JP2013002080A - Decorative wall surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve aesthetics of an existing wall surface configured by a plurality of plate-like wall materials having an uneven pattern, and to suppress deterioration caused by temperature rise.SOLUTION: An inventive decorative wall surface is the decorative wall surface in which a decorative coat is provided against an age-deteriorated existing wall surface. The existing wall surface is configured by a plurality of plate-like wall materials having an uneven pattern. On the surface of the wall surface, a colored coat (A) containing an infrared reflective powder is provided as the decorative coat. On the colored coat (A), a transparent coat (B) containing silica having an average primary particle diameter of 1-200 nm is provided.

Description

  The present invention relates to a decorative wall surface in a building.

  Conventionally, various plate-like wall materials are used for the wall surface of a building. As such a plate-like wall material, many are used which are provided with a concavo-convex pattern on the surface thereof to give a three-dimensional effect and are further coated (for example, JP-A-7-275789 and JP-A-2001). No. 227130).

  However, since the wall surface comprised of such a plate-like wall material is exposed to the outdoors for a long period of time, it must be repainted after a predetermined period. By such repainting, the aesthetics of the plate-like wall material surface can be recovered. However, when repainting with a general covering material, contamination may occur again due to the influence of rain, dust, etc., and the aesthetics of the corner may be impaired. In the part where such contamination occurs, the degree of absorption of sunlight increases and temperature rise is likely to occur.

  In a plate-like wall material having a concavo-convex pattern, the contamination as described above tends to be remarkable particularly in the vicinity of the concave portion. That is, in the vicinity of the concave portion of the plate-like wall material, the temperature rises easily with a decrease in aesthetics. Such a temperature rise may promote deterioration of the coating.

JP-A-7-275789 JP 2001-227130 A

  The present invention has been made in view of the above-described problems, and enhances the aesthetics of an existing wall surface constituted by a plurality of plate-like wall materials having a concavo-convex pattern, and further deteriorates due to a temperature rise. The purpose is to suppress.

  As a result of intensive studies to achieve the above object, the present inventor has conceived that a specific colored coating (A) and a transparent coating (B) are provided on the existing wall surface as described above, and the present invention is achieved. It came to complete.

That is, the present invention has the following characteristics.
1. It is a decorative wall surface with a coating on the existing wall surface that has deteriorated over time,
The existing wall surface is constituted by a plurality of plate-like wall materials having an uneven pattern,
As the cosmetic coating,
The surface of the existing wall surface is provided with a colored coating (A) containing infrared reflective powder,
A decorative wall surface comprising a transparent coating (B) containing silica having an average primary particle diameter of 1 to 200 nm on the colored coating (A).
2. In the existing wall surface, a sealing material is filled in a connecting portion between the plate-like wall materials. The decorative wall surface described.
3. A colored film (A ′) that is different in color from the colored film (A) and includes an infrared reflective powder and / or an infrared transmissive powder with respect to a partial region on the colored film (A). Provided,
The transparent coating (B) is provided on the colored coating (A ′). Or 2. The decorative wall surface described.
4). The colored coating (A) is a mixture of infrared reflective powder and aminosilane in an acrylic polymer matrix. ~ 3. The decorative wall surface according to any one of the above.
5. The colored coating (A) is a mixture of infrared reflective powder, aminosilane, and dimethylsiloxane in an acrylic polymer matrix. ~ 3. The decorative wall surface according to any one of the above.

  Above 1. The invention which concerns on is comprised by the some plate-shaped wall material which has an uneven | corrugated pattern, and can be applied to the existing wall surface which aged. Above 1. According to the invention which concerns, the aesthetics of such an existing wall surface can be improved, and also the deterioration resulting from a temperature rise can be suppressed.

2. In the invention according to the above, the existing wall surface is one in which a sealing material is filled in the connecting portion between the plate-like wall materials.
When a sealing material is provided at the connecting portion between the plate-like wall materials and the sealing material is exposed, contamination of the connecting portion is likely to proceed. Such contamination causes a temperature increase due to sunlight absorption, and may promote deterioration of the connecting portion.
2. In the invention according to, by providing the colored coating (A) and the transparent coating (B) on such an existing wall surface, the aesthetics of the entire wall surface including the connecting portion is increased, and further deterioration due to a temperature rise. Can also be suppressed.

3. above. In the invention according to the present invention, a colored film that is different in color from the colored film (A) with respect to a part of the region on the colored film (A) and includes an infrared reflecting powder and / or an infrared transmitting powder. (A ′) is provided, and the transparent coating (B) is provided on the colored coating (A ′).
3. above. In the invention according to the present invention, a desired appearance finish having two or more colored regions can be obtained by laminating such films, and the design of the existing wall surface can be reproduced.

4. above. In the invention according to the invention, as the colored coating (A), an acrylic polymer matrix in which infrared reflective powder and aminosilane are mixed is used.
In the concave or convex portions of the plate-like wall material, the manner of sunlight and the flow of rainfall are different. In particular, when the concave portion and the convex portion are colored with different colors, the tendency tends to be remarkable. Furthermore, when the sealing part is filled in the connection part between plate-shaped wall materials, the surface state of a plate-shaped wall material and a connection part will also differ greatly.
4. above. According to the invention according to the present invention, even when the surface state of the existing wall surface is different as described above, sufficient adhesion can be ensured at each portion, and occurrence of defects such as peeling of the coating and swelling can be suppressed. .

5. above. In the invention according to the invention, as the colored coating (A), an acrylic polymer matrix in which infrared reflective powder, aminosilane, and dimethylsiloxane are mixed is used.
5. above. In the invention which concerns, by employ | adopting such a colored film (A), the crack generation of a film is fully suppressed and the adhesiveness to each site | part is further improved. In particular, when a sealing material is filled in the connecting portion between the plate-like wall materials, sufficient adhesion to both the plate-like wall material and the sealing material is ensured, while further following the displacement of the sealing material, The ability to alleviate displacement is also imparted.

It is sectional drawing which shows an example of this invention decorative wall surface. It is sectional drawing which shows another example of this invention decorative wall surface. It is sectional drawing which shows another example of this invention decorative wall surface.

Hereinafter, modes for carrying out the present invention will be described.
FIG. 1 is a cross-sectional view showing an example of the decorative wall surface of the present invention.

  The existing wall surface 1 of the present invention is composed of a plurality of plate-like wall materials 2. Examples of the plate-like wall material 2 include cement board, extrusion-molded board, slate board, PC board, ALC board, fiber reinforced cement board, metal siding board, ceramic siding board, ceramic board, calcium silicate board, and gypsum board. , Plastic board, hard wood cement board, PVC extrusion siding board, plywood and the like.

In this invention, what has an uneven | corrugated pattern as the plate-shaped wall material 2 is made into object.
Examples of the concavo-convex pattern in the plate-like wall material 2 include various patterns. For example, in addition to tile-like patterns, brick-like patterns, geometric patterns, striped patterns, lattice patterns, polka dots, etc., animals and plants have been designed. Examples include graphic patterns. Specifically, examples of the shape of the convex portion when the concavo-convex pattern is viewed from the front include shapes such as a square, a rectangle, a circle, an ellipse, a triangle, a rhombus, a polygon, and an indefinite shape. Moreover, as a cross-sectional shape of the convex part in an uneven | corrugated pattern, a trapezoid, square, a rectangle, a semicircle, a waveform, a staircase shape, a triangle, a mountain shape etc. are mentioned, for example. The recesses in the concavo-convex pattern are usually flat and preferably form joints. The height difference between the concave portion and the convex portion may be constant or different in each convex portion, but is preferably 20 mm or less, more preferably about 1 to 15 mm.

In the present invention, the plate-like wall material 2 having two or more colored regions and having an uneven pattern can be targeted. Such a plate-like wall material 2 has two or more different color plate-like wall materials 3 on the surface thereof. The color of each colored region is not particularly limited, but the present invention can provide a particularly advantageous effect when colored regions having greatly different brightness, saturation, hue, and the like are mixed. Specific examples of such a plate-like wall material 2 include a mixture of colored regions having a color difference (ΔE) of 5 or more (more preferably 10 or more). In FIG. 1, colored areas 31 and colored areas 32 of different colors are mixed.
In the present invention, particularly advantageous effects can be obtained when the plate-like wall material 2 in which the concave portion and the convex portion are colored with different colors is used as a target.

When the plate-like wall material 2 has a concavo-convex pattern and two or more colored areas, a difference occurs in the degree of absorption of sunlight in each colored area, and a temperature rise occurs in a portion where the degree of absorption is large. It becomes easy. In particular, when a colored region that easily absorbs sunlight is formed in the vicinity of the concave portion, there is a possibility that the increase in temperature may be promoted by overlapping with the sunlight absorbing action by the pollutant.
The present invention effectively works to improve such problems in the existing wall surface.

  The present invention can be applied as a retrofit specification when the existing wall surface 1 constituted by the plate-like wall material 2 as described above has deteriorated over time. The degree of aging deterioration is not particularly limited, but those used as wall surfaces for about 5 years or more (more preferably 8 years or more) can be the subject of the present invention.

In the present invention, the existing wall surface 1 can be the one in which the connecting portion between the plate-like wall materials 2 is filled with a sealing material or a dry joint material. In this case, the plurality of plate-like wall materials 2 are provided side by side through a connecting portion, and a connecting portion is provided between the plate-like wall materials 2. The width of the connecting portion is preferably about 3 to 20 mm (more preferably 5 to 15 mm). The connecting portion is filled with a sealing material or a dry joint material.
The present invention provides an advantageous effect when the existing wall surface 1 is one in which the sealing material 4 is filled in the connecting portion between the plate-like wall materials 2 (FIG. 2).
The sealing material 4 may be one that has deteriorated over time in the same manner as the plate-like wall material 2, or may be newly placed before the colored coating (A) is formed. In the present invention, when the sealing material 4 is newly placed, a particularly excellent effect can be exhibited.

A general material can be used as the sealing material 4, for example, a silicone-based sealing material, a modified silicone-based sealing material, a polysulfide-based sealing material, a modified polysulfide-based sealing material, an acrylic urethane-based sealing material, a polyurethane-based sealing material, Examples thereof include SBR-based sealing materials and butyl rubber-based sealing materials.
The method for filling the sealing material 4 is not particularly limited, and for example, a known method using a gun or a spatula can be employed.

In the present invention, particularly when a modified silicone sealant is used as the sealant 4, an excellent effect can be obtained.
The modified silicone sealant is a sealant containing a modified silicone resin. This modified silicone resin has an organic resin as the main chain and has at least one reactive silyl group at the terminal or side chain. Examples of the organic resin constituting the main chain of the modified silicone resin include a polyether polymer, a polyester polymer, an ether / ester block copolymer, an ethylenically unsaturated compound polymer, and a diene compound polymer. Examples of the reactive silyl group include an alkoxysilyl group and a silanol group.

The polyether polymer in the modified silicone resin has an alkylene oxide repeating unit. Examples of the alkylene oxide include ethylene oxide and propylene oxide.
The polyester polymer has an ester of a carboxyl group-containing compound as a repeating unit. Examples of the carboxyl group-containing compound include acetic acid, propionic acid, maleic acid, phthalic acid, citric acid, pyruvic acid, and lactic acid.
The ether / ester block copolymer has both the repeating unit of the polyether polymer and the repeating unit of the polyester polymer.
The ethylenically unsaturated compound polymer contains an ethylenically unsaturated compound as a monomer component. Examples of the ethylenically unsaturated compound include ethylene, propylene, isobutene, (meth) acrylic acid ester, styrene, vinyl acetate and the like. Specific examples of the ethylenically unsaturated compound polymer include, for example, an ethylene-propylene copolymer, an ethylene-vinyl acetate copolymer, an ethylene-acrylic acid ester copolymer, a polyisobutylene, a polyacrylic acid ester, and a polymethacrylic acid. Examples include esters.
The diene compound polymer has a diene compound as a monomer component. Examples of the diene compound include butadiene, chloroprene, isoprene and the like. Specific examples of the diene compound polymer include, for example, polybutadiene, styrene-butadiene copolymer, acrylonitrile-butadiene copolymer, ethylene-butadiene copolymer, polyisoprene, styrene-isoprene copolymer, isobutylene-isoprene copolymer. Examples of the polymer include polychloroprene, styrene-chloroprene copolymer, and acrylonitrile-chloroprene copolymer.

In the present invention, even when a non-bleed type material is used as the sealing material 4, excellent effects can be obtained. The non-bleed type sealing material referred to here is one having a plasticizer content of 5% by weight or less (preferably not containing a plasticizer) in the sealing material. Examples of the plasticizer include phthalic acid esters such as dibutyl phthalate, diheptyl phthalate, dioctyl phthalate, and di (2-ethylhexyl) phthalate; aliphatic dibasic acid esters such as dioctyl adipate and dioctyl sebacate; Examples thereof include phosphoric esters such as zircyl phosphate and tributyl phosphate, and halogenated aliphatic compounds such as chlorinated paraffin. The molecular weight of these plasticizers is usually less than 500.
Examples of the non-bleed type sealing material include an acrylic urethane sealing material, a polyurethane sealing material, and a modified silicone sealing material that satisfy the above conditions. In the present invention, when a non-bleed type modified silicone sealant is used, a particularly excellent effect can be obtained.

  Before the sealing material 4 is filled, treatments such as backup material filling and primer coating may be performed in advance. As the backup material, for example, a foamed polyethylene-based backup material can be used. As the primer, for example, a synthetic rubber primer, an acrylic primer, a urethane primer, an epoxy primer, a silicone resin primer, a silane primer, or the like can be used.

In the present invention, on the surface of the existing wall surface 1, as a decorative coating, a colored coating (A) containing infrared reflecting powder and a transparent coating (B) containing silica having an average primary particle diameter of 1 to 200 nm are provided. Such a colored coating (A) and a transparent coating (B) serve as a decorative coating for refurbishment of the existing wall surface 1 and enhance the aesthetics while utilizing the uneven pattern of the plate-like wall material 2. .
In this invention, the temperature rise by sunlight irradiation is suppressed by the infrared reflective action of a colored film (A). Furthermore, since the transparent coating (B) prevents the adhesion of the pollutant, the temperature rise caused by the sunlight absorption of the pollutant is suppressed. In the present invention, these synergistic effects can suppress the deterioration of the decorative film.

  In addition to such an action, in the present invention, an increase in the temperature of the transparent coating (B) can also be suppressed by the infrared reflecting action of the colored coating (A). If the temperature of the transparent film (B) rises excessively, the original anti-contamination action may not be exhibited due to the softening of the film, or the anti-contamination action may be impaired early due to a decrease in the durability of the film. On the other hand, in this invention, the temperature rise of a transparent film (B) is suppressed by the effect | action of the said colored film (A), and sufficient pollution prevention effect is exhibited over a long period of time. Thereby, the aesthetics based on the color etc. of a colored film (A) are maintained over a long period, and the temperature rise resulting from sunlight absorption of a pollutant can also be avoided for a long period.

  As the colored coating (A), those in which infrared reflective powder is mixed in a polymer matrix are suitable. Examples of the resin that forms the polymer matrix include acrylic resin, urethane resin, vinyl acetate resin, urethane resin, silicone resin, fluorine resin, acrylic vinyl acetate resin, acrylic urethane resin, and acrylic silicon resin. Species or two or more can be used.

  Examples of the infrared reflective powder include aluminum flake, titanium oxide, barium sulfate, zinc oxide, iron oxide, calcium carbonate, silicon oxide, magnesium oxide, zirconium oxide, yttrium oxide, indium oxide, alumina, and iron-chromium composite oxide. , Manganese bismuth composite oxide, manganese yttrium composite oxide, and the like, and one or more of these can be used. The ratio of the infrared reflecting powder is preferably 3 to 800 parts by weight, more preferably 5 to 600 parts by weight, based on 100 parts by weight of the polymer matrix, in terms of solid content.

  The colored coating (A) may further contain an infrared transmitting powder. A wide variety of color tones can be expressed by appropriately combining these infrared transmitting powders. Examples of the infrared transmitting powder include perylene pigment, azo pigment, yellow lead, petal, vermilion, titanium red, cadmium red, quinacridone red, isoindolinone, benzimidazolone, phthalocyanine green, phthalocyanine blue, cobalt blue, Induslen blue, ultramarine blue, bitumen and the like can be mentioned, and one or more of these can be used. The ratio of the infrared transmitting powder is preferably 1 to 200 parts by weight, more preferably 2 to 100 parts by weight with respect to 100 parts by weight of the polymer matrix in terms of solid content.

In the present invention, a preferred embodiment of the colored coating (A) includes a mixture of infrared reflective powder and aminosilane (hereinafter referred to as “colored coating (A1)”) in an acrylic polymer matrix.
Such a colored coating (A1) is excellent in adhesion to each region having a different surface state. For example, when the plate-like wall material 2 has different colored regions, a difference in the deterioration state is likely to occur in each colored region, which may adversely affect the adhesion, but if a colored coating (A1) is used, Adhesion to such colored regions can be sufficiently ensured. Furthermore, when the existing wall surface 1 has the sealing material 4, the colored coating (A 1) is excellent in adhesion to the sealing material 4. In the present invention, the colored film (A1) can sufficiently suppress peeling and swelling of the colored film. Moreover, in this invention, adhesiveness with the below-mentioned colored film (A ') or transparent film (B) can also be improved by use of a colored film (A1).

The acrylic polymer matrix is a resin matrix formed of an acrylic polymer. This acrylic polymer is a polymer of a monomer mixture containing at least one alkyl (meth) acrylate.
Specific examples of the (meth) acrylic acid alkyl ester include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, n-amyl ( (Meth) acrylate, isoamyl (meth) acrylate, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, octyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate, octadecyl (meth) acrylate, Examples include cyclohexyl (meth) acrylate, phenyl (meth) acrylate, and benzyl (meth) acrylate. These can be used alone or in combination of two or more.

  The constituent ratio of the (meth) acrylic acid alkyl ester in the monomer mixture is preferably 30% by weight or more, preferably 50% by weight or more, more preferably 60% by weight or more. Although an upper limit is not specifically limited, Preferably it is 99.8 weight% or less, More preferably, it is 99.5 weight% or less, More preferably, it is 99 weight% or less.

  In the acrylic polymer, a monomer copolymerizable with the above (meth) acrylic acid alkyl ester can be copolymerized. Examples of such monomers include vinyl acetate, vinyl chloride, styrene and the like, in addition to monomers having a functional group such as carboxyl group, amino group, amide group, epoxy group, carbonyl group, and hydroxyl group.

  The glass transition temperature of the acrylic polymer is preferably -20 to 80 ° C, more preferably -10 to 60 ° C. The glass transition temperature is a value obtained by the Fox calculation formula.

Aminosilane is a compound having an amino group and a reactive silyl group. Examples of the reactive silyl group include an alkoxysilyl group and a silanol group.
Examples of aminosilane include γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N- (β-aminoethyl) -γ-aminopropyltrimethoxysilane, and N- (β-aminoethyl) -γ-. Aminopropyltriethoxysilane, γ-aminopropylmethyldimethoxysilane, γ-aminopropylmethyldiethoxysilane, γ-aminopropyldimethylmethoxysilane, γ-aminopropyldimethylethoxysilane, N- (β-aminoethyl) -γ- Aminopropylmethyldimethoxysilane, N- (β-aminoethyl) -γ-aminopropylmethyldiethoxysilane, N- (6-aminohexyl) aminopropyltrimethoxysilane, N- (6-aminohexyl) aminopropyltriethoxy Silane, N- (β-amino ester ) -Γ-aminoisobutyltrimethoxysilane, N- (β-aminoethyl) -γ-aminoisobutylmethyldimethoxysilane, γ-aminopropyldiisopropyltrimethoxysilane, γ-aminopropyldiisopropyltriethoxysilane, γ-aminopropyl Methylbis (trimethylsiloxy) silane, γ-ureidopropyltrimethoxysilane, γ-ureidopropyltriethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, N-phenyl-γ-aminopropyltriethoxysilane, N- Benzyl-γ-aminopropyltrimethoxysilane, N-benzyl-γ-aminopropyltriethoxysilane, 3- (m-aminophenoxy) propyltrimethoxysilane, 3- (m-aminophenoxy) propyltriethoxysilane M-aminophenyltrimethoxysilane, m-aminophenyltriethoxysilane, p-aminophenyltrimethoxysilane, p-aminophenyltriethoxysilane, aminophenyltrimethoxysilane, aminophenyltriethoxysilane, γ-aminopropyl Tris (methoxyethoxyethoxy) silane, γ-aminopropyltris (trimethylsiloxy) silane, 2-aminoethylaminomethylbenzyloxydimethylsilane, (aminoethylaminomethyl) phenethyltrimethoxysilane, N-vinylbenzyl-γ-aminoro One or more selected from pyrtriethoxysilane and the like can be mentioned. Among these, aminosilane having two or more (preferably two) amino groups in one molecule is preferable.
The weight ratio of aminosilane is preferably 0.1 to 20 parts by weight, more preferably 0.5 to 10 parts by weight with respect to 100 parts by weight of the acrylic polymer matrix in terms of solid content.

In the present invention, as the colored coating (A), an acrylic polymer matrix in which infrared reflective powder, aminosilane and dimethylsiloxane are mixed (hereinafter referred to as “colored coating (A2)”) can be used. In this invention, it becomes possible by using the colored film (A2) containing such a component to improve the adhesiveness with each site | part of the existing wall surface 1, especially the sealing material 4. FIG. Furthermore, it is possible to provide the performance of relaxing the displacement while following the displacement of the sealing material 4. The colored coating (A2) also contributes to improving the adhesion with the later-described colored coating (A ′) or transparent coating (B).
By such an action, in the colored coating (A2), peeling of the coating, cracks, and the like can be sufficiently suppressed. In particular, when a modified silicone sealant is used as the sealant 4, an excellent effect can be obtained. Such an effect is presumed to be achieved by the synergistic action of dimethylsiloxane and aminosilane.
As the acrylic polymer and aminosilane, the same ones as described above can be used.

Dimethylsiloxane in the colored coating (A2) is synthesized using dimethyldialkoxysilane, dimethylsiloxane oligomer, or the like as a raw material. Examples of dimethyldialkoxysilane include dimethyldimethoxysilane and dimethyldiethoxysilane. Examples of the dimethylsiloxane oligomer include hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and tetradecamethylcycloheptasiloxane. The average molecular weight of dimethylsiloxane is preferably 10,000 or more, more preferably 50,000 or more.
The weight ratio of dimethylsiloxane is preferably 1 to 200 parts by weight, more preferably 5 to 100 parts by weight, based on 100 parts by weight of the acrylic polymer matrix, in terms of solid content.

  The colored coating (A) can be formed by applying and drying a coating material containing the above components. The covering material may contain various components other than the above components as long as the effects of the present invention are not significantly impaired. Examples of such components include matting agents, thickeners, film-forming aids, leveling agents, wetting agents, plasticizers, antifreezing agents, pH adjusting agents, antiseptics, antifungal agents, and antialgal agents. Antibacterial agents, dispersants, antifoaming agents, adsorbents, fibers, crosslinking agents, ultraviolet absorbers, antioxidants, catalysts and the like can be mentioned.

When the coating material is applied to the existing wall surface 1, for example, a known coating instrument such as a brush, a roller, or a spray can be used. When the sealing material 4 is newly placed on the existing wall surface 1, the covering material may be applied approximately 2 to 10 days after the sealing material 4 is placed.
In the present invention, the colored coating (A) can be formed by applying the coating material on at least the entire surface of the plate-like wall material 2. The covering material is desirably applied to the entire surface of the existing wall surface 1. The coating amount of the coating material is preferably about 10 to 300 g / m ^{2 in} terms of solid content.

  In the present invention, the colored film (A) having a different color from the colored film (A) with respect to a part of the region on the colored film (A) and containing an infrared reflecting powder and / or an infrared transmitting powder ( A ′) can be provided. By laminating such colored coatings, a desired appearance finish having two or more colored areas can be obtained. In addition, the design of the existing wall surface 1 can be reproduced.

  As the colored coating (A ′), a polymer matrix in which infrared reflecting powder and / or infrared transmitting powder is mixed is preferable. As the polymer matrix, the infrared reflecting powder, and the infrared transmitting powder, the same materials as described in the colored coating (A) can be used. As the colored coating (A ′), one containing either one or both of infrared reflecting powder and infrared transmitting powder can be used. In the present invention, as the coating material for forming the colored film (A ′), the same coating material as that for the colored film (A) can be used.

The colored coating (A ′) can be formed by applying and drying the coating material. For example, known devices such as brushes, rollers, sprays, and scissors can be used as the coating device.
What is necessary is just to apply | coat the coating material which forms a colored film (A ') to a one part area | region on a colored film (A). For example, when the existing wall surface 1 has a concavo-convex pattern, the colored coating (A ′) can be formed by applying a coating material to either the convex portion or the concave portion. The color of the colored coating (A ′) can be appropriately set in consideration of the finished appearance and the like. Moreover, what is necessary is just to set the coating amount suitably according to the material to be used.
In FIG. 3, the colored coating (A ′) is formed only on the convex portions of the concavo-convex pattern. In the embodiment of FIG. 3, when the color of the colored coating (A) is matched with the color of the colored region 31 and the color of the colored coating (A ′) is matched with the color of the colored region 32, the design of the existing wall surface 1 is reproduced. Can do.
When forming a colored film (A ′), only one type of coating material may be used, or two or more types may be used in combination. When two or more types of coating materials are used, the colored coating (A ′) can be an aspect in which coatings of two or more types of coating materials are stacked and / or provided side by side.

  The transparent coating (B) is provided on the outermost surface of the decorative coating. As the transparent coating (B) in the present invention, those in which silica having an average primary particle diameter of 1 to 200 nm is immobilized with a polymer are suitable.

Among these, silica exhibits a superior anti-contamination effect due to the high hardness of the particles themselves and the fact that they have many silanol groups on the surface of the particles.
The average primary particle diameter of silica is usually 1 to 200 nm, preferably 5 to 100 nm. Within this range, a plurality of silicas having different average primary particle sizes can be used in combination. When the average primary particle diameter of silica is larger than 200 nm, the specific surface area becomes small, and silanol groups are also reduced, so that the antifouling property becomes insufficient. When the average primary particle diameter is smaller than 1 nm, the silica itself becomes unstable, so it is not practical. The average primary particle diameter referred to here is a value measured by a light scattering method.

The silica of the transparent coating (B) is preferably derived from a silica sol, and further derived from a water-dispersible silica sol having a pH of 5.0 or more and less than 8.5 (preferably 6.0 or more and 8.0 or less). Is more preferred.
Such a neutral type water-dispersible silica sol can be produced using a silicate compound as a raw material. Examples of the silicate compound include tetramethoxysilane, tetraethoxysilane, tetra n-propoxysilane, tetraisopropoxysilane, tetra n-butoxysilane, tetraisobutoxysilane, tetra sec-butoxysilane, tetra t-butoxysilane, tetra Examples thereof include phenoxysilane and the condensates thereof. In addition, alkoxysilane compounds other than the above silicate compounds, alcohols, glycols, glycol ethers, fluorine alcohols, silane coupling agents, polyoxyalkylene group-containing compounds, and the like can also be used.

  Various resins can be used as the polymer for immobilizing the silica. Specifically, for example, acrylic resin, urethane resin, vinyl acetate resin, urethane resin, silicon resin, fluorine resin, acrylic vinyl acetate resin, acrylic urethane resin, acrylic silicon resin, and the like, one or two of these can be mentioned. The above can be used. As such a resin, a water-soluble resin and / or a water-dispersible resin is preferable.

  The solid content weight ratio (silica: polymer) of silica and polymer in the transparent coating (B) is preferably 0.5: 1 to 5: 1, more preferably 0.8: 1 to 4: 1, and even more preferably. 1: 1 to 3: 1. With such a ratio, a sufficient anti-contamination effect can be obtained, and the adhesion with the lower layer film can be enhanced, so that the effect of the present invention is stably exhibited over a long period of time.

The transparent film (B) can be formed by applying and drying a coating material containing the above components. What is necessary is just to apply | coat this coating | covering material on the whole surface on a colored film (A). As a coating instrument, well-known things, such as a brush, a roller, and a spray, can be used, for example. Coating with the amount of the coating material for forming the transparent film (B) is in terms of the solid content, preferably 0.1 to 50 g / ^{m 2,} more preferably 0.5 to 20 g / ^{m 2.}

  Examples are given below to clarify the features of the present invention.

<Test I>
(Test specimen production)
A ceramic siding boat exposed to an accelerated weathering tester was prepared as a plate-like wall material. This ceramic siding board has a tiled uneven pattern on the surface, a black acrylic coating on the recesses, and a light brown acrylic coating on the projections. Was in a state of progress.
The coating material A is spray-coated on the entire surface of the plate-like wall material at an application amount of 80 g / m ² (solid content), and after curing for 1 day, the coating material B is applied at an application amount of 3 g / m ² (solid content). Spray painted with and cured for 7 days. The coating and curing were all performed under standard conditions (temperature 23 ° C., relative humidity 50%).

As the covering material A, those shown below were used.
Covering material A1: acrylic polymer (methyl methacrylate-n-butyl acrylate-2-ethylhexyl acrylate copolymer resin, glass transition temperature 5 ° C.): aminosilane (N- (β-aminoethyl) -γ-aminopropyltrimethoxysilane) : Infrared reflective powder (iron-chromium composite oxide) = 98: 2: 8 (solid content weight ratio) black aqueous coating material.
Covering material A2: acrylic polymer (methyl methacrylate-n-butyl acrylate-2-ethylhexyl acrylate copolymer resin, glass transition temperature 5 ° C.): aminosilane (γ-aminopropyltrimethoxysilane): infrared reflective powder (iron chromium) Composite oxide) = 98: 2: 8 (solid weight ratio) black aqueous coating material.
Covering material A3: acrylic polymer (methyl methacrylate-n-butyl acrylate-2-ethylhexyl acrylate copolymer resin, glass transition temperature 5 ° C.): aminosilane (N- (β-aminoethyl) -γ-aminopropyltrimethoxysilane) : Dimethylsiloxane (composition of dimethylsiloxane oligomer): Black aqueous coating material of infrared reflecting powder (iron-chromium composite oxide) = 78: 20: 2: 8 (solid content weight ratio).
Covering material A4: acrylic polymer (methyl methacrylate-n-butyl acrylate-2-ethylhexyl acrylate copolymer resin, glass transition temperature 5 ° C.): dimethyl siloxane (composition of dimethyl siloxane oligomer): infrared reflective powder (iron chromium) Complex oxide) = 80: 20: 8 (solid weight ratio) black aqueous coating material.
Covering material A5: acrylic polymer (methyl methacrylate-n-butyl acrylate-2-ethylhexyl acrylate copolymer resin, glass transition temperature 5 ° C.): silane compound (γ-glycidoxypropyltrimethoxysilane): infrared reflective powder (Iron-chromium composite oxide) = 98: 2: 8 (solid content weight ratio) black aqueous coating material.
Covering material A6: acrylic polymer (methyl methacrylate-n-butyl acrylate-2-ethylhexyl acrylate copolymer resin, glass transition temperature 5 ° C.): silane compound (polyether chain-containing trimethoxysilane): infrared reflective powder (iron Chromium composite oxide) = 98: 2: 8 (solid content weight ratio) black aqueous coating material.
Covering material A7: Acrylic polymer (methyl methacrylate-n-butyl acrylate-2-ethylhexyl acrylate copolymer resin, glass transition temperature 5 ° C.): Silane compound (vinyltrimethoxysilane): Infrared reflective powder (iron chromium composite oxidation) Product) = 98: 2: 8 (solid weight ratio) black aqueous coating material.
Covering material A8: acrylic polymer (methyl methacrylate-n-butyl acrylate-2-ethylhexyl acrylate copolymer resin, glass transition temperature 5 ° C.): dimethylsiloxane (composition of dimethylsiloxane oligomer): infrared absorbing powder (carbon black ) = 80: 20: 8 (solid weight ratio) black aqueous coating material.

As the coating material B, the following materials were used.
Coating material B1: Silica (water-dispersible silica sol, pH 7.6, average primary particle size 27 nm): acrylic silicon polymer (methyl methacrylate-n-butyl acrylate-2-ethylhexyl acrylate-γ-methacryloyloxypropyltrimethoxysilane copolymer) Resin, glass transition temperature 18 ° C.) = 1.5: 1 (solid weight ratio) aqueous dispersion.
Covering material B2: An aqueous dispersion of acrylic silicon polymer (methyl methacrylate-n-butyl acrylate-2-ethylhexyl acrylate-γ-methacryloyloxypropyltrimethoxysilane copolymer resin, glass transition temperature 18 ° C.).

(Test method)
The plate-like wall material obtained by the above-described method was immersed in a contaminant suspension (concentration: 1% by weight) for 2 hours, pulled up and allowed to stand for 24 hours in a standard state, and then washed and dried. An infrared lamp was irradiated from a distance of 50 cm to the coating of the plate-like wall material subjected to the above treatment, and the temperature of the back of the test specimen when the temperature rise reached equilibrium was measured to evaluate the temperature rise inhibitory property. Evaluation is “A” when the temperature is less than 55 ° C., “B” when the temperature is 55 ° C. or more and less than 60 ° C., “C” when the temperature is 60 ° C. or more and less than 65 ° C., 65 ° C. or more Was performed in four stages (A>B>C> D), where “D” was the result.

(Test results)
Table 1 shows the coating materials used in the above test and the test results. In Test Examples 1 to 7, good results were obtained.

<Test II>
(Test specimen production)
Prepare the same plate-like wall material as in the above <Test I>, two plate-like wall materials are provided side by side, and a modified silicone sealant (resin component: containing alkoxysilyl group) at the connecting portion (width 10 mm) between the boards A substrate filled with a polyether polymer and a plasticizer content of less than 1% by weight was used as a substrate to be coated.
The entire surface of the substrate thus obtained is spray-coated with a coating material A at a coating amount of 80 g / m ² (solid content), and after curing for 1 day, a coating material B is coated with a coating amount of 3 g / m ^2. (Solid content) was spray coated and cured for 7 days. All painting and curing were performed under standard conditions.

(Test method)
-Adhesion test After immersing the test specimen (300 x 150 mm) prepared by the above method in warm water at 50 ° C for 72 hours, put a crosscut with a cutter knife on the coating of each part (connecting part, concave part, convex part), Adhesion was evaluated by affixing a tape to the crosscut portion and peeling it off. The evaluation was performed in three stages (A>B> C) where “A” indicates that no abnormality was observed and “C” indicates that peeling was observed.

-Followability test About the test body (300x150mm) produced by the said method, the surface state when it displaced 30% in a horizontal direction with a tension tester in a standard state was observed, and followability was evaluated. The evaluation was performed in three stages (A>B> C) where “A” indicates no abnormality and “C” indicates abnormality such as cracking or peeling.

(Test results)
Table 2 shows the coating materials used in the above test and the test results. In Test Examples 11 to 13, generally good results were obtained.

<Test III>
(Test specimen production)
As the base material to be coated, the same material as the above <Test II> was prepared.
The coating material A was spray-coated on the entire surface of the base material at a coating amount of 80 g / m ² (solid content) and cured for 2 hours. Next, the coating material A ′ was roller-coated with a coating amount of 80 g / m ² (solid content) only on the convex portions, and cured for 1 day. Thereafter, the entire surface of the substrate was spray-coated with a coating amount B of 3 g / m ² (solid content) and cured for 7 days. All painting and curing were performed under standard conditions.

As the covering material A ′, the following materials were used.
Covering material A′1: acrylic polymer (methyl methacrylate-n-butyl acrylate-2-ethylhexyl acrylate copolymer resin, glass transition temperature 5 ° C.): dimethylsiloxane (composition of dimethylsiloxane oligomer): infrared reflective powder ( Mixture of titanium oxide, iron oxide and iron-chromium composite oxide) = 80: 20: 65 (weight ratio of solid content), light brown.

(Test method, test results)
An adhesion test and a followability test were performed in the same manner as in the above <Test II>. Table 3 shows the coating materials used in the test and the test results. In Test Example 18, good results were obtained.

1: Existing wall surface 2: Plate-shaped wall material 3: Existing coating 31, 32: Colored region 4: Sealing material A: Colored coating (A)
A ′: Colored coating (A ′)
B: Transparent coating (B)

Claims (5)

It is a decorative wall surface with a decorative film against an existing wall surface that has deteriorated over time,
The existing wall surface is constituted by a plurality of plate-like wall materials having an uneven pattern,
As the cosmetic coating,
The surface of the existing wall surface is provided with a colored coating (A) containing infrared reflective powder,
A decorative wall surface comprising a transparent coating (B) containing silica having an average primary particle diameter of 1 to 200 nm on the colored coating (A).   The decorative wall surface according to claim 1, wherein a sealing material is filled in a connecting portion between the plate-like wall materials in the existing wall surface. A colored film (A ′) that is different in color from the colored film (A) and includes an infrared reflective powder and / or an infrared transmissive powder with respect to a partial region on the colored film (A). Provided,
The decorative wall surface according to claim 1 or 2, wherein the transparent coating (B) is provided on the colored coating (A ').   The decorative wall surface according to any one of claims 1 to 3, wherein the colored coating (A) is a mixture of infrared reflective powder and aminosilane in an acrylic polymer matrix.   The decorative wall surface according to any one of claims 1 to 3, wherein the colored coating (A) is a mixture of infrared reflective powder, aminosilane, and dimethylsiloxane in an acrylic polymer matrix.

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