WO2016076663A1 - Composition for degrading endocrine disruptor, a coated steel plate using same, and method for preparing same - Google Patents

Abstract

The present invention relates to an ink jet coating composition for degrading an endocrine disruptor, a coated steel plate using the same, and a method for preparing the same and, more specifically, to an ink jet coating composition for degrading an endocrine disruptor containing a UV-curable acrylic oligomer, an acrylic monomer, a photoinitiator, a photocatalyst, and a phytoncide capsule having phytoncide, TiO₂, and a metal therein, to a coated steel plate using the same, and to a method for preparing the same.

Description

Environmental Hormone Degrading Compositions, Coated Steel Sheets Using The Same,

The present invention relates to an environmental hormone degrading inkjet coating composition, a coated steel sheet using the same, and a method for manufacturing the same, and more particularly, an environmental hormone degrading inkjet coating composition having excellent absorption and decomposition effects of environmental hormones by maintaining a uniform dispersion state, The composition relates to an inkjet sprayed coated steel sheet and a method for producing the same.

Phytoncide is mainly composed of organic compounds of the Terpene family, which are aromatic substances emitted by trees, but the scent is not all. Among the dozens of substances that make up phytoncide, there are components that are irrelevant to fragrance.In addition to volatile terpenes, phytoncide is contained in plants in a comprehensive sense because it contains a large amount of non-volatile substances such as alkaloids, glycosides, flavonoids, and phenolic substances. All substances that inhibit the growth or growth of microorganisms as a substance that can be interpreted.

Terpenes (Terpene) includes a plurality of isoprene (isoprene, C ₅ H ₈₎ as a kind of hydrocarbons made in this combination, the plant is typically about 0.01 to 5% of a synthetic terpenes through the photosynthesis of solar energy. Terpenes are generally obtained in the form of essential oils by steam distillation, compression or extraction.

The amount of phytoncide released and its components vary from tree to tree, and conifers are known to emit about twice as much phytoncide than hardwoods, and phytoncide has many antibacterial, deodorant, sedative and stress relief effects. It is known to function, and the material that is expected to be used above all to modern people suffering from various pollutions and stresses today, but it is still only a fraction of the efficacy has been revealed.

Efforts have been made to apply the effects of phytoncide to human life, but this is mainly limited to fields such as air purifiers and volatilizers, and Korean Patent Registration No. 517955 has a composition containing microcapsules containing phytoncide essential oils. Although the treated fabric has been disclosed, the fabric has only been treated with phytoncide only, has excellent deodorizing and antimicrobial properties, and has not been disclosed a technique for improving functionality by mixing with other additives.

On the other hand, the new house syndrome caused by the continuous discharge of toxic chemicals from the finishing materials or building materials used in new buildings such as apartments over a long period of time has become a social problem.

Hazardous substances causing the sick house syndrome include benzene, toluene, formaldehyde and acetaldehyde. Among these harmful substances, formaldehyde is not only widely used in finishing materials and building materials, but is also known as a carcinogen. It is becoming.

In order to block or remove harmful substances causing these sick house syndromes, physical methods such as adsorption and chemical methods such as oxidation have been proposed and used. As a physical method using the adsorption, a simple adsorbent such as activated carbon, charcoal or loess, or a porous adsorbent such as activated clay may be used. However, it is known that physical methods using these adsorptions are difficult to obtain satisfactory effects in adsorption performance, persistence, and the like.

As a chemical method, photocatalysts using chemical properties of titanium dioxide (TiO ₂ ) are used. The photocatalyst includes a binder for binding titanium dioxide and titanium dioxide particles to each other, and is coated in a thin film on a wall or the like using a spray gun.

In this way, the coated photocatalyst acts to rapidly advance the redox reaction of harmful substances in the adjacent area when ultraviolet rays of 380 to 400 nm wavelength are irradiated. Accordingly, the harmful substances adsorbed on the surface of the coated photocatalyst, that is, the harmful substances in the air may be decomposed and removed.

By the way, according to the conventional photocatalyst, there is a problem that when the ultraviolet irradiation is not made, or when the contaminant adheres to the surface of the coating layer, adsorption of the harmful substance is not properly performed and the decomposition effect of the harmful substance is reduced.

Furthermore, in terms of the method of applying the existing eco-friendly coating composition, when using a coating method such as a roll coating or a non-contact curtain coating, it is difficult to uniformly disperse the environmental hormone healing substances, and there is a problem that occurs when one side is coated have. In particular, since the coating is performed at a very high pressure in the case of roll coating, the capsule may be damaged by the roll pressure when using the phytoncide capsule.

Therefore, it is expected that the coating composition may be usefully applied in the related art when uniformly dispersed to provide a coating composition having improved adhesion of environmental hormones and decomposition of harmful substances.

One aspect of the present invention is to provide a phytoncide capsule including a phytoncide and a coating composition capable of inkjet coating on the surface of the steel sheet such that TiO ₂ is uniformly dispersed, a coated steel sheet coated with the composition, and a method of manufacturing the same.

Another aspect of the present invention provides an inkjet coating composition, a coated steel sheet, and a method for manufacturing the same, which can effectively disintegrate environmental hormones by maximizing the contact area with environmental hormones, which are harmful substances in the air, by uniformly inkjet coating the coating composition. will be.

One embodiment of the invention, based on the total weight of the coating composition, 2 to 30% by weight ultraviolet curable acrylic oligomer, 25 to 70% by weight acrylic monomer, 0.5 to 10% by weight photoinitiator, 1 to 30% by weight photocatalyst and It provides an environmental hormone decomposition inkjet coating composition comprising 0.01 to 5% by weight of phytoncide capsules containing phytoncide, TiO ₂ and metal therein.

The phytoncide capsule is preferably a porous structure.

The metal is preferably at least one selected from the group consisting of iron, cobalt and nickel.

It is preferable that the weight average molecular weights of the said ultraviolet curable acryl oligomer are 1,000-3,000.

The ultraviolet curable acrylic oligomer is composed of an alkyl ester of acrylic acid, an alkyl ester of methacrylic acid or a mixture thereof, and the alkyl preferably has 18 or less carbon atoms.

The acrylic monomer is composed of an alkyl ester of acrylic acid, an alkyl ester of methacrylic acid or a mixture thereof, and the alkyl preferably has 18 or less carbon atoms.

The photoinitiator preferably has a property of initiating photopolymerization at a wavelength of 360 to 370 nm, 380 to 400 nm or a mixture thereof.

The photocatalyst is preferably greater than the average particle size of 0 in response to the 300 to 420nm wavelength of titanium dioxide (TiO ₂₎ of 100nm or less.

The phytoncide capsule preferably has an average particle diameter of 0.5 to 5㎛.

The environmental hormone degrading inkjet coating composition preferably further comprises a dispersant.

The viscosity of the environmental hormone decomposition inkjet coating composition is preferably in the range of 20 to 25 ℃ temperature, 1 to 50cp.

Another embodiment of the present invention, providing a steel sheet; On at least one side of the steel sheet, based on the total weight of the coating composition, 2 to 30% by weight UV curable acrylic oligomer, 25 to 70% by weight acrylic monomer, 0.5 to 10% by weight photoinitiator, 1 to 30% by weight photocatalyst, and the inside Inkjet spraying an environmental hormone degrading inkjet coating composition comprising 0.01-5% by weight of an phytoncide capsule comprising phytoncide, TiO ₂ and metal; And forming a magnetic field over the sprayed coating composition to move the phytoncide capsules over the coating layer, thereby providing a method for producing a coated steel sheet coated with an environmental hormonal decomposition inkjet coating composition.

The spraying may be performed so that at least 10 droplets per 1 cm ² of steel sheet are sprayed.

The spraying is preferably performed so that the sum of the phytoncide capsule and the photocatalyst is included in one droplet.

The steel sheet is preferably a galvanized steel sheet, a stainless steel sheet, an aluminum steel sheet, or a magnesium steel sheet.

Another embodiment of the present invention is a steel sheet; And a coating layer formed on at least one surface of the steel sheet, wherein the coating layer is based on the total weight of the coating composition, from 2 to 30% by weight of an ultraviolet curable acrylic oligomer, from 25 to 70% by weight of an acrylic monomer, from 0.5 to 10% by weight of a photoinitiator, 1-30 wt% of a photocatalyst, and a coating composition comprising 0.01-5 wt% of a phytoncide capsule comprising phytoncide, TiO ₂ and a metal therein, wherein the phytoncide capsule is located on top of the coating layer. Provided is a coated steel sheet coated with an inkjet coating composition.

The phytoncide capsule is preferably a porous structure.

According to the present invention, it is possible to obtain an environmental hormone decomposition inkjet coating composition in which TiO ₂ particles and phytoncide capsules are uniformly dispersed.

In addition, by coating the environmental hormone decomposing inkjet coating composition on a steel sheet through an inkjet coating, TiO ₂ and phytoncide capsules are uniformly coated in each droplet of the ink to maximize the contact area with harmful substances such as environmental hormone substances in the air. As a result, the adsorption and decomposition effects of harmful substances such as environmental hormone substances can be increased.

1 is a schematic view showing the form of the ink jet injection of the environmental hormone decomposition inkjet coating composition of the present invention.

Figure 2 is a schematic diagram showing a method for producing a phytoncide capsule showing a porous structure of the present invention.

Figure 3 is a schematic diagram showing the electrostatic repulsion provided by the dispersant in the case of an environmental hormone degrading inkjet coating composition further comprising a dispersant.

Figure 4 is a schematic diagram showing the steric hindrance effect provided by the dispersant in the case of an environmental hormone degrading inkjet coating composition further comprising a dispersant.

Figure 5 is a schematic diagram showing a step of forming a magnetic field to place the phytoncide capsule on the coating layer in the method for producing a steel sheet coated with an environmental hormone decomposition inkjet coating composition of the present invention.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below.

According to the present invention, there is provided an environmental hormone decomposition inkjet coating composition in which the photocatalyst and the phytoncide capsule are uniformly dispersed.

More specifically, the present invention, based on the total weight of the coating composition, 2 to 30% by weight of the ultraviolet curable acrylic oligomer, 25 to 70% by weight acrylic monomer, 0.5 to 10% by weight photoinitiator, 1 to 30% by weight photocatalyst, and internal It provides an environmental hormone degrading inkjet coating composition comprising 0.01 to 5% by weight of phytoncide capsules comprising phytoncide, TiO ₂ and metal.

Phytoncide essential oils can be obtained from trees such as globular, cypress, birches, firs, pines, and the like, and particularly preferably from cypresses and pines. Cypress is an effective source of phytoncide essential oil, which is native to Korea.

It is preferable that the phytoncide included in the present invention is included in the capsule, and the capsule including the phytoncide, that is, the phytoncide capsule, is preferably in a form that can be broken down under a constant pressure and exposed to air. That is, the phytoncide capsule used in the present invention may be, for example, a microcapsule in liquid form in which the phytoncide is contained inside a capsule in which the epidermis of the capsule is made of melamine so that the phytoncide can be maintained for a long time.

Such a method for producing a phytoncide capsule is a technique known in the art, for example, it is generally possible to use an emulsion polymerization method in the polymer polymerization method. More specifically, the capsule manufacturing method disclosed in Korean Patent Application No. 2009-0026590 may be employed, but is not limited thereto.

The phytoncide capsule containing phytoncide preferably has an average particle diameter of 0.5 to 5 µm, more preferably 2 to 4 µm. In order to maintain the function of phytoncide for a long time, the average particle diameter of phytoncide capsule should be adjusted. When the average particle diameter of the phytoncide capsule exceeds 5 μm, inkjet spraying becomes difficult, so that it is inappropriate for use in an inkjet coating composition. When the average particle diameter is less than 0.5 μm, the size of the phytoncide capsule may be too small to be included in the capsule. Insufficient content of phytoncide, which makes it difficult to express effects associated with environmental hormone degradation.

In addition, the phytoncide capsule has a uniform distribution of particle diameters, it is preferable to have a high solid content of 40 to 60% by weight, low viscosity and excellent dispersion stability. In addition, the phytoncide capsule thus obtained has the appropriate hardness and flexibility that can be destroyed at an appropriate speed by external forces such as pressure, friction, etc. generated in daily life, and can continuously release the phytoncide.

Furthermore, the phytoncide capsule of the present invention is preferably a capsule having a porous structure. That is, when the phytoncide capsule has a porous structure, substances involved in environmental hormone decomposition such as phytoncide and TiO ₂ contained in the capsule are more easily released from the capsule, so that the effect of decomposing the environmental hormone can be further improved. have.

On the other hand, the phytoncide capsule comprises a metal together with a phytoncide, TiO ₂ , after the inkjet coating the environmental hormone decomposition inkjet coating composition on the surface of the steel sheet, using a magnetic field to adjust the phytoncide capsule to be located above the coating layer It is possible. In this case, the metal may be, for example, one or more selected from the group consisting of iron, cobalt, and nickel, but is not limited thereto.

The photocatalyst which may be included in the environmental hormone degrading inkjet coating composition of the present invention is effective in the decomposition treatment of organic substances. In this case, it is important to effectively improve the decomposition treatment effect with a minimum amount, and in the present invention, by using the photocatalyst together with the phytoncide capsule, it is effective to decompose environmental hormones which are harmful to the human body, which is inkjet coating It can be prepared by the composition to maximize the effect.

Specifically, the photocatalyst is preferably titanium dioxide (TiO ₂ ) having a particle diameter of more than 0 and 100 nm or less, which is exposed to air and reacts to a wavelength of 300 to 420 nm ultraviolet rays in the atmosphere. When the particle size of the titanium dioxide (TiO ₂ ) is greater than 100 nm, a problem may occur that the nozzle of the ink jet head is clogged because the particles are too large when the ink jet is ejected.

In the present invention, the photoinitiator preferably has a wavelength of 360 to 370 nm, 380 to 400 nm or a mixture thereof, and is not particularly limited as long as it can initiate ultraviolet curing, for example, the photoinitiator is IRGACURE 907 , IRGACURE 819, IRGACURE 369, TPO, Tinuvin 400, Tinuvin and the like can be used.

In addition, in the case of the photoinitiator, since the inkjet coating composition includes components in the form of particles, short wavelengths may be difficult to penetrate the coating film. Although it is preferable to use a photoinitiator having a characteristic, in the present invention, it is more preferable to mix and use a photoinitiator having a characteristic of initiating photopolymerization at a wavelength of 360 to 370 nm, which is a short wavelength region which helps to harden the surface.

The acrylic monomer is preferably an alkyl ester of acrylic acid, an alkyl ester of methacrylic acid or a mixture thereof, and the alkyl preferably has 18 or less carbon atoms. For example, the alkyl ester of acrylic acid is methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, butyl acrylate, isobutyl acrylate, t-butyl acrylate, pentyl acrylate, isopentyl acrylate, It may be selected from the group consisting of 2-ethylhexyl acrylate, isooctyl acrylate, nonyl acrylate, isononyl acrylate, dodecyl acrylate and stearyl acrylate, wherein the alkyl ester of methacrylic acid is methyl methacryl Elate, ethyl methacrylate, propyl methacrylate, isopropyl methacrylate, butyl methacrylate, isobutyl methacrylate, t-butyl methacrylate, pentyl methacrylate, isopentyl methacrylate, 2-ethyl Hexyl methacrylate, isooctyl methacrylate , Nonyl methacrylate, isononyl methacrylate, dodecyl methacrylate and stearyl methacrylate.

However, the present invention is not limited thereto, and the polyoxyethylene glycol monoacrylate-based, polypropylene glycol monoacrylic-based, polyoxyethylene glycol monomethacrylate-based, polypropylene glycol monomethacrylic-based, and acryl or methacryl side chains are cyclic. One or a mixture of two or more selected from the group consisting of acrylates and methacrylates having a structure may also be used, further preferably ethoxylated bisphenol A dimethacrylate, triethylene glycol dimethacrylate, 2- One or more selected from the group consisting of phenoxyethyl methacrylate, and isodecyl acrylate can be used.

The content of the acrylic monomer has a meaning in maintaining viscosity and physical properties in the environmental hormone decomposition inkjet coating composition of the present invention, when the content of the acrylic monomer is less than 25% by weight, the content of the ultraviolet curable acrylic oligomer is relatively increased. Since the viscosity becomes high and thus inkjet injection becomes difficult, and when the content of the acrylic monomer exceeds 70% by weight, there is a problem that the physical properties of the coating film after spraying the inkjet coating composition.

UV curable acrylic oligomers that can be used in the present invention preferably have a weight average molecular weight of 1,000 to 3,000, when the weight average molecular weight is less than 1,000, the degree of curing may increase, the workability of the coating film after curing may be weak, the adhesion of the coating film Deterioration may occur. On the other hand, when the weight average molecular weight exceeds 3,000, the viscosity is rapidly increased and workability is degraded, or a problem may occur in curing due to a decrease in the degree of curing.

It is preferable that an ultraviolet curable acryl oligomer consists of alkyl ester of acrylic acid, alkyl ester of methacrylic acid, or a mixture of these, and it is preferable that the said alkyl is C18 or less. Therefore, it is preferable that the above-mentioned acrylic monomer is a polymerized oligomer. More specifically, it may be a polyester acrylate oligomer. For example, the ultraviolet curable acrylic oligomer may be commercially available from CN230, CN2301 and CN384 available from SARTOMER; It may be one or more selected from Cytec's EB81, EB893, EB113 and EB83.

The content of the ultraviolet curable acrylic oligomer is preferably 2 to 30% by weight based on the total weight of the coating composition, and when the content is less than 2% by weight, the processability of the coating film after inkjet coating becomes brittle or the process film is brittle. There is a problem that a defect occurs, and when included in excess of 30% by weight, the viscosity of the inkjet coating composition is too high, there is a problem that a problem occurs during inkjet spraying.

Furthermore, the environmental hormone degrading inkjet coating composition of the present invention preferably further comprises a dispersant. By further including the dispersant, as shown in FIG. 3, the same charges are applied to the surface of the photocatalyst and the phytoncide capsule, and the particles and particles are kept constant by the electrostatic repulsive force to impart the effect of not being aggregated with each other. It is possible to increase the dispersibility. In addition, as shown in Figure 4, by adsorbing a compound containing a long chain having affinity with the TiO ₂ or phytoncide capsule on the TiO ₂ or phytoncide capsule surface, it is possible to suppress aggregation due to steric hindrance between particles. have.

At this time, the dispersant that can be used is not particularly limited, for example, BYK-P104, DISPERBYK-2091, DISPERBYK-2090, DISPERBYK-160, DISPERBYK-170, DISPERBYK-180, such as BYK Chemie (Chemie) Can be.

On the other hand, the viscosity of the environmental hormone degradation inkjet coating composition is preferably in the range of 20 to 25 ℃, 1 to 50cp (centipose), more preferably 3 to 10cp. Specifically, when the viscosity of the coating composition exceeds 50cp, inkjet injection of the coating composition is difficult, there is a problem that is difficult to commercialize.

In another aspect of the present invention, the present invention provides a method for producing a coated steel sheet using the environmental hormone degradation inkjet coating composition of the present invention as described above.

More specifically, the method for producing a coated steel sheet coated with the environmental hormone degrading inkjet coating composition of the present invention may include providing a steel sheet; On at least one side of the steel sheet, based on the total weight of the coating composition, 2 to 30% by weight UV curable acrylic oligomer, 25 to 70% by weight acrylic monomer, 0.5 to 10% by weight photoinitiator, 1 to 30% by weight photocatalyst, and the inside Inkjet spraying an environmental hormone degrading inkjet coating composition comprising 0.01-5% by weight of an phytoncide capsule comprising phytoncide, TiO ₂ and metal; And forming a magnetic field over the sprayed coating composition to move the phytoncide capsule above the coating layer.

In the method of manufacturing a coated steel sheet coated with the environmental hormone degrading inkjet coating composition of the present invention, the content and content of the environmental hormone degrading inkjet composition are the same as described above with reference to the environmental hormone degrading inkjet composition.

On the other hand, when coating the steel sheet using a method such as conventional roll coating or non-contact curtain coating used in the production of the coated steel sheet, the material used to decompose environmental hormones is difficult to be uniformly dispersed on the surface of the steel sheet, and shifted to one side May occur. In particular, in the case of roll coating, since the coating is carried out at a very high pressure, when applied to the present invention, the phytoncide capsule is damaged by the roll pressure.

However, according to the present invention, by applying the environmental hormone decomposing inkjet coating composition to the steel sheet through the inkjet spraying, an appropriate amount of ink is sprayed in a predetermined region, it is possible to uniformly disperse, as a result can exhibit a uniform effect.

In this case, the spraying step is preferably performed so that the sum of the phytoncide capsule and the photocatalyst is contained in one droplet of 1 to 100, the coating when the sum of the phytoncide capsule and the photocatalyst exceeds 100 in one droplet There exists a problem that the rigidity of a coating film falls and the phenomenon which a coating film crumbles occurs.

Further, the spraying step is preferably performed so that at least 10 droplets per area of 1 cm ² of the steel sheet. When less than 10 droplets are sprayed per area of 1 cm ² of steel sheet, there is a problem that the adsorption and decomposition effects of environmental hormone substances are insufficient. On the other hand, the maximum number of droplets per 1 cm ² of steel sheet is not particularly limited, but if it exceeds 10,000, the use of excess droplets is meaningless and economical since the resolution of environmental hormones does not improve anymore and remains constant. It is preferably included in less than 10,000.

In addition, the steel sheet which can be used for the coated steel sheet of the present invention is preferably a galvanized steel sheet, a stainless steel sheet, an aluminum steel sheet, a magnesium steel sheet, or the like, but is not particularly limited thereto.

On the other hand, the method for producing a coated steel sheet coated with an environmental hormone degrading inkjet coating composition of the present invention, after the inkjet spraying the environmental hormone decomposition inkjet coating composition on the surface of the steel sheet, by forming a magnetic field on the sprayed coating composition, the phytoncide capsule Moving to the top of the coating layer. In this case, by the magnetic field, the metal contained in the phytoncide capsule is in response to the magnetic field, the phytoncide capsule is moved to the upper coating layer, thereby maximizing the diffusion of the phytoncide contained in the phytoncide capsule. Furthermore, by including a metal in the phytoncide capsule, it is possible to obtain an effect of improving the electrical conductivity.

Furthermore, according to the present invention, a steel sheet and a coating layer formed on at least one surface of the steel sheet, the coating layer based on the total weight of the coating composition, UV curable acrylic oligomer 2 to 30% by weight, acrylic monomer 25 to 70% by weight A coating composition comprising 0.5 to 10% by weight of a photoinitiator, 1 to 30% by weight of a photocatalyst, and 0.01 to 5% by weight of a phytoncide capsule including phytoncide, TiO _2, and a metal, wherein the phytoncide capsule is formed of the coating layer. Located at the top, there is provided a coated steel sheet coated with an environmental hormonal degradation inkjet composition.

In this case, the phytoncide capsule may have a porous structure, and thus, phytoncide, TiO _2, etc. contained in the phytoncide capsule may be released from the capsule more easily, thereby decomposing the environmental hormone. Can be further improved.

Hereinafter, the present invention will be described in more detail with reference to specific examples. The following examples are merely examples to help understanding of the present invention, but the scope of the present invention is not limited thereto.

< Example  And Comparative example >

1. Preparation of Phytoncide Capsules

Capsules were prepared by a continuous emulsion polymerization method based on the capsule manufacturing method disclosed in Republic of Korea Patent Publication No. 2010-0108104. A carboxylic acid latex core was used as a seed to prepare a capsule surrounded by a hydrophobic polymer layer on the outside. The synthesized polymerized capsules consist of a bilayer consisting of an amphipathic inner layer and a hydrophobic outer wall layer. The main components of the polymer cell were methyl methacrylate and styrene, and triethanolamine was used as the amine-based corrosion inhibitor, and encapsulated during the polymerization process of the hydrophobic cell to increase the encapsulation efficiency. Triethanolamine was added at 1.37% by weight relative to the total weight of the core-hydrophobic cell. All compounds were used without purification and polymerization was carried out under nitrogen. In addition to this, the phytoncide, TiO ₂ , the metal and the low boiling wax are mixed, and the mixture is stirred at a high speed to uniformly disperse the phytoncide so that the wax is uniformly dispersed on the surface of the capsule, and inside the phytoncide, TiO ₂ and the metal Phytoncide capsules containing iron were formed.

Thereafter, the formed phytoncide capsule was heated to 100 ° C. to melt the wax, thereby preparing a phytoncide capsule having a porous structure.

2. Environmental hormone breakdown Inkjet  Preparation of Coating Composition

Based on the total weight of the coating composition, 20% by weight UV curable urethane acrylic oligomer, 60% by weight acrylic monomer, 10% by weight photoinitiator with a wavelength of 360 to 370 nm and 380 to 400 nm, 5% by weight photocatalyst and the phytoncide prepared above 5% by weight of the capsules were mixed and mixed at a speed of 1000 rpm in a high speed stirrer to prepare an environmental hormonal degradation inkjet coating composition.

3. Environmental hormone breakdown Inkjet  Preparation of coated steel sheet coated with the composition

The environmental hormone degrading inkjet coating composition was inkjet sprayed by changing the number of Droplets per 1 cm ² of the steel sheet surface to 1, 10, 100, 1,000, 10,000, 50,000.

Subsequently, before drying the coating layer sprayed with the coating composition, a magnetic field is formed on the coating layer as shown in FIG. 5 for a predetermined time, and the phytoncide capsule containing the metal is moved to the top of the coating layer by the magnetic field, followed by drying to coat the coated steel sheet. Was prepared.

< Experimental Example >

To test the environmental hormonal resolution of the coated steel sheet, 300 x 300 mm of inkjet sprayed coated specimens were placed at the bottom of a 5 liter gas bag, and then a formaldehyde (HCHO) gas, one of the environmental hormones, was used as a test gas. 2 hours after the injection, the concentration of formaldehyde gas present in the gas bag was measured.

Number of Droplets / cm 2		HCHO Decomposition (%)
Comparative Example 1	100 (Normal Ink)	Not disassembled
Comparative Example 2	One	Not disassembled
Example 1	10	20
Example 2	100	30
Example 3	500	70
Example 4	1,000	80
Example 5	10,000	over 90
Example 6	50,000	over 90

In Table 1, Comparative Example 1 uses a phytoncide capsule and a general ink containing no photocatalyst TiO ₂ .

As can be seen from the results of Examples 1 to 6 of Table 1, the present invention containing TiO ₂ particles and a phytoncide capsule as a photocatalyst is at least 10 in an area of 1 cm ² when the environmental hormone decomposing inkjet coating composition is sprayed onto the steel sheet by inkjet. If more than one drop (Droplet) is included, it can be seen that the effect of the adsorption and decomposition of environmental hormone (HCHO) material.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and changes can be made without departing from the technical spirit of the present invention described in the claims. It will be obvious to those of ordinary skill in the field.

Claims (17)

1. Based on the total weight of the coating composition,

   UV curable acrylic oligomer 2 to 30% by weight,

   25 to 70% by weight acrylic monomer,

   Photoinitiator 0.5-10 wt%,

   1 to 30% by weight photocatalyst, and

   Phytoncide therein, TiO _2, and environmental hormone decomposing the ink jet coating composition comprising 0.01 to 5% by weight of phytoncide capsule comprises a metal.
2. The environmental hormonal degradation inkjet coating composition of claim 1, wherein the phytoncide capsule has a porous structure.
3. The environmental hormonal degradation inkjet coating composition of claim 1, wherein the metal is at least one selected from the group consisting of iron, cobalt, and nickel.
4. The environmental hormone decomposition inkjet coating composition of claim 1, wherein the ultraviolet curable acrylic oligomer has a weight average molecular weight of 1,000 to 3,000.
5. The environmental hormone decomposing inkjet coating composition of claim 1, wherein the ultraviolet curable acrylic oligomer is composed of an alkyl ester of acrylic acid, an alkyl ester of methacrylic acid, or a mixture thereof, and the alkyl has 18 or less carbon atoms.
6. The environmental hormone degrading inkjet coating composition of claim 1, wherein the acrylic monomer is composed of an alkyl ester of acrylic acid, an alkyl ester of methacrylic acid, or a mixture thereof, and the alkyl has 18 or less carbon atoms.
7. The environmental hormone degrading inkjet coating composition of claim 1, wherein the photoinitiator has a property of initiating photopolymerization at a wavelength of 360 to 370 nm, 380 to 400 nm, or a mixture thereof.
8. The environmental hormone degrading inkjet coating composition of claim 1, wherein the photocatalyst is titanium dioxide (TiO ₂ ) having an average particle diameter greater than 0 and less than or equal to 100 nm responding to a wavelength of 300 to 420 nm.
9. The environmental hormonal degradation inkjet coating composition of claim 1, wherein the phytoncide capsule has an average particle diameter of 0.5 to 5 μm.
10. The environmental hormonal degradation inkjet coating composition of claim 1, wherein the environmental hormonal degradation inkjet coating composition further comprises a dispersant.
11. The environmental hormone degrading inkjet coating composition of claim 1, wherein the viscosity of the environmental hormone degrading inkjet coating composition is 1 to 50 cps in a temperature range of 20 to 25 ° C. 3.
12. Providing a steel sheet;

    On at least one side of the steel sheet, based on the total weight of the coating composition, 2 to 30% by weight UV curable acrylic oligomer, 25 to 70% by weight acrylic monomer, 0.5 to 10% by weight photoinitiator, 1 to 30% by weight photocatalyst, and the inside Inkjet spraying an environmental hormone degrading inkjet coating composition comprising 0.01-5% by weight of an phytoncide capsule comprising phytoncide, TiO ₂ and metal; And

    Forming a magnetic field over the sprayed coating composition to move the phytoncide capsule above the coating layer,

    A method for producing a coated steel sheet coated with an environmental hormonal degradation inkjet coating composition.
13. The method of claim 12, wherein the spraying is performed such that at least 10 droplets are sprayed per area of 1 cm ² of steel sheet.
14. The method of claim 12, wherein the spraying is performed such that the sum of the phytoncide capsule and the photocatalyst is included in one droplet in a range of 1 to 100. 13.
15. The method of claim 12, wherein the steel sheet is a galvanized steel sheet, a stainless steel sheet, an aluminum steel sheet, or a magnesium steel sheet.
16. Steel plate; And

    It includes a coating layer formed on at least one side of the steel sheet,

    The coating layer is based on the total weight of the coating composition, UV curable acrylic oligomer 2 to 30% by weight, acrylic monomer 25 to 70% by weight, photoinitiator 0.5 to 10% by weight, photocatalyst 1 to 30% by weight, phytoncide, TiO inside ₂ and a coating composition comprising 0.01 to 5% by weight of a phytoncide capsule comprising a metal,

    The phytoncide capsule is located on top of the coating layer, coated steel sheet coated with environmental hormone decomposition inkjet coating.
17. The coated steel sheet according to claim 16, wherein the phytoncide capsule has a porous structure.

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