KR20180025706A - Eco-friendly paint composition and manufacturing method thereof - Google Patents

Abstract

The present invention relates to an eco-friendly paint composition. More specifically, the present invention relates to an eco-friendly paint composition, and a production method thereof. To this end, the eco-friendly paint composition contains oyster shell powder, Perilla frutescens (L.) Britton var. purpurascens (Hayata) H. W. Li, and red clay, specifically, oyster shell powder, Perilla frutescens (L.) Britton var. purpurascens (Hayata) H. W. Li, red clay, silica, a water-soluble resin, and water, without release of harmful substances from the eco-friendly paint composition. The eco-friendly paint composition is capable of improving indoor air quality by performing antibacterial and deodorizing functions, while removing and adsorbing harmful substances such as ammonia and formaldehyde emitted from building interior materials.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an eco-friendly paint composition,

The present invention relates to an eco-friendly coating composition, and more particularly, to an eco-friendly coating composition which contains borage, lobular and loess, and more specifically, borazine, lobule, loess, silica, water- The present invention relates to an environmentally friendly coating composition which is not discharged and has an effect of adsorbing and removing harmful substances such as ammonia and formaldehyde generated in a building interior material, and deodorizing and antibacterial functions to improve indoor air quality, and a process for producing the same.

Generally, a paint mixed with chemicals such as organic solvents and pigments is used to protect the surface of the building and to improve the beauty. Chemicals released from paints, especially volatile organic compounds such as benzene, chloroform, styrene, and formaldehyde, are toxic and cause environmental pollution as well as harmful to human body. In addition, fungi, viruses, mites and the like present in the air not only pollute indoor air but also accumulate in the room and cause various problems. The toxic substances from the building materials and paints of new buildings and the contaminants existing in the air cause health problems and these problems have long been a social problem such as sick house syndrome and environmental hormones.

Recently, as the awareness of the residential environment has increased, studies on the improvement of the indoor air quality and the harmful substances have been actively carried out, and the environment-friendly building materials containing no harmful substances and the natural Coating compositions have been proposed.

As a prior art for solving the above problem, Korean Patent Registration No. 10-0591783 discloses a finishing material composition for architectural interior materials, which releases anion and emits soot, and a manufacturing method thereof. Although the prior art has the effect of dissolving anions and soils by containing sericite, gypsum stone and liquid pine needles, it has a disadvantage in that it has no effect of blocking harmful substances and has no antibacterial effect.

Korean Patent No. 10-1266838 discloses a composition for coating a building having an air quality improving effect in an environmentally friendly manner as a prior art which improves the prior art. Although the prior art has the effect of deodorizing and antibacterial effects by including yellow clay and kaolin, fine cracking occurs when the coating is applied and dried. Such cracks not only degrade aesthetics but also function as a finishing material for protecting the surface of a building .

As another prior art, Korean Patent No. 10-1254579 discloses a natural aqueous coating composition and a method for producing the same. The prior art uses a non-toxic ceramic and a non-toxic binder to reduce harmful substances generated in the paint itself, but it has a disadvantage in that it is not effective in improving harmful substances present in the air.

In order to solve the problems of the prior art, there is a demand for an environmentally friendly paint which has antibacterial and deodorizing functions and protects buildings without generating harmful substances.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide an environmentally friendly coating composition containing borage, lobules and loess.

It is another object of the present invention to provide an environmentally friendly coating composition further comprising a top layer on the above-mentioned borage powder, lobules and yellow loess.

It is another object of the present invention to provide a process for producing an environmentally friendly coating composition containing borage, lobules and loess.

In order to attain the above object, an eco-friendly coating composition according to the present invention is characterized by containing borage, leaflets and loess.

Further, the environmentally friendly coating composition of the present invention is characterized by further comprising a top layer on the above-mentioned borage powder, lobules and yellow loess.

The method for producing an eco-friendly coating composition according to the present invention may further comprise a step (S10) of pulverizing oyster shells, lobules and loess, respectively, and a step of pulverizing the powdered oyster shells (borage), lobes and loess (S20) of adding a water-soluble resin and water to the mixed powder of the step (S20), and stirring the mixture to prepare an environmentally friendly coating composition (S30).

The eco-friendly coating composition according to the present invention has the effect of providing an eco-friendly paint containing boroglass, lobed leaf and loess and containing no organic solvent harmful to the human body and without emission of harmful substances.

Also, the eco-friendly coating composition of the present invention includes borage, lobules and loess to adsorb and remove harmful substances such as ammonia and formaldehyde generated in building interior materials, and perform antibacterial and deodorizing functions to improve indoor air quality It is effective.

Hereinafter, the present invention will be described in detail.

The eco-friendly coating composition according to the present invention is characterized by containing borage, lobules and loess, and in particular, it includes borage, lobules, loess, silica, water-soluble resin and water. 5-15% by weight of borage powder, 5-10% by weight of lobules, 15-25% by weight of loess, 5-10% by weight of silica, 10-15% by weight of water-soluble resin and 25% by weight of water 25% by weight based on the total weight of the composition of the present invention. To 60% by weight based on the total weight of the composition.

The borage powder, lobed leaf, and loess powder contained in the eco-friendly coating composition of the present invention are preferably powdered.

The oyster shells remove impurities, salts and odors by washing the oyster shells, remove microorganisms present in oyster shells through a sterilization process, remove moisture in a drying process, Followed by pulverization. The above-mentioned borog powder can replace solid components such as calcium carbonate and lime used in conventional architectural paints. The above-mentioned 200-500 mesh of borage powder has an intergranular cohesive strength itself, and plays a role in improving the adhesive strength, tensile strength and hardness of the coating composition.

When the content of the boron powder is less than 5% by weight based on the total weight of the coating composition, the content of the boron powder is insufficient and the adhesive strength of the coating composition deteriorates. When the content exceeds 15% by weight, Is small.

The lobules are plants belonging to the family Lamiaceae, and it is preferable to use the leaves and the stalks in powder form. The lobules are rich in plant vitamins, minerals, nasin, potassium, iron, magnesium, and zinc, and are rich in anthocyanin-based pigments. In addition, pharmacological actions such as anti-inflammatory and anti-allergic action and antibacterial action have been reported since they contain aromatic substances and beta-carotene.

If the content of the leaflets is less than 5% by weight based on the total weight of the paint composition, the antibacterial effect of the leaflets is insignificant. If the leaflets are more than 10% by weight, the antibacterial effect of the leaflets is not improved.

The loess is a material consisting of silica and soil containing hydrous iron oxide and anhydrous iron oxide, and is mainly composed of sediments having a diameter of 0.002 to 0.005 mm in the size of a silt. The main components of the loess are silica, iron powder, alumina, magnesium, sodium, calcium carbonate and lime. The above-mentioned loess has a large amount of far-infrared rays for shielding electromagnetic waves, and has effects such as humidity control, antibacterial and detoxification.

If the content of the loess is less than 15% by weight based on the total weight of the coating composition, the effect of removing the offensive odor and harmful substances by the loess is insignificant. If the content of the loess exceeds 25% by weight, fine cracks may occur in the dried coating.

The silica sand acts to improve the durability and heat resistance of the environmentally friendly coating composition of the present invention. If the content of the silica sand is less than 5% by weight based on the total weight of the coating composition, the durability and heat resistance of the coating composition may be deteriorated due to the insufficient amount of silica, and if it exceeds 10% by weight, the appearance of the coating film may be poor.

The water-soluble resin may be epoxy-based, acrylic-based, urethane-based, alkyd-based, polyester-based or polyvinyl chloride-based. Specific examples thereof include ethylene vinyl acetate (EVA), polyvinyl chloride (PVAC), polybutadiene, polyvinylidene chloride, and polyurethane (PU).

If the content of the water-soluble resin is less than 10% by weight based on the total weight of the coating composition, it does not act as a binder. If the content of the water-soluble resin exceeds 15% by weight, the coating composition may become solidified and the coating workability of the coating composition may be deteriorated.

Another embodiment of the present invention is an eco-friendly coating composition further comprising an upper limb on the borehole, lobes and loess. In an eco-friendly coating composition according to another embodiment, 5-15 wt% of borage powder, 5-10 wt% 15 to 20% by weight of silica, 5 to 10% by weight of silica, 10 to 15% by weight of water-soluble resin, 5 to 10% by weight of upper body and 20 to 55% by weight of water.

The upper limb is a dried long branch of the mulberry tree, and the branch has a diameter of 0.5 to 2 cm. The outer surface of the upper limb is grayish brown, has a light brownish small dot-shaped papilla and a thin vertical pattern. The upper part contains crude fiber in an amount of about 50%, and other components include tannin, flavonoid, calcium, potassium and the like. The upper limb has an effect of adsorbing harmful substances and releases directional ingredients to help insect mites and the like. If the content of the upper part is less than 5% by weight based on the total weight of the coating composition, the effect of adsorbing harmful substances is insignificant. If the content of the upper part exceeds 10% by weight, the crude fiber component of the upper part increases the viscosity of the coating composition, Can be degraded.

The environmentally friendly coating composition may further include a dispersant, a thickener, an additive, and the like.

The dispersant may be guar gum or xanthan gum. The thickener may be methylcellulose, carboxymethylcellulose, and casein. The additive may be sodium alginate.

Hereinafter, a method of preparing an eco-friendly coating composition according to the present invention will be described in detail.

The method for preparing an eco-friendly coating composition according to the present invention comprises the steps of: (S10) powdering oyster shells, lobules, loess, and upper limes respectively; and pulverized oyster shells (borghal), lobes, (S20) of adding silica sand to the mixed powder to prepare a mixed powder and a step (S30) of adding an aqueous resin and water to the mixed powder of the step (S20) and stirring to prepare an environmentally friendly coating composition do.

First, the oyster shell, the leaflets, the yellow loess, and the upper limb are pulverized (S10).

The oyster shells are put into a washing furnace to remove salts, impurities and odors, remove microorganisms present in oyster shells from an ultraviolet sterilizer, and then remove moisture from the dryer. The dried oyster shells are pulverized with a pulverizer to prepare a borgh grain having a particle size of 200 to 500 mesh.

The leaflets and stems of the leaflets and leaves of the leaflets are inserted into a washing machine to remove soil and impurities. The viruses and microorganisms existing in leaves and stems of leaflets and stem are removed from the ultraviolet sterilizer, and moisture is removed from the dryer. The dried leaflets are ground with a grinder to a particle size of 100 to 150 mesh.

After removing the microorganisms present in the loess in the ultraviolet sterilizer, the loess is removed from the drier and then pulverized with a pulverizer to obtain a loess having a particle size of 200 to 500 mesh.

The upper limb is put into a washing furnace to remove soil and impurities, the insect and microorganisms are removed from the upper limb by an ultraviolet sterilizer, and then the moisture is removed from the drier. The dried upper part is pulverized by a pulverizer to a particle size of 100 to 150 mesh.

Preferably, the size of the oyster shell and the ground particles of the loess is 200 to 500 mesh, and the size of the ground particles of the lobule and the upper ground is 100 to 150 mesh. If the particle size of the oyster shell and loess is less than 200mesh and the particle size of the lobes and upper limbs is less than 100mesh, fine cracks may occur on the dried coating film (coating surface) after application of the coating. Also, if the size of the oyster shell and loess is greater than 500mesh, and the size of the lobules and upper limb is greater than 150mesh, the particle size may be too small to make the coating material difficult to handle.

(S20) of preparing powdered oyster shells (borage), lobules, loess, and topsoil of the step (S10) by adding silica sand to the mixed powder.

When preparing the mixed powder in the step (S20), the mixture powder is prepared by further including upper limb in the group consisting of borghum, lobules, loess and silica or a group consisting of borek powder, lobules, loess and silica.

Water-soluble resin and water are added to the mixed powder of the step (S20) and then stirred to prepare an environmentally friendly coating composition (S30).

10 to 15% by weight of a water-soluble resin and 25 to 60% by weight of water are mixed with the mixed powder to prepare an eco-friendly coating composition having a viscosity of 500 to 10,000 cps.

If the viscosity of the environmentally friendly coating composition is less than 500 cps, the residual water content in the coating film relatively increases and the physical properties of the coating composition may deteriorate. If the viscosity exceeds 10,000 cps, the viscosity of the coating composition is high, It may be difficult to form a coating film having a uniform thickness.

Hereinafter, the production examples, examples and comparative examples of the present invention will be described in detail. The following Production Examples, Examples and Comparative Examples are merely illustrative of the present invention, and the present invention is not limited to the following Production Examples, Examples and Comparative Examples.

< Example  1 to 5> of the environmentally friendly coating composition Manufacturing example

The raw materials were compounded according to the following Table 1 to prepare an environmentally friendly coating composition of the present invention.

(S10) Oyster shells, lobules, loess, and upper limbs were washed, sterilized and dried, respectively, and then pulverized to prepare 200-500 mesh of borage and loess, 100-150 mesh of lobes and upper limbs.

(S20) Silica was mixed with the pulverized barley powder, lobule, loess, and top paper to prepare a mixed powder.

(S30) Water-soluble resin and water were added to the mixed powder of step S20 and stirred to prepare an eco-friendly coating composition.

Raw material (% by weight) Example 1 Example 2 Example 3 Example 4 Example 5 Boregar 5 15 15 5 5 Leaflet 5 5 10 5 5 ocher 25 25 25 25 25 Upper limb 5 10 Silica sand 10 10 10 10 10 Water-soluble resin 15 15 15 15 15 water Balance Balance Balance Balance Balance

 < Comparative Example  > The coating composition Comparative Example

Activated carbon (charcoal) paints sold in the market as deodorizing paints were used.

 < Experimental Example  1> Deodorization of environmentally friendly coating compositions

In order to confirm the deodorizing power of the environmentally friendly coating compositions prepared in Examples 1 to 5, test conditions (temperature: 25 ± 3 ° C., relative humidity: 50 ± 10 ° C.) using a gas detector (GV-100S, Gastec Co.) %, Sample type: 10L tether bag). The concentration of formaldehyde and ammonia gas was measured.

As a comparative group, a tether bag was prepared by coating the activated carbon paint of the comparative example with a thickness of 40 탆, preparing a tether bag which was coated with the environmentally friendly coating composition of Examples 1 to 5 to a thickness of 40 탆, The concentrations of formaldehyde and ammonia gas were measured 30 minutes and 1 hour after injection, and the results are shown in Table 2.

Elapsed time Comparative Example Example 1 Example 2 Example 3 Example 4 Example 5 Formaldehyde
(ppm) Immediately after injection 20 20 20 20 20 20 30 minutes later 16 12 10 8 7 5 After 1 hour 11 7 4 3 3 One ammonia
(ppm) Immediately after injection 100 100 100 100 100 100 30 minutes later 78 54 48 41 38 34 After 1 hour 42 21 17 15 14 12

As shown in Table 2 above, it can be seen that the eco-friendly coating compositions of Examples 1 to 5 are superior in deodorizing effect to the activated carbon coatings of the comparative examples. Comparing Examples 1 and 2, it can be seen that the deodorizing effect of Example 2, which contains a large amount of borage powder, is better than that of Examples 2 and 3, . Comparing Examples 1 and 4, it can be seen that Example 4 including superior upper portion is superior in deodorizing effect. Comparing Examples 4 and 5, it can be seen that the deodorizing effect of Example 5 having superior upper portion content is excellent .

Accordingly, it was found that the deodorizing effect of ammonia and formaldehyde was enhanced when the content of borage powder, lobules and upper limb were increased, and that the direction component of the upper limb improved the deodorizing power of the environmentally friendly coating composition.

< Experimental Example  2> Antimicrobial of environmentally friendly paint composition

Antimicrobial activity against Escherichia coli ATCC 25922 was measured by the method of KICM-FIR-1002 in order to confirm the antibacterial activity of the environmentally friendly coating compositions prepared in Examples 1 to 5.

Comparative Example Example 1 Example 2 Example 3 Example 4 Example 5 Initial concentration (CFU / 40 g) 422 422 422 422 422 422 After 24 hours concentration (CFU / 40)) 370 28 27 9 26 26 Bacterial reduction rate (%) 12.3 93.3 93.6 97.8 93.8 93.8

As shown in Table 3, it can be seen that the eco-friendly coating compositions of Examples 1 to 5 are superior to the activated carbon coatings of the comparative examples in antibacterial effect against E. coli. Comparing Examples 1 to 5, it can be seen that the antibacterial effect of Example 3 having the largest lobule content is the most excellent. In addition, when Examples 1, 4 and 5 are compared, it can be understood that the antibacterial effects of Examples 4 and 5 including upper limb were not effectively increased.

Therefore, it can be seen that the larger the content of the lobules, the better the antibacterial effect, and the upper limb does not effectively affect the antibacterial activity.

 < Experimental Example  3> Properties of environmentally friendly coating compositions

The coating compositions of Examples 1 to 5 and Comparative Examples were used to form a coating film having a thickness of about 10 탆 on a concrete surface of 0.2 m 2 and then measured for stability, surface hardness, adhesion and peelability in a standard state, Respectively.

Comparative Example Example 1 Example 2 Example 3 Example 4 Example 5 Stability (kg / f) 851 985 1136 1124 994 1116 Surface hardness no problem no problem no problem no problem no problem no problem Attachment middle good good good middle good Peelability Slight peeling Peeling off Peeling off Peeling off Slight peeling Peeling off

As shown in Table 4, it can be seen that the eco-friendly coating compositions of Examples 1 to 5 are more stable than the activated carbon coatings of the comparative examples. Comparing Examples 1 and 2, it can be seen that Example 1 having a low content of borog powder has the lowest stability and adherence is poor and peeled off a little, and Examples 1 and 4 are compared with each other in Example 4 The stability is high. In addition, the comparison of Examples 4 and 5 shows that the stability of Example 4 having a lower upper portion content is the lowest.

Accordingly, it was confirmed that the content of the borek powder was higher, the stability of the environmentally friendly coating composition was improved, the adhesion was improved, and it was not easily peeled off from the surface, and it was confirmed that the crude fiber component of the upper side increased the stability of the coating composition.

Claims (7)

Borage powder, lobed leaf, and loess. The method according to claim 1,
Further comprising an upper limb on the borghum, lobes and yellow loess. The method according to claim 1,
The environmentally friendly coating composition contains 5-15% by weight of borage, 5-10% by weight of lobules, 15-25% by weight of loess, 5-10% by weight of silica, 10-15% by weight of water-soluble resin and 25-60% by weight of water Wherein the coating composition is a coating composition. 3. The method of claim 2,
The environmentally friendly coating composition comprises 5 to 15% by weight of borage, 5 to 10% by weight of lobules, 15 to 20% by weight of loess, 5 to 10% by weight of silica, 10 to 15% by weight of water- 20 to 55% by weight based on the total weight of the composition. Powdering oyster shell, lobule and loess (S10);
(S20) preparing a mixed powder by adding silica sand to the pulverized oyster shell (borage), lobes and loess of the step (S10); And
And a step (S30) of adding an aqueous resin and water to the mixed powder of the step (S20) and stirring to prepare an environmentally friendly coating composition. 6. The method of claim 5,
Wherein the oyster shell and loess are pulverized to a particle size of 200 to 500 mesh and the lobules are pulverized to a particle size of 100 to 150 mesh in the step (S10). 6. The method of claim 5,
Wherein the environmentally friendly coating composition has a viscosity of 500 to 10,000 cps.