CN108034354B - Nano ceramic coating for resisting high temperature of 800 ℃ and preparation process thereof - Google Patents
Nano ceramic coating for resisting high temperature of 800 ℃ and preparation process thereof Download PDFInfo
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- CN108034354B CN108034354B CN201711337785.1A CN201711337785A CN108034354B CN 108034354 B CN108034354 B CN 108034354B CN 201711337785 A CN201711337785 A CN 201711337785A CN 108034354 B CN108034354 B CN 108034354B
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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
- C09D183/00—Coating 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
- C09D183/04—Polysiloxanes
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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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2244—Oxides; Hydroxides of metals of zirconium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- 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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Abstract
The invention provides a nano ceramic coating for resisting high temperature of 800 ℃, which is prepared from the following raw materials in parts by weight: siloxane: 32-40 parts of polyvinyl butyral liquid: 12-22 parts of inorganic pigment: 10-18 parts of filler: 16-32 parts of dispersant: 0.5-1.4 parts of leveling agent: 0.2-1 part, solvent: 3-6 parts. The nano ceramic coating for resisting the high temperature of 800 ℃ is a single-component coating, does not need the complex rolling curing process of the traditional ceramic coating, and can ensure the integrity of the performance of the coating.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a nano ceramic coating for resisting 800 ℃ high temperature, and also relates to a preparation process of the coating.
Background
With the development of modern science and technology, the requirements of a plurality of industries (such as high-temperature smelting kilns, hearths, rotary kilns, heat exchangers, smoke exhaust pipelines and other equipment outer surface protection in industries such as petroleum and petrochemical industry, natural gas industry, metallurgy industry, mines and the like) on operation in a high-temperature environment are higher and higher, and the requirements on the performance of a high-temperature resistant protective coating are also higher and higher. At present, the organosilicon high-temperature resistant coating is mainly used in the market, contains a large amount of organic volatile compounds (VOC), has great harm to the environment, and starts to decompose and carbonize at 600 ℃, is easy to combust and smoke at high temperature, and generates toxic gas.
The inorganic nano ceramic coating has the characteristics of environmental protection, no combustion, no smoke and no toxic gas release at high temperature, can meet the performance of instant high temperature resistance, and is gradually applied to the high temperature industry in recent years.
Disclosure of Invention
The invention provides a nano ceramic coating for resisting high temperature of 800 ℃, which can be self-cured at normal temperature and solves the problem that the ceramic coating needs to be baked and cured at high temperature.
The nano ceramic coating for resisting the high temperature of 800 ℃ is prepared from the following raw materials in parts by weight:
siloxane: 32 to 40 portions of
Polyvinyl butyral liquid: 12 to 22 portions of
Inorganic pigment: 10 to 18 portions of
Filling: 16-32 parts of
Dispersing agent: 0.5 to 1.4 portions of
Leveling agent: 0.2 to 1 portion
Solvent: 3-6 parts.
Further, the solvent is at least one of absolute ethyl alcohol, isopropanol and n-butanol.
Further, the siloxane is at least one of methyltrimethoxysilane, methyltriethoxysilane and dimethyldimethoxysilane.
Further, isopropanol or n-butanol is selected as a solvent of the polyvinyl butyral liquid, and the solid content is 10%.
Further, the filler contains a high melting point glass frit having a melting point of 750 ℃.
Further, the filler contains potassium titanate whiskers, mica powder, wollastonite, alumina fibers, zirconia and yttria.
Further, the inorganic pigment is at least one of titanium dioxide, copper chromium black, cobalt blue and titanium yellow.
Further, the nano ceramic coating for resisting the high temperature of 800 ℃ consists of the following raw materials in parts by weight:
siloxane: 38 portions of
Polyvinyl butyral liquid: 20 portions of
Copper chromium black: 15 portions of
Dispersing agent: 0.7 portion of
Leveling agent: 0.3 part
Potassium titanate whisker: 3 portions of
Mica powder: 5 portions of
Wollastonite: 5 portions of
High-melting-point glass powder: 5.5 parts of
Alumina fiber: 3 portions of
Zirconium oxide: 3 portions of
Yttrium oxide: 3 portions of
Solvent: 5 portions of
The preparation process of the nano ceramic coating for resisting the high temperature of 800 ℃ comprises the steps of sequentially adding polyvinyl butyral liquid, a dispersing agent, a flatting agent and a solvent into a sand mill according to a ratio, uniformly stirring, adding an inorganic pigment and a filler, grinding to the fineness of 30 mu m, passing through a 160-mesh double-layer screen, calculating the yield, adding siloxane into the mixture by stirring with a high-speed stirrer at the rotating speed of 500r/min, and stirring for 15-20min to obtain the nano ceramic coating for resisting the high temperature of 800 ℃.
The nano ceramic coating for resisting the high temperature of 800 ℃ has the following beneficial effects:
(1) the nano ceramic coating for resisting the high temperature of 800 ℃ is a single-component coating, does not need the complex rolling curing process of the traditional ceramic coating, and can ensure the integrity of the performance of the coating. The coating can be self-cured at normal temperature, the polyvinyl butyral liquid is selected to change the thixotropy of the coating, stabilize the dustproof storage function of the coating, and simultaneously can replace siloxane to form a film at normal temperature, play a transition role, and solve the problem that the ceramic coating needs to be baked and cured at high temperature.
(2) The nano ceramic coating filler for resisting the high temperature of 800 ℃ contains high-melting-point glass powder, and the high-melting-point glass powder can be melted for the second time at the temperature of 750 ℃ and is filled into gaps of a coating, so that the coating forms a film for the third time, and the density of the coating at the high temperature is improved.
(3) The nano ceramic coating filler for resisting the high temperature of 800 ℃ consists of potassium titanate whiskers, mica powder, wollastonite, alumina fiber, zirconia and yttrium oxide, wherein the potassium titanate whiskers can be grafted with siloxane, the mechanical property of the coating is improved, the flexibility of the coating is enhanced when the film thickness is larger, the zirconia can effectively absorb the energy required by crack initiation and expansion of the coating at the high temperature, the alumina fiber can be arranged in a coating three-dimensional grid in a mutually staggered mode due to a short rod-shaped structure of the alumina fiber to serve as a reinforcement, and the combination of the three components greatly meets the anti-deflection performance of the coating at normal temperature and high temperature and meets the thermal stability. The wollastonite has a needle-shaped or fibrous structure, so that the crack sensitivity can be reduced, the metal corrosion resistance can be improved, and the corrosion resistance and the scrubbing resistance can be effectively improved by matching with the mica powder with a lamellar structure. The yttrium oxide has certain improvement on the high-temperature thermal stability and the corrosion resistance of the coating due to the special valence electron structure. The invention adopts special pigment and filler for compounding, solves the problem of cracks generated by the inconsistency of the thermal expansion coefficient of the coating with the base material in a high-temperature environment, improves the high-temperature flexibility resistance of the coating, enables the coating to have the cold and hot alternate impact resistance at high temperature, and meets the use requirements of high-temperature equipment devices in outdoor rain, snow and other environments. Meanwhile, the added yttrium oxide can refine material grains and eliminate crystal boundary impurities, and the combination of a plurality of fillers improves the comprehensive performance of the whole nano ceramic coating.
(4) The invention selects titanium dioxide, copper chromium black, cobalt blue and titanium yellow pigment preferably, has good high temperature stability, and meets the application stability of the nano ceramic coating for resisting 800 ℃ high temperature on outdoor high temperature resistant devices.
(5) According to the preparation process of the nano ceramic coating for resisting the high temperature of 800 ℃, siloxane is added and uniformly mixed in a stirring state after the nano ceramic coating is ground to the specified fineness, and the storage stability of the nano ceramic coating is deteriorated due to the change of the temperature and the pH value of the siloxane in the grinding process.
Detailed Description
Based on the design idea of the present invention, the following will describe in detail a nano ceramic coating for resisting high temperature of 800 ℃ according to the present invention with specific examples:
examples 1 to 3
The weight composition of the raw materials of the nano ceramic coating for resisting the high temperature of 800 ℃ is shown as the following table:
the nano ceramic coating for resisting the high temperature of 800 ℃ in the embodiments 1 to 3 is prepared by the following method:
adding siloxane, polyvinyl butyral liquid, a dispersing agent, a leveling agent and isopropanol into a sand mill in sequence according to a proportion, adding copper chromium black, high-melting-point glass powder with a melting point of 750 ℃, potassium titanate whisker, mica powder, wollastonite, alumina fiber, zirconia and yttrium oxide after uniformly stirring, grinding to the fineness of 30 mu m, passing through a 160-mesh double-layer screen, calculating the yield, adding siloxane under stirring by a high-speed stirrer at a rotating speed of 500r/min, and stirring for 20min to obtain the 800 ℃ high-temperature-resistant nano ceramic coating.
The nano ceramic coating for resisting the high temperature of 800 ℃ prepared in the examples 1 to 3 is subjected to performance test, and the detection results are shown in the following table:
Claims (6)
1. the nano ceramic coating for resisting the high temperature of 800 ℃ is characterized by comprising the following raw materials in parts by weight:
siloxane: 32 to 40 portions of
Polyvinyl butyral liquid: 12 to 22 portions of
Inorganic pigment: 10 to 18 portions of
Filling: 16-32 parts of
Dispersing agent: 0.5 to 1.4 portions of
Leveling agent: 0.2 to 1 portion
Solvent: 3-6 parts;
the polyvinyl butyral liquid adopts isopropanol or n-butanol as a solvent, and the solid content is 10%;
the filler contains high-melting-point glass powder with a melting point of 750 ℃, potassium titanate whiskers, mica powder, wollastonite, alumina fibers, zirconia and yttria.
2. The nano ceramic coating for resisting high temperature of 800 ℃ according to claim 1, wherein the solvent is at least one of absolute ethyl alcohol, isopropyl alcohol and n-butyl alcohol.
3. The nano ceramic coating for resisting high temperature of 800 ℃ according to claim 1, wherein the siloxane is at least one of methyltrimethoxysilane, methyltriethoxysilane and dimethyldimethoxysilane.
4. The nano ceramic coating for resisting the high temperature of 800 ℃ according to claim 1, wherein the inorganic pigment is at least one of titanium dioxide, copper chromium black, cobalt blue and titanium yellow.
5. The nano ceramic coating for resisting the high temperature of 800 ℃ according to claim 4, which is prepared from the following raw materials in parts by weight:
siloxane: 38 portions of
Polyvinyl butyral liquid: 20 portions of
Copper chromium black: 15 portions of
Dispersing agent: 0.7 portion of
Leveling agent: 0.3 part
Potassium titanate whisker: 3 portions of
Mica powder: 5 portions of
Wollastonite: 5 portions of
High-melting-point glass powder: 5.5 parts of
Alumina fiber: 3 portions of
Zirconium oxide: 3 portions of
Yttrium oxide: 3 portions of
Solvent: 5 parts of the raw materials.
6. A preparation process of the 800 ℃ high temperature resistant nano ceramic coating as claimed in any one of claims 1 to 5, characterized in that polyvinyl butyral liquid, a dispersant, a leveling agent and a solvent are sequentially added into a sand mill according to a proportion, inorganic pigment and filler are added after uniform stirring, when the fineness is 30 μm, the mixture is passed through a 160-mesh double-layer screen, the yield is calculated, then siloxane is added with stirring of a high-speed stirrer at a rotation speed of 500r/min, and after stirring for 15-20min, the 800 ℃ high temperature resistant nano ceramic coating is obtained.
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| CN201711337785.1A CN108034354B (en) | 2017-12-14 | 2017-12-14 | Nano ceramic coating for resisting high temperature of 800 ℃ and preparation process thereof |
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| CN108034354B true CN108034354B (en) | 2020-04-28 |
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| CN108774462B (en) * | 2018-06-08 | 2020-08-07 | 湖南航天三丰科工有限公司 | Room-temperature-curing high-temperature-resistant anticorrosive coating and preparation method thereof |
| CN110684381A (en) * | 2019-10-12 | 2020-01-14 | 虎皇新材料科技集团有限公司 | Water-based paint capable of replacing ceramic glaze ground coat and preparation method thereof |
| CN112592627A (en) * | 2020-12-04 | 2021-04-02 | 湖南格仑新材股份有限公司 | Production and preparation method of anticorrosive paint |
| CN116333591A (en) * | 2023-02-07 | 2023-06-27 | 雷索新材料(苏州)有限公司 | High-temperature flame-retardant insulating coating and preparation method thereof |
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| CN101096486B (en) * | 2006-06-29 | 2010-06-09 | 彭文表 | Temperature-resistant rust anticorrosion paint and preparation method thereof |
| CN103113768A (en) * | 2013-03-08 | 2013-05-22 | 苏州纳迪微电子有限公司 | High temperature resistant coating for engine exhaust system |
| CN103952056B (en) * | 2014-05-21 | 2016-06-01 | 航天材料及工艺研究所 | A kind of anticorrosion aluminum paint of high temperature resistant lubrication and its preparation method |
| CN106986606B (en) * | 2017-04-01 | 2019-08-27 | 上海宜瓷龙新材料股份有限公司 | A kind of waterproof ceramic coating and preparation method thereof for cement matrix surface |
| CN106977983B (en) * | 2017-04-21 | 2019-10-01 | 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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