WO2018151573A1 - Aluminum tube coated with resin composition reinforced with antibacterial and deodorizing function and method for preparing same resin composition - Google Patents

Abstract

The present invention relates to an aluminum tube coated with a resin composition reinforced with antibacterial and deodorizing function and a method for preparing the same resin composition and, more specifically, to an aluminum tube coated with a resin composition reinforced with antibacterial and deodorizing function and a method for preparing the same resin composition, which are improved to purify water quality by coating an antimicrobial composition made of a ceramic material that is harmless to the human body on the inside and the outside of an aluminum water pipe to prevent bacterial growth in tap water.

Description

Aluminum tube coated with resin composition reinforced with antibacterial and deodorizing function and manufacturing method thereof

The present invention relates to an aluminum tube coated with a resin composition reinforced with an antibacterial and deodorizing function and a method for preparing the resin composition. More specifically, the present invention relates to a transition metal compound and a silicate mineral that are harmless to humans in order to prevent bacterial growth in tap water. The present invention relates to an aluminum tube coated with a resin composition reinforced with an antibacterial and deodorizing function, and to a method for producing the resin composition, which is configured to purify water quality by coating an antimicrobial composition comprising inside and outside of an aluminum water pipe.

Generally, water pipes mainly use pipes made of metal materials such as cast iron pipes, zinc pipes, and copper pipes, but these metal pipes are easily corroded by dissolved oxygen when used for a long time, causing leakage and scale.

In addition, since the corroded rust mixes with water to generate water droplets or white contaminants, this reduces water permeability.

In addition, these metal tubes are heavy, causing problems such as deterioration of workability due to heavy weight during installation and transportation.

Therefore, at present, a synthetic resin pipe mainly made of synthetic resins such as PE, PP, and PVC is used.

Synthetic resin tube has the advantage of being lightweight, easy to handle, easy to carry, and easy to connect or repair.

However, the synthetic resin pipe has a disadvantage of being easily damaged when external pressure is applied or winter due to low impact strength.

In addition, although synthetic resin pipes are used as water pipes, bacteria can grow on the inner wall of water pipes, either metal pipes or synthetic resin pipes, due to poor water quality due to contamination of the water supply and supply of tap water through the water pipes connected to the water purification plant. In many cases, it is difficult to remove harmful heavy metals even in the case of purified water.

As this approach reaches the limit of supplying raw water that is getting more polluted, the secondary pollution is prevented from the water pipe connected to each household from the water purification plant, and harmful heavy metals and bacteria contained in the tap water are Water quality improvement, which can be removed in the flow process, is desperately required.

Far-infrared rays are electromagnetic waves, a kind of energy waves, and light having a wavelength band in the range of 7 to 1000 µm. According to wavelengths, 0.76 to 1.5 µm is called near-infrared, 1.5 to 5.6 µm is called mid-infrared, and 5.6 to 1000 µm is called far-infrared. . Among them, far infrared rays of 7 ~ 20㎛ wavelength are known to be the most beneficial for our life.

Such far infrared rays are transmitted by radiation, and are characterized by resonating with wavelengths in a material and activating by resonance.

Therefore, far infrared rays are directly and instantaneously transmitted to an object without heating the intermediate medium, and unlike visible or near infrared rays, the infrared rays penetrate deeply into the body as well as the surface of the human body or material. Since the inside and outside are uniformly heated, efficient heating of paints, foods, and human bodies is possible.

Therefore, when irradiated with far infrared rays to a human body or an object, it is possible to heat in a short time without heat loss, it is excellent in energy saving effect.

In addition, the far-infrared rays of long wavelengths due to low temperature radiation not only give a soft heating sensation to the human body but also provide comfortable heating without generating noise and odor, and there is no risk of fire.

The effects of far-infrared rays on the human body include the increase of subcutaneous depth, the expansion of microvessels, the promotion of blood circulation, the strengthening of metabolism, the increase of tissue regeneration ability, and the excellent effect is also recognized for gynecological diseases, neurological diseases and senile diseases. have.

In addition, far infrared rays have the function of activating water molecules and controlling humidity, thereby inhibiting fungal or bacterial activity and removing odors caused by the growth of microorganisms. Nevertheless, these good qualities are not properly applied to water pipes.

The present invention has been made in view of the above-mentioned problems in the prior art, and has been created to solve this problem. In order to prevent bacterial growth in tap water, an antimicrobial composition comprising ceramic materials such as transition metal compounds and silicate minerals, which are harmless to the human body, is provided. The main object of the present invention is to provide an aluminum tube coated with a resin composition having an enhanced antibacterial and deodorizing function to be coated on the outside of the aluminum water pipe to purify the water quality, and a method of manufacturing the resin composition.

In order to solve the above problems, the present invention, one or two or more selected from butyl acrylate, methyl methacrylate, ethyl acrylate and methacrylic acid is placed in a polymerization unit maintained at 80-85 ℃, 40 minutes-2 Acrylic resin production step of producing an acrylic resin by stirring for a time to polymerize so that the average molecular weight is 20,000-30,000; Preparing a base polymer by reacting 0.05-1.5 parts by weight of a room temperature-curable crosslinking agent in which a metharol acrylamide and glycyryl methacrylate are mixed in a weight ratio of 1: 1 with respect to 100 parts by weight of the acrylic resin; Emulsion to prepare an emulsion solution by mixing 20-40 parts by weight of a transition metal compound, 20-40 parts by weight of silicate mineral, 20-50 parts by weight of water, and 5-20 parts by weight of sodium lauryl sulfate as an emulsifier. Solution preparation step; Polycarbodiimide, a carbodiimide crosslinking agent, based on 100 parts by weight of an acrylic mixed monomer containing butyl acrylate, ethyl acrylate, ethyl methacrylate, methacrylate, methyl methacrylate, and ethylhexyl acrylate, 0.05-0.15 An acrylic mixed monomer solution preparing step of preparing an acrylic mixed monomer solution by mixing parts by weight, 0.03-0.1 parts by weight of a polymerization initiator, and 60-90 parts by weight of water; Injecting the emulsion solution into the polymerization reactor, while heating the resin composition for the aluminum tube coating to prepare a resin composition for coating the aluminum tube by adding 150-250 parts by weight of the acrylic mixed monomer solution to 100 parts by weight of the emulsion solution. Polymerization step; Characterized in that comprises a.

In another aspect of the present invention, a resin composition prepared by the method for preparing a resin composition for coating an aluminum tube is coated on the inner circumferential surface of the aluminum tube tube body, thereby providing an aluminum tube coated with a resin composition having enhanced antibacterial and deodorizing function.

According to the present invention, in the water pipe made of aluminum, the coating layer is coated on an aluminum tube with an excellent adhesive force capable of withstanding at 25 degrees of salinity of a resin composition, which is an antimicrobial substance containing ceramics such as transition metal compounds and silicate minerals that are harmless to the human body on the inner diameter side. It eliminates germs in tap water, purifies water by suppressing germ growth, converts water into soft water through transition metal compounds, and implements a light and sanitary water pipe function by constructing an aluminum pipe as a pipe body. It is possible to obtain an effect.

1 is an exemplary partial cross-sectional perspective view of an aluminum tube coated with a resin composition reinforced with antibacterial and deodorizing function according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

Prior to the description of the present invention, the following specific structures or functional descriptions are merely illustrated for the purpose of describing embodiments according to the inventive concept, and the embodiments according to the inventive concept may be implemented in various forms. It should not be construed as limited to the embodiments described herein.

In addition, embodiments in accordance with the concepts of the present invention may be modified in various ways and may have various forms, specific embodiments will be illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments in accordance with the concept of the present invention to a particular disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

As shown in Figure 1, the aluminum tube coated with a resin composition reinforced with antibacterial and deodorizing function according to an embodiment of the present invention is the tube body 100 made of aluminum, the inner diameter of the tube body 100 The coating is formed of the inner coating layer 110, the outer coating layer 120 is formed on the outer diameter of the tube body 100.

In particular, the inner coating layer 110 is in direct contact with the tap water.

Tube body 100 is molded from aluminum, not only lightweight but also excellent in durability, convenient construction and long life can be achieved.

The inner coating layer 110 and the outer coating layer 120 are formed by coating a resin composition for coating an aluminum tube to express antibacterial properties. Preferably, the resin composition for coating an aluminum tube is dried at room temperature after the coating is performed in a dipping method.

Hereinafter, the manufacturing method of the resin composition for aluminum tube coating is demonstrated.

(1) Acrylic resin manufacturing step

Acrylic resins are prepared by solution polymerization of one or two or more monomers selected from butyl acrylate, methyl methacrylate, ethyl acrylate and methacrylic acid.

That is, one or two or more monomers are put in a polymerization reactor maintained at 80-85 ° C. and stirred and polymerized for 40 minutes to 2 hours to produce an acrylic resin.

In this case, isopropyl alcohol (IPA) is used as the dispersion solvent, and the average molecular weight of the acrylic resin after polymerization is 20,000-30,000.

The acrylic resin is a base resin added to maintain a high adhesion or adhesive force so as not to fall off from the inner wall or the outer wall of the aluminum pipe, which is a water pipe.

A polymerization initiator may be added, and a polymerization initiator is added to make free radicals and combine with many other units to induce polymerization, and organic peroxide, hydrogen peroxide and ammonium persulfate may be used, and preferably lauryl peroxide , tert-butyl hydroperoxide, diisopropyl peroxide carbonate and potassium percellate may be used, and in some cases, a redox-based initiator may be used in combination with a polymerization initiator and a reducing agent.

(2) basic polymer manufacturing step

The base polymer was prepared by reacting 0.05-1.5 parts by weight of the room temperature curing crosslinking agent with respect to 100 parts by weight of the acrylic resin obtained in step (1).

As a room-temperature-curable crosslinking agent, metharol acrylamide and glycyryl methacrylate are mixed and used in a weight ratio of 1: 1.

(3) emulsion solution preparation step

An emulsion solution is prepared by mixing 20-40 parts by weight of a transition metal compound, 20-40 parts by weight of silicate mineral, 20-50 parts by weight of water, and 5-20 parts by weight of an emulsifier to 100 parts by weight of the base polymer obtained in step (2).

Sodium lauryl sulfate (SLS) is used as an emulsifier.

The transition metal compound is one of Zn complex, Fe complex, Mg complex which is an alkaline earth metal, and Ca complex.

Transition metal compounds are complex compounds formed by the reaction of alkaline earth metals and rare earths and are added for antibacterial activity and water purification.

The silicate mineral may comprise a crystalline aluminum silicate mineral zeolite (particularly hydrothermally treated particle diameter 50 nm-5 μm).

Silicate minerals are added for far-infrared radiation and filler functions.

In this way, the transition metal compound and silicate mineral having antimicrobial properties are added to enhance antimicrobial, deodorizing and far infrared radiation properties. If each is added in an amount less than 20 parts by weight, these properties are extremely insignificant and ineffective. When it exceeds the weight part, since the viscosity of resin is raised and moldability is inhibited, it should be limited to the said range.

(4) step of preparing acrylic mixed monomer solution

An acrylic mixed monomer solution is prepared by mixing 0.05-0.15 parts by weight of a polycarbodiimide, 0.03-0.1 parts by weight of a polymerization initiator, and 60-90 parts by weight of water, based on 100 parts by weight of the acrylic mixed monomer.

The acryl-based mixed monomer is a mixed monomer in which butyl acrylate, ethyl acrylate, ethyl methacrylate, methacrylate, methyl methacrylate and ethylhexyl acrylate are mixed in an equivalent ratio of 1: 1.

The polymerization initiator is the same as the polymerization initiator used for producing the acrylic resin in step (1).

The acrylic mixed monomer solution is added to maximize the adhesion or adhesiveness by increasing the cohesion between molecules to facilitate chemical and physical crosslinking because the molecular weight is relatively small when the emulsion is polymerized.

In this case, the acrylic mixed monomer includes a polycarbodiimide which is a carbodiimide crosslinking agent in order to increase crosslinkability between molecular chains, and if it is out of the addition range, the molecule is limited to the above range because it is difficult to maximize cohesion. shall.

(5) Resin composition polymerization step for aluminum tube coating

After injecting the emulsion solution prepared in step (3) to the polymerization reactor, the acrylic mixed monomer solution prepared in step (4) is added to the polymerization to prepare a resin composition for aluminum tube coating.

Specifically, 150-250 parts by weight of the acrylic mixed monomer solution is added to 100 parts by weight of the emulsion solution to polymerize. First, the emulsion solution is added to the polymerization reactor, and the acrylic mixed monomer solution is added dropwise to the polymerization reactor at a predetermined ratio for polymerization.

In this case, the polymerization reactor includes a 500 ml four-necked flask reactor made of tempered glass having a Mohs hardness of 5-6, and the reactor is connected to a stirrer, a reflux condenser, a nitrogen injector, and an acrylic monomer solution inlet, and has a constant polymerization temperature. In order to maintain the reactor is a double jacketed reactor is connected to a purified water bath. That is, the reactor is designed to be submerged in a purified constant temperature water bath.

When the polymerization is completed through such a manufacturing step, an aqueous acrylic polymerization resin according to the present invention, that is, a resin composition for aluminum tube coating can be made.

By such a polymerization reaction, the base polymer becomes a core and a mixed monomer forms a shell, thereby obtaining a resin composition for coating an aluminum tube with enhanced antibacterial and deodorizing function in which particles are evenly and stably dispersed.

The resin composition for coating an aluminum tube prepared as described above is coated on an aluminum tube.

That is, the resin composition for aluminum tube coating prepared as described above is coated with a dipping method to have a thickness of 50-100 μm on the inner diameter and the outer diameter of the aluminum tube, followed by drying at room temperature to coat the inner and outer peripheral surfaces of the inner and outer peripheral surfaces of the tube body 100, respectively. 110 and the outer coating layer 120 is formed.

As a result, a coating layer containing a ceramic material, which is harmless to the human body, is formed on the inner and outer diameters of the aluminum tube, thereby activating water molecules by radiating far-infrared rays, inhibiting the activity of mold and bacteria, and preventing the growth of microorganisms, thus preventing the development of odors. Softening reactions by metal compounds can also convert hard water into soft water, which leads to the use of sanitary and suitable tap water.

In particular, due to the formation of a coating film having a high adhesion with the aluminum tube, there is no dropping of the coating material, and the surface hardness of the coating film is high, so that only a very small amount of the eluting reaction from the coating layer has an advantage of almost semi-permanent service life.

Hereinafter, embodiments will be described.

[Examples 1-3]

Butyl acrylate (BA), ethyl acrylate (EA), methyl methacrylate (MMA) and methacrylic acid (MAA) as monomers were mixed in an equivalent ratio of 1: 1, respectively, to prepare monomers, and to produce potassium percell as a polymerization initiator. Pate (KPS: Potassium Persulfate) was added to prepare an acrylic resin by stirring and dropping for 40 minutes to 2 hours at a temperature of 80 to 85 ° C.

As a room temperature-curable crosslinking agent, a mixed solution of 0.05 part by weight of metharol acrylamide and 0.05 part by weight of glycyryl methacrylate was prepared as a crosslinking agent for 100 parts by weight of the prepared acrylic resin, and reacted at a temperature of 80 ° C. for about 60 minutes to prepare a base polymer. .

An emulsion solution containing water was prepared by mixing a water-based transition metal compound and a silicate mineral having an antibacterial activity with a basic polymer and sodium lauryl sulfate (SLS) as an emulsifier.

A transition metal compound was used as a Zn complex compound and zeolite was used as a silicate mineral.

An acrylic mixed monomer solution was prepared separately from the emulsion solution.

A mixture of butyl acrylate (BA), ethyl acrylate (EA), ethyl methacrylate (EMA), methacrylate (MA), methyl methacrylate (MMA), and ethylhexyl acrylate (EHA) Polycarbodiimide, a polymerization initiator, and water were mixed with the monomer to prepare an acrylic mixed monomer solution.

Redox-based initiator was used as the polymerization initiator.

Thereafter, the emulsion solution was injected into the polymerization reactor, and after the temperature was raised, an acrylic monomer solution was constantly added into the polymerization reactor with a micropump, followed by dropwise reaction to polymerize and prepare a secondary polymer.

The polymerization apparatus includes a 500 ml four-necked flask reactor made of tempered glass having a Mohs hardness of about 5 to 6, and a stirrer, a reflux capacitor, a nitrogen injector, and a monomer solution inlet are respectively connected, and the reactor is purified at a constant temperature. The tank was immersed in a connected double jacketed reactor.

The weights of the emulsion solution and the acrylic mixed monomer solution used in this reaction are shown in Table 1.

Unit: g

ingredient		Example 1	Example 2	Example 3
Emulsion solution	Basic polymer	25.0	26	28
	Emulsifier	2.5	2.6	2.8
	water	11.5	10.4	8.2
	Zeolite	7.5	7.5	7.5
	Transition metal compound	7.5	7.5	7.5
Acrylic Mixed Monomer Solution	Butyl acrylate (BA)	0.5	0.7	1.0
	Ethyl acrylate (EA)	1.0	0.9	1.0
	Ethyl methacrylate (EMA)	2.0	2.5	3.0
	Methacrylate (MA)	3.0	2.8	2.8
	Methyl methacrylate (MMA)	8.0	7.5	7.8
	Ethylhexyl acrylate (EHA)	40.0	42.0	42.0
	Polycarbodiimide (PCI)	0.05	0.05	0.05
	Redox-based initiator	0.29	0.29	0.29
	water	45.16	43.26	42.06

In addition, the resin composition for aluminum tube coating prepared according to the above reaction was found to have a milky white viscosity and a pH of 7 to 8.5. Peel strength, water resistance, turbidity, antibacterial activity, and deodorization of Examples 1 to 3 Sex was measured.

<Peel strength measurement>

After coating the resin coating composition of Examples 1 to 3 on the kraft paper to a certain thickness by the method shown in ASTM 3330, dried at a certain temperature and for a certain time, cut to a size of 25mm × 100mm and affixed to an aluminum sheet 30cm with an automatic pressing roller device. Peeling strength was evaluated by measuring the peeling demand load while squeezing once at reciprocating speed / min and peeling at a rate of 300 mm / min after 180 ° peel test after 30 minutes.

<Water resistance measurement>

The coating film was formed with the resin coating composition of Examples 1 to 3 on an aluminum sheet having a size of 100 mm × 100 mm × 2 mm at a thickness of 50 μm, and the time when the coating film was initially separated was immersed in water for 10 days at room temperature.

<Cloudiness phenomenon>

A coating film was formed from the resin coating composition of Examples 1 to 3 on a 100 mm × 100 mm × 2 mm sized aluminum sheet, and then immersed in water for 10 days at room temperature to determine whether turbidity occurred due to hydrolysis. .

Peel strength, water resistance, and turbidity occurrence for Examples 1 to 3 are summarized in Table 2.

division	Example 1	Example 2	Example 3
Peel Strength (kgf / 25mm)	3.50	3.50	3.52
Water resistance	Not separated	Not separated	Not separated
Cloudiness	Not Occurred	Not Occurred	Not Occurred

<Antibacterial> The resin compositions of Examples 1 to 3 were coated with a thickness of 50 μm on an aluminum sheet having a size of 100 mm × 100 mm × 2 mm, and then added to E. coli cells (Escherichia Coli ATCC 8739) to check the antimicrobial properties. Samples (Blank, control) incubated at a concentration of 10 ⁵ cells / ㎖ was dropped on the coating surface coated with the resin composition of Examples 1 to 3 and the number of cultured bacteria was measured at the time point of 24 hours, the measurement result Is shown in Table 3.

division	Viable count		% Reduction
	Initial bacterial count	After 24 hours
Example 1	2.0 × 10 5	7.42 × 10 4	80.2
Example 2	2.0 × 10 5	5.24 × 10 3	92.7
Example 3	2.0 × 10 5	<10	99.9

As shown in Table 3, in Examples 1 to 3 according to the present invention was significantly increased E. coli reduction rate was confirmed that the antimicrobial reduction rate up to 99.9%.

After impregnating and coating the aluminum sheet of 100 × 200 × 5mm with a resin coating composition of Examples 1 to 50 μm in thickness, the sample sheet was placed in a rectangular stainless steel container to check deodorization, and the tap water was not chlorinated. Deodorization was measured 24 hours after pouring 300 kPa.

As a result, in Examples 1 to 3, complete deodorization was performed.

<Comparative Example 1>

For comparison, an acrylic resin used for commercially available water pipes was purchased, and the acrylic resin was coated on an aluminum sheet with a thickness of 50 μm.

<Comparative Examples 2 to 5>

To 100 g of the acrylic resin of Comparative Example 1, 8g (Comparative Example 2), 10g (Comparative Example 3), 15g (Comparative Example 4), 5g (Comparative Example 5) were respectively mixed with a transition metal compound and zeolite. The coating was 50 μm thick.

For Comparative Examples 1 to 5, the peel strength was measured in the same form as Examples 1 to 3, and the peel strengths of Comparative Examples 1 to 5 were 1.58 kgf / 25mm (Comparative Example 1) and 1.43 kgf / 25mm, respectively (Comparative Example). 2), 1.37 kgf / 25mm (Comparative Example 3), 1.31 kgf / 25mm (Comparative Example 4), 1.49 kgf / 25mm (Comparative Example 3) appeared, having a very weak peel strength compared to Examples 1 to 3 Confirmed. As described above, Comparative Examples 1 to 5 were basically manufactured as water pipes, and thus showed very low adhesion to aluminum tubes.

For Comparative Examples 2 to 5, the same antimicrobial test as in Examples 1 to 3 was performed.

division	Viable count		% Reduction
	Initial bacterial count	After 24 hours
Comparative Example 2	2.0 × 10 5	1.896 × 10 5	6.4
Comparative Example 3	2.0 × 10 5	1.824 × 10 5	9.21
Comparative Example 4	2.0 × 10 5	1.526 × 10 5	28.5
Comparative Example 5	2.0 × 10 5	1.032 × 10 5	50.2

Compared to Comparative Example 5 (5g), Comparative Example 3 (10g), Comparative Example 4 (14g), the antimicrobial antimicrobial activity predicted excellent antimicrobial results due to the amount of far-infrared emitter ceramics having an antibacterial function, but the higher the content of far-infrared emitter ceramics Not only was the effect deteriorated, but the adhesion to the surface of the aluminum tube was reduced, and the fatal result of cracking was confirmed. From the above results, the resin composition for coating an aluminum tube with enhanced antibacterial and deodorizing function according to the present invention. By using this, it is possible to manufacture an aluminum water pipe with excellent antibacterial and deodorizing function by coating it on the water aluminum pipe of the present invention, it is possible to supply safe drinking water treated with antibacterial, deodorized, purified through the aluminum water pipe of the present invention, The effect of preventing diseases such as food poisoning can be obtained.

The present invention can be used for an aluminum pipe for water.

Claims (2)

1. One or two or more selected from butyl acrylate, methyl methacrylate, ethyl acrylate and methacrylic acid are placed in a polymerization reactor maintained at 80-85 ° C., and stirred for 40 minutes to 2 hours so that the average molecular weight is 20,000-30,000. Acrylic resin manufacturing step of polymerizing to produce an acrylic resin;

   Preparing a base polymer by reacting 0.05-1.5 parts by weight of a room temperature-curable crosslinking agent in which a metharol acrylamide and glycyryl methacrylate are mixed in a weight ratio of 1: 1 with respect to 100 parts by weight of the acrylic resin;

   Emulsion to prepare an emulsion solution by mixing 20-40 parts by weight of a transition metal compound, 20-40 parts by weight of silicate mineral, 20-50 parts by weight of water, and 5-20 parts by weight of sodium lauryl sulfate as an emulsifier. Solution preparation step;

   Polycarbodiimide, a carbodiimide crosslinking agent, based on 100 parts by weight of an acrylic mixed monomer containing butyl acrylate, ethyl acrylate, ethyl methacrylate, methacrylate, methyl methacrylate, and ethylhexyl acrylate, 0.05-0.15 An acrylic mixed monomer solution preparing step of preparing an acrylic mixed monomer solution by mixing parts by weight, 0.03-0.1 parts by weight of a polymerization initiator, and 60-90 parts by weight of water;

   Injecting the emulsion solution into the polymerization reactor, while heating the resin composition for the aluminum tube coating to prepare a resin composition for coating the aluminum tube by adding 150-250 parts by weight of the acrylic mixed monomer solution to 100 parts by weight of the emulsion solution. Polymerization step;

   Resin composition manufacturing method for coating aluminum tube reinforced with antibacterial and deodorizing function, characterized in that comprises a.
2. An aluminum tube coated with a resin composition having an antimicrobial and deodorizing function coated on the inner circumferential surface of the aluminum tube tube body by coating the resin composition prepared by the method for preparing an aluminum tube coating resin composition according to claim 1.

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