KR100989091B1 - Microbial natural paint composition and method for preparing the same - Google Patents

Abstract

PURPOSE: A natural paint and a manufacturing method thereof are provided to secure the washing off resistance of the paint, and to improve the antibacterial function. CONSTITUTION: A manufacturing method of a natural paint comprises the following steps: mixing 25~30wt% of water and 15~20wt% of zeolite to a stirrer and stirring for 3~5 hours to obtain a zeolite dispersed solution; adding 10~15wt% of vegetable resin, 10~13wt% of titanium dioxide, 5~10wt% of pulp system resin, 2~5wt% of natural preservative, and 10~15% of talc, successively; and aging the mixture for a day.

Description

Natural paint with antibacterial function and its manufacturing method {Microbial Natural Paint Composition And Method For Preparing The Same}

The present invention relates to a composition of a natural paint having an antibacterial function and a method for producing the same. Natural paints according to the present invention are not only harmless to the human body because of the use of antimicrobial natural materials, and furthermore, are effective in suppressing harmful bacteria.

The paint used as a conventional building finishing material contains a lot of volatile organic compounds that are harmful to the human body, which is the main cause of various indoor and outdoor environmental pollution, and various environmental diseases due to invasion of harmful bacteria through the human respiratory organs. What is causing is reality.

In addition, since conventional paints are used as solvents as volatile organic compounds that are harmful to the human body, formaldehyde, benzene, toluene, ethylbenzene, xylene, styrene, and the like can cause severe environments that can cause headaches, dizziness, allergies, atopy, and asthma. It is causing a problem.

In order to cope with these problems, low-toxic eco-friendly paints have been released and commercialized, but these paints simply reduced toxicity compared to conventional paints, and did not focus on functionality, and even functional products did not fall within the KS standard of paints. At the same time that the problem occurs, its functionality is also not satisfactory to provide a paint with antibacterial function.

Accordingly, it is an object of the present invention to provide a natural paint composition which is harmless to the human body and greatly improves the antibacterial function while maintaining existing physical properties conforming to the KS standard as a paint, and a method of manufacturing the same.

In the present invention, as a result of repeated studies to solve the above problems, the present invention has been completed.

The object of the present invention is achieved by an antimicrobial paint composition comprising the following components:

Zeolite 15-20 wt%,

10-14 weight% of vegetable resin,

Titanium dioxide 10-12 wt%,

5 to 10% by weight of pulp resin,

Natural preservative 2 to 5% by weight,

20-25% by weight of water, and

10-14 weight percent talc.

Zeolites used in the present invention have a particle size of 315 to 335 mesh. If the particle size is outside the above range, the stirring with other components is not only smooth, but also the antibacterial activity is lowered.

In the present invention, 15 to 20% by weight of zeolite is used. If the content of the zeolite is less than 15% by weight, the antimicrobial function is lowered, and if it exceeds 20% by weight, there is a problem in that the dispersibility is poor.

The vegetable resin used in the present invention is extracted from the leaves, branches and trees of pine, cypress, fir, and Rigiteda pine. Stock solution is extracted from conifers such as pine, cypress, fir and Rigiteda pine to obtain a resin suitable for paint. In the extraction method of the vegetable resin according to the present invention, the tree branches and leaves, etc. are collected and washed cleanly, and then the leaves and branches are put in a tank by a distillation method and heated to 240 ° C. for 2 to 3 hours. The method of collecting the stock solution is used. At this time, the components condensed by the cooler are separately filtered through the discharge passage. Rather than using the stock solution obtained here, it is stirred at a ratio of 3: 1 with water for at least 3 hours through re-stirring to obtain a resin used for the antibacterial paint.

The vegetable resin obtained as in the above method was mixed with water at a ratio of 1.2: 0.8, and then the mixture was rapidly dispersed at a temperature of 60 ° C. to 65 ° C. for 3 hours or more, and aged for about 12 hours. 1 to 2% by weight is added, and the mixture is rapidly dispersed for 1 to 2 hours, and then aged at room temperature (20 ° C.) for about 12 to 15 hours before use.

The content of the vegetable resin used in the present invention is 10 to 15% by weight. If the content of the vegetable resin is less than 10% by weight, the antibacterial function is lowered, and if the content of more than 15% by weight, there is a problem that the dispersibility with the zeolite and other composition components falls.

In the present invention, 10 to 13% by weight of titanium dioxide is used. If the content of titanium dioxide is less than 10% by weight, the whiteness of the paint is lowered, and if it exceeds 13% by weight, there is a problem in that the function of the paint cannot be exhibited due to the change in physical properties.

An example of the pulp-based resin used in the present invention is cellulose. When the content of the pulp-based resin is less than 5% by weight, the bond with the natural preservative falls, and when the content of the pulp-based resin exceeds 10% by weight, the dispersibility of the resin is lowered.

Natural preservatives used in the present invention include tocopherol, chitoef and the like. These natural preservatives are used in amounts of 2 to 5% by weight. If the content of the natural preservative is less than 2% by weight, the viscosity of the paint is low, and the paint quality does not exceed 300 times of KS standard, so that the quality of the paint is deteriorated.If the content is more than 5% by weight, the bonding strength with the resin component is reduced. There is a problem falling.

In the present invention, 25 to 30% by weight of water is used. If the content of water is less than 25% by weight, the dispersibility of the paint composition is lowered, and if it exceeds 30% by weight, the viscosity of the paint is lowered.

The particle size of the talc used in the present invention is preferably from 750 to 850 mesh, because the mixing collision with the zeolite can be avoided, and the range of the particle size is preferred in consideration of the porosity to be. And it is advantageous to mix the talc particles with slightly finer particles than the zeolite.

In the present invention, 10 to 15% by weight of talc is used. If the talc content is less than 10% by weight, there is a disadvantage in that the durability of the paint is lowered. If the content of the talc exceeds 15% by weight, the wash resistance and the concealment rate of the paint are lowered due to the rise of the LED.

In addition, the method for preparing the antimicrobial paint composition according to the present invention comprises the following steps:

25 to 30% by weight of water and 15 to 20% by weight of zeolite were sequentially added to the stirrer and stirred at 1,800 to 2,000 rpm for 3 to 5 hours to obtain a zeolite dispersion,

10-15% vegetable resin, 10-13% titanium dioxide, 5-10% pulp-based resin, 2-5% natural preservative and 10-15% talc in the dispersion, and

Aging the mixture for at least about 24 hours.

When aging for 24 hours or more in the present invention, a chemical reaction occurs between the paint components to improve the cohesion more than two times, the high cohesive force also improves the preservation function of the paint.

According to the experiment, the paint that has not undergone the above aging process has a problem that the non-volatile substances such as minerals and water are separated from water when stored at room temperature for a certain period of time (about 30 days), and the non-volatile substances precipitate easily. there was. However, the aged paints are not separated after 60 days and are combined with each other. At this time, the combined materials are easily released by stirring about 5-6 times before use, and become the same as the state at the time of manufacture.

The vegetable paint composition according to the present invention is harmless to the human body and greatly improves the antibacterial function while maintaining the basic physical properties as a paint.

Hereinafter, the present invention will be described in more detail with reference to Examples. % Means weight%.

<Examples>

(Production of Vegetable Resin)

Pine was used as the vegetable resin. 100 kg of pine branches and leaves were collected and washed with water, and the leaves and branches were put in a tank and heated to 240 ° C. for 2 hours, and the stock solution obtained by distilling at 240 ° C. for 2 hours was collected and cooled by a cooler. . At this time, the components condensed by the cooler were separately filtered through the discharge passage, and 5 to 6 kg of the obtained stock solution was stirred for 3 hours at a ratio of 3: 1 to water again to obtain 20 kg of a resin for use in antibacterial paint.

Example  One

20 g of water and 15 g of zeolite were sequentially added to a 100 ml flask equipped with a stirrer, and stirred at 1,800 rpm for 3 hours to obtain 35 g of a zeolite dispersion. 72 g of vegetable paint was prepared by sequentially mixing 10 g of pine resin obtained above as a vegetable resin, 10 g of titanium dioxide, 5 g of cellulose resin as a pulp resin, 2 g of tocopherol as a natural preservative, and 10 g of talc.

Example  2

25 g of water and 20 g of zeolite were sequentially added to a 100 ml flask equipped with a stirrer, and stirred at 2,000 rpm for 5 hours to obtain 45 g of zeolite dispersion. 100 g of vegetable paint was prepared by sequentially mixing 14 g of the pine resin obtained above as a vegetable resin, 12 g of titanium dioxide, 10 g of cellulose as a pulp resin, 5 g of chitoef as a natural preservative, and 14 g of talc.

Example  3

23 g of water and 17 g of zeolite were sequentially added to a 100 ml flask equipped with a stirrer, and stirred at 1,800 rpm for 4 hours to obtain 40 g of a zeolite dispersion. 88 g of vegetable paints were prepared by sequentially mixing 13 g of pine resin obtained above as a vegetable resin, 11 g of titanium dioxide, 8 g of cellulose as a pulp resin, 3 g of tocopherol as a natural preservative, and 13 g of talc.

Example  4

22 g of water and 19 g of zeolite were sequentially added to a 100 ml flask equipped with a stirrer, and stirred at 2,000 rpm for 4 hours to obtain 41 g of a zeolite dispersion. 89 g of vegetable paint was prepared by sequentially mixing 12 g of pine resin obtained above as a vegetable resin, 10 g of titanium dioxide, 9 g of cellulose as a pulp resin, 4 g of chitoef as a natural preservative, and 13 g of talc.

Comparative Example

A paint without adding zeolite, vegetable resin, carbon dioxide, vegetable resin or natural preservative which is an active ingredient of the present invention was prepared. The remaining components of the components not added were added to prepare paints according to the blending ratio.

Comparative Example 1 (zeolite not used)

In a 100 ml flask equipped with a stirrer, 20 g of water was mixed with 10 g of pine resin obtained above as a vegetable resin, 10 g of titanium dioxide, 5 g of cellulose as a pulp resin, 2 g of tocopherol as a natural preservative and 10 g of talc. Was prepared.

Comparative Example 2 (no vegetable resin)

25 g of water and 20 g of zeolite were sequentially added to a 100 ml flask equipped with a stirrer, and stirred at 2000 rpm for 5 hours to obtain 45 g of a zeolite dispersion. 86 g of vegetable paint was prepared by sequentially mixing 12 g of titanium dioxide, 10 g of cellulose as a pulp resin, 5 g of chitoef and 14 g of talc as a natural preservative.

Comparative Example 3 (Titanium Dioxide Not Used)

23 g of water and 17 g of zeolite were sequentially added to a 100 ml flask equipped with a stirrer, and stirred at 1800 rpm for 4 hours to obtain 40 g of a zeolite dispersion. 77 g of vegetable paint was prepared by mixing 13 g of pine resin obtained above as a vegetable resin, 8 g of cellulose as a pulp resin, 3 g of tocopherol and 13 g of talc as a natural preservative.

Comparative Example 4 (No natural preservative)

22 g of water and 19 g of zeolite were sequentially added to a 100 ml flask equipped with a stirrer, and stirred at 2000 rpm for 4 hours to obtain 41 g of a zeolite dispersion. 85 g of vegetable paints were prepared by sequentially mixing 12 g of the pine resin obtained above as a vegetable resin, 10 g of titanium dioxide, 9 g of cellulose as a pulp resin, and 13 g of talc in the dispersion.

Antimicrobial Comparison Test

In order to compare the antimicrobial activity of the antimicrobial paint prepared in Example according to the present invention and the comparative paint, an antimicrobial test was conducted according to <KICM-FIR-1002: 2006>.

The strains used for the comparative tests were Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 15442, Staphylococcus aureus ATCC 6538, and Salmonella typhimurium IFO 14193.

(Antibacterial test by E. coli) Initial concentration
(CFU / 40P) Concentration after 24 hours
(CFU / 40P) Example 1 421 One Example 2 432 One Example 3 428 One Example 4 440 One Comparative Example 1 421 2851 Comparative Example 2 432 2540 Comparative Example 3 428 One Apostasy 4 440 33

(Antibacterial test by Pseudomonas aeruginosa) Initial concentration
(CFU / 40P) Concentration after 24 hours
(CFU / 40P) Example 1 438 One Example 2 422 One Example 3 414 One Example 4 451 One Comparative Example 1 421 2940 Comparative Example 2 422 1885 Comparative Example 3 414 One Comparative Example 4 451 44

(Antibacterial test by Staphylococcus aureus) Initial concentration
(CFU / 40P) Concentration after 24 hours
(CFU / 40P) Example 1 402 One Example 2 388 One Example 3 501 One Example 4 417 One Comparative Example 1 402 2763 Comparative Example 2 388 1799 Comparative Example 3 501 2 Comparative Example 4 417 13

(Antibacterial test by Salmonella) Initial concentration
(CFU / 40P) Concentration after 24 hours
(CFU / 40P) Example 1 423 One Example 2 408 One Example 3 456 One Example 4 412 One Comparative Example 1 423 2851 Comparative Example 2 408 2513 Comparative Example 3 456 One Comparative Example 4 412 43

<Physical test of paint>

In accordance with the present invention is carried out in accordance with the KS standard <KS M 6010 2> commonly used to compare the properties of the antimicrobial paints prepared in Examples and the paints to be compared (painting, hiding rate, wash resistance) It was. The led was conducted through a lead test meter according to the test method of KS M 5000, the concealment rate was carried out with a wet coating thickness of 65 ㎛ according to KS M ISO 2814, and the wash resistance was according to test method 3351 of KS M 5000. After the natural drying for 24 hours, the degree of peeling was observed.

(Paint driven, concealed rate and wash resistance test) lead
(82 ~ 110K.U) Concealment
(92% or more) Wash resistance
(300% or more) Example 1 90 93 500 Example 2 101 96 750 Example 3 85 92 360 Example 4 88 92 420 Comparative Example 1 77 90 250 Comparative Example 2 65 91 100 Comparative Example 3 83 78 350 Comparative Example 4 87 92 280

(Test evaluation)

As can be seen in Tables 1 to 4, when using the paint composition prepared according to the present invention (Examples 1 to 4), the initial concentration for E. coli, Pseudomonas aeruginosa, Staphylococcus aureus and Salmonella, respectively, is about 400 It was above CFU / 40P, but after 24 hours, the concentrations of the bacteria were all greatly reduced to about 1 CFU / 40P.

On the other hand, the comparative paints prepared according to Comparative Examples 1 to 4 by varying the composition and components of the present invention, the initial concentration was about 400 CFU / 40P or more as above, but after 24 hours the concentration of the bacteria compared In the case of Examples 1 and 2 the increase was about 4.5 to 7 times.

However, in the case of Comparative Example 3 was tested using a paint without using titanium dioxide in the components of the paint composition, the initial concentration of E. coli, Pseudomonas aeruginosa, Staphylococcus aureus and Salmonella is about 400 CFU as in the paint composition of the present invention. All concentrations after 24 hours above / 40P decreased to 1-2 CFU / 40P. This means that paints without titanium dioxide have no effect on antibacterial activity.

In addition, in the case of Comparative Example 4 was tested using a paint without a natural preservative of the components of the paint composition, the initial concentration for E. coli, Pseudomonas aeruginosa, Staphylococcus aureus and Salmonella is about 400 CFU as in the paint composition of the present invention. All concentrations after 24 hours above / 40P decreased to 13-43 CFU / 40P. This means that paints without natural preservatives only slightly affect antibacterial activity.

As can be seen in Table 5, when comparing the use of the paint composition (Examples 1 to 4) prepared according to the present invention and the use of the comparative paint (Comparative Examples 1 to 4), In terms of concealment and wash resistance the paints according to the invention are comparable or even higher than the paints to be compared.

This means that the paint composition according to the present invention can increase antimicrobial properties without compromising physical properties such as lead, hiding rate, wash resistance, etc., compared to the comparative paint composition.

Claims (6)

An antimicrobial paint composition comprising the following ingredients:
Zeolite 15-20 wt%,
10-14 weight% of vegetable resin,
Titanium dioxide 10-12 wt%,
5 to 10% by weight of pulp resin,
Natural preservative 2 to 5% by weight,
20-25% by weight of water, and
10-14 weight percent talc. The antimicrobial paint composition of claim 1 wherein the particle size of the zeolite is between 315 and 335 mesh. The antimicrobial paint composition according to claim 1 or 2, wherein the vegetable resin is pine, cypress, fir or Rigiteda pine. The antimicrobial paint composition according to claim 1 or 2, wherein the natural preservative is tocopherol or chitoef. The antimicrobial paint composition according to claim 1 or 2, wherein the talc particles have a size of 750 to 850 mesh. A process for preparing an antimicrobial paint composition comprising the following steps:
25 to 30% by weight of water and 15 to 20% by weight of zeolite were sequentially added to the stirrer and stirred at 1,800 to 2,000 rpm for 3 to 5 hours to obtain a zeolite dispersion,
10-15% vegetable resin, 10-13% titanium dioxide, 5-10% pulp-based resin, 2-5% natural preservative and 10-15% talc in the dispersion, and
Aging the mixture for at least 24 hours.