Polyether sulfone coating material, coating, preparation method of coating and cooking utensil

Abstract

The invention discloses a polyethersulfone coating material, a coating, a preparation method of the coating and a cooking utensil, and belongs to the field of kitchen ware. The polyethersulfone coating material comprises a component A and a component B, the component A comprises a polyethersulfone aqueous emulsion, a pigment, a filler, an auxiliary agent and deionized water, and the component B comprises silica sol, a silane composition, a silane coupling agent, a pH regulator, a non-stick auxiliary agent, fumed silica and deionized water. According to the polyethersulfone coating material provided by the invention, the non-stick additive organic silicon and the wear-resistant filler are introduced into a polyethersulfone system, so that the hardness, the wear resistance, the high-temperature stability and the fluoride-free safety of a non-stick coating are improved.

Description

Technical Field

[0001] This invention relates to the field of kitchenware, specifically to a polyethersulfone coating material, a coating, a method for preparing the same, and cooking utensils. Background Technology

[0002] Non-stick properties are achieved by creating a surface with low surface tension. When a pan is heated, cooking oil is added and heated to cross-link and solidify, forming an oil film similar to a coating. This oil film is not easily detached even with continued heating. When the oil is reheated, it enters a low surface tension state, thus exhibiting non-stick properties.

[0003] Teflon coatings are commonly used non-stick coatings on cooking utensils. Their main component is polytetrafluoroethylene (PTFE) resin. They are widely used due to their high temperature resistance, acid and alkali resistance, and very low surface tension. However, they decompose at temperatures exceeding 260°C, releasing polymer fumes that produce substances toxic to humans. Furthermore, their coating has low hardness, making them easily damaged and causing them to lose their protective and non-stick properties. Currently, there is a lack of a fluorine-free, high-hardness, and wear-resistant non-stick coating material. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention proposes a polyethersulfone coating material, a coating, a preparation method thereof, and a cooking utensil, aiming to solve the problem of the current lack of a non-stick coating material that is fluorine-free, has high hardness, and is wear-resistant.

[0005] To achieve the above objectives, the present invention proposes a polyethersulfone coating material, which includes component A and component B. Component A includes: polyethersulfone aqueous emulsion, pigment, filler, additives and deionized water. Component B includes: silica sol, silane composition, silane coupling agent, pH adjuster, non-sticking agent, fumed silica and deionized water.

[0006] Optionally, by weight percentage, component A comprises: 5%–40% polyethersulfone aqueous emulsion, 10%–15% pigment, 1%–20% filler, 1%–15% additives, and 20%–40% deionized water; component B comprises: 20%–50% silica sol, 20%–50% silane composition, 0.5%–3% silane coupling agent, 2%–8% pH adjuster, 1%–5% non-sticking agent, 0.1%–1% fumed silica, and 20%–30% deionized water.

[0007] Optionally, the mass ratio of component A to component B is 1:(0.1 to 1).

[0008] Optionally, the filler includes at least one of alumina, silicon carbide, boron carbide, zirconium dioxide, aluminum nitride, and silicon nitride.

[0009] Optionally, the additives include at least one of alcohol solvents, low molecular weight unsaturated polycarboxylic acid polymer solutions, silane coupling agents, polyether-modified polysiloxanes, polysiloxane solutions, and hydroxyethyl cellulose.

[0010] Optionally, the mass ratio of silicon dioxide in the silica sol is 30% to 50%, and the particle size of the silicon dioxide is 10 nm to 50 nm.

[0011] Optionally, the non-stick additive is selected from any two of the following: polydimethylsiloxane composite, polyphenylmethylsiloxane, amino-modified polysiloxane, polyether-modified polysiloxane, polyester-modified polysiloxane, epoxy-modified polysiloxane, and acrylic-modified polysiloxane.

[0012] To achieve the above objectives, the present invention proposes a coating comprising the aforementioned polyethersulfone coating material.

[0013] To achieve the above objectives, the present invention proposes a method for preparing the above-mentioned coating, comprising the following steps:

[0014] Pigments, fillers, additives and deionized water are mixed and ground, and then polyethersulfone emulsion is added and stirred to obtain component A slurry;

[0015] The silane composition, silane coupling agent, non-sticking agent, fumed silica, pH adjuster and deionized water are mixed and stirred, then silica sol is added, and the mixture is heated and kept at a constant temperature to obtain component B slurry.

[0016] The A component slurry and the B component slurry are stirred to obtain a polyethersulfone coating material;

[0017] The pretreated cookware substrate is preheated, and then polyethersulfone coating material is sprayed onto the surface of the cookware substrate and baked to cure, thus obtaining the coating.

[0018] Optionally, in the step of "mixing pigments, fillers, additives and deionized water and then grinding", the grinding is to grind until the fineness of the solid particles is less than 20 μm.

[0019] Optionally, in the step of "mixing and stirring the silane composition, silane coupling agent, non-sticking agent, fumed silica, pH adjuster and deionized water, then adding silica sol, and reacting at a constant temperature after heating", the temperature range after heating is 50℃~80℃, and the reaction time at a constant temperature is 1h~2h.

[0020] Optionally, in the step of "stirring the A component slurry and the B component slurry", the stirring is carried out at a constant stirring speed of 100 r / min to 200 r / min for 13 min to 17 min.

[0021] To achieve the above objectives, the present invention provides a cooking utensil comprising the above-described coating, or comprising a coating prepared by the above-described preparation method.

[0022] The polyethersulfone coating material of the present invention utilizes the excellent heat resistance, chemical stability, oxidation resistance, flame retardancy, and excellent adhesion to metal of polyethersulfone resin as the main film-forming substance of the coating material. Through the sol-gel method, the organosilicon component of the non-sticking agent is incorporated into the spatial structure of polyethersulfone, and then fillers with high hardness, wear resistance, and high temperature resistance are added and dispersed in the spatial structure, so that the prepared coating has the advantages of high hardness, wear resistance, and high temperature stability. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a flowchart illustrating the preparation process of a coating according to an embodiment of the present invention;

[0025] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. It should be understood that the following embodiments are only used to explain the present invention and are not intended to limit the present invention.

[0027] Unless otherwise specified, all technical and scientific terms used herein have their usual meaning in the field to which the claimed subject matter pertains, and all reagents used are of industrial or analytical purity.

[0028] The "range" disclosed in this application is defined by a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, which define the boundaries of a particular range. Ranges defined in this way can include or exclude endpoints and can be arbitrarily combined; that is, any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60-120 and 80-110 are listed for a specific parameter, it is expected that ranges of 60-110 and 80-120 are also included. Furthermore, if minimum range values ​​of 1 and 2 are listed, and if maximum range values ​​of 3, 4, and 5 are listed, then the following ranges are all expected: 1-3, 1-4, 1-5, 2-3, 2-4, and 2-5. In this application, unless otherwise stated, the numerical range "ab" represents a shortened representation of any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0-5" indicates that all real numbers between "0-5" have been listed in this article; "0-5" is simply a shortened representation of these numerical combinations. Furthermore, when a parameter is stated as an integer ≥2, it is equivalent to disclosing that the parameter is, for example, an integer such as 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0029] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0030] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0031] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0032] Non-stick properties are achieved by creating a low surface tension surface. When a pan is heated, cooking oil is added and heated to cross-link and solidify, forming an oil film similar to a coating. Continued heating prevents this film from easily peeling off. Reheating the oil further reduces its surface tension, resulting in non-stick properties. Teflon coatings are commonly used non-stick coatings on cooking utensils. Their main component is polytetrafluoroethylene (PTFE) resin. They are widely used due to their high temperature resistance, acid and alkali resistance, and very low surface tension. However, at temperatures exceeding 260°C, they decompose, releasing polymer fumes that produce substances toxic to humans. Additionally, their coating has low hardness, making them easily damaged and causing them to lose their protective and non-stick properties.

[0033] However, there is currently a lack of a non-stick coating material that is fluorine-free, has high hardness, and is wear-resistant.

[0034] To address the aforementioned problems, this invention proposes a polyethersulfone coating material comprising component A and component B. Component A comprises: a polyethersulfone aqueous emulsion, pigments, fillers, additives, and deionized water. Component B comprises: silica sol, a silane composition, a silane coupling agent, a pH adjuster, a non-sticking agent, fumed silica, and deionized water.

[0035] In this scheme, the coating slurry is divided into component A and component B. Component A is the main film-forming component and pigments and fillers, while component B is an organosilicon resin including various silicon raw materials. The separate storage and mixing of components A and B can control the rate of chemical reaction. Through the sol-gel method, the organosilicon component of the non-stick additive is incorporated into the spatial structure of polyethersulfone. Then, fillers with high hardness, wear resistance, and high temperature resistance are added and dispersed in the spatial structure. After immediate mixing, the coating is applied, which can ensure the quality and uniformity of the coating.

[0036] Utilizing the excellent heat resistance, chemical stability, oxidation resistance, radiation resistance, water vapor resistance, flame retardancy, and excellent adhesion to metals of polyethersulfone resin, it is used as the main material of polyethersulfone coating material. The polyethersulfone chains are cross-linked and polymerized with the active groups of the non-stick additive organosilicon to form an interconnected and entangled three-dimensional network structure, which gives the polyethersulfone coating excellent non-stick properties. Then, fillers with high hardness, wear resistance, and high temperature resistance are added and dispersed in the three-dimensional structure, so that the prepared coating has the advantages of high hardness, wear resistance, and high temperature stability.

[0037] Silica sol is a dispersion of nano-sized silica particles in water or solvent, also described as SiO2·nH2O. Its molecules have silane structures and a certain amount of hydroxyl structures on the surface. When the solid content is less than 50%, it can be mixed with water in any proportion. When used in the coating of this solution, silica sol provides good wettability, low slurry viscosity, short dripping time, high strength, and high gloss. Silane is an organic compound containing silicon and hydrogen, with the general formula SiO2. n H 2n+2 Various silanes, silane coupling agents, and non-sticking agents participate in the cross-linking of the coating's molecular framework. In some embodiments, the silica sol is sodium silicate or ammonium silicate.

[0038] In some embodiments of this scheme, the silane composition is one or more of methyltrimethoxysiloxane, methyltriethoxysiloxane, ethyltrimethoxysiloxane, vinyltrimethoxysilane, dimethyldiethoxysilane, dimethyldimethoxysilane, methylphenyldimethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, vinyltriethoxysilane, phenyltrimethoxysilane, and phenyltriethoxysilane.

[0039] In some embodiments, the silane coupling agent is selected from one of KH550, KH560, KH570, KH792, DL602, and DL171.

[0040] The pigment in component A is used to give the non-stick pan a specific color and texture, and also has certain ultraviolet absorption or antioxidant properties, which help protect the coating and extend the life of the non-stick pan. In some embodiments, the pigment is selected from at least one of titanium dioxide, iron oxide red, titanium yellow, cobalt blue, copper chromium black, and carbon black.

[0041] Further, by mass percentage, component A comprises: 5%–40% polyethersulfone aqueous emulsion, 10%–15% pigment, 1%–20% filler, 1%–15% additives, and 20%–40% deionized water; component B comprises: 20%–50% silica sol, 20%–50% silane composition, 0.5%–3% silane coupling agent, 2%–8% pH adjuster, 1%–5% non-sticking agent, 0.1%–1% fumed silica, and 20%–30% deionized water.

[0042] In some embodiments, the polyethersulfone aqueous emulsion is any value from 5% to 40%, such as 5%, 10%, 15%, 20%, 25%, 30%, 35%, and 40%. In some embodiments, the pigment is any value from 10% to 15%, such as 10%, 12.5%, and 15%. In some embodiments, the filler is any value from 1% to 20%, such as 1%, 5%, 10%, 15%, and 20%. In some embodiments, the additive is any value from 1% to 15%, such as 1%, 10%, and 15%. In some embodiments, the silica sol is any value from 20% to 50%, such as 20%, 25%, 30%, 35%, 40%, 45%, and 50%. In some embodiments, the silane composition is any value from 20% to 50%, such as 20%, 25%, 30%, 35%, 40%, 45%, 50%, etc. In some embodiments, the silane coupling agent is any value from 0.5% to 3%, such as 0.5%, 1%, 2%, 3%, etc. In some embodiments, the non-sticking agent is any value from 1% to 5%, such as 1%, 3%, 5%, etc. In some embodiments, the fumed silica is any value from 0.1% to 1%, such as 0.1%, 0.5%, 1%, etc.

[0043] In some embodiments, deionized water improves the fluidity of the material, making it easier for the polyethersulfone coating material to be applied to the surface of cooking utensils through processes such as spraying.

[0044] Further, the mass ratio of component A to component B is 1:(0.1~1). In the crosslinking reaction of polyethersulfone and organosilicon, the component ratio affects the reaction, and different component ratios lead to different degrees of crosslinking and product properties. Under the formulation of this scheme, a higher crosslinking density of the polyethersulfone coating material increases the material's hardness, strength, and solvent resistance; a lower crosslinking density gives the material better flexibility. At the same time, changes in crosslinking density affect the material's heat resistance and chemical resistance, which is beneficial to improving the overall stability of the coating performance.

[0045] In some embodiments, the mass ratio of component A to component B in the polyethersulfone coating material is any value from 1:0.1, 1:0.5, 1:1, etc., within the range of 1:(0.1 to 1). Preferably, the mass ratio of component A to component B is 1:(0.3 to 0.7). More preferably, the mass ratio of component A to component B is 0.6:0.4.

[0046] Furthermore, the filler includes at least one of alumina, silicon carbide, boron carbide, zirconium dioxide, aluminum nitride, and silicon nitride. The selected wear-resistant particles have high hardness, wear resistance, and high temperature resistance; during use, wear on the non-stick coating of cookware can affect its non-stick properties. Adding wear-resistant particles can not only increase the wear resistance of the polyethersulfone coating, but also indirectly enhance the non-stick durability of the coating.

[0047] Furthermore, the additives include at least one of alcohol solvents, low molecular weight unsaturated polycarboxylic acid polymer solutions, silane coupling agents, polyether-modified polysiloxanes, polysiloxane solutions, and hydroxyethyl cellulose.

[0048] Additives are used to improve various properties of coatings and promote film formation. In some embodiments, additives also include driers, toughening agents, emulsifiers, thickeners, defoamers, leveling agents, anti-skinning agents, matting agents, light stabilizers, mildew inhibitors, antistatic agents, etc.

[0049] Furthermore, the silica in the silica sol accounts for 30% to 50% by mass, and the silica particle size is 10 nm to 50 nm. The particle size of the silica sol has a significant impact on the density of the coating. Coatings prepared from silica sol with smaller particle size have higher gloss and better wear resistance because small-particle-size silica sol has a larger surface area, thicker film, stronger interparticle bonding, and forms a denser and stronger coating.

[0050] Furthermore, the non-stick additive is selected from any two of the following: polydimethylsiloxane composite, polyphenylmethylsiloxane, amino-modified polysiloxane, polyether-modified polysiloxane, polyester-modified polysiloxane, epoxy-modified polysiloxane, and acrylic-modified polysiloxane.

[0051] In some embodiments, the two non-stick additives are blended in a 1:1 mass ratio to form a gradient of two non-stick additives. Even if the surface non-stick additive is lost or destroyed, the bottom non-stick additive can still function, and this structure can significantly improve the non-stick durability of the coating. Some of the active functional groups in the non-stick additives can participate in the cross-linking reaction of the coating, thus also providing a long-lasting smooth and non-stick effect, and providing the coating with better gloss, smoothness and smoothness.

[0052] To address the aforementioned problems, this invention proposes a coating comprising the aforementioned polyethersulfone coating material. The coating in this solution, based on the polyethersulfone coating material, possesses excellent wear resistance and non-stick properties, making it suitable for application on cooking appliances such as frying pans, woks, electric pressure cookers, rice cookers, grills, baking pans, automatic stir-fry machines, saucepans, air fryers, or electric griddles. The coating can be a single coating on the cooking appliance, or it can be one layer of a non-stick coating on the cooking appliance; both scenarios achieve the beneficial effects of the coating proposed in this solution.

[0053] To address the above problems, this invention proposes a method for preparing the aforementioned coating, comprising the following steps:

[0054] S1: After mixing and grinding pigments, fillers, additives and deionized water, polyethersulfone emulsion is added and stirred to obtain component A slurry;

[0055] S2: Mix and stir the silane composition, silane coupling agent, non-sticking agent, fumed silica, pH adjuster and deionized water, then add silica sol, heat and react at a constant temperature to obtain component B slurry;

[0056] S3: Stir the A component slurry and the B component slurry to obtain a polyethersulfone coating material;

[0057] S4: Preheat the pretreated cookware substrate, then spray the polyethersulfone coating material onto the surface of the cookware substrate, and bake to cure to obtain the coating.

[0058] In this solution, the polyethersulfone coating material is blown into a mist by airflow and adheres to the surface of the object. The working method of the coating being pressed or sucked out of the container by external force and forming a mist that adheres to the surface of the object is called spraying. Spraying can make the coating more uniform. It is more efficient than manual brushing when applied to uneven surfaces, and the coating film is smooth and beautiful.

[0059] Furthermore, in the step of "mixing pigments, fillers, additives, and deionized water and then grinding," the grinding is performed until the fineness of the solid particles is less than 20 μm. Grinding promotes a more uniform particle size distribution of the solid particles, and within the aforementioned fineness range, it facilitates the dispersion of solid particles in the cross-linked network.

[0060] Furthermore, in the step of "mixing and stirring the silane composition, silane coupling agent, non-sticking agent, fumed silica, pH adjuster, and deionized water, then adding the silica sol, and reacting at a constant temperature after heating," the temperature range after heating is 50℃ to 80℃, and the reaction time at a constant temperature is 1h to 2h. In this scheme, the silane coupling agent can better exert its coupling effect at the above-mentioned temperature. Temperatures that are too high or too low may lead to side reactions, affecting the quality and yield of the product. In some embodiments, the temperature range after heating is any value within the range of 50℃ to 80℃, such as 50℃, 60℃, 70℃, or 80℃.

[0061] Furthermore, in the step of "stirring the A component slurry and the B component slurry", the stirring is carried out at a constant stirring speed of 100 r / min to 200 r / min for 13 min to 17 min.

[0062] In this method, stirring ensures that all components are uniformly distributed in the solution, thereby improving the uniformity of the reaction and helping to control the gel formation process. Higher stirring speeds may result in smaller gel particle sizes, while lower stirring speeds may produce larger gel particles. The stirring speeds mentioned above do not damage or affect the structure and properties of the gel, resulting in a more uniform target gel.

[0063] In some embodiments, the stirring speed is any integer value from 100 rpm to 200 rpm, such as 100 rpm, 120 rpm, 140 rpm, 160 rpm, 180 rpm, 200 rpm, etc.

[0064] To address the aforementioned problems, this invention proposes a cooking utensil comprising a cookware substrate and a non-stick coating. The non-stick coating includes, or may include, the coating prepared by the aforementioned method. The cooking utensil includes, but is not limited to, frying pans, woks, electric pressure cookers, rice cookers, grills, baking pans, automatic stir-fry machines, saucepans, air fryers, or electric griddles.

[0065] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0066] Example 1:

[0067] By weight percentage, a mixture of 10% pigment, 15% alumina, 5% hydroxyethyl cellulose, and 30% deionized water is ground to a fineness of <20μm and then 40% polyethersulfone emulsion is added and stirred thoroughly to obtain component A slurry.

[0068] By mass percentage, 30% of a silane composition (1:1 methyltrimethoxysiloxane and vinyltriethoxysilane), 2% of KH550, 5% of a non-sticking agent (1:1 polyether-modified polysiloxane and acrylic acid-modified polysiloxane), 0.5% of fumed silica, 6% of a pH adjuster, and 26% of deionized water were mixed and stirred. Then, 30% of silica sol was added, the temperature was raised to 70°C, and the reaction was maintained at this temperature for 1.5 hours to obtain component B slurry. The silica sol contained 40 wt% silica, and the silica particle size was 50 nm.

[0069] S3: Mix component A slurry and component B slurry at a mass ratio of 1:1 to obtain polyethersulfone coating material; control the stirring speed at 100-200 r / min and stir at a constant speed for 15 min;

[0070] S4: Preheat the pretreated cookware substrate, then spray the polyethersulfone coating material onto the surface of the cookware substrate, and bake to cure to obtain the coating.

[0071] Examples 2-5

[0072] The method for preparing the polyethersulfone coating material is the same as in Example 1, except that:

[0073] The silane composition in Example 2 is vinyltrimethoxysilane, and the non-sticking agent is a 1:1 mixture of polyphenylmethylsiloxane and amino-modified polysiloxane.

[0074] The silane composition in Example 3 is dimethyldimethoxysilane, and the non-sticking agent is a 1:1 polydimethylsiloxane composite and an epoxy-modified polysiloxane.

[0075] The filler in Example 4 was silicon nitride;

[0076] The silica sol in Example 5 contained 30% silica by mass.

[0077] For details on the differences in the component ratios in Examples 2-5, please refer to Table 1. Parameters of polyethersulfone coating material.

[0078] Furthermore, the microstructure and thickness of the coatings prepared in the examples and comparative examples were characterized, and the non-stick properties, wear resistance, and high-temperature stability of the coatings were tested using the following methods:

[0079] (1) Conduct a non-stick test for fried eggs.

[0080] Referring to standard GB / T 32095.1~3-2015 "Performance and Test Specification of Non-stick Surface of Household Food Metal Cooking Utensils", the non-stick coating surface of the sample was lightly wiped with a soft cloth dampened with vegetable oil, washed with warm water above 60℃ and detergent, dried, and then subjected to a frying egg test to determine the quality of the non-stick pan's non-stick properties. After the frying egg non-stick test, the results were rated by checking the adhesion between the fried egg and the pan.

[0081] (2) Abrasion resistance: The abrasion resistance of the coating is evaluated by rubbing the coating surface back and forth with a certain force and frequency using 0000 steel wool, rubbing the coating surface with a fixed pressure and frequency until the coating is damaged and peeled off, and then recording the number of rubbings.

[0082] (3) Constant temperature heating test: Place the non-stick pan at 300℃ for 24 hours, and then observe whether the coating has cracks, deformation, etc.

[0083] The test results are shown in Table 2 below.

[0084] Table 1. Polyethersulfone coating material parameters

[0085]

[0086] Table 2. Performance Test Results

[0087]

[0088]

[0089] By comparing the performance data in Table 2, the non-stickiness ratings of Examples 1, 2, 3, 4, and 5 were all either level 1 or 2, indicating that all coatings exhibited good non-stick properties in the egg-frying test. Level 1 is the highest non-stickiness rating, while level 2 is slightly lower but still represents excellent non-stickiness. Example 5 had the highest abrasion resistance, reaching 5000 cycles, indicating that its coating has excellent abrasion resistance. Examples 1, 2, and 3 showed good abrasion resistance, but slightly lower than Examples 1 and 5. Example 4 had the lowest abrasion resistance at 3000 cycles, which may be due to the high water content of component B, which has an adverse effect on abrasion resistance.

[0090] After being placed at 300°C for 24 hours, the coatings in all examples remained smooth and flat without discoloration, indicating that the prepared coatings all have good high-temperature stability.

[0091] The above data demonstrates that the polyethersulfone coating material provided by this invention utilizes the excellent heat resistance, chemical stability, oxidation resistance, flame retardancy, and excellent adhesion to metals of polyethersulfone resin as the main film-forming substance. Through the sol-gel method, the organosilicon component of the non-stick additive is incorporated into the spatial structure of polyethersulfone, and then fillers with high hardness, wear resistance, and high temperature resistance are added and dispersed in the spatial structure, so that the prepared coating has the advantages of high hardness, wear resistance, and high temperature stability.

[0092] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the patent protection scope of the present invention.

Claims

1. A polyether sulfone coating material, characterized by, The polyether sulfone coating material comprises an A component and a B component, the A component comprises: polyether sulfone aqueous emulsion, pigment, filler, auxiliary agent and deionized water, the B component comprises: silica sol, silane composition, silane coupling agent, pH regulator, non-stick auxiliary agent, fumed silica and deionized water.

2. The polyethersulfone coating material of claim 1, wherein, In mass percentage, The A component comprises: polyether sulfone aqueous emulsion 5%-40%, pigment 10%-15%, filler 1%-20%, auxiliary agent 1%-15% and deionized water 20%-40%; The B component comprises: silica sol 20%-50%, silane composition 20%-50%, silane coupling agent 0.5%-3%, pH regulator 2%-8%, non-stick auxiliary agent 1%-5%, fumed silica 0.1%-1% and deionized water 20%-30%.

3. The polyethersulfone coating material of claim 1, wherein, The mass ratio of the A component to the B component is 1:(0.1-1).

4. The polyethersulfone coating material of claim 1, wherein, The filler comprises at least one of alumina, silicon carbide, boron carbide, zirconium dioxide, aluminum nitride and silicon nitride.

5. The polyethersulfone coating material of claim 1, wherein, The auxiliary agent comprises at least one of alcohol solvent, low molecular weight unsaturated polycarboxylic acid polymer solution, silane coupling agent, polyether modified polysiloxane, polysiloxane solution and hydroxyethyl cellulose.

6. The polyethersulfone coating material of claim 1, wherein, The mass ratio of silica in the silica sol is 30%-50%, and the particle size of the silica is 10nm-50nm.

7. The polyethersulfone coating material of claim 1, wherein, The non-stick auxiliary agent is selected from any two of polydimethylsiloxane complex, polyphenylmethylsiloxane, amino-modified polysiloxane, polyether-modified polysiloxane, polyester-modified polysiloxane, epoxy-modified polysiloxane and acrylic-modified polysiloxane.

8. A coating characterized in that, The polyether sulfone coating material comprises the polyether sulfone coating material according to any one of claims 1-7.

9. A method of producing a coating as claimed in claim 8, characterised in that, The method comprises the following steps: The pigment, filler, auxiliary agent and deionized water are mixed and ground, then the polyether sulfone emulsion is added and stirred to obtain an A component slurry; The silane composition, silane coupling agent, non-stick auxiliary agent, fumed silica, pH regulator and deionized water are mixed and stirred, then the silica sol is added, heated and reacted at constant temperature to obtain a B component slurry; The A component slurry and the B component slurry are stirred to obtain the polyether sulfone coating material; The polyether sulfone coating material is sprayed on the surface of a pot body, baked and cured to obtain a coating.

10. The method of claim 9, wherein the coating is prepared by In the step of "mixing and grinding the pigment, filler, auxiliary agent and deionized water", the grinding is to a fineness of less than 20μm of solid particles.

11. The method of claim 9, wherein the coating is prepared by a method comprising: In the step of "mixing and stirring the silane composition, silane coupling agent, non-stick auxiliary agent, fumed silica, pH regulator and deionized water, then adding the silica sol, heating and reacting at constant temperature", the temperature after heating ranges from 50℃ to 80℃, and the time for constant temperature reaction is 1h-2h.

12. The method of claim 9, wherein the coating is prepared by a method comprising: In the step of "stirring the A component slurry and the B component slurry", the stirring is constant speed stirring reaction at a stirring speed of 100r / min-200r / min for 13min-17min.

13. A cooking appliance characterized by, The coating comprises the coating according to claim 8, or is prepared by the method according to any one of claims 9-12.

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