KR20230139377A - Antibacterial tile grout composition having non-yellowing polyaspartic urea - Google Patents

Abstract

The non-yellowing polyaspartic urea antibacterial tile joint repair composition is polyaspartic urea and includes a main part (A) containing 70 to 90% by weight of aliphatic isocyanate and 10 to 30% by weight of alkoxysilane-modified isocyanate; And 70-95% by weight of aspartic amine, 3-10% by weight of pigment or pearl to change the color of the resulting joint to the desired color, 0.1-0.5% by weight of anti-foaming agent, 0.1-0.5% by weight of smoothness imparting agent, and coupling. Containing 1 to 10% by weight of additives including 0.3 to 2.0% by weight of agent, 0.1 to 2.0% by weight of metal antibacterial agent to impart antibacterial properties, 0.2 to 1.0% by weight of ultraviolet stabilizer or antioxidant, and 0.1 to 4.0% by weight of flow regulator. Includes a hardener portion (B).

Description

Antibacterial tile grout composition having non-yellowing polyaspartic urea}

The present invention relates to a joint repair composition for tiles installed in kitchens, restrooms, bathrooms, verandas, washrooms, lobbies, etc. of buildings. More specifically, it relates to a grout repair composition for tiles that has antibacterial properties against various types of bacteria, has excellent abrasion resistance and adhesion, and can be hand-worked. It relates to a yellowing polyaspartic urea antibacterial grout composition.

Tiles that cover the surfaces of floors and walls of buildings are easy to clean and have an interior design effect, so they are widely used as finishing materials for kitchens, restrooms, bathrooms, verandas, washrooms, lobbies, etc. in buildings. However, tiles used in bathrooms or verandas that use a lot of water, lobbies that have a lot of contact with the outside, etc. are highly durable against various contaminants, so they are resistant to contamination even over a long period of time and are easy to clean. However, the joints between the tiles are cement-based. When constructing with joints, water stains may form and contamination problems due to mold and bacteria may occur, making it environmentally unhygienic. In addition, there is a problem that such water stains, mold, etc. are not easily removed.

White cement, which is most commonly used as a joint repair agent, is a porous material that is easily penetrated by contaminants, and after penetration, contaminants in the pores are almost impossible to remove. As a solution to this contamination, a method has been proposed to reduce the occurrence of mold or scale by adding water-repellent ingredients such as silicone and adding anti-fungal agents. However, the addition of silicone or anti-fungal agents is used as a repair agent for joints, tiles and It may cause the adhesion of concrete to deteriorate and have a negative effect on durability. There is a need to develop products that have antibacterial properties without these problems.

Recently, epoxy type joints are being widely used to overcome the problems of joints using white cement. Patent No. 10-0934561 is a repair agent for tile joints using a water-based epoxy system. There is a problem in that the adhesion to the tiles decreases when exposed to water for a long time after installing the tile joint, and in winter, because it is a water-based product, construction can be done at film temperature. It does not work, and the curing time is long, which is a problem.

To overcome the shortcomings of water-based epoxy, non-solvent epoxy joint repair agents are currently widely used. However, in the case of epoxy cured products, although aliphatic amine-based hardeners are used to prevent yellowing due to long-term exposure such as sunlight exposure, bisphenol, which has a fundamental aromatic structure of the epoxy structure, cannot be excluded, so yellowing is a problem from a long-term perspective. has a lot of In addition, when applying an epoxy joint repair agent, there is a problem that a brush phenomenon occurs in which the epoxy resin turns white due to reaction with carbon dioxide or moisture in the atmosphere. In addition, in cold weather such as winter, the initial curing speed is slow, water whitening resistance deteriorates, and complete curing is delayed, so the use of epoxy as a joint repair agent is avoided in winter.

Patent No. 10-1242642 is a patent for a joint composition using an epoxy-modified hybrid polyurethane prepolymer resin and an alicyclic-modified amine, which has a fast curing speed and excellent initial water resistance and chemical resistance. It contains both a urethane group and an epoxy group in the molecule, making it mechanically resistant. It has been introduced as an epoxy grout with improved chemical properties and no discoloration as it is non-yellowing. However, in the case of the cycloaliphatic amine used in the above patent, bisphenol F-type epoxy resin with an aromatic structure undergoes an addition reaction with an aliphatic amine. Because it uses an alicyclic modified amine, it has a fragile structure that inevitably causes yellowing.

Patent application 2012-0158492 is a patent that proposes a method using polyurea to improve the yellowing and whitening phenomenon of epoxy as a repair material for tile joints, and includes general aliphatic polyamines, modified aliphatic polyamines, and aromatic amines used as curing agents for polyurea. Although it was mentioned to use one selected from the group consisting of, the above-mentioned amines used in general polyurea systems have the problem of having to use a spray device during field work due to their rapid reactivity with the isocyanate of the main part, which hardens within a few seconds. , it is difficult to use it for general tile joint repair work.

Patent No. 10-1736583 is a patent that proposes a non-yellowing polyaspartic urea antibacterial joint composition using aspartic amine. It introduces aspartic amine with adjusted molecular weight and functional group as a reaction target with polyurea to speed up the chemical reaction. It is mentioned that it is possible to obtain non-yellowing polyaspartic urea that does not change color even when used for a long time, but the product is not antibacterial and mold growth is pointed out as a problem when exposed to moisture for a long time.

As a result of checking various previous literature, it can be seen that there is a need to develop technology for a tile joint composition that maintains the same adhesive strength as existing products, does not yellow even when used for a long time, and has antibacterial properties due to the presence of antibacterial agents in the resin.

Accordingly, in consideration of the above problems, the present inventor came up with the invention of a non-yellowing polyaspartic urea antibacterial joint composition that has antibacterial properties as a basis, has excellent wear resistance and adhesion, and can be worked by hand.

Therefore, the purpose of the present invention is to provide a non-yellowing polyaspartic urea antibacterial joint composition containing aliphatic isocyanate and aspartic amine as a basic skeleton and has excellent handwork, adhesion, durability, and antibacterial properties.

In order to achieve the above object of the present invention, a non-yellowing polyaspartic urea antibacterial joint composition with excellent handability, adhesion, durability, and antibacterial properties, polyaspartic urea is 70 to 90 weight of aliphatic isocyanate having the structure of formula 1 below. % and 10 to 30% by weight of an alkoxysilane-modified isocyanate having the structure of Formula 3 obtained by reacting an aliphatic isocyanate having the structure of Formula 1 below and an alkoxysilane of Formula 2 below (A); And 70 to 95% by weight of aspartic amine having the structure of formula 4 below, 3 to 10% by weight of pigment or pearl for forming the desired color of the resulting joint, 0.1 to 0.5% by weight of antifoam, and 0.1% by weight of smoothness imparting agent. Additive 1 containing ~0.5% by weight, 0.3~2.0% by weight of coupling agent, 0.1~2.0% by weight of metal antibacterial agent to impart antibacterial properties, 0.2~1.0% by weight of ultraviolet stabilizer or antioxidant, and 0.1~4.0% by weight of flow regulator. It consists of a hardener part (B) containing ~10% by weight, and the main part (A) and the hardener part (B) are mixed at 100 to 180% by weight of the hardener part (B) with respect to 100% by weight of the main part (A). It is characterized by one thing.

Formula 1

Formula 2

(In Formula 2, R ₁ and R ₂ independently represent a straight-chain or branched alkyl group having 1 to 10 carbon atoms, or have the same meaning as R 3 , or R ₃ is a straight _- chain or branched alkyl group having 1 to 8 carbon atoms. Represents _{a side chain alkoxy} group _{, and} It is a straight-chain, branched-chain, aliphatic or aromatic hydrocarbon having 1 to 10 carbon atoms substituted by , and m and n are integers of 1 to 8.)

Formula 3

Formula 4

(At this time, Y = , , It is one of the following, or a mixture of two or more.)

The non-yellowing polyaspartic urea antibacterial joint composition of the present invention simultaneously satisfies the water resistance, abrasion resistance, and chemical resistance of conventionally used epoxy and polyurea, and is composed of aliphatic isocyanate and aliphatic amine with excellent adhesion, and is a metal with antibacterial properties. It includes, unlike conventional epoxy or polyurea, an aliphatic material is used in both the main part (A) and the hardener part (B), and the hardener part (B) contains an antibacterial agent. As a result, yellowing rarely occurs, and color, texture, and gloss are further improved due to its aliphatic nature.

In addition, the alkoxysilane-modified isocyanate obtained by reacting aliphatic isocyanate and alkoxysilane used in the present invention plays a role in improving adhesion to concrete and tiles, has antibacterial properties by containing a metal salt with antibacterial properties, and is superior to existing polyurea. Unlike other methods, manual work is possible by using aspartic amine as a hardener.

Hereinafter, the present invention will be described in detail.

The non-yellowing polyaspartic urea antibacterial joint composition according to an embodiment of the present invention is a mixture of a main part (A) containing isocyanate and a hardener part (B) containing aspartic amine. The mixture ratio of the main part (A) and the hardener (B) may vary depending on the specific ingredients, usage mode, and working conditions. For example, the hardener part (B) is 100 to 180% by weight for 100% by weight of the main part (A). It can be used by mixing weight percent.

The main part (A) of the present invention is an alkoxysilane-modified isocyanate obtained by reacting aliphatic isocyanate with an alkoxysilane.

It consists of 10 to 30% by weight and 70 to 90% by weight of aliphatic isocyanate.

First, the alkoxysilane-modified isocyanate obtained by reacting aliphatic isocyanate and alkoxysilane used in the main part (A) of the present invention will be described.

Alkoxysilane-modified isocyanate of Formula 3 can be obtained by reacting hexamethylene-1,6-diisocyanate homopolymer having the structure of Formula 1 with an alkoxy silane of Formula 2.

When synthesizing the alkoxysilane-modified isocyanate, the reaction temperature is about 60 to 90 degrees Celsius, and the reaction time is about 2 to 5 hours.

In the synthesis of the alkoxysilane-modified isocyanate, the content of the alkoxysilane is 27 to 33 equivalent% based on 100 equivalent% of hexamethylene-1,6-diisocyanate homopolymer.

The alkoxysilane used in the synthesis of the alkoxysilane-modified isocyanate is represented by the following formula (2).

Formula 2

(In Formula 2, R ₁ and R ₂ independently represent a straight-chain or branched alkyl group having 1 to 10 carbon atoms, or have the same meaning as R 3 , or R ₃ is a straight _- chain or branched alkyl group having 1 to 8 carbon atoms. Represents _{a side chain alkoxy} group _{, and} It is a straight-chain, branched-chain, aliphatic or aromatic hydrocarbon having 1 to 10 carbon atoms substituted by , and m and n are integers of 1 to 8.)

The alkoxysilane is, for example, N-methyl-3-aminopropyltrimethoxysilane, N-ethyl-3-aminopropyltrimethoxysilane, N-ethyl-3-aminopropyldiethoxymethylsilane, N-ethyl- 3-Aminopropyltriethoxysilane, N-ethyl-3-aminopropylmethyldimethoxysilane, N-butyl-3-aminopropyltrimethoxysilane, 3-(N-methyl-2-amino-1-methyl-1 -Ethoxy)-propyltrimethoxysilane, N-ethyl-4amino-3,3-dimethylbutylmethoxysilane, N-ethyl-4-amino-3,3-dimethylbutyltrimethoxysilane, 3-mer Captopropylsilane. N-cyclohexyl-3-aminomethylpropyldimethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane, N-anilinomethyltrimethoxysilane, etc. are mentioned. The alkoxysilanes can be used alone or in combination.

The aliphatic isocyanate is a hexamethylene-1,6-diisocyanate homopolymer, and HDT, DESMODURE N3300, DURANATE TPA-100, HI-100, and WANNATE HT-100 (above product names) can be used.

The alkoxysilane-modified isocyanate is preferably contained in an amount of 10 to 30% by weight based on the weight% of the main part (A). If the alkoxysilane-modified isocyanate content exceeds 30% by weight, cracking of the resin may occur after application of the joint, and if it is used in less than 10% by weight, the effects of increasing adhesion, water resistance, and weather resistance are reduced.

The hardener part (B) includes aspartic amine, pigment or pearl, antifoamer, smoothness imparting agent, coupling agent, metal antibacterial agent, ultraviolet stabilizer or antioxidant, and flow regulator.

The above aspartic amine is represented by Chemical Formula 4.

Formula 4

(At this time, Y = , , It is one of the following, or a mixture of two or more.)

The aspartic amine controls the pot life during construction of the polyaspartic urea antibacterial joint composition and improves the hardness of the coating film. The content of the aspartic amine is preferably 70 to 95% by weight of the total weight of the hardener part (B), and if used in less than 70% by weight, tensile strength and hardness may decrease. For example, DESMOPHEN NH-1220, NH-1420, and NH-1520 (trade names above) may be used as the aspartic amine.

As the pigment or pearl, effect pigments using ceramic powder, metallic glitter powder, ocher powder, synthetic mica pearl, glass pearl, etc. as a base material can be used to make the aesthetics beautiful and gorgeous. Color pigments include white, gold, Available in silver, red, blue, green, black, gray, orange, blue, etc., you can select the desired color pigment and use metallic glitter powder, synthetic mica pearl, glass pearl, etc. to create a sparkling effect. use. For example, White KR-21 (above product name) can be used as metallic glitter powder.

The antifoaming agent imparts a defoaming function to the polyaspartic urea antibacterial grout composition. The antifoaming agent content is preferably 0.1 to 0.5% by weight of the total weight of the curing agent portion (B). For example, BYK-054, BYK-066N, BYK-535, BYK-2020, EFKA-2290 (above product names), etc. may be used as the antifoaming agent.

The smoothness imparting agent (leveling agent) increases the flatness of the polyaspartic urea antibacterial grout film. The smoothness imparting agent content is preferably 0.1 to 0.5% by weight of the total weight of the hardener portion (B). For example, BYK-306, BYK-320, BYK-333, EFKA ATF-2 (above product names), etc. may be used as the smoothness imparting agent.

The coupling agent serves to enhance adhesion by coupling with the alkoxysilane-modified isocyanate of the main part (A). The content of the coupling agent is preferably 0.3 to 2.0% by weight of the total weight of the hardener part (B). For example, Z-6300, Z-6070, A-151, A-171 (above product names), etc. may be used as the coupling agent.

The metal antibacterial agent,

It contains one or more metal atoms among Ag, Cu, and Zn and a metal stabilizer.

The content of the metal antibacterial agent is preferably 0.1 to 2.0% by weight of the total weight of the hardener portion (B). For example, silver nitrate, copper nitrate, zinc nitrate, etc. may be used. When using Ag+ ions, it is desirable to use isopropanol to store silver ions stably on a desk under fluorescent light for more than 60 hours. When other alcohols are used, the color of the solution changes as metal salts precipitate or metal nanoparticles are formed within 60 hours. Since metal salts are ionic compounds, they dissolve well in aqueous solutions, but the metal salts themselves do not dissolve in the hardener to be used, so they must be mixed with hardener B using an alcohol solution. Even if the alcohol is blown away under vacuum conditions after being added to the hardener B, the metal antibacterial agent is stably dispersed in the hardener B. Metal antibacterial agents are manufactured by dissolving metal salts in an alcohol solution at a weight ratio of 10 to the total weight. When the concentration of the metal salt becomes more than 11 weight ratio compared to the total weight of the alcohol solution, the metal salt precipitates in the solution, and when the concentration of the metal salt becomes less than 1 weight ratio compared to the total weight of the alcohol solution, the antibacterial properties decrease under the current dosage conditions.

It is added as an alcohol solution and based on the amount of metal. During curing, all alcohol is blown away and does not affect the physical properties of the final paint film.

The metal stabilizer is,

Polyvinylbutyral (PVB) having the following formula (5) and a molecular weight of 1,000 to 15,000,000 g/mol can be used.

<Formula 5>

(In Formula 5, n is an integer from 4 to 102,000)

The ratio of the metal stabilizer is preferably 0.1 to 100 times the mass of the metal atom.

This polymer has many oxygen atoms in its molecular structure, so it can stabilize the metal ion by sharing electrons from the oxygen atom to the surrounding metal ion and improve the dispersibility of the metal ion. Other polymers are difficult to use, and only PVB is highly soluble in isopropanol and can sufficiently stabilize metal ions for more than 120 hours. When other polymers are added, silver ions are rapidly reduced due to amines (due to polyurea) present in the reaction solution, causing the color of the solution to change. PVB polymer forms a strong bond with metal ions and has the effect of suppressing the reduction of silver caused by amines caused by polyurea.

If the molecular weight is less than 1000 g/mol, it is difficult to stabilize the metal ion, and if the molecular weight is greater than 15,000,000 g/mol, the polymer is insoluble regardless of the amount of isopropanol used.

The UV stabilizer or antioxidant suppresses yellowing of the polyaspartic urea antibacterial grout film. The polyaspartic urea antibacterial joint composition, unlike conventional epoxy or polyurea, uses aliphatic materials on both the main part (A) and the hardener part (B), so yellowing rarely occurs, but additional UV stabilizer is added. Prevent discoloration and yellowing from occurring even over a long period of time. The content of the ultraviolet stabilizer or antioxidant is preferably 0.2 to 1.0% by weight of the total weight of the hardener part (B), and when used in less than 0.2% by weight, it has little effect on the weather resistance of the polyaspartic urea antibacterial grout film. , if it exceeds 1.0% by weight, there is no significant change in the weather resistance of the polyaspartic urea antibacterial grout film, so it is economically inefficient. For example, the ultraviolet stabilizer or antioxidant may be TINUVIN B7, TINUVIN 292, 2,6-di-t-butyl-4-methylphenol (BHT), ZIKA-UVS3, Irganox 1010 (trade names above), etc. there is.

The flow control agent is used to control the viscosity and flow properties of the polyaspartic urea antibacterial grout composition. The content of the flow regulator is preferably selected within 0.1 to 4.0% by weight of the total weight of the hardener part (B), taking into account the workability of grout work. If it exceeds 4.0% by weight, the polyaspartic urea antibacterial grout film may matt. This may reduce the gloss. For example, Aerosil 200, HDK H-15 (above product name), etc. may be used as the flow regulator.

Hereinafter, the present invention will be described in more detail through descriptions of preferred embodiments and comparative examples of the present invention. However, the following examples are only examples to aid understanding of the present invention, and the scope of the present invention should not be reduced or limited thereby.

Synthesis of alkoxysilane-modified isocyanate

Alkoxysilane-modified isocyanate was synthesized using 90.6% by weight of hexamethylene-1,6-diisocyanate homopolymer (Product name: HDT, Vencorex) and 9.4% by weight of 3-aminopropyltrimethoxysilane. The synthesis reaction was carried out at a temperature of 65 to 70 degrees for 3 hours until the free NCO (%) reached 17.62 to synthesize alkoxysilane-modified isocyanate (ASM-100R).

Manufacturing of polyaspartic urea antibacterial grout composition

As shown in Table 1 below, the main part (A) and the hardener part (B) of the polyaspartic urea antibacterial grout composition were prepared. The mixing ratio was fixed at Index 105, and a polyaspartic urea composition was prepared by mixing each main part (A) and the hardener part (B).

composition Example One 2 3 4 5 main
my
wealth
(A) Aliphatic isocyanate
(HDT) 90.0 85.0 80.0 75.0 70.0 Alkoxysilane modified isocyanate
crack
(ASM-100R) 10.0 15.0 20.0 25.0 30.0 Sum 100.0 100.0 100.0 100.0 100.0 kyung
fury
my
wealth
(B) Asparticamine
(NH-1420) 50.0 49.0 49.0 49.0 49.0 Asparticamine
(NH-1520) 45.0 45.0 45.0 45.0 45.0 pigment or pearl
(W8760) 3.0 3.0 3.0 3.0 3.0 defoamer
(BYK-066N) 0.3 0.3 0.3 0.3 0.3 Smoothness imparting agent
(BYK-306) 0.2 0.2 0.2 0.2 0.2 Coupling agent
(Z-6300) 0.4 0.4 0.4 0.4 0.4 Metal antibacterial agent 0 1.0 1.0 1.0 1.0 Sunscreen or antioxidant
my
(TINUVIN 292) 0.6 0.6 0.6 0.6 0.6 flow regulator
(HDK H-15) 0.5 0.5 0.5 0.5 0.5 Sum 100.0 100.0 100.0 100.0 100.0 ship
bout
rain Topic section (A) 100.0 100.0 100.0 100.0 100.0 Hardener section (B) 150.0 148.5 147.0 145.5 144.0

Performance evaluation of polyaspartic urea antibacterial grout film

Table 2 below shows the results of evaluating the physical properties of the polyaspartic urea antibacterial grout composition prepared according to the composition in the table above. Comparative Example 1 used a common epoxy grout (HEC-500RH) currently available on the market, and Comparative Example 2 used a polyurea product (HSC-D50PR) used as a floor coating material.

After mixing and stirring the main part and the hardener part at 300 rpm for 1 minute with a stirrer according to the mixing ratio, a coating film of about 1 mm thickness was made on a polyethylene (PE) plate, cured for 7 days in a constant temperature and humidity chamber at a temperature of 25°C and humidity of 60%, and gel time. Tensile strength, elongation, adhesive strength, hardness, etc. were measured. Specifically, using a universal tensile tester, tensile strength and elongation were measured using the KS F 4922 test method, and adhesive strength was measured using the KS L 1592 method, and hardness was measured using a Shore D hardness tester. Abrasion resistance was measured by the reduced weight of the coating film using the method of ASTM D4060-10 (H22 wheel, 9.8N road, 1000 cycle). Discoloration stability was measured using the ASTM G154-12 (UVA-340 Lamp, 4hr UV, 4hr Condensation, total 1000hr) method to determine whether discoloration and yellowing occurred after exposure to ultraviolet rays for 1000 hours. Housework time measured the time available for work. The antibacterial test was conducted against Staphylococcus aureus and pneumoniae using the KS K 0693:2016 method.

characteristic Example Comparative example Test Methods One 2 3 4 5 One 2 Pot life (minutes) 29 27 26 25 25 26 0.1 -
Tensile strength (N/mm ² ) 17.4 19.1 22.2 25.6 27.1 19.9 20,1 KS F 4922 Elongation rate (%) 95 87 65 52 35 11 350 KS F 4922
Adhesive strength (N/mm ² ) 7.8 8.0 8.5 9.6 10.4 8.6 8.8 KS L 1592 Hardness (Shore D) 50 50 52 53 54 53 45 ASTM D2240 Abrasion resistance (mg) 26 20 15 13 7 11 46 ASTM D4060 Discoloration stability (QUV, 1000h) Great Great Great Great Great discoloration discoloration ASTM G154 Staining resistance Great Great Great Great Great Great pollution - antibacterial 22.4% 99.9% 99.9% 99.9% 99.9% 23.2% 22.1% KS K 0693:2016

Through the results of Examples 1 to 5 and Comparative Examples 1 to 2, it was found that the adhesive strength and tensile strength of the polyaspartic urea antibacterial grout composition containing alkoxy modified isocyanate had excellent physical properties equivalent to or better than those of existing epoxy or general polyurea. I knew I had it. Products containing metal antibacterial agents showed excellent antibacterial properties. Example 1 and Comparative Examples 1 and 2 without the metal antibacterial agent did not show antibacterial activity.

In terms of elongation, we were able to obtain results that were at least 3 to 9 times more improved than epoxy joints. This is due to its higher elasticity than epoxy joints, which carry the risk of damage to the coating film due to shock, vibration, or cracks in the building. It was found that damage to the coating film due to shock and vibration could be prevented, thereby improving durability.

In the case of the joint using the general polyurea system of Comparative Example 2, a dedicated polyurea coating machine must be used due to the fast curing speed, but in the case of the polyaspartic urea antibacterial joint of the present invention, aliphatic isocyanate and aspartic amine are used. It was confirmed that manual work was possible due to slow responsiveness and a pot life of more than 20 minutes.

Through the results of the examples, it was confirmed that the polyaspartic urea antibacterial grout composition does not cause discoloration or yellowing of the surface even after long-term exposure to ultraviolet rays than aromatic polyurea or bisphenol structured epoxy due to its aliphatic structure, and the addition of antibacterial agents As a result, it was confirmed that it exhibited antibacterial properties.

Claims (6)

In the polyaspartic urea antibacterial tile joint repair composition,
Polyaspartic urea is an aliphatic isocyanate having a structure of Formula 1 below and 70 to 90% by weight of an aliphatic isocyanate having a structure of Formula 1 below, and an alkoxysilane of Formula 2 below. An alkoxysilane having a structure of Formula 3 below. Main part (A) containing 10 to 30% by weight of modified isocyanate; And 70 to 95% by weight of aspartic amine having the structure of formula 4 below, 3 to 10% by weight of pigment or pearl for forming the desired color of the resulting joint, 0.1 to 0.5% by weight of antifoam, and 0.1% by weight of smoothness imparting agent. Additive 1 containing ~0.5% by weight, 0.3~2.0% by weight of coupling agent, 0.1~2.0% by weight of metal antibacterial agent to impart antibacterial properties, 0.2~1.0% by weight of ultraviolet stabilizer or antioxidant, and 0.1~4.0% by weight of flow regulator. It consists of a hardener part (B) containing ~10% by weight, and the main part (A) and the hardener part (B) are mixed at 100 to 180% by weight of the hardener part (B) with respect to 100% by weight of the main part (A). characterized by
Polyaspartic urea antibacterial tile grout repair composition.
<Formula 1>

<Formula 2>

(In Formula 2, R ₁ and R ₂ independently represent a straight-chain or branched alkyl group having 1 to 10 carbon atoms, or have the same meaning as R 3 , or R ₃ is a straight _- chain or branched alkyl group having 1 to 8 carbon atoms. Represents _{an alkoxy} group _{of the} side _{chain ,} and It is a straight-chain, branched-chain, aliphatic or aromatic hydrocarbon having 1 to 10 carbon atoms substituted by , and m and n are integers of 1 to 8.)
<Formula 3>

<Formula 4>


(At this time, Y = , , It is one of the following, or a mixture of two or more.)
The method of claim 1, wherein the alkoxysilane-modified isocyanate of Formula 3 can be obtained by reacting a hexamethylene-1,6-diisocyanate homopolymer having the structure of Formula 1 with an alkoxy silane of Formula 2, and the alkoxysilane-modified isocyanate of Formula 2 is In the synthesis, the polyaspartic urea antibacterial tile grout repair composition is characterized in that the content of alkoxysilane is 27 to 33 equivalent % based on 100 equivalent % of hexamethylene-1,6-diisocyanate homopolymer. The method of claim 2, wherein the alkoxysilane is N-methyl-3-aminopropyltrimethoxysilane, N-ethyl-3-aminopropyltrimethoxysilane, N-ethyl-3-aminopropyldiethoxymethylsilane, N -Ethyl-3-aminopropyltriethoxysilane, N-ethyl-3-aminopropylmethyldimethoxysilane, N-butyl-3-aminopropyltrimethoxysilane, 3-(N-methyl-2-amino-1- Methyl-1-ethoxy)-propyltrimethoxysilane, N-ethyl-4amino-3,3-dimethylbutylmethoxysilane, N-ethyl-4-amino-3,3-dimethylbutyltrimethoxysilane, 3-Mercaptopropylsilane. Any one or a mixture of two or more selected from the group consisting of N-cyclohexyl-3-aminomethylpropyldimethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane, and N-anilinomethyltrimethoxysilane. characterized by
Polyaspartic urea antibacterial tile grout repair composition. The method of claim 1, wherein the metal antibacterial agent is:
Characterized in that it contains one or more metal atoms selected from Ag, Cu, and Zn and a metal stabilizer.
Polyaspartic urea antibacterial tile grout repair composition. The method of claim 4, wherein the metal stabilizer is:
Characterized in that it is polyvinyl butyral (PVB) with a molecular weight of 1,000 to 15,000,000 g/mol having the following formula 5:
Polyaspartic urea antibacterial tile grout repair composition.
<Formula 5>

(In Formula 5, n is an integer from 4 to 102,000) The method of claim 1, wherein the metal antibacterial agent is:
Characterized in that it contains 0.1g to 100g of metal stabilizer per 1g of metal atom.
Polyaspartic urea antibacterial tile grout repair composition.