CN109370426B

CN109370426B - Coating composition and preparation method thereof, coated piece and preparation method thereof, and household appliance

Info

Publication number: CN109370426B
Application number: CN201811172159.6A
Authority: CN
Inventors: 赵莉
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2018-10-08
Filing date: 2018-10-08
Publication date: 2020-12-22
Anticipated expiration: 2038-10-08
Also published as: CN109370426A

Abstract

The invention provides a coating composition, a preparation method of the coating composition, a coating piece prepared from the coating composition, a preparation method of the coating piece and a household appliance using the coating piece. The preparation raw materials of the coating composition comprise polysilazane, polysiloxane and fluorine modified antifouling agent, wherein the polysilazane and the polysiloxane are subjected to copolymerization reaction to generate a polysilazane-polysiloxane copolymer, and the fluorine modified antifouling agent is mixed with the polysilazane-polysiloxane copolymer. The coating prepared from the coating composition has the advantages of high hardness, good adhesiveness, easy cleaning, good temperature resistance, food contact safety level and the like.

Description

Coating composition and preparation method thereof, coated piece and preparation method thereof, and household appliance

Technical Field

The invention relates to the technical field of household appliances, in particular to a coating composition, a preparation method of the coating composition, a coating piece prepared from the coating composition, a preparation method of the coating piece and a household appliance using the coating piece.

Background

In the field of micro-baking, a coating is generally required to be formed on the surface of a kitchen electrical product, and the coating is mainly made of the following materials: enamel (the enamel can be formed on the surface of a product by an enamel process), organic silicon, epoxy powder (the epoxy powder can be sprayed on the surface of the product by a powder spraying mode), or silica sol and organic silicon hybrid coating. However, the coatings described above have the disadvantages of low hardness, poor adhesion, poor temperature resistance, difficulty in cleaning, and not reaching food contact safety levels.

Disclosure of Invention

The invention mainly aims to provide a coating composition, aiming at ensuring that a coating prepared from the coating composition has the advantages of high hardness, good adhesiveness, good temperature resistance, easy cleaning and capability of reaching the food contact safety level.

In order to solve the above-mentioned problems, the present invention provides a coating composition comprising a polysilazane, a polysiloxane, and a fluorine-modified antifouling agent, wherein the polysilazane and the polysiloxane are copolymerized to form a polysilazane-polysiloxane copolymer, and the fluorine-modified antifouling agent is mixed with the polysilazane-polysiloxane copolymer.

Further, the polysilazane accounts for 7-96.99% of the raw materials, the polysiloxane accounts for 3-73% of the raw materials, and the fluorine-modified antifouling agent accounts for 0.01-20% of the raw materials.

Further, the fluorine-modified antifouling agent is selected from the group consisting of methyl perfluoroamyl ketone, 1-methyl-3-trifluoromethyl-2-pyrrolidone, 1H-perfluoro-1-tetradecanol, 1-fluoroheptane, potassium tridecafluorohexane-1-sulfonate, perfluoro-n-pentane, [ (4-fluorophenoxy) methyl ] oxirane, 2H-perfluoro-5, 8, 11, 14, 17-pentamethyl-3, 6, 9, 12, 15, 18-hexaoxaheneicosane, 2- (trifluoromethyl) -3-ethoxydodecafluorohexane, decafluoro-4- (pentafluoroethyl) epoxyhexane sulfonate potassium salt, 1, 1, 1, 2, 2, 3, 4, 5, 5, 6, 6, 6-dodecafluoro-3, 4-bis (trifluoromethyl) hexane, perfluoroeicosane, 1H, 6H-perfluorohexane, 1, 7-difluoroheptane, 1, 1, 1, 2, 2, 3, 3, 4, 5, 5, 6, 6, 6-tridecafluorohexane, 1, 1, 2, 2, 5, 5, 6, 6-octylfluorohexane, perfluoro-p-menthane, heptafluoropropane, perfluoroheptane, perfluoro (methyldecahydronaphthalene), perfluoropolyether, perfluoro-1-butanesulfonic acid, perfluoropentane, perfluoro (methylcyclohexane), perfluoro (2, 2, 3, 3-tetramethylbutane), perfluoro-1-octane, perfluorohexane, N-perfluoro-N-decane, perfluoro-1, 2-dimethylcyclohexane, perfluoropentadecane, perfluorononane, perfluoro-N-butane, perfluorododecane, perfluorotetradecane, perfluoropentadecane, perfluorotetradecane, perfluorodecane, perfluoroheptadecahydroheptane, perfluoroheptane, Perfluoro-2, 7-dimethyloctane, perfluorohexadecane, perfluoro-2, 3, 5, 6-tetramethylcyclohexane, perfluorotridecane, perfluoromethylcyclopentane, perfluorodimethylcyclobutane, (perfluorohexyl) benzene, perfluoro- (1, 3, 5-trimethylbenzene), perfluorobutylethane, perfluorobutyl ether, perfluorotetracosane, perfluorohexylethane, perfluorotetraethylene glycol dimethyl ether, perfluoro-2-methylbutane, perfluoro-p-menthane, perfluorooctylethane, 3- (perfluorohexyl) propylene oxide, 3- (2-perfluorohexylethoxy) -1, 2-propylene oxide, 3- (perfluoron-butane) -1, 2-propylene oxide, 3- (perfluoro-n-octane) -1, 2-epoxypropane, 1H-perfluoro-1-tetradecane, 2H-perfluoro 15-methyl-3, 6-dioxanonane, 3- (perfluoro-5-methylhexyl) -1, 2-epoxypropane, 1H-perfluoropentane, 1- (perfluoro-n-hexyl) dodecane, 1- (perfluoro-n-octyl) tetradecane, 1H, 6H-perfluorohexane, 1- (perfluoro-n-hexyl) decane, 1H-perfluoro-2, 4, 4, -trimethylpentane, 1H, 10H-perfluorodecane, 1H-perfluoro-2, 6-dimethylheptane, 1-methyl-4- (perfluoroethyl) toluene, 1H-perfluoro-2, 6-dimethylheptane, 2H-perfluoro (2-methylpentane), ethyl perfluorobutyl ether, 8-perfluorodecyl octane, perfluoroisobutane, perfluorobutyl methyl ether, perfluoropropylene oxide, 2-trifluoromethylperfluoropentane, and 2H-3H-perfluoropentane.

Further, the polysilazane has a structural formula:

wherein R is₁Is hydrogen radical, alkane, cycloalkane, alkene, aryl, alkoxy, alkyl siloxy or alkylamino radical, R₂Is hydrogen radical, alkane, cycloalkane, alkene, aryl, alkoxy, alkyl siloxy or alkylamino radical, R₃Is hydrogen radical, alkane, cycloalkane, alkene, aryl, alkoxy, alkyl siloxane radical or alkyl amine radical.

Further, said R₁And R₂At least one of which is a hydrogen radical or an alkene.

Furthermore, the molecular weight of the polysilazane is 100-1000.

Further, the polysiloxane has the structural formula:

wherein R is₄Is hydrogen radical, alkane, cycloalkane, alkene, aryl, alkoxy, or alkyl siloxy, R₅Is hydrogen radical, alkane, cyclane, alkene, aryl, alkoxy or alkyl siloxy.

Furthermore, the molecular weight of the polysiloxane is 100-1300.

Further, the raw materials for preparing the coating composition also comprise a solvent, wherein the solvent accounts for 10-66% of the mass of the coating composition, and is selected from at least one of alkane solvents, ether solvents, ketone solvents and benzene derivative solvents.

Further, the alkane solvent is selected from at least one or more of n-hexane, n-octane, n-decane, chloroform, dichloromethane, dichloroethylene and mineral oil; the ether solvent is at least one selected from diethyl ether, petroleum ether and dibutyl ether; the ketone solvent is selected from at least one of acetone, methyl ethyl ketone, cyclohexanone and isophorone; the benzene derivative solvent is at least one selected from toluene, m-xylene, p-xylene, o-xylene, and chlorobenzene.

Further, the raw materials for preparing the coating composition also comprise a catalyst, wherein the catalyst accounts for 0.01-5% of the raw materials for preparing by mass, and the catalyst is an amine catalyst and/or a metal catalyst.

Further, the amine catalyst is selected from one or more of aliphatic amine, alicyclic amine, alcohol amine and aromatic amine, and the aliphatic amine is selected from at least one of diethylamine, triethylamine and triethylene tetramine; the alicyclic amine is at least one selected from triethylene diamine, piperazine, piperidine and morpholine; the alcohol amine is at least one selected from N, N-dimethylethanolamine, diisopropanolamine and N, N-diethylethanolamine; the aromatic amine is at least one selected from aniline, o-phenylenediamine, benzidine and N, N-dimethylaniline.

Further, the metal catalyst is an organic tin catalyst and/or a palladium catalyst, and the organic tin catalyst is at least one selected from dibutyltin dilaurate, stannous octoate, dimethyl tin and triphenyl tin; the palladium catalyst is at least one selected from carbon/palladium, palladium chloride, palladium propionate salt, palladium acetate salt and palladium triphenylphosphine.

Further, the raw materials for preparing the coating composition also comprise a filler, wherein the filler accounts for 1-50% of the raw materials for preparing, and is selected from at least one of silicon carbide, aluminum oxide, titanium oxide, zinc oxide, magnesium oxide, aluminum hydroxide, white carbon black, attapulgite, kaolin, bentonite, glass microspheres and ceramic microspheres.

Furthermore, the raw materials for preparing the coating composition also comprise a catalyst and a filler, wherein the catalyst accounts for 0.01-5% of the coating composition by mass, the filler accounts for 1-50% of the coating composition by mass, and the polysiloxane and the polysilazane account for 10-80% of the coating composition by mass.

The invention also provides a preparation method of the coating composition, which comprises the following steps:

providing preparation raw materials, wherein the preparation raw materials comprise polysilazane, polysiloxane and fluorine-modified antifouling agent;

mixing polysilazane and polysiloxane, and carrying out copolymerization reaction on the polysilazane and the polysiloxane to generate a polysilazane-polysiloxane copolymer;

adding a fluorine-modified stain resistant agent to the polysilazane-polysiloxane copolymer to prepare the coating composition.

Further, after mixing the polysilazane and the polysiloxane, the method for preparing the coating composition further comprises: and adding a catalyst into the polysilazane and the polysiloxane, wherein the catalyst accounts for 0.01-5% of the mass of the preparation raw material, and the catalyst is an amine catalyst and/or a metal catalyst.

Further, after the polysilazane-polysiloxane copolymer is formed and before the coating composition is prepared, the method for preparing the coating composition further comprises: and adding a solvent into the polysilazane-polysiloxane copolymer, wherein the solvent accounts for 10-66% of the mass of the raw materials, and the solvent is selected from at least one of alkane solvents, ether solvents, ketone solvents and benzene derivative solvents.

Further, after the polysilazane-polysiloxane copolymer is formed and before the coating composition is prepared, the method for preparing the coating composition further comprises: and adding a filler into the polysilazane-polysiloxane copolymer, wherein the filler accounts for 1-50% of the mass of the preparation raw materials, and the filler is selected from at least one of silicon carbide, aluminum oxide, titanium oxide, zinc oxide, magnesium oxide, aluminum hydroxide, white carbon black, attapulgite, kaolin, bentonite, glass microspheres and ceramic microspheres.

The invention also provides a coated piece, which comprises a substrate and a coating layer formed on the surface of the substrate, wherein the coating layer contains the coating composition.

Further, the thickness of the coating ranges from 1 micron to 100 microns.

The invention also provides a preparation method of the coating member, which comprises the following steps:

providing a substrate and the coating composition;

and coating the coating composition on the surface of a substrate to obtain the coated piece.

The invention also provides a household appliance comprising the coating element.

The preparation raw materials of the coating composition comprise polysilazane, polysiloxane and fluorine-modified antifouling agent, the polysilazane and the polysiloxane can generate copolymerization reaction to generate polysilazane-polysiloxane copolymer, and the polysilazane-polysiloxane copolymer has the advantages of high hardness, good adhesiveness and good temperature resistance, so that a coating formed by the coating composition has the advantages of high hardness, good adhesiveness and good temperature resistance. The coating composition also contains a fluorine modified antifouling agent mixed with the polysilazane-polysiloxane copolymer, and the fluorine modified antifouling agent can ensure that a coating formed by the coating composition also has the advantage of easy cleaning. Because the polysilazane, the polysiloxane, the polysilazane-polysiloxane copolymer and the fluorine modified antifouling agent do not belong to toxic and harmful substances, the coating prepared from the coating composition has the advantage of reaching the food contact safety level.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture, and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The present invention provides a coating composition.

The preparation raw materials of the coating composition comprise polysilazane, polysiloxane and fluorine modified antifouling agent, wherein the polysilazane and the polysiloxane are subjected to copolymerization reaction to generate a polysilazane-polysiloxane copolymer, and the fluorine modified antifouling agent is mixed with the polysilazane-polysiloxane copolymer.

The polysilazane accounts for 7-96.99% of the preparation raw material by mass, the polysiloxane accounts for 3-73% of the preparation raw material by mass, and the fluorine-modified antifouling agent accounts for 0.01-20% of the preparation raw material by mass.

In an embodiment of the invention, the polysilazane accounts for 7-96.99% of the preparation raw material by mass. Preferably, the polysilazane accounts for 10-80% of the mass of the preparation raw material, more preferably 15-70%, and even more preferably 20-50%.

In an embodiment of the invention, the polysiloxane accounts for 3-73% of the preparation raw material by mass. Preferably, the polysiloxane accounts for 10-60% of the mass of the preparation raw materials, more preferably 15-50%, and even more preferably 20-40%.

In an embodiment of the present invention, the fluorine-modified antifouling agent accounts for 0.01 to 20% by mass of the raw material. Preferably, the fluorine-modified antifouling agent accounts for 1 to 20 mass%, more preferably 5 to 20 mass%, and still more preferably 10 to 15 mass% of the raw material.

According to the technical scheme, the polysilazane accounts for 7-96.99% of the preparation raw material by mass, the polysiloxane accounts for 3-73% of the preparation raw material by mass, the fluorine modified antifouling agent accounts for 0.01-20% of the preparation raw material by mass, the polysilazane-polysiloxane copolymer with a better content can be generated by the polysilazane and the polysiloxane, and after the polysilazane-polysiloxane copolymer is mixed with the fluorine modified antifouling agent with a better content, the coating composition with a better performance can be prepared, so that the coating prepared from the coating composition has the advantages of high hardness, good adhesiveness, easiness in cleaning, good temperature resistance, food contact safety level and the like.

The fluorine-modified antifouling agent is selected from the group consisting of methyl perfluoroamyl ketone, 1-methyl-3-trifluoromethyl-2-pyrrolidone, 1H-perfluoro-1-tetradecanol, 1-fluoroheptane, potassium tridecafluorohexane-1-sulfonate, perfluoro-n-pentane, [ (4-fluorophenoxy) methyl ] oxirane, 2H-perfluoro-5, 8, 11, 14, 17-pentamethyl-3, 6, 9, 12, 15, 18-hexaoxaheneicosane, 2- (trifluoromethyl) -3-ethoxydodecafluorohexane, decafluoro-4- (pentafluoroethyl) oxiranesulfonic acid potassium salt, 1, 1, 1, 2, 2, 3, 4, 5, 5, 6, 6, 6-dodecafluoro-3, 4-bis (trifluoromethyl) hexane, 1H-perfluoro-1-tetradecanol, 1-fluoroheptane, 1-fluoropentane, 2-sulfonic acid potassium tridecane, 2H-perfluorohexane, 2, Perfluoroeicosane, 1H, 6H-perfluorohexane, 1, 7-difluoroheptane, 1, 1, 1, 2, 2, 3, 3, 4, 5, 5, 6, 6, 6-tridecafluorohexane, 1, 1, 2, 2, 5, 5, 6, 6-octylfluorohexane, perfluoro-p-menthane, heptafluoropropane, perfluoroheptane, perfluoro (methyldecalin), perfluoropolyether, perfluoro-1-butanesulfonic acid, perfluoropentane, perfluoro (methylcyclohexane), perfluoro (2, 2, 3, 3-tetramethylbutane), perfluoro-1-octane, perfluorohexane, N-perfluoro-N-decane, perfluoro-1, 2-dimethylcyclohexane, perfluoropentadecane, perfluorononane, perfluoron-butane, perfluorododecane, perfluorotetradecane, perfluoro-2, 7-dimethyloctane, perfluorooctane, perfluorohexane, perfluoroheptane, perfluorodecane, perfluorododecane, perfluorotetradecane, perfluorododecane, perfluorooctane, perfluorohexadecane, perfluoro-2, 3, 5, 6-tetramethylcyclohexane, perfluorotridecane, perfluoromethylcyclopentane, perfluorodimethylcyclobutane, (perfluorohexyl) benzene, perfluoro- (1, 3, 5-trimethylbenzene), perfluorobutylethane, perfluorobutyl ether, perfluorotetracosane, perfluorohexylethane, perfluorotetraethylene glycol dimethyl ether, perfluoro-2-methylbutane, perfluoro-p-menthane, perfluorooctylethane, 3- (perfluorohexyl) propylene oxide, 3- (2-perfluorohexylethoxy) -1, 2-propylene oxide, 3- (perfluoron-butane) -1, 2-propylene oxide, 3- (perfluoron-octane) -1, 2-propylene oxide, 1H, 1H-perfluoro-1-tetradecane, 2H-perfluoro-15-methyl-3, 6-dioxanonane, 3- (perfluoro-5-methylhexyl) -1, 2-epoxypropane, 1H-perfluoropentane, 1- (perfluoro-n-hexyl) dodecane, 1- (perfluoro-n-octyl) tetradecane, 1H, 6H-perfluorohexane, 1- (perfluoro-n-hexyl) decane, 1H-perfluoro-2, 4, 4-trimethylpentane, 1H, 10H-perfluorodecane, 1H-perfluoro-2, 6-dimethylheptane, 1-methyl-4- (perfluoroethyl) toluene, 2H-perfluoro (2-methylpentane), At least one of ethyl perfluorobutyl ether, 8-perfluorodecyl octane, perfluoroisobutane, perfluorobutyl methyl ether, perfluoropropylene oxide, 2-trifluoromethylperfluoropentane, and 2H-3H-perfluoropentane.

In the technical scheme of the invention, the coating composition contains the fluorine modified antifouling agent, so that a coating prepared from the coating composition has the advantage of easy cleaning, and the fluorine modified antifouling agent is not a toxic or harmful substance, so that the coating composition can reach the food contact safety level.

It should be noted that the fluorine-modified antifouling agent may also be other substances that can achieve the same or similar functions, and the present invention is not limited thereto.

The structural formula of the polysilazane is as follows:

The polysiloxane has the structural formula:

In one embodiment of the present invention, R₁And R₂At least one of the two is a hydrogen radical or an alkene.

It is understood that both the polysilazane and the polysiloxane are high temperature materials.

Understandably, R₁、R₂And R₃Can be the same group or different groups, and can be adjusted according to actual requirements.

Understandably, R₄And R₅Can be the same group or different groups, and can be adjusted according to actual requirements.

In addition, R is₁、R₂And R₃Other groups capable of achieving the same or similar functions can be used, and the invention is not limited to the groups; r₄And R₅Other groups that perform the same or similar functions may be used, and the present invention is not limited thereto.

In the technical scheme of the invention, the polysilazane can be subjected to copolymerization reaction with the polysiloxane to generate the main resin of the coating composition, so that a coating prepared from the coating composition has the advantages of high hardness, good adhesiveness, good temperature resistance and food contact safety level.

The molecular weight of the polysilazane is 100-1000.

The molecular weight of the polysiloxane is 100-1300.

In one embodiment of the present invention, the polysilazane has a molecular weight of 100, 200, 300, 400, 500, 600, 700, 800, 900 or 1000.

In an embodiment of the present invention, the molecular weight of the polysilazane is preferably 100 to 700, and more preferably 100 to 300.

In one embodiment of the invention, the polysiloxane has a molecular weight of 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, or 1300.

In one embodiment of the present invention, the molecular weight of the polysiloxane is preferably 200 to 900, and more preferably 200 to 500.

According to the technical scheme, the molecular weight of polysilazane is 100-1000, the molecular weight of polysiloxane is 100-1300, the polysilazane with the molecular weight of 100-1000 and the polysiloxane with the molecular weight of 100-1300 are subjected to copolymerization reaction to generate a polysilazane-polysiloxane copolymer, and after a coating composition containing the polysilazane-polysiloxane copolymer is coated on a substrate to form a coating, the coating has good hardness, adhesiveness and temperature resistance.

The raw materials for preparing the coating composition further comprise a solvent, wherein the solvent accounts for 10-66% of the raw materials for preparing, preferably 15-50%, more preferably 20-40%, and further preferably 30-35% by mass.

The solvent may be at least one selected from the group consisting of alkane solvents, ether solvents, ketone solvents, and benzene derivative solvents.

The alkane solvent can be at least one selected from n-hexane, n-octane, n-decane, chloroform, dichloromethane, dichloroethylene and mineral oil.

The ether solvent can be at least one selected from diethyl ether, petroleum ether and dibutyl ether.

The ketone solvent may be at least one selected from acetone, methyl ethyl ketone, cyclohexanone, and isophorone.

The benzene derivative solvent is at least one selected from toluene, m-xylene, p-xylene, o-xylene, and chlorobenzene.

It should be noted that other solvents that can dissolve the polysiloxane-polysilazane copolymer and the fluorine-modified antifouling agent may be used as the solvent of the present invention, and the present invention is not limited thereto.

The polysilazane-polysiloxane copolymer and the fluorine-modified antifouling agent are soluble in a solvent, so that the coating composition can be easily applied to the surface of a substrate, and has antifouling and easy-to-clean effects.

The raw materials for preparing the coating composition also comprise a catalyst, wherein the catalyst accounts for 0.01-5% of the raw materials for preparing, preferably 0.1-5%, more preferably 1-5%, and even more preferably 2-3% by mass.

The catalyst is an amine catalyst and/or a metal catalyst.

The amine catalyst can be selected from one or more of aliphatic amine, alicyclic amine, alcohol amine and aromatic amine.

The fatty amine can be at least one selected from diethylamine, triethylamine and triethylene tetramine.

The alicyclic amine may be selected from at least one of triethylenediamine, piperazine, piperidine, and morpholine.

The alcohol amine may be at least one selected from the group consisting of N, N-dimethylethanolamine, diisopropanolamine, and N, N-diethylethanolamine.

The aromatic amine is at least one selected from aniline, o-phenylenediamine, benzidine and N, N-dimethylaniline.

The metal-based catalyst may be an organotin catalyst and/or a palladium-based catalyst.

The organic tin catalyst can be at least one selected from dibutyltin dilaurate, stannous octoate, dimethyl tin and triphenyl tin.

The palladium catalyst may be at least one selected from carbon/palladium, palladium chloride, palladium propionate salt, palladium acetate salt, and palladium triphenylphosphine.

It should be noted that other catalysts with similar properties can also be used as the catalyst of the present invention, and the present invention is not limited thereto.

The catalyst can accelerate the copolymerization reaction between polysilazane and polysiloxane, thereby producing the polysilazane-polysiloxane copolymer in a short time.

The raw materials for preparing the coating composition further comprise a filler, wherein the filler accounts for 1-50% of the raw materials for preparing, preferably 5-40%, preferably 10-30%, and more preferably 15-25% by mass.

The filler is at least one selected from silicon carbide, aluminum oxide, titanium oxide, zinc oxide, magnesium oxide, aluminum hydroxide, white carbon black (silicon dioxide aerogel), attapulgite, kaolin, bentonite, glass microspheres and ceramic microspheres.

The particle size of the filler may be less than 3 microns, preferably less than 2 microns, more preferably 1 micron.

In an embodiment of the present invention, the particle size of the filler ranges from 0.2 to 0.8 μm. It is understood that the particle size of the filler is 0.2 microns, 0.3 microns, 0.4 microns, 0.5 microns, 0.6 microns, 0.7 microns, or 0.8 microns.

It can be understood that when the particle size of the filler is set to 0.2 to 0.8 μm, the filler can be uniformly dispersed in the coating composition, and the surface of the prepared coating is relatively flat.

In another embodiment of the present invention, the particle size of the filler is in the range of 0.2 to 0.5 μm to obtain a smoother coating.

In one embodiment of the present invention, the filler may be ground by a grinder to reduce the particle size of the filler.

In another embodiment of the present invention, the primary coating product may be subjected to a milling treatment to reduce the particle size of the filler in the coating composition.

In one embodiment of the present invention, the filler may be uniformly dispersed in the coating composition.

In the technical scheme of the invention, the filler is selected from at least one of silicon carbide, aluminum oxide, titanium oxide, zinc oxide, magnesium oxide, aluminum hydroxide, white carbon black (silicon dioxide aerogel), attapulgite, kaolin, bentonite, glass microspheres and ceramic microspheres, so as to improve the hardness, adhesiveness and temperature resistance of the coating prepared from the coating composition.

It should be noted that other fillers with high temperature resistance can also be used as the filler of the present invention, and the present invention is not limited thereto.

It will be appreciated that the solvents, catalysts and fillers of the present invention are also not toxic or hazardous materials, so that coatings made from the coating compositions also have the advantage of food contact safety.

The raw materials for preparing the coating composition may further include a colorant. The pigment accounts for 0.01-15% of the preparation raw materials by mass, 1-15% of the preparation raw materials by mass, 5-15% of the preparation raw materials by mass is more preferable, and 5-10% of the preparation raw materials by mass is further preferable.

The coloring material is at least one selected from the group consisting of a white coloring material, a yellow coloring material, an orange coloring material, a black coloring material, a purple coloring material, a brown coloring material, a green coloring material, a blue coloring material, a gray coloring material, and a red coloring material.

According to the technical scheme, the paint composition contains pigments which can be white pigments, yellow pigments, orange pigments, black pigments, purple pigments, brown pigments, green pigments, blue pigments, gray pigments or red pigments, so that a coating prepared from the paint composition has a colorful appearance.

The white coloring material is at least one selected from Antimony white (Antimony white), Barium sulfate (Barium sulfate), Lithopone (Lithopone), Titanium white (Titanium white), and Zinc white (Zinc white).

The yellow pigment is Nickel antimony titanate (Nickel titanate antitony) and/or Chrome brown (Chrome titanate brown).

The orange pigment is Zinc-Tin Rutile (Rutile Tin Zinc).

The black pigment is selected from Copper chromium black spinel (Copper chromium black spinel), Titanium black (Titanium black), manganese dioxide (MnO)₂) At least one of Mars black, Ivory black, and Carbon black.

The purple colorant is Cobalt Phosphate (Cobalt Phosphate).

The brown pigment is titanium Manganese brown (mangase immunity brown) and/or zinc iron Chromium brown (Chromium iron zinc brown).

The Green colorant is at least one selected from Cobalt Green (Cobalt Green), Malachite (Malachite), and glauconite (Green earth).

The blue pigment is selected from at least one of celestite (Ultramarine), Cobalt blue (Cobalt blue), Egyptian blue (Egyptian blue), Han blue (Han blue), copper blue ore (Azurite), and yttrium indium manganese blue (YINM blue).

The grey pigment is Copper chromium black spinel (Copper chromium black spinel), Titanium black (Titanium black) and manganese dioxide (MnO)₂) A mixture of at least one of Mars black, ink violet, Ivory black, and Carbon black with at least one of Antimony white, Barium Sulfate, Lithopone, Titanium white, and Zinc white, and the mixture may further containAt least one of Burnt ochre (Burnt sienna), Indian Red (India Red), and Cobalt blue (Cobalt blue) is added.

The Red pigment is at least one selected from calcined loess (Burnt Sienna), Burnt Haematitum (Red ochre), and Indian Red (India Red).

The pigment of the technical scheme of the invention can reach the food contact safety level, so that after the pigment is added into the coating composition, the coating composition can also reach the food contact safety level.

It will be appreciated that the choice of colorants can be made to give the coating a better appearance according to the actual requirements.

In one embodiment of the present invention, the raw materials for preparing the coating composition include: polysiloxanes, polysilazanes, fluorine-modified antifouling agents, fillers, solvents, and catalysts. The preparation method comprises the following steps of preparing raw materials, wherein the polysiloxane and the polysilazane account for 10-80% of the raw materials by mass, the fluorine-modified antifouling agent accounts for 0.01-20% of the raw materials by mass, the filler accounts for 1-50% of the raw materials by mass, the solvent accounts for 10-66% of the raw materials by mass, and the catalyst accounts for 0.01-5% of the raw materials by mass.

In another embodiment of the present invention, the coating composition is prepared from the following raw materials: polysiloxanes, polysilazanes, fluorine-modified antifouling agents, fillers, solvents, and catalysts. The preparation method comprises the following steps of preparing raw materials, wherein the polysiloxane and the polysilazane account for 10-60% of the raw materials by mass, the fluorine-modified antifouling agent accounts for 0.01-15% of the raw materials by mass, the filler accounts for 1-50% of the raw materials by mass, the solvent accounts for 10-66% of the raw materials by mass, and the catalyst accounts for 0.01-5% of the raw materials by mass.

In another embodiment of the present invention, the coating composition is prepared from the following raw materials: polysiloxane, polysilazane, fluorine-modified antifouling agent, filler, solvent, coloring material and catalyst. The polysiloxane and the polysilazane account for 10-60% of the preparation raw materials by mass, the fluorine-modified antifouling agent accounts for 0.01-15% of the preparation raw materials by mass, the pigment accounts for 0.01-15% of the preparation raw materials by mass, the filler accounts for 1-50% of the preparation raw materials by mass, the solvent accounts for 10-66% of the preparation raw materials by mass, and the catalyst accounts for 0.01-5% of the preparation raw materials by mass.

In still another embodiment of the present invention, the coating composition is prepared from the following raw materials: polysiloxane, polysilazane, fluorine-modified antifouling agent, filler, solvent, coloring material and catalyst. The polysiloxane and the polysilazane account for 10-60% of the preparation raw materials by mass, the fluorine-modified antifouling agent accounts for 0.01-15% of the preparation raw materials by mass, the pigment accounts for 0.01-5% of the preparation raw materials by mass, the filler accounts for 1-50% of the preparation raw materials by mass, the solvent accounts for 10-66% of the preparation raw materials by mass, and the catalyst accounts for 0.01-5% of the preparation raw materials by mass.

adding a fluorine-modified stain-proofing agent to the polysilazane-polysiloxane copolymer, and stirring the fluorine-modified stain-proofing agent and the polysilazane-polysiloxane copolymer to uniformly mix them to prepare the coating composition.

In one embodiment of the present invention, the polysilazane is 7 to 96.99% by mass of the raw material, the polysiloxane is 3 to 73% by mass of the raw material, and the fluorine-modified antifouling agent is 0.01 to 20% by mass of the raw material.

In an embodiment of the present invention, the polysiloxane and the polysilazane may be placed in a reactor, and the polysiloxane and the polysilazane may be subjected to a first stirring treatment to uniformly mix the polysiloxane and the polysilazane, so that the polysiloxane and the polysilazane may undergo a copolymerization reaction to generate the polysiloxane-polysilazane copolymer.

In one embodiment of the present invention, the stirring rate of the first stirring treatment is 100 to 800 rpm, preferably 200 to 600 rpm, and more preferably 400 to 500 rpm.

It is understood that the time of the copolymerization reaction may be 10 seconds to 50 minutes, and the time of the copolymerization reaction may be adjusted according to the actual production needs.

It should be noted that the stirring rate of the first stirring treatment and the time of the copolymerization reaction may be other values, and the present invention is not limited thereto.

The preparation raw materials of the coating composition comprise polysilazane, polysiloxane and fluorine-modified antifouling agent, wherein the polysilazane accounts for 7-96.99% of the preparation raw materials by mass, the polysiloxane accounts for 3-73% of the preparation raw materials by mass, and the fluorine-modified antifouling agent accounts for 0.01-20% of the preparation raw materials by mass. The polysilazane and polysiloxane can generate copolymerization reaction to generate a polysilazane-polysiloxane copolymer, and the polysilazane-polysiloxane copolymer has the advantages of high hardness, good adhesion and good temperature resistance, so that a coating formed by the coating composition has the advantages of high hardness, good adhesion and good temperature resistance. The coating composition also contains a fluorine modified antifouling agent mixed with the polysilazane-polysiloxane copolymer, and the fluorine modified antifouling agent can ensure that a coating formed by the coating composition also has the advantage of easy cleaning. Because the polysilazane, the polysiloxane, the polysilazane-polysiloxane copolymer and the fluorine modified antifouling agent do not belong to toxic and harmful substances, the coating prepared from the coating composition has the advantage of reaching the food contact safety level.

After mixing the polysilazane and the polysiloxane, the method of preparing the coating composition further comprises: and adding a catalyst into the polysilazane and the polysiloxane, wherein the mass percentage of the catalyst in the preparation raw material is 0.01-5%, preferably 0.1-5%, more preferably 1-5%, and further preferably 2-3%.

The catalyst is an amine catalyst and/or a metal catalyst.

It will be appreciated that after the catalyst is added to the polysilazane and polysiloxane, a second agitation treatment is applied to the mixture to uniformly mix the polysilazane, polysiloxane and catalyst.

In an embodiment of the present invention, the stirring rate of the second stirring process may be 1000 to 2000 rpm, preferably 1200 to 1800 rpm, and more preferably 1500 to 1600 rpm.

In an embodiment of the present invention, the time of the second stirring treatment may be 10 seconds to 50 minutes, preferably 5 to 15 minutes, and more preferably 8 to 12 minutes.

It should be noted that the stirring rate of the second stirring treatment and the time of the second stirring treatment may also be other values, which is not limited in the present invention.

In the technical scheme of the invention, a catalyst can be added into polysilazane and polysiloxane to promote the copolymerization reaction of polysiloxane and polysilazane to generate the main body resin required by the invention, namely polysiloxane-polysilazane copolymer.

After forming the polysilazane-polysiloxane copolymer and before preparing the coating composition, the method of preparing the coating composition further comprises: a step of adding a solvent to the polysilazane-polysiloxane copolymer. The solvent accounts for 10-66% of the mass of the preparation raw materials, preferably 15-50%, more preferably 20-40%, and even more preferably 30-35%.

In the technical scheme of the invention, the polysilazane-polysiloxane copolymer and the fluorine-modified antifouling agent can be dissolved in a solvent, so that the coating composition can be easily coated on the surface of a substrate.

After forming the polysilazane-polysiloxane copolymer and before preparing the coating composition, the method of preparing the coating composition further comprises: a step of adding a filler to the polysilazane-polysiloxane copolymer.

The filler accounts for 1-50% of the preparation raw materials by mass, preferably 5-40%, preferably 10-30%, and more preferably 15-25%.

The filler can be at least one selected from silicon carbide, alumina, titanium oxide, zinc oxide, magnesium oxide, aluminum hydroxide, white carbon black, attapulgite, kaolin, bentonite, glass microspheres and ceramic microspheres.

In one embodiment of the present invention, after the solvent, the filler and the fluorine-modified anti-fouling agent are added to the polysilazane-polysiloxane copolymer, the mixture may be stirred for the third time to uniformly mix the polysilazane-polysiloxane copolymer, the solvent and the filler.

It will be appreciated that the polysilazane-polysiloxane copolymer may be first treated by adding a solvent, a fluorine-modified anti-fouling agent and a fluorine-modified anti-fouling agent, and then adding a filler and a colorant, followed by stirring for the third time. The polysilazane-polysiloxane copolymer may be simultaneously added with a solvent, a coloring material, a filler and a fluorine-modified antifouling agent, and subjected to a third stirring treatment. The solvent can be added into the polysilazane-polysiloxane copolymer, then the filler, the pigment and the fluorine modified antifouling agent are added, and the stirring treatment is carried out for the third time.

The stirring speed of the third stirring treatment can be 100-3000 r/min, preferably 500-2000 r/min, and more preferably 1000-1500 r/min.

In an embodiment of the invention, the time of the third stirring treatment may be 2 to 20 minutes, preferably 5 to 15 minutes, and more preferably 8 to 12 minutes.

It should be noted that the stirring rate of the third stirring treatment and the time of the third stirring treatment may also be other values, which is not limited in the present invention.

In another embodiment of the method, the particle size of the filler is in a range of 0.2-0.5 microns to obtain a smoother coating.

In one embodiment of the present invention, the filler may be ground by a grinder to reduce the particle size of the filler, and the ground filler may be added to the polysilazane-polysiloxane copolymer.

In another embodiment of the present invention, the filler with larger particle size can be directly added to the polysilazane-polysiloxane copolymer, and then the coating composition is subjected to grinding treatment to reduce the particle size of the filler in the coating composition.

The time of the grinding treatment can be 30 to 60 minutes, and preferably 40 to 50 minutes. The grinding time can be adjusted according to actual requirements to obtain the filler with corresponding particle size.

After forming the polysilazane-polysiloxane copolymer and before preparing the coating composition, the method of preparing the coating composition further comprises: a step of adding a colorant to the polysilazane-polysiloxane copolymer. The pigment accounts for 0.01-15% of the preparation raw materials by mass, 1-15% of the preparation raw materials by mass, more preferably 5-15% of the preparation raw materials by mass, and even more preferably 10-15% of the preparation raw materials by mass.

According to the technical scheme of the invention, after the pigment is added into the polysilazane-polysiloxane copolymer, the coating prepared from the coating composition has a colorful appearance.

It should be noted that, in the preparation method of the coating composition, the adding sequence and grinding mode of each component can be adjusted and selected according to actual requirements, and the time, stirring speed, stirring time, grinding time and the like of the copolymerization reaction are only typical values in the preparation process and can be adjusted according to actual requirements.

It will be appreciated that the coating composition may be ground to reduce the particle size of the components of the coating composition.

It will be appreciated that the coating composition may be applied to a substrate surface to form the coating.

It can be understood that the coating layer prepared from the coating composition has a thermal weight loss of less than 5% in an oxygen environment at 500 ℃, indicating that the coating layer has very excellent heat resistance.

Please refer to the above embodiments for components, proportions, preparation methods, etc. of the coating composition, since the coating member adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.

The thickness of the coating ranges from 1 micron to 100 microns, preferably ranges from 5 microns to 60 microns, more preferably ranges from 10 microns to 50 microns, and further preferably ranges from 20 microns to 30 microns.

It will be appreciated that the thickness of the coating can be adjusted to the actual requirements.

The coating may have a thickness of 1 micron, 2 microns, 5 microns, 10 microns, 20 microns, 50 microns, or 100 microns.

According to the technical scheme, the thickness of the coating can be 1-100 micrometers, and after the coating with the thickness is formed on the surface of the substrate, the coating can effectively protect the substrate, so that the coated part has the advantages of high hardness, high temperature resistance, easiness in cleaning, good adhesion, capability of reaching the food contact safety level and the like.

providing a substrate and the coating composition;

It will be appreciated that the coating composition may be first ground to reduce agglomeration and then the ground coating composition may be applied to the surface of the substrate.

It can be understood that when the coating composition is applied to the surface of a substrate, the substrate is subjected to a heating treatment at a temperature of less than 300 ℃, preferably 100 ℃ to 280 ℃, and more preferably 120 ℃ to 150 ℃, so that the coating composition on the surface of the substrate is cured to form a coating. The thickness of the coating can range from 1 to 100 microns.

In an embodiment of the present invention, the substrate may be pretreated by degreasing, cleaning, and drying, so as to clean the substrate surface and improve the adhesion of the coating on the substrate surface.

According to the technical scheme, the coating composition can be directly coated on the surface of the substrate, and the coated piece can be prepared after the coating composition is cured, so that the preparation method of the coated piece has the advantage of simple forming process. And the temperature of the curing treatment is lower than 300 ℃, compared with the technical scheme of high-temperature curing in the prior art, the preparation method of the coating piece also has the advantage of low energy consumption.

It can be understood that the coating has better adhesiveness, so that pretreatment such as sanding and the like on the substrate is not needed, the process difficulty of the preparation method of the coating is reduced, and compared with the technical scheme that sanding treatment needs to be carried out on the substrate in the prior art, the preparation method of the coating has the advantage of environmental protection.

The household appliance can be a microwave oven, an induction cooker, an oven, a bread maker, a noodle maker, a smoke exhaust ventilator, an air explosion fryer, a cake grade, a humidifier, an electric kettle, an electric hair drier, a juice extractor, a pressure cooker, an electric rice cooker, a water heater, a computer, an electric fan, an electric frying pan, a soybean milk maker, an air conditioner, a sound box, a cooking range, a refrigerator or the like.

In an embodiment of the present invention, the coating member may be a housing of a home appliance. In particular, the coating member may be an outer or inner shell of a household appliance.

In a specific embodiment of the present invention, when the household appliance is a heating appliance such as a microwave oven, an air fryer or a toaster, the coating member may be an inner cavity of the microwave oven or the toaster or a heating plate.

The specific structure of the household appliance refers to the above embodiments, and since the household appliance adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.

It is understood that the raw materials for preparing the coating composition are not substances which are restricted or prohibited by domestic and foreign laws and regulations, and harmful substances are not generated in the preparation process of the coating composition and the preparation process of the coated piece, so that the coating composition, the coating layer, the coated piece and the electronic device have the advantages of safety and environmental protection.

The following are several examples of the preparation of the coating composition of the present invention:

example 1

The preparation method of the coating composition comprises the following steps:

providing a preparation raw material, wherein the preparation raw material comprises:

polysilazanes, theR of polysilazanes₁Is hydrogen radical, R₂Is hydrogen radical, R₃Is hydrogen radical, the polysilazane accounts for 40 percent of the mass range of the preparation raw material,

polysiloxanes, R of said polysiloxanes₄Is hydrogen radical, R₅The polysiloxane accounts for 40 percent of the mass of the preparation raw material;

perfluoro-n-pentane, which accounts for 20 percent of the mass of the preparation raw material.

Placing polysilazane and polysiloxane into a reactor, mixing polysilazane and polysiloxane at the speed of 350 r/min, and carrying out copolymerization reaction between polysiloxane and polysilazane to generate polysiloxane-polysilazane copolymer; and

perfluoro-n-pentane was added to the polysiloxane-polysilazane copolymer, and stirring was performed at 2000 rpm to obtain a coating composition.

Example 2

polysilazanes, R of said polysilazanes₁Is aryl, R₂Is hydrogen radical, R₃Is alkylamino radical, the polysilazane accounts for 35 percent of the mass of the preparation raw material,

polysiloxanes, R of said polysiloxanes₄Is cycloalkane, R₅The polysiloxane is alkyl siloxane, and accounts for 20 percent of the mass of the preparation raw material;

2H-perfluoro-5, 8, 11, 14, 17-pentamethyl-3, 6, 9, 12, 15, 18-hexaoxaheneicosane, which accounts for 12 percent of the mass of the preparation raw material;

dibutyl ether, which accounts for 20% of the mass percentage of the preparation raw material;

and the cyclohexanone accounts for 13 percent of the mass of the preparation raw material.

Placing polysilazane and polysiloxane into a reactor, mixing polysilazane and polysiloxane at the speed of 550 revolutions per minute, and carrying out copolymerization reaction between polysiloxane and polysilazane to generate polysiloxane-polysilazane copolymer; and

adding dibutyl ether, cyclohexanone and 2H-perfluoro-5, 8, 11, 14, 17-pentamethyl-3, 6, 9, 12, 15, 18-hexaoxaheneicosane into the polysiloxane-polysilazane copolymer, and stirring at the speed of 2000 revolutions per minute to obtain the coating composition.

Example 3

polysilazanes, R of said polysilazanes₁Is an alkene, R₂Is an alkylsiloxane, R₃Is alkane, the polysilazane accounts for 33 percent of the mass range of the preparation raw material,

polysiloxanes, R of said polysiloxanes₄Is an alkane, R₅Is alkene, and the polysiloxane accounts for 17 percent of the mass of the preparation raw material;

1, 1, 1, 2, 2, 3, 4, 5, 5, 6, 6, 6-dodecafluoro-3, 4-di (trifluoromethyl) hexane, which accounts for the range of 13% by mass of the preparation raw material;

toluene, which accounts for 10% of the mass of the preparation raw material;

isophorone, which accounts for 4% of the mass percentage of the preparation raw material;

the mass percentage of the alumina in the preparation raw material is 10%, and the particle size of the alumina is 2.6-3.3 microns;

the silicon carbide accounts for 10% of the mass percentage of the preparation raw materials, and the particle size of the silicon carbide ranges from 2.5 microns to 3.6 microns;

and the dimethyl tin accounts for 3 percent of the mass of the preparation raw material.

Placing the polysilazane and the polysiloxane in a reactor, and mixing the polysilazane and the polysiloxane at a speed of 350 revolutions per minute;

adding dimethyl tin into the polysiloxane and the polysilazane, and stirring at 1900 r/min, wherein the dimethyl tin can promote the copolymerization reaction between the polysiloxane and the polysilazane to generate a polysiloxane-polysilazane copolymer;

adding toluene, isophorone and 1, 1, 1, 2, 2, 3, 4, 5, 5, 6, 6, 6-dodecafluoro-3, 4-di (trifluoromethyl) hexane into the polysiloxane-polysilazane copolymer, then adding alumina and silicon carbide, and stirring at 2800 revolutions per minute to obtain a coating primary product; and

and grinding the primary coating product to enable the particle size of the aluminum oxide and the silicon carbide to be in the range of 0.21-0.45 micrometer, and thus obtaining the coating composition.

Example 4

polysilazanes, R of said polysilazanes₁Is hydrogen radical, R₂Is cycloalkane, R₃Is hydrogen radical, the polysilazane accounts for 30 percent of the mass range of the preparation raw material,

polysiloxanes, R of said polysiloxanes₄Is alkylamino, R₅Is alkoxy, and the polysiloxane accounts for 15 percent of the mass of the preparation raw material;

1, 1, 1, 2, 2, 3, 3, 4, 5, 5, 6, 6, 6-tridecafluorohexane which accounts for 15 percent of the mass of the preparation raw material;

ortho-xylene, which accounts for 9% of the mass percentage of the preparation raw material;

petroleum ether, which accounts for 3% of the mass of the preparation raw material;

the mass percentage of the alumina in the preparation raw material is 11%, and the particle size of the alumina is 2.1-3 micrometers;

the white carbon black accounts for 15% of the mass percentage of the preparation raw materials, and the particle size of the white carbon black ranges from 2.2 microns to 3 microns;

and the palladium acetate salt accounts for 2 percent of the mass of the preparation raw material.

Placing the polysilazane and the polysiloxane in a reactor, and mixing the polysilazane and the polysiloxane at a speed of 660 revolutions per minute;

adding palladium acetate salt into the polysiloxane and the polysilazane, and stirring at the speed of 1300 r/min, wherein the palladium acetate salt can promote the copolymerization reaction between the polysiloxane and the polysilazane to generate a polysiloxane-polysilazane copolymer;

adding o-xylene, petroleum ether and 1, 1, 1, 2, 2, 3, 3, 4, 5, 5, 6, 6, 6-tridecafluorohexane into the polysiloxane-polysilazane copolymer, then adding alumina and white carbon black, and stirring at the speed of 1600 revolutions per minute to obtain a primary coating product;

and grinding the primary coating product to enable the particle size of the alumina and the white carbon black to be 0.21-0.35 micron, thereby obtaining the coating composition.

Example 5

polysilazanes, R of said polysilazanes₁Is alkylamino, R₂Is alkyl, R₃Is aryl, the polysilazane accounts for 28 percent of the mass of the preparation raw material,

polysiloxanes, R of said polysiloxanes₄Is an alkylsiloxane, R₅Is cyclane, and the polysiloxane accounts for 12 percent of the mass of the preparation raw material;

perfluoro-1-butanesulfonic acid, which accounts for 11% of the mass percentage of the preparation raw material;

n-hexane accounting for 13% of the mass of the preparation raw material;

acetone, which accounts for 12% of the mass of the preparation raw material;

the attapulgite accounts for 4% of the mass percentage of the preparation raw materials, and the particle size of the attapulgite ranges from 2.5 microns to 3 microns;

white carbon black accounting for 4% of the mass percentage of the preparation raw materials, wherein the particle size of the white carbon black is 2-3.2 microns;

the magnesium oxide accounts for 14% of the mass percentage of the preparation raw materials, and the particle size of the magnesium oxide ranges from 0.2 to 0.25 microns;

triethylene tetramine, which accounts for 2% of the mass percentage of the preparation raw materials.

Placing the polysilazane and the polysiloxane in a reactor, and mixing the polysilazane and the polysiloxane at a speed of 750 revolutions per minute;

adding triethylene tetramine into the polysiloxane and the polysilazane, and stirring at the speed of 1400 rpm, wherein the triethylene tetramine can promote the copolymerization reaction between the polysiloxane and the polysilazane to generate a polysiloxane-polysilazane copolymer;

adding n-hexane, acetone and perfluoro-1-butanesulfonic acid into the polysiloxane-polysilazane copolymer, then adding attapulgite, white carbon black and magnesium oxide, and stirring at the speed of 2300 revolutions per minute to obtain a primary coating product; and

and grinding the primary coating product to enable the particle size of the attapulgite and the white carbon black to be 0.2-0.25 micron, thereby obtaining the coating composition.

Example 6

polysilazanes, R of said polysilazanes₁Is aryl, R₂Is aryl, R₃Is hydrogen radical, the polysilazane accounts for 25 percent of the mass range of the preparation raw material,

polysiloxanes, R of said polysiloxanes₄Is an alkene, R₅The polysiloxane is hydrogen radical, and the mass percentage of the polysiloxane in the preparation raw material is 10 percent；

Perfluoro-1, 2-dimethylcyclohexane, which accounts for 9 percent of the mass of the preparation raw material;

methyl ethyl ketone, which accounts for 11% of the mass percentage of the preparation raw material;

the m-xylene accounts for 7 percent of the mass of the preparation raw material;

the mass percentage of the alumina in the preparation raw material is 30%, and the particle size of the alumina is 0.24-0.33 microns; titanium oxide, which accounts for 3% of the mass of the preparation raw material, wherein the particle size of the titanium oxide is 0.21-0.32 microns;

the bentonite accounts for 3% of the mass percentage of the preparation raw materials, and the particle size of the bentonite is 0.25-0.35 microns;

and the triphenyl tin accounts for 2 percent of the mass of the preparation raw material.

adding triphenyl tin into the polysiloxane and the polysilazane, and stirring at the speed of 1100 r/min, wherein the triphenyl tin can promote the copolymerization reaction between the polysiloxane and the polysilazane to generate a polysiloxane-polysilazane copolymer; and

after methyl ethyl ketone, m-xylene, and perfluoro-1, 2-dimethylcyclohexane were added to the polysiloxane-polysilazane copolymer, alumina, titanium oxide, and bentonite were added thereto, and the mixture was stirred at 2300 rpm to obtain a coating composition.

Example 7

polysilazanes, R of said polysilazanes₁Is an alkane, R₂Is an alkane, R₃Is hydrogen radical, the polysilazane accounts for 23 percent of the mass range of the preparation raw material,

polysiloxanes, R of said polysiloxanes₄Is alkoxy, R₅Is alkoxy, and the polysiloxane accounts for 7 percent of the mass of the preparation raw material;

perfluoro-2, 7-dimethyloctane which accounts for 7 percent of the mass of the preparation raw material;

toluene, which accounts for 36% of the mass of the preparation raw material;

the mass percentage of the alumina in the preparation raw material is 17%, and the particle size of the alumina is 2.5-3 microns;

zinc oxide, which accounts for 5% of the mass of the preparation raw material, wherein the particle size of the zinc oxide is 2-3 microns;

the ceramic microspheres account for 3% of the mass percentage of the preparation raw materials, and the particle size of the ceramic microspheres ranges from 0.2 microns to 0.3 microns;

Placing polysilazane and polysiloxane in a reactor, and mixing polysilazane and polysiloxane at a speed of 100 revolutions per minute;

adding palladium acetate salt into the polysiloxane and the polysilazane, and stirring at the speed of 1800 rpm, wherein the palladium acetate salt can promote the copolymerization reaction between the polysiloxane and the polysilazane to generate a polysiloxane-polysilazane copolymer;

adding toluene and perfluoro-2, 7-dimethyloctane into the polysiloxane-polysilazane copolymer, then adding aluminum oxide and zinc oxide, and stirring at the speed of 2700 revolutions per minute to obtain a coating primary product; and

and grinding the primary coating product to enable the particle size of the aluminum oxide and the zinc oxide to be 0.2-0.25 micrometer, and adding ceramic microspheres to obtain the coating composition.

Example 8

polysilazanes, R of said polysilazanes₁Is an alkene, R₂Is aryl, R₃Is hydrogen radical, the polysilazane accounts for 20 percent of the mass range of the preparation raw material,

polysiloxanes, R of said polysiloxanes₄Is an alkane, R₅Is alkane, and the polysiloxane accounts for 5 percent of the mass of the preparation raw material;

perfluoro- (1, 3, 5-trimethylbenzene) accounting for 5 percent of the mass of the preparation raw material;

diethyl ether accounting for 25 percent of the mass of the preparation raw material;

p-xylene, which accounts for 20% of the mass percentage of the preparation raw material;

white carbon black accounting for 10% of the mass percentage of the preparation raw materials, wherein the particle size of the white carbon black ranges from 2.5 microns to 3 microns;

the aluminum hydroxide accounts for 12% of the mass percentage of the preparation raw materials, and the particle size of the aluminum hydroxide ranges from 2 microns to 3 microns;

the glass microspheres account for 2% of the mass percentage of the preparation raw materials, and the particle size of the glass microspheres ranges from 0.2 microns to 0.3 microns;

and N, N-dimethylaniline accounting for 1 percent of the mass of the preparation raw materials.

Placing the polysilazane and the polysiloxane in a reactor, and mixing the polysilazane and the polysiloxane at a speed of 550 revolutions per minute;

adding N, N-dimethylaniline into the polysiloxane and the polysilazane, and stirring at the speed of 1600 revolutions per minute, wherein the N, N-dimethylaniline can promote the copolymerization reaction between the polysiloxane and the polysilazane to generate a polysiloxane-polysilazane copolymer;

adding diethyl ether, p-xylene and perfluoro- (1, 3, 5-trimethylbenzene) into the polysiloxane-polysilazane copolymer, then adding white carbon black and aluminum hydroxide, and stirring at the speed of 2200 revolutions per minute to obtain a primary coating product;

and grinding the primary coating product to enable the particle size range of the white carbon black and the aluminum hydroxide to be 0.2-0.25 micron, and adding glass microspheres to obtain the coating composition.

Example 9

polysilazanes, R of said polysilazanes₁Is hydrogen radical, R₂Is hydrogen radical, R₃Is hydrogen radical, the polysilazane accounts for 30 percent of the mass range of the preparation raw material,

polysiloxanes, R of said polysiloxanes₄Is hydrogen radical, R₅The polysiloxane accounts for 30 percent of the mass of the preparation raw material;

perfluorotetraethylene glycol dimethyl ether, which accounts for 10% of the mass of the preparation raw material;

dibutyl ether, which accounts for 27% of the mass percentage of the preparation raw material;

triethylene diamine in a range of 3% by mass of the starting material.

Placing the polysilazane and the polysiloxane in a reactor, and mixing the polysilazane and the polysiloxane at a speed of 250 revolutions per minute;

adding triethylenediamine into the polysiloxane and the polysilazane, and stirring at 1700 rpm, wherein the triethylenediamine can promote the copolymerization reaction between the polysiloxane and the polysilazane to generate a polysiloxane-polysilazane copolymer;

dibutyl ether and perfluorotetraethylene glycol dimethyl ether were added to the polysiloxane-polysilazane copolymer, and stirring was performed at a speed of 2700 revolutions per minute to obtain a coating composition.

Example 10

polysilazanes, R of said polysilazanes₁Is hydrogen radical, R₂Is hydrogen radical, R₃Is hydrogen radical, the polysilazane accounts for 40 percent of the mass range of the preparation raw material,

polysiloxanes, R of said polysiloxanes₄Is hydrogen radical, R₅The polysiloxane accounts for 20 percent of the mass of the preparation raw material;

triethylene diamine in a range of 3% by mass of the starting material.

Placing the polysilazane and the polysiloxane in a reactor, and mixing the polysilazane and the polysiloxane at a speed of 120 revolutions per minute;

adding triethylenediamine into the polysiloxane and the polysilazane, and stirring at 1400 revolutions per minute, wherein the triethylenediamine can promote the copolymerization reaction between the polysiloxane and the polysilazane to generate a polysiloxane-polysilazane copolymer; and

dibutyl ether and perfluorotetraglyme were added to the polysiloxane-polysilazane copolymer, and stirring was performed at a speed of 2100 rpm to obtain a coating composition.

Example 11

polysilazanes, R of said polysilazanes₁Is hydrogen radical, R₂Is hydrogen radical, R₃Is hydrogen radical, the polysilazane accounts for 20 percent of the mass range of the preparation raw material,

polysiloxanes, R of said polysiloxanes₄Is hydrogen radical, R₅The polysiloxane accounts for the mass percentage of the preparation raw material and is in the range of40％；

triethylene diamine in a range of 3% by mass of the starting material.

Placing the polysilazane and the polysiloxane in a reactor, and mixing the polysilazane and the polysiloxane at a speed of 180 revolutions per minute;

adding triethylenediamine into the polysiloxane and the polysilazane, and stirring at 1400 revolutions per minute, wherein the triethylenediamine can promote the copolymerization reaction between the polysiloxane and the polysilazane to generate a polysiloxane-polysilazane copolymer;

adding dibutyl ether and perfluorotetraglyme to the polysiloxane-polysilazane copolymer, and stirring at 2400 rpm to obtain a coating composition.

Example 12

dibutyl ether, which accounts for 22% of the mass percentage of the preparation raw material;

the silicon carbide accounts for 5% of the mass percentage of the preparation raw materials, and the particle size of the silicon carbide ranges from 2.5 microns to 3 microns;

triethylene diamine in a range of 3% by mass of the starting material.

Placing the polysilazane and the polysiloxane in a reactor, and mixing the polysilazane and the polysiloxane at a speed of 300 revolutions per minute;

adding triethylenediamine into the polysiloxane and the polysilazane, and stirring at the speed of 1300 r/min, wherein the triethylenediamine can promote the copolymerization reaction between the polysiloxane and the polysilazane to generate a polysiloxane-polysilazane copolymer;

adding dibutyl ether and perfluorotetraethylene glycol dimethyl ether into the polysiloxane-polysilazane copolymer, then adding silicon carbide, and stirring at the speed of 2600 revolutions per minute to obtain a primary coating product; and

and grinding the primary coating product to enable the particle size of the silicon carbide to be 0.5-0.75 microns, and thus obtaining the coating composition.

Example 13

the mass percentage of the alumina in the preparation raw material is 5%, and the particle size of the alumina is 0.25-0.33 microns;

triethylene diamine in a range of 3% by mass of the starting material.

Placing the polysilazane and the polysiloxane in a reactor, and mixing the polysilazane and the polysiloxane at a speed of 900 revolutions per minute;

adding triethylenediamine into the polysiloxane and the polysilazane, and stirring at the speed of 1200 revolutions per minute, wherein the triethylenediamine can promote the copolymerization reaction between the polysiloxane and the polysilazane to generate a polysiloxane-polysilazane copolymer;

adding dibutyl ether and perfluorotetraglycol dimethyl ether into the polysiloxane-polysilazane copolymer, adding aluminum oxide, and stirring at the speed of 2500 rpm to obtain the coating composition.

Example 14

the silicon carbide accounts for 5% of the mass percentage of the preparation raw materials, and the particle size of the silicon carbide ranges from 2 microns to 3 microns; and

Placing the polysilazane and the polysiloxane in a reactor, and mixing the polysilazane and the polysiloxane at a speed of 200 revolutions per minute;

adding dimethyl tin into the polysiloxane and the polysilazane, and stirring at the speed of 1100 revolutions per minute, wherein the dimethyl tin can promote the copolymerization reaction between the polysiloxane and the polysilazane to generate a polysiloxane-polysilazane copolymer;

adding dibutyl ether and perfluorotetraethylene glycol dimethyl ether into the polysiloxane-polysilazane copolymer, then adding silicon carbide, and stirring at the speed of 2500 rpm to prepare a primary coating product;

and grinding the primary coating product to enable the particle size of the silicon carbide to be 0.8-0.9 microns, and thus obtaining the coating composition.

Example 15

polysilazanes, R of said polysilazanes₁Is hydrogen radical, R₂Is hydrogen radical, R₃Is hydrogen radical, the polysilazane accounts for 17 percent of the mass range of the preparation raw material,

polysiloxanes, R of said polysiloxanes₄Is hydrogen radical, R₅The polysiloxane accounts for 3 percent of the mass of the preparation raw material;

3- (2-perfluorohexylethoxy) -1, 2-epoxypropane, wherein the mass percentage of the 3- (2-perfluorohexylethoxy) -1, 2-epoxypropane accounts for 3% of the weight of the preparation raw material;

p-xylene, which accounts for 51% of the mass percentage of the preparation raw material;

silicon carbide, which accounts for 25% of the mass of the preparation raw material, wherein the particle size of the silicon carbide ranges from 0.2 to 0.3 microns;

triethylene diamine in a range of 1% by mass of the starting material.

adding triethylenediamine into the polysiloxane and the polysilazane, and stirring at 1600 revolutions per minute, wherein the triethylenediamine can promote the copolymerization reaction between the polysiloxane and the polysilazane to generate a polysiloxane-polysilazane copolymer;

after p-xylene was added to the polysiloxane-polysilazane copolymer, 3- (2-perfluorohexylethoxy) -1, 2-epoxypropane and silicon carbide were further added, and the mixture was stirred at 2600 rpm to prepare a coating composition.

Example 16

polysilazanes, R of said polysilazanes₁Is hydrogen radical, R₂Is an alkane, R₃Is hydrogen radical, the polysilazane accounts for 12 percent of the mass of the preparation raw material,

polysiloxanes, R of said polysiloxanes₄Is alkylamino, R₅The polysiloxane accounts for 3 percent of the mass of the preparation raw material;

p-xylene, which accounts for 56% of the mass percentage of the preparation raw material;

silicon carbide, which accounts for 25% of the mass of the preparation raw material, wherein the particle size of the silicon carbide ranges from 1 micron to 2 microns;

triethylene diamine in a range of 1% by mass of the starting material.

Placing the polysilazane and the polysiloxane in a reactor, and mixing the polysilazane and the polysiloxane at a speed of 400 revolutions per minute;

adding triethylene diamine into the polysiloxane and the polysilazane, and stirring at the speed of 1800 rpm, wherein the triethylene diamine can promote the copolymerization reaction between the polysiloxane and the polysilazane to generate a polysiloxane-polysilazane copolymer;

adding p-xylene and 3- (2-perfluorohexylethoxy) -1, 2-epoxypropane into the polysiloxane-polysilazane copolymer, then adding silicon carbide, and stirring at the speed of 3000 r/min to prepare a primary coating product;

and grinding the primary coating product to enable the particle size of the silicon carbide to reach 0.21-0.32 micron, so as to obtain the coating composition.

Example 17

polysilazanes, R of said polysilazanes₁Is hydrogen radical, R₂Is an alkane, R₃Is hydrogen radical, the polysilazane accounts for 7 percent of the mass range of the preparation raw material,

p-xylene, which accounts for 61% of the mass of the preparation raw material;

triethylene diamine in a range of 1% by mass of the starting material.

Placing the polysilazane and the polysiloxane in a reactor, and mixing the polysilazane and the polysiloxane at a speed of 450 revolutions per minute;

adding triethylenediamine into the polysiloxane and the polysilazane, and stirring at the speed of 2000 r/min, wherein the triethylenediamine can promote the copolymerization reaction between the polysiloxane and the polysilazane to generate a polysiloxane-polysilazane copolymer;

and grinding the primary coating product to enable the particle size of the silicon carbide to reach 0.2-0.3 micron, so as to obtain the coating composition.

The coating compositions prepared in the above examples 1 to 17 were applied to a substrate to form a coating layer, and samples, which may be designated as sample 1 and sample 2.. the sample 17, were obtained, and the hardness, adhesion temperature resistance, and water contact angle of the coating layer of the samples 1 to 17 were tested, and the test results are shown in table 1.

Table 1 physical property test results of the coating layer

	Hardness (H)	Attachment of	Temperature resistance (weight loss%)	Water contact Angle (°)
					Sample 1	8	0	1.84	115
Sample 2	9	0	1.30	117
					Sample 3	8	0	1.38	119
Sample No. 4	8	0	1.63	120
					Sample No. 5	8	0	1.57	119
Sample No. 6	7	0	2.05	107
					Sample 7	7	0	2.07	108
Sample 8	7	0	2.23	106
					Sample 9	8	0	1.85	115
Sample 10	9	0	1.19	116
					Sample 11	8	0	1.74	114
Sample 12	9	0	1.13	120
					Sample 13	9	0	1.13	118
Sample 14	9	0	1.18	118
					Sample 15	7	0	1.23	98
Sample 16	6	0	1.26	98
					Sample 17	6	0	1.10	98

The hardness of the samples 1-17 is tested according to GB/T6739-.

The adhesion of samples 1-17 was tested according to GB/T9286 (adhesion test method), which shows that the hundred lattice adhesion of samples 1-17 can reach 0 grade, indicating that the adhesion of samples 1-17 is also better.

The weight loss of samples 1-17 was tested according to GB/T9286 (temperature resistance test method) and showed that samples 1-17 also had better temperature resistance.

And (3) testing the water contact angles of the samples 1-17 by adopting a shape image analysis method, wherein the water contact angles of the samples 1-17 are more than 90 degrees, which shows that the samples 1-17 have the advantage of easy cleaning.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which can be directly or indirectly applied to other related technical fields without departing from the spirit of the present invention, are included in the scope of the present invention.

Claims

1. A coating composition, characterized in that the raw materials for preparing the coating composition comprise polysilazane, polysiloxane, fluorine modified antifouling agent and catalyst, the polysilazane and polysiloxane generate copolymerization reaction to generate polysilazane-polysiloxane copolymer, and the fluorine modified antifouling agent is mixed with the polysilazane-polysiloxane copolymer; the polysilazane accounts for 10-80% of the mass of the preparation raw material, the polysiloxane accounts for 10-60% of the mass of the preparation raw material, and the fluorine-modified antifouling agent accounts for 1-20% of the mass of the preparation raw material; the catalyst is an amine catalyst and/or a metal catalyst;

the structural formula of the polysilazane is as follows:

wherein R is₁Is hydrogen radical, alkane, alkene, aryl, alkoxy, alkyl siloxy or alkylamino radical, R₂Is hydrogen radical, alkane, alkene, aryl, alkoxy, alkyl siloxy or alkylamino radical, R₃Is hydrogen, alkane, alkene, aryl, alkoxy, alkyl siloxane, or alkyl amine;

the molecular weight of the polysilazane is 100-1000;

the polysiloxane has the structural formula:

wherein R is₄Is hydrogen radical, alkane, alkene, aryl, alkoxy or alkyl siloxy, R₅Is hydrogen, alkane, alkene, aryl, alkoxy or alkyl siloxy;

the amine catalyst is selected from one or more of aliphatic amine, alicyclic amine, alcohol amine and aromatic amine, and the aliphatic amine is selected from at least one of diethylamine, triethylamine and triethylene tetramine; the alicyclic amine is at least one selected from triethylene diamine, piperazine, piperidine and morpholine; the alcohol amine is at least one selected from N, N-dimethylethanolamine, diisopropanolamine and N, N-diethylethanolamine; the aromatic amine is selected from at least one of aniline, o-phenylenediamine, benzidine and N, N-dimethylaniline;

the metal catalyst is an organic tin catalyst and/or a palladium catalyst, and the organic tin catalyst is at least one selected from dibutyltin dilaurate, stannous octoate, dimethyl tin and triphenyl tin; the palladium catalyst is at least one selected from carbon/palladium, palladium chloride, palladium propionate salt, palladium acetate salt and palladium triphenylphosphine;

the raw materials for preparing the coating composition also comprise a catalyst and a filler, wherein the catalyst accounts for 0.01-5% of the coating composition by mass, and the filler accounts for 1-50% of the coating composition by mass.

2. The coating composition of claim 1 wherein the fluorine-modified antifoulant is selected from the group consisting of methyl perfluoroamyl ketone, 1-methyl-3-trifluoromethyl-2-pyrrolidone, 1H-perfluoro-1-tetradecanol, 1-fluoroheptane, tridecafluorohexane-1-sulfonic acid potassium salt, perfluoro-n-pentane, [ (4-fluorophenoxy) methyl ] oxirane, 2H-perfluoro-5, 8, 11, 14, 17-pentamethyl-3, 6, 9, 12, 15, 18-hexaoxaheneicosane, 2- (trifluoromethyl) -3-ethoxydodecafluorohexane, decafluoro-4- (pentafluoroethyl) oxiranesulfonic acid potassium salt, 1, 1, 2, 2, 3, 4, 5, 5, 6, 6, 6-dodecafluoro-3, 4-bis (trifluoromethyl) hexane, perfluoroeicosane, 1H, 6H-perfluorohexane, 1, 7-difluoroheptane, 1, 1, 1, 2, 2, 3, 3, 4, 5, 5, 6, 6, 6-tridecafluorohexane, 1, 1, 2, 2, 5, 5, 6, 6-octafluorohexane, perfluoro-p-menthane, heptafluoropropane, perfluoroheptane, perfluoro (methyldecahydronaphthalene), perfluoropolyether, perfluoro-1-butanesulfonic acid, perfluoropentane, perfluoro (methylcyclohexane), perfluoro (2, 2, 3, 3-tetramethylbutane), perfluoro-1-octane, perfluorohexane, N-perfluoro-N-decane, perfluoro-1, 2-dimethylcyclohexane, perfluoropentadecane, perfluorononane, Perfluoron-butane, perfluorododecane, perfluorotetradecane, perfluoro-2, 7-dimethyloctane, perfluorohexadecane, perfluoro-2, 3, 5, 6-tetramethylcyclohexane, perfluorotridecane, perfluoromethylcyclopentane, perfluorodimethylcyclobutane, (perfluorohexyl) benzene, perfluoro- (1, 3, 5-trimethylbenzene), perfluorobutylethane, perfluorobutylether, perfluorotetracosane, perfluorohexylethane, perfluorotetraethylene glycol dimethyl ether, perfluoro-2-methylbutane, perfluoro-p-menthane, perfluorooctylethane, 3- (perfluorohexyl) propylene oxide, 3- (2-perfluorohexylethoxy) -1, 2-propylene oxide, 3- (perfluoron-butane) -1, 2-propylene oxide, perfluorohexylethoxy) -1, 2-propylene oxide, 3- (perfluoro-n-octane) -1, 2-epoxypropane, 1H-perfluoro-1-tetradecane, 2H-perfluoro-15-methyl-3, 6-dioxanonane, 3- (perfluoro-5-methylhexyl) -1, 2-epoxypropane, 1H-perfluoropentane, 1- (perfluoro-n-hexyl) dodecane, 1- (perfluoro-n-octyl) tetradecane, 1H, 6H-perfluorohexane, 1- (perfluoro-n-hexyl) decane, 1H-perfluoro-2, 4, 4, -trimethylpentane, 1H, 10H-perfluorodecane, 1H-perfluoro-2, 6-dimethylheptane, 1-methyl-4- (perfluoroethyl) toluene, 1H-perfluoro-2, 6-dimethylheptane, 1H-methyl-4- (perfluoroethyl) toluene, 1H-perfluoro-n-hexyl) decane, 1H-n-methyl-3, 6, 2H-perfluoro (2-methylpentane), ethyl perfluorobutyl ether, 8-perfluorodecyl octane, perfluoroisobutane, perfluorobutyl methyl ether, perfluoropropylene oxide, 2-trifluoromethylperfluoropentane, and 2H-3H-perfluoropentane.

3. The coating composition of claim 1, wherein R is₁And R₂At least one of which is a hydrogen radical or an alkene.

4. The coating composition according to claim 1 or 2, wherein the raw material for preparing the coating composition further comprises a solvent, the solvent accounts for 10-66% of the coating composition by mass, and the solvent is at least one selected from alkane solvents, ether solvents, ketone solvents, and benzene derivative solvents.

5. The coating composition of claim 4, wherein the alkane solvent is selected from at least one or more of n-hexane, n-octane, n-decane, chloroform, dichloromethane, dichloroethylene, and mineral oil; the ether solvent is at least one selected from diethyl ether, petroleum ether and dibutyl ether; the ketone solvent is selected from at least one of acetone, methyl ethyl ketone, cyclohexanone and isophorone; the benzene derivative solvent is at least one selected from toluene, m-xylene, p-xylene, o-xylene, and chlorobenzene.

6. The coating composition according to claim 1 or 2, wherein the raw materials for preparing the coating composition further comprise a filler, the filler accounts for 1-50% of the raw materials for preparing, and the filler is at least one selected from silicon carbide, alumina, titanium oxide, zinc oxide, magnesium oxide, aluminum hydroxide, white carbon black, attapulgite, kaolin, bentonite, glass microspheres and ceramic microspheres.

7. The coating composition of claim 1, wherein the polysiloxane and polysilazane comprise the coating composition in a range of 10% to 80% by weight.

8. A method of preparing a coating composition comprising the steps of:

mixing polysilazane and polysiloxane, and carrying out copolymerization reaction on the polysilazane and the polysiloxane to generate a polysilazane-polysiloxane copolymer; after mixing polysilazane and polysiloxane, adding a catalyst to the polysilazane and polysiloxane;

adding a fluorine-modified stain resistant agent to the polysilazane-polysiloxane copolymer to produce the coating composition; the polysilazane accounts for 10-80% of the mass of the preparation raw material, the polysiloxane accounts for 10-60% of the mass of the preparation raw material, the fluorine-modified antifouling agent accounts for 1-20% of the mass of the preparation raw material, and the catalyst is an amine catalyst and/or a metal catalyst;

the structural formula of the polysilazane is as follows:

the molecular weight of the polysilazane is 100-1000;

the polysiloxane has the structural formula:

9. The method of preparing a coating composition according to claim 8, wherein after forming the polysilazane-polysiloxane copolymer and before preparing the coating composition, the method further comprises: and adding a solvent into the polysilazane-polysiloxane copolymer, wherein the solvent accounts for 10-66% of the mass of the raw materials, and the solvent is selected from at least one of alkane solvents, ether solvents, ketone solvents and benzene derivative solvents.

10. The method of preparing a coating composition according to claim 8, wherein after forming the polysilazane-polysiloxane copolymer and before preparing the coating composition, the method further comprises: and adding a filler into the polysilazane-polysiloxane copolymer, wherein the filler accounts for 1-50% of the mass of the preparation raw materials, and the filler is selected from at least one of silicon carbide, aluminum oxide, titanium oxide, zinc oxide, magnesium oxide, aluminum hydroxide, white carbon black, attapulgite, kaolin, bentonite, glass microspheres and ceramic microspheres.

11. A coated article comprising a substrate and a coating layer formed on a surface of the substrate, wherein the coating layer contains the coating composition according to any one of claims 1 to 8.

12. The coated article of claim 11, wherein the coating has a thickness in the range of 1 to 100 micrometers.

13. A method of making a coated article comprising the steps of:

providing a substrate and a coating composition according to any one of claims 1 to 8;

14. A domestic appliance, characterized in that it comprises a coating element according to any one of claims 12-13.