KR100977707B1 - The paint for radon radiation - Google Patents

Abstract

The present invention relates to a coating layer for coating the concrete floor surface, in particular, while painting in a layer of lower, medium, and top, radon which is released from the concrete wall by inserting appropriately high density and dense particles and components in each layer The present invention relates to a paint for preventing radon emission, which fundamentally blocks radioactivity.

Therefore, the present invention, as a method of reducing radon indoors including a multi-use facility to lower the incidence of lung cancer in the public according to the effect of suppressing the emission of radon gas from the surface in structures, buildings, especially apartments, subway platform, etc. using cement It has side effects such as extending the life of the building due to waterproofing and antibacterial and creating a pleasant living culture.

Epoxy resin, urea resin, antifoaming agent, hardener, functional inorganic material

Description

Paint for preventing radon emissions {The paint for radon radiation}

The present invention relates to a coating layer for coating the concrete floor surface, in particular, while painting in a layer of lower, medium, and top, radon which is released from the concrete wall by inserting appropriately high density and dense particles and components in each layer The present invention relates to a paint for preventing radon emission, which fundamentally blocks radioactivity.

In general, radon (Re-222) is a substance produced by the collapse of about 70 kinds of natural radioactive materials 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 based on the “Air Quality Control Act for Multi-Use Facilities, etc.”. The Korea Institute of Nuclear Safety (KINS) determined that indoor air was As a result of measuring radon gas concentrations, 3.4% exceeded the indoor air quality standard 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 emission rate is required only when the radon concentration is measured to be high.

The method of reducing radon indoors currently used in Korea includes a method of blocking or frequently venting a gap as a sealing agent to prevent radon gas from entering 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 and ceilings in addition to gaps in buildings, radon gas release rate (patent registration no. 10-454753) is added to concrete to suppress radon emission rate even if the method of suppressing the release rate of radon is used. The blocking effect is not more than 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 relates to a coating layer for coating the concrete floor surface, while forming a layer in the lower, medium, and top layer, the radon radioactive radiation emitted from the concrete wall by injecting appropriately high density and dense particles and components in each layer It is intended to provide a paint to prevent the release of radon which is fundamentally blocked.

The present invention is a paint for preventing the release of radon, 50-80% of the epoxy resin of the binder, 1-40% of the urea resin and 1-30% of the preparation of the surfactant, the remainder in the weight ratio of 100% ; 30 to 70% of epoxy resin, 1 to 30% of polyamide resin, and 1 to 30% of antifoaming agent, and 100% by weight of the curing agent to which the solvent was added; It is a paint for preventing the release of radon, which is the first coating paint, wherein the main material and the curing agent are mixed at a weight ratio of 3: 1.

In the paint for preventing the release of radon, 20-30% of the epoxy resin as a binder, 1-10% of titanium dioxide as the pigment, 20-60% of the functional inorganic material, 1-30% of a dispersant and a surfactant are mixed. At the weight ratio 100%, the rest is the main ingredient to which the additive is added; Hardener which mixed 80-99% of polyamide resins and 1-20% of hardening accelerators as a binder; It is a paint for preventing the release of radon, which is a second coating paint in which a main ingredient and a curing agent are mixed at a weight ratio of 8: 1.

In the paint for preventing the release of radon, 30-80% of epoxy resin, 1-20% of urea resin, 10-30% of titanium dioxide, 1-10% of functional inorganic material, dispersant and surfactant are used as a pigment. 1-30% of the prepared preparations, the remainder being 100% by weight in the solvent; Hardener which mixed 80-99% of polyamide resins and 1-20% of hardening accelerators as a binder; It is a paint for preventing the release of radon, which is a third coating paint in which the main ingredient and the curing agent are mixed at a weight ratio of 3: 1.

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.

The present invention relates to a paint to be painted on the bottom surface.

Therefore, look at the composition of the paint for the painting in detail.

The present invention is a paint for preventing the release of radon, 50-80% of the epoxy resin of the binder, 1-40% of the urea resin and 1-30% of the preparation of the surfactant, the weight ratio of 100% in the rest of the main subject, The binder is a 30-70% epoxy resin, 1-30% polyamide resin, and 1-30% of an antifoaming agent, and a hardener in which a solvent is added at a weight ratio of 100%. Thus, that is, to prepare a first coating paint mixed with the main agent and the curing agent in a 3: 1 weight ratio. An important point here is that the first paint of the present invention has an effect of blocking the radiation of radon harmful to the human body when it is applied to the bottom surface. Of course, the first coating paint of the present invention is organically combined with all the components to achieve this object.

Epoxy resin used in the first coating paint of the present invention is a material that serves to firmly adhere to the bottom surface as a binder. Recently, it is the most used material as a binder and has a strong fastening force and physical stability, so that the paint can have a strong durability after the paint is painted. In addition, urea resin as a binder added and attached may have a harder network structure when combined with the epoxy resin and used as a binder, and serves as a binder having high wear resistance and deterioration resistance. Therefore, in this invention, such urea resin is added.

Meanwhile, a surfactant is added to the first coating paint of the present invention as a preparation, and the surfactant plays a role of allowing each component to be attached to each other to be well mixed or compounded. In fact, there are so many kinds of surfactants on the market, and because of the generalized state, the physical properties and limitations are refrained. In the present invention, a solvent is finally added in the preparation of the subject matter, but water cannot be used as the solvent in the present invention. Thus solvents are used, in particular ethyl acetate is mainly used. As such, the present invention first produces the main material as a main paint and then prepares a curing agent. In fact, the epoxy and urea resins require special curing agents. In other words, since the resin alone is difficult to form a film, a curing agent must be added to function as a complete binder.

Then, the curing agent of the first coating paint of the present invention will be described in detail. The curing agent used in the present invention uses an epoxy resin as a binder and a polyamide resin. And it is prepared by adding a defoamer which is a preparation and administering a solvent. Here, the polyamide resin will be described later, in the case of the antifoaming agent serves to remove the fine bubbles that may be generated when the subject and the curing agent is mixed. If bubbles are generated, the paint work is overwhelmed, the surface is not smooth, and the effect of suppressing radon radiation is lowered.

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, the binder is generally added in order to make the bonding between the components introduced into the paint more robust and to improve its durability. 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 added and used depending on the purpose of use, such as an element introduced for the purpose of waterproofing or an element introduced for fire resistance. 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, and by adjusting the viscosity it is possible to control the phenomenon that the paint is applied in agglomeration without flowing down in accordance with the situation of the bottom surface. 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.

In any event, the present invention thus produces a first coating paint as described above, but the present invention is not limited to this paint. In fact, in order to suppress radon radiation, it is necessary to apply three layers on the bottom surface to obtain an optimum effect. Therefore, the present invention proposes three paints. Of course, the paints thus prepared are applied to the top, middle and bottom, respectively, to produce an optimum effect of suppressing radon emission.

In the paint for preventing the release of radon, the second coating paint proposed by the present invention comprises 20-60% of an epoxy resin as a binder, 1-10% of titanium dioxide as a pigment, 20-60% of a functional inorganic material, a dispersant, and a surfactant. In the mixed preparation 1-30%, there is a main ingredient in which silicon is added in the remainder at a weight ratio of 100%, and there is a curing agent in which 80-99% of polyamide resin and 1-20% of a curing accelerator are mixed as a binder. Therefore, to prepare a second coating paint mixed with the main material and the curing agent in a weight ratio of 8: 1. The proposed second paint has the same purpose as the above-described first paint, but its components are different. Therefore, they can be organically combined to obtain the best radon emission prevention effect.

In addition, the third coating paint proposed in the present invention is 30-80% epoxy resin, 1-20% urea resin and 10-30% titanium dioxide as a pigment and a functional inorganic material 1- 10% to 1-30% of a mixture of a dispersant and a surfactant, and a weight ratio of 100% to a solvent is added. The hardener is a mixture of 80-99% polyamide resin and 1-20% of a curing accelerator as a binder. have. Thus, that is, the third coating paint is mixed in a 3: 1 weight ratio of the main agent and the curing agent.

Then, the physical properties of the above-described components will be described as a whole. The titanium dioxide and the functional inorganic material serve as a film forming agent and a dispersing agent as a pigment. However, although the titanium dioxide and the functional inorganic material are also classified as pigments of the same class, they are specifically classified and described in the present invention, which is different from the conventional paints in which the characteristics of the present invention fundamentally block the emission of radon radiation. That's because it works.

First, the water-soluble epoxy resin and polyamide, which are binders used in the coating method, will be described. In the case of the binder, the binder also has a waterproof effect and has a high molecular weight and a dense bonding structure, thereby providing high durability. Of course, the bonding strength is also excellent, it is widely used as a binder of the paint. Other uses include attachments to adhesives.

And surfactant and dispersant which are preparations used by this invention are put into the paint of this invention, and take unique functionality. That is, the surfactant serves to mix and mix well with other components and general additives in principle. However, the surfactant has the effect of waterproofing and moisture proofing, thereby causing the penetration of moisture that may occur on the painted wall. It is used to prevent the disintegration or erosion of the paint layer and to increase the durability of the paint. 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 necessarily 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. But they are not all components that can be fused to each other physically or chemically. Concerns about these 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, and uses the inorganic material having a dense particle structure among these minerals to prevent the phenomenon of radon radiation penetrating through the body. 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, thereby preventing the release of radon radiation by inclusion in the second and third paints.

In addition, in general preparation, one or more of a dispersing agent, an antibacterial agent, a thickening agent, a leveling agent, a color separation inhibitor, 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, at least one of a color separation inhibitor, a thickener, an antifoaming agent, and the like, in addition to the dispersant and the surfactant, which are the basic preparations, are added.

Wherein the thickener is added to increase the paint 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 bottom surface to be painted. The reason is that it is put in order 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 curing accelerator is a slow curing speed of the paint in the winter when the temperature is lowered, the curing accelerator is added to solve this problem.

In addition, the functional inorganic material used in the present invention may be used by adding one or more of talc, calcium carbonate, aluminum silicate, diatomaceous earth. All inorganic materials used in the present invention are added to block the release of radon. Therefore, the talc, calcium carbonate, aluminium 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 30-65%, talc 30-65%, 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. Lastly, the silicone, which is an additive, is a substance that improves the coating film formation of the paint. That is, durability is improved by forming a film.

In the present invention, the first coating paint may be applied to any one of the upper, middle, and lower layers 30, 20, and 10 of the paint layer on the wall; The second coating paint may be applied to any one of the upper, middle, and lower layers 30, 20, and 10 of the wall paint layer; The third coating paint may be applied to any one of the upper, middle, and lower layers 30, 20, and 10 of the paint layer on the wall. That is, the first, second, and third paints are selectively adopted for the upper, middle, and lower paints, respectively. The reason for painting in multiple layers is to minimize the release of radon. Of course, in the present invention, the experimental data for the embodiment in which the first coating paint is applied to the undercoat, the second coating paint to the midway, and the third coating paint to the top coat is shown below. The reason is that the most optimal radon release inhibitory effect was obtained in the coating layer of this embodiment.

Hereinafter, the present invention will be described in more detail by way of examples.

Table 1 Radon Block Rate Experiment Results

One 2 3 4 5 Background ○ Hado (1st paint) ○ ○ Midway (2nd paint) ○ ○ ○ ○ Hado (3rd paint) ○ ○ ○ Radon Radiation (pCi / m3h) 34.8 2.8 1.66 1.71 0.73 Radon blocking rate (%) 0 88.8 93.3 95.1 97.9 Film thickness 0 600 660 710 3150

The ground specimen size used in the experiment of the present invention was a cement brick of 150 × 70 × 10 mm, and each test specimen was coated 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 above experiment, as shown in Table 1, there is no effect on suppression of the release of radon gas from the ground specimen (typical wall surface) (radon radiation amount 34.8), and the radon radiation amount is 1.71 when the coating is performed using only the bottom coat. And less than 0.73. Of course, only the middle and top coats were also shown to be 1.66, so that a higher radiation dose suppression effect was obtained than that of one coating layer, and a thick coating of the coating layer also helped to enhance the effect.

Of course, the three layers, namely the paint layer painted with the top, middle and bottom, showed the blocking rate of the radon radiation rate of 95.1 and 97.9%, thus blocking almost all of the radon.

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

Claims (6)

In paint to prevent the release of radon, 20-60% epoxy resin as a binder, 1-10% of titanium dioxide as a pigment, As mineral inorganic material, calcium carbonate 30 ~ 65%, talc 30 ~ 65%, aluminum silicate 1 ~ 10%, the rest 20 ~ 60% mineral inorganic material mixed with diatomaceous earth,  1-30% of the formulation comprising a dispersant and a surfactant mixed with silicon in the balance of 100% by weight; Hardener which mixed 80-99% of polyamide resins and 1-20% of hardening accelerators as a binder; A paint for preventing the release of radon, characterized in that the second coating paint mixed at a weight ratio of 8: 1 with the main agent and the curing agent. In paint to prevent the release of radon, 30-80% epoxy resin as a binder, 1-20% of urea resin, 10-30% of titanium dioxide as a pigment, As a mineral inorganic material, calcium carbonate 30-65%, talc 30-65%, aluminum silicate 1-10%, the rest 1-10% mineral inorganic material mixed with diatomaceous earth, To the preparation 1-30% which mixed the dispersing agent and surfactant, the remainder was the solvent-injected at the weight ratio 100%; Hardener which mixed 80-99% of polyamide resins and 1-20% of hardening accelerators as a binder; The paint for preventing the release of radon, characterized in that the third coating paint mixed with the main body and the curing agent in a weight ratio of 3: 1. The method of claim 1, The second coating paint, Paint for preventing radon emission, characterized in that it can be applied to any one of the top, middle, bottom (30, 20, 10) of the paint layer of the bottom surface. The method of claim 2, The third coating paint, Paint for preventing radon emission, characterized in that it can be applied to any one of the top, middle, bottom (30, 20, 10) of the paint layer of the bottom surface. The method according to claim 3 or 4, As a coat of paint to prevent the release of radon, 50-80% of the binder resin, 1-40% of the urea resin and 1-30% of the preparation of the surfactant, and the remainder in the weight ratio of 100%; 30 to 70% of epoxy resin, 1 to 30% of polyamide resin, and 1 to 30% of antifoaming agent, and 100% by weight of the curing agent to which the solvent was added; The paint for radon release, characterized in that it further comprises a first coating paint mixed with the main body and the curing agent in a weight ratio of 3: 1. delete

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