CN115074006A - Building coating and preparation method thereof - Google Patents

Building coating and preparation method thereof Download PDF

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CN115074006A
CN115074006A CN202210845810.1A CN202210845810A CN115074006A CN 115074006 A CN115074006 A CN 115074006A CN 202210845810 A CN202210845810 A CN 202210845810A CN 115074006 A CN115074006 A CN 115074006A
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alkyd resin
suspension
powder
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CN115074006B (en
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庞俊
庞然来
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Cao Gengtang Wuxi Technology Development Co ltd
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D167/08Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08Anti-corrosive paints
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    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18Fireproof paints including high temperature resistant paints
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/61Additives non-macromolecular inorganic
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    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/61Additives non-macromolecular inorganic
    • C09D7/62Additives non-macromolecular inorganic modified by treatment with other compounds
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    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/70Additives characterised by shape, e.g. fibres, flakes or microspheres
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00Properties
    • C08L2201/02Flame or fire retardant/resistant
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00Properties
    • C08L2201/08Stabilised against heat, light or radiation or oxydation
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

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Abstract

The invention discloses an architectural coating and a preparation method thereof, wherein the architectural coating comprises the following components in parts by weight: 30-40 parts of organic silicon modified alkyd resin, 4-6 parts of kaolin, 4-6 parts of rare earth neodymium oxide, 4-6 parts of rare earth gadolinium oxide, 8-12 parts of silica aerogel suspension, 4-6 parts of nano titanium dioxide, 4-6 parts of nano magnesium aluminum silicate, 8-12 parts of silicone-acrylate emulsion, 18-22 parts of modified medical stone powder, 4-6 parts of fumed silica, 8-10 parts of photocatalyst modified activated carbon, 8-12 parts of seaweed powder, 3-6 parts of preservative and 50-60 parts of water; not only can release high-concentration negative oxygen ions, but also has the effects of heat insulation and high temperature resistance, and is an architectural coating with excellent comprehensive performance.

Description

Building coating and preparation method thereof
Technical Field
The invention relates to a coating composition, in particular to an architectural coating and a preparation method thereof.
Background
The negative oxygen ion is oxygen ion with negative charge of 1 or more than 1 electron, is beneficial to human body's physical and mental health, and can affect human body's physiological activities through human nervous system and blood circulation.
The patent technology with publication number CN111808531B discloses a decorative coating capable of decomposing formaldehyde and releasing high-concentration negative oxygen ions, which comprises the following components in parts by weight: the coating additive comprises 200-300 parts of water and 55-70 parts of water, and comprises the following components in parts by weight: 55-75 parts of an auxiliary agent, 15-20 parts of modified tourmaline, 5-9 parts of aloe freeze-dried powder, 8-10 parts of calcium phosphate powder, 5-10 parts of hydroxymethyl cellulose, 10-20 parts of thymall powder, 10-15 parts of bentonite and 8-15 parts of ash calcium; the decorative coating in the prior art can release negative oxygen ions with certain concentration, but has poor heat insulation effect.
Disclosure of Invention
The invention provides a building coating which can release high-concentration negative oxygen ions and has the effects of heat insulation and high temperature resistance, and is a building coating with excellent comprehensive performance; the technical scheme is as follows:
an architectural coating comprises the following components in parts by weight: 30-40 parts of organic silicon modified alkyd resin, 4-6 parts of kaolin, 4-6 parts of rare earth neodymium oxide, 4-6 parts of rare earth gadolinium oxide, 8-12 parts of silica aerogel suspension, 4-6 parts of nano titanium dioxide, 4-6 parts of nano magnesium aluminum silicate, 8-12 parts of silicone-acrylate emulsion, 18-22 parts of modified medical stone powder, 4-6 parts of fumed silica, 8-10 parts of photocatalyst modified activated carbon, 8-12 parts of seaweed powder, 3-6 parts of preservative and 50-60 parts of water;
the modified medical stone powder is prepared by the following steps:
1) firstly, 200-mesh medical stone powder is placed in a muffle furnace and roasted for 4-5 hours at the temperature of 500-600 ℃;
2) taking the following components in parts by weight: 15-20 parts of medical stone, 4-6 parts of negative oxygen ion powder of 400 meshes, 8-12 parts of tourmaline powder of 400 meshes and 80-100 parts of NaOH solution with the mass fraction of 2% -5% after roasting in the step 1), uniformly mixing the components, ultrasonically dispersing for 3-4 h, drying under natural conditions, then drying at 60-70 ℃ for 3-4 h, and roasting in a muffle furnace at 300-400 ℃ for 3-4 h to obtain modified medical stone powder;
the photocatalyst modified activated carbon is prepared by the following steps:
a) adding 4-6 parts by weight of 400-mesh photocatalyst powder into 40-50 parts by weight of water, uniformly mixing, and performing ultrasonic dispersion for 30-60 min to obtain a photocatalyst suspension;
b) and (2) taking 10-15 parts by weight of 200-mesh activated carbon, fully soaking in the photocatalyst suspension, ultrasonically dispersing for 2-3 h, drying under natural conditions, and drying at 100-120 ℃ for 3-5 h to obtain the photocatalyst modified activated carbon.
The internal structure of the medical stone can be loosened and porous through roasting, and the negative oxygen ion powder and the tourmaline powder are loaded on the loosened and porous medical stone, so that the negative oxygen ion powder and the tourmaline powder are favorable for ionizing air; and loose and porous medical stone has good heat insulation performance.
The active carbon is an adsorbent with a porous structure, has a high specific surface area, enables a photocatalyst to be loaded on the active carbon, and is beneficial to the photocatalyst to degrade harmful gases in the air.
Preferably, the preparation of the silicone-modified alkyd resin comprises the following steps: the method comprises the steps of reacting linseed oil, pentaerythritol and a catalyst LiOH at 220-230 ℃ until the tolerance is 8-12, adding phthalic anhydride, heating to 230-240 ℃, reacting until the acid value reaches 14-16, cooling to 100-110 ℃ to obtain alkyd resin, adding No. 200 solvent oil and xylene into the alkyd resin, and uniformly mixing to obtain an alkyd resin solution; adding hydroxyl siloxane, taking tetraisopropyl titanate as a catalyst, heating to 125-135 ℃, reacting for 3-4 h, and removing the solvent after the reaction is finished; wherein the content of the hydroxyl siloxane is 45-50% of that of the alkyd resin.
Compared with oleic acid and glycerol, the alkyd resin prepared by selecting linseed oil and pentaerythritol has a rich three-dimensional network structure; compared with the method that the alkyd resin is modified by adopting the silicone intermediate, hydroxyl is introduced into the modified alkyd resin obtained by modifying the alkyd resin by adopting the hydroxyl siloxane, so that the modified alkyd resin has good adhesive force.
The nanometer magnesium aluminum silicate forms a three-dimensional network structure in an aqueous medium, has excellent adsorption performance, thickening performance and suspension performance, can enhance the dispersibility of the silica aerogel suspension, and further improves the heat insulation and fire prevention effects.
The fumed silica has large specific surface area, strong surface adsorption capacity, excellent dispersibility, thickening property and thixotropy.
The modified alkyd resin prepared by the invention has rich three-dimensional network structure, is matched with nano magnesium aluminum silicate and fumed silica, and is beneficial to further enhancing the dispersibility of the silica aerogel suspension, so that the heat insulation and fire prevention effects are improved.
The modified alkyd resin prepared by the invention has rich three-dimensional network structure, is matched with nano magnesium aluminum silicate and fumed silica, is favorable for dispersing the modified medical stone powder, and is favorable for the negative oxygen ion powder and the tourmaline powder to ionize air.
The modified alkyd resin prepared by the invention has rich three-dimensional network structure, is matched with nano magnesium aluminum silicate and fumed silica, is favorable for dispersing photocatalyst activated carbon, and is favorable for degrading harmful gases in the air by using a photocatalyst.
Preferably, the silica aerogel suspension is a stable dispersion system formed by uniformly mixing 40 wt% of silica aerogel, 5 wt% of sucrose monostearate, 10 wt% of epoxy resin emulsion and 45 wt% of water.
The silicon aerogel powder is coated and modified to form the silicon aerogel suspension, and compared with the silicon aerogel powder, the silicon aerogel suspension has the following effects: the dispersibility of the silica aerogel suspension in the system is improved, and the heat insulation and fire prevention effects are improved; in addition, the collapse of the silicon aerogel nano-pore structure can be avoided to a certain extent.
The invention also provides a preparation method of the architectural coating, which comprises the following steps:
s1, taking materials according to the proportion of the invention, mixing the organic silicon modified alkyd resin, the silicone-acrylate emulsion, the preservative and the water uniformly to obtain a solution A,
s2, ball-milling kaolin, nano titanium dioxide, rare earth neodymium oxide and rare earth gadolinium oxide, sieving by a 400-mesh sieve, adding the sieved powder into the solution A, and uniformly mixing to obtain a suspension B;
s3, adding modified medical stone powder, photocatalyst modified activated carbon and seaweed powder into the suspension B to obtain a suspension C;
s4, adding nano magnesium aluminum silicate and fumed silica into the suspension C, and uniformly mixing to obtain slurry D;
and S5, adding the silica aerogel suspension into the slurry D, and uniformly dispersing to obtain the fireproof coating.
The invention has the beneficial effects that:
1) the internal structure of the medical stone can be loosened and porous through roasting, and the negative oxygen ion powder and the tourmaline powder are loaded on the loosened and porous medical stone, so that the negative oxygen ion powder and the tourmaline powder are favorable for ionizing air; and loose and porous medical stone has good heat insulation performance.
2) The active carbon is an adsorbent with a porous structure, has a high specific surface area, enables a photocatalyst to be loaded on the active carbon, and is beneficial to the photocatalyst to degrade harmful gases in the air.
3) The modified alkyd resin prepared by the invention has rich three-dimensional network structure, is matched with nano magnesium aluminum silicate and fumed silica, and is beneficial to further enhancing the dispersibility of the silica aerogel suspension, so that the heat insulation and fire prevention effects are improved.
4) The modified alkyd resin prepared by the invention has a rich three-dimensional network structure, is matched with nano magnesium aluminum silicate and fumed silica, is beneficial to dispersion of the modified medical stone powder, and is beneficial to ionization of air by negative oxygen ion powder and tourmaline powder.
5) The modified alkyd resin prepared by the invention has rich three-dimensional network structure, is matched with nano magnesium aluminum silicate and fumed silica, is favorable for dispersing photocatalyst activated carbon, and is favorable for degrading harmful gases in the air by using a photocatalyst.
6) The silicon aerogel powder is coated and modified to form the silicon aerogel suspension, and compared with the silicon aerogel powder, the silicon aerogel suspension has the following effects: the dispersibility of the silica aerogel suspension in the system is improved, and the heat insulation and fire prevention effects are improved; in addition, the collapse of the silicon aerogel nano-pore structure can be avoided to a certain extent.
7) The building coating can obviously improve the release capacity of negative oxygen ions in the coating, can release more than 10000 units of negative oxygen ions per cubic meter, is waterproof, anticorrosive, good in weather resistance, good in covering power, good in covering rate, yellowing-resistant, high-temperature-resistant, capable of preserving heat and cracking, capable of effectively insulating heat at a high temperature of 200 ℃, capable of resisting open fire combustion at a temperature of more than 1200 ℃, free of odor, free of voc and free of formaldehyde.
Detailed Description
Example 1
The modified medical stone powder is prepared by the following steps:
1) firstly, 200-mesh medical stone powder is placed in a muffle furnace and roasted for 5 hours at 500 ℃;
2) taking the following components in parts by weight: 15 parts of medical stone, 4 parts of negative oxygen ion powder of 400 meshes, 8 parts of tourmaline powder of 400 meshes and 80 parts of NaOH solution with the mass fraction of 2% after roasting in the step 1), uniformly mixing the components, ultrasonically dispersing for 3 hours, drying under natural conditions, drying at 60 ℃ for 3 hours, and roasting in a muffle furnace at 300 ℃ for 3 hours to obtain modified medical stone powder;
the photocatalyst modified activated carbon is prepared by the following steps:
a) adding 6 parts by weight of 400-mesh photocatalyst powder into 50 parts by weight of water, uniformly mixing, and performing ultrasonic dispersion for 60min to obtain a photocatalyst suspension;
b) taking 15 parts by weight of 200-mesh active carbon, putting the active carbon in the photocatalyst suspension for full infiltration, performing ultrasonic dispersion for 3 hours, drying under natural conditions, and then drying at 120 ℃ for 5 hours to obtain the photocatalyst modified active carbon.
The preparation of the organic silicon modified alkyd resin comprises the following steps: the method comprises the steps of reacting linseed oil, pentaerythritol and a catalyst LiOH at 220-230 ℃ until the tolerance is 8, adding phthalic anhydride, heating to 230-240 ℃, reacting until the acid value reaches 14, cooling to 100-110 ℃ to obtain alkyd resin, adding No. 200 solvent oil and xylene into the alkyd resin, and uniformly mixing to obtain an alkyd resin solution; and adding hydroxyl siloxane (the content of the hydroxyl siloxane is 45 percent of that of the alkyd resin), taking tetraisopropyl titanate as a catalyst, heating to 125-135 ℃, reacting for 3 hours, and removing the solvent by using a rotary evaporator after the reaction is finished. In the invention: the content of the hydroxyl siloxane is 45 percent of that of the alkyd resin, and specifically, the weight of the added hydroxyl siloxane is 45 percent of that of the alkyd resin.
The silica aerogel suspension is a stable dispersion system formed by uniformly mixing 40 wt% of silica aerogel, 5 wt% of sucrose monostearate, 10 wt% of epoxy resin emulsion and 45 wt% of water; the preparation method comprises the following steps: and uniformly mixing water and sucrose monostearate, adding the silica aerogel and the epoxy resin emulsion, and uniformly mixing to form a silica aerogel suspension.
An architectural coating comprises the following components in parts by weight: 30 parts of organic silicon modified alkyd resin, 4 parts of kaolin, 6 parts of rare earth neodymium oxide, 4 parts of rare earth gadolinium oxide, 8 parts of silica aerogel suspension, 4 parts of nano titanium dioxide, 4 parts of nano magnesium aluminum silicate, 8 parts of silicone acrylic emulsion, 18 parts of modified medical stone powder, 4 parts of gas-phase silica, 8 parts of photocatalyst modified activated carbon, 8 parts of seaweed powder, 3 parts of preservative and 50 parts of water;
a preparation method of an architectural coating specifically comprises the following steps:
s1, taking materials according to the proportion of the invention, mixing the organic silicon modified alkyd resin, the silicone-acrylate emulsion, the preservative and the water uniformly to obtain a solution A,
s2, ball-milling kaolin, nano titanium dioxide, rare earth neodymium oxide and rare earth gadolinium oxide, sieving by a 400-mesh sieve, adding the sieved powder into the solution A, and uniformly mixing to obtain a suspension B;
s3, adding modified medical stone powder, photocatalyst modified activated carbon and seaweed powder into the suspension B to obtain a suspension C;
s4, adding nano magnesium aluminum silicate and fumed silica into the suspension C, and uniformly mixing to obtain slurry D;
and S5, adding the silica aerogel suspension into the slurry D, and uniformly dispersing to obtain the fireproof coating.
Example 2
The modified medical stone powder is prepared by the following steps:
1) firstly, 200-mesh medical stone powder is placed in a muffle furnace and roasted for 4 hours at the temperature of 600 ℃;
2) taking the following components in parts by weight: 20 parts of medical stone, 6 parts of negative oxygen ion powder of 400 meshes, 8 parts of tourmaline powder of 400 meshes and 100 parts of NaOH solution with the mass fraction of 5% which are roasted in the step 1), uniformly mixing the components, ultrasonically dispersing for 4h, drying under natural conditions, drying at 70 ℃ for 3h, and roasting in a muffle furnace at 400 ℃ for 3h to obtain modified medical stone powder;
the photocatalyst modified activated carbon is prepared by the following steps:
a) adding 4 parts by weight of 400-mesh photocatalyst powder into 40 parts by weight of water, uniformly mixing, and performing ultrasonic dispersion for 30min to obtain a photocatalyst suspension;
b) and (3) taking 10 parts by weight of 200-mesh active carbon, placing the active carbon in the photocatalyst suspension for full infiltration, performing ultrasonic dispersion for 2 hours, drying under natural conditions, and then placing the active carbon at 100 ℃ for drying for 5 hours to obtain the photocatalyst modified active carbon.
The preparation of the organic silicon modified alkyd resin comprises the following steps: the method comprises the steps of reacting linseed oil, pentaerythritol and a catalyst LiOH at 220-230 ℃ until the tolerance is 8, adding phthalic anhydride, heating to 230-240 ℃, reacting until the acid value reaches 14, cooling to 100-110 ℃ to obtain alkyd resin, adding No. 200 solvent oil and xylene into the alkyd resin, and uniformly mixing to obtain an alkyd resin solution; and adding hydroxyl siloxane (the content of the hydroxyl siloxane is 45 percent of that of the alkyd resin), taking tetraisopropyl titanate as a catalyst, heating to 125-135 ℃, reacting for 3 hours, and removing the solvent by using a rotary evaporator after the reaction is finished. In the invention: the content of the hydroxyl siloxane is 45 percent of that of the alkyd resin, and specifically, the weight of the added hydroxyl siloxane is 45 percent of that of the alkyd resin.
The silica aerogel suspension is a stable dispersion system formed by uniformly mixing 40 wt% of silica aerogel, 5 wt% of sucrose monostearate, 10 wt% of epoxy resin emulsion and 45 wt% of water; the preparation method comprises the following steps: and uniformly mixing water and sucrose monostearate, adding the silica aerogel and the epoxy resin emulsion, and uniformly mixing to form a silica aerogel suspension.
An architectural coating comprises the following components in parts by weight: 40 parts of organic silicon modified alkyd resin, 6 parts of kaolin, 4 parts of rare earth neodymium oxide, 6 parts of rare earth gadolinium oxide, 12 parts of silica aerogel suspension, 6 parts of nano titanium dioxide, 6 parts of nano magnesium aluminum silicate, 12 parts of silicone acrylic emulsion, 22 parts of modified medical stone powder, 6 parts of fumed silica, 10 parts of photocatalyst modified activated carbon, 12 parts of seaweed powder, 6 parts of preservative and 60 parts of water;
a preparation method of an architectural coating specifically comprises the following steps:
s1, taking materials according to the proportion of the invention, mixing the organic silicon modified alkyd resin, the silicone-acrylate emulsion, the preservative and the water uniformly to obtain a solution A,
s2, ball-milling kaolin, nano titanium dioxide, rare earth neodymium oxide and rare earth gadolinium oxide, sieving by a 400-mesh sieve, adding the sieved powder into the solution A, and uniformly mixing to obtain a suspension B;
s3, adding modified medical stone powder, photocatalyst modified activated carbon and seaweed powder into the suspension B to obtain a suspension C;
s4, adding nano magnesium aluminum silicate and fumed silica into the suspension C, and uniformly mixing to obtain slurry D;
and S5, adding the silica aerogel suspension into the slurry D, and uniformly dispersing to obtain the fireproof coating.
Example 3
The modified medical stone powder is prepared by the following steps:
1) firstly, 200-mesh medical stone powder is placed in a muffle furnace and roasted for 4 hours at the temperature of 550 ℃;
2) taking the following components in parts by weight: 18 parts of medical stone, 5 parts of negative oxygen ion powder of 400 meshes, 10 parts of tourmaline powder of 400 meshes and 90 parts of NaOH solution with the mass fraction of 3% after roasting in the step 1), uniformly mixing the components, ultrasonically dispersing for 4 hours, drying under natural conditions, drying at 65 ℃ for 3 hours, and roasting in a muffle furnace at 350 ℃ for 3 hours to obtain modified medical stone powder;
the photocatalyst modified activated carbon is prepared by the following steps:
a) adding 5 parts by weight of 400-mesh photocatalyst powder into 45 parts by weight of water, uniformly mixing, and performing ultrasonic dispersion for 45min to obtain a photocatalyst suspension;
b) and (2) taking 12 parts by weight of 200-mesh activated carbon, fully soaking in the photocatalyst suspension, performing ultrasonic dispersion for 2 hours, drying under natural conditions, and then drying at 110 ℃ for 5 hours to obtain the photocatalyst modified activated carbon.
The preparation of the organic silicon modified alkyd resin comprises the following steps: the method comprises the steps of reacting linseed oil, pentaerythritol and a catalyst LiOH at 220-230 ℃ until the tolerance is 8, adding phthalic anhydride, heating to 230-240 ℃, reacting until the acid value reaches 14, cooling to 100-110 ℃ to obtain alkyd resin, adding No. 200 solvent oil and xylene into the alkyd resin, and uniformly mixing to obtain an alkyd resin solution; and adding hydroxyl siloxane (the content of the hydroxyl siloxane is 45 percent of that of the alkyd resin), taking tetraisopropyl titanate as a catalyst, heating to 125-135 ℃, reacting for 3 hours, and removing the solvent by using a rotary evaporator after the reaction is finished. In the invention: the content of the hydroxyl siloxane is 45 percent of that of the alkyd resin, and specifically, the weight of the added hydroxyl siloxane is 45 percent of that of the alkyd resin.
The silica aerogel suspension is a stable dispersion system formed by uniformly mixing 40 wt% of silica aerogel, 5 wt% of sucrose monostearate, 10 wt% of epoxy resin emulsion and 45 wt% of water; the preparation method comprises the following steps: and uniformly mixing water and sucrose monostearate, adding the silica aerogel and the epoxy resin emulsion, and uniformly mixing to form a silica aerogel suspension.
An architectural coating comprises the following components in parts by weight: 35 parts of organic silicon modified alkyd resin, 5 parts of kaolin, 5 parts of rare earth neodymium oxide, 5 parts of rare earth gadolinium oxide, 10 parts of silica aerogel suspension, 5 parts of nano titanium dioxide, 5 parts of nano magnesium aluminum silicate, 10 parts of silicone acrylic emulsion, 20 parts of modified medical stone powder, 5 parts of fumed silica, 9 parts of photocatalyst modified activated carbon, 10 parts of seaweed powder, 5 parts of preservative and 55 parts of water;
a preparation method of an architectural coating specifically comprises the following steps:
s1, taking materials according to the proportion of the invention, mixing the organic silicon modified alkyd resin, the silicone-acrylate emulsion, the preservative and the water uniformly to obtain a solution A,
s2, ball-milling kaolin, nano titanium dioxide, rare earth neodymium oxide and rare earth gadolinium oxide, sieving by a 400-mesh sieve, adding the sieved powder into the solution A, and uniformly mixing to obtain a suspension B;
s3, adding modified medical stone powder, photocatalyst modified activated carbon and seaweed powder into the suspension B to obtain a suspension C;
s4, adding nano magnesium aluminum silicate and fumed silica into the suspension C, and uniformly mixing to obtain slurry D;
and S5, adding the silica aerogel suspension into the slurry D, and uniformly dispersing to obtain the fireproof coating.
Comparative example 1
The photocatalyst modified activated carbon is prepared by the following steps:
a) adding 6 parts by weight of 400-mesh photocatalyst powder into 50 parts by weight of water, uniformly mixing, and performing ultrasonic dispersion for 60min to obtain a photocatalyst suspension;
b) taking 15 parts by weight of 200-mesh active carbon, putting the active carbon in the photocatalyst suspension for full infiltration, performing ultrasonic dispersion for 3 hours, drying under natural conditions, and then drying at 120 ℃ for 5 hours to obtain the photocatalyst modified active carbon.
The preparation of the organic silicon modified alkyd resin comprises the following steps: the method comprises the steps of reacting linseed oil, pentaerythritol and a catalyst LiOH at 220-230 ℃ until the tolerance is 8, adding phthalic anhydride, heating to 230-240 ℃, reacting until the acid value reaches 14, cooling to 100-110 ℃ to obtain alkyd resin, adding No. 200 solvent oil and xylene into the alkyd resin, and uniformly mixing to obtain an alkyd resin solution; and adding hydroxyl siloxane (the content of the hydroxyl siloxane is 45 percent of that of the alkyd resin), taking tetraisopropyl titanate as a catalyst, heating to 125-135 ℃, reacting for 3 hours, and removing the solvent by using a rotary evaporator after the reaction is finished. In the invention: the content of the hydroxyl siloxane is 45 percent of that of the alkyd resin, and specifically, the weight of the added hydroxyl siloxane is 45 percent of that of the alkyd resin.
The silica aerogel suspension is a stable dispersion system formed by uniformly mixing 40 wt% of silica aerogel, 5 wt% of sucrose monostearate, 10 wt% of epoxy resin emulsion and 45 wt% of water; the preparation method comprises the following steps: and uniformly mixing water and sucrose monostearate, adding the silica aerogel and the epoxy resin emulsion, and uniformly mixing to form a silica aerogel suspension.
An architectural coating comprises the following components in parts by weight: 30 parts of organic silicon modified alkyd resin, 4 parts of kaolin, 6 parts of rare earth neodymium oxide, 4 parts of rare earth gadolinium oxide, 8 parts of silica aerogel suspension, 4 parts of nano titanium dioxide, 4 parts of nano magnesium aluminum silicate, 8 parts of silicone acrylic emulsion, 8 parts of medical stone powder, 5 parts of negative oxygen ion powder, 5 parts of tourmaline powder, 4 parts of fumed silica, 8 parts of photocatalyst modified activated carbon, 8 parts of seaweed powder, 3 parts of preservative and 50 parts of water;
a preparation method of an architectural coating specifically comprises the following steps:
s1, taking materials according to the proportion of the invention, mixing the organic silicon modified alkyd resin, the silicone-acrylate emulsion, the preservative and the water uniformly to obtain a solution A,
s2, ball-milling kaolin, nano titanium dioxide, rare earth neodymium oxide and rare earth gadolinium oxide, sieving by a 400-mesh sieve, adding into the solution A, and mixing uniformly to obtain a suspension B;
s3, adding medical stone powder, negative oxygen ion powder, tourmaline powder, photocatalyst modified activated carbon and seaweed powder into the suspension B to obtain a suspension C;
s4, adding nano magnesium aluminum silicate and fumed silica into the suspension C, and uniformly mixing to obtain slurry D;
and S5, adding the silica aerogel suspension into the slurry D, and uniformly dispersing to obtain the fireproof coating.
Comparative example 2
The modified medical stone powder is prepared by the following steps:
1) firstly, 200-mesh medical stone powder is placed in a muffle furnace and roasted for 5 hours at 500 ℃;
2) taking the following components in parts by weight: 15 parts of medical stone, 4 parts of negative oxygen ion powder of 400 meshes, 8 parts of tourmaline powder of 400 meshes and 80 parts of NaOH solution with the mass fraction of 2% after roasting in the step 1), uniformly mixing the components, ultrasonically dispersing for 3 hours, drying under natural conditions, drying at 60 ℃ for 3 hours, and roasting in a muffle furnace at 300 ℃ for 3 hours to obtain modified medical stone powder;
the preparation of the organic silicon modified alkyd resin comprises the following steps: the method comprises the steps of reacting linseed oil, pentaerythritol and a catalyst LiOH at 220-230 ℃ until the tolerance is 8, adding phthalic anhydride, heating to 230-240 ℃, reacting until the acid value reaches 14, cooling to 100-110 ℃ to obtain alkyd resin, adding No. 200 solvent oil and xylene into the alkyd resin, and uniformly mixing to obtain an alkyd resin solution; and adding hydroxyl siloxane (the content of the hydroxyl siloxane is 45 percent of that of the alkyd resin), taking tetraisopropyl titanate as a catalyst, heating to 125-135 ℃, reacting for 3 hours, and removing the solvent by using a rotary evaporator after the reaction is finished. In the invention: the content of the hydroxyl siloxane is 45 percent of that of the alkyd resin, and specifically, the weight of the added hydroxyl siloxane is 45 percent of that of the alkyd resin.
The silica aerogel suspension is a stable dispersion system formed by uniformly mixing 40 wt% of silica aerogel, 5 wt% of sucrose monostearate, 10 wt% of epoxy resin emulsion and 45 wt% of water; the preparation method comprises the following steps: and uniformly mixing water and sucrose monostearate, adding the silica aerogel and the epoxy resin emulsion, and uniformly mixing to form a silica aerogel suspension.
An architectural coating comprises the following components in parts by weight: 30 parts of organic silicon modified alkyd resin, 4 parts of kaolin, 6 parts of rare earth neodymium oxide, 4 parts of rare earth gadolinium oxide, 8 parts of silica aerogel suspension, 4 parts of nano titanium dioxide, 4 parts of nano magnesium aluminum silicate, 8 parts of silicone acrylic emulsion, 18 parts of modified medical stone powder, 4 parts of fumed silica, 3 parts of photocatalyst, 5 parts of activated carbon, 8 parts of seaweed powder, 3 parts of preservative and 50 parts of water;
a preparation method of an architectural coating specifically comprises the following steps:
s1, taking materials according to the proportion of the invention, mixing the organic silicon modified alkyd resin, the silicone-acrylate emulsion, the preservative and the water uniformly to obtain a solution A,
s2, ball-milling kaolin, nano titanium dioxide, rare earth neodymium oxide and rare earth gadolinium oxide, sieving by a 400-mesh sieve, adding the sieved powder into the solution A, and uniformly mixing to obtain a suspension B;
s3, adding modified medical stone powder, photocatalyst, activated carbon and seaweed powder into the suspension B to obtain a suspension C;
s4, adding nano magnesium aluminum silicate and fumed silica into the suspension C, and uniformly mixing to obtain slurry D;
and S5, adding the silica aerogel suspension into the slurry D, and uniformly dispersing to obtain the fireproof coating.
Comparative example 3
The preparation of the organic silicon modified alkyd resin comprises the following steps: the method comprises the steps of reacting linseed oil, pentaerythritol and a catalyst LiOH at 220-230 ℃ until the tolerance is 8, adding phthalic anhydride, heating to 230-240 ℃, reacting until the acid value reaches 14, cooling to 100-110 ℃ to obtain alkyd resin, adding No. 200 solvent oil and xylene into the alkyd resin, and uniformly mixing to obtain an alkyd resin solution; and adding hydroxyl siloxane (the content of the hydroxyl siloxane is 45 percent of that of the alkyd resin), taking tetraisopropyl titanate as a catalyst, heating to 125-135 ℃, reacting for 3 hours, and removing the solvent by using a rotary evaporator after the reaction is finished. In the invention: the content of the hydroxyl siloxane is 45 percent of that of the alkyd resin, and specifically, the weight of the added hydroxyl siloxane is 45 percent of that of the alkyd resin.
The silica aerogel suspension is a stable dispersion system formed by uniformly mixing 40 wt% of silica aerogel, 5 wt% of sucrose monostearate, 10 wt% of epoxy resin emulsion and 45 wt% of water; the preparation method comprises the following steps: and uniformly mixing water and sucrose monostearate, adding the silica aerogel and the epoxy resin emulsion, and uniformly mixing to form a silica aerogel suspension.
An architectural coating comprises the following components in parts by weight: 30 parts of organic silicon modified alkyd resin, 4 parts of kaolin, 6 parts of rare earth neodymium oxide, 4 parts of rare earth gadolinium oxide, 8 parts of silica aerogel suspension, 4 parts of nano titanium dioxide, 4 parts of nano magnesium aluminum silicate, 8 parts of silicone acrylic emulsion, 8 parts of medical stone powder, 5 parts of negative oxygen ion powder, 5 parts of tourmaline powder, 4 parts of fumed silica, 3 parts of photocatalyst, 5 parts of activated carbon, 8 parts of seaweed powder, 3 parts of preservative and 50 parts of water;
a preparation method of an architectural coating specifically comprises the following steps:
s1, taking materials according to the proportion of the invention, mixing the organic silicon modified alkyd resin, the silicone-acrylate emulsion, the preservative and the water uniformly to obtain a solution A,
s2, ball-milling kaolin, nano titanium dioxide, rare earth neodymium oxide and rare earth gadolinium oxide, sieving by a 400-mesh sieve, adding into the solution A, and mixing uniformly to obtain a suspension B;
s3, adding medical stone powder, negative oxygen ion powder, tourmaline powder, photocatalyst, activated carbon and seaweed powder into the suspension B to obtain a suspension C;
s4, adding nano magnesium aluminum silicate and fumed silica into the suspension C, and uniformly mixing to obtain slurry D;
and S5, adding the silica aerogel suspension into the slurry D, and uniformly dispersing to obtain the fireproof coating.
The test method comprises the following steps:
the heat conductivity coefficient is tested according to GB/T10294-; uniformly coating the coatings prepared in examples 1-3 and comparative examples 1-3, sealing for 48h, and detecting by using a negative oxygen ion detector; specific results are shown in table 1:
TABLE 1 test results of examples and comparative examples
Figure BDA0003752712790000121
The differences between comparative example 1 and example 1 are: comparative example 1 the negative ion powder and the tourmaline powder are directly added into the system without loading the negative oxygen ion powder and the tourmaline powder on the roasted medical stone, so that the ionization effect of the negative ion powder and the tourmaline powder on the air is influenced.
The difference between comparative example 2 and example 1 is: comparative example 2, in which the modified medical stone of the present invention was used, but no photocatalyst was loaded on the activated carbon, it can be seen from table 1 that comparative example 2 released a significantly lower amount of negative oxygen ions than comparative example 1, although it was higher in content than comparative example 1.
The difference between comparative example 3 and example 1 is: comparative example 3 neither the calcined medical stone loaded with negative oxygen ion powder or tourmaline powder nor the photocatalyst was loaded on the activated carbon, and only from table 1, the content of negative oxygen ions released in comparative example 3 was the worst.

Claims (5)

1. An architectural coating comprises the following components in parts by weight: 30-40 parts of organic silicon modified alkyd resin, 4-6 parts of kaolin, 4-6 parts of rare earth neodymium oxide, 4-6 parts of rare earth gadolinium oxide, 8-12 parts of silica aerogel suspension, 4-6 parts of nano titanium dioxide, 4-6 parts of nano magnesium aluminum silicate, 8-12 parts of silicone-acrylate emulsion, 18-22 parts of modified medical stone powder, 4-6 parts of fumed silica, 8-10 parts of photocatalyst modified activated carbon, 8-12 parts of seaweed powder, 3-6 parts of preservative and 50-60 parts of water;
the modified medical stone powder is prepared by the following steps:
1) firstly, 200-mesh medical stone powder is placed in a muffle furnace and roasted for 4-5 hours at the temperature of 500-600 ℃;
2) taking the following components in parts by weight: 15-20 parts of medical stone, 4-6 parts of negative oxygen ion powder of 400 meshes, 8-12 parts of tourmaline powder of 400 meshes and 80-100 parts of NaOH solution with the mass fraction of 2% -5% after roasting in the step 1), uniformly mixing the components, ultrasonically dispersing for 3-4 h, drying under natural conditions, then drying at 60-70 ℃ for 3-4 h, and roasting in a muffle furnace at 300-400 ℃ for 3-4 h to obtain modified medical stone powder;
the photocatalyst modified activated carbon is prepared by the following steps:
a) adding 4-6 parts by weight of 400-mesh photocatalyst powder into 40-50 parts by weight of water, uniformly mixing, and performing ultrasonic dispersion for 30-60 min to obtain a photocatalyst suspension;
b) and (2) taking 10-15 parts by weight of 200-mesh activated carbon, fully soaking in the photocatalyst suspension, ultrasonically dispersing for 2-3 h, drying under natural conditions, and drying at 100-120 ℃ for 3-5 h to obtain the photocatalyst modified activated carbon.
2. The architectural coating of claim 1, wherein: the preparation method of the organic silicon modified alkyd resin comprises the following steps: the method comprises the steps of reacting linseed oil, pentaerythritol and a catalyst LiOH at 220-230 ℃ until the tolerance is 8-12, adding phthalic anhydride, heating to 230-240 ℃, reacting until the acid value reaches 14-16, cooling to 100-110 ℃ to obtain alkyd resin, adding No. 200 solvent oil and xylene into the alkyd resin, and uniformly mixing to obtain an alkyd resin solution; then adding hydroxyl siloxane, taking tetraisopropyl titanate as a catalyst, heating to 125-135 ℃, reacting for 3-4 h, and removing the solvent after the reaction is finished; wherein the content of the hydroxyl siloxane is 45-50% of that of the alkyd resin.
3. The architectural coating of claim 2, wherein: the preparation method of the organic silicon modified alkyd resin comprises the following steps: linseed oil, pentaerythritol and a catalyst LiOH are reacted at 220 ℃ until the tolerance is 8-10, phthalic anhydride is added, then the temperature is raised to 230 ℃, the reaction is carried out until the acid value reaches 14-15, the temperature is lowered to 100 ℃ to obtain alkyd resin, No. 200 solvent oil and xylene are added into the alkyd resin, and the alkyd resin solution is obtained after uniform mixing; adding hydroxyl siloxane, taking tetraisopropyl titanate as a catalyst, heating to 130 ℃, reacting for 3-4 h, and removing the solvent after the reaction is finished; wherein the content of the hydroxyl siloxane is 45-48% of that of the alkyd resin.
4. The architectural coating of claim 3, wherein: the silica aerogel suspension is a stable dispersion system formed by uniformly mixing 40 wt% of silica aerogel, 5 wt% of sucrose monostearate, 10 wt% of epoxy resin emulsion and 45 wt% of water.
5. A preparation method of building paint is characterized in that: the method comprises the following steps:
s1, taking the materials according to the proportion of the building coating of claim 4, mixing the organic silicon modified alkyd resin, the silicone-acrylate emulsion, the preservative and the water uniformly to obtain a solution A,
s2, ball-milling kaolin, nano titanium dioxide, rare earth neodymium oxide and rare earth gadolinium oxide, sieving by a 400-mesh sieve, adding the sieved powder into the solution A, and uniformly mixing to obtain a suspension B;
s3, adding modified medical stone powder, photocatalyst modified activated carbon and seaweed powder into the suspension B to obtain a suspension C;
s4, adding nano magnesium aluminum silicate and fumed silica into the suspension C, and uniformly mixing to obtain slurry D;
and S5, adding the silica aerogel suspension into the slurry D, and uniformly dispersing to obtain the fireproof coating.
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