JP2011000717A - Aluminum material for interior and exterior and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aluminum material for interior and exterior which exhibits hydrophilicity in a short time and includes a hydrophilicity maintaining property and a method of manufacturing the same.SOLUTION: The aluminum material for interior and exterior includes a base material 2 and a photocatalytic layer 3 formed on the surface of the base material 2. The photocatalytic layer 3 is formed by dispersing photocatalyst particles 32 in a base resin 31 comprising a silicone resin. The silicone resin includes ≤85° contact angle with water when a film formed from only the silicone resin without containing the photocatalyst particles is formed. The content of the photocatalyst particles 32 is 10-80 PHR. The silicone resin is preferably formed using a coating material for a silicone resin comprising an alkoxy oligomer containing ≥10 mol% Q unit as a four functional silicon structural unit expressed by a general formula SiZand a quick drying silicone resin.

Description

  The present invention relates to an aluminum material used for an exterior material used in an exposed state outdoors or an interior material used in an exposed state indoors.

  Examples of the exterior material used in an exposed state outside the building include an outer wall of a building, a roof, a fence, a shutter, a road noise barrier, a guardrail, and the like. In addition, examples of interior materials used in an exposed state in the room include, for example, automobile interiors, train interiors, hospital interiors, cooking room interiors, clean room interiors, blinds, fluorescent lamp reflectors, furniture, and other furniture, office equipment, etc. There are things.

As materials for these interior materials or exterior materials (hereinafter referred to as interior / exterior materials as appropriate), aluminum (including pure aluminum and aluminum alloys) materials that are lightweight and have appropriate processability and corrosion resistance are widely used. Yes.
Moreover, the aluminum coating material which gave the synthetic resin coating film on the surface is used for the use which improves corrosion resistance more.

  On the other hand, since the interior / exterior material is used while being exposed indoors or outdoors, dirt may adhere to the surface after many years of use, and the appearance characteristics may be greatly impaired. In the exterior material, the adhesion of dirt on the surface means that air pollutants, oils, resin components, etc. are left behind in the rain and accumulate. Even in interior materials, oils, resin components, dust, and the like carried by indoor air adhere to the surface as dirt for many years.

  In addition, in interior materials, chemical substances such as formaldehyde and acetaldehyde generated from building materials and furniture, and organic chemical substances such as ammonia and hydrogen sulfide that cause odors such as cigarette smoke may adhere. These substances cause sick house syndrome and atopy, and countermeasures are required.

As a measure for suppressing the adhesion and remaining of a foreign matter that becomes a problem on the surface of such an inner / outer material, a substance having a photocatalytic decomposition function has been applied to the surface of the inner / outer material.
When the base material of the interior / exterior material is an aluminum material, a method in which a substance having a photocatalytic decomposition function is contained in the coating film and applied to the surface of the base material is employed.

  When an epoxy resin, a urethane resin or the like is applied as the base resin of the coating film, there is a problem that these resins themselves are decomposed by photocatalytic resolution. Therefore, it is desirable to apply a silicone resin or a fluororesin that is not easily decomposed into a photocatalyst. However, silicone resins and fluororesins generally have water repellency. When the surface is water-repellent, it seems that foreign matters such as dirt are hardly attached at first glance. However, once an inorganic substance is attached, it is difficult to wash away with water or the like. Therefore, a hydrophilic surface is preferable as a surface that suppresses adhesion of foreign matter. And simply using a silicone resin or a fluororesin as the base resin of the coating film is not preferable because hydrophilicity cannot be obtained.

On the other hand, there is a method of hydrophilizing the coating film by utilizing the superhydrophilization of the photocatalyst itself. However, when a photocatalyst is added to a general silicone resin, there is a problem that it takes a very long time to make it hydrophilic by photoexcitation.
From the above situation, there is a need for an interior / exterior aluminum material that has a high organic matter decomposing ability but does not decompose the base resin and is coated with a hydrophilic coating film in a short time.

Japanese Patent Laid-Open No. 9-40907 Japanese Patent Laid-Open No. 9-40909 JP-A-9-111188

  The present invention has been made in view of such conventional problems, and is intended to provide an aluminum material for interior and exterior, which has been provided with a coating film that exhibits hydrophilicity in a short time and has hydrophilic durability, and a method for producing the same. To do.

1st invention is the aluminum material for interior / exterior which consists of a base material and the photocatalyst layer formed in the surface of this base material,
The photocatalyst layer is formed by dispersing photocatalyst particles in a base resin made of silicone resin.
The silicone resin has a contact angle with water of 85 ° or less when forming a coating film made of only the silicone resin without containing the photocatalyst particles,
Content of the said photocatalyst particle exists in the aluminum material for interior and exterior characterized by being 10PHR-80PHR (Claim 1).

The second invention is at least tetrafunctional silicon represented by the general formula SiZ ₄ (Z represents a hydrolyzable group or a residue bonded to another silicon atom through a siloxane bond). Preparation of photocatalyst layer coating material containing photocatalyst particles in a silicone resin coating material containing an alkoxy oligomer containing 10 mol% or more of Q units as a structural unit with respect to all siloxane units and a quick-drying silicone resin Then, the photocatalyst coating material is applied so as to cover the surface of the base material and dried to form a photocatalyst layer containing 10 PHR to 80 PHR of the photocatalyst particles. (Claim 9).

The aluminum material for interior / exterior of the first invention has a photocatalyst layer in which a predetermined amount of photocatalyst particles are dispersed in a base resin made of a specific silicone resin on the surface of a base material.
That is, the silicone resin has a contact angle with water of 85 ° or less when a coating film made of only the silicone resin is formed without containing the photocatalytic particles. The photocatalyst layer formed by dispersing the photocatalyst particles in the base resin made of the above silicone resin having specific hydrophilic properties is not necessarily clear in detail, but as known from the examples described later, The base resin does not hinder superhydrophilicity due to photoexcitation of the photocatalyst particles, and can be hydrophilized in a short time.

In addition, since the base resin is a silicone resin, the base resin is difficult to be decomposed by the photocatalyst particles and can hold the photocatalyst particles well, so that it exhibits photocatalytic activity such as hydrophilicity and organic decomposability over a long period of time. can do.
Thus, according to the present invention, it is possible to obtain an interior / exterior aluminum material that exhibits hydrophilicity in a short time and has hydrophilic durability. If this aluminum material for interior and exterior is used, the adhesion of dirt can be suppressed and the appearance characteristics can be maintained for a long time, and if it is used for interior, it is also effective for measures against sick house and the like.

The production method of the second invention uses the above-mentioned specific silicone resin coating as a base as a coating applied to the surface of the substrate. When this silicone resin paint has the above-mentioned specific content, when a coating film made of only the silicone resin is formed without containing the photocatalyst particles, the contact angle with water is 85 ° or less. Demonstrate the characteristics. Therefore, as described above, the photocatalyst layer obtained by applying the photocatalyst layer coating material containing the photocatalyst particles to the silicone resin paint has a short base resin that does not inhibit superhydrophilicity due to photoexcitation of the photocatalyst particles. It can be hydrophilized over time. In addition, since the base resin is a silicone resin, the base resin is difficult to be decomposed by the photocatalyst particles and can hold the photocatalyst particles well, so that it exhibits photocatalytic activity such as hydrophilicity and organic decomposability over a long period of time. can do.
As described above, according to the present invention, it is possible to produce an aluminum material for interior and exterior that exhibits hydrophilicity in a short time and has hydrophilic durability.

As described above, the interior / exterior aluminum material of the first invention comprises a base material and a photocatalyst layer formed on the surface of the base material.
As the base material, various aluminum materials (aluminum or aluminum alloy) can be used. The material can be changed according to the specific application.
Further, the base material may be a so-called plate material or an extrusion mold material. Since the interior / exterior material often exposes a portion on a flat surface, a material having a plate-like portion is suitable as the extrusion material used for the base material. Further, when the base material is a plate material, it is easy to process, and can be applied to a wide range of uses.

The photocatalyst layer is formed by dispersing photocatalyst particles in a base resin made of a silicone resin.
As the silicone resin, any silicone resin can be used as long as the contact angle with water at the time of forming a coating film made of only the silicone resin without containing the photocatalyst particles is 85 ° or less.
When the contact angle of the silicone resin with water exceeds 85 °, it takes a long time for the photocatalyst layer to exhibit hydrophilicity upon irradiation with ultraviolet rays, and lacks practicality. More preferably, the silicone resin has a contact angle with water of 70 ° or less.

The silicone resin having a contact angle of 85 ° or less is, for example, the silicone resin having at least a general formula SiZ ₄ (Z is a hydrolyzable group or a residue bonded to another silicon atom by a siloxane bond). For silicone resins comprising an alkoxy oligomer containing 10 mol% or more of the Q unit as a tetrafunctional silicon structural unit represented by the formula (1) and a quick-drying silicone resin. It can be formed using a paint (claim 2).
Moreover, there exists 2nd invention mentioned above as a manufacturing method using this coating material for silicone resins.

  When mixing the alkoxy oligomer and the quick-drying silicone resin, it is preferable to mix an organic solvent type if it is an organic solvent type and an aqueous type if it is aqueous. In particular, the aqueous one may aggregate when the polarity (cation, anion, nonion) of the resin being emulsified is different, and therefore it is preferable to make the emulsion polar in consideration of stability.

The Q unit is a silicon structural unit containing four hydrolyzable groups that can finally form a silanol group or can be condensed with other silicon to form a siloxane bond.
In addition, said Z may be 1 type in the residue couple | bonded with the other silicon atom by the hydrolyzable group or the siloxane bond, However, The combination of 2 or more types may be sufficient as it.
A conventionally known hydrolyzable group represented by Z can be used, and examples thereof include a methoxy group, an ethoxy group, a butoxy group, an isopropenoxy group, an acetoxy group, and a butanoxime group.

  The above alkoxy oligomer is a relatively low molecular weight silicone resin having a molecular skeleton that is blocked with an alkoxysilyl group, among silicone resins that are polymers having an inorganic siloxane (Si-O) bond as a main skeleton and various organic substituents in branches and leaves. It has a feature that it can be cured at room temperature / moisture.

In the alkoxy oligomer containing 10 mol% or more of the Q unit as the tetrafunctional silicon structural unit represented by the general formula SiZ ₄ with respect to the total siloxane units, the portion consisting of the Q unit is such that both of the side chains of Si are It is an alkoxyl group. Therefore, when a photocatalyst layer is formed using a coating for silicone resin containing this alkoxy oligomer, a hydrophilic hydroxy group exists on the surface of the photocatalyst layer after curing, and hydrophilicity can be imparted to the photocatalyst layer. .

  As long as the said alkoxy oligomer satisfy | fills the said conditions, any alkoxy oligomer may be used and it can manufacture by a conventionally well-known various method.

  The quick-drying silicone resin may be any known silicone resin as long as it dries within 30 seconds at 100 to 300 ° C. (Phenyl type, phenyl type, epoxy type, mercapto type, acrylic type, etc.), organic substituent-free type silicone alkoxy oligomers, etc. may be selected and used.

  Since the silicone resin paint contains the quick-drying silicone resin, the silicone resin paint can be dried in a short time, so that an effect of excellent productivity can be obtained. Moreover, the formed photocatalyst layer can have adhesiveness.

The silicone resin paint has a Q unit as the tetrafunctional silicon structural unit represented by the above general formula SiZ ₄ that reduces the drying property when the photocatalyst layer is formed in an amount of 10 mol% or more based on the total siloxane units. A photocatalyst with a low contact angle that is dried under pre-coating conditions, that is, within a period of 1 minute at 100 ° C. to 300 ° C., even if it contains an alkoxy oligomer contained therein, by blending with the quick-drying silicone resin. A layer can be formed.

  A curing catalyst may be used in combination with the silicone resin paint as necessary. The curing catalyst can be appropriately selected from cationic, anionic and nonionic in consideration of the polarity of the emulsion used and the required drying speed.

As the photocatalyst particles, any substance that exhibits hydrophilicity by photoexcitation can be used. For example, titanium oxide, zinc oxide, tin oxide, lead oxide, ferric oxide, dibismuth trioxide, three Examples include tungsten oxide and strontium titanate.
And from a chemical stability, cost, and a viewpoint of safety | security, it is preferable that the said photocatalyst particle uses a titanium oxide.

  The titanium oxide includes a rutile type, anatase type, and brookite type due to the difference in crystal form, and any of them can be used. However, since the photocatalytic activity is high, it is preferable to use an anatase type.

The hydrophilization and organic decomposition of titanium oxide are reactions that occur on the surface of titanium oxide. Since the photocatalytic activity is higher as the surface area is larger, the average particle size of titanium oxide is 100 nm or less, more preferably 50 nm or less. More preferably, it is 10 nm or less.
Moreover, you may use the said titanium oxide surface-treated with apatite etc.
The photocatalyst particles to be added are preferably those dispersed in water by a dispersant. Examples of the dispersant include nonionic surfactants, anionic surfactants, and inorganic dispersants.

The content of the photocatalyst particles is 10 PHR to 80 PHR (Per hundred Resin, the ratio of the photocatalyst particles when the weight of the resin solid content in the photocatalyst layer is 100).
When the content of the photocatalyst particles is less than 10 PHR, the photocatalyst particles are not sufficiently exposed on the surface, and thus there is a possibility that the photocatalyst particles are not completely hydrophilicized even when exposed to light. On the other hand, when the content of the photocatalyst particles exceeds the resin solid content concentration of 80 PHR, the adhesion of the coating film may not be obtained.
The content of the photocatalyst particles is preferably 20 to 50 PHR.

  It is preferable that the silicone resin coating material in the method for producing the interior / exterior aluminum material is applied to the surface of the substrate by roll coating or spray coating. Moreover, it is preferable to dry the said coating material for silicone resins on the conditions of less than 1 minute at 100-300 degreeC.

Moreover, it is preferable that the said coating material for silicone resins contains 10 to 90% of said alkoxy oligomers by resin solid content concentration (Claims 3 and 10).
When the content of the alkoxy oligomer is less than 10% in the resin solid content concentration, the hydrophilicity becomes insufficient, and the contact angle of the coating film may not be 85 ° or less. On the other hand, when the content of the alkoxy oligomer exceeds 90% in the resin solid content concentration, the coating film may not be dried.

Moreover, it is preferable that the said coating material for silicone resins is a water-soluble emulsion type (Claims 4 and 11).
In this case, there is no risk of ignition / explosion at the time of painting, odor is reduced, and generation of VOC (volatile organic compound) gas is also suppressed. it can.

The photocatalyst particles are preferably anatase-type titanium oxide having an average particle size of 100 nm or less (claims 5 and 12).
In this case, as described above, since the surface area of titanium oxide is increased, the photocatalytic activity such as hydrophilization and organic decomposition occurring on the surface of titanium oxide is increased.

The photocatalyst layer preferably has a surface roughness Ra of 0.1 μm or more (claims 6 and 13).
In this case, the photocatalyst particles are sufficiently exposed on the surface of the photocatalyst layer, and the organic decomposability can be exhibited well.
The coating film surface roughness Ra is more preferably 0.15 μm to 0.5 μm.
The surface roughness Ra here is based on JIS B0601-2001.

Moreover, it is preferable that the base-treatment layer is formed between the said base material and the said photocatalyst layer (Claims 7 and 14).
In this case, the adhesion between the substrate and the photocatalyst layer can be improved.

  Chromate treatment such as phosphate chromate and chromate chromate as the undercoat layer, and non-chromate such as titanium phosphate, zirconium phosphate, molybdenum phosphate, zinc phosphate, titanium oxide and zirconium oxide other than chromium compounds There are films obtained by chemical film treatment (chemical conversion treatment) such as treatment. The chemical film processing method includes a reaction type and a coating type, and any method may be employed in the present invention.

  The base material is an extrusion mold material having a plate material or a plate-like portion, and the thickness of the plate material or plate-like portion is preferably 0.2 mm or more (claims 8 and 15). When this thickness is less than 0.2 mm, there is a possibility that sufficient rigidity cannot be obtained when used as an inner / outer material. On the other hand, the upper limit of the thickness of the substrate is not particularly limited, but a practical range is about several mm.

Example 1
In this example, inner and outer aluminum materials (sample E1 to sample E14, sample C1 to sample C4) were produced as examples and comparative examples according to the inner and outer aluminum materials of the present invention.
As shown in FIG. 1, the interior / exterior aluminum material 1 of this example includes a base material 2 and a photocatalyst layer 3 formed on the surface of the base material 2. The photocatalyst layer 3 is formed by dispersing photocatalyst particles 32 in a base resin 31 made of a silicone resin.
This will be described in detail below.

First, a Q unit as a tetrafunctional silicon structural unit represented by the general formula SiZ ₄ (Z represents a hydrolyzable group or a residue bonded to another silicon atom through a siloxane bond). A water-soluble emulsion type coating for a silicone resin prepared by mixing an alkoxy oligomer containing 10 mol% or more with respect to all siloxane units and a quick-drying silicone resin was prepared.

X-52-8212 manufactured by Shin-Etsu Chemical Co., Ltd. as an alkoxy oligomer containing 10 mol% or more of the Q unit as a tetrafunctional silicon structural unit represented by the above general formula SiZ ₄ with respect to all siloxane units and improving hydrophilicity. A water-soluble emulsion was prepared.
Further, as a quick-drying silicone resin that dries within 30 seconds at 100 to 300 ° C., a water-soluble emulsion of Shin-Etsu Chemical X-52-8148 was prepared.

First, the alkoxy oligomer and the quick-drying silicone resin are blended at a resin solid content concentration ratio shown in Table 1 without containing photocatalyst particles, and Shin-Etsu Chemical CAT-PM-4PS-2 is added as a curing catalyst. Thus, paints for silicone resin (resin 1 to resin 9) were produced.
And on the aluminum plate of JIS A1050-H26 and thickness 0.5mm, the said coating material for silicone resins was apply | coated using the bar coater, it was made to dry at 200 degreeC, and the coating film with a film thickness of 2 micrometers was produced. The characteristics were evaluated. The results are shown in Table 1.

<Adhesion>
The adhesion of the coating film made of silicone resin was evaluated by making a 4 cm incision reaching the substrate with a cutter knife, peeling the cellophane tape in close contact therewith, and checking for the presence or absence of coating film peeling. The case where peeling was not confirmed was set to pass (evaluation (circle)), and the case where peeling was confirmed was set to fail (evaluation x).

<Hydrophilicity>
The hydrophilicity of the coating film made of a silicone resin was evaluated by dropping 2 μL of pure on each test piece and measuring the contact angle of water droplets generated thereby with a goniometer.
The case where the contact angle was 85 ° or less was regarded as acceptable, and the case where the contact angle exceeded 85 ° was regarded as unacceptable.

As is known from Table 1, the resin 1 to the resin 7 have a contact angle with water of 85 ° or less when the coating film made of only the silicone resin is formed without including the photocatalyst particles, and the adhesiveness is also good. Met.
The resin 8 was made of a kind obtained by making X-52-8212 made by Shin-Etsu Chemical into a water-soluble emulsion, and the paint for silicone resin was not dried, and a coating film could not be formed.
In addition, the resin 9 was made of a kind obtained by making X-52-8148 made by Shin-Etsu Chemical into a water-soluble emulsion, and the contact angle was 90 °, and the hydrophilicity was unacceptable.

  Next, the photocatalyst particles 32 (an anatase type titanium oxide ST-01 (average particle size 8 nm) manufactured by Ishihara Sangyo Co., Ltd., dispersed in water) are dispersed in the above-described coating for silicone resin (resin 1 to resin 7 and resin 9). A photocatalyst layer coating was prepared by adding so that the weight of the photocatalyst particles when the weight of the photocatalyst layer was 100 was the amount shown in Table 2.

In addition, as the base material 2, an aluminum plate having a material JIS A 1050-H26 and a thickness of 0.5 mm is prepared, and the chemical conversion film 4 is formed on the surface by immersing phosphoric acid chromate on the surface of the base material 2. did.
Then, the photocatalyst layer 3 having the film thickness shown in Table 2 is formed on the surface of the base material 2 by applying a coating for the photocatalyst layer on the chemical conversion film 4 using a bar coater and drying at 200 ° C. And the aluminum material 1 for interior / exterior (sample E1-sample E14 and sample C1-sample C4) was produced.

About the obtained aluminum material 1 for interior / exterior (sample E1-sample E14 and sample C1-sample C4), the surface roughness Ra of the photocatalyst layer 3 was measured, and hydrophilicity evaluation and evaluation of organic substance decomposability were performed. The results are shown in Table 2.
<Surface roughness>
The surface roughness was measured using a Shimadzu confocal laser microscope OLS3000.

<Hydrophilicity evaluation>
The hydrophilicity evaluation was performed by continuously irradiating the photocatalyst layer surface of the aluminum material for interior and exterior with ultraviolet rays (1500 μW / cm ² ), and after irradiating the ultraviolet rays at 0 h, 24 h, 48 h, 72 h, 144 h, 240 h, 500 h, and 1000 h. The contact angle with water was measured, and the time until hydrophilization was observed.
The case where the contact angle is 40 ° or less at 1000 h after UV irradiation is evaluated as Δ, the case where the contact angle is 40 ° or less at 500 h is evaluated as ○, and the case where the contact angle is 40 ° or less at 240 h. Evaluation ◎. The case where the contact angle exceeded 40 ° at 1000 h was evaluated as x. A case where the evaluation is Δ, ○, and ◎ is acceptable, and a case where the evaluation is × is unacceptable.

<Organic substance degradability>
As shown in FIG. 2, the evaluation of organic substance decomposability was performed by bringing the methylene blue aqueous solution 5 into contact with the interior / exterior aluminum material 1 and irradiating with ultraviolet rays 6. Specifically, first, a double-sided tape 7 having a 2 cm × 2 cm through hole was laminated on the surface of the photocatalyst layer 3 of the inner and outer aluminum material 1. Next, the methylene blue aqueous solution 5 was put into the recess 71 formed by the inner and outer aluminum material 1 and the through hole of the double-sided tape 7 to bring the photocatalyst layer 3 and the methylene blue aqueous solution 5 into contact with each other. A PET resin plate 8 having a thickness of 1 mm was laminated thereon to form a sealed state. In this state, the methylene blue aqueous solution 5 was irradiated with 1500 μW / cm ² of ultraviolet rays 6 through the PET resin plate 8 for 1 hour, and the color change of the methylene blue aqueous solution 5 was observed.
(Evaluation criteria)
◎: When the blue color disappears completely,
○: When the blue color almost disappears
△: When the blue color is a little thin,
X: When no change is seen in blue.

As can be seen from Table 2, Sample E1 to Sample E14 as examples are hydrophilized in a short time. Moreover, since the base resin of the photocatalyst layer of the samples E1 to E14 contains a hydrophilic silicone resin, it is difficult to be decomposed by the photocatalyst and can exhibit photocatalytic activity over a long period of time. It can also be seen that the larger the surface roughness Ra of the photocatalyst layer, the better the organic decomposability can be achieved.
From this, according to this invention, it turns out that the aluminum material for interior / exterior which shows hydrophilic property in a short time and has hydrophilic durability can be obtained.

Further, as is known from Table 2, the sample C1 as a comparative example was rejected because it did not contain photocatalyst particles.
Further, Samples C2 to C4 as comparative examples were unacceptable because the hydrophilicity of the base resin was low, and thus hydrophilicity could not be confirmed even after 1000 hours had elapsed after irradiation with ultraviolet rays.

Explanatory drawing which shows the aluminum material for interior / exterior in Example 1. FIG. Explanatory drawing which shows the organic substance decomposition property evaluation method in Example 1. FIG.

1 Aluminum material for interior and exterior 2 Base material 3 Photocatalyst layer 31 Base resin 32 Photocatalyst particles

Claims (15)

An inner and outer aluminum material comprising a base material and a photocatalyst layer formed on the surface of the base material,
The photocatalyst layer is formed by dispersing photocatalyst particles in a base resin made of silicone resin.
The silicone resin has a contact angle with water of 85 ° or less when forming a coating film made of only the silicone resin without containing the photocatalyst particles,
Content of the said photocatalyst particle is 10PHR-80PHR, The aluminum material for interior / exterior characterized by the above-mentioned. According to claim 1, said silicone resin, at least, the general formula SiZ ₄ (Z is a hydrolyzable group, or represents one of the residues that are bonded to other silicon atoms by siloxane bond) represented by It is formed by using a silicone resin paint comprising an alkoxy oligomer containing 10 mol% or more of Q units as tetrafunctional silicon structural units with respect to all siloxane units and a quick-drying silicone resin. A featured aluminum material for interior and exterior.   3. The aluminum material for interior and exterior according to claim 2, wherein the silicone resin paint contains 10 to 90% of the alkoxy oligomer in a resin solid content concentration.   4. The interior / exterior aluminum material according to claim 2, wherein the silicone resin paint is a water-soluble emulsion type.   The aluminum material for interior and exterior according to any one of claims 1 to 4, wherein the photocatalyst particles are anatase-type titanium oxide having an average particle size of 100 nm or less.   The aluminum material for interior and exterior according to any one of claims 1 to 5, wherein the photocatalyst layer has a surface roughness Ra of 0.1 µm or more.   The aluminum material for interior and exterior according to any one of claims 1 to 6, wherein a base treatment layer is formed between the base material and the photocatalyst layer.   In any 1 item | term of Claims 1-7, the said base material is an extrusion type | mold material which has a board | plate material or a plate-shaped part, and the thickness of the said board | plate material or a plate-shaped part is 0.2 mm or more, The inside and outside characterized by the above-mentioned. Wearing aluminum material. Q unit as a tetrafunctional silicon structural unit represented by at least the general formula SiZ ₄ (Z represents either a hydrolyzable group or a residue bonded to another silicon atom through a siloxane bond) Of a photocatalyst layer in which a photocatalyst particle is contained in a silicone resin paint comprising an alkoxy oligomer containing 10 mol% or more of all siloxane units and a quick-drying silicone resin, and the photocatalyst paint A photocatalyst layer containing 10 PHR to 80 PHR of the photocatalyst particles is formed by applying and drying so as to cover the surface of the base material.   10. The method for producing an interior / exterior aluminum material according to claim 9, wherein the silicone resin paint contains 10 to 90% of the alkoxy oligomer in a resin solid content concentration.   11. The method for producing an aluminum material for interior / exterior according to claim 9, wherein the silicone resin paint is a water-soluble emulsion type.   The method for producing an aluminum material for interior and exterior according to any one of claims 9 to 11, wherein the photocatalyst particles are anatase-type titanium oxide having an average particle size of 100 nm or less.   The method for producing an aluminum material for interior and exterior according to any one of claims 9 to 12, wherein the photocatalyst layer has a surface roughness Ra of 0.1 µm or more.   The method for producing an aluminum material for interior and exterior according to any one of claims 9 to 13, wherein a base treatment layer is formed between the base material and the photocatalyst layer.   The base material according to any one of claims 9 to 14, wherein the base material is an extrusion mold material having a plate material or a plate-like portion, and the thickness of the plate material or the plate-like portion is 0.2 mm or more. A method for producing a worn aluminum material.

Images