JP4569996B2 - Exterior material - Google Patents

Description

[0001]
The present invention relates to an exterior material used for a house, a building, and the like, and more particularly, to an exterior material having a function of maintaining the performance of preventing dirt from being attached for a longer time.
[0002]
[Prior art]
Acrylic resin-based exterior materials, ceramic resin-based exterior materials, and the like are used as exterior materials for covering the outer walls of houses and buildings.
[0003]
[Problems to be solved by the invention]
Houses, building outer walls, and roofing materials are exposed to the outdoors, and are therefore easily contaminated by combustion products such as exhaust gas and soot suspended in the atmosphere. However, it is possible to clean the exterior material of a relatively low part of the outer wall of a house or building, but cleaning of the outer wall or roofing material of a high place has to be commissioned by a specialist, and it is expensive. Cleaning work in is also dangerous.
[0004]
Moreover, even if it cleans periodically, the stain | pollution | contamination adhering to the surface is hard to remove, Therefore, an outer wall may discolor as time passes.
[0005]
An object of the present invention is to provide an exterior material that is less likely to have dirt attached thereto and that can be easily washed away.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 solves the above-mentioned problem, and a printing layer and a printing protective layer are laminated on the surface of the base material of the exterior material, and the photocatalyst particles are dispersed on the surface. partially transparent corrosion-resistant resin layer exposed is provided on the surface, become by bright-repellent aqueous silicone layer permeability is provided thereon, wherein the water-repellent silicone layer comprises a material that prevents hydrophilic by photoexcitation In addition, a large number of openings that penetrate the water-repellent silicone layer are formed, and the photocatalyst particles contained in the transparent corrosion-resistant resin layer are exposed from the openings .
[0007]
In the first aspect of the present invention, a porous opening or a joint opening can be provided as a large number of openings.
[0010]
In the present invention, cobalt or a cobalt compound can be applied as the substance that prevents hydrophilicity due to photoexcitation.
[0011]
In the exterior material according to claim 1, the surface of the exterior material is composed of a water-repellent silicone layer having a large number of openings, and the photocatalyst exposed from the openings is exposed to sunlight after raining or watering. An acidic substance is generated when it hits, and this acidic substance works to break down the dirt, so it is easy to get dirt on the surface of the exterior material, especially combustion products such as exhaust gas and soot that floats in the atmosphere. Removed. In addition, since moderate water repellency is maintained by the surface of the water-repellent silicone layer, a surface that is permanently hard to become dirty is formed.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a first embodiment of the exterior material of the present invention.
A water-repellent silicone layer containing a substance 6 for preventing hydrophilicity due to photoexcitation of a photocatalyst, which is provided with a corrosion-resistant resin layer 3 containing photocatalyst particles 2 on a substrate 1 and having a large number of openings 4 thereon. 5 is provided. The photocatalyst particles 2 are dispersed so as to be partially exposed on the surface of the corrosion-resistant resin layer 3.
[0014]
In the exterior material of the present invention, the base material 1 can be a woven or non-woven fabric made of polyester resin, acrylic resin, glass fiber, nylon resin, glass fiber, polyester fiber, or aramid fiber.
[0015]
The photocatalyst particles 2 dispersed and contained in the corrosion resistant resin layer 3 were irradiated with light (excitation light) having energy (ie, shorter wavelength) larger than the energy gap between the conduction band and the valence band of the crystal. Sometimes a substance that can generate conduction electrons and holes due to the excitation (photoexcitation) of electrons in the valence band, such as anatase titanium oxide, zinc oxide, tin oxide, ferric oxide, three Oxides such as dibismuth oxide, tungsten trioxide, and strontium titanate can be suitably used. As a light source used for photoexcitation of the photocatalyst, sunlight is used because it is exposed to sunlight during the day. In addition, for the exterior material attached to the north wall, which is relatively difficult for light to hit, in order to promote the photocatalytic reaction, it is possible to compensate for the small amount of sunlight by irradiating light with an infrared lamp or the like. Good.
[0016]
Next, as the resin constituting the corrosion-resistant resin layer 3, silicone resin, acrylic resin, acrylic silicon resin, silicone polycarbonate copolymer, nylon resin, hard vinyl chloride resin, or the like can be applied.
[0017]
The corrosion-resistant resin layer 3 including the photocatalyst particles 2 is a coating composition in which a photocatalyst is dispersed in a silicone resin, an acrylic resin, an acrylic silicone resin, a silicone polycarbonate copolymer, a nylon resin, a hard vinyl chloride resin or the like together with a solvent such as ethanol or propanol. Can be formed by coating.
[0018]
The photocatalyst particles 2 dispersed in the corrosion-resistant resin layer 3 reacts with ethanol or the like contained in the corrosion-resistant resin layer or reacts with rainwater or the like when exposed to light such as sunlight. Flows out to the surface of the exterior material, that is, the surface of the water repellent silicone layer 5, and cleans the surface of the exterior material by decomposing dirt components on the surface of the exterior material. Further, since the appropriate water repellency is maintained by the surface of the water repellent silicone layer, a surface of the exterior material that is hardly permanently soiled is formed.
[0019]
The exterior material of a 1st embodiment can comprise the wall surface which has the surface which is hard to get dirty permanently by apply | coating a transparent adhesive to the back surface of a base material, and sticking it on outer walls, such as a house and a building.
[0020]
The water repellent silicone constituting the water repellent silicone layer 5 has an average composition formula R _p SiO _{(4-p) / 2}
(In the formula, R is a functional group composed of one or more monovalent organic groups, or a functional group composed of two or more selected from monovalent, organic groups and marine groups, and p is 0. <P <2 is the number satisfying).
[0021]
Examples of the substance 6 for preventing hydrophilicity by photoexcitation dispersed in the water-repellent silicone layer 5 include cobalt or a cobalt alloy, cobalt oxide, cobalt chloride, cobalt sulfate, cobalt iodide, cobalt bromide, cobalt acetate, cobalt chlorate. Cobalt compounds such as cobalt nitrate can be preferably used.
[0022]
The film thickness of the water repellent silicone layer 5 is desirably 0.4 μm or less. By setting the thickness to 0.4 μm or less, white turbidity due to irregular reflection of light can be prevented, and the surface layer becomes substantially transparent. Furthermore, when the film thickness of the surface layer is 0.2 μm or less, color development of the surface layer due to light interference can be prevented, which is more preferable. Also, the thinner the surface layer, the better the transparency. Furthermore, if the thickness of the surface layer is reduced, the wear resistance of the surface layer is also improved.
[0023]
The water-repellent silicone layer 5 having a large number of openings and containing a substance 6 for preventing hydrophilicity by photoexcitation is a precursor for silicone to a substance for preventing hydrophilization by photoexcitation of a photocatalyst such as cobalt or a cobalt compound. Catalysts that promote hydrolysis of solvents such as water, ethanol, propanol, etc., silicone precursors such as hydrochloric acid, nitric acid, sulfuric acid, acetic acid, maleic acid, basic compounds such as tributylamine and hexylamine, aluminum triisopropoxide Using a coating composition to which a catalyst for curing a silicone precursor such as an acidic compound such as tetraisopropyl titanate or a surfactant for improving the dispersibility of a coating liquid such as a silane coupling agent is added, for example, silk screen Printing method, coating after masking the part corresponding to the opening How, or can be formed by forming a porous shaped opening drilled to the depth of the entire coated Kobachi aqueous silicone layer. Curing of the coating layer can be performed by heat treatment or the like.
[0024]
Here, as a precursor of silicone, an average composition formula R _p SiX _q O _{(4-pq) / 2}
(In the formula, R is a functional group composed of one or more monovalent organic groups, or a functional group composed of two or more selected from monovalent organic groups and hydroxyl groups, X is an alkoxy group, Or a halogen atom and p and q are numbers satisfying 0 <p <2, 0 <q <4), or a film-forming element made of siloxane represented by the general formula R _p SiX _4-q
(In the formula, R is a functional group composed of one or more monovalent organic groups, or a functional group composed of two or more selected from monovalent organic groups and hydroxyl groups, and p is 1 or 2) can be suitably used.
[0025]
FIG. 2 shows a second embodiment.
A hydrophilic layer formed by photoexcitation of a photocatalyst having a printing layer 7 and a printing protective layer 8 laminated on a substrate 1, a corrosion-resistant resin layer 3 including photocatalyst particles 2 provided thereon, and a large number of openings 4 formed thereon. A water-repellent silicone layer 5 containing a substance 6 for preventing the formation is provided. The photocatalyst particles 2 are dispersed so as to be partially exposed on the surface of the corrosion-resistant resin layer 3.
[0026]
The printing protective layer 8 that covers the printing layer 7 is provided to prevent the photocatalytic element in the corrosion-resistant resin layer 3 from affecting the printing layer. As the constituent material, acrylic resin, silicone resin, nylon resin, A polyester resin or the like can be applied.
[0027]
By providing the printing layer 7, not only can the beauty be imparted, but the opening of the water-repellent silicone layer provided in a porous shape can be made inconspicuous.
[0028]
The substrate 1, the photocatalyst particles 2, the corrosion-resistant resin layer 3, the water repellent silicone layer 5, and the substance 6 for preventing the photocatalyst from being hydrophilized by photoexcitation are as described in the description of the first embodiment.
[0029]
The photocatalyst particles 2 dispersed in the corrosion-resistant resin layer 3 react with ethanol or the like contained in the corrosion-resistant resin layer 3 when exposed to light such as sunlight, or react with rainwater to produce an acidic substance. The acidic substance flows out to the surface of the exterior material, that is, the surface of the water-repellent silicone layer 5, and cleans the surface of the exterior material by decomposing dirt components on the surface of the exterior material.
Moreover, since moderate water repellency is maintained by the surface of the water-repellent silicone layer, a surface of the exterior material that is hardly soiled is formed.
[0030]
The exterior material of the second embodiment is a surface that is applied with a transparent adhesive on the back surface of the base material, and is adhered to the outer wall of a house, a building, etc., so that the printed layer gives an aesthetic appearance and is not permanently soiled. The wall surface which has can be comprised.
[0031]
FIG. 3 shows a third embodiment of the exterior material of the present invention.
A transparent water-repellent silicone layer 5 containing photocatalyst particles 2 and a substance 6 for preventing hydrophilicity of the water-repellent silicone due to photoexcitation of the photocatalyst is formed on the surface of the substrate 1, A part of the photocatalyst particles 2 is exposed on the surface of the layer 5.
[0032]
In the third embodiment, the substrate 1, the photocatalyst particles 2, the corrosion-resistant resin layer 3, the water-repellent silicone layer 5, and the substance 6 for preventing the photocatalyst from being hydrophilized by photoexcitation are described in the description of the first embodiment. As explained in.
[0033]
In the third embodiment, the water-repellent silicone layer 5 containing the photocatalyst particles 2 and a substance for preventing the photocatalyst from being hydrophilized by photoexcitation prevents photocatalyst particles, photocatalyst such as cobalt or a cobalt compound from being hydrophilized by photoexcitation. In addition to this, it contains silicone precursors, water, ethanol, propanol and other solvents, hydrochloric acid, nitric acid, acetic acid, maleic acid and other silicone precursors to promote hydrolysis, triptylamine, etc. Surfactants that improve the dispersibility of coating liquids such as silane coupling agents and catalysts that cure silicone precursors such as acidic compounds such as aluminum triisopropoxide and tetrasiisopropyl titanate A coating solution made by adding a soot or the like is spray coated, dip coated. Grayed method, a flow coating method, spin coating, roll coating, brush coating, by a method sponge coating, etc., can be formed by coating on the substrate. The coating layer can be cured by heat treatment, standing at room temperature, ultraviolet irradiation, or the like.
[0034]
In the third embodiment, the photocatalyst particles 2 dispersed in the water repellent silicone layer 5 react with ethanol or the like contained in the corrosion-resistant resin layer or are exposed on the surface of the layer when exposed to light such as sunlight. The particles 2 react with rainwater to produce an acidic substance, and this acidic substance flows out to the surface of the exterior material, that is, the surface of the water-repellent silicone layer 5, and decomposes the dirt component on the surface of the exterior material to decompose the surface of the exterior material. To clean. Moreover, since moderate water repellency is maintained by the surface of the water-repellent silicone layer, a surface of the exterior material that is hardly soiled is formed.
[0035]
The exterior material of a 3rd embodiment can comprise the wall surface which has the surface which is hard to get dirty permanently by apply | coating a transparent adhesive material to the back surface of a base material, and sticking it on outer walls, such as a house and a building.
[0036]
FIG. 4 shows a fourth embodiment of the exterior material of the present invention.
This embodiment has the same configuration as that of the third embodiment except that the printing layer 7 and the printing protective layer 8 are laminated between the substrate 1 and the water repellent silicone layer 5.
[0037]
In the fourth embodiment, the substrate 1, the photocatalyst particles 2, the corrosion-resistant resin layer 3, the water-repellent silicone layer 5, and the substance 6 for preventing hydrophilicity of the photocatalyst by photoexcitation are described in the description of the third embodiment. As explained in. The print protective layer 8 is as described in the second embodiment.
[0038]
The photocatalyst particles 2 dispersed in the water-repellent silicone layer 5 react with ethanol or the like contained in the water-repellent silicone layer 5 when exposed to light such as sunlight, or react with rainwater or the like to form an acidic substance. This acidic substance flows out to the surface of the exterior material, that is, the surface of the water-repellent silicone layer 5, and decomposes the dirt component adhering to the surface to clean the surface of the exterior material. Moreover, since moderate water repellency is maintained by the surface of the water-repellent silicone layer, a surface of the exterior material that is hardly soiled is formed.
[0039]
The exterior material of the fourth embodiment is a surface that is applied with a transparent adhesive on the back surface of the base material, and is adhered to the outer wall of a house, building, etc., so that the printed layer has a beautiful appearance and is not easily soiled permanently. The wall surface which has can be comprised.
[0040]
【The invention's effect】
As described above in detail, according to the present invention, in the exterior material of claim 1, the surface is made of a water-repellent silicone layer having a large number of openings, and the photocatalyst exposed from the openings is rained. or produce acidic substance when the sunlight after the watering is applied, dirt component resulting acidic substance is attached to the surface of this, soil components of smoke such as in particular suspended in the combustion products and the air, such as the exhaust gas It works to break down the surface of the exterior material.
[0041]
Therefore, it can be attached to the outer wall of a building, etc., and the dirt attached to the outer wall due to combustion products such as exhaust gas and soot and soot floating in the atmosphere can be easily obtained by spraying the water after spraying water on the wall or hitting rainwater. Can be excluded. Moreover, since moderate water repellency is maintained by the surface of the water repellent silicone layer, it is possible to form a wall surface that is not easily soiled.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a second embodiment of the present invention.
FIG. 3 is a cross-sectional view showing a third embodiment of the present invention.
FIG. 4 is a cross-sectional view showing a fourth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base material 2 Photocatalyst particle 3 Corrosion-resistant resin layer 4 Opening part 5 Water-repellent silicone layer 6 Substance for preventing hydrophilicity by photoexcitation of photocatalyst 7 Print layer 8 Print protection layer

Claims (4)

Print layer and the print protecting layer on the substrate surface is laminated, its comprise dispersed photocatalyst particles onto, partially transparent corrosion-resistant resin layer exposed is provided on the surface of the photocatalyst particles, on which be provided with transparency water repellency silicone layer, wherein the water-repellent silicone layer with include substances that prevent the hydrophilic by photoexcitation, a number of openings through the water-repellent silicone layer is formed, the opening The exterior material, wherein the photocatalyst particles contained in the transparent corrosion-resistant resin layer are exposed . The exterior material according to claim 1, wherein the opening is formed in a porous shape . The exterior material according to claim 1 , wherein the opening is formed in a joint shape . The packaging material according to any one of claims 1 to 3, wherein the substance that prevents hydrophilization by photoexcitation is cobalt or a cobalt compound .

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