KR101053202B1 - A helthy paint composition for antibacterial function and deodorization - Google Patents

Abstract

PURPOSE: Paints for antimicrobial deodorization are provided to adsorb and deodorize harmful materials through diatomite with excellent whiteness and to completely degrade harmful materials through visible light-responsive photocatalyst powder. CONSTITUTION: Paints for antimicrobial deodorization comprises 10~25 weight% of water, 10~30 weight% of acrylic emulsion, 10~20 weight% of white pigment, 10~25 weight% of diatomite having mesopores of 5~20nm, 10~25 weight% of extender pigment, 0.5~3.0 weight% of antibiotic composite materials, 0.1~2.0 weight% of thickening agents, and 1.5~3.0 weight% of additives. The paint further includes 3~10 weight% of a visible light-responsive photocatalyst powder.

Description

Antibacterial and Deodorant Health Paint {A HELTHY PAINT COMPOSITION FOR ANTIBACTERIAL FUNCTION AND DEODORIZATION}

The present invention relates to an antibacterial and deodorant health paint, and more specifically, using a diatomaceous earth having a pore and a visible light responsive photocatalyst powder together, the adsorption and deodorization performance of harmful substances emitted from furniture and wallpaper in the room is very high. Excellent and anti-permanent antibacterial, anti-fungal through the antimicrobial composite material relates to antibacterial, deodorant type health paint.

With economic and industrial development, furniture and wallpaper are diversified, and as quality is improved, the amount of harmful substances such as volatile organic compounds and formaldehyde is increasing. Therefore, indoor air quality is contaminated, and environmental diseases such as atopic dermatitis and rhinitis are increasing. Especially, in case of a new house, a new amount is released and a new house syndrome occurs.

In order to improve indoor air quality, paints showing the performance of deodorizing and adsorbing these harmful substances have been released, but as a deodorizing paint using black charcoal of limited color as a whole, it is applied in advance before the construction of wallpaper due to the appearance problem. The method is limited to the indoor use field, and also has a limited deodorization performance due to the construction behind the wallpaper.

The inventors of the present invention have a pore to solve the above problems, and the adsorption and deodorization of harmful substances using diatomaceous earth with excellent whiteness to produce a variety of colors, by using a visible light responsive photocatalyst powder together for a more perfect deodorizing performance The material was completely deodorized and deodorized, and at the same time, the present invention was completed by using an antimicrobial composite material, which is excellent in antifungal and antimicrobial properties so that indoor air quality is not contaminated by secondary pollution. Therefore, it is an object of the present invention to provide a health coating for antibacterial and deodorant.

In order to achieve the above object, the present invention is 10 to 25% by weight of water, 10 to 30% by weight of acrylic emulsion, 10 to 20% by weight of white pigment, 10 to 25% by weight of diatomaceous earth, 10 to 25% by weight of sieving pigment, antibacterial It provides an antimicrobial deodorant health paint comprising 0.5 to 3.0 wt% of a composite material, 0.1 to 2.0 wt% of a thickener, and 1.5 to 3.0 wt% of an additive.

The present invention may further comprise 3 to 10% by weight of the visible light-responsive photocatalyst powder in the health paint.

The visible light responsive photocatalyst powder contains 95 wt% or more of titanium dioxide, has a specific surface area of 110 to 150 m ² / g, and a particle size of 12 to 16 nm.

The diatomaceous earth preferably has mesopores of 5-20 nm.

The antimicrobial composite material preferably contains at least 1% by weight of silver nanoparticles.

The antimicrobial deodorant health paint of the present invention may exhibit an effect of maintaining a comfortable indoor air quality with excellent adsorption and deodorizing power of the harmful substances, 99% antibacterial and excellent antifungal properties.

The technical terms and scientific terms used in the present invention can be construed as meaning ordinary meanings understood by those of ordinary skill in the art without departing from the scope of the present invention.

The antibacterial and deodorizing paint of the present invention is water 10 to 25% by weight, acrylic emulsion 10 to 30% by weight, white pigment 10 to 20% by weight, diatomaceous earth 10 to 25% by weight, sieving pigment 10 to 25% by weight, antimicrobial composite material 0.5 To 3.0 wt%, thickener 0.1 to 2.0 wt%, and additives 1.5 to 3.0 wt%.

The paint is mainly made up of major elements, minor elements, crude elements and other additives forming the coating film. Among these, the main element which forms a coating film is a binder which plays an important role which shows the basic characteristic of a coating film. It is usually used to emulsify through the synthetic polymerization of the monomers, thereby showing the basic properties of the paint, such as gloss, durability, water resistance, weather resistance and the like. Usually, the interior wall paint is using an acrylic emulsion, and in the present invention, 10 to 30% by weight is used. If the amount is less than 10% by weight, the basic properties of the paint, such as durability, water resistance, adhesion is poor, it can not represent the physical properties of the coating film suitable as a coating, when using an amount of more than 30% by weight relatively less diatomaceous earth content After coating, the diatomaceous earth pores are coated in the emulsion and cannot exhibit proper deodorizing performance.

The white pigment used in the present invention uses the most representative titanium dioxide. Titanium dioxide has the highest refractive index of 2.60 to 2.90 among inorganic pigments, showing the best hiding power, whiteness and coloring power. It is included in an amount of 10 to 20% by weight based on the total weight of the composition, when used in an amount of less than 10% by weight, the concealment rate, whiteness is reduced to lose the function as a paint, using an amount of more than 20% by weight If it does not exhibit the desired effect of the present invention.

Diatomaceous earth, used in the present invention, is a kind of fossil soil in which debris of aquatic single-celled plants, called diatoms, is deposited on the seabed or the seabed. Diatoms are capable of extracting silica from the underwater environment and constructing their own solid framework. Diatomite sedimentary rocks formed by the sedimentation of the diatomaceous skeleton due to its rapid action are mostly composed of hydrous amorphous silica and are produced in large-scale aggregated state. . Diatomaceous earth is divided into freshwater and seawater according to the place where it is deposited. Diatomaceous earth is a porous structure containing about 86 ~ 93% silica, melting point is more than 1400 ℃, stable to general physical chemistry. In other words, diatomaceous earth is a fossil of phytoplankton, and phytoplankton dies and exhales tiny bubbles. Because of the small bubbles, the pores of diatomaceous earth, which are paired for millions of years, have generated pores up to 5,000 times that of activated carbon, and they filter out the particles contaminated by the micropores. Therefore, diatomaceous earth called activated carbon is called a porous body. As described above, micropores of porous materials are classified into micropores having a pore size of 2 nm or less, mesopores of 2 to 50 nm, and macropores of 50 nm or more. It is preferable to use diatomaceous earth having mesopore size pores which exhibits the best adsorption and deodorization performance of heavy substances. The content is used in 10 to 25% by weight, less than 10% by weight is less content per unit area of the diatomaceous earth coating film does not exhibit a perfect deodorizing performance, if more than 25% by weight of the coating film It lowers water resistance and durability.

The extender pigment used in the present invention is a pigment that does not cover the surface to be used to improve the extender of the paint, the coating property of the coating or to adjust the unit price and reduce the gloss, at least one of calcium carbonate, talc and the like. do. Since calcium carbonate is inexpensive and nontoxic in sieving pigments, it is mainly used as a filler in the fields of plastics, paints and rubber. It is also used in building materials, pesticides, medicine and food. There are two kinds of calcium carbonate, which are pulverized natural limestone and chemically synthesized. Usually, heavy calcium carbonate, which is an electron, has a low oil absorption and a large particle size distribution, which is mainly used in paints. Talc is denoted as hydrous magnesium silicate, has a Mohs hardness of 1, soft, generally non-abrasive in which impurities are small, and particulates are widely used in paper-based electric fillers and plastic fillers. Talc has a thin plate-like shape, and when used in paint, it has an effect on the smoothness, adhesion, dry concealment and swelling of the coating. Sieving pigment is included in an amount of 10 to 25% by weight based on the total weight of the composition, when used in an amount of less than 10% by weight of the coating film is less brittleness due to poor workability and can not reduce the gloss of the coating film, If an amount of more than 25% by weight is used, the durability of the coating film is weakened, and the content of diatomaceous earth is relatively low, so that the object effect of the present invention cannot be exhibited.

Antimicrobial composite material used in the present invention is composed of silver nanoparticles and inorganic pigments, the content of the silver nanoparticles is preferably 1% by weight or more, preferably 1 to 2% by weight. Unlike general silver nano antimicrobial agents, the antimicrobial composite material of the present invention is formed of nano composite materials of silver nano particles and inorganic pigments, and exhibits stable and semi-permanent effects even at 30 to 100 ppm silver nano concentration. It is included in an amount of 0.5 to 3.0% by weight based on the total weight of the composition, using an amount of less than 0.5% by weight, the antimicrobial and anti-fungal performance is reduced, the use of more than 3.0% by weight increases the cost compared to performance It presents a problem.

The thickener used in the present invention uses a cellulose derivative-based and a synthetic polyurethane-based thickener. Cellulose derivative thickeners improve the storage stability of paints. Synthetic polyurethane thickeners have high rheological properties, so they have good flowability even at low shear stress. They are good for rollers and brushes, and have a smooth appearance. Have They are used at 0.1 to 2.0% by weight based on the total weight of the paint composition. If the amount of thickener is less than 0.1% by weight, layer separation of the coating occurs during storage, so that stability cannot be secured. The sagging of the film is decreased, so that the coating film does not exhibit a constant thickness and appearance defects occur, and the amount of thickener exceeds 2.0% by weight. In one case, the viscosity of the paint is too high, the workability is lowered, and the durability and water resistance of the coating film are lowered.

Additives used in the present invention are usually used to prepare an aqueous paint, and there are a dispersing agent, an antifreezing agent, an antifoaming agent, a pH adjusting agent, a leveling agent, and a preservative. Such additional additives may be added in amounts of 1.0 to 3.0% by weight. As the dispersant, one or more substances selected from the group consisting of naphthalene sulfonate formalin condensate, melamine sulfonate formalin condensate, polycarboxylic acid compound, polycarboxylic acid ether, aromatic aminosulfonic acid polymer and lignin sulfonic acid may be used. As the cryoprotectant, propylene glycol, ethylene glycol may be used, and as the antifoaming agent, an antifoaming agent of mineral oil, silicone, or other series may be used. In addition, the pH adjusting agent may use 2-amino-2-methyl-1-propenol, the leveling agent may use polyacrylate, modified siloxane, and the preservative may use an isothiazolone system.

In the present invention, although diatomaceous earth is used to adsorb and deodorize harmful chemicals, visible light responsive photocatalyst powder may be used together for more perfect deodorizing performance. Conventional photocatalysts generate free radicals by irradiating ultraviolet ray to ash tar tar, thereby removing indoor harmful chemicals, decomposing pollutants, and antibacterial effects. However, for this performance, sunlight (ultraviolet rays) is not irradiated and sufficient activity cannot be obtained. In the indoor environment, since it is difficult to directly shine sunlight, the effect on photocatalysts is very low. Therefore, in the present invention, by using a visible light responsive photocatalyst powder, it reacts with indoor fluorescent light as well as indoor light (visible light) to completely deodorize harmful chemicals such as volatile organic compounds and formaldehyde. The visible light responsive photocatalyst powder contains 95 wt% or more of titanium dioxide, preferably has a specific surface area of 110 to 150 m ² / g, and a particle size of 12 to 16 nm. The visible light responsive photocatalyst powder is included in an amount of 3 to 10% by weight based on the total weight of the composition, and when used in an amount less than 3% by weight, the deodorizing performance is lowered. Due to the performance, the coating organic binder may be decomposed to cause yellowing.

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the following examples are intended to illustrate the present invention, but the scope of the present invention is not limited thereto.

[Example]

Example 1

16% by weight of water, 25% by weight of synthetic acrylic emulsion, 15% by weight of diatomaceous earth of mesopores, 15% by weight of white pigment, 20% by weight of sieving pigment, 5% by weight of visible light responsive photocatalyst powder, antibacterial 1 wt% of composite material, 0.2 wt% of cellulose thickener, 0.4 wt% of dispersant, 0.3 wt% of antifoam, 1.0 wt% of synthetic polyurethane thickener, 0.5 wt% of leveling agent, 0.1 wt% of pH adjusting agent and 0.5 wt% of preservative By mixing and stirring for 1 hour at 400 ~ 1500RPM to prepare an antibacterial deodorant health paint.

Example 2

Each component was mixed at a compounding ratio as shown in Table 1 to prepare an antimicrobial deodorant health paint in the same manner as in Example 1.

Example 3

Each component was mixed at a compounding ratio as shown in Table 1 to prepare an antimicrobial deodorant health paint in the same manner as in Example 1.

Example 4

Each component was mixed at a compounding ratio as shown in Table 1 to prepare an antimicrobial deodorant health paint in the same manner as in Example 1.

Comparative Example 1

Activated carbon (charcoal) paint, which is commercially available as a deodorizing paint, was used.

number Ingredient Compounding ratio (% by weight) Example 1 Example 2 Example 3 Example 4 One water 16.0 16.0 16.0 16.0 2 Dispersant 0.4 0.4 0.4 0.4 3 Cellulose thickener 0.2 0.2 0.2 0.2 4 White Pigment 15.0 15.0 15.0 15.0 5 Sieving pigment 20.0 20.0 20.0 20.0 6 Mesoporous Diatomite 15.0 20.0 - - 7 Microporous Diatomite - - 15.0 - 8 Giant pore diatomaceous earth - - - 15.0 9 Visible Light Responsive Photocatalyst Powder 5.0 - 5.0 5.0 10 Antifoam 0.3 0.3 0.3 0.3 11 Synthetic acrylic emulsion 25.0 25.0 25.0 25.0 12 Antibacterial Composite Material 1.0 1.0 1.0 1.0 13 Synthetic Polyurethane Thickener 1.0 1.0 1.0 1.0 14 Leveling agent 0.5 0.5 0.5 0.5 15 pH regulator 0.1 0.1 0.1 0.1 16 antiseptic 0.5 0.5 0.5 0.5 Sum 100 100 100 100

Test Example 1

The antimicrobial deodorant health paints prepared in Examples 1 to 4 and Comparative Example 1 were measured for coating properties, antimicrobial and deodorizing performance.

Deodorizing performance is coated with specifications specified on 10cm × 10cm size OHP film based on Gas Bag A and B methods standardized by Korea Photocatalyst Association (AKP). After painting, let stand for 5 days at room temperature (23 ± 5 ℃, RH 65 ± 10%), dry at 60 ℃ for 30 minutes, and then use the sample that has been left for 30 minutes in a desiccator as a test piece. The prepared specimen is placed in a 5 l ted bag and sealed, and 3 l of air is injected. Formaldehyde gas and ammonia gas of about 20ppm were added to the air-injected tedala bag, respectively, and left for 2 hours, and the concentration was measured 2 hours before and after through the detection tube to evaluate the deodorizing performance.

Antimicrobial properties were evaluated by JIS Z 2801 film adhesion method (antibacterial force).

Also, in order to evaluate the basic characteristics of paints, the concealment rate, wash resistance, 45 ° and 0 ° diffusion reflectance and glossiness were evaluated by referring to KS M 6010 Class 2 Class 1 criteria.

Evaluation item result Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Concealment rate (%) 98 98 98 98 99 Wash resistance (500 times) clear clear clear clear clear 45 °, 0 ° Diffuse Reflectance (%) 92 91 92 92 60 Glossiness (85 °) 5 5 5 5 4 Antimicrobiality (%) 99 99 99 99 75 Deodorization performance (%) HCHO 97 85 82 80 78 NH ₃ 94 80 81 80 75

As can be seen from the above experimental results, it can be seen that Example 1 using both diatomaceous earth and visible light responsive photocatalyst powder having mesopores shows the best effect, and the second embodiment of the second embodiment does not use the visible light responsive photocatalyst powder. In case of Example 1, the deodorizing performance was found to be inferior, and Example 3 and Example 4 using the diatomaceous earth having micropores and macropores without using the diatomaceous earth with mesopores showed lower levels of deodorization than Example 1. Performance was shown, but similar to Example 2. In the case of Comparative Example 1 it was confirmed that compared with Examples 1 to 4 inferior in the diffusivity, gloss, antibacterial and deodorizing performance.

The antibacterial and deodorant health paint of the present invention adsorbs and deodorizes harmful substances generated in furniture and walls, and has excellent bio-characteristics such as antimicrobial and antifungal properties with silver nano, so that those who have weak immunity in hospitals, nursing homes, kindergartens, etc. It is expected to have high utilization in various areas such as a space that is frequently used.

Claims (5)

10 to 25% by weight of water, 10 to 30% by weight of acrylic emulsion, 10 to 20% by weight of white pigment, 10 to 25% by weight of diatomaceous earth with mesopores of 5 to 20nm, 10 to 25% by weight of extender pigment, antibacterial Antimicrobial deodorant health paint comprising 0.5 to 3.0% by weight of composite material, 0.1 to 2.0% by weight of thickener and 1.5 to 3.0% by weight of additives. The method of claim 1,
Antibacterial and deodorant health paint further comprises 3 to 10% by weight of the visible light responsive photocatalyst powder. The method of claim 2,
The visible light responsive photocatalyst powder comprises at least 95% by weight of titanium dioxide, specific surface area of 110 ~ 150m ² / g, antimicrobial deodorant health paint, characterized in that the particle size of 12 ~ 16nm. delete 4. The method according to any one of claims 1 to 3,
The antimicrobial composite material is antimicrobial deodorant health paint, characterized in that containing 1% by weight or more silver nanoparticles.