KR20090121891A - Antibacterial +ion sol for coating building materials and preparing method of the same - Google Patents

Abstract

PURPOSE: An antibacterial cation exchange sol composition using zeolite acidic water used for coating building materials and a preparation method thereof are provided to prevent various organic compounds or volatile materials from being emitted, and to protect the human body from various bacterial by a nanosilver inorganic antimicrobial agent. CONSTITUTION: An antibacterial cation exchange sol composition using zeolite acidic water used for coating building materials comprises acidic water 100.0 parts by weight, zeolite powder 10 - 15 parts by weight of 2,000 - 2,500 mesh, nanosilver inorganic antimicrobial agent 5 - 10 parts by weight, sodium chloride 3 - 4.5 parts by weight, hydrogen peroxide 20 - 35 parts by weight, and methyl alcohol 10 - 15 parts by weight.

Description

ANTIBACTERIAL + ION SOL FOR COATING BUILDING MATERIALS AND PREPARING METHOD OF THE SAME}

The present invention relates to an antimicrobial cation exchange sol composition which can adsorb harmful substances emitted from building interior materials, which can be used to coat building interior materials, and can also have an antibacterial effect, and a method for producing the same. The composition of the present invention can prevent the emission of various organic compounds used in the preparation of interior materials when coated on building interior materials.

In order for people to live and work in buildings, interior walls, floors, and ceilings must be constructed with various finishing materials, doors, windows, partitions, etc. must be installed, and other fixed furniture or mobile furniture must be installed. In order to actually use the building, various interior materials must be constructed or installed indoors in large quantities.

Various interior materials installed or installed indoors are mainly for economic reasons, so that a plurality of synthetic resin boards or wood boards are glued together to form a multilayer structure, and the surface of the interior material formed of the multilayer structure is colored with paint or adhesive veneer Is being manufactured. Interior materials manufactured by the above-described method is widely used because of the light weight and low cost and the beautiful appearance.

However, in the step of manufacturing such interior materials, synthetic resin adhesives having excellent physical properties related to adhesion are used to bond synthetic resin boards or wooden boards in a multi-layered structure, and synthetic paints having excellent physical properties related to painting are used to color the surface of interior materials. Since it is used, various organic compounds or volatile substances included in the synthetic resin adhesives and synthetic paints are emitted, which adversely affects the health of people living or working inside the building.

Accordingly, in order to prevent or suppress the divergence of various organic compounds or volatile substances that adversely affect the health of people, various compounds have been developed that coat and coat the surface of the interior material. There is a problem that it is difficult to actually apply to the interior material because it emits harmful substances.

For example, Korean Patent Laid-Open Publication No. 2004-3528 discloses a coating composition composed of an acrylic copolymer emulsion, an aqueous urethane resin, a wax emulsion, an alkali-soluble resin, and an ultraviolet absorber.

However, such an acrylic coating composition has a problem that it is difficult to actually apply to the interior material by emitting a substance harmful to the human body in itself.

Also disclosed are aqueous coating compositions comprising a multifunctional polymeric carrier, a hydrophilic polymer, a polyfunctional aqueous colloidal metal oxide, and a multifunctional crosslinking agent.

However, such an aqueous coating composition has a problem in that an organic solvent is used to polymerize and thus emit harmful substances in a state of being coated on interior materials.

Accordingly, the present invention is manufactured using cationic acidic water, zeolite and silver nano inorganic antimicrobial agent as a main raw material, and is coated on the surface of the building interior material to form a thin film, the building interior material to prevent the emission of various organic compounds or volatiles from the interior material An object of the present invention is to provide an antimicrobial cation exchange sol composition for coating and a method of producing the same.

In order to achieve the object of the present invention described above, as an aspect of the present invention, 10 to 15 parts by weight of zeolite powder of 2000 to 2500 mesh, 5 to 10 parts by weight of silver nano inorganic antibacterial agent, sodium chloride 3 with respect to 100 parts by weight of acidic water There is provided an antimicrobial cation exchange sol composition for building interior coatings, comprising from 4.5 parts by weight to 20 parts by weight, hydrogen peroxide from 20 to 35 parts by weight, and 10 to 15 parts by weight methyl alcohol.

Moreover, as another aspect of this invention,

10 to 15 parts by weight of zeolite of 2000 to 2500 mesh, 5 to 10 parts by weight of silver nano inorganic antibacterial agent, and 3 to 4.5 parts by weight of sodium chloride are mixed and nano-pulverized to form a first composition, based on 100 parts by weight of acidic water,

Leaving the first composition to separate solids / liquid into a precipitate and a supernatant, and filtering to obtain an aqueous supernatant solution of zeolite acidic water,

To form a second composition by mixing and stirring 5 to 10 parts by weight of hydrogen peroxide and 10 to 15 parts by weight of methyl alcohol with respect to 100 parts by weight of the zeolite acidic aqueous solution,

Primary swelling by stirring the second composition at a constant temperature increase for 30 minutes from 80 ° C to 95 ° C,

A second swelling step of mixing and stirring 15 to 25 parts by weight of hydrogen peroxide with respect to 100 parts by weight of the first swollen composition, and

Quenching the secondary swelled composition to room temperature

Provided is a method for producing an antimicrobial cation exchange sol for building interior coating.

The antimicrobial cationic sol for coating coatings for building interiors of the present invention improves the health of residents by preventing the release of various organic compounds or volatile materials used in the preparation of interior materials when spraying on the surface of interior materials. It works. Furthermore, the human body can be protected from various bacteria by the antimicrobial action of the silver nano inorganic antibacterial agent included in the composition.

In addition, since the antimicrobial cationic sol for building interior coating of the present invention is manufactured using a material that is harmless to the human body, it is environmentally friendly and emissions of harmful substances such as formaldehyde from the cationic sol itself are blocked at the source.

In one embodiment of the present invention, the antimicrobial cation exchange sol composition for building interior coating is 10 to 15 parts by weight of zeolite powder of 2000 to 2500 mesh, 5 to 10 parts by weight of silver nano inorganic antibacterial agent, sodium chloride 3 with respect to 100 parts by weight of acidic water. To 4.5 parts by weight, 20 to 35 parts by weight of hydrogen peroxide, and 10 to 15 parts by weight of methyl alcohol.

Zeolite, which is a component of the antimicrobial cation exchange sol composition for building interior coating of the present invention, has a function of adsorbing harmful substances and deodorizing odor, which is caused by electrically ion-exchanging with cation suspended particles in harmful substances to cause adsorption. Zeolites have a humidity control effect in addition to excellent water purification, high adsorption and deodorization functions. In addition, the zeolite has a function of emitting far infrared rays, thereby promoting blood circulation and activating cellular activity of the human body.

In addition, inorganic silver antibacterial agent in the composition of the present invention uses a silver-based antibacterial agent composed mainly of ^{_{C 6 H 5 O 7 Ag 3}} + ( citric acid). These antimicrobials are harmless to the human body and are non-toxic and have the property of having persistent and strong antibacterial properties.

The present invention provides an antimicrobial cation exchange sol composition prepared by mixing such zeolite and silver nano inorganic antibacterial agents with acidic water. In the composition of the present invention, the zeolite and the antimicrobial agent are uniformly dispersed in the acidic water, so that the electrical action with the charged suspended particles becomes very uniform and stable, so that the adsorption and antibacterial action of the harmful substances can be effectively performed.

Hereinafter, the composition of the present invention will be described in more detail.

First, the antimicrobial cation exchange sol composition of the present invention contains zeolite powder. The zeolite powder uses an average particle size of 2000 to 2500 mesh. If the average particle size of the zeolite powder is less than 2000 mesh, the size of the zeolite powder is excessive so that the zeolite powder does not neutralize and aggregate properly in the composition, and if the particle size exceeds 2500 mesh, the neutralization of the zeolite powder is further neutralized compared to the cost of grinding the zeolite powder. No coagulation effect occurs.

Specifically, the cation exchange sol composition of the present invention contains 10 to 15 parts by weight of zeolite powder having an average particle size of 2000 to 2500 mesh with respect to 100 parts by weight of acidic water.

In the composition, when the content of the zeolite powder is less than 10 parts by weight with respect to 100 parts by weight of acidic water, the structure of the cation exchange sol of the present invention is weakened and the effect of preventing the emission of organic compounds or volatile substances is reduced, and the zeolite is reduced. If the content of the powder exceeds 15 parts by weight, the viscosity of the mixture is increased too much, which makes handling difficult.

In addition, the antimicrobial cation exchange sol composition of the present invention contains 5 to 10 parts by weight of silver nano inorganic antibacterial agent based on 100 parts by weight of acidic water.

In the composition, when the content of the silver nano antibacterial agent is less than 5 parts by weight based on 100 parts by weight of acidic water, sufficient antimicrobial activity is not provided. When the content of the silver nano antibacterial agent exceeds 10 parts by weight, the relative content of other components is lowered.

Specifically, the silver nano inorganic antimicrobial agent used in the present invention is a silver antimicrobial agent whose main component is silver citrate. The silver nano inorganic antimicrobial agent is composed of 20 to 30 parts by weight of silver citrate based on 100 parts by weight of a mixed solvent of water and ethanol. As a mixed solvent for dissolving silver citrate, a mixed solvent having a ratio of water and ethanol of 2: 3 is preferable in view of solubility. If the content of silver citrate dissolved in the mixed solvent is less than 20 parts by weight, the antimicrobial activity of the antimicrobial agent is not sufficient, and if it exceeds 30 parts by weight, silver citrate is not completely dissolved in the mixed solvent.

In addition, a surfactant may be added to further enhance the antimicrobial properties of the silver nano inorganic antimicrobial agent. As the surfactant, ABDM (alkylbenzyldimethyl ammonium chloride) showing strong bactericidal power may be used. Applicants have found that silver citrate and ABDM are electrically interacted to express stronger antimicrobial activity. Therefore, even better results can be obtained by adding the ABDM surfactant component to the silver nano inorganic antimicrobial agent.

In addition, the cation exchange sol composition of the present invention contains 3 to 4.5 parts by weight of sodium chloride based on 100 parts by weight of acidic water. Sodium chloride acts to promote neutralization of the composition.

In the composition, if the content of sodium chloride to 100 parts by weight of acidic water is less than 3 parts by weight, the zeolite powder does not neutralize and aggregate properly, and when the content of sodium chloride exceeds 4.5 parts by weight, the physical properties of the cation exchange sol of the present invention are lowered. .

Next, the cation exchange sol composition of the present invention contains 20 to 35 parts by weight and 10 to 15 parts by weight of hydrogen peroxide and methyl alcohol with respect to 100 parts by weight of acidic water, respectively. Hydrogen peroxide weakens the tissue of the zeolite particles to promote swelling of the composition, and methyl alcohol is added to adjust the concentration of the composition.

In the composition, when the content of hydrogen peroxide is less than 20 parts by weight based on 100 parts by weight of zeolite acidic aqueous solution, the acidic aqueous solution does not swell properly, and when the content of hydrogen peroxide exceeds 35 parts by weight of zeolite included in the aqueous acidic aqueous solution The physical properties of the fine particles are lowered.

In addition, when the content of methyl alcohol is less than 10 parts by weight based on 100 parts by weight of the acidic aqueous solution, the viscosity of the mixed solution becomes high and does not stir properly. When the content of methyl alcohol exceeds 15 parts by weight, excessive swelling of the composition occurs excessively. .

The cation exchange sol composition of the present invention uses acidic water as a solvent. Acidic water refers to acidic water produced by passing raw water (tap water) through an electrolytic reduction water device-after removing ions and then obtaining + ionized water. These acidic waters have bactericidal and harmful substance decomposition functions. In the present invention, by using + acidic water, it is possible to promote the uniform dissolution and dispersion of zeolite in acidic water due to interaction with the positive charge to enhance the physical properties of the composition.

As described above, the cation exchange sol for coating the building interior of the present invention consisting of zeolite powder, silver nano inorganic antibacterial agent, sodium chloride, hydrogen peroxide, methyl alcohol and acidic water does not contain various organic compounds or volatile substances which adversely affect the human body.

The cation exchange sol composition of the present invention can be used, for example, by spraying a surface of a building interior material to coat the surface of the interior material. When the cation exchange sol composition of the present invention is coated on the surface of the interior material, the charged ions in the composition and the charged ions contained in the hazardous material coming from the interior material electrically interact to cause adsorption of the harmful material by the composition. do. Therefore, the interior material coated with the composition of the present invention can be suppressed the emission of organic compounds or volatile substances harmful to the human body. In addition, due to the action of the silver nano-inorganic antimicrobial agent contained in the composition of the present invention may also exhibit a removal effect on various bacteria.

In another aspect of the present invention, a method for preparing an antimicrobial cation exchange sol composition for coating a building interior material,

10 to 15 parts by weight of zeolite of 2000 to 2500 mesh, 5 to 10 parts by weight of silver nano inorganic antibacterial agent, and 3 to 4.5 parts by weight of sodium chloride are mixed and nano-pulverized to form a first composition, based on 100 parts by weight of acidic water,

Leaving the first composition to separate solids / liquid into a precipitate and a supernatant, and filtering to obtain an aqueous supernatant solution of zeolite acidic water,

To form a second composition by mixing and stirring 5 to 10 parts by weight of hydrogen peroxide and 10 to 15 parts by weight of methyl alcohol with respect to 100 parts by weight of the zeolite acidic aqueous solution,

Primary swelling by stirring the second composition at a constant temperature increase for 30 minutes from 80 ° C to 95 ° C,

A second swelling step of mixing and stirring 15 to 25 parts by weight of hydrogen peroxide with respect to 100 parts by weight of the first swollen composition, and

Quenching the secondary swelled composition to room temperature

Is made of.

In addition, in the present invention, in the step of nano-crushing by mixing the acidic water, zeolite powder, silver nano inorganic antibacterial agent and sodium chloride, the nano-crushing cycle consisting of 5 minutes of nano grinding and 5 minutes rest period is repeated to form a composition do.

In addition, in the present invention, 15 to 25 parts by weight of hydrogen peroxide is mixed with 100 parts by weight of the primary swollen composition compound and stirred for 30 minutes to form a second swollen composition.

Figure 1 shows the procedure of the method for producing antimicrobial cation exchange sol for building interior coating according to an embodiment of the present invention.

Hereinafter, a method of manufacturing a cation exchange sol for coating a building interior according to the present invention will be described in detail with reference to the accompanying drawings.

In the first step of the present invention, the zeolite is ground to an average particle size of 2000 to 2500 mesh (step S1).

As described above, if the average particle size of the zeolite powder is less than 2000 mesh, the size of the zeolite powder is excessive, so that the zeolite powder does not neutralize properly in the composition, and if the particle size exceeds 2500 mesh, the composition is compared with the cost of grinding the zeolite powder. No more neutralizing effect occurs at.

Next, the pulverized zeolite powder, the silver nano inorganic antibacterial agent, the acidic water solvent, and sodium chloride for controlling the neutralizing cohesive force of the composition are mixed to form a mixture, and nano-pulverized to form the first composition (step S2).

Specifically, 10 to 15 parts by weight of zeolite having an average particle size of 2000 to 2500 mesh, 5 to 10 parts by weight of silver nano inorganic antibacterial agent, and 3 to 4.5 parts by weight of sodium chloride were mixed with respect to 100 parts by weight of acidic water, followed by stirring at a high speed of 7500 rpm. Thus, the coarse particles in the mixture are finely pulverized while at the same time promoting the neutralization aggregation phenomenon of the composition to form a mixture.

By the way, in the process of nano-crushing to form the first composition, if the homogenization operation is continuously performed for a long time, the viscosity of the mixture suddenly increases, and further homogenization operation becomes difficult. The resting phase is one homogenization nano grinding cycle, and the same homogenization cycle is repeated five times to form the first composition.

Next, the first composition is left to separate solids / liquid into a precipitate and a supernatant, and filtered to recover an aqueous antimicrobial zeolite acidic water solution, which is a supernatant (step S3).

Specifically, the mixture is allowed to stand for a certain period of time to solid / liquid separated into a precipitate which is a finely pulverized insoluble zeolite and a supernatant in which zeolite particles and silver nano inorganic antibacterial agents are dissolved in acidic water. The solid / liquid separated mixture is filtered as described above to recover an antimicrobial zeolite acidic aqueous solution as a supernatant.

Next, hydrogen peroxide and methyl alcohol are mixed and stirred to the recovered aqueous solution of zeolite acidic water to form a second composition (step S4).

Specifically, based on 100 parts by weight of the aqueous solution of zeolite acidic water, by mixing and stirring 5 to 10 parts by weight of hydrogen peroxide to weaken the structure of the zeolite fine particles to promote swelling and 10 to 15 parts by weight of methyl alcohol for adjusting the concentration of the aqueous solution 2 form a composition.

Next, the second composition formed by mixing the hydrogen peroxide and methyl alcohol is first swollen by stirring while raising the temperature at a constant rate (step S5).

Specifically, the composition is first preheated to 80 ° C. and stirred at a constant rate with a constant temperature rise to 95 ° C. over 30 minutes to first swell the composition. Applying the preheating temperature of the composition below 80 ° C. takes excessive time for primary swelling of the composition, and decomposing hydrogen peroxide contained in the composition when the final temperature of the composition exceeds 95 ° C. In addition, if the time for raising the composition at the above temperature is less than 30 minutes, the physical properties of the primary swelled composition are lowered, and if the time for raising the composition exceeds 30 minutes, the primary swelling of the composition does not proceed anymore. .

Next, a predetermined amount of hydrogen peroxide is again mixed with the primary swelled composition as described above, and stirred at a constant rate to swell second to form a cationic sol (step S6).

Specifically, with respect to 100 parts by weight of the primary swelling composition, 15 to 25 parts by weight of hydrogen peroxide is mixed, and the second swelling by stirring for 30 minutes while continuing to maintain the final temperature of the first swelling 95 ° C side surface of the cationic sol Preferred at

In addition, when the content of hydrogen peroxide is less than 15 parts by weight based on 100 parts by weight of the primary swelled composition, the cationic sol may be cured. On the contrary, when the content of hydrogen peroxide exceeds 25 parts by weight, the possibility of dissociation of the cationic sol may occur.

Finally, the secondary swelled cationic sol as described above is rapidly cooled to room temperature to prepare a cation exchange sol for building interior coating of the present invention (step S7).

As described above, the antimicrobial cation exchange sol for building interior coating prepared by the method of the present invention does not include various organic compounds or volatile substances which adversely affect the human body.

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

However, the following Examples are for illustrating the present invention, but are not limited thereto.

EXAMPLE

A. Preparation of Zeolite Acidic Water Antimicrobial Cation Exchange Sol

1. 1 kg of zeolite was ground to a powder of 2000 mesh using a ball mill.

2. + acidic water was prepared using an electrolytic reduction water group. The electrolytic reduction water group used is the HU-50 model of OSG Corporation of Japan, and the water pressure ranges from 0.07-0.35 mpa.

3. 50 g of silver citric acid was dissolved in a mixed solvent of 80 g of water and 120 g of ethanol to form a liquid silver nano inorganic antibacterial agent.

4. The above obtained 5 L of acidic water, 0.6 kg of zeolite powder, 320 g of silver nano inorganic antibacterial agent and 0.2 kg of reagent grade sodium chloride were added to a nano grinding reactor, and rotated at high speed at 7500 rpm to nano crush the remaining coarse particles to uniformly mixed agent. 1 composition was formed. At this time, in order to prevent a sharp increase in viscosity, a nano grinding cycle consisting of 5 minutes of nano grinding and 5 minutes of rest period was performed. The nano crushing reactor used is a model of HMZ-70DN Homogenizer from Poonglim Co., Ltd. in Korea.

5. The first composition formed as described above was allowed to stand for 60 minutes to separate solid / liquid into a precipitate which is a ground product of zeolite and a supernatant solution of zeolite acidic water solution in which zeolite fine particles and an antimicrobial agent were dissolved in acidic water.

6. The solid / liquid separated mixture was filtered to separate the precipitate, and the aqueous supernatant solution of zeolite acidic water was recovered.

7. 175 g of hydrogen peroxide and 300 g of methyl alcohol were mixed with 2.5 L of the recovered zeolite acidic aqueous solution, and stirred at 550-650 rpm for 60 minutes to form a second composition.

8. The second composition was placed in a reactor preheated to 80 ° C. and stirred at 550 rpm while constantly warming up to 95 ° C. over 30 minutes to primary swell the second composition.

9. A sol was formed by mixing 400 g of hydrogen peroxide with 2 kg of the primary swelled composition, stirring the mixture at 550 rpm for 30 minutes while maintaining the final temperature of the primary swelling at 95 ° C.

10. The cation exchange sol for building interior coating of the present invention was prepared by floating the reactor containing the secondary swelled sol on the surface of a large-capacity water bath containing 23 ° C. and cooling it to room temperature.

B. Hazardous Substance Inhibition Test of Antimicrobial Cationic Sol

The antimicrobial cationic sol for building interior material coating prepared in A was sprayed onto the surface of the door prepared by adhering the synthetic resin plate with an adhesive to form a thin film of cationic sol on the surface of the door.

Formaldehyde (HCHO) was formed before and after forming a thin film of cationic sol on the surface of the door using Japan COSMOS Corporation XP-309B (Japan Ministry of Health, Labor and Welfare designated volatile organic matter measuring equipment). ) The amount of release was measured and compared. As a result of the measurement, the amount of formaldehyde (HCHO) before forming a thin film of cationic sol was 1.19 ppm, whereas no formaldehyde (HCHO) was detected after forming a thin film of cationic sol (HCHO: WHO standard value). 0.08 ppm or less, Japan Ministry of Health, Labor and Welfare standard value 0.05 ppm or less).

C. Deodorization Test of Antimicrobial Cationic Sol of the Invention

In this test, the antibacterial cationic sol prepared in A was used for deodorization test for ammonia, one of the four odor causing substances. The results are shown in the following Table 1. As can be seen from the table, the antimicrobial cationic sol of the present invention was also excellent in deodorization rate.

division Ammonia Concentration (ppm) Deodorization rate (%) 30 minutes 120 45.5 60 minutes 92 55.4 90 minutes 69 85.0 120 minutes 42 98.9 Determination rate of sample concentration (%) using KICM-FIR-1085

D. Antimicrobial Testing of Antimicrobial Cationic Sols of the Invention

In this test, using the antimicrobial cationic sol prepared in A was carried out an antimicrobial test against the common Escherichia coli (Escherichia coli ATCC 25922). The results are shown in the following Table 2. As can be seen from the table, the antimicrobial cationic sol of the present invention was also excellent in antimicrobial activity.

Test Items Test result Test Methods Initial concentration (CFU / 409) After 24 hours (CFU / 409) Bacterial clearance rate (%) Antibacterial test for Escherichia coli Blank 415 2894 - KICM-FIR-1002 Compositions of the Invention 415 One 99.8

As can be seen in Table 3, the antimicrobial deodorant adsorbent composition according to the present invention showed a very good antimicrobial activity.

As described above, when the antimicrobial cation exchange sol for building interior coating of the present invention is coated on the surface of the interior material to form a thin film, it is possible to completely prevent the release of various organic compounds or volatile substances from the interior material, and also possible to deodorize odors. In addition, bacteria can be removed.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. It will be appreciated.

Figure 1 shows the procedure of the method for producing antimicrobial cation exchange sol for building interior coating according to an embodiment of the present invention.

Claims (8)

10 to 15 parts by weight of 2000 to 2500 mesh zeolite powder, 5 to 10 parts by weight of silver nano inorganic antibacterial agent, 3 to 4.5 parts by weight of sodium chloride, 20 to 35 parts by weight of hydrogen peroxide, and 10 to 15 parts of methyl alcohol, based on 100 parts by weight of acidic water. An antimicrobial cation exchange sol composition for coating a building interior comprising a weight part. The antimicrobial cation exchange sol composition according to claim 1, wherein the silver nano inorganic antimicrobial agent is a liquid antimicrobial agent mainly composed of silver citrate. The antimicrobial cation exchange sol composition according to claim 1 or 2, wherein the silver nano inorganic antimicrobial agent further comprises a surfactant. 4. The antimicrobial cation exchange sol composition according to claim 3, wherein the surfactant is alkylbenzyldimethyl ammonium chloride. 10 to 15 parts by weight of zeolite of 2000 to 2500 mesh, 5 to 10 parts by weight of silver nano inorganic antibacterial agent, and 3 to 4.5 parts by weight of sodium chloride are mixed and nano-pulverized to form a first composition, based on 100 parts by weight of acidic water, Leaving the first composition to separate solids / liquid into a precipitate and a supernatant, and filtering to obtain an aqueous solution of zeolite acidic water as a supernatant; To form a second composition by mixing and stirring 5 to 10 parts by weight of hydrogen peroxide and 5 to 10 parts by weight of methyl alcohol with respect to 100 parts by weight of the zeolite acidic aqueous solution, Primary swelling by stirring the second composition at a constant temperature increase for 30 minutes from 80 ° C to 95 ° C, A second swelling step of mixing and stirring 15 to 25 parts by weight of hydrogen peroxide with respect to 100 parts by weight of the first swollen composition, and Quenching the secondary swelled composition to room temperature A method for producing an antimicrobial cation exchange sol for building interior coatings according to claim 1. The method according to claim 5, wherein the nano grinding step of the acidic water, zeolite powder, silver nano inorganic antimicrobial agent and sodium chloride mixture is performed using a nano grinding cycle consisting of 5 minutes of nano grinding and 5 minutes of rest. 7. The method of claim 5 or 6, wherein the nano grinding cycle is performed five times. 6. The method according to claim 5, wherein the second swelling step is performed by stirring at 95 DEG C for 30 minutes.

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