wt % water; the usage percentages of the various raw materials are by mass.

[0131] Example 1

[0132] An organic silicon coating is composed of a primer coating and a top coating. The specific preparation method is as follows:

[0133] 1) mixing 35% methyltrimethoxysilane and 50% ethanol aqueous solution, and then adding 15% phenyltrimethoxysilane to obtain a first composition;

[0134] 2) adding 15% tetraethoxysilane to 82% ethanol aqueous solution and stirring evenly, adding 3% hydrochloric acid and heating in a water bath to 60° C., reacting at this temperature for 10 hours, and aging for 24 hours to obtain a second composition, which was divided into two parts, one of which was used as a primer and the other was set aside;

[0135] 3) The first composition obtained in step 1) and part of the second composition obtained in step 2) were mixed and stirred in a mass ratio of 0.5:1, reacted in a 45° C. water bath for 4 hours, and aged for 24 hours to obtain a topcoat.

[0136] Application Example 1

[0137] An organic silicon coating is composed of a primer coating and a top coating. The specific preparation method is as follows:

[0138] First, the silicone primer of Example 1 was sprayed onto the oven cavity of an aluminum plate and allowed to dry at room temperature for 3 minutes to form a primer coating. The topcoat was then sprayed onto the primer coating and cured at 200°C for 15 minutes to form a topcoat. The primer coating had a thickness of 4 μm and the topcoat had a thickness of 2 μm.

[0139] Example 2

[0140] An organic silicon coating is composed of a primer coating and a top coating. The specific preparation method is as follows:

[0141] 1) mixing 17% methyltrichlorosilane and 70% ethanol aqueous solution, and then adding 13% dodecyltrimethoxysilane to obtain a first composition;

[0142] 2) adding 36% tetraethoxysilane to a 63% ethanol aqueous solution and stirring evenly, adding 1% formic acid, heating in a water bath to 30° C., reacting at this constant temperature for 10 hours, and aging for 10 hours to obtain a second composition, which was divided into two parts, one of which was used as a primer and the other was set aside;

[0143] 3) The first composition obtained in step 1) and part of the second composition obtained in step 2) were mixed and stirred in a mass ratio of 2:1, reacted in a 30° C. water bath for 10 h, and aged for 10 h to obtain a topcoat.

[0144] Application Example 2

[0145] An organic silicon coating is composed of a primer coating and a top coating. The specific preparation method is as follows:

[0146] First, the base coating of the organosilicon coating of Example 2 was sprayed onto the oven cavity of a cold-rolled steel plate and allowed to dry at room temperature for 3 minutes to obtain a base coating. The top coating was then sprayed onto the base coating and cured at 80°C for 20 minutes to form a top coating. The base coating had a thickness of 4 μm and the top coating had a thickness of 2 μm.

[0147] Example 3

[0148] An organic silicon coating is composed of a primer coating and a top coating. The specific preparation method is as follows:

[0149] 1) mixing 19% hexamethyldisilazane and 65% ethanol aqueous solution, and then adding 16% diphenyldimethoxysilane to obtain a first composition;

[0150] 2) adding 56% tetraethoxysilane to a 43.95% ethanol aqueous solution and stirring evenly, adding 0.05% sodium hydroxide and heating in a water bath to 100° C., reacting at this constant temperature for 10 hours, and aging for 10 hours to obtain a second composition, dividing the second composition into two parts, one of which is used as a primer and the other is set aside;

[0151] 3) The first composition obtained in step 1) and part of the second composition obtained in step 2) were mixed and stirred in a mass ratio of 1:1, reacted in a 100° C. water bath for 6 h, and aged for 20 h to obtain a topcoat.

[0152] Application Example 3

[0153] An organic silicon coating is composed of a primer coating and a top coating. The specific preparation method is as follows:

[0154] First, the base coating of the silicone coating of Example 3 was sprayed into the cavity of a stainless steel oven and allowed to dry at room temperature for 3 minutes to obtain a base coating. The top coating was then sprayed on the base coating and cured at 120°C for 35 minutes to form a top coating. The base coating had a thickness of 4 μm, and the top coating had a thickness of 2 μm.

[0155] Example 4

[0156] An organic silicon coating is composed of a primer coating and a top coating. The specific preparation method is as follows:

[0157] 1) mixing 48% dimethylethylchlorosilane and 20% ethanol aqueous solution, and then adding 32% hexadecyltrimethoxysilane to obtain a first composition;

[0158] 2) adding 4% tetraethoxysilane to 86% ethanol aqueous solution and stirring evenly, adding 10% acetic acid and heating in a water bath to 50° C., reacting at this temperature for 10 hours, and aging for 10 hours to obtain a second composition, which was divided into two parts, one of which was used as a primer and the other was set aside;

[0159] 3) The first composition obtained in step 1) and part of the second composition obtained in step 2) were mixed and stirred in a mass ratio of 0.1:1, reacted in an 80° C. water bath for 10 h, and aged for 15 h to obtain a topcoat.

[0160] Application Example 4

[0161] An organic silicon coating is composed of a primer coating and a top coating. The specific preparation method is as follows:

[0162] First, the base coating of the silicone coating of Example 4 was sprayed onto the galvanized sheet oven cavity and allowed to dry at room temperature for 3 minutes to obtain a base coating. The top coating was then sprayed onto the base coating surface and finally cured at 60°C for 60 minutes to form a top coating. The base coating had a thickness of 4 μm and the top coating had a thickness of 2 μm.

[0163] Comparative Example 1

[0164] A silicone coating differs from Example 1 in that the first composition does not include methyltrimethoxysilane. Specifically, the first composition is composed of the following raw materials in the following weight percentages: 50% phenyltrimethoxysilane and 50% ethanol aqueous solution. Other raw materials and preparation methods are the same as those in Example 1.

[0165] Comparative Application Example 1

[0166] An organic silicon coating is composed of a primer coating and a top coating. The specific preparation method is as follows:

[0167] First, the base coating of the silicone coating of Comparative Example 1 was sprayed onto the oven cavity of the aluminum plate and allowed to dry at room temperature for 3 minutes to obtain a base coating. The top coating was then sprayed onto the base coating surface and finally cured at 200°C for 15 minutes to form a top coating. The base coating had a thickness of 4 μm and the top coating had a thickness of 2 μm.

[0168] Comparative Example 2

[0169] A silicone coating differs from Example 1 in that the first composition does not include phenyltrimethoxysilane. Specifically, the first composition is composed of the following raw materials in the following weight percentages: 50% methyltrimethoxysilane and 50% ethanol aqueous solution. Other raw materials and preparation methods are the same as those in Example 1.

[0170] Application Comparative Example 2

[0171] An organic silicon coating is composed of a primer coating and a top coating. The specific preparation method is as follows:

[0172] First, the base coating of the silicone coating of Comparative Example 2 was sprayed onto the oven cavity of the aluminum plate and allowed to dry at room temperature for 3 minutes to obtain a base coating. The top coating was then sprayed onto the base coating surface and finally cured at 200°C for 15 minutes to form a top coating. The base coating had a thickness of 4 μm and the top coating had a thickness of 2 μm.

[0173] Comparative Example 3

[0174] An organic silicon coating, which differs from Example 1 in that it does not include a primer coating, that is, the coating of this example is composed of the top coating prepared in Example 1.

[0175] Application Comparative Example 3

[0176] An organic silicone coating consisting only of a topcoat layer is prepared as follows:

[0177] The organosilicon coating of Comparative Example 3 was sprayed onto the oven cavity of the aluminum plate and cured at 200° C. for 15 minutes to obtain an organosilicon coating having a coating thickness of 6 μm.

[0178] Comparative Example 4

[0179] A silicone coating, which differs from Example 1 in that: the topcoat is composed of the following preparation raw materials: a first composition and a second composition in a mass ratio of 3:1; other preparation raw materials and preparation methods are the same as those in Example 1.

[0180] Comparative Application Example 4

[0181] An organic silicon coating is composed of a primer coating and a top coating. The specific preparation method is as follows:

[0182] First, the silicone primer from Comparative Example 4 was sprayed onto the oven cavity of an aluminum plate and allowed to dry at room temperature for 3 minutes to form a primer. The topcoat was then sprayed onto the primer. Due to significant phase separation in the topcoat system, film formation was poor, making it difficult to form a complete coating.

[0183] Comparative Example 5

[0184] A silicone coating, which differs from Example 1 in that: the topcoat is composed of the following preparation raw materials: a first composition and a second composition in a mass ratio of 0.05:1; other preparation raw materials and preparation methods are the same as those in Example 1.

[0185] Comparative Application Example 5

[0186] An organic silicon coating is composed of a primer coating and a top coating. The specific preparation method is as follows:

[0187] First, the base coating of the silicone coating of Comparative Example 5 was sprayed onto the oven cavity of the aluminum plate and allowed to dry at room temperature for 3 minutes to obtain a base coating. The top coating was then sprayed onto the base coating surface and finally cured at 200°C for 15 minutes to form a top coating. The base coating had a thickness of 4 μm and the top coating had a thickness of 2 μm.

[0188] Performance Testing

[0189] The coatings prepared in Examples 1 to 4 and Comparative Examples 1 to 5 were subjected to the following performance tests:

[0190] 1. The water contact angle, oil contact angle and adhesion test of the coating are as follows: the water and oil contact angle are tested using an instrument contact angle tester according to the test standard ASTM D724-12; the adhesion is tested using a paint film cross-cut tester according to the test standard GB / T 9286.

[0191] 2. The coating's easy-to-clean performance test is as follows: place seasoning sauce on the sample plate, place it at 250°C for 2 hours, and wipe the surface with a scouring pad weighing 1 kg. If 80% of the oil stain can be wiped off within 5 times, the high-temperature easy-to-clean performance is excellent, otherwise it is poor.

[0192] 3. Mechanical impact resistance test of the coating: According to GB / T 1732-2020, Determination of impact resistance of paint films, after the test sample is subjected to an impact of 50kg·cm, if only fine cracks appear at the edge of the dent, without wrinkles or peeling, the impact resistance is "no peeling", otherwise it is "peeling".

[0193] 4. Test the coating's heat resistance. The test method is as follows: Assemble the coated oven cavity into a complete unit and then conduct a life test. Place sauce at the bottom of the oven, near the heating element. Adjust the oven temperature to maintain a constant temperature. Run the oven for 1.5 hours. After cooling, clean the oven with a scouring pad. This constitutes one cycle. After 500 hours, terminate the test if the oil stain is difficult to clean. Record the oven bottom temperature as the coating's heat resistance temperature.

[0194] The test results are recorded in Table 1.

[0195] Table 1 Performance test results of the coatings obtained by using Examples 1 to 4 and Comparative Examples 1 to 5

[0196] As shown in Table 1, compared with the comparative examples, the coatings prepared by Examples 1 to 4 of the present application have higher advantages in terms of adhesion, high temperature resistance, impact resistance, and easy cleaning. The coatings prepared by Comparative Examples 1 and 2 have poor easy cleaning effects at 300-350°C and poor temperature resistance. The coating of Comparative Example 3 has low adhesion and is easy to fall off during the mechanical impact test. The first composition used in Comparative Example 4 is too much, resulting in obvious phase separation in the system, poor film-forming properties, and difficulty in forming a complete coating. The first composition used in Comparative Example 5 is too little, resulting in a low contact angle on the coating surface, making it hydrophilic and not easy to clean.

[0197] The easy-to-clean performance test process of the coating of Application Example 1 is shown in Figure 1. (A) shows an unwiped image of the coating of Application Example 1 after placing seasoning sauce on it for 2 hours at 250°C. (B) shows an image of the coating after wiping the surface with a scouring pad weighing 1 kg. Within 5 wipings, 80% of the oily area was removed, demonstrating excellent easy-to-clean performance. The mechanical impact resistance test process of the coating of Application Example 1 is shown in Figure 2. After a 50 kg·cm impact on the coating sample of Application Example 1, only fine cracks were observed at the edges of the indentations, with no wrinkles or peeling observed, indicating that the coating exhibited excellent mechanical impact resistance. The oven cavity coated with the coating of Application Example 1 was assembled into a complete machine and then subjected to a life test. The sauce was placed at the bottom of the oven near the heating element (temperature greater than 400°C), and the oven temperature was set to 220°C for 1.5 hours. After the oven cooled, it was cleaned with a scouring pad. This cycle lasted until the food became difficult to clean. After 500 hours of testing, the oven cavity still maintained excellent easy-to-clean performance, indicating good temperature resistance and long service life. The performance of Application Examples 2 to 4 was similar to that of Application Example 1.

[0198] In the embodiments of the present application, the organosilicon coating of the embodiments of the present application is applied to kitchen appliances to obtain high-temperature resistant and easy-to-clean kitchen appliances. The kitchen appliances include ovens, stoves, or range hoods; the ovens include electric ovens, gas ovens, or oven-steamers.

[0199] The embodiments of the present application use three organosilicon compounds with specific structures. Through the specific reaction of the three, a coating system with good temperature resistance, hydrophobicity, adhesion and impact resistance is formed. Using this coating system, a coating that is resistant to high temperatures, easy to clean, and has good mechanical properties can be obtained. It can be used to protect kitchen appliances, especially ovens, and can well meet the needs of high-temperature and heavily oily environments in the kitchen.

[0200] Throughout this specification, references to terms such as "some embodiments," "examples," or "specific embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with such embodiments or examples are included in at least one embodiment or example of the present application. In this specification, schematic representations 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 any one or more embodiments or examples.

Claims

1. An organosilicon coating, comprising a primer coating and a topcoat, wherein, the topcoat comprises the following raw materials for preparation: a first composition, a second composition; the primer coating comprises the following raw materials for preparation: the second composition; the first composition comprises the following raw materials for preparation: a first organosilicon precursor, a second organosilicon precursor, a first solvent; the second composition comprises the following raw materials for preparation: SiX4, a second solvent, a catalyst; the first organosilicon precursor comprises at least one of RSiX3, R2SiX2, R3SiX or R3SiX’SiR3; the second organosilicon precursor comprises at least one of YSiX3, Y2SiX2, Y3SiX or SiY4; wherein, each X is independently selected from -OR or halogen; each X’ is independently selected from -O- or -NR-; each Y is independently selected from C6-10 aryl or C8-30 alkyl; each R is independently selected from H or C1-C7 alkyl.

2. The silicone coating according to claim 1, wherein Each Y is independently selected from phenyl, tolyl, ethylphenyl or C10-20 alkyl; and / or, each R is independently selected from H, methyl, ethyl or propyl.

3. The silicone coating according to claim 1 or 2, wherein, The first organosilicon precursor comprises at least one of trimethoxysilane, triethoxysilane, tripropoxysilane, methyltrichlorosilane, methyltrimethoxysilane, methyltriethoxysilane, methyltripropoxysilane, dimethyldimethoxysilane, diethyldiethoxysilane, dipropyldipropoxysilane, trimethylmethoxysilane, triethylethoxysilane, tripropylpropoxysilane, dimethylethylchlorosilane, diethylethylchlorosilane, trimethylfluorosilane, trimethylbromosilane, trimethyliodosilane, hexamethyldisiloxane or hexamethyldisilazane; and / or, the second organosilicon precursor comprises at least one of phenyltrimethoxysilane, phenyltriethoxysilane, phenyltripropoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, dimethyldiphenyldimethoxysilane, triphenylmethoxysilane, tetraphenylsilane, dodecyltrimethoxysilane, hexadecyltrimethoxysilane, dodecylmethyldimethoxysilane, dodecyldimethylmethoxysilane or dodecyltrimethylsilane.

4. The silicone coating according to any one of claims 1 to 3, wherein, The SiX4 comprises at least one of tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane or trimethoxychlorosilane.

5. The silicone coating according to any one of claims 1 to 4, wherein, The catalyst comprises at least one of hydrochloric acid, sulfuric acid, nitric acid, ammonia water, sodium hydroxide, acetic acid or formic acid; and / or, the first solvent and the second solvent independently comprise an organic solvent and water.

6. The silicone coating according to any one of claims 1 to 5, wherein, In the first composition, the mass percentage of the first organosilicon precursor is 10-50%; and / or, the mass percentage of the second organosilicon precursor is 1-40%.

7. The silicone coating according to any one of claims 1 to 6, wherein, In the first composition, the mass percentage of the first solvent is 10-85%.

8. The silicone coating according to any one of claims 1 to 7, wherein, In the first composition, the mass ratio of the first organosilicon precursor to the second organosilicon precursor is 1:(0.1-0.9).

9. The silicone coating according to any one of claims 1 to 8, wherein, In the second composition, the mass percentage of SiX4 is 1-60%.

10. The silicone coating according to any one of claims 1 to 9, wherein, In the second composition, the mass percentage of the second solvent is 35-90%; And / or, in the second composition, the mass percentage of the catalyst is 0.005 to 15%.

11. The silicone coating according to any one of claims 1 to 10, wherein, In the topcoat paint, the mass ratio of the first composition to the second composition is (0.1 to 2):

1.

12. The silicone coating according to any one of claims 1 to 11, wherein, The mass ratio of the primer paint to the topcoat paint is 1:(0.5 to 1.5).

13. The preparation method of the silicone coating according to any one of claims 1 to 12, comprising the following steps: Mix the first organosilicon precursor, the second organosilicon precursor, and the first solvent to carry out a first reaction to obtain the first composition; Mix the SiX4, the second solvent, and the catalyst to carry out a second reaction to obtain the second composition; mix the first composition and the second composition to carry out a third reaction to obtain the topcoat paint; Use the second composition as the primer paint.

14. The preparation method according to claim 13, wherein, The temperature of the second reaction is 20 to 120 °C; And / or, the time of the second reaction is 5 to 20 h; And / or, the temperature of the third reaction is 20 to 120 °C; And / or, the time of the third reaction is 2 to 15 h.

15. The preparation method according to claim 13 or 14, wherein, After the second reaction, it further includes a step of first aging; And / or, after the third reaction, it further includes a step of second aging.

16. An organosilicon coating, comprising a primer coating and a topcoat coating, wherein the primer coating is formed by the primer paint in the organosilicon paint according to any one of claims 1 to 12, and the topcoat coating is formed by the topcoat paint in the organosilicon paint according to any one of claims 1 to 12.

17. The silicone coating according to claim 16, wherein, The thickness of the primer coating is 1 to 10 μm, and the thickness of the topcoat coating is 0.5 to 5 μm; And / or, the water contact angle of the organosilicon coating is 103 to 110°; And / or, the oil contact angle of the organosilicon coating is 41 to 60°; And / or, the adhesion grade of the organosilicon coating is grade 0.

18. The method for preparing the silicone coating according to claim 16 or 17 further comprises the following steps: Coat the primer paint and the topcoat paint on the substrate in sequence, and obtain the organosilicon coating after curing.

19. A kitchen appliance, comprising the organosilicon coating according to any one of claims 16 to 18.

20. The kitchen appliance according to claim 19, comprising at least one of an oven, a stove, or a range hood.

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