WO2020073895A1

WO2020073895A1 - Paint composition and preparation method therefor, coated member and preparation method therefor, and home appliance

Info

Publication number: WO2020073895A1
Application number: PCT/CN2019/109988
Authority: WO
Inventors: 赵莉
Original assignee: 广东美的厨房电器制造有限公司; 美的集团股份有限公司
Priority date: 2018-10-08
Filing date: 2019-10-08
Publication date: 2020-04-16

Abstract

A paint composition. A preparation raw material comprises polysilazane, polysiloxane, and an assistant. The assistant is selected from at least one of a negative ion agent, a wave absorbing agent, and a far-infrared agent. The preparation method for the paint composition comprises: mixing polysilazane with polysiloxane to generate a polysilazane-polysiloxane copolymer, and adding the assistant to the copolymer to prepare the paint composition. The coated member obtained by coating the paint composition on the surface of a matrix can be applied in the home appliance.

Description

Coating composition and preparation method thereof, coated article and preparation method thereof, and household appliances

Technical field

The present application relates to the technical field of household appliances, in particular to a coating composition, a method for preparing the coating composition, a coated article made from the coating composition, a method for preparing the coated article, and application of the coated article Household appliances.

Background technique

In the field of micro-baking, it is usually necessary to form a coating on the surface of kitchen appliances. The material of the above coating is mainly: enamel (the enamel can be formed on the surface of the product through an enamel process), silicone, Teflon, epoxy Powder (the epoxy powder can be sprayed on the surface of the product by powder spraying), or silica sol + silicone hybrid coating. However, the above coating has the disadvantages of low hardness, poor adhesion, poor temperature resistance, and potential safety hazards in food contact. Moreover, the functions of home appliances are relatively simple, and it is difficult to satisfy users' demands for multifunctional home appliances.

Summary of the invention

The main purpose of the present application is to provide a coating composition, which aims to make the coating prepared by the coating composition not only have the advantages of high hardness, good adhesion, good temperature resistance, and food safety level, but also The household appliances applying the coating have the functions of bacteriostasis, deodorization and air purification.

In order to solve the above technical problems, the raw materials for preparing the coating composition provided by the present application include polysilazane, polysiloxane and auxiliary agents, and the auxiliary agents are selected from at least one of negative ion agents, wave absorbers and far infrared agents Species, where,

The negative ion agent is selected from at least one of strange ice stone, tourmaline, opal, and wizard stone, or the negative ion agent is at least one of strange ice stone, tourmaline, opal, and strange stone and is oxidized with rare earth Compounds and / or rare earth compound salts;

The far infrared agent is selected from at least one of boron nitride, titanium nitride, zirconium nitride, manganese dioxide, and zirconium dioxide, or the far infrared agent is boron nitride, titanium nitride, or zirconium nitride , A mixture of at least one of manganese dioxide and zirconium dioxide and tourmaline;

The wave absorber is at least one selected from silicon carbide, silicon nitride, graphene, zinc oxide, titanium carbide, carbon nanotubes, boron nitride, and titanium nitride.

Further, the mass percentage of the polysilazane in the preparation raw material ranges from 6 to 81%, the mass percentage of the polysiloxane in the preparation raw material ranges from 4 to 79%, and the anion agent accounts for the mass of the preparation raw material The percentage range is 0.01-15%.

Further, the structural formula of the polysilazane is:

Wherein R ₁ is hydrogen, alkane, cycloalkane, alkene, aryl, alkoxy, alkylsiloxy, or alkylamine group, R ₂ is hydrogen, alkane, cycloalkane, alkene, aryl , Alkoxy, alkylsiloxy, or alkylamino, R ₃ is hydrogen, alkane, cycloalkane, alkene, aryl, alkoxy, alkylsiloxy, or alkylamine.

Further, at least one of R ₁ and R ₂ is a hydrogen group or an alkene.

Further, the structural formula of the polysiloxane is:

Wherein R ₄ is hydrogen, alkane, cycloalkane, alkene, aryl, alkoxy, or alkylsiloxy, R ₅ is hydrogen, alkane, cycloalkane, alkene, aryl, alkoxy , Or alkylsiloxy.

Further, the preparation raw material further includes a solvent, and the solvent accounts for a mass percentage of the preparation raw material in the range of 10 to 66%. The solvent is selected from alkane solvents, ether solvents, ketone solvents, and benzene derivatives At least one kind of solvent.

Further, the alkane solvent is at least one or more selected from n-hexane, n-octane, n-decane, chloroform, methylene chloride, dichloroethylene, and mineral oil; the ether solvent 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 At least one selected from toluene, m-xylene, p-xylene, o-xylene, and chlorobenzene.

Further, the preparation raw material further includes a catalyst, the catalyst accounts for a mass percentage of the preparation raw material in the range of 0.01 to 5%, and the catalyst is an amine catalyst and / or a metal catalyst.

Further, the amine catalyst is selected from one or more of aliphatic amines, alicyclic amines, alcohol amines, and aromatic amines, and the fatty amines are selected from diethylamine, triethylamine, and triethylene tetra At least one of amines; the alicyclic amine is selected from at least one of triethylenediamine, piperazine, piperidine, and morpholine; the alcohol amine is selected from N, N-dimethylethanolamine , Diisopropanolamine, and N, N-diethylethanolamine at least one; the aromatic amine is selected from aniline, o-phenylenediamine, benzidine, and N, N-dimethylaniline at least One kind.

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

Further, the preparation raw material further includes a filler, and the filler accounts for a mass percentage of the preparation raw material in the range of 1 to 50%, and the filler is selected from silicon carbide, aluminum oxide, titanium oxide, zinc oxide, magnesium oxide, At least one of aluminum hydroxide, white carbon black, attapulgite, kaolin, bentonite, glass microspheres, and ceramic microspheres.

Further, the preparation raw material further includes a filler, a solvent and a catalyst, the filler accounts for a mass percentage of the preparation raw material in a range of 1 to 50%, and the solvent accounts for the preparation raw material in a mass percentage range of 10 to 66%, the mass percentage of the catalyst in the preparation raw material ranges from 0.01 to 5%, and the mass percentage of the polysiloxane and polysilazane in the preparation raw material ranges from 10 to 80%.

Further, the auxiliary agent is a negative ion agent, and the mass percentage of the negative ion agent in the preparation raw material ranges from 0.01 to 15%; or

The auxiliary agent is a far-infrared agent, and the far-infrared agent accounts for 0.01% to 15% of the mass percentage of the prepared raw material; or

The auxiliary agent is a wave-absorbing agent, and the range of the mass percentage of the wave-absorbing agent in the prepared raw material is 0.01-10%.

Further, the auxiliary agent is an anion agent and a far infrared agent, the anion agent accounts for the mass percentage of the preparation raw material in the range of 0.01-15%, and the far infrared agent accounts for the mass percentage of the preparation raw material in the range 0.01 to 15%; or

The auxiliary agent is an anion agent and a wave absorbing agent. The mass percentage of the anion agent in the preparation raw material ranges from 0.01 to 15%, and the range of the mass percentage of the absorbing agent in the preparation raw material is 0.01 to 10%; or

The auxiliary agent is a far-infrared agent and a wave-absorbing agent. The far-infrared agent accounts for 0.01% to 15% of the mass of the prepared raw material, and the wave-absorbing agent accounts for the mass percentage of the prepared raw material. 0.01 ～ 10%.

Further, the auxiliary agent is an anion agent, a far-infrared agent, and a wave-absorbing agent. The mass percentage of the anion agent in the preparation raw material ranges from 0.01 to 15%, and the far-infrared agent accounts for the preparation raw material. The range of the mass percentage is 0.01-15%, and the range of the mass percentage of the absorbing agent in the preparation raw material is 0.01-10%.

The present application also provides a method for preparing a coating composition, including the following steps:

Provide polysilazane, polysiloxane and auxiliary agent, the auxiliary agent is selected from at least one of negative ion agent, wave absorber and far infrared agent, wherein the negative ion agent is selected from strange ice stone, tourmaline , At least one of opal, and wizard stone, or the negative ion agent is a mixture of at least one of strange ice, tourmaline, opal, and wizard stone with rare earth oxide and / or rare earth composite salt; The far infrared agent is selected from at least one of boron nitride, titanium nitride, zirconium nitride, manganese dioxide, and zirconium dioxide, or the far infrared agent is boron nitride, titanium nitride, zirconium nitride, or A mixture of at least one of manganese oxide and zirconium dioxide and tourmaline; the wave absorber is selected from silicon carbide, silicon nitride, graphene, zinc oxide, titanium carbide, carbon nanotubes, boron nitride, and nitrogen At least one of titanium oxide;

Mixing polysilazane and polysiloxane, copolymerization reaction of polysilazane and polysiloxane to produce polysilazane-polysiloxane copolymer;

An auxiliary agent is added to the polysilazane-polysiloxane copolymer to prepare the coating composition.

The present application also provides a coated article including a substrate and a coating layer formed on the surface of the substrate, the coating layer containing the coating composition.

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

The present application also provides a method for preparing a coated part, including the following steps:

Providing a substrate and the coating composition;

The coating composition is applied to the surface of the substrate to form a coating, and the coated article is prepared.

The present application also provides a household appliance including the coating member.

The raw materials for preparing the coating composition of the technical solution of the present application include polysilazane, polysiloxane, and an auxiliary agent. The auxiliary agent is selected from at least one of anionic agents, wave absorbers, and far infrared agents. The negative ion agent is selected from at least one of strange ice stone, tourmaline, opal, and wizard stone, or the negative ion agent is at least one of strange ice stone, tourmaline, opal, and strange stone and is oxidized with rare earth Compounds and / or rare earth compound salts. The far infrared agent is selected from at least one of boron nitride, titanium nitride, zirconium nitride, manganese dioxide, and zirconium dioxide, or the far infrared agent is boron nitride, titanium nitride, or zirconium nitride , At least one of manganese dioxide, zirconium dioxide and tourmaline. The wave absorber is at least one selected from silicon carbide, silicon nitride, graphene, zinc oxide, titanium carbide, carbon nanotubes, boron nitride, and titanium nitride. Polysilazane and polysiloxane will undergo copolymerization reaction to form polysilazane-polysiloxane copolymer. The polysilazane-polysiloxane copolymer has high hardness, good adhesion and good temperature resistance. The advantages make the coating layer formed by the coating composition have the advantages of high hardness, good adhesion and good temperature resistance. The auxiliary agent is dispersed in the polysilazane-polysiloxane copolymer, and the negative ion agent can make the coating layer formed by the coating composition have a function of releasing negative ions. When the coating is applied to household appliances, the household appliances can have the functions of bacteriostasis, deodorization and air purification. The far-infrared agent is dispersed in the polysilazane-polysiloxane copolymer, and the far-infrared agent can impart far-infrared properties to the coating layer formed by the coating composition. When the coating is applied to household appliances, the heating efficiency and heat preservation effect of the household appliances can be improved. The wave absorbing agent is dispersed in the polysilazane-polysiloxane copolymer, and the above wave absorbing agent has excellent wave absorbing performance, so that the wave absorbing layer prepared from the coating composition can be in a thin thickness It has higher wave absorption efficiency and better temperature resistance.

Moreover, the polysilazane, polysiloxane, polysilazane-polysiloxane copolymer, and anion agent are not toxic and hazardous substances, so that the coating made from the coating composition also has food contact The advantages of safety.

detailed description

The following clearly and completely describes the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of this application.

It should be noted that all the directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of the components in a certain posture. If the specific posture changes, the directional indication will change accordingly.

In addition, the descriptions related to "first", "second", etc. in this application are for descriptive purposes only, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may include at least one of the features either explicitly or implicitly. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary people in the art to achieve, when the combination of technical solutions conflicts with each other or cannot be realized, it should be considered that the combination of such technical solutions does not exist , Nor within the scope of protection required by this application.

The present application provides a coating composition.

The raw materials for preparing the coating composition include polysilazane, polysiloxane, and auxiliary agents. The auxiliary agents are selected from at least one of negative ion agents, wave absorbers, and far-infrared agents.

The strange ice, tourmaline, opal, and wizard stone can be collectively referred to as component A.

The rare earth oxides or rare earth composite salts may be collectively referred to as rare earth element-containing substances.

The mass percentage of the component A in the prepared raw material ranges from 8 to 9.5%, optionally from 8 to 9%.

The mass percentage of the rare earth element-containing material in the prepared raw material ranges from 0.5 to 2%, optionally from 1 to 2%.

In an embodiment of the present application, the negative ion agent includes component A and rare earth oxide.

In another embodiment of the present application, the negative ion agent includes component A and rare earth composite salts.

In yet another embodiment of the present application, the negative ion agent includes component A, rare earth oxides, and rare earth composite salts.

The rare earth elements are lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), Dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), yttrium (Y) and scandium (Sc).

The rare earth oxide may be oxides of the above rare earth elements, such as ceria, ceria, lanthanum trioxide, and neodymium trioxide.

The rare earth composite salt may be a salt of the above rare earth element, such as lanthanum phosphate, cerium phosphate, neodymium phosphate, cerium nitrate, lanthanum nitrate, and neodymium nitrate.

The negative ion agent may be in the form of particles, and the particle size of the negative ion agent may be less than 3 microns, optionally, less than 2 microns, and more optionally less than 1 micron.

In an embodiment of the present application, the particle size of the negative ion agent ranges from 0.2 to 0.8 microns. Understandably, the particle size of the negative ion agent is 0.2 micrometer, 0.3 micrometer, 0.4 micrometer, 0.5 micrometer, 0.6 micrometer, 0.7 micrometer, or 0.8 micrometer.

It can be understood that, when the particle size range of the anion agent is set to 0.2-0.8 microns, the anion agent can be more evenly dispersed in the preparation raw materials, and the surface of the prepared coating is relatively smooth.

In another embodiment of the present application, the particle size of the negative ion agent is in the range of 0.2 to 0.5 microns to obtain a smoother coating.

In an embodiment of the present application, a grinding machine may be used to grind the anion agent to reduce the particle size of the anion agent, and then add the anion agent after the grinding treatment to the polysilazane-polysiloxane copolymer.

In another embodiment of the present application, after the anion agent is added to the polysilazane-polysiloxane copolymer, the initial product of the coating is obtained, and the initial product can be ground to reduce the anion agent in the initial product Particle size, and can avoid agglomeration.

The far-infrared agent may be in the form of particles, and the particle size of the far-infrared agent may be less than 3 microns, optionally, less than 2 microns, and more optionally less than 1 micron.

In an embodiment of the invention, the particle size of the far-infrared agent ranges from 0.2 to 0.8 microns. It can be understood that the particle size of the far infrared agent 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 range of the far-infrared agent is set to 0.2-0.8 μm, the far-infrared agent can be more uniformly dispersed in the preparation raw material, and the surface of the prepared coating is relatively smooth.

In another embodiment of the present invention, the particle size of the far-infrared agent ranges from 0.2 to 0.5 microns to obtain a smoother coating.

In an embodiment of the present invention, a far-infrared agent may be ground by a grinder to reduce the particle size of the far-infrared agent, and then the far-infrared agent after grinding treatment is added to the polysilazane-polysiloxane copolymer In.

In another embodiment of the present invention, after the far-infrared agent is added to the polysilazane-polysiloxane copolymer, the initial product of the coating is obtained, and the initial product can be ground to reduce the mid-infrared of the initial product The particle size of the agent and reduce agglomeration.

The wave absorbing agent may be in the form of particles, and the particle size of the wave absorbing agent may be less than 3 microns, optionally, less than 2 microns, and more optionally less than 1 micron.

In an embodiment of the present invention, the particle size of the wave absorber ranges from 0.2 to 0.8 microns. It can be understood that the particle size of the wave absorber 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 range of the wave absorbing agent is set to 0.2-0.8 microns, the wave absorbing agent can be more uniformly dispersed in the preparation raw materials, and the surface of the prepared wave absorbing layer is relatively smooth.

In another embodiment of the present invention, the particle size of the wave absorbing agent is in the range of 0.2-0.5 microns to obtain a more flat wave absorbing layer.

In an embodiment of the present invention, a grinding machine may be used to grind the absorbing agent to reduce the particle size of the absorbing agent, and then add the absorbing agent after the grinding treatment to the polysilazane-polysiloxane copolymerization In.

In another embodiment of the present invention, after the wave absorbing agent is added to the polysilazane-polysiloxane copolymer, the initial product of the wave absorbing layer can be obtained, and the initial product can be ground to reduce the initial product. The particle size of the wave absorber.

Further, the polysilazane-polysiloxane copolymer also has better hardness and adhesion, so that the film layer made from the coating composition also has better hardness and adhesion.

The mass percentage of the polysilazane in the preparation raw material ranges from 6 to 81%, the mass percentage of the polysiloxane in the preparation raw material ranges from 4 to 79%, and the mass percentage of the negative ion agent in the preparation raw material ranges from 0.01 to 15%.

In an embodiment of the present application, the mass percentage of the polysilazane in the prepared raw material ranges from 6 to 81%. Optionally, the mass percentage of the polysilazane in the preparation raw material is in the range of 10 to 70%, more optionally 15 to 60%, and further optionally 20 to 50%.

In an embodiment of the present application, the polysiloxane accounts for 4% to 79% of the mass percentage of the prepared raw material. Optionally, the mass percentage of the polysiloxane to the preparation raw material ranges from 10 to 60%, more preferably from 15 to 50%, and further preferably from 20 to 40%.

In an embodiment of the present application, the mass percentage of the negative ion agent in the prepared raw material ranges from 0.01 to 15%. Optionally, the mass percentage of the negative ion agent in the preparation raw material ranges from 1 to 15%, more preferably from 5 to 10%.

The polysilazane in the technical solution of the present application accounts for 6 to 81% of the mass of the raw material, and the polysiloxane accounts for the mass of the raw material in the range of 4 to 79%. At this time, the polysilazane can Polysiloxane copolymerizes to produce a certain content of polysilazane-polysiloxane copolymer, the anion agent accounts for the mass percentage of the prepared raw material in the range of 0.01 to 15%, and is uniformly dispersed in polysilazane-polysilicon In the oxane copolymer, the polysilazane-polysiloxane copolymer and the anion agent at this content can make the coating made of it not only have high hardness, good adhesion, good temperature resistance and food contact safety The advantages can also make household appliances applying the coating have functions of bacteriostasis, deodorization and air purification.

The structural formula of the polysilazane is:

The structural formula of the polysiloxane is:

In an embodiment of the present application, at least one of R ₁ and R ₂ is a hydrogen group or an alkene.

It can be understood that the polysilazane and polysiloxane in the preparation raw materials are both high temperature resistant materials.

It can be understood that R ₁ , R ₂ and R ₃ may be the same group or different groups, which can be adjusted according to actual needs.

It can be understood that R ₄ and R ₅ may be the same group or different groups, which can be adjusted according to actual needs.

It should be noted that R ₁ , R ₂ and R ₃ can also be other groups that can achieve the same or similar functions, which is not limited in this application; R ₄ and R ₅ can also be other groups that can achieve the same or similar functions This application does not limit this group.

In the technical solution of the present application, the polysilazane can undergo a copolymerization reaction with the polysiloxane to form the host resin of the coating composition, so that the coating made from the coating composition has hardness High, good adhesion, good temperature resistance, and the advantages of reaching food contact safety level.

The molecular weight of the polysilazane is 100-1000.

The molecular weight of the polysiloxane is 100-1300.

In an embodiment of the present application, the molecular weight of the polysilazane is 100, 200, 300, 400, 500, 600, 700, 800, 900 or 1000.

In an embodiment of the present application, the molecular weight of the polysilazane may be 100-700, and more preferably 100-300.

In an embodiment of the present application, the molecular weight of the polysiloxane is 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, or 1300.

In an embodiment of the present application, the molecular weight of the polysiloxane may be 200-900, more preferably 200-500.

The molecular weight of the polysilazane in the preparation material of the technical solution of the present application is 100-1000, the molecular weight of the polysiloxane is 100-1300, the polysilazane with the molecular weight 100-1000 and the polysilicon with the molecular weight 100-1300 After the copolymerization of oxane, polysilazane-polysiloxane copolymer can be formed, and the coating composition containing the polysilazane-polysiloxane copolymer is formed on the substrate to form a coating, and the coating It has the advantages of better hardness, adhesion, temperature resistance, and safety level of food contact.

The preparation raw material further includes a solvent, and the solvent accounts for a mass percentage of the preparation raw material in the range of 10 to 66%, optionally 15 to 50%, more optionally 20 to 40%, and further optionally 30 to 35%.

The solvent is selected from at least one of alkane solvents, ether solvents, ketone solvents, and benzene derivative solvents.

The alkane solvent may be selected from at least one of n-hexane, n-octane, n-decane, chloroform, methylene chloride, dichloroethylene, and mineral oil.

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

The ketone solvent may be 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.

It should be noted that other solvents that can dissolve the copolymer of polysiloxane and polysilazane can also be used as the solvent of the present application, which is not limited in this application.

The polysilazane-polysiloxane copolymer is soluble in a solvent, so that the polysilazane-polysiloxane copolymer can be easily formed on the surface of the substrate.

The preparation raw material further includes a catalyst, and the mass percentage of the catalyst in the preparation raw material ranges from 0.01 to 5%, optionally from 0.1 to 5%, more optionally from 1 to 5%, and further optionally from 2 to 3%.

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

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

The fatty amine may be selected from at least one of diethylamine, triethylamine, and triethylenetetramine.

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

The alcohol amine may be selected from at least one of 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-based catalyst may be an organic tin catalyst and / or a palladium-based catalyst.

The organotin catalyst may be selected from at least one of dibutyltin dilaurate, stannous octoate, dimethyl tin, and triphenyl tin.

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

It should be noted that the catalyst of the present application may also be other catalysts with similar performance, which is not limited in this application.

In the technical solution of the present application, the catalyst can accelerate the copolymerization reaction of polysilazane and polysiloxane, thereby generating the polysilazane-polysiloxane copolymer in a short time.

The preparation raw material further includes a filler, and the filler accounts for the mass percentage of the preparation raw material in the range of 1-50%, optionally 5-40%, optionally 10-30%, and more optionally 15-25 %.

The filler is selected from silicon carbide, alumina, titanium oxide, zinc oxide, magnesium oxide, aluminum hydroxide, white carbon (silica aerogel), attapulgite, kaolin, bentonite, glass microspheres, and ceramic micro At least one of the balls.

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

In an embodiment of the present application, the particle size of the filler ranges from 0.2 to 0.8 microns. Understandably, 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 range of the filler is set to 0.2-0.8 microns, the filler can be more uniformly dispersed in the preparation raw material, and the surface of the prepared coating is relatively smooth.

In another embodiment of the present application, the particle size of the filler ranges from 0.2 to 0.5 microns to obtain a smoother coating.

In an embodiment of the present application, the filler can be ground by a grinder to reduce the particle size of the filler, and then the filler after the grinding treatment is added to the polysilazane-polysiloxane copolymer.

In another embodiment of the present application, after the filler is added to the polysilazane-polysiloxane copolymer, the primary product of the coating is obtained, and the primary product can be ground to reduce the particle size of the filler in the primary product path.

In an example of the present application, the filler is uniformly dispersed in the coating.

In the technical solution of the present application, the filler is selected from silicon carbide, aluminum oxide, titanium oxide, zinc oxide, magnesium oxide, aluminum hydroxide, white carbon (silica aerogel), attapulgite, kaolin, bentonite, glass At least one of microspheres and ceramic microspheres to improve the hardness, adhesion and temperature resistance of the coating.

It should be noted that other fillers with high temperature resistance can also be used as fillers in this application, which is not limited in this application.

The auxiliary agent is an anion agent, and the anion agent accounts for 0.01% to 15% of the mass percentage of the prepared raw material. Optional 0.1-10%, more optional 1-10%, further optional 2-8%.

In an embodiment of the present application, the negative ion agent is uniformly dispersed in the coating.

The preparation material of the technical solution of the present invention further includes an anion agent, which can be combined with the polysiloxane-polysilazane copolymer product to make the coating composition have the function of releasing anion, that is, it has a bacteriostatic function And purify the air. Specifically, the negative ion agent can release negative ions to sterilize and remove odors and various harmful gases in the microwave oven or indoors.

It should be noted that other negative ion agents having a function of releasing negative ions can also be used as the negative ion agents of the present invention, and the present invention does not limit this.

The auxiliary agent is a wave-absorbing agent, and the range of the mass percentage of the wave-absorbing agent in the prepared raw material is 0.01-10%. Optionally, the range of the mass percentage of the wave absorbing agent to the prepared raw material is 1-8%, more optionally 5-8%, and further optionally 5-7%.

In an embodiment of the present application, the wave absorber is uniformly dispersed in the coating.

The preparation materials of the technical solution of the present application include a wave absorbing agent, which can be uniformly dispersed in the coating composition. The wave absorbing agent has excellent wave absorbing properties, making the coating made from the coating composition A thin thickness can have a high wave absorption efficiency.

It should be noted that other wave absorbing agents with wave absorbing properties can also be used as the wave absorbing agent of the present application, which is not limited in this application.

The auxiliary agent is a far-infrared agent, and the far-infrared agent accounts for 0.01% to 15% of the mass percentage of the prepared raw material.

The range of the mass percentage of the far-infrared agent in the prepared raw material is 0.01-15%. Optionally, the range of the mass percentage of the far-infrared agent in the prepared raw material is 1-15%, more optionally 5-15%, and further optionally 5-10%.

The preparation material of the technical solution of the present application includes a far-infrared agent, which can be evenly dispersed in the coating composition, and the far-infrared agent can make the coating formed by the coating composition also have far-infrared properties. When the coating is applied to household appliances, the heating efficiency and heat preservation effect of the household appliances can be improved.

It should be noted that other far-infrared agents with far-infrared properties can also be used as far-infrared agents in this application, and this application does not limit this.

In some embodiments of the present application, the auxiliary agent is an anion agent and a far-infrared agent. The mass percentage of the anion agent in the preparation raw material ranges from 0.01 to 15%, and the far-infrared agent accounts for the preparation raw material. The range of the mass percentage is 0.01-15%.

In several embodiments of the present application, the auxiliary agent is an anion agent and a wave absorbing agent, the mass percentage of the anion agent in the preparation raw material ranges from 0.01 to 15%, and the wave absorbing agent accounts for the preparation raw material The range of mass percentage is 0.01 ～ 10%.

In several embodiments of the present application, the auxiliary agent is a far-infrared agent and a wave-absorbing agent, the far-infrared agent accounts for 0.01% to 15% of the mass percentage of the prepared raw material, and the wave-absorbing agent accounts for the The mass percentage of the prepared raw material ranges from 0.01 to 10%.

In several embodiments of the present application, the auxiliary agent is an anion agent, a far-infrared agent, and a wave-absorbing agent. The mass percentage of the anion agent in the preparation raw material ranges from 0.01 to 15%, and the far-infrared agent The mass percentage of the prepared raw material ranges from 0.01 to 15%, and the mass percentage of the absorbing agent to the prepared raw material ranges from 0.01 to 10%.

In an embodiment of the present application, the raw material for preparing the coating composition further includes a color material, and the color material accounts for the mass percentage of the raw material in the range of 0.01 to 5%, optionally 0.1 to 5%, and more It is selected from 1 to 5%, and further from 2 to 3%.

The colorant is selected from at least one of white colorant, yellow colorant, orange colorant, black colorant, purple colorant, brown colorant, green colorant, blue colorant, gray colorant, and red colorant In order to make the coating prepared by the coating composition have a colorful appearance.

The white colorant is at least one selected from the group consisting of antimony white (Antimony white), barium sulfate (Barium sulfate), zinc barium white (Lithopone), titanium white (Titanium white), and zinc white.

The yellow colorant is Nickel Antimony Titanium (Nickel Titanium Antimony) and / or Titanium Chrome Brown (Chrome Titanium Brown).

The orange pigment is Rutile Tin Zinc.

The black colorant is selected from Copper chromite black spinel, Titanium black, Manganese dioxide (MnO ₂ ), Mars black, Ivory black, And carbon black (Carbon black) at least one.

The purple color material is cobalt phosphate (Cobalt Phosphate).

The brown coloring material is titanium manganese brown (Manganese antimony titanium) and / or zinc iron chrome brown (Chromium iron brown).

The green colorant is at least one of cobalt green, malachite, and green earth.

The blue colorant is selected from the group consisting of ultramarine, cobalt blue, Egyptian blue, Han blue, azurite, and YInMn blue At least one.

The gray colorants are Copper chromite black spinel, Titanium black, Manganese dioxide (MnO ₂ ), Mars black, Mars black, Vine black, and ivory At least one of ink (Ivory black) and carbon black (Antimony white), barium sulfate (Barium Sulfate), zinc barium white (Lithopone), titanium white (Titanium white), zinc white (Zinc A mixture of at least one of white), and at least one of burnt sienna, India Red, and cobalt blue can be further added to the mixture.

The red colorant is selected from at least one of burnt loess (Burnt Sienna), burnt ochre (Red ochre), and Indian red (India Red).

Understandably, the color material can be selected according to the actual needs, so that the coating has a better appearance.

In an embodiment of the present application, the raw materials for preparing the coating include: polysiloxane, polysilazane, anion agent, filler, solvent, and catalyst. Wherein, the mass percentage of the polysiloxane and polysilazane in the preparation raw material ranges from 10% to 80%, the mass percentage of the negative ion agent in the preparation raw material ranges from 0.01 to 15%, and the filler accounts for the The mass percentage of the prepared raw material ranges from 1 to 50%, the solvent mass percentage of the prepared raw material ranges from 10 to 66%, and the catalyst mass percentage of the prepared raw material ranges from 0.01 to 5%.

In an embodiment of the present application, the raw materials for preparing the coating include: polysiloxane, polysilazane, anion agent, filler, solvent, far infrared agent, wave absorber, and catalyst. Wherein, the mass percentage of the polysiloxane and polysilazane in the preparation raw material ranges from 10% to 80%, the mass percentage of the negative ion agent in the preparation raw material ranges from 0.01 to 15%, and the filler accounts for the The mass percentage of the prepared raw material ranges from 1 to 50%, the solvent accounts for 10 to 66% of the prepared raw material, the far infrared agent accounts for the prepared raw material from 0.01 to 15%, and the wave absorber accounts for The mass percentage of the prepared raw material ranges from 0.01 to 20%, and the mass percentage of the catalyst to the prepared raw material ranges from 0.01 to 5%.

In an embodiment of the present application, the raw materials for preparing the coating include: polysiloxane, polysilazane, anion agent, filler, solvent, colorant, and catalyst. Wherein, the mass percentage of the polysiloxane and polysilazane in the preparation raw material ranges from 10% to 80%, the mass percentage of the negative ion agent in the preparation raw material ranges from 0.01 to 15%, and the filler accounts for the The mass percentage of the prepared raw material ranges from 1 to 50%, the solvent accounts for 10 to 66% of the prepared raw material, the color material accounts for the prepared raw material from 0.01 to 5%, and the catalyst accounts for the preparation The mass percentage of raw materials ranges from 0.01 to 5%.

In an embodiment of the present application, the raw materials for preparing the coating include: polysiloxane, polysilazane, negative ion agent, filler, solvent, far infrared agent, wave absorber, colorant, and catalyst. Wherein, the mass percentage of the polysiloxane and polysilazane in the preparation raw material ranges from 10% to 80%, the mass percentage of the negative ion agent in the preparation raw material ranges from 0.01 to 15%, and the filler accounts for the The mass percentage of the prepared raw material ranges from 1 to 50%, the solvent accounts for 10 to 66% of the prepared raw material, the far infrared agent accounts for the prepared raw material from 0.01 to 15%, and the wave absorber accounts for The mass percentage of the prepared raw material ranges from 0.01 to 10%, the mass percentage of the color material to the prepared raw material ranges from 0.01 to 5%, and the mass percentage of the catalyst to the prepared raw material ranges from 0.01 to 5%.

Understandably, the polysilazane, polysiloxane, polysilazane-polysiloxane copolymer, negative ion agent, solvent, colorant, far-infrared agent, wave absorber, catalyst, and filler of the present application are all It is not a toxic and hazardous substance, so that the coating prepared from the preparation material has the advantages of food contact safety.

In an embodiment of the present application, the polysiloxane and polysilazane can be placed in the reactor, and the polysiloxane and polysilazane can be stirred for the first time to make the polysiloxane and polysilazane The alkane is mixed evenly, and the polysiloxane and polysilazane will undergo a copolymerization reaction to form a polysiloxane-polysilazane copolymer.

In an implementation of the present application, the stirring rate of the first stirring process is 100-800 rpm, optionally 200-600 rpm, and more preferably 400-500 rpm.

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

It can be understood that the time of the first stirring treatment is consistent with the time of the copolymerization reaction.

In another embodiment of the present application, the particle size of the negative ion agent is in the range of 0.2-0.5 microns to obtain a smoother coating.

In an embodiment of the present application, a grinding machine is used to grind the anion agent to reduce the particle size of the anion agent, and then the anion agent after the grinding treatment is added to the polysilazane-polysiloxane copolymer.

In another embodiment of the present application, after the anion agent is added to the polysilazane-polysiloxane copolymer, the initial product of the coating is obtained, and the initial product can be ground to reduce the anion agent in the initial product The particle size.

In an embodiment of the present invention, a far-infrared agent can be ground by a grinder to reduce the particle size of the far-infrared agent, and then the far-infrared agent after grinding treatment is added to the polysilazane-polysiloxane copolymer In.

After mixing polysilazane and polysiloxane, and before adding an anion agent to the polysilazane-polysiloxane copolymer, the preparation method of the coating composition further includes: adding polysilazane and polysiloxane The step of adding a catalyst to the siloxane, wherein the catalyst accounts for the mass percentage of the prepared raw material in the range of 0.01 to 5%, optionally 0.1 to 5%, more optionally 1 to 5%, further optional It is 2 ~ 3%.

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

Understandably, after the catalyst is added to the polysilazane and the polysiloxane, the second stirring treatment is performed to make the polysilazane, the polysiloxane and the catalyst uniformly mixed.

In an embodiment of the present application, the stirring rate of the second stirring process may be 1000-2000 rpm, may be 1200-1800 rpm, and may be 1500-1600 rpm.

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

It should be noted that the stirring rate of the second stirring process and the time of the second stirring process may also be other values, which is not limited in this application.

In the technical solution of the present application, a catalyst may be added to the polysilazane and polysiloxane to promote the copolymerization reaction of the polysiloxane and the polysilazane to form the host resin required by the application, namely polysiloxane Alkane-polysilazane copolymer.

After forming the polysilazane-polysiloxane copolymer, before preparing the coating composition, the method for preparing the coating composition further includes: adding a solvent to the polysilazane-polysiloxane copolymer, Packing steps.

The mass percentage of the solvent to the prepared raw material ranges from 10 to 66%, optionally from 15 to 50%, more preferably from 20 to 40%, and further from 30 to 35%.

The range of the mass percentage of the filler in the prepared raw material is 1-50%, optionally 5-40%, optionally 10-30%, and more optionally 15-25%.

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

In an embodiment of the present application, after adding a solvent and a filler to the polysilazane-polysiloxane copolymer, it may be subjected to a third stirring treatment to make the polysilazane-polysiloxane copolymer , Solvent and filler are mixed evenly.

Understandably, a solvent may be added to the polysilazane-polysiloxane copolymer, and then a filler is added to perform a third stirring treatment. It is also possible to add a solvent and a filler to the polysilazane-polysiloxane copolymer at the same time and perform a third stirring treatment on it.

The stirring rate of the third stirring treatment may be 100-3000 rpm, optionally 500-2000 rpm, and more preferably 1000-1500 rpm.

In an embodiment of the present application, the time of the third stirring treatment may be 2-20 minutes, optionally 5-15 minutes, and more optionally 8-12 minutes.

It should be noted that the stirring rate of the third stirring process and the time of the third stirring process may also be other values, which is not limited in this application.

In an embodiment of the present application, the particle size of the filler ranges from 0.2 to 0.8 microns. Understandably, 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 range of the filler is set to 0.2-0.8 microns, the filler can be uniformly dispersed in the coating composition, and the surface of the prepared coating is relatively smooth.

In an embodiment of the present application, the filler may be ground by a grinder to reduce the particle size of the filler, and then the filler after grinding treatment is added to the polysilazane-polysiloxane copolymer.

In another implementation of the present application, a filler with a larger particle size may be directly added to the polysilazane-polysiloxane copolymer, and then the coating composition is subjected to grinding treatment to reduce the content of the coating composition The particle size of the filler.

The grinding treatment time may be 0.5 to 1 hour. The grinding time can be adjusted according to actual needs to obtain fillers with corresponding particle sizes.

In the technical solution of the present application, the polysilazane-polysiloxane copolymer is soluble in a solvent, so that the coating composition can be more easily applied to the surface of the substrate. The filler can also be dispersed in the solvent and the polysilazane-polysiloxane copolymer to increase the hardness, adhesion and temperature resistance of the coating composition, and can also be used by households applying the coating The electric appliance has the advantages of high wave absorption efficiency, high heating efficiency and good thermal insulation effect.

It can be understood that, when a filler is added to the polysilazane-polysiloxane copolymer, a colorant may also be added together to make the coating have a better appearance.

It should also be noted that in the preparation method of the coating composition, the order of addition of each component and the grinding method can be adjusted according to actual needs, and the above stirring speed, stirring time, etc. are only typical values in the preparation process. Adjust according to actual needs.

Understandably, the coating composition may be applied to the surface of the substrate to form the coating.

Understandably, the coating made from the coating composition has a thermal weight loss of less than 5% in an oxygen environment at 500 ° C, indicating that the coating has very excellent heat resistance.

Please refer to the above embodiments for the composition and proportion of the coating composition. Since this coating article adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments. I will not repeat them here.

The thickness of the coating layer ranges from 1 micron to 100 microns, optionally from 1 to 80 microns, more preferably from 5 to 70 microns, and further optionally from 10 to 50 microns.

The thickness of the coating may be 1 micron, 2 microns, 5 microns, 10 microns, 15 microns, 20 microns, 25 microns, 30 microns, 35 microns, 40 microns, 45 microns, 50 microns, 55 microns, 60 microns, 65 microns, 70 microns, 75 microns, 80 microns, 85 microns, 90 microns, 95 microns, or 100 microns.

It is understandable that the thickness of the coating can be adjusted according to actual needs.

In the technical solution of the present application, when the thickness of the coating is in the range of 1 to 100 microns, the household appliances with the coating not only have better functions of bacteriostasis, deodorization and air purification, but also have heating The advantages of high efficiency and good thermal insulation.

Providing a substrate and the coating composition;

Understandably, the coating composition may be subjected to grinding treatment to reduce agglomeration, and then the coating composition after grinding treatment may be applied to the surface of the substrate.

Understandably, when the coating composition is applied to the surface of the substrate, the substrate is subjected to a heat treatment, and the temperature of the heat treatment is lower than 300 ° C, optionally 200 ° C to 280 ° C, so that the coating on the surface of the substrate The material solidifies to form a coating. The thickness of the coating can range from 1 to 100 microns.

In an embodiment of the present application, the substrate may be pre-treated, and the pre-treatment may be degreasing, cleaning, and drying to clean the surface of the substrate and improve the adhesion of the coating to the surface of the substrate.

In the technical solution of the present application, the coating composition can be directly applied to the surface of the substrate, and the coated part can be prepared after the coating composition is cured, so that the method for preparing the coated part of the present application has a simple molding process The advantages. Moreover, the temperature of the curing process is lower than 300 ° C. Compared with the technical solution of high-temperature curing in the prior art, the method for preparing a coated article of the present application also has the advantage of low energy consumption.

It is understandable that since the coating has better adhesion, no pretreatment such as sanding of the substrate is required, which reduces the process difficulty of the preparation method of the coated part, and compared with the prior art For the technical solution of sanding the substrate, the method for preparing the coated article of the present application also has the advantages of environmental protection.

The household appliance may be a microwave oven, an induction cooker, an oven, a bread machine, a pasta machine, a cooker hood, an air explosion pan, a cake stall, a humidifier, an electric kettle, a hair dryer, a juicer, a pressure cooker, a rice cooker, a water heater, a computer, Electric fan, electric frying pan, soy milk maker, air conditioner, speaker, stove, or refrigerator, etc.

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

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

For the specific structure of the household appliance, please refer to the above-mentioned embodiments. Since this household appliance adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments. Repeat.

It is understandable that the raw materials for the preparation of the coating composition are not substances restricted or prohibited by domestic and foreign regulations, and will not be produced during the preparation of the coating composition and the coated part. Harmful substances make the coating composition, coating, coated parts and electronic devices have the characteristics of safety and environmental protection.

The following are several embodiments of the method for preparing a coated part of the present application:

Example 1

Provide raw materials for preparation, based on mass percentage, the raw materials include: polysilazane 50%, polysiloxane 40%, tourmaline 3% with a particle size range of 0.2 to 0.3 microns, and a particle size range of 0.2 to 0.3 microns 4% of zirconium nitride, and 3% of titanium carbide with a particle size range of 0.2 to 0.3 microns, wherein R ₁ of the polysilazane is a hydrogen group, R ₂ is a hydrogen group, and R ₃ is a hydrogen group. In the polysiloxane, R ₄ is a hydrogen group and R ₅ is an alkene;

Put the polysilazane and polysiloxane in the reactor, mix the polysilazane and polysiloxane at a speed of 600 rpm, and the polysiloxane and polysilazane undergo copolymerization reaction to generate polysiloxane Alkane-polysilazane copolymer;

Add tourmaline, zirconium nitride and titanium carbide to the copolymer and stir at a speed of 1000 rpm to obtain a coating composition;

The coating composition was applied to the surface of the substrate to form a coating layer with a thickness of 50 m to prepare the coated article.

Example 2

Provide raw materials for preparation, based on mass percentage, the raw materials for preparation include: polysilazane 40%, polysiloxane 25%, dibutyl ether 25%, and strange ice 10% with a particle size ranging from 0.21 to 0.33 microns. , R ₁ of the polysilazane is an aryl group, R ₂ is a hydrogen group, R ₃ is an alkylamine group, R ₄ of the polysiloxane is a cycloalkane, and R ₅ is an alkylsiloxy group;

Put the polysilazane and polysiloxane in the reactor, mix the polysilazane and polysiloxane at a speed of 200 rpm, and the polysiloxane and polysilazane will undergo a copolymerization reaction to generate polysiloxane Alkane-polysilazane copolymer;

After adding dibutyl ether to the copolymer, add odd ice stone and stir at a speed of 1100 rpm to obtain a coating composition;

The coating composition is applied to the surface of the substrate to form a coating layer with a thickness of 30 μm to prepare the coated article.

Example 3

Provide raw materials for preparation, based on mass percentage, the raw materials include: polysilazane 20%, polysiloxane 20%, toluene 18%, isophorone 10%, particle size range of 2 to 3 microns of hydroxide Aluminum 10%, silicon carbide 10% with a particle size range of 2 to 3 microns, opal 10% with a particle size range of 2 to 3 microns, and dimethyl tin 2%, wherein R ₁ of the polysilazane is Alkenes, R ₂ is alkyl siloxane, R ₃ is alkanes, R ₄ of the polysiloxane is alkanes, R ₅ is alkenes;

Place polysilazane and polysiloxane in the reactor, mix the polysilazane and polysiloxane at 300 rpm, add dimethyl tin, and stir at 1000 rpm, Promote the copolymerization of polysiloxane and polysilazane to form polysiloxane-polysilazane copolymer;

After adding toluene and isophorone to the copolymer, then adding aluminum hydroxide, silicon carbide and opal, and stirring at a speed of 1200 rpm to obtain the initial coating product;

Grinding the initial product so that the particle size of aluminum hydroxide, silicon carbide and opal ranges from 0.2 to 0.6 microns to obtain a coating composition;

The coating composition is applied to the surface of the substrate to form a coating layer with a thickness of 10 microns to prepare the coated article.

Example 4

Provide raw materials for preparation, based on mass percentage, the raw materials include: polysilazane 15%, polysiloxane 15%, o-xylene 20%, petroleum ether 10%, particle size range of 2 to 3 microns 11% of aluminum, 15% of white carbon black with a particle size range of 2 to 3 microns, 10% of wizardry stone with a particle size range of 2 to 3 microns, and 4% of dimethyl tin, wherein the polysilazane R ₁ is a hydrogen group, R ₂ is a cycloalkane, R ₃ is a hydrogen group, R ₄ of the polysiloxane is an alkylamine group, and R ₅ is an alkoxy group;

Place polysilazane and polysiloxane in the reactor, mix polysilazane and polysiloxane at 500 rpm, add dimethyl tin, and stir at 1050 rpm, Promote the copolymerization of polysiloxane and polysilazane to form polysiloxane-polysilazane copolymer;

After adding o-xylene and petroleum ether to the copolymer, then adding aluminum hydroxide, white carbon black, and wizard stone, and stirring at a speed of 1200 rpm to obtain the initial coating product;

Grinding the initial product so that the particle size of aluminum hydroxide, white carbon black and wizard stone ranges from 0.2 to 0.4 microns to obtain a coating composition;

The coating composition is applied to the surface of the substrate to form a coating layer with a thickness of 15 microns to prepare the coated article.

Example 5

Provide raw materials for preparation, based on mass percentage, the raw materials include: polysilazane 12%, polysiloxane 11%, n-hexane 17%, acetone 20%, and attapulgite 4% with a particle size ranging from 2 to 3 microns , 4% white carbon black with a particle size range of 2 to 3 microns, 14% magnesium oxide with a particle size range of 2 to 3 microns, tourmaline 9.5% with a particle size range of 2 to 3 microns, and a particle size range of 2 to 3 micron lanthanum trioxide 0.5%, boron nitride 2% with a particle size range of 2 to 3 microns, graphene 2% with a particle size range of 2 to 3 microns, titanium dioxide with a particle size range of 2 to 3 microns 3%, and triethylenetetramine 1%, wherein R ₁ of the polysilazane is an alkylamine group, R ₂ is an alkyl group, R ₃ is an aryl group, and R ₄ of the polysiloxane is an alkane Siloxane, R ₅ is cycloalkane;

Place polysilazane and polysiloxane in the reactor, mix polysilazane and polysiloxane at a speed of 400 rpm, add triethylenetetramine, and stir at a speed of 1250 rpm, Promote the copolymerization of polysiloxane and polysilazane to form polysiloxane-polysilazane copolymer;

After adding n-hexane and acetone to the copolymer, attapulgite, white carbon black, magnesium oxide, tourmaline, lanthanum trioxide, boron nitride, graphene, and titanium white were added at 1500 rpm Stir at a speed to obtain the initial coating product;

The initial product is subjected to grinding treatment so that the particle size of the attapulgite, white carbon black, magnesium oxide, tourmaline, lanthanum trioxide, boron nitride, graphene, and titanium white ranges from 0.21 to 0.33 micrometers. Coating composition;

The coating composition is applied to the surface of the substrate to form a coating layer with a thickness of 20 microns to prepare the coated article.

Example 6

Provide raw materials for preparation, based on mass percentage, the raw materials include: 10% polysilazane, 10% polysiloxane, 10% methyl ethyl ketone, 23% m-xylene, and alumina 30 with a particle size ranging from 0.2 to 0.32 microns %, Titanium oxide 3% with a particle size range of 0.21 to 0.32 microns, bentonite 3% with a particle size range of 0.2 to 0.36 microns, strange ice 9.5% with a particle size range of 0.2 to 0.32 microns, and a particle size range of 0.2 to 0.32 micron ceria 0.5%, triphenyltin 1%, wherein the polysilazane R ₁ is aryl, R ₂ is aryl, R ₃ is hydrogen, the polysiloxane R ₄ is an alkene and R ₅ is a hydrogen group;

Put the polysilazane and polysiloxane in the reactor, mix the polysilazane and polysiloxane at 500 rpm, add triphenyltin, and stir at 1750 rpm, Promote the copolymerization of polysiloxane and polysilazane to form polysiloxane-polysilazane copolymer;

After adding methyl ethyl ketone and m-xylene to the copolymer, and then adding alumina, titanium oxide, bentonite, strange ice stone and ceria, stirring at a speed of 1500 rpm to obtain a coating composition;

The coating composition is applied to the surface of the substrate to form a coating layer with a thickness of 35 microns to prepare the coated article.

Example 7

Provide raw materials for preparation, based on mass percentage, the raw materials include: polysilazane 8%, polysiloxane 7%, toluene 49%, alumina with a particle size range of 2 to 3 microns 17%, particle size range is 2 to 3 microns of zinc oxide 5%, ceramic microspheres with a particle size range of 0.2 to 0.3 microns 3%, opal with a particle size range of 2 to 3 microns 9.5%, and a particle size range of 2 to 3 microns lanthanum phosphate 0.5 %, Palladium acetate salt 1%, wherein R ₁ of the polysilazane is an alkane, R ₂ is an alkane, R ₃ is a hydrogen group, R ₄ of the polysiloxane is an alkoxy group, and R ₅ is Alkoxy

Place polysilazane and polysiloxane in the reactor, mix polysilazane and polysiloxane at 300 rpm, add palladium acetate salt, and stir at 1200 rpm to promote Polysiloxane and polysilazane copolymerize to form polysiloxane-polysilazane copolymer;

After toluene is added to the copolymer, alumina, zinc oxide, opal and lanthanum phosphate are added, and agitation is performed at a speed of 1500 rpm to obtain an initial coating product;

Grind the initial product to make the particle size of alumina, zinc oxide, opal and lanthanum phosphate range from 0.22 to 0.52 microns, and then add ceramic microspheres to obtain the initial product of the coating;

The coating composition is applied to the surface of the substrate to form a coating layer with a thickness of 40 microns to prepare the coated article.

Example 8

Provide raw materials for preparation, based on mass percentage, the raw materials include: polysilazane 6%, polysiloxane 4%, diethyl ether 25.5%, paraxylene 30%, white carbon black with a particle size ranging from 0.23 to 0.36 microns 10%, aluminum hydroxide 12% with a particle size range of 0.23 to 0.36 microns, 2% glass microspheres with a particle size range of 0.22 to 0.35 microns, and wizardry stone 9.5% with a particle size range of 0.23 to 0.34 microns, particle size range It is 0.23-0.34 micron neodymium phosphate 0.5%, N, N-dimethylaniline 0.5%, wherein the polysilazane R ₁ is an alkene, R ₂ is an aryl group, R ₃ is a hydrogen group, so In the polysiloxane, R ₄ is an alkane and R ₅ is an alkane;

Place polysilazane and polysiloxane in the reactor, mix polysilazane and polysiloxane at 500 rpm, add N, N-dimethylaniline at 1050 rpm Stir to promote the copolymerization of polysiloxane and polysilazane to form polysiloxane-polysilazane copolymer;

After adding ether and p-xylene to the copolymer, then adding white carbon black, aluminum hydroxide, glass microspheres, wizardry stone and neodymium phosphate, and stirring at a speed of 1700 rpm to obtain a coating composition;

The coating composition is applied to the surface of the substrate to form a coating layer with a thickness of 45 microns to prepare the coated article.

Example 9

Provide raw materials for preparation, based on mass percentage, the raw materials for preparation include: polysilazane 30%, polysiloxane 35%, dibutyl ether 15%, tourmaline 15% with a particle size range of 0.23-0.35 microns, particles The diameter range of 0.23 to 0.35 microns celestite 2%, triethylenediamine 3%, wherein the polysilazane R ₁ is a hydrogen group, R ₂ is a hydrogen group, R ₃ is a hydrogen group, polysilicon R ₄ of the oxane is a hydrogen group and R ₅ is an alkene;

Put the polysilazane and polysiloxane in the reactor, mix the polysilazane and polysiloxane at 600 rpm, add triethylenediamine, and stir at 1500 rpm, To promote the copolymerization of polysiloxane and polysilazane to form polysiloxane-polysilazane copolymer;

After adding dibutyl ether to the copolymer, then add tourmaline and celestite and stir at a speed of 1000 rpm to obtain a coating composition;

The coating composition is applied to the surface of the substrate to form a coating layer with a thickness of 55 microns to prepare the coated article.

Example 10

Provide preparation materials, based on mass percentage, the preparation materials include: polysilazane 40%, polysiloxane 35%, dibutyl ether 15%, tourmaline 5% with a particle size range of 0.23-0.35 microns, Sanya Ethyldiamine 5%, wherein R ₁ of the polysilazane is a hydrogen group, R ₂ is a hydrogen group, R ₃ is a hydrogen group, R ₄ of the polysiloxane is a hydrogen group, and R ₅ is Alkenes

Place polysilazane and polysiloxane in the reactor, mix polysilazane and polysiloxane at 200 rpm, add triethylenediamine, and stir at 1200 rpm, To promote the copolymerization of polysiloxane and polysilazane to form polysiloxane-polysilazane copolymer;

After adding dibutyl ether to the copolymer, then add tourmaline and stir at a speed of 1200 rpm to obtain a coating composition;

The coating composition is applied to the surface of the substrate to form a coating layer with a thickness of 60 μm to prepare the coated article.

Example 11

Provide raw materials for preparation, based on mass percentage, the raw materials for preparation include: 50% polysilazane, 28% polysiloxane, 15% dibutyl ether, 2% tourmaline with a particle size range of 0.23-0.35 microns, Sanya Ethyldiamine 5%, wherein R ₁ of the polysilazane is a hydrogen group, R ₂ is a hydrogen group, R ₃ is a hydrogen group, R ₄ of the polysiloxane is a hydrogen group, and R ₅ is Alkenes

Put the polysilazane and polysiloxane in the reactor, mix the polysilazane and polysiloxane at 400 rpm, add triethylenediamine, and stir at 1250 rpm, To promote the copolymerization of polysiloxane and polysilazane to form polysiloxane-polysilazane copolymer;

After adding dibutyl ether to the copolymer, then add tourmaline and stir at a speed of 1300 rpm to obtain a coating composition;

The coating composition is applied to the surface of the substrate to form a coating layer with a thickness of 65 microns to prepare the coated article.

Example 12

Provide raw materials for preparation, based on mass percentage, the raw materials include: polysilazane 50%, polysiloxane 29%, dibutyl ether 10%, particle size range 0.23 ~ 0.35 microns silicon carbide 5%, particles A tourmaline with a diameter ranging from 0.23 to 0.35 microns is 1%, and triethylenediamine is 5%, wherein R ₁ of the polysilazane is a hydrogen group, R ₂ is a hydrogen group, and R ₃ is a hydrogen group. R ₄ of the polysiloxane is a hydrogen group, and R ₅ is an alkene;

Put the polysilazane and polysiloxane in the reactor, mix the polysilazane and polysiloxane at 220 rpm, add triethylenediamine, and stir at 1200 rpm, To promote the copolymerization of polysiloxane and polysilazane to form polysiloxane-polysilazane copolymer;

After adding dibutyl ether to the copolymer, silicon carbide and tourmaline are added, and stirring is performed at a speed of 1200 rpm to obtain a coating composition;

The coating composition was applied to the surface of the substrate to form a coating layer with a thickness of 70 microns to prepare the coated article.

Example 13

Provide raw materials for preparation, based on mass percentage, the raw materials include: polysilazane 50%, polysiloxane 20%, dibutyl ether 10%, particle size range 0.23 ~ 0.35 microns alumina 5%, particles Wizard stone 8% with a diameter range of 0.23 to 0.35 microns, opal 2% with a particle size range of 0.23 to 0.35 microns, and triethylenediamine 5%, wherein R ₁ of the polysilazane is a hydrogen group, R ₂ is a hydrogen group, R ₃ is a hydrogen group, R ₄ of the polysiloxane is a hydrogen group, and R ₅ is an alkene;

Put polysilazane and polysiloxane in the reactor, mix polysilazane and polysiloxane at 300 rpm, add triethylenediamine, and stir at 1300 rpm, To promote the copolymerization of polysiloxane and polysilazane to form polysiloxane-polysilazane copolymer;

After adding dibutyl ether to the copolymer, then add alumina, wizard stone, and opal, and stir at a speed of 1800 rpm to obtain a coating composition;

The coating composition is applied to the surface of the substrate to form a coating layer with a thickness of 75 μm to prepare the coated article.

Example 14

Provide raw materials for preparation, based on mass percentage, the raw materials for preparation include: polysilazane 50%, polysiloxane 20%, dibutyl ether 10%, particle size range of 2.3 to 3.5 microns silicon carbide 5%, particles Zirconium dioxide 7% with a diameter ranging from 2.3 to 3.5 microns, kiwistone 3% with a particle diameter ranging from 2.3 to 3.5 microns, and triethylenediamine 5%, wherein R ₁ of the polysilazane is hydrogen Group, R ₂ is a hydrogen group, R ₃ is a hydrogen group, R ₄ of the polysiloxane is a hydrogen group, and R ₅ is an alkene;

Place polysilazane and polysiloxane in the reactor, mix polysilazane and polysiloxane at 100 rpm, add dimethyl tin, and stir at 1100 rpm, Promote the copolymerization of polysiloxane and polysilazane to form polysiloxane-polysilazane copolymer;

After adding dibutyl ether to the copolymer, then adding silicon carbide, zirconium dioxide, and strange ice stone, and stirring at a speed of 1100 rpm to obtain the initial coating product;

The primary product is subjected to grinding treatment so that the particle size of silicon carbide, zirconium dioxide, and strange ice stone ranges from 0.2 to 0.3 microns to obtain a coating composition;

The coating composition is applied to the surface of the substrate to form a coating layer with a thickness of 80 microns to prepare the coated article.

Example 15

Provide raw materials for preparation, based on mass percentage, the raw materials include: polysilazane 20%, polysiloxane 15%, p-xylene 4%, manganese dioxide 50%, particle size range of 2 to 3 microns, granules Tourmaline 6% with a diameter range of 2 to 3 microns, Cryolite 3% with a particle size range of 2 to 3 microns, Opal 1% with a particle size range of 2 to 3 microns, and Triethylenediamine 1%, of which , R ₁ of the polysilazane is a hydrogen group, R ₂ is a hydrogen group, R ₃ is a hydrogen group, R ₄ of the polysiloxane is a hydrogen group, and R ₅ is an alkene;

Place polysilazane and polysiloxane in the reactor, mix polysilazane and polysiloxane at 500 rpm, add triethylenediamine, and stir at 1550 rpm, To promote the copolymerization of polysiloxane and polysilazane to form polysiloxane-polysilazane copolymer;

After p-xylene is added to the copolymer, manganese dioxide, tourmaline, opal and strange ice stone are added, and the mixture is stirred at a speed of 1900 rpm to obtain an initial coating product;

The primary product is subjected to grinding treatment so that the particle size of manganese dioxide, tourmaline, opal and strange ice stone ranges from 0.2 to 0.3 microns to obtain a coating composition;

The coating composition is applied to the surface of the substrate to form a coating layer with a thickness of 85 microns to prepare the coated article.

Example 16

Provide raw materials for preparation, based on mass percentage, the raw materials include: polysilazane 25%, polysiloxane 25%, p-xylene 20%, silicon carbide 20% with particle size range of 2 to 3 microns, particle size Tourmaline 5% in the range of 2 to 3 microns, titanium nitride 4% in the particle size range of 2 to 3 microns, and silicon carbide 1% in the particle size range of 2 to 3 microns, wherein the polysilazane R ₁ is a hydrogen group, R ₂ is a hydrogen group, R ₃ is a hydrogen group, R ₄ of the polysiloxane is a hydrogen group, and R ₅ is an alkene;

Place polysilazane and polysiloxane in the reactor, mix polysilazane and polysiloxane at 200 rpm, stir at 1600 rpm, polysiloxane and polysiloxane Copolymerization of azanes to produce polysiloxane-polysilazane copolymer;

After adding p-xylene to the copolymer, then add silicon carbide, tourmaline, titanium nitride, and silicon carbide, and stir at a speed of 1600 rpm to obtain the initial coating product;

Grinding the initial product so that the particle size of silicon carbide, tourmaline, titanium nitride, and silicon carbide ranges from 0.2 to 0.26 micrometers to obtain a coating composition;

The coating composition is applied to the surface of the substrate to form a coating layer with a thickness of 90 microns to prepare the coated article.

The hardness, adhesion, temperature resistance, and negative ion release of the coated parts of Examples 1-16 were tested, and the test results are shown in Table 1.

Table 1 Physical property test results of coated parts

A	硬度(H)Hardness (H)	附着Attach	耐温(失重％)Temperature resistance (weight loss%)	负离子释放量(个/cm ³) Negative ion release (pcs / cm ³ )
实施例1Example 1	88	00	2.342.34	28452845
实施例2Example 2	99	00	1.331.33	27322732
实施例3Example 3	77	00	3.043.04	25772577
实施例4Example 4	77	00	3.253.25	26102610
实施例5Example 5	77	00	2.912.91	33983398
实施例6Example 6	77	00	3.633.63	32113211
实施例7Example 7	66	00	3.783.78	33253325
实施例8Example 8	77	00	3.843.84	31943194
实施例9Example 9	88	00	1.841.84	35183518
实施例10Example 10	99	00	1.491.49	11331133
实施例11Example 11	99	00	1.131.13	731731
实施例12Example 12	99	00	1.301.30	449449
实施例13Example 13	99	00	1.181.18	24362436
实施例14Example 14	99	00	1.051.05	25782578
实施例15Example 15	77	00	2.802.80	26022602
实施例16Example 16	88	00	2.552.55	28552855

According to GB / T 6739-1696 (coating film hardness test method), the hardness of the coated parts of Examples 1-16 was tested, and the hardness of the coated parts ranged from 6 to 9H, indicating that the coating of Examples 1-16 The coverings all have better hardness.

According to GB / T9286 (adhesion test method), the adhesion of the coated parts of Examples 1-16 was tested, which showed that the 100-cell adhesion of each coated part can reach 0, indicating that the coating of Examples 1-16 The adhesion of the covering is also better.

The weight loss of the coated parts of Examples 1-16 was tested according to GB / T 9286 (temperature resistance test method), which showed that the coated parts of Examples 1-16 were also better in temperature resistance.

An air negative ion detector (model MODEL COM-3010PRO) was used to test the negative ion release amount of the coated parts of Examples 1-16. It was shown that the coated articles of Examples 1-16 had a higher amount of negative ion emission.

The above are only optional embodiments of the present application, and therefore do not limit the patent scope of the present application. Any equivalent structural transformations made by using the content of the specification of the present application under the inventive concept of the present application, or directly or indirectly used in other related The technical fields are included in the patent protection scope of this application.

Claims

A coating composition, wherein the raw material for preparing the coating composition includes polysilazane, polysiloxane, and an auxiliary agent, and the auxiliary agent is at least one selected from the group consisting of anion agents, wave absorbers, and far infrared agents Species, where,

The negative ion agent is selected from at least one of strange ice stone, tourmaline, opal, and wizard stone, or the negative ion agent is at least one of strange ice stone, tourmaline, opal, and strange stone and is oxidized with rare earth Compounds and / or rare earth compound salts;

The far infrared agent is selected from at least one of boron nitride, titanium nitride, zirconium nitride, manganese dioxide, and zirconium dioxide, or the far infrared agent is boron nitride, titanium nitride, or zirconium nitride , A mixture of at least one of manganese dioxide and zirconium dioxide and tourmaline;

The wave absorber is at least one selected from silicon carbide, silicon nitride, graphene, zinc oxide, titanium carbide, carbon nanotubes, boron nitride, and titanium nitride.
The coating composition according to claim 1, wherein the mass percentage of the polysilazane in the preparation raw material ranges from 6 to 81%, and the mass percentage of the polysiloxane in the preparation raw material ranges from 4 to 79% The mass percentage of the additive in the preparation raw material ranges from 0.01 to 40%.
The coating composition according to claim 1, wherein the structural formula of the polysilazane is:
Wherein R 1 is hydrogen, alkane, cycloalkane, alkene, aryl, alkoxy, alkylsiloxy, or alkylamine group, R 2 is hydrogen, alkane, cycloalkane, alkene, aryl , Alkoxy, alkylsiloxy, or alkylamino, R 3 is hydrogen, alkane, cycloalkane, alkene, aryl, alkoxy, alkylsiloxy, or alkylamine.
The coating composition according to claim 3, wherein at least one of R 1 and R 2 is a hydrogen group or an alkene.
The coating composition according to claim 1, wherein the structural formula of the polysiloxane is:
Wherein R 4 is hydrogen, alkane, cycloalkane, alkene, aryl, alkoxy, or alkylsiloxy, R 5 is hydrogen, alkane, cycloalkane, alkene, aryl, alkoxy , Or alkylsiloxy.
The coating composition according to any one of claims 1 to 5, wherein the preparation raw material further comprises a solvent, and the solvent accounts for a mass percentage of the preparation raw material in the range of 10 to 66%, and the solvent is selected from At least one of alkane solvents, ether solvents, ketone solvents, and benzene derivative solvents.
The coating composition according to claim 6, wherein the alkane solvent is at least one selected from the group consisting of n-hexane, n-octane, n-decane, chloroform, methylene chloride, dichloroethylene, and mineral oil One or more; the ether solvent is selected from at least one of ether, petroleum ether, and dibutyl ether; the ketone solvent is selected from at least one of acetone, methyl ethyl ketone, cyclohexanone, and isophorone One; the benzene derivative solvent is selected from at least one of toluene, m-xylene, p-xylene, o-xylene, and chlorobenzene.
The coating composition according to any one of claims 1 to 5, wherein the preparation raw material further comprises a catalyst, the catalyst accounts for a mass percentage of the preparation raw material in the range of 0.01 to 5%, and the catalyst is an amine Type catalyst and / or metal type catalyst.
The coating composition according to claim 8, wherein the amine catalyst is one or more selected from fatty amines, alicyclic amines, alcohol amines, and aromatic amines, and the fatty amines are selected from diethyl At least one of amine, triethylamine, and triethylenetetramine; the alicyclic amine is selected from at least one of triethylenediamine, piperazine, piperidine, and morpholine; the alcohol amine At least one selected from N, N-dimethylethanolamine, diisopropanolamine, and N, N-diethylethanolamine; the aromatic amine is selected from aniline, o-phenylenediamine, benzidine, and N , N-dimethylaniline at least one.
The coating composition according to claim 8, wherein the metal catalyst is an organotin catalyst and / or a palladium catalyst, and the organotin catalyst is selected from dibutyltin dilaurate, stannous octoate, and dimethyl At least one of tin and triphenyltin; the palladium catalyst is selected from at least one of carbon / palladium, palladium chloride, palladium propionate salt, palladium acetate salt, and triphenylphosphine palladium.
The coating composition according to any one of claims 1 to 5, wherein the preparation raw material further includes a filler, and the filler accounts for a mass percentage of the preparation raw material in the range of 1 to 50%, 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 coating composition according to claim 2, wherein the preparation raw material further includes a filler, a solvent and a catalyst, the filler accounts for a mass percentage of the preparation raw material in the range of 1 to 50%, and the solvent accounts for the The mass percentage of the prepared raw material ranges from 10 to 66%, the mass percentage of the catalyst to the prepared raw material ranges from 0.01 to 5%, and the polysiloxane and polysilazane account for the mass of the prepared raw material The percentage ranges from 10 to 80%.
The coating composition according to claim 2, wherein the auxiliary agent is a negative ion agent, and the mass percentage of the negative ion agent in the preparation raw material ranges from 0.01 to 15%; or

The auxiliary agent is a far-infrared agent, and the far-infrared agent accounts for 0.01% to 15% of the mass percentage of the prepared raw material; or

The auxiliary agent is a wave-absorbing agent, and the range of the mass percentage of the wave-absorbing agent in the prepared raw material is 0.01-10%.
The coating composition according to claim 2, wherein the auxiliary agent is a negative ion agent and a far-infrared agent, the negative ion agent accounts for 0.01% to 15% of the mass percentage of the prepared raw material, and the far-infrared agent The range of the mass percentage of the prepared raw material is 0.01-15%; or

The auxiliary agent is an anion agent and a wave absorbing agent. The mass percentage of the anion agent in the preparation raw material ranges from 0.01 to 15%, and the range of the mass percentage of the absorbing agent in the preparation raw material is 0.01 to 10%; or

The auxiliary agent is a far-infrared agent and a wave-absorbing agent. The far-infrared agent accounts for 0.01% to 15% of the mass of the prepared raw material, and the wave-absorbing agent accounts for the mass percentage of the prepared raw material. 0.01 ～ 10%.
The coating composition according to claim 2, wherein the auxiliary agent is an anion agent, a far-infrared agent, and a wave absorber, and the anion agent accounts for 0.01% to 15% of the mass percentage of the prepared raw material. The range of the mass percentage of the far-infrared agent in the preparation raw material is 0.01 to 15%, and the range of the mass percentage of the wave-absorbing agent in the preparation raw material is 0.01 to 10%.
A method for preparing a coating composition includes the following steps:

Provide polysilazane, polysiloxane and auxiliary agent, the auxiliary agent is selected from at least one of negative ion agent, wave absorber and far infrared agent, wherein the negative ion agent is selected from strange ice stone, tourmaline , At least one of opal, and wizard stone, or the negative ion agent is a mixture of at least one of strange ice, tourmaline, opal, and wizard stone with rare earth oxide and / or rare earth composite salt; The far infrared agent is selected from at least one of boron nitride, titanium nitride, zirconium nitride, manganese dioxide, and zirconium dioxide, or the far infrared agent is boron nitride, titanium nitride, zirconium nitride, or A mixture of at least one of manganese oxide and zirconium dioxide and tourmaline; the wave absorber is selected from silicon carbide, silicon nitride, graphene, zinc oxide, titanium carbide, carbon nanotubes, boron nitride, and nitrogen At least one of titanium oxide;

Mixing polysilazane and polysiloxane, copolymerization reaction of polysilazane and polysiloxane to produce polysilazane-polysiloxane copolymer;

An auxiliary agent is added to the polysilazane-polysiloxane copolymer to prepare the coating composition.
A coated article comprising a substrate and a coating layer formed on the surface of the substrate, the coating layer containing the coating composition according to any one of claims 1-15.
The coated article according to claim 17, wherein the thickness of the coating layer ranges from 1 micrometer to 100 micrometers.
A method for preparing a coated part includes the following steps:

Providing a substrate and the coating composition according to any one of claims 1-15;

The coating composition is applied to the surface of the substrate to form a coating, and the coated article is prepared.
A household appliance, wherein the household appliance includes the coated article according to any one of claims 17-18.