CN112063296A - High-hardness fireproof hydrophobic stone-like ceramic coating, and preparation process and application thereof - Google Patents
High-hardness fireproof hydrophobic stone-like ceramic coating, and preparation process and application thereof Download PDFInfo
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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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- 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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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The utility model provides a high rigidity fire prevention hydrophobic type imitative stone material ceramic coating, preparation technology and application, relates to dalle application technical field, including first solution, second solution and third solution, first solution includes silica water dispersion, calcined kaolin, inorganic pigment, deionized water, defoaming agent and dispersant, and the second solution includes methyl trimethoxy silane, methyl triethoxy silane, flatting agent and formic acid, and the third solution includes protection rubber powder, deionized water, and the part by weight of each component is as follows: aqueous silica dispersion: 20-30 parts of calcined kaolin: 5-10 parts of inorganic pigment: 10-15 parts of deionized water: 25-30 parts of defoaming agent: 0.5-1 part of dispersant: 0.5-1 part of methyltrimethoxysilane: 20-25 parts of methyl triethoxysilane: 5-8 parts of a leveling agent: 0.8-1.5 parts of formic acid: 0.5-1.5 parts of protective rubber powder: 3-5 parts of deionized water: 20-30 parts of the stone-like ceramic coating, the hardness is better, and the fireproof performance, the water resistance and the weather resistance are better.
Description
Technical Field
The invention relates to the technical field of decorative plate coating, in particular to a high-hardness fireproof hydrophobic stone-like ceramic coating, a preparation process and application.
Background
In the architectural decoration field, for example, the coating of the outer aluminum curtain wall of a building, the decoration of the inner and outer vertical surfaces of a building, the decoration of the inner wall of a tunnel, in order to ensure the overall aesthetic feeling, the stone-like coating is generally adopted as a coating layer to be cured on the surfaces of the curtain wall and the wall, the traditional stone-like coating takes acrylic emulsion as a film forming material, and because acrylic resin is aliphatic oligomer, the traditional stone-like coating has the following defects:
1. the traditional acrylic emulsion stone-like coating has the hardness of less than 1H and lower hardness level, can peel off a coating by using external force slightly, is easy to scratch at a part which is frequently contacted with a person in daily use after finishing wall decoration, is difficult to achieve the performances of hard texture and collision resistance with natural stone, has rough surface after the wall is worn, is easy to adhere impurities and is difficult to clean;
2. the traditional acrylic emulsion stone-like coating has low fire-proof grade due to the acrylic resin, is easy to burn, carbonize and release smoke when meeting high temperature or open fire, is difficult to apply to places with high fire-proof grade, and is not suitable for large-scale decoration of indoor closed public places;
3. the traditional acrylic emulsion stone-like coating has poor weather resistance, light resistance and water resistance after film formation.
In conclusion, the range of use of the stone-like coating is greatly limited, and therefore, there is a room for improvement.
Disclosure of Invention
Aiming at the defects in the prior art, one of the purposes of the invention is to provide a high-hardness fireproof hydrophobic stone-like ceramic coating, and the specific scheme is as follows:
a high-hardness fireproof hydrophobic stone-like ceramic coating comprises a first solution, a second solution and a third solution, wherein the first solution comprises a silicon oxide water dispersion liquid, calcined kaolin, an inorganic pigment, deionized water, a defoaming agent and a dispersing agent, the second solution comprises methyl trimethoxy silane, methyl triethoxy silane, a leveling agent and formic acid, and the third solution comprises protective rubber powder and deionized water;
the first solution comprises the following components in parts by weight:
aqueous silica dispersion: 20-30 parts of
Calcined kaolin: 5-10 parts of
Inorganic pigment: 10-15 parts of
Deionized water: 25-30 parts of
Defoaming agent: 0.5 to 1 portion
Dispersing agent: 0.5 to 1 portion
The second solution comprises the following components in parts by weight:
methyltrimethoxysilane: 20-25 parts of
Methyltriethoxysilane: 5-8 parts of
Leveling agent: 0.8 to 1.5 portions of
Formic acid: 0.5 to 1.5 portions of
The third solution comprises the following components in parts by weight:
protective rubber powder: 3-5 parts of
Deionized water: 20-30 parts.
Further, the calcined kaolin is in powder form.
Further, the aqueous silica dispersion is a nano-scale dispersion.
The invention also aims to provide a preparation process of the high-hardness fireproof hydrophobic stone-like ceramic coating, which comprises the following specific scheme:
the method comprises the following steps:
preparation of the first solution: sequentially adding silicon oxide water dispersion, calcined kaolin, inorganic pigment, deionized water, a defoaming agent and a dispersing agent into a 1L reactor under the stirring action of a dispersion machine in proportion, wherein the rotating speed of the dispersion machine is 800-1000 r/min, after dispersing for 10-15 minutes, moving the 1L reactor into a basket type grinding machine for grinding at the rotating speed of 1000-1200 r/min for 60-70 minutes, and transferring the ground product into a sealed plastic bottle;
preparation of the second solution: sequentially adding methyltrimethoxysilane, methyltriethoxysilane, a leveling agent and formic acid according to the formula ratio, filling into a new closed plastic bottle, sealing the bottle opening, placing on a bottle rolling machine, and dispersing for 15-20 minutes at the rotation speed of 100-;
preparation of the third solution: putting deionized water into a 1-liter reactor, then placing the reactor on a dispersion machine, slowly adding the protective rubber powder into the deionized water at the rotating speed of 1500r/min, and continuously dispersing for 60-90 minutes after all the protective rubber powder is added until the protective rubber solution presents a stable semitransparent colloid;
mixing the first solution and the second solution: pouring the prepared second solution into a sealed plastic bottle filled with the first solution, sealing the bottle mouth, putting the bottle on a bottle rolling machine, and dispersing for 6 hours at the rotation speed of 100-;
mixing the mixed solution of the first solution and the second solution with the third solution: and taking 200g of the dispersion liquid after 6 hours of dispersion, adding 50g of the third solution, uniformly stirring by using a toning knife, pouring the uniformly stirred solution into a granulator, and stirring by using the granulator to obtain the stone-like ceramic particles, namely the stone-like ceramic paint.
Further, in the preparation of the first solution, the ground first solution is filtered through a 300-mesh filter cloth and then transferred to a sealed plastic bottle.
Further, in the preparation of the first solution, the basket grinder is cooled by externally connecting cooling water in the grinding process.
Further, the capacity of the sealed plastic bottle is 1L or 5L.
The invention also aims to provide application of the high-hardness fireproof hydrophobic stone-like ceramic coating, and the specific scheme is as follows:
the application of the high-hardness fireproof hydrophobic stone-like ceramic coating comprises the steps of firstly spraying a dispersion liquid obtained by mixing a first solution and a second solution on a rough base material, then spraying stone-like ceramic particles for the second time until the base material is completely covered, and then curing at normal temperature for 4-8 hours or heating and curing at 140-160 ℃ for 15-20 minutes.
Compared with the prior art, the invention has the following beneficial effects:
(1) during preparation, the components are uniformly dispersed under the action of a dispersing agent, monomers generated after hydrolysis of methyltrimethoxysilane and methyltriethoxysilane are polymerized again to form a net structure under an acidic environment, a film is gradually formed, the film forming structure of a coating is a-Si-O-structure, the bond energy of Si-O is 452KJ/mol, which is larger than C-H bond 414KJ/mol and C-C bond 332KJ/mol of the traditional acrylic emulsion stone-like coating, the final weather resistance and hardness of the coating are improved due to the formation of the net structure, the hardness and wear resistance of the coating are further improved by taking calcined kaolin and silicon oxide water dispersion liquid as a filler, and calcined kaolin has higher whiteness and opacity when taken as the filler, the coating can also be endowed with better stability and color, and the protective rubber powder serves as a thickening agent, prevent aggregation of particles throughout the dispersion liquid system, provide the final color to the coating with inorganic pigments, and impart hydrophobicity to the coating with methyltriethoxysilane and methyltrimethoxysilane as organic liquids containing Si. After the coating is formed into a film on the surface of the plate, the surface of the plate is fully distributed with methyl, so that the surface tension of the plate is small and can reach 21-23dyn/cm, the plate is endowed with strong easy-to-clean performance, when the plate is washed by water, dust and other impurities flow away along with water flow, water drops are hardly remained on the surface of the plate, and the cleaning difficulty is reduced;
(2) the coating process is the same as that of the traditional stone-like coating, the stone-like ceramic coating is solidified on the surface of the substrate to form a two-layer coating structure, and the surface of the substrate is similar to a ceramic layer of a stone-like material, so that the stone-like effect is vivid, and the integral aesthetic degree is kept;
(3) the invention is suitable for wall decoration of curtain walls, inner and outer vertical surfaces of buildings and the like, is different from the traditional stone-like coating, and has strong self-cleaning property, super weather resistance and high fire-proof grade.
Detailed Description
The present invention will be described in further detail with reference to examples, but the present invention is not limited to these examples.
Example 1:
the first solution comprises the following components in parts by weight: 20 parts of nano silicon oxide water dispersion liquid, 5 parts of calcined kaolin, 10 parts of inorganic pigment, 25 parts of deionized water, 0.5 part of defoaming agent and 0.5 part of dispersing agent.
The second solution comprises the following components in parts by weight: 20 parts of methyltrimethoxysilane, 5 parts of methyltriethoxysilane, 0.8 part of leveling agent and 0.5 part of formic acid.
The third solution comprises the following components in parts by weight: 3 parts of protective rubber powder and 20 parts of deionized water.
Example 2:
the first solution comprises the following components in parts by weight: 25 parts of nano silicon oxide water dispersion liquid, 7.5 parts of calcined kaolin, 12.5 parts of inorganic pigment, 27.5 parts of deionized water, 0.75 part of defoaming agent and 0.75 part of dispersing agent.
The second solution comprises the following components in parts by weight: 22.5 parts of methyltrimethoxysilane, 6.5 parts of methyltriethoxysilane, 1.2 parts of leveling agent and 1 part of formic acid.
The third solution comprises the following components in parts by weight: 4 parts of protective rubber powder and 25 parts of deionized water.
Example 3:
the first solution comprises the following components in parts by weight: 30 parts of nano silicon oxide water dispersion liquid, 10 parts of calcined kaolin, 15 parts of inorganic pigment, 30 parts of deionized water, 1 part of defoaming agent and 1 part of dispersing agent.
The second solution comprises the following components in parts by weight: 25 parts of methyltrimethoxysilane, 8 parts of methyltriethoxysilane, 1.5 parts of a leveling agent and 1.5 parts of formic acid.
The third solution comprises the following components in parts by weight: 5 parts of protective rubber powder and 30 parts of deionized water.
Comparative example 1: traditional acrylic emulsion stone-like coatings (e.g., SB-2).
Specifically, in examples 1 to 3, the calcined kaolin was in the form of powder, which may be GY915, the nano-silica aqueous dispersion may be of a commercially available general type, the inorganic pigment may include titanium dioxide, chrome yellow, iron blue, cadmium red, etc., the defoaming agent may be an organic silicon defoaming agent, the dispersing agent may be an anionic or nonionic dispersing agent, and the leveling agent may be a polyurethane leveling agent.
The preparation process of the stone-like ceramic coating in the embodiments comprises the following steps:
preparation of the first solution: sequentially adding silicon oxide water dispersion, calcined kaolin, inorganic pigment, deionized water, a defoaming agent and a dispersing agent into a 1L reactor under the stirring action of a dispersion machine according to a proportion, wherein the rotating speed of the dispersion machine is 900r/min, after dispersing for 15 minutes, moving the 1L reactor into a basket type grinding machine for grinding at the rotating speed of 1100r/min for 70 minutes, cooling by adopting external cooling water in the grinding process of the basket type grinding machine, filtering the ground first solution by 300-mesh filter cloth, and then transferring the first solution into a 1L sealed plastic bottle;
preparation of the second solution: sequentially adding methyltrimethoxysilane, methyltriethoxysilane, a leveling agent and formic acid according to the formula ratio, filling into a new sealed plastic bottle, sealing the bottle opening, placing on a bottle rolling machine, and dispersing for 20 minutes at the rotating speed of 110 r/min;
preparation of the third solution: putting deionized water into a 1-liter reactor, then placing the reactor on a dispersion machine, slowly adding the protective rubber powder into the deionized water at the rotating speed of 1500r/min, and continuously dispersing for 80 minutes after all the protective rubber powder is added until the protective rubber solution presents a stable semitransparent colloid;
mixing the first solution and the second solution: pouring the prepared second solution into a sealed plastic bottle filled with the first solution, sealing the bottle mouth, putting the bottle on a bottle rolling machine, and dispersing for 6 hours at the rotating speed of 110r/min in a room temperature environment;
mixing the mixed solution of the first solution and the second solution with the third solution: and taking out 200g of the dispersion liquid after 6 hours of dispersion, adding 50g of the third solution, uniformly stirring by using a toning knife, pouring the uniformly stirred solution into a granulator, and stirring by using the granulator to obtain the stone-like ceramic particles, namely the stone-like ceramic paint.
Specifically, the basket type grinder can adopt a basket type grinder with the model of LSM-2.2D, the dispersion machine can adopt a dispersion machine with the model of FS-800, the granulator can adopt a granulator with the model of ZH-50, and the sealed plastic bottle can adopt two capacities of 1L/5L, so that the selection can be conveniently carried out according to the capacity of the coating.
The high-hardness fireproof hydrophobic stone-like ceramic coating is applied to wall decoration of curtain walls, inner and outer vertical surfaces of buildings and the like, so that the invention is matched with a corresponding coating process, and the coating process specifically comprises the following steps: firstly, spraying the dispersion liquid obtained by mixing the first solution and the second solution on a rough base material, then spraying the stone-like ceramic particles for the second time until the base material is completely covered, and then curing at normal temperature for 4-8 hours or heating and curing at 140-160 ℃ for 15-20 minutes.
Performance testing
1. Hardness test
The test method comprises the following steps: the stone-like ceramic coatings of examples 1-3 and the acrylic emulsion stone-like coating of comparative example 1 were coated and cured on the same substrate according to the coating process described above, respectively, and tested according to the coating film scratch method in GB/T23443-2009 or GB/T9780-.
And (3) testing grade: 4H-9H, and the hardness of the pencil is 4H-9H (the hardness of the pencil represents the hardness of the measured coating film).
And (3) testing results:
| example 1 | Example 2 | Example 3 | Comparative example 1 | |
| Grade | 7H | 8H | 9H | 1H |
The above test results show that the test grades of the stone-like ceramic coatings of examples 1 to 3 are all higher than that of the conventional acrylic emulsion stone-like coating, and the test grade of example 3 is 9H, which reaches the highest grade, so that the hardness of the stone-like ceramic coating of the present invention is greatly improved compared with that of the conventional acrylic emulsion stone-like coating.
2. Fire test
The test method comprises the following steps: the stone-like ceramic coatings of examples 1-3 and the acrylic emulsion stone-like coating of comparative example 1 were applied and cured, respectively, on the same substrate according to the coating process described above and tested according to the DIN4102 building material fire performance requirements and test classification.
And (3) testing grade: a stage a1, a stage a2, a stage B1, a stage B2, and a stage B3.
After satisfying the A2 test, for the A1 test, the invention is cured on a plate as a sample, the sample is vertically placed in an electric furnace at 750 ℃, a flame of 20mm is applied, the experimental time is 15-30min, and the sample is considered to meet the A1 requirement if the following conditions are satisfied: the furnace has no flame, the temperature in the furnace is less than 50 ℃, and the requirement of A2 grade is met.
And (3) testing results:
the above test results show that the test grades of the stone-like ceramic coatings in examples 1 to 3 are all higher than that of the conventional acrylic emulsion stone-like coating, and the test grades in examples 1 to 3 are all A1 grades, which are higher than that of the conventional acrylic emulsion stone-like coating, so that the fire resistance of the stone-like ceramic coating is greatly improved compared with that of the conventional acrylic emulsion stone-like coating.
3. Water resistance test
The test method comprises the following steps: the stone-like ceramic coatings of examples 1-3 and the acrylic emulsion stone-like coating of comparative example 1 were coated and cured on the same substrate according to the coating process described above, respectively, and tested according to GB5237-2000 "boiling water resistance method", with the performance requirement being the presence of water spots after 24 hours of immersion.
| Example 1 | Example 2 | Example 3 | Comparative example 1 | |
| Grade | Is free of | Is free of | Is free of | Is provided with |
The test results show that the test results of the stone-like ceramic paint in the examples 1 to 3 are better than the test results of the traditional acrylic emulsion stone-like paint, and specifically, in the examples 1 to 3, the sample is not changed after being soaked in boiling water for 24 hours, while the sample in the comparative example 1 has a color change, so that the water resistance of the stone-like ceramic paint is greatly improved compared with the traditional acrylic emulsion stone-like paint.
4. Resistance to artificial aging test
The test method comprises the following steps: the stone-like ceramic paints of examples 1-3 and the acrylic emulsion stone-like paint of comparative example 1 were coated and cured on the same substrate according to the coating process described above, respectively, and tested by QUV artificial accelerated aging apparatus according to GB/T1865-1997 paint film artificial aging test, and after 4000 hours, color difference test was performed by Alice SP60 color difference apparatus.
And (3) testing grade:
level 0: no color change, and color difference value delta E less than or equal to 1.5.
Level 1: very slight discoloration, and the color difference value Delta E is between 1.6 and 3.0.
And 2, stage: slight discoloration, color difference delta E is between 3.1 and 6.0.
And (3) testing results:
| example 1 | Example 2 | Example 3 | Comparative example 1 | |
| Grade | Level 0 | Level 0 | Level 0 | Stage 2 |
The test results show that the test results of the stone-like ceramic paint in the examples 1-3 are better than the test results of the traditional acrylic emulsion stone-like paint, and specifically, in the examples 1-3, the color of the sample in the comparative example 1 changes after the sample is subjected to the artificial aging operation after 4000 hours, so that the artificial aging resistance of the stone-like ceramic paint is greatly improved compared with that of the traditional acrylic emulsion stone-like paint.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. The high-hardness fireproof hydrophobic stone-like ceramic coating is characterized by comprising a first solution, a second solution and a third solution, wherein the first solution comprises a silicon oxide water dispersion liquid, calcined kaolin, an inorganic pigment, deionized water, a defoaming agent and a dispersing agent, the second solution comprises methyltrimethoxysilane, methyltriethoxysilane, a leveling agent and formic acid, and the third solution comprises protective rubber powder and deionized water;
the first solution comprises the following components in parts by weight:
aqueous silica dispersion: 20-30 parts of
Calcined kaolin: 5-10 parts of
Inorganic pigment: 10-15 parts of
Deionized water: 25-30 parts of
Defoaming agent: 0.5 to 1 portion
Dispersing agent: 0.5 to 1 portion
The second solution comprises the following components in parts by weight:
methyltrimethoxysilane: 20-25 parts of
Methyltriethoxysilane: 5-8 parts of
Leveling agent: 0.8 to 1.5 portions of
Formic acid: 0.5 to 1.5 portions of
The third solution comprises the following components in parts by weight:
protective rubber powder: 3-5 parts of
Deionized water: 20-30 parts.
2. The high-hardness fireproof hydrophobic stone-like ceramic paint as claimed in claim 1, wherein the calcined kaolin is in powder form.
3. The high-hardness fireproof hydrophobic stone-like ceramic coating according to claim 1, wherein the aqueous silica dispersion is a nano-scale dispersion.
4. A preparation process of a high-hardness fireproof hydrophobic stone-like ceramic coating is characterized by comprising the following steps:
preparation of the first solution: sequentially adding silicon oxide water dispersion, calcined kaolin, inorganic pigment, deionized water, a defoaming agent and a dispersing agent into a 1L reactor under the stirring action of a dispersion machine in proportion, wherein the rotating speed of the dispersion machine is 800-1000 r/min, after dispersing for 10-15 minutes, moving the 1L reactor into a basket type grinding machine for grinding at the rotating speed of 1000-1200 r/min for 60-70 minutes, and transferring the ground product into a sealed plastic bottle;
preparation of the second solution: sequentially adding methyltrimethoxysilane, methyltriethoxysilane, a leveling agent and formic acid according to the formula ratio, filling into a new closed plastic bottle, sealing the bottle opening, placing on a bottle rolling machine, and dispersing for 15-20 minutes at the rotation speed of 100-;
preparation of the third solution: putting deionized water into a 1-liter reactor, then placing the reactor on a dispersion machine, slowly adding the protective rubber powder into the deionized water at the rotating speed of 1500r/min, and continuously dispersing for 60-90 minutes after all the protective rubber powder is added until the protective rubber solution presents a stable semitransparent colloid;
mixing the first solution and the second solution: pouring the prepared second solution into a sealed plastic bottle filled with the first solution, sealing the bottle mouth, putting the bottle on a bottle rolling machine, and dispersing for 6 hours at the rotation speed of 100-;
mixing the mixed solution of the first solution and the second solution with the third solution: and taking 200g of the dispersion liquid after 6 hours of dispersion, adding 50g of the third solution, uniformly stirring by using a toning knife, pouring the uniformly stirred solution into a granulator, and stirring by using the granulator to obtain the stone-like ceramic particles, namely the stone-like ceramic paint.
5. The preparation process of the high-hardness fireproof hydrophobic stone-like ceramic coating according to claim 4, wherein in the preparation of the first solution, the ground first solution is filtered by a 300-mesh filter cloth and then transferred to a sealed plastic bottle.
6. The preparation process of the high-hardness fireproof hydrophobic stone-like ceramic coating according to claim 5, wherein in the preparation of the first solution, the basket grinder is externally connected with cooling water for cooling in the grinding process.
7. The preparation process of the high-hardness fireproof hydrophobic stone-like ceramic coating according to claim 4, wherein the capacity of the sealed plastic bottle is 1L or 5L.
8. The application of the high-hardness fireproof hydrophobic stone-like ceramic coating is characterized in that a dispersion liquid obtained by mixing a first solution and a second solution is sprayed on a rough base material, then stone-like ceramic particles are sprayed for the second time until the base material is completely covered, and then the stone-like ceramic coating is cured at normal temperature for 4-8 hours or is kept at the temperature of 140-160 ℃ for 15-20 minutes and is heated and cured.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113956739A (en) * | 2021-11-29 | 2022-01-21 | 广东美家美福科技有限公司 | Granite coating and preparation process thereof |
| CN114591637A (en) * | 2022-02-25 | 2022-06-07 | 上海虹涂新材料科技有限公司 | Ceramic coating with stone-like effect and preparation method thereof |
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