CN115093754B - Multifunctional composite reflective cooling coating and preparation method thereof - Google Patents
Multifunctional composite reflective cooling coating and preparation method thereof Download PDFInfo
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- 238000000576 coating method Methods 0.000 title claims abstract description 112
- 239000011248 coating agent Substances 0.000 title claims abstract description 109
- 239000002131 composite material Substances 0.000 title claims abstract description 63
- 238000001816 cooling Methods 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title claims description 14
- 239000000843 powder Substances 0.000 claims abstract description 79
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000000839 emulsion Substances 0.000 claims abstract description 51
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000004575 stone Substances 0.000 claims abstract description 32
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 26
- 239000000919 ceramic Substances 0.000 claims abstract description 24
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 claims abstract description 20
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 19
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000011575 calcium Substances 0.000 claims abstract description 19
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000003755 preservative agent Substances 0.000 claims abstract description 16
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- 239000013530 defoamer Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims description 51
- 239000007787 solid Substances 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 11
- 239000002518 antifoaming agent Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 38
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- 238000004140 cleaning Methods 0.000 abstract description 14
- 239000003513 alkali Substances 0.000 abstract description 10
- 239000002253 acid Substances 0.000 abstract description 9
- 238000004887 air purification Methods 0.000 abstract description 2
- 239000011247 coating layer Substances 0.000 abstract 1
- 239000011941 photocatalyst Substances 0.000 description 15
- 150000001450 anions Chemical class 0.000 description 13
- 150000002500 ions Chemical class 0.000 description 10
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- 238000000034 method Methods 0.000 description 6
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 5
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- 229910052761 rare earth metal Inorganic materials 0.000 description 3
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- 239000002994 raw material Substances 0.000 description 3
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- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
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- 230000000670 limiting effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 230000002035 prolonged effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/04—Homopolymers or copolymers of ethene
- C09D123/08—Copolymers of ethene
- C09D123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09D123/0869—Acids or derivatives thereof
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/004—Reflecting paints; Signal paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/45—Anti-settling agents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/67—Particle size smaller than 100 nm
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/68—Particle size between 100-1000 nm
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- 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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- 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
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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Abstract
The invention relates to a multifunctional composite reflective cooling coating which comprises the following components in parts by weight: 15-20 parts of nano modified silicone-acrylic emulsion, 25-30 parts of ethylene-acrylic acid copolymer emulsion, 6-12 parts of composite titanium dioxide, 6-8 parts of zinc oxide powder, 5-8 parts of hexacyclic stone powder, 3-5 parts of gray calcium, 3-5 parts of potassium feldspar powder, 0.5-1 part of platinum-containing ceramic powder, 0.5-1 part of wetting dispersant, 0.5-1 part of defoamer, 0.1-0.3 part of film forming additive, 0.1-0.3 part of preservative, 0.1-0.15 part of anti-settling agent, 0.03-0.05 part of pH regulator and the balance of water. The invention improves the radiation cooling effect of the coating, the coating has multiple functions of water resistance, mildew resistance, acid and alkali resistance, air purification and the like, and simultaneously improves the thickness, self-cleaning property, weather resistance and service life of the coating, thereby solving the problems of single function, poor radiation cooling capability, thick coating layer, uncooled service life of the coating, poor self-cleaning property and weather resistance and the like of the existing reflective heat-insulating coating.
Description
Technical Field
The invention relates to the technical field of chemical coatings, in particular to a multifunctional composite reflective cooling coating and a preparation method thereof.
Background
With the strong promotion of green construction in China, the material technology related to reflection heat insulation has made great progress in recent years, but the problems of inconsistent service life of multiple coatings, poor self-cleaning property of the coatings, poor weather resistance, weak radiation capability and the like still exist in practical application. Besides, the existing reflective heat-insulating coating has the multifunctional requirements of water resistance, mildew resistance, acid and alkali resistance and environment purification besides the reflective heat-insulating performance.
In addition, the heat insulation mechanism adopted by the existing reflective heat insulation coating is still single, for example: in middle coating construction, a barrier type reflective heat insulation mechanism is generally adopted, and a hollow structure low heat conduction material such as hollow glass beads and hollow ceramics is added to block heat transfer, so that the heat storage barrier effect is achieved, the construction thickness is high, and the problems of poor crack resistance, short service life, poor durability, waterproof property, poor self-cleaning property and the like of a coating system are caused. Another example is: the reflective heat-insulating surface coating is mainly based on a heat-insulating mechanism of reflection and radiation, the radiation capacity is often influenced by environment, heat radiation can only radiate from high to low, and the heat radiation is only radiated in the forms of low ambient temperature, air convection and the like, so that the heat radiation efficiency is low, the heat accumulation of the coating is excessive, and the indoor temperature is improved.
Therefore, the reflective heat-insulating coating on the market at present cannot meet the increasingly diverse user demands, so that the multifunctional composite reflective cooling coating is required to be pushed out, and the multifunctional marketization application and popularization of the coating are promoted.
Disclosure of Invention
The invention aims to provide a multifunctional cooling coating with waterproof, mildew-resistant, acid-alkali-resistant and greatly improved coating reflection and radiation effects and a preparation method thereof, and meanwhile, the thickness, self-cleaning property, weather resistance and service life of the coating are greatly improved, so that the problems of single function, poor radiation cooling capability, excessive thickness of the coating, uncooled service life of the coating, poor self-cleaning property and weather resistance and the like of the conventional reflective heat-insulating coating are solved.
In order to achieve the above purpose, the invention provides a multifunctional composite reflective cooling coating, which is characterized in that: comprises the following components in parts by weight: 15-20 parts of nano modified silicone-acrylic emulsion, 25-30 parts of ethylene-acrylic acid copolymer emulsion, 6-12 parts of composite titanium dioxide, 6-8 parts of zinc oxide powder, 5-8 parts of hexacyclic stone powder, 3-5 parts of gray calcium, 3-5 parts of potassium feldspar powder, 0.5-1 part of platinum-containing ceramic powder, 0.5-1 part of wetting dispersant, 0.5-1 part of defoamer, 0.1-0.3 part of film forming additive, 0.1-0.3 part of preservative, 0.1-0.15 part of anti-settling agent, 0.03-0.05 part of pH regulator and the balance of water.
Preferably, the nano modified silicone-acrylic emulsion is nano titanium dioxide/silicone-acrylic composite emulsion, the solid content is 45-49%, and the solid content of the ethylene-acrylic acid copolymer emulsion is 42-45%.
Preferably, the composite titanium dioxide is rutile titanium dioxide and anatase titanium dioxide according to the following formula 1: mixing in proportion of 1.
Preferably, the particle size of the composite titanium dioxide and zinc oxide powder is smaller than 100nm.
Preferably, the grain size of the hexacyclic stone powder, the gray calcium powder, the potassium feldspar powder and the platinum-containing ceramic powder is smaller than 200nm.
The invention further aims at providing a preparation method of the multifunctional composite reflective cooling coating, which is characterized by comprising the following steps of: the method comprises the following steps:
s1, uniformly stirring a wetting dispersant, a preservative, an anti-settling agent, a pH regulator and water to obtain a solution A;
s2, sequentially adding nano modified silicone-acrylate emulsion, gray calcium, composite titanium dioxide, zinc oxide powder, hexacyclic stone powder, potassium feldspar powder and platinum-containing ceramic powder into the ethylene-acrylic acid copolymer emulsion, and uniformly stirring to obtain a solution B;
and S3, sequentially adding a film forming additive, the solution A and the defoaming agent into the solution B, and uniformly stirring to obtain the multifunctional composite type reflective cooling coating.
Preferably, in the step S1, the stirring speed is 300-500 r/min, the stirring time is 20min, and the temperature is controlled at 25-35 ℃.
Preferably, in the step S2, the stirring speed is 1800-2000 r/min, the stirring time is 30min, and the temperature is controlled at 40-60 ℃.
Preferably, in the step S3, the stirring speed is 900-1200 r/min, the stirring time is 45min, and the temperature is controlled at 50-70 ℃.
Based on the technical scheme, the invention has the advantages that: according to the invention, hexacyclic stone powder is used and is manually compounded according to the components of the hexacyclic stone powder, and then the hexacyclic stone powder is introduced into the reflective cooling coating, and is uniformly dispersed in the reflective cooling coating after formulation improvement. The invention promotes the paint to have the function of releasing anions by simulating the action mechanism of hexacyclic stone powder, and the paint has the photocatalyst effect by modifying emulsion and introducing a catalyst, thereby greatly improving the radiation cooling, mildew resistance, acid and alkali resistance, weather resistance and self-cleaning performance of the paint, and the specific performances are as follows:
1. the two emulsions in the invention have good compatibility, and after composite use, the waterproof, anti-cracking and photo-catalytic effects are stable, so that the coating has the functions of cracking resistance, water resistance, reflective heat insulation, photo-catalytic, acid and alkali resistance and the like, and the coating is smooth, has good adhesive force and good ultraviolet shielding effect.
2. The invention uses natural hexacyclic stone powder, realizes multiple functions of sunlight reflection, ultraviolet ray absorption sterilization, anion purification and mildew resistance, coating heat dissipation enhancement and atmospheric window radiation heat, and has high far infrared radiation rate.
3. The invention is limited by cost factors of natural hexacyclic stone powder, uses various low-cost fillers to simulate the hexacyclic stone components and efficacy, enhances the effect of generating anions and the capability of emitting far infrared rays of the coating while improving the waterproof and reflective cooling effects, has high far infrared emissivity, adopts platinum-containing ceramic powder as a catalyst, avoids the use of rare earth and the like, greatly reduces radioactivity, and ensures the use safety and economy.
4. The photocatalyst effect and the negative ion purifying effect of the coating have the functions of dust fall, bacteriostasis, sterilization and deodorization, and the negative ion layer generated by the coating can effectively resist the erosion of acid rain, factory salt fog and the like on the coating, so that the coating is particularly suitable for places such as garbage stations, industrial plants, coastal buildings and the like.
5. The self-cleaning property, weather resistance and service life of the coating are greatly improved, the used raw materials and auxiliary materials are all in nano level, the single construction thickness is only 30-50 mu m, the coating is thin and smooth, the surface of the coating is not easy to stain, the self-cleaning of the coating can be realized only by natural force, and meanwhile, the coating has better weather resistance and greatly improved service life due to the multiple effects of ultraviolet resistance, water resistance and negative ion purification and mildew resistance.
6. The paint has stable performance, uses the anti-settling agent, has more stable system, can enhance the application period by the photocatalyst and anion effect of the paint, and realizes long-term storage.
Detailed Description
The following further details of the technical solution of the present invention are provided by way of examples, and it is apparent that the described examples are only some, but not all, of the examples of the present invention, and all other examples obtained by those skilled in the art without creative efforts are included in the protection scope of the present invention based on the examples of the present invention.
The reagents used in the present invention are all common in the art unless otherwise specified, and the methods used in the present invention are all common in the art unless otherwise specified.
The invention provides a multifunctional composite reflective cooling coating technical scheme: comprises the following components in parts by weight: 15-20 parts of nano modified silicone-acrylic emulsion, 25-30 parts of ethylene-acrylic acid copolymer emulsion, 6-12 parts of composite titanium dioxide, 6-8 parts of zinc oxide powder, 5-8 parts of hexacyclic stone powder, 3-5 parts of gray calcium, 3-5 parts of potassium feldspar powder, 0.5-1 part of platinum-containing ceramic powder, 0.5-1 part of wetting dispersant, 0.5-1 part of defoamer, 0.1-0.3 part of film forming additive, 0.1-0.3 part of preservative, 0.1-0.15 part of anti-settling agent, 0.03-0.05 part of pH regulator and the balance of water.
Preferably, the nano modified silicone-acrylic emulsion is nano titanium dioxide/silicone-acrylic composite emulsion, the solid content is 45-49%, and the solid content of the ethylene-acrylic acid copolymer emulsion is 42-45%.
The photocatalyst, waterproof and anti-cracking effects of the product can be ensured due to the fact that the two emulsions are high in solid content, the silicon-acrylic composite emulsion modified by nano titanium dioxide has the effect of the photocatalyst besides the advantages of water resistance, acid and alkali resistance, stain resistance, ultraviolet resistance and non-yellowing of a coating film, under the irradiation of sunlight, the platinum-containing ceramic powder is used as a catalytic medium, the coating can perform photocatalytic reaction, and substances such as VOCs and bacteria are catalytically decomposed by utilizing solar energy, so that the coating has an ultraviolet shielding effect of 200-400 nm.
The ethylene-acrylic acid copolymer emulsion has good adhesive force with various substrate materials, good elasticity, smooth coating and good waterproof effect, and ensures the cracking resistance and the waterproof performance of the coating. The two emulsions have good compatibility, and after composite use, the waterproof, anti-cracking and photo-catalyst effects are stable, so that the coating has the functions of cracking resistance, waterproofing, reflective heat insulation, photo-catalyst air purification, acid and alkali resistance and the like.
Preferably, the composite titanium dioxide is rutile titanium dioxide and anatase titanium dioxide according to the following formula 1: mixing in proportion of 1.
The rutile type titanium dioxide has high refractive index and reflectivity, can effectively reflect sunlight, improves the weather resistance of the coating, has the characteristics of strong covering power and high tinting strength, is a photoactivation site on the surface of the anatase type titanium dioxide, is an essential raw material for purifying air and coating by photocatalyst, and combines the excellent characteristics of nano titanium dioxide/silicone-acrylate composite emulsion by compounding, so that the coating has the functions of resisting ultraviolet rays and purifying air by photocatalyst, and avoids phenomena of light loss, yellowing and chalking.
Preferably, the particle size of the composite titanium dioxide and zinc oxide powder is smaller than 100nm.
The nanometer titanium dioxide and zinc oxide powder are effectively guaranteed in reflection and temperature reduction, supplement each other, perform thermal diffuse reflection on ultraviolet rays, have good reflection and scattering effects on infrared electromagnetic waves radiated from all directions, can reflect near infrared electromagnetic waves with shorter wavelength, higher frequency and larger energy in incident electromagnetic waves, greatly improve solar reflectance, hemispherical emissivity and far infrared radiation rate of the coating, enable the solar reflectance and hemispherical emissivity to be more than 0.90, and enable the infrared radiation coefficient of 8-15 um to be 0.92.
Preferably, the grain size of the hexacyclic stone powder, the gray calcium powder, the potassium feldspar powder and the platinum-containing ceramic powder is smaller than 200nm.
The nano-level natural hexacyclic stone powder stone can permanently generate anions, and the existence of the anions can kill bacteria, purify air, ensure the mildew-proof effect of the coating, and generate H in the molecular thermal motion and bacteria and VOCs killing processes of the anions generated by the coating 2 O and CO 2 The heat accumulated by the coating is taken away effectivelyAnd the radiation heat dissipation effect is greatly enhanced.
Meanwhile, the hexacyclic ring stone powder can generate far infrared rays with the wavelength of 8-15 um at 20 ℃, and the infrared rays of the wave band are not absorbed by the atmosphere, so that heat can be directly radiated to space, the radiation cooling effect of a coating is further improved, the radiation cooling way is increased, the radiation cooling way can radiate heat to the surrounding environment and also radiate heat to the outer space, the influence of the surrounding environment on the radiation cooling effect is avoided, and the multiple functions of reflecting sunlight, absorbing ultraviolet sterilization, purifying and preventing mildew by negative ions, enhancing the radiation of the coating and radiating heat of the air window are realized.
The cost factor of the composite material is limited to natural hexacyclic stone powder, hexacyclic stone powder is used as an initiator, nanoscale composite titanium dioxide, zinc oxide powder, gray calcium and potassium feldspar powder are used, the platinum-containing ceramic powder is compounded to simulate the components and the effects of the hexacyclic stone, the waterproof and reflective cooling effects of the material are improved, the negative ion generating effect and the far infrared ray emitting capability of the coating are enhanced, the platinum-containing ceramic powder is used as a catalyst, the use of rare earth and the like is avoided, the radioactivity is greatly reduced, and the use safety is ensured.
The used filler is nano-scale, so that the coating oil is bright and smooth, the surface of the coating oil is strong in stain resistance and hydrophilic and self-cleaning, the coating is not sticky back and is not easy to adhere to dust and the like under the conditions of insolation and high temperature weather, the self-cleaning of the coating can be realized by natural forces such as wind, rain and the like in daily life, meanwhile, the photocatalyst and negative ion of the coating are used for purifying, in the purifying process, the surface of the coating is equivalent to a layer of protective film, and H generated by purifying is equivalent to that of the coating 2 O and CO 2 And the retention of dirt can be reduced while heat is taken away.
The invention also provides a preparation method of the multifunctional composite reflective cooling coating, which comprises the following steps:
s1, uniformly stirring a wetting dispersant, a preservative, an anti-settling agent, a pH regulator and water to obtain a solution A;
s2, sequentially adding nano modified silicone-acrylate emulsion, gray calcium, composite titanium dioxide, zinc oxide powder, hexacyclic stone powder, potassium feldspar powder and platinum-containing ceramic powder into the ethylene-acrylic acid copolymer emulsion, and uniformly stirring to obtain a solution B;
and S3, sequentially adding a film forming additive, the solution A and the defoaming agent into the solution B, and uniformly stirring to obtain the multifunctional composite type reflective cooling coating.
Preferably, in the step S1, the stirring speed is 300-500 r/min, the stirring time is 20min, and the temperature is controlled at 25-35 ℃. The low-speed stirring enhances the dissolution effect of the wetting dispersant, the preservative and the anti-settling agent.
Preferably, in the step S2, the stirring speed is 1800-2000 r/min, the stirring time is 30min, and the temperature is controlled at 40-60 ℃. The emulsion and the filler are mixed at the stage, the consistency is high, the emulsion and the filler can be uniformly mixed by using a high-speed dispersing method, the heat generated by high-speed rotation and filler friction is high, the temperature is required to be controlled, and the stability of the coating is prevented from being reduced.
Preferably, in the step S3, the stirring speed is 900-1200 r/min, the stirring time is 45min, and the temperature is controlled at 50-70 ℃. The stirring speed is reduced to 900-1200 r/min, so that the failure of preservative, defoamer and film-forming auxiliary agent can be prevented, the stirring time is prolonged to 45min, uniform mixing is fully realized, and the product quality is ensured.
The invention has the technical effects that:
according to the invention, hexacyclic stone powder is used and is manually compounded according to the components of the hexacyclic stone powder, and then is introduced into the reflective cooling coating, and the reflective cooling coating is uniformly dispersed therein through formulation improvement. The invention promotes the paint to have the function of releasing anions by simulating the action mechanism of hexacyclic stone powder, thereby improving the functions of mildew resistance, acid and alkali resistance, weather resistance and self-cleaning property of the paint, and the concrete performance is as follows:
1. the invention uses nano titanium dioxide/silicon acrylic composite emulsion and ethylene-acrylic acid copolymer emulsion, wherein the silicon acrylic composite emulsion modified by nano titanium dioxide has the advantages of water resistance, acid and alkali resistance, stain resistance, ultraviolet resistance and non-yellowing coating film, and also has the effect of photocatalyst. The ethylene-acrylic acid copolymer emulsion has good adhesive force with various substrate materials, good elasticity, smooth coating and good waterproof effect, and ensures the cracking resistance and the waterproof performance of the coating. After the two emulsions are used in a compounding way with good compatibility, the waterproof and anti-cracking effects and the photocatalyst effects are stable, so that the coating has the functions of cracking resistance, waterproofing, reflecting heat insulation, photocatalyst, acid and alkali resistance and the like.
2. The natural hexacyclic stone powder is used in the formula, the hexacyclic stone can permanently generate anions, bacteria can be killed by the existence of the anions, air is purified, the mildew-proof effect of the coating is ensured, and H is generated in the process of molecular thermal motion and bacteria and VOCs killing by the anions generated by the coating 2 O and CO 2 The heat accumulated by the coating is taken away, so that heat is effectively dissipated; meanwhile, the hexacyclic ring stone powder can generate far infrared rays with the wavelength of 8-15 um at 20 ℃, and the infrared rays in the wave band are not absorbed by the atmosphere, so that heat can be directly radiated to space, the radiation cooling effect is greatly improved, the influence of the surrounding environment on radiation cooling is avoided, and the multiple functions of reflecting sunlight, absorbing ultraviolet rays for sterilization, purifying and preventing mildew by negative ions, enhancing the heat dissipation of a coating and the radiation heat of the air window are realized.
3. The invention is limited to the cost factor of natural hexacyclic stone powder, uses hexacyclic stone powder as an initiator, and uses composite titanium dioxide, zinc oxide powder, gray calcium and potassium feldspar powder, and platinum-containing ceramic powder is compounded to simulate the components and the effects of the hexacyclic stone, so that the waterproof, reflective and cooling effects of the materials are improved, the negative ion generating effect and the far infrared ray emitting capability of the materials are enhanced, the platinum-containing ceramic powder is used as a catalyst, the use of rare earth and other materials is avoided, the radioactivity is greatly reduced, and the use safety is ensured.
4. The photocatalyst effect and the negative ion purifying effect of the coating have the functions of dust fall, bacteriostasis, sterilization and deodorization, and the negative ion layer generated by the coating can effectively resist the erosion of acid rain, factory salt fog and the like on the coating, so that the coating is particularly suitable for places such as garbage stations, industrial plants, coastal buildings and the like.
5. The self-cleaning property, weather resistance and service life of the coating are greatly improved, and the used raw materials and auxiliary materials are all in nanometer level, so that the single construction thickness is only 30-50 microns, the coating is thin, the coating is smooth, the surface of the coating is not easy to stain, the self-cleaning of the coating can be realized only by natural force, and meanwhile, the coating has good weather resistance and service life due to the multiple effects of ultraviolet resistance, water resistance, purification, mildew resistance of the anion layer and the like.
6. The paint has stable performance, uses the anti-settling agent, has more stable system, can enhance the application period by the photocatalyst and anion effect of the paint, and realizes long-term storage.
Example 1
A preparation method of a multifunctional composite reflective cooling coating comprises the following steps:
s1, mixing 0.5 part of wetting dispersant, 0.1 part of preservative, 0.15 part of anti-settling agent, 0.03 part of pH regulator and 20.62 parts of water, and stirring at a temperature of 25 ℃ at a rotating speed of 300r/min for 20min to obtain solution A;
s2, sequentially adding 15 parts of nano modified silicone-acrylic emulsion with the solid content of 45 percent, 3 parts of gray calcium, 12 parts of composite titanium dioxide, 6 parts of zinc oxide powder, 8 parts of hexacyclic powder, 3 parts of potassium feldspar powder and 0.5 part of platinum-containing ceramic powder into 30 parts of ethylene-acrylic acid copolymer emulsion with the solid content of 42 percent, and stirring at the temperature of 40 ℃ for 30 minutes at the speed of 1800r/min to obtain a solution B;
s3, sequentially adding 0.1 part of film forming additive, solution A and 1 part of defoamer into the solution B, and stirring at the speed of 900r/min for 45min at the temperature of 50 ℃ to obtain the multifunctional composite type reflective cooling coating.
Example 2
A preparation method of a multifunctional composite reflective cooling coating comprises the following steps:
s1, mixing 1 part of wetting dispersant, 0.3 part of preservative, 0.1 part of anti-settling agent, 0.05 part of pH regulator and 22.75 parts of water, and stirring at 25 ℃ for 20min at a rotating speed of 500r/min to obtain solution A;
s2, sequentially adding 20 parts of nano modified silicone-acrylic emulsion with the solid content of 49%, 5 parts of gray calcium, 6 parts of composite titanium dioxide, 8 parts of zinc oxide powder, 5 parts of hexacyclic powder, 5 parts of potassium feldspar powder and 1 part of platinum-containing ceramic powder into 25 parts of ethylene-acrylic acid copolymer emulsion with the solid content of 42%, and stirring at the temperature of 40 ℃ at the speed of 2000r/min for 30min to obtain a solution B;
s3, sequentially adding 0.3 part of film forming additive, 0.5 part of defoaming agent and solution A into the solution B, and stirring at the speed of 1200r/min for 45min at the temperature of 50 ℃ to obtain the multifunctional composite type reflective cooling coating.
Example 3
A preparation method of a multifunctional composite reflective cooling coating comprises the following steps:
s1, mixing 0.7 part of wetting dispersant, 0.2 part of preservative, 0.15 part of anti-settling agent, 0.04 part of pH regulator and 24.11 parts of water, and stirring at 35 ℃ for 20min at a rotating speed of 300r/min to obtain solution A;
s2, sequentially adding 16 parts of nano modified silicone-acrylic emulsion with the solid content of 45%, 4 parts of gray calcium, 8 parts of composite titanium dioxide, 7 parts of zinc oxide powder, 6 parts of hexacyclic powder, 4 parts of potassium feldspar powder and 0.8 part of platinum-containing ceramic powder into 28 parts of ethylene-acrylic acid copolymer emulsion with the solid content of 45%, and stirring at 60 ℃ for 30min at the speed of 2000r/min to obtain a solution B;
s3, sequentially adding 0.2 part of film forming additive, 0.8 part of defoaming agent and solution A into the solution B, and stirring at the speed of 1200r/min for 45min at the temperature of 70 ℃ to obtain the multifunctional composite type reflective cooling coating.
Example 4
A preparation method of a multifunctional composite reflective cooling coating comprises the following steps:
s1, mixing 0.5 part of wetting dispersant, 0.1 part of preservative, 0.1 part of anti-settling agent, 0.03 part of pH regulator and 35.17 parts of water, and stirring at 35 ℃ for 20min at a rotating speed of 500r/min to obtain solution A;
s2, sequentially adding 15 parts of nano modified silicone-acrylic emulsion with the solid content of 49%, 3 parts of gray calcium, 6 parts of composite titanium dioxide, 6 parts of zinc oxide powder, 5 parts of hexacyclic powder, 3 parts of potassium feldspar powder and 0.5 part of platinum-containing ceramic powder into 25 parts of ethylene-acrylic acid copolymer emulsion with the solid content of 45%, and stirring at the temperature of 60 ℃ for 30min at the speed of 1800r/min to obtain a solution B;
s3, sequentially adding 0.1 part of film forming additive, 0.5 part of defoaming agent and solution A into the solution B, and stirring at the speed of 900r/min for 45min at the temperature of 70 ℃ to obtain the multifunctional composite type reflective cooling coating.
Example 5
A preparation method of a multifunctional composite reflective cooling coating comprises the following steps:
s1, mixing 1 part of wetting dispersant, 0.3 part of preservative, 0.15 part of anti-settling agent, 0.05 part of pH regulator and 8.2 parts of water, and stirring at 30 ℃ for 20min at a rotation speed of 400r/min to obtain solution A;
s2, sequentially adding 20 parts of nano modified silicone-acrylic emulsion with the solid content of 48%, 5 parts of gray calcium, 12 parts of composite titanium dioxide, 8 parts of zinc oxide powder, 8 parts of hexacyclic powder, 5 parts of potassium feldspar powder and 1 part of platinum-containing ceramic powder into 30 parts of ethylene-acrylic acid copolymer emulsion with the solid content of 43%, and stirring at the temperature of 50 ℃ at the speed of 1900r/min for 30min to obtain a solution B;
s3, sequentially adding 0.3 part of film forming additive, solution A and 1 part of defoamer into the solution B, and stirring at the speed of 1100r/min for 45min at the temperature of 60 ℃ to obtain the multifunctional composite type reflective cooling coating.
Example 6
A preparation method of a multifunctional composite reflective cooling coating comprises the following steps:
s1, mixing 1 part of wetting dispersant, 0.3 part of preservative, 0.15 part of anti-settling agent, 0.05 part of pH regulator and 33.7 parts of water, and stirring at 30 ℃ for 20min at a rotating speed of 500r/min to obtain solution A;
s2, sequentially adding 15 parts of nano modified silicone-acrylic emulsion with the solid content of 47%, 3 parts of gray calcium, 6 parts of composite titanium dioxide, 6 parts of zinc oxide powder, 5 parts of hexacyclic powder, 3 parts of potassium feldspar powder and 0.5 part of platinum-containing ceramic powder into 25 parts of ethylene-acrylic acid copolymer emulsion with the solid content of 44%, and stirring at the temperature of 50 ℃ for 30min at the speed of 1800r/min to obtain a solution B;
s3, sequentially adding 0.3 part of film forming additive, solution A and 1 part of defoamer into the solution B, and stirring at the speed of 900r/min for 45min at the temperature of 60 ℃ to obtain the multifunctional composite type reflective cooling coating.
Example 7
A preparation method of a multifunctional composite reflective cooling coating comprises the following steps:
s1, mixing 0.5 part of wetting dispersant, 0.1 part of preservative, 0.1 part of anti-settling agent, 0.03 part of pH regulator and 9.67 parts of water, and stirring at 30 ℃ for 20min at a rotating speed of 300r/min to obtain solution A;
s2, sequentially adding 20 parts of nano modified silicone-acrylic emulsion with the solid content of 46 percent, 5 parts of gray calcium, 12 parts of composite titanium dioxide, 8 parts of zinc oxide powder, 8 parts of hexacyclic powder, 5 parts of potassium feldspar powder and 1 part of platinum-containing ceramic powder into 30 parts of ethylene-acrylic acid copolymer emulsion with the solid content of 44 percent, and stirring at the temperature of 50 ℃ for 30 minutes at the speed of 2000r/min to obtain a solution B;
s3, sequentially adding 0.1 part of film forming additive, 0.5 part of defoaming agent and solution A into the solution B, and stirring at the speed of 1200r/min for 45min at the temperature of 60 ℃ to obtain the multifunctional composite type reflective cooling coating.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present invention and are not limiting; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (5)
1. A multifunctional composite reflective cooling coating is characterized in that: comprises the following components in parts by weight: 15-20 parts of nano modified silicone-acrylic emulsion, 25-30 parts of ethylene-acrylic acid copolymer emulsion, 6-12 parts of composite titanium dioxide, 6-8 parts of zinc oxide powder, 5-8 parts of hexacyclic stone powder, 3-5 parts of gray calcium, 3-5 parts of potassium feldspar powder, 0.5-1 part of platinum-containing ceramic powder, 0.5-1 part of wetting dispersant, 0.5-1 part of defoamer, 0.1-0.3 part of film forming additive, 0.1-0.3 part of preservative, 0.1-0.15 part of anti-settling agent, 0.03-0.05 part of pH regulator and the balance of water;
the particle size of the composite titanium dioxide and zinc oxide powder is smaller than 100nm;
the composite titanium dioxide is rutile titanium dioxide and anatase titanium dioxide according to the following weight ratio of 1: mixing in proportion of 1;
the grain diameter of the hexacyclic stone powder, the gray calcium powder, the potassium feldspar powder and the platinum-containing ceramic powder is smaller than 200nm;
the preparation method comprises the following steps:
s1, uniformly stirring a wetting dispersant, a preservative, an anti-settling agent, a pH regulator and water to obtain a solution A;
s2, sequentially adding nano modified silicone-acrylate emulsion, gray calcium, composite titanium dioxide, zinc oxide powder, hexacyclic stone powder, potassium feldspar powder and platinum-containing ceramic powder into the ethylene-acrylic acid copolymer emulsion, and uniformly stirring to obtain a solution B;
and S3, sequentially adding a film forming additive, the solution A and the defoaming agent into the solution B, and uniformly stirring to obtain the multifunctional composite type reflective cooling coating.
2. The multifunctional composite reflective cooling coating according to claim 1, wherein: the nanometer modified silicone-acrylic emulsion is nanometer titanium dioxide/silicone-acrylic composite emulsion, the solid content is 45-49%, and the solid content of the ethylene-acrylic acid copolymer emulsion is 42-45%.
3. The multifunctional composite reflective cooling coating according to claim 1, wherein: in the step S1, the stirring speed is 300-500 r/min, the stirring time is 20min, and the temperature is controlled at 25-35 ℃.
4. The multifunctional composite reflective cooling coating according to claim 1, wherein: in the step S2, the stirring speed is 1800-2000 r/min, the stirring time is 30min, and the temperature is controlled at 40-60 ℃.
5. The multifunctional composite reflective cooling coating according to claim 1, wherein: in the step S3, the stirring speed is 900-1200 r/min, the stirring time is 45min, and the temperature is controlled at 50-70 ℃.
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