KR100584472B1 - Acrylic emulsion resin composition, method of preparing the same and aqueous paint composition comprising the same - Google Patents

Abstract

Acrylic emulsion resin compositions, methods for their preparation, and aqueous coating compositions comprising the same are disclosed. 30 to 70 parts by weight of the acrylic ester monomer, 10 to 50 parts by weight of the aromatic vinyl monomer, 10 to 60 parts by weight of the monomer mixture including 1 to 10 parts by weight of the acrylic monomer for promoting adhesion and 0.5 to 4 parts by weight of the organic acid monomer, the interface An addition polymerization mixture is prepared by mixing 0.2 to 5 parts by weight of the active agent and 0.1 to 1 part by weight of the radical polymerization initiator catalyst. Subsequently, the pH of the addition polymerization mixture is adjusted to 7 to 10 to prepare an acrylic emulsion resin composition. The aqueous coating composition containing the acrylic emulsion resin composition forms a dry coating film having excellent durability and wear resistance at room temperature. An aqueous coating composition for flooring is provided by introducing silica sand into the aqueous coating composition to improve the anti-slip effect and adhesion.

Description

ACRYLIC EMULSION RESIN COMPOSITION, METHOD OF PREPARING THE SAME AND AQUEOUS PAINT COMPOSITION COMPRISING THE SAME}

The present invention relates to an acrylic emulsion resin composition, a preparation method thereof and an aqueous coating composition comprising the same. More particularly, the present invention relates to an acrylic emulsion resin composition exhibiting excellent adhesion, abrasion resistance and durability, a method for preparing the same, and an aqueous coating composition comprising the same.

In general, paints used for flooring applications have generally used oil-based paints such as urethane resins and epoxy resins and hardly used water-based paints. The floor paints currently used in Korea are oil paints and contain large amounts of petroleum solvents. Therefore, it volatilizes during painting, causing air pollution, causing a high risk of fire, and causing odors, causing many problems for the health and safety of workers. Therefore, there is an increasing demand for the development of a water-based paint for flooring to solve various problems of the oil-based paint for flooring.

Floor paints currently in use include one-component paints using urethane resins and two-component paints. The coating material for the flooring material using the urethane resin is coated at room temperature by adding a diluent to the liquid paint during painting, and is used for floors that do not require much durability. The coating material for the flooring material using the urethane resin is very poor in adhesion to the surface of the asphalt system, there is a problem in applying to asphalt. There are paints using general water-based elastic emulsions used for amusement parks and other concrete floors, but the paints are contaminated by the adhesion of the surface and thus the product life is not long.

Therefore, the 1st objective of this invention is providing the manufacturing method of the acrylic emulsion resin composition which exhibits the outstanding adhesiveness, abrasion resistance, and durability.

A second object of the present invention is to provide an acrylic emulsion resin composition produced by the above method.

It is a third object of the present invention to provide an aqueous coating composition comprising the acrylic emulsion resin composition produced by the above method.

In order to achieve the first object of the present invention described above, 30 to 70 parts by weight of the acrylic ester monomer, 10 to 50 parts by weight of the aromatic vinyl monomer, 1 to 10 parts by weight of the acrylic monomer for adhesion promotion and 0.5 to 4 of the organic acid monomer An addition polymerization mixture is prepared by mixing 10 to 60 parts by weight of the monomer mixture including parts by weight, 0.2 to 5 parts by weight of surfactant and 0.1 to 1 parts by weight of the radical polymerization initiator catalyst. Subsequently, the pH of the addition polymerization mixture is adjusted to 7 to 10 to prepare an acrylic emulsion resin composition.

In order to achieve the above-described second object of the present invention, 30 to 70 parts by weight of an acrylic ester monomer, 10 to 50 parts by weight of an aromatic vinyl monomer, 1 to 10 parts by weight of an acrylic monomer for promoting adhesion and 0.5 to 4 organic acid monomers After mixing parts by weight to prepare a monomer mixture, 10 to 60 parts by weight of the monomer mixture, 0.2 to 5 parts by weight of surfactant and 0.1 to 1 parts by weight of the radical polymerization initiator catalyst to prepare an addition polymerization mixture, the addition polymerization mixture Adjusting the pH of the 7 to 10 to provide an acrylic emulsion resin composition prepared.

In order to achieve the above-described third object of the present invention, 10 to 50 parts by weight of the acrylic emulsion resin composition, 30 to 60 parts by weight of silica sand having a particle size of 50 to 150 mesh, and talc 5 to 30 It provides an aqueous coating composition comprising parts by weight.

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

In order to prepare an acrylic emulsion resin composition according to the present invention, 30 to 70 parts by weight of an acrylic ester monomer, 10 to 50 parts by weight of an aromatic vinyl monomer, 1 to 10 parts by weight of an acrylic monomer for promoting adhesion, and 0.5 to 4 parts by weight of an organic acid monomer are used. The parts are mixed to prepare a monomer mixture.

As the acrylic ester monomer used in the present invention, methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, normal butyl methacrylate, isobutyl methacrylate, lauryl methacrylate, stearyl methacrylate And butyl acrylate, beta-hydroxybutyl methacrylate, di (ethylene glycol) monomethacrylate, and the like.

When the usage-amount of the said acrylic acid ester monomer is less than 30 weight part with respect to 100 weight part of total monomer total weight, it is difficult to obtain resin which has physical properties, such as a requested | required hardness. When the amount of the acrylic ester monomer used exceeds 70 parts by weight based on 100 parts by weight of the total monomers, the reactivity is poor in the resin synthesis step. Therefore, the amount of the acrylic ester monomer is preferably 30 to 70 parts by weight based on 100 parts by weight of the total monomers.

Examples of the aromatic vinyl monomer used in the present invention include styrene, α-methylstyrene, trans-β-methylstyrene, β-methylstyrene, 4-methylstyrene, and the like.

When the usage-amount of the said aromatic vinylic monomer is less than 10 weight part with respect to 100 weight part of total monomer total weight, it will be hard to obtain resin which has the requested hardness. If the amount of the aromatic vinyl monomer is more than 50 parts by weight based on 100 parts by weight of the total monomers, there is a problem in that it is very vulnerable to weather resistance. Therefore, the amount of the acrylic ester monomer is preferably 10 to 50 parts by weight based on 100 parts by weight of the total monomers.

Examples of the adhesion-promoting acrylic monomers used in the present invention include fumaric acid esters and methacrylamide modified substances.

If the amount of the adhesion-promoting acrylic monomer is less than 1 part by weight based on 100 parts by weight of the total monomer, a problem of inferior adhesiveness occurs when the paint is applied. When the amount of the adhesion-promoting acrylic monomer is more than 10 parts by weight based on 100 parts by weight of the total monomers, sludge is generated during the reaction and is not preferable in terms of cost. Therefore, the amount of the adhesion-promoting acrylic monomer is preferably 1 to 10 parts by weight based on 100 parts by weight of the total monomer.

       Examples of the organic acid monomer used in the present invention include acrylic acid, methacrylic acid, fumaric acid, maleic acid and itaconic acid. These may be used alone or in combination of two or more.

       When the amount of the organic acid monomer used is less than 0.5 part by weight based on 100 parts by weight of the total monomer, freezing stability and storage stability of the resin are inferior. If the amount of the organic acid monomer is more than 4 parts by weight based on 100 parts by weight of the total monomers, there is a problem in that the viscosity of the resin increases during neutralization. Therefore, it is preferable that the usage-amount of the said organic acid type monomer is 0.5-4 weight part with respect to 100 weight part of total monomers.

      10 to 60 parts by weight of the monomer mixture, 0.2 to 5 parts by weight of surfactant and 0.1 to 1 part by weight of the radical polymerization initiation catalyst are mixed to prepare an addition polymerization mixture.

If the amount of the monomer mixture used in the preparation of the addition polymerization mixture is less than 10 parts by weight, there is a problem that the increase in the amount of use and the hardness of the paint decreases when the paint is applied. If the amount of the monomer mixture used in the preparation of the addition polymerization mixture is more than 60 parts by weight, the reactivity decreases as the solid content increases. Therefore, the amount of the monomer mixture is preferably 10 to 60 parts by weight.

Examples of the surfactant used in the preparation of the addition polymerization mixture include sodium dodecylbenzenesulfonate, sodium lauryl sulfate and the like. If the amount of the surfactant is less than 0.2 parts by weight or more than 5 parts by weight, the size of the particles and the viscosity of the resin are not preferable.

Examples of the radical polymerization initiation catalyst used in the preparation of the addition polymerization mixture include ammonium persulfate, sodium persulfate, potassium persulfate and the like. If the amount of the radical polymerization initiating catalyst is less than 0.1 part by weight or more than 1 part by weight, it is not preferable in view of reactivity and particle size.

Subsequently, the pH of the addition polymerization mixture is adjusted to 7 to 10 to prepare an acrylic resin composition. PH adjustment of the addition polymerization mixture is carried out using a pH adjuster. Examples of the pH adjuster include ammonia water, monoethanolamine, diethanolamine, triethanolamine, 1-amino-2-methylpropane, 2-amino-2-methylpropane, triethylamine and the like. Among these, especially preferable is ammonia water. The addition amount of a pH adjuster is 0.1-2 weight part. If the pH is less than 7, curing occurs during storage, causing the viscosity to rise and harden.

It is preferable that the glass transition temperature of the obtained acrylic emulsion resin composition becomes 10-40 degreeC. If the glass transition temperature is less than 10 DEG C, contaminants adhere to the dried coating film and the coating film is contaminated, and a soft coating film is formed, resulting in poor wear resistance. If the glass transition temperature is higher than 40 ° C, the film forming ability is poor and a uniform coating film cannot be formed. In addition, when the film preparation is used to produce a uniform coating film, the amount of use increases, causing bleeding of the asphalt, resulting in poor color.

A monomer mixture is prepared by mixing 30 to 70 parts by weight of an acrylic ester monomer, 10 to 50 parts by weight of an aromatic vinyl monomer, 1 to 10 parts by weight of an acrylic monomer for adhesion promotion, and 0.5 to 4 parts by weight of an organic acid monomer, as described above. After mixing 10 to 60 parts by weight of the monomer mixture, 0.2 to 5 parts by weight of surfactant and 0.1 to 1 parts by weight of the radical polymerization initiator catalyst to prepare an addition polymerization mixture, the pH of the addition polymerization mixture is adjusted to 7 to 10 acrylic An emulsion resin composition is obtained.

The aqueous coating composition for flooring is manufactured using the obtained acrylic emulsion resin composition.

The aqueous coating composition includes 10 to 50 parts by weight of the acrylic emulsion resin composition, 30 to 60 parts by weight of silica sand having a particle size of 50 to 150 mesh, and 5 to 30 parts by weight of talc.

When the quantity of the said acrylic emulsion resin composition is less than 10 weight part, adhesiveness with a to-be-coated object, abrasion resistance of a dry coating film, and water resistance become poor. When the amount of the acrylic emulsion resin composition is more than 50 parts by weight, hiding power is reduced and wear resistance is poor. Therefore, it is preferable that the said aqueous coating composition contains 10-50 weight part of acrylic emulsion resin composition.

When the amount of silica sand having a particle size of 50 to 150 mesh is less than 30 parts by weight, the anti-slip effect is inferior, and if it is more than 60 parts by weight, coagulation of silica occurs, resulting in appearance defects and poor adhesion. Precipitation of silica may occur. The silica sand prevents the sliding of the paint.

If the amount of talc is less than 5 parts by weight, the hardness of the coating film is lowered, and if it is more than 30 parts by weight, there is a problem in that the adhesive strength falls. Therefore, the content of the talc is preferably 5 to 30 parts by weight.

The aqueous coating composition may further include a pigment for color impartment. Examples of the pigment include talc as an organic azo pigment or a extender pigment. The pigments are preferably used because they are not harmful pigments such as lead, cadmium, and chromium. The use ratio of the said organic azo pigment and talc is preferably titanium dioxide (rutile): talc = 1 to 10: 10 to 30.

If the amount of the pigment in the aqueous coating composition is less than 10 parts by weight, wear resistance is poor. When the amount of the pigment in the aqueous coating composition is more than 40 parts by weight, the dispersibility and the like of the adhesive pigment of the dry coating film deteriorate. Thus, the aqueous coating composition contains 10 to 40 parts by weight of the pigment.

The aqueous coating composition may further include a dispersant. The dispersant ensures water resistance, abrasion resistance, adhesion, chemical resistance and paint storage property and dispersion stability with pigments, fillers and the like of the coating film.

Examples of the dispersant include monophosphate ester dispersants, polyphosphate ester dispersants, modified silicone dispersants, and the like. In view of dispersion stability, the modified silicone dispersant is most preferred.

The amount of the dispersant used is preferably 0.1 to 1 part by weight. When the amount of the dispersant added is less than 0.1 part by weight, the pigment is poorly dispersed and wear of the coating film easily occurs, and the viscosity of the paint is increased due to the aggregation of the pigment during storage. When the usage-amount of the said dispersing agent is more than 1 weight part, water resistance, adhesiveness, and abrasion resistance become poor.

The aqueous coating composition may further include an alcohol solvent. The alcohol solvent can speed up the drying characteristics of the paint. Examples of the alcohol solvent include methyl alcohol, ethyl alcohol, isopropyl alcohol and the like.

The alcohol solvent is added in an amount of 1 to 5 parts by weight in consideration of drying characteristics and freezing stability of the aqueous coating composition.

Hereinafter, the present invention will be described in detail through specific examples.

Preparation of Acrylic Emulsion Resin Composition

<Example 1>

A thermometer, a condenser, a stirrer, and a temperature raising device were attached to a 5 L four-necked glass flask. Here, 800 g of deionized water and 1.5 g of ammonium bicarbonate were added for the buffer, and the temperature was increased to 80 ° C. In a separate vessel, 434 g of deionized water, 20 g of sodium dodecylbenzenesulfonate, 335 g of methyl methacrylate, 481 g of styrene, 520 g of butyl acrylate, 30 g of fumaric acid ester, and 10 g of methacrylic acid were added thereto, followed by stirring to obtain an emulsion. 40.4 g of the emulsion was added to a flask, 4.2 g of ammonium persulfate was dissolved in 50 g of deionized water, and then introduced into a reactor to synthesize a seed polymer. Then, 1789.6 g of the remaining emulsion was added dropwise to the flask uniformly for 3 hours to perform emulsion polymerization. . The pH of the reactant was adjusted to 9 by adding 8.5 g of ammonia to the synthesized emulsion. The nonvolatile content of the emulsion resin thus synthesized was 50.1%, the viscosity was 220 cps, and the glass transition temperature was 21.4 ° C.

Comparative Example 1

A 5-liter four-necked glass flask was attached with a thermometer, a condenser, a stirrer, and a temperature raising device. 800 g of deionized water and 1.5 g of ammonium bicarbonate were added thereto, and the temperature was increased to 80 ° C. In a separate vessel, 434 g of deionized water, 20 g of sodium dodecylbenzenesulfonate, 335 g of methyl methacrylate, 481 g of styrene, 520 g of butyl acrylate, and 10 g of methacrylic acid were added thereto, followed by stirring to obtain an emulsion. 40.4 g of the emulsion was added to a flask, 4.2 g of ammonium persulfate was dissolved in 50 g of deionized water, added to the reactor to synthesize a seed polymer, and then emulsion polymerization was performed by dropping the remaining 1759.6 g of the emulsion uniformly into the flask for 3 hours. The pH of the reactant was adjusted to 9 by adding 8.5 g of ammonia water to the synthesized emulsion. The nonvolatile content of the emulsion resin thus synthesized was 51.2%, viscosity was 200 cps, and glass transition temperature was 22.14 ° C.

Comparative Example 2

A 5-liter four-necked glass flask was attached with a thermometer, a condenser, a stirrer, and a temperature raising device. 800 g of deionized water and 1.5 g of ammonium bicarbonate were added thereto, and the temperature was increased to 80 ° C. In a separate vessel, 434 g of deionized water, 20 g of sodium dodecylbenzenesulfonate, 825 g of methyl methacrylate, 191 g of styrene, 320 g of butyl acrylate, 30 g of fumaric acid ester, and 10 g of methacrylic acid were stirred to obtain an emulsion. 40.4 g of the emulsion was added to the flask, 4.2 g of ammonium persulfate was dissolved in 50 g of deionized water, added to the reactor to synthesize a seed polymer, and the remaining emulsion was added dropwise to the flask for 3 hours to perform emulsion polymerization. The pH of the reactant was adjusted to 9 by adding 8.5 g of ammonia water to the synthesized emulsion. The nonvolatile content of the emulsion resin thus synthesized was 50.1%, the viscosity was 264 cps, and the glass transition temperature was 49.1 ° C.

Characterization of Acrylic Emulsion Resins

After coating the acrylic emulsion resin composition obtained in each of the above Examples and Comparative Examples, in order to determine the properties of the coating film, using the acrylic emulsion resin composition obtained in Example 1 and Comparative Examples 1 to 2, an aqueous coating material for flooring The compositions were prepared as in Example 2, Comparative Example 2 and Comparative Example 3. Table 1 shows the composition ratio of the flooring paint.

Raw material name Example 2 Comparative Example 3 Comparative Example 4 Resin of Example 1 55.22 - - Resin of Comparative Example 1 - 55.22 - Resin of Comparative Example 2 - - 55.23 Deionized water 9.47 9.47 8.20 antiseptic 0.32 0.32 0.32 Dispersant 0.67 0.67 0.67 Antifoam 0.32 0.32 0.32 Preparation 2.05 2.05 3.31 Titanium dioxide 7.89 7.89 7.89 Talc 23.67 23.67 23.67 Adhesion promoter 0.32 0.32 0.32 Thickener 0.13 0.13 0.13 Sum 100.00 100.00 100.00

The trade names of the materials used above are as follows.

Preservative: B-95 of Sunkyung Co., Ltd.

Defoamer: BYK-024 from BYK-Chemie GmbH, Germany

Preparation: Texanol from Eastman Chemical Company

Adhesion Promoter: Z-6040 by Dow Corning Corporation

Thickener: ER-4400 from U.C.C.

The result of the characteristic test of each coating composition shown in Table 1 is shown in Table 2.

Paint property Example 2 Comparative Example 3 Comparative Example 4 State (KU) 77 75 79 Water resistance clear clear clear Alkali resistance clear clear clear Freezing Stability 2 3 3 Thermal stability (led change) 3 3 2 Bleeding clear clear Bad Adhesion Great usually Great

In Table 2, the characteristic test for each item was performed according to the Korean Industrial Standard KS M 5340.

From the above result, Example 2 using the resin of Example 1 which introduce | transduced the acryl-type monomer for adhesion promotion than the comparative example 3 which applied the resin of the comparative example 1 was excellent in adhesiveness, and the bleeding phenomenon did not generate | occur | produce.

In addition, as a result of the experiment of Comparative Example 4 applying the resin of Comparative Example 2 in which the glass transition temperature of the emulsion resin is greater than 40 ° C, the bleeding phenomenon occurred due to an increase in the dosage of the coating agent used for forming the coating film.

Preparation of Aqueous Paint Composition

Example 3

50 g of the acrylic emulsion resin composition obtained in Example 2, 48.8 g of silica sand having an average particle size of 90 mesh, and 1.2 g of a colorant (aqueous color exclusive to Dipisa Co., Ltd.) were mixed to obtain 100 g of an aqueous coating composition.

Example 4

39 g of the acrylic emulsion resin composition obtained in Example 2, 59.8 g of silica sand having an average particle size of 90 mesh, and 1.2 g of a colorant were mixed to obtain 100 g of an aqueous coating composition.

Comparative Example 5

23.8 g of the acrylic emulsion resin composition obtained in Example 2, 75 g of silica sand having an average particle size of 90 mesh, and 1.2 g of a colorant were mixed to obtain 100 g of an aqueous coating composition.

Comparative Example 6

The one-component urethane flooring material was tested as a comparative example. As a one-component urethane flooring material, singlet (nose paint), which is a one-component moisture-curable flooring material manufactured by DIPIY, was used.

Table 3 shows the composition ratios of the paints of Examples 3 and 4 and Comparative Example 5.

Raw material name Example 3 Example 4 Comparative Example 5 Example 2 50 39 23.8 Silica (average grain size 90 mesh) 48.8 59.8 75.0 coloring agent 1.2 1.2 1.2 Sum 100.0 100.0 100.0

Experimental Example

The properties of the aqueous coating compositions obtained in Examples 3 and 4 and Comparative Examples 5 and 6 were measured. Characteristic test for each item The characteristic test for each item was conducted according to Korean Industrial Standard KS M 5340.

Paint property Example 3 Example 4 Comparative Example 5 Comparative Example 6 Nonvolatile matter 78.3 83 90 90 State (KU) 85 95 120 100 Slip resistance usually Great Great usually Water resistance clear clear clear clear Alkali resistance clear clear clear clear Wear resistance 405 mg 450mg 650 mg 150 mg Pollution resistance clear clear Bad usually Workability (roller) Great Great Bad Bad Freezing Stability 2 2 2 3 Thermal stability (led change) 3 3 2 3 Bleeding clear clear clear usually Adhesion Great Great Bad Bad

In Table 5, the characteristic test for each item was performed according to the Korean Industrial Standard KS M 5340. As can be seen from Table 5, the coating compositions obtained in Examples 3 to 4 were excellent in fouling resistance, workability, bleeding and adhesion, whereas the coating compositions obtained in Comparative Examples 5 to 6 were stain resistant, working The property is normal or poor and the adhesion is poor.

As described above, the coating composition according to the present invention is excellent in wear resistance, water resistance, durability, storage stability, and in particular, excellent adhesion to asphalt-based coatings. By introducing silica sand having a particle size of 50 to 150 in the coating composition, it is possible to improve the anti-slip effect. In addition, since it contains almost no petroleum-based solvent used in conventional floor paints, environmental pollution can be prevented.

Although the present invention has been described above according to an embodiment of the present invention, it will be apparent to those skilled in the art that various modifications may be made without departing from the spirit of the present invention.

Claims (9)

30 to 70 parts by weight of acrylic ester monomer, 10 to 50 parts by weight of at least one aromatic vinyl monomer selected from the group consisting of α-methylstyrene, trans-β-methylstyrene, β-methylstyrene and 4-methylstyrene, fumaric acid Preparing a monomer mixture comprising 1 to 10 parts by weight of an acryl-based monomer for adhesion promotion comprising an ester or methacrylamide modified substance and 0.5 to 4 parts by weight of an organic acid monomer; Preparing an addition polymerization mixture by mixing 10 to 60 parts by weight of the monomer mixture, 0.2 to 5 parts by weight of surfactant and 0.1 to 1 part by weight of a radical polymerization initiator catalyst; And Method of producing an acrylic emulsion resin composition applied to the water-based coating for flooring comprising the step of adjusting the pH of the addition polymerization mixture to 7 to 10 using the pH adjusting agent. The method of claim 1, wherein the acrylic ester monomer is methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, normal butyl methacrylate, isobutyl methacrylate, lauryl methacrylate, stearyl methacrylate A method of producing an acrylic emulsion resin composition to be applied to a waterborne paint for flooring, characterized in that at least one selected from the group consisting of acrylate, butyl acrylate, beta-hydroxybutyl methacrylate and di (ethylene glycol) monomethacrylate. delete delete The method of claim 1, wherein the organic acid monomer is at least one selected from the group consisting of acrylic acid, methacrylic acid, fumaric acid, maleic acid and itaconic acid. According to claim 1, wherein the step of adjusting the pH of the addition polymerization mixture to 7 to 10 ammonia water, monoethanolamine, diethanolamine, triethanolamine, 1-amino-2-methylpropane, 2-amino-2-methyl A process for producing an acrylic emulsion resin composition applied to a waterborne paint for flooring, characterized in that it is carried out using a pH adjuster selected from the group consisting of propane and triethylamine. The method for producing an acrylic emulsion resin composition according to claim 1, wherein the glass transition temperature of the acrylic emulsion resin composition is 10 to 40 ° C. 30 to 70 parts by weight of acrylic ester monomer, 10 to 50 parts by weight of at least one aromatic vinyl monomer selected from the group consisting of α-methylstyrene, trans-β-methylstyrene, β-methylstyrene and 4-methylstyrene, fumaric acid Preparing a monomer mixture comprising 1 to 10 parts by weight of an acryl-based monomer for adhesion promotion comprising an ester or methacrylamide modified substance and 0.5 to 4 parts by weight of an organic acid monomer; Preparing an addition polymerization mixture by mixing 10 to 60 parts by weight of the monomer mixture, 0.2 to 5 parts by weight of surfactant and 0.1 to 1 part by weight of a radical polymerization initiator catalyst; And It is formed by adjusting the pH of the addition polymerization mixture to 7 to 10 by using the PH regulator, the acrylic emulsion resin applied to the waterborne coating for flooring, characterized in that the glass transition temperature is 10 to 40 ℃. 10 to 50 parts by weight of the acrylic emulsion resin composition of claim 8; 30 to 60 parts by weight of silica sand having a particle size of 50 to 150 mesh; And An aqueous coating composition for flooring comprising 5 to 30 parts by weight of talc.