CN112251081A - Building energy-saving coating capable of preventing condensation water from condensation - Google Patents
Building energy-saving coating capable of preventing condensation water from condensation Download PDFInfo
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- CN112251081A CN112251081A CN202011222833.4A CN202011222833A CN112251081A CN 112251081 A CN112251081 A CN 112251081A CN 202011222833 A CN202011222833 A CN 202011222833A CN 112251081 A CN112251081 A CN 112251081A
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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
- C09D123/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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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
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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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
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- 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)
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Abstract
The invention discloses a building energy-saving coating capable of preventing condensed water from condensation, which comprises the following components: the paint comprises amphiphilic modified diatomite, ethylene-propylene emulsion, water, pigment and auxiliary agent, wherein the amphiphilic modified diatomite comprises 300 parts by weight of 200-fold organic silicon, 400 parts by weight of 350-fold organic silicon, 250 parts by weight of 200-fold organic silicon, 200 parts by weight of 150-fold organic silicon and 5-10 parts by weight of auxiliary agent. When the using amount of the filler in the coating is increased, the content of micro bubbles in the coating layer is not greatly increased, so that the service life of the cured coating layer is prolonged.
Description
Technical Field
The invention relates to the technical field of coatings. In particular to a building energy-saving coating for preventing condensed water from being condensed.
Background
The anti-dewing coating usually utilizes the filler with a porous structure to absorb the condensed water so as to achieve the anti-dewing purpose, although the water absorption amount of the coating layer can be increased by increasing the using amount of the filler, so that the anti-dewing function of the condensed water is improved, the bonding force among filler particles is reduced by using a large amount of the filler, micro bubbles exist in the coating layer, the cured coating layer has defects, the service life of the coating layer is shortened, and particularly, the coating layer is damaged more easily after the filler absorbs water and expands.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide the building energy-saving coating capable of preventing condensed water from dewing, so that the content of micro bubbles in the coating layer is not greatly increased when the using amount of the filler is increased, and the service life of the cured coating layer is prolonged.
In order to solve the technical problems, the invention provides the following technical scheme:
an energy-saving building coating capable of preventing condensed water from condensation consists of the following components: amphiphilic modified diatomite, ethylene-propylene emulsion, water, pigment and auxiliary agent.
The building energy-saving coating for preventing condensation water from condensation comprises 300 parts by weight of 200-containing amphiphilic modified diatomite, 400 parts by weight of 350-containing ethylene-propylene emulsion, 250 parts by weight of 200-containing water, 200 parts by weight of 150-containing pigment and 5-10 parts by weight of auxiliary agent.
The building energy-saving coating capable of preventing condensation water from condensation is characterized in that the auxiliary agent is composed of a defoaming agent, a dispersing agent, a thickening agent, a flatting agent and an antibacterial agent, and the pigment is titanium dioxide.
The building energy-saving coating for preventing condensation water from condensation comprises 1-2 parts by weight of defoaming agent, 1-2 parts by weight of dispersing agent, 1-2 parts by weight of thickening agent, 1-2 parts by weight of flatting agent and 1-2 parts by weight of antibacterial agent.
The amphiphilic modified diatomite of the building energy-saving coating for preventing condensed water from dewing is prepared by the following steps:
(1) drying the diatomite;
(2) adding the dried diatomite into a sodium alginate solution while the diatomite is hot, fully stirring, separating out the diatomite, and drying the diatomite to be semi-dry to obtain semi-dry diatomite;
(3) adding the semi-dry diatomite obtained in the step (2) into a mixer while the semi-dry diatomite is hot, then adding a silane coupling agent, and fully stirring;
(4) adding stearic acid into a mixer, fully stirring, gradually cooling to 40-50 ℃, and vacuum drying until the water content of the diatomite is reduced to below 1 wt% to obtain the amphiphilic modified diatomite.
The building energy-saving coating for preventing condensation water from condensation comprises the following steps of (1): the drying temperature is 100-300 ℃, and the drying is carried out until the water content of the diatomite is reduced to be below 0.1 wt%.
The building energy-saving coating for preventing condensation water from condensation comprises the following steps of (2): the concentration of the sodium alginate in the sodium alginate solution is 0.5-2.5 wt%, the stirring time is 5-30min, the drying temperature is 80-100 ℃, and the water content of the semi-dry diatomite is 20-60 wt%.
The building energy-saving coating for preventing condensation water from condensation comprises the following steps of (3): the adding amount of the silane coupling agent is 0.1-0.3 wt% of the mass of the diatomite, and the material temperature in the mixer is kept at 70-80 ℃.
The building energy-saving coating for preventing condensation water from condensation comprises the following steps of (4): the addition amount of the stearic acid is 0.5-1.0 wt% of the weight of the diatomite, and the cooling rate is 0.5-1 ℃/min.
The silane coupling agent is KH550, KH560 or KH 570.
The technical scheme of the invention achieves the following beneficial technical effects: according to the invention, hydrophilic sodium alginate is introduced into micropores of the diatomite, a hydrophobic stearic acid is coated on the surface of the diatomite by utilizing the cohesiveness of the sodium alginate and the amphiphilic property of a silane coupling agent, and water vapor overflows from the diatomite to the outside at a certain temperature to open a conduction channel between the micropores of the diatomite and the outside, so that the hydrophilic modification of the inner wall of the micropores of the diatomite is realized, the local hydrophobic modification of the surface of the diatomite is realized, and the original rich micropore structure of the diatomite which is conducted with the outside is also reserved. Therefore, the amphiphilic modified diatomite can be well fused with hydrophilic molecules and hydrophobic molecules in the coating, and hydrophilic small molecules can enter a microporous structure of the diatomite more easily; when the usage amount of the diatomite is increased in the coating, the content of micro bubbles in the coating cannot be increased; after the coating layer is solidified, the local hydrophobic modified structure on the surface of the diatomite can increase the contact angle with water drops, so that condensation water formed on the surface of the water vapor coating layer is more difficult to form and dew; when the moisture is condensed, the original abundant microporous structure communicated with the outside of the reserved diatomite can still adsorb a large amount of water drops, and the sodium alginate on the wall of the microporous hole plays a role in guiding the flow to the inside of the diatomite, so that the water can be quickly adsorbed to the inside of the diatomite.
The diatomite is dried at 100-300 ℃ until the water content of the diatomite is reduced to 0.1 wt%, and then the diatomite is added into the sodium alginate solution while the diatomite is hot, so that water around diatomite particles is vaporized instantly, and the sodium alginate solution can be pushed into a larger micropore structure of the diatomite by the instant gas pressure, thereby creating a precondition for hydrophilic modification of a larger micropore inner wall.
The semi-dry diatom is internally provided with a certain water content, when the surface of the diatomite is subjected to hydrophobic modification, the water inside the diatomite is continuously evaporated and overflows outwards, so that the small microporous structure inside the diatomite is ensured to be communicated with the outside through the large microporous structure, the surface of the diatomite and the inner wall of the large microporous structure are prevented from being completely coated, and the characteristic of strong water absorption of the diatomite can be still exerted after the coating layer is dried.
The caking property of the sodium alginate at the temperature of more than 80 ℃ is greatly reduced, so that the sodium alginate is dried at the temperature of 80-100 ℃, has certain fluidity and can permeate into a connecting channel between a large microporous structure and a small microporous structure of the diatomite as far as possible, and a foundation is laid for conveying water from the large microporous structure to the small microporous structure after the coating layer is cured.
The melting point of stearic acid is higher than 60 ℃, the temperature is gradually reduced from 70-80 ℃ to 40-50 ℃ in the process of the hydrophobic modification of the surface of the diatomite, so that the compound formed by the sodium alginate, the stearic acid, the sodium alginate, the silane coupling agent and the stearic acid can be solidified or semi-solidified and adhered to a fixed position on the diatomite in the process of the evaporation and overflow of the water in the diatomite, a water vapor channel is not blocked, and the microporous structure of the diatomite can be always kept in communication with the outside.
In addition, the coating of the invention also has the advantage of low heat conductivity coefficient, and can also play a role in heat preservation and energy conservation when being sprayed on buildings.
Detailed Description
Example 1
The building energy-saving coating for preventing condensation water from condensation consists of the following components: the paint consists of amphiphilic modified diatomite, ethylene-propylene emulsion, water, pigment and an auxiliary agent; 300g of amphiphilic modified diatomite, 350g of ethylene-propylene emulsion, 250g of water, 150g of pigment and 10g of auxiliary agent; the auxiliary agent consists of a defoaming agent, a dispersing agent, a thickening agent, a flatting agent and an antibacterial agent, and the pigment is titanium dioxide; the defoaming agent may be a commercially available defoaming agent such as polydimethylsiloxane or polyglycol ether, the dispersant may be a commercially available defoaming agent such as ethylene glycol, acrylic acid, or methyl methacrylate, the thickener may be a commercially available thickener such as cellulose or dibenzylidene sorbitol, the leveling agent may be a commercially available leveling agent such as styrene-butadiene rubber or tetrasodium pyrophosphate, and the antibacterial agent may be a commercially available antibacterial agent such as zinc pyrithione. In this example, the defoaming agent was 2g, the dispersant was 2g, the thickener was 2g, the leveling agent was 2g, and the antibacterial agent was 2 g. The amphiphilic modified diatomite in the embodiment is prepared by the following steps:
(1) drying the diatomite at the temperature of 200 ℃ until the water content of the diatomite is reduced to be below 0.1 wt%;
(2) adding the dried diatomite into a sodium alginate solution with the concentration of 1 wt% of sodium alginate while the diatomite is hot, stirring for 10min, filtering, separating out the diatomite, and drying the diatomite at 100 ℃ until the water content is 40 wt% to obtain semi-dry diatomite;
(3) adding the half-dry diatomite obtained in the step (2) into a mixer while the half-dry diatomite is hot, then adding a silane coupling agent KH550 (gamma-aminopropyltriethoxysilane), wherein the adding amount of the silane coupling agent is 0.2 wt% of the mass of the diatomite, keeping the temperature of the materials in the mixer at 80 ℃, and fully stirring;
(4) adding stearic acid into a mixer, wherein the adding amount of the stearic acid is 0.8 wt% of the mass of the diatomite, fully stirring, gradually cooling to 40-50 ℃ at the speed of 0.5 ℃/min, and performing vacuum drying until the water content of the diatomite is reduced to below 1 wt%, thus obtaining the amphiphilic modified diatomite.
After the coating of the embodiment is prepared, the coating is kept stand for 72 hours, no micro-bubbles visible to naked eyes exist in the coating, and no micro-bubbles visible to naked eyes exist in the coating after spraying, so that the service life of the coating is prolonged.
Example 2 (this example differs from example 1 in that the amount of amphiphilic modified diatomaceous earth used is reduced)
The building energy-saving coating for preventing condensation water from condensation consists of the following components: the paint consists of amphiphilic modified diatomite, ethylene-propylene emulsion, water, pigment and an auxiliary agent; 200g of amphiphilic modified diatomite, 350g of ethylene-propylene emulsion, 250g of water, 150g of pigment and 10g of auxiliary agent; the auxiliary agent consists of a defoaming agent, a dispersing agent, a thickening agent, a flatting agent and an antibacterial agent, and the pigment is titanium dioxide; the defoaming agent may be a commercially available defoaming agent such as polydimethylsiloxane or polyglycol ether, the dispersant may be a commercially available defoaming agent such as ethylene glycol, acrylic acid, or methyl methacrylate, the thickener may be a commercially available thickener such as cellulose or dibenzylidene sorbitol, the leveling agent may be a commercially available leveling agent such as styrene-butadiene rubber or tetrasodium pyrophosphate, and the antibacterial agent may be a commercially available antibacterial agent such as zinc pyrithione. In this example, the defoaming agent was 2g, the dispersant was 2g, the thickener was 2g, the leveling agent was 2g, and the antibacterial agent was 2 g. The amphiphilic modified diatomite in the embodiment is prepared by the following steps:
(1) drying the diatomite at the temperature of 200 ℃ until the water content of the diatomite is reduced to be below 0.1 wt%;
(2) adding the dried diatomite into a sodium alginate solution with the concentration of 1 wt% of sodium alginate while the diatomite is hot, stirring for 10min, filtering, separating out the diatomite, and drying the diatomite at 100 ℃ until the water content is 40 wt% to obtain semi-dry diatomite;
(3) adding the half-dry diatomite obtained in the step (2) into a mixer while the half-dry diatomite is hot, then adding a silane coupling agent KH550 (gamma-aminopropyltriethoxysilane), wherein the adding amount of the silane coupling agent is 0.2 wt% of the mass of the diatomite, keeping the temperature of the materials in the mixer at 80 ℃, and fully stirring;
(4) adding stearic acid into a mixer, wherein the adding amount of the stearic acid is 0.8 wt% of the mass of the diatomite, fully stirring, gradually cooling to 40-50 ℃ at the speed of 0.5 ℃/min, and performing vacuum drying until the water content of the diatomite is reduced to below 1 wt%, thus obtaining the amphiphilic modified diatomite.
After the coating of the embodiment is prepared, the coating is kept stand for 72 hours, no micro-bubbles visible to naked eyes exist in the coating, and no micro-bubbles visible to naked eyes exist in the coating after spraying, so that the service life of the coating is prolonged.
From example 1 and example 2 it can be seen that: the use amount of the amphiphilic modified diatomite is increased, so that the increase of micro bubbles in the coating layer is avoided, the capability of adsorbing condensed water in the coating layer can be improved by increasing the use amount of the amphiphilic modified diatomite when the coating is prepared, and the condensation prevention capability is improved.
Comparative example 1
The building energy-saving coating for preventing condensation water from condensation consists of the following components: amphiphilic modified diatomite, ethylene-propylene emulsion, water, pigment and auxiliary agent. 300g of kieselguhr (commercially available), 350g of ethylene-propylene emulsion, 250g of water, 150g of pigment and 10g of auxiliary agent. The auxiliary agent consists of a defoaming agent, a dispersing agent, a thickening agent, a flatting agent and an antibacterial agent, and the pigment is titanium dioxide. 2g of defoaming agent, 2g of dispersing agent, 2g of thickening agent, 2g of flatting agent and 2g of antibacterial agent.
After the coating of the embodiment is prepared and stands for 72 hours, macroscopic micro bubbles still exist in the coating, the number of the macroscopic micro bubbles in each cubic centimeter of the coating is 2, and the maximum bubble diameter is about 2.5 mm; and the micro bubbles still stay in the coating layer after spraying, which affects the service life of the coating layer.
Comparative example 2
The building energy-saving coating for preventing condensation water from condensation consists of the following components: amphiphilic modified diatomite, ethylene-propylene emulsion, water, pigment and auxiliary agent. 200g of kieselguhr (commercially available), 350g of ethylene-propylene emulsion, 250g of water, 150g of pigment and 10g of auxiliary agent. The auxiliary agent consists of a defoaming agent, a dispersing agent, a thickening agent, a flatting agent and an antibacterial agent, and the pigment is titanium dioxide. 2g of defoaming agent, 2g of dispersing agent, 2g of thickening agent, 2g of flatting agent and 2g of antibacterial agent.
After the coating of the embodiment is prepared and stands for 72 hours, macroscopic micro bubbles still exist in the coating, the macroscopic micro bubbles in each cubic centimeter of the coating are 1, and the maximum bubble diameter is about 1.5 mm; and the micro bubbles still stay in the coating layer after spraying, which affects the service life of the coating layer.
As can be seen from comparative examples 1 and 2: the increase in the amount of commercially available diatomaceous earth used in the coating results in an increase in the amount of fine bubbles in the coating, thereby reducing the service life of the coating layer.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are possible which remain within the scope of the appended claims.
Claims (10)
1. The building energy-saving coating capable of preventing condensation water from condensation is characterized by comprising the following components: amphiphilic modified diatomite, ethylene-propylene emulsion, water, pigment and auxiliary agent.
2. The building energy-saving coating for preventing condensed water condensation as claimed in claim 1, wherein the amphiphilic modified diatomite comprises 300 parts by weight of 200-400 parts by weight of ethylene propylene emulsion, 200-250 parts by weight of water, 150-200 parts by weight of pigment and 5-10 parts by weight of auxiliary agent.
3. The building energy-saving paint capable of preventing condensation water from forming dew as claimed in claim 1, wherein the auxiliary agent is composed of a defoaming agent, a dispersing agent, a thickening agent, a leveling agent and an antibacterial agent, and the pigment is titanium dioxide.
4. The building energy-saving coating for preventing condensation water from being condensed according to claim 1, wherein the defoaming agent is 1 to 2 parts by weight, the dispersing agent is 1 to 2 parts by weight, the thickening agent is 1 to 2 parts by weight, the leveling agent is 1 to 2 parts by weight, and the antibacterial agent is 1 to 2 parts by weight.
5. The building energy-saving coating for preventing condensed water from condensation as claimed in any one of claims 1 to 4, wherein the amphiphilic modified diatomite is prepared by the following steps:
(1) drying the diatomite;
(2) adding the dried diatomite into a sodium alginate solution while the diatomite is hot, fully stirring, separating out the diatomite, and drying the diatomite to be semi-dry to obtain semi-dry diatomite;
(3) adding the semi-dry diatomite obtained in the step (2) into a mixer while the semi-dry diatomite is hot, then adding a silane coupling agent, and fully stirring;
(4) adding stearic acid into a mixer, fully stirring, gradually cooling to 40-50 ℃, and vacuum drying until the water content of the diatomite is reduced to below 1 wt% to obtain the amphiphilic modified diatomite.
6. The building energy-saving coating material preventing condensation of water according to claim 5, wherein in the step (1): the drying temperature is 100-300 ℃, and the drying is carried out until the water content of the diatomite is reduced to be below 0.1 wt%.
7. The building energy-saving coating material preventing condensation of water according to claim 5, wherein in the step (2): the concentration of the sodium alginate in the sodium alginate solution is 0.5-2.5 wt%, the stirring time is 5-30min, the drying temperature is 80-100 ℃, and the water content of the semi-dry diatomite is 20-60 wt%.
8. The building energy-saving coating material preventing condensation of water according to claim 5, wherein in the step (3): the adding amount of the silane coupling agent is 0.1-0.3 wt% of the mass of the diatomite, and the material temperature in the mixer is kept at 70-80 ℃.
9. The building energy-saving coating material preventing condensation of water according to claim 5, wherein in the step (4): the addition amount of the stearic acid is 0.5-1.0 wt% of the weight of the diatomite, and the cooling rate is 0.5-1 ℃/min.
10. The building energy-saving coating for preventing condensation water from condensation as claimed in claim 5, wherein the silane coupling agent is KH550, KH560 or KH 570.
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| CN202011222833.4A CN112251081B (en) | 2020-11-05 | 2020-11-05 | Building energy-saving coating capable of preventing condensation water from condensation |
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| CN202011222833.4A CN112251081B (en) | 2020-11-05 | 2020-11-05 | Building energy-saving coating capable of preventing condensation water from condensation |
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