CN110951287B - High-temperature-resistant ceramic coating and preparation method thereof - Google Patents

High-temperature-resistant ceramic coating and preparation method thereof Download PDF

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CN110951287B
CN110951287B CN201911031218.2A CN201911031218A CN110951287B CN 110951287 B CN110951287 B CN 110951287B CN 201911031218 A CN201911031218 A CN 201911031218A CN 110951287 B CN110951287 B CN 110951287B
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ceramic coating
silica sol
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CN110951287A (en
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张春健
张博伦
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Zhejiang Yuhui New Material Technology Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D1/00Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D183/00Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04Polysiloxanes
    • C09D183/08Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18Fireproof paints including high temperature resistant paints
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/61Additives non-macromolecular inorganic
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00Properties
    • C08L2201/08Stabilised against heat, light or radiation or oxydation

Abstract

The invention discloses a high-temperature-resistant ceramic coating, which relates to the field of coatings and comprises a component A and a component B in a mass ratio of 1: 1; the component A comprises the following raw materials in parts by weight: 25-30 parts of modified silane, 1-1.5 parts of flatting agent, 0.3-0.5 part of formic acid and 0.1-0.2 part of potassium hydroxide; the component B comprises the following raw materials in parts by weight: 50-60 parts of silica sol, 5-10 parts of mica powder and 15-20 parts of silica micropowder; 10-15 parts of water. The modified silane is used as a main film forming material and is closely related to the heat resistance of the coating. Gamma-aminopropyl methyl dimethoxy silane is used as a modified silane matrix, has good bonding performance with inorganic materials, introduces imide rings with excellent thermal stability into a molecular chain after modification, and greatly improves the high temperature resistance of a film layer.

Description

High-temperature-resistant ceramic coating and preparation method thereof
Technical Field
The invention relates to a coating, in particular to a high-temperature resistant ceramic coating and a preparation method thereof.
Background
The ceramic coating is a novel coating with organic and inorganic excellent performances, and has the advantages of high hardness, wear resistance, non-sticking, hydrophobicity and oleophobicity, good flexibility, impact resistance, good weather resistance and the like. The ceramic coating has excellent performance in all aspects, and is widely applied to non-stick pan, automobile exhaust pipe, aluminum curtain wall, chemical storage tank and the like. The ceramic coating is prepared by taking a nano inorganic compound and a binder as main components, adding other auxiliaries and taking water as dispersoids, and is cured by a low-temperature heating mode after coating, so that the ceramic coating is very environment-friendly. When the ceramic coating is used for non-stick pan, compared with the prior common Teflon coating, the ceramic coating has better high temperature resistance and wear resistance, and can not release toxic gas.
Chinese patent with publication number CN104059526B discloses a nonstick coating with oxidation resistance for tableware, which comprises the following raw materials by mass percent: 35-45% of the component A, 20-30% of the component B, 1-3% of a filler and the balance of isopropanol; the component A is alkyl silica, the component B is a mixture of beta-heptamethyl trisiloxane-ethyl trimethoxy silane and nano silver particles, and the molar ratio of the beta-heptamethyl trisiloxane-ethyl trimethoxy silane to the nano silver particles is 1: 0.2; the filler is one or a mixture of more of silicon dioxide whisker, alumina whisker, nano-scale precipitated barium sulfate and potassium tetratitanate whisker.
The non-stick coating belongs to ceramic coating, organosilane is mixed with inorganic ceramic filler to be used as a raw material, the heat resistance can reach more than 300 ℃, and the heat resistance of the non-stick coating is completely in accordance with requirements when the non-stick coating is used for tableware. However, in the place where the working temperature of the boiler reaches 500 ℃ or even 700 ℃, the requirement cannot be met.
Disclosure of Invention
Aiming at the technical defects, the invention aims to provide the high-temperature-resistant ceramic coating which has excellent high-temperature resistance and wide application range.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-temperature resistant ceramic coating comprises a component A and a component B in a mass ratio of 1: 1;
the component A comprises the following raw materials in parts by weight:
25-30 parts of modified silane,
1 to 1.5 parts of a leveling agent,
0.3 to 0.5 portion of formic acid,
0.1-0.2 part of potassium hydroxide;
the component B comprises the following raw materials in parts by weight:
50-60 parts of silica sol,
5-10 parts of mica powder,
15-20 parts of silicon micropowder;
10-15 parts of water;
the preparation process of the modified silane comprises the following steps:
firstly, mixing and uniformly stirring 15-20 parts by weight of phthalic anhydride and 180-210 parts by weight of glacial acetic acid, then adding 6-8 parts by weight of allylamine, reacting at room temperature for 1-1.5h, heating to 125 ℃ after refluxing for 3-4h, cooling to room temperature, then adding 200 parts by weight of 170-200 parts by weight of water, heating to boil, keeping for 5-10min, cooling to room temperature, precipitating solids, then carrying out suction filtration and water washing to obtain a product A;
and step two, mixing 10-13 parts of the product A and 150 parts of 110-150 parts of benzene, uniformly stirring, adding 12-15 parts of gamma-aminopropyl methyl dimethoxy silane, heating to 80-85 ℃, reacting for 3-4h, cooling to room temperature, and evaporating to remove benzene to obtain the modified silane.
By adopting the technical scheme, the modified silane is used as a main film forming substance and is closely related to the heat resistance of the coating. Gamma-aminopropyl methyl dimethoxy silane is used as a modified silane matrix, has good bonding performance with inorganic materials, introduces imide rings with excellent thermal stability into a molecular chain after modification, and greatly improves the high temperature resistance of a film layer. Formic acid and potassium hydroxide are used as pH regulator and catalyst. The silica sol is a dispersion liquid of fine silica particles in water, is mixed with mica powder and silica micropowder to be used as an inorganic filler, has good affinity with modified silane, good heat-conducting property and high-temperature resistance, and the prepared coating has excellent hardness and wear resistance.
The invention is further configured to: the component B also comprises 2.5-3.5 parts of graphene.
By adopting the technical scheme, the graphene is a two-dimensional carbon nano material, has excellent optical, electrical and mechanical properties, and can be used as a heat-conducting filler in a ceramic coating system due to excellent heat conductivity and far infrared radiation capability, so that heat transfer loss is reduced.
The invention is further configured to: the component B also comprises 5-7 parts of silicon carbide.
By adopting the technical scheme, the silicon carbide has the characteristics of high hardness, high temperature resistance, heat conduction, corrosion resistance and the like, and is a heat conduction filler with excellent performance, but when the silicon carbide is dispersed in water, the silicon layer is mixed with the water, and a silanol layer is formed on the surface of powder, so that the silicon carbide is difficult to disperse, and the silicon carbide is required to be firstly subjected to acid cleaning and then is dispersed by combining with a surfactant.
The invention is further configured to: the component B also comprises 1-2 parts of dispersant NNF.
By adopting the technical scheme, the dispersant NNF has excellent dispersing performance, can directly act on silicon carbide powder, avoids agglomeration, and is very suitable for graphene and silicon micropowder.
The invention is further configured to: the component A also comprises 3-5 parts of waterborne polyurethane.
By adopting the technical scheme, the waterborne polyurethane is also an environment-friendly pollution-free film forming substance, the modified silane has good compatibility with the waterborne polyurethane, and can be jointly crosslinked to form a film, so that the heat conducting property of the coating is improved.
The invention is further configured to: the silica sol comprises 30-40wt% of silica sol A with the particle size of 5 mu m and 60-70wt% of silica sol B with the particle size of 20-30 mu m.
By adopting the technical scheme, the particles of the silica sol are not easy to agglomerate.
The invention is further configured to: the leveling agent is polydimethylsiloxane.
By adopting the technical scheme, the flatting agent is more suitable for the ceramic coating system, can effectively reduce the surface tension of the coating, and improves the flatting property and uniformity of the coating.
The invention also aims to provide a preparation method of the high-temperature resistant ceramic coating.
A preparation method of a high-temperature resistant ceramic coating comprises the following steps:
(1) preparation of a component A: according to the weight parts required by the formula, firstly, uniformly mixing modified silane and formic acid, standing for 3-5min, then adding potassium hydroxide and a flatting agent, and uniformly stirring to obtain a component A;
(2) b, preparation of a component: firstly, mixing silica sol and water, stirring for 8-10min at the speed of 500-700r/min, then keeping the speed, adding mica powder and silica powder, and stirring for 3-5min at the speed of 900-1000r/min after the addition is finished to obtain a component B;
(3) preparing the coating: and mixing the component A and the component B, and uniformly stirring to obtain the ceramic coating.
In conclusion, the invention has the following beneficial effects:
1. silane is modified, imide ring is introduced, and the modified silane and waterborne polyurethane are compounded to be used as a film forming substance, so that the film layer has excellent high temperature resistance and heat conductivity;
2. the inorganic filler is silicon dioxide, mica powder, silicon micropowder, silicon carbide and graphene, so that the film layer has excellent high-temperature resistance, heat conduction, wear resistance and other properties;
3. the dispersant NNF is selected to help the inorganic filler to be uniformly dispersed, and the comprehensive performance of the film layer is improved.
Drawings
Fig. 1 is a schematic flow chart of the first to third embodiments.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
a high-temperature-resistant ceramic coating comprises a component A and a component B in a mass ratio of 1: 1.
The component A comprises the following raw materials in parts by weight:
25 parts of modified silane;
3 parts of waterborne polyurethane, the trade name of PU7106, purchased from Shanghai Berter New Material science and technology Co., Ltd;
1 part of a leveling agent, wherein the leveling agent is polydimethylsiloxane;
0.3 part of formic acid;
0.1 part of potassium hydroxide.
The component B comprises the following raw materials in parts by weight:
50 parts of silica sol, wherein the silica sol comprises 30wt% of silica sol A with the particle size of 5 micrometers and 70wt% of silica sol B with the particle size of 20 micrometers, the silica sol A and the silica sol B are both alkaline, the pH value is 9.5, and the content of silicon dioxide is 50%;
5 parts of mica powder with the particle size of 50 mu m;
15 parts of silicon micro powder with the particle size of 30 mu m;
2.5 parts of graphene, wherein the single-layer rate is more than 80%, and the sheet diameter D90 is 11-15 mu m;
5 parts of silicon carbide with the particle size of 50 nm;
1 part of NNF dispersant, which is purchased from Guangzhou Rihong chemical industry Co Ltd;
and 10 parts of water.
The preparation process of the modified silane comprises the following steps:
firstly, mixing and uniformly stirring 15 parts by weight of phthalic anhydride and 180 parts by weight of glacial acetic acid, adding 6 parts by weight of allyl amine, reacting for 1 hour at room temperature, heating to 120 ℃, refluxing for 3 hours, cooling to room temperature, adding 170 parts by weight of water, heating to boil, keeping for 5 minutes, cooling to room temperature, separating out a solid, and then carrying out suction filtration and water washing to obtain a product A;
and step two, mixing 10 parts of the product A and 110 parts of benzene, uniformly stirring, adding 12 parts of gamma-aminopropyl methyl dimethoxy silane, heating to 80 ℃, reacting for 3 hours, cooling to room temperature, and evaporating to remove benzene to obtain the modified silane.
A preparation method of a high-temperature resistant ceramic coating is shown in figure 1 and comprises the following steps:
(1) preparation of a component A: according to the weight parts required by the formula, firstly, uniformly mixing modified silane and formic acid, standing for 3min, then adding potassium hydroxide, waterborne polyurethane and a flatting agent, and uniformly stirring to obtain a component A;
(2) b, preparation of a component: firstly, mixing silica sol, water and a dispersant NNF, stirring for 8min at the speed of 500r/min, then keeping the speed, adding mica powder, silicon micropowder, graphene and silicon carbide, and stirring for 3min at the speed of 900r/min after the addition is finished to obtain a component B;
(3) preparing the coating: and mixing and uniformly stirring the component A and the component B to obtain the ceramic coating, and directly spraying, baking at low temperature and curing.
Example two:
a high-temperature-resistant ceramic coating comprises a component A and a component B in a mass ratio of 1: 1.
The component A comprises the following raw materials in parts by weight:
30 parts of modified silane;
5 parts of waterborne polyurethane, the trade name of PU7106, purchased from Shanghai Berter New Material science and technology Co., Ltd;
1.5 parts of a leveling agent, wherein the leveling agent is polydimethylsiloxane;
0.5 part of formic acid;
0.2 part of potassium hydroxide.
The component B comprises the following raw materials in parts by weight:
60 parts of silica sol, wherein the silica sol comprises 40wt% of silica sol A with the particle size of 5 micrometers and 60wt% of silica sol B with the particle size of 30 micrometers, the silica sol A and the silica sol B are both alkaline, the pH value is 9.5, and the content of silicon dioxide is 50%;
10 parts of mica powder with the particle size of 50 mu m;
20 parts of silicon micropowder with the particle size of 30 mu m;
3.5 parts of graphene, wherein the single-layer rate is more than 80%, and the sheet diameter D90 is 11-15 mu m;
7 parts of silicon carbide with the particle size of 50 nm;
2 parts of a dispersant NNF, which is purchased from Guangzhou Rihong chemical industry Co Ltd;
and 15 parts of water.
The preparation process of the modified silane comprises the following steps:
firstly, mixing and uniformly stirring 20 parts by weight of phthalic anhydride and 210 parts by weight of glacial acetic acid, adding 8 parts by weight of allyl amine, reacting at room temperature for 1.5h, heating to 125 ℃, refluxing for 4h, cooling to room temperature, adding 200 parts by weight of water, heating to boil, keeping for 10min, cooling to room temperature, separating out a solid, and then carrying out suction filtration and water washing to obtain a product A;
and step two, mixing 13 parts of the product A and 150 parts of benzene, uniformly stirring, adding 15 parts of gamma-aminopropyl methyl dimethoxysilane, heating to 85 ℃, reacting for 4 hours, cooling to room temperature, and evaporating to remove benzene to obtain the modified silane.
A preparation method of a high-temperature resistant ceramic coating is shown in figure 1 and comprises the following steps:
(1) preparation of a component A: according to the weight parts required by the formula, firstly, uniformly mixing modified silane and formic acid, standing for 5min, then adding potassium hydroxide, waterborne polyurethane and a flatting agent, and uniformly stirring to obtain a component A;
(2) b, preparation of a component: firstly, mixing silica sol, water and a dispersant NNF, stirring for 10min at the speed of 700r/min, then keeping the speed, adding mica powder, silicon micropowder, graphene and silicon carbide, and stirring for 5min at the speed of 1000r/min after the addition is finished to obtain a component B;
(3) preparing the coating: and mixing and uniformly stirring the component A and the component B to obtain the ceramic coating, and directly spraying, baking at low temperature and curing.
Example three:
a high-temperature-resistant ceramic coating comprises a component A and a component B in a mass ratio of 1: 1.
The component A comprises the following raw materials in parts by weight:
28 parts of modified silane;
4 parts of waterborne polyurethane, the trade name of PU7106, purchased from Shanghai Berter New Material science and technology Co., Ltd;
1.2 parts of a leveling agent, wherein the leveling agent is polydimethylsiloxane;
0.4 part of formic acid;
0.15 part of potassium hydroxide.
The component B comprises the following raw materials in parts by weight:
55 parts of silica sol, wherein the silica sol comprises 35wt% of silica sol A with the particle size of 5 micrometers and 65wt% of silica sol B with the particle size of 25 micrometers, the silica sol A and the silica sol B are both alkaline, the pH value is 9.5, and the content of silicon dioxide is 50%;
8 parts of mica powder with the particle size of 50 microns;
18 parts of silicon micro powder with the particle size of 30 mu m;
3 parts of graphene, wherein the single-layer rate is more than 80%, and the sheet diameter D90 is 11-15 mu m;
6 parts of silicon carbide with the particle size of 50 nm;
1.5 parts of dispersant NNF, which is purchased from Guangzhou Rihong chemical industry Co., Ltd;
12 parts of water.
The preparation process of the modified silane comprises the following steps:
firstly, mixing 18 parts by weight of phthalic anhydride and 200 parts by weight of glacial acetic acid, uniformly stirring, adding 7 parts by weight of allyl amine, reacting at room temperature for 1.2h, heating to 122 ℃, refluxing for 3.5h, cooling to room temperature, adding 180 parts by weight of water, heating to boil, keeping for 8min, cooling to room temperature, separating out a solid, and then carrying out suction filtration and water washing to obtain a product A;
and step two, mixing 12 parts of the product A and 130 parts of benzene, uniformly stirring, adding 14 parts of gamma-aminopropyl methyl dimethoxy silane, heating to 82 ℃, reacting for 3.5 hours, cooling to room temperature, and evaporating to remove benzene to obtain the modified silane.
A preparation method of a high-temperature resistant ceramic coating is shown in figure 1 and comprises the following steps:
(1) preparation of a component A: according to the weight parts required by the formula, firstly, uniformly mixing modified silane and formic acid, standing for 4min, then adding potassium hydroxide, waterborne polyurethane and a flatting agent, and uniformly stirring to obtain a component A;
(2) b, preparation of a component: firstly, mixing silica sol, water and a dispersant NNF, stirring for 9min at the speed of 600r/min, then keeping the speed, adding mica powder, silicon micropowder, graphene and silicon carbide, and stirring for 4min at the speed of 950r/min after the addition is finished to obtain a component B;
(3) preparing the coating: and mixing and uniformly stirring the component A and the component B to obtain the ceramic coating, and directly spraying, baking at low temperature and curing.
Example four:
the difference from example three is that the A component does not comprise aqueous polyurethane.
Example five:
the difference from example three is that the B component does not comprise dispersant NNF.
Example six:
the difference from example three is that the B component does not comprise silicon carbide.
Example seven:
the difference from example three is that the B component does not include graphene.
Comparative example one:
the difference from example three is that the modified silane is gamma-aminopropylmethyldimethoxysilane.
Comparative example two:
the difference from example three is that the modified silane is gamma-aminopropylmethyldimethoxysilane and the A component does not comprise the aqueous polyurethane.
Comparative example three:
the difference from example three is that the modified silane is methyltrimethoxysilane.
Testing the performance of the ceramic coating:
the ceramic coatings of the first to third embodiments have hardness of 9H and abrasion resistance of 12000 times after mechanical property tests.
According to the method described in GB/T1735-2009 test for heat resistance of paints and varnishes, the ceramic coatings of examples one to seven and comparative examples one to three were subjected to a heat resistance test at a coating thickness of 20 μm and a temperature of 10 ℃ for 10min each time, and the temperature at which abnormal phenomena such as bubbling, melting, cracking and the like occurred in the appearance of the coating was observed, and the results are shown in Table 1.
The ceramic coatings of examples one to seven and comparative examples one to three were subjected to a thermal conductivity test using a thermal conductivity tester in accordance with the ASTM D5470 standard, and the thermal conductivity of the 20 μm-thick coating film was measured, and the obtained results are reported in table 1.
TABLE 1 ceramic paint Performance test results recording Table
Heat resistance (. degree.C.) Thermal conductivity (W/m K)
Example one 750 8.6
Example two 760 8.2
EXAMPLE III 780 9.3
Example four 800 5.5
EXAMPLE five 640 6.2
EXAMPLE six 750 7.5
EXAMPLE seven 740 7.7
Comparative example 1 520 5.1
Comparative example No. two 530 2.7
Comparative example No. three 480 4.5
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims (4)

1. A high-temperature resistant ceramic coating is characterized in that: comprises a component A and a component B with the mass ratio of 1: 1;
the component A comprises the following raw materials in parts by weight:
25-30 parts of modified silane,
1 to 1.5 parts of a leveling agent,
0.3 to 0.5 portion of formic acid,
0.1-0.2 part of potassium hydroxide;
3-5 parts of waterborne polyurethane;
the component B comprises the following raw materials in parts by weight:
50-60 parts of silica sol,
5-10 parts of mica powder,
15-20 parts of silicon micropowder;
10-15 parts of water;
1-2 parts of a dispersant NNF;
the silica sol comprises 30-40wt% of silica sol A with the particle size of 5 mu m and 60-70wt% of silica sol B with the particle size of 20-30 mu m;
the preparation process of the modified silane comprises the following steps:
firstly, mixing and uniformly stirring 15-20 parts by weight of phthalic anhydride and 180-210 parts by weight of glacial acetic acid, then adding 6-8 parts by weight of allylamine, reacting at room temperature for 1-1.5h, heating to 125 ℃ after refluxing for 3-4h, cooling to room temperature, then adding 200 parts by weight of 170-200 parts by weight of water, heating to boil, keeping for 5-10min, cooling to room temperature, precipitating solids, then carrying out suction filtration and water washing to obtain a product A;
and step two, mixing 10-13 parts of the product A and 150 parts of 110-150 parts of benzene, uniformly stirring, adding 12-15 parts of gamma-aminopropyl methyl dimethoxy silane, heating to 80-85 ℃, reacting for 3-4h, cooling to room temperature, and evaporating to remove benzene to obtain the modified silane.
2. The high temperature resistant ceramic coating of claim 1, wherein: the component B also comprises 2.5-3.5 parts of graphene.
3. The high temperature resistant ceramic coating of claim 1, wherein: the component B also comprises 5-7 parts of silicon carbide.
4. The high temperature resistant ceramic coating of claim 1, wherein: the leveling agent is polydimethylsiloxane.
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CN103725052A (en) * 2014-01-10 2014-04-16 江门四方威凯精细化工有限公司 Water-based porcelain film coating and preparation method thereof
CN106977983A (en) * 2017-04-21 2017-07-25 河北精涂科技有限公司 A kind of normal temperature solidified ceramic coating and preparation method thereof
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