CN116694209A - Heat insulation coating and preparation method thereof - Google Patents
Heat insulation coating and preparation method thereof Download PDFInfo
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- CN116694209A CN116694209A CN202310589111.XA CN202310589111A CN116694209A CN 116694209 A CN116694209 A CN 116694209A CN 202310589111 A CN202310589111 A CN 202310589111A CN 116694209 A CN116694209 A CN 116694209A
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- capsule filler
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- 238000000576 coating method Methods 0.000 title claims abstract description 91
- 238000002360 preparation method Methods 0.000 title claims abstract description 85
- 239000011248 coating agent Substances 0.000 title claims abstract description 79
- 238000009413 insulation Methods 0.000 title abstract description 47
- 239000002775 capsule Substances 0.000 claims abstract description 124
- 239000000945 filler Substances 0.000 claims abstract description 119
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims abstract description 57
- 238000002156 mixing Methods 0.000 claims abstract description 48
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 40
- 238000003756 stirring Methods 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 17
- 229920005862 polyol Polymers 0.000 claims abstract description 14
- 150000003077 polyols Chemical class 0.000 claims abstract description 14
- 239000002270 dispersing agent Substances 0.000 claims abstract description 10
- 239000012948 isocyanate Substances 0.000 claims abstract description 10
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 10
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 7
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 40
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 24
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims description 24
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims description 24
- 239000001099 ammonium carbonate Substances 0.000 claims description 24
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 20
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- GANNOFFDYMSBSZ-UHFFFAOYSA-N [AlH3].[Mg] Chemical class [AlH3].[Mg] GANNOFFDYMSBSZ-UHFFFAOYSA-N 0.000 claims description 18
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 239000000440 bentonite Substances 0.000 claims description 11
- 229910000278 bentonite Inorganic materials 0.000 claims description 11
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 11
- 239000011787 zinc oxide Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 7
- -1 -isopropyl phenyl ester Chemical class 0.000 claims description 6
- WPYDWXNELIOALD-UHFFFAOYSA-N C(=O)O.C(C)(C)C1=C(C=CC=C1)NC Chemical compound C(=O)O.C(C)(C)C1=C(C=CC=C1)NC WPYDWXNELIOALD-UHFFFAOYSA-N 0.000 claims description 6
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 claims description 6
- 239000003960 organic solvent Substances 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 5
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 4
- 229910000410 antimony oxide Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 claims description 3
- 150000005846 sugar alcohols Polymers 0.000 claims description 2
- 239000012720 thermal barrier coating Substances 0.000 claims 1
- 239000003973 paint Substances 0.000 abstract description 8
- 230000000052 comparative effect Effects 0.000 description 9
- 230000014759 maintenance of location Effects 0.000 description 8
- 239000007787 solid Substances 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 7
- 239000004964 aerogel Substances 0.000 description 6
- 238000011109 contamination Methods 0.000 description 6
- 238000007405 data analysis Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- GBMDVOWEEQVZKZ-UHFFFAOYSA-N methanol;hydrate Chemical compound O.OC GBMDVOWEEQVZKZ-UHFFFAOYSA-N 0.000 description 4
- 239000004965 Silica aerogel Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- XXLJGBGJDROPKW-UHFFFAOYSA-N antimony;oxotin Chemical compound [Sb].[Sn]=O XXLJGBGJDROPKW-UHFFFAOYSA-N 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- QBSJMKIUCUGGNG-UHFFFAOYSA-N isoprocarb Chemical compound CNC(=O)OC1=CC=CC=C1C(C)C QBSJMKIUCUGGNG-UHFFFAOYSA-N 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 229920000538 Poly[(phenyl isocyanate)-co-formaldehyde] Polymers 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- 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
-
- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/90—Passive houses; Double facade technology
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The application relates to the technical field of coatings, and particularly discloses a heat-insulating coating and a preparation method thereof. A heat-insulating paint is prepared by mixing a component A and a component B; the component A comprises 25-60 parts of isocyanate curing agent; the component B comprises 32-45 parts of polyol, 20-40 parts of capsule filler, 1-3 parts of dispersing agent and 2-4 parts of defoaming agent; the capsule filler comprises a capsule core and a wall material, wherein the capsule core is a reflective nano oxide, and the wall material is magnesium aluminum silicate inorganic gel with a porous structure; the preparation method comprises the following steps: stirring and mixing the capsule filler and the polyol, adding a dispersing agent and a defoaming agent, and stirring and mixing to obtain a component B; and stirring and mixing the component B and the isocyanate curing agent to obtain the heat-insulating coating. The capsule filler has good dispersibility, can improve the heat insulation performance of the heat insulation coating and reduce the cost of the heat insulation coating.
Description
Technical Field
The application relates to the technical field of coatings, in particular to a heat-insulating coating and a preparation method thereof.
Background
Building thermal insulation is an important aspect of energy conservation, living environment improvement and use function. The proportion of the energy consumption of the building in the whole energy consumption of human is generally 30-40%, and most of the energy consumption is the energy consumption of heating and air conditioning, so the building energy saving significance is great.
The heat-insulating paint is coated on the surface to be constructed, and then insulates the surface to be constructed in a mode of blocking heat conduction, reflecting sunlight or radiating solar heat, and the like, so that the heat-insulating effect is achieved. Therefore, the coating of the heat-insulating coating on the outer side of the building is one measure for realizing heat insulation of the building.
Because aerogels have a high specific surface area and an extremely low thermal conductivity, aerogels have been widely used as thermal insulation materials for preparing thermal insulation coatings. However, the price of aerogel is high at present, which increases the cost of the coating.
Disclosure of Invention
In order to improve the heat insulation performance of the coating and reduce the cost of the coating, the application provides the heat insulation coating and a preparation method thereof.
In a first aspect, the present application provides a heat-insulating coating, which adopts the following technical scheme:
a heat-insulating paint is prepared by mixing a component A and a component B;
the component A comprises the following components in parts by weight:
25-60 parts of isocyanate curing agent;
the component B comprises the following components in parts by weight:
32-45 parts of polyalcohol;
20-40 parts of capsule filler;
1-3 parts of dispersing agent;
2-4 parts of defoaming agent;
the capsule filler comprises a capsule core and a wall material, wherein the capsule core is a reflective nano oxide, and the wall material is magnesium aluminum silicate inorganic gel with a porous structure.
By adopting the technical scheme, transparent magnesium aluminum silicate inorganic gel is firstly adopted to coat the reflective nano oxide, and then the magnesium aluminum silicate inorganic gel is subjected to pore-forming to obtain the capsule filler with the porous structure. Then, the capsule filler with a porous structure is added into other components such as polyol, defoamer and dispersant, on one hand, because the surface of the capsule filler has a porous structure, pores exist between the capsule filler and each component, which is beneficial to weakening the acting force between the capsule filler and each component, improving the dispersibility of the capsule filler between each component and improving the efficiency of reflecting sunlight. On the other hand, when the reflective nano-oxide in the capsule filler reflects sunlight, the porous structure on the surface of part of the capsule filler can reflect and refract the sunlight, so that the reflection path of the sunlight is increased, and the heat dissipation efficiency of the sunlight is improved. Meanwhile, the cost of the reflective nano-oxide and the magnesium aluminum silicate inorganic gel is compatible with that of the aerogel. Therefore, the cost of the heat insulation coating can be reduced by adopting the capsule filler to replace aerogel.
Preferably, the preparation method of the capsule filler comprises the following preparation steps:
a1: adding organic bentonite into an organic solvent and water, and stirring and mixing to obtain magnesium aluminum silicate inorganic gel;
a2: adding the reflective nano-oxide and the pore-forming agent into the magnesium aluminum silicate inorganic gel, stirring, mixing, drying and roasting to obtain the capsule filler of the porous structure of the magnesium aluminum silicate inorganic gel coated with the reflective nano-oxide.
By adopting the technical scheme, firstly, organic bentonite is added into an organic solvent and water to be swelled, so that transparent magnesium aluminum silicate inorganic gel is obtained, then, the reflective nano-oxide and the pore-forming agent are added into the transparent magnesium aluminum silicate inorganic gel, and the reflective nano-oxide and the pore-forming agent are promoted to be dispersed in the transparent magnesium aluminum silicate inorganic gel by stirring, so that the transparent magnesium aluminum silicate inorganic gel coats the mixture of the reflective nano-oxide and the pore-forming agent. Finally, the organic solvent and water are removed by drying, and then the pore-forming agent is volatilized by roasting, so that the obtained capsule filler is the porous magnesium aluminum silicate inorganic gel coated reflective nano oxide. The capsule filler prepared by the preparation method has higher coating property and higher porosity, is beneficial to improving the dispersibility of the capsule filler among the components and improves the efficiency of reflecting sunlight. Meanwhile, the reflection path of sunlight is increased, and the heat dissipation efficiency of the sunlight is improved.
Preferably, in the preparation method of the capsule filler, the magnesium aluminum silicate inorganic gel, the reflective nano oxide and the pore-forming agent are mixed according to the weight ratio of 1 (0.3-0.7) to 0.06-0.1.
By adopting the technical scheme, the obtained capsule filler has better coating property and higher porosity, is beneficial to improving the dispersibility of the capsule filler in the coating component, and further improves the heat insulation effect of the coating.
Preferably, the reflective nano-oxide includes one or more of nano-zinc oxide, nano-tin antimony oxide, and nano-titanium dioxide.
By adopting the technical scheme, the nano-oxides have good capability of shielding infrared rays and ultraviolet rays and reflecting sunlight. Therefore, the coating prepared by the capsule filler containing the nano oxide has higher sunlight reflecting efficiency.
Preferably, the pore-forming agent is one or more of sodium bicarbonate, ammonium bicarbonate and activated carbon.
By adopting the technical scheme, the sodium bicarbonate, the ammonium bicarbonate and the activated carbon have good dispersibility in the magnesium aluminum silicate inorganic gel. Therefore, one or more of sodium bicarbonate, ammonium bicarbonate and active carbon are adopted to pore the magnesium aluminum silicate inorganic gel, the porosity of the obtained magnesium aluminum silicate inorganic gel is higher, the acting force among the components is weakened, the dispersibility of the capsule filler among the components is improved, and the efficiency of the coating for reflecting sunlight is improved. Meanwhile, the capsule filler with higher porosity increases the reflection path of sunlight and improves the heat dissipation efficiency of the sunlight.
Preferably, the pore-forming agent is formed by mixing sodium bicarbonate and ammonium bicarbonate, and the weight ratio of the sodium bicarbonate to the ammonium bicarbonate is 1 (1-1.5).
By adopting the technical scheme, sodium bicarbonate and ammonium bicarbonate are easy to be heated and decomposed, and the pore-forming agent formed by mixing the sodium bicarbonate and the ammonium bicarbonate according to the weight ratio is added into the magnesium aluminum silicate inorganic gel, so that the pore-forming agent can be decomposed at a lower temperature to form gas, the porosity of the magnesium aluminum silicate inorganic gel is improved, the dispersibility of the capsule filler among the components is improved, and the sunlight reflecting efficiency of the coating is improved.
Preferably, the magnesium aluminum silicate inorganic gel is modified magnesium aluminum silicate inorganic gel, and the preparation method of the capsule filler comprises the following preparation steps:
a1: adding organic bentonite into an organic solvent and water, and stirring and mixing to obtain magnesium aluminum silicate inorganic gel; adding methylamine formic acid-2-isopropyl phenyl ester into the magnesium aluminum silicate inorganic gel, stirring, mixing and aging to obtain modified magnesium aluminum silicate inorganic gel;
a2: adding the reflective nano-oxide and the pore-forming agent into the modified magnesium aluminum silicate inorganic gel, stirring, mixing, drying and roasting to obtain the capsule filler of the porous modified magnesium aluminum silicate inorganic gel coated with the reflective nano-oxide.
By adopting the technical scheme, the 2-isopropyl phenyl methylamine formate with certain hydrophobicity is added into the magnesium aluminum silicate inorganic gel, and after ageing, the hydrophilicity of the modified magnesium aluminum silicate inorganic gel is reduced, and the hydrophobicity of the capsule filler prepared by adopting the modified magnesium aluminum silicate inorganic gel is improved.
Preferably, in the preparation method of the capsule filler, the magnesium aluminum silicate inorganic gel and the methylamine formic acid-2-isopropyl phenyl ester are mixed according to the weight ratio of 1 (0.08-0.11).
By adopting the technical scheme, the 2-isopropyl phenyl methylaminoformate with the proportion is added into the magnesium aluminum silicate inorganic gel, and the obtained modified magnesium aluminum silicate inorganic gel has both hydrophobicity and hydrophilicity, is beneficial to improving the dispersibility of the capsule filler among the components, and is beneficial to improving the sunlight reflecting efficiency and water resistance of the coating.
In a second aspect, the application provides a preparation method of a heat insulation coating, which adopts the following technical scheme:
the preparation method of the heat-insulating coating comprises the following preparation steps:
stirring and mixing the capsule filler and the polyol, adding a dispersing agent and a defoaming agent, and stirring and mixing to obtain a component B; and stirring and mixing the component B and the isocyanate curing agent to obtain the heat-insulating coating.
By adopting the technical scheme, the capsule filler is firstly mixed with the polyol, and then other components such as the dispersing agent and the like are added, so that the dispersibility among the components is improved, and the heat insulation effect of the coating is improved. Meanwhile, the preparation steps of the heat insulation filler are simple, and the heat insulation filler can be popularized on a large scale. Can be used for improving mechanical properties.
In summary, the application has the following beneficial effects:
1. the surface of the capsule filler adopted by the application has a porous structure, so that the gap between coating components can be increased, the acting force between the components is reduced, the dispersibility of the capsule filler among the coating components is improved, the reflective nano oxide is uniformly distributed in the coating components, and the heat insulation effect of the coating is improved;
2. in the total raw materials for preparing the capsule filler, the weight ratio of the magnesium aluminum silicate inorganic gel, the reflective nano oxide and the pore-forming agent is optimized, so that the obtained capsule filler has good coating property and high porosity, is beneficial to improving the dispersibility of the capsule filler, can increase the light reflection path and further improves the heat insulation performance of the heat insulation coating;
3. the preparation method of the heat-insulating coating has simple preparation steps, and the capsule filler is dispersed in the polyol to promote the capsule filler and the polyol to be fully mixed, so that the capsule filler is uniformly dispersed in the coating film when the polyol and the isocyanate curing agent are cured, and the heat-insulating performance of the heat-insulating coating is improved.
Detailed Description
The present application will be described in further detail with reference to examples.
The raw materials used in the examples of the present application are all commercially available except for the following specific descriptions.
Preparation example
Preparation example 1
A capsule filler comprises the following components in parts by weight:
the preparation method of the capsule filler comprises the following preparation steps:
a1: adding organic bentonite into 95% methanol water solution, stirring and mixing at 50 ℃ and 500r/min for 3 hours to obtain the magnesium aluminum silicate inorganic gel with the solid content of 10%.
In the preparation example of the application, the organic bentonite is purchased from Hebei Beijing avionics, and the product number is YJPRU.
A2: adding the reflective nano oxide and the pore-forming agent into the magnesium aluminum silicate inorganic gel with the solid content of 10%, stirring and mixing for 30min under the condition of 500r/min, drying for 2h at 100 ℃, grinding to the particle size of 20-30 mu m, and roasting for 2h at 200 ℃ to obtain the capsule filler of the porous structure magnesium aluminum silicate inorganic gel coated reflective nano oxide.
In the preparation example of the application, the reflective nano oxide is formed by mixing nano zinc oxide and nano titanium dioxide according to the weight ratio of 1:1.
The nanometer zinc oxide is white powder with particle diameter of 30nm and apparent density (80 meshes) of 1.16g/cm 3 Specific surface area 11.21m 2 And/g, the content of the effective components is 99.6%.
The nanometer titanium dioxide is white powder, the crystal form is anatase titanium, the grain diameter is 20nm, the pore-forming agent with the titanium dioxide content of 99.9 percent is formed by mixing sodium bicarbonate and ammonium bicarbonate, and the weight ratio of the sodium bicarbonate to the ammonium bicarbonate is 1:1.3.
PREPARATION EXAMPLES 2 to 5
A capsule filler differs from preparation example 1 in that the components and their weights are shown in the following table:
preparation example 6
A capsule filler is different from preparation example 1 in that the reflective nano oxide is nano tin antimony oxide, spherical, with average particle diameter of 30nm, purity of 99.9%, specific surface area of more than or equal to 90m 2 /g。
Preparation example 7
A capsule filler differs from that of preparation example 1 in that the reflective nano-oxide is nano-zinc oxide.
Preparation example 8
A capsule filler is different from preparation example 1 in that the pore-forming agent is formed by mixing sodium bicarbonate and ammonium bicarbonate, and the weight ratio of the sodium bicarbonate to the ammonium bicarbonate is 1:1.
Preparation example 9
A capsule filler is different from preparation example 1 in that the pore-forming agent is formed by mixing sodium bicarbonate and ammonium bicarbonate, and the weight ratio of the sodium bicarbonate to the ammonium bicarbonate is 1:5.
Preparation example 10
A capsule filler is different from preparation example 1 in that the pore-forming agent is activated carbon.
PREPARATION EXAMPLE 11
The capsule filler is different from the preparation example 1 in that the magnesium aluminum silicate inorganic gel is modified magnesium aluminum silicate inorganic gel, and the preparation method of the capsule filler comprises the following preparation steps:
a1: adding organic bentonite into 95% methanol water solution, stirring and mixing for 3 hours at 50 ℃ and 500r/min to obtain magnesium aluminum silicate inorganic gel with the solid content of 10%; adding methyl carbamic acid-2-isopropyl phenyl ester into magnesium aluminum silicate inorganic gel with the solid content of 10%, stirring and mixing for 1h at 30 ℃ and 500r/min, and aging for 24h at 30 ℃ to obtain modified magnesium aluminum silicate inorganic gel.
In the preparation example of the application, the weight ratio of the magnesium aluminum silicate inorganic gel to the 2-isopropyl phenyl methylamine formate is 1:0.1.
A2: adding the reflective nano oxide and the pore-forming agent into the modified magnesium aluminum silicate inorganic gel, stirring and mixing for 30min under the condition of 500r/min, drying for 2h at 100 ℃, grinding to the particle size of 10-100 mu m, and roasting for 2h at 200 ℃ to obtain the capsule filler of the reflective nano oxide coated by the porous magnesium aluminum silicate inorganic gel.
Preparation example 12
A capsule filling material is different from preparation example 11 in that in the preparation method of the capsule filling material, the weight ratio of magnesium aluminum silicate inorganic gel to methylaminoformic acid-2-isopropylphenyl ester in A1 is 1:0.08.
Preparation example 13
A capsule filler is different from preparation example 11 in that in the preparation method of the capsule filler, the weight ratio of the magnesium aluminum silicate inorganic gel to the methylaminoformic acid-2-isopropylphenyl ester in A1 is 1:0.11.
Performance detection
The heat-insulating coatings obtained in the examples and the comparative examples of the present application were subjected to heat conductivity, heat insulation and water resistance detection by the following methods:
and (3) heat conduction coefficient detection: reference is made to GB 10294-2008 "steady state thermal resistance and related Property measurement guard Hot plate method";
and (3) detecting heat insulation performance: the measurement is carried out by referring to JC/T1040-2020 heat-reflecting heat-insulating paint for building external surface and adopting flat coating;
and (3) water resistance detection: measured by referring to GB/T9755-2014 synthetic resin emulsion exterior wall paint.
Examples
Example 1
The heat insulating paint has the following raw materials and corresponding weight:
the preparation method of the heat-insulating coating comprises the following preparation steps:
dehydrating the polyol for 2 hours at 120 ℃ under the vacuum degree of-0.1 Mpa to obtain dehydrated polyol; adding the capsule filler into dehydrated polyol, stirring and mixing for 30min at 300r/min, adding the dispersing agent, the defoaming agent and the water scavenger, and stirring and mixing for 10min to obtain a component B; and stirring and mixing the component B and the isocyanate curing agent to obtain the heat-insulating coating.
In the embodiment of the application, the isocyanate curing agent is polymethylene polyphenyl isocyanate with the mark PM200, and is purchased from a cigarette holder.
The polyol was polyol Sovermol 805, purchased from basf corporation.
The capsule filler prepared in preparation example 1 is adopted.
The dispersant brand BYK163 and the defoamer brand BYK057 were purchased from Pick, germany.
Examples 2 to 3
A thermal insulation coating was different from example 1 in that the respective raw materials and their corresponding weights are shown in the following table:
the heat-insulating paint obtained in the examples 1 to 3 of the present application was subjected to heat conductivity, heat insulation and water resistance tests, and the test results are shown in the following table:
as can be seen from the data analysis of the above table, the heat-insulating paint obtained in examples 1-3 has a heat conductivity coefficient as low as 0.015-0.026W/(m.k), a hemispherical emissivity as high as 90-99%, a solar reflectance retention rate after pollution as high as 88-99%, a heat-insulating temperature difference as high as 15.8-19.3 ℃ and a water-resistant time as long as 72h. Thus, the heat-insulating coating obtained in examples 1-3 of the present application has good heat-insulating properties and water resistance.
Examples 4 to 7
A heat insulating coating material was different from example 1 in that the capsule filler was different.
In examples 4 to 5, the capsule filler was used in preparation examples and the components constituting the capsule filler and the weights thereof are shown in the following table:
the thermal conductivity and the thermal insulation property of the thermal insulation coating obtained in the embodiment 4-7 are detected, and the detection results are shown in the following table:
as is clear from the data analysis of the above tables, the heat-insulating coatings obtained in examples 1, 4 and 5 have lower heat conductivity and higher solar reflectance retention after contamination, hemispherical emissivity and heat-insulating temperature difference than the heat-insulating coatings obtained in examples 6 and 7. Therefore, in the preparation method of the capsule filler, the magnesium aluminum silicate inorganic gel, the reflective nano oxide and the pore-forming agent are mixed according to the weight ratio of 1 (0.3-0.7) to 0.06-0.1, and the obtained capsule filler can improve the heat insulation performance of the heat insulation coating.
Example 8
A heat insulating coating material was different from example 1 in that the capsule filler was different.
In the embodiment of the application, the capsule filler prepared in preparation example 6 is adopted as the capsule filler.
In preparation example 6, the reflective nano-oxide is nano-tin antimony oxide.
Example 9
A heat insulating coating material was different from example 1 in that the capsule filler was different.
In the embodiment of the application, the capsule filler prepared in preparation example 7 is adopted as the capsule filler.
In preparation example 7, the reflective nano-oxide was nano-zinc oxide.
The thermal conductivity and the thermal insulation property of the thermal insulation coating obtained in the examples 8 to 9 are detected, and the detection results are shown in the following table:
as is clear from the data analysis of the above tables, the heat-insulating coatings obtained in examples 1, 8 and 9 have a heat conductivity as low as 0.018 to 0.023W/(m.k), a solar reflectance retention after contamination as high as 92 to 96%, a hemispherical emissivity as high as 91 to 95%, and a heat-insulating temperature difference as high as 16.5 to 17.5 ℃. Therefore, in the preparation method of the capsule filler, when the reflective nano oxide comprises one or more of nano zinc oxide, nano tin antimony oxide and nano titanium dioxide, the prepared capsule filler can improve the heat insulation effect of the heat insulation coating.
Meanwhile, the heat-insulating coating obtained in example 1 has a lower heat conductivity coefficient, a higher solar reflectance retention rate after pollution, hemispherical emissivity and a heat-insulating temperature difference than the heat-insulating coatings obtained in examples 8 and 9. Therefore, in the preparation method of the capsule filler, the reflective nano oxide is formed by mixing nano zinc oxide and nano titanium dioxide according to the weight ratio of 1:1, and the obtained capsule filler can improve the heat insulation performance of the heat insulation coating.
Example 10
A heat insulating coating material was different from example 1 in that the capsule filler was different.
In the embodiment of the application, the capsule filler prepared in preparation example 8 is adopted as the capsule filler.
In preparation example 8, the pore-forming agent consists of sodium bicarbonate and ammonium bicarbonate which are mixed, and the weight ratio of the sodium bicarbonate to the ammonium bicarbonate is 1:1.
Example 11
A heat insulating coating material was different from example 1 in that the capsule filler was different.
In the embodiment of the application, the capsule filler prepared in preparation example 9 is adopted as the capsule filler.
In preparation example 9, the pore-forming agent consists of sodium bicarbonate and ammonium bicarbonate which are mixed, and the weight ratio of the sodium bicarbonate to the ammonium bicarbonate is 1:5.
Example 12
A heat insulating coating material was different from example 1 in that the capsule filler was different.
In the embodiment of the application, the capsule filler prepared in preparation example 10 is adopted as the capsule filler.
In preparation example 10, the pore-forming agent was activated carbon.
The thermal conductivity and the thermal insulation property of the thermal insulation coating obtained in the examples 10 to 12 of the present application were measured, and the measurement results are shown in the following table:
as is clear from the data analysis of the above tables, the heat-insulating coatings obtained in examples 1, 10 and 11 have heat conductivity as low as 0.018-0.021W/(m.k), solar reflectance retention after contamination as high as 93-95%, hemispherical emissivity as high as 94-96%, and heat-insulating temperature difference as high as 16.9-17.5 ℃. Therefore, in the preparation method of the capsule filler, the pore-forming agent is formed by mixing sodium bicarbonate and ammonium bicarbonate, the weight ratio of the sodium bicarbonate to the ammonium bicarbonate is 1 (1-1.5), and the heat insulation performance of the heat insulation coating can be improved.
Example 13
A heat insulating coating material was different from example 1 in that the capsule filler was different.
In the embodiment of the application, the capsule filler prepared in preparation example 11 is adopted as the capsule filler.
In preparation example 11, the magnesium aluminum silicate inorganic gel is modified magnesium aluminum silicate inorganic gel, and the preparation method of the capsule filler comprises the following preparation steps:
a1: adding organic bentonite into 95% methanol water solution, stirring and mixing for 3 hours at 50 ℃ and 500r/min to obtain magnesium aluminum silicate inorganic gel with the solid content of 10%; adding methyl carbamic acid-2-isopropyl phenyl ester into magnesium aluminum silicate inorganic gel with the solid content of 10%, stirring and mixing for 1h at 30 ℃ and 500r/min, and aging for 24h at 30 ℃ to obtain modified magnesium aluminum silicate inorganic gel.
In the preparation example of the application, the weight ratio of the magnesium aluminum silicate inorganic gel to the 2-isopropyl phenyl methylamine formate is 1:0.1.
A2: adding the reflective nano oxide and the pore-forming agent into the modified magnesium aluminum silicate inorganic gel, stirring and mixing for 30min under the condition of 500r/min, drying for 2h at 100 ℃, grinding to the particle size of 10-100 mu m, and roasting for 2h at 200 ℃ to obtain the capsule filler of the reflective nano oxide coated by the porous magnesium aluminum silicate inorganic gel.
Example 14
A heat insulating coating differing from example 13 in the capsule filler.
In the embodiment of the application, the capsule filler prepared in preparation example 12 is adopted as the capsule filler.
In preparation example 12, the weight ratio of the magnesium aluminum silicate inorganic gel to the 2-isopropyl phenyl methylamine formate in the capsule filler A1 is 1:0.08.
Example 15
A heat insulating coating differing from example 13 in the capsule filler.
In the embodiment of the application, the capsule filler prepared in preparation example 13 is adopted as the capsule filler.
In preparation example 13, the weight ratio of the magnesium aluminum silicate inorganic gel to the 2-isopropyl phenyl methylamine formate in the capsule filler in A1 is 1:0.11.
The thermal insulation coatings obtained in examples 13 to 15 of the present application were subjected to thermal conductivity, heat insulation and water resistance tests, and the test results are shown in the following table:
as can be seen from the data analysis of the above tables, the heat-insulating coatings obtained in examples 13 to 15 have lower heat conductivity and higher solar reflectance retention after contamination, hemispherical emissivity and heat-insulating temperature difference than the heat-insulating coating obtained in example 1. Therefore, in the preparation method of the capsule filler, the capsule filler prepared by adopting the modified magnesium aluminum silicate inorganic gel can improve the heat insulation performance and the water resistance of the heat insulation coating.
Comparative example
Comparative example 1
The heat insulation filler is different from the embodiment 1 in that an equal weight of reflective nano-oxide is adopted to replace the capsule filler, wherein the reflective nano-oxide is formed by mixing nano-zinc oxide and nano-titanium dioxide according to a weight ratio of 1:1.
Comparative example 2
The heat insulation filler is different from the embodiment 1 in that the capsule filler comprises a capsule core and a wall material, wherein the capsule core is a reflective nano oxide, and the wall material is magnesium aluminum silicate inorganic gel.
The preparation method of the capsule filler comprises the following preparation steps:
a1: adding organic bentonite into 95% methanol water solution, stirring and mixing at 50 ℃ and 500r/min for 3 hours to obtain the magnesium aluminum silicate inorganic gel with the solid content of 10%.
In the preparation example of the application, the organic bentonite is purchased from Hebei Beijing avionics, and the product number is YJPRU.
A2: adding the reflective nano-oxide into the magnesium aluminum silicate inorganic gel with the solid content of 10%, stirring and mixing for 30min under the condition of 500r/min, drying for 2h at 100 ℃, grinding to the particle size of 10-100 mu m, and roasting for 2h at 200 ℃ to obtain the capsule filler of the reflective nano-oxide coated by the porous magnesium aluminum silicate inorganic gel.
In the comparative example, the reflective nano oxide is formed by mixing nano zinc oxide and nano titanium dioxide according to the weight ratio of 1:1.
The pore-forming agent is formed by mixing sodium bicarbonate and ammonium bicarbonate, and the weight ratio of the sodium bicarbonate to the ammonium bicarbonate is 1:1.3.
Comparative example 3
An insulating filler was different from example 1 in that an equal weight of silica aerogel was used instead of the capsule filler, wherein the silica aerogel was an aerogel powder having a thermal conductivity of 0.018W/(m·k).
The heat-insulating coatings obtained in comparative examples 1 to 3 of the present application were subjected to heat conductivity, heat insulation and water resistance tests, and the test results are shown in the following table:
as can be seen from the data analysis of the above table, the thermal insulation coating obtained in example 1 has a thermal conductivity which is relatively reduced by 40.00-52.63%, a solar reflectance retention after contamination which is relatively increased by 10.47-44.76%, a hemispherical emissivity which is relatively increased by 11.63-12.94%, and a thermal insulation temperature difference which is relatively increased by 29.63-71.57% relative to the thermal insulation coating obtained in comparative examples 1-2. Therefore, the capsule filler is added into the total raw materials for preparing the heat-insulating coating, so that the heat-insulating performance and the water resistance of the heat-insulating coating can be improved.
The heat-insulating coating obtained in example 1 has the same coefficient of thermal conductivity as the heat-insulating coating obtained in comparative example 3, and the solar reflectance retention after contamination is similar, the hemispherical emissivity and the heat-insulating temperature difference are similar, but the water-resistant period is increased. Therefore, the capsule filler is adopted to replace the silica aerogel in the preparation total raw materials of the heat-insulating coating, and the obtained heat-insulating coating not only has good heat-insulating property, but also can reduce the cost of the heat-insulating coating and improve the water resistance of the heat-insulating coating.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (9)
1. The heat-insulating coating is characterized by being prepared by mixing a component A and a component B;
the component A comprises the following components in parts by weight:
25-60 parts of isocyanate curing agent;
the component B comprises the following components in parts by weight:
32-45 parts of polyalcohol;
20-40 parts of capsule filler;
1-3 parts of dispersing agent;
2-4 parts of defoaming agent;
the capsule filler comprises a capsule core and a wall material, wherein the capsule core is a reflective nano oxide, and the wall material is magnesium aluminum silicate inorganic gel with a porous structure.
2. The heat-insulating coating according to claim 1, wherein the preparation method of the capsule filler comprises the following preparation steps:
a1: adding organic bentonite into an organic solvent and water, and stirring and mixing to obtain magnesium aluminum silicate inorganic gel;
a2: adding the reflective nano-oxide and the pore-forming agent into the magnesium aluminum silicate inorganic gel, stirring, mixing, drying and roasting to obtain the capsule filler of the porous structure of the magnesium aluminum silicate inorganic gel coated with the reflective nano-oxide.
3. The heat-insulating coating according to claim 2, wherein in the preparation method of the capsule filler, the magnesium aluminum silicate inorganic gel, the reflective nano oxide and the pore-forming agent are mixed according to the weight ratio of 1 (0.3-0.7) (0.06-0.1).
4. The thermal barrier coating of claim 2, wherein the reflective nano-oxide comprises one or more of nano-zinc oxide, nano-tin antimony oxide, and nano-titanium dioxide.
5. The heat insulating coating of claim 2, wherein the pore-forming agent is one or more of sodium bicarbonate, ammonium bicarbonate, and activated carbon.
6. The heat-insulating coating according to claim 2, wherein the pore-forming agent is formed by mixing sodium bicarbonate and ammonium bicarbonate, and the weight ratio of the sodium bicarbonate to the ammonium bicarbonate is 1 (1-1.5).
7. The heat-insulating coating according to claim 2, wherein the magnesium aluminum silicate inorganic gel is a modified magnesium aluminum silicate inorganic gel, and the preparation method of the capsule filler comprises the following preparation steps:
a1: adding organic bentonite into an organic solvent and water, and stirring and mixing to obtain magnesium aluminum silicate inorganic gel; adding methylamine formic acid-2-isopropyl phenyl ester into the magnesium aluminum silicate inorganic gel, stirring, mixing and aging to obtain modified magnesium aluminum silicate inorganic gel;
a2: adding the reflective nano-oxide and the pore-forming agent into the modified magnesium aluminum silicate inorganic gel, stirring, mixing, drying and roasting to obtain the capsule filler of the porous modified magnesium aluminum silicate inorganic gel coated with the reflective nano-oxide.
8. The heat-insulating coating according to claim 7, wherein the capsule filler is prepared by mixing an inorganic gel of magnesium aluminum silicate and 2-isopropyl phenyl methylamine formate in a weight ratio of 1 (0.08-0.11).
9. A method for preparing the heat-insulating coating according to any one of claims 1 to 8, comprising the steps of:
stirring and mixing the capsule filler and the polyol, adding a dispersing agent and a defoaming agent, and stirring and mixing to obtain a component B; and (3) stirring and mixing the isocyanate curing agent of the component B and the isocyanate curing agent of the component A to obtain the heat-insulating coating.
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| CN103642323A (en) * | 2013-10-16 | 2014-03-19 | 苏州瑞邦塑胶有限公司 | Interior wall thermal-insulation flame-retardant nano-coating |
| KR20180029147A (en) * | 2016-09-09 | 2018-03-20 | 주식회사 웨피 | Aqueous, heat reflective, heat insulation and thermal insulation paint with excellent UV blocking capacity and method for production thereof |
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| CN111825099A (en) * | 2020-09-09 | 2020-10-27 | 苏州国建慧投矿物新材料有限公司 | Aluminum magnesium silicate inorganic gel and preparation method thereof |
| CN114149734A (en) * | 2021-12-28 | 2022-03-08 | 南通科顺建筑新材料有限公司 | Reflective heat-insulation polyurethane waterproof coating and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103642323A (en) * | 2013-10-16 | 2014-03-19 | 苏州瑞邦塑胶有限公司 | Interior wall thermal-insulation flame-retardant nano-coating |
| KR20180029147A (en) * | 2016-09-09 | 2018-03-20 | 주식회사 웨피 | Aqueous, heat reflective, heat insulation and thermal insulation paint with excellent UV blocking capacity and method for production thereof |
| CN110484119A (en) * | 2019-08-20 | 2019-11-22 | 马鞍山市金韩防水保温工程有限责任公司 | A kind of heat insulating coatings used for building exterior wall and preparation method thereof |
| CN111825099A (en) * | 2020-09-09 | 2020-10-27 | 苏州国建慧投矿物新材料有限公司 | Aluminum magnesium silicate inorganic gel and preparation method thereof |
| CN114149734A (en) * | 2021-12-28 | 2022-03-08 | 南通科顺建筑新材料有限公司 | Reflective heat-insulation polyurethane waterproof coating and preparation method thereof |
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