CN111410856A - Inorganic reflective heat-insulating coating and preparation method thereof - Google Patents
Inorganic reflective heat-insulating coating and preparation method thereof Download PDFInfo
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- 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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/004—Reflecting paints; Signal paints
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The invention relates to the technical field of coatings, in particular to an inorganic reflective heat-insulating coating and a preparation method thereof. The invention solves the problem of poor reflective heat insulation effect of the coating in the prior art, the coating has better heat insulation performance of blocking, reflection and radiation by matching the substances with high reflectance, high radiance and low heat conductivity coefficient and through the interaction between the substances, the coating adopts inorganic materials and has better environmental protection performance, the preparation process of the heat insulation coating is simple, and the components in the heat insulation coating can be reasonably graded by controlling the adding sequence of the components, thereby effectively blocking the heat transfer and leading the prepared coating to have better heat insulation performance.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to an inorganic reflective heat-insulating coating and a preparation method thereof.
Background
Along with the development of the building industry in China, the importance of energy conservation of houses is increasingly highlighted. The common exterior wall coating can absorb infrared rays in sunlight and convert the infrared rays into heat energy, so that the temperature of the coating is increased, and the heat energy is conducted from the coating to a substrate and then from the substrate to the inside, so that the temperature in a house or a container is increased. Theoretically, the heat insulation effect can be effectively achieved as long as the heat radiation can be effectively reflected or blocked, for example, silicate materials are adopted. Typical wall thermal insulation materials include phenolic resin synthetic materials, polyurethane materials, glass fiber materials, aluminum silicate rock wool, mineral wool, rubber and plastic, cork, perlite and the like. These materials have the disadvantages of heavy weight, cumbersome construction, poor water resistance, poor heat insulation effect, etc.
To overcome these drawbacks, heat reflective coatings have been developed in recent years. Compared with the common coating, the coating can reflect or scatter infrared rays more and has a certain heat insulation effect.
At present, the reflective heat insulation coating is mainly prepared by taking synthetic resin (acrylic emulsion) as a base material, functional pigments and fillers (such as infrared pigment, hollow microspheres, metal particles and the like) and additives, is applied to the surface of a building, and has a functional coating with higher sunlight reflectance and higher hemispherical emissivity, thereby achieving the heat insulation effect.
For example, Chinese patent CN106467694A discloses a full-color reflective and thermal insulation coating system for buildings and a preparation method thereof, which takes water-diluted acrylic resin as a base material, and is composed of pigments such as titanium dioxide, iron oxide red, titanium chrome yellow and the like, fillers such as ceramic microspheres, functional titanium dioxide and the like, and the infrared reflectivity of the coating system to the infrared ray with the wavelength of 1200-2000nm is more than 50 percent. The coating still has the defects of poor environmental protection performance, weak heat reflection capability on near-infrared bands with concentrated solar heat energy and difficulty in meeting practical requirements.
However, chinese patent CN1583894A discloses "a heat-insulating sunscreen paint and a preparation method thereof", wherein a composite heat-insulating coating for reflecting and blocking solar heat is formed by a film-forming agent, mica powder and a hollow ceramic heat-insulating material, and has the characteristics of low heat conductivity coefficient, high heat reflectivity and the like, but the adopted resin is a solvent type resin, which has the problem of environmental pollution, and the single hollow ceramic heat-insulating material is used, so that the sunlight reflectivity is low, the reflection heat-insulating effect of the paint is limited, and the increasingly strict energy-saving requirements of houses cannot be met.
In view of the situation of the prior art, the applicant provides an inorganic reflective heat insulation coating and a preparation method thereof through a large number of tests and researches, and the inorganic reflective heat insulation coating has high reflectivity and emissivity and good heat insulation effect.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides an inorganic reflective heat-insulating coating with functions of reflection, obstruction and solar radiation, solves the problem of poor reflective heat-insulating effect of the coating in the prior art, ensures that the coating has better obstruction, reflection and radiation heat-insulating properties by matching substances with high reflectance, high radiance and low heat conductivity coefficient together and through the interaction between the substances, adopts inorganic materials and has better environmental protection property, has simple preparation process, can reasonably grade the components in the heat-insulating coating by controlling the adding sequence of the components, effectively blocks the heat transfer and ensures that the prepared coating has better heat-insulating property.
In order to achieve the purpose of the invention, the invention provides the following technical scheme:
an inorganic reflective heat insulation coating comprises the following components in percentage by weight:
0.5 to 1.5 percent of lanthanum hexaboride;
4.5 to 7.5 percent of glass beads;
15% -25% of wollastonite;
6 to 10 percent of mica powder;
20% -30% of silica sol;
6-10% of acrylic resin;
10-20% of heavy calcium carbonate;
3% -5% of reflective heat-insulating powder;
0.45 to 0.85 percent of dispersant;
0.15 to 0.45 percent of cellulose;
15 to 30 percent of deionized water.
As a preferable scheme of the invention, the paint comprises the following components in percentage by weight:
1% of lanthanum hexaboride;
glass beads 5;
20% of wollastonite;
7% of mica powder;
24% of silica sol;
7% of acrylic resin;
15 percent of heavy calcium;
3.0% of reflective heat-insulating powder;
0.55 percent of dispersant;
0.45 percent of cellulose;
23% of deionized water.
As a preferable scheme of the invention, the glass beads are glass beads coated by alumina, wherein the content of alumina is not less than 85%, and the mesh number is not less than 500.
As a preferable scheme of the invention, the glass beads are closed hollow glass beads, the particle size is 35-80 μm, and the thermal conductivity is 0.05-0.10W/(. square meter.K).
As a preferable scheme of the invention, the heavy calcium consists of 900-mesh heavy calcium and 600-mesh heavy calcium according to the mass ratio of 3: 5.
As a preferable scheme of the invention, the reflective heat insulation powder is a mixture of nano-scale titanium dioxide micro powder and nano-metal oxide micro powder according to the mass ratio of 2: 1.
As a preferable scheme of the invention, the metal oxide is one or more of zinc oxide, manganese dioxide and vanadium pentoxide.
In a preferred embodiment of the present invention, the dispersant is a low molecular weight poly (amine acrylate) dispersant.
In a preferred embodiment of the present invention, the cellulose is ethyl-hydroxyethyl cellulose having a viscosity of 3000-4000 mPa.S.
On the other hand, the invention also provides a preparation method of the inorganic reflective heat-insulating coating, which comprises the following steps:
step a, weighing the components according to the design proportion of the inorganic reflective thermal insulation coating of any one of claims 1 to 9, putting cellulose into 2/3 deionized water, stirring and dispersing for 15 to 25min, and then adding a dispersing agent to obtain a first slurry;
step b, adding 3/5 silica sol into the first slurry obtained in the step a, and stirring and dispersing for 12-18min to obtain a second slurry;
c, adding the rest 1/3 deionized water, 2/5 silica sol and reflective heat insulation powder into the second slurry obtained in the step b, and dispersing for 15-20min under the conditions of the rotation speed of 1200-1500rpm to obtain third slurry;
step d, sequentially adding lanthanum hexaboride, glass beads, wollastonite, mica powder and triple superphosphate into the third slurry obtained in the step c, uniformly mixing, and grinding until the fineness is less than or equal to 30 microns to obtain a fourth slurry;
and e, adding the weighed acrylic resin into the fourth slurry obtained in the step d, uniformly mixing, and adjusting the stormer viscosity to 25 ℃ to 65-85KU to obtain the inorganic reflective heat-insulating coating.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides an inorganic reflective heat-insulating coating with reflection, obstruction and solar radiation, which solves the problem of poor reflective heat-insulating effect of the coating in the prior art, and ensures that the coating has better obstruction, reflection and radiation heat-insulating properties by matching substances with high reflectance, high radiance and low heat conductivity coefficient together and through the interaction between the substances;
specifically, the particle size of the added lanthanum hexaboride is consistent with the length of a solar wave, and under the irradiation of the solar wave, the particles and the solar wave generate resonance, so that electrons of the particles transition to a high energy level, and the reflection and diffraction effects of light wave light energy are generated, thereby preventing heat energy from entering a base layer, reflecting the heat energy of sunlight and obtaining a good heat insulation effect;
the glass beads with heat storage capacity and lower heat conductivity coefficient are added, the glass beads float in the surface layer of the coating, the heat insulation performance and the scattering performance of the coating are utilized, the coating achieves higher reflectance, and the surface of the glass beads is coated with alumina, so that the reflectivity of infrared and infrared bands in sunlight is improved, reflection, obstruction and solar radiation are realized, and the heat insulation performance of the coating is greatly improved;
in addition, the glass beads are preferably closed hollow glass beads, so that sunlight can be effectively reflected, the absorption of the base layer to the sunlight is reduced, and meanwhile, as the hollow glass spheres are filled with inert gas, the heat conductivity coefficient is low, the heat conduction is blocked, and the heat insulation performance of the coating is improved;
according to the invention, the heavy calcium carbonate, the mica powder and the like are selected to be nearly transparent in visible light and near infrared light areas, so that the far infrared emissivity of the coating is effectively improved, and the heat insulation performance of the coating is improved;
the added titanium dioxide micro powder for reflecting the heat insulation powder has higher solar reflectance and hemispherical emissivity, more than 95% of the solar heat can be reflected out, and meanwhile, the heat transferred into the surface and the metal oxide micro powder react to generate a large amount of electronic transitions, so that a part of the energy is radiated into space in the form of infrared rays to reduce the heat island effect of a city.
Drawings
FIG. 1 is a flow chart illustrating the steps of a method for preparing an inorganic reflective thermal barrier coating according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following detailed description of specific implementations of the present invention is provided in conjunction with specific embodiments:
the invention provides an inorganic reflective heat insulation coating which comprises the following components in percentage by weight:
0.5 to 1.5 percent of lanthanum hexaboride;
4.5 to 7.5 percent of glass beads;
15% -25% of wollastonite;
6 to 10 percent of mica powder;
20% -30% of silica sol;
6-10% of acrylic resin;
10-20% of heavy calcium carbonate;
3% -5% of reflective heat-insulating powder;
0.45 to 0.85 percent of dispersant;
0.15 to 0.45 percent of cellulose;
15 to 30 percent of deionized water.
The sum of the percentage of the components is 100 percent.
In some preferred embodiments, the glass beads are glass beads coated with alumina, wherein the content of alumina is not less than 85%, and the mesh number is not less than 500, so that the glass beads coated with alumina have very high reflectivity in infrared and infrared bands of sunlight.
In some preferred embodiments, the glass beads are closed hollow glass beads having a particle size of 35 to 80 μm and a thermal conductivity of 0.05 to 0.10W/(m)2K), the closed hollow glass bead can reflect sunlight, reduce the absorption of the base layer to the sunlight, and simultaneously, as the hollow glass sphere is filled with inert gas, the heat conductivity coefficient is low, the heat conduction is blocked, and the heat insulation performance of the coating is improved.
In some preferred embodiments, the heavy calcium consists of 900-mesh heavy calcium and 600-mesh heavy calcium in a mass ratio of 3:5, the heavy calcium with different meshes is selected for grading, and the far infrared emissivity of the coating can be effectively improved by utilizing the fact that the heavy calcium is nearly transparent in visible light and near infrared light regions.
In some preferred embodiments, the reflective heat insulation powder is a mixture of nano-scale titanium dioxide micro powder and nano-metal oxide micro powder in a mass ratio of 2:1, the titanium dioxide micro powder in the reflective heat insulation powder has higher solar reflectance and hemispherical emissivity, more than 95% of energy in solar heat can be reflected out, and simultaneously, the heat transmitted to the surface and the metal oxide micro powder react to generate a large number of electronic transitions, so that a part of energy is radiated into space in the form of infrared rays to reduce the urban heat island effect.
In some preferred embodiments, the metal oxide is one or more of zinc oxide, manganese dioxide and vanadium pentoxide.
In some preferred embodiments, the dispersant is a low molecular weight poly (amine acrylate) dispersant, which can increase the dispersion concentration and stability of the inorganic material, and can surround a layer of charges on the surface of the inorganic material to repel particles, thereby achieving the effect of stabilizing the slurry.
In some preferred embodiments, the cellulose is ethyl-hydroxyethyl cellulose having a viscosity of 3000-4000 mPa.S.
Referring to fig. 1, an implementation flow of a preparation method of an inorganic reflective thermal insulation coating according to an embodiment of the present invention is shown, and for convenience of description, only a portion related to the embodiment of the present invention is shown, which is detailed as follows:
in step S101, weighing the components according to a design ratio, putting cellulose into 2/3 deionized water, stirring and dispersing for 15-25min, and then adding a dispersing agent to obtain a first slurry;
in this embodiment, 2/3 deionized water and cellulose are sequentially added into a dispersion tank, and stirred and dispersed for 15-25min at 400-600rpm until being uniformly mixed;
in step S102, 3/5 silica sol is added into the first slurry, and stirring and dispersing are carried out for 12-18min, so as to obtain a second slurry;
preferably, the stirring speed is 800-;
in step S103, adding the remaining 1/3 deionized water, 2/5 silica sol and reflective heat insulation powder into the second slurry, and dispersing for 15-20min at the rotation speed of 1200-;
in step S104, sequentially adding lanthanum hexaboride, glass beads, wollastonite, mica powder and heavy calcium carbonate into the third slurry, uniformly mixing, and grinding until the fineness is less than or equal to 30 microns to obtain a fourth slurry;
in step S105, adding the weighed acrylic resin into the fourth slurry, uniformly mixing, and adjusting the stormer viscosity to 25 ℃ to 65-85KU to obtain the inorganic reflective heat-insulating coating.
The preparation method of the heat reflection heat insulation coating provided by the invention is simple in process and suitable for industrial production.
The above technical solution of the present invention will be described in detail with reference to specific examples.
The material was prepared for implementation according to the component formulation of table 1.
Table 1 shows the mass parts of the component formulas of example 1, example 2 and example 3
| Numbering | Example 1 | Example 2 | Example 3 |
| Lanthanum hexaboride | 1 | 1 | 1.3 |
| Glass micro-beads | 5 | 6 | 7 |
| Wollastonite | 19 | 20 | 24 |
| Mica powder | 7 | 8 | 6 |
| Silica sol | 24 | 25 | 21 |
| Acrylic resin | 7 | 8 | 6 |
| Heavy calcium carbonate | 13 | 15 | 14 |
| Reflective heat-insulating powder | 3 | 2.5 | 3.7 |
| Dispersing agent | 0.55 | 0.85 | 0.65 |
| Cellulose, process for producing the same, and process for producing the same | 0.45 | 0.15 | 0.35 |
| Deionized water | 20 | 19.5 | 16 |
Example 1:
the preparation method comprises the following steps of based on the weight of the formula in the table 1:
(1) weighing the components according to a designed ratio, putting cellulose into 2/3 deionized water, stirring and dispersing at 400rpm for 25min, and then adding a dispersing agent to obtain a first slurry;
(2) adding 3/5 silica sol into the first slurry obtained in the step (1), and stirring and dispersing at 800rpm for 18min to obtain a second slurry;
(3) adding the remaining 1/3 deionized water, 2/5 silica sol and reflective heat insulation powder into the second slurry obtained in the step (2), and dispersing for 20min at the rotation speed of 1200rpm to obtain a third slurry;
(4) sequentially adding lanthanum hexaboride, glass beads, wollastonite, mica powder and heavy calcium into the third slurry obtained in the step (3), uniformly mixing, and grinding until the fineness is less than or equal to 30 micrometers to obtain a fourth slurry;
(5) and (4) adding the weighed acrylic resin into the fourth slurry in the step (4), uniformly mixing, and adjusting the stormer viscosity to 25 ℃ to 65-85KU to obtain the inorganic reflective heat-insulating coating.
Example 2:
the preparation method comprises the following steps of based on the weight of the formula in the table 1:
(1) weighing the components according to a designed ratio, putting cellulose into 2/3 deionized water, stirring and dispersing at 500rpm for 20min, and then adding a dispersing agent to obtain a first slurry;
(2) adding 3/5 silica sol into the first slurry obtained in the step (1), and stirring and dispersing for 15min at 900rpm to obtain a second slurry;
(3) adding the remaining 1/3 deionized water, 2/5 silica sol and reflective heat insulation powder into the second slurry obtained in the step (2), and dispersing for 18min at the rotating speed of 1300rpm to obtain a third slurry;
(4) sequentially adding lanthanum hexaboride, glass beads, wollastonite, mica powder and heavy calcium into the third slurry obtained in the step (3), uniformly mixing, and grinding until the fineness is less than or equal to 30 micrometers to obtain a fourth slurry;
(5) and (4) adding the weighed acrylic resin into the fourth slurry in the step (4), uniformly mixing, and adjusting the stormer viscosity to 25 ℃ to 65-85KU to obtain the inorganic reflective heat-insulating coating.
Example 3:
the preparation method comprises the following steps of based on the weight of the formula in the table 1:
(1) weighing the components according to a designed ratio, putting cellulose into 2/3 deionized water, stirring and dispersing for 15min at 600rpm, and then adding a dispersing agent to obtain a first slurry;
(2) adding 3/5 silica sol into the first slurry obtained in the step (1), and stirring and dispersing for 12min at 1000rpm to obtain a second slurry;
(3) adding the remaining 1/3 deionized water, 2/5 silica sol and reflective heat insulation powder into the second slurry obtained in the step (2), and dispersing for 15min at the rotation speed of 1500rpm to obtain a third slurry;
(4) sequentially adding lanthanum hexaboride, glass beads, wollastonite, mica powder and heavy calcium into the third slurry obtained in the step (3), uniformly mixing, and grinding until the fineness is less than or equal to 30 micrometers to obtain a fourth slurry;
(5) and (4) adding the weighed acrylic resin into the fourth slurry in the step (4), uniformly mixing, and adjusting the stormer viscosity to 25 ℃ to 65-85KU to obtain the inorganic reflective heat-insulating coating.
Performance tests (in accordance with the standards: JG/T235-2014, GB/T9755-2014) were performed on the inorganic reflective thermal insulating coatings prepared in examples 1-3 above, and the results are shown in Table 1.
TABLE 1
As can be seen from Table 1, the organic reflective heat-insulating coating with excellent heat-insulating property and environmental friendliness is prepared by preferably selecting a heat-insulating filler and coating compounding process. The performance detection result of the coating shows that the heat insulation effect of the coating is superior to that of the common aluminum powder coating and the outer wall coating.
In conclusion, the main innovation points of the inorganic heat-insulating coating are as follows:
1. the invention provides an inorganic reflective heat-insulating coating with reflection, obstruction and solar radiation, which solves the problem of poor reflective heat-insulating effect of the coating in the prior art, and ensures that the coating has better obstruction, reflection and radiation heat-insulating properties by matching substances with high reflectance, high radiance and low heat conductivity coefficient together and through the interaction between the substances;
2. specifically, the particle size of the added lanthanum hexaboride is consistent with the length of a solar wave, and under the irradiation of the solar wave, the particles and the solar wave generate resonance, so that electrons of the particles transition to a high energy level, and the reflection and diffraction effects of light wave light energy are generated, thereby preventing heat energy from entering a base layer, reflecting the heat energy of sunlight and obtaining a good heat insulation effect;
3. the glass beads with heat storage capacity and lower heat conductivity coefficient are added, the glass beads float in the surface layer of the coating, the heat insulation performance and the scattering performance of the coating are utilized, the coating achieves higher reflectance, and the surface of the glass beads is coated with alumina, so that the reflectivity of infrared and infrared bands in sunlight is improved, reflection, obstruction and solar radiation are realized, and the heat insulation performance of the coating is greatly improved;
4. in addition, the glass beads are preferably closed hollow glass beads, so that sunlight can be effectively reflected, the absorption of the base layer to the sunlight is reduced, and meanwhile, as the hollow glass spheres are filled with inert gas, the heat conductivity coefficient is low, the heat conduction is blocked, and the heat insulation performance of the coating is improved;
5. according to the invention, the heavy calcium carbonate, the mica powder and the like are selected to be nearly transparent in visible light and near infrared light areas, so that the far infrared emissivity of the coating is effectively improved, and the heat insulation performance of the coating is improved;
6. the added titanium dioxide micro powder for reflecting the heat insulation powder has higher solar reflectance and hemispherical emissivity, more than 95% of the solar heat can be reflected out, and meanwhile, the heat transferred into the surface and the metal oxide micro powder react to generate a large amount of electronic transitions, so that a part of the energy is radiated into space in the form of infrared rays to reduce the heat island effect of a city.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. The inorganic reflective heat insulation coating is characterized by comprising the following components in percentage by weight:
0.5 to 1.5 percent of lanthanum hexaboride;
4.5 to 7.5 percent of glass beads;
15% -25% of wollastonite;
6 to 10 percent of mica powder;
20% -30% of silica sol;
6-10% of acrylic resin;
10-20% of heavy calcium carbonate;
2.5 to 4.5 percent of reflective heat insulation powder;
0.45 to 0.85 percent of dispersant;
0.15 to 0.45 percent of cellulose;
15 to 30 percent of deionized water.
2. The inorganic reflective insulation coating according to claim 1, characterized by comprising the following components in percentage by weight:
1% of lanthanum hexaboride;
glass beads 5;
20% of wollastonite;
7% of mica powder;
24% of silica sol;
7% of acrylic resin;
15 percent of heavy calcium;
3.0% of reflective heat-insulating powder;
0.55 percent of dispersant;
0.45 percent of cellulose;
23% of deionized water.
3. The inorganic reflective heat-insulating coating according to claim 1, wherein the glass beads are glass beads coated with alumina, wherein the content of alumina is not less than 85%, and the mesh number is not less than 500.
4. The inorganic reflective thermal insulation coating according to claim 3, wherein said glass beads are closed hollow glass beads having a particle size of 35 to 80 μm and a thermal conductivity of 0.05 to 0.10W/(. square-meter.K).
5. The inorganic reflective thermal insulation coating according to claim 1, wherein the heavy calcium consists of 900 mesh heavy calcium and 600 mesh heavy calcium in a mass ratio of 3: 5.
6. The inorganic reflective insulation coating as claimed in claim 1, wherein the reflective insulation powder is a mixture of nano-scale titanium dioxide micro powder and nano-metal oxide micro powder in a mass ratio of 2: 1.
7. The inorganic reflective insulation coating according to claim 6, wherein said metal oxide is one or more of zinc oxide, manganese dioxide and vanadium pentoxide.
8. The inorganic reflective insulation coating of claim 1, wherein the dispersant is a low molecular weight polyacrylate amine salt dispersant.
9. The inorganic reflective thermal insulating coating according to claim 1, wherein said cellulose is ethyl-hydroxyethyl cellulose having a viscosity of 3000-4000 mPa-S.
10. The preparation method of the inorganic reflective heat-insulating coating is characterized by comprising the following steps:
step a, weighing the components according to the design proportion of the inorganic reflective thermal insulation coating of any one of claims 1 to 9, putting cellulose into 2/3 deionized water, stirring and dispersing for 15 to 25min, and then adding a dispersing agent to obtain a first slurry;
step b, adding 3/5 silica sol into the first slurry obtained in the step a, and stirring and dispersing for 12-18min to obtain a second slurry;
c, adding the rest 1/3 deionized water, 2/5 silica sol and reflective heat insulation powder into the second slurry obtained in the step b, and dispersing for 15-20min under the conditions of the rotation speed of 1200-1500rpm to obtain third slurry;
step d, sequentially adding lanthanum hexaboride, glass beads, wollastonite, mica powder and triple superphosphate into the third slurry obtained in the step c, uniformly mixing, and grinding until the fineness is less than or equal to 30 microns to obtain a fourth slurry;
and e, adding the weighed acrylic resin into the fourth slurry obtained in the step d, uniformly mixing, and adjusting the stormer viscosity to 25 ℃ to 65-85KU to obtain the inorganic reflective heat-insulating coating.
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| CN113201268A (en) * | 2021-04-09 | 2021-08-03 | 湘江涂料科技有限公司 | Reflective heat-insulating coating for coating engineering machinery and preparation method thereof |
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Application publication date: 20200714 |