CN117986994B - High-hardness heat-resistant ceramic coating applied to heat-insulating plate and preparation method thereof - Google Patents
High-hardness heat-resistant ceramic coating applied to heat-insulating plate and preparation method thereof Download PDFInfo
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- CN117986994B CN117986994B CN202410397647.6A CN202410397647A CN117986994B CN 117986994 B CN117986994 B CN 117986994B CN 202410397647 A CN202410397647 A CN 202410397647A CN 117986994 B CN117986994 B CN 117986994B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 50
- 238000005524 ceramic coating Methods 0.000 title claims abstract description 31
- 238000002156 mixing Methods 0.000 claims abstract description 73
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000000919 ceramic Substances 0.000 claims abstract description 42
- 239000004005 microsphere Substances 0.000 claims abstract description 42
- 239000004814 polyurethane Substances 0.000 claims abstract description 38
- 229920002635 polyurethane Polymers 0.000 claims abstract description 38
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000839 emulsion Substances 0.000 claims abstract description 30
- 239000002270 dispersing agent Substances 0.000 claims abstract description 29
- 239000012779 reinforcing material Substances 0.000 claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 23
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims abstract description 22
- YJKHMSPWWGBKTN-UHFFFAOYSA-N 2,2,3,3,4,4,5,5,6,6,7,7-dodecafluoroheptyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)F YJKHMSPWWGBKTN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002131 composite material Substances 0.000 claims abstract description 21
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 18
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 18
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 17
- 239000010440 gypsum Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 17
- 239000011527 polyurethane coating Substances 0.000 claims abstract description 13
- 239000012074 organic phase Substances 0.000 claims abstract description 11
- 239000012299 nitrogen atmosphere Substances 0.000 claims abstract description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 10
- 239000010935 stainless steel Substances 0.000 claims abstract description 10
- 238000009777 vacuum freeze-drying Methods 0.000 claims abstract description 10
- 238000009413 insulation Methods 0.000 claims description 38
- NDKYEUQMPZIGFN-UHFFFAOYSA-N Butyl dodecanoate Chemical compound CCCCCCCCCCCC(=O)OCCCC NDKYEUQMPZIGFN-UHFFFAOYSA-N 0.000 claims description 19
- 230000035484 reaction time Effects 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 10
- 229920002873 Polyethylenimine Polymers 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 9
- 238000004321 preservation Methods 0.000 claims 1
- 238000000576 coating method Methods 0.000 abstract description 36
- 239000011248 coating agent Substances 0.000 abstract description 33
- 230000000694 effects Effects 0.000 abstract description 11
- 239000000126 substance Substances 0.000 abstract description 10
- 238000005299 abrasion Methods 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- POULHZVOKOAJMA-UHFFFAOYSA-M dodecanoate Chemical compound CCCCCCCCCCCC([O-])=O POULHZVOKOAJMA-UHFFFAOYSA-M 0.000 abstract 1
- 229940070765 laurate Drugs 0.000 abstract 1
- 239000003973 paint Substances 0.000 description 18
- 239000004793 Polystyrene Substances 0.000 description 14
- 229920002223 polystyrene Polymers 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 235000012239 silicon dioxide Nutrition 0.000 description 6
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000001575 pathological effect Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011214 refractory ceramic Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C09D—COATING 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B80/00—Architectural or constructional elements improving the thermal performance of buildings
- Y02B80/10—Insulation, e.g. vacuum or aerogel insulation
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Abstract
The invention discloses a high-hardness heat-resistant ceramic coating applied to a heat-insulating plate and a preparation method thereof, and relates to the technical field of coatings. The preparation method comprises the following steps: preparing p-phenylenediamine and dodecafluoroheptyl methacrylate, mixing the mixture with polyvinyl alcohol at high temperature under the nitrogen atmosphere, adding tetraethoxysilane, nano-grade gypsum powder and pure water, uniformly mixing, heating the mixture by using a stainless steel reaction kettle, centrifuging the mixture to obtain an organic phase, and performing vacuum freeze drying to obtain a modified reinforced material; preparing silica sol, methyltrimethoxysilane, laurate and water, mixing, and reacting at constant temperature to obtain modified ceramic microspheres; and mixing the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion and the dispersing agent to obtain the composite polyurethane coating. Through the application of the coating, the heat-insulating plate can keep stable in structure in a high-temperature environment, provides a better heat-insulating effect, and has the characteristics of scratch resistance, abrasion resistance and chemical corrosion resistance.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a high-hardness heat-resistant ceramic coating applied to a heat-insulating plate and a preparation method thereof.
Background
In the application of polystyrene (Polystyrene) insulation boards, improving the hardness and temperature resistance thereof is an important technical requirement. To meet this demand, a high hardness refractory ceramic coating may be considered. The polystyrene insulation board has the advantages of good insulation performance, light weight, convenient construction and the like, but the conventional insulation board has the problems of low mechanical strength, temperature resistance limitation, easy surface damage and the like. The polystyrene insulation board has relatively low mechanical strength and is easy to be damaged and compressed and deformed by external force. In some application scenarios, such as building exterior wall insulation systems, the insulation boards need to have a certain compressive and tensile strength to ensure stability and durability of their structure. In addition, in the building construction process, the heat insulation board may be affected by mechanical impact or improper operation, so that the problems of surface dishing, breakage and the like are caused. The high temperature softening and melting properties of polystyrene limit its use in high temperature environments. Under the high temperature condition, the polystyrene heat-insulating plate is easy to soften, deform and even melt, so that the heat-insulating performance of the polystyrene heat-insulating plate is reduced, and even potential safety hazards are caused. Therefore, in some applications where high temperature environments are required, such as insulation and fire protection of industrial equipment, the temperature resistance of polystyrene insulation panels becomes a limiting factor. In addition, the surface of polystyrene insulation boards is susceptible to scratches, abrasion and chemical corrosion, reducing its appearance quality and service life. In the actual use process, the heat-insulating board can be influenced by factors such as sand wind, impact, contact of chemical substances and the like, so that the surface is damaged, faded, corroded and the like. This affects not only the aesthetics of the building appearance, but also the performance and durability of the insulation panels. When using high hardness temperature resistant ceramic coating, attention is paid to the adhesion property of the coating to polystyrene insulation boards. Good coating adhesion can ensure that the coating is not easy to peel or crack in the use process, and the stability of functions and performances of the coating is maintained. Therefore, compatibility and adhesion between the coating and the polystyrene insulation board need to be considered in the coating selection and coating construction process to achieve optimal effect and reliability.
In summary, the high-hardness temperature-resistant ceramic coating is applied to the polystyrene insulation board, so that the hardness and the temperature resistance of the polystyrene insulation board can be improved, and the problems of low mechanical strength, temperature resistance limitation, surface damage and the like of the conventional insulation board are solved. The technical scheme can improve the performance and durability of the heat insulation board, expand the application field of the heat insulation board and provide longer and reliable heat insulation effect. However, in practical application, factors such as cost of the coating, construction process, environmental influence and the like need to be comprehensively considered, and the high-hardness and temperature-resistant ceramic coating suitable for specific requirements is selected.
Disclosure of Invention
The invention aims to provide a high-hardness temperature-resistant ceramic coating applied to a heat-insulating plate and a preparation method thereof, and the preparation method of the high-hardness temperature-resistant ceramic coating can provide the technical effects of improving the performance, the temperature resistance and the durability of the heat-insulating plate. Through the application of the coating, the heat-insulating plate can keep stable in structure in a high-temperature environment, provides a better heat-insulating effect, and has the characteristics of scratch resistance, abrasion resistance and chemical corrosion resistance.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a preparation method of a high-hardness heat-resistant ceramic coating applied to a heat-insulating plate comprises the following steps:
(1) Preparation of modified reinforced material
Preparing p-phenylenediamine and dodecafluoroheptyl methacrylate, mixing the mixture with polyvinyl alcohol at high temperature under the nitrogen atmosphere, adding tetraethoxysilane, nano-grade gypsum powder and pure water, uniformly mixing, heating the mixture by using a stainless steel reaction kettle, centrifuging the mixture to obtain an organic phase, and performing vacuum freeze drying to obtain a modified reinforced material;
(2) Preparation of modified ceramic microspheres
Preparing silica sol, methyltrimethoxysilane, butyl laurate and water, mixing, and reacting at constant temperature to obtain modified ceramic microspheres;
(3) Preparation of composite polyurethane paint
And mixing the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion and the dispersing agent to obtain the composite polyurethane coating.
The high-hardness heat-resistant ceramic coating applied to the heat-insulating plate comprises the following components in mass ratio (5-12) of p-phenylenediamine, dodecafluoroheptyl methacrylate and polyvinyl alcohol: (5-10): (25-32);
the temperature of high-temperature mixing in the step (1) is 75-85 ℃;
The high-temperature mixing time in the step (1) is 3-4 h.
The high-hardness heat-resistant ceramic coating applied to the heat-insulating plate comprises the following components in percentage by mass (12-20): (30-40): (80-100);
the temperature of the heating reaction in the step (1) is 140-180 ℃;
The heating reaction time in the step (1) is 12-16 h.
The high-hardness heat-resistant ceramic coating applied to the heat-insulating plate has the density of silica sol in the step (2) of 1.0-1.2g/cm, the pH value of 2-4 and the viscosity of 1-10 mPa.s.
The mass ratio of silica sol, methyltrimethoxysilane, butyl laurate and water in the step (2) is (30-50): (10-20): (8-12): (120-160);
The temperature of the constant temperature reaction in the step (2) is 68-75 ℃;
The reaction time at constant temperature in the step (2) is 1h-2h.
In the step (3), the mass ratio of the modified reinforcing material to the modified ceramic microspheres to the polyurethane emulsion to the dispersing agent is (12-20): (15-30): (90-110): (12-16).
The high-hardness heat-resistant ceramic coating applied to the heat-insulating plate is prepared from ethoxylated polyethyleneimine as a dispersing agent in the step (3).
The high-hardness heat-resistant ceramic coating applied to the heat-insulating plate has the density of polyurethane emulsion in the step (3) of 1.0-1.2g/cm, the pH value of 7-9, the viscosity of 10-100 mPa s and the solid content of 50%.
The high-hardness heat-resistant ceramic coating applied to the heat-insulating plate is mixed in the step (3) at the temperature of 90-100 ℃;
The mixing time in the step (3) is 1h-3h.
The high-hardness heat-resistant ceramic coating applied to the heat-insulating plate is prepared by the preparation method.
Compared with the prior art, the invention has the beneficial effects that:
In the present invention, p-phenylenediamine, dodecafluoroheptyl methacrylate and polyvinyl alcohol are first prepared, and then mixed at a high temperature under a nitrogen atmosphere. Then adding tetraethoxysilane, nano-level gypsum powder and pure water, and fully and uniformly mixing. The mixture was then heated in a stainless steel reactor. After the completion of the reaction, an organic phase was obtained by centrifugation. Finally, the organic phase is subjected to vacuum freeze drying to obtain the modified reinforced material. Then, raw materials such as silica sol, methyltrimethoxysilane, butyl laurate, water and the like are used in the preparation process. The raw materials are mixed and then subjected to constant temperature reaction, so that the modified ceramic microspheres are obtained. And finally, mixing the raw materials such as the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion, the dispersing agent and the like to prepare the composite polyurethane coating. The preparation method is a key step of the high-hardness heat-resistant ceramic coating applied to the heat-insulating plate. In the preparation process of the coating, the hardness and the temperature resistance of the coating can be enhanced through the introduction of the modified reinforcing material and the modified ceramic microspheres. The preparation of the composite polyurethane coating is to combine the modified reinforcing material and the modified ceramic microspheres with polyurethane emulsion to form a coating with high hardness and temperature resistance. The preparation method of the high-hardness temperature-resistant ceramic coating can provide the technical effects of improving the performance, the temperature resistance and the durability of the heat insulation board. Through the application of the coating, the heat-insulating plate can keep stable in structure in a high-temperature environment, provides a better heat-insulating effect, and has the characteristics of scratch resistance, abrasion resistance and chemical corrosion resistance.
Drawings
FIG. 1 is a practical representation of the product prepared in example 3 of the present invention.
FIG. 2 is a scanning electron microscope image of the product prepared in example 3 of the present invention.
Detailed Description
The technical scheme of the patent is further described in detail below with reference to the specific embodiments.
Table 1 below shows the reagents required for the examples and comparative examples and the corresponding purchasing companies.
Table 1 reagents required for examples and comparative examples and corresponding purchasing companies
Example 1
The preparation method of the high-hardness temperature-resistant ceramic coating applied to the heat insulation board comprises the following steps:
(1) Preparation of modified reinforced material
Preparing p-phenylenediamine and dodecafluoroheptyl methacrylate, mixing the mixture with polyvinyl alcohol at high temperature under the nitrogen atmosphere, adding tetraethoxysilane, nano-grade gypsum powder and pure water, uniformly mixing, heating the mixture by using a stainless steel reaction kettle, centrifuging the mixture to obtain an organic phase, and performing vacuum freeze drying to obtain a modified reinforced material;
The dosages of p-phenylenediamine, dodecafluoroheptyl methacrylate and polyvinyl alcohol in the step (1) are 5kg, 10kg and 25kg respectively;
The temperature of the high-temperature mixing in the step (1) is 75 ℃;
The high-temperature mixing time in the step (1) is 4 hours.
Meanwhile, the dosage of the ethyl orthosilicate, the nano-scale gypsum powder and the pure water in the step (1) is respectively 12kg, 40kg and 80kg;
the temperature of the heating reaction in the step (1) is 140 ℃;
the heating reaction time in the step (1) is 16h.
(2) Preparation of modified ceramic microspheres
Preparing silica sol, methyltrimethoxysilane, butyl laurate and water, mixing, and reacting at constant temperature to obtain modified ceramic microspheres;
The silica sol in step (2) had a density of 1.0g/cm and a pH of 4 and a viscosity of 1 mPa.s.
The dosage of silica sol, methyltrimethoxysilane, butyl laurate and water in the step (2) is 30kg, 20kg, 8kg and 160kg respectively;
The temperature of the constant temperature reaction in the step (2) is 68 ℃;
The reaction time at constant temperature in the step (2) is 2h.
(3) Preparation of composite polyurethane paint
And mixing the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion and the dispersing agent to obtain the composite polyurethane coating.
The dosage of the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion and the dispersing agent in the step (3) is respectively 12kg, 30kg, 90kg and 16kg.
The dispersant in the step (3) is ethoxylated polyethyleneimine.
The polyurethane emulsion in the step (3) has a density of 1.0g/cm, a pH of 9, a viscosity of 10 mPas and a solids content of 50%.
The temperature of the mixing in the step (3) is 90 ℃;
the mixing time in step (3) was 3h.
Example 2
The preparation method of the high-hardness temperature-resistant ceramic coating applied to the heat insulation board comprises the following steps:
(1) Preparation of modified reinforced material
Preparing p-phenylenediamine and dodecafluoroheptyl methacrylate, mixing the mixture with polyvinyl alcohol at high temperature under the nitrogen atmosphere, adding tetraethoxysilane, nano-grade gypsum powder and pure water, uniformly mixing, heating the mixture by using a stainless steel reaction kettle, centrifuging the mixture to obtain an organic phase, and performing vacuum freeze drying to obtain a modified reinforced material;
the dosages of the p-phenylenediamine, the dodecafluoroheptyl methacrylate and the polyvinyl alcohol in the step (1) are respectively 12kg, 5kg and 32kg;
the temperature of high-temperature mixing in the step (1) is 85 ℃;
The high-temperature mixing time in the step (1) is 3 hours.
Meanwhile, the dosage of the ethyl orthosilicate, the nano-scale gypsum powder and the pure water in the step (1) is respectively 20kg, 30kg and 100kg;
the temperature of the heating reaction in the step (1) is 180 ℃;
the heating reaction time in the step (1) is 12 hours.
(2) Preparation of modified ceramic microspheres
Preparing silica sol, methyltrimethoxysilane, butyl laurate and water, mixing, and reacting at constant temperature to obtain modified ceramic microspheres;
the silica sol in the step (2) had a density of 1.2g/cm, a pH of 2 and a viscosity of 10 mPas.
The dosage of the silica sol, the methyltrimethoxysilane, the butyl laurate and the water in the step (2) is respectively 50kg, 10kg, 12kg and 120kg;
the temperature of the constant temperature reaction in the step (2) is 75 ℃;
The reaction time at constant temperature in the step (2) is 1h.
(3) Preparation of composite polyurethane paint
And mixing the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion and the dispersing agent to obtain the composite polyurethane coating.
The dosages of the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion and the dispersing agent in the step (3) are respectively 20kg, 15kg, 110kg and 12kg.
The dispersant in the step (3) is ethoxylated polyethyleneimine.
The density of the polyurethane emulsion in the step (3) is-1.2 g/cm, the pH value is 7, the viscosity is 100 mPa.s, and the solid content is 50%.
The temperature of the mixing in the step (3) is 100 ℃;
the mixing time in step (3) was 1h.
Example 3
The preparation method of the high-hardness temperature-resistant ceramic coating applied to the heat insulation board comprises the following steps:
(1) Preparation of modified reinforced material
Preparing p-phenylenediamine and dodecafluoroheptyl methacrylate, mixing the mixture with polyvinyl alcohol at high temperature under the nitrogen atmosphere, adding tetraethoxysilane, nano-grade gypsum powder and pure water, uniformly mixing, heating the mixture by using a stainless steel reaction kettle, centrifuging the mixture to obtain an organic phase, and performing vacuum freeze drying to obtain a modified reinforced material;
The dosages of the p-phenylenediamine, the dodecafluoroheptyl methacrylate and the polyvinyl alcohol in the step (1) are respectively 10kg, 8kg and 28kg;
the temperature of high-temperature mixing in the step (1) is 80 ℃;
the time of high-temperature mixing in the step (1) is 3.5h.
Meanwhile, the dosage of the ethyl orthosilicate, the nano-scale gypsum powder and the pure water in the step (1) is 18kg, 35kg and 90kg respectively;
The temperature of the heating reaction in the step (1) is 160 ℃;
the heating reaction time in the step (1) is 14h.
(2) Preparation of modified ceramic microspheres
Preparing silica sol, methyltrimethoxysilane, butyl laurate and water, mixing, and reacting at constant temperature to obtain modified ceramic microspheres;
The silica sol in the step (2) had a density of 1.2g/cm, a pH of 3 and a viscosity of 5 mPas.
The dosage of the silica sol, the methyltrimethoxysilane, the butyl laurate and the water in the step (2) is 35kg, 15kg, 10kg and 140kg respectively;
the temperature of the constant temperature reaction in the step (2) is 72 ℃;
The reaction time at constant temperature in the step (2) is 1.5h.
(3) Preparation of composite polyurethane paint
And mixing the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion and the dispersing agent to obtain the composite polyurethane coating.
The dosages of the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion and the dispersing agent in the step (3) are 16kg, 22kg, 100kg and 14kg respectively.
The dispersant in the step (3) is ethoxylated polyethyleneimine.
The density of the polyurethane emulsion in the step (3) is 1.0g/cm, the pH value is 8, the viscosity is 50 mPa.s, and the solid content is 50%.
The temperature of the mixing in the step (3) is 95 ℃;
The mixing time in step (3) was 2h.
Comparative example 1
The preparation method of the high-hardness temperature-resistant ceramic coating applied to the heat insulation board comprises the following steps:
(1) Preparation of modified reinforced material
Preparing ethylenediamine and dodecafluoroheptyl methacrylate, mixing with polyvinyl alcohol at high temperature under nitrogen atmosphere, adding tetraethoxysilane, nano-grade gypsum powder and pure water, uniformly mixing, heating by using a stainless steel reaction kettle, centrifuging, taking an organic phase, and performing vacuum freeze drying to obtain a modified reinforced material;
the dosages of ethylenediamine, dodecafluoroheptyl methacrylate and polyvinyl alcohol in the step (1) are respectively 10kg, 8kg and 28kg;
the temperature of high-temperature mixing in the step (1) is 80 ℃;
the time of high-temperature mixing in the step (1) is 3.5h.
Meanwhile, the dosage of the ethyl orthosilicate, the nano-scale gypsum powder and the pure water in the step (1) is 18kg, 35kg and 90kg respectively;
The temperature of the heating reaction in the step (1) is 160 ℃;
the heating reaction time in the step (1) is 14h.
(2) Preparation of modified ceramic microspheres
Preparing silica sol, methyltrimethoxysilane, butyl laurate and water, mixing, and reacting at constant temperature to obtain modified ceramic microspheres;
The silica sol in the step (2) had a density of 1.2g/cm, a pH of 3 and a viscosity of 5 mPas.
The dosage of the silica sol, the methyltrimethoxysilane, the butyl laurate and the water in the step (2) is 35kg, 15kg, 10kg and 140kg respectively;
the temperature of the constant temperature reaction in the step (2) is 72 ℃;
The reaction time at constant temperature in the step (2) is 1.5h.
(3) Preparation of composite polyurethane paint
And mixing the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion and the dispersing agent to obtain the composite polyurethane coating.
The dosages of the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion and the dispersing agent in the step (3) are 16kg, 22kg, 100kg and 14kg respectively.
The dispersant in the step (3) is ethoxylated polyethyleneimine.
The density of the polyurethane emulsion in the step (3) is 1.0g/cm, the pH value is 8, the viscosity is 50 mPa.s, and the solid content is 50%.
The temperature of the mixing in the step (3) is 95 ℃;
The mixing time in step (3) was 2h.
Comparative example 2
The preparation method of the high-hardness temperature-resistant ceramic coating applied to the heat insulation board comprises the following steps:
(1) Preparation of modified reinforced material
Preparing p-phenylenediamine and methacrylate, mixing the mixture with polyvinyl alcohol at high temperature under the nitrogen atmosphere, adding tetraethoxysilane, nano-grade gypsum powder and pure water, uniformly mixing, heating the mixture by using a stainless steel reaction kettle, centrifuging to obtain an organic phase, and performing vacuum freeze drying to obtain a modified reinforced material;
The dosages of the p-phenylenediamine, the methacrylate and the polyvinyl alcohol in the step (1) are respectively 10kg, 8kg and 28kg;
the temperature of high-temperature mixing in the step (1) is 80 ℃;
the time of high-temperature mixing in the step (1) is 3.5h.
Meanwhile, the dosage of the ethyl orthosilicate, the nano-scale gypsum powder and the pure water in the step (1) is 18kg, 35kg and 90kg respectively;
The temperature of the heating reaction in the step (1) is 160 ℃;
the heating reaction time in the step (1) is 14h.
(2) Preparation of modified ceramic microspheres
Preparing silica sol, methyltrimethoxysilane, butyl laurate and water, mixing, and reacting at constant temperature to obtain modified ceramic microspheres;
The silica sol in the step (2) had a density of 1.2g/cm, a pH of 3 and a viscosity of 5 mPas.
The dosage of the silica sol, the methyltrimethoxysilane, the butyl laurate and the water in the step (2) is 35kg, 15kg, 10kg and 140kg respectively;
the temperature of the constant temperature reaction in the step (2) is 72 ℃;
The reaction time at constant temperature in the step (2) is 1.5h.
(3) Preparation of composite polyurethane paint
And mixing the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion and the dispersing agent to obtain the composite polyurethane coating.
The dosages of the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion and the dispersing agent in the step (3) are 16kg, 22kg, 100kg and 14kg respectively.
The dispersant in the step (3) is ethoxylated polyethyleneimine.
The density of the polyurethane emulsion in the step (3) is 1.0g/cm, the pH value is 8, the viscosity is 50 mPa.s, and the solid content is 50%.
The temperature of the mixing in the step (3) is 95 ℃;
The mixing time in step (3) was 2h.
Comparative example 3
The preparation method of the high-hardness temperature-resistant ceramic coating applied to the heat insulation board comprises the following steps:
(1) Preparation of modified reinforced material
Preparing p-phenylenediamine and dodecafluoroheptyl methacrylate, mixing the mixture with polyvinyl alcohol at high temperature under the nitrogen atmosphere, adding nano-grade gypsum powder and pure water, uniformly mixing, heating the mixture by using a stainless steel reaction kettle, centrifuging to obtain an organic phase, and performing vacuum freeze drying to obtain a modified reinforced material;
The dosages of the p-phenylenediamine, the dodecafluoroheptyl methacrylate and the polyvinyl alcohol in the step (1) are respectively 10kg, 8kg and 28kg;
the temperature of high-temperature mixing in the step (1) is 80 ℃;
the time of high-temperature mixing in the step (1) is 3.5h.
Meanwhile, the dosage of the nano-level gypsum powder and the pure water in the step (1) is 35kg and 90kg respectively;
The temperature of the heating reaction in the step (1) is 160 ℃;
the heating reaction time in the step (1) is 14h.
(2) Preparation of modified ceramic microspheres
Preparing silica sol, methyltrimethoxysilane, butyl laurate and water, mixing, and reacting at constant temperature to obtain modified ceramic microspheres;
The silica sol in the step (2) had a density of 1.2g/cm, a pH of 3 and a viscosity of 5 mPas.
The dosage of the silica sol, the methyltrimethoxysilane, the butyl laurate and the water in the step (2) is 35kg, 15kg, 10kg and 140kg respectively;
the temperature of the constant temperature reaction in the step (2) is 72 ℃;
The reaction time at constant temperature in the step (2) is 1.5h.
(3) Preparation of composite polyurethane paint
And mixing the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion and the dispersing agent to obtain the composite polyurethane coating.
The dosages of the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion and the dispersing agent in the step (3) are 16kg, 22kg, 100kg and 14kg respectively.
The dispersant in the step (3) is ethoxylated polyethyleneimine.
The density of the polyurethane emulsion in the step (3) is 1.0g/cm, the pH value is 8, the viscosity is 50 mPa.s, and the solid content is 50%.
The temperature of the mixing in the step (3) is 95 ℃;
The mixing time in step (3) was 2h.
Comparative example 4
The preparation method of the high-hardness temperature-resistant ceramic coating applied to the heat insulation board comprises the following steps:
(1) Preparation of reinforcing materials
The dodecafluoroheptyl methacrylate is prepared.
(2) Preparation of modified ceramic microspheres
Preparing silica sol, methyltrimethoxysilane, butyl laurate and water, mixing, and reacting at constant temperature to obtain modified ceramic microspheres;
The silica sol in the step (2) had a density of 1.2g/cm, a pH of 3 and a viscosity of 5 mPas.
The dosage of the silica sol, the methyltrimethoxysilane, the butyl laurate and the water in the step (2) is 35kg, 15kg, 10kg and 140kg respectively;
the temperature of the constant temperature reaction in the step (2) is 72 ℃;
The reaction time at constant temperature in the step (2) is 1.5h.
(3) Preparation of composite polyurethane paint
And mixing the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion and the dispersing agent to obtain the composite polyurethane coating.
The dosages of the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion and the dispersing agent in the step (3) are 16kg, 22kg, 100kg and 14kg respectively.
The dispersant in the step (3) is ethoxylated polyethyleneimine.
The density of the polyurethane emulsion in the step (3) is 1.0g/cm, the pH value is 8, the viscosity is 50 mPa.s, and the solid content is 50%.
The temperature of the mixing in the step (3) is 95 ℃;
The mixing time in step (3) was 2h.
Test case
The test protocol was as follows: the prepared coating is uniformly smeared on each side surface of the heat insulation board, the thickness of the coating is 0.8mm, and the heat insulation board is used for subsequent tests after being dried at 80 ℃.
The temperature resistance measurement is carried out by referring to national standard GB/T1735-79 (89) paint film heat resistance measurement method. And placing the carbon fiber plate in a muffle furnace, gradually increasing the temperature in the furnace, observing whether the coating has cracking, peeling, color change and other pathological phenomena until the coating has any pathological phenomenon, and recording the temperature at the moment.
Distilled water was selected as the test solution for measuring the water resistance. The filter paper was stacked in the middle of the test, ensuring that the filter paper was wet during the test. After the test is completed, the filter paper is taken down, the surface layer of the coating film is wiped off, and the coating film is placed for 2 hours for observation. Observing whether the paint film has pathological phenomena such as color change, falling off, foaming, cracking and the like. The measurement results were evaluated in accordance with GB/T1766.
In addition, hardness measurement is carried out by adopting the rule of national standard GB/T6739-2006 "measurement of paint film hardness by the method of colored paint and varnish Pencil". The pencil uses the Chinese card 101 to draw the pencil.
The test insulation board is a green polystyrene insulation board, and is purchased from Nanjing green insulation materials limited company, and the parameters are as follows: 60cm long, 40cm wide, 15cm thick, density: 30 kg/mW, coefficient of thermal conductivity: 0.045 W/(m·k), compressive strength: 0.1MPa, flexural strength: 0.2MPa, water absorption: 3%.
Table 2 test results
As seen in Table 2, comparative example 1 lacks ethylenediamine and its presence has an effect on the hardness, heat resistance and water resistance of the coating, relative to example 3, which has better properties. In terms of hardness, p-phenylenediamine can introduce a crosslinked structure into the modified reinforced material, so that the hardness and strength of the coating are improved. The crosslinked structure can lead the coating to have better wear resistance and scratch resistance, and improve the hardness and durability of the coating. In terms of heat resistance, the introduction of p-phenylenediamine can increase the high temperature resistance of the coating. It can form stable chemical structure in material and provide certain heat-resisting protection. The paint applied to the heat insulation board can keep stable in a high-temperature environment and is not easy to deform or crack. In terms of water resistance, p-phenylenediamine can improve the water resistance of the coating. It can react with other components to form chemical structure with excellent water resistance, and this can reduce the erosion and damage of water to paint. This is particularly important for insulation board coatings, as the insulation board needs to have a certain moisture resistance to maintain its insulation effect. Comparative example 2 lack of dodecafluoroheptyl methacrylate, the incorporation of dodecafluoroheptyl methacrylate can increase the hardness of the coating. It can form cross-linked structure in the modified reinforced material to raise the strength and wear resistance of the paint and thus raise the hardness of the paint. In terms of heat resistance, the presence of dodecafluoroheptyl methacrylate can improve the high temperature resistance of the coating. The coating has higher thermal stability, can keep the stability of the coating in a high-temperature environment, and reduces the possibility of thermal decomposition and degradation. In terms of water resistance, dodecafluoroheptyl methacrylate can also improve the water resistance of the coating. It has low surface energy and good hydrophilicity, and can form a layer of film with waterproof effect on the surface of the paint, so as to reduce the penetration and erosion of water. Comparative example 3 lacks ethyl orthosilicate, which plays an important role in the preparation process of the modified reinforcing material, and it can improve the hardness, heat resistance and water resistance of the modified reinforcing material. Hardness: the ethyl orthosilicate can improve the hardness of the modified reinforced material. This is because tetraethyl orthosilicate undergoes hydrolysis at high temperatures to produce silicic acid and ethanol. Silicic acid is a high-hardness substance that can increase the hardness of the modified reinforcing material. Heat resistance: the heat resistance of the modified reinforcing material can be improved by the tetraethoxysilane. This is because tetraethyl orthosilicate undergoes hydrolysis at high temperatures to produce silicic acid and ethanol. Silicic acid is a substance resistant to high temperatures, which can improve the heat resistance of the modified reinforcing material. Water resistance: the water resistance of the modified reinforced material can be improved by the tetraethoxysilane. This is because tetraethyl orthosilicate undergoes hydrolysis at high temperatures to produce silicic acid and ethanol. Silicic acid is a water-resistant substance which can improve the water resistance of the modified reinforcing material. Comparative example 4 lacks reinforcement material and, in combination with the above comparative examples, is seen to have the worst overall properties.
Taking the product prepared in example 3 as an example, as shown in fig. 1, the prepared coating is smeared on a heat insulation board to show the effect. Meanwhile, as shown in fig. 2, the scanning electron microscope image shows that the paint is uniformly mixed, good in dispersibility and uniform in coating surface layer.
While the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes may be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (4)
1. A preparation method of a high-hardness heat-resistant ceramic coating applied to a heat-insulating plate is characterized by comprising the following steps:
the method comprises the following steps:
(1) Preparation of modified reinforced material:
Preparing p-phenylenediamine and dodecafluoroheptyl methacrylate, mixing the mixture with polyvinyl alcohol at high temperature under the nitrogen atmosphere, adding tetraethoxysilane, nano-grade gypsum powder and pure water, uniformly mixing, heating the mixture by using a stainless steel reaction kettle, centrifuging the mixture to obtain an organic phase, and performing vacuum freeze drying to obtain a modified reinforced material;
In the step (1), the mass ratio of the p-phenylenediamine to the dodecafluoroheptyl methacrylate to the polyvinyl alcohol is (5-12): (5-10): (25-32);
the temperature of high-temperature mixing in the step (1) is 75-85 ℃;
The high-temperature mixing time in the step (1) is 3-4 h;
In the step (1), the mass ratio of the tetraethoxysilane to the nano-scale gypsum powder to the pure water is (12-20): (30-40): (80-100);
the temperature of the heating reaction in the step (1) is 140-180 ℃;
The heating reaction time in the step (1) is 12-16 h;
(2) Preparing modified ceramic microspheres:
Preparing silica sol, methyltrimethoxysilane, butyl laurate and water, mixing, and reacting at constant temperature to obtain modified ceramic microspheres;
The density of the silica sol in the step (2) is 1.0-1.2g/cm, the pH value is 2-4, and the viscosity is 1-10 mPa.s;
in the step (2), the mass ratio of the silica sol to the methyltrimethoxysilane to the butyl laurate to the water is (30-50): (10-20): (8-12): (120-160);
The temperature of the constant temperature reaction in the step (2) is 68-75 ℃;
The constant temperature reaction time in the step (2) is 1h-2h;
(3) Preparation of the composite polyurethane coating:
Mixing the modified reinforcing material, the modified ceramic microspheres, the polyurethane emulsion and the dispersing agent to obtain a composite polyurethane coating;
The density of the polyurethane emulsion in the step (3) is 1.0-1.2g/cm, the pH value is 7-9, the viscosity is 10-100 mPa s, and the solid content is 50%;
in the step (3), the mass ratio of the modified reinforcing material to the modified ceramic microspheres to the polyurethane emulsion to the dispersing agent is (12-20): (15-30): (90-110): (12-16).
2. The method for preparing the high-hardness and temperature-resistant ceramic coating applied to the heat insulation board according to claim 1, which is characterized in that:
The dispersant in the step (3) is ethoxylated polyethyleneimine.
3. The method for preparing the high-hardness heat-resistant ceramic coating applied to the heat preservation plate as claimed in claim 2, wherein the method comprises the following steps:
the temperature of the mixing in the step (3) is 90-100 ℃;
The mixing time in the step (3) is 1h-3h.
4. The utility model provides a high hardness temperature resistant ceramic coating of heated board, its characterized in that: prepared by the preparation method of any one of claims 1-3.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05179034A (en) * | 1991-11-28 | 1993-07-20 | Japan Synthetic Rubber Co Ltd | Method for surface treatment of base material |
| CN104497852A (en) * | 2014-12-15 | 2015-04-08 | 广西科技大学 | Preparation methods of superhydrophobic methyltrimethoxysilane/ZnO composite sol and composite coating |
| CN105176318A (en) * | 2015-10-28 | 2015-12-23 | 苏州赛斯德工程设备有限公司 | Environmentally-friendly water-based paint and preparation method thereof |
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| US7879449B2 (en) * | 2006-03-14 | 2011-02-01 | Cerasol Hong Kong Ltd. | Non-stick ceramic coating composition and process |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05179034A (en) * | 1991-11-28 | 1993-07-20 | Japan Synthetic Rubber Co Ltd | Method for surface treatment of base material |
| CN104497852A (en) * | 2014-12-15 | 2015-04-08 | 广西科技大学 | Preparation methods of superhydrophobic methyltrimethoxysilane/ZnO composite sol and composite coating |
| CN105176318A (en) * | 2015-10-28 | 2015-12-23 | 苏州赛斯德工程设备有限公司 | Environmentally-friendly water-based paint and preparation method thereof |
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