KR20160011553A - Antibiosis paint and varnish using soil and pine leaf and manufacturing method thereof - Google Patents

Abstract

The present invention relates to an antibacterial paint using soil and pine needle, which is capable of suppressing environmental pollution, absorbing and desorbing moisture, deodorizing, having an antibacterial function, and adsorbing and decomposing harmful organic compounds. The present invention further relates to a production method thereof. More specifically, provided is an antibacterial paint using soil and pine needle, which comprises 20 wt% of pine needle powder with particle size of 230 mesh, 20 wt% of soil, 15 wt% of an eco-friendly binding material, and 45 wt% of water. In addition, also provided is a production method thereof.

Description

TECHNICAL FIELD [0001] The present invention relates to an antibacterial paint using soil and pine leaf,

The present invention relates to an antimicrobial coating material and a method for producing the same, and more particularly, to an antimicrobial coating material using soil and pine needles for suppressing environmental pollution, moisture absorptive and desorptive, deodorizing, antibacterial and harmful organic compounds.

In the domestic industry, the cement industry is the second largest source of carbon dioxide following the steel industry. When carbon dioxide is blown from calcium carbonate of limestone, which is the main material of cement, it burns a large amount of greenhouse gas in the process of heating to 1,450 ° C and other processes and produces 1 ton of cement statistically until consumption Of the total amount of carbon cement in the world, there is no way to recycle waste cement up to now, which has become a major environmental disaster factor and a major global warming factor.

In addition, sick house syndrome caused by fungi and viruses became a social problem due to the influence of indoor organic matter and indoor humidity. There are many harmful substances such as volatile organic compounds, formaldehyde, carbon dioxide and so on in the new house, causing a sick house syndrome such as atopy, headache, dizziness, nausea, concentration loss and so on.

As this eco-friendly living environment and residential space have increased in interest, interior and exterior materials using chemical substances with little or no toxicity, interior and exterior materials with low emission of chemical substances contained, and interior and exterior materials using natural materials other than chemical materials . In addition, interior and exterior materials with antimicrobial or antimicrobial treatment or pest control have been developed, as well as interior and exterior materials with cooling and heating and humidity control functions. The government has also been promoting the "Health - Friendly Housing Construction Standard (Ministry of Land, Transport and Maritime Affairs Notice No. 2013-612) In particular, Article 5, Paragraph 4, establishes standards for antimicrobial building materials and has been in force since May 2014.

According to the prior art 'Korean Patent Registration No. 10-0811602 (Registered on Mar. 03, 2008), an eco-friendly construction interior material and a method for manufacturing the same, the shell, the quartz stone, the phyllite, the red soil, the loess, Volatile organic compounds (VOCs), which are generated in a large amount in the room, are formed by coloring with spinach powder, paprika oil, wormwood powder, graphite, charcoal, or a mixture thereof, or by coating with silver nano and incense capsules or a mixture thereof. VOC), and formaldehyde, and radiates far-infrared rays, thereby enhancing energy efficiency.

However, although the environmentally friendly construction interior materials such as the above-described prior arts use organic compounds as binders such as binders and adhesives added to make suitable physical properties as an interior material, the harmful substances emitted therefrom still exist, In recent years, there has been a lack of environment-friendly answers to fatal asphyxia in the case of a fire caused by harmful substances generated by combustion of such organic compounds.

In addition, various studies have been conducted on natural finishing materials that have been recently used for most buildings because of their superior ability to control far-infrared ray emissivity, deodorization rate, and humidity compared to other building materials. Korean Patent Publication No. 10-2010-0122735 According to the 'method and composition for soil finishing using environmentally-friendly water repellent agent' (published on November 23, 2010), it is possible to maintain the air permeability of the soil and to prevent moisture, which is the biggest factor that damages the soil finishing material, In order to solve the problems, there is provided an eco-friendly water repellent agent obtained by mixing soybean oil and vegetable oil

However, in the conventional art, the use of the water repellent agent complicates the manufacturing process of the soil finishing material and requires a long period of curing, as well as the problem of insufficient antibacterial, fungicidal or pest control by using vegetable oil having a unique flavor.

Therefore, as a paradigm for the development of new building materials, in recent years there has been a noticeable increase in the quality of life, as well as in interior materials such as floor tiles, adhesives for textiles and wallpaper, various coating agents, There is a need for an environmentally friendly functional interior material that can be applied.

Korean Registered Patent No. 10-0811602 (registered on Mar. 03, 2008) Korean Patent Publication No. 10-2010-0122735 (published on November 23, 2010)

It is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to solve the above-mentioned problems by using an environmentally friendly binder instead of conventional cement as a main raw material of limestone and using pine needles in place of chemical agents for mold removal and antibacterial functions, The present invention also provides an antimicrobial coating using soil and pine leaf which has a moisture-controlling function and removes the fundamental factors of environmental pollution using the soil.

In order to achieve the above object, the antimicrobial coating using soil and pine needle according to the present invention comprises 20 wt% of pine leaf powder having a particle size of 230 mesh or more, 20 wt% of soil having a particle size of 230 mesh or more, 15 wt% Wherein the eco-friendly binder comprises 30 to 40% by weight of vinyl acetate as a monomer, 25 to 30% by weight of butyl acrylate, 15 to 25% by weight of 2-ethylhexyl acrylate, 8 to 16% by weight of acrylic acid, 3-4 wt%; 0.5 to 1% by weight ammonium persulfate as an initiator; 0.3 to 0.6% by weight of sodium dodecyl sulfate as emulsifier; And 0.03 to 0.05% by weight of sodium acetate anhydrous as a buffer, wherein 2 to 8 parts by weight of a urethane-based thickener, 0.5 to 1 part by weight of a silicone-based defoaming agent, and 0.2 to 0.4 parts by weight of propylene glycol as a freezing stabilizer And further comprising an additive.

According to another aspect of the present invention, there is provided a method for preparing an antimicrobial coating material using soil and pine needle, comprising the steps of: preparing 20% by weight of pine needle with a powder having a particle size of 230 mesh or more to prepare an antibacterial filler; Pulverizing 20 wt% of the soil with powder having a particle size of 230 mesh or more to prepare a moisture absorptive and desorptive filler; A monomer mixture comprising 30 to 40 wt% of vinyl acetate, 25 to 30 wt% of butyl acrylate, 15 to 25 wt% of 2-ethylhexyl acrylate, 8 to 16 wt% of acrylic acid and 3 to 4 wt% of divinylbenzene, Preparing 15 wt% of an eco-friendly binder which is an emulsion copolymer comprising 0.5 to 1 wt% of ammonium persulfate, 0.3 to 0.6 wt% of sodium dodecyl sulfate as an emulsifier, and 0.03 to 0.05 wt% of anhydrous sodium acetate as a buffering agent; And mixing 45 wt% of water with the filler and the binder.

The present invention uses a pesticide that has a strong antimicrobial, sterilizing and anti-inflammatory action with a water-soluble environment-friendly binder and does not use a cement binder and an antibacterial agent having a chemical composition. There is an effect to remove.

The present invention also relates to a process for the production of a water-absorbing and deodorizing film which adsorbs and removes volatile organic compounds such as formaldehyde, toluene and ammonia which are generated in building interior materials such as floor tiles, adhesives for textiles and wallpaper, various coating agents, To control the humidity to prevent sick house syndrome.

In addition, the present invention has the advantage of providing high-quality, environmentally friendly functional paints and finishing materials at a low cost by using domestic natural materials without using expensive imported materials, thereby restraining the outflow of foreign currency and reducing costs .

FIG. 1 is a graph showing the results of formaldehyde deodorization test of a test piece prepared using an antimicrobial paint using soil and pine leaves according to the present invention,
FIG. 2 is a graph showing the ammonia gas deodorization test result of a specimen prepared using an antimicrobial paint using soil and pine needle according to the present invention,
FIGS. 3A to 3D are test results of antimicrobial test on Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus strains prepared using antibacterial paints using soil and pine needle according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description of preferred embodiments of the present invention will be given with reference to the accompanying tables and drawings. It should be noted that the same configurations of the drawings denote the same reference numerals as possible whenever possible. Specific details are set forth in the following description, which is provided to provide a more thorough understanding of the present invention. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The antimicrobial paint using soil and pine needle according to the present invention is characterized by comprising 20% by weight of pine needle powder, 20% by weight of earth, 15% by weight of environmentally friendly binder, and 45% by weight of water.

The pine needle used in the antimicrobial paint using soil and pine needle according to the present invention is preferably a powder having a particle size of 230 mesh or more collected in Korea, preferably 20 weight% or more, and the soil is preferably bentonite, zeolite, But it is preferable that the powder is contained in an amount of 20 wt% or more in a powder having a particle size of 230 mesh or more. As used herein,? Is the unit of the number of sheds within 1 cm ² , and 230 mesh represents the particle size corresponding to 230 sheds in 1 cm ² .

The monomer which is one composition of the emulsion copolymer which is an environmentally friendly binder includes vinyl acetate, butyl acrylate, 2-ethylhexyl acrylate, acrylic acid and divinylbenzene, and contains 14 to 16% by weight based on the total weight of the composition desirable.

The monomer is used after removing the polymerization inhibitor. The specific weight ratio of the monomer composition is 30 to 40% by weight of vinyl acetate, 25 to 30% by weight of butyl acrylate, 15 to 25% by weight of 2-ethylhexyl acrylate, By weight to 16% by weight, and divinylbenzene by 3% by weight to 4% by weight.

The butyl acrylate content significantly affects the conversion and the emulsion stability. When the content is less than 25% by weight, not only the physical properties of the hydrophobic butyl acrylate in the copolymer are weakened but also the elongation is decreased, When the content exceeds 30% by weight, the elongation and adhesion are increased but the conversion and emulsion stability are rapidly deteriorated.

On the other hand, when the content of acrylic acid is less than 8% by weight, the adhesive strength is increased, but the polymerization rate and the particle stability are deteriorated, and the emulsion stability is rapidly lowered. On the other hand, if the content exceeds 16% by weight, the conversion rate is good, but the polyvinyl acetate copolymer is often present alone in the particles between the particles and the particles, resulting in a decrease in the overall average molecular weight and a decrease in cohesive force and a decrease in adhesion.

The above-mentioned divinylbenzene is used for enhancing the strength of the coating film. When the content of the divinylbenzene is within the above range, the strength of the coating film can be enhanced while minimizing the use amount.

The (polymerization) initiator which is another composition of the emulsion copolymer for environmentally friendly binder may include ammonium persulfate, sodium persulfate and the like, and ammonium persulfate is particularly useful. At this time, the amount of the initiator is preferably 0.5 to 1% by weight.

If the content of ammonium persulfate is less than 0.5 wt%, the possibility of collision with the monomer at the time of production is low and the conversion rate is relatively low. If it exceeds 1.0 wt%, the polymerization reaction is easily generated by pyrolysis, The surface of the particles is destroyed due to the heat of polymerization, and the intergranular shock is generated. Therefore, in order to obtain an emulsion particle having a small amount of aggregates and a high conversion ratio, it is preferable to limit the content within the above range.

The emulsifier, which is another composition of the emulsion copolymer for the eco-friendly binder, is used for the purpose of making the particles of the polymer extremely fine, and also affects viscosity and storage stability. Examples of the emulsifier include an ionic emulsifier and a nonionic emulsifier. In the present invention, an ionic emulsifier may be used, and sodium dodecylsulfate or sodium laurylsulfate may be used. , Sodium dodecyl sulfate is usefully used. At this time, it is preferable that 0.3 to 0.6% by weight of sodium dodecyl sulfate is added.

When the sodium dodecyl sulfate is 0.3 wt% or less, the particle size is too large. When the sodium dodecyl sulfate is 0.6 wt% or more, the particle size is small but the water resistance is low.

As the other composition of the emulsion copolymer for the eco-friendly binder, anhydrous sodium acetate, which is a weak base, is used. When the pH is changed in the emulsion polymerization, the monomer may not form micelles and may cause aggregation. If the pH is kept constant by using a buffer, it can be prevented. At this time, sodium anhydrous acetic acid is preferably added in an amount of 0.03 to 0.05% by weight.

When the anhydrous sodium acetate is less than 0.03% by weight, the above-mentioned effect is insignificant. When it exceeds 0.05% by weight, the physical properties are affected.

On the other hand, the copolymer emulsion for the eco-friendly binder may be prepared by using ion exchange water. At this time, the ion-exchanged water is 50 to 53% by weight, and the sum of the components including monomer (monomer mixture), initiator, emulsifier and buffer is 47 to 48% by weight.

The reason for using the ion exchange water in the production of the copolymer emulsion for the environmentally friendly binder is not natural water or water, because water quality is one of the most important factors in emulsion polymerization. Natural water and tap water contain polyvalent metal ions. Since these metal ions have the greatest inhibitory factor in the polymerization reaction, it is preferable to use soft water or ion exchange water in the present invention.

Here, although the ion-exchanged water has various roles, it serves as a dispersing medium for the emulsified material, facilitating the transfer of polymerization heat during polymerization and acting as a solvent for emulsifiers, initiators and buffering agents.

Hereinafter, a method for producing an eco-friendly binder for use in an antimicrobial coating using soil and pine needle according to the present invention will be described in detail with reference to an embodiment.

1. Preparation of copolymer emulsion for eco-friendly binder

1-1. Synthesis method

A) Preparation of preemulsions

1) 90 kg of ion exchange water is injected into the reactor.

2) In a separate vessel, 0.05 kg of anhydrous sodium acetate, which is a buffer, is dissolved in 3 kg of ion-exchanged water and added to the reactor of the process 1).

3) In another separate vessel, 0.5 kg of sodium dodecylsulfonate, an emulsifier, is dissolved in 30 kg of ion-exchanged water and added to the reactor.

4) The reactor was charged with 3 kg of vinyl acetate, 6.5 kg of butyl acrylate, 2.8 kg of 2-ethylhexyl acrylate, 1.2 kg of acrylic acid and 0.6 kg of divinylbenzene, and the reactor was heated to 80 ° C., Do it.

5) As the reaction initiator, 0.4 kg of ammonium persulfate is dissolved in 8 kg of ion-exchanged water and the reaction is started while gradually adding thereto.

6) The reaction conversion rate reaches 95% after 20 minutes from the initiation of the reaction.

B) Preparation of emulsion

7) In a separate vessel, 42.0 kg of vinyl acetate, 27.0 kg of butyl acrylate, 23.0 kg of 2-ethylhexyl acrylate, 15.0 kg of acrylic acid and 3.6 kg of divinylbenzene were charged and charged into the reactor after the process of 6) , The temperature of the reactor was raised to 90 ° C, and the mixture was sufficiently stirred for 30 minutes.

8) 0.4 kg of ammonium persulfate, which is a reaction initiator, is dissolved in 8 kg of ion-exchanged water, and the reaction is started while gradually adding.

9) After the process of 8), the reaction is terminated by aging for 60 minutes to polymerize unreacted monomer.

Table 1 below is a property index of a copolymer emulsion for eco-friendly binder used in antimicrobial coatings using soil and pine needle according to the present invention.

2. Preparation of eco-friendly binder

1 " Preparation of Copolymer Emulsion for Eco-friendly Binder ", 3 kg of a urethane-based thickener, 0.7 kg of a silicone-based defoamer and 0.3 kg of propylene glycol as a freezing stabilizer were mixed and sufficiently stirred to prepare an eco-friendly binder. The solids content of the environmentally friendly binder was 49%.

2-1. Comparative Example

3 kg of a urethane-based thickener, 0.7 kg of a silicone-based defoaming agent, and 0.3 kg of propylene glycol as a freezing stabilizer were mixed with 100 kg of polyvinyl acetate and thoroughly stirred to prepare an environmentally friendly binder. The properties of the above-mentioned Examples and Comparative Examples are shown in Table 2 below .

As shown in Table 2, the environmentally friendly binder composition according to the present invention exhibited similar viscosity as the comparative example, but also showed superior bonding strength and water resistance.

Hereinafter, a method for producing an antimicrobial coating material using soil and pine needle according to the present invention will be described in detail with reference to an embodiment.

1. Add 45 wt% water to the agitator

2. Pouring 20 wt% of pine leaf powder over 230 mesh

3. More than 230 mesh soil 20 wt% input

4. High speed dispersion over 1700 RPM for 30 minutes

5. 15% by weight of eco-friendly binder was added, followed by slow stirring for 10 minutes

6. After agitation, after 20 minutes stirring,

Hereinafter, various test results of antibacterial paints using soil and pine needle according to the present invention will be described in detail.

<Experimental Example 1> Deodorizing test

(HCHO) and ammonia (NH 3) according to the KSI-2218 standard with respect to test specimens (width, length 100 mm, thickness 15 mm) produced using the antimicrobial paint using soil and pine needle according to the present invention, ), Respectively, and the test report thereof is shown in Fig. 1 and Fig. 2, respectively.

As shown in FIG. 1 and FIG. 2, the deodorization performance of formaldehyde (HCHO) and ammonia (NH₃) was 85.4% and the deodorization rate of formaldehyde was 100% It is confirmed that there is an excellent effect in removing harmful organic compounds and volatile organic compounds (VOC).

&Lt; Experimental Example 2 >

The antimicrobial function against Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus was analyzed by using the antimicrobial paint using pine needle according to the present invention, and the specimens were prepared in the dimensions of 100 mm in width and 50 mm in thickness. The results are shown in FIGS. .

As shown in FIGS. 3A to 3D, the antimicrobial activity of the antimicrobial coating using the soil and pine needle according to the present invention is due to the antimicrobial and sterilizing anti-inflammatory function by the terpene (phytoncide) component of the pine needle, And 99.9%, respectively, for E. coli, Pseudomonas aeruginosa, and Staphylococcus aureus, respectively, to meet the antimicrobial building material requirements of Article 5 (4) of the Health-Friendly Housing Construction Standard (Ministry of Land, Transport and Maritime Affairs Notice No. 2013-612) Respectively.

As described above, the antimicrobial coating using soil and pine needle according to the present invention adsorbs and decomposes harmful volatile organic compounds generated from strong antimicrobial function and building interior materials, and performs moisture absorption / Can be prevented.

The antimicrobial coating using soil and pine needle according to the present invention uses an environmentally friendly binder instead of cement and uses pine needles instead of chemical agents for mold removal and antimicrobial function and adsorbs and decomposes harmful volatile organic compounds By using soil with moisture control function as moisture absorptive and desorptive function, it is possible to reduce the environmental pollution caused by carbon dioxide emission and the fundamental factor of global warming.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of various modifications within the scope of the invention. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

Claims (2)

20 wt% of a pine needle powder having a particle size of 230 mesh or more, 20 wt% of soil, 15 wt% of an environmentally friendly binder, and 45 wt%
The environment-
30 to 40% by weight of vinyl acetate, 25 to 30% by weight of butyl acrylate, 15 to 25% by weight of 2-ethylhexyl acrylate, 8 to 16% by weight of acrylic acid and 3 to 4% by weight of divinylbenzene as monomers;
0.5 to 1% by weight ammonium persulfate as an initiator;
0.3 to 0.6% by weight of sodium dodecyl sulfate as emulsifier; And
0.03 to 0.05% by weight of anhydrous sodium acetate as a buffer,
An antimicrobial coating material using soil and pine needle, characterized by further comprising 2 to 8 parts by weight of a urethane-based thickener, 0.5 to 1 part by weight of a silicone-based defoaming agent, and 0.2 to 0.4 parts by weight of propylene glycol as a freezing stabilizer, based on 100 parts by weight of the environmentally- .
Pulverizing 20% by weight of pine needle into powder having a particle size of 230 mesh or more to prepare an antimicrobial filler;
Preparing 20 wt% of soil having a grain size of 230 mesh or more with a moisture absorptive and desorptive filler;
A monomer mixture comprising 30 to 40 wt% of vinyl acetate, 25 to 30 wt% of butyl acrylate, 15 to 25 wt% of 2-ethylhexyl acrylate, 8 to 16 wt% of acrylic acid and 3 to 4 wt% of divinylbenzene, Preparing 15 wt% of an eco-friendly binder which is an emulsion copolymer comprising 0.5 to 1 wt% of ammonium persulfate, 0.3 to 0.6 wt% of sodium dodecyl sulfate as an emulsifier, and 0.03 to 0.05 wt% of anhydrous sodium acetate as a buffering agent;
And mixing 45% by weight of water with the filler and the binder. The antimicrobial paint using the soil and pine needle, and the method of producing the same.

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