CN114249565A - Double-component hollow glass bead heat-insulating coating and preparation method thereof - Google Patents
Double-component hollow glass bead heat-insulating coating and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/304—Air-entrainers
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00508—Cement paints
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The application relates to the technical field of coatings, and particularly discloses a bi-component hollow glass bead heat-insulating coating and a preparation method thereof. The coating comprises a component A and a component B which are packaged separately, wherein the component A comprises the following raw materials in parts by weight based on the total amount of the coating: 5-20 parts of hollow glass beads, 1-10 parts of silica aerogel, 0.1-0.6 part of dispersant, 0.1-0.5 part of cellulose ether and 50-70 parts of water; the component B comprises the following raw materials in parts by weight: 5 to 30 portions of cement, 0.1 to 1 portion of air entraining agent and 0.1 to 1 portion of organosilicon water repellent. The coating prepared according to the formula provided by the application has the heat preservation effect which can be achieved by organic materials while achieving the fireproof grade which can be achieved by inorganic materials, has good hydrophobic effect, good compressive strength and high bonding strength, is not easy to crack, is directly applied to wall spraying, is seamless, is easy to construct and high in efficiency for walls of any shapes, and can solve multiple problems and prevent fire and preserve heat simultaneously.
Description
Technical Field
The application relates to the technical field of coatings, in particular to a two-component hollow glass bead heat-insulating coating and a preparation method thereof.
Background
Energy conservation, consumption reduction and green development become the main melody of modern social and economic life, and the building energy consumption accounts for 30 percent of the total social energy consumption, so the building energy conservation becomes one of the main ways of energy conservation and emission reduction of countries in the world. And along with the improvement of people's living standard, people's requirement to living environment and office environment is higher and higher, not only need warm in winter and cool in summer, give sound insulation and fall the comfort of making an uproar, more want fire prevention waterproof security. Some safe and comfortable decorative materials come into play, for example: extruded sheets, polystyrene boards, rock wool boards, cement foam boards, inorganic light aggregate thermal insulation mortar and the like.
However, the inventor finds that the strength of the heat-insulating materials with low heat conductivity coefficient, such as extruded sheets, polystyrene boards and the like, is poor, the highest fire-proof grade can only reach B1 grade, the heat-insulating materials are only suitable for indoor heat insulation, the inner area of the heat-insulating materials can be occupied, and potential safety hazards also exist; the heat insulation materials such as rock wool boards and glass fiber boards, the fireproof grade of which can reach A grade, have the heat conductivity coefficient basically higher than 0.05W/(m.k), and have poor strength, poor waterproof performance and easy falling off; the heat conductivity coefficient of the fireproof heat-insulating material with better strength and the fireproof grade reaching A level, such as inorganic lightweight aggregate heat-insulating mortar, cement foam board, etc., is basically higher than 0.07W/(m.k), and the decay period of each performance of the material is short, thus easily causing safety accidents. Therefore, it is urgently needed to develop a material which has low thermal conductivity, high strength, easy construction and can reach the A-grade fire-proof grade.
Disclosure of Invention
In order to obtain a material which is low in heat conductivity coefficient, high in strength and capable of achieving A-level fire prevention, the application provides a two-component hollow glass bead heat-insulating coating and a preparation method thereof.
In a first aspect, the application provides a two-component hollow glass bead heat-insulating coating, which adopts the following technical scheme:
the two-component hollow glass bead heat-insulating coating comprises a component A and a component B which are packaged separately, wherein the component A comprises the following raw materials in parts by weight based on the total amount of the coating: 5-20 parts of hollow glass beads, 1-10 parts of silica aerogel, 0.1-0.6 part of dispersant, 0.1-0.5 part of cellulose ether and 50-70 parts of water;
based on the total amount of the coating, the component B comprises the following raw materials in parts by weight: 5-30 parts of cement, 0.1-1 part of air entraining agent and 0.1-1 part of organic silicon water repellent;
the weight ratio of the silica aerogel to the hollow glass beads to the air entraining agent is (1-10): (10-17): (0.1-0.5).
By adopting the technical scheme, the separately packaged component A and the component B are uniformly mixed, and the coating which has low heat conductivity coefficient, high strength and fire-proof grade reaching A level can be prepared. In this application, cement plays compressive strength and cohesive strength's effect on the one hand, gives the fine intensity of coating, and on the other hand cooperates with other inorganic materials, can strengthen the fire behavior of coating, makes the fire behavior of coating reach more than A level. Among the cements, white cement is preferable. The hollow glass beads and the silica aerogel are matched with each other, so that the heat conductivity coefficient of the coating can be reduced, the coating has a good heat preservation effect, and meanwhile, the heat conductivity coefficient of the coating can be further reduced and the heat preservation effect can be improved due to the existence of the air entraining agent. The dispersing agent can better disperse the hollow glass beads and the silica aerogel, so that the uniformity of the coating is enhanced, the quality of the coating is improved, and the construction performance of the coating is improved. The cellulose ether can enhance the water retention and the workability of the coating system, so that the coating is easy to spray and is beneficial to construction.
The organosilicon water repellent is added into the coating system, so that the volume water absorption of the coating can be reduced, the volume water absorption of the coating can be reduced from more than 10 percent to less than 3 percent, and the strength, the waterproof performance and the construction performance of the coating are improved. In addition, the organosilicon water repellent can achieve excellent effect under the condition of adding a small amount of the organosilicon water repellent, and the cost can be reduced. The organic silicon water repellent in the application is powder and can be directly mixed with cement and an air entraining agent.
The coating prepared according to the formula of the application has the heat preservation effect which can be achieved by organic materials while achieving the fireproof grade which can be achieved by inorganic materials, and has good strength and difficult cracking. The coating is suitable for decoration treatment of surfaces in any building shapes, especially inner and outer walls, floors, roofs and the like of new and old buildings.
In the application, the dispersant can be at least one of sodium salt dispersant and ammonium salt dispersant; the cellulose ether may be hydroxypropyl methylcellulose.
Preferably, the weight ratio of the component A to the component B is (2.3-9): 1. Further preferably, the weight ratio of the component A to the component B is (6.7-9): 1, most preferably 9: 1.
the component A and the component B are mixed according to the formula ratio, so that the strength and the fireproof performance of the coating can be improved, and the heat conductivity coefficient can be reduced. When the weight ratio of the component A to the component B is 9: 1, the coating has good various performances, the fire-retardant grade can reach A2 grade, the heat conductivity coefficient is less than or equal to 0.035W/(m.K), and the strength is more than or equal to 0.4 Mpa.
Preferably, the weight ratio of the silica aerogel to the hollow glass beads to the air entraining agent is (2-5): (15-17): (0.1-0.3).
Further preferably, the hollow glass beads have a true density of 0.10 to 0.30g/m3The grain diameter is 60-70 μm, and the compressive strength is 2-10 Mpa; the air entraining agent is selected from any one of sodium dodecyl sulfate, rosin resin and sodium fatty alcohol sulfonate.
Most preferably, the weight ratio of the silica aerogel, the hollow glass microspheres and the sodium dodecyl sulfate is 2:15: 0.1.
The inventors have found that the thermal insulation properties of the coating are best when the weight ratio of the silica aerogel, the hollow glass microspheres and the sodium dodecyl sulfate is 2:15:0.1, and at this time, the thermal conductivity of the coating is the lowest and is 0.035W/(m.K).
Preferably, the weight of the organosilicon water repellent accounts for 0.1-0.3 part of the total amount of the coating.
Preferably, the component A also comprises a waterproof emulsion, and the dosage of the waterproof emulsion accounts for 2-10 parts of the total amount of the coating. More preferably, the waterproof emulsion can be styrene-acrylic emulsion, such as basf 608.
The waterproof emulsion is added into the coating, so that the waterproof performance of the coating can be enhanced, the coating has good strength, heat insulation and fire resistance, and simultaneously has good waterproof performance, multiple problems can be solved, repeated construction is reduced, bearing is lightened, cost can be saved, and the decoration and the attractiveness can be enhanced to a certain extent. In addition, the addition of basf 608 can further reduce the volume water absorption of the coating.
Preferably, the density of the coating is less than 500 g/L.
When the component A and the component B are mixed, the density of the coating is less than 500g/L, which shows that the coating has good heat conductivity coefficient and the heat preservation performance meets the required requirements. In the actual construction process, after the component A and the component B are mixed, firstly detecting whether the density of the coating is less than 500g/L, if the density of the coating is less than 450 g/L, indicating that the heat-insulating property of the coating is better, and then detecting the fire-proof grade of the coating; if the density of the coating is more than 500g/L, the thermal insulation performance of the coating is unqualified, and at the moment, the fire-proof grade of the coating does not need to be detected. The judgment of the performance of the coating can be accelerated by detecting the density of the coating, and time and labor are saved.
In a second aspect, the application provides a preparation method of a two-component hollow glass bead heat-insulating coating, which adopts the following technical scheme:
the preparation method of the double-component hollow glass bead heat-insulating coating comprises the following steps:
preparation of component A: dissolving cellulose ether in water according to a formula ratio, sequentially adding a dispersing agent, silica aerogel and hollow glass beads, and uniformly stirring to obtain a component A;
preparation of the component B: and uniformly stirring the cement, the air entraining agent and the organic silicon water repellent according to the formula proportion to obtain the component B.
Preferably, when a water-repellent emulsion is present in the system, the preparation of the a-component is as follows: dissolving cellulose ether in water according to the formula proportion, sequentially adding a dispersing agent, silica aerogel, waterproof emulsion and hollow glass beads, and uniformly stirring to obtain the component A.
The component A in the application is paste and has small light weight and density, and is not easy to package by adopting a conventional method, so that the component A is packaged under the pressure of 0.1-0.2MPa when being packaged separately.
The coating prepared according to the formula and the preparation method breaks through the technical barriers that the fireproof performance, the heat preservation performance and the strength of the existing heat preservation material cannot be considered at the same time, and has good heat preservation performance, fireproof performance and good strength. Compared with heat insulation materials with lower heat conductivity coefficients such as extruded sheets, polystyrene foam boards and the like, the fireproof performance of the coating can reach A2 level, and when the coating is applied to building heat insulation, the coating not only has good heat insulation performance, but also has the advantage of fire prevention, and can meet the requirement of fire protection; compared with materials with A-grade fireproof performance, such as rock wool boards, foam glass boards, cement foam boards, inorganic light aggregate thermal insulation mortar and the like, the thermal conductivity coefficient of the material is lower than 0.035W/(m.K), and when the material is applied to building thermal insulation, the material has good fireproof performance and good thermal insulation performance. In addition, the coating meets the energy-saving requirement, and is lower in heat conductivity coefficient and thinner in thickness, so that the wall is lighter in load and safer.
In a third aspect, the application provides a use method of a two-component hollow glass bead heat insulation coating, which adopts the following technical scheme:
a method for using a two-component hollow glass bead heat-insulating coating comprises the following steps:
when in use, the component A and the component B which are packaged separately are stirred evenly to obtain a finished product of the coating. The mixed coating has good viscosity and cracking resistance, so that the coating is generally constructed by adopting a spraying construction process, the film forming property is good, the one-time construction thickness can reach 20mm, the coating is more convenient and rapid, and the efficiency is higher.
In summary, the present application has the following beneficial effects:
the coating prepared according to the formula and the preparation method of the coating has the heat preservation effect which can be achieved by organic materials while achieving the fireproof grade which can be achieved by inorganic materials, has a good hydrophobic effect, is good in compressive strength and high in bonding strength, does not crack, can be directly sprayed and constructed on the wall surface, is seamless as a whole, can be easily constructed on the wall surface in any shape, is high in efficiency, and can simultaneously solve multiple problems, prevent fire and preserve heat.
According to the formula and the preparation method, the double-component hollow glass bead heat-insulating coating with the heat conductivity coefficient of 0.035W/(m.K), the fire-proof grade of A2, the compressive strength of 0.4Mpa and the volume water absorption of less than 3% can be prepared.
Detailed Description
The present application will be described in further detail with reference to examples. Specifically, the following are described: the following examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer; the starting materials used in the following examples are all those conventionally commercially available except where specifically noted.
Examples
Example 1
A preparation method of a two-component hollow glass bead heat-insulating coating comprises the following steps:
preparation of component A: dissolving 0.1kg of hydroxypropyl methyl cellulose in 70kg of water, sequentially adding 0.6kg of sodium salt dispersing agent, 10kg of silica aerogel and 10kg of hollow glass beads, and uniformly stirring to obtain a component A;
preparation of the component B: uniformly stirring 25kg of cement, 0.1kg of sodium dodecyl sulfate and 0.3kg of organic silicon water repellent (type SEAL80) to obtain a component B;
and uniformly stirring the component A and the component B to obtain the coating.
Example 2
A preparation method of a two-component hollow glass bead heat-insulating coating comprises the following steps:
preparation of component A: dissolving 0.15kg of hydroxypropyl methyl cellulose in 70kg of water, sequentially adding 0.4kg of sodium salt dispersing agent, 2kg of silica aerogel and 15kg of hollow glass beads, and uniformly stirring to obtain a component A;
preparation of the component B: uniformly stirring 10kg of cement, 0.3kg of sodium dodecyl sulfate and 0.3kg of organic silicon water repellent (type SEAL80) to obtain a component B;
and uniformly stirring the component A and the component B to obtain the coating.
Example 3
Example 3 differs from example 2 only in that the hollow glass beads in example 3 were 15P500 in type (type 15P500 hollow glass beads: white, true density 0.15 g/cm)3Particle size 65 μm, compressive strength 5 MPa), the remainder being identical to example 2.
Example 4
Example 4 differs from example 3 only in that the rosin resin air entraining agent was used in place of sodium lauryl sulfate in example 4, and the rest remained the same as in example 3.
Example 5
Example 5 differs from example 3 only in that in example 5, the silicone moisture repellent model SEAL80 was replaced with silicone moisture repellent models kpl-45363, all remaining in accordance with example 3.
Example 6
Example 6 differs from example 3 only in that example 6 also includes 7kg of a water-resistant emulsion (e.g., basf 608) in component a, the remainder being in accordance with example 3, as follows:
a preparation method of a two-component hollow glass bead heat-insulating coating comprises the following steps:
preparation of component A: dissolving 0.15kg of hydroxypropyl methyl cellulose in 70kg of water, and then sequentially adding 0.4kg of sodium salt dispersing agent, 2kg of silica aerogel, 7kg of waterproof emulsion (such as BASF 608) and 15kg of hollow glass beads (model 15P 500) and uniformly stirring to obtain a component A;
preparation of the component B: uniformly stirring 10kg of cement, 0.3kg of sodium dodecyl sulfate and 0.3kg of organic silicon water repellent (type SEAL80) to obtain a component B;
and uniformly stirring the component A and the component B to obtain the coating.
Example 7
Example 7 differs from example 6 only in that in example 7 the water-resistant emulsion (e.g., basf 608) was replaced with a water-resistant emulsion of type SD-718, all of which remained the same as in example 6.
Comparative example
Comparative example 1
Comparative example 1 differs from example 2 only in that: in comparative example 1, no component B was added, and the remainder was identical to example 2.
Comparative example 2
Comparative example 2 differs from example 2 only in that: in comparative example 2, no hollow glass beads were added, and the remainder was identical to example 2.
Comparative example 3
Comparative example 3 differs from example 2 only in that: in comparative example 3, no silica aerogel was added, and the remainder was identical to example 2.
Comparative example 4
Comparative example 4 differs from example 2 only in that: in comparative example 4, no air entraining agent was added and the remainder was in accordance with example 2.
Comparative example 5
A preparation method of a two-component hollow glass bead heat-insulating coating comprises the following steps:
preparation of component A: dissolving 0.1kg of hydroxypropyl methyl cellulose in 50kg of water, sequentially adding 0.1kg of sodium salt dispersing agent, 1kg of silica aerogel and 5kg of hollow glass beads, and uniformly stirring to obtain a component A;
preparation of the component B: uniformly stirring 30kg of cement and 1kg of sodium dodecyl sulfate to obtain a component B;
and uniformly stirring the component A and the component B to obtain the coating.
Comparative example 6
A preparation method of a two-component hollow glass bead heat-insulating coating comprises the following steps:
preparation of component A: dissolving 0.5kg of hydroxypropyl methyl cellulose in 68kg of water, sequentially adding 0.6kg of sodium salt dispersing agent, 10kg of silica aerogel and 20kg of hollow glass beads, and uniformly stirring to obtain a component B;
preparation of the component B: stirring 5kg of cement and 0.1kg of sodium dodecyl sulfate uniformly to obtain a component A;
and uniformly stirring the component A and the component B to obtain the coating.
Comparative example 7
Comparative example 7 differs from example 2 only in that in comparative example 7 the silica aerogel is replaced with a titania aerogel and the rest remains the same as in example 2.
Performance test
The basic properties of the coating samples prepared in examples 1 to 11 and comparative examples 1 to 4, such as thermal conductivity, fire-retardant rating, volume water absorption and compressive strength, were measured, and the specific measurement results are shown in table 1 below.
Detecting the fire-retardant grade of each paint sample according to the GB/T5464 standard;
detecting the heat conductivity coefficient of each paint sample according to GB/T10294;
the volume water absorption of each coating sample was measured according to GB/T5486.3.
TABLE 1
| Paint sample | Thermal conductivity/W/(m.K) | Fire rating/grade | Compressive strength/Mpa | Volume water absorption/% |
| Example 1 | 0.045 | A2 | 0.45 | 2.4 |
| Example 2 | 0.042 | A2 | 0.4 | 2.2 |
| Example 3 | 0.035 | A2 | 0.4 | 2.1 |
| Example 4 | 0.045 | A2 | 0.4 | 2.1 |
| Example 5 | 0.043 | A2 | 0.4 | 2.6 |
| Example 6 | 0.035 | A2 | 0.4 | 1.7 |
| Example 7 | 0.036 | A2 | 0.4 | 2.0 |
| Comparative example 1 | 0.05 | B2 | 0.05 | 1.2 |
| Comparative example 2 | 0.15 | A2 | 1.8 | 0.5 |
| Comparative example 3 | 0.05 | A2 | 0.48 | 2.1 |
| Comparative example 4 | 0.054 | A2 | 0.42 | 2.3 |
| Comparative example 5 | 0.042 | A2 | 0.4 | 14.8 |
| Comparative example 6 | 0.42 | A2 | 0.4 | 11.5 |
| Comparative example 7 | 0.051 | A2 | 0.49 | 2.4 |
As can be seen by combining the examples 1-2 and the comparative example 1 and combining the table 1, the double-component hollow glass bead heat-insulating coating with small heat conductivity coefficient, high fire-proof grade and good compressive strength can be prepared according to the formula of the application, and each component is not necessary; when the weight ratio of the component A to the component B in the coating system is (2.3-9): 1, and the weight ratio of the silica aerogel, the hollow glass microspheres and the air entraining agent is (1-5): (10-17): (0.1-0.5), the overall properties (heat insulating property, fire resistance and compressive strength) of the coating are the best.
It can be seen from the combination of examples 1 to 2 and comparative examples 2 to 4 and 7 and from table 1 that when specific substances are used for the silica aerogel, the hollow glass beads and the air-entraining agent, the thermal conductivity of the coating can be further reduced, i.e., the heat insulating property of the coating can be enhanced.
By combining examples 1-7 and comparative examples 5-6 and combining table 1, it can be seen that the volume water absorption of the coating can be greatly reduced by adding the organosilicon water repellent into the coating system, and when the specific organosilicon water repellent is added, the volume water absorption of the coating is reduced, and other properties of the coating are not affected.
As can be seen by combining examples 6-7 with Table 1, the addition of a water repellent emulsion to the coating system further reduces the water absorption by volume of the coating without affecting other properties.
The coating phenomenon of each coating was observed, and it was found that when component B was not added to the coating system (comparative example 4), the resulting coating was relatively dispersed, had poor film-forming properties, and was easily dusted after spraying.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. A double-component hollow glass bead heat insulation coating is characterized in that: comprises an A component and a B component which are packaged separately;
based on the total amount of the coating, the component A comprises the following raw materials in parts by weight: 5-20 parts of hollow glass beads, 1-10 parts of silica aerogel, 0.1-0.6 part of dispersant, 0.1-0.5 part of cellulose ether and 50-70 parts of water;
based on the total amount of the coating, the component B comprises the following raw materials in parts by weight: 5-30 parts of cement, 0.1-1 part of air entraining agent and 0.1-1 part of organic silicon water repellent;
the weight ratio of the silica aerogel to the hollow glass beads to the air entraining agent is (1-10): (10-17): (0.1-0.5).
2. The two-component hollow glass bead thermal insulation coating according to claim 1, characterized in that: the weight ratio of the component A to the component B is (2.3-9): 1.
3. The two-component hollow glass bead thermal insulation coating according to claim 2, characterized in that: the weight ratio of the silica aerogel to the hollow glass beads to the air entraining agent is (2-5): (15-17): (0.1-0.3).
4. The two-component hollow glass bead thermal insulation coating according to claim 3, characterized in that: the vacuum density of the hollow glass bead is 0.10-0.30g/m3The grain diameter is 60-70 μm, and the compressive strength is 2-10 Mpa.
5. The two-component hollow glass bead thermal insulation coating according to claim 4, characterized in that: the air entraining agent is selected from any one of sodium dodecyl sulfonate, rosin resin and sodium fatty alcohol sulfonate.
6. The two-component hollow glass bead thermal insulating coating according to any one of claims 1-5, characterized in that: the component A also comprises waterproof emulsion, and the dosage of the waterproof emulsion accounts for 2-10 parts of the total amount of the coating.
7. The two-component hollow glass bead thermal insulation coating according to claim 6, characterized in that: the density of the coating is less than 500 g/L.
8. The method for preparing two-component hollow glass bead heat insulating coating according to any one of claims 1 to 7, wherein: the method comprises the following steps:
preparation of component A: dissolving cellulose ether in water according to a formula ratio, sequentially adding a dispersing agent, silica aerogel and hollow glass beads, and uniformly stirring to obtain a component A;
preparation of the component B: and uniformly stirring the cement, the air entraining agent and the organic silicon water repellent according to the formula proportion to obtain the component B.
9. The method for preparing the two-component hollow glass bead heat-insulating coating according to claim 8, characterized in that: when a water-resistant emulsion is present in the system, the preparation of the a component is as follows:
dissolving cellulose ether in water according to the formula proportion, sequentially adding a dispersing agent, silica aerogel, waterproof emulsion and hollow glass beads, and uniformly stirring to obtain the component A.
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| CN115466080A (en) * | 2022-10-31 | 2022-12-13 | 汇克涂料(湖南)有限公司 | External wall heat-insulation system with double-component hollow glass bead heat-insulation coating, preparation method and application thereof |
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