KR20010048010A - Water paint composition and producing method thereof - Google Patents

Abstract

PURPOSE: Provided are an aqueous paint composition and its preparation method, which is improved in the water proof, the cracking prevention and the lifetime. CONSTITUTION: The aqueous paint composition 45-55 wt% of a resin emulsion which comprises 39-41 wt% of monomer mixture comprising ethyl acrylate, methyl methacrylate and isobutoxy methylol methacrylate in the ratio of 55:40:5 by weight, 55-57 wt% of a distilled water, 0.07-0.09 wt% of ammonium persulfate and 3.5-4.5 wt% of a surfactant; 27-33 wt% of calcium carbonate; 0.4-0.5 wt% of a dispersing agent; 8-12 wt% of a pigment; 0.2-0.3 wt% of petroleum; 9-10 wt% of zinc oxide; 0.2-0.3 wt% of a sterilizing agent; 0.4-0.5 wt% of paraffin chloride; 0.2-0.3 wt% of liquid ammonia; 0.2-0.3 wt% of a preservative; 0.2-0.3 wt% of a thickener; a small amount of water. Preferably the surfactant is aerosol A-102, and the pigment is TiO2.

Description

Water paint composition and manufacturing method thereof

The present invention relates to a paint composition, and more particularly, to an aqueous paint composition using water as a medium and a method for producing the same.

With the use of oil paints, the environmental pollution problem caused by the organic solvent added to the oil paint composition has become serious, to prepare and use an aqueous paint using water as a medium, interest in water paints is increasing day by day.

In order to manufacture an aqueous paint, an aqueous emulsion resin is used as a basic resin, and the basic resin in an aqueous paint composition is present in water in the form of particles.

The resin emulsion, the main raw material used in the aqueous paint composition, is a direct emulsion method in which particles of a basic resin are directly formed in water by emulsion polymerization or suspension polymerization, or an indirect emulsion in which a basic resin particle is formed in a solvent and then transferred to an aqueous phase. Manufactured by law.

Using the resin emulsion prepared by the above methods as a base material, various physical properties adjusting ingredients are added to prepare an aqueous paint composition.

Such an aqueous paint composition can prevent environmental pollution by reducing the use of organic solvent by using water as a medium, as well as excellent appearance and low cost.

However, conventionally used water-based paint composition is a problem that the water is soaked when the paint is applied due to the low water resistance, especially when painted on the outer wall of the concrete building is more serious. In addition, there is a problem that a crack occurs on the surface after painting.

Due to the above problems, the water-based paint has a serious problem that its life is shorter than the oil-based paint.

The present invention for solving the above problems is to provide a water-based paint that is excellent in water resistance and crack formation prevention properties as well as significantly reducing the use of organic solvents by using water as a medium.

The present invention for achieving the above object is (a) ethyl acrylate (methyl acrylate), methyl methacrylate (methyl methacrylate) and isobutoxy methylol methacrylate (iso-butoxy methylol methacrylate) 55: 40: 5 Preparing a monomer mixture by mixing in a weight ratio of; (b) adding distilled water and ammonium persulfate to the reactor and adding 66 weight of the surfactant used in the resin emulsion; (c) introducing nitrogen into the reactor to remove charges in the reactor; (d) placing the reactor from which the charge has been removed into a heated electrolyzer and heating to 55-65 ° C .; (e) adding 10 of the monomer mixtures to initiate the reaction while stirring the reactor at a temperature of 55-65 ° C .; (f) adding the remaining monomer mixture dropwise at 55-65 ° C. over 3 hours when the reaction is initiated; (g) stirring the mixture at 55-65 ° C. for 1 hour-1 hour 30 minutes; (h) adding the remaining surfactant to the mixture; (i) preparing a resin emulsion comprising 39-41 weight of monomer mixture, 55-57 weight of distilled water, 0.07-0.09 weight of ammonium persulfate and 3.5-4.5 weight of surfactant, including cooling and filtering the emulsion; ; Adding a small amount of water, calcium carbonate and a dispersant to the resin emulsion and stirring for 30 minutes; Adding the remaining resin emulsion to the stirred mixture; Adding a pigment, petroleum, zincated, sterilizing agent, paraffin chloride, ammonia water, preservative and thickener to the mixture; Stirring the mixture again for 1 hour-1 hour 30 minutes to form a composition; Grinding the stirred composition to homogenize the particles; 45-55 weight of resin emulsion, 27-33 weight of calcium carbonate, 0.4-0.5 weight of dispersant, 8-12 weight of pigment, 0.2-0.3 weight of petroleum, galvanization 9-10, including removing air from the pulverized composition. Weight, sterilant 0.2-0.3 weight, paraffin chloride 9-10 weight, ammonia water 0.2-0.3 weight, preservative 0.2-0.3 weight, thickener 0.2-0.3 weight, and a method for producing an aqueous paint composition comprising a small amount of water. .

In addition, the present invention 39-41 weight of monomer mixture, 55-57 weight of distilled water, ammonium persulfate 0.07-0.09 45-55 weight of the resin emulsion, including the weight and 3.5-4.5 weight of the surfactant; Calcium carbonate 27-33 weight; 0.4-0.5 weight of dispersant; Pigment 8-12 weight; 0.2-0.3 weight of petroleum; Galvanization 9-10 weight; Sterilant 0.2-0.3 weight; Paraffin chloride 9-10 weight; 0.2-0.3 weight of ammonia water; An aqueous paint composition comprising 0.2-0.3 weight of preservative, 0.2-0.3 weight of thickener and small amount of water.

Hereinafter, the present invention will be described in detail.

As raw materials for preparing the aqueous paint composition of the present invention, resin emulsion, calcium carbonate, and pigments are used as main components, and other components include petroleum, zinc, sterilizing agents, paraffin chloride, preservatives, ammonia water, dispersants, and thickeners.

First, a resin emulsion which is a main raw material of an aqueous paint composition is prepared by the following method.

Ethyl acrylate, methyl methacrylate and isobutoxy methylol methacrylate (hereinafter referred to as "IBMA") are used as monomers used as raw materials for the resin emulsion.

A monomer mixture is prepared by mixing ethyl acrylate: methyl methacrylate: IBMA in a weight ratio of 55: 40: 5. As for the monomer mixture, it is preferable to use 39-41 with respect to the total weight of the resin emulsion manufactured, and it is especially preferable to use 39.97 weight.

Distilled water, ammonium persulfate and a surfactant are added to the reactor and nitrogen is flowed to remove the charge in the reactor. At this time, it is preferable to let nitrogen flow about 15 minutes. The charged reactor is placed in a heated electrolyzer and heated to 55-65 ° C.

At this time, it is preferable to use 55-57 weight, and it is especially preferable to use 55.95 weight with respect to the gross weight of the resin emulsion to produce distilled water. It is preferable to use 0.07-0.09 weight with respect to the total weight of the resin emulsion manufactured, and it is especially preferable to use 0.08 weight as ammonium persulfate. Ammonium persulfate acts as a catalyst (oxidant) to induce the reaction of the monomer mixture.

It is preferable to use 3.5-4.5 weight with respect to the total weight of the resin emulsion manufactured, and it is especially preferable to use 4.0 weight of surfactant at the time of preparation of resin emulsion. 66 of the surfactants used in the preparation of the resin emulsion are used in this step. It is preferable to use aerosol A-102 (product of American Cyanamid Company) of 31 weight concentration as surfactant.

When the temperature of the reactor reaches 55-65 ° C., preferably 60 ° C., about 10 of the total monomer mixtures to be used are stirred first while the reactor is stirred to wait for the start of the reaction. At this time, it is preferable to stir at a speed of 250rpm, the start of the reaction can be confirmed through the occurrence of blue color development or a slight exotherm in the reaction mixture. When the reaction is initiated, the remaining monomer mixture is added dropwise at 55-65 ° C., preferably at 60 ° C. over 3 hours. After adding all the monomer mixture, the mixture was stirred again at 55-65 ° C. for 1 hour to 1 hour 30 minutes.

After stirring, the remaining surfactant is added. After adding the surfactant, the emulsion is cooled and filtered to complete the resin emulsion.

A small amount of water, calcium carbonate and a dispersant are sequentially added to the resin emulsion prepared as described above and stirred. In this case, the resin emulsion preferably has a weight of 45-55 to the paint composition, and particularly preferably 50 weight. Only about 20 of the total amount of the resin emulsion to be used is used in this step, and stirring is preferably about 30 minutes.

Calcium carbonate is a material used to prevent bleeding of the produced paint. It is preferable to use 27 to 33 weights, and particularly preferably 30 weights to the paint composition to be produced.

The dispersant is a material used for uniformly dispersing physical properties by uniformly dispersing the particles in the paint composition to be produced, and it is preferable to use 0.4-0.5 weight, and particularly preferably 0.48 weight based on the paint composition to be produced. .

The remaining resin emulsion is added to the stirred mixture again, and pigments and other components such as petroleum, zincated, sterilizer, paraffin chloride, ammonia water, preservatives and thickeners are added.

Pigments are used to impart color to the paint, and it is preferable to use titanium dioxide (TiO ₂ ), which is a white pigment having excellent hiding power. In addition, it is preferable to use 8-12 weight, and it is especially preferable to use 10 weight with respect to the paint composition manufactured.

Among other components, petroleum is a material used to control the speed at which the paint is dried after the paint is applied, and it is preferable to use 0.2-0.3 weight with respect to the paint composition to be produced, and particularly preferably 0.24 weight.

Zincation is a material used to impart resilience to the paint component, and it is preferable to use 9-10 weight, and particularly preferably 9.5 weight based on the paint composition to be produced.

Paraffin chloride is also a material used to control the elasticity of the paint, and it is preferable to use 0.9-1 weight, particularly preferably 0.95 weight based on the paint composition to be produced.

A sterilizer is a substance used to prevent the growth of bacteria such as mold on the paint composition or after painting. It is preferable to use 0.2-0.3 weight with respect to the paint composition to be produced, and particularly preferably 0.24 weight. Do.

Ammonia water is a material used to enhance the stability of the product and to adjust the physical properties by assisting the dispersant, it is preferable to use 0.2-0.3 weight, particularly preferably 0.24 weight based on the paint composition to be produced.

Preservatives are used to increase the shelf life of the product, it is preferable to use 0.2-0.3 weight, particularly preferably 0.24 weight based on the paint composition to be produced.

The thickener is a material used to adjust the viscosity of the product, it is preferable to use 0.2-0.3 weight, particularly preferably 0.24 weight based on the paint composition to be produced.

The mixture to which the above substances are added is stirred again for 1 hour-1 hour 30 minutes to uniformly mix and disperse each component.

After stirring, the composition is ground to more uniformly mix the particles of the composition and impart elasticity to the composition. For milling, it is preferable to use a mill. When the grinding is completed, air is removed from the ground composition to complete the paint composition.

The present invention will be described in detail through the following examples. The following examples, however, illustrate the invention and do not limit the scope of the invention.

(Example 1)

4.1 kg of a monomer mixture was prepared by mixing 2.255 kg of ethyl acrylate, 1.640 kg of methyl methacrylate, and 0.205 kg of IBMA.

150 g of distilled water, 0.2 g of ammonium persulfate, and 178.24 g of 31 concentration of aerosol A-102 were injected with nitrogen for 15 minutes to remove the charge in the reactor, and the reactor was removed from the charged cell and heated to 60 ° C. It was.

When the temperature of the reactor reached 60 ° C., 0.41 kg of the monomer mixture was added while rotating the stirrer at a speed of 250 rpm to wait for the start of the reaction, and when the reaction started, the remaining monomer mixture was added dropwise at 60 ° C. over 3 hours. . After adding all of the monomer mixture, the mixture was stirred again at 60 ° C. for 1 hour.

91.82 g of aerosol A-102 at 31 concentration was added, then cooled and filtered to prepare a resin emulsion.

A small amount of water, 6.3 kg of calcium carbonate, and 100 g of a dispersant were sequentially added to 2 kg of the prepared resin emulsion, followed by stirring for 30 minutes.

To the stirred mixture, 8.05 kg of resin emulsion was further added, followed by 2.1 kg of titanium dioxide, 50 g of petroleum, 2 kg of zinc, 2 g of sterilant, 200 g of paraffin chloride, 50 g of ammonia water, 50 g of preservative, and 50 g of thickener.

The mixture to which the above substances were added was stirred again for 1 hour and 10 minutes to uniformly mix and disperse each component, and then pulverized the particles using a dino mill.

After the pulverization was completed, air was removed from the pulverized mixture using a deaerator to complete 21 kg of the paint composition.

(Example 2)

The physical properties of the paint composition prepared in Example 1 were tested, and the results are shown in Table 1 below.

Item Result The tensile strength 30kgf / cm3 Elongation 235 Dry coating state clear Nonvolatile matter 61 Pigment 37 Softness 6NS importance 1.34 lead 88 Ku Concealment 0.92 Repainting test clear Weathering resistance clear Absorption amount 0.3 g Water resistance clear

(Example 3)

It is shown in Table 2 below by comparing the physical properties of the paint composition of the present invention prepared in Example 1 with the physical properties of conventional water-based paints.

Item Water-based paint composition of the present invention Conventional Aqueous Paint Composition The tensile strength △ ○ Elongation ○ × Dry coating state clear clear Nonvolatile matter ○ △ Pigment △ △ Softness △ △ Concealment △ △ Absorption amount ○ × Water resistance ○ ×

In Table 2, ○ is excellent, △ is usually, x represents a failure.

As can be seen from the above results, the aqueous paint composition of the present invention is slightly lower in terms of tensile strength than the conventional aqueous paint composition, it can be seen that the elongation, water absorption and water resistance is very excellent.

The water-based paint composition of the present invention as described above is water-based can not only significantly reduce the use of organic solvents, but also can be used for the exterior wall of the concrete building to achieve a perfect waterproof and crack prevention effect, such waterproof and crack prevention The effect extends the life of the aqueous paint.

In addition, a variety of color combinations can be made easily, especially cold resistance, water resistance and adhesion is excellent effect.

Claims (6)

(A) ethyl acrylate (methyl methacrylate) and isobutoxy methylol methacrylate (iso-butoxy methylol methacrylate) in a weight ratio of 55: 40: 5 mixed to prepare a monomer mixture Steps; (b) adding distilled water and ammonium persulfate to the reactor and adding 66 of the surfactant used in the resin emulsion; (c) introducing nitrogen into the reactor to remove charges in the reactor; (d) placing the reactor from which the charge has been removed into a heated electrolyzer and heating to 55-65 ° C .; (e) adding 10 of the monomer mixtures to initiate the reaction while stirring the reactor at a temperature of 55-65 ° C .; (f) adding the remaining monomer mixture dropwise at 55-65 ° C. over 3 hours when the reaction is initiated; (g) stirring the mixture at 55-65 ° C. for 1 hour-1 hour 30 minutes; (h) adding the remaining surfactant to the mixture; (i) cooling and filtering the emulsion, Preparing a resin emulsion comprising 39-41 weight of the monomer mixture, 55-57 weight of distilled water, 0.07-0.09 weight of ammonium persulfate and 3.5-4.5 weight of surfactant; Adding a small amount of water, calcium carbonate and a dispersant to the resin emulsion and stirring for 30 minutes; Adding the remaining resin emulsion to the stirred mixture; Adding a pigment, petroleum, zincated, sterilizing agent, paraffin chloride, ammonia water, preservative and thickener to the mixture; Stirring the mixture again for 1 hour-1 hour 30 minutes to form a composition; Grinding the stirred composition to homogenize the particles; Removing air from the pulverized composition, Resin emulsion 45-55 weight, calcium carbonate 27-33 weight, dispersant 0.4-0.5 weight, pigment 8-12 weight, petroleum 0.2-0.3 weight, zincation 9-10 weight, sterilant 0.2-0.3 weight, paraffin chloride 9-10 A process for producing an aqueous paint composition comprising a weight, 0.2-0.3 weight of ammonia water, 0.2-0.3 weight of preservative, 0.2-0.3 weight of thickener and a small amount of water. The method for producing an aqueous paint composition according to claim 1, wherein aerosol A-102 at a concentration of 31 weight is used as the surfactant. The method for producing an aqueous paint composition according to claim 1, wherein titanium dioxide (TiO ₂ ), which is a white pigment, is used as the pigment. 39-41 weight of monomer mixture which mixed ethyl acrylate, methyl methacrylate, and isobutoxy methylol methacrylate in the weight ratio of 55: 40: 5, 55-57 weight of distilled water, 0.07-0.09 weight of ammonium persulfate, and surfactant 45-55 weight of resin emulsion including 3.5-4.5 weight; Calcium carbonate 27-33 weight; 0.4-0.5 weight of dispersant; Pigment 8-12 weight; 0.2-0.3 weight of petroleum; Galvanization 9-10 weight; Sterilant 0.2-0.3 weight; Paraffin chloride 9-10 weight; 0.2-0.3 weight of ammonia water; An aqueous paint composition comprising 0.2-0.3 weight preservatives, 0.2-0.3 weight thickener and a small amount of water. 5. The method of claim 4, wherein the surfactant is aerosol A-102. The aqueous paint composition according to claim 4, wherein the pigment is titanium dioxide (TiO ₂ ) which is a white pigment.