JP2004244861A - Repair method for ceramic tile surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a repair method for a further deteriorated or polluted ceramic tile surface, which can enhance beauty while maintaining a contrast between a joint part and a tile part. <P>SOLUTION: After the overall application of a colored transparent paint (A) with a contrast ratio of 0.10-0.60, a paint (B) is applied. In the paint (B), a colored transparent paint (b-1) with a contrast ratio of 0.10-0.95, different in hue from the paint (A), is granularly dispersed in a transparent paint (b-2) with a contrast ratio of less than 0.10. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for repairing a ceramic tile surface used for exterior finishing of a building or the like.
[0002]
[Prior art]
Finishing with ceramic tiles, such as porcelain tiles, ceramic tiles, semi-porcelain tiles, and ceramic tiles, generally has good durability and good design, so it is necessary to protect the building, Used favorably for improvement.
[0003]
However, in the case of a ceramic tile constructed for exterior use of a building or the like, the ceramic tile is exposed for a long time under an environment affected by sunlight, wind and rain. As a result, the ceramic tile portion of the ceramic tile surface (hereinafter, also referred to as “tile portion”) may have reduced gloss, fading, erosion, or neutralization of the joint portion (hereinafter, also referred to as “joint portion”) of the ceramic tile surface. Deterioration such as reduction in strength proceeds. Furthermore, pollution progresses due to airborne dust, floating pollutants such as exhaust gas, efflorescence and rust from inside the frame, oil from the sealing material, and the like. With respect to such a ceramic tile surface, there is a need for renovation in order to restore durability, design, and the like.
[0004]
As a method for repairing a ceramic tile surface, Japanese Patent Application Laid-Open No. Hei 6-33565 proposes a method of laminating a clear paint containing no pigment. In the invention, it is stated that by using the clear paint, waterproofness can be imparted without changing the design of the existing ceramic tile surface.
[0005]
The invention is applicable to a ceramic tile surface with a small degree of deterioration or contamination. However, it is necessary to improve the aesthetics of surfaces that have been significantly degraded due to long-term exposure and have undergone significant discoloration, or those that have become so contaminated that they cannot be completely removed even after cleaning. And the problem of design cannot be solved.
[0006]
In order to deal with the problem of deterioration and contamination, there is a method of applying a coloring paint to the ceramic tile surface. However, if the entire ceramic tile surface is painted with the same color, the contrast between the joint portion and the tile portion is lost, and the appearance becomes monotonous. In addition, when the existing tile has various patterns such as a spot pattern, the patterns are also lost.
[0007]
A method of painting the joint and the tile with different color paints, such as a method of painting only the tile by masking the joint after painting the entire ceramic tile surface, has also been proposed. However, in such a method, there is a problem that a work process is complicated.
[0008]
[Patent Document 1] JP-A-6-33565
[Problems to be solved by the invention]
The present invention has been made in view of such a problem, and an object of the present invention is to provide a method for improving the aesthetics of a ceramic tile surface on which deterioration or contamination has progressed while making use of the design property of the existing tile surface. It is assumed that.
[0010]
[Means for Solving the Problems]
In order to solve such problems, the present inventors have assiduously studied and, as a result, have found a method of applying a colored transparent paint having a specific opacity and then applying a paint in which the colored transparent paint having a specific opacity is dispersed in a granular form. Thus, the present invention has been completed.
[0011]
That is, the method for repairing a porcelain tile surface of the present invention has the following features.
1. It is a method of repairing the ceramic tile surface by painting,
A first step of coating the entire surface with a colored transparent paint (A) having an opacity of 0.10 to 0.60;
The colored transparent paint (b-1) having an opacity of 0.10 to 0.95 and a hue different from that of the colored transparent paint (A) is included in the transparent paint (b-2) having an opacity of less than 0.10. A second step of applying the paint (B) dispersed in a granular form,
A method for repairing a ceramic tile surface comprising:
2. The colored transparent paint in the first step contains a hydrolyzable silyl group as a binder. How to repair the ceramic tile surface described.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail based on its embodiments.
[0013]
The present invention is applied to a ceramic tile surface such as a building exterior.
Examples of the type of ceramic tile include porcelain tile, clay tile, semi-porcelain tile, and ceramic tile. The degree of such deterioration or contamination of the tile surface is not particularly limited, and may be such that the deterioration or contamination has been significantly advanced by long-term exposure. The present invention is particularly effective in repairing a ceramic tile surface having a speckled pattern.
Such a ceramic tile surface is generally formed by forming a base on a base material with a base mortar, setting a ceramic tile on a base mortar, and filling the joint with a joint mortar. Therefore, the joints between the ceramic tiles are usually in a state where the mortar is exposed.
[0014]
In the present invention, as a first step, a colored transparent paint (A) having an opacity of 0.10 to 0.60 is applied over the entire surface.
By this process, while maintaining the design of the existing ceramic tile surface, the contamination, scratches, and the like generated in the tile portion can be made inconspicuous, and the hue, gloss, and the like damaged by aging can be restored. In addition, in this step, the paint is also applied to the joints, but the hue of the joints does not change much because the concealment ratio of the paint is set to be low. For this reason, the contrast between the tile portion and the joint portion can be maintained. It is also possible to improve the stain resistance, waterproofness, weather resistance, etc. of the entire tile surface.
[0015]
The hiding ratio of the colored transparent paint (A) used in the first step is 0.10 to 0.60 (preferably 0.20 to 0.50, more preferably 0.25 to 0.45). If the hiding ratio of the colored transparent paint (A) is less than 0.10, there is a possibility that contamination, scratches, fading, etc. may be conspicuous. When the concealment ratio is larger than 0.60, it is difficult to make use of the design property of the existing tile surface. Further, the contrast between the tile portion and the joint portion tends to be unclear, and the entire tile may have a monotonous appearance.
[0016]
The concealment ratio in the present invention is a value measured according to JIS K5400-1990 7.2 “Occlusion ratio”. Specifically, the paint to be used at the time of painting (when dilution is performed, the diluted paint) is applied to the opacity test paper with a film applicator (a gap of 150 μm). Is a value calculated by the following equation after measuring the luminous reflectance of the test piece dried for 48 hours at
<Formula> Opacity = (visual reflectance of coating on black ground) / (luminous reflectance of coating on white ground)
[0017]
The hue of the colored transparent paint (A) can be appropriately set within the above-mentioned hiding ratio. When finishing with a similar color to the existing tile, the hue of the colored transparent paint (A) may be set to a color similar to the base color of the existing tile portion according to the color pattern of the existing tile to be repaired. In addition, the hue can be completely different from the existing tile.
[0018]
The colored transparent paint (A) used in the first step usually contains a binder and a colorant as essential components.
[0019]
Examples of the binder include an ethylene resin, a vinyl acetate resin, a polyester resin, an alkyd resin, a vinyl chloride resin, an epoxy resin, an acrylic resin, a urethane resin, a silicone resin, a fluororesin, and the like, or a combination thereof. . These can be used alone or in combination of two or more.
In the present invention, a binder containing a hydrolyzable silyl group as a functional group is particularly preferable. When such a binder is used, excellent adhesion to various ceramic tiles and joints can be exhibited by the function of the functional group.
Examples of the binder containing a hydrolyzable silyl group include, for example, copolymers of a hydrolyzable silyl group-containing vinyl monomer and other monomers, and composites of various resins and a silane coupling agent. Is mentioned.
[0020]
Specifically, as a hydrolyzable silyl group-containing vinyl monomer, for example, γ- (meth) acryloxypropyltrimethoxysilane, γ- (meth) acryloxypropyltriethoxysilane, γ- (meth) acryloxy Propylmethyldimethoxysilane, γ- (meth) acryloxypropylmethyldiethoxysilane and the like.
[0021]
Examples of the silane coupling agent include γ-glycidoxypropylmethyldiethoxysilane, γ-glycidoxypropylmethyltriethoxysilane, β- (3,4 epoxycyclohexyl) ethyltrimethoxysilane, and N-β (amino Ethyl) γ-aminopropylmethyltriethoxysilane, γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane and the like.
[0022]
Examples of the coloring agent include inorganic pigments such as titanium oxide, zinc oxide, carbon black, ferric oxide (red iron oxide), yellow iron oxide, ocher, ultramarine, cobalt green, etc., azo, naphthol, pyrazolone, and anthraquinone. And organic pigments such as perylene, quinacridone, disazo, isoindolinone, benzimidazole, phthalocyanine and quinophthalone. It is also possible to use extenders such as heavy calcium carbonate, clay, kaolin, talc, precipitated barium sulfate, barium carbonate, white carbon, and diatomaceous earth.
[0023]
Further, in addition to the above-mentioned components, components that can be generally used for paints can also be included. Such components include, for example, aggregates, fibers, thickeners, film-forming auxiliaries, leveling agents, wetting agents, plasticizers, antifreeze agents, pH adjusters, preservatives, fungicides, and algaecides , An antibacterial agent, a dispersant, an antifoaming agent, an ultraviolet absorber, an antioxidant, a catalyst, a crosslinking agent and the like.
[0024]
The medium of the colored transparent paint (A) is not particularly limited, and is a strong solvent containing an aromatic hydrocarbon solvent as a main component, a weak solvent containing an aliphatic hydrocarbon solvent as a main component, or containing water as a main component. Various forms such as an aqueous system can be used.
[0025]
In the first step, such a colored transparent paint (A) is uniformly applied to the ceramic tile surface. The coating device is not particularly limited, and a known coating device such as a brush, a spray, and a roller can be used.
The amount of the colored transparent paint (A) to be applied may be appropriately set in consideration of the type and state of the ceramic tile, but is usually about 50 to 300 g / m ² . With such a coating amount, a beautiful appearance can be obtained while sufficiently utilizing the design properties of the existing tile surface.
[0026]
In the present invention, as a pre-process of the first step, a process such as cleaning may be performed on joints or the entire tile surface. Further, if necessary, a transparent undercoat paint or the like can be applied.
[0027]
In the second step of the present invention, the opacity is 0.10 to 0.95, and the colored transparent paint (b-1) having a hue different from that of the colored transparent paint (A) has an opacity of less than 0.10. A coating material (B) which is dispersed in a granular form in the transparent coating material (b-2) is applied. By this step, a spot pattern is given to the tile portion, and the aesthetic appearance is enhanced.
In this step, the entire ceramic tile surface may be coated, or only the tile portion may be coated. When paint is applied to the entire ceramic tile surface, paint is also applied to the joints.However, the paint concealment rate is set low, The contrast of the joint is maintained.
[0028]
The hiding ratio of the colored transparent paint (b-1) in the paint (B) is 0.10 to 0.95 (preferably 0.30 to 0.90, more preferably 0.50 to 0.90). When the opacity of the colored transparent paint (b-1) is in such a range, it is possible to impart a glazed tile-like depth feeling. If the hiding ratio of the colored transparent paint (b-1) is smaller than 0.10, it becomes difficult to enhance the aesthetics of the tile portion due to a spot pattern. If the concealment ratio is larger than 0.95, the spots applied to the joints become conspicuous, and the contrast between the tiles and the joints may be unclear.
[0029]
The hue of the colored transparent paint (b-1) is different from that of the above-mentioned colored transparent paint (A). In the case where the existing tile has a spot pattern, if the hue of the colored transparent paint (b-1) is set to a color similar to the spot pattern of the existing tile portion, the same finish as the existing tile can be obtained, but a different hue is required. Can also.
[0030]
Such a colored transparent paint (b-1) has a binder and a colorant as main components, similarly to the above-mentioned colored transparent paint (A), and is the same as that exemplified in the colored transparent paint (A). Can be appropriately used.
[0031]
As the transparent paint (b-2) in the paint (B), one having an opacity of less than 0.10 is used. This component mainly serves to fix the dispersed particles of the colored transparent paint (b-1) to the surface to be coated, and contains a binder as an essential component. As the binder, the same raw materials as those exemplified for the colored transparent paint (A) can be used as appropriate.
[0032]
The medium of the colored transparent paint (b-1) and the transparent paint (b-2) in the paint (B) is not particularly limited, and a non-aqueous medium such as an aromatic hydrocarbon solvent and an aliphatic hydrocarbon solvent and water are used. Any of the aqueous media as the main component may be used. For example, when the colored transparent paint (b-1) is a non-aqueous medium and the transparent paint (b-2) is an aqueous medium (oil-in-water type), the colored transparent paint (b-1) and the transparent paint (b-2) Are both aqueous media (underwater-water type).
[0033]
As a method of dispersing the colored transparent paint (b-1) into the transparent paint (b-2) in a granular form, a method known in the field generally called a multicolor paint may be adopted. For example, there is a method in which the transparent paint (b-2) is charged into a stirring tank, and the colored transparent paint (b-1) produced in advance is gradually added while stirring with a mixing and dispersing device such as an impeller. Can be
At this time, by appropriately adjusting the size of the stirring tank, the shape and size of the impeller, the stirring speed, the viscosity of the paint, the mixing method, and the like, the shape and particle size of the particles to be formed can be appropriately adjusted. If necessary, the strength and the like of the particles can be adjusted by using a crosslinking agent, a curing catalyst, and the like.
The particle size of the colored transparent particles in the paint (B) is usually about 0.1 to 3 mm. The mixing ratio of the colored transparent paint (b-1) and the transparent paint (b-2) is usually about 1: 9 to 7: 3 in terms of the weight ratio of (b-1) :( b-2). .
[0034]
When applying the paint (B) in the second step, a spray, a roller, a brush, or the like can be used as a coating tool. The amount applied when applying the paint (B) is usually about 50 to 300 g / m ² .
In the case of displaying a plurality of spots, a paint in which a plurality of colored transparent paints (b-1) are dispersed in a granular form may be used.
In the present invention, after the second step, a transparent paint or the like can be applied as necessary.
[0035]
【Example】
Examples and comparative examples are shown below to further clarify the features of the present invention.
[0036]
(Example 1)
Production of paint for first step 65 parts by weight of resin A (hydrolyzable silyl group-containing acrylic resin, weight average molecular weight 20,000, solid content 55% by weight, mineral spirit solution), 0.5 part by weight of curing agent (dibutyltin dilaurate) Parts, 34.5 parts by weight of a solvent (mineral spirit), 1 part by weight of titanium oxide, 0.2 parts by weight of yellow iron oxide, 0.01 parts by weight of red iron oxide, and 0.001 parts by weight of carbon black are uniformly mixed by a conventional method. As a result, a paint “A1” for the first step was produced. The concealment ratio of this paint “A1” was 0.33.
[0037]
Production of paint for second step 65 parts by weight of resin A, 32 parts by weight of solvent (mineral spirit), 3 parts by weight of viscosity modifier (synthetic bentonite), 0.2 parts by weight of yellow iron oxide, 0.4 parts by weight of red iron oxide, 0.1 parts by weight of carbon black was uniformly mixed by a conventional method to produce a colored transparent coating "b {circle around (1)}". The concealment ratio of this paint "b (1)" was 0.62.
On the other hand, 15 parts by weight of resin B (acrylic resin synthetic resin emulsion, solid content: 50% by weight) and 85 parts by weight of resin C (7% by weight aqueous solution of polyvinyl alcohol) are uniformly mixed by a conventional method to obtain a transparent paint “b”. (2) "was manufactured. The concealment ratio of this paint “bｂ2” was 0.04.
Next, after the paint “b 2” is charged into the stirring tank, the above-mentioned paint “b 1” is gradually mixed with a curing agent (dibutyltin dilaurate) while stirring with an impeller. As a result, a coating material "B1" in which the coating material "b1" was dispersed in the coating material "b2" in a granular form (particle diameter: about 1 mm) was produced. Here, the weight ratio of the paint “b <1>” to the paint “b <2>” was 2: 8. Further, the curing agent was mixed at a ratio of 0.5% by weight with respect to the paint "b (1)".
[0038]
-The paint joint of the ceramic tile surface is made of gray cement mortar, and the tile portion is made of a porcelain tile having a dark brown spot pattern on a base color of ocher. The process paint “A1” was uniformly spray-coated at a coating amount of 200 g / m ² , and then dried at room temperature (23 ° C.) for 3 hours. Next, the second process coating material “B ▲ 1 ▼” was spray-coated uniformly at a coating amount of 80 g / m ² .
By the above-described coating, the aesthetics of the entire tile surface can be dramatically improved. The contrast between the tile portion and the joint portion in the finished appearance was also clear.
[0039]
(Comparative Example 1)
Paint A-2 was prepared by uniformly mixing 65 parts by weight of resin A, 0.5 parts by weight of a curing agent (dibutyltin dilaurate), and 34.5 parts by weight of a solvent (mineral spirit) by a conventional method. The concealment ratio of this paint “A2” was 0.03.
The same tile surface as in Example 1 was uniformly spray-coated with the coating material “A 2” at a coating amount of 200 g / m ² and then dried at normal temperature.
With the above coating, the contamination remaining in the tile portion was exposed, resulting in poor aesthetics.
[0040]
(Comparative Example 2)
65 parts by weight of resin A, 0.5 parts by weight of curing agent (dibutyltin dilaurate), 34.5 parts by weight of solvent (mineral spirit), 2.6 parts by weight of titanium oxide, 0.5 parts by weight of yellow iron oxide, 0.03 parts by weight of red iron oxide Part A and 0.003 parts by weight of carbon black were uniformly mixed by a conventional method to obtain a coating material "A {circle around (3)}". The concealment ratio of this paint "A (3)" was 0.74.
The same tile surface as in Example 1 was uniformly spray-coated with the coating material “A 3” at a coating amount of 200 g / m ² and then dried at normal temperature.
In the above coating, the contrast between the tile portion and the joint portion became unclear, resulting in a monotonous finish.
[0041]
【The invention's effect】
By applying the present invention to a ceramic tile surface on which deterioration or contamination has progressed, aesthetics can be enhanced while making use of the design properties of the existing tile surface.

Claims (2)

It is a method of repairing the ceramic tile surface by painting,
A first step of coating the entire surface with a colored transparent paint (A) having an opacity of 0.10 to 0.60;
The colored transparent paint (b-1) having an opacity of 0.10 to 0.95 and a hue different from that of the colored transparent paint (A) is included in the transparent paint (b-2) having an opacity of less than 0.10. A second step of applying the paint (B) dispersed in a granular form,
A method for repairing a ceramic tile surface comprising: 2. The method according to claim 1, wherein the colored transparent paint in the first step contains a hydrolyzable silyl group as a binder.