KR20080104770A - The painting layer and painting method for radon radiation - Google Patents

Abstract

A painting method and a painting layer for blocking radon radiation are provided to fundamentally block radon radiation radiated from the concrete wall surface by painting compact high density particles on a concrete wall surface. A method of painting a wall surface comprises: a primer coating process of mixing 20 to 60% by weight of an acryl/styrene copolymer emulsion resin, 1 to 10% by weight of an aid consisting of a film-supporting agent and a dispersant, and the balance of water to prepare 100% by weight of a mixture, and painting the mixture as a primer(10) on the wall surface; an intermediate coating process of applying an aqueous paint as an intermediate coat(20) in which 1 to 30% by weight of an acryl/styrene copolymer emulsion resin, 10 to 80% by weight of a functional inorganic material, and the balance of water onto the top of the primer after the primer has been dried; and a top coating process of applying 100% by weight of a paint as a top coat(30) in which 10 to 50% by weight of an acryl/styrene copolymer emulsion resin, 1 to 40% by weight of titanium dioxide, 10 to 50% by weight of a functional inorganic material, and the balance of an aid consisting of a film-supporting agent and a dispersant onto the top of the intermediate coat after the intermediate coat has been dried.

Description

Radon radiation shielding coating method and the coating layer {The painting layer and painting method for radon radiation}

1 is a view showing a coating layer of the present invention.

<Brief description of the major symbols in the drawing shown>

10; 20 degrees; Midway

30; normal course

The present invention relates to a coating method for painting a concrete wall and its coating layer, and in particular, while painting in a layer with a lower, medium, and top layer, by injecting appropriately high density and dense particles and components in each layer on the concrete wall The present invention relates to a radon radiation shielding coating method and a coating layer which fundamentally block emitted radon radiation.

In general, radon (Rn-222) is a substance produced by the collapse of about 70 kinds of natural radioactive substances found on the earth, and is a gaseous substance that emits alpha rays, which pose a risk of lung cancer. All underground and aboveground structures and buildings, including those, are likely to be present at high concentrations. Therefore, it is necessary to measure radon concentration periodically in this kind of structure or building. In particular, in the present situation where houses of cement concrete are mainstream, radon is emitted from building aggregates, construction materials, or cement concrete.In addition to sick house syndrome, the health environment is not affected by radon radiation in older indoor residential environments. Seriously threatened.

The concentration of radon in indoor air quality was set at 4 pCi / ℓ or less based on the "Air Quality Control Act for Multi-Use Facilities", and the Korea Institute of Nuclear Safety (KINS) targets 3,866 households in Korea. Measured radon gas concentrations by 3.4% and exceeded the indoor air quality standards of the Ministry of Environment. In addition, 44 subway stations and waiting rooms were measured by Kyung Hee University's Air Pollution Laboratory (Professor Dong-Sul Kim), and five of the platforms and four of the waiting rooms exceeded the standard. Therefore, it can be said that the radon reduction construction based on the radon release rate is required when the radon concentration is measured high.

The method of reducing radon indoors currently used in Korea includes a method of blocking a gap or frequently ventilating it as a sealing agent to prevent radon gas coming through a building gap, or using radon gas that is sucked in dust. It is an air purifier that has high removal efficiency.

However, for radon gas emitted from concrete walls, floors, and ceilings in addition to building gaps, radon gas may be added to the concrete by suppressing the release rate of radon by adding a radon blocker (Patent No. 10-454753) to the concrete. The blocking effect of the emission rate does not exceed 30%.

In addition, even when using the finishing material (patent registration No. 10-65004) applied to concrete walls and building materials, radon blocking force is about 52%, and relying on ventilation or air purifier is not only effective but also a limiting method. It can be expected that economic losses will occur.

Accordingly, the present inventors endeavored to solve the conventional problems, thereby completing the present invention by confirming the blocking effect of radon by coating the system with an environmentally friendly paint that protects or improves indoor air quality.

The present invention, which solves the above problems, relates to a coating method for coating a concrete wall surface and a coating layer thereof, and in particular, to paint while forming a layer in the lower, middle, and upper layers, and the components forming the layers appropriately for each layer. It is intended to provide a radon radiation shielding coating method and its coating layer which fundamentally block radon radiation emitted from concrete walls by coating with high density and dense particles.

Therefore, the present invention is a method of painting on the wall surface, the first step: 20-60% acrylic / styrene copolymer emulsion resin, 1-10% of the preparation consisting of a film forming agent dispersant, and the remaining water is added to 100% by weight An undercoat process that mixes and mixes it on the wall; Second step: After the lower channel is dried, 1-10% of the acrylic / styrene copolymer emulsion resin, 10-80% of functional inorganic material, and the dispersant of the film forming agent is added, and the remainder is 100% by weight of water. A middle step of applying a mixed water-soluble paint on the wall; Step 3: After the intermediate is dried, 1-10% of an acrylic / styrene copolymer emulsion resin, 10-40% of titanium dioxide, 10-50% of functional inorganic materials, and a film dispersant. And the remainder is a top coat step of applying the paint mixed with 100% by weight by adding water; It is intended to provide a radon radiation shielding coating method that essentially blocks the radon radiation emitted from the interior of the concrete wall surface.

In addition, the present invention is a paint layer coated on the wall surface, at the bottom of the wall surface, 20-60% of acrylic / styrene copolymer emulsion resin, the preparation 1-10% of the film forming agent dispersant, and the rest of the water by adding a weight ratio Hado, which is coated with 100% of the mixed paint and dried; A water-soluble paint mixed with 1-30% of an acrylic / styrene copolymer emulsion resin, 10-80% of functional inorganic materials, and a film dispersant, and a balance of 100% by weight of water in the upper part of the bottom. The middle degree of which is applied to the wall surface and dried; Into the upper portion of the intermediate, 10-50% of the acrylic / styrene copolymer emulsion resin, 1-40% of titanium dioxide, 10-50% of the functional inorganic material, and the remainder were added with a weight ratio of 100%. A top coat dried by applying the mixed paint; It is intended to provide a radon radiation shielding coating layer which is layered with each other to fundamentally block radon radiation emitted from the inside of the concrete wall.

The present invention relates to a method of painting on a wall.

Therefore, the coating method is demonstrated in detail according to the order.

First of all, the present invention has the same purpose and the same purpose as the "radon radiation shielding coating method and its coating layer" of the same applicant, but its input material is different. And it is a big feature that the surface of the concrete wall is painted three times in the order of the lower, middle, upper phase, each layer is combined with each other to thoroughly block the radon radiation harmful to the human body radiated from the concrete wall.

The present invention is the first step: 20-60% acrylic / styrene copolymerized emulsion resin, 1-10% of the formulation comprising a film dispersant, and the rest is mixed with water by adding 100% by weight and applying it to the wall ( 10) Go through the process. That is, the acrylic / styrene copolymer emulsion resin which leads to a binder is thrown in. This input is about 20-60% of the total weight of all components put into the bottom by weight. And 1-10% of the preparation consisting of the film forming agent dispersant is added. In addition, water is added to the mixture of the preparation and the binder, which is insufficient in the weight ratio of 100% in the input amount of the preparation and the binder, that is, the remaining weight is added to the water.

So here's a look at the components you'll need to make paint for general painting. In other words, a paint, a binder, a preparation, a solvent, and a pigment are largely charged. The above input elements do not always have to be used together. The embodiment differs according to the place characteristic of painting and the purpose of painting. That is, some of the above input elements may be missing, and a leveling agent or other elements may be added.

In any case, in such paints, in the case of the binder, it is common to add the bond between the components to be added to the paint to be more robust and to improve its durability and adhesion. The binder also plays a role in preventing the paint from being eroded by weathering or moisture. And, in the case of the preparation, the components are introduced to each other when mixed with each other, but it is an attachment attached for a specific purpose according to the place characteristics for painting. That is, a wide variety of elements are used to be used depending on the purpose of use, such as the elements that are put in for the purpose of waterproofing or the elements put in for antibacterial properties. In addition, the solvent is introduced such that the binder, the preparation and the pigment are well released from each other. Of course, by adding such a solvent there is a feature that can control the viscosity of the paint for painting, it is possible to control the phenomenon that the paint is applied in agglomeration without flowing down in accordance with the situation of the wall due to the adjustment of the viscosity. Next, pigments are added to create a suitable color for painting the painted wall, which is so diverse that they can be selected and used by users.

Then, to describe the coating method of the next step of the present invention, the second step: After the undercoat (10) is dried, 1-30% acrylic / styrene copolymer emulsion resin, 10-80% functional inorganic material and a film forming agent dispersant 1-10% of the formulation and the rest is put in water, there is a middle (20) process of applying a water-soluble paint mixed with 100% by weight on the wall. That is, after coating the undercoat paint prepared for painting the undercoat on the wall surface, the wall surface is firmly dried, absorbed and adhered to the surface, and then the intermediate paint is painted on the top of the undercoat. In this case, acrylic / styrene copolymer emulsion resin, functional inorganic material, and water are mixed and prepared by weight ratio. The copolymer emulsion resin functions as a binder, and in the case of functional inorganic material, it acts as a pigment. It acts as a solvent. Therefore, the binder enhances its durability when mixing and drying the pigment, and water, which is a solvent, makes the work more convenient during application by adjusting the viscosity.

Next, the present invention is a third step: after the intermediate (20) is dried, 10-50% acrylic / styrene copolymer emulsion resin, 1-40% titanium dioxide, 10-50% functional inorganic material, film forming agent 1-10% of the formulation consisting of a dispersant and the rest is finished by a process of coating 30, which is applied to the middle 20 of a paint mixed with 100% by weight of water. That is, when the pre-painted intermediate is dried, the paint, which is mixed with a binder, a pigment, a functional inorganic material, and a preparation, is mixed and applied at the appropriate weight ratio. Of course, at this time, the emulsion resin serves as a binder, the functional inorganic material and titanium dioxide as a pigment, and the film forming agent and the dispersing agent serve as a preparation agent. However, the film forming agent and the dispersing agent are in the same class of preparations, and are specifically classified and described in the present invention, since the characteristics of the present invention have a function different from that of a conventional paint which fundamentally blocks the release of radon radiation.

Then look at the properties of each of the components used in the present invention, and look at the action and properties of each of the top, mid, and bottom layers that appear when it is applied to the wall using the added paint.

First, in the case of acrylic / styrene copolymer emulsion resin, which is a binder used in the above coating method, it is widely used in current paints, and has a dense structure and excellent binding force, so that the binder does not easily fall off when applied to the wall surface. Therefore, such a binder is added when manufacturing paint for painting, and it is added to an adhesive for other uses.

And the film-forming agent and dispersant which are preparations used in the work process of the 1st, 2nd, and 3rd step of this invention, the intermediate | middle, and the upper coat, are put into the paint of this invention, and take unique functionality. In other words, the film forming agent has the effect of waterproofing and moisture-proofing to fundamentally block the penetration of moisture that may occur on the painted wall to prevent the disintegration or erosion of the paint layer and to increase the durability of the coating. Will be. Of course, the above-described binder also functions to some extent but is not perfect. Therefore, a separate waterproofing agent is used, but in the present invention, it is always added to improve its durability. Of course, there is also a concrete wall surface does not require the addition of the waterproofing agent depending on the working environment. And in the case of dispersants used as another preparation, it is used to achieve proper mixing between the components constituting the paint. That is, in order to form the paint of the present invention, various components such as the above-described solvents, pigments, preparations, and binders are required. However, not all of these components can be used as components that can be fused to each other physically or chemically. Concerned about such inconsistencies, the dispersant is added to allow each component to be easily mixed and maintained in an appropriate distribution.

In addition, the functional inorganic material used in the present invention mostly uses a general mineral, to prevent the phenomenon of radon radiation penetrating through the body by using an inorganic material having a dense particle structure of the mineral. Therefore, in the present invention, care was taken in selecting such a functional inorganic material. The kind and characteristic are mentioned later.

Next, the pigment titanium dioxide is a pure white metal oxide. In the case of the titanium dioxide, its structure is dense and solid, improving the durability of the coated top layer and improving impact resistance. In addition, in the present invention, the repulsive force and resistance to water resistance and external stimulation are high, and thus, it is included in the top layer to block the release of radon radiation.

In the present invention, in the preparation of the preparation of the first step, the second step and the third step, it is preferable to add 1-60% of the film forming agent and add the dispersant to adjust the weight ratio to 100%. That is, in the production of the paint coat and the top coat, the weight ratio of 1-10%, which is the preparation ratio of the bottom coat, is regarded as 100, and the film-forming agent is added at a weight ratio of 1-60%, and the dispersant is added to the rest. will be. In the case of top coat, 100% of the total amount of the binder, pigment, functional inorganic material and the preparation is added to the water without specifying a specific ratio, but the dosage of the preparation is regarded as 100 and the weight ratio of the film forming agent is 1-60%. And the rest is added to the dispersant.

In addition, in the preparation of the first, second, and third steps described above, one or more of a cryoprotectant, an antibacterial agent, a thickener, a surfactant, and an antifoaming agent may be selectively added to form a preparation. That is, since the preparation shows the functionality, there exists a necessary function depending on the environment of the wall surface to be painted. Various preparations are selected and put into this function. Therefore, in the present invention, in addition to the dispersant and the film forming agent, which is the basic preparation, one or more cryoprotectants, antibacterial agents, thickeners, surfactants, and antifoaming agents are added.

Wherein the cryoprotectant to minimize the expansion and contraction of the volume by the change in temperature, it is possible to improve the durability of the paint even at cold temperatures. Therefore, it is desirable to add this cryoprotectant to areas painted in cold areas or spaces. Next, the antimicrobial agent prevents the decay of the injected water and suppresses the growth of mold and bacteria in the coated coating film. That is, by providing antimicrobial properties to the paint to improve the more reliable durability. Thickeners are then added to prevent settling of the pigments in the paint and to maintain an appropriate viscosity. It is often difficult to adjust the viscosity using a solvent, so that the thickener is added, and paint is required to have an appropriate viscosity depending on the environment of the wall surface to be painted. The reason is to prevent dripping and agglomeration during painting. Next, the surfactant is added to mix the organic and inorganic well. In other words, water and oil are not fused well in the natural state, but when the surfactant is added, the fusion is promoted. The antifoam is then added to let the foam go out. That is, there is a high possibility of foaming due to the stirring action during paint production, and foaming is high due to the harmony between the components. Of course, when painting is performed in the presence of such bubbles, the painting may not be smooth, and some staining may occur. Therefore, antifoaming agent is added to completely remove these bubbles.

In addition, the functional inorganic material of the second step and the third step of the present invention, one or more of talc, calcium carbonate, aluminum silicate, diatomaceous earth may be used. All inorganic materials used in the present invention are added to block the release of radon. Thus, the talc, calcium carbonate, aluminum silicate, and diatomaceous earth all have a dense tissue structure, which prevents the release of radon. At this time, the functional inorganic material introduced in the present invention is added to the diatomaceous earth at a mass ratio of calcium carbonate 30-80%, talc 30-80%, aluminum silicate 1-10% and 100%. At this time, the percentage is a ratio in which all four components are input, but in the present invention, since two or more may be input, each input ratio may be changed accordingly. The variation can also be large, so further limitations are omitted.

Then look at the properties of the injected inorganic material. First, calcium carbonate is a component that increases smoothness by blocking pores or holes when applied to the wall. Therefore, when the calcium carbonate is added, it also plays a role of allowing the paint applied to the upper part to be applied better, and also serves as a smooth wall. And in the case of talc has the same role as the calcium carbonate, but also has the function of high wash resistance, adhesion. And next, the aluminum silicate serves to prevent the calcium carbonate and talc from sedimenting because the calcium carbonate and talc have a specific gravity. Eventually, it serves to keep the viscosity constant. Finally, in the case of diatomaceous earth, it plays the same role as the calcium carbonate. That is, it is possible to selectively use and complement each other.

On the other hand, it is preferable that the average particle diameter of the said acrylic / styrene copolymer emulsion resin used by this invention has a particle diameter of 1-500 nm, and the particle diameter of the said functional inorganic material has a particle diameter of 1-40 micrometers. That is, the paint of the present invention has a particle diameter as described above because it can have a more compact structure only if it has a very fine particle diameter.

The undercoat 10 is 1-100 μm thick, the midway 20 is coated with a thickness of 20-1,000 μm, and the top coat 30 is preferably layered with a thickness of 10-400 μm. The undercoat is first applied to the wall to block the release of radon, and the middle and top coats are also painted on the surface and play the same role. At this time, it was most effective to keep the intermediate thickness thickest. Of course, this has been proven in many experiments.

Furthermore, it is preferable that the thickness shaping | molding temperature of the said upper, middle and lower coats 30, 20, 10 is dried at 5-35 degreeC. That is, although the temperature conditions for drying may vary depending on the conditions of the place to be painted, it is most preferable to maintain the temperature of 5 ~ 35 ℃. And the scope of all the numerical limitations described above in the present invention reveals that the applicant is the most desirable value proved through a number of experiments.

In the above, the coating method to minimize and block the radon radiation emitted from the concrete wall has been described. However, in the present invention, the coating method is not the only subject matter, and the coating layer coated by the coating method, that is, the coating layers of the lower, middle, and top coat layers, is also the subject of the claim. Therefore, the coating layer is demonstrated in detail.

The present invention is a paint layer coated on the wall surface, at the bottom of the wall surface, 20-60% of acrylic / styrene copolymerized emulsion resin, 1-10% of the preparation consisting of a film dispersant, and the rest of the water by adding a weight ratio of 100 There is a coating (10) which is dried by applying the mixed paint according to%, and composed of 1-30% of acrylic / styrene copolymer emulsion resin, 10-80% of functional inorganic material, and a film forming agent dispersant on top of the coating (10). 1-10% of the preparation, and the remainder of the water-soluble paint mixed with a weight ratio of 100% by applying water on the wall surface is dried (20). In addition, the upper part of the intermediate (20), the acrylic / styrene copolymer emulsion resin 10-50%, titanium dioxide 1-40%, functional inorganic material 10-50%, and the rest of the preparation 1-10 composed of a film forming agent dispersant There is a top coat 30, which is coated and dried with a mixture of 100% by weight and the remaining water added. Therefore, they are layered on each other to essentially block radon radiation emitted from the inside of the concrete wall.

That is, since the components of the coating method described above are utilized and painted as they are, detailed description thereof will be omitted.

At this time, the preparation is 1-60% of the film preparation and the rest of the dispersant to adjust the weight ratio 100%, and the cryoprotectant, antimicrobial agent, thickener, surfactant, antifoaming agent may be optionally added to form the preparation. That is, in the present invention, the dispersant and the film forming agent are essentially added, but there is a difference that the cryoprotectant, antibacterial agent, thickener, surfactant, and antifoaming agent may be selectively added.

The functional inorganic material may be used by adding one or more of talc, calcium carbonate, aluminum silicate, diatomaceous earth, the average particle diameter of the acrylic / styrene copolymer emulsion resin has a particle diameter of 1-500nm, the particle diameter of the functional inorganic material is It has a particle diameter of 1-40 μm. That is, the same as described in the above-described coating method.

The undercoat 10 is 1-100 μm thick, the midway 20 is 20-1,000 μm thick, and the top coat 30 is 10-400 μm thick.

Furthermore, it is preferable that the thickness shaping | molding temperature of the said upper, middle and lower coats 30, 20, 10 is dried at 5-35 degreeC.

As described above, the present invention provides radon gas by blocking paint using polymer binders such as acrylic / styrene copolymer emulsion resin and sieving pigments such as calcium carbonate, talc, aluminum silicate, and diatomaceous earth, which are generally used in special inorganic materials or water-soluble paints. It acts to increase the radon blocking rate by inhibiting release or inducing collapse. In addition, by containing titanium dioxide in the water-soluble paints to effectively block the radiation of radon, the cause of lung cancer. In addition, the concrete cement mortar is sufficiently cured for 28 days or more, and then coated at a pH of 9 or less and a water content of 10% or less, and the coating interval in the coating system is preferable to minimize the surface water content after drying. If there is too much water on the surface, radon gas suppression efficiency is lowered. Therefore, it is preferable to dry sufficiently within the coating interval time.

Hereinafter, the present invention will be described in more detail with reference to the following examples.

<Table 1> Radon blocking rate test results of experiments 1, 2 and 3

One 2 3 4 5 6  Background Psalms ○ ○ ○ ○ ○ ○  Wallpaper wallpaper ○  The present invention ○  Midway of the invention ○ ○ ○  The present invention ○ ○ ○ Radon Radiation (pCi / ㎡h) 22.8 ~ 23.6 22.2 15.81 13.49 15.42 8.78 Radon blocking rate (%)     0 3.06 28.75 39.21 32.65 62.80

The ground specimen size used in the experiment of the present invention was a cement brick of 150 × 70 × 10 mm, and each specimen was painted according to the specifications defined in the above embodiment. The radon radiation measurement test was carried out for 72 hours in a small chamber by a continuous monitoring measurement method, and maintained a uniform temperature and humidity inside the chamber. The measured value was the average of the measured values of three experiments under the same environmental conditions. The radon blocking rate was determined using the following equation when the radon emissivity of the ground specimen was Co and the radon emissivity of each specimen was C.

Equation (Co-C) / Co × 100

As a result of the experiment, as shown in <Table 1>, wallpaper wallpaper has almost no effect on the release of radon gas in the room, and when it is coated as a paint, the radon blocking rate is 28% when titanium dioxide is not contained, whereas the idealized titanium Radon blocking rate of 33-63% was shown when contained. Therefore, titanium dioxide proved a direct connection to the blocking effect of radon radiation and optimized the content of titanium dioxide. In addition, when the acrylic / styrene copolymer emulsion resin was used properly, it showed an effect of 28-63%. Thus, it was proved that the coating material containing the polymer binder had a radon blocking effect of 48-54%. When optimized, the radon blocking rate was found to be 63% or more. This is superior to the blocking rate of 15-52% of radon blockers sold in Korea. Here, the embodiment of the present invention corresponds to the sixth.

As described above, the present invention provides a method for reducing radon indoors including a multi-use facility, thereby reducing the incidence rate of lung cancer in the public due to the effect of suppressing the emission of radon gas from the surface in structures, buildings, especially apartments and subway platforms using cement. In addition, it has the side effect of extending the life of the building due to waterproofing and antibacterial and creating a pleasant living culture.

Claims (18)

In the method of painting on the wall surface, The first step: 20-60% acrylic / styrene copolymer emulsion resin, 1-10% of the formulation comprising a film dispersant, and the remainder is mixed with water by adding 100% by weight and applying it to the wall surface (10) and; Second step: After the undercoat 10 is dried, 1-30% of the acrylic / styrene copolymer emulsion resin, 10-80% of the functional inorganic material, and water are added to the water-soluble paint mixed with 100% by weight of water on the wall surface. Middle (20) process; Step 3: After the intermediate 20 is dried, 10-50% of the acrylic / styrene copolymer emulsion resin, 1-40% of titanium dioxide, 10-50% of the functional inorganic material, and the rest of the film forming agent dispersant A top coat (30) process of applying a preparation to the midway (20) to paint a mixture of 100% by weight; Radon radiation shielding coating method characterized in that it consists essentially of blocking the radon radiation emitted from the interior of the concrete wall surface. The method of claim 1, Preparation of the first to third steps, Radon radiation barrier coating method characterized in that 1-60% of the film-forming agent is added and the rest is added to the weight ratio by adding a dispersant. The method of claim 2, In the preparation of the first to third steps, Radon radiation barrier coating method characterized in that at least one of a cryoprotectant, antibacterial agent, thickener, surfactant, antifoaming agent can be selectively added to form a preparation. The method of claim 1, The functional inorganic material of the second step and the third step, Radon radiation blocking coating method characterized in that one or more of talc, calcium carbonate, aluminum silicate, diatomaceous earth can be added to be used. The method of claim 1, The average particle diameter of the said acrylic / styrene copolymer emulsion, Radon radiation barrier coating method characterized by having a particle size of 1-500nm. The method of claim 1, The particle size of the functional inorganic material, Radon radiation shielding coating method, characterized in that it has a particle size of 1-40㎛. The method of claim 1, The undercoat 10, Radon radiation shielding coating method, characterized in that applied to a thickness of 1-100㎛. The method of claim 1, The midway 20 is, Radon radiation shielding coating method, characterized in that applied to a thickness of 20-1,000㎛. The method of claim 1, The top coat 30 is, Radon radiation shielding coating method, characterized in that applied to a thickness of 0.1-400㎛. In the coating layer painted on the wall surface, At the bottom of the wall, 20-60% of the acrylic / styrene copolymer emulsion resin, 1-10% of the preparation consisting of the film dispersant, and the remainder were mixed with water to add 100% by weight to the mixed paint applied and dried. 10; 1-30% of the acrylic / styrene copolymer emulsion resin, 10-80% of the functional inorganic material, and the remainder of the water-soluble coating material mixed with 100% by weight of water is applied to the upper surface of the lower layer 10, and the dried medium ( 20); Into the upper portion of the middle (20), a weight ratio of 10-50% of the acrylic / styrene copolymerized emulsion resin, 1-40% of titanium dioxide, 10-50% of functional inorganic materials, and the rest of the film forming agent dispersant was added. A top coat 30 coated with a blend of 100% dried; Radon radiation shielding coating layer characterized in that the layer to each other to fundamentally block the radon radiation emitted from the interior of the concrete wall surface. The method of claim 10, The preparation, Radon radiation shielding coating layer, characterized in that 1-60% of the film-forming agent and the remainder by adding a dispersant to match the weight ratio 100%. The method of claim 11, In the preparation, Radon radiation barrier coating layer characterized in that at least one of a cryoprotectant, antimicrobial agent, thickener, surfactant, antifoaming agent can be selectively added to form a preparation. The method of claim 10, The functional inorganic material, Radon radiation barrier coating layer characterized in that one or more of talc, calcium carbonate, aluminum silicate, diatomaceous earth can be added to be used. The method of claim 10, The average particle diameter of the said acrylic / styrene copolymer emulsion, Radon radiation shielding coating layer, characterized in that it has a particle size of 1-500nm. The method of claim 10, The particle size of the functional inorganic material, Radon radiation shielding coating layer, characterized in that it has a particle size of 1-40㎛. The method of claim 10, The undercoat 10, Radon radiation shielding coating layer, characterized in that applied to a thickness of 1-100㎛. The method of claim 10, The midway 20 is, Radon radiation shielding coating layer, characterized in that applied to a thickness of 20-1,000㎛. The method of claim 10, The top coat 30 is, Radon radiation shielding coating layer, characterized in that applied to a thickness of 0.1-400㎛.

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