JP2006291656A - Coating method for exterior wall of building, coating material, and exterior wall structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means for preventing or suppressing an exterior wall of a building from becoming dirty and removing its dirt easily even when the exterior wall becomes dirty. <P>SOLUTION: The liquid-like or slurry-like coating material containing stratified silicate minerals, titanium oxide, silver ion and/or copper ion is sprayed or applied on a surface of the exterior wall 1 of the building. After that, the coating material is naturally dried to form a thin and substantially transparent coating layer 2. When dirt on the exterior wall 1 becomes conspicuous, the coating layer 2 is removed by washing by water to remove various dirt completely. After this, the liquid-like or slurry-like coating material is sprayed or applied on the surface of the exterior wall 1 of the building again to form a new coating layer 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a coating method and coating material for an outer wall of a building, and an outer wall structure of a building using the coating material.

  Generally, the outer wall of a building is exposed to the outside world, so it is naturally soiled by pollutants in the atmosphere, for example, chemical substances emitted from chemical factories and soot (black smoke) emitted from diesel vehicles. Yuki may be artificially soiled by graffiti. Such dirt cannot often be removed by washing. In this case, in order to restore the aesthetic appearance, renovation work such as repainting that requires considerable cost must be performed on the outer wall.

Therefore, an outer wall structure was proposed in which a coating film of inorganic paint with titanium oxide added was formed on the outer wall surface of the building, and the dirt attached to the outer wall was decomposed by the active oxygen generated by the photocatalytic function of titanium oxide. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 10-238063 (paragraph [0022], FIG. 1)

  However, with such a conventional outer wall structure, dirt on the outer wall that cannot be removed by washing cannot be sufficiently decomposed, and even if the frequency is reduced, renovation work such as repainting must still be performed on the outer wall. There is a problem.

  The present invention has been made to solve the above-described conventional problems, and can prevent or suppress the outer wall of a building from becoming dirty, and even when the outer wall is dirty, the dirt can be easily removed. It is an object to be solved to provide a means for enabling this.

  In order to solve the above-mentioned problems, a coating method for an outer wall of a building according to the present invention includes a layered silicate mineral (for example, swellable clay mineral, saponite, hectorite, bentonite, montmorillonite, smectite) on the surface of the outer wall of the building. Spraying or applying a liquid or slurry-like coating material containing, vermiculite, mica-based layered silicate mineral, kaolin-based layered silicate mineral, talc-based layered silicate mineral, etc., followed by drying (for example, natural drying) Forming a thin (substantially transparent) coating layer. Here, the coating material preferably contains a substance exhibiting a photocatalytic action (for example, titanium oxide).

  In the outer wall coating method according to the present invention, the coating material preferably contains silver ions and / or copper ions. The coating material may contain silica. In addition, layered silicate minerals, photocatalytic substances, substances containing copper ions or silver ions, or one or more of the main components (including all types) such as silica are nano-sized by the same body friction grinding (nanotechnology). Are preferably used. The surface portion of the outer wall is made of, for example, concrete, mortar, brick, tile, siding (ceramic siding, metal siding, wood siding, etc.), lightweight cellular concrete panel (ALC panel), or the like.

  The coating material for the outer wall of a building according to the present invention is a layered silicate mineral (for example, swellable clay mineral, saponite, hectorite, bentonite, montmorite, smectite, vermiculite, mica-based layered silicate mineral, kaolin-based layered silicate Minerals or talc-based layered silicate minerals). Here, the coating material preferably contains a substance exhibiting a photocatalytic action (for example, titanium oxide). The coating material preferably contains silver ions and / or copper ions, and may contain silica. In addition, it is preferable that the layered silicate mineral, the substance exhibiting a photocatalytic action, the substance containing copper ions or silver ions, or one or more kinds of main components such as silica are nanonized by the same body friction grinding.

  The outer wall structure of the building according to the present invention is a layered silicate mineral (for example, swellable clay mineral, saponite, hectorite, bentonite, montmorillonite, smectite, vermiculite, mica-based layered silicate mineral, kaolin-based layered silicate mineral or A coating layer (thin and substantially transparent) containing a talc-based layered silicate mineral or the like is formed on the surface of the outer wall. Here, the coating layer preferably contains a substance exhibiting a photocatalytic action (for example, titanium oxide). The coating layer preferably contains silver ions and / or copper ions, and may contain silica. The layered silicate mineral, the substance exhibiting a photocatalytic action, the substance containing copper ions or silver ions, or one or more kinds of main components such as silica are preferably nanonized by the same body friction grinding. Note that the surface portion of the outer wall is formed of, for example, concrete, mortar, brick, tile, siding, or an ALC panel.

  According to the coating method or the coating material or the outer wall structure of the outer wall of the building according to the present invention, the outer wall of the building can be prevented or suppressed, and even when the outer wall is dirty, the dirt is easily removed. be able to.

Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings.
FIG. 1 is an elevational sectional view showing an outer wall structure of a building according to the present invention. As shown in FIG. 1, in this outer wall structure, a thin and substantially transparent coating layer 2 including a layered silicate mineral and a substance exhibiting a photocatalytic action is formed on the surface of the outer wall 1.

  The coating layer 2 is formed by the following procedure or method. That is, first, a coating material is sprayed on the entire surface of the outer wall 1 of a building using a spray gun or the like, or a coating material is applied using a roller, a brush, a spatula, a trowel or the like.

  Here, the building is not particularly limited, and may be any one such as a detached house, an apartment house (a condominium, etc.), a building, and the like. The outer wall 1 is not particularly limited. For example, the outer wall 1 may be formed of concrete, mortar, or brick, and a tile, siding, or ALC panel may be attached to the surface thereof. In addition, the surface of the outer wall 1 may be subjected to various coloring and design having design properties. The outer wall 1 may have a smooth surface with a flat surface or a curved surface, or may have irregularities (embosses) formed on the surface.

  The coating material is basically a layered silicate mineral (for example, swellable clay mineral, saponite, hectorite, bentonite, montmorite, smectite, vermiculite, mica-based layered silicate mineral, kaolin-based layered silicate mineral, or talc-based material. Layered silicate mineral, etc.), titanium oxide, which is one of the photocatalytic substances, and water in a liquid or slurry (or paste) form. Depending on the case, silver ions and / or copper ions, silica or the like may be added. Titanium oxide and layered silicate minerals are nano-sized by homogenous friction grinding (nanotechnology). When silver ions and / or copper ions, silica, or the like is added, those that are nano-sized by the same body friction grinding are also used.

Since this coating material is composed of an inorganic substance and water, it is odorless. Moreover, since it is not flammable, it is extremely safe. Spraying amount or coating amount of the coating material is preferably from 140~160g / ^{m 2,} more preferably about 150 g / ^{m 2.} Even if there is considerable unevenness in spraying or application of the coating material, the coating layer 2 formed from the coating material is substantially transparent, and thus this unevenness is completely unknown after drying. Therefore, anyone who is not a skilled person can easily perform this operation in a short time.

  The coating material sprayed or applied to the surface of the outer wall 1 in this way is dried by natural drying. In addition, since the water in a coating material only vaporizes at the time of drying, the substance which has a bad influence on an environment is not discharge | released from a coating material at all. Thereby, the coating layer 2 is formed on the surface of the outer wall 1. Since the coating layer 2 does not attract (suck) dust, does not change color, and is not easily contaminated, the coating layer 2 maintains the appearance or design of the outer wall 1 for a long period of time. The coating layer 2 is harmless to the human body and is safe even if touched by an infant or infant.

  Since this coating layer 2 is very thin, it is substantially transparent, and reflects the aesthetics or design of the outer wall 1 as it is. In addition, the shape or properties of the coating layer 2 (clay film) mainly composed of layered silicate mineral and titanium oxide does not change over time. Further, even if the crayon or magic ink or the like is used for the graffiti, the coating layer 2 is a clay structure having a laminated structure (a structure in which a plurality of clay layers that are very thin and easy to peel off). On top of that, it's easy to slip and the graffiti is never written deeply. In the case of the outer wall 1 having an emboss formed on the surface, a fine clay-like coating layer 2 enters the emboss and prevents dirt from entering the emboss.

Titanium oxide (TiO ₂ ) contained in the coating layer 2 is a metal oxide semiconductor and has a photocatalytic action. For this reason, titanium oxide decomposes the fine dirt adhering to the coating layer 2 or the outer wall 1 by its photocatalytic action, and this also suppresses the deterioration of the aesthetic appearance or design of the outer wall 1.

  Thereafter, the outer wall 1 is gradually soiled as time passes, but when the dirt becomes conspicuous, the outer wall 1 is washed. This washing can be easily performed by, for example, water washing using a high-pressure washing machine or water washing using a brush. In addition, water washing can be performed only with water or using a conventional ordinary detergent as required. As described above, the coating layer 2 is formed on the surface of the outer wall 1, but most of various kinds of dirt adhere to the surface of the coating layer 2 or only penetrate into the coating layer 2. Almost no adhesion to the outer wall 1. That is, the coating layer 2 protects the outer wall 1 from dirt.

  On the other hand, since the coating layer 2 is mainly composed of a layered silicate mineral, the coating layer 2 can be easily removed by washing with water. For this reason, by removing the coating layer 2 by simple water washing or water washing using an ordinary detergent, various stains adhering to the coating layer 2 or the outer wall 1, such as chemical substances discharged from a chemical factory, Dirt caused by soot discharged from diesel vehicles, graffiti using crayon or magic ink, adhesion of paints, oil stains, etc., which have been difficult to remove by conventional water washing, can be removed almost completely.

  That is, in this cleaning process, almost all dirt can be removed as long as the layered silicate mineral can be removed. Therefore, it is only necessary to focus on removing the layered silicate mineral. Therefore, this cleaning can be performed easily and in a short time by a simple cleaning technique, even if it is not an expert. Thus, the outer wall 1 is almost completely restored to its original aesthetic appearance or design by washing. Since the coating layer 2 can be removed by simple wiping, the dirt may be removed by wiping instead of cleaning.

  After the outer wall 1 is washed in this manner to remove the old coating layer 2, the coating material is sprayed or applied again to the surface of the outer wall 1 and dried to form a new coating layer 2. The method for forming the coating layer 2 is as described above. After that, when the outer wall 1 becomes dirty, the procedure of cleaning the outer wall 1 to form the coating layer 2 is repeated. As described above, the aesthetics or design of the outer wall 1 is almost completely restored by the cleaning, so that the aesthetics or the design is maintained even if the cleaning of the outer wall 1 and the formation of the coating layer 2 are repeated a considerable number of times. be able to. For this reason, almost no regeneration work such as repainting of the outer wall 1 is required.

  In the coating material for the outer wall according to the present invention, the main component is nano-sized by the same body friction grinding (nanotechnology), but this makes it possible to reduce the amount of the material and to make all the materials very small ( Can be coated with a tiny indentation. Moreover, the photocatalytic effect of titanium oxide can be exhibited effectively even with a small amount of light.

  In this embodiment, the coating material or the coating layer 2 includes a substance exhibiting a photocatalytic action such as titanium oxide, but a coating material not including a substance exhibiting a photocatalytic action may be used. Also in this case, various stains adhering to the coating layer 2 or the outer wall 1 can be almost completely removed by washing. In this embodiment, the layered silicate mineral is used, but other clays may be used.

It is an elevational sectional view showing the outer wall structure of the building concerning the present invention.

Explanation of symbols

1 outer wall 2 coating layer

Claims (26)

  A building outer wall characterized by spraying or applying a liquid or slurry coating material containing a layered silicate mineral on the surface of the outer wall of the building, and then drying to form a coating layer on the surface of the outer wall. Coating method.   The method for coating an outer wall of a building according to claim 1, wherein the coating material includes a substance exhibiting a photocatalytic action.   The method for coating an outer wall of a building according to claim 2, wherein the substance exhibiting a photocatalytic action is titanium oxide.   The method for coating an outer wall of a building according to any one of claims 1 to 3, wherein the layered silicate mineral and / or the substance exhibiting the photocatalytic action is used after being nanosized by homogenous friction grinding.   The method for coating an outer wall of a building according to any one of claims 1 to 4, wherein the layered silicate mineral is a swellable clay mineral.   The layered silicate mineral is saponite, hectorite, bentonite, montmorite, smectite, vermiculite, mica-based layered silicate mineral, kaolin-based layered silicate mineral, or talc-based layered silicate mineral, The coating method of the outer wall of the building as described in any one of 1-4.   The said coating material contains silver ion and / or copper ion, The coating method of the outer wall of the building as described in any one of Claims 1-6 characterized by the above-mentioned.   The method of coating an outer wall of a building according to claim 7, wherein the coating material contains silica.   The coating of the outer wall of a building according to any one of claims 1 to 8, wherein the surface portion of the outer wall is formed of concrete, mortar, brick, tile, siding or lightweight cellular concrete panel. Method.   A coating material for an outer wall of a building, comprising a layered silicate mineral.   The coating material for an outer wall of a building according to claim 10, comprising a substance exhibiting a photocatalytic action.   The coating material for an outer wall of a building according to claim 11, wherein the substance exhibiting a photocatalytic action is titanium oxide.   The layered silicate mineral and / or the substance exhibiting the photocatalytic action is nano-sized by the same body friction grinding, The outer wall of the building according to any one of claims 10 to 12, Coating material.   The coating material for an outer wall of a building according to any one of claims 10 to 13, wherein the layered silicate mineral is a swellable clay mineral.   The layered silicate mineral is saponite, hectorite, bentonite, montmorite, smectite, vermiculite, mica-based layered silicate mineral, kaolin-based layered silicate mineral, or talc-based layered silicate mineral, The coating material of the outer wall of the building as described in any one of 10-13.   The coating material for an outer wall of a building according to any one of claims 10 to 15, wherein the coating material contains silver ions and / or copper ions.   The coating material for an outer wall of a building according to claim 16, comprising silica.   An outer wall structure of a building, wherein a coating layer containing a layered silicate mineral is formed on the surface of the outer wall.   [19] The outer wall structure of a building according to claim 18, wherein the coating layer includes a substance exhibiting a photocatalytic action.   20. The building outer wall structure according to claim 19, wherein the photocatalytic substance is titanium oxide.   The outer wall structure of a building according to any one of claims 18 to 20, wherein the layered silicate mineral and / or the substance exhibiting a photocatalytic action is nano-sized by homogenous friction grinding. .   The building outer wall structure according to any one of claims 18 to 21, wherein the layered silicate mineral is a swellable clay mineral.   The layered silicate mineral is saponite, hectorite, bentonite, montmorite, smectite, vermiculite, mica-based layered silicate mineral, kaolin-based layered silicate mineral, or talc-based layered silicate mineral, The outer wall structure of a building according to any one of 18 to 21.   The building outer wall structure according to any one of claims 18 to 23, wherein the coating layer contains silver ions and / or copper ions.   The building outer wall structure according to claim 24, wherein the coating layer includes silica.   26. The outer wall structure of a building according to any one of claims 18 to 25, wherein a surface portion of the outer wall is formed of concrete, mortar, brick, tile, siding, or a lightweight cellular concrete panel.

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