CN115820112B - Coating composition and preparation method and application thereof - Google Patents
Coating composition and preparation method and application thereof Download PDFInfo
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- CN115820112B CN115820112B CN202211530898.4A CN202211530898A CN115820112B CN 115820112 B CN115820112 B CN 115820112B CN 202211530898 A CN202211530898 A CN 202211530898A CN 115820112 B CN115820112 B CN 115820112B
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Abstract
The invention provides a coating composition, a preparation method and application thereof. The coating composition according to the present invention comprises a primer coating, a top coating a and a top coating B, wherein the primer coating comprises an inorganic acid ester, a silicone resin and a primer catalyst, the top coating a comprises inorganic nano particles, a silicone precursor a and a catalyst a, and the top coating B comprises a silicone precursor B, a silane coupling agent and a catalyst B. The coating formed after the coating is cured can make up the defect of the Teflon coating, break through the use limit of the commercial Teflon coating at 260 ℃ and meet the requirements of consumers on healthy coatings. The invention also provides a preparation method of the coating composition, a non-stick coating and application.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a coating composition, a preparation method and application thereof.
Background
The non-stick coating is often used for kitchen ware such as woks, electric rice cookers, air fryers and the like, and is healthier and popular because of less oil consumption. In the related art, the non-stick coating mainly comprises fluororesin and ceramic as main components. The fluororesin coating is used as an organic matter coating, has excellent non-tackiness due to the characteristic of low surface energy, but has the defects of low hardness, poor wear resistance and hidden health hazards caused by miseating by people. The common fluorine resin coating is a Teflon coating, namely a polytetrafluoroethylene coating, is an inert material, has good lubricity and low friction coefficient, has a Teflon melting point of 327 ℃, can resist high temperature of 300 ℃ in a short time, has a decomposition temperature of 350 ℃, can decompose to generate fluorophosgene as a toxic substance when the temperature is more than 350 ℃, and can strongly stimulate the lung, so that the use temperature is controlled within 260 ℃. In addition, the fluorine coating has low adhesion to the substrate, and there is a risk of peeling. The ceramic coating greatly overcomes the defects of the fluorine coating, has high hardness, good adhesiveness and difficult peeling, but has lower non-tackiness than the fluorine resin, and the non-tackiness in a short period of time can be obviously reduced.
In summary, there is still a need to develop a coating that can form a high temperature resistant non-stick coating after curing, make up for the defect of teflon coating, break through the use restriction of 260 ℃ of commercially available teflon coating, and meet the needs of consumers for healthy coatings.
Disclosure of Invention
The present invention aims to solve at least one of the above technical problems in the prior art. Therefore, the invention provides a coating composition, which can make up the defect of a Teflon coating after being cured, break through the use limit of the commercially available Teflon coating at 260 ℃ and meet the requirements of consumers on healthy coatings.
The invention also provides a method of preparing the coating composition.
The invention also provides a non-stick coating.
The invention also provides cooking equipment.
The first aspect of the present invention provides a coating composition comprising a primer coating, a top coating a and a top coating B, the primer coating comprising an inorganic acid ester, a silicone resin and a primer catalyst, the top coating a comprising inorganic nanoparticles, a silicone precursor a and a catalyst a, the top coating B comprising a silicone precursor B, a silane coupling agent and a catalyst B.
The invention relates to one of the technical schemes of a coating composition, which has at least the following beneficial effects:
In the primer coating composition, the inorganic acid ester has the function of forming a binder through hydrolytic condensation under the action of a catalyst, and the generated hydroxyl can form a hydrogen bond with the hydroxyl in the top coating to increase the binding force of the primer coating and the top coating. The silicone resin serves to increase the adhesion of the primer coating to the substrate. The undercoating catalyst serves to catalyze the hydrolysis of the inorganic acid ester.
In the top coating a, the function of the inorganic nanoparticles is to increase the surface roughness, increase the contact angle of the coating, and increase the hydrophobicity of the coating. The organosilicon precursor A has the function of hydrolytic condensation, and is used for modifying the low surface energy of inorganic nano particles to promote the superhydrophobicity of the system. The catalyst A is used for catalyzing the hydrolytic condensation reaction of the organosilicon precursor A.
In the top coating B, the organosilicon precursor B has self hydrolytic condensation reaction under the action of the catalyst B, and the organosilicon precursor B has condensation reaction with the hydrolyzed silane coupling agent, so that the hydrolytic condensation can ensure the hydrophobicity of the system, and can also have adhesive effect on inorganic nano particles in the top coating A, thereby increasing the compactness of the coating. The silane coupling agent has the function of further crosslinking with the hydrolyzed organosilicon precursor B, and the synergistic effect of the silane coupling agent and the organosilicon precursor B improves the cohesiveness of the top-coating B. The catalyst B is used for catalyzing the dehydration condensation reaction of the organosilicon precursor B and the silane coupling agent.
In order to improve the high temperature resistance of the non-stick coating, most manufacturers add inorganic compounds into the fluorine coating, however, the problem of miscibility of the inorganic compounds and the fluorine coating is difficult to solve. The new primer coating is developed by manufacturers, or a metal net structure layer is added on the surface of the fluorine coating, but after the fluorine coating is heated for many times, the peeling phenomenon can occur between the coating and the primer coating or the metal net, and the metal net lacks non-tackiness, so that the product quality can be influenced. Thus, it is difficult for the prior art to break through the upper temperature use limit of the non-stick coating. According to the invention, through an organic-inorganic hybridization technology and a double-layer structure of the bottom coating and the top coating, the adhesion is ensured, the temperature resistance and the non-tackiness of the coating are improved, and finally, the coating prepared from the coating composition has superhydrophobicity and more outstanding high temperature resistance, adhesion, wear resistance and non-tackiness. The organic-inorganic hybridization technology refers to hybridization of inorganic nanoparticles and other components after the reaction, wherein the other components contain inorganic elements Si and O and organic elements C.
According to some embodiments of the invention, the mass ratio of the top coating material A to the top coating material B is 1-3:1.
According to some embodiments of the invention, the mass ratio of the top coating material A to the top coating material B is 2-3:1.
According to some embodiments of the invention, the mass ratio of top coating a to top coating B is 2:1.
According to some embodiments of the invention, the primer coating comprises, in parts by mass:
inorganic acid ester: 15 to 60 parts of the components in parts by weight,
silicone resin: 1 to 40 parts of the components in parts by weight,
priming catalyst: 1 to 5 parts.
According to some embodiments of the invention, the primer coating comprises, in parts by mass:
inorganic acid ester: 20 to 50 parts of the components in parts by weight,
silicone resin: 1 to 30 parts of the components in parts by weight,
priming catalyst: 1 to 3 parts.
According to some embodiments of the invention, the basecoat coating further comprises an alcohol, water, and a film-forming aid.
According to some embodiments of the invention, in the primer coating, the primer coating comprises, based on total parts by mass of the primer coating:
alcohol: 15 to 50 parts of the components,
water: 3 to 40 parts of the components in parts by weight,
film forming auxiliary agent: 0.1 to 2 parts.
Wherein the alcohol acts as a solvent.
The film-forming auxiliary agent has the function of improving the wettability and film-forming property of the base coat.
According to some embodiments of the invention, in the primer coating, the primer coating comprises, based on total parts by mass of the primer coating:
Alcohol: 15 to 45 parts of the components,
water: 3 to 33 parts of the components,
film forming auxiliary agent: 0.1 to 1 part.
According to some embodiments of the invention, the inorganic acid ester is selected from at least one of ethyl orthosilicate, tetrabutyl titanate, tributyl phosphate, and methyl bisulfate.
According to some embodiments of the invention, the silicone resin is selected from at least one of methyl silicone resin, epoxy modified silicone resin, vinyl silicone resin, hydroxyl silicone resin, and phenyl silicone resin.
According to some embodiments of the invention, the priming catalyst is selected from at least one of sodium dihydrogen phosphate, hydrochloric acid, sodium hydroxide, sodium thiosulfate, formic acid, ammonia, sodium phosphate and acetic acid.
According to some embodiments of the invention, the alcohol comprises at least one of methanol, ethanol, isopropanol, benzyl alcohol, ethylene glycol.
According to some embodiments of the invention, the film forming aid comprises a dodecanol ester.
According to some embodiments of the invention, the topcoat a includes, in parts by mass:
inorganic nanoparticles: 1 to 25 parts of the components,
organosilicon precursor a:5 to 35 parts of the components,
catalyst A:0.01 to 2 parts.
According to some embodiments of the invention, the topcoat a includes, in parts by mass:
Inorganic nanoparticles: 1 to 20 parts of the components in parts by weight,
organosilicon precursor a:5 to 30 parts of the components,
catalyst A:0.01 to 1 part.
According to some embodiments of the invention, the topcoat a further comprises an alcohol and water.
According to some embodiments of the invention, the top coating a further comprises, based on the total parts by mass of the top coating a:
alcohol: 8 to 80 parts of the components in parts by weight,
water: 4-80 parts.
According to some embodiments of the invention, the top coating a further comprises, based on the total parts by mass of the top coating a:
alcohol: 8 to 70 parts of the components,
water: 4-65 parts.
According to some embodiments of the invention, the inorganic nanoparticle is selected from at least one of cerium oxide nanoparticle, magnesium oxide nanoparticle, titanium oxide nanoparticle, silicon oxide nanoparticle, and zirconium oxide nanoparticle.
According to some embodiments of the invention, the inorganic nanoparticles have a particle size in the range of 10nm to 200nm.
According to some embodiments of the invention, the topcoat material B includes, in parts by mass:
organosilicon precursor B:1 to 25 parts of the components,
silane coupling agent: 5 to 50 parts of the components,
catalyst B:0.01 to 2 parts.
According to some embodiments of the invention, the topcoat material B includes, in parts by mass:
Organosilicon precursor B:1 to 20 parts of the components in parts by weight,
silane coupling agent: 5 to 40 parts of the components,
catalyst B:0.01 to 1 part.
According to some embodiments of the invention, the topcoat material B further comprises an alcohol and water.
According to some embodiments of the invention, the topcoat B further comprises, in total parts by mass of the topcoat B:
alcohol: 5 to 80 parts of the components in parts by weight,
water: 1 to 50 parts.
According to some embodiments of the invention, the topcoat B further comprises, in total parts by mass of the topcoat B:
alcohol: 5 to 70 parts of the components,
water: 1 to 40 parts.
According to some embodiments of the invention, the organosilicon precursor a and the organosilicon precursor B are different and are each independently selected from at least one of methyltrimethoxysilane, methyltriethoxysilane, dimethyldimethoxysilane, methylphenyldimethoxysilane, dodecyltriethoxysilane, hexadecyltrimethoxysilane, hexamethyldisilazane, and heptamethyltrisiloxane.
According to some embodiments of the invention, the silane coupling agent comprises at least one or several of trifluoropropyl trimethoxysilane, KH550, KH560, KH570, KH792, KH590, GR-300, KR-12 and Z-6172.
According to some embodiments of the invention, the catalyst a and the catalyst B are different and are each independently selected from at least one of sodium dihydrogen phosphate, hydrochloric acid, sodium hydroxide, sodium thiosulfate, formic acid, ammonia water, sodium phosphate and acetic acid.
According to some embodiments of the invention, the mass ratio of top coat a, top coat B and alcohol is 1-3:1:7.
According to some embodiments of the invention, the mass ratio of top coat a, top coat B and alcohol is 2:1:7.
In a second aspect, the present invention provides a method of preparing the coating composition, the method comprising: and respectively mixing the preparation raw materials of the base coating, the top coating A and the top coating B to obtain the base coating, the top coating A and the top coating B.
The invention relates to a technical scheme in a preparation method of a coating composition, which has at least the following beneficial effects:
according to the method for preparing the coating composition, the preparation raw materials of the base coating, the top coating A and the top coating B are mixed respectively, so that the base coating, the top coating A and the top coating B can be obtained, the preparation method is simple, complex process control and harsh process conditions are not needed, expensive equipment is not needed, and the process production is easy.
According to some embodiments of the invention, the method of preparing the primer coating comprises: reacting inorganic acid ester, alcohol, water and a primer catalyst for 10-24 hours at 40-80 ℃, adding organic silicon resin and a film-forming auxiliary agent after the reaction is finished, and continuing the reaction for 2-10 hours to obtain the primer coating. The primer coating has higher adhesive force, and can ensure that the coating is not separated from the substrate when being heated.
According to some embodiments of the invention, the method of preparing topcoat a is: adding inorganic nano particles into alcohol, performing ultrasonic dispersion for 10-30 min, adding an organosilicon precursor A, reacting for 10-30 min at 30-60 ℃, adding a catalyst A and water, and reacting for 4-8 h to obtain the top-coating A. The top coating A ensures the superhydrophobic property and non-tackiness of the coating.
According to some embodiments of the invention, the power of the ultrasound is 350Hz to 450Hz.
According to some embodiments of the invention, the power of the ultrasound is 400Hz.
According to some embodiments of the invention, the method of preparing topcoat B is: the organosilicon precursor B, the silane coupling agent, the catalyst B, water and alcohol are mixed and stirred at 10-80 ℃ for 2-10 hours to obtain the top-coating paint B, the top-coating paint B enables the coating to be more compact, the wear resistance of the coating is improved, and the high temperature resistance of the coating composition is improved.
According to some embodiments of the present invention, the top coating a and the top coating B may be added to an alcohol and mixed to obtain the top coating in the coating composition.
According to some embodiments of the present invention, 20 parts of top coating a and 10 parts of top coating B may be added to 70 parts of alcohol and mixed to obtain the top coating in the coating composition.
A third aspect of the present invention provides a non-stick coating comprising:
a primer layer formed from the primer coating material;
the surface coating is arranged on the surface of the bottom coating and is formed by mixing the surface coating A and the surface coating B.
The invention relates to one of the technical schemes of non-stick coating, which has at least the following beneficial effects:
the non-stick coating of the present invention is formed from the coating composition of the present invention, and thus, has all technical effects of the coating composition of the present invention. Specifically:
in order to improve the high temperature resistance of the non-stick coating, most manufacturers add inorganic compounds into the fluorine coating, however, the problem of miscibility of the inorganic compounds and the fluorine coating is difficult to solve. Manufacturers have developed new primer coating or have added a metal net-shaped structural layer on the surface of the fluorine coating, but after multiple times of heating, the peeling phenomenon can occur between the coating and the primer coating or the metal net, and the metal net has no non-tackiness and can affect the product quality. Thus, it is difficult for the prior art to break through the upper temperature use limit of the non-stick coating. According to the invention, through an organic-inorganic hybridization technology and a double-layer structure of the bottom coating and the top coating, the adhesion is ensured, the temperature resistance and the non-tackiness of the coating are improved, and finally, the coating prepared from the coating composition has superhydrophobicity and more outstanding high temperature resistance, adhesion, wear resistance and non-tackiness.
The coating composition for forming the non-stick coating comprises a primer coating, a top coating A and a top coating B, wherein the primer coating comprises inorganic acid ester, organic silicon resin and a primer catalyst, the top coating A comprises inorganic nano particles, an organic silicon precursor A and a catalyst A, the top coating B comprises an organic silicon precursor B, a silane coupling agent and a catalyst B, and the mass ratio of the top coating A to the top coating B is 1-3:1. In the primer coating, the inorganic acid ester is hydrolyzed and condensed to form a binder under the action of a catalyst, and the generated hydroxyl can form a hydrogen bond with the hydroxyl in the top coating, so that the binding force of the primer coating and the top coating is increased. The silicone resin serves to increase the adhesion of the primer coating to the substrate. The undercoating catalyst serves to catalyze the hydrolysis of the inorganic acid ester. In the top coating a, the function of the inorganic nanoparticles is to increase the surface roughness, increase the contact angle of the coating, and increase the hydrophobicity of the coating. The organosilicon precursor A has the function of hydrolytic condensation, and is used for modifying the low surface energy of inorganic nano particles to promote the superhydrophobicity of the system. The catalyst A is used for catalyzing the hydrolytic condensation reaction of the organosilicon precursor A. In the top coating B, the organosilicon precursor B has self hydrolytic condensation reaction under the action of the catalyst B, and the organosilicon precursor B has condensation reaction with the hydrolyzed silane coupling agent, so that the hydrolytic condensation can ensure the hydrophobicity of the system, and can also have adhesive effect on inorganic nano particles in the top coating A, thereby increasing the compactness of the coating. The silane coupling agent has the function of further crosslinking with the hydrolyzed organosilicon precursor B, and the synergistic effect of the silane coupling agent and the organosilicon precursor B improves the cohesiveness of the top-coating B. The catalyst B is used for catalyzing the dehydration condensation reaction of the organosilicon precursor B and the silane coupling agent.
The non-stick coating of the invention has a water contact angle of > 150 degrees.
The non-stick coating of the invention has an adhesion of class 0.
The non-stick coating of the present invention has a non-stick property of class I.
The non-stick coating of the invention has wear resistance more than 5000 times.
The non-stick coating of the invention can still maintain the non-stick property as grade I after being treated for 120 hours at 350 ℃.
According to some embodiments of the invention, the primer layer has a thickness of 10 μm to 60 μm.
According to some embodiments of the invention, the topcoat has a thickness of 5 μm to 20 μm.
According to the preparation method of the non-stick coating, the primer coating is coated on the surface of the substrate, then the top coating composition is coated, and the coated substrate is subjected to heat curing at 60-200 ℃ for 1-10 h.
According to some embodiments of the invention, the method of coating comprises dip coating, roll coating, spray coating or spin coating.
A fourth aspect of the present invention provides a cooking apparatus comprising:
a substrate;
a non-stick coating layer, the non-stick coating layer is arranged on the surface of the substrate, the non-stick coating layer is formed by the coating composition or the non-stick coating layer is the non-stick coating layer of the invention.
The invention relates to one of the technical schemes of cooking equipment, which has at least the following beneficial effects:
The cooking device of the present invention is formed from the coating composition of the present invention, and thus, has all technical effects of the coating composition of the present invention. Specifically:
according to the invention, through an organic-inorganic hybridization technology and a double-layer structure of the bottom coating and the top coating, the adhesion is ensured, the temperature resistance and the non-tackiness of the coating are improved, and finally, the coating prepared from the coating composition has superhydrophobicity and more outstanding high temperature resistance, adhesion, wear resistance and non-tackiness.
The coating composition for forming the non-stick coating comprises a primer coating, a top coating A and a top coating B, wherein the primer coating comprises inorganic acid ester, organic silicon resin and a primer catalyst, the top coating A comprises inorganic nano particles, an organic silicon precursor A and a catalyst A, the top coating B comprises an organic silicon precursor B, a silane coupling agent and a catalyst B, and the mass ratio of the top coating A to the top coating B is 1-3:1. In the primer coating, the inorganic acid ester is hydrolyzed and condensed to form a binder under the action of a catalyst, and the generated hydroxyl can form a hydrogen bond with the hydroxyl in the top coating, so that the binding force of the primer coating and the top coating is increased. The silicone resin serves to increase the adhesion of the primer coating to the substrate. The undercoating catalyst serves to catalyze the hydrolysis of the inorganic acid ester. In the top coating a, the function of the inorganic nanoparticles is to increase the surface roughness, increase the contact angle of the coating, and increase the hydrophobicity of the coating. The organosilicon precursor A has the function of hydrolytic condensation, and is used for modifying the low surface energy of inorganic nano particles to promote the superhydrophobicity of the system. The catalyst A is used for catalyzing the hydrolytic condensation reaction of the organosilicon precursor A. In the top coating B, the organosilicon precursor B has self hydrolytic condensation reaction under the action of the catalyst B, and the organosilicon precursor B has condensation reaction with the hydrolyzed silane coupling agent, so that the hydrolytic condensation can ensure the hydrophobicity of the system, and can also have adhesive effect on inorganic nano particles in the top coating A, thereby increasing the compactness of the coating. The silane coupling agent has the function of further crosslinking with the hydrolyzed organosilicon precursor B, and the synergistic effect of the silane coupling agent and the organosilicon precursor B improves the cohesiveness of the top-coating B. The catalyst B is used for catalyzing the dehydration condensation reaction of the organosilicon precursor B and the silane coupling agent.
The water contact angle of the surface of the cooking equipment is more than 150 degrees.
According to the cooking equipment disclosed by the invention, the adhesive force of the coating on the surface of the equipment is 0 grade.
The coating non-tackiness of the surface of the cooking device is grade I.
The wear resistance of the coating on the surface of the cooking equipment is more than 5000 times.
According to the cooking equipment disclosed by the invention, the coating on the surface of the equipment can still maintain the non-tackiness as grade I after being subjected to high-temperature treatment for 120 hours at 350 ℃.
Thus, the cooking device of the present invention has excellent non-stick, abrasion and high temperature resistance.
According to some embodiments of the invention, the cooking apparatus includes an oven, a range, an electric cooker, a frying pan, an air fryer, an integrated stove, a water heater, and the like.
According to some embodiments of the invention, the substrate comprises a metal substrate and a non-metal substrate.
According to some embodiments of the invention, the metal substrate comprises aluminum alloy, stainless steel, cold rolled steel, galvanized sheet, and tinplate.
According to some embodiments of the invention, the non-metallic substrate comprises glass.
Drawings
FIG. 1 is the water contact angle test results of the non-stick coating prepared in example 1.
FIG. 2 is the non-stick rating test result of the non-stick coating of example 1 under high temperature conditions of 350 ℃.
FIG. 3 is a surface microstructure of the non-stick coating prepared in example 1.
Detailed Description
The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the embodiments, but the present invention is not limited to these embodiments.
In some embodiments of the present invention, a coating composition is provided that includes a basecoat coating including an inorganic acid ester, a silicone resin, and a basecoat catalyst, a topcoat coating a including inorganic nanoparticles, a silicone precursor a, and a catalyst a, and a topcoat coating B including a silicone precursor B, a silane coupling agent, and a catalyst B.
It will be appreciated that the coating composition of the present invention comprises a primer coating, a top coating a and a top coating B, wherein the primer coating comprises an inorganic acid ester, a silicone resin and a primer catalyst, the top coating a comprises inorganic nanoparticles, a silicone precursor a and a catalyst a, and the top coating B comprises a silicone precursor B, a silane coupling agent and a catalyst B, in particular:
in the primer coating, the inorganic acid ester is hydrolyzed and condensed to form a binder under the action of the catalyst, and the generated hydroxyl can form a hydrogen bond with the hydroxyl in the top coating, so that the binding force of the primer coating and the top coating is increased. The silicone resin serves to increase the adhesion of the primer coating to the substrate. The undercoating catalyst serves to catalyze the hydrolysis of the inorganic acid ester.
In the top coating a, the function of the inorganic nanoparticles is to increase the surface roughness, increase the contact angle of the coating, and increase the hydrophobicity of the coating. The organosilicon precursor A has the function of hydrolytic condensation, and is used for modifying the low surface energy of inorganic nano particles to promote the superhydrophobicity of the system. The catalyst A is used for catalyzing the hydrolytic condensation reaction of the organosilicon precursor A.
In the top coating B, the organosilicon precursor B has self hydrolytic condensation reaction under the action of the catalyst B, and the organosilicon precursor B has condensation reaction with the hydrolyzed silane coupling agent, so that the hydrolytic condensation can ensure the hydrophobicity of the system, and can also have adhesive effect on inorganic nano particles in the top coating A, thereby increasing the compactness of the coating. The silane coupling agent has the function of further crosslinking with the hydrolyzed organosilicon precursor B, and the synergistic effect of the silane coupling agent and the organosilicon precursor B improves the cohesiveness of the top-coating B. The catalyst B is used for catalyzing the dehydration condensation reaction of the organosilicon precursor B and the silane coupling agent.
In order to improve the high temperature resistance of the non-stick coating, most manufacturers add inorganic compounds to the fluorine coating, but the problem of miscibility of the inorganic compounds with the fluorine coating is difficult to solve. The new primer coating is developed by manufacturers, or a metal net structure layer is added on the surface of the fluorine coating, but after the fluorine coating is heated for many times, the peeling phenomenon can occur between the coating and the primer coating or the metal net, and the metal net lacks non-tackiness, so that the product quality can be influenced. Thus, it is difficult for the prior art to break through the upper temperature use limit of the non-stick coating. According to the invention, through an organic-inorganic hybridization technology and a double-layer structure of the bottom coating and the top coating, the adhesion is ensured, the temperature resistance and the non-tackiness of the coating are improved, and finally, the coating prepared from the coating composition has superhydrophobicity and more outstanding high temperature resistance, adhesion, wear resistance and non-tackiness. The organic-inorganic hybridization technology refers to hybridization of inorganic nano particles and the components after the reaction, wherein the components comprise inorganic elements Si and O and organic elements C.
In some embodiments of the invention, the mass ratio of topcoat A to topcoat B is 1-3:1.
In some embodiments of the invention, the mass ratio of topcoat A to topcoat B is 2-3:1.
In some embodiments of the invention, the mass ratio of topcoat A to topcoat B is 2:1.
In some embodiments of the present invention, the primer coating comprises, in parts by mass:
inorganic acid ester: 15 to 60 parts of the components in parts by weight,
silicone resin: 1 to 40 parts of the components in parts by weight,
priming catalyst: 1 to 5 parts.
In other embodiments of the present invention, the primer coating comprises, in parts by mass:
inorganic acid ester: 20 to 50 parts of the components in parts by weight,
silicone resin: 1 to 30 parts of the components in parts by weight,
priming catalyst: 1 to 3 parts.
In some embodiments of the invention, the basecoat coating further comprises an alcohol, water, and a film-forming aid.
In some embodiments of the present invention, the primer coating comprises, based on the total parts by mass of the primer coating:
alcohol: 15 to 50 parts of the components,
water: 3 to 40 parts of the components in parts by weight,
film forming auxiliary agent: 0.1 to 2 parts.
Wherein the alcohol acts as a solvent.
The film-forming auxiliary agent has the function of improving the wettability and film-forming property of the base coat.
In some embodiments of the present invention, the primer coating comprises, based on the total parts by mass of the primer coating:
Alcohol: 15 to 45 parts of the components,
water: 3 to 33 parts of the components,
film forming auxiliary agent: 0.1 to 1 part.
In some embodiments of the invention, the inorganic acid ester is selected from at least one of ethyl orthosilicate, tetrabutyl titanate, tributyl phosphate, and methyl bisulfate.
In some embodiments of the present invention, the silicone resin is selected from at least one of methyl silicone resin, epoxy modified silicone resin, vinyl silicone resin, hydroxy silicone resin, and phenyl silicone resin.
In some embodiments of the invention, the priming catalyst is selected from at least one of sodium dihydrogen phosphate, hydrochloric acid, sodium hydroxide, sodium thiosulfate, formic acid, ammonia, sodium phosphate and acetic acid.
In some embodiments of the invention, the alcohol comprises at least one of methanol, ethanol, isopropanol, benzyl alcohol, ethylene glycol.
In some embodiments of the invention, the coalescent comprises a dodecanol ester.
The dodecanol ester is mainly used as a paint coalescing agent, can also be used as a flotation agent of gold, coal and the like, and can also be used as a plasticizer and the like.
In some embodiments of the present invention, the topcoat material a includes, in parts by mass:
inorganic nanoparticles: 1 to 25 parts of the components,
organosilicon precursor a:5 to 35 parts of the components,
catalyst A:0.01 to 2 parts.
In some embodiments of the present invention, the topcoat material a includes, in parts by mass:
inorganic nanoparticles: 1 to 20 parts of the components in parts by weight,
organosilicon precursor a:5 to 30 parts of the components,
catalyst A:0.01 to 1 part.
In some embodiments of the invention, topcoat a also includes an alcohol and water.
In some embodiments of the present invention, the topcoat a comprises, in total parts by mass of the topcoat a:
alcohol: 8 to 80 parts of the components in parts by weight,
water: 4-80 parts.
In some embodiments of the present invention, the topcoat a comprises, in total parts by mass of the topcoat a:
alcohol: 8 to 70 parts of the components,
water: 4-65 parts.
In some embodiments of the present invention, the inorganic nanoparticles are selected from at least one of cerium oxide nanoparticles, magnesium oxide nanoparticles, titanium oxide nanoparticles, silicon oxide nanoparticles, and zirconium oxide nanoparticles.
In some embodiments of the invention, the inorganic nanoparticles have a particle size in the range of 10nm to 250nm.
In some embodiments of the invention, the inorganic nanoparticles have a particle size in the range of 10nm to 200nm.
In some embodiments of the invention, the alcohol comprises at least one of methanol, ethanol, isopropanol, benzyl alcohol, ethylene glycol. The alcohol acts as a solvent.
In some embodiments of the present invention, the topcoat material B includes, in parts by mass:
organosilicon precursor B:1 to 25 parts of the components,
silane coupling agent: 5 to 50 parts of the components,
catalyst B:0.01 to 2 parts.
In some embodiments of the present invention, the topcoat material B includes, in parts by mass:
organosilicon precursor B:1 to 20 parts of the components in parts by weight,
silane coupling agent: 5 to 40 parts of the components,
catalyst B:0.01 to 1 part.
In some embodiments of the invention, topcoat B also includes an alcohol and water.
In some embodiments of the present invention, the topcoat B comprises, in total parts by mass of the topcoat B:
alcohol: 5 to 80 parts of the components in parts by weight,
water: 1 to 50 parts.
In some embodiments of the present invention, the topcoat B comprises, in total parts by mass of the topcoat B:
alcohol: 5 to 70 parts of the components,
water: 1 to 40 parts.
In some embodiments of the present invention, the silicone precursor a and the silicone precursor B are not the same and are each independently selected from at least one of methyltrimethoxysilane, methyltriethoxysilane, dimethyldimethoxysilane, methylphenyldimethoxysilane, dodecyltriethoxysilane, hexadecyltrimethoxysilane, hexamethyldisilazane, and heptamethyltrisiloxane.
In some embodiments of the invention, the silane coupling agent comprises at least one or more of trifluoropropyl trimethoxysilane, KH550, KH560, KH570, KH792, KH590, GR-300, KR-12, and Z-6172.
KH-550 is 3-aminopropyl triethoxysilane, which is amino functional silane and is basic. The appearance is colorless or yellowish transparent liquid, has strong universality and can be dissolved in organic solvents.
KH560 is gamma-glycidol ether oxypropyl trimethoxy silane, which is a coupling agent containing epoxy group, used for caulk compound and sealant of polysulfide and polyurethane, adhesive for epoxy resin, filled or reinforced thermosetting resin, glass fiber adhesive, thermoplastic resin for inorganic filling or glass reinforcement, etc.
KH570 Chinese name is gamma-methacryloxypropyl trimethoxy silane, which is an organic functional silane coupling agent.
KH792 is N- (beta-aminoethyl) -gamma-aminopropyl trimethyl (ethoxyl) silane, double amino functional silane, and the appearance is light yellow transparent liquid.
The KH590 Chinese name is gamma-mercaptopropyl trimethoxy silane, which has mercapto functional group and has special efficacy as metal surface rust inhibitor, and can be used for treating metal surfaces such as gold, silver, copper and the like to improve the corrosion resistance and oxidation resistance and the bonding property of the metal surfaces to high polymer materials.
The GR-300 Chinese name is isopropyl triisostearate titanate, which can reduce the system viscosity and the solvent consumption, simultaneously endow the coating with wear resistance and corrosion resistance, reduce the baking temperature and shorten the baking time.
The KR-12 is named as isopropyl tri (dioctyl phosphate acyloxy) titanate, and is mainly used in alkyd paint in the paint and paint industry, so that the baking temperature can be reduced, and the baking time can be shortened. Has better dispersing and anti-sinking effects on pigment. The anti-settling and caking-preventing effect is particularly remarkable when the anti-settling and caking-preventing agent is used for acrylic baking paint.
Z-6172 is also a silane coupling agent, which is suitable for treating inorganic matters such as clay, glass fiber and the like and the surfaces of materials such as rubber, plastics and the like.
In some embodiments of the present invention, the catalyst a and the catalyst B are different and are each independently selected from at least one of sodium dihydrogen phosphate, hydrochloric acid, sodium hydroxide, sodium thiosulfate, formic acid, ammonia water, sodium phosphate and acetic acid.
In some embodiments of the invention, the mass ratio of topcoat A, topcoat B, and alcohol is 1-3:1:7.
In some embodiments of the invention, the mass ratio of topcoat a, topcoat B, and alcohol is 2:1:7.
In the top coating material a and the top coating material B, the ranges of the organosilicon precursor a and the organosilicon precursor B are the same, and the ranges of the catalyst a and the catalyst B are the same, but the organosilicon precursor a and the organosilicon precursor B are not commonly used, and the catalyst a and the catalyst B are not commonly used because of inconsistent catalytic activities, which affects the reaction speed of the system and the stability of the system. By "non-universable" it is meant that the organosilicon precursor a and the organosilicon precursor B cannot be the same reagent, nor the catalyst a and the catalyst B.
In still other embodiments of the present invention, the present invention provides a method of preparing a coating composition of the present invention, the method comprising: and respectively mixing the preparation raw materials of the base coating, the top coating A and the top coating B to obtain the base coating, the top coating A and the top coating B.
It can be appreciated that the method for preparing the coating composition of the present invention can obtain the primer coating, the top coating a and the top coating B by only mixing the preparation raw materials of the primer coating, the top coating a and the top coating B, respectively, and the preparation method is simple, does not need complicated process control and harsh process conditions, does not need expensive equipment, and is easy for process production.
In some embodiments of the invention, the primer coating is prepared by: reacting inorganic acid ester, alcohol, water and a primer catalyst for 10-24 hours at 40-80 ℃, adding organic silicon resin and a film-forming auxiliary agent after the reaction is finished, and continuing the reaction for 2-10 hours to obtain the primer coating. The primer coating has higher adhesive force, and can ensure that the coating is not separated from the substrate when being heated.
In some embodiments of the present invention, the method of preparing topcoat A is: adding inorganic nano particles into alcohol, performing ultrasonic dispersion for 10-30 min, adding an organosilicon precursor A, reacting for 10-30 min at 30-60 ℃, adding a catalyst A and water, and reacting for 4-8 h to obtain the top-coating A. The top coating A ensures the superhydrophobic property and non-tackiness of the coating.
In some embodiments of the invention, the power of the ultrasound is 350Hz to 450Hz.
In some embodiments of the invention, the power of the ultrasound is 400Hz.
In some embodiments of the invention, the method of preparing topcoat B is: the organosilicon precursor B, the silane coupling agent, the catalyst B, water and alcohol are mixed and stirred at 10-80 ℃ for 2-10 hours to obtain the top-coating paint B, the top-coating paint B enables the coating to be more compact, the wear resistance of the coating is improved, and the high temperature resistance of the coating composition is improved.
In some embodiments of the present invention, topcoat A and topcoat B may be added to an alcohol and mixed to obtain a topcoat in a coating composition.
In some embodiments of the present invention, 20 parts of topcoat a and 10 parts of topcoat B may be added to 70 parts of alcohol and mixed with stirring to obtain a topcoat in the coating composition.
In other embodiments of the invention, the invention provides a non-stick coating comprising:
a primer layer formed from the primer coating material of the present invention;
the surface coating is arranged on the surface of the bottom coating and is formed by mixing the surface coating A and the surface coating B.
It will be appreciated that the non-stick coating of the present invention is formed from the coating composition of the present invention, thereby providing all of the technical effects of the coating composition of the present invention. Specifically:
In order to improve the high temperature resistance of the non-stick coating, most manufacturers add inorganic compounds into the fluorine coating, however, the problem of miscibility of the inorganic compounds and the fluorine coating is difficult to solve. Manufacturers have developed new primer coating or have added a metal net-shaped structural layer on the surface of the fluorine coating, but after multiple times of heating, the peeling phenomenon can occur between the coating and the primer coating or the metal net, and the metal net has no non-tackiness and can affect the product quality. Thus, it is difficult for the prior art to break through the upper temperature use limit of the non-stick coating. According to the invention, through an organic-inorganic hybridization technology and a double-layer structure of the bottom coating and the top coating, the adhesion is ensured, the temperature resistance and the non-tackiness of the coating are improved, and finally, the coating prepared from the coating composition has superhydrophobicity and more outstanding high temperature resistance, adhesion, wear resistance and non-tackiness. The organic-inorganic hybridization technology refers to hybridization of inorganic nano particles and the components after the reaction, wherein the components comprise inorganic elements Si and O and organic elements C.
The coating composition for forming the non-stick coating comprises a primer coating, a top coating A and a top coating B, wherein the primer coating comprises inorganic acid ester, organic silicon resin and a primer catalyst, the top coating A comprises inorganic nano particles, organic silicon precursors A and a catalyst A, the top coating B comprises organic silicon precursors B, a silane coupling agent and a catalyst B, and the mass ratio of the top coating A to the top coating B is 1-3:1. In the primer coating, the inorganic acid ester is hydrolyzed and condensed to form a binder under the action of a catalyst, and the generated hydroxyl can form a hydrogen bond with the hydroxyl in the top coating, so that the binding force of the primer coating and the top coating is increased. The silicone resin serves to increase the adhesion of the primer coating to the substrate. The undercoating catalyst serves to catalyze the hydrolysis of the inorganic acid ester. In the top coating a, the function of the inorganic nanoparticles is to increase the surface roughness, increase the contact angle of the coating, and increase the hydrophobicity of the coating. The organosilicon precursor A has the function of hydrolytic condensation, and is used for modifying the low surface energy of inorganic nano particles to promote the superhydrophobicity of the system. The catalyst A is used for catalyzing the hydrolytic condensation reaction of the organosilicon precursor A. In the top coating B, the organosilicon precursor B has self hydrolytic condensation reaction under the action of the catalyst B, and the organosilicon precursor B has condensation reaction with the hydrolyzed silane coupling agent, so that the hydrolytic condensation can ensure the hydrophobicity of the system, and can also have adhesive effect on inorganic nano particles in the top coating A, thereby increasing the compactness of the coating. The silane coupling agent has the function of further crosslinking with the hydrolyzed organosilicon precursor B, and the synergistic effect of the silane coupling agent and the organosilicon precursor B improves the cohesiveness of the top-coating B. The catalyst B is used for catalyzing the dehydration condensation reaction of the organosilicon precursor B and the silane coupling agent.
The non-stick coating of the invention has a water contact angle of > 150 degrees.
The non-stick coating of the invention has an adhesion of class 0.
The non-stick coating of the present invention has a non-stick property of class I.
The non-stick coating of the invention has wear resistance more than 5000 times.
The non-stick coating of the invention can still maintain the non-stick property as grade I after being treated for 120 hours at 350 ℃.
In some embodiments of the invention, the primer layer has a thickness of 10 μm to 60 μm.
In some embodiments of the invention, the topcoat has a thickness of 5 μm to 20 μm.
In some embodiments of the invention, the non-stick coating has a thickness of 10 μm to 80 μm.
In some embodiments of the invention, the non-stick coating has a thickness of 60 μm to 80 μm.
According to the preparation method of the non-stick coating, the primer coating is coated on the surface of the substrate, then the top coating composition is coated, and the coated substrate is subjected to heat curing at 60-200 ℃ for 1-10 h.
In some embodiments of the invention, the method of coating comprises dip coating, roll coating, spray coating, or spin coating.
In some further embodiments of the present invention, the present invention provides a cooking apparatus comprising:
a substrate;
a non-stick coating layer disposed on a surface of a substrate, the non-stick coating layer being formed from the coating composition of the present invention.
It will be appreciated that the cooking apparatus of the present invention is formed from the coating composition of the present invention, thereby providing all of the technical effects of the coating composition of the present invention. Specifically:
it can be further understood that the invention adopts a double-layer structure of the primer coating and the top coating through an organic-inorganic hybridization technology, so that the adhesion is ensured, the temperature resistance and the non-tackiness of the coating are improved, and finally, the coating prepared from the coating composition has superhydrophobicity and more outstanding high temperature resistance, adhesion, wear resistance and non-tackiness. The organic-inorganic hybridization technology refers to hybridization of inorganic nanoparticles and the components after the reaction, wherein the other components contain inorganic elements (Si and O) and organic elements C.
The coating composition for forming the non-stick coating comprises a primer coating, a top coating A and a top coating B, wherein the primer coating comprises inorganic acid ester, organic silicon resin and a primer catalyst, the top coating A comprises inorganic nano particles, organic silicon precursors A and a catalyst A, the top coating B comprises organic silicon precursors B, a silane coupling agent and a catalyst B, and the mass ratio of the top coating A to the top coating B is 1-3:1. In the primer coating, the inorganic acid ester is hydrolyzed and condensed to form a binder under the action of a catalyst, and the generated hydroxyl can form a hydrogen bond with the hydroxyl in the top coating, so that the binding force of the primer coating and the top coating is increased. The silicone resin serves to increase the adhesion of the primer coating to the substrate. The undercoating catalyst serves to catalyze the hydrolysis of the inorganic acid ester. In the top coating a, the function of the inorganic nanoparticles is to increase the surface roughness, increase the contact angle of the coating, and increase the hydrophobicity of the coating. The organosilicon precursor A has the function of hydrolytic condensation, and is used for modifying the low surface energy of inorganic nano particles to promote the superhydrophobicity of the system. The catalyst A is used for catalyzing the hydrolytic condensation reaction of the organosilicon precursor A. In the top coating B, the organosilicon precursor B has self hydrolytic condensation reaction under the action of the catalyst B, and the organosilicon precursor B has condensation reaction with the hydrolyzed silane coupling agent, so that the hydrolytic condensation can ensure the hydrophobicity of the system, and can also have adhesive effect on inorganic nano particles in the top coating A, thereby increasing the compactness of the coating. The silane coupling agent has the function of further crosslinking with the hydrolyzed organosilicon precursor B, and the synergistic effect of the silane coupling agent and the organosilicon precursor B improves the cohesiveness of the top-coating B. The catalyst B is used for catalyzing the dehydration condensation reaction of the organosilicon precursor B and the silane coupling agent.
The water contact angle of the surface of the cooking equipment is more than 150 degrees.
According to the cooking equipment disclosed by the invention, the adhesive force of the coating on the surface of the equipment is 0 grade.
The coating non-tackiness of the surface of the cooking device is grade I.
The wear resistance of the coating on the surface of the cooking equipment is more than 5000 times.
According to the cooking equipment disclosed by the invention, the coating on the surface of the equipment can still maintain the non-tackiness as grade I after being subjected to high-temperature treatment for 120 hours at 350 ℃.
Thus, the cooking device of the present invention has excellent non-stick, abrasion and high temperature resistance.
In some embodiments of the present invention, the cooking apparatus includes an oven, a range, an electric cooker, a frying pan, an air fryer, an integrated stove, a water heater, and the like.
In some embodiments of the invention, the metal substrate comprises aluminum alloy, stainless steel, cold rolled steel, galvanized sheet, and tinplate.
In some embodiments of the invention, the nonmetallic substrate comprises glass.
The oven, the cooking bench, the electric cooker, the frying pan, the air frying pan, the integrated kitchen, the water heater and the like all have high-temperature working environments, and the non-stick coating has the properties of non-stick, wear resistance and high temperature resistance, so that the performance and the service life of equipment are improved, and the user experience is better.
The technical solution of the present invention will be better understood by combining the following specific embodiments.
Example 1
The present example first prepared a coating composition, specifically:
and (3) preparing a bottom coating:
according to the mass percentage, 23% of ethyl orthosilicate, 40% of ethanol, 15% of water and 1.5% of hydrochloric acid are mixed and reacted for 24 hours at 60 ℃, and after the reaction is finished, 20% of epoxy modified silicon resin and 0.5% of film forming auxiliary agent are added for continuous reaction for 10 hours.
Wherein, tetraethoxysilane is purchased from microphone reagent, CAS number: 78-10-4.
The concentration of hydrochloric acid is 1mol/L.
Epoxy modified silicone resins were purchased from new materials limited in the four seas of the lozenges.
The film forming auxiliary agent is dodecanol ester.
And (3) preparing a top coating:
and (3) a top coating A: adding 1% silicon oxide nano particles into 73% ethanol according to mass percentage, performing ultrasonic dispersion for 30min (ultrasonic power 400 Hz), adding 5% dimethyl dimethoxy silane, reacting for 10min at 60 ℃, adding 1% acetic acid and 20% water, and reacting for 5h to obtain the top coating A.
And (3) a top coating B: according to the mass percentage, 16% of methyltrimethoxysilane, 10% of KH550, 0.1% of hydrochloric acid and 10% of water are mixed with 63.9% of ethanol, and the mixture is stirred and reacted for 10 hours at 30 ℃ to obtain the top coating B.
Wherein the concentration of hydrochloric acid is 0.5mol/L.
And adding 20 parts of the top coating A and 10 parts of the top coating B into 70 parts of ethanol, mixing and stirring for 30min, and thus obtaining the top coating composition.
Then, using the coating composition prepared above, a non-stick coating was prepared, specifically:
spraying the primer coating on the surface of the aluminum alloy plate, then spraying the top coating composition, and thermally curing the coated aluminum alloy at 100 ℃ for 1h. After the primer coating is sprayed, the top coating composition can be directly sprayed without waiting for the primer to dry.
Example 2
The present example first prepared a coating composition, specifically:
and (3) preparing a bottom coating:
42% tributyl phosphate, 18% benzyl alcohol, 33% water and 1% sodium phosphate are mixed and reacted for 10 hours at 40 ℃, and after the reaction is finished, 5% phenyl silicone resin and 1% film forming auxiliary agent are added for continuous reaction for 2 hours.
Among them, phenyl silicone resin was purchased from the company dakaning.
The film forming auxiliary agent is dodecanol ester.
And (3) preparing a top coating:
and (3) a top coating A: adding 15% cerium oxide nano particles into 50% ethanol, performing ultrasonic dispersion for 10min (ultrasonic power 400 Hz), adding 10% methyl phenyl dimethoxy silane, reacting at 30 ℃ for 12min, adding 0.05% ammonia water and 24.95% water, and reacting for 4h to obtain the top-coating A.
And (3) a top coating B: 1% methyltriethoxysilane, 40% KH570, 1% acetic acid, 1% water and 57% ethanol are mixed and stirred at 10 ℃ for reaction for 10 hours to obtain the top coating B.
And adding 20 parts of the top coating A and 10 parts of the top coating B into 70 parts of ethanol, mixing and stirring for 30min, and thus obtaining the top coating composition.
Then, using the coating composition prepared above, a non-stick coating was prepared, specifically:
spraying the prime coating on the surface of the tinplate, then spraying the coating composition on the surface of the tinplate, and thermally curing the coated tinplate for 3 hours at 200 ℃.
Example 3
The present example first prepared a coating composition, specifically:
and (3) preparing a bottom coating:
36% of methyl bisulfate, 45% of isopropanol, 3% of water and 1.9% of sodium thiosulfate are mixed and reacted for 15 hours at 60 ℃, and after the reaction is finished, 14% of hydroxyl silicone resin and 0.1% of film forming auxiliary agent are added for continuous reaction for 5 hours.
And (3) preparing a top coating:
and (3) a top coating A: adding 20% magnesium oxide nano particles into 8% ethanol, performing ultrasonic dispersion for 20min (ultrasonic power 400 Hz), adding 6% hexamethyldisilazane, reacting at 45 ℃ for 20min, adding 1% sodium dihydrogen phosphate and 65% water, and reacting for 5h to obtain the top-coating A.
And (3) a top coating B: 10% of methyltrimethoxysilane, 30% of trifluoropropyl trimethoxysilane, 0.1% of formic acid, 40% of water and 9.9% of ethanol are mixed and stirred at 50 ℃ for reaction for 8 hours to obtain the top coating B.
And adding 20 parts of the top coating A and 10 parts of the top coating B into 70 parts of ethanol, mixing and stirring for 30min, and thus obtaining the top coating composition.
Then, using the coating composition prepared above, a non-stick coating was prepared, specifically:
spraying the primary coating on the surface of the cold-rolled steel plate, then spraying the primary coating composition, and thermally curing the coated cold-rolled steel plate at 180 ℃ for 6 hours.
Example 4
The present example first prepared a coating composition, specifically:
and (3) preparing a bottom coating:
tetrabutyl titanate 20%, methanol 20%, water 26.5% and sodium hydroxide 3% are mixed and reacted for 18 hours at 80 ℃, 30% methyl silicone resin and 0.5% film forming auxiliary agent are added after the reaction is finished, and the reaction is continued for 8 hours.
And (3) preparing a top coating:
and (3) a top coating A: adding 5% titanium oxide nano particles into 70% ethanol, performing ultrasonic dispersion for 30min (ultrasonic power 400 Hz), adding 20% hexadecyl trimethoxy silane, reacting at 50 ℃ for 30min, adding 0.08% formic acid and 4.92% water, and reacting for 8h to obtain the top coating A.
And (2) surface coating B: mixing 20% of heptamethyltrisiloxane, 5% of KH792, 0.5% of ammonia water, 4.5% of water and 70% of ethanol, and stirring at 80 ℃ for 2 hours to obtain the top-coating B.
And adding 20 parts of the top coating A and 10 parts of the top coating B into 70 parts of ethanol, mixing and stirring for 30min, and thus obtaining the top coating composition.
Then, using the coating composition prepared above, a non-stick coating was prepared, specifically:
spraying the primer coating on the surface of the stainless steel plate, then spraying the top coating composition, and thermally curing the coated stainless steel at 60 ℃ for 10 hours.
Example 5
The present example first prepared a coating composition, specifically:
and (3) preparing a bottom coating:
50% of ethyl orthosilicate, 28.9% of ethylene glycol, 10% of water and 1% of hydrochloric acid are mixed and reacted for 22 hours at 50 ℃, and after the reaction is finished, 10% of vinyl silicone resin and 0.1% of film forming auxiliary agent are added for continuous reaction for 10 hours;
and (3) preparing a top coating:
and (3) a top coating A: adding 10% zirconia nano particles into 9.99% ethanol, performing ultrasonic dispersion for 10min (ultrasonic power 400 Hz), adding 30% dodecyl triethoxysilane, reacting at 60 ℃ for 15min, adding 0.01% acetic acid and 50% water, and reacting for 6h to obtain the top-coating A.
And (2) surface coating B: 5% of dodecyl triethoxysilane, 35% of KH560, 0.1% of sodium hydroxide, 20% of water and 39.9% of ethanol are mixed and stirred at 60 ℃ for reaction for 1h to obtain the top coating B.
And adding 20 parts of the top coating A and 10 parts of the top coating B into 70 parts of ethanol, mixing and stirring for 30min to obtain the top coating composition.
Then, using the coating composition prepared above, a non-stick coating was prepared, specifically:
Spraying the primary coating on the surface of the galvanized sheet, then spraying the primary coating composition, and thermally curing the coated galvanized sheet at 150 ℃ for 6 hours.
Comparative example 1 (without primer)
A coating composition and coating were prepared according to this comparative example, which differs from example 1 in that there is no base coat, and the top coat A and top coat B components are the same as in example 1.
Comparative example 2 (topless A)
This comparative example produces a coating composition and coating, primer coating and topcoat coating B the same as in example 1, without topcoat coating A.
Comparative example 3 (topless B)
This comparative example produces a coating composition and coating, primer coating and topcoat coating A as in example 1, without topcoat coating B.
Coating Performance test
The coatings prepared in example 1 and comparative examples 1 to 3 were tested for water contact angle, adhesion, abrasion resistance and temperature resistance. The results are shown in Table 1.
TABLE 1
In the test results of table 1, the base material was an aluminum alloy plate. The thickness of the primer coat is 35 mu m, and the thickness of the top coat is 10 mu m.
As can be seen from the comparison effect of the table, the technical scheme adopted by the invention has more excellent performances in hydrophobicity, adhesive force, wear resistance, temperature resistance and durability compared with the comparison scheme.
In the test results of Table 1, the adhesion test was based on the standard GB/T6739-2006 test for paint film hardness by the color paint and varnish pencil method.
The abrasion resistance testing method comprises the following steps: the industrial scouring pad 3M7447C carries a weight of 1.5kg to rub the sample back and forth, the scouring pad is replaced once after every 500 times of rubbing until the base material is exposed, and the rubbing times are recorded.
The temperature resistance test method comprises the following steps: the sample plate is placed in a high-temperature oven at 350 ℃, the non-tackiness is tested after being taken out every 2-30 hours, and the non-tackiness test method refers to GB/T32095.2-2015 until the non-tackiness fails.
The water contact angle test results of the non-stick coating prepared in example 1 are shown in fig. 1.
In Table 1, the non-stick coating of example 1 has a temperature resistance of > 350℃and shows that the coating remains non-stick grade I after 120 hours of high temperature treatment at 350 ℃. The non-stick rating test results of the non-stick coating of example 1 at a high temperature of 350 c are shown in fig. 2.
In addition, the surface morphology of the non-stick coating prepared in example 1 was observed by scanning electron microscopy, as shown in fig. 3. It can be seen that the non-stick coating prepared in example 1 was dense and uniform in surface, and no defects such as cracks and protrusions were observed.
The present invention has been described in detail with reference to the embodiments, but the present invention is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (18)
1. A coating composition, which is characterized by comprising a base coating, a top coating A and a top coating B, wherein the base coating comprises inorganic acid ester, organic silicon resin and a base coating catalyst, the top coating A comprises inorganic nano particles, organic silicon precursor A and catalyst A, and the top coating B comprises organic silicon precursor B, silane coupling agent and catalyst B;
the preparation method of the primer coating comprises the following steps: reacting the inorganic acid ester, alcohol, water and the base coating catalyst at 40-80 ℃ for 10-24 hours, adding the organic silicon resin and the film-forming auxiliary agent after the reaction is finished, and continuing the reaction for 2-10 hours to obtain the base coating;
the preparation method of the top-coating A comprises the following steps: adding the inorganic nano particles into alcohol, performing ultrasonic dispersion for 10-30 min, adding the organic silicon precursor A, reacting at 30-60 ℃ for 10-30 min, adding the catalyst A and water, and reacting for 4-8 h to obtain the top-coating A;
the preparation method of the top-coating B comprises the following steps: mixing the organosilicon precursor B, the silane coupling agent, the catalyst B, water and alcohol, and stirring at 10-80 ℃ for 2-10 hours to obtain the top-coating paint B.
2. The coating composition according to claim 1, wherein the mass ratio of the top coating A to the top coating B is 1-3:1.
3. The coating composition according to claim 1, wherein the primer coating comprises, in parts by mass:
inorganic acid ester: 15-60 parts of a compound, namely,
silicone resin: 1 to 40 parts of the components,
priming catalyst: 1-5 parts.
4. The coating composition of claim 3, wherein the basecoat coating further comprises an alcohol, water, and a film-forming aid.
5. The coating composition according to claim 4, wherein the primer coating further comprises, in parts by mass of the primer coating:
alcohol: 15-50 parts of a compound, namely,
water: 3-40 parts of a compound containing,
film forming auxiliary agent: 0.1-2 parts.
6. The coating composition according to claim 1, wherein the topcoat a comprises, in parts by mass:
inorganic nanoparticles: 1 to 25 parts of the components,
organosilicon precursor a:5 to 35 parts of the components,
catalyst A:0.01 to 2 parts.
7. The coating composition according to claim 1, wherein the topcoat material B comprises, in parts by mass:
organosilicon precursor B:1 to 25 parts of the components,
silane coupling agent: 5 to 50 parts of the components,
catalyst B:0.01 to 2 parts.
8. The coating composition of any one of claims 1 to 7, wherein the inorganic acid ester is selected from at least one of ethyl orthosilicate and tetrabutyl titanate.
9. The coating composition of any one of claims 1 to 7, wherein the silicone resin is selected from at least one of methyl silicone resin, epoxy modified silicone resin, vinyl silicone resin, hydroxyl silicone resin, and phenyl silicone resin.
10. The coating composition of any one of claims 1 to 7, wherein the undercoating catalyst is selected from at least one of sodium dihydrogen phosphate, hydrochloric acid, sodium hydroxide, sodium thiosulfate, formic acid, ammonia water, sodium phosphate, and acetic acid.
11. The coating composition of any one of claims 1 to 7, wherein the inorganic nanoparticles are selected from at least one of cerium oxide nanoparticles, magnesium oxide nanoparticles, titanium oxide nanoparticles, silicon oxide nanoparticles, and zirconium oxide nanoparticles.
12. The coating composition of any one of claims 1 to 7, wherein the silicone precursor a and the silicone precursor B are not the same and are each independently selected from at least one of methyltrimethoxysilane, methyltriethoxysilane, dimethyldimethoxysilane, methylphenyldimethoxysilane, dodecyltriethoxysilane, hexadecyltrimethoxysilane, hexamethyldisilazane, and heptamethyltrisiloxane.
13. The coating composition according to any one of claims 1 to 7, wherein the catalyst a and the catalyst B are not the same and are each independently selected from at least one of sodium dihydrogen phosphate, hydrochloric acid, sodium hydroxide, sodium thiosulfate, formic acid, ammonia water, sodium phosphate and acetic acid.
14. A non-stick coating comprising:
a base coat formed by curing the base coat paint according to any one of claims 1 to 13;
a top coat layer provided on the surface of the primer layer, and formed by mixing and curing the top coat paint a and the top coat paint B according to any one of claims 1 to 13.
15. The non-stick coating of claim 14 wherein the primer layer has a thickness of 10 μm to 60 μm.
16. The non-stick coating of claim 14 wherein the topcoat has a thickness of 5 μm to 20 μm.
17. A cooking apparatus, comprising:
a substrate;
a non-stick coating provided on the surface of the substrate, the non-stick coating being formed from the coating composition of any one of claims 1 to 13, or the non-stick coating being a non-stick coating of any one of claims 14 to 16.
18. The cooking apparatus of claim 17, wherein the cooking apparatus comprises an oven, a range, an electric cooker, a frying pan, an air fryer, an integrated stove, and a water heater.
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005119753A2 (en) * | 2004-04-30 | 2005-12-15 | Nanosys, Inc. | Systems and methods for nanowire growth and harvesting |
| KR20110101865A (en) * | 2010-03-10 | 2011-09-16 | 라채근 | Method for producing inorganic ceramic coating agent and it's coating method |
| CN104057670A (en) * | 2014-04-02 | 2014-09-24 | 浙江鹏孚隆科技有限公司 | Double-layer coating and coating method thereof |
| CN104212341A (en) * | 2014-09-18 | 2014-12-17 | 东华大学 | Far infrared emission high-temperature-resistant kitchen and bath paint and preparation method thereof |
| KR20140147358A (en) * | 2013-06-19 | 2014-12-30 | 주식회사 부광산업 | The non-stick coating multi-layer composite sheet for cookware |
| CN106280983A (en) * | 2016-08-22 | 2017-01-04 | 深圳市新亚新材料有限公司 | A kind of add-on type thickening silane coupling agent and preparation method thereof |
| CN109330390A (en) * | 2018-09-30 | 2019-02-15 | 浙江宇达新材料有限公司 | Inorganic ceramic non-stick pan composite coating and its manufacturing method |
| CN111269651A (en) * | 2020-04-10 | 2020-06-12 | 浙江添越新材料有限公司 | High-hardness water-based non-stick coating and preparation method thereof |
| CN111808485A (en) * | 2020-07-20 | 2020-10-23 | 江南大学 | Wear-resistant high-temperature-resistant composite non-stick coating |
| CN112876983A (en) * | 2021-01-19 | 2021-06-01 | 佛山市思博睿科技有限公司 | Fluorine-free super-hydrophobic modified silicon dioxide composite resin coating and preparation method thereof |
| CN113429882A (en) * | 2021-06-21 | 2021-09-24 | 广东工业大学 | Antibacterial easy-to-clean tableware coating and preparation method and application thereof |
| CN113717633A (en) * | 2021-05-08 | 2021-11-30 | 杭州师范大学 | Primer for bonding silicon resin thermal protection coating and preparation method and application thereof |
| CN115260899A (en) * | 2022-07-28 | 2022-11-01 | 广东美的白色家电技术创新中心有限公司 | Hydrophobic coating and preparation method and application thereof |
-
2022
- 2022-12-01 CN CN202211530898.4A patent/CN115820112B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005119753A2 (en) * | 2004-04-30 | 2005-12-15 | Nanosys, Inc. | Systems and methods for nanowire growth and harvesting |
| KR20110101865A (en) * | 2010-03-10 | 2011-09-16 | 라채근 | Method for producing inorganic ceramic coating agent and it's coating method |
| KR20140147358A (en) * | 2013-06-19 | 2014-12-30 | 주식회사 부광산업 | The non-stick coating multi-layer composite sheet for cookware |
| CN104057670A (en) * | 2014-04-02 | 2014-09-24 | 浙江鹏孚隆科技有限公司 | Double-layer coating and coating method thereof |
| CN104212341A (en) * | 2014-09-18 | 2014-12-17 | 东华大学 | Far infrared emission high-temperature-resistant kitchen and bath paint and preparation method thereof |
| CN106280983A (en) * | 2016-08-22 | 2017-01-04 | 深圳市新亚新材料有限公司 | A kind of add-on type thickening silane coupling agent and preparation method thereof |
| CN109330390A (en) * | 2018-09-30 | 2019-02-15 | 浙江宇达新材料有限公司 | Inorganic ceramic non-stick pan composite coating and its manufacturing method |
| CN111269651A (en) * | 2020-04-10 | 2020-06-12 | 浙江添越新材料有限公司 | High-hardness water-based non-stick coating and preparation method thereof |
| CN111808485A (en) * | 2020-07-20 | 2020-10-23 | 江南大学 | Wear-resistant high-temperature-resistant composite non-stick coating |
| CN112876983A (en) * | 2021-01-19 | 2021-06-01 | 佛山市思博睿科技有限公司 | Fluorine-free super-hydrophobic modified silicon dioxide composite resin coating and preparation method thereof |
| CN113717633A (en) * | 2021-05-08 | 2021-11-30 | 杭州师范大学 | Primer for bonding silicon resin thermal protection coating and preparation method and application thereof |
| CN113429882A (en) * | 2021-06-21 | 2021-09-24 | 广东工业大学 | Antibacterial easy-to-clean tableware coating and preparation method and application thereof |
| CN115260899A (en) * | 2022-07-28 | 2022-11-01 | 广东美的白色家电技术创新中心有限公司 | Hydrophobic coating and preparation method and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| Surface properties of sol–gel-based fluorine-containing ceramic coatings;Mustafa Hulusi Uğur等;Journal of Sol-Gel Science and Technology;第87卷;113–124 * |
| 有机硅复合功能涂层及其功能化应用研究;王林;中国优秀硕士学位论文全文数据库工程科技Ⅰ辑(第03期);B018-24 * |
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