CN115895455B - Nano silicon dioxide aerogel external wall heat insulation sealant and preparation method thereof - Google Patents
Nano silicon dioxide aerogel external wall heat insulation sealant and preparation method thereof Download PDFInfo
- Publication number
- CN115895455B CN115895455B CN202211577525.2A CN202211577525A CN115895455B CN 115895455 B CN115895455 B CN 115895455B CN 202211577525 A CN202211577525 A CN 202211577525A CN 115895455 B CN115895455 B CN 115895455B
- Authority
- CN
- China
- Prior art keywords
- silicon dioxide
- parts
- sealant
- nano silicon
- dioxide aerogel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 239000000565 sealant Substances 0.000 title claims abstract description 58
- 239000004964 aerogel Substances 0.000 title claims abstract description 43
- 235000012239 silicon dioxide Nutrition 0.000 title claims abstract description 35
- 239000005543 nano-size silicon particle Substances 0.000 title claims abstract description 34
- 238000009413 insulation Methods 0.000 title abstract description 35
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000002270 dispersing agent Substances 0.000 claims abstract description 23
- PNGBYKXZVCIZRN-UHFFFAOYSA-M sodium;hexadecane-1-sulfonate Chemical compound [Na+].CCCCCCCCCCCCCCCCS([O-])(=O)=O PNGBYKXZVCIZRN-UHFFFAOYSA-M 0.000 claims abstract description 21
- 239000004005 microsphere Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000013530 defoamer Substances 0.000 claims abstract description 9
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 6
- 239000003899 bactericide agent Substances 0.000 claims abstract description 6
- 239000004965 Silica aerogel Substances 0.000 claims description 21
- 239000002002 slurry Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- NHKHUHXMKHSOJT-UHFFFAOYSA-N 2-methyl-1,2-thiazolidin-4-one Chemical group CN1CC(=O)CS1 NHKHUHXMKHSOJT-UHFFFAOYSA-N 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000002518 antifoaming agent Substances 0.000 claims description 3
- DMSMPAJRVJJAGA-UHFFFAOYSA-N benzo[d]isothiazol-3-one Chemical compound C1=CC=C2C(=O)NSC2=C1 DMSMPAJRVJJAGA-UHFFFAOYSA-N 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims description 2
- 239000013464 silicone adhesive Substances 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 17
- 239000000047 product Substances 0.000 description 12
- 229910014314 BYK190 Inorganic materials 0.000 description 9
- 239000004094 surface-active agent Substances 0.000 description 9
- 239000006185 dispersion Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 239000000203 mixture Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 239000000693 micelle Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000049 pigment Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 238000005660 chlorination reaction Methods 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 239000012774 insulation material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011325 microbead Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000008364 bulk solution Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 125000001165 hydrophobic group Chemical group 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- DAJSVUQLFFJUSX-UHFFFAOYSA-M sodium;dodecane-1-sulfonate Chemical group [Na+].CCCCCCCCCCCCS([O-])(=O)=O DAJSVUQLFFJUSX-UHFFFAOYSA-M 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- UJGIYHXRNBCGRE-UHFFFAOYSA-N C(CCCCCCCCCCCCCCC)[Na] Chemical compound C(CCCCCCCCCCCCCCC)[Na] UJGIYHXRNBCGRE-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical group CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910021627 Tin(IV) chloride Inorganic materials 0.000 description 1
- YOUIDGQAIILFBW-UHFFFAOYSA-J Tungsten(IV) chloride Inorganic materials Cl[W](Cl)(Cl)Cl YOUIDGQAIILFBW-UHFFFAOYSA-J 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 239000008396 flotation agent Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- BGRYSGVIVVUJHH-UHFFFAOYSA-N prop-2-ynyl propanoate Chemical compound CCC(=O)OCC#C BGRYSGVIVVUJHH-UHFFFAOYSA-N 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- HEBRGEBJCIKEKX-UHFFFAOYSA-M sodium;2-hexadecylbenzenesulfonate Chemical compound [Na+].CCCCCCCCCCCCCCCCC1=CC=CC=C1S([O-])(=O)=O HEBRGEBJCIKEKX-UHFFFAOYSA-M 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- -1 sulfonic acid radical ion Chemical class 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Silicon Compounds (AREA)
Abstract
The invention provides a nano silicon dioxide aerogel external wall heat-insulating sealant and a preparation method thereof, wherein the nano silicon dioxide aerogel external wall heat-insulating sealant comprises the following components in parts by weight: 4-22 parts of nano silicon dioxide aerogel, 2-8 parts of sodium hexadecyl sulfonate, 0.5-2 parts of dispersing agent, 0.2-0.5 part of defoamer, 0.2-0.3 part of bactericide, 1-5 parts of hollow microsphere and 65.2-92.1 parts of water; the thermal conductivity coefficient of the nano silicon dioxide aerogel external wall thermal insulation sealant provided by the invention can reach about 0.04W/K.m (25 ℃), and compared with the thermal conductivity coefficient of common silicone adhesive which is 0.2-0.3W/K.m (25 ℃), the thermal conductivity coefficient of the nano silicon dioxide aerogel external wall thermal insulation sealant is far lower than that of the conventional sealant, and the low thermal conductivity coefficient can effectively block heat loss.
Description
Technical Field
The invention relates to the field of high polymer materials, in particular to a nano silicon dioxide aerogel external wall heat insulation sealant and a preparation method thereof.
Background
At present, an insulation integrated plate is often used in the external wall insulation material, and a sealing glue is commonly used for sealing a gap between the insulation integrated plates. Because all the joints of the heat-insulating boards in the current market are connected by using silicone adhesive as a filler, and the heat conductivity coefficient of the silicone adhesive in the market is too high, a thermal bridge is formed between the joints, so that a large amount of energy is lost. In the production process of the sealant product, the heat insulation material of nano silicon dioxide aerogel and hollow ceramic microbeads is added, so that the product can play a role in sealing and simultaneously can also play a role in blocking heat transfer, and the sealant product can be used as a matching material of an external wall heat insulation system.
CN111909564a discloses an infrared barrier composition and a method for preparing the same, which is prepared from an inorganic chlorinated mixture, a solvent and a dispersant, wherein: the inorganic chlorination mixture comprises the following components in percentage by mass: tungsten tetrachloride: 20-60% of titanium tetrachloride: 30-50%, tin tetrachloride: 10-30%; the mass ratio of the solvent to the inorganic chlorination mixture is 1:2; the addition amount of the dispersing agent is 1-3wt% of the inorganic chlorination mixture; the solvent is absolute ethyl alcohol, propanol, isopropanol or n-butanol, and the dispersing agent is sodium dodecyl sulfonate, sodium dodecyl benzene sulfonate, sodium hexadecyl sulfonate or sodium hexadecyl benzene sulfonate. The composition can be widely applied to the fields of heat insulation films, coatings, printing ink, glass adhesive films and the like. In the invention, the dispersing agent mainly solves the problem of dispersing some chlorides. The process provides a predominantly solvent-based product.
The heat insulation effect of the existing sealant needs to be further improved. Therefore, how to develop a novel sealant has great significance for application.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the nano silicon dioxide aerogel external wall heat insulation sealant and the preparation method thereof, so as to improve the heat insulation effect of the sealant and keep other performances such as bonding strength.
To achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a nano silica aerogel external wall heat insulation sealant, which comprises the following components in parts by weight:
the heat conductivity coefficient of the existing external wall heat insulation board is extremely low, but the heat conductivity coefficient of common sealant used at joints is higher, so that certain heat loss can be caused. And the heat conductivity coefficient of the sealant is reduced, so that a cold bridge and a hot bridge generated in the using process are reduced, and the heat insulation effect can be further achieved. The nano silicon dioxide aerogel external wall heat insulation sealant provided by the invention adopts a special process production technology, so that the problem of strong hydrophobicity of the surface of the silicon dioxide aerogel is solved, the problem of dispersibility of nano materials in a system is solved, the product after solidification has extremely low heat conductivity coefficient, the heat insulation and energy conservation effects are achieved, and meanwhile, the influence on other properties such as bonding strength is small.
At present, silica aerogel and hollow ceramic microbeads are generally used as wall thermal insulation materials or flame retardant materials, and because the nano silica aerogel has strong hydrophobicity, a special dispersion system is needed to be used in an aqueous system for effective dispersion. However, in the invention, the special dispersion system sodium cetyl sulfonate is used as the main material, the problem of the surface tension of the aerogel is solved by utilizing the better emulsifying property of the special dispersion system sodium cetyl sulfonate, the special dispersion system sodium cetyl sulfonate is easy to disperse in aqueous solution, the aerogel is prevented from agglomerating again, the nano silica aerogel which is difficult to disperse in the aqueous system is prepared into slurry by matching with the high molecular weight block copolymer dispersing agent containing pigment affinity groups, and then hollow ceramic microbeads are added.
In the invention, the high hydrophobicity of the silica aerogel is treated mainly by utilizing the characteristics of the silica aerogel so as to facilitate the dispersion of aerogel powder. The final product is the sealant of the outer wall, which belongs to the building adhesive product.
In the present invention, the nano silica aerogel is 4 to 22 parts, and for example, 4 parts, 5 parts, 6 parts, 10 parts, 14 parts, 18 parts, 20 parts, 22 parts, or the like can be used. The nano silica aerogel used in the invention is aerogel conventionally used in the field and can be directly purchased from the market.
In the present invention, 2 to 8 parts of sodium hexadecyl sulfonate may be, for example, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, or the like.
Sodium cetyl sulfonate is commonly used in industrial and domestic liquid detergents, textile industry cleaners, dyeing aids, flotation agents for mineral separation, and is rarely used as a dispersant for architectural coatings. The invention is applied to the building paint by utilizing the property of the paint. The phenomenon in which the substance itself is internally concentrated at the interface is called adsorption. When a small amount of surfactant is dissolved in water, the surfactant will be concentrated on the surface of the aqueous solution, with the hydrophilic end facing into the water and the hydrophobic end facing into the air, causing the surface of the water to drop significantly. This phenomenon in which the concentration of the surfactant in the surface layer is higher than that in the bulk solution is called "positive adsorption", and "negative adsorption" if the concentration of the solute in the surface layer is lower than that in the bulk solution. With the increase of the concentration of the surfactant, the surface tension of the solution is continuously reduced, and when the surfactant molecules just spread on the surface of the solution, namely the adsorption of the monomolecular layer is realized, the surface tension reaches the minimum value, and the concentration of the surfactant is the Critical Micelle Concentration (CMC). Above CMC, the surface tension of the solution no longer drops and the increased surfactant molecules mainly form micelles inside the solution. In the concentration range, the powder can be matched with corresponding powder, so that a better dispersing effect is achieved.
The dispersant of the present invention may be 0.5 to 2 parts by weight, for example, 0.5 parts, 0.8 parts, 1 part, 1.5 parts, 2 parts, or the like.
Preferably, the dispersant is a BYK190 dispersant. In the present invention, 190 auxiliaries from BYK, germany, are used. The auxiliary agent is a dispersant which can deflocculate and stabilize the pigment through steric hindrance, and also can make the pigment particles carry charges with the same property. The resulting repulsive effect and steric stabilization prevent co-flocculation of the pigment and reduce the viscosity of the millbase. In the invention, the concentration range of the dispersing agent is moderate and is matched with the corresponding powder. Other types of dispersants commonly used in the market have also been tried in this experiment, all with lower efficacy than the BYK190 dispersant.
The defoaming agent of the present invention may be 0.2 to 0.5 parts by weight, for example, 0.2 parts, 0.3 parts, 0.4 parts or 0.5 parts.
Preferably, the defoamer is an organosilicon defoamer. For example, it may be a SNDEFOAMER 1370 silicone defoamer.
The bactericide of the present invention may be 0.2 to 0.3 parts by weight, for example, 0.2 parts or 0.3 parts.
Preferably, the bactericide is 2-methylisothiazolinone and/or benzisothiazolinone.
Preferably, the mass ratio of the nano silicon dioxide aerogel to the hexadecyl sodium sulfonate is 1:0.5-2.
For example, it may be 1:0.5, 1:1, 1:1.5, or 1:2, etc. In the invention, the proportion of the sodium cetyl sulfonate to the nano silicon dioxide aerogel is moderate, and if the proportion deviation of a certain component is too large, the dispersion effect of the aerogel system can be seriously affected, so that the preparation of the product is difficult.
The molecular structure of the surfactant has hydrophilic groups and hydrophobic groups, and has the critical micelle concentration, and when the surfactant contacts water, micelle with the hydrophobic end facing outwards is formed. Sodium dodecyl sulfonate belongs to anionic surfactant, its hydrophilic end is sodium sulfonate, when it is dissolved in water, it can ionize to form negative sulfonic acid radical ion with negative charge, and it possesses good permeation and moistening action. The proportion of the sodium dodecyl sulfate to the nano silicon dioxide aerogel is moderate, and the sodium dodecyl sulfate concentration is ensured to be within the critical micelle concentration range.
The hollow microsphere of the present invention may be 1 to 5 parts by weight, for example, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, or the like.
Preferably, the mass ratio of the nano silica aerogel to the hollow microsphere is 4:1.
In the present invention, the hollow microsphere is typically 38HS hollow microsphere of 3M company.
In a second aspect, the invention provides a preparation method of the nano silica aerogel external wall heat insulation sealant according to the first aspect, wherein the preparation method comprises the following steps: mixing water and sodium hexadecyl sulfonate, adding nano silicon dioxide aerogel and a dispersing agent, dispersing, adding hollow microspheres, a defoaming agent and a bactericide to obtain slurry, and further adding the slurry into a sealant resin to obtain the nano silicon dioxide aerogel external wall heat insulation sealant.
In the invention, the slurry is added into the sealant resin according to the effective mass fraction of 2-15%, so that the density of the sealant can be reduced, and compared with the common commercial sealant without aerogel powder or hollow glass bead components, the thermal conductivity is reduced by about 80%.
The beneficial effects are that: the thermal conductivity coefficient of the nano silicon dioxide aerogel external wall thermal insulation sealant provided by the invention can reach about 0.04W/K.m (25 ℃), and compared with the thermal conductivity coefficient of common silicone adhesive which is 0.2-0.3W/K.m (25 ℃), the thermal conductivity coefficient of the nano silicon dioxide aerogel external wall thermal insulation sealant is far lower than that of the conventional sealant, and the low thermal conductivity coefficient can effectively block heat loss.
The nano silicon dioxide aerogel external wall heat insulation sealant provided by the invention has no great influence on the bonding strength of the sealant, and the physical properties of the sealant meet the standard requirement GB 16776 of sealant for Silicone Structure sealant for construction.
Detailed Description
In order to better illustrate the present invention, the technical solution is easy to understand, and the present invention is further described in detail below.
Example 1
The embodiment provides a nano silicon dioxide aerogel external wall heat insulation sealant, which comprises the following components in parts by weight:
mixing water and sodium hexadecyl sulfonate, adding nano silicon dioxide aerogel and BYK190 dispersing agent, dispersing, adding 38HS hollow microsphere, SNDEFOAMER 1370 organic silicon defoamer and 2-methyl isothiazolinone to obtain slurry, and further adding the slurry into sealant resin to obtain the nano silicon dioxide aerogel external wall heat insulation sealant.
Example 2
The embodiment provides a nano silicon dioxide aerogel external wall heat insulation sealant, which comprises the following components in parts by weight:
mixing water and sodium hexadecyl sulfonate, adding nano silicon dioxide aerogel and BYK190 dispersing agent, dispersing, adding 38HS hollow microsphere, SNDEFOAMER 1370 organic silicon defoamer and 2-methyl isothiazolinone to obtain slurry, and further adding the slurry into sealant resin to obtain the nano silicon dioxide aerogel external wall heat insulation sealant.
Example 3
The embodiment provides a nano silicon dioxide aerogel external wall heat insulation sealant, which comprises the following components in parts by weight:
mixing water and sodium hexadecyl sulfonate, adding nano silicon dioxide aerogel and BYK190 dispersing agent, dispersing, adding 38HS hollow microsphere, SNDEFOAMER 1370 organic silicon defoamer and 2-methyl isothiazolinone to obtain slurry, and further adding the slurry into sealant resin to obtain the nano silicon dioxide aerogel external wall heat insulation sealant.
Example 4
The present example differs from example 1 only in that the weight part of sodium hexadecyl sulfonate in this example is 2 parts, and the rest is the same as example 1. The embodiment is difficult to disperse and difficult to prepare into slurry for sealant production.
Example 5
The present example differs from example 1 only in that the weight part of the nano silica aerogel in the present example is 22 parts, the weight part of sodium hexadecyl sulfonate is 2 parts, and the rest is prepared in the same way as example 1. The embodiment is difficult to disperse and difficult to prepare into slurry for sealant production.
Example 6
The difference between the embodiment and the embodiment 1 is that the weight part of the 38HS hollow microsphere in the embodiment is 1 part, and the rest is the same as the embodiment 1 to prepare the nano silicon dioxide aerogel external wall heat insulation sealant.
Comparative example 1
The comparative example is different from example 1 only in that sodium hexadecyl sulfonate is not included in the comparative example, and the rest is the same as example 1 to prepare the nano silica aerogel external wall heat insulation sealant.
Comparative example 2
The comparative example is different from example 1 only in that 1 part by weight of sodium hexadecyl sulfonate in the comparative example and the rest are the same as example 1 to prepare the nano silica aerogel external wall insulation sealant.
Comparative example 3
The comparative example is different from example 1 only in that the weight part of BYK190 dispersant in the comparative example is 0.1 part, and the rest is the same as example 1 to prepare the nano silica aerogel external wall insulation sealant.
Comparative example 4
The comparative example is different from example 1 only in that the comparative example does not contain BYK190, and the rest is the same as example 1 to prepare the nano silica aerogel external wall heat insulation sealant.
The nano silica aerogel external wall insulation sealants provided in examples 1 to 6 and comparative examples 1 to 4 were subjected to performance tests for thermal conductivity (GB/T10295-2008), dispersibility (dispersibility was judged by means of storage stability), tensile bond strength (23 ℃, GB 16776), and the obtained results are shown in table 1 below:
TABLE 1
As can be seen from the data of the above examples and comparative examples, the nano silica aerogel external wall insulation sealant provided in example 1 has the best performance, and the tested thermal conductivity coefficient is between 0.036 and 0.039W/K.m (25 ℃), and has good dispersibility and tensile bonding strength. The products provided in examples 4-5, with too little added sodium cetyl sulfonate and too low a ratio relative to the aerogel powder, resulted in a harder dispersion, although subsequent products could be made, which were difficult to make and could not be tested normally.
Comparative examples 1 and 2, in which sodium hexadecyl sulfonate was not added and the content thereof was too low, were difficult to prepare subsequent products to complete the test.
In comparative example 3, the addition amount of the dispersant was small, which affected the overall performance of the product, and the overall performance of the product was lowered.
In comparative example 4, the lack of the dispersant BYK190 was poor in overall dispersibility and poor in effect. From this, it can be seen that the sodium hexadecyl sulfonate and BYK190 dispersant are combined in the invention, and the hydrophobic groups can be complemented, so that the hydrophobic aerogel can be better dispersed.
Claims (5)
1. The nano silicon dioxide aerogel outer wall sealant is characterized by comprising the following components in parts by weight:
the mass ratio of the nano silicon dioxide aerogel to the sodium hexadecyl sulfonate is 1:0.5-2; the mass ratio of the nano silicon dioxide aerogel to the hollow microsphere is 4:1.
2. The nano-silica aerogel outer wall sealant of claim 1, wherein the defoamer is an organosilicon defoamer.
3. The nano silica aerogel outer wall sealant according to claim 1, wherein the bactericide is 2-methylisothiazolinone and/or benzisothiazolinone.
4. The method for preparing the nano silica aerogel outer wall sealant according to any one of claims 1 to 3, wherein the method comprises the following steps: mixing water and sodium hexadecyl sulfonate, adding nano silicon dioxide aerogel and a dispersing agent, dispersing, adding hollow microspheres, a defoaming agent and a bactericide to obtain slurry, and further adding the slurry into sealant resin to obtain the nano silicon dioxide aerogel outer wall sealant.
5. Use of the nano silica aerogel outer wall sealant according to any of claims 1-3 in glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211577525.2A CN115895455B (en) | 2022-12-09 | 2022-12-09 | Nano silicon dioxide aerogel external wall heat insulation sealant and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211577525.2A CN115895455B (en) | 2022-12-09 | 2022-12-09 | Nano silicon dioxide aerogel external wall heat insulation sealant and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115895455A CN115895455A (en) | 2023-04-04 |
| CN115895455B true CN115895455B (en) | 2023-10-17 |
Family
ID=86493680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211577525.2A Active CN115895455B (en) | 2022-12-09 | 2022-12-09 | Nano silicon dioxide aerogel external wall heat insulation sealant and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115895455B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109280523A (en) * | 2018-10-17 | 2019-01-29 | 东莞市沅邦电子材料有限公司 | Epoxy sealing glue |
| WO2019070193A1 (en) * | 2017-10-03 | 2019-04-11 | Bronx Creative & Design Centre Pte Ltd | Method of manufacturing silica aerogel composite |
| CN111117205A (en) * | 2019-08-27 | 2020-05-08 | 张媛婷 | Silica aerogel heat insulation sealing material |
-
2022
- 2022-12-09 CN CN202211577525.2A patent/CN115895455B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019070193A1 (en) * | 2017-10-03 | 2019-04-11 | Bronx Creative & Design Centre Pte Ltd | Method of manufacturing silica aerogel composite |
| CN109280523A (en) * | 2018-10-17 | 2019-01-29 | 东莞市沅邦电子材料有限公司 | Epoxy sealing glue |
| CN111117205A (en) * | 2019-08-27 | 2020-05-08 | 张媛婷 | Silica aerogel heat insulation sealing material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115895455A (en) | 2023-04-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4623390A (en) | Insulating paint for interior and exterior of buildings and method of making same | |
| CN101747689B (en) | Iron oxide red aqueous color paste for wood coatings and preparation thereof | |
| EP4116375A1 (en) | Ptfe composite powder, preparation method, and composite material containing ptfe composite powder | |
| CN108841043B (en) | Nano coating modified composite flame retardant for polyvinyl chloride material and preparation method thereof | |
| CN111909552A (en) | Water-based inorganic coating and preparation method thereof | |
| CN109777214B (en) | Graphene static conductive primer and preparation method thereof | |
| CN110564189A (en) | inorganic nano-coating and preparation method thereof | |
| CN104745013A (en) | Heat-insulating coating for external wall | |
| CN110903689B (en) | Hydrophobic modified ternary intumescent flame retardant, preparation method thereof and water-based intumescent fire retardant coating | |
| CN115895455B (en) | Nano silicon dioxide aerogel external wall heat insulation sealant and preparation method thereof | |
| CN114891409B (en) | Single-coating water-based ceramic heat-insulating anticorrosive paint for metal material and preparation method thereof | |
| CN114874493B (en) | High-density aerogel water-based paste and preparation method thereof | |
| CN115260808A (en) | A kind of natural antibacterial and fire-resistant inorganic coating and preparation method thereof | |
| CN112778819A (en) | Wetting dispersant and inorganic silicate coating | |
| CN103923531B (en) | A kind of preparation method of multi-usage iron oxide red aqueous color paste | |
| CN114874669B (en) | Energy-saving heat-preserving polymer modified asphalt waterproof paint and preparation method thereof | |
| JP2002348538A (en) | Curable composition for paint containing scaly silica particles and cured coating film | |
| CN116875124B (en) | Aerogel nanoparticle-based heat insulation coating and preparation method thereof | |
| CN115594999B (en) | Breathable mineral coating special for ultralow VOC concrete and preparation method thereof | |
| CN116102980B (en) | Anionic asphalt waterproof paint and preparation method and application thereof | |
| CN117264505B (en) | SiO (silicon dioxide)2Aerogel coating and preparation method thereof | |
| CN115368785A (en) | Water-based multicolor building coating and preparation method thereof | |
| CN112029408A (en) | Environment-friendly waterproof coating and preparation method thereof | |
| CN113637369B (en) | High-hardness water-based nano glass heat-insulating coating and application thereof | |
| CN109096821A (en) | A kind of ageing-resistant additive of building inorganic coating graphene and preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |