CN112812637A - Anti-dewing coating and preparation method thereof - Google Patents
Anti-dewing coating and preparation method thereof Download PDFInfo
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- CN112812637A CN112812637A CN202011639393.2A CN202011639393A CN112812637A CN 112812637 A CN112812637 A CN 112812637A CN 202011639393 A CN202011639393 A CN 202011639393A CN 112812637 A CN112812637 A CN 112812637A
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- 239000012774 insulation material Substances 0.000 claims abstract description 14
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Classifications
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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
- C09D133/04—Homopolymers or copolymers of esters
-
- 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
-
- 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
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses an anti-condensation coating, which comprises a mixed emulsion formed by a pure acrylic emulsion and a silicon resin emulsion and a heat insulation material formed by combining microbeads and aerogel slurry; the mixed emulsion accounts for 20-40% of the total mass of the anti-condensation coating; the heat insulation material accounts for 15-20% of the total mass of the anti-condensation coating. The anti-condensation coating is added with the heat insulation material with the micro-beads and the aerogel, so that the temperature difference between the surface of the wall and the air is reduced, the condensation of the surface of the wall is prevented, and the problems of moisture absorption saturation, moisture absorption expansion and adhesion reduction of the traditional anti-condensation coating due to moisture absorption of water vapor in the air are solved; the pure acrylic emulsion and the silicone resin emulsion are used, and the water resistance and excellent physical property of the pure acrylic waterproof emulsion and the air permeability and hydrophobicity of the silicone resin emulsion are effectively combined, so that the coating has better physical property and is not easy to damage, and the coating has waterproof and lotus leaf self-cleaning effects and prevents external water from invading.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to an anti-condensation coating and a preparation method thereof.
Background
The dew condensation is generally caused by the phenomenon that the temperature of the wall surface of a building space is lower than the dew point temperature of indoor air, and then condensed water appears on the wall surface, particularly in autumn and winter or plum rain, and is particularly obvious in the southern environment. The generation of dew affects people living in cities, the living environment of the people deteriorates the indoor air quality and affects the body health, dew can pollute and moisten the indoor inner surface, so that stored articles are mildewed and the building materials are damaged, the using function of the building is greatly affected, for example, a high-end civil basement cannot be treated for a long time, the wall surface and the top plate surface are easily frozen, expanded and mildewed, and secondary pollution is caused to the air environment in the engineering along with bacterial breeding, so that the treatment cost is increased, and the service life of the engineering is shortened; for example, the machine room of a hydroelectric power plant has a humid environment, and dew generated by temperature difference is a great hidden danger to the safety production.
Nowadays, people pursue high-quality living environment, increasingly attach importance to building energy conservation, environmental protection idea and safety, how to realize economy, low cost and superior function, and the coating meeting the requirements is also the topic of attention at present. Therefore, the anti-condensation device has important functions of protecting articles and machinery in special environment and prolonging the service life, and not only has a living environment in which people live. The current means for preventing dewing on the market mainly comprise: the structural design of equipment or a house, the temperature and humidity regulation control of a system and the use of materials with anti-condensation performance. The special structure design disclosed in patent No. CN2881424Y prevents dew condensation, but the cost is high, and the special structure design is difficult to be used in formed equipment or houses; for example, the anti-condensation method for temperature and humidity regulation control of patent No. CN101975762A has quite high manufacturing cost and is difficult to be used in a designed and decorated room; for example, patent No. CN101962505B discloses an anti-condensation coating material which has anti-condensation ability, but absorbs condensation water to prevent condensation on the surface, and it is difficult to prevent condensation after saturation, and it is difficult to ensure basic properties such as adhesion and mold resistance of the coating material even after repeated moisture absorption and release for a long period of time. The aim of preventing condensation can also be achieved by reducing the temperature difference between the surface of the wall and the air temperature through the heat-insulating coating, and the coating disclosed by the patent No. CN201610153323.3 can achieve the reflection heat-insulating effect through a specific heat-insulating material, but the emulsion used by the coating does not have hydrophobic air permeability, the adhesive force of the coating can be influenced in a long-time water environment, the heat-insulating effect of the coating can be lost, and the aim of preventing condensation is also not achieved.
Disclosure of Invention
In view of the above, in order to overcome the defects of the prior art and achieve the above object, the present invention aims to provide an anti-dewing coating and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
an anti-dewing coating comprises a mixed emulsion formed by the pure acrylic emulsion and the silicone resin emulsion and a heat insulation material formed by combining micro-beads and aerogel slurry; the mixed emulsion accounts for 20-40% of the total mass of the anti-condensation coating; the heat insulation material accounts for 15-20% of the total mass of the anti-condensation coating.
According to some preferred embodiments of the invention, the mass ratio of the pure acrylic emulsion to the silicone resin emulsion in the mixed emulsion is 1-3: 1, preferably 2: 1.
In some embodiments of the present invention, the acrylic emulsion is a single-component waterproof emulsion having excellent physical properties, early wet adhesion, excellent stain resistance and weather resistance; the silicone resin emulsion is water diluted silicone resin emulsion with active matter of 42% and density of 1.069g/cm3So that the prepared paint has the characteristics of high air permeability, low water absorption, difficult contamination and long service life.
According to some preferred embodiment aspects of the present invention, the mass ratio of the microbeads to the aerogel slurry in the thermal insulation material is 2-6: 1.
According to some preferred embodiments of the invention, the beads are hollow glass beads and/or floating beads. Wherein the hollow glass beads are soda lime borosilicate glass and have unique thin-wall hollow spheresThe shape structure has a true density of 0.20-0.76g/cm3The particle size is 2-130 mu m, the heat conductivity coefficient is 0.03-0.06W/(m.K), and the material has excellent heat insulation and preservation performance due to low density, low oil absorption, high isostatic strength and low heat conductivity, and can meet different process requirements; the floating bead is a high-purity heat-preservation and heat-insulation floating bead with the purity of 99.9 percent, is a fly ash hollow sphere, has the particle size of less than 0.1 mm, is closed and smooth in surface and is low in heat conductivity.
According to some preferred embodiments of the present invention, the beads are a mixture of hollow glass beads and floating beads, and the mass ratio of the hollow glass beads to the floating beads is arbitrary.
According to some preferred embodiments of the present invention, the aerogel slurry is formed by dispersing aerogel particles in a liquid, and the solid content of the aerogel particles in the aerogel slurry is 10-15%.
According to some preferred embodiments of the present invention, the aerogel particles have a particle size of 15 to 50 μm, and the aerogel slurry has a density of 200 to 350kg/m3。
The aerogel slurry adopted in the application is formed by dispersing the silicon dioxide aerogel particles with the nano-pore structure in a liquid medium such as water, and the prepared coating has excellent heat insulation and preservation performance, good sound insulation performance, flame retardance, hydrophobicity and other excellent performances because the aerogel particles have the characteristics of extremely high porosity, extremely low density, high specific surface area, ultrahigh pore volume rate and the like.
According to some preferred embodiments of the present invention, the silicone emulsion is a water-diluted silicone emulsion.
According to some preferred embodiments of the present invention, the anti-dewing coating comprises the following raw material components in parts by weight: 20-40 parts of water, 0.2-0.4 part of bentonite, 0.1-0.3 part of multifunctional auxiliary agent, 0.3-0.6 part of dispersing agent, 0.3-0.6 part of defoaming agent, 0.1-0.3 part of mildew-proof and algae-proof agent, 5-10 parts of titanium dioxide, 15-20 parts of heat-insulating material, 3-5 parts of mica powder, 5-15 parts of heavy calcium carbonate, 20-40 parts of emulsion, 1-1.5 parts of film-forming auxiliary agent, 1-1.5 parts of antifreezing agent and 1-5 parts of waterproof agent.
The detailed functions of the above components are as follows:
bentonite has high thickening efficiency, imparts thixotropy, and provides stability of viscosity, preventing sedimentation of pigments and fillers. The multifunctional assistant can prevent the pigment from being reunited and dispersed to reach the best, reduce air bubbles in the coating, improve the comprehensive performance of the coating and adjust the pH value to achieve the thickening effect. The dispersant has larger pigment bearing capacity, so that the pigment filler is dispersed more uniformly, the using amount is small, the viscosity of the coating is stable, and the gloss retention is excellent. The defoaming agent is a polymer composite mineral oil defoaming agent, so that the cost of the defoaming agent can be saved by 20%, the defoaming agent has quick defoaming capability, is effective in microbubble breaking, and has a wetting function. The mildew-proof algaecide selects RO CIMA 342, is a high-performance preservative, can effectively inhibit the growth of surface mould, has excellent algae-proof antibacterial activity and extremely strong leaching resistance, and can provide long-term protection. The titanium dioxide is rutile titanium dioxide, and has excellent durability and covering power. The mica powder with the particle size of 800 meshes is selected, so that the abrasion resistance and the physical and mechanical properties of the paint film are improved. The coarse whiting is heavy calcium carbonate with the grain diameter of 1000-1500 meshes, so that the whiteness of the emulsion paint is increased, a certain dry covering power is realized, and a certain suspension property plays a role in preventing sedimentation. The film-forming auxiliary agent is dodecyl alcohol ester, so that the film-forming effect of the coating can be improved, and the minimum film-forming temperature of the coating can be effectively reduced. The antifreezing agent selects ethylene glycol, improves the antifreezing property of the coating, improves the freeze-thaw resistance and improves the durability. The BS1306 waterproof agent is selected as the waterproof agent, so that the hydrophobicity, the water resistance and the air permeability of the building coating can be improved, and the operation performance (the opening time is prolonged) and the anti-adhesion performance of the water-based coating are improved.
The invention also provides a preparation method of the anti-condensation coating, which comprises the following steps: adding bentonite into water, stirring for thickening, then adding a multifunctional auxiliary agent, a dispersing agent, a defoaming agent, a mildew-proof and algae-proof agent, titanium dioxide, mica powder and heavy calcium carbonate, uniformly stirring, then adding a pure acrylic emulsion and a silicone resin emulsion, uniformly stirring, adding a heat-insulating material, uniformly mixing, finally adding a film-forming auxiliary agent, an antifreezing agent and a waterproof agent, and uniformly stirring to obtain the anti-condensation coating.
In some embodiments of the present invention, the preparation method of the anti-condensation coating specifically includes the following steps:
the method comprises the following steps: adding water into a container, stirring, and adding bentonite;
step two: after the solution is uniform and thickened, adding the multifunctional auxiliary agent, the dispersing agent, the defoaming agent and the mildew-proof algaecide and uniformly stirring;
step three: slowly adding titanium dioxide, mica powder and coarse whiting into the mixture obtained in the second step, and highly dispersing until the mixture is uniform;
step four: adding pure acrylic emulsion and silicone resin emulsion and mixing uniformly;
step five: adding a heat insulating material and uniformly mixing;
step six: adding the film forming assistant, the antifreezing agent and the waterproofing agent, and uniformly stirring to obtain a finished product.
In some embodiments of the invention, the insulation material is prepared by: and uniformly mixing the microbeads and the aerogel slurry according to the proportion to obtain the heat-insulating material.
Compared with the prior art, the invention has the advantages that: according to the anti-condensation coating, the heat insulation material with the beads and the aerogel is added, so that the temperature difference between the surface of the wall and the air is reduced, the condensation of the surface of the wall is prevented, the problems of moisture absorption saturation, moisture absorption expansion and adhesion reduction of the traditional anti-condensation coating due to moisture absorption of water vapor in the air are solved, the long-term use effect of the coating is improved, and the potential safety hazard caused by moisture absorption expansion is solved; the pure acrylic emulsion and the silicone resin emulsion are used, the water resistance and excellent physical properties of the pure acrylic waterproof emulsion are effectively combined, and the air permeability and hydrophobicity of the silicone resin emulsion are effectively combined, so that the coating has better physical properties and is not easy to damage, the coating has waterproof and lotus leaf self-cleaning effects to prevent external water from invading, the air permeability is realized to allow moisture in the concrete to permeate out, and the coating is prevented from hollowing and peeling.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention is clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
All raw materials in the invention are commercially available building materials or industrial auxiliaries, and can be commercially available conventional raw materials of the same type.
The raw materials used in the following examples are as follows:
the bentonite is Bentone LT (Jinshengji chemical Co., Ltd., Guangzhou city); the multifunctional auxiliary agent is AM P-95 (New materials science and technology Co., Ltd. of tin-free Taxus chinensis); the Dispersant is Dispersant 5040 (New Technology Co., Ltd. of Cedar New Material) of Santa Clara, Japan; the antifoaming agent is antifoaming agent ST 2410AC of Basff (New mingRui material Co., Ltd., Zhejiang); the mildew and algae resistant agent is ROCIMA 342 (Guangzhou and Waals chemical materials Co., Ltd.); the titanium dioxide is rutile type titanium dioxide (Shanghai black tiger chemical technology Co., Ltd.) mica powder with the particle size of 800 meshes (Shijiazhuangxing Utility Co., Ltd.); the coarse whiting is coarse whiting with the grain size of 1000-; the hollow glass beads are C25 hollow glass beads (New Chinese Huaxing material Co., Ltd.); the floating beads are white floating beads (Yixin mineral products, Inc. in Lingshou county); AG-S aerogel slurry (Shenzhen Zhongji science and technology Co., Ltd.); the pure acrylic emulsion is Fs-6699A (constant velocity Badfuki technology, Inc.); the silicone emulsion was BS 43N (nanjing chime sea trade ltd); the film-forming assistant is dodecyl alcohol ester (New technology Co., Ltd. of tin-free Taxus chinensis); the antifreeze is glycol (New materials science and technology company of tin-free Taxus chinensis); the water repellent was BS1306 water repellent (south beijing chime sea trade ltd).
The anti-condensation coating comprises the following components in parts by weight:
30-50 parts of water, 0.2-0.4 part of bentonite, 0.1-0.3 part of multifunctional auxiliary agent, 0.3-0.6 part of dispersing agent, 0.3-0.6 part of defoaming agent, 1-3 parts of mildew-proof and algae-proof agent, 5-10 parts of titanium dioxide, 15-20 parts of heat-insulating material, 3-5 parts of mica powder, 5-15 parts of heavy calcium carbonate, 20-40 parts of mixed emulsion, 1-1.5 parts of film-forming auxiliary agent, 1-1.5 parts of antifreezing agent and 1-5 parts of waterproof agent.
The preparation method of the anti-condensation coating specifically comprises the following steps:
the method comprises the following steps: adding water into a container, stirring, and adding bentonite;
step two: after the solution is uniform and thickened, adding the multifunctional auxiliary agent, the dispersing agent, the defoaming agent and the mildew-proof algaecide and uniformly stirring;
step three: slowly adding titanium dioxide, mica powder and coarse whiting into the mixture obtained in the second step, and highly dispersing until the mixture is uniform;
step four: adding pure acrylic emulsion and silicone resin emulsion and mixing uniformly;
step five: adding a heat insulating material and uniformly mixing;
step six: adding the film forming assistant, the antifreezing agent and the waterproofing agent, and uniformly stirring to obtain a finished product.
The preparation of the heat insulation material is as follows: and uniformly mixing the microbeads and the aerogel slurry according to the proportion to obtain the heat-insulating material.
Example 1
The anti-condensation coating in the embodiment comprises the following components in parts by weight:
37 parts of water, 0.4 part of bentonite, 0.3 part of multifunctional auxiliary agent, 0.5 part of dispersing agent, 0.5 part of defoaming agent, 0.3 part of mildew-proof and algae-proof agent, 8 parts of titanium dioxide, 8 parts of hollow glass microsphere, 2 parts of floating bead, 5 parts of aerogel slurry, 3 parts of mica powder, 6 parts of heavy calcium carbonate, 16 parts of pure acrylic emulsion, 8 parts of silicone resin emulsion, 1 part of film-forming auxiliary agent, 1 part of antifreezing agent and 5 parts of waterproof agent.
Example 2
The anti-condensation coating in the embodiment comprises the following components in parts by weight:
30.3 parts of water, 0.4 part of bentonite, 0.2 part of multifunctional auxiliary agent, 0.4 part of dispersing agent, 0.4 part of defoaming agent, 0.3 part of mildew-proof and algae-proof agent, 8 parts of titanium dioxide, 14 parts of hollow glass beads, 3 parts of aerogel slurry, 3 parts of mica powder, 7 parts of heavy calcium carbonate, 18 parts of pure acrylic emulsion, 9 parts of silicone resin emulsion, 1.5 parts of film-forming auxiliary agent, 1.5 parts of antifreezing agent and 3 parts of waterproof agent.
Example 3
The anti-condensation coating in the embodiment comprises the following components in parts by weight:
31 parts of water, 0.3 part of bentonite, 0.2 part of multifunctional auxiliary agent, 0.6 part of dispersing agent, 0.4 part of defoaming agent, 0.3 part of mildew-proof and algae-proof agent, 5 parts of titanium dioxide, 2 parts of hollow glass beads, 10 parts of floating beads, 6 parts of aerogel slurry, 5 parts of mica powder, 5 parts of heavy calcium carbonate, 20 parts of pure acrylic emulsion, 10 parts of silicone resin emulsion, 1.1 parts of film-forming auxiliary agent, 1.1 parts of antifreezing agent and 2 parts of waterproof agent.
Comparative example 1
Comparative example 1 is substantially the same as example 1 in composition and ratio, except that: the moisture condensation preventing coating has no heat insulating material, i.e. hollow glass bead, floating bead and aerogel slurry, and the weight parts of the hollow glass bead, the floating bead and the aerogel slurry are replaced by heavy calcium carbonate.
Comparative example 2
Comparative example 2 is substantially the same as example 2 in composition and ratio, except that: the anti-dewing coating is free of silicone resin emulsion, and the weight parts of the silicone resin emulsion are replaced by pure acrylic emulsion.
Comparative example 3
Comparative example 3 is substantially the same as example 3 in composition and ratio, except that: the heat insulating material in the anti-condensation coating only uses the micro-beads and does not contain aerogel slurry, and the micro-beads are used for replacing the heat insulating material in parts by weight.
Comparative example 4
Comparative example 4 is substantially the same as example 3 in composition and ratio, except that: the heat insulation material in the anti-condensation coating only uses aerogel slurry and does not contain microbeads, and the aerogel slurry is used for replacing the heat insulation material in parts by weight.
Example 5
The anti-condensation coating of examples 1 to 3 and the coating of comparative examples 1 to 2 were applied to the surface of an aluminum plate of 200mm by 2mm by a painting treatment: cleaning and polishing greasy dirt impurities on the surface of an aluminum plate, coating, wherein the thickness of a coating film is 2mm, and testing the basic performance of the coating after 7 days of maintenance. The test items and results are shown in Table 1.
TABLE 1 test results
The results in table 1 show that the anti-dewing coatings prepared in examples 1 to 3 have the most excellent properties, excellent water resistance and alkali resistance, and can protect the coating from water and alkaline materials, and the higher stain resistance can prevent the coating from being polluted and easily cleaned. The aerogel slurry is adopted to achieve better heat insulation temperature difference and heat conductivity coefficient, and the form of compounding the microbeads and the aerogel slurry can also better exert the heat insulation effect so as to prevent dewing and realize better economic price. The silicone resin is added to improve the water vapor transmission rate of the coating and the contact angle of the surface of a paint film, so that the lotus leaf self-cleaning effect and the air permeability effect are achieved, the adhesion and the durability of the coating are improved, and the penetration of external water is prevented. Through the effective combination of the heat insulation material and the functional emulsion, the coating has better adhesive force and durability, the anti-condensation and heat insulation effects are realized for a long time, the problems of energy conservation, safety and environmental protection of buildings are solved, and the functional price of the coating meets the requirements of people. Compared with the prior art, the invention has the beneficial effects that:
1. the anti-dewing coating disclosed by the invention can reduce the temperature difference between the surface of the wall and the air so as to prevent the surface of the wall from dewing aiming at the reasons caused by dewing, also solves the problems of moisture saturation, moisture absorption expansion and adhesion reduction of the traditional anti-dewing coating caused by moisture absorption of the water vapor in the air, improves the long-term use effect of the coating, solves the potential safety hazard caused by moisture absorption expansion, effectively inhibits the growth of microorganisms such as mould and the like, and improves the beautiful effect of the coating without mildewing.
2. The emulsion adopted by the anti-condensation coating combines the water resistance and excellent physical property of the pure acrylic waterproof emulsion and the air permeability and hydrophobicity of the silicone resin emulsion, so that the coating has better physical property and is not easy to damage, the anti-condensation coating has the waterproof and lotus leaf self-cleaning effects and can prevent external water from invading, the air permeability can allow moisture in concrete to permeate out, and the coating can be prevented from hollowing and peeling.
3. The anti-condensation coating disclosed by the invention has excellent anti-condensation performance, and simultaneously has a lower heat conductivity coefficient to achieve better heat insulation performance. Compared with the traditional materials such as foamed polyurethane, polystyrene board and the like, the coating has reduced thickness and beautiful effect, and can not absorb water to lose the heat insulation effect. The requirements of consumers on increasingly pursuing low-carbon, environment-friendly and healthy living environment are met.
4. The coating disclosed by the invention is simple to prepare, easily available in raw materials, capable of being widely produced and applied, free of large-scale machining, high in production efficiency, low in investment, convenient to construct, green, environment-friendly and pollution-free, and greatly reduces the labor cost.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (10)
1. The anti-dewing coating is characterized by comprising a mixed emulsion formed by the pure acrylic emulsion and the silicone resin emulsion and a heat insulation material formed by combining micro-beads and aerogel slurry; the mixed emulsion accounts for 20-40% of the total mass of the anti-condensation coating; the heat insulation material accounts for 15-20% of the total mass of the anti-condensation coating.
2. The anti-condensation coating according to claim 1, wherein the mass ratio of the pure acrylic emulsion to the silicone resin emulsion in the mixed emulsion is 1-3: 1.
3. The anti-condensation coating as claimed in claim 1, wherein the mass ratio of the micro-beads to the aerogel slurry in the heat insulating material is 2-6: 1.
4. The anti-dewfall coating of claim 1, wherein the beads are hollow glass beads and/or floating beads.
5. The anti-dewfall coating as claimed in claim 4, wherein the hollow glass beads are soda lime borosilicate glass having a true density of 0.20 to 0.76g/cm3The grain diameter is 2-130 μm; the particle size of the floating beads is less than 0.1 mm.
6. The anti-condensation coating as claimed in claim 1, wherein the aerogel slurry is formed by dispersing aerogel particles in liquid, and the solid content of the aerogel particles in the aerogel slurry is 10-15%.
7. The anti-dewing coating as claimed in claim 6, wherein the aerogel particles have a particle size of 15 to 50 μm and the aerogel slurry has a density of 200 to 350kg/m3。
8. The anti-dewfall coating of claim 1, wherein the silicone emulsion is a water-reducible silicone emulsion.
9. The anti-condensation coating according to claim 1, characterized in that it comprises the following raw material components in parts by weight: 20-40 parts of water, 0.2-0.4 part of bentonite, 0.1-0.3 part of multifunctional auxiliary agent, 0.3-0.6 part of dispersing agent, 0.3-0.6 part of defoaming agent, 0.1-0.3 part of mildew-proof and algae-proof agent, 5-10 parts of titanium dioxide, 15-20 parts of heat-insulating material, 3-5 parts of mica powder, 5-15 parts of heavy calcium carbonate, 20-40 parts of mixed emulsion, 1-1.5 parts of film-forming auxiliary agent, 1-1.5 parts of antifreezing agent and 1-5 parts of waterproof agent.
10. A method for preparing the dewing preventive coating as claimed in any one of claims 1 to 9, comprising the steps of: adding bentonite into water, stirring for thickening, then adding a multifunctional auxiliary agent, a dispersing agent, a defoaming agent, a mildew-proof and algae-proof agent, titanium dioxide, mica powder and heavy calcium carbonate, uniformly stirring, then adding a pure acrylic emulsion and a silicone resin emulsion, uniformly stirring, adding a heat-insulating material, uniformly mixing, finally adding a film-forming auxiliary agent, an antifreezing agent and a waterproof agent, and uniformly stirring to obtain the anti-condensation coating.
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| CN115353787A (en) * | 2022-09-19 | 2022-11-18 | 武汉多戈科技发展有限公司 | A water-based coating for energy saving, emission reduction, heat insulation and anti-condensation, and its preparation method and construction process |
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Application publication date: 20210518 |