KR101181871B1 - Paint composition for antifungal function and deodorization comprising phytochemical - Google Patents

Abstract

PURPOSE: A paint composition is provided to maintain clean indoor air clean by having excellent deodorizing performance and sterilizing performance, to prevent secondary infection, and to improve lifetime of paint. CONSTITUTION: An Anti-microbial and deodorant paint composition comprises 10-25 weight% of water, 10-30 weight% of acrylic emulsion, 10-20 weight% of white pigment, 10-25 weight% of diatomite having mesopore of 5-20 nm, 10-25 weight% of pigment, 0.5-3.0 weight% of phytochemical obtained from a plant selected from plants consisting of avocado and coriander, 0.1-2.0 weight% of a thickening agent, and 1.5-3.0 weight% of additives.

Description

PATIENT COMPOSITION FOR ANTIFUNGAL FUNCTION AND DEODORIZATION COMPRISING PHYTOCHEMICAL}

The present invention relates to an antimicrobial deodorizing coating composition containing phytochemical, and more particularly, to an antimicrobial deodorizing coating composition containing phytochemical hydrogel nanoparticles including avocado extract and coriander extract. .

With economic and industrial development, furniture and wallpaper are diversified, and as quality is improved, emissions of many volatile organic compounds and formaldehyde, etc. are increasing. In addition, as the furniture or wallpaper is deteriorated, the breeding of bacteria and fungi is actively progressed, which may cause various microbial diseases in the human body.

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 exhibiting these antibacterial and deodorizing and adsorption performances have been released, but as a deodorizing paint using black charcoal with a limited color as a whole, before the construction of wallpaper due to appearance problems It is limited to the field of indoor use by pre-coating, and also has a limited deodorization performance by applying behind the wallpaper.

The present invention has been made to solve the problems of the prior art as described above, the problem to be solved in the present invention is to provide a coating composition having the antibacterial properties as well as the adsorption, deodorization function of the harmful substances in the room.

In order to solve the above problems, 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, diatomaceous earth 10 to 25 having mesopores (mesopore) of 5 to 20nm It provides an antibacterial and deodorizing coating composition comprising a weight%, extender pigment 10 to 25% by weight, phytochemical (0.5 to 3.0% by weight), thickener 0.1 to 2.0% by weight and additives 1.5 to 3.0% by weight.

The coating composition preferably further comprises 3 to 10% by weight of the visible light responsive photocatalyst powder.

The phytochemical is preferably obtained from at least one plant of avocado and coriander.

The phytochemical is preferably at least one of avocado extract and coriander oil.

Preferably, the coriander is a coriandrum sativum.

The coating composition of the present invention uses diatomaceous earth and visible light responsive photocatalyst powder together to have excellent adsorption and deodorization performance of harmful substances emitted from furniture and wallpaper in the room, thereby maintaining a pleasant indoor air quality, and semi-permanent antibacterial activity through phytochemical. It is antifungal and prevents secondary infection, extending the life of paint, increasing the repainting interval and ensuring a healthy interior.

1 shows a process for preparing coriander oil.

There is no other definition in the technical terms and scientific terms used in the present invention, the antimicrobial deodorizing paint composition of the present invention 10 to 25% by weight of water, 10 to 30% by weight of acrylic emulsion, 10 to 20% by weight of white pigment, diatomaceous earth 10 To 25% by weight, sieving pigment 10 to 25% by weight, phytochemical 0.5 to 3.0% by weight, 0.1 to 2.0% by weight thickener and 1.5 to 3.0% by weight of the additive is characterized in that it comprises.

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 paint, 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.

Phytochemicals used in the present invention are also referred to as plant physiologically active nutrients or endogenous plant nutrients. Phytochemical is a compound word of English phyto, meaning plant, and chemical, meaning chemistry. It is also used in the plural form to encompass all kinds of chemicals in plants. This is a concept that refers to all chemicals made from the roots and leaves of the plant, and the plant itself serves to prevent the growth of plants competing with itself or to protect the body from various microorganisms and pests. It is preferable that the phytochemical of this invention has an antibacterial effect. In one preferred embodiment, the phytochemical is preferably obtained from at least one plant of avocado and coriander, and more preferably at least one of avocado extract and coriander oil. desirable. Preferably, the coriander is a coriandrum sativum. The avocado extract may be a water extract of an avocado fruit or an alcohol extract. Preferably ethanol extract. The extraction method is not particularly limited and may be extracted by chromatographic methods commonly used in the art. Extracts from water or alcohol are prepared in powder form after drying under reduced pressure. Coriander oil can be produced by the steam distillation method of coriander (Fig. 1). Avocados and corianders are known to contain phytochemicals with antimicrobial properties, and can exhibit excellent antimicrobial effects when the phytochemical components are used in coating compositions. The picochemical of the present invention is preferably contained in 0.5 to 3.0% by weight of the coating composition, when the content is less than 0.5% by weight does not show a distinct antibacterial effect, when it exceeds 3.0% by weight of the cost increase performance There is 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 rheology and 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 1.5 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, 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 >

Manufacturing example  One

Avocado fruit was ground using a blender. The pulverized product was extracted with hot water using water, dried through a rotary evaporator to obtain an avocado extract in powder form.

Manufacturing example  2

Coriander was steam distilled by the method shown in FIG. 1 to obtain coriander oil.

Example  One

Each component was mixed at a mixing ratio as shown in Table 1 below, and stirred and dispersed at 400 to 1500 RPM for 1 hour to prepare an antibacterial and deodorizing paint.

Example  2

Each component was mixed at a compounding ratio as shown in Table 1 to prepare an antibacterial and deodorizing paint in the same manner as in Example 1.

Comparative example  One

Each component was mixed at a compounding ratio as shown in Table 1 to prepare an antibacterial and deodorizing paint in the same manner as in Example 1.

Comparative example  2

Each component was mixed at a compounding ratio as shown in Table 1 to prepare an antibacterial and deodorizing paint in the same manner as in Example 1.

Comparative example  3

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

Ingredient Compounding ratio (% by weight) Example 1 Example 2 Comparative Example 1 Comparative Example 2 water 16.0 16.0 17.0 17.0 Dispersant ¹⁾ 0.4 0.4 0.4 0.4 Cellulose thickener 0.2 0.2 0.2 0.2 White Pigment ²⁾ 15.0 15.0 15.0 15.0 Extender pigments ³⁾ 20.0 20.0 20.0 20.0 Mesoporous Diatomite 20.0 15.0 20.0 15.0 Visible Light Response Photocatalyst Powder 0 5.0 0 5.0 Antifoam ⁴⁾ 0.3 0.3 0.3 0.3 Synthetic acrylic emulsion 25.0 25.0 25.0 25.0 Phytochemical ⁵⁾ 1.0 1.0 0 0 Synthetic Polyurethane Thickener 1.0 1.0 1.0 1.0 Leveling agent ⁶⁾ 0.5 0.5 0.5 0.5 pH adjuster ⁷⁾ 0.1 0.1 0.1 0.1 Preservative ⁸⁾ 0.5 0.5 0.5 0.5 system 100 100 100 100

1) Naphthalene Sulfonate Formalin Condensate

2) titanium dioxide

3) calcium carbonate

4) Silicone antifoaming agent

5) 50% by weight of avocado extract and 50% by weight of coriander oil

6) polyacrylate

7) 2-amino-2-methyl-1-propenol

8) Isothiazolone

Test Example  One

Using the coating materials of Examples 1 and 2 and Comparative Examples 1 to 3 was measured coating properties, antimicrobial, 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. Introduce about 20ppm of formaldehyde gas and ammonia gas into air-injected tether bag, and leave it for 2 hours, and then measure the concentration of 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 activity).

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 Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Concealment rate (%) 98 98 98 98 99 Wash resistance (500 times) clear clear clear clear clear 45 °, 0 ° Diffuse Reflectance (%) 92 91 92 90 60 Glossiness (85 °) 5 5 5 5 4 Antimicrobiality (%) 99 99 75 74 75 Deodorization performance (%) HCHO 85 97 84 96 78 NH ₃ 82 94 82 95 75

As can be seen from the above experimental results, it was found that Example 2 using both diatomaceous earth and visible light responsive photocatalyst powder and phytochemical having mesopores showed the best effect in deodorizing performance and antibacterial activity.

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 20 nm, 10 to 25% by weight of sieving pigment, avocado An antimicrobial deodorizing coating composition comprising 0.5 to 3.0% by weight of phytochemical obtained from one or more plants of avocado and coriander, 0.1 to 2.0% by weight of thickener and 1.5 to 3.0% by weight of an additive. The method of claim 1,
Antibacterial and deodorizing coating composition further comprises 3 to 10% by weight of the visible light responsive photocatalyst powder. delete 3. The method according to claim 1 or 2,
The phytochemical is antimicrobial deodorizing coating composition, characterized in that at least one of avocado (avocado) extract and coriander (coriander) oil. 3. The method according to claim 1 or 2,
The coriander is an antibacterial and deodorizing coating composition, characterized in that the coriander satium (Coriandrum sativum).

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