KR20210103410A - Water paint composition for removal of particulate matter - Google Patents

Abstract

The present invention relates to a composition for a water-based paint. Provided is a water-based paint composition including: 10 to 30% by weight of an acrylic emulsion resin; 1 to 20% by weight of a silicone resin; 10 to 30% by weight of titanium dioxide; 1 to 20% by weight of calcite; 0.1 to 10% by weight of a dispersant; 0.1 to 10% by weight of an antifoaming agent; 0.1 to 10% by weight of a thickener; and the remaining amount of water.

Description

Water-based paint composition for removing fine dust {Water paint composition for removal of particulate matter}

The present invention relates to a water-based paint composition, which can impart fine dust removal ability to a water-based paint for construction.

Architectural paints such as oil-based paints, water-based paints, natural resin paints, and synthetic resin paints are used for physical and chemical protection and aesthetics of the interior and exterior surfaces of buildings.

Most of the paints used to form the coating film are petrochemical products, and the production process is complicated, and unreacted monomers, volatile organic compounds (VOCs), and other harmful substances that cause environmental pollution in the manufacturing process are inevitably generated. There is this.

In particular, "Sick House Syndrome" caused by volatile organic compounds and other harmful substances generated from paint is emerging as an environmental problem that needs to be urgently resolved.

This sick house syndrome is caused by harmful substances generated from concrete, furniture, adhesives, wallpaper, paint, etc. of various buildings, electromagnetic waves, formaldehyde, other organic solvents, gas, dust and environmental pollutants such as various volatile organic compounds, cosmetics, perfumes, Gaseous substances emitted from cigarettes, washed clothes, vinyl chloride, and printed ink are suggested as major causes.

In order to solve the above problems, eco-friendly products that do not contain volatile organic compounds have recently appeared in furniture, adhesives, paints, wallpapers, etc. Paints and coatings that activate the functions of the human body have been proposed and used.

Fine dust is a particulate matter suspended in the air, and it is common on roads such as automobile exhaust gas, combustion of fossil fuels, and road dust, factory playgrounds such as cement, coal, soil and aggregates, mines, road construction sites, and construction sites. It occurs almost throughout the human life zone including various industrial sites such as

Fine dust includes micro dust with a size of micrometers, and in general, depending on the particle size, PM50 with a particle size of 50 μm or less, fine dust with a particle size of 10 μm or less (PM10), and ultrafine dust with a particle size of 2.5 μm or less (PM2. 5), and ultrafine dust (PM1.0) with a particle diameter of 1.0 μm or less. Fine dust with a particle diameter of 10 μm or less is small enough to be invisible, so it can easily enter the body through the respiratory system. lower it

A method of spraying water or a compound into the atmosphere is known to suppress fine dust, but there is a problem such as insufficient suppression efficiency or environmental pollution.

Accordingly, there is a need for an effective and environmentally friendly means for removing fine dust.

Background art of the present invention is disclosed in Korean Patent Application Laid-Open No. 10-2005-0100050.

An object of the present invention is to provide a water-based paint composition capable of adsorbing fine dust and removing it from the atmosphere.

Another object to be solved by the present invention is to provide a water-based paint composition capable of washing off fine dust adsorbed on the water-based paint by rainwater or water spray.

Another object to be solved by the present invention is to provide a water-based paint composition having excellent fine dust removal function, excellent weather resistance, washing resistance, and durability, and excellent storage stability.

Another problem to be solved by the present invention is to provide a water-based paint composition that can ensure the protection of the substrate.

Another problem to be solved by the present invention is to provide a water-based paint composition capable of imparting an aesthetic feeling to the appearance.

Another problem to be solved by the present invention is to provide an eco-friendly water-based paint composition.

Another problem to be solved by the present invention is to provide an economical aqueous coating composition with a simple manufacturing process.

One aspect of the present invention is an aqueous coating composition, based on the total weight of the composition, 10 to 30% by weight of an acrylic emulsion resin, 1 to 20% by weight of a silicone resin, 10 to 30% by weight of titanium dioxide, 1 to 20% by weight of calcite, and a dispersant It relates to a water-based paint composition comprising 0.1 to 10% by weight, 0.1 to 10% by weight of an antifoaming agent, 0.1 to 10% by weight of a thickener, and the remaining amount of water.

Another aspect of the present invention relates to a water-based paint composition, wherein the acrylic emulsion resin includes at least one of a pure acrylic emulsion resin and a styrene-acrylic emulsion resin.

Another aspect of the present invention relates to a water-based paint composition, wherein the titanium dioxide includes at least one of rutile-type titanium dioxide and anatase-type titanium dioxide.

Another aspect of the present invention relates to a water-based paint composition, wherein the composition is for building use.

Another aspect of the present invention relates to a water-based paint composition, wherein the composition has a fine dust removal ability.

Another aspect of the present invention relates to a water-based paint for construction comprising the water-based paint composition.

Another aspect of the present invention relates to a water-based paint for construction, wherein the methylene blue decomposition activity index according to JIS R 1703-2 of the water-based paint is 10 nmol (L·min) or more.

The water-based paint composition of the present invention can provide a water-based paint composition capable of adsorbing fine dust and removing it from the atmosphere.

The water-based paint composition of the present invention can provide an effect of simply washing off fine dust adsorbed on the water-based paint by spraying rain or water.

The water-based paint composition of the present invention can provide a water-based paint with excellent fine dust removal function, excellent weather resistance, washing resistance, and durability, and excellent storage stability.

The water-based paint composition of the present invention can provide an aesthetic feeling to the appearance while ensuring the protection of the substrate.

The water-based paint composition of the present invention can provide an eco-friendly water-based paint.

The water-based paint composition of the present invention may exhibit high photocatalytic activity and provide excellent fine dust adsorption power.

The water-based paint composition of the present invention can provide a water-based paint exhibiting high photocatalytic activity and a stable formulation at the same time.

The water-based paint composition of the present invention can be prepared through simple mixing of components, so that the manufacturing process is simple, and an economical water-based paint composition can be provided.

1 is a photocatalytic property evaluation test report for a water-based paint composition of an embodiment of the present invention.
2 and 3 are standard physical property evaluation test reports for the water-based paint composition of Examples of the present invention.

Hereinafter, embodiments of the present application will be described in more detail. However, the technology disclosed in the present application is not limited to the embodiments described herein and may be embodied in other forms. However, the embodiments introduced herein are provided so that the disclosed content may be thorough and complete, and the spirit of the present application may be sufficiently conveyed to those skilled in the art. In addition, those skilled in the art will be able to implement the idea of the present application in various other forms without departing from the technical spirit of the present application.

As used herein, “water-based paint” refers to a paint using water as a solvent, and may be used to form a coating film.

The water-based paint composition according to an embodiment of the present invention may include an acrylic emulsion resin, a silicone resin, titanium dioxide, calcite, a dispersant, an antifoaming agent, a thickener, and the remaining amount of water.

Acrylic Emulsion Resin

The acrylic emulsion resin according to an embodiment of the present invention may include, for example, a pure acrylic emulsion resin, a styrene-acrylic emulsion resin, or a combination thereof. By including the acrylic emulsion resin, it is environmentally friendly and has excellent durability by excluding organic solvents.

As the pure acrylic emulsion resin, those commonly used in water-based paints may be used, for example, methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, butyl methacrylate, lauryl methacrylate, stearyl Methacrylate, ethylene glycol dimethacrylate, butylene glycol trimethacrylate, polyethylene glycol trimethacrylate, pentaacrylic diol trimethacrylate, alkyl methacrylate, cycloalkyl methacrylate, isobutyl methacrylate , t-butyl methacrylate, triethylpropane trimethacrylate, trimethylolpropane trimethacrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 4-hydroxybutyl acrylate, It may include a copolymer of an acrylic acid ester-based monomer selected from 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, and 4-hydroxybutyl methacrylate, for example, commercially available CA- of LUBRIZOL 600 may be used, but is not limited thereto.

As the styrene-acrylic emulsion resin, those commonly used in water-based paints may be used, and for example, may include a copolymer of an acrylic acid ester-based monomer and an aromatic vinyl-based monomer.

The acrylic acid ester-based monomer is, for example, methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, butyl methacrylate, lauryl methacrylate, stearyl methacrylate, ethylene glycol dimethacrylate, butyl Renglycol trimethacrylate, polyethylene glycol trimethacrylate, pentaacrylicdiol trimethacrylate, alkyl methacrylate, cycloalkyl methacrylate, isobutyl methacrylate, t-butyl methacrylate, triethylpropane tri Methacrylate, trimethylolpropane trimethacrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 4-hydroxybutyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylic rate, and 4-hydroxybutyl methacrylate.

The aromatic vinyl-based monomer may be, for example, at least one selected from styrene, α-methylstyrene, trans-β-methylstyrene, β-methylstyrene, and 4-methylstyrene.

For example, the styrene-acrylic emulsion resin is poly(styrene-propyl acrylate), poly(styrene-butyl acrylate), poly(styrene-butadiene-acrylic acid), poly(styrene-butadiene-methacrylic acid), poly(styrene- Butylacrylate-acrylic acid), poly(styrene-butylacrylate-methacrylic acid), poly(styrene-butylacrylate-acrylonitrile), poly(styrene-butylacrylate-acrylonitrile-acrylic acid) and styrene/ It may include at least one selected from butyl acrylate/carboxylic acid terpolymer, and styrene/butyl acrylate/beta-carboxyethyl acrylate terpolymer.

The acrylic emulsion resin contains 10% by weight or more, 11% by weight or more, 12% by weight or more, 13% by weight or more, 14% by weight or more, 15% by weight or more, 16% by weight or more, 16.5% by weight or more, based on the total weight of the composition; 17 wt% or more, 17.5 wt% or more, 18 wt% or more, 18.5 wt% or more, 19 wt% or more, 19.5 wt% or more, or 20 wt% or more, and 30 wt% or less, 29.5 wt% or less, 29 wt% or less, 28.5 wt% or less, 28 wt% or less, 27.5 wt% or less, 27 wt% or less, 26.5 wt% or less, 26 wt% or less, 25.5 wt% or less, 25 wt% or less, 24.5 wt% or less, 24 wt% or less or less, 23.5 wt% or less, 23 wt% or less, 22.5 wt% or less, 22 wt% or less, 21.5 wt% or less, 21 wt% or less, 20.5 wt% or less, or 20 wt% or less. For example, the acrylic emulsion resin may be included in an amount of 16 wt% to 30 wt%, or 18 wt% to 30 wt% based on the total weight of the composition. Within the above range, the coating film may have excellent hardness, excellent appearance, excellent water resistance and durability, and excellent fine dust adsorption efficiency.

silicone resin

The silicone resin according to an embodiment of the present invention is, for example, a polysiloxane resin. Including silicone resin, it may be excellent in curing easiness, adhesion of paint, weather resistance and water repellency.

The polysiloxane resin may include, for example, a hydrolysis-condensation product of a silicon-based compound. The silicon-based compound is, for example, an organoalkoxysilane such as methyltrimethoxysilane (MTMOS), methyltriethoxysilane (MTEOS), dimethyldiethoxysilane (DMDEOS), phenyl triethoxysilane (PTEOS), dimethyl dimethoxysilane and phenyltrimethoxysilane, tetraethylorthosilicate (TEOS), siloxane, methylsiloxane, polysiloxane, phenylsiloxane, dimethylsiloxane, diphenylsiloxane, methylphenylsiloxane, polyphenylsiloxane, polymethylphenylsiloxane, polymethylsiloxane, Silsesquioxane, polysilsesquioxane, methylsilsesquioxane, phenylsilsesquioxane, methylphenylsilsesquioxane, polyphenylsilsesquioxane, polymethylphenylsilsesquioxane, and polymethylsilsesquioxane It may include one or more selected from among, but is not limited thereto.

The polysiloxane resin may be, for example, polydimethylsiloxane, organic modified polysiloxane, epoxy-modified polysiloxane, polyether-modified polysiloxane, epoxy/polyether-modified polysiloxane, methacrylic-modified polysiloxane, acrylic-modified polysiloxane, phenol-modified polysiloxane, or carbinol-modified polysiloxane It may include at least one selected from polysiloxane, methylhydrogen-modified polysiloxane, methylstyryl-modified polysiloxane, and polymethylalkylsiloxane, but is not limited thereto.

The silicone resin is 1 wt% or more, 2 wt% or more, 3 wt% or more, 4 wt% or more, 5 wt% or more, 6 wt% or more, 7 wt% or more, 8 wt% or more, 9 wt% or more, based on the total weight of the composition At least 10 wt%, at least 11 wt%, at least 12 wt%, at least 13 wt%, at least 13.1 wt%, at least 13.2 wt%, at least 13.3 wt%, at least 13.4 wt%, at least 13.5 wt%, 13.6 wt% wt% or more, 13.7 wt% or more, 13.8 wt% or more, 13.9 wt% or more, 14 wt% or more, 14.1 wt% or more, 14.2 wt% or more, 14.3 wt% or more, 14.4 wt% or more, 14.5 wt% or more, 14.6 wt% or more At least 14.7 wt%, at least 14.8 wt%, at least 14.9 wt%, or at least 15 wt%, and at most 20 wt%, at most 19.5 wt%, at most 19 wt%, at most 18.5 wt%, at most 18 wt% , 17.5 wt% or less, 17 wt% or less, 16.5 wt% or less, 16 wt% or less, 15.5 wt% or less, or 15 wt% or less. For example, the silicone resin may be included in an amount of 13 wt% or more and 20 wt% or less based on the total weight of the composition. Within the above range, the resin compatibility is excellent, the coating film hardness, paint adhesion, weather resistance, and water repellency are excellent, the appearance is excellent, the fine dust adsorption effect is excellent, and the removal of the fine dust adsorbed to the paint can be easy. have.

titanium dioxide

Titanium dioxide according to an embodiment of the present invention has photocatalytic activity, and may exhibit effects such as adsorption of fine dust, decomposition of organic pollutants, decomposition of microorganisms, and deodorization, including titanium dioxide as a photocatalyst.

The titanium dioxide may include one or more of rutile-type titanium dioxide and anatase-type titanium dioxide, and may include, for example, anatase-type titanium dioxide.

The titanium dioxide may be, for example, a powder having a nano-sized particle size, for example, the average particle size may be 1 nm to 150 nm. Within the above range, ease of application and photocatalytic activity may be more excellent.

Titanium dioxide is 10 wt% or more, 11 wt% or more, 12 wt% or more, 13 wt% or more, 14 wt% or more, 15 wt% or more, 16 wt% or more, 17 wt% or more, 18 wt% or more, based on the total weight of the composition. % or more, 19 wt% or more, 20 wt% or more, 21 wt% or more, 22.0 wt% or more, 22.1 wt% or more, 22.2 wt% or more, 22.3 wt% or more, 22.4 wt% or more, 22.5 wt% or more, 22.6 wt% or more % or more, 22.7 wt% or more, 22.8 wt% or more, 22.9 wt% or more, 23.0 wt% or more, 23.1 wt% or more, 23.2 wt% or more, 23.3 wt% or more, 23.4 wt% or more, 23.5 wt% or more, 23.6 wt% or more % or more, 23.7 wt% or more, 23.8 wt% or more, 23.9 wt% or more, 24.0 wt% or more, 24.1 wt% or more, 24.2 wt% or more, 24.3 wt% or more, 24.4 wt% or more, 24.5 wt% or more, 24.6 wt% or more % or more, 24.7 wt% or more, 24.8 wt% or more, 24.9 wt% or more, or 25.0 wt% or more, and 30.0 wt% or less, 29.5 wt% or less, 30.0 wt% or less, 29.5 wt% or less, 29.0 wt% or less, 28.5 wt% or less, 28.0 wt% or less, 27.5 wt% or less, 27.0 wt% or less, 26.5 wt% or less, 26.0 wt% or less, 25.5 wt% or less, or 25.0 wt% or less. For example, titanium dioxide may be included in an amount of 22 to 30% by weight, or 23 to 30% by weight, based on the total weight of the composition. Within the above range, the storage stability of the paint is excellent, the photocatalytic activity is excellent, it is possible to impart a color to the paint, and it is possible to impart a hiding power to the paint.

calcite

Calcite according to an embodiment of the present invention may be pulverized calcite. The calcite may be included as a filler, and it is environmentally friendly because it does not emit volatile organic compounds. Calcite has excellent compatibility with the rest of the composition, and thus functions as a filler without impairing its effectiveness.

The pulverized calcite powder may have a particle size of 300 mesh to 1500 mesh. Within the above range, the ease of application of the paint may be more excellent, and the dispersion stability of the filler may be excellent.

Calcite is 1 wt% or more, 2 wt% or more, 3 wt% or more, 4 wt% or more, 5 wt% or more, 6 wt% or more, 7 wt% or more, 8 wt% or more, 9 wt% or more, based on the total weight of the composition or more, or 10 wt% or more, 20 wt% or less, 19 wt% or less, 18 wt% or less, 17 wt% or less, 16 wt% or less, 15 wt% or less, 14 wt% or less, 13 wt% or less, 12 wt% or less Weight % or less, 11 wt% or less, or 10 wt% or less may be included. The calcite may be included, for example, in an amount of 1 to 20% by weight based on the total weight of the composition. Within the above range, the function as a filler may be excellent without impairing the effect of the composition, and the fine dust removal function may be excellent.

additive

The composition according to an embodiment of the present invention may include additives for paints, such as a dispersant, an antifoaming agent, and a thickener.

The dispersing agent can help disperse the pigment and resin and prevent re-solidification during coating production, and a dispersant commonly used for water-based coatings can be used. Anionic, cationic, nonionic surfactants may be used as the dispersant, but the present invention is not limited thereto. For example, sodium polyacrylate, saponification of styrene maleic anhydride copolymer, alkylnaphthalene sulfonate-formalin condensate, sodium ligrin sulfonate, polyethylene glycol phenyl ether, and sodium polycarboxylate may be used as the dispersant, such as Commercially available dispersants such as the DISPERBYK series from BYK, ^{the TRITON series such as TRITON TM} CF-10 and TRITON ^TM X-100 can also be used.

The antifoaming agent can suppress the foaming of the paint, and an antifoaming agent commonly used for water-based paints can be used. As the defoaming agent, a silicone-based anti-foaming agent, a non-silicone-based polymeric anti-foaming agent, etc. may be used, but the present invention is not limited thereto. For example, as an antifoaming agent, fatty acid salts, higher alcohol sulfates, liquid fatty oil sulfate esters, sulfates of fatty amines and aliphatic amides, aliphatic alcohol phosphoric acid esters, sulfonates of dibasic fatty acid esters, fatty acid amide sulfonates, alkylallylsulfonic acids Salts, formalin condensed naphthaline sulfonates, polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenol ethers, polyoxyethylene alkyl esters, sorbitan alkyl esters, polyoxyethylene sorbitan alkyl esters, acrylic polymer, silicone An antifoaming agent including a mixed acrylic polymer, a vinyl polymer, a polysiloxane compound, etc. may be used, for example, BYK-028, BYK-034, BYK-011, BYK-024, BYK-022, etc. of BYK-Chemie GmbH, SAN NPCO Nopco's Nopco NXZ, SN-DEFOAMER 1370, SN-DEFOAMER 1070, etc., Surfynol 104E, Surfynol DF-58, TEGO's TEGO foamex 1488, TEGO Airex-901, TEGO foamex810, Dow Corning's DB-110A, ShinEtsu's KMK-73, etc. The same commercially available antifoaming agents may also be used.

The thickener may improve the formulation stability of the paint by adjusting the viscosity of the paint, and may contribute to storage stability, and a thickener commonly used for water-based paints may be used. As the thickener, a polyurethane-based thickener, an acrylic-based thickener, a cellulose-based thickener, guar gum, xanthan gum, sodium alginate, aluminum octate, and the like may be used, but is not limited thereto. For example, a polyurethane-based thickener, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose, carboxymethyl cellulose, sodium polyacrylate, polyvinyl alcohol, and the like can be used.

The dispersing agent, the antifoaming agent and the thickening agent are each 0.1 wt% or more, 0.2 wt% or more, 0.3 wt% or more, 0.4 wt% or more, 0.5 wt% or more, 0.6 wt% or more, 0.7 wt% or more, 0.8 wt% based on the total weight of the composition % or more, 0.9% or more, 1.0% or more, 1.5% or more, 2.0% or more, 2.5% or more, 3.0% or more, 3.5% or more, 4.0% or more, 4.5% or more, or 5.0 % or more, 10.0 wt% or less, 9.5 wt% or less, 9.0 wt% or less, 8.5 wt% or less, 8.0 wt% or less, 7.5 wt% or less, 7.0 wt% or less, 6.5 wt% or less, 6.0 wt% or less, 5.5 wt% or less, or 5.0 wt% or less may be included. For example, the dispersing agent, the antifoaming agent, and the thickening agent may each be included in an amount of 0.1 wt% to 5 wt% based on the total weight of the composition. While exhibiting the additive function within the above range, the stability of the paint may be excellent, and the fine dust removal function may be excellent because the composition effect is not impaired.

Furthermore, the composition according to an embodiment of the present invention may further include components commonly used in water-based paints, such as pigments and dyes.

water

The composition according to an embodiment of the present invention may include water in the remaining amount. Water can dissolve the resin and make the pigment and resin uniform.

The water may be included in the remaining amount relative to the content of the remaining components, for example, 5% by weight or more, 6% by weight or more, 7% by weight or more, 8% by weight or more, 9% by weight or more, 10% by weight or more based on the total weight of the composition. % or more, 11 wt% or more, 12 wt% or more, 13 wt% or more, 14 wt% or more, 15 wt% or more, 16 wt% or more, 17 wt% or more, or 18 wt% or more, 20 wt% or less, 19 % or less, 18% or less, 17% or less, 16% or less, 15% or less, 14% or less, 13% or less, 12% or less, 11% or less, or 10% or less may include The calcite may be included, for example, in an amount of 1 to 20% by weight based on the total weight of the composition.

The water-based paint composition according to an embodiment of the present invention may be used for buildings, for example, it may be used to protect the surface of a concrete building and to decorate the exterior.

The water-based paint composition according to an embodiment of the present invention has excellent photocatalytic activity. For example, the water-based paint according to an embodiment of the present invention may have a methylene blue decomposition activity index of 10 nmol (L·min) or more according to JIS R 1703-2. have.

In addition, while containing a photocatalyst, the formulation stability of the water-based paint is excellent, the coating film hardness is excellent, the appearance is excellent, the water resistance and durability are excellent, and the paint adhesion, weather resistance, and water repellency are excellent.

The water-based paint composition according to an embodiment of the present invention has excellent fine dust removal ability. Specifically, the water-based paint composition according to an embodiment of the present invention has excellent fine dust adsorption capacity because it has excellent water resistance and water repellency in addition to the photocatalytic activity, and it is also easy to remove fine dust adsorbed on the paint by water or rainwater. have.

That is, the water-based paint composition according to an embodiment of the present invention has excellent fine dust removal ability by using the combination of the specific component and the specific content, and the physical properties of the water-based paint as a paint according to the addition of the photocatalyst are not lowered, so that the coating film hardness It is possible to provide a composition having excellent properties, excellent appearance, excellent water resistance and durability, and excellent paint adhesion, weather resistance, and water repellency.

Since the water-based paint composition can be prepared by simply mixing the above-mentioned components, the manufacturing process is simple and economical.

The manufacturing method of the water-based paint composition according to an embodiment of the present invention may include, for example, mixing the acrylic emulsion resin, silicone resin, titanium dioxide, calcite, dispersant, defoaming agent, thickener, and the remaining amount of water. The water-based paint composition according to an embodiment of the present invention has excellent compatibility of its components and excellent dispersion and mixing properties, so it can be prepared simply by mixing each component.

For example, the mixing may be performed by stirring, and the stirring may be performed using, for example, a commonly used mixing device. Examples of the mixing device include, but are not limited to, a homomixer, a ball mill, a sand mill, a roll mill, and the like.

The water-based paint according to an embodiment of the present invention may include the water-based paint composition according to the embodiment of the present invention.

The water-based paint may be prepared, for example, by mixing and stirring the components of the water-based paint composition at 75°C to 85°C, aging at 75°C to 85°C for 60 minutes to 150 minutes, and then cooling to room temperature. After the cooling, foreign matter removal may be additionally performed.

The water-based paint may be applied to form a coating film on the surface of the building, protecting the surface of the building and providing an appearance according to various colors. The coating film formed after application of the water-based paint exhibits a photocatalytic function and can adsorb fine dust to the surface.

Fine dust adsorbed on the surface may be removed by natural washing by rain or may be removed by spraying water.

Hereinafter, the configuration and effect of the present invention will be described in more detail with reference to Examples, Comparative Examples and Test Examples. However, these Examples, Comparative Examples and Test Examples are provided only for the purpose of illustration to help the understanding of the present invention, and the scope and scope of the present invention are not limited by the following Examples, Comparative Examples and Test Examples.

Example

Acrylic emulsion resin, titanium dioxide, water, silicone resin, and calcite were put into a stirring vessel in the amounts shown in Table 1 below, followed by primary stirring at 75°C to 85°C for 40 minutes. A dispersant, an antifoaming agent, and a thickener were added to the stirring vessel, followed by secondary stirring, and after secondary stirring, the mixture was aged at 75°C to 85°C for 120 minutes, and then cooled until the temperature of the mixture reached 30°C. After cooling, the mixture was passed through a fine mesh to remove various foreign substances, and a 100 kg composition from which foreign substances were removed was prepared.

Poly(styrene-butyl acrylate) resin was used as the acrylic emulsion resin, and 3-(2-aminoethylamino)propyl-trimethylsilyloxysilicone (CAS No. 75718-16-0) was used as the silicone resin, As the dispersant, a mixture of 80% by weight of sodium polycarboxylate, 17% by weight of polyethylene glycol benzyl(1,1,3,3-tetramethylbutyl)phenyl ether, and 3% by weight of polyethylene glycol octylethyl ether was used. A mixture of BYK-024 (BYK-Chemie GmbH) as an antifoaming agent and 70 wt% of a polyurethane resin and 30 wt% of hydroxyethyl cellulose was used as a thickener.

Content (kg) Acrylic Emulsion Resin 20 silicone resin 15 titanium dioxide 25 calcite 10 dispersant 5 antifoam 5 thickener 5 water 15 Sum 100

Test Example 1: Evaluation of photocatalytic properties

The photocatalytic properties were evaluated under the following conditions using the test and analysis method of Japanese Industrial Standard JIS R 1703-2 using the prepared Example composition, and the results are shown in FIG. 1 .

Light irradiation conditions: SANKYO DENKI LAMP FL20SBLB, 1 m/cm ² (more than 12 hours)

Pretreatment: methylene blue 20 μmol/L Conditioning for more than 12 hours

Test solution: methylene blue 10 mol/L

Absorbance measurement: Termo scientific Genesys 150 UV meter

As can be seen in FIG. 1 , the composition of Example exhibits a methylene blue decomposition activity index of 12.1 nmol (L·min), and exhibits a remarkably superior effect of 2 times or more compared to the Japanese JIS regulations (5 or more).

Test Example 2: Evaluation of standard physical properties of paint

A standard test of the water-based paint was performed according to the Korean Industrial Standard KS M 6010: 2014 using the prepared example composition, and the results are shown in FIG. 2 .

As shown in FIG. 2 , the composition of the example has excellent physical properties in all test items, so it is excellent in removing fine dust and at the same time has excellent weather resistance, washing resistance, durability, storage stability, etc. can be checked

Claims (7)

A water-based paint composition comprising:
Based on the total weight of the composition, 10 to 30% by weight of an acrylic emulsion resin, 1 to 20% by weight of a silicone resin, 10 to 30% by weight of titanium dioxide, 1 to 20% by weight of calcite, 0.1 to 10% by weight of a dispersant, 0.1 to 10% by weight of an antifoaming agent %, 0.1 to 10% by weight of a thickener, and the remaining amount of water, the water-based paint composition. According to claim 1,
The acrylic emulsion resin comprises at least one of a pure acrylic emulsion resin and a styrene-acrylic emulsion resin. According to claim 1,
The titanium dioxide is an aqueous coating composition comprising at least one of rutile-based titanium dioxide and anatase-based titanium dioxide. According to claim 1,
The composition is for construction, a water-based paint composition. According to claim 1,
The composition has a fine dust removal ability, a water-based paint composition. A water-based paint for construction, comprising the water-based paint composition according to any one of claims 1 to 5. 7. The method of claim 6,
Water-based paint for construction with a methylene blue decomposition activity index of 10 nmol (L·min) or more according to JIS R 1703-2 of the water-based paint.

Images