KR20020020837A - Hydrophilic treatment chemical for metal materials containing aluminum and process therefor - Google Patents

Abstract

PURPOSE: To obtain an organic hydrophilic treatment agent for an Al-containing metal having high hydrophilicity, and odor preventive and a deodorization effects, suitable for fins for heat exchange, and to provide a method for the hydrophilic treatment using the agent. CONSTITUTION: The surface of an Al-containing metal material is coated with the treatment agent comprising a water-soluble polymer compound (A) to which one or more kinds of carboxy group, amide group, hydroxy group, sulfo group and phosphonic group are bonded, a phenol compound (B) in which five or more total OH groups are directly bonded to a polycyclic structure having an aromatic nucleus structure and, if required, a glycidyl group-containing organic compound (C), and the treatment agent is heated and solidified to form a hydrophilic coating film.

Description

HYDROPHILIC TREATMENT CHEMICAL FOR METAL MATERIALS CONTAINING ALUMINUM AND PROCESS THEREFOR}

The present invention relates to an organic hydrophilic treatment agent used for hydrophilizing the surface of an aluminum-containing metal material including an aluminum or aluminum alloy material, and a treatment method thereof. More specifically, the present invention relates to an organic hydrophilic treatment agent for forming a film exhibiting excellent hydrophilicity, deodorization, and deodorization effect on an aluminum-containing metal material and a method for treating an aluminum-containing metal material using the same. It is about. In particular, the organic hydrophilic treatment agent and treatment method of the present invention are used in the fields of home appliances and automobiles, and are suitable for the production of aluminum fins for heat exchangers used as air conditioner parts.

Conventionally, as a composition used for forming a hydrophilic film on the surface of an aluminum fin for heat exchangers, an aqueous solution containing an inorganic compound such as alkali silicate or silica as a main component, an aqueous solution of an organic polymer compound or an aqueous solution in which a surfactant is added thereto, etc. This is known. After the aluminum-containing metal material is immersed in these compositions or subjected to roller coating treatment, a hydrophilic film is formed on the aluminum surface by heating and drying.

On the other hand, as part of energy saving, in order to achieve the compactness of heat exchanger, the technical field of hydrophilicity and hydrophilicity is improved to improve the heat exchange rate by narrowing the fin pitch to further improve heat exchange rate. have.

There is also a great interest in the odor generated from heat exchangers, which are air conditioner components. That is, in the case of the hydrophilic coating formed mainly from the inorganic compound, there is a problem in that inorganic odors such as dust smell and cement odor are strongly generated to give discomfort.

In the case of the hydrophilic film formed mainly from the organic polymer compound, the smell of the film itself is small, but if used for a long time, microorganisms such as mold or bacteria are generated on the film, causing an unpleasant smell such as a decaying smell. In particular, the occurrence of an unpleasant odor is further enhanced under a high temperature and high humidity atmosphere. As a means of suppressing this, the method of directly attaching a fungicide to a heat exchanger by adding a fungicide to a hydrophilic treatment agent or deodorizing spray etc. is mentioned. Antimicrobial agents can provide a decaying odor suppression effect by adding a small amount, but they are not necessarily toxic to the human body handling them.

As a substance which suppresses odor, there is also a method of adding activated carbon having excellent adsorption capacity of odorous substance to the hydrophilic coating. However, there is a problem such that the adsorbed odorous substance is released again in a high humidity atmosphere or the hydrophilic persistence deteriorates.

In the processing method using the roller coating method, in the precoating method in which a hydrophilic treatment agent is applied on the surface of an aluminum-containing metal material, followed by heat drying, forming and processing, between the mold and the film under harsh processing conditions such as pulling and hole formation. There is a case that an unpleasant odor is caused by the friction that occurs in the.

In addition, the film containing the organic polymer compound as a main component causes film deterioration due to thermal decomposition or thermal oxidative decomposition by frictional heat, thereby producing an unpleasant odor. Even when odor does not occur during molding, thermal decomposition products of the organic polymer film may be present on the surface or the inside of the film, which may be volatilized at the beginning of the air conditioner to cause off-flavor.

Problems related to odor generation as described above occur in the working environment at the time of manufacture of the heat exchanger and in the indoor environment at the time of operating the air conditioner, and thus many users feel uncomfortable. Various proposals have conventionally been made for such odor countermeasures.

For example, Japanese Patent Laid-Open No. 9-272818 discloses a "hydrophilic treatment composition for thermal bridges." However, since the smell is felt from the film obtained by this disclosure, the odor prevention property is not perfect.

Japanese Patent Laid-Open No. 8-232028 discloses "a hydrophilic water treatment agent and a hydrophilic treatment method for an aluminum-containing metal material". The treatment agent contains a fungicide as an essential ingredient in order to prevent off-flavor occurrence. The fungicide is synthesized by a chemical reaction, and the toxicity of the fungicide itself is not necessarily low.

Furthermore, as a technique relating to deodorization, the "deodorant filter" of Japanese Patent Laid-Open No. 62-90168 and the "processing method of a fiber having a deodorant function" of Japanese Patent Laid-Open No. Hei 2-251681 are disclosed. Although the deodorizing effect is shown, its use and field are completely different from the technical field and use of the present invention, and thus are not suitable for the use of the present invention. In Japanese Patent Laid-Open No. 5-45083, "Al fin material for magnetic deodorizing heat exchanger" does not show off odor during press working, but contains water-dispersed silica. Due to the water, silica is present on the surface of the coating to produce an unpleasant inorganic odor.

Therefore, in the present situation, the composition which can form the hydrophilic film which can simultaneously provide the outstanding hydrophilicity, deodorization property, and deodorization property on the surface of an aluminum containing metal material is not obtained.

The present invention is to solve the above problems with the prior art, an organic hydrophilic treatment agent for forming an organic hydrophilic coating that imparts excellent hydrophilicity, deodorization, deodorization on the surface of the aluminum-containing metal material and a treatment method using the same It is to provide.

Here, the term "deodorization" in the term relating to the odor is due to the surface of the hydrophilic treated aluminum material produced by applying the present invention, no unpleasant odor from the bulk, and the film decomposition product due to frictional heat during processing. It means an effect that does not cause an unpleasant odor. However, the deodorizing effect described above means that the smell is lower than the level that can be detected by human beings, and does not mean that it is absolutely non-generated.

In addition, the term "deodorant" refers to an organic hydrophilic coating formed on an aluminum-containing metal material in an atmosphere in which odorous substances such as acetaldehyde, ammonia, trimethylamine, and mercaptan are actively reacted with each other to reduce their abundance. It means to reduce.

The organic hydrophilic treatment agent for aluminum-containing metal materials of the present invention is a water-soluble high molecular compound (A) in which at least one selected from a carboxyl group, an amide group, a hydroxyl group, a sulfone group and a phosphone group is bonded to the main chain, and 1 It is characterized by containing a phenol compound (B) in which five or more hydroxyl groups directly couple | bonded with the polycyclic structure which has more than one aromatic nucleus structure.

In the organic hydrophilic treatment agent for aluminum-containing metal materials of the present invention, it is preferable to further contain a glycidyl group-containing organic compound (C).

In the organic hydrophilic treatment agent for aluminum-containing metal materials of the present invention, it is preferable that the phenolic compound (B) is selected from polyhydroxy compounds represented by the following structural formula (I).

[Wherein in formula (I), X represents an aromatic group substituted by two or more hydroxyl groups, and Y represents a hydroxyl group or the following formula (II)

Represents an aromatic group represented by.]

In the organic hydrophilic treatment agent for aluminum-containing metal materials of the present invention, the polyhydroxy compound of the general formula (I) is (+)-catechin, (-)-epicatechin, (+)-gallocatechin, (-)-epicatechin Preference is given to gallates, (-)-epigallocatechin gallate, and (-)-epigallocatechin.

In the organic hydrophilic treatment agent for aluminum-containing metal materials of the present invention, the solid content conversion-containing content A, B and C of the components (A), (B) and (C) is represented by the following relations (1) and (2) It is desirable to be satisfied.

A / C = 9/1-3/7 (1)

B / (A + C) = 1/1000 to 1/20 (2)

The surface hydrophilic treatment method of the aluminum containing metal material of this invention apply | coats the above-mentioned organic hydrophilic treatment agent for aluminum containing metal materials of this invention to at least one surface of an aluminum containing metal material, and heat-drys this to form an organic hydrophilic coating layer. It is characterized by.

Hereinafter, the configuration of the present invention will be described in detail.

The organic hydrophilic treatment agent for aluminum-containing metal materials of the present invention is a water-soluble high molecular compound (A), a multihydroxyphenol compound (B) having a specific chemical structure, and a glycidyl group-containing organic compound (C) as necessary. It contains.

The water-soluble high molecular compound (A) used in this invention is mix | blended in a processing agent in order to provide high hydrophilicity to an aluminum containing metal material, This compound (A) consists of a carboxyl group, an amide group, a hydroxyl group, a sulfone group, and a phosphone group It has at least 1 type of functional group selected from the group. A water-soluble high molecular compound (A) is a polymer obtained by superposing | polymerizing on specific conditions, such as heating, pressurization, and stirring, using the ethylenically unsaturated bond containing monomer and oligomer which have said hydrophilic group.

Examples of the monomer containing the carboxyl group and the amide group for the water-soluble high molecular compound (A) include acrylic acid, methacrylic acid, crotonic acid, itaconic acid, maleic acid, fumaric acid, acrylamide, and the like. Included. Examples of the salts include alkali metal salts such as sodium and potassium, and alkaline earth metal salts such as magnesium and calcium.

As the monomer containing a sulfonic acid group and a phosphonic acid group, vinylsulfonic acid, sulfoethyl acrylate, sulfoethyl methacrylate, N-methylsulfonic acid acrylamide, 2-acrylamide-2-methylpropanesulfonic acid, styrenesulfonic acid, vinylsulfonic acid or Phosphonoxyethyl methacrylate and the like can be used. Furthermore, these salts can also be used, for example, alkali metal salts, such as sodium and potassium, and alkaline-earth metal salts, such as magnesium and calcium, are mentioned.

Furthermore, as a monomer containing a hydroxyl group, vinyl alcohol, 2-hydroxyethyl (meth) acrylic acid, 2-hydroxypropyl (meth) acrylic acid, 3-hydroxypropyl (meth) acrylic acid, etc. are mentioned.

The phenol compound (B) then has a polycyclic structure having one or more aromatic nucleus structures, in which five or more hydroxyl groups are directly bonded. It is preferable that such a phenol compound (B) is chosen from the multihydroxy compound represented by said structural formula (I). X group bonded to the 2-position in formula (I) is an aromatic group substituted by two or more hydroxyl groups, such as those represented by formulas (III) and (IV) below

The Y group selected from and bonded to the 3-position represents a hydroxyl group or an aromatic group having three or more hydroxyl groups represented by formula (II), for example, preferably an aromatic group represented by formula (IV). . Examples of the phenol compound (B) used in the present invention include catechin, epicatechin, gallocatechin, epicatechin gallate, epigallocatechin, epigallocatechin gallate and the like.

The phenolic compound (B) is a source of leaves of the Camellia family, for example, a mixture of the above-mentioned catechins obtained by further extracting and extracting from tea, camellia, forsythia, gynecology, triticale, sarcophagus and the like. It may be.

These catechin compounds have a high deodorizing and deodorizing effect regardless of the mixing ratio.

And the processing agent of this invention may contain glycidyl group containing compound (C) as needed. As the glycidyl group-containing compound (C), one having a crosslinking reactivity with respect to the carboxyl group or the amide group contained in the water-soluble high molecular compound (A) is used. For example, as a compound containing two or more glycidyl groups, sorbitol polyglycidyl ether, polyglycerol polyglycidyl ether, pentaerythritol polyglycidyl ether, triglycidyl triisocyanate, glycerol polyglycidyl ether , Polymethylolpropane polyglycidyl ether, resorcin diglycidyl ether, neopentylglycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, (poly) ethylene glycol diglycidyl ether , (Poly) propylene glycol diglycidyl ether, (poly) tetramethylene glycol diglycidyl ether, and the like can be used. These glycidyl group-containing compounds (C) bind to the reactive groups of the water-soluble high molecular compound (A) to insolubilize them, and also react with the hydroxyl groups of the phenol component (B) to render them poorly soluble to You can make it insoluble.

It is preferable that solid content conversion weight ratio A / C of the water-soluble high molecular compound (A) and glycidyl-group containing organic compound (C) contained in the hydrophilic treatment agent of this invention are 9/1-3/7. When this weight ratio A / C exceeds 9/1, a hydrophilic film is formed after application | coating and baking, but hydrophilic persistence may slightly deteriorate in a wet environment. However, this is a level that is practically no problem. And when weight ratio A / C exceeds 3/7, hydrophilic persistence of the obtained hydrophilic film may deteriorate, and it may become disadvantageous practically.

It is preferable that solid content conversion weight ratio B / A + C is 1/1000-1/20 with respect to content of the component (B) in a hydrophilic treatment agent. If this ratio is less than 1/1000, sufficient deodorization and deodorization effects may not be obtained. Conversely, if this exceeds 1/20, the effect may be saturated and disadvantageously economically.

When the hydrophilic treatment agent of the present invention is applied to the surface of an aluminum-containing metal material and heated and dried, the hydrophilic film obtained is reliably present in an odorous substance such as acetaldehyde, acetic acid, ammonia, triethylamine, and mercaptans. It is effective to reduce. In particular, the above odorous substances cause a strong discomfort in the human living space, so the above-mentioned effects by the hydrophilic treatment agent of the present invention can be said to be extremely meaningful in practical use.

In order to improve the applicability of the hydrophilic treatment agent to the surface of the aluminum-containing metal material and to improve the hydrophilic durability of the film obtained by drying, a surfactant may be appropriately added to the hydrophilic treatment agent of the present invention. Surfactants which can be added include, for example, anionic surfactants, amphoteric surfactants, and nonionic surfactants.

Examples of the anionic surfactants include higher alcohol sulfate ester salts, higher alkyl ether sulfate ester salts, dialkyl sulfosuccinate salts, alkylbenzene sulfonates, higher alcohol phosphoric acid ester salts, and the like.

As an amphoteric surfactant, methyl lauryl amino propionate, lauryl amino propionate, lauryl dimethyl betaine, stearyl dimethyl betaine, lauryl dihydroxy ethyl betaine, etc. are mentioned. Moreover, as a nonionic surfactant, (poly) oxyethylene alkyl ether, (poly) oxyethylene alkyl phenyl ether, (poly) ethylene glycol, (poly) ethylene (poly) propylene glycol copolymer, (poly) tetramethylene glycol, etc. are mentioned. Can be.

Although there is no restriction | limiting in particular in solid content concentration of the organic hydrophilic treatment agent of this invention, In general, it is preferable to exist in 3 to 30% of range. It is preferable to apply and dry a hydrophilic treatment agent having an arbitrary solid content concentration on the surface of the aluminum-containing metal material to obtain a dry film in the range of 0.1 to 2.0 g / m ² . If the coating amount is less than 0.1 g / m ² , the surface of the aluminum-containing metal material cannot be uniformly coated, so that an inorganic odor caused by aluminum oxide may be felt in a wet atmosphere. When the amount of the coating exceeds 2 g / m ² , the effect is saturated, which may be economically disadvantageous.

Although there is no restriction | limiting in particular in the coating method of the hydrophilic treatment agent of this invention, The roller coat method, the immersion method, etc. are generally used. The heating and drying temperature is appropriately set within the range of 180 to 260 ° C. in which the to-be-coated object is to be dried, and within a range of 10 seconds to 1 minute of drying time. When drying temperature exceeds 260 degreeC or drying time exceeds 1 minute, a phenol compound (B) may deactivate and a deodorizing effect and a deodorizing effect may not be expected. On the other hand, when drying temperature is less than 180 degreeC or drying time is less than 10 second, hardening of a hydrophilic film may become inadequate and it may cause inadequate adhesion and hydrophilic deterioration.

Suitable aluminum-containing metal materials to which the hydrophilic treatment agent of the present invention is applied include phosphoric acid chromate, chromamic chromate, zirconium-based non-chromate and titanium non-chromate in advance in order to improve adhesion and corrosion resistance with the hydrophilic treatment agent. Chemical corrosion resistance undertreatment or coating type corrosion resistance undertreatment may be performed.

The hydrophilic treatment agent of this invention heat-drys this, and a water-soluble high molecular compound (A) dries and solidifies, and forms a solid film, or glycidyl-group containing organic compound (C) with respect to the carboxyl or amide group contained in a water-soluble high molecular compound (A) Ring-opening addition polymerization results in crosslinking reaction. By this reaction, a three-dimensional network structure is formed in the hydrophilic treatment agent layer to form an insoluble film.

At the same time as the above reaction, or after the film formation, heating (overbaking) or high temperature heat drying may cause thermal decomposition and thermal oxidative decomposition of the coating to proceed. However, since it contains a phenol compound (B), these pyrolysis and thermal oxidative decomposition can be reduced, and the generation of low molecular weight substance which becomes one cause of odor generation can be suppressed.

In the case of continuous press working of the hydrophilic aluminum-containing metal material according to the present invention by the same action, deterioration of film decomposition due to frictional heat generated between the mold and the material is suppressed, and thus the occurrence of odor is prevented.

The effect of suppressing the odor generation resulting from the thermal decomposition reaction and the thermal oxidative decomposition reaction is because the phenolic hydroxyl group contained in the skeleton of component (B) has antioxidant properties. That is, the thermal oxidation decomposition and thermal decomposition after insolubilization film formation originate from the radical reaction by which the polymer terminal group cut | disconnects rapidly, but a phenolic compound (B) functions as an antioxidant and prevents this radical reaction functionally. By suppressing thermal decomposition of such an insoluble film, it is possible to draw out the hydrophilic film performance and hydrophilic sustaining performance that the insoluble film can volatilize to the maximum.

In addition, the characteristics of the component (B) remaining stably in the insoluble coating will be explained again. Therefore, it is natural that there is no odor in the long-term use, so that the deodorizing effect is exhibited by trapping the odorous substance in the atmosphere by chemical reaction. will be.

EXAMPLE

The invention is explained in more detail by the following examples.

Examples 1-9 and Comparative Example 1

Chromate phosphate so that the amount of chromium deposited on the aluminum plate [JIS1050 material, thickness 0.1mm x width 20mm x length 30mm] pre-washed in each of Examples 1-9 and Comparative Example 1 became 20 mg / m <^2>. Treatment was carried out. It adjusted to the solid content concentration of 10% of the hydrophilic treatment agent of this invention which has the composition shown in Table 1, and this coating liquid was apply | coated on the chromate-treated both sides of the said aluminum plate by the roller coater. After coating, the film was dried by heating so that the reaching plate temperature became 220 ° C. to form a hydrophilic coating having a dry coating amount of 1 g / m ² .

The performance of the obtained hydrophilic coating was evaluated by the following test and evaluation criteria.

<Performance Evaluation Test Method>

(1) hydrophilic

5 μl (microliter) of deionized water was added dropwise onto the film surface of the hydrophilic treated material, and the contact angle of the water droplets formed was measured using a contact angle meter (FACE BA-P type, manufactured by Suwa Kasei Co., Ltd.). The initial contact angle of the film immediately after the hydrophilic treatment and the time-dependent contact angle of the film after immersion in deionized water for 100 hours were calculated.

Evaluation standard

◎: Contact angle less than 10 °

: Contact angle 10 ° or more but less than 20 °

: Contact angle 20 ° or more but less than 30 °

×: contact angle 30 ° or more

(2) breathable

A sensory test was carried out by five panelists on the material having the hydrophilic treatment film to evaluate the initial odor immediately after the organic hydrophilic treatment and further, the odor characteristic over time after immersion in deionized water for 100 hours. And the heating smell immediately after cooling 300 degreeC * 1 minute (s) at room temperature using the electric furnace was evaluated.

During the sensory test, the panelist breathed and exhaled a breath through the hydrophilic coating material.

Evaluation standard

◎: No smell at all.

: Feels dim but no discomfort and can't judge kind of smell.

: Obviously smells and judges odor type.

X: A strong smell is felt and there is aversion.

(3) deodorant

The material with the hydrophilic treatment coating was cut into dimensions of 100 x 100 mm and sealed in a 5 liter quartz container with a volume of content. Subsequently, malodorous substance gas was injected into the container, and the gas concentration after the initial and 30 minutes was measured by adjusting to a predetermined constant concentration to track the change over time. The gas concentration was measured using a gas detector tube.

The initial concentration of the malodorous substance was 100 ppm of ammonia, 50 ppm of trimethylamine, and 10 ppm of methyl mercaptan.

Deodorization rate (消臭 率) was calculated according to the formula below for the concentration of each malodorous substance.

Deodorization rate (%) = [concentration after 30 minutes (ppm)] / [initial concentration (ppm)] × 100

Evaluation standard

◎: Deodorization rate 90%

: 60% Deodorization rate 90%

: 30% Deodorization rate 60%

×: deodorization rate 30%

TABLE 1 Hydrophilic Treatment Composition

Ingredient (A) Compounding cost Ingredient (B) Compounding cost Ingredient (C) Compounding cost Treatment agent ① Copolymer of polyacrylic acid and sulfonic group-containing acrylic acid 5 Catechins from Tea Extracts 0.05 Polypropylene Glycol Diglycidyl Ether 5 Treatment agent ② Copolymer of polyacrylic acid and sulfonic group-containing acrylic acid 5 Catechins extracted from three hundred seconds 0.01 Polyethylene Glycol Diglycidyl Ether 5 Treatment agent ③ Copolymer of polyacrylic acid and sulfonic group-containing acrylic acid 5 Catechins from Camellia Extract 0.5 Polypropylene Glycol Diglycidyl Ether 5 Treatment agent ④ Copolymer of polyacrylic acid and sulfonic group-containing acrylic acid 8 Catechins from Tea Extracts 0.05 Polypropylene Glycol Diglycidyl Ether 2 Treatment agent ⑤ Copolymer of polyacrylic acid and sulfonic group-containing acrylic acid 3 Catechins from Tea Extracts 0.05 Polypropylene Glycol Diglycidyl Ether 7 Treatment agent ⑥ Copolymer of polyacrylic acid, hydroxyethyl acrylate 5 Catechins from Tea Extracts 0.05 Polypropylene Glycol Diglycidyl Ether 5 Treatment agent ⑦ Copolymer of polyacrylic acid and sulfonic group-containing acrylic acid 5 Catechins from Tea Extracts 0.05 Polypropylene Glycol Diglycidyl Ether 5 Treatment agent ⑧ Copolymer of polyacrylic acid and sulfonic group-containing acrylic acid 10 Catechins from Tea Extracts 0.05 - - Treatment agent ⑨ Copolymer of polyacrylic acid and sulfonic group-containing acrylic acid 2 Catechins from Tea Extracts 0.05 Polypropylene Glycol Diglycidyl Ether 8 Treatment ⑩ Copolymer of polyacrylic acid and sulfonic group-containing acrylic acid 5 Catechins from Tea Extracts 0 Polypropylene Glycol Diglycidyl Ether 5

(Note) 1) The compounding ratio of each component is shown by weight part in terms of solid content.

2) Deionized water was used as dilution water in each treatment.

Table 2 shows the hydrophilic treatment agents (1) to (10) used in each of Examples 1 to 9 and Comparative Example 1, and the treatment conditions thereof. And in Examples 1-9, hydrophilic treatment agents (1)-(9) were used. In Comparative Example 1, a hydrophilic treatment agent (10) having a composition other than the present invention was used. And in Table 3, the performance evaluation result of each hydrophilic process material of Examples 1-9 and Comparative Example 1 is shown.

[Table 2] Hydrophilic treatment agent and treatment conditions

Treatment Heat drying temperature (℃) Drying time (seconds) Dry film amount (g / m ² ) Example 1 Treatment agent ① 220 30 One Example 2 Treatment agent ② 220 30 One Example 3 Treatment agent ③ 220 30 One Example 4 Treatment agent ④ 220 30 One Example 5 Treatment agent ⑤ 220 30 One Example 6 Treatment agent ⑥ 220 30 One Example 7 Treatment agent ⑦ 220 30 One Example 8 Treatment agent ⑧ 220 30 One Example 9 Treatment agent ⑨ 220 30 One Comparative Example 1 Treatment ⑩ 220 30 One

[Table 3] Performance evaluation test results

Hydrophilic Odor Deodorant Early After time Early After time After heating ammonia Triethylamine Methyl mercaptan Example 1 ◎ ◎ ◎ ◎ ◎ ○ ◎ ◎ Example 2 ◎ ◎ ○ ○ ○ ○ ○ ○ Example 3 ◎ ◎ ◎ ◎ ◎ ○ ◎ ◎ Example 4 ◎ ◎ ◎ ◎ ◎ ○ ◎ ◎ Example 5 ◎ ◎ ◎ ◎ ◎ ○ ◎ ◎ Example 6 ◎ ◎ ◎ ◎ ◎ ○ ◎ ◎ Example 7 ◎ ◎ ◎ ◎ ◎ ○ ◎ ◎ Example 8 ◎ ○ ◎ ◎ ◎ ○ ◎ ◎ Example 9 ○ ○ ◎ ○ ◎ ○ ◎ ◎ Comparative Example 1 ◎ ○ △ △ × × × ×

As apparent from Table 3, the treated materials of Examples 1 to 9 using the organic hydrophilic treatment agent of the present invention had good hydrophilicity, no initial odor and no odor after heating, and further showed a deodorizing effect of reducing the odor substance concentration.

However, in Comparative Example 1, since the phenol compound (B) was not contained, the odor preventing property was deteriorated, and further, no deodorizing effect was observed.

The hydrophilic film formed on the surface of an aluminum-containing metal material using the hydrophilic treatment agent of the present invention has excellent hydrophilicity even after aging. Moreover, it is natural that there is no initial odor, so that odor is prevented even after heating to decompose organic matter. Furthermore, it has a high deodorizing effect which reliably reduces the amount in the atmosphere in which various odorous substances are present.

Therefore, the hydrophilic treatment agent of the present invention has extremely high practical value, and thus has high adaptability to an aluminum material for heat exchanger of air conditioner parts, and can be applied to other wide applications.

Claims (6)

Hydrophilic polymer compound (A) in which at least one selected from a carboxyl group, an amide group, a hydroxyl group, a sulfone group, and a phosphon group is bonded to the main chain, and a polycyclic structure having at least one aromatic nucleus structure in total of at least 5 An organic hydrophilic treatment agent for aluminum-containing metal materials, comprising a phenol compound (B) to which a siloxane group is directly bonded. The organic hydrophilic treatment agent for aluminum-containing metal material according to claim 1, further comprising a glycidyl group-containing organic compound (C). The organic hydrophilic treatment agent for aluminum-containing metal material according to claim 1, wherein the phenol compound (B) is selected from polyhydroxy compounds represented by the following structural formula (I). [Wherein in formula (I), X represents an aromatic group substituted by two or more hydroxyl groups, and Y represents a hydroxyl group or the following formula (II) Represents an aromatic group represented by The method of claim 3, wherein the polyhydroxy compound of the general formula (I) is (+)-catechin, (-)-epicatechin, (+)-gallocatechin, (-)-epicatechin gallate, (-)-epi An organic hydrophilic treatment agent for aluminum-containing metal materials selected from gallocatechin gallate and (-)-epigallocatechin. The organic hydrophilicity for aluminum-containing metal material according to claim 2, wherein the solid content conversion weights A, B and C of the components (A), (B) and (C) satisfy the following relations (1) and (2). Treatment agent. A / C = 9/1-3/7 (1) B / (A + C) = 1/1000 to 1/20 (2) The organic hydrophilic treatment agent for aluminum containing metal materials as described in any one of Claims 1-5 is apply | coated to at least one surface of an aluminum containing metal material, and it heat-drys and forms the organic hydrophilic coating layer, The aluminum characterized by the above-mentioned. Surface hydrophilic treatment method of a containing metal material.