CN113549361B - High-molecular composite coating material with high reflectivity to sunlight - Google Patents
High-molecular composite coating material with high reflectivity to sunlight Download PDFInfo
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- CN113549361B CN113549361B CN202110708353.7A CN202110708353A CN113549361B CN 113549361 B CN113549361 B CN 113549361B CN 202110708353 A CN202110708353 A CN 202110708353A CN 113549361 B CN113549361 B CN 113549361B
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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
- C09D5/004—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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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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
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention relates to a high polymer composite coating material with high reflectivity to sunlight, which comprises a surface coating and an inner coating, wherein the surface coating comprises the following components in percentage by mass: 75-82% of acrylic resin, 18-24% of surface coating curing agent, 0.2-0.5% of nano indium tin oxide and 1.0-1.8% of surface coating auxiliary agent; the inner coating comprises the following components in percentage by mass: 45-48% of polyester resin, 4.2-4.6% of inner coating curing agent, 20-47% of titanium dioxide, 0-25% of precipitated barium sulfate, 0.6-3% of inner coating auxiliary agent and 0-3% of pigment. The high-molecular composite coating material with high reflectivity to sunlight is prepared by high-voltage electrostatic coating, firstly spraying the inner coating, precuring at 180 ℃/5min, then spraying the inner coating, and then curing and forming at 200 ℃/10min, has no VOC emission in the construction process, belongs to an environment-friendly product, and can customize the appearances of various textures according to market demands.
Description
Technical Field
The invention relates to the technical field of chemical coatings, in particular to a high-molecular composite coating material with high reflectivity to sunlight.
Background
With the development of network and communication industries, the total number of nationwide mobile communication base stations reaches 931 ten thousand, and the total number of 4G base stations increases by 90 thousand all the year in 2020, wherein the total number of the 4G base stations reaches 575 ten thousand, and deep coverage is realized in town areas. The 5G network construction is steadily advanced, according to the moderate advance principle, more than 60 thousands of newly-built 5G base stations are established, and more than 71.8 thousands of 5G base stations are completely opened. The main buildings of the base station are a simple color steel machine room and a cement concrete machine room, but most base stations only depend on an outdoor integrated cabinet to work.
The base station equipment works continuously for 24 hours without intermission, a large amount of heat is generated in the operation process, and the safe operation temperature range of the electronic equipment is 25-35 ℃. In hot summer, the base station equipment is exposed to the sun, and the inside temperature can rise fast, and for guaranteeing the normal operating of base station equipment, the base station computer lab needs to use the air conditioner to carry out temperature regulation. The air conditioner belongs to passive cooling and needs to consume electric power to play a role. In the service electric energy consumption of China mobile, the energy consumption of the base station accounts for 73 percent, the energy consumption of the base station air conditioner accounts for 46 percent of the total energy consumption of the base station, and the annual energy consumption is as high as more than 100 hundred million degrees.
The sunlight irradiation can raise the internal temperature of the outdoor base station, because the outdoor base station absorbs solar radiation in a large amount, 99.9% of the energy in the solar radiation is concentrated in an infrared region, a visible light region and an ultraviolet region (the energy distribution of the solar radiation is shown in table one), wherein the energy is mainly concentrated in the visible light and infrared parts, and the percentage is 93%.
Table one: energy of solar radiation
| Ultraviolet ray | Visible light | Infrared ray | |
| Wavelength range (mum) | 0～0.38 | 0.38～0.78 | 0.78～∞ |
| Percentage of total energy (%) | 7.00 | 47.29 | 45.71 |
| Radiant energy (W/m)2) | 95 | 640 | 618 |
Therefore, as long as the outdoor base station equipment can reduce the absorption of visible light and infrared rays irradiated on the surface of the base station equipment, the outdoor base station equipment can be ensured not to be heated under the solar radiation, thereby reducing the workload of an air conditioner and reducing the energy consumption.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-molecular composite coating material with high reflectivity for sunlight, which can effectively reflect solar radiation.
The technical scheme for realizing the purpose of the invention is as follows: a high-molecular composite coating material with high reflectivity to sunlight has a surface coating and an inner coating,
the surface coating comprises the following components in percentage by mass: 75-82% of acrylic resin, 18-24% of surface coating curing agent, 0.2-0.5% of nano indium tin oxide and 1.0-1.8% of surface coating auxiliary agent;
the inner coating comprises the following components in percentage by mass: 45-48% of polyester resin, 4.2-4.6% of inner coating curing agent, 20-47% of titanium dioxide, 0-25% of precipitated barium sulfate, 0.6-3% of inner coating auxiliary agent and 0-3% of pigment.
The surface coating in the technical scheme is prepared by the following preparation steps:
s1, pre-dispersing the nano indium tin oxide material: mixing nano indium tin oxide: acrylate homopolymer: copolymer of butyl acrylate and methyl methacrylate: preparing an absolute ethyl alcohol material at a ratio of 2:4:2:1, dispersing the prepared material by using amplitude-variable ultrasonic waves, heating and melting an acrylate homopolymer and a copolymer of butyl acrylate and methyl methacrylate by using ultrasonic energy to fully disperse the nano indium tin oxide in the melted liquid until the material reaches 120 ℃, stopping ultrasonic dispersion, volatilizing the absolute ethyl alcohol which helps to disperse by using heat in the heating process, rapidly cooling the material reaching the dispersion temperature by using a water cooling steel belt, and crushing to form an easily-crushed nano material dispersion for later use;
the higher the absorbance of the nano material with the same mass concentration is, the better the dispersibility of the nano material is, the complete dispersion of the nano material is indicated by no obvious change of the absorbance, the absorbance is detected by adopting a spectrophotometer for the nano materials with different temperatures (2 g of the nano material is taken to be put into 50ml of ethanol when the temperature is reached, ultrasonic dispersion is adopted for 45 seconds, and then the nano material is poured into a cuvette to measure the absorbance), and the temperature of 120 ℃ is determined as the ultrasonic dispersion stop temperature; the nanodispersion is shown in FIG. 2.
And S2, adding the nano material dispersion prepared in the S1, acrylic resin, a surface coating curing agent and a surface coating auxiliary agent into a mixing kettle according to a formula for mixing, carrying out melt extrusion mixing on the mixed materials through an extruder, cooling the extruded mixed materials, crushing the materials through a crusher, and carrying out fine crushing and sieving through an air classifying mill to obtain a surface layer product.
The inner coating layer in the technical scheme is prepared by the following preparation steps: the components are mixed according to the mass percentage and then melted, extruded and mixed by an extruder, and the extruded and mixed material is cooled, crushed and sieved to obtain the product.
According to the technical scheme, the thickness of the surface coating is 30-40 mu m, and the thickness of the inner coating is 60-80 mu m.
According to the technical scheme, the acrylic resin is epoxy resin, the epoxy equivalent is 390-650 g/eq, the surface coating curing agent is dodecanedioic acid (DDDA), and the particle size of the nano indium tin oxide is less than or equal to 20 nm.
The surface coating additive comprises one or two of a leveling agent and a degassing agent, the leveling agent is one of an acrylate homopolymer or an acrylate copolymer, the brightening agent is a copolymer of butyl acrylate and methyl methacrylate, and the degassing agent is benzil alcohol ketone.
The polyester resin in the technical scheme is carboxyl-terminated polyester resin formed by polymerizing polyalcohol and polycarboxylic acid, the acid value of the polyester resin is 30-38 mgKOH/g, and the Tg is 60-67 ℃; the inner coating curing agent is triglycidyl isocyanurate, the epoxy equivalent of the inner coating curing agent is 105-110 g/mol, and the volatile matter is less than or equal to 0.5%; the titanium dioxide is in a rutile type, and the whiteness is more than or equal to 98.
The pigment in the technical scheme is a transmission type IR pigment, and the pigment is one of naphthol red, phthalocyanine blue and azomethine black pigments.
The inner coating auxiliary agent in the technical scheme comprises one or more of a flatting agent, a dispersing agent, a degassing agent, a loosening agent, a graining agent, a texturing agent and a fluorescent whitening agent.
After the technical scheme is adopted, the invention has the following positive effects:
(1) the high-molecular composite coating material with high reflectivity to sunlight is prepared by high-voltage electrostatic coating, firstly spraying the inner coating, precuring at 180 ℃/5min, then spraying the inner coating, and then curing and forming at 200 ℃/10min, has no VOC emission in the construction process, belongs to an environment-friendly product, and can customize the appearances of various textures according to market demands.
(2) The invention fully utilizes the principle that different polymer coating materials have the optimal reflection efficiency on light with corresponding wavelength, and separately reflects the visible light region and the infrared light region with the most concentrated energy in solar radiation so as to achieve the optimal reflection effect, ensure that the protected object can absorb the solar radiation as little as possible, and avoid the temperature rise caused by the absorption of the solar radiation.
(3) The surface coating is a mixture of nano indium tin oxide and acrylic resin, and fully utilizes the principle that the nano indium tin oxide can transmit visible light and has strong reflection of infrared light to the solar radiation, and fully reflects the infrared part in the solar radiation.
(4) The inner coating is a mixture of titanium dioxide and polyester resin, and the principle that titanium dioxide has high reflectivity to the visible light part of solar radiation is fully utilized, so that the visible light penetrating through the surface coating is reflected out, the absorption of the protected object to the solar radiation is reduced, and the temperature rise of the protected object due to the solar radiation is avoided. The workload of the air conditioner is reduced, thereby achieving the purposes of energy conservation and consumption reduction.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which
FIG. 1 is a flow chart of the preparation of a coating according to the present invention;
FIG. 2 is a schematic diagram of nanomaterial dispersibility;
FIG. 3 is a graphical representation of the experimental performance of the composite coating of example 1;
FIG. 4 is a graphical representation of the experimental performance of the composite coating of example 2;
FIG. 5 is a graphical representation of the experimental performance of the composite coating of example 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
(example 1)
The invention provides a high-molecular composite coating material with high reflectivity to sunlight, wherein a surface coating comprises the following components in percentage by mass: 80.1 parts of acrylic resin, 18.2 parts of DDDA, 0.2 part of nano indium tin oxide, 0.8 part of flatting agent, 0.4 part of brightener and 0.3 part of benzoin.
The inner coating comprises the following components in percentage by mass: 47.5 parts of polyester resin, 4.2 parts of triglycidyl isocyanurate, 46.2 parts of rutile titanium dioxide, 1.0 part of flatting agent, 0.6 part of brightener, 0.3 part of benzoin degasifier and 0.2 part of fluorescent brightener.
(example 2)
The invention provides a high-molecular composite coating material with high reflectivity to sunlight, wherein a surface coating comprises the following components in percentage by mass: 75 parts of acrylic resin, 22.7 parts of DDDA, 0.5 part of nano indium tin oxide, 1.0 part of flatting agent, 0.5 part of brightener and 0.3 part of benzoin.
The inner coating comprises the following components in percentage by mass: 47.7 parts of polyester resin, 4.6 parts of triglycidyl isocyanurate, 46.5 parts of rutile titanium dioxide, 0.5 part of phthalocyanine blue, 0.1 part of bulking agent, 0.2 part of texture agent and 0.3 part of benzoin degassing agent.
(example 3)
The invention provides a high-molecular composite coating material with high reflectivity to sunlight, wherein a surface coating comprises the following components in percentage by mass: 75.1 parts of acrylic resin, 23.3 parts of DDDA, 0.3 part of nano indium tin oxide, 1.0 part of flatting agent and 0.3 part of benzoin.
The inner coating comprises the following components in percentage by mass: 45.5 parts of polyester resin, 4.2 parts of triglycidyl isocyanurate, 20 parts of rutile titanium dioxide, 25 parts of precipitated barium sulfate, 2.8 parts of naphthol red, 1.4 parts of a leveling agent, 0.7 part of a brightening agent and 0.4 part of a benzoin degassing agent.
The experimental properties of the composite coating of example 1 of the present invention are shown in fig. 3.
The experimental properties of the composite coating of example 2 of the invention are shown in figure 4.
The experimental properties of the composite coating of example 3 of the invention are shown in figure 5.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A high polymer composite coating material with high reflectivity to sunlight is characterized in that: has a surface coating layer and an inner coating layer,
the surface coating comprises the following components in percentage by mass: 75-82% of acrylic resin, 18-24% of surface coating curing agent, 0.2-0.5% of nano indium tin oxide and 1.0-1.8% of surface coating auxiliary agent, wherein the total content is 100%;
the inner coating comprises the following components in percentage by mass: 45-48% of polyester resin, 4.2-4.6% of inner coating curing agent, 20-47% of titanium dioxide, 0-25% of precipitated barium sulfate, 0.6-3% of inner coating auxiliary agent and 0-3% of pigment, wherein the total content is 100%;
the top coat is prepared by the following preparation steps:
s1, pre-dispersing the nano indium tin oxide material: mixing nano indium tin oxide: acrylate homopolymer: copolymer of butyl acrylate and methyl methacrylate: preparing an absolute ethyl alcohol material at a ratio of 2:4:2:1, dispersing the prepared material by using amplitude-variable ultrasonic waves, heating and melting an acrylate homopolymer and a copolymer of butyl acrylate and methyl methacrylate by using ultrasonic energy to fully disperse the nano indium tin oxide in the melted liquid until the material reaches 120 ℃, stopping ultrasonic dispersion, volatilizing the absolute ethyl alcohol which helps to disperse by using heat in the heating process, rapidly cooling the material reaching the dispersion temperature by using a water cooling steel belt, and crushing to form an easily-crushed nano material dispersion for later use;
s2, adding the nano material dispersion prepared in the S1, acrylic resin, a surface coating curing agent and a surface coating auxiliary agent into a mixing kettle according to a formula for mixing, performing melt extrusion mixing on the mixed materials through an extruder, cooling the extruded mixed materials, crushing the materials through a crusher, and performing fine crushing and sieving through an air classification mill to obtain a surface layer product;
the inner coating is prepared by the following preparation steps: mixing the components according to the mass percentage, then melting, extruding and mixing the components by an extruder, and cooling, crushing and sieving the extruded and mixed materials to obtain a product;
the pigment is a transmission type IR pigment, and the pigment is one of naphthol red, phthalocyanine blue and azomethine black pigment.
2. The polymer composite coating material with high reflectivity to sunlight according to claim 1, wherein: the thickness of the surface coating is 30-40 mu m, and the thickness of the inner coating is 60-80 mu m.
3. The polymer composite coating material with high reflectivity to sunlight according to claim 1, wherein: the acrylic resin is epoxy resin, the epoxy equivalent of the epoxy resin is 390-650 g/eq, the surface coating curing agent is dodecanedioic acid, and the particle size of the nano indium tin oxide is less than or equal to 20 nm.
4. The polymer composite coating material with high reflectivity to sunlight according to claim 1, wherein: the surface coating auxiliary agent comprises two or three of a leveling agent, a brightening agent and a degassing agent, wherein the leveling agent is one of acrylate homopolymer or acrylate copolymer, the brightening agent is a copolymer of butyl acrylate and methyl methacrylate, and the degassing agent is benzil alcohol ketone.
5. The polymer composite coating material with high reflectivity to sunlight according to claim 1, wherein: the polyester resin is carboxyl-terminated polyester resin formed by polymerizing polyalcohol and polycarboxylic acid, the acid value of the polyester resin is 30-38 mgKOH/g, and the Tg is 60-67 ℃; the inner coating curing agent is triglycidyl isocyanurate, the epoxy equivalent of the inner coating curing agent is 105-110 g/mol, and the volatile matter is less than or equal to 0.5%; the titanium dioxide is in a rutile type, the whiteness is not less than 98, and the whiteness of the precipitated barium sulfate is not less than 97.
6. The polymer composite coating material with high reflectivity to sunlight according to claim 1, wherein: the inner coating auxiliary agent comprises one or more of a leveling agent, a brightening agent, a dispersing agent, a degassing agent, a loosening agent, a graining agent, a texturing agent and a fluorescent whitening agent.
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| CN101531856A (en) * | 2009-04-09 | 2009-09-16 | 江苏兰陵高分子材料有限公司 | Reflecting thermal insulating paint |
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| JP2007217622A (en) * | 2006-02-20 | 2007-08-30 | Meiji Natl Ind Co Ltd | Powder coating for high-diffusion and high-reflection, and reflective plate using the powder coating |
| CN101121858B (en) * | 2007-09-29 | 2010-05-26 | 湖南涂喜乐新材料科技有限公司 | Heat insulation coating capable of reflecting solar heat rays |
| CN103396713A (en) * | 2013-08-11 | 2013-11-20 | 深圳市文浩建材科技有限公司 | Semi-transparent aqueous heat insulation coating and preparation method thereof |
| CN105176331A (en) * | 2015-09-25 | 2015-12-23 | 科威嘉粉末涂料（天津）有限公司 | Acrylic acid and silicon-aluminum composite high-heat-dissipation powder coating for engine |
| CN109401570A (en) * | 2018-11-02 | 2019-03-01 | 安徽桑瑞斯环保新材料有限公司 | A kind of coil infrared external reflection weather-resistant powder paint |
| CN111574878A (en) * | 2020-04-29 | 2020-08-25 | 诸暨瑞讯新材料有限公司 | Multilayer radiation cooling coating and preparation method thereof |
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