KR102285369B1 - Spraying method of aerogel insulation composition using silica sol-gel method - Google Patents

Abstract

The present invention relates to an aerogel insulation waterproof material composition using a silica sol-gel method and a spray method using the same, wherein water-soluble chemicals (chemicals A) containing silicate and water-soluble chemicals (chemicals B) which can provide silicate in a three-dimensional network structure by a silica sol-gel method are each in an independent two liquid-type container, aerogel powder and a water-soluble binder are configured to be selectively included in any one of the chemicals A or chemicals B, the water-soluble chemicals A and B which are independently constructed are moved to a sprayer by power, when spraying is required on a coating of a building wall body, the chemicals A and B are uniformly mixed by the sprayer, the mixed solution configured thereby is sprayed on a surface of the building wall body through the sprayer, and then an insulation waterproof film formed in a three-dimensional mesh structure with excellent thermal insulation and waterproof effect can be formed by a silica sol-gel method.

Description

External insulation waterproofing construction method using airgel insulation waterproofing material using silica sol-gel method {Spraying method of aerogel insulation composition using silica sol-gel method}

The present invention forms an insulation waterproofing composition containing airgel powder and silicate for thermal insulation waterproofing of a building, so that the insulation waterproofing composition is sprayed or coated on the floor, wall, roof, etc. of a building by the silica sol-gel method It is an airgel insulation waterproofing composition for forming a three-dimensional network and forming a gombo-type airgel insulation waterproofing coating layer on the surface of a building floor, wall, and roof, and a construction method related technology using the same.

Insulation materials are most often used as interior and exterior materials for insulation and fire protection of buildings such as houses and buildings, and the demand for high-performance and high-efficiency insulation materials is increasing amid the global trend of strengthening the insulation and fire resistance of buildings.

One of the main driving forces of the building insulation material market is the reduction of greenhouse gas emissions set by countries around the world.

In the future, non-combustible inorganic and high-performance organic insulation materials are expected to be in the spotlight due to the strengthening of insulation standards and the mandatory use of flame-retardant insulation materials and eco-friendly insulation materials along with the advancement and advancement of housing and buildings worldwide.

Insulation is to block the inflow and outflow of heat, and for effective insulation, materials that do not transfer heat well should be used in consideration of heat transfer by conduction, convection, and radiation. effective in blocking

Heat moves through walls, roofs, and floors through radiation, conduction, and convection. It is expected to be an optimal material for

Airgel is the lightest solid in the world, and it is named aerogel because it is made from gel, but its physical properties are very different from gel, and it is a very hard and light material, 98.2% of which is gas. Because it is made of , the density is only 0.003g/m3, which is three times that of air, so it is sometimes called bubble glass.

Airgel is not deformed by a weak force, but it is easily permanently deformed by a strong force over a certain level, and although it has the property of being easily broken by an impact, it is structurally very strong. This is due to the porous structure of the spherical particles.

Airgel is a very good insulator, and because of its hollow structure, the three methods of heat transfer, convection, radiation, and conduction, do not work well, and it may even have lower thermal conductivity than the gas constituting the airgel. It is a three-dimensional structure, and it is composed of a dense and very complex labyrinth shape, which prevents the free movement of gas particles. Therefore, it also has high waterproof properties.

The best performing aerogel is silica gel because silicon atoms themselves are much less thermally conductive than other metals or carbon.

Due to these characteristics, as airgel exhibits excellent performance as an insulating and waterproofing material, the performance of other insulating materials can be superior to that of other insulating materials even in a thin insulating layer such as paper.

In order to save energy and reduce the cost of insulation construction, we have been trying to find a way to directly construct a composition with excellent insulation and waterproof performance at a low cost at the construction site. same.

In Korea Patent Application Laid-Open No. 10-2018-0071070, an airgel sheet comprising an airgel heat insulating composition comprising an airgel powder, a fibrous heat insulating material, and an organic/inorganic composite binder, and an airgel heat insulating composition formed therewith is presented.

In Korea Patent Application Publication No. 10-2019-0079380, 50 parts by weight to 90 parts by weight of an aqueous solution containing a water-soluble binder; 5 parts by weight to 45 parts by weight of airgel powder; and 0.1 parts by weight to 10 parts by weight of an additive; is provided.

In Korea Patent Application No. 10-2018-0117504, it is a technology related to an airgel adhesive coating agent for packaging materials consisting of a backing layer between the outer laminated layer and the inner laminated layer. Silica airgel powder with excellent thermal insulation properties is used on one or both sides of the backing layer. By imparting the thermal insulation properties of silica airgel powder to the adhesive, the thermal insulation properties of nanoporous silica airgel powder can be maintained as much as possible, and the thermal insulation and fire-resistance packaging material consisting of a silica airgel powder layer that can increase the fire resistance function due to the incombustibility of silica. Coatings are presented.

In Korea Patent Application No. 10-2018-0145217, a non-woven fabric is coated with a heat-reflecting non-combustible liquid, which has high heat reflectivity and can effectively block radiant heat. has been

In Korea Patent Application No. 10-2019-0101151, the hydrophobic granular airgel and the hydrophilic adhesive powder are included and applied to suppress the static electricity generation of the hydrophobic granular airgel, thereby helping uniform dispersion, moisture permeability, waterproofing, and heat insulation A granular airgel composition capable of imparting functionality, such as, and a functional airgel sheet comprising the same are presented.

In Korea Patent Application No. 10-2017-0180137, 1 wt% to 10 wt% of porous silica powder, 1 wt% to 10 wt% of zeolite powder, 1 wt% to 20 wt% of silica airgel powder, water-soluble acrylic binder 20 having a specific composition A composition for forming a heat insulator comprising the remaining amount of water in order to ensure that the weight % to 50 wt % and the total content are 100 wt %, and a method for constructing a heat insulator using the composition are provided.

In the Korean Patent Application Laid-Open No. 10-2013-0078340, a step of preparing an aqueous solution in a gel state by mixing water, a superabsorbent polymer (SAP), a thermal insulation composition including a hydrophobic powder and a silicone binder, and a superabsorbent polymer (SAP), hydrophobicity A method for producing a heat-insulating composition comprising the steps of adding a powder and stirring to obtain an aqueous dispersion mixture, and adding a silicone binder to the aqueous dispersion mixture, and a heat-insulating substrate and a heat-insulating composition layer formed on the heat-insulating substrate Insulation materials are presented.

Korean Patent Application Laid-Open No. 10-2015-0108332 discloses an inorganic binder comprising two or more silicon-based compounds; and 5 to 50 parts by weight of airgel relative to 100 parts by weight of the inorganic binder; and a thermal insulation coating layer prepared therefrom are provided.

Korean Patent Application Laid-Open No. 10-2013-0168496 includes a polyamideimide resin dispersed in a high boiling point organic solvent or an aqueous solvent and an airgel dispersed in a low boiling point organic solvent, wherein the polyamideimide resin has a weight average molecular weight of 3,000 to 100,000. A thermal insulation coating composition having a boiling point difference between the high boiling point organic solvent and the low boiling point organic solvent of 10° C. or more is provided.

However, the technical idea of the present invention is to obtain a thermal insulation composition containing airgel powder and silicate for thermal insulation and waterproofing of a building and spray it on the floor, wall, and roof of a building by the silica sol-gel method. Insulation waterproofing material composition for forming a gombo-type airgel insulation waterproofing film on the surface of the building floor, wall, and roof by forming Even when they are applied in combination, it is a novel technology that cannot achieve the purpose of the present technology.

In the case of a building with excellent insulation effect, a pleasant living and working environment can be created so that you can spend cool summer and warm winter. Up to 20% to 30% of electricity bills can be saved by reducing the use time there is.

In addition, in the prior art, there was no method in the prior art to directly construct a composition that provides a thermal insulation effect at a low cost and shows a high waterproofing effect using the hydrophobic property of the airgel not only for the energy saving problem but also for the construction cost reduction. , the inventors of the present application are required to develop a technology that can minimize the economic burden by minimizing the construction cost while simultaneously having a thermal insulation effect and a waterproof effect. An external waterproofing method for forming a coating film by a gel method has not yet been disclosed.

In this application, the airgel powder with excellent insulation and waterproofing effect is composed of a silica sol-gel method, and when sprayed on the surface of the building floor, wall, or roof through a sprayer, a three-dimensional network structure of insulation waterproofing film layer is formed within minutes. Accordingly, it is an object to provide an airgel insulation and waterproofing material using the silica sol-gel method that provides insulation and waterproof coating film formation that obtains insulation and waterproofing effects at low cost through a simple process.

In addition, this institute uses airgel insulation waterproofing materials to simultaneously provide insulation and waterproofing effects on the floor, wall, and roof of a building by a low-cost and simple method such as airless spray spraying, and minimize the construction cost to utilize airgel at various construction-related construction sites. It has an object to provide an external waterproof construction method to form a coating film by the silica sol-gel method.

In order to achieve the above object, the present application provides a water-soluble drug containing silicate (drug A) and a water-soluble drug (drug B) that can provide silicate in a three-dimensional network structure by silica sol-gel method in an independent two-component container. The airgel powder and the water-soluble binder are each configured to be selectively included in either part of the drug A or the drug B, and the water-soluble drug A and the drug B independently configured by power are moved to the nebulizer, and from the nebulizer A Silica sol gel method after the mixed solution is sprayed on the surface of the building floor, wall, and roof through a sprayer on the floor, wall, or roof of a building that is prepared so that the drug and drug B are mixed in a uniform ratio and that requires insulation and waterproof performance It is an invention of the technical idea to provide an airgel insulation waterproofing material using silica sol-gel method that can form a three-dimensional network structure insulation waterproofing film with excellent insulation and waterproofing effect and an external waterproofing construction method using the same.

Hereinafter, the technical idea of the present application will be described in detail as follows.

The water-soluble drug A containing the silicate is selected from one or more types of sodium silicate, powdered sodium silicate, potassium silicate, lithium silicate, and sodium aluminum silicate, preferably the silicate is 100% water. It is advantageous to maintain a solution state diluted with 8.5 to 55 parts by weight based on weight, more preferably maintained in a solution state diluted with 15 to 45 parts by weight, and most preferably 20 parts by weight It is advantageous to maintain a solution state diluted to 30 parts by weight or less, and when the silicate is maintained in a diluted solution state to 8.5 parts by weight or less, when it is poured on the wall of a building through a sprayer, a three-dimensional network by the silica sol-gel method There is a problem that there is a possibility that the mixed agent of A + B poured on the wall surface may flow down to the floor due to insufficient structural function. When power is applied to achieve a three-dimensional network structure by the silica sol-gel method, water-soluble agent A and agent B are mixed inside the sprayer and discharged on the surface of the building wall. It has the advantage of providing a durable insulating coating film by constructing a type insulation coating film, but in order to form a three-dimensional network, agent B due to the use of high-concentration silicate also has to be used at a relatively high concentration of silicate, so the economic feasibility is low. Since there is a problem, it is preferable to use silicate diluted to the concentration suggested above.

The water-soluble drug B, which can provide the silicate in a three-dimensional network structure by the silica sol-gel method, may contain acid or bicarbonate.

The acid (Acid) used in the B drug is mixed with the strong alkali silicate (A drug) by an external force, and when the mixed solution containing the strong alkali silicate is configured to have a pH of 8.0 or less, as shown in the following Reaction Formula 1 As the purpose of providing a gel of a three-dimensional network structure by the silica sol-gel method, there is no special limitation according to the technical idea of the present application, and the harm to the human body due to air pollution during the dilution process is reduced. Any acid that is not added can be said to be possible.

At this time, the organic or inorganic acid is at least one acid selected from hydrochloric acid, nitric acid, sulfuric acid, phosphoric acid, hydrofluoric acid, formic acid, acetic acid, citric acid, maleic acid, oleic acid, and sulfonic acid, based on 100 parts by weight of water. It is preferable to use the acid (Acid) diluted by 2 to 35 parts by weight.

M ₂ O·nSiO ₂ + H ₂ SO ₄ → nSiO ₂ (silica gel form) + M ₂ SO ₄ -----<Reaction Scheme 1>

(M = Na, K, NH4, Li)

(n = constant)

The purpose of the bicarbonate is to provide a gel having a three-dimensional network structure by the silica sol-gel method as shown in Scheme 2 below when the bicarbonate is supplied to drug A containing silicate.

The bicarbonate is sodium bicarbonate (Sodium bicarbonate), potassium bicarbonate (Potassium bicarbonate), ammonium bicarbonate (Ammonium bicarbonate), lithium bicarbonate (Lithium bicarbonate) at least one kind is selected, based on 100 parts by weight of water 0.5 to It is preferable to consist of 6.5 parts by weight.

M ₂ O·nSiO ₂ +HCO ² → nSiO ₂ (silica gel form)+M ₂ CO ₃ +LOH---<Scheme 2>

(M = Na, K, NH4, Li)

(L = Na, K, NH4, Li)

(n = constant)

The airgel is configured to be selectively included in any one part of the drug A or drug B, and is made of silicon oxide (SiO2) and dried without shrinkage of a wet gel prepared through a silica sol-gel reaction. As a super-porous nanostructured material that maintains the pore structure of Can be used, based on 100 parts by weight of the total weight of the drug A to drug B composition, the airgel may be configured to contain 25 to 150 parts by weight, more preferably 40 to 100 parts by weight is advantageous and, most preferably 60 to 80 parts by weight is advantageously included. When the airgel is included in 25 parts by weight or less, it has the advantage of minimizing the cost of expensive airgel, but is formed on the floor, wall, roof surface of the building. There is a problem that the insulation and waterproofing effect of the Gombo-type coating film is insufficient, and when airgel is included in 150 parts by weight or more, as the content of airgel increases, it is possible to provide an insulation waterproof coating film with high insulation waterproof effect, but the Since the specific gravity is low, workability may be greatly reduced as the volume per unit weight increases, and since the cost for construction is high due to the high unit price, it is preferable to mix in the ratio suggested above.

The water-soluble binder is configured to be selectively included in either part of the drug A or drug B, can be mixed with the drug A or drug B in an aqueous atmosphere, and the drug A + B is sprayed on the surface of the building wall. When the moisture contained in the insulating coating film is completely evaporated, the purpose is to provide durability and water resistance by the binder, and the water-soluble binder is acrylic emulsion resin, urethane emulsion resin, ethylene-vinyl acetate emulsion resin, epoxy emulsion resin, vinyl acetate At least one selected from the emulsion resin is selected and used, and when the total weight of the drug A or drug B is 100 parts by weight, the water-soluble binder is preferably comprised of 15 to 35 parts by weight.

In the prior art, plate-type insulation has been installed inside and outside the building as a means to save energy and provide a comfortable indoor space. The performance of the insulation deteriorated due to the inflow of water through the cracks that occurred during the insulation construction process, and serious problems were occurring in the field due to the inflow of water as a cause of water leakage.

However, as the technical configuration of the present application is in the form of a spray or coating, construction is possible regardless of any shape or structure of the surface of the building floor, wall, or roof, and once it is installed on the wall, it is a three-dimensional network by chemical reaction. As a solid insulation and waterproof coating layer is formed by formation, it forms a strong adhesion to the base surface to achieve perfect insulation and waterproof performance at an affordable price and quickly, and no separate maintenance and management are required. Accordingly, it has the effect of providing a great advantage in reducing energy saving and building management costs.

Figure 1: A drawing of an application example of the spraying device shown in an internal perspective form to explain the application principle of the coating liquid spraying device for the technical configuration of the present application

Prior to describing the embodiments of the invention for implementing the technical idea of the present application, the terms or words used in the specification or claims of the present application should not be construed as being limited to conventional or dictionary meanings, The protection scope of the present application should be interpreted in the meaning and concept consistent with the technical idea of the present invention.

In addition, since the examples of the invention described in the present specification are only examples of one preferred embodiment and do not represent all the technical ideas of the present application, various equivalents and modifications that can be substituted for them at the time of the present application are provided. It should be understood that there may be

Hereinafter, the present invention will be described in detail by way of examples to which the technical idea of the present application is applied.

Example 1

To implement the technical configuration of the present application, 50 g of liquid sodium silicate (3 types) purchased from Youngil Hwaseong Co., Ltd., 140 g of water-dispersible airgel of RM Tech Co., Ltd. and 500 ml of tap water were measured in a bucket and mixed evenly Prepare one drug A, measure 10 sulfuric acid (Samjeon Pure Medicine) in another bucket, carefully supply 500 ml of tap water, measure 80 g of acrylic emulsion resin (Youngjin Texchem), and then mix drug B was prepared.

Example 2

In a bucket, measure 125 g of liquid potassium silicate purchased from Youngil Hwaseong Co., Ltd., 300 g of water-dispersible airgel of RM Tech Co., Ltd. and 500 ml of tap water, and prepare drug A, which is uniformly mixed, and put in another bucket. After weighing 100 g of sulfuric acid (Samjeon Pure Chemical), 500 ml of tap water was carefully supplied, and 150 g of acrylic emulsion resin (Youngjin Texchem) was weighed, and then the mixed drug B was prepared.

Example 3

In a bucket, measure 250 g of liquid sodium silicate (3 types) purchased from Youngil Hwaseong Co., Ltd., 750 g of water-dispersible airgel of RM Tech Co., Ltd. and 500 ml of tap water, and prepare drug A, which is uniformly mixed, and After measuring 5 g of sodium bicarbonate (NaHCO ₃ ) in a bucket and dissolving it by supplying 500 ml of tap water, 75 g of an ethylene vinyl acetate emulsion resin (Taeyoung Techpol) was weighed, and then a mixed drug B was prepared.

Example 4

In a bucket, measure 250 g of liquid sodium silicate (3 types) purchased from Youngil Hwaseong Co., Ltd., 750 g of water-dispersible airgel of RM Tech Co., Ltd. and 500 ml of tap water, and prepare drug A, which is uniformly mixed, and After measuring 33 g of potassium bicarbonate (KHCO ₃ ) in a bucket and dissolving it by supplying 500 ml of tap water, 150 g of an ethylene vinyl acetate emulsion resin (Taeyoung Techpol) was weighed, and then a mixed drug B was prepared.

Comparative Examples 1 to 4

Instead of airgel, sand No. 6 is supplied to drug A, and acid or bicarbonate, a water-soluble drug that can be provided in a three-dimensional network structure by silica sol-gel method, is not supplied to drug B. The upper part was applied in the same manner as in Examples 1-4.

In order to check the setting time by the silica sol-gel method for the compositions of Examples 1 to 4 and Comparative Examples 1 to 4, 250 ml of each of the prepared compositions A and B were taken, and then the compositions of A and B were mixed. The gelation time from one hour to the completion of the three-dimensional network of silicate was to be confirmed and measured. In addition, in order to check the insulation effect, after mixing the same amount of the compositions of A and B of Examples 1 to 4 and Comparative Examples 1 to 4, immediately after injection into a ∮100×3.0t sized coating mold, the moisture is completely removed When an isothermal heat source of 80° C. was supplied to the upper surface of the coating film, the temperature of the lower surface of the coating film was measured with an infrared thermometer (Raytek's Raynger "ST"), and the test results are shown in Table 1.

division Gel time
(candle) Measured temperature ( ^o C) upper surface lower surface Example 1 13 80 36.4 Example 2 8 80 33.7 Example 3 94 80 31.0 Example 4 52 80 27.4 Comparative Example 1 - 80 76.5 Comparative Example 2 - 80 76.1 Comparative Example 3 - 80 76.8 Comparative Example 4 - 80 76.5

As shown in the analysis results of Table 1, in the case of Comparative Examples 1 to 4, the airgel insulation and waterproofing material composition did not exist, and the upper surface of the 3 mm coating film prepared in place of the sand powder of No. 6 (60 to 80 mesh) was 80 ° C. As the temperature of the lower surface of the coating film was about 76°C while maintaining the isothermal state of It was confirmed that gelation does not occur at all when there is no composition capable of providing a three-dimensional network.

Therefore, it was confirmed that it was not possible to provide a coating film for providing a thermal insulation effect to the surface of a building in a simple way in a short time, whereas in the case of a composition in which airgel is present as in Examples 1 to 4, the upper surface of the 3 mm coating film had a temperature of 80 ° C. When the isothermal state was maintained, the temperature of the lower surface of the coating film was 27~36℃, confirming that the insulation effect was very good at a level that could be touched by hand.

1 is a drawing of an application example of an injection device shown in an internal perspective form to explain the application principle of the coating liquid injection device for the technical configuration of the present application. B. When drug A and drug B are extruded while controlling the discharge amount by a compression means such as a cylinder, and drug A and drug B are mixed and sprayed or applied to a site that requires simultaneous insulation/waterproof coating and coated silica sol gel method By arbitrarily controlling the gelation by By means of controlling the pressure, spraying or coating can be carried out in a simple, easy and convenient way.

Therefore, it is expected that a comfortable living and working environment will be created regardless of summer or winter by obtaining insulation effect for energy saving in an inexpensive, easy and convenient way through the technical idea of this application.

1 is a view showing an application example of the coating liquid injection device according to the technical configuration of the present application, wherein the drug A and the drug B are made in the same form as in the above embodiment and put in a container, and the drug A and the drug B by a compression means such as a syringe or cylinder An example of an application example of a spraying device for a coating solution applied to be sprayed or applied to a site that requires drug A and drug B to be mixed and simultaneously insulating and waterproof coating by extruding while controlling the discharge amount of drug B.

Claims (5)

In the construction method of the insulation waterproofing composition in which the airgel powder is used and the silica sol gel method is applied,
When the silicate selected from liquid sodium silicate, powder sodium silicate, potassium silicate, lithium silicate, and sodium aluminum silicate is diluted in the range of 8.5 to 55 parts by weight based on 100 parts by weight of water, drug A, which is provided as an aqueous solution, is in the container. being kept
The water-soluble drug B, which can react with the drug A and provide a three-dimensional network structure by the silica sol-gel method, is mixed with the drug A so that the mixed solution meets the conditions of pH 8.0 or less hydrochloric acid, nitric acid, sulfuric acid, phosphoric acid , hydrofluoric acid, formic acid, acetic acid, citric acid, maleic acid, oleic acid, and sulfonic acid is diluted to 2 to 35 parts by weight based on 100 parts by weight of water, and drug B is provided as an aqueous solution in another container is configured to be stored independently in
Airgel powder and a water-soluble binder are included in either one of the A drug or B drug to form an insulating waterproof composition,
Water-soluble drug A and drug B are each moved to the sprayer by power, and agent A and agent B are mixed in a uniform ratio in the sprayer, so that the mixed solution is applied to the floor, walls, and roof surfaces of buildings that require insulation and waterproofing performance. When sprayed or coated, the construction method of the insulating waterproofing composition using the silica sol-gel method, characterized in that it comprises a configuration applied to form an insulating waterproof film of a three-dimensional network structure having excellent thermal insulation and waterproofing effect by the silica sol-gel method. . delete According to claim 1,
When the water-soluble drug B is a bicarbonate selected from sodium bicarbonate, potassium bicarbonate, ammonium bicarbonate, and lithium bicarbonate instead of acid based on 100 parts by weight of water A construction method of a thermal insulation waterproofing composition using a silica sol-gel method, characterized in that it is modified to be used in the range of 0.5 to 6.5 parts by weight. According to claim 1,
The airgel has a porosity of 90% or more and a pore size of 1 to 50 nm, and the airgel having a thermal conductivity of 0.007 to 0.1 W/m·K is based on the weight of the pharmaceutical A and the B pharmaceutical composition 100 parts by weight. A method of constructing a thermal insulation waterproofing composition using a silica sol-gel method, characterized in that it is applied in a proportion of 25 to 150 parts by weight of airgel. According to claim 1,
The water-soluble binder is selected from acrylic emulsion resin, urethane emulsion resin, ethylene-vinyl acetate emulsion resin, epoxy emulsion resin, and vinyl acetate emulsion resin. Construction method of a heat insulating waterproofing composition using a silica sol-gel method, characterized in that it is applied to be used in a ratio of ~ 35 parts by weight.

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