Modified ceramic coating, preparation method thereof and container

Abstract

The invention provides a modified ceramic coating, a preparation method thereof and a container. Wherein the modified ceramic coating comprises a bottom oil layer, the bottom oil layer comprises a cross-linked product layer of a reaction product of modified polyether-ether-ketone, polysiloxane and silica sol, and the modified polyether-ether-ketone is hydroxylated polyether-ether-ketone or a derivative of the hydroxylated polyether-ether-ketone. According to the modified ceramic coating provided by the embodiment of the invention, the base oil layer is high in density and is not easy to crack and combine with odor molecules in the use process, so that peculiar smell residues can be avoided to a great extent, and the use experience of consumers can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of non-stick utensils, and particularly to a modified ceramic coating, a preparation method thereof, and a container. Background Art

[0002] When containers (such as ceramic-coated water cups) sintered after spraying ceramic coatings on the inner wall in the existing market are used to soak some drinks with their own odors (such as coffee), even if the inside is cleaned thoroughly after use, there will still be a relatively obvious coffee smell remaining. And the remaining smell usually takes a long time (generally more than half a month) to gradually dissipate. These remaining smells are obvious and "linger on", seriously affecting the user experience of consumers. Summary of the Invention

[0003] The present application aims to at least solve the problem that the smell remaining in the container after use in the above-mentioned prior art or related art is obvious and "linger on", seriously affecting the user experience of consumers.

[0004] To achieve the above object, a first aspect embodiment of the present application provides a modified ceramic coating, wherein the modified ceramic coating includes an undercoat layer, and the undercoat layer includes a crosslinked product layer of a reaction product of modified polyether ether ketone, polysiloxane, and silica sol, wherein the modified polyether ether ketone is at least one of hydroxylated polyether ether ketone and derivatives of hydroxylated polyether ether ketone.

[0005] According to the modified ceramic coating provided by the embodiment of the present application, using the crosslinked product layer of the reaction product of modified polyether ether ketone, polysiloxane, and silica sol as the undercoat layer, it is dense and not prone to cracks during use, so it is not easy to combine with odor molecules, and thus can largely avoid smell residue and improve the user experience of consumers.

[0006] In some embodiments, pigments and fillers are also dispersed in the crosslinked product layer of the reaction product of the modified polyether ether ketone, polysiloxane, and silica sol. In this way, while ensuring the density of the undercoat layer, the strength of the undercoat layer can be balanced, thereby inhibiting cracks in the undercoat to further avoid smell residue and improving the user experience of consumers.

[0007] In some embodiments, based on the total weight of the undercoat layer being 100%, the weight of the crosslinked product layer of the reaction product of the modified polyether ether ketone, polysiloxane, and silica sol accounts for 60% - 70% of the total weight of the undercoat layer, and the weight of the pigments and fillers accounts for 30% - 40% of the total weight of the undercoat layer. In this way, while ensuring the density of the undercoat layer, the strength of the undercoat layer can be optimized, thereby inhibiting cracks in the undercoat to further avoid smell residue and improving the user experience of consumers.

[0008] In some embodiments, the pigment and filler include pigments and fillers. The pigments include at least one of titanium dioxide, carbon black, copper chromite black, iron oxide, pigment brown, and pigment orange. The fillers include at least one of bentonite, kaolin, mica powder, montmorillonite, silicon carbide, alumina, and silica. Thus, while ensuring the density of the primer layer, the strength of the primer layer can be further optimized, thereby suppressing primer cracks to further avoid odor residue and ensuring the color of the primer layer to enhance the consumer experience.

[0009] In some embodiments, the weight ratio of the pigment to the filler is 1:2 - 2:1. When the pigment and the filler have a suitable weight ratio, it can balance the improvement of strength and color to a certain extent without overly affecting the density of the primer layer.

[0010] In some embodiments, the modified ceramic coating further includes a topcoat layer formed on the primer layer; wherein, the topcoat layer is a crosslinked product layer of a conversion product of polysiloxane and silica sol, or the topcoat layer is a polymer of dimethylsiloxane and silica, a crosslinked product layer of a conversion product of polysiloxane and silica sol.

[0011] In these embodiments, the modified ceramic coating has a bilayer structure, which can further utilize the advantages of the modified polyetheretherketone in the primer. When there is no modified polyetheretherketone in the primer, gaps may appear due to thermal expansion of the primer, and cracks may also appear in the relatively thin topcoat, which cannot block the gaps. However, when the primer contains modified polyetheretherketone, the influence of high-temperature thermal expansion on the coating cracks is not obvious, and a small amount of gaps that appear in the primer can be further sealed after applying the topcoat.

[0012] According to the second aspect of the present application, a container is provided, wherein the container includes a container body and a modified ceramic coating formed on the inner wall surface of the container body, and the modified ceramic coating is the modified ceramic coating described above.

[0013] In some embodiments, the container is the inner liner of a cup, a cooking pot, or a kettle, and the applicable product types are diverse, which can provide diverse product types.

[0014] According to the third aspect of the present application, a method for preparing a modified ceramic coating is provided, wherein the method for preparing the modified ceramic coating includes the following steps: forming a mixed slurry including modified polyetheretherketone, polysiloxane, and silica sol, wherein the modified polyetheretherketone is at least one of hydroxylated polyetheretherketone and derivatives of hydroxylated polyetheretherketone; ripening the mixed slurry to obtain a liquid coating in which a reaction product including modified polyetheretherketone, polysiloxane, and silica sol is dispersed in a solvent as a primer coating; spraying the primer coating and sintering it so that the reaction products in the primer coating crosslink and cure to form a primer layer as the modified ceramic coating.

[0015] According to the preparation method of the modified ceramic coating provided by the embodiments of the present application, in the primer paint, the modified polyetheretherketone will form in the pores of the polymethylsiloxane-silica sol network structure during the sol-gel reaction of the polymethylsiloxane and the silica sol, and react with the polymethylsiloxane, making the main film-forming substances (the reaction products of the modified polyetheretherketone, polysiloxane and silica sol) in the primer paint as a whole denser. As a result, the density of the formed primer layer is increased, and the container with this primer layer is not prone to cracks during use, especially not prone to cracking the topcoat layer due to its own gaps, so it is not easy to combine with odor molecules, and thus can largely avoid taste residue and improve the user experience of consumers. In addition, the heat resistance of the main film-forming substances themselves is better. In this way, the heat resistance of the primer layer formed by them can also be improved. Therefore, when soaking in odoriferous liquids (for example, making coffee), it is not easy to cause the "thermal expansion" of the primer layer, and thus the possibility of cracks in the primer layer due to "thermal expansion" can be reduced.

[0016] In some embodiments, in the mixed slurry, the weight ratio of the modified polyetheretherketone, the polysiloxane and the silica sol is (0.1 - 0.5):(30 - 40):(10 - 15). Specifically, in the mixed slurry, the weight portion of the modified polyetheretherketone is 0.2 parts - 1.0 part, the weight portion of the polysiloxane is 30 parts - 40 parts, the weight portion of the silica sol is 10 parts - 15 parts, and the weight portion of the solvent is 10 parts - 30 parts.

[0017] In these embodiments, the modified polyetheretherketone, polysiloxane and silica sol in the mixed slurry have a suitable weight ratio, which is conducive to the formation of the main film-forming substances (the reaction products of the modified polyetheretherketone, polysiloxane and silica sol) after curing and during the formation of the modified ceramic coating, so as to improve the anti-odor performance while ensuring the non-stick property of the modified ceramic coating.

[0018] In some embodiments, the formation of the mixed slurry including the modified polyetheretherketone, polysiloxane and silica sol includes mixing the modified polyetheretherketone and the silica sol, adjusting the pH value to 3 - 6, and then adding the polysiloxane to form a mixed slurry including polyetheretherketone, polysiloxane and silica sol, so as to prepare for the curing of the mixed slurry.

[0019] In some embodiments, the step of curing the mixed slurry includes: stirring the mixed slurry at a temperature of 15°C - 25°C for 4h - 10h and maintaining the pH value at 3 - 6 to cure the mixed slurry, so as to be more conducive to the formation of the reaction products of the modified polyetheretherketone, polysiloxane and silica sol.

[0020] In some embodiments, the mixed slurry further includes a pigment extender and a solvent. Among them, in the mixed slurry, the weight parts of the modified polyether ether ketone are 0.1 part - 0.5 part, the weight parts of the polysiloxane are 30 parts - 40 parts, the weight parts of the silica sol are 10 parts - 15 parts, the weight parts of the pigment extender are 20 parts - 30 parts, and the weight parts of the solvent are 10 parts - 30 parts. The inclusion of a certain amount of pigment extender in the mixed slurry for forming the base oil coating can enhance the strength and color of the base oil layer formed by the base oil coating without significantly affecting the compactness of the base oil layer formed by the base oil coating as much as possible. Detailed Description

[0021] The following detailed description is provided to assist the reader in obtaining a comprehensive understanding of the methods, apparatuses, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to those set forth herein, but may be changed as will be apparent after understanding the disclosure of this application, except for operations that must occur in a specific order. In addition, descriptions of features known in the art may be omitted for greater clarity and conciseness.

[0022] The ceramic coating includes a single - system or a dual - system ceramic coating. The single - system ceramic coating only includes the top - coat paint, and the dual - system ceramic coating includes a base - coat paint and a top - coat paint that are placed independently and used separately.

[0023] The existing ceramic coating is a liquid coating with the reaction product (siloxane - type polymer) formed by polysiloxane and silica sol as the main non - sticky component. When a container (e.g., a ceramic - coated water cup) with the ceramic coating sprayed on the inner wall and sintered is soaked in some drinks with a self - contained odor (e.g., coffee), even if the inside of the container is cleaned thoroughly after use, a relatively obvious coffee smell will still remain, and the remaining smell usually takes a long time (generally more than half a month) to gradually dissipate. These remaining smells are obvious and "linger", seriously affecting the user experience of consumers.

[0024] After the existing ceramic coating is air - sprayed and sintered, the formed coating is prone to physically adsorb odor molecules, resulting in obvious and "long - lasting" remaining smells in the container (cup). The inventor found through research that this is mainly because the coating has relatively large pores and is prone to cracks when used at normal high temperatures, so that odor molecules are easily adsorbed in the corresponding pores and cracks.

[0025] Specifically, the coating includes a primer layer and a topcoat layer formed on the primer layer. In the case where the primer layer has cracks, although the topcoat layer has the function of covering the "crack" defect of the primer layer, since the topcoat layer is usually thin, generally only 3 to 6 microns, the relatively thin topcoat layer still cannot effectively and durably inhibit the continuous extension of the "crack" defect of the primer layer, thus making it easy for cracks to appear successively in the topcoat layer.

[0026] In the present application, by mixing and curing modified polyether ether ketone, polysiloxane and silica sol, a liquid coating formed by dispersing the reaction product including modified polyether ether ketone, polysiloxane and silica sol in a solvent is used as the primer coating. In the primer coating, the reaction product is used as the main film-forming substance. When the primer coating is sprayed on the container body to form a primer layer, the main film-forming substance (sol-gel) in the primer coating will crosslink with each other under the action of the temperature in the sintering stage, thereby forming a dense primer layer as a modified ceramic coating according to the present application.

[0027] According to the first aspect of the present application, there is provided a modified ceramic coating, which is at least used for cups. Among them, the modified ceramic coating uses a liquid coating formed by dispersing the reaction product including modified polyether ether ketone, polysiloxane and silica sol in a solvent as the primer coating, and the reaction product is used as the main film-forming substance of the primer coating. Among them, the modified polyether ether ketone is at least one of hydroxylated polyether ether ketone and derivatives of hydroxylated polyether ether ketone.

[0028] In the present application, the main film-forming substance refers to the substance in the primer coating that can independently form a dry film with a certain strength and continuity, that is, the substance that remains in the primer layer to provide certain properties (for example, non-stickiness, denseness).

[0029] According to the modified ceramic coating provided by the embodiments of the present application, the primer layer formed by the primer coating has a high density, is not prone to cracks during use, and is not easily combined with odor molecules. Therefore, it can largely avoid odor residue, thereby improving the user experience of consumers.

[0030] According to the present application, the modified polyether ether ketone is specifically reduced modified polyether ether ketone or a derivative of reduced modified polyether ether ketone. According to some embodiments, the modified polyether ether ketone is specifically at least one of hydroxylated polyether ether ketone (polyether ether ketone containing hydroxyl) and derivatives of hydroxylated polyether ether ketone. Here, the hydroxylated polyether ether ketone is a compound in which at least part of the carbonyl groups on the surface of the polyether ether ketone are replaced by hydroxyl groups, and the derivative of hydroxylated polyether ether ketone is a compound in which the carbonyl groups on the surface of the derivative of polyether ether ketone are replaced by hydroxyl groups.

[0031] In some embodiments, the hydroxylated polyether ether ketone is obtained by chemically converting the carbonyl groups on the surface of PEEK into hydroxyl groups, thereby obtaining hydroxylated polyether ether ketone.

[0032] In some embodiments, the derivative of hydroxylated polyetheretherketone may include a hydroxylated polyetheretherketone / hydroxyapatite (HA) composite material, or the derivative of hydroxylated polyetheretherketone is obtained by copolymerizing a monomer containing a hydroxyl group with a PEEK monomer, thereby obtaining a derivative of hydroxylated polyetheretherketone.

[0033] According to the present application, polysiloxane can undergo a sol-gel reaction with silica sol and modified polyetheretherketone to form a polysiloxane polymer as the main film-forming substance in the primer coating. According to some exemplary embodiments of the present application, the polysiloxane may include at least one of polymethylsiloxane, polymethylphenylsiloxane, and polyethylsiloxane.

[0034] According to the present application, the polysiloxane can be obtained commercially or prepared from certain monomers. Taking polymethylsiloxane as an example, its core structural unit is formed by polymerizing methylsilane substances, and the methylsilane substances may include at least one of methyltrimethoxysilane, methyltriethoxysilane, and dimethyldimethoxysilane, but are not limited thereto. In addition, in addition to including methylsilane substances, tetraethyl orthosilicate for polycondensing to form polysiloxane may also be included. Here, tetraethyl orthosilicate plays a role in promoting the growth and crosslinking of the polysiloxane chain, thereby contributing to the formation of a more complex and stable polymer structure. Specifically, the process of synthesizing polymethylsiloxane includes a hydrolysis stage and a polycondensation stage. In the hydrolysis stage, the methylsilane substances and tetraethyl orthosilicate undergo a hydrolysis reaction in the presence of water to generate corresponding silanol intermediates. Subsequently, in the polycondensation stage, these silanol intermediates are connected to each other through dehydration condensation reactions to form a polysiloxane chain. By weight percentage, the weight portion of the methylsilane substances is 85 parts - 95 parts, the weight portion of tetraethyl orthosilicate is 5 parts - 15 parts, and an appropriate amount of water.

[0035] According to the present application, the silica sol can be obtained commercially. According to some embodiments, substances with CAS numbers 7631-86-9 (silicon dioxide), 112945-52-5 (fumed silica), and 14808-60-7 (silica sol) can all be used as the silica sol.

[0036] According to the modified ceramic coating of the present application, after the primer coating is cured, it has a certain amount of reaction products of modified polyetheretherketone, polysiloxane and silica sol as the main film-forming substances, so as to improve the anti-odor performance while ensuring the non-stick property of the modified ceramic coating. Here, the reaction products of modified polyetheretherketone, polysiloxane and silica sol are specifically the products formed by the chemical combination of polyetheretherketone, polymethylsiloxane and silica sol with each other. When the primer coating is sprayed to form a primer layer, as the solvent and the like volatilize, the reaction products of modified polyetheretherketone, polysiloxane and silica sol can further crosslink and form a large number of crosslinked products formed by the crosslinking reaction of polyetheretherketone, polymethylsiloxane and silica sol as the coating of the container. The coating is dense and not easy to crack, so it can ensure that the container is not easy to leave residues during use, further improving the user experience of consumers.

[0037] According to some embodiments of the present application, the primer coating is composed of a main film-forming substance and a solvent. Calculated based on the total weight of the primer coating being 100%, the reaction products account for 40% - 55% of the total weight of the primer coating, and the balance is the solvent. In this way, a dense primer layer can be formed through this primer coating, enabling the container with this primer layer to be not easy to combine with odor molecules during use. According to some other embodiments of the present application, the primer coating mainly consists of a film-forming substance, a pigment extender and a solvent. Calculated based on the total weight of the primer coating being 100%, the weight of the reaction products accounts for 40% - 55% of the total weight of the primer coating, the weight of the pigment extender accounts for 20% - 30% of the total weight of the primer coating, and the balance is the solvent. In this way, not only can a dense primer layer be formed through this primer coating, enabling the container with this primer layer to be not easy to combine with odor molecules during use, but also the formed primer layer can have a certain color and / or wear resistance. It should be noted that the pigment extender here can be a pigment and / or a filler. As an example, the pigment can be at least one of titanium dioxide, carbon black, copper chromite black, iron oxide, pigment brown and pigment orange, etc., and the filler can be selected from at least one of bentonite, kaolin, mica powder, montmorillonite, silicon carbide, alumina and silica.

[0038] According to the present application, the modified ceramic coating can also be a two-component coating, that is, the ceramic coating includes a primer coating and a topcoat coating that are used independently and placed separately. Here, the primer coating is the primer coating provided in the above embodiments, and the topcoat coating can adopt an existing topcoat coating. The two-component coating will first form a primer layer through the primer coating. Such a primer layer can provide a "solid" and dense foundation for the topcoat layer. Then, a topcoat layer is formed on the primer layer through the topcoat coating. The topcoat layer can further seal the cracks caused by high temperature and the like in the primer layer during use, that is, further reduce the possibility of gaps that can combine with odor molecules appearing on the exposed surface of the ceramic coating.

[0039] According to the present application, the primer coating and the topcoat coating are coatings formed by mixing various required components when needed. Specifically, before curing, each component can be stored separately. For example, polyether ether ketone, polymethylsiloxane, and silica sol can be diluted in corresponding solvents respectively and stored separately as the raw material part of the primer coating for forming the modified ceramic coating. As an example, the solvent can be isopropanol, pure water, ethanol, etc., which can facilitate the formation of a uniformly mixed slurry. When curing is required, the diluted substances are mixed to form the modified ceramic coating. In this way, the uniformity and stability of the coating can be ensured, and the risk of problems such as unevenness and instability of the coating can be reduced. It should be noted that according to the present application, after curing, the primer coating and the topcoat coating can undergo chemical reactions to the maximum extent within a certain period of time to exert their performance and advantages, thereby ensuring the quality and stability of the coating. As an example, the storage time of the cured primer coating and topcoat coating does not exceed 72 hours.

[0040] In some preferred embodiments, the topcoat coating includes a dispersion solvent and a siloxane polymer dispersed in the dispersion solvent. Among them, the siloxane polymer can include the conversion product of polysiloxane and silica sol, or the siloxane polymer can also include the polymer of dimethylsiloxane and silicon dioxide, and the conversion product of polysiloxane and silica sol.

[0041] When the siloxane polymer includes the conversion product of polysiloxane and silica sol, based on the total weight of the topcoat coating being 100%, the weight of the conversion product of polysiloxane and silica sol accounts for 60%-80% of the total weight of the topcoat coating, and the balance is the dispersion solvent. That is, the topcoat coating can be a coating in which the reaction product of polysiloxane and silica sol is dispersed in the dispersion solvent.

[0042] As is well known, the carbonyl and amino groups in the odor substances (such as ketones, esters, aldehydes, and nitrogen-containing pyridine compounds) in coffee substances are good hydrogen bond acceptors. When the coating formed by the ceramic coating has a large number of hydroxyl groups, it can act as a hydrogen bond donor, contact with beverages having a large number of hydrogen bond donors and easily adsorb the odor substances in these beverages (for example, the odor substances in coffee substances). That is, the beverage containing a hydrogen bond acceptor (such as certain components in coffee) forms a hydrogen bond with the coating surface, resulting in the ceramic-coated water cup being prone to residual coffee odor even after being cleaned.

[0043] The inventors found that the modified ceramic coating of the present application can be obtained by blocking the formation of groups (hydroxyl groups) of hydrogen bond donors during the formation of the ceramic coating, so as to minimize the number of hydrogen bond donors in the formed modified ceramic coating, thereby ensuring that the cup is not easily adsorbed with coffee-like odor substances due to hydrogen bond action during use, avoiding taste residue, and improving the user experience of consumers.

[0044] As other examples, the modified topcoat paint includes a dispersion solvent and a polymer of dimethylsiloxane and silica, a conversion product of polysiloxane and silica sol, which are dispersed in the dispersion solvent. Based on the total weight of the topcoat paint being 100%, the weight of the polymer of dimethylsiloxane and silica, the conversion product of polysiloxane and silica sol accounts for 60% - 80% of the total weight of the topcoat paint, and the balance is the dispersion solvent. That is, the topcoat paint can be a paint in which the polymer of dimethylsiloxane and silica, the conversion product of polysiloxane and silica sol are dispersed in the dispersion solvent. Here, the dispersion solvent can be at least one of water and an organic solvent. Here, the organic solvent can be isopropanol, ethanol or propanol. In a preferred embodiment, the organic solvent is isopropanol because isopropanol can play a better dispersion role in the upcoming reaction.

[0045] In the above embodiments, the conversion product of polysiloxane and silica sol, the polymer of dimethylsiloxane and silica, the conversion product of polysiloxane and silica sol can ensure the non-stick performance of the topcoat layer. Additionally, compared with other existing topcoat paints, the modified topcoat paint does not contain substances such as fillers and pigments (which form a transparent coating after sintering), and is only made of silane materials (the conversion product of polysiloxane and silica sol, the polymer of dimethylsiloxane and silica, the conversion product of polysiloxane and silica sol), so it can have improved non-stickiness. Moreover, since the modified topcoat paint does not have fillers, pigments, etc. (these pigments and fillers are powder inorganic substances and do not participate in the reactions during the curing process), the formed topcoat layer naturally does not have powder inorganic substances such as pigments and fillers embedded in the coating. Therefore, it can have increased surface density due to the absence of doped particles, and reduce the inducement of forming its own gaps (doping with powder inorganic substances such as pigments and fillers). Even during later use, it is not easy to appear gaps or make the gaps expand further, and there will be no part where the powder inorganic substances such as pigments and fillers contact and adsorb with odor molecules, so it can further reduce the coffee-like odor substances adsorbed at the initial stage of container use, avoid taste residue, and ensure the persistence of the anti-odor performance, enhancing the consumer experience.

[0046] In addition, the topcoat paint in which the polymer of dimethylsiloxane and silica, the conversion product of polysiloxane and silica sol are dispersed in the dispersion solvent can have a relatively small number of hydrogen bond donors. Thus, during use, due to the small number of hydrogen bond donors, the probability of odor substances in the beverage (such as odor substances in coffee) binding to the coating surface is reduced. Therefore, it can largely avoid taste residue and enhance the consumer experience.

[0047] In addition, it should be noted that the degrees of polymerization of the polysiloxanes forming the topcoat and the primer are different. Specifically, the degree of polymerization of the polysiloxane forming the topcoat is greater than that of the polysiloxane forming the primer. In this way, the topcoat layer has better non-stick properties, while the primer layer will not affect its bonding strength as a primer layer between the container body and the topcoat layer due to overly good non-stick effect. As a specific example, the degree of polymerization of the polysiloxane forming the topcoat is 1700 - 2100, and the degree of polymerization of the polysiloxane forming the primer is 1300 - 1800.

[0048] According to the second aspect of the present application, a method for preparing a modified ceramic coating is provided, wherein the method for preparing the modified ceramic coating includes:

[0049] Step S101, forming a mixed slurry including a modified polyetheretherketone, a polymethylsiloxane, and a silica sol, wherein the modified polyetheretherketone is at least one of a hydroxylated polyetheretherketone and a derivative of a hydroxylated polyetheretherketone.

[0050] Step S102, aging the mixed slurry to obtain a liquid coating formed by dispersing the reaction product of the modified polyetheretherketone, the polysiloxane, and the silica sol in a solvent as the primer coating, thereby preparing the modified ceramic coating.

[0051] According to the method for preparing a modified ceramic coating provided by the embodiments of the present application, in the primer coating thereof, the modified polyetheretherketone will form in the pores of the polymethylsiloxane-silica sol network structure and react with the polymethylsiloxane during the sol-gel reaction of the polymethylsiloxane and the silica sol, making the main film-forming substances (the reaction product of the modified polyetheretherketone, the polysiloxane, and the silica sol) in the primer coating as a whole more dense. As a result, the density of the formed primer layer is increased, and the container with this primer layer is not likely to crack during use, especially not likely to crack the topcoat layer on it due to its own cracks, and thus not likely to combine with odor molecules. Therefore, it can largely avoid odor residue and improve the user experience of consumers. In addition, the heat resistance of the main film-forming substances themselves is better. In this way, the heat resistance of the primer layer formed by them can also be improved. Therefore, when brewing an odoriferous liquid (for example, making coffee), it is not likely to cause the primer layer to "expand due to heat", thereby reducing the possibility of cracks in the primer layer due to "thermal expansion".

[0052] In the embodiments of the present application, the reaction product of the modified polyetheretherketone, the polysiloxane, and the silica sol is specifically the reaction product of the pairwise reaction of the modified polyetheretherketone, the polysiloxane, and the silica sol, in other words, the reaction product of the mutual combination of the modified polyetheretherketone, the polysiloxane, and the silica sol.

[0053] Next, the preparation method of the primer coating in the modified ceramic coating according to the present application will be described in conjunction with specific embodiments. Method.

[0054] Forming modified polyether ether ketone

[0055] According to the present application, the modified polyether ether ketone is specifically a reduced modified polyether ether ketone or a derivative of a reduced modified polyether ether ketone. According to some embodiments, the modified polyether ether ketone is at least one of hydroxylated polyether ether ketone (polyether ether ketone containing hydroxyl groups) and derivatives of hydroxylated polyether ether ketone. Here, the hydroxylated polyether ether ketone is a compound in which at least part of the carbonyl groups on the surface of polyether ether ketone are replaced by hydroxyl groups, and the derivative of hydroxylated polyether ether ketone is a compound in which the carbonyl groups on the surface of the derivative of polyether ether ketone are replaced by hydroxyl groups.

[0056] According to the present application, the formation method of the modified polyether ether ketone includes reducing the carbonyl groups on the surface of polyether ether ketone (PEEK) to hydroxyl groups by using a strong reducing agent. Here, the strong reducing agent can be lithium aluminum hydride or sodium borohydride, which can realize the conversion of a ketone (a compound containing a carbonyl C=O) to a hydroxyl group (-OH), thereby obtaining the modified polyether ether ketone. In a preferred embodiment, the strong reducing agent is preferably sodium borohydride. Using sodium borohydride NaBH 4 to provide electrons, it can dissociate H - ions under mild conditions. These H - ions have strong nucleophilicity and can perform a nucleophilic addition reaction on the positive charge center. The H - ions can directly provide electrons to reduce the carbonyl group to a hydroxyl group.

[0057] To make the reduction reaction proceed smoothly, a suitable solvent and an appropriate reaction temperature can be selected. As an example, the solvent can be dimethyl sulfoxide (DMSO). As a non-polar solvent, it has a good affinity with the PEEK material surface. The reaction temperature is 100°C - 120°C, and the solubility of NaBH 4 in DMSO reaches the maximum. In this way, it is beneficial to the progress of the reduction reaction.

[0058] In these embodiments, compared with polyether ether ketone, the modified polyether ether ketone has hydroxyl groups that can react with polydimethylsiloxane. During the process of the reaction between polydimethylsiloxane and silica sol to form a network structure, it can be grafted onto polydimethylsiloxane and silica sol to jointly form the main film-forming substance. In addition, the modified polyether ether ketone has good hydrophilicity during the preparation of the primer coating, which is beneficial to its solubility in the mixed slurry.

[0059] Forming a mixed slurry

[0060] According to the present application, forming a mixed slurry including modified polyetheretherketone, polymethylsiloxane and silica sol includes stirring and mixing the modified polyetheretherketone, polymethylsiloxane and silica sol to obtain the mixed slurry. In the mixed slurry, based on 100 parts by weight of the total weight of the mixed slurry, the weight parts of the modified polyetheretherketone are 0.1 part - 0.5 part, the weight parts of the polymethylsiloxane are 30 parts - 40 parts, and the weight parts of the silica sol are 10 parts - 15 parts.

[0061] In these embodiments, the modified polyetheretherketone, polysiloxane and silica sol in the mixed slurry have appropriate weight parts, which can facilitate the formation of the main film-forming substance (the reaction product of the modified polyetheretherketone, polysiloxane and silica sol) after curing and during the process of forming the modified ceramic coating, so as to improve the anti-odor performance while ensuring the non-stickiness of the modified ceramic coating.

[0062] In some embodiments, the step of forming a mixed slurry including modified polyetheretherketone, polysiloxane and silica sol includes: mixing the modified polyetheretherketone and silica sol, adjusting the pH value to 3 - 6, and then adding the polysiloxane to form a mixed slurry including polyetheretherketone, polysiloxane and silica sol. In the present application, at least one organic acid such as formic acid and acetic acid can be used to adjust the pH value. Specifically, the modified polyetheretherketone, silica sol and organic acid are mixed and stirred for 0.5 h - 2 h to make the modified polyetheretherketone, silica sol and organic acid fully mixed and uniform, and then the polysiloxane is added and stirred to make it roll and mix for 4 h - 10 h to make the polysiloxane react with the silica sol and the modified polyetheretherketone under acidic conditions.

[0063] In some embodiments, the step of curing the mixed slurry includes: stirring the mixed slurry at a temperature of 15°C - 25°C for 4 h - 10 h and maintaining the pH value at 3 - 6 to cure the mixed slurry, so as to be more conducive to the formation of the reaction product of the modified polyetheretherketone, polysiloxane and silica sol.

[0064] In some embodiments, the mixed slurry further includes a pigment filler and a solvent. Among them, based on 100 parts by weight of the total weight of the mixed slurry, the weight parts of the pigment filler are 20 parts - 30 parts, and the weight parts of the solvent are 10 parts - 30 parts. Here, the pigment filler may include a pigment and / or a filler. The pigment is used to provide the color of the base oil layer, and the filler is used to provide the hardness, strength, etc. of the base oil layer. As a specific example, the pigment can be titanium dioxide. The filler can be at least one of bentonite and kaolin. When the pigment filler includes a pigment and a filler, the weight ratio of the pigment to the filler can be 1:5 - 2:1. The solvent can be at least one of water and an organic solvent, where the organic solvent can include isopropanol and ethanol. When the solvent includes water and an organic solvent, the present application does not limit the mixing ratio of the two.

[0065] Hereinafter, a method for preparing a topcoat paint in a modified ceramic paint according to the present application will be described in conjunction with specific embodiments.

[0066] According to the present application, the modified ceramic paint can be a two-component paint, that is, the ceramic paint includes a primer paint and a topcoat paint that are used independently and stored separately. The two-component paint first forms a primer layer through the primer paint, and then, a topcoat layer is formed on the primer layer through the topcoat paint. The addition of the topcoat layer can further seal the cracks that occur in the primer layer during use due to, for example, high temperature, that is, further reduce the possibility of gaps that can bind to odor molecules appearing on the exposed surface of the ceramic paint.

[0067] According to the present application, the primer paint is the primer paint provided in the above embodiments. The topcoat paint can use an existing topcoat paint. Preferably, the topcoat paint can be a modified topcoat paint.

[0068] In some preferred embodiments according to the present application, the topcoat paint can be a modified topcoat paint. Among them, as some examples, the modified topcoat paint includes a dispersion solvent and a conversion product of polysiloxane and silica sol dispersed in the dispersion solvent. The corresponding method for preparing the modified topcoat paint includes forming a dispersion liquid including polysiloxane, forming a dispersion liquid including silica sol, and mixing the dispersion liquid of polysiloxane and the dispersion liquid of silica sol to form the modified topcoat paint. As other examples, the modified topcoat paint includes a dispersion solvent and a polymer of dimethylsiloxane and silica, a conversion product of polysiloxane and silica sol dispersed in the dispersion solvent. The corresponding method for preparing the modified topcoat paint includes forming a dispersion liquid including polysiloxane, forming a dispersion liquid including silica sol, and forming a dispersion liquid including a polymer of dimethylsiloxane and silica, and mixing the dispersion liquid of polysiloxane, the dispersion liquid of silica sol, and the dispersion liquid of the polymer of dimethylsiloxane and silica to form the modified topcoat paint.

[0069] Hereinafter, taking the modified topcoat paint including a dispersion solvent and a polymer of dimethylsiloxane and silica, a conversion product of polysiloxane and silica sol dispersed in the dispersion solvent as an example, the method for preparing the modified topcoat paint of the present application will be specifically described.

[0070] According to the present application, a method for preparing a modified topcoat paint is provided, wherein the method for preparing the modified topcoat paint includes:

[0071] Step S201, forming a mixed slurry including a polymer of dimethylsiloxane and silica, polymethylsiloxane, and silica sol. In the mixed slurry, the weight ratio of polymethylsiloxane, silica sol, and the polymer of dimethylsiloxane and silica is (25-30):(5-10):(30-40).

[0072] Step S202: Stir and mix the mixed slurry to obtain the matured modified topcoat paint as the topcoat paint of the present application.

[0073] According to the method for preparing a modified topcoat paint provided by an embodiment of the present application, the modified topcoat paint is obtained by mixing and maturing a mixed slurry including a polymer of dimethylsiloxane and silicon dioxide, polymethylsiloxane, and silica sol. Compared with the existing topcoat paint, the modified topcoat paint obtained by mixing and maturing the above raw materials can provide a relatively small number of hydrogen bond donors in the formed coating. Thus, when in use, due to the small number of hydrogen bond donors, the probability of the odor substances in the beverage (such as the odor substances in coffee) binding to the coating surface is reduced. Therefore, taste residue can be largely avoided, and the use experience of consumers can be improved.

[0074] Hereinafter, the method for preparing a modified topcoat paint according to the present application will be described in combination with specific steps.

[0075] Form a mixed slurry

[0076] According to the present application, the polysiloxane is one of polymethylsiloxane, polymethylphenylsiloxane, and polyethylsiloxane, and the raw materials for forming the modified topcoat paint include silica sol in a liquid state that can be commercially obtained. In some embodiments, the polymethylsiloxane selected has a viscosity in the range of 6 seconds to 12 seconds when tested with an Iwata No. 2 cup. In the topcoat layer, most of the polymethylsiloxane will hydrolyze to form a network structure. The polymethylsiloxane has improved non-stickiness (provided by methyl), and the network structure formed by it is easy to lock the silica molecules generated by silica sol, that is, the silica molecules generated by silica sol are easy to fill into the network structure to form the main film-forming substance skeleton of the whole.

[0077] In addition, among the raw materials of the modified topcoat paint, the weight proportion of polymethylsiloxane is relatively small, and it should not be too much or too little. If the weight portion of polymethylsiloxane in the raw materials of the modified topcoat paint is too much, there will be more hydroxyl groups in the formed coating, which can serve as hydrogen bond donors. In this case, it will be unfavorable for the purpose of reducing the hydrogen bond donors in the coating of the present application. If the weight portion of polymethylsiloxane in the raw materials of the modified topcoat paint is too little, the performance of the formed coating will be affected. For example, properties such as water resistance, weather resistance, and hardness will decline.

[0078] According to the present application, the reaction product of dimethyl (siloxane and polysiloxane) and silica, also known as the polymer of dimethylsiloxane and silica, i.e., CAS: 67762-90-7, has hydrophobicity, chemical stability and mechanical strength, and can embed silane functional groups on the surface of silica formed by silica sol, thereby generating a stable chemically bonded silane product. Here, the polymer of dimethylsiloxane and silica can be obtained commercially or can be prepared by the following preparation method. As an example, dimethylsiloxane and chlorosilane (such as trichlorosilane (SiHCl 3 )), trichloromethylsilane (CH 3 SiCl 3 ) etc.) are subjected to a hydrolysis reaction under the catalysis of hydrochloric acid to obtain the polymer of dimethylsiloxane and silica.

[0079] According to the present application, the polymer of dimethylsiloxane and silica provides non-stickiness (provided by methyl) on the one hand, and on the other hand can react with silica sol hydrolysis to form SiO 2 , ensuring the integrity of the modified surface oil coating, and not introducing hydrogen bond donors by itself. At the same time, it can reduce the brittleness of the formed modified ceramic coating to improve the strength and has good adhesion to the bottom oil layer, thereby improving the overall strength of the modified ceramic coating.

[0080] It should be noted that in the mixed slurry, there may also be raw materials such as solvents. The solvent is used to adjust the viscosity of the modified surface oil coating so that the coating can be better constructed and coated on the surface of the cup substrate. The filler is used to adjust the appearance of the final coating product. As an example, the solvent can be isopropyl alcohol, pure water or ethanol, etc.

[0081] According to the present application, after preparing each raw material, mixing is carried out. Specifically, a mixed slurry including the polymer of dimethylsiloxane and silica, polymethylsiloxane and silica sol is formed, including mixing the polymer of dimethylsiloxane and silica and silica sol, and then adding polymethylsiloxane, thereby forming a mixed slurry including the polymer of dimethylsiloxane and silica, polymethylsiloxane and silica sol.

[0082] In these embodiments, first, the polymer of dimethylsiloxane and silica and silica sol are mixed evenly to ensure the uniform distribution of these two components in the system. The silica sol can act as a crosslinking agent here and can undergo a condensation reaction with the hydroxyl groups in the polymer of dimethylsiloxane and silica to form a preliminary crosslinked network. Next, polymethylsiloxane is added. At this time, since the reactivity between polymethylsiloxane and silica sol is higher than that between polymethylsiloxane and the polymer of dimethylsiloxane and silica, polymethylsiloxane will react with silica sol preferentially to further expand and strengthen the crosslinked network. This reaction may involve the condensation between the methyl groups in polymethylsiloxane and the hydroxyl groups in silica sol to form more stable silicon-oxygen-silicon bonds. By this method of stepwise mixing and reaction, a more uniform and dense crosslinked network can be formed, thereby improving the strength, durability and other physical properties of the coating. In addition, this method also helps to control the reaction rate and reduce the generation of by-products, thus optimizing the overall performance of the product.

[0083] According to the present application, during the mixing process, the pH value of the mixed slurry system is maintained within the range of 5 - 7, and the temperature is 20°C - 30°C. Under these conditions, it is possible to promote the formation of the matured modified topcoat paint.

[0084] According to the present application, in the step of stirring and mixing, the temperature in the mixing step is controlled to be 20°C - 30°C, and the mixing time is 8h - 12h. Specifically, the mixed slurry is added to the mixing device, and by controlling the temperature of the mixing device and the stirring device of the mixing device, the mixed slurry is mixed and stirred at a temperature of 20°C - 30°C for 8h - 12h to ensure that the components in the paint are fully mixed. During the mixing process, the polymer of dimethylsiloxane and silica, polymethylsiloxane and silica sol interact to form reaction products. In the subsequent sintering stage after the formation of the coating, the reaction products crosslink with each other, thereby forming a modified topcoat paint according to the present application that is not easily hydrogen-bonded to other substances. The topcoat layer formed by the modified topcoat paint not only has excellent odor-proof performance but also has excellent physical properties such as strength, hardness and wear resistance.

[0085] According to the present application, the mixed slurry includes the polymer of dimethylsiloxane and silica, polymethylsiloxane and silica sol. Among them, in terms of parts by weight, the weight parts of polymethylsiloxane are 3 parts - 5 parts, the weight parts of silica sol are 20 parts - 35 parts, and the weight parts of the polymer of dimethylsiloxane and silica are 20 parts - 35 parts. In some embodiments, the mixed slurry further includes titanium dioxide, pigment brown and solvent, wherein the weight parts of titanium dioxide are 10 parts - 20 parts, the weight parts of pigment brown are 1 part - 2 parts, and the weight parts of the solvent are 10 parts - 30 parts.

[0086] In these embodiments, titanium dioxide is usually white and pigment brown is usually black. By setting appropriate weight ratios of the two, a modified topcoat paint with the desired color can be formed, thereby obtaining a coating for the cup with the desired color. The cured modified topcoat paint formed from the above multi-component mixed slurry can ensure that the modified topcoat paint has an appropriate viscosity, avoid sagging during spraying to form a coating, and ensure the quality of the coating. In addition, it can also ensure the stability and uniformity of the formed modified topcoat paint.

[0087] Curing is a key step in the preparation of ceramic coatings. It involves chemical reactions and physical changes of various components in the coating to form a stable coating system. During this process, pH value and stability are two very important parameters, which directly affect the quality and performance of the coating.

[0088] Specifically, the molecular formula of silica sol can be written as Si(OH) 4 , and -OH can also be called a hydroxyl group. During the sintering process, silica sol will decompose into SiO 2 . When polymethylsiloxane reacts with silica to form a silica polymer with methyl groups, and when the polymer of dimethylsiloxane and silica and silica are mixed and reacted under the action of temperature, the hydroxyl groups on the surface of silica sol will chemically react with the methyl groups on the molecular chain of the polymer of dimethylsiloxane and silica to form a binary cross-linked structure. That is, after sintering, a modified ceramic coating mainly composed of the conversion product of the polymer of dimethylsiloxane and silica, polymethylsiloxane and silica sol combined with each other can be formed.

[0089] As a specific example, a topcoat paint in which the conversion products of the polymer of dimethylsiloxane and silica, polysiloxane and silica sol are dispersed in a dispersion solvent is cured from a mixed slurry including the polymer of dimethylsiloxane and silica, polysiloxane and silica sol. Among them, as a specific example, in the mixed slurry, based on 100 parts by weight, the weight of polymethylsiloxane is 25 parts - 30 parts, the weight of silica sol is 5 parts - 10 parts, the weight of the polymer of dimethylsiloxane and silica is 30 parts - 40 parts, and the balance is a dispersion solvent.

[0090] In some embodiments, the modified topcoat paint is a paint comprising a polymer of dimethylsiloxane and silica, a conversion product of the combination of polymethylsiloxane and silica sol. As an example, in the modified topcoat paint, the conversion product may include a bonding product of polymethylsiloxane and silica sol, a bonding product of both a polymer of dimethylsiloxane and silica and silica sol, a bonding product of both a polymer of dimethylsiloxane and silica and polymethylsiloxane, and a bonding product of polymethylsiloxane, silica sol and a polymer of dimethylsiloxane and silica. According to the present application, different combinations of bonding products can provide different properties and characteristics to the paint, enabling it to adapt to a wider range of application scenarios and more stringent usage requirements. As an example, the bonding product of polymethylsiloxane and silica sol can provide a certain degree of non-stickiness, making the cup with this modified ceramic coating have easy-to-clean performance. The bonding product of a polymer of dimethylsiloxane and silica and silica sol has abrasion resistance, making the cup with this modified ceramic coating have good stability and durability.

[0091] In these embodiments, after curing, the modified topcoat paint contains a certain amount of a polymer of dimethylsiloxane and silica, and a conversion product of polysiloxane and silica sol as the main film-forming substances. Here, the conversion product of a polymer of dimethylsiloxane and silica, polysiloxane and silica sol is specifically the product formed by the chemical combination of a polymer of dimethylsiloxane and silica, polysiloxane and silica sol with each other. When the modified topcoat paint is sprayed to form a modified ceramic coating, as the solvent and the like volatilize, the reaction products in the modified topcoat paint further crosslink to form a large number of crosslinked products including the conversion products of the combination of a polymer of dimethylsiloxane and silica, polysiloxane and silica sol as the topcoat layer of the container. The topcoat layer is dense and not prone to cracking, so it can serve as a protective layer for the primer layer and can inhibit the cracking of the primer layer, thereby making the container less likely to retain odors during use and further enhancing the consumer's usage experience.

[0092] In some embodiments, based on the total weight of the modified topcoat paint being 100%, the weight of the conversion product in the modified topcoat paint accounts for 60% - 80% of the total weight of the modified topcoat paint.

[0093] In these embodiments, the modified topcoat paint contains a conversion product with a weight ratio of 60% - 80%, and the balance is a dispersion solvent, which can ensure that the cup is non-sticky and further enhance the consumer's usage experience.

[0094] According to a third aspect of the present application, a modified ceramic coating is provided, which is at least used in cups. Among them, the modified ceramic coating includes a cross-linked product layer of a reaction product of modified polyetheretherketone, polysiloxane, and silica sol as a primer layer. Here, the cross-linked product layer of the reaction product of modified polyetheretherketone, polysiloxane, and silica sol is a cross-linked product layer formed by dehydration condensation during the sintering stage after spraying of a primer coating having a reaction product of modified polyetheretherketone, polysiloxane, and silica sol. Among them, the modified polyetheretherketone is at least one of hydroxylated polyetheretherketone and derivatives of hydroxylated polyetheretherketone.

[0095] According to the modified ceramic coating provided by the embodiments of the present application, a cross-linked product layer of a reaction product of modified polyetheretherketone, polysiloxane, and silica sol is used as a primer layer, which is dense and not prone to cracks during use, so it is not easy to combine with odor molecules. Therefore, it can largely avoid taste residue and improve the user experience of consumers.

[0096] In some embodiments, in the primer coating, a reaction product of modified polyetheretherketone, polysiloxane, and silica sol as the main film-forming substance forms a network structure. In the primer layer, the main film-forming substance of the network structure can form a dense primer layer, thereby further avoiding taste residue and improving the user experience of consumers.

[0097] According to the present application, the primer layer includes, in addition to the cross-linked product layer of the reaction product of modified polyetheretherketone, polysiloxane, and silica sol, a pigment and filler dispersed in the primer layer. As an example, based on the total weight of the primer layer being 100%, the weight of the cross-linked product layer of the reaction product of modified polyetheretherketone, polysiloxane, and silica sol accounts for 60% - 70% of the total weight of the primer layer, and the weight of the pigment and filler accounts for 30% - 40% of the total weight of the primer layer. In this way, while ensuring the density of the primer layer, the strength of the primer layer can be optimized, thereby suppressing primer cracks to further avoid taste residue and improving the user experience of consumers.

[0098] In some embodiments, the thickness of the primer layer is 10μm - 30μm, so that the lifespan of the primer layer can be ensured.

[0099] In some embodiments, the pigment and filler include a pigment and a filler. The pigment includes at least one of titanium dioxide, carbon black, copper chromite black, iron oxide, pigment brown, and pigment orange. The filler includes at least one of bentonite, kaolin, mica powder, montmorillonite, silicon carbide, alumina, and silica. In this way, while ensuring the density of the primer layer, the strength of the primer layer can be optimized, thereby suppressing primer cracks to further avoid taste residue, and the color of the primer layer can be ensured to improve the user experience of consumers.

[0100] In some embodiments, the weight ratio of the pigment to the filler is 1:2 - 2:1. When the pigment and the filler have a suitable weight ratio, it can balance the improvement of strength and color to a certain extent without overly affecting the compactness of the primer layer.

[0101] In some embodiments, the modified ceramic coating further includes a topcoat layer disposed on the primer layer. Specifically, it includes a topcoat layer covering the primer layer. The topcoat layer is a cross-linked product layer of the conversion product of polysiloxane and silica sol, that is, a layer formed by cross-linking the conversion product of polysiloxane and silica sol. Alternatively, the topcoat layer is a cross-linked product layer of the conversion product of the polymer of dimethylsiloxane and silicon dioxide, polysiloxane, and silica sol, that is, a layer formed by cross-linking the conversion product of the polymer of dimethylsiloxane and silicon dioxide, polysiloxane, and silica sol.

[0102] In these embodiments, the modified ceramic coating is a bilayer structure, which can further enhance the advantages of the primer-modified polyetheretherketone. When there is no modified polyetheretherketone in the primer, gaps appear in the thermally expanded primer, and cracks may also occur in the relatively thin topcoat, which cannot block the gaps. However, when the primer contains modified polyetheretherketone, the influence of high-temperature thermal expansion on the coating cracks is not obvious, and a small amount of gaps that appear in the primer are further sealed after applying the topcoat.

[0103] In some embodiments, the thickness of the topcoat layer is 1μm - 5μm. In this way, the lifespan of the topcoat layer can be ensured.

[0104] According to the fourth aspect of the present application, a method for preparing a modified ceramic coating is provided. The method for preparing the modified ceramic coating includes the following steps: forming a mixed slurry including modified polyetheretherketone, polysiloxane, and silica sol, where the modified polyetheretherketone is at least one of hydroxylated polyetheretherketone and derivatives of hydroxylated polyetheretherketone; ripening the mixed slurry to obtain a liquid coating in which the reaction products of modified polyetheretherketone, polysiloxane, and silica sol are dispersed in a solvent as the primer coating; spraying the primer coating and sintering it so that the reaction products crosslink and cure to form a primer layer as the modified ceramic coating.

[0105] According to the present application, the primer coating is sprayed to form a primer layer. Among them, air spraying can be used for spraying. As an example, the parameters of air spraying include: spraying distance is 140mm - 180mm; air pressure is 0.2MPa - 0.4MPa; flow rate is 5L / min - 10L / min; the moving speed of the spray gun is 30cm / second - 60cm / second; the angle between the nozzle and the object to be sprayed is 80° - 100°; the moving speed of the spray gun is 30cm / second - 60cm / second; the spray gun orifice diameter is 1.4mm - 1.6mm. Since the primer coating is a liquid coating, it can be evenly distributed on the surface of the container body and is easy to apply.

[0106] According to the present application, a topcoat is sprayed on the primer layer to form a topcoat layer. Among them, air spraying can be used for spraying. As an example, the parameters of air spraying include: the spraying distance is 140 mm - 180 mm; the air pressure is 0.2 MPa - 0.4 MPa; the flow rate is 5 L / min - 10 L / min; the moving speed of the spray gun is 30 cm / s - 60 cm / s; the angle between the nozzle and the object to be sprayed is 80° - 100°; the moving speed of the spray gun is 30 cm / s - 60 cm / s; the nozzle diameter of the spray gun is 1.4 mm - 1.6 mm. Since the topcoat is a liquid coating, it can be evenly distributed on the surface of the primer layer and is easy to apply.

[0107] According to the present application, after spraying, it further includes the step of curing the modified ceramic coating sprayed by air. As an example, the coating can be cured by sintering. Specifically, the sintering temperature is 200°C - 300°C, and the sintering time is 8 - 15 minutes to improve the overall quality of the modified ceramic coating.

[0108] Under the influence of the sintering temperature, the solvent in the modified ceramic coating sprayed by air volatilizes. In the case of the reduction of the solvent, most of the polyether ether ketone, polymethylsiloxane, and silica sol in the modified ceramic coating crosslink with each other at this stage to form a crosslinked product including the reaction products of the three as the modified ceramic coating of the primer layer. In this way, the anti-odor performance of the cup with the modified ceramic coating can be further optimized.

[0109] According to the fifth aspect of the present application, a method for manufacturing a container is provided. Among them, the method for manufacturing a container includes forming a mixed slurry including modified polyether ether ketone, polysiloxane, and silica sol, where the modified polyether ether ketone is at least one of hydroxylated polyether ether ketone and derivatives of hydroxylated polyether ether ketone; ripening the mixed slurry to obtain a liquid coating formed by dispersing the reaction products of modified polyether ether ketone, polysiloxane, and silica sol in a solvent as the primer coating; spraying the primer coating on the container body and sintering to crosslink and cure the reaction products of modified polyether ether ketone, polysiloxane, and silica sol to form a crosslinked product layer including the reaction products of modified polyether ether ketone, polysiloxane, and silica sol on the container body as the primer layer, thereby manufacturing the container.

[0110] According to the present application, a primer coating is sprayed on the container body to form a primer layer. Among them, air spraying can be used for spraying. As an example, the parameters of air spraying include: the spraying distance is 140 mm - 180 mm; the air pressure is 0.2 MPa - 0.4 MPa; the flow rate is 5 L / min - 10 L / min; the moving speed of the spray gun is 30 cm / second - 60 cm / second; the angle between the nozzle and the object to be sprayed is 80° - 100°; the moving speed of the spray gun is 30 cm / second - 60 cm / second; the nozzle diameter of the spray gun is 1.4 mm - 1.6 mm. Since the primer coating is a liquid coating, it can be evenly distributed on the surface of the container body and is easy to apply.

[0111] According to the present application, a topcoat is sprayed on the primer layer to form a topcoat layer. Among them, air spraying can be used for spraying. As an example, the parameters of air spraying include: the spraying distance is 140 mm - 180 mm; the air pressure is 0.2 MPa - 0.4 MPa; the flow rate is 5 L / min - 10 L / min; the moving speed of the spray gun is 30 cm / second - 60 cm / second; the angle between the nozzle and the object to be sprayed is 80° - 100°; the moving speed of the spray gun is 30 cm / second - 60 cm / second; the nozzle diameter of the spray gun is 1.4 mm - 1.6 mm. Since the topcoat is a liquid coating, it can be evenly distributed on the surface of the primer layer and is easy to apply.

[0112] According to the present application, after spraying, it further includes a step of curing the modified ceramic coating sprayed by air. As an example, the coating can be cured by sintering. Specifically, the sintering temperature is 200°C - 300°C, and the sintering time is 8 - 15 minutes to improve the overall quality of the modified ceramic coating.

[0113] Under the influence of the sintering temperature, the solvent in the modified ceramic coating sprayed by air volatilizes. In the case of the reduction of the solvent, most of the polyether ether ketone, polymethylsiloxane, and silica sol in the modified ceramic coating crosslink with each other at this stage to form a crosslinked product including the reaction products of the three as the modified ceramic coating of the primer layer. In this way, the anti-odor performance of the cup with the modified ceramic coating can be further optimized.

[0114] According to the sixth aspect of the present application, a container is provided. Among them, the container includes a container body and a modified ceramic coating formed on the inner wall surface of the container body. Among them, the modified ceramic coating is the modified ceramic coating according to the above; or, the modified ceramic coating is a layer formed by a modified ceramic coating, where the modified ceramic coating is the modified ceramic coating according to the above or a ceramic coating formed by the method for preparing the modified ceramic coating according to the above.

[0115] In some embodiments, the container is a container with an anti-odor requirement, specifically, it can be the inner liner of a cup, a cooking pot, or a kettle. Here, the cooking pot includes the inner liner of a frying pan, a wok, or a casserole.

[0116] Taking a cup as an example, the cup includes a cup body, and a modified ceramic coating is formed on the inner sidewall of the cup body. Here, the cup body can be a stainless-steel body, specifically 304 stainless steel or 316 stainless steel.

[0117] Hereinafter, the beneficial effects of the inventive concept will be described in conjunction with specific examples.

[0118] Example 1

[0119] The following is the method for forming the base oil coating.

[0120] S10: Form a mixed slurry including modified polyether ether ketone, polydimethylsiloxane, silica sol, and isopropyl alcohol (solvent). In the mixed slurry, by weight, the weight of modified polyether ether ketone is 0.3 parts, the weight of polydimethylsiloxane is 35 parts, the weight of silica sol is 13 parts, and the weight of isopropyl alcohol is 20 parts.

[0121] Stir and mix the mixed slurry at a temperature of 25°C for 10 h, and maintain the system pH value at 3 - 6 to obtain the cured coating, thereby forming the base oil coating.

[0122] The following is the method for manufacturing an anti-odor cup using the above base oil coating.

[0123] S20: Provide a cup body.

[0124] S30: Preheat. Clean the cup body and preheat it to 60°C.

[0125] S40: Spray. Use the base oil coating to form a base oil layer with a thickness of 20 microns on the inner surface of the cup body by air spraying as the modified ceramic coating of the cup. Among them, the spray gun orifice diameter is 1.0 mm, and the air spraying parameters are as follows: the spraying distance is 160 mm; the air pressure is 0.3 MPa, the flow rate is 7 L / min; the moving speed of the spray gun is 40 cm / s; the angle between the nozzle and the object to be sprayed is 90°.

[0126] S50: Sinter. Cure at a temperature of 280°C for 10 minutes.

[0127] Through the above method, the anti-odor cup of Example 1 is obtained.

[0128] Example 2

[0129] Except for forming the bottom oil coating with raw materials in different parts by weight in step S10 (wherein, by parts by weight, the modified polyether ether ketone is 0.1 part, the polydimethylsiloxane is 35 parts, the silica sol is 13 parts, and the isopropanol is 20 parts), the odor-proof cup of Example 2 is manufactured by the same method as in Example 1.

[0130] Example 3

[0131] Except for forming the bottom oil coating with raw materials in different parts by weight in step S10 (wherein, by parts by weight, the modified polyether ether ketone is 0.5 part, the polydimethylsiloxane is 35 parts, the silica sol is 13 parts, and the isopropanol is 20 parts), the odor-proof cup of Example 3 is manufactured by the same method as in Example 1.

[0132] Example 4

[0133] Except for forming the bottom oil coating with raw materials in different parts by weight in step S10 (wherein, by parts by weight, the modified polyether ether ketone is 0.3 part, the polydimethylsiloxane is 30 parts, the silica sol is 13 parts, and the isopropanol is 20 parts), the odor-proof cup of Example 4 is manufactured by the same method as in Example 1.

[0134] Example 5

[0135] Except for forming the bottom oil coating with raw materials in different parts by weight in step S10 (wherein, by parts by weight, the modified polyether ether ketone is 0.3 part, the polydimethylsiloxane is 40 parts, the silica sol is 13 parts, and the isopropanol is 20 parts), the odor-proof cup of Example 5 is manufactured by the same method as in Example 1.

[0136] Example 6

[0137] Except for forming the bottom oil coating with raw materials in different parts by weight in step S10 (wherein, by parts by weight, the modified polyether ether ketone is 0.3 part, the polydimethylsiloxane is 35 parts, the silica sol is 10 parts, and the isopropanol is 20 parts), the odor-proof cup of Example 6 is manufactured by the same method as in Example 1.

[0138] Example 7

[0139] Except for forming the bottom oil coating with raw materials in different parts by weight in step S10 (wherein, by parts by weight, the modified polyetheretherketone is 0.3 parts, the polymethylsiloxane is 35 parts, the silica sol is 15 parts, and the isopropanol is 20 parts), the anti-odor cup of Example 7 is manufactured by the same method as in Example 1.

[0140] Example 8

[0141] Except for forming the bottom oil coating with raw materials in different parts by weight in step S10 (wherein, by parts by weight, the modified polyetheretherketone is 0.3 parts, the polymethylphenylsiloxane is 35 parts, the silica sol is 13 parts, and the isopropanol is 20 parts), the anti-odor cup of Example 8 is manufactured by the same method as in Example 1.

[0142] Example 9 (the following is the example corresponding to the primer including filler and titanium dioxide)

[0143] Except for forming the bottom oil coating with raw materials in different parts by weight in step S10 (wherein, by parts by weight, the modified polyetheretherketone is 0.3 parts, the polymethylsiloxane is 35 parts, the silica sol is 13 parts, the titanium dioxide is 13 parts, the bentonite is 13 parts, and the isopropanol is 20 parts), the anti-odor cup of Example 9 is manufactured by the same method as in Example 1.

[0144] Example 10

[0145] Except for forming the bottom oil coating with raw materials in different parts by weight in step S10 (wherein, by parts by weight, the modified polyetheretherketone is 0.1 parts, the polymethylsiloxane is 35 parts, the silica sol is 13 parts, the titanium dioxide is 13 parts, the bentonite is 13 parts, and the isopropanol is 20 parts), the anti-odor cup of Example 10 is manufactured by the same method as in Example 1.

[0146] Example 11

[0147] Except for forming the bottom oil coating with raw materials in different parts by weight in step S10 (wherein, by parts by weight, the modified polyetheretherketone is 0.5 parts, the polymethylsiloxane is 35 parts, the silica sol is 13 parts, the titanium dioxide is 13 parts, the bentonite is 13 parts, and the isopropanol is 20 parts), the anti-odor cup of Example 11 is manufactured by the same method as in Example 1.

[0148] Example 12

[0149] Except for forming the bottom oil coating with raw materials in different parts by weight in step S10 (wherein, by parts by weight, the modified polyether ether ketone is 0.3 part, the polydimethylsiloxane is 30 parts, the silica sol is 13 parts, the titanium dioxide is 13 parts, the bentonite is 13 parts, and the isopropanol is 20 parts), the odor-proof cup of Example 12 is manufactured by the same method as in Example 1.

[0150] Example 13

[0151] Except for forming the bottom oil coating with raw materials in different parts by weight in step S10 (wherein, by parts by weight, the modified polyether ether ketone is 0.3 part, the polydimethylsiloxane is 40 parts, the silica sol is 13 parts, the titanium dioxide is 13 parts, the bentonite is 13 parts, and the isopropanol is 20 parts), the odor-proof cup of Example 13 is manufactured by the same method as in Example 1.

[0152] Example 14

[0153] Except for forming the bottom oil coating with raw materials in different parts by weight in step S10 (wherein, by parts by weight, the modified polyether ether ketone is 0.3 part, the polydimethylsiloxane is 35 parts, the silica sol is 10 parts, the titanium dioxide is 13 parts, the bentonite is 13 parts, and the isopropanol is 20 parts), the odor-proof cup of Example 14 is manufactured by the same method as in Example 1.

[0154] Example 15

[0155] Except for forming the bottom oil coating with raw materials in different parts by weight in step S10 (wherein, by parts by weight, the modified polyether ether ketone is 0.3 part, the polydimethylsiloxane is 35 parts, the silica sol is 15 parts, the titanium dioxide is 13 parts, the bentonite is 13 parts, and the isopropanol is 20 parts), the odor-proof cup of Example 15 is manufactured by the same method as in Example 1.

[0156] Example 16

[0157] Except for forming the base oil coating with raw materials in different parts by weight in step S10 (wherein, by parts by weight, the weight of the modified polyether ether ketone is 0.3 part, the weight of the polymethylphenylsiloxane is 35 parts, the weight of the silica sol is 13 parts, the weight of the titanium dioxide is 13 parts, the weight of the bentonite is 13 parts, and the weight of the isopropanol is 20 parts), the odor-proof cup of Example 16 is manufactured by the same method as in Example 1.

[0158] Example 17 (the following is the example of adding a topcoat layer to Example 1)

[0159] Except for forming a topcoat layer with a thickness of 3 microns on the base oil layer of Example 1 by using a topcoat (the topcoat includes dispersed isopropanol and the conversion product of polysiloxane and silica sol dispersed in isopropanol, and taking the total weight of the topcoat as 100%, the weight of the conversion product of polysiloxane and silica sol accounts for 70% of the total weight of the topcoat, and the balance is isopropanol) between step S40 and step S50 of Example 1, the odor-proof cup of Example 17 is manufactured by the same method as in Example 1.

[0160] Example 18

[0161] Except for forming a topcoat layer with a thickness of 3 microns on the base oil layer of Example 1 by using a topcoat (the topcoat includes isopropanol and the polymer of dimethylsiloxane and silicon dioxide, and the conversion product of polysiloxane and silica sol dispersed in isopropanol, and taking the total weight of the topcoat as 100%, the weight of the polymer of dimethylsiloxane and silicon dioxide, and the conversion product of polysiloxane and silica sol accounts for 70% of the total weight of the topcoat, and the balance is isopropanol) between step S40 and step S50 of Example 1, the odor-proof cup of Example 18 is manufactured by the same method as in Example 1.

[0162] Example 19 (the following is the example of adding a topcoat layer to Example 9)

[0163] Except for forming a topcoat layer with a thickness of 3 microns on the base oil layer of Example 9 by using a topcoat (the topcoat includes isopropanol and the conversion product of polysiloxane and silica sol dispersed in isopropanol, and taking the total weight of the topcoat as 100%, the weight of the conversion product of polysiloxane and silica sol accounts for 70% of the total weight of the topcoat, and the balance is isopropanol) between step S40 and step S50 of Example 9, the odor-proof cup of Example 19 is manufactured by the same method as in Example 9.

[0164] Example 20

[0165] Except that between step S40 and step S40 of Example 9, a topcoat (the topcoat includes isopropyl alcohol and a polymer of dimethylsiloxane and silica, a conversion product of polysiloxane and silica sol dispersed in isopropyl alcohol. Based on the total weight of the topcoat being 100%, the weight of the polymer of dimethylsiloxane and silica, the conversion product of polysiloxane and silica sol accounts for 70% of the total weight of the topcoat, and the balance is isopropyl alcohol) is used to form a topcoat layer with a thickness of 3 microns on the primer layer of Example 9, the anti-odor cup of Example 20 is manufactured by the same method as Example 9.

[0166] Comparative Example 1

[0167] Except that in step S10, a different primer coating is used instead of the primer coating of Example 1 (wherein, the primer coating of Comparative Example 1 is a primer coating after curing of polymethylsiloxane, silica sol and isopropyl alcohol. In the primer coating, the weight part of polymethylsiloxane is 35 parts, the weight part of silica sol is 13 parts, and the weight part of isopropyl alcohol is 20 parts), the anti-odor cup of Comparative Example 1 is manufactured by the same method as Example 1.

[0168] Comparative Example 2

[0169] Except that in step S10, a different primer coating is used instead of the primer coating of Example 9 (wherein, the primer coating of Comparative Example 2 is a primer coating after curing of polymethylsiloxane, silica sol, titanium dioxide, bentonite and isopropyl alcohol. In the primer coating, the weight part of polymethylsiloxane is 35 parts, the weight part of silica sol is 13 parts, the weight part of titanium dioxide is 13 parts, the weight part of bentonite is 13 parts, and the weight part of isopropyl alcohol is 20 parts), the anti-odor cup of Comparative Example 2 is manufactured by the same method as Example 9.

[0170] Comparative Example 3

[0171] Except that in step S10, a different primer coating is used instead of the primer coating of Example 1 (wherein, the primer coating of Comparative Example 3 is a primer coating after curing of polymethylphenylsiloxane, silica sol and isopropyl alcohol. In the primer coating, the weight part of polymethylphenylsiloxane is 35 parts, the weight part of silica sol is 13 parts, and the weight part of isopropyl alcohol is 20 parts), the anti-odor cup of Comparative Example 3 is manufactured by the same method as Example 1.

[0172] Comparative Example 4

[0173] Except that different primer paints are used in step S10 instead of the primer paint in Example 9 (wherein, the primer paint of Comparative Example 2 is the primer paint after curing polymethylphenylsiloxane, silica sol, titanium dioxide, bentonite and isopropyl alcohol. In the primer paint, the weight portion of polymethylphenylsiloxane is 35 portions, the weight portion of silica sol is 13 portions, the weight portion of titanium dioxide is 13 portions, the weight portion of bentonite is 13 portions, and the weight portion of isopropyl alcohol is 20 portions), the odor-proof cupware of Comparative Example 4 is manufactured by the same method as in Example 9.

[0174] The non-stick properties of the odor-proof cupware of the above Examples 1-20 and Comparative Examples 1-4 are tested, and the test results are shown in Table 1 below.

[0175] The test methods for performance indicators are as follows:

[0176] (1) Odor test method:

[0177] 1. Brew coffee (15 g of coffee + 150 ml of water), pour out the coffee for standby at intervals of a soaking time, clean and smell the odor, and then continue to soak.

[0178] 2. Evaluation: Grade A (no odor); Grade B (slight odor, acceptable); Grade C (obvious odor, unacceptable);

[0179] 3. Test the odor every 1 h, record the duration when the cupware reaches Grade C during use. The longer the duration, the better the odor-proof effect of the tested odor-proof cupware.

[0180] (2) Easy-to-clean test method:

[0181] 1. Place the cupware in the dishwasher and wash it continuously 5 times (each time for 1.5 h).

[0182] 2. Spread tomato ketchup evenly on the bottom of the cup and place it for 2 h.

[0183] 3. Rinse with tap water and observe whether there are stains and discolorations that are difficult to clean.

[0184] 4. Evaluation method: Grade A (no stains and discolorations that are difficult to clean after rinsing); Grade B (there are stains that are difficult to clean, but no discoloration); Grade C (there is discoloration residue).

[0185] 5. The above is one cycle, record the number of cycles to reach Grade C. The larger the number of cycles, the better the easy cleanability of the tested odor-proof cupware.

[0186] (3) Impact resistance test method: Use a 50 g steel ball to freely fall from a certain height and hit the bottom of the water cup coated with a ceramic coating, and record the height at which chipping occurs. The higher the height, the higher the coating strength of the tested odor-proof cupware.

[0187] Table 1 Test Result Record Table

[0188]

[0189]

[0190] By comparing and analyzing Examples 1 - 20 of the inventive concept with Comparative Examples 1 - 4, it can be seen that: compared with the cups with ceramic coatings formed by conventional ceramic coatings, the cups formed by the modified ceramic coating including modified polyetheretherketone, polymethylsiloxane and silica sol according to the present application can have no peculiar smell after being used for a long time, are easy to clean, and the user experience is good. In addition, the cups formed by the modified ceramic coating have good impact resistance and a high bonding strength with the cup body, so that the overall strength of the cups is better.

[0191] Although the embodiments of the present application have been described in detail above, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the present application. However, it should be understood that in the view of those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present application defined by the claims.

Claims

1. A modified ceramic coating, characterized in that: The modified ceramic coating comprises a primer layer, which comprises a cross-linked product layer of a reaction product of modified polyetheretherketone, polysiloxane and silica sol, wherein the modified polyetheretherketone is hydroxylated polyetheretherketone or a derivative of hydroxylated polyetheretherketone.

2. The modified ceramic coating according to claim 1, characterized in that: Pigments and fillers are also dispersed in the crosslinked product layer of the reaction product of the modified polyetheretherketone, polysiloxane and silica sol.

3. The modified ceramic coating according to claim 2, characterized in that: Taking the total weight of the base oil layer as 100%, the weight of the cross-linked product layer of the reaction product of modified polyetheretherketone, polysiloxane and silica sol accounts for 60% to 70% of the total weight of the base oil layer, and the weight of the pigment and filler accounts for 30% to 40% of the total weight of the base oil layer.

4. The modified ceramic coating according to claim 2, characterized in that: The color filler includes pigments and fillers, the pigment includes at least one of titanium dioxide, carbon black, copper chrome black, iron oxide, pigment brown and pigment orange, and the filler includes at least one of bentonite, kaolin, mica powder, montmorillonite, silicon carbide, aluminum oxide and silicon dioxide.

5. The modified ceramic coating according to claim 1, characterized in that: The polysiloxane includes at least one of polymethylsiloxane, polymethylphenylsiloxane and polyethylsiloxane; and / or the thickness of the base oil layer is 10 μm-30 μm.

6. The modified ceramic coating according to claim 1, characterized in that: The modified ceramic coating also includes a surface oil layer formed on the base oil layer; wherein the surface oil layer is a cross-linked product layer of a conversion product of polysiloxane and silica sol, or the surface oil layer is a cross-linked product layer of a conversion product of a polymer of dimethylsiloxane and silicon dioxide, polysiloxane and silica sol.

7. A method for preparing a modified ceramic coating, characterized in that: The preparation method of the modified ceramic coating comprises the following steps: forming a mixed slurry comprising modified polyetheretherketone, polysiloxane and silica sol, wherein the modified polyetheretherketone is at least one of hydroxylated polyetheretherketone and a derivative of hydroxylated polyetheretherketone; The mixed slurry is aged to obtain a liquid coating formed by dispersing a reaction product of modified polyetheretherketone, polysiloxane and silica sol in a solvent as a base oil coating; The primer coating is sprayed and sintered to allow the reaction product to be cross-linked and cured to form a primer layer as a modified ceramic coating.

8. The method for preparing the modified ceramic coating according to claim 7, characterized in that: In the mixed slurry, the weight ratio of the modified polyetheretherketone, the polysiloxane and the silica sol is (0.1-0.5):(30-40):(10-15).

9. The method for preparing the modified ceramic coating according to claim 7, characterized in that: The forming step comprises a mixed slurry of modified polyetheretherketone, polysiloxane and silica sol, comprising: The modified polyetheretherketone and silica sol are mixed, and the pH value is adjusted to 3-6, and then the polysiloxane is added to form a mixed slurry including polyetheretherketone, polysiloxane and silica sol.

10. The method for preparing a modified ceramic coating according to claim 7, characterized in that: The step of ripening the mixed slurry comprises: stirring the mixed slurry for 4 hours to 10 hours at a temperature of 15° C. to 25° C. and maintaining a pH value of 3 to 6 to ripen the mixed slurry.

11. The method for preparing a modified ceramic coating according to claim 7 or 8, characterized in that: In the mixed slurry, the weight portion of the modified polyetheretherketone is 0.2-1.0 parts, the weight portion of the polysiloxane is 30-40 parts, the weight portion of the silica sol is 10-15 parts, and the weight portion of the solvent is 10-30 parts; or, The mixed slurry also includes pigments and fillers and solvents, wherein in the mixed slurry, the weight portion of the modified polyetheretherketone is 0.1 parts to 0.5 parts, the weight portion of the polysiloxane is 30 parts to 40 parts, the weight portion of the silica sol is 10 parts to 15 parts, the weight portion of the pigments and fillers is 20 parts to 30 parts, and the weight portion of the solvent is 10 parts to 30 parts.

12. A container, characterized in that: The container includes a container body and a modified ceramic coating formed on the inner wall surface of the container body, wherein the modified ceramic coating is a modified ceramic coating according to any one of claims 1 to 6, or a modified ceramic coating prepared by the preparation method of the modified ceramic coating according to any one of claims 7 to 11.

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