KR101677526B1 - One-solution type hydrophilic corrosion resistant coating agent for heat exchanger of air conditioner and preparing method thereof - Google Patents

Abstract

The present invention relates to (1) a hydrophilic polymer resin; (2) Zirconium hydrofluoric acid; (3) chromium compounds; (4) sodium metavanadate; (5) amide-based crosslinking agents; (6) an epoxy silane compound catalyst; And (7) an aminosilane compound catalyst. The one-component corrosion-resistant and hydrophilic coating agent for an air conditioner heat exchanger of the present invention has a corrosion-resistant And hydrophilicity can be imparted and high coating film stability can be exhibited. In addition to preventing the coating film from being adsorbed and adsorbed, the corrosion-resistant and hydrophilic coating process of the air conditioner heat exchanger is shortened, And thus can be usefully used as a corrosion-resistant and hydrophilic coating agent for an air conditioner heat exchanger.

Description

TECHNICAL FIELD [0001] The present invention relates to a one-component corrosion-resistant and hydrophilic coating agent for an air-conditioner heat exchanger, and a method for manufacturing the same. BACKGROUND ART < RTI ID = 0.0 >

The present invention relates to a corrosion-resistant and hydrophilic coating agent for an air conditioner heat exchanger, and more particularly, to a one-part coating agent which can be coated on the surface of an automotive air conditioner heat exchanger to exhibit corrosion resistance and hydrophilicity, and a method for manufacturing the same.

The automotive air conditioner heat exchanger is required to have reliable long term corrosion resistance and heat exchange characteristics because it is used and exposed in harsh environments such as large temperature difference in summer and winter and snow and rain.

Prior art relating to a method for imparting corrosion resistance and hydrophilicity to an air conditioner heat exchanger is disclosed in Japanese Patent Laid-Open Nos. 2002-088348 and 2004-0056793.

Japanese Patent Application Laid-Open No. 2002-088348 includes a water-soluble polymer compound (A) having at least one kind selected from a carboxyl group, an amide group, a hydroxyl group, a sulfonic group and a phosphonic group bonded to a main chain and at least one aromatic nucleus structure Discloses a technique of coating an organic hydrophilic treatment agent containing a phenol compound (B) in which a total of five or more hydroxyl groups are directly bonded to a cyclic structure to impart hydrophilicity to the surface of an aluminum fin of an air conditioner heat exchanger.

Also, Korean Patent Laid-Open Publication No. 2004-0056793 discloses a method of coating a hydrophilic agent composition containing a solid matter emulsion-polymerized with a basic acrylic compound, an acrylic compound, an acidic acrylic compound, a radical copolymerizable basic acrylic compound and a reactive emulsifier, A technique for imparting hydrophilicity is disclosed.

However, all of these techniques must be subjected to a two-step process in which a corrosion-resistant coating must be applied in order to impart corrosion resistance to the surface of aluminum before coating is performed to impart hydrophilicity.

That is, in the corrosion and hydrophilic coating method applied to a conventional automotive air conditioner heat exchanger, as shown in FIG. 1, a corrosion-resistant coating is formed by forming a chemical reaction film and imparting corrosion resistance as a first step, FIG. 2 is a schematic cross-sectional view of an air conditioner heat exchanger fin including a corrosion-resistant and hydrophilic coating. As described above, when the coating process for imparting corrosion resistance and hydrophilicity to the air conditioner heat exchanger is divided into two stages, the treatment process and time are prolonged, which is weak in productivity and economical efficiency.

Therefore, there is a need to develop a one-component coating agent which is excellent in productivity and economy, and has long-term adhesion stability by simultaneously imparting corrosion resistance and hydrophilicity by the coating treatment in the first step.

Japanese Patent Application Laid-Open No. 2002-088348 Korean Patent Publication No. 2004-0056793

It is an object of the present invention to provide a one-component corrosion-resistant and heat-resistant anti-corrosion coating for an air conditioner heat exchanger which can impart corrosion resistance and hydrophilicity to the fin of the air conditioner heat exchanger by coating treatment in one step, , And a hydrophilic coating agent.

It is still another object of the present invention to provide a method for manufacturing a one-part corrosion-resistant and hydrophilic coating agent for the air conditioner heat exchanger.

In accordance with the above object,

(1) a hydrophilic polymer resin;

(2) Zirconium hydrofluoric acid;

(3) chromium compounds;

(4) sodium metavanadate;

(5) amide-based crosslinking agents;

(6) an epoxy silane compound catalyst; And

(7) Aminosilane compound catalyst

A one-pack type corrosion-resistant and hydrophilic coating agent for an air conditioner heat exchanger.

Further, according to another object,

(A) adding a hydrophilic resin to ion-exchanged water and stirring to prepare a mixed solution;

(B) adding an amide crosslinking agent to the mixed solution of step (A);

(C) placing zirconium hydrofluoric acid, chromium nitrate, and sodium metavanadate in this order in the mixed solution of step (B); And

(D) introducing an epoxy silane compound catalyst into the mixed solution of step (C), and then introducing an aminosilane compound catalyst

Hydrophilic coating agent for an air conditioner heat exchanger.

The one-part corrosion-resistant and hydrophilic coating agent for an air conditioner heat exchanger of the present invention can impart corrosion resistance and hydrophilicity to the fin of the air conditioner heat exchanger by coating treatment in one step, exhibit high coating film stability, And can shorten the corrosion resistance and hydrophilic coating process of the air conditioner heat exchanger to shorten the manufacturing space and the manufacturing time for the corrosion-resistant and hydrophilic coating of the air conditioner heat exchanger. Therefore, it is useful as a corrosion- .

1 is a process diagram schematically illustrating a corrosion-resistant and hydrophilic coating process of an air conditioner heat exchanger using a corrosion-resistant, hydrophilic coating agent for a conventional air conditioner heat exchanger.
2 is a schematic cross-sectional view of a coated air conditioner heat exchanger fin when corrosion-resistant and hydrophilic coating is applied to an air conditioner heat exchanger using a corrosion-resistant and hydrophilic coating agent for a conventional air conditioner heat exchanger.
3 is a process diagram schematically illustrating an example of a corrosion-resistant and hydrophilic coating process of an air conditioner heat exchanger using a corrosion-resistant and hydrophilic coating agent for an air conditioner heat exchanger of the present invention.
4 is a diagram schematically showing a state before coating and curing a corrosion-resistant and hydrophilic coating agent for an air conditioner heat exchanger according to an example of the present invention on a fin of an air conditioner heat exchanger.
FIG. 5 is a schematic view showing an example of a cross section of a coated air conditioner heat exchanger fin when an anti-corrosion and hydrophilic coating is applied to an air conditioner heat exchanger using an anti-corrosive and hydrophilic coating agent for an air conditioner heat exchanger of the present invention.
6 is a view schematically showing a corrosion resistant layer and a hydrophilic layer formed after applying a corrosion-resistant and hydrophilic coating agent for an air conditioner heat exchanger according to an example of the present invention to a fin of an air conditioner heat exchanger and curing the same.

The one-component corrosion-resistant and hydrophilic coating agent for an air conditioner heat exchanger of the present invention comprises (1) a hydrophilic polymer resin; (2) Zirconium hydrofluoric acid; (3) chromium compounds; (4) sodium metavanadate; (5) amide-based crosslinking agents; (6) an epoxy silane compound catalyst; And (7) an aminosilane compound catalyst.

(1) Hydrophilic polymer resin

The hydrophilic polymer resin is included in order to impart hydrophilicity to the fin of the air conditioner heat exchanger. The hydrophilic polymer resin forms a hydrophilic layer on the outermost surface of the fin of the air conditioner heat exchanger so that the fin of the air conditioner heat exchanger is hydrophilic. Thereby solving the problem of scattering of water droplets.

The hydrophilic polymer resin may be at least one selected from the group consisting of acrylic acid, methacrylic acid, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, dimethylaminoethyl (meth) acrylate, isobutyl (Meth) acrylate monomers, hydroxyethyl (meth) acrylates, vinyl esters, vinyl monomers, vinylidene chloride, vinyltoluene (meth) acrylate, But are not limited to, crotonic acid, itaconic acid, fumaric acid, maleic acid, monomethyl itaconate, monomethyl fumarate, monobutyl fumarate, maleic anhydride, 2-acrylamido- Hydroxypropane sulfonic acid, sodium 1-allyloxy-2-hydroxypropanesulfonate, alkylallylsulfosuccinic acid, sulfoethyl (meth) acrylate, phosphoryl (Meth) acrylate, phosphoalkyl crotonate, phosphoalkyl maleate, phosphoalkyl fumarate, phosphoalkyl (meth) acrylate, phosphodialkyl crotonate, allyl phosphate, vinylacetoacetate, acetoacetate (Meth) acrylate, acetoacetoxypropyl (meth) acrylate, allyl acetoacetate, acetoacetoxybutyl (meth) acrylate, 2,3-di (Meth) acrylate, ethyl (meth) acrylate, and acetoacetoxyethyl (meth) acrylamide, and preferably acrylic acid, methacrylic acid, methyl ) Acrylate, butyl (meth) acrylate, 1-allyloxy-2-hydroxypropanesulfonic acid, sodium 1-allyloxy- Sulfonate, hydroxyethyl methacrylate, 2-hydroxyethyl acrylate.

In the present invention, (meth) acrylic, (meth) acrylate refers to acrylic and / or methacrylic, acrylate and / or methacrylate.

In the polymerization of the monomer, an initiator may be used, and the initiator may be a water-soluble ionic initiator.

Examples of the water-soluble ionic initiator include potassium persulfate, sodium persulfate, hydrogen peroxide or ammonium persulfate, and the water-soluble ionic initiator may preferably be potassium persulfate.

The hydrophilic resin is prepared by dissolving the water-soluble ionic initiator in a solvent, adding the monomer at a temperature of 60 to 90 ° C, preferably 75 to 85 ° C, for 1 to 5 hours, and reacting for 30 minutes to 2 hours Can be polymerized. If necessary, after the reaction, the water-soluble ionic initiator may be further added to terminate the polymerization reaction. In this case, the water-soluble ionic initiator may be added after dissolving in a separate solvent. As the solvent, for example, ionized water, distilled water and the like can be used.

The process of adding and dissolving the water-soluble ionic initiator in the solvent is not particularly limited, but may be carried out at a temperature of, for example, 50 to 80 ° C and a stirring condition of 10 to 40 rpm. The water-soluble ionic initiator may be used in an amount of 1 to 30 parts by weight based on 100 parts by weight of the solvent.

The water-soluble ionic initiator may be used in an amount of 0.001 to 30 parts by weight, preferably 1 to 25 parts by weight based on 100 parts by weight of the total amount of the monomers, and the amount of the water-soluble ionic initiator added after the reaction is also the same.

The hydrophilic polymer resin may be 5 to 60 wt%, preferably 10 to 30 wt%, based on the total weight of the one-part corrosion-resisting and hydrophilic coating agent for the air conditioner heat exchanger.

(2) zirconium hydrofluoric acid, (3) chromium compounds, and (4) sodium metavanadate

The zirconium hydrofluoric acid, the chromium compound, and the sodium metavanadate form a corrosion resistant layer which is an oxide film having excellent corrosion resistance on the surface of the fin of the air conditioner heat exchanger. The corrosion resistant layer prevents corrosion of the heat exchanger fins and removes the fungus odor and the metal corrosion odor. Here, the fin of the air conditioner heat exchanger may be an aluminum pin, and the oxide film may be an aluminum oxide film.

The zirconium hydrofluoric acid may be formed between the fin of the heat exchanger and the hydrophilic layer by the consumption of fluorine, and the zirconium hydrofluoric acid may be present in an amount of 1 to 20 By weight, and preferably 2 to 10% by weight.

If the content of zirconium hydrofluoric acid is less than 1% by weight, corrosion resistance may be deteriorated. If it exceeds 20% by weight, hydrophilicity may be deteriorated.

The chromium compound enables the chromium contained in the chromium compound to form a corrosion resistant layer, which is a hard thin film layer of oxide, on the surface of the heat exchanger fin.

Wherein the chromium compound is at least one selected from the group consisting of chromium nitrate, chromium phosphate, chromium sulfate (15), chromium sulfate 15 hydrate, chromium sulfate octahydrate, chromium orthophosphate, chromium acetate, chromium acetate hydrate, chromium propionate, chromium oxalate hydrate, And mixtures thereof, and may be at least one selected from the group consisting of chromium nitrate.

The chromium compound may be used in an amount of 0.5 to 10 wt%, preferably 1 to 5 wt%, based on the total weight of the one-component corrosion-resistant and hydrophilic coating agent for the air conditioner heat exchanger.

If the content of the chromium compound is less than 0.5% by weight, it is difficult to provide adequate corrosion resistance on the surface of the heat exchanger fins. If it exceeds 10% by weight, it is difficult to expect an effect of improving the corrosion resistance.

The sodium metavanadate may be 2 to 24% by weight, preferably 0.5 to 2.5% by weight based on the total weight of the one-part corrosion-resistant and hydrophilic coating agent for the air conditioner heat exchanger.

If the sodium metavanadate content is less than 2% by weight, hydrophilicity of the surfaces of the heat exchanger fins may be deteriorated. When the content of the sodium metavanadate is more than 24% by weight, corrosion resistance may be deteriorated.

(5) Amide-based crosslinking agent

The amide-based crosslinking agent functions to cross-link the corrosion resistant layer and the hydrophilic layer formed on the fin of the heat exchanger to solidify the entire corrosion-resistant layer and the hydrophilic layer.

The amide crosslinking agent may be selected from the group consisting of formamide, sodium amide, nicotinamide, dimethylformamide, acetamide, potassium amide, oxamide, lithium diethylamide, dimethylformamide, benzamide, iodoacetamide, acetamide, , Phenylacetamide, cyanoacetamide, dicyanoacetamide, dimethylacetamide, diethylchloroacetamide, dimethylformamide, glycineamide, isopropylacrylamide, methacrylamide, methylenebisacrylamide, nicotinamide, And at least one member selected from the group consisting of formamide, acetamide, and acrylamide may be used, and at least one member selected from the group consisting of formamide, One can.

The amide crosslinking agent may be 2 to 24% by weight, preferably 4 to 12% by weight based on the total weight of the one-component corrosion-resistant and hydrophilic coating agent for the air conditioner heat exchanger.

(6) an epoxy silane compound catalyst and (7) an aminosilane compound catalyst

The epoxy silane compound catalyst and the aminosilane compound catalyst are contained in the composition of the one-component corrosion-resistant and hydrophilic coating agent for the air-conditioner heat exchanger of the present invention to move the hydrophilic resin having the hydrophilic functional group to the outermost surface of the coating film The hydrophilic resin forms a hydrophilic layer on the outermost surface of the heat exchanger fin.

The epoxy silane compound catalyst may be at least one selected from the group consisting of 3-glycidoxypropyltrimethoxy silane, chlorotrimethylsilane, 4- (chloromethyl) pentyl trichlorosilane, dichlorodimethylsilane, dichloromethylsilane, dichloromethylphenylsilane, dimethyldichlorosilane, Vinyltrimethoxysilane, vinyltrimethoxysilane, vinyltrimethoxysilane, vinyltrimethoxysilane, vinyltrimethoxysilane, vinyltrimethoxysilane, vinyltrimethoxysilane, vinyltrimethoxysilane, vinyltrimethoxysilane, vinyltrimethoxysilane, , And methyltrimethoxysilane, and preferably at least one member selected from the group consisting of 3-glycidoxypropyltrimethoxy-silane, dichloromethylsilane, and ethoxytrimethylsilane .

The epoxy silane compound catalyst may be used in an amount of 0.01 to 2% by weight, preferably 0.15 to 0.75% by weight based on the total weight of the one-component corrosion-resistant and hydrophilic coating agent for the air conditioner heat exchanger.

The aminosilane compound catalyst according to (7), wherein the aminosilane compound catalyst is at least one selected from the group consisting of 3-amino-propyltrimethoxy silane, (2-aminoethyl) -3-aminopropyltrimethoxysilane, N- (beta-aminoethyl) (Diethylamino) silane, 3-aminopropyl-trimethoxysilane, tridecafluoro-1,1,2,2-tetrahydrooctyltriethoxysilane, gamma-isocyanatopropyltri Selected from the group consisting of methoxysilane, hexamethyldisilane, aminoethyl-aminopropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, fluorosilane, and 3-methacryloxypropyl-trimethoxysilane And preferably at least one member selected from the group consisting of 3-amino-propyltrimethoxy-silane, hexamethyldisilane, and bis (diethylamino) silane.

The one-part corrosion-resistant and hydrophilic coating agent for an air-conditioner heat exchanger of the present invention may further comprise (8) a directional substance as required. The aromatic material is not particularly limited as long as it is included in the corrosion-resistant, hydrophilic coating agent to impart the fragrance, but it may be preferably phytoncide. The above-mentioned phytoncide is included in a one-part corrosion-resistant and hydrophilic coating agent for an air conditioner heat exchanger to prevent coating of the coating agent itself, to prevent absorption due to adsorption of contaminants, and to ensure human safety. Can be used.

The aromatic compound (8) may be contained in an amount of 1 to 50% by weight, preferably 1 to 25% by weight based on the total weight of the one-component corrosion-resistant and hydrophilic coating agent for the air conditioner heat exchanger.

The one-component corrosion-resistant and hydrophilic coating agent for an air-conditioner heat exchanger of the present invention is,

(A) adding a hydrophilic resin to ion-exchanged water and stirring to prepare a mixed solution;

(B) adding an amide crosslinking agent to the mixed solution of step (A);

(C) placing zirconium hydrofluoric acid, chromium nitrate, and sodium metavanadate in this order in the mixed solution of step (B); And

(D) introducing an epoxy silane compound catalyst into the mixed solution of step (C), and then introducing an aminosilane compound catalyst

≪ / RTI >

FIG. 3 is a flow chart schematically illustrating an example of a corrosion-resistant and hydrophilic coating process of an air conditioner heat exchanger using an anti-corrosive and hydrophilic coating agent for an air conditioner heat exchanger of the present invention.

Referring to FIG. 3, an example of the corrosion-resistant and hydrophilic coating process of the air conditioner heat exchanger using the corrosion-resistant and hydrophilic coating agent for an air conditioner heat exchanger of the present invention includes the following four steps.

 Step 1 is a process for cleansing and activating the surface of the coating film of the fin of the heat exchanger. In the first stage, the oil or foreign matters of the heat exchanger pins are removed, and the excess residual flux of the coating film and the aluminum oxide coating are removed.

Step 2 is a process to stabilize the coating film through washing process so that the following corrosion and hydrophilic coating steps can be facilitated.

Step 3 is a corrosion-resistant and hydrophilic coating process, and is a process for applying a corrosion-resistant and hydrophilic coating agent for an air conditioner heat exchanger according to an exemplary embodiment of the present invention to a pin of a heat exchanger for anti-corrosion and hydrophilic coating. In step 3, as shown in Fig. 4, corrosion-resistant metal compounds such as chromium nitrate, zirconium hydrofluoric acid, and sodium metavanadate are mixed with a hydrophilic polymer resin, a silane compound catalyst, and an amide crosslinking agent.

The fourth step is to dry-cure the corrosion-resistant, hydrophilic coating for the air conditioner heat exchanger applied to the air conditioner heat exchanger. When the corrosion-resistant and hydrophilic coating agent for an air-conditioner heat exchanger is dried and cured, the resin having a hydrophilic functional group in the mixed solution by the silane compound catalyst in the corrosion-resistant and hydrophilic coating agent migrates to the outermost surface of the coating film, An aluminum oxide film having excellent corrosion resistance and adhesion is formed between the aluminum fin material layer and the hydrophilic resin layer and forms a strong corrosion resistant layer together with the silane compound catalyst and the metal compound. In addition, the corrosion resistant layer of the metal compound is cross-linked with the hydrophilic layer by an amide-based crosslinking agent to form a complete corrosion-resistant hydrophilic coating layer. FIG. 5 shows an example of a corrosion-resistant and hydrophilic coating layer of the heat-exchanger fins thus manufactured. FIG. 5 shows the corrosion-resistant and hydrophilic coating layer of the heat- .

Hereinafter, the present invention will be described in more detail with reference to the following Preparation Examples and Examples, but the present invention is not limited thereto.

Example

Manufacturing example  : Preparation of hydrophilic resin

To 60 g of ionized water, 5 g of potassium persulfate was added and dissolved with stirring at 70 DEG C and 20 rpm at 20 DEG C to prepare a solution of a water-soluble ionic initiator, followed by heating to 80 DEG C. At 80 ° C, a mixed solution obtained by mixing 10 g of 2-hydroxy-ethyl-acetate, 5 g of methacrylic acid and 55 g of sodium 1-allyloxy-2-hydroxypropane-sulfonate was added to the water-soluble ionic initiator for 3 hours And the reaction was maintained for 1 hour. A solution of 5 g of potassium persulfate dissolved in 5 g of ionized water was prepared, and the solution was added dropwise for 30 minutes while stirring at 50 rpm. After further stirring for 10 minutes, the stirring speed was lowered at 20 rpm and the reaction was maintained for 50 minutes The polymerization was terminated to prepare a hydrophilic resin.

Example  1 to 6

A corrosion-resistant and hydrophilic coating agent for an air-conditioner heat exchanger was prepared by the ingredients and compositions shown in Table 1, and the concrete method is as follows.

After adding the hydrophilic resin prepared in the above Production Example to ion-exchanged water at room temperature, an amide cross-linking agent was added to the production liquid under stirring. Then zirconium hydrofluoric acid, chromium nitrate, and sodium metavanadate were placed in order. Then, the epoxy silane compound catalyst was put in first and the aminosilane compound catalyst was added. Finally, phytoncide was added to complete the preparation of the treatment liquid.

One-part coating material raw material (% by weight) Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Ion-exchange water 77.3 51.6 45.9 40.2 14.5 16.3 Hydrophilic resin 10 15 20 25 30 35 Formamide 4 6 8 10 12 14 Zirconium hydrofluoric acid 2 4 6 8 10 12 Chromium nitrate One 2 3 4 5 6 Sodium Metabanade Dating 0.5 One 1.5 2 2.5 3 3-glycidoxypropyltrimethoxysilane 0.15 0.3 0.45 0.6 0.75 0.9 3-aminopropyltrimethoxysilane 0.05 0.1 0.15 0.2 0.25 0.3 Phytoncide 5 20 15 10 25 12.5

Experimental Example

Six aluminum specimens of size (7 x 15 cm, thickness 0.1 mm) were prepared and degreased by immersing them in the degreasing solution for one minute. Immediately, the degreased aluminum specimen was immersed in water for 3 minutes and washed with water. Immediately after being immersed in the corrosion-resistant and hydrophilic coating agent for air conditioner heat exchanger manufactured according to Examples 1 to 6 for 2 minutes and taken out on each of the washed aluminum specimens after being taken out and then taken out at 200 ° C for 10 minutes and cured, Coated aluminum coated specimens were prepared.

Hydrophilicity, corrosion resistance, antimicrobial property, antifungal property and gas adsorption property of each aluminum specimen were evaluated. The evaluation criteria at this time are shown in Table 2, and the results are shown in Table 3.

Performance evaluation items Early After watering Test Methods Hydrophilic <5 ° <20 ° Contact angle measurement Corrosion resistance &Lt; 10% (after 240 hours) Salt spray test ⁾ Antibacterial 1 rating 1 rating Bacterial resistance test [according to JIS Z 2801] Antifungal 1 rating 1 rating Fungal resistance test [according to ASTM G21-70] Gas adsorption characteristic <3 <10 GC measurement

&Lt; Contact angle measurement &

The contact angle after drying is measured by immersing for 240 hours in a water tank in which distilled water flows at a hydrophilic level of 2 L / min.

<Salt spray test>

The coated aluminum specimen is left in a 5 wt.% NaCl solution at 35 DEG C for 240 hours, and then the coating corrosion area is measured.

<Bacterial resistance test>

Place the coated aluminum specimen in the center of the sterilized culture dish and place the absorbent paper of the same size as the specimen surface. 1 ml of the bacterial solution is inoculated on an absorbent paper and cultured for 24 hours at 35 ° C and a relative humidity of 90% or more, and the increase or decrease of the viable cell count is measured.

&Lt; Fungal resistance test >

A PDA medium (potato dextrose agar) was prepared on the culture dish, and the coated aluminum specimen was placed on the medium. The mixed spore suspension of five fungi was sprayed evenly on the sample and the medium and incubated at 25 ° C and 90% Day. Inspection intervals are checked and recorded every week.

&Lt; GC measurement >

Using a gas adsorption analyzer, the amount of acetic acid gas adsorbed before and after passing through the coated aluminum specimen is measured.

Evaluation items of coating film properties Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Hydrophilic
(Initial / after flow) 4.2 / 9.4 3.3 / 7.8 2.6 / 6.2 0 / 3.3 1.7 / 4.1 2.1 / 5.3 Corrosion resistance (corrosion area%) 7 5 3 0 4 6 Antibacterial (grade) One One One One One One Antifungal (grade) One One One One One One Gas adsorption characteristic
(Initial / after flow, μg / cm ² ) 2.8 / 7.7 2.1 / 5.7 1.2 / 3.6 0.8 / 1.4 1.6 / 2.2 1.9 / 4.3

As a result of examining the optimum raw material ratio of the corrosion-resistant and hydrophilic coating agent for an air conditioner heat exchanger as described above, it was confirmed that Example 4 is the most excellent.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, It is to be understood that the invention may be practiced within the scope of the appended claims.

Claims (10)

(1) a hydrophilic polymer resin;
(2) Zirconium hydrofluoric acid;
(3) chromium compounds;
(4) sodium metavanadate;
(5) amide-based crosslinking agents;
(6) an epoxy silane compound catalyst; And
(7) Aminosilane compound catalyst
One-pack corrosion-resistant, hydrophilic coating for air-conditioner heat exchangers.
The method according to claim 1,
Wherein the hydrophilic polymer resin is selected from the group consisting of acrylic acid, methacrylic acid, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, dimethylaminoethyl (meth) acrylate, isobutyl (Meth) acrylate monomers such as t-butyl (meth) acrylate, cyclohexyl (meth) acrylate, ethylhexyl Maleic anhydride, maleic anhydride, maleic anhydride, maleic anhydride, maleic anhydride, maleic anhydride, maleic anhydride, maleic anhydride, maleic anhydride, maleic anhydride, (Meth) acrylate, phosphoalkyl (meth) acrylate, methoxypropane sulfonic acid, vinylsulfonic acid, styrenesulfonic acid, sodium 1-allyloxy-2-hydroxypropanesulfonate, alkylallylsulfosuccinic acid, (Meth) acrylate, phosphoalkyl crotonate, phosphoalkyl maleate, phosphoalkyl fumarate, phosphoalkyl (meth) acrylate, phosphodialkyl crotonate, allyl phosphate, vinylacetoacetate, acetoacetate (Meth) acrylate, acetoacetoxypropyl (meth) acrylate, allyl acetoacetate, acetoacetoxybutyl (meth) acrylate, 2,3-di Wherein one or more monomers selected from the group consisting of acetoacetamide, acetoacetamide, and acetoacetoxyethyl (meth) acrylamide are polymerized to form a one-component corrosion-resistant and hydrophilic coating agent for an air-conditioner heat exchanger.
The method according to claim 1,
Wherein the amide crosslinking agent (5) is at least one compound selected from the group consisting of formamide, sodium amide, nicotinamide, dimethylformamide, acetamide, acrylamide, potassium amide, oxamide, lithium diethylamide, dimethylformamide, benzamide, , Acetamide, arylamide, phenylacetamide, cyanoacetamide, dicyanoacetamide, dimethylacetamide, diethylchloroacetamide, dimethylformamide, glycine amide, isopropylacrylamide, methacrylamide, methylenebis Wherein at least one member selected from the group consisting of acrylamide, nicotinamide, oleamide, oxamide, sulfonylamide, and thioacetamide is used.
The method according to claim 1,
Wherein the epoxy silane compound catalyst (6) is at least one compound selected from the group consisting of 3-glycidoxypropyltrimethoxysilane, chlorotrimethylsilane, 4- (chloromethyl) pentyltrichlorosilane, dichlorodimethylsilane, dichloromethylsilane, dichloromethylphenylsilane, dimethyldichlorosilane , Ethoxytrimethylsilane, methyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, pentyltrichlorosilane, tetramethylsilane, vinyltriethoxysilane, triethoxyvinylsilane, vinyltrimethylsilane, tetra And at least one member selected from the group consisting of methyltrimethoxysilane, methyltrimethoxysilane, methyltrimethoxysilane, and methyltrimethoxysilane.
The method according to claim 1,
The aminosilane compound catalyst according to (7), wherein the aminosilane compound catalyst is at least one selected from the group consisting of 3-amino-propyltrimethoxy silane, (2-aminoethyl) -3-aminopropyltrimethoxysilane, N- (beta-aminoethyl) (Diethylamino) silane), 3-aminopropyl-trimethoxysilane, tridecafluoro-1,1,2,2-tetrahydrooctyltriethoxysilane, gamma-isocyanatopropyl At least one member selected from the group consisting of trimethoxysilane, aminoethyl-aminopropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, fluorosilane, and 3-methacryloxypropyl-trimethoxysilane, One - pack corrosion - resistant, hydrophilic coating for air - conditioner heat exchangers.
The method according to claim 1,
A one-part corrosion-resistant, hydrophilic coating agent for the air conditioner heat exchanger
(1) a hydrophilic polymer resin; (2) Zirconium hydrofluoric acid; (3) chromium compounds; (4) sodium metavanadate; (5) amide-based crosslinking agents; (6) an epoxy silane compound catalyst; 1 to 20 wt%, 0.5 to 10 wt%, 0.1 to 5 wt%, and 2 to 5 wt%, based on the total weight of the one-component corrosion-resistant and hydrophilic coating agent for the air conditioner heat exchanger, 24 wt.%, 0.01 to 2 wt.%, And 0.01 to 2 wt.%, Based on the total weight of the composition.
The method according to claim 1,
A one-component corrosion-resistant, hydrophilic coating agent for the air conditioner heat exchanger
(1) a hydrophilic polymer resin; (2) Zirconium hydrofluoric acid; (3) chromium compounds; (4) sodium metavanadate; (5) amide-based crosslinking agents; (6) an epoxy silane compound catalyst; 10 to 30% by weight, 2 to 10% by weight, 1 to 5% by weight, 0.5 to 2.5% by weight, and 4 to 5% by weight, based on the total weight of the one-pack type corrosion-resistant and hydrophilic coating agent for the air conditioner heat exchanger, 12 wt%, 0.15 to 0.75 wt%, and 0.05 to 0.25 wt%, based on the total weight of the composition.
The method according to claim 1,
Wherein the one-component corrosion-resistant and hydrophilic coating agent for the air-conditioner heat exchanger further comprises (8) a directional substance, and (8) the aromatic substance is contained in an amount of 1 to 50% by weight based on the total weight of the one- One-pack corrosion-resistant, hydrophilic coating for air-conditioner heat exchangers.
9. The method of claim 8,
Wherein the aromatic material is a phytoncide.
(A) adding a hydrophilic resin to ion-exchanged water and stirring to prepare a mixed solution;
(B) adding an amide crosslinking agent to the mixed solution of step (A);
(C) placing zirconium hydrofluoric acid, chromium nitrate, and sodium metavanadate in this order in the mixed solution of step (B); And
(D) introducing an epoxy silane compound catalyst into the mixed solution of step (C), and then introducing an aminosilane compound catalyst
Hydrophilic coating agent for an air-conditioner heat exchanger.

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