CN116004049B

CN116004049B - Modified ceramic coating and preparation method thereof, composite coating and preparation method thereof, and cooker

Info

Publication number: CN116004049B
Application number: CN202211714438.7A
Authority: CN
Inventors: 张明; 瞿义生
Original assignee: Wuhan Supor Cookware Co Ltd
Current assignee: Wuhan Supor Cookware Co Ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2024-03-08
Anticipated expiration: 2042-12-27
Also published as: CN116004049A

Abstract

The application provides a modified ceramic coating and a preparation method thereof, a composite coating and a preparation method thereof and a cooker. The modified ceramic coating comprises a modified base oil, wherein the modified base oil comprises a base oil and polysulfone resin particles dispersed in the base oil, and the mass fraction of the polysulfone resin particles in the modified base oil is 3% -6%. According to the present application, a permanently non-tacky coating can be formed by modifying the ceramic coating.

Description

Modified ceramic coating and preparation method thereof, composite coating and preparation method thereof, and cooker

Technical Field

The application relates to the technical field of non-sticking of kitchen equipment, in particular to a modified ceramic coating and a preparation method thereof, a composite coating and a preparation method thereof, and a cooker.

Background

In the prior art, ceramic paint is generally used to spray on the surface of a substrate to form a coating with a non-stick effect. Whereas the non-stick lifetime of a coating formed from a ceramic coating is typically not more than 3 months, it is difficult to meet the user's requirement for non-stick properties, thus resulting in a greatly reduced use experience. The ceramic coating is easy to construct, and the manufacturing cost can be saved to a great extent. For this reason, the increase in the permanent non-tackiness of ceramic coatings would be a problem that requires continued attention in the field of pot manufacturing.

Disclosure of Invention

Therefore, the purpose of the application is to provide a modified ceramic coating and a preparation method thereof, a composite coating and a preparation method thereof and a cooker, so as to solve the problem that the coating formed by the ceramic coating in the prior art is durable and not good in adhesion performance.

According to a first aspect of the present application, there is provided a modified ceramic coating material comprising a modified base oil, the modified base oil comprising a base oil and polysulfone resin particles dispersed in the base oil, the mass fraction of polysulfone resin particles in the modified base oil being 3% -6%.

In some embodiments, the modified ceramic coating further comprises a modified topcoat comprising a topcoat and a hydrophobic calcium carbonate material dispersed in the topcoat, the mass fraction of hydrophobic calcium carbonate material in the modified topcoat being from 5% to 30%.

In other embodiments, the modified ceramic coating further comprises a modified topcoat comprising a topcoat and a lipophilic calcium carbonate material dispersed in the topcoat, the mass fraction of lipophilic calcium carbonate material in the modified topcoat being from 10% to 30%.

In an embodiment, the polysulfone resin particles have a particle size of 1 μm to 20 μm.

According to a second aspect of the present application, there is provided a method for preparing a modified ceramic paint, the modified ceramic paint including a modified base oil, the step of preparing the modified base oil including: providing polysulfone resin particles and a base oil; and mixing the polysulfone resin particles and the base oil for a predetermined time to prepare the modified base oil, wherein the mass fraction of the polysulfone resin particles in the modified base oil is 3% -6%.

In some embodiments, the modified ceramic coating further comprises a modified topcoat oil, the step of preparing the modified topcoat oil comprising: providing a hydrophobic calcium carbonate material and a cured flour oil; mixing the hydrophobic calcium carbonate material and the cured flour oil for a preset time to prepare the modified flour oil, wherein the mass fraction of the hydrophobic calcium carbonate material in the modified flour oil is 5% -30%.

In other embodiments, the modified ceramic coating further comprises a modified topcoat, the step of preparing the modified topcoat comprising: providing a first coating comprising a methyl siloxane-based monomer; providing a second coating, the second coating comprising silicic acid species; providing a lipophilic calcium carbonate material; mixing the lipophilic calcium carbonate material and the first coating material, thereby obtaining a dispersion of the lipophilic calcium carbonate material dispersed in the first coating material; and mixing the second coating with the dispersion liquid for a preset time to prepare modified surface oil comprising surface oil and lipophilic calcium carbonate material dispersed in the surface oil, wherein the mass fraction of the lipophilic calcium carbonate material in the modified surface oil is 10% -30%.

According to a third aspect of the present application, there is provided a composite coating layer comprising a base oil layer having a roughened structure formed by a modified base oil in a modified ceramic coating material and a surface oil layer provided on the base oil layer, at least a partial region of the surface oil layer being located in a recess of the roughened structure, the modified ceramic coating material being the modified ceramic coating material provided according to the above-described respective embodiments or the modified ceramic coating material produced according to the method of producing a modified ceramic coating material provided according to the above-described respective embodiments.

In an embodiment, the peak spacing between adjacent protrusions of the roughness structure is 10 μm-30 μm, and the height of the protrusions is 10 μm-20 μm.

In some embodiments, the surface oil layer is formed by modified surface oil, the surface oil layer comprises a first sub-layer with a concave-convex structure on the surface, the first sub-layer comprises a plurality of convex hulls formed by gathering hydrophobic calcium carbonate materials in the modified surface oil, and a first non-stick layer at least distributed on the surfaces of the convex hulls, and at least part of the area of the first non-stick layer is positioned in the concave parts of the convex hulls.

In an embodiment, the surface oil layer further comprises a second sub-layer arranged outside the first sub-layer, the second sub-layer comprises a second non-adhesive layer and hydrophobic calcium carbonate material filled in the second non-adhesive layer, wherein at least part of the area of the second sub-layer is located in the concave-convex structure of the first sub-layer.

In other embodiments, the topcoat layer is formed from a modified topcoat, the topcoat layer including a non-stick coating and a lipophilic calcium carbonate material filled in the non-stick coating.

According to a fourth aspect of the present application, there is provided a method of manufacturing a composite coating, the method of manufacturing a composite coating comprising the steps of: providing a modified base oil; spraying the modified base oil to form a base oil layer with a rough structure on the surface; and spraying surface oil on the bottom oil layer to form the composite coating with the surface oil layer, wherein at least part of the surface oil layer is positioned at the concave part of the coarse structure, and the modified ceramic coating is the modified bottom oil in the modified ceramic coating provided according to the various embodiments or the modified bottom oil in the modified ceramic coating prepared by the method for preparing the modified ceramic coating provided according to the various embodiments.

In an embodiment, the step of spraying with the modified base oil comprises: and adopting modified base oil to spray a preset thickness, and drying the preset thickness for a preset time through a preset temperature surface, so as to obtain a base oil layer with a rough structure on the surface.

According to a fifth aspect of the present application, there is provided a cooker comprising a cooker substrate, the cooker further comprising a composite coating layer provided according to the above-described respective embodiments or a composite coating layer produced according to the method of producing a composite coating layer provided according to the above-described respective embodiments, formed on the cooker substrate.

Drawings

The foregoing and other objects and features of the application will become more apparent from the following description of the embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic structural view of a cooker provided according to an embodiment of the application;

FIG. 2 is a schematic structural view of a composite coating provided in accordance with an embodiment of the present application;

fig. 3 is a schematic structural view of another composite coating provided according to an embodiment of the present application.

Detailed Description

The present inventive concept will be described more fully hereinafter with reference to the exemplary embodiments, however, the present inventive concept may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art.

In the ceramic coating material having a methylsiloxane polymer, the methylsiloxane polymer in the coating layer is peeled off by abrasion, and after the methylsiloxane polymer is peeled off, the non-tackiness of the coating layer is drastically reduced. Therefore, in order to achieve the purpose of improving the non-tackiness, the methylsiloxane polymer can be protected by reinforcement, and deterioration of the non-tackiness due to breakage of the methylsiloxane polymer after long-term use can be avoided.

The polysulfone resin particles are dispersed in the base oil of the ceramic coating in a predetermined amount, so that the polysulfone resin particles can be uniformly dispersed in the base oil of the ceramic coating, a base oil layer having a protective effect on the surface oil layer can be formed, and a cooker having a coating layer with improved lasting non-tackiness properties can be formed.

The inventive concept of the present application will be described in detail below in connection with exemplary embodiments.

According to a first aspect of the present application, there is provided a modified ceramic coating for use in a cooker, wherein the modified ceramic coating is a liquid coating, and the modified ceramic coating includes a modified base oil, the modified base oil including a base oil and polysulfone resin particles dispersed in the base oil, the mass fraction of the polysulfone resin particles in the modified base oil being 3% -6%.

In practice, it has been found that some of the foreign substances added to ceramic coatings present a reduction in the performance of the original coating. In this regard, according to the present application, the addition of a predetermined amount of polysulfone resin particles does not decrease the properties (e.g., strength, heat resistance, water resistance, toughness, etc.) of the original base oil, but also has a certain improvement effect on the properties of the base oil. In an exemplary embodiment, the polysulfone resin particles in the modified base oil are 3% -6% by mass based on the total amount of the modified base oil. The polysulfone resin particles can be uniformly dispersed in the base oil and do not affect the stability and performance of the base oil system. If the mass fraction of polysulfone resin particles in the modified base oil is less than 3%, the content of polysulfone resin particles in the modified base oil is relatively small, and the protective effect may be affected due to poor hardness of the base oil layer formed, thereby affecting the non-tackiness. If the mass fraction of polysulfone resin particles in the modified base oil is higher than 6%, the content of polysulfone resin particles in the modified base oil is relatively large, so that the roughness of a base oil layer to be mentioned later is overlarge, the roughness of a product with the base oil layer is overlarge, one pasta material is difficult to slide in the product, the use experience of a consumer is poor, on the other hand, the roughness needs to be in a proper range to promote non-tackiness, and the overlarge roughness can reduce lasting non-tackiness. According to the inventive concept, the mass fraction of polysulfone resin particles in the modified base oil has a parabolic relationship with the permanent non-tackiness within the mass fraction range of the present application. Thus, according to an exemplary embodiment of the present application, the mass fraction of polysulfone resin particles in the modified base oil may be 3% -4% or 4% -5%, preferably 4% -5%.

In order to ensure wear resistance and hardness of the formed composite coating, it is also necessary to control the particle size of polysulfone resin particles. According to the present application, polysulfone resin particles may be in the form of powder with a particle size of micron scale. In an exemplary embodiment, the polysulfone resin particles may have a particle size of 1 μm to 20 μm. When the particle diameter of the polysulfone resin particles is less than 1 μm, the powder particle diameter is too small, which not only affects the dispersibility of the polysulfone resin particles in the modified base oil, but also results in failure to form a predetermined coarse structure to be described later; when the particle size of polysulfone resin particles is larger than 20 μm, the particle size of the powder is too large, which leads to the roughness of the coarse structure of the underlying oil layer to be mentioned later being too large, thereby leading to the roughness of the product, one pasta is difficult to slide in the product, leading to poor use experience of consumers, and on the other hand, too large roughness also reduces lasting non-tackiness.

According to the present application, the modified ceramic coating further comprises a modified topcoat, and there are a number of possible examples of modified topcoat, in one possible example, the modified topcoat comprises a topcoat and a hydrophobic calcium carbonate material dispersed in the topcoat. In another possible example, the modified topcoat includes a topcoat and a lipophilic calcium carbonate material dispersed in the topcoat. Two possible examples will be described in detail below, respectively. The surface oil and the base oil belong to two kinds of coatings which are independently and separately used in the double-system ceramic coating.

The modified surface oil formed by modifying the hydrophobic calcium carbonate material will be described in detail below.

In some embodiments, the modified ceramic coating further comprises a modified topcoat comprising a topcoat and a hydrophobic calcium carbonate material dispersed in the topcoat, the mass fraction of the hydrophobic calcium carbonate material in the modified topcoat being from 5% to 30%.

According to the present application, the surface affinity between the individual particles of the hydrophobic calcium carbonate material is poor, and thus, the individual particles of the hydrophobic calcium carbonate material are not easily agglomerated, and can be uniformly dispersed in the solvent of the ceramic coating. In an exemplary embodiment, the weight fraction of hydrophobic calcium carbonate material in the modified ceramic coating is 5% -30%, the hydrophobic calcium carbonate material being able to be uniformly dispersed in the coating system and not affecting the stability of the ceramic coating system (e.g., excessive addition results in larger voids between the formed coating and the hydrophobic calcium carbonate material particles). If the mass fraction of the hydrophobic calcium carbonate material in the modified ceramic coating is lower than 5%, the content of the hydrophobic calcium carbonate material in the modified ceramic coating is relatively small, and the lasting non-tackiness can be affected due to poor hardness of the formed composite coating. If the mass fraction of the hydrophobic calcium carbonate material in the modified ceramic coating is higher than 30%, the content of the hydrophobic calcium carbonate material in the modified ceramic coating is relatively large, and the bonding performance between the particles of the hydrophobic calcium carbonate material and the non-adhesive layer in the formed coating is poor, so that the formed composite coating has more pores, the wear resistance and strength of the composite coating are reduced, and the lasting non-adhesive property is affected. According to the inventive concept, the mass fraction of hydrophobic calcium carbonate material in the modified ceramic coating has a parabolic relationship with the permanent non-tackiness within the mass fraction range defined above. Thus, according to exemplary embodiments of the present application, the mass fraction of hydrophobic calcium carbonate material in the modified ceramic coating may be 5% -10%, 8% -12%, 10% -15%, 15% -20%, 20% -25%, 25% -30%, 12% -25% or 15% -25%, preferably 12% -25%, more preferably 15% -20%.

According to some embodiments of the present application, calcium carbonate may be modified by a phosphate active agent, an aluminate coupling agent, or a titanate coupling agent, which are all macromolecular modifiers, thereby enabling a hydrophobic calcium carbonate material to be obtained that includes calcium carbonate and a hydrophobic substance that covers the surface of the calcium carbonate. Wherein, the calcium carbonate can be calcium carbonate with different purities, in particular, the purity is more than 92 percent. The higher the purity of the calcium carbonate, the better the modifying effect, facilitating the increase of the hydrophobicity to form a coating with improved permanent non-tackiness properties, and the better the quality (e.g., appearance) of the formed coating due to the higher whiteness. In an exemplary embodiment, the hydrophobic substance may be a calcium ester, in particular, a calcium phosphate, a calcium aluminate, a calcium titanate. In addition, the hydrophobic substance has better heat resistance, and can stably exist in the composite coating below 350 ℃, so that the composite coating cannot lose efficacy due to non-tackiness caused by long-term heating, and therefore, the modified ceramic coating can be permanently non-tacky and has longer non-tackiness life. In addition, the hydrophobic calcium carbonate material has excellent hydrophobic performance, and can weaken the infiltration degree of the composite coating by corrosive media, so that the corrosion resistance of the composite coating can be enhanced.

In an exemplary embodiment, the modification of calcium carbonate by the titanate coupling agent may be prepared by the following steps S101 to S104.

Step S101, mixing a titanate coupling agent and an organic solvent according to a predetermined mass ratio to obtain a mixed solution.

In embodiments herein, the titanate coupling agent may include at least one of isostearyl titanate, dodecylbenzenesulfonyl titanate, dioctyl phosphate titanate, isopropyl tri-titanate, dioctyl diphosphate titanium oxide, bis-ethylene titanate, and tetra-octyloxy dititanate. The organic solvent comprises at least one of white oil, petroleum ether, methanol, ethanol and isopropanol. The titanate coupling agent and the organic solvent form a mixed solution within a proper mass ratio range, the titanate coupling agent in the mixed solution can better coat the calcium carbonate, and the titanate coupling agent in the mixed solution with proper concentration can react with the calcium carbonate within a short time, so that the time for modifying the calcium carbonate can be shortened. In an exemplary embodiment, the mass ratio of titanate coupling agent to organic solvent is in the range of 1/2 to 1. When the mass ratio of the titanate coupling agent to the organic solvent is less than 1/2, the organic solvent accounts for more weight, namely the concentration of the mixed solution is smaller, which can lead to longer modification time, thereby prolonging the preparation time; when the mass ratio of the titanate coupling agent to the organic solvent is greater than 1, the titanate coupling agent accounts for a relatively large amount, namely the concentration of the mixed solution is too high, and the incomplete modification of the titanate can be caused by incomplete contact with the surface of the calcium carbonate.

Step S102, drying the calcium carbonate powder with the predetermined particle size for a preset time under a certain temperature condition.

In the embodiment of the application, before the calcium carbonate is modified, the moisture in the calcium carbonate powder can be removed as much as possible by drying, so that the modifying effect is ensured. In an exemplary embodiment, the 0.5 μm to 10 μm calcium carbonate powder may be dried at 80℃to 120℃for 0.5h to 2h.

And step S103, adding the dried calcium carbonate powder into the mixed solution, and uniformly stirring to form a suspension. Wherein the weight ratio of the calcium carbonate powder to the titanate coupling agent is 400:1-100:1.

In an exemplary embodiment, after the dried calcium carbonate powder is poured into the above mixed solution at a certain weight ratio, high-speed stirring is performed by using a stirrer with a speed of more than 3000r/min to 6000r/min for 0.5h to 2h.

Step S104, drying the suspension under the condition of a preset temperature, thereby obtaining the carbonate modified calcium carbonate.

In an exemplary embodiment, the predetermined temperature condition is 200-210 ℃. In this temperature range, the titanate coupling agent reacts with calcium ions hydrolyzed from the calcium carbonate surface to form titanate calcium (i.e., hydrophobic substances on the calcium carbonate surface) and adheres to the calcium carbonate surface, thereby changing the properties of the calcium carbonate and forming titanate-modified calcium carbonate. In the embodiment of the application, if the drying temperature is lower than 200 ℃, the volatilization of the organic solvent in the suspension is slower due to the too low temperature, and the surface of the calcium carbonate powder is not completely wrapped, so that the modification effect is poor; if the temperature is higher than 210 ℃, the speed of forming the titanate calcium on the surface of the calcium carbonate by the titanate coupling agent is too high due to the fact that the temperature is too high, so that the titanate calcium cannot be uniformly distributed on the surface of the calcium carbonate, uneven thickness of the titanate calcium is caused or the surface of the calcium carbonate is incompletely wrapped by the titanate calcium, and the modification effect is poor.

According to other embodiments of the present application, the hydrophobic calcium carbonate material may be a silane coupling agent modified calcium carbonate or a coupling dispersant modified calcium carbonate. The calcium carbonate can be modified by a silane coupling agent or a coupling dispersing agent, and the silane coupling agent or the coupling dispersing agent can react with surface hydroxyl groups of the calcium carbonate, so that a hydrophobic calcium carbonate material can be obtained. Wherein the hydrophobic calcium carbonate material comprises calcium carbonate and hydrophobic substances which are covered on the surface of the calcium carbonate and penetrate into micropores on the surface of the calcium carbonate. The calcium carbonate may be calcium carbonate of different purity, specifically, calcium carbonate of 92% or more purity. The higher the purity of the calcium carbonate is, the better the modifying effect is, the hydrophobicity is conveniently improved to form a coating with improved lasting non-tackiness, and the higher the whiteness is, the better the quality of the formed coating is. In addition, the surface of the calcium carbonate is provided with pores, and as the silane coupling agent or the coupling dispersing agent is a small molecular modifier, the hydrophobic substance can not only cover the surface of the calcium carbonate, but also enter the small gaps, so that the calcium carbonate is more fully modified, and a better hydrophobic effect is obtained. In addition, the hydrophobic substance has better heat resistance, and can stably exist in the composite coating below 350 ℃, so that the composite coating cannot lose efficacy due to non-tackiness caused by long-term heating, and therefore, the modified ceramic coating can be permanently non-tacky and has longer non-tackiness life. In addition, the hydrophobic calcium carbonate material has excellent hydrophobic performance, and can weaken the infiltration degree of the composite coating by corrosive media, so that the corrosion resistance of the composite coating can be enhanced.

In order to ensure that the resulting composite coating has abrasion resistance and hardness, it is also necessary to control the particle size of the hydrophobic calcium carbonate material. According to the present application, the hydrophobic calcium carbonate material may be in powder form with a particle size on the order of microns. In an exemplary embodiment, the particle size of the hydrophobic calcium carbonate material may be 3 μm to 10 μm. When the particle diameter of the hydrophobic calcium carbonate material is less than 3 μm, the powder particle diameter is too small, which not only affects the dispersibility of the hydrophobic calcium carbonate material in the modified ceramic coating material, but also results in failure to form a concave-convex structure to be described later; when the particle size of the hydrophobic calcium carbonate material is larger than 10 mu m, the particle size of the powder is too large, so that the roughness of the concave-convex structure is larger, and the abrasion resistance of the composite coating layer is not up to the standard.

The modified surface oil formed by modification with the lipophilic calcium carbonate material will be described in detail below.

In an embodiment, the modified ceramic coating further comprises a modified surface oil, wherein the modified surface oil comprises surface oil and a lipophilic calcium carbonate material dispersed in the surface oil, and the mass fraction of the lipophilic calcium carbonate material in the modified surface oil is 10% -30%.

In these embodiments, the modified topcoat oil is capable of forming a composite coating with uniformly distributed oleophilic calcium carbonate particles, so that cookware with the composite coating can not only promote non-tackiness by means of a non-stick layer formed by a ceramic coating, but also further promote non-tackiness by forming an oil film after use due to oleophilic coating, thereby achieving the purpose of durable non-tackiness.

According to the application, the surface affinity between particles of the lipophilic calcium carbonate material is good, the electrostatic adsorption capacity is strong, and agglomeration is easy, so that the particles are not easy to uniformly disperse in a solvent of the ceramic coating. According to the preparation method, the addition amount of the lipophilic calcium carbonate is controlled within a preset range or the preparation method of the modified ceramic coating is controlled, so that the lipophilic calcium carbonate material can meet the requirement of dispersibility in the ceramic coating, and the purpose of lasting non-adhesion can be achieved. The control of the addition amount of the lipophilic calcium carbonate will be specifically described below, and the preparation method will be described in the preparation method described later. In an exemplary embodiment, the mass fraction of the lipophilic calcium carbonate material in the modified ceramic coating is 10% -30%, the lipophilic calcium carbonate material being able to be uniformly dispersed in the coating system and not affecting the stability of the ceramic coating itself system. If the mass fraction of the lipophilic calcium carbonate material in the modified ceramic coating is lower than 10%, the content of the lipophilic calcium carbonate material in the modified ceramic coating is relatively small, and the lasting non-tackiness can be affected due to poor hardness of the formed composite coating. If the mass fraction of the lipophilic calcium carbonate material in the modified ceramic coating is higher than 30%, the content of the lipophilic calcium carbonate material in the modified ceramic coating is relatively large, and the lipophilic calcium carbonate material may not be uniformly dispersed in the ceramic coating, thereby affecting the uniformity of the composite coating and further affecting the lasting non-tackiness. In addition, the content of the lipophilic calcium carbonate material in the modified ceramic coating is more, so that the surface roughness of the composite coating becomes large, the abrasion resistance is obviously reduced, and even the turner is not smooth after being stir-fried in a cooker, thereby influencing the use experience of consumers. According to the inventive concept, the mass fraction of lipophilic calcium carbonate material in the modified ceramic coating has a parabolic relationship with the permanent non-tackiness within the mass fraction range defined above. Thus, according to exemplary embodiments of the present application, the mass fraction of lipophilic calcium carbonate material in the modified ceramic coating may be 10% -15%, 15% -20%, 18% -22%, 20% -25%, 25% -30%, preferably 18% -22%, more preferably 19% -21%.

According to the present application, the lipophilic calcium carbonate material is stearic acid modified calcium carbonate, and the calcium carbonate can be modified by stearate, and since stearate is a macromolecular modifier, the lipophilic calcium carbonate material comprising calcium carbonate and lipophilic substances coated on the surface of calcium carbonate can be obtained. Wherein, the calcium carbonate can be calcium carbonate with different purities, in particular, the purity is more than 92 percent. The higher the purity of the calcium carbonate is, the better the modification effect is, the lipophilicity is conveniently improved to form a coating with lasting non-sticky property and improved coating quality can be better due to higher whiteness. In an exemplary embodiment, the lipophilic substance may be calcium stearate, which has excellent lipophilic performance, not only can effectively protect the methylsiloxane polymer formed by the ceramic coating, but also can enable the surface of the composite coating to form a layer of oil film in the use process, so that the lasting non-stick performance can be improved. In addition, the heat resistance of the oleophilic substance is good, and the oleophilic substance can be stably present in the composite coating below 120 ℃, so that the composite coating cannot lose efficacy due to non-tackiness caused by long-term heating, and therefore, the modified ceramic coating can be permanently non-tacky and has a longer non-tackiness life.

In an exemplary embodiment, the calcium carbonate is modified by stearate, and the stearic acid-modified calcium carbonate may be prepared through the following steps S101 to S103.

Step S101, providing saponified stearate.

In the examples herein, the saponified stearate is capable of hydrolyzing and forming stearate groups, thereby facilitating the reaction with calcium ions on the surface of calcium carbonate in the subsequent step and forming calcium stearate (stearate and calcium carbonate have extremely high affinity), and thus, the stearic acid-modified calcium carbonate coated with calcium stearate can be obtained.

Step S103, mixing the saponified stearate, the calcium carbonate and the dispersing agent according to a preset amount, stirring at a preset temperature for a preset time, and drying to obtain the stearic acid modified calcium carbonate.

In the examples herein, the weight ratio of stearate, calcium carbonate and dispersant is (1-20): 9 (0.5-1) in order. The calcium carbonate powder and the dispersing agent can be gradually added into the saponified stearate, then the mixture is heated to 50-100 ℃, and is rotated for 10-30min under high-speed stirring of 6000r/min-12000r/min, then is rotated for 2-4 h under 300-500r/min, and the filtered matter is filtered and evaporated to dryness to obtain the stearic acid modified calcium carbonate.

In order to ensure that the resulting composite coating has abrasion resistance and hardness, it is also necessary to control the particle size of the oleophilic calcium carbonate material. According to the present application, the lipophilic calcium carbonate material may be in powder form, with a particle size on the order of microns. In an exemplary embodiment, the particle size of the oleophilic calcium carbonate material can be in the range of 1 μm to 10 μm. Too large or too small particle size of the oleophilic calcium carbonate material may not meet the hardness and abrasion resistance of the formed composite coating and may also affect the appearance of the formed coating.

According to a second aspect of the present application, there is provided a method of preparing a modified ceramic coating, wherein the modified ceramic coating comprises a modified base oil, the step of preparing the modified base oil comprising:

step S101, polysulfone resin particles and a base oil are provided.

Step S102, mixing polysulfone resin particles and base oil for a predetermined time to prepare a modified base oil, wherein the mass fraction of the polysulfone resin particles in the modified base oil is 3% -6%.

According to the present application, the modified ceramic coating further comprises a modified topcoat, several examples of which are provided herein, in one possible example the modified topcoat comprises a topcoat and a hydrophobic calcium carbonate material dispersed in the topcoat. In another possible example, the modified topcoat includes a topcoat and a lipophilic calcium carbonate material dispersed in the topcoat. The two modified surface oils are prepared in different ways, and the preparation methods of the two possible examples of the modified surface oils will be described in detail below.

The method for preparing the modified surface oil formed by modifying the hydrophobic calcium carbonate material will be described in detail below.

In some embodiments, the modified ceramic coating further comprises a modified topcoat, the step of preparing the modified topcoat comprising:

step S201, providing a hydrophobic calcium carbonate material and a cured topcoat oil.

Step S202, mixing the hydrophobic calcium carbonate material and the cured flour oil for a preset time to prepare the modified flour oil, wherein the mass fraction of the hydrophobic calcium carbonate material in the modified flour oil is 5% -30%.

In an embodiment, the hydrophobic calcium carbonate material and the cooked flour oil are mixed for a predetermined time under high speed agitation. In an exemplary embodiment, the predetermined time of mixing may be 0.5h-2h and the speed of agitation may be 500r/min-1000r/min, thereby uniformly dispersing the hydrophobic calcium carbonate material in the cured flour oil. The stirring time should correspond to the stirring speed, and for example, in the case where the stirring speed is small, the stirring time may be appropriately prolonged. If stirring is performed at a low speed for a short time, uniformity of the dispersion may not be ensured, and if stirring is performed at a high speed for a long time, mixing for a long time may affect production efficiency.

The ceramic paint is formed by combining a base oil and a surface oil which are used independently of each other. In the present application, the modified ceramic coating is formed by combining a modified base oil and a modified surface oil, which are used independently of each other. In each system of the top oil or the bottom oil, a plurality of paints which can be mixed before use are included, and after the plurality of paints are mixed, the self system can be kept stable for a short time, so that the self system of the ceramic paint is not influenced when the modified ceramic paint is manufactured. In the examples of the present application, the cured topcoat is a topcoat after a plurality of paints of the topcoat are sufficiently mixed and cured for a predetermined time. After curing of the topcoat, a coating system is formed which is stable in system and contains a predetermined amount of methylsiloxane-based polymer, and therefore, the addition of a hydrophobic calcium carbonate material after curing of the topcoat can not only ensure that the modified topcoat system formed is not destroyed, but also satisfy the requirement of dispersibility, thereby facilitating the formation of the desired composite coating as desired. After the modified surface oil is formed, the modified surface oil can be stored in a sealed state for standby or immediate use, thereby ensuring the effectiveness of the modified surface oil.

The hydrophobic calcium carbonate material has hydrophobic properties and can be uniformly dispersed in the surface oil, but due to the high activity of the surface hydrophobic substance of the hydrophobic calcium carbonate material, the hydrophobic substance may react with a plurality of paint forming the surface oil (for example, the hydrophobic substance may react with-OH formed by hydrolysis of methyltriethoxysilane), thereby affecting the quality and quantity of the formed methylsiloxane polymer.

For this purpose, in the examples according to the present application, the step of preparing the cured flour oil comprises: step S301, providing a first coating, wherein the first coating comprises methyl siloxane monomers; step S302, providing a second coating, wherein the second coating comprises silicic acid substances; wherein the first coating and the second coating are mixed to form a mixture, and the mixture is subjected to sol-gel reaction to form the coating comprising a predetermined amount of the methyl siloxane polymer, thereby obtaining the cured topcoat. In embodiments of the present application, the second coating may include a filler, such as titanium dioxide, in addition to the silicic acid species, to provide abrasion resistance, etc. to the final coating. The second coating may also include a catalyst that catalyzes the curing of the topcoat.

In an embodiment, the methylsiloxane-based polymer may be at least one of polymethylsiloxane, polydimethylsiloxane, polymethylphenylsiloxane, and polydiphenylsiloxane. According to the present application, the hydrophobic calcium carbonate material is added after a predetermined amount of the methylsiloxane-based polymer is formed, so that it is possible to ensure that the stability of the surface oil self-system is not affected by the addition of the hydrophobic calcium carbonate material. In an exemplary embodiment, the mass fraction of the methylsiloxane polymer in the modified topcoat is 20% to 30%.

In an exemplary embodiment, the methylsiloxane monomer may be Methyltriethoxysilane (MTES), the silicic acid substance may be tetraethyl orthosilicate (TEOS), and the hydrophobic group-CH on the surface is prepared by controlling the process according to different hydrolysis speeds of Methyltriethoxysilane (MTES) and tetraethyl orthosilicate (TEOS) in the two coatings ₃ And hydrophilic group-OH-SiO ₂ Sol of SiO ₂ During the ageing process of sol, nano SiO ₂ Self-assembling clusters form a surface oil comprising polydimethylsiloxane. If the hydrophobic calcium carbonate material is added to one of the plurality of paints forming the topcoat or to the incompletely cured topcoat, methyl silicone which affects the topcoat primarily in non-stick form due to reaction with the topcoat-forming paintAnd (3) forming an oxyalkane polymer. Therefore, according to the present application, the addition of the hydrophobic calcium carbonate material after complete curing can not only ensure that the system of the formed modified topcoat oil is not destroyed, but also satisfy the requirement of dispersibility, thereby enabling the formation of a desired composite coating layer as desired. In addition, compared with the existing mode that a dispersing agent (such as a solvent) is additionally added to ensure the dispersibility, the method not only can ensure the stability and the dispersibility of a coating system, but also can shorten the steps of a preparation process.

The method for preparing the modified surface oil formed by modifying the lipophilic calcium carbonate material will be described in detail.

In other embodiments, the modified ceramic coating further comprises a modified topcoat, the step of preparing the modified topcoat comprising:

step S301, providing a first coating, wherein the first coating comprises a methyl siloxane monomer.

In step S302, a second coating is provided, the second coating comprising silicic acid.

In an exemplary embodiment, the second coating may include a filler, such as titanium dioxide, in addition to the silicic acid species, to provide abrasion resistance, etc. to the final coating. The second coating may also include a catalyst that catalyzes the curing of the topcoat. The cured topcoat oil finally formed includes a predetermined amount of a methylsiloxane-based polymer, thereby enabling non-tackiness to be exhibited in the composite coating. In an exemplary embodiment, the mass fraction of the methylsiloxane polymer in the modified topcoat is 20% to 30%.

In step S303, a lipophilic calcium carbonate material is provided.

Step S304, mixing the lipophilic calcium carbonate material with the first coating material, thereby obtaining a dispersion in which the lipophilic calcium carbonate material is dispersed in the first coating material.

In embodiments of the present application, the lipophilic calcium carbonate material and the first coating are mixed under high speed agitation for a predetermined time. In an exemplary embodiment, the predetermined time of mixing may be 20min-40min and the speed of stirring may be 6000r/min-12000r/min, thereby uniformly dispersing the lipophilic calcium carbonate material in the first coating. According to the present application, the predetermined time for mixing should be set in correspondence with the stirring speed, and in the case where the stirring speed is relatively low, the stirring time can be appropriately prolonged. If stirring is performed at a low speed for a short time, uniformity of the dispersion may not be ensured, and if stirring is performed at a high speed for a long time, mixing for a long time may affect production efficiency.

Step S305, mixing the second coating material with the dispersion liquid, thereby preparing a modified surface oil including a surface oil and a lipophilic calcium carbonate material dispersed in the surface oil (i.e., a modified surface oil in which the lipophilic calcium carbonate material is dispersed in the surface oil), wherein the mass fraction of the lipophilic calcium carbonate material in the modified surface oil is 10% -30%.

In an exemplary embodiment, the second coating is mixed with the dispersion for a predetermined time with stirring. In an exemplary embodiment, the predetermined time of mixing may be 8h to 10h and the speed of stirring may be 400r/min to 600r/min, thereby uniformly dispersing the lipophilic calcium carbonate material in the first coating. According to the present application, the predetermined time for mixing should be set in correspondence with the stirring speed, and in the case where the stirring speed is relatively low, the stirring time can be appropriately prolonged. If stirred for a short period of time at a low speed, the top oil may not be cured completely, thereby affecting the quality and amount of the methylsiloxane-based polymer formed, and if stirred for a long period of time at a high speed, the mixing time is too long, which may affect the production efficiency.

According to the method for preparing the modified surface oil, in the step of preparing the modified surface oil, the lipophilic calcium carbonate and the first coating comprising the methyl siloxane monomer are mixed, the lipophilic calcium carbonate and the first coating comprising the methyl siloxane monomer have good dispersibility and do not react, so that a dispersion liquid of the lipophilic calcium carbonate material dispersed in the first coating is formed, and then the other components for preparing the surface oil are mixed with the dispersion liquid, so that the modified surface oil comprising the surface oil and the lipophilic calcium carbonate material dispersed in the surface oil is prepared. According to the application, the formed modified surface oil system is not damaged, the requirement of dispersibility can be met, and the expected composite coating can be formed conveniently according to the requirement. After the modified surface oil is formed, the modified surface oil can be stored in a sealed state for standby or immediate use, thereby ensuring the effectiveness of the modified surface oil.

According to a third aspect of the present application, there is provided a composite coating layer, wherein the composite coating layer includes a base oil layer having a roughened structure formed by a modified base oil in a modified ceramic coating material and a surface oil layer disposed on the base oil layer, at least a partial region of the surface oil layer being located in a recess of the roughened structure.

According to the composite coating provided by the embodiment of the application, as the surface oil layer of the part is protected at the concave part of the coarse structure of the bottom oil layer, the damage caused by contact in the using process can be avoided, and the non-stick performance can be improved.

In an embodiment, the peak-to-peak spacing between adjacent protrusions of the roughness structure is 10 μm-30 μm and the height of the protrusions is 10 μm-20 μm.

In an embodiment, the thickness of the base oil layer is 10 μm to 30 μm. When the thickness of the base oil layer is less than 10 mu m, the base oil is too thin, so that an effective base oil functional layer cannot be formed, such as corrosion resistance, hardness, coating strength and the like; when the thickness of the base oil layer is more than 30 mu m, the cost is high, but the functions of corrosion resistance, hardness and coating strength are not obviously improved.

According to the present application, the modified ceramic coating further comprises a modified topcoat, there are a number of possible examples of modified topcoat, in one possible example, a modified topcoat comprises a topcoat and a hydrophobic calcium carbonate material dispersed in the topcoat. In another possible example, the modified topcoat includes a topcoat and a lipophilic calcium carbonate material dispersed in the topcoat. The two modified surface oils are different in the surface oil layer prepared by the modified surface oil formed by modifying the lipophilic calcium carbonate material, and the surface oil layer comprises a non-stick coating and the lipophilic calcium carbonate material filled in the non-stick coating. The oil layer prepared from the modified oil formed by modifying the hydrophobic calcium carbonate material will be described in detail, and the other mode will not be described.

In some embodiments, the topcoat layer includes a first sub-layer having a relief structure on a surface thereof, the first sub-layer including a plurality of convex hulls formed by aggregation of hydrophobic calcium carbonate material in the modified topcoat and a first non-stick layer distributed at least over a surface of the plurality of convex hulls, at least a portion of a region of the first non-stick layer being located in a depression of the plurality of convex hulls.

Fig. 1 is a schematic structural view of a cooker provided according to an embodiment of the present application. Fig. 2 shows a structural example of a composite coating according to the present application. As shown in fig. 1 and 2, the cooker includes a cooker base 20 and a composite coating 10 formed on an inner surface of the cooker base 20. Among them, the composite coating layer 10 may include a base oil layer 11 and a surface oil layer 12, the surface of the base oil layer 11 having a rough structure and being filled with a plurality of polysulfone resin particles. The finish layer 12 includes a plurality of convex hulls formed from an aggregation of hydrophobic calcium carbonate material and a first non-stick layer distributed over at least a surface of the plurality of convex hulls.

In these embodiments, since the first non-stick layer includes the methylsiloxane polymer formed from the topcoat in the modified topcoat, a certain non-stick property can be exhibited, and both the roughness structure and the relief structure as reinforcing structures can form an effective protection for the methylsiloxane polymer of the first non-stick layer, thereby making the composite coating permanently non-stick.

In order to further improve the non-tackiness, the top oil layer further comprises a second sub-layer arranged outside the first sub-layer, the second sub-layer comprises a second non-tackiness layer and hydrophobic calcium carbonate material filled in the second non-tackiness layer, wherein the second non-tackiness layer comprises a methyl siloxane polymer formed by ceramic paint in the modified ceramic paint, and at least part of the area of the second sub-layer is positioned in the concave-convex structure of the first sub-layer.

Fig. 1 is a schematic structural view of a cooker provided according to an embodiment of the present application. Fig. 3 shows a structural example of another composite coating according to the present application. As shown in fig. 1 and 3, the cooker includes a cooker base 20 and a composite coating 10 formed on an inner surface of the cooker base 20. Among them, the composite coating layer 10 may include a base oil layer 11 and a surface oil layer 12, the surface of the base oil layer 11 having a rough structure and being filled with a plurality of polysulfone resin particles. The oil-in-water layer 12 includes a first sub-layer 121 and a second sub-layer 122 disposed outside the first sub-layer 121, the first sub-layer 121 having a relief mechanism including a plurality of convex hulls formed by aggregation of hydrophobic calcium carbonate material and a first non-stick layer distributed at least on surfaces of the plurality of convex hulls. The second sub-layer 122 includes a second non-stick layer and a hydrophobic calcium carbonate material dispersed in the second non-stick layer. At least a partial region of the second sub-layer 122 is located in the recess of the relief structure of the first sub-layer 121.

In an embodiment, the thickness of the first sub-layer is 10 μm-20 μm and the thickness of the first sub-layer is 1/3-2/5 of the total thickness of the composite coating.

In an embodiment, the relief structure is made up of a number of convex hulls, 3-8 per square centimeter of area. Wherein, the peak interval between adjacent convex hulls of the convex hulls is 5 μm-15 μm, and the height of the convex hulls is 5 μm-15 μm. Therefore, the second sub-layer located above the concave-convex structure also has a surface roughness structure adapted to the concave-convex structure, when the peak pitch between adjacent convex hulls is smaller than 5 μm, the peak pitch is too small, indicating that the depressions (i.e., the valley positions) of the surface roughness structure are narrower, and therefore, when the methyl groups at the peaks are worn out, the methyl groups of the methylsiloxane-based polymer of the second sub-layer located at the depressions cannot be sufficiently exposed, thereby affecting the non-tackiness thereof and thus the permanent non-tackiness performance. When the peak pitch between adjacent convex hulls is greater than 15 μm, the peak pitch is too large, indicating that the concave positions of the surface roughness structure are easily touched, so that methyl groups at the concave positions (i.e., the valley positions) are easily worn, resulting in a shorter non-sticking lifetime. When the height of the convex hull is less than 5 μm, the convex hull is too low to form an effective recess to form a protection area; when the height of the convex hull is more than 15 μm, the coating wear resistance may be deteriorated due to insufficient strength of the convex hull, thereby affecting the durability of non-tackiness.

According to a fourth aspect of the present application, there is provided a method of manufacturing a composite coating, wherein the method of manufacturing a composite coating comprises:

step S401, providing modified base oil and surface oil;

step S402, adopting modified base oil spraying to form a base oil layer with a rough structure on the surface,

step S403, spraying surface oil on the bottom oil layer to form a composite coating with the surface oil layer.

According to the method for manufacturing the composite coating provided by the embodiment of the application, the modified base oil comprises base oil and polysulfone resin particles dispersed in the base oil, and the mass fraction of the polysulfone resin particles in the modified base oil is 3% -6%. When the mass fraction of polysulfone resin particles in the modified base oil is less than 3%, the surface roughness of the formed base oil layer is small, so that the improvement effect of the durable non-tackiness is not obvious. When the mass fraction of polysulfone resin particles in the modified base oil is more than 6%, the surface roughness of the formed base oil layer is easy to be too large, the product roughness is easy to appear, one side of flour material is difficult to slide in the product, the use experience of consumers is poor, and on the other hand, the too large roughness can reduce lasting non-tackiness.

According to the application, the polysulfone resin particles of the micron level can be uniformly dispersed in the primer coating, and under the condition that the temperature interference exists in the range of the preset spraying thickness, a primer layer with a plurality of raised coarse structures can be obtained, so that the concave parts of the coarse structures can form more effective protection on the non-adhesive layer formed by the ceramic coating. In an embodiment, the step of spraying with the modified base oil comprises: and spraying the modified base oil to a preset thickness, and drying the preset thickness for a preset time through a preset temperature, so as to obtain the base oil layer with the surface having a coarse structure. Specifically, the first preset thickness is 10 μm-30 μm, the preset temperature is 80 ℃ to 120 ℃, and the preset time is 3 min-5 min.

According to the present application, the modified ceramic coating further comprises a modified topcoat, there are a number of possible examples of modified topcoat, in one possible example, a modified topcoat comprises a topcoat and a hydrophobic calcium carbonate material dispersed in the topcoat. In another possible example, the modified topcoat includes a topcoat and a lipophilic calcium carbonate material dispersed in the topcoat. The two modified surface oils are different in the way of preparing the coating, and the modified surface oil formed by the lipophilic calcium carbonate material can form a required surface oil layer by adopting a spraying way. The manner in which the modified topcoat oil formed from the hydrophobic calcium carbonate material is used to prepare the coating will be described in detail below, while the other manner will not be described.

According to the application, the micron-sized hydrophobic calcium carbonate material can be uniformly dispersed in the modified ceramic coating, and can obtain the oil layer with the concave-convex structure of a plurality of convex hulls under the condition of spraying preset thickness and temperature interference, so that the concave part of the concave-convex structure can form more effective protection on the methyl siloxane polymer formed by the ceramic coating. In addition, the hydrophobic calcium carbonate material has certain hydrophobicity and can provide certain non-sticking function. In addition, the application can form a surface oil layer with the hydrophobic calcium carbonate material uniformly dispersed under the condition that temperature interference does not exist, so that the lasting non-stick performance is further improved.

The preparation method of the oil-in-surface layer will be described below with reference to specific examples.

In an embodiment, the oil-facing layer includes a first sub-layer having a concave-convex structure on a surface, and the step of spraying the modified ceramic coating includes spraying a first preset thickness with the modified ceramic coating, and drying for a preset time at a preset temperature to obtain the first sub-layer having the concave-convex structure on the surface. When the first sub-layer is formed, the thickness of spraying, the temperature and the time of surface drying are required to be controlled, so that the first sub-layer not only has a proper concave-convex structure, but also can ensure the quality of the first sub-layer. In an exemplary embodiment, the first predetermined thickness is 10 μm to 20 μm, the predetermined temperature is 80℃to 120℃and the predetermined time is 3min to 5min. The temperature and time should be set correspondingly, and when the temperature is low, the time should be prolonged appropriately. When the surface drying is performed for a short time at a lower temperature, the latent solvent in the coating is volatilized slowly, so that a preset concave-convex structure is not easy to form, and when the surface drying is performed for a long time at a higher temperature, the coating defects such as cracking and the like of the finally formed first sub-layer are easy to occur.

In these examples, when reacted at a predetermined temperature of 80-120 ℃ for a predetermined time of 3-5 min, the hydrophobic calcium carbonate with poor surface affinity may better "flow" in the coating, and the larger particles of hydrophobic calcium carbonate and hydrophobic calcium carbonate flow and aggregate (accumulate) together, thereby forming a concave-convex structure with a plurality of convex hulls, and thus being capable of forming effective protection for the methylsiloxane-based polymer of the first non-stick layer to extend the durable non-stick performance of the composite coating. In addition, if the roughness is formed on the pot by processing (for example, forming the roughness by spinning or pressing), not only the preset roughness cannot be formed, but also the manufacturing period of the pot may be prolonged, and the manufacturing cost may be increased.

In order to further improve the non-tackiness, the surface oil layer further comprises a second sub-layer arranged outside the first sub-layer, and the step of spraying the modified ceramic coating is adopted, specifically, the step of spraying the modified surface oil on the first sub-layer to a second preset thickness is further included, so that the second sub-layer is obtained. In an exemplary embodiment, the second preset thickness is 25 μm-40 μm and the first preset thickness is 1/3-2/5 of the total thickness of the spray coating, wherein the total thickness of the spray coating is the sum of the first preset thickness and the second preset thickness.

In these embodiments, if the second sub-layer is within the preset thickness range, a part of the area of the second sub-layer is protected at the concave portion of the concave-convex structure of the first sub-layer, so as to form the composite coating with concave-convex surface layer, and the second sub-layer at the concave portion can be continuously protected, so that the second sub-layer can be further lifted.

In an embodiment, the first preset thickness is 10 μm-20 μm, the second preset thickness is 25 μm-40 μm, and the first preset thickness is 1/3-2/5 of the total thickness of the spray coating. It should be noted that, due to the presence of the concave-convex structure, the thicknesses of the first sub-layer and the second sub-layer which are finally formed are not greatly different from the corresponding spraying thicknesses.

According to a fifth aspect of the present application, there is provided a cooker, wherein the cooker comprises a cooker substrate and the composite coating provided by the above respective embodiments formed on the cooker substrate and the composite coating produced by the method of producing the composite coating.

As shown in fig. 1, the cooker includes a cooker base 20 and a composite coating 10 formed on a surface of the cooker base 20. The composite coating may be the composite coating 10 mentioned in the above embodiments, and thus has all the advantages of the composite coating described above, and will not be described in detail herein.

The present application will be described in detail with reference to examples, but the scope of protection of the present application is not limited to the examples.

Example 1

The pot according to example 1 was manufactured by the following method.

Step S11, preparing a cooker body.

Step S12, preparing modified base oil with the mass fraction of 4% of polysulfone resin particles.

And S13, preparing the modified surface oil with 15% of mass fraction of the titanate coupling agent modified calcium carbonate.

Step S14, forming a bottom oil layer with the thickness of 20 mu m by adopting the modified bottom oil of the embodiment, and placing the pot body in an environment of 80 ℃ after spraying, and drying for 3 minutes.

And S15, after the surface of the bottom oil layer is dried, adopting modified surface oil to form a thickness of 10 mu m on the bottom oil layer through air spraying, and after spraying, placing the pot body in an environment of 80 ℃, and drying the surface for 3 minutes, thereby obtaining a first sub-layer.

Step S16, spraying modified surface oil to a thickness of 10 mu m on the first sub-layer, placing the pot body in a sintering furnace and sintering at a temperature of 100 ℃ for 4min, thereby forming the pot of the embodiment 1.

Example 2

The pot according to example 2 was manufactured by the following method.

Step S21, preparing a cooker body.

Step S22, preparing modified base oil with the mass fraction of polysulfone resin particles being 4%;

and S23, preparing the modified surface oil with 15% of mass fraction of the titanate coupling agent modified calcium carbonate.

Step S24, forming a bottom oil layer with the thickness of 20 mu m by adopting the modified bottom oil of the embodiment, and placing the pot body in an environment of 80 ℃ after spraying, and drying for 3 minutes.

Step S25, after the surface of the bottom oil layer is dried, forming a surface oil layer with the thickness of 20 mu m on the bottom oil layer by adopting modified surface oil, and after spraying, placing the pot body in a sintering furnace and placing the pot body in a temperature range of 100 ℃ for sintering for 4min, thereby forming the pot of the embodiment 2.

Example 3

The pot of example 3 was manufactured by the same method as example 1, except that the modified base oil having a mass fraction of 3% of polysulfone resin particles was formed.

Example 4

The pot of example 4 was manufactured by the same method as example 1, except that the modified base oil having a mass fraction of 6% of polysulfone resin particles was formed.

Example 5

A pot of example 5 was manufactured in the same manner as in example 1, except that a modified surface oil having a mass fraction of 15% of stearic acid-modified calcium carbonate was formed.

Example 6

A pot of example 6 was manufactured in the same manner as in example 1, except that the inner surface of the pot body was sandblasted so that the roughness Ra of the inner surface of the pot body was 3-6 μm in step S11.

Comparative example 1

A pot of comparative example 1 was manufactured in the same manner as in example 1, except that the modified base oil having a mass fraction of 2% of polysulfone resin particles was formed.

Comparative example 2

A pot of comparative example 2 was manufactured in the same manner as in example 1, except that the modified base oil having a mass fraction of 7% of polysulfone resin particles was formed.

Comparative example 3

The pot of comparative example 3 was manufactured by forming a base oil layer having a thickness of 20 μm using base oil, and forming a surface oil layer having a thickness of 20 μm using surface oil on the base oil layer.

Performance index test

(1) The performance test was performed on the pot obtained above, the specific performance test method is as follows, and the results are recorded in table 1 below:

the testing method comprises the following steps:

(1) persistent tack-free test method: the duration tack free test method in GB/T32388-2015 is in times, the higher the times are, the longer the service life is, the tack free result is evaluated 1000 times, and the times when the test method is used to III grade are recorded.

Table 1 performance test data for the examples and comparative examples of the present application

Sequence number	Durable non-stick (secondary)
		Example 1	14000
Example 2	12000
		Example 3	6000
Example 4	6000
		Example 5	13000
Example 6	15000
		Comparative example 1	4000
Comparative example 2	4000
		Comparative example 3	1000

As can be seen from table 1, the conventional ceramic coating of comparative example 3 cannot meet the national standard requirements (not less than 5000 times) for durable non-stick effect, however, according to the present application, polysulfone resin particles are added into the base oil to form modified base oil, and the modified base oil forms a coating layer with a preset coarse structure, so that a better protection can be formed for the surface oil layer on the base oil layer, and thus non-stick can be promoted. In addition, the application also disperses hydrophobic calcium carbonate or lipophilic calcium carbonate in the surface oil to form modified surface oil, and the surface oil layer with better non-viscosity can be formed on the bottom oil layer through the modified surface oil, so that the non-viscosity can be further improved, and the national standard requirement can be met.

Although embodiments of the present application have been described in detail hereinabove, various modifications and variations may be made to the embodiments of the present application by those skilled in the art without departing from the spirit and scope of the present application. It will be appreciated that such modifications and variations will still fall within the spirit and scope of the embodiments of the present application as defined by the appended claims, as will occur to those skilled in the art.

Claims

1. The modified ceramic coating is characterized by comprising modified base oil and modified surface oil, wherein the modified base oil and the modified surface oil are independently used, the modified base oil consists of base oil and polysulfone resin particles dispersed in the base oil, the mass fraction of the polysulfone resin particles in the modified base oil is 3% -6%, the modified surface oil consists of cured surface oil and hydrophobic calcium carbonate materials dispersed in the cured surface oil, the cured surface oil is a coating of methyl siloxane polymers, and the mass fraction of the hydrophobic calcium carbonate materials in the modified surface oil is 5% -30%.

2. The modified ceramic coating is characterized by comprising modified base oil and modified surface oil, wherein the modified base oil and the modified surface oil are independently used, the modified base oil consists of base oil and polysulfone resin particles dispersed in the base oil, the mass fraction of the polysulfone resin particles in the modified base oil is 3% -6%, the modified surface oil consists of cured surface oil and lipophilic calcium carbonate materials dispersed in the cured surface oil, the cured surface oil is a coating of methyl siloxane polymers, and the mass fraction of the lipophilic calcium carbonate materials in the modified surface oil is 10% -30%.

3. The modified ceramic coating according to claim 1 or 2, wherein the polysulfone resin particles have a particle size of 1 μm to 20 μm.

4. The modified ceramic coating of claim 1, wherein the hydrophobic calcium carbonate material has a particle size of 3 μιη to 10 μιη.

5. The modified ceramic coating of claim 2, wherein the particle size of the oleophilic calcium carbonate material is 1 μm to 10 μm.

6. A method of preparing a modified ceramic coating comprising a modified base oil and a modified top oil, wherein the modified base oil and the modified top oil are used independently, the step of preparing the modified base oil comprising:

providing polysulfone resin particles and a base oil;

mixing the polysulfone resin particles and the base oil for a predetermined time to prepare the modified base oil, wherein the mass fraction of the polysulfone resin particles in the modified base oil is 3% -6%;

the preparation method of the modified flour oil comprises the following steps:

providing a hydrophobic calcium carbonate material and a cured flour oil;

mixing the hydrophobic calcium carbonate material and the cured flour oil for a preset time to prepare the modified flour oil, wherein the cured flour oil is a coating of methyl siloxane polymers, and the mass fraction of the hydrophobic calcium carbonate material in the modified flour oil is 5% -30%.

7. A method of preparing a modified ceramic coating comprising a modified base oil and a modified top oil, wherein the modified base oil and the modified top oil are used independently, the step of preparing the modified base oil comprising:

providing polysulfone resin particles and a base oil;

the preparation method of the modified flour oil comprises the following steps:

providing a first coating comprising a methyl siloxane-based monomer;

providing a second coating, the second coating comprising silicic acid species;

providing a lipophilic calcium carbonate material;

mixing the lipophilic calcium carbonate material and the first coating material, thereby obtaining a dispersion of the lipophilic calcium carbonate material dispersed in the first coating material;

and mixing the second coating with the dispersion liquid for a preset time to prepare the modified surface oil composed of cured surface oil and lipophilic calcium carbonate materials dispersed in the cured surface oil, wherein the cured surface oil is a coating of methyl siloxane polymers, and the mass fraction of the lipophilic calcium carbonate materials in the modified surface oil is 10% -30%.

8. A composite coating layer, characterized in that the composite coating layer comprises a base oil layer formed by modified base oil in a modified ceramic coating and a surface oil layer formed by modified surface oil in a modified ceramic coating and arranged on the base oil layer, wherein at least part of the surface oil layer is positioned at the concave part of the rough structure, wherein the modified ceramic coating is the modified ceramic coating according to any one of claims 1 to 5 or the modified ceramic coating prepared by the method for preparing the modified ceramic coating according to claim 6 or 7.

9. The composite coating of claim 8, wherein peak-to-peak spacing between adjacent projections of the roughness structure is 10 μιη -30 μιη, and/or the height of the projections is 10 μιη -20 μιη.

10. The composite coating of claim 8, wherein the topcoat layer comprises a first sub-layer having a surface with a relief structure, the first sub-layer comprising a plurality of convex hulls formed by aggregation of hydrophobic calcium carbonate material in a modified topcoat and a first non-stick layer distributed over at least the surface of the plurality of convex hulls formed by topcoat of ceramic coating in the modified topcoat, at least a portion of the first non-stick layer being located in depressions of the plurality of convex hulls.

11. The composite coating of claim 10, wherein the topcoat layer further comprises a second sub-layer disposed outside the first sub-layer, the second sub-layer comprising a second non-stick layer formed from a topcoat of a ceramic coating in a modified topcoat and a hydrophobic calcium carbonate material filled in the second non-stick layer, wherein at least a partial region of the second sub-layer is located in the depressions of the relief structure of the first sub-layer.

12. The composite coating of claim 11, wherein the first sub-layer has a thickness of 10 μm to 20 μm and the first sub-layer has a thickness of 1/3 to 2/5 of the total thickness of the composite coating.

13. The composite coating of claim 8, wherein the topcoat layer comprises a non-stick coating formed from a topcoat of a ceramic coating and a lipophilic calcium carbonate material filled in the non-stick coating.

14. A method of making a composite coating, the method comprising the steps of:

spraying modified base oil in the modified ceramic coating to form a base oil layer with a rough structure on the surface;

spraying modified surface oil in the modified ceramic paint on the bottom oil layer to form the composite coating with the surface oil layer,

Wherein at least a partial region of the oil-facing layer is located in a recess of the roughness structure, wherein the modified ceramic coating is a modified ceramic coating according to any one of claims 1 to 5 or the modified ceramic coating produced according to the method for producing a modified ceramic coating according to claim 6 or 7.

15. The method of manufacturing a composite coating according to claim 14, wherein said step of spraying with said modified base oil comprises:

and adopting modified base oil to spray a preset thickness, and drying the preset thickness for a preset time through a preset temperature surface, so as to obtain a base oil layer with a rough structure on the surface.

16. The method of manufacturing a composite coating according to claim 15, wherein the predetermined thickness is 10 μm to 30 μm.

17. A cooker, characterized in that it comprises a cooker base, and further comprises a composite coating layer according to any one of claims 8 to 13 or a composite coating layer produced according to the method for producing a composite coating layer according to any one of claims 14 to 16, formed on the cooker base.