KR20220088212A - Polymer composite resin coating composition having antibacterial and insect repellent properties, and steel sheet coated thereby - Google Patents

Abstract

The present invention provides a polymer composite resin coating composition exhibiting excellent antibacterial and insect repellency even in a small amount, including a host compound supported with a repellent, and a steel sheet coated with the composition, wherein the composition comprises a main resin, a curing agent and corrosion resistance a first composition comprising a crosslinking agent; and a second composition comprising a host compound that is cucubituril, cyclodextrin, or a mixture thereof, and a pest repellent supported on the host compound.

Description

Polymer composite resin coating composition having antibacterial and insect repellent properties, and steel sheet coated thereby}

The present invention relates to a composite resin coating composition having excellent antibacterial and insect repellency properties, and a steel sheet coated with the composition, specifically, a polymer composite resin coating composition showing excellent antibacterial and insect repellency while using a small amount of insect repellent, and the It relates to a steel sheet coated with a coating composition.

Conventionally, the resin coating solution having insect repellency used for building materials has low solution stability due to the poorly soluble insect repellent, so that the repellent is buried in the coating film during the manufacture of coated steel sheet, and insect repellency is not efficient.

For example, an insect repellent steel sheet manufactured using an insect repellent resin composition including an insect repellent is described as in Korean Patent No. 1313406 No. 1313406. However, the pest repellent as described above has poor solubility, and has low solution stability, so when the resin composition is applied to a steel sheet, the pest repellent is buried inside the coating layer, thereby preventing effective insect repellency. may occur. In particular, PCM (Pre-Coated Metal) coated steel sheet containing pest repellents has a disadvantage in that the coating film is applied in a thick thickness, and even if a large amount of pest repellent is added, it is buried inside the coating film, so the repellent performance is bad.

Moreover, since repellents usually have poor solubility, these repellents cannot be added to the water-soluble coating solution, so that not only cannot provide insect repellent performance to the steel sheet, but also the water-soluble coating solution easily gels even when added. It has a disadvantage that it causes problems during storage because it is low.

An object of the present invention is to provide a polymer composite resin coating composition that exhibits excellent antibacterial and insect repellency even when a small amount of repellent is used, and a steel sheet coated with the coating composition.

In one aspect of the present invention, the present invention provides a first composition comprising a main resin, a curing agent, and a corrosion-resistant crosslinking agent; And Cucubituril, cyclodextrin, or a mixture thereof, a host compound and a second composition comprising a pest repellent supported on the host compound is mixed, it provides a polymer composite resin coating composition.

In another aspect of the present invention, the present invention provides a steel sheet and a composite resin coated steel sheet coated with the polymer composite resin coating composition of the present invention on at least one surface of the steel sheet.

The polymer composite resin coating composition of the present invention has excellent solution stability and can provide excellent antibacterial and insect repellent properties even with a small amount of repellent compared to the prior art.

In addition, since the steel sheet coated with the polymer composite resin coating composition of the present invention has excellent corrosion resistance, press workability, and antibacterial and insect repellency, it is used for panels in the field of building materials, specifically, facilities such as heating, ventilation, and air conditioning. It can be used as a panel for an air conditioning system.

1 is a schematic diagram schematically showing a structure in which a pest repellent is supported on a host compound.
Figure 2 is a perspective view schematically showing the layer structure of the composite resin coated steel sheet coated with the polymer composite resin coating composition of the present invention.
3 is a graph showing the results of evaluating the durability of the repelling performance of the coating layer for the composite resin steel sheet formed of the polymer composite resin coating composition of Examples 5, 10, 15, 20 and Comparative Example 2;
4 is a graph showing the evaluation results of long-term sustainability of the composite resin steel sheet formed of the polymer composite resin coating composition of Example 20 and Comparative Example 4 of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiment 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.

The present invention provides a polymer composite resin coating composition that can provide excellent antibacterial and insect repellent properties even with a small amount of repellent compared to the prior art, and a steel sheet coated with the coating composition.

Specifically, the polymer composite resin coating composition of the present invention includes a first composition for forming a coating layer on a steel sheet and a second composition providing antibacterial and insect repellent performance to the first composition.

The first composition forms a polymer composite resin coating layer on the steel sheet, and includes a main resin, a curing agent, a corrosion-resistant crosslinking agent, and pure water.

The main resin may be an epoxy-modified urethane polymer resin, a urethane polymer resin, or a mixture thereof. In this case, as the main resin, a gel permeation chromatography (GPC) method having a number average molecular weight of 2,000 to 20,000 may be used. When the number average molecular weight of the main resin is less than 2,000, the solvent resistance and processability of the coating film are insufficient, and when the molecular weight exceeds 20,000, the storage stability of the solution is lowered, which is not preferable in terms of workability. More preferably, as the main resin, one having a number average molecular weight of 3,000 to 15,000 may be used.

The main resin may be included in an amount of 5 to 50% by weight, preferably 10 to 30% by weight, based on the total weight of the first composition. If the content of the main resin is less than 5% by weight, the coating film is not densely formed, so there may be a problem of lowering adhesion. have.

The curing agent may be a melamine-based curing agent, for example, melamine, butoxymethyl melamine, isopropoxymethyl melamine, hexamethoxymethyl melamine, hexaethoxymethyl melamine, trimethoxymethyl melamine and triethoxymethyl melamine. It may be at least one selected from the group consisting of, but is not limited thereto.

The curing agent may be included in an amount of 1 to 20% by weight, preferably 5 to 10% by weight, based on the total weight of the first composition. If the content of the curing agent is less than 1% by weight, the degree of curing of the coating film is too low, and there may be a problem that the coating film is not dense.

The corrosion-resistant crosslinking agent may be a silane-based compound, a titanium compound, a zirconium compound, or a mixture thereof, for example, the silane-based compound is gamma-glycidoxypropyltrimethoxysilane, gamma-glycidoxypropylmethyldie It may be any one of oxysilane, gamma-aminopropyltrimethoxysilane, gamma-aminopropyltriethoxysilane, and gamma-aminopropylmethyldimethoxysilane, and the titanium compound is isopropylditriethanolamino titanium, titanium lactate. It may be any one of chelate and titanium acetylacetonate, and the zirconium compound may be any one of isopropylditriethanolamino zirconium, lactic acid zirconium chelate, and zirconium acetylacetonate, but is not limited thereto.

In this case, the corrosion-resistant crosslinking agent may be included in an amount of 1 to 15% by weight, preferably 3 to 5% by weight, based on the total weight of the first composition. If the content of the corrosion-resistant crosslinking agent is less than 1% by weight, there may be a problem that the effect of strengthening the corrosion resistance is low, and if it exceeds 15% by weight, it is not preferable due to an excessive increase in manufacturing cost.

Meanwhile, the first composition includes water as a solvent in the balance. The water is not particularly limited, but pure water such as purified water or deionized water may be used.

The second composition provides antibacterial and insect repellent performance to the coating layer formed by the first composition, and includes a pest repellent and a host compound and a solvent on which the pest repellent is supported.

The pest repellent may be a pyrethroid-based pest repellent. The pyrethroid-based repellents include allethrins, bifenthrin, bioallethrin, cyfluthrin, cyhalothrin, cypermethrin, cype. Cyphenothrin, Deltamethrin, Empenthrin, Imiprothrin, Metofluthrin, Permethrin, Phenothrin, Pyrethrin ( Pyrethrin), resmethrin, tetramethrin, etc. may be used, and any one of these may be used alone, or two or more types may be mixed and used.

The pest repellent may be included in an amount of 0.0001 to 0.5% by weight, preferably 0.001 to 0.2% by weight, based on the total weight of the second composition. When the content of the corrosion-resistant crosslinking agent is less than 0.0001 wt%, there is little effect of antibacterial and insect repellent, and when it exceeds 0.5 wt%, excessive increase in manufacturing cost and safety problems may occur when in contact with the skin.

The host compound serves as a kind of carrier for supporting the pest repellent. Since the pest repellent is supported in the host compound, the pest repellent is gradually released from the host compound for a long time during use of the steel sheet, thereby providing antibacterial and insect repellent properties. In addition, by maintaining the dispersibility of the pest repellent in the aqueous solution, it provides solution stability of the polymer composite resin coating composition, thereby preventing the composition from gelling during storage, and providing corrosion resistance to the steel sheet. Furthermore, when the polymer composite resin coating composition is coated on the steel sheet, it helps the repellent to float to the surface of the coating layer, thereby effectively exhibiting antibacterial and insect repellent properties.

As the host compound, a cucubituryl compound or a cyclodextrin compound may be used, and a mixture thereof may be used. The cucubituril compound is specifically, cucubit[5]uril, cucubit[6]uril, cucubit[7]uril, cucubit[8]uril, cucubit[10]uril and cucubit[14]uril It may be at least one selected from the group consisting of, and the cyclodextrin compound may be at least one selected from the group consisting of α-cyclodextrin, β-cyclodextrin, and γ-cyclodextrin. The structure of the host compound is shown as follows.

As shown above, the host compound has a structure in the form of a cage, so that the pest repellent may be supported in the host compound. The concept in which the pest repellent is supported in the host compound is schematically shown in FIG. 1 . Accordingly, even if the poorly water-soluble pest repellent is mixed with the water-soluble first composition, the pest repellent can be stably dispersed and present.

The host compound may be included in an amount of 1 to 5% by weight, preferably 2 to 4% by weight, based on the total weight of the second composition. When the content of the host compound is less than 1% by weight, a large amount of pest repellent is present without being supported on the host compound, and when the polymer composite resin coating composition of the present invention is coated on a steel plate, most of the pest repellent is of the coating layer. By concentrating on the surface layer, in a process in which heat is applied, such as a curing reaction, the insect repellent in the surface layer is vaporized and a large amount can be released from the host compound. If it exceeds, the coating film is too hard and there may be a problem that the corrosion resistance deteriorates.

The polymer composite resin coating composition of the present invention is a mixture of the first composition and the second composition, and the second composition may be mixed in a weight ratio of 1 to 30 with respect to 100 by weight of the first composition. When the mixing ratio of the second composition to the first composition is less than 1, the amount of the repellent compound is small and it is difficult to exhibit insect repellent performance. .

The second composition includes a solvent as the balance, and the solvent is an alcohol component, specifically, methanol, ethanol, propanol, isopropanol, butanol, pentanol, phenol, hexanol and cyclo for dissolving a pest repellent that is poorly soluble in water. At least one selected from the group consisting of hexanol may be used.

The polymer composite resin coating composition of the present invention is obtained by adding the second composition to the first composition, and by coating the obtained polymer composite resin coating composition on the surface of the steel plate, a steel plate having antibacterial and insect repellency can be obtained.

In order to secure workability in coating the polymer composite resin coating composition on the surface of a steel sheet, and furthermore, to easily control the amount of film adhesion, when measured with a Brookfield viscometer, having a viscosity in the range of 5 to 100 cps desirable. If the viscosity of the polymer composite resin coating composition of the present invention is less than 5 cps, a problem of uniform coating may occur, and if it exceeds 100 cps, there may be a problem that the coating is not performed smoothly. It is desirable to control the viscosity.

If the viscosity of the above range is not reached, a solvent may be additionally added to control the viscosity of the polymer composite resin coating composition, if necessary. As the solvent added for viscosity control, the solvent used in any one of the first composition and the second composition may be used, and water, methanol, ethanol, propanol, isopropanol, butanol, pentanol, phenol, hexanol and cyclo At least one selected from the group consisting of hexanol may be used.

Specifically, the viscosity of the polymer composite resin coating composition may be in a range where the solid content in the composition is 5 to 30% by weight, preferably 5 to 20% by weight, and when it has a solid content in the above range, It is possible to secure excellent workability, such as being able to easily control the amount of adhesion during manufacturing, along with corrosion resistance, workability, antibacterial and insect repellency to the steel sheet.

On the other hand, the present invention is a steel plate; And it provides a steel plate comprising a composite resin coating layer by the polymer composite resin coating composition of the present invention on at least one surface of the steel plate.

That is, the composite resin coating layer can be formed by applying the polymer composite resin coating composition of the present invention to one or both surfaces of the steel sheet. The steel sheet may be a galvanized steel sheet, for example, Al-45%Zn, Al-8%Zn-0.3%Si, Zn-1.5%Al-1.5%Mg, and Zn-2.5%Al-3.0% It may be any one of Mg hot-dip galvanized steel sheet.

The composite resin coating layer preferably has a thickness of 0.1 to 5 μm, preferably 0.3 to 3 μm, after drying. If the thickness of the composite resin coating layer is less than 0.1 μm, the corrosion resistance and press workability of the composite resin coating layer are poor.

The polymer composite resin coating composition is a method generally known in the art, for example, although not particularly limited, dipping, spraying, bar-coater, roll coater, slot-die coating or curtain coater method is applied. Thus, it can be coated on one or both sides of the steel sheet, or on the undercoating film. For example, the steel sheet provided by the present invention may have a structure as shown in FIG. 2 .

After coating the polymer composite resin coating composition of the present invention on a steel plate, it may include drying in a conventional manner. The drying method is not particularly limited, and any method generally known in the art may be used, for example, a hot air heating method, an infrared and near-infrared heating method, or an induction heating method.

Preferably, the drying is performed at 80-200° C. by PMT (Peak Metal Temperature). For example, when drying is performed using a hot air heating method, the polymer composite resin coating composition of the present invention may be dried by hot air treatment at an atmospheric temperature of 200 to 340° C. for 5 to 50 seconds. In the case of induction heating, it can be dried for 5 to 20 seconds under the conditions of a frequency range of 5 to 50 MHz and a power of 3 to 15 KW.

Hereinafter, the present invention will be described in more detail through specific examples. The following examples are only examples to help the understanding of the present invention, and the scope of the present invention is not limited thereto.

Example

The polymer composite resin coating composition of the present invention was prepared as follows.

A first composition was prepared by mixing an epoxy-modified urethane resin as the main resin (number average molecular weight is 6000, Tg=10° C.), ethoxymethyl melamine as a curing agent, and titanium triethanolamine isoproposide and pure water as a corrosion-resistant crosslinking agent. Furthermore, a second composition was prepared using λ-cyhalothrin as a pest repellent, Cucubit[8]uril as a host compound, and water as a solvent.

The first composition and the second composition were mixed in a weight ratio of 10:2 to prepare a polymer composite resin coating composition of the present invention as follows. Table 1 below shows the component content in the prepared polymer composite resin coating composition.

1st composition (wt%) Second composition (wt%) solid content
(weight%) topic
Suzy hardener Corrosion-resistant crosslinking agent pure pest
repellent host
compound menstruum Example 1 10 2 One 87 0.0001 One 98.9999 14 Example 2 10 2 One 87 0.0005 One 98.9995 14 Example 3 10 2 One 87 0.001 One 98.999 14 Example 4 10 2 One 87 0.0001 2 97.9999 15 Example 5 10 2 One 87 0.0005 2 97.9995 15 Example 6 10 2 One 87 0.001 2 97.999 15 Example 7 10 2 2 86 0.0001 One 98.9999 15 Example 8 10 2 2 86 0.0005 One 98.9995 15 Example 9 10 2 2 86 0.001 One 98.999 15 Example 10 10 2 2 86 0.0001 2 97.9999 16 Example 11 10 2 2 86 0.0005 2 97.9995 16 Example 12 10 2 2 86 0.001 2 97.999 16 Example 13 10 4 One 85 0.0001 One 98.9999 16 Example 14 10 4 One 85 0.0005 One 98.9995 16 Example 15 10 4 One 85 0.001 One 98.999 16 Example 16 10 4 One 85 0.0001 2 97.9999 17 Example 17 10 4 One 85 0.0005 2 97.9995 17 Example 18 10 4 One 85 0.001 2 97.999 17 Example 19 10 4 2 84 0.0001 One 98.9999 17 Example 20 10 4 2 84 0.0005 One 98.9995 17 Example 21 10 4 2 84 0.001 One 98.999 17 Example 22 10 4 2 84 0.0001 2 97.9999 18 Example 23 10 4 2 84 0.0005 2 97.9995 18 Example 24 10 4 2 84 0.001 2 97.999 18 Comparative Example 1 10 2 One 87 0 2 98 15 Comparative Example 2 10 2 2 86 0.0005 0 99.9995 14 Comparative Example 3 10 4 One 85 0 2 98 17 Comparative Example 4 10 4 2 84 0.001 0 99.999 16

Solution stability was evaluated for each of the polymer composite resin coating compositions prepared above, and the results are shown in Table 2. (Single-sided coating amount 40-200 g/m ² ) Roll-coated to a dry film thickness of 0.3 to 2 μm, baked and dried at PMT=170° C., and cooled to prepare a composite resin coated steel sheet.

For the obtained steel sheet, corrosion resistance, workability, Antibacterial, antifungal and insect repellency were evaluated, and the results are shown in Table 2.

solution stability, corrosion resistance, processability, Antibacterial, antifungal and insect repellent evaluation methods and evaluation criteria are as follows.

<Solution stability>

After the composition was stored at room temperature for 30 days, the occurrence of gelation was observed, and the viscosity increase was measured and evaluated according to the following criteria.

◎: When the gelation phenomenon does not occur and the increase in viscosity is less than 5%

○: When the gelation phenomenon does not occur, but the viscosity increase is 5% or more and less than 10%

△: When the gelation phenomenon does not occur, but the viscosity increase is 10% or more and less than 20%

×: When a gelation phenomenon occurs or the viscosity increase is 20% or more

<Corrosion resistance>

Using a salt spray device (Japanese Industrial Standard Test Method JIS E2731) on a steel plate specimen, spraying 5% salt water at 35°C at a spray pressure of 1Kg/m ² to the steel plate, and then 120 hours after lapse of white rust area % was measured and evaluated according to the following criteria.

◎: When white rust does not occur

○: In case of less than 5% of white rust area

△: When the white rust area is 5% or more and less than 20%

×: In the case of 20% or more of the white rust area

<Bending part workability>

After bending the surface of the composite resin coated steel sheet 180°, put it in a vise and tighten it until it becomes flat (0T-bending). Observation and evaluation were made according to the following criteria.

◎; No peeling or cracking

○: No peeling but fine cracks

△: fine point peeling

×: film peeling

<Antibacterial and antifungal properties>

According to the standard test method (KCL FIR-1003:2011) at the Korea Institute of Construction and Living Environment, 3 types of bacteria (Escherichia coli., Pseudomonas aeruginosa, Staphylococcus aureus) and 5 types of fungi (Aspergillus niger, Penicillium pinophilum, Chaetomium globosum, Gliocladium virens, Aureobasidium pullulans). After inoculation of the fungal strain on the surface of a steel plate (size 50 × 50 mm), the growth area rate of the fungal mycelium was measured at 4 weeks, and evaluated according to the following criteria.

◎: The area of the mycelial growth part in the inoculation part of the test piece is less than 3% of the total area

○: The area of the mycelial growth part in the inoculation part of the test piece is 3% or more and less than 10% of the total area

△: The area of the mycelial growth part in the inoculated part of the test piece is 10% or more and less than 20% of the total area

×: The area of the mycelial growth part in the inoculated part of the test piece is 20% or more of the total area

<Insect repellency>

Two square composite resin coated steel sheets (one side length 80mm) obtained in each Example and Comparative Example and two square composite resin coated steel sheets (one side length 80mm) coated with only the first composition of Example 1 Each was prepared as a raw steel plate (control material).

Make a device with dimensions of 300mm×300mm×50mm in width×length×height, make and place a shelter of 80mm×80mm×10mm at each corner, and make a shelter of 20mm×10mm at the entrance. A pest repelling performance evaluation device that allows cockroaches to move was manufactured.

A coated steel sheet and a comparative steel sheet were placed in each diagonal direction of the pest repelling performance evaluation device, and 1 sugar cube (5 g) was placed on the steel sheet, and a water-soaked cotton wool was placed in the center of the pest repelling performance evaluation device.

20 German cockroaches (Chabanegoburi) were placed in the manufactured device and observed through a video camera for 24 hours. Camera photos were taken every hour, and insect repellency was calculated using the following formula.

Insect repelling performance (%) = [Number of objects on control plate - Number of individuals on coated steel plate] × 100 / Number of individuals on control plate

Table 2 shows the insect repellency performance after 24 hours. On the other hand, for Comparative Example 2, Examples 5, 10, 15 and 20, insect repellency performance over time is shown in FIG. 3 .

In FIG. 3, the X-axis represents time (Hr), and the Y-axis represents insect repellency (%).

division use
composition Coating amount (g/m ² ) quality characteristics solution
stability corrosion resistance machinability antibacterial antifungal insect repellent Experimental Example 1 Example 1 0.5 ◎ ◎ ◎ ◎ ◎ 90< Experimental Example 2 Example 2 1.0 ◎ ◎ ◎ ◎ ◎ 95< Experimental Example 3 Example 3 2.0 ◎ ◎ ◎ ◎ ◎ 95< Experimental Example 4 Example 4 0.5 ◎ ◎ ◎ ◎ ◎ 90< Experimental Example 5 Example 5 1.0 ◎ ◎ ◎ ◎ ◎ 95< Experimental Example 6 Example 6 2.0 ◎ ◎ ◎ ◎ ◎ 95< Experimental Example 7 Example 7 0.5 ◎ ◎ ◎ ◎ ◎ 90< Experimental Example 8 Example 8 1.0 ◎ ◎ ◎ ◎ ◎ 95< Experimental Example 9 Example 9 2.0 ◎ ◎ ◎ ◎ ◎ 95< Experimental Example 10 Example 10 0.5 ◎ ◎ ◎ ◎ ◎ 90< Experimental Example 11 Example 11 1.0 ◎ ◎ ◎ ◎ ◎ 95< Experimental Example 12 Example 12 2.0 ◎ ◎ ◎ ◎ ◎ 95< Experimental Example 13 Example 13 0.5 ◎ ◎ ◎ ◎ ◎ 90< Experimental Example 14 Example 14 1.0 ◎ ◎ ◎ ◎ ◎ 95< Experimental Example 15 Example 15 2.0 ◎ ◎ ◎ ◎ ◎ 95< Experimental Example 16 Example 16 0.5 ◎ ◎ ◎ ◎ ◎ 90< Experimental Example 17 Example 17 1.0 ◎ ◎ ◎ ◎ ◎ 95< Experimental Example 18 Example 18 2.0 ◎ ◎ ◎ ◎ ◎ 95< Experimental Example 19 Example 19 0.5 ◎ ◎ ◎ ◎ ◎ 90< Experimental Example 20 Example 20 1.0 ◎ ◎ ◎ ◎ ◎ 95< Experimental Example 21 Example 21 2.0 ◎ ◎ ◎ ◎ ◎ 95< Experimental Example 22 Example 22 0.5 ◎ ◎ ◎ ◎ ◎ 90< Experimental Example 23 Example 23 1.0 ◎ ◎ ◎ ◎ ◎ 95< Experimental Example 24 Example 24 2.0 ◎ ◎ ◎ ◎ ◎ 95< Comparative Experimental Example 1 Comparative Example 1 0.5 ◎ △ △ × × 0 Comparative Experimental Example 2 Comparative Example 2 1.0 △ ◎ ◎ × × 0 Comparative Experimental Example 3 Comparative Example 3 2.0 ◎ △ △ × × 0 Comparative Experimental Example 4 Comparative Example 4 1.0 △ ◎ ◎ × × 0

As shown in Table 2, it was confirmed that the composite resin coated steel sheet including the coating layer by the polymer composite resin coating composition of the present invention exhibited excellent corrosion resistance and workability, as well as antibacterial and insect repellency properties. In particular, it was confirmed that excellent repellent performance was exhibited by the repellent floating on the surface of the coating layer even though the repellent content was small. In addition, from Figure 3, the steel sheet of Comparative Example 2 showed a result that the insect repellency performance decreased after 3 hours, and the insect repellency performance was almost lost after 8 hours, but the steel sheets of Examples 5, 10, 15 and 20 were It exhibited an insect repellency of 95% or more after 24 hours, showing a remarkably excellent insect repellent effect.

<Persistence>

After leaving the composite resin coated steel sheet having a coating layer formed by the polymer composite resin coating composition of the present invention at 60 °C and 80% relative humidity for 4 months, the insect repellency was evaluated in the same manner as above to confirm the durability, and the result is shown in FIG. 3 .

As a result, as shown in FIG. 4, it was confirmed that the polymer composite resin coating composition of the present invention corresponding to the Example was excellent in durability, but the composition corresponding to the Comparative Example was significantly inferior in durability.

This result is considered to be because the repellent supported on the host compound is stably present even after a long period of time. Therefore, according to the evaluation results, it is determined that the composite resin coated steel sheet having a coating layer formed by the polymer composite resin coating composition of the present invention can exhibit antibacterial properties and insect repellency for at least 10 years.

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 variations are possible within the scope without departing from the technical spirit of the present invention described in the claims. It will be apparent to those of ordinary skill in the art.

Claims (17)

a first composition comprising a main resin, a curing agent, and a corrosion-resistant crosslinking agent; and
a second composition comprising a host compound that is cucubituril, cyclodextrin, or a mixture thereof, and a pest repellent supported on the host compound;
A polymer composite resin coating composition comprising a. The polymer composite resin coating composition according to claim 1, wherein the main resin is an epoxy-modified urethane polymer resin, a urethane polymer resin, or a mixture thereof. The polymer composite resin coating composition according to claim 1, wherein the main resin has a number average molecular weight of 2,000 to 20,000. The curing agent of claim 1, wherein the curing agent is selected from the group consisting of melamine, butoxymethyl melamine, isopropoxymethyl melamine, hexamethoxymethyl melamine, hexaethoxymethyl melamine, trimethoxymethyl melamine and triethoxymethyl melamine. At least one of which is a polymer composite resin coating composition. The method of claim 1, wherein the corrosion-resistant crosslinking agent is gamma-glycidoxypropyltrimethoxysilane, gamma-glycidoxypropylmethyldiethoxysilane, gamma-aminopropyltrimethoxysilane, gamma-aminopropyltriethoxysilane and gamma-aminopropylmethyldimethoxysilane, which is any one of a silane-based compound, isopropylditriethanolamino titanium, lactic acid titanium chelate, and titanium acetylacetonate, which is any one of a titanium compound, isopropylditriethanolamino zirconium, and zirconium lactate. At least one selected from the group consisting of a chelate and a zirconium compound that is any one of zirconium acetylacetonate, a polymer composite resin coating composition. According to claim 1, wherein the pest repellent is allethrin (Allethrins), bifenthrin (Bifenthrin), bio allethrin (Bioallethrin), cyfluthrin (Cyfluthrin), cyhalothrin (Cyhalothrin), cypermethrin (Cypermethrin) , Cyphenothrin, Deltamethrin, Empenthrin, Imiprothrin, Metofluthrin, Permethrin, Phenothrin, At least one pyrethroid-based compound selected from the group consisting of pyrethrin, resmethrin, and tetramethrin, a polymer composite resin coating composition. According to claim 1, wherein the cucubituril is cucubit[5]uril, cucubit[6]uril, cucubit[7]uril, cucubit[8]uril, cucubit[10]uril, and cucubit[ 14] at least one selected from the group consisting of uril, and the cyclodextrin is at least one selected from the group consisting of α-cyclodextrin, β-cyclodextrin, and γ-cyclodextrin, polymer composite resin coating composition. The polymer composite resin coating composition according to claim 1, wherein the first composition comprises 5 to 50% by weight of the main resin, 1 to 20% by weight of the curing agent, and 1 to 15% by weight of the corrosion-resistant crosslinking agent. The polymer composite resin coating composition of claim 1, wherein the second composition comprises 0.0001 to 0.5 wt% of a pest repellent, and 1 to 5 wt% of a host compound. The polymer composite resin coating composition according to claim 8, wherein the first composition further comprises the remainder of water. The method of claim 1, wherein the second composition further comprises a residual solvent, wherein the solvent is at least selected from the group consisting of methanol, ethanol, propanol, isopropanol, butanol, pentanol, phenol, hexanol, and cyclohexanol. One polymer composite resin coating composition. The polymer composite resin coating composition according to any one of claims 1 to 11, wherein the first composition and the second composition are mixed with the second composition in a weight ratio of 1 to 30 with respect to the first composition 100. The polymer composite resin coating composition according to claim 12, wherein the polymer composite resin coating composition has a solid content of 5 to 30% by weight. The polymer composite resin coating composition according to claim 12, wherein the polymer composite resin coating composition has a viscosity of 5 to 100 cps. galvanized steel; and
A composite resin coated steel sheet comprising a coating layer made of the polymer composite resin coating composition of any one of claims 1 to 9 on at least one surface of the galvanized steel sheet. The composite resin-coated steel sheet according to claim 15, wherein the coating layer of the polymer composite resin coating composition has a weight ratio of the second composition to the first composition 100 of 1 to 30. 16. The method of claim 15, wherein the galvanized steel sheet is Al-45%Zn, Al-8%Zn-0.3%Si, Zn-1.5%Al-1.5%Mg or Zn-2.5%Al-3.0%Mg galvanized layer Which includes, a composite resin coated steel sheet.

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