JP2007247279A - Repair method for existing external facing tile wall surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a repair method for an existing external facing tile wall surface for recovering design, imparting an antifouling function and enhancing waterproofness by effectively imparting a tile piece flaking preventive effect while leaving the appearance of color tone and hue of the existing external facing tile wall surface. <P>SOLUTION: In the repair method for the existing external facing tile wall surface, transparent primer is applied to the existing external facing tile wall surface to form a primer layer 2, and main material paint containing transparent acrylic resin emulsion as a main component is applied to the primer layer 2 a plurality of times to form a main material layer 3. Top coat paint is then applied to the main material layer 3 to form a top coat layer 4. The main material paint contains reinforcing short fiber mixed therein, and has a viscosity of 20,000-70,000 mPa s and a thixotropy index of 4.0-10.0. It is preferable to include a process for reinforcing the main material layer 3 with net-like cloth 5 and a process for driving anchor pins 6 into the existing external facing tile wall surface. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an existing exterior tile wall surface repair method for an existing exterior tile wall surface that prevents tile pieces from peeling off, recovers and beautifies the design, and enhances waterproofness.

  Exterior tile wall surfaces in buildings have complex performance requirements such as structural functions, living functions, protective functions, and beauty. However, with the lapse of time, deterioration progressed, the appearance and protection function declined, the invasion of rainwater promoted the aging of the building, eventually peeling off the surface finish layer, and in the long term, it developed into a structural function problem, and the surface Stripping of the finishing tiles can sometimes lead to man-made disasters, requiring repairs.

  As a method of renovating the existing exterior wall surface, there is known a method of covering the existing exterior wall surface with polymer cement and using an anchor pin together to prevent the exterior finish layer from peeling off. In this case, a separate exterior finish material is applied. It is necessary and the existing wall texture is lost. As a method of repairing the wall surface of the existing exterior tile, there is a high demand for finishing with the color tone and hue of the tile.

  In Patent Document 1, a glass mat, cloth, etc. are provided on the entire surface of a tile construction wall for the purpose of preventing the tile from dropping and lifting from the frame structure of the tile against deterioration over time of the exterior tile wall in the building. Is impregnated with an unsaturated polyester resin, a transparent FRP resin layer is formed, a transparent paint with good weather resistance is applied to the surface, and it is dried and cured. A construction method is disclosed in which a screw (anchor pin) reaching the housing structure part from the surface is driven and integrally strengthened.

In addition, as a method of repairing exterior tile wall surfaces for the purpose of preventing tile pieces from peeling off, restoring design properties, and providing anti-smudge functions on exterior tile wall surfaces, the topcoat layer is mainly composed of a silicone-modified acrylic resin. A method using a paint is known (for example, Patent Document 2).
Japanese Patent Laid-Open No. 63-219762 Japanese Patent Laid-Open No. 2005-082988

  However, in the method disclosed in Patent Document 1, the basic appearance of the existing tile finish is maintained, but the joint portion of the glass mat is conspicuous, and depending on the reflection of light, the exterior tile wall surface composed of the tile portion and joint portion The existing texture was blurred, and the design was impaired. In particular, in the case of a tile wall surface of a semi-glossy or matte type tile, the texture of the existing tile wall surface is significantly blurred. For this reason, when a glossy topcoat layer is formed on the wall surface of an existing exterior tile using a glossy tile, the method disclosed in Patent Document 1 can be applied, but a semi-glossy or matte-type exterior tile can be applied. A semi-glossy or matte topcoat layer could not be formed on the wall surface, and the range of selectivity for glossiness was limited.

  In addition, when a coating mainly composed of a silicone-modified acrylic resin is used to form the main material layer, it is difficult to ensure a sufficient coating amount for obtaining a good peeling prevention effect, and the film thickness is It becomes thin and has poor crack followability.

  Therefore, the present invention has been made in view of the above-described problems of the prior art, and the problem to be solved by the present invention is to improve the appearance of the color tone and hue of the exterior tile wall surface when repairing the existing exterior tile wall surface. Providing a repair method for existing exterior tile walls that can effectively prevent tiles from peeling off, restore designability, provide anti-smudge functions, and enhance waterproofness while remaining. There is to do.

  In order to prevent this problem as a result of intensive studies, the present inventors have used a transparent acrylic resin in a repair method for existing exterior tile wall surfaces using a transparent primer, a transparent main material paint, and a transparent topcoat paint. By mixing reinforcing short fibers into the emulsion and using this as a main material paint having a high viscosity and a high thixotropy index, it has been found that the above problems are solved and that the coating properties are also excellent. Was completed.

  In the repair method of the existing exterior tile wall surface of the present invention, a primer layer is formed by applying a transparent primer to the existing exterior tile wall surface, and a main material paint mainly composed of a transparent acrylic resin emulsion is applied to the primer layer a plurality of times. A method of repairing an existing exterior tile wall surface by applying a transparent top coat paint to the main material layer to form a top coat layer, the main material paint comprising a reinforcing short coat A fiber is mix | blended, a viscosity is 20000-70000 mPa * s, and a thixotropy index is 4.0-10.0, It is characterized by the above-mentioned.

  Further, the repair method of the existing exterior tile wall surface of the present invention preferably includes a step of reinforcing the main material layer with a net-like cloth, and preferably includes a step of driving anchor pins into the existing exterior tile wall surface. Is preferably included at least once using a porous hand roller, and the main material paint contains 90 to 99% by mass of a transparent acrylic resin emulsion and 1 to 10% by mass of reinforcing short fibers. It is preferable that 1 to 5% by mass of reinforcing short fibers are included, the reinforcing short fibers are preferably nylon fibers, and the transparent primer is preferably a silicone-modified acrylic resin paint, The transparent topcoat paint is preferably a silicone-modified acrylic resin paint.

  According to the present invention, a primer layer is formed by applying a transparent primer to the wall surface of an existing exterior tile, and a main material layer is formed by applying a main material paint mainly composed of a transparent acrylic resin emulsion to the primer layer. In addition, since a top coat layer is formed by applying a transparent top coat paint to the main material layer, it can be coated while leaving the color tone and hue of the base tile, and the main material paint has reinforcing short fibers. The main material paint is blended and the main material paint having a viscosity of 20000 to 70000 mPa · s and a thixotropy index of 4.0 to 10.0 is applied a plurality of times to form the main material layer. It is possible to secure a thick main material layer, effectively imparting the tile stripping prevention effect, improving safety, restoring design properties, providing a dirt prevention function, and enhancing waterproofness Can be planned . According to this invention, the protective layer which consists of a primer layer, a main material layer, and a topcoat layer is formed. Since the primer layer is formed between the main material layer and the existing exterior tile wall surface, a protective layer having excellent adhesion and durability can be obtained. According to the present invention, the waterproof property is enhanced in addition to the tile stripping prevention function, so that it is possible to prevent rainwater from entering and prevent the building from aging. Furthermore, it is possible to safely and reliably prevent the tiled layer from peeling off without compromising the aesthetic appearance, which is one of the asset values, with respect to existing tiled buildings. In addition, according to the present invention, since extremely high transparency is ensured, the type of transparent top coat paint can be freely selected, and the top coat gloss can be adjusted in multiple stages, such as glossy, semi-glossy, and matte-free. It is possible to adjust, and the texture of the existing tile can be reproduced from both the color and the glossiness. Furthermore, it becomes easy to provide weather resistance.

  That is, according to the present invention, the existing exterior tile wall surface using the glossy tile is provided with the top coat layer of the glossy type so that the color tone of the existing glossy tile is utilized. The texture of the entire exterior tile wall surface including joints can be reproduced, and the existing exterior tile wall surface using a half gloss type tile is provided with a half gloss type top coat layer, thereby providing an existing half wall type top coat layer. The texture of the entire exterior tile wall surface including joints can be reproduced while taking advantage of the color tone of the glossy tile, and the matte type top is applied to the existing exterior tile wall surface using the mat type tile. By applying a coat layer, the texture of the entire exterior tile wall surface including joints while keeping the color tone of the existing matte tile It is possible to reproduce.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a construction diagram for explaining an outline of a repair method for an existing exterior tile wall surface according to an embodiment of the present invention. The repair method of the existing exterior tile wall surface of the present invention is to apply a transparent primer to the existing exterior tile wall surface 1 to form a primer layer 2, and to apply a main material paint mainly composed of a transparent acrylic resin emulsion to the primer layer 2. This is a method for repairing an existing exterior tile wall surface by applying a plurality of times to form a main material layer 3 and applying a transparent top coat paint to the main material layer 3 to form a top coat layer 4.

  The main material paint used in the present invention contains a transparent acrylic resin emulsion as a main component. Here, the acrylic resin refers to a resin mainly composed of an acrylic resin, an acrylic ester resin, a methacrylic resin or a methacrylic ester resin, and these acrylic resins (acrylic resin or acrylic ester resin). Or a methacrylic acid-based resin (referred to as a methacrylic acid resin or a methacrylic acid ester resin) that is silicone-modified, in particular, a concept including a silicone-grafted acrylic resin. The silicone graft acrylic resin refers to a resin containing a component obtained by grafting silicone to an acrylic acid resin or a methacrylic acid resin.

  In the present specification, the transparent acrylic resin emulsion refers to one obtained by dispersing a transparent acrylic resin among the above acrylic resins in a dispersion medium such as a solvent-based dispersion medium or an aqueous dispersion medium. Here, the transparent acrylic resin refers to a transparent acrylic resin when the main material layer 3 is formed, and it does not matter whether or not the emulsion is transparent. In the present invention, the transparent acrylic resin emulsion used for the main material paint is a transparent acrylic resin in which a transparent acrylic ester resin is dispersed in a solvent-based dispersion medium or an aqueous dispersion medium in order to ensure excellent transparency and weather resistance. Acid ester resin emulsions are preferred. As the main material paint, a silicone-modified acrylic latex paint in which a silicone graft acrylic resin is dispersed in a solvent-based dispersion medium or an aqueous dispersion medium can be suitably used.

In the present invention, reinforcing short fibers are blended in the main material paint. As the reinforcing short fibers used in the main material paint, it is preferable to use nylon fibers, vinylon fibers, polypropylene fibers, aramid fibers, acrylic fibers, carbon fibers, or the like, or a suitable mixture thereof. Among these, nylon fibers are particularly well-suited with the main material paint, are economical and can be used particularly preferably. The fiber length of the reinforcing short fibers is preferably about 2 to 30 mm, more preferably about 3 to 20 mm, particularly preferably about 4 to 6 mm, and the single yarn fineness is preferably 2 to 30 dtex. If the fiber length is 2 mm or less, it is difficult to obtain a length necessary for effective fixation, and if it is 30 mm or more, a fiber ball is formed and an appropriate dispersion state is not obtained, so that a required strength cannot be obtained. If the single yarn fineness is less than 2 dtex, it becomes easy to form a fiber ball, and if it exceeds 30 dtex, the adhesive surface area decreases for the amount of fibers and sufficient adhesive strength cannot be obtained. The elongation of the reinforcing short fibers is preferably 20 to 50%, the tensile strength is preferably 8.0 cN / dtex or more, and the elastic modulus is preferably 4000 to 6000 N / mm ² . The amount of the reinforcing short fibers supported is effectively in the range of 25 to 200 g per 1 m ^{2 of} the main material layer. If it is 25 g or less, a sufficient adhesion effect cannot be obtained, and if it exceeds 200 g, the amount of fibers becomes too large to be sufficiently entangled in the main material layer 3, and the adhesive strength is rather reduced.

  In the present invention, examples of the dispersion medium contained in the main material paint include a solvent-based dispersion medium and an aqueous dispersion medium. The aqueous dispersion medium may be water or water containing a dispersant for each of anionic, cationic, nonionic and amphoteric surfactants. When an aqueous dispersion medium is used, it is preferable in that there is no odor during construction. Examples of the solvent dispersion medium include alcohol dispersion medium, silicone dispersion medium, petroleum dispersion medium, glycol dispersion medium and the like. Use of a solvent-based dispersion medium is preferable in that the drying time can be shortened. Examples of the alcohol-based dispersion medium include methanol, ethanol, 1-propanol, 2-propanol, and the like, and examples of the silicone-based dispersion medium include dimethyl silicone, tetramer-hexameric siloxane, and the like. Examples of the dispersion medium include paraffinic hydrocarbons such as pentane, hexane, and heptane, industrial gasoline, kerosene, mineral split, isoparaffin, and cycloparaffin. Examples of the glycol dispersion medium include ethylene glycol, propylene glycol, and triglyceride. Examples include methylene glycol, 1,4-butanediol, and 1,5-pentanediol.

  In the present invention, a main material paint having a viscosity of 20000 mPa · s to 70000 mPa · s and a thixotropy index of 4.0 to 10.0 is used. Those having a viscosity of 40,000 mPa · s to 60000 mPa · s and a thixotropy index of 5.0 to 7.0 are more preferred. Here, the thixotropy index represents the time dependency of the viscosity at the same temperature, and the greater the index, the greater the thixotropy. If a main material paint having a viscosity less than the above is used, the paint drips during the coating process, making it difficult to secure a sufficient coating amount for obtaining a good peeling prevention effect. In addition, even when the viscosity is within the above range, when using a material that does not satisfy the thixotropy index, it is difficult to adjust the film thickness, and it tends to be covered with a thick layer. Despite the use of a highly transparent paint with a rough surface, it is difficult to ensure the appearance of the color tone and hue of the exterior tile wall surface, and in particular, the joints tend to be blurred.

  In the repair method of the existing exterior tile wall surface of the present invention, a transparent primer is applied to the existing exterior tile wall surface 1 to form a primer layer 2, and the primer layer 2 is mainly composed of a transparent acrylic resin emulsion. Is applied a plurality of times to form the main material layer 3, and a top coat transparent coating is applied to the main material layer 3 to form the top coat layer 4. Here, the transparent primer refers to a primer that is transparent when the primer layer 2 is formed, and it does not matter whether the primer itself is transparent. The transparent topcoat paint refers to a topcoat paint that is transparent when the topcoat layer 4 is formed, and it does not matter whether the topcoat paint itself is transparent.

  In the repair method of the existing exterior tile wall surface of the present invention, the reinforcing short fiber is blended, the viscosity is 20000 to 70000 mPa · s, and the thixotropy index is 4.0 to 10.0. When the main material layer 3 is formed by applying it a plurality of times, a suitable coating thickness and excellent surface strength of the main material layer 3 can be ensured. The number of application times of the main material paint is preferably 2 to 3 times.

  The main material paint preferably contains 90 to 99% by mass of a transparent acrylic resin emulsion and 1 to 10% by mass of reinforcing short fibers, and more preferably contains 1 to 5% by mass of reinforcing short fibers. It is preferable to contain 93-96 mass% transparent acrylic resin emulsion and 2-3 mass% short fiber.

Further, in the present invention, in addition to the above-mentioned components, the main material paint contains one or more third components selected from a film-forming aid, a thickener, an antifoaming agent and the like in advance as a dispersion medium. You may add to.
Kyowanol M (manufactured by Kyowa Hakko Co., Ltd.) or the like can be used as a film-forming aid, Chikuzoru (manufactured by Kyoeisha Chemical Co., Ltd.) or the like can be used as a thickener, and SN A former (manufactured by San Nopco Co., Ltd.) or the like can be used. 2 mass% or more is preferable and, as for the compounding quantity of the film forming adjuvant in a main material coating material, 3-5 mass% is more preferable. 0.1 mass% or more is preferable and the compounding quantity of the thickener in a main material coating material has more preferable 0.2-0.3 mass%. 0.1 mass% or more is preferable and the compounding quantity of the antifoamer in a main material coating material has more preferable 0.2-0.3 mass%.

  In the repair method of the existing exterior tile wall surface of the present invention, the main material layer 3 is preferably reinforced with a net-like cloth 5. By reinforcing the main material layer 3 with the net-like cloth 5, the surface strength of the main material layer 3 can be improved, and even if a main material paint having a high viscosity and a high thixotropy index in the above range is used, The coating thickness of the main material layer 3 can be easily adjusted without requiring skill, can achieve a wide range of uniformity of the coating thickness of the main material layer 3, and retains design properties Ensuring sufficient film thickness maintenance becomes easy. For example, the net cloth 5 is placed on the primer layer 2 and the main material paint is applied, or the main material paint is applied to the primer layer 2 to form the first main material layer and the first layer. By placing the net-like cloth 5 on the main material layer and applying the main material paint again, the main material layer 3 can be reinforced with the net-like cloth 5.

  Examples of the fiber material of the net-like cloth 5 include nylon, polyester, polypropylene, Teflon (registered trademark), carbon, polyethylene, etc., which have excellent chemical resistance, high strength, and low cost. From the point of availability, polyethylene, nylon or polyester is preferred. In order to improve transparency and obtain excellent design properties, the mesh size of the net cloth 5 is preferably 3.0 to 5.0 mm, and the transmissivity of the net cloth is preferably 95% or more.

  The repair method of the existing exterior tile wall surface of the present invention preferably includes a step of driving the anchor pin 6 into the existing exterior tile wall surface 1. By including the step of driving the anchor pin 6 into the existing exterior tile wall surface 1, the main material layer 3 can be firmly fixed to the existing exterior tile wall surface 1, and the tile piece can be more reliably prevented from peeling off. Here, examples of the existing exterior tile wall surface 1 include a tile wall surface in which a tile 1a is bonded to a frame structure portion 1c made of a concrete structure via a mortar layer 1b. By driving the anchor pin 6 so as to penetrate the mortar layer and reach the frame structure portion, it is possible to more reliably prevent the tile pieces and the mortar layer from peeling off. A general anchor pin 6 made of stainless steel can be used. As the step of driving the anchor pin 6, the step of driving the anchor pin 6 after forming the main material layer 3 and before forming the top coat layer 4 can be added, but the main material paint is applied to the primer layer 2 once. Alternatively, it is preferably included in the step of forming the main material layer 3 by driving the anchor pin 6 after the application, and further applying the main material paint once or a plurality of times. Moreover, the anchor pin 6 with the sheath 7 can be used suitably. In this case, before forming the primer layer 2, it is preferable to drill the existing exterior tile wall surface 1 in advance and put the sheath. As a position of perforation, the joint part of the existing exterior tile wall surface 1 is preferable.

  In each coating process of the primer layer 2, the main material layer 3, and the topcoat layer 4, it can apply | coat using a roller, a hand roller, a brush, a rake, or a trowel, However, It is preferable to use a hand roller. Compared to the spraying method, there is less scattering outside the workplace, curing can be reduced, and contamination of the work environment can be reduced. Moreover, in the coating process of the main material layer 3, the main material layer 3 is finished into a thick film by applying the main material paint using a porous hand roller (for example, sandbone roller, mastic (registered trademark) roller). It is more preferable in that it is possible to save labor and to obtain a concavo-convex pattern appearance. In particular, it is preferable to include a step of applying the main material paint at least once using a porous hand roller. By using a porous hand roller, it becomes easy to apply a main material paint having a high viscosity and a high thixotropy index in the above range to a thick film without requiring skill in coating technology, while maintaining design properties. Film thickness can be ensured. Apply the main material paint thinly with a trowel in the first layer main material coating process, and after drying, apply the main material paint with a porous hand roller (sand bone roller) in the second layer main material coating process. Makes it easy to uniformly apply a wide range of application surfaces while providing a concavo-convex pattern, resulting in a pattern equivalent to a general-purpose exterior finish material, improved design, and long-term The durability can also be improved.

  As the transparency primer used in the repair method for the wall surface of the existing exterior tile of the present invention, a commercially available coating can be used as long as the finished coating is a colorless and transparent coating. Acrylic resin, silicone resin, silicone modified A solvent-based or water-based paint having a viscosity of about 50 mPa · s to 200 mPa · s, which is mainly composed of acrylic resin, urethane resin, acrylic urethane resin, epoxy resin, vinyl ester resin, fluorine resin, etc. Can be used. In particular, silicone-modified acrylic resin coatings based on silicone-modified acrylic resins with alkoxysilyl groups added to acrylic resins with excellent weather resistance form stable siloxane bonds by cross-linking and are excellent. It is also preferable in that it exhibits excellent durability and the dealcoholization reaction of alkoxysilyl groups exhibits strong adhesion to inorganic materials. The primer layer 2 has a function of imparting waterproofness and high durability to the entire surface of the existing exterior tile wall surface 1 while providing adhesion between the tile exterior surface and the main material layer 3.

  As the transparent top coat paint used in the repair method of the existing exterior tile wall surface of the present invention, a commercially available paint can be appropriately used as long as the finished coating film is a colorless and transparent paint, an acrylic resin, a silicone resin, Paints such as silicone-modified acrylic resins, urethane resins, acrylic urethane resins, and fluorine resins can be suitably used. In particular, a silicone-modified acrylic resin coating having an alkoxysilyl group in an acrylic resin excellent in weather resistance forms a stable siloxane bond by crosslinking, and exhibits excellent hydrophilicity, low contamination, and durability. This is preferable in terms of points.

The repair method of the existing exterior tile wall surface of one Embodiment of this invention is demonstrated. In the repair method of the existing exterior tile wall surface of this embodiment, an acrylic emulsion in which a transparent acrylic resin (butyl acrylate / methyl methacrylate copolymer) is dispersed in an aqueous dispersion medium so that the solid content of the resin is 40 to 50%. (94% by mass), 2.0% by mass nylon short fiber (fiber length 5 ± 1 mm, elongation 20-50%, tensile strength 8.0 cN / dtex or more, elastic modulus 4000-6000 N as reinforcing short fiber / Mm ² ), 3.5% by weight of Kyowanol M (made by Kyowa Hakko Co., Ltd.) as a film-forming aid, 0.25% by weight of Chikuzol (made by Kyoeisha Chemical Co., Ltd.) as a thickener, and as an antifoaming agent A main material paint in which 0.25 mass% SN deformer (manufactured by San Nopco Co., Ltd.) was blended was used. The same main material paint was used for the first layer, the second layer, and the third layer. This main material paint has a viscosity of 48000 mPa · s and a thixotropy index of 5.7. Further, the same silicone-modified acrylic resin paint was used for the transparent primer, the first transparent top coat paint, and the second transparent top coat paint. A polyethylene net cloth 5 having an opening of 3 to 5 mm and a transmittance of 96% was used. The viscosity of the main material paint was measured at a temperature of 23 ° C. using a BH type rotational viscometer manufactured by TOKIMEC INK. The thixotropy index (TI) was also measured using a BH type rotational viscometer manufactured by TOKIMEC INK. The viscosity (η ₂ ) at ₂ rpm and the viscosity (η ₂₀ ) at ₂₀ rpm were measured at a temperature of 23 ° C. and obtained as TI = η ₂ / η ₂₀ .

  First, after drilling to reach the frame structure part through the mortar layer at intervals of about 500 mm, and inserting the anchor pin sheath 7, the fragile layer on the surface of the existing exterior tile wall surface 1, other dust and foreign matter Was completely removed.

  Next, the above-described transparent primer is rubbed into the nests and scars existing on the surface of the existing exterior tile wall surface 1 using the normal hand roller on the entire surface of the existing exterior tile wall surface 1 that has been cleaned. The primer layer 2 was formed by coating.

  Next, the main coating material of the first layer is thinly applied to the surface of the existing exterior tile wall surface 1 (specifically, the surface of the primer layer 2) using a trowel and dried, and then anchor pins are attached to the sheath 7 described above. 6, the above-mentioned nylon net cloth 5 is placed, the second layer main material paint is thickly applied using a mastic (registered trademark) roller, dried, and then the third layer main material. The paint was applied thick using a Mastic® roller.

  Further, after drying, the first transparent top coat paint is applied using a normal hand roller, and after drying, the second transparent top coat paint is applied using a normal hand roller. And dried to complete.

The coating amount of the transparent primer is about 0.15 kg / m ² , the coating amount of the first main material layer is about 0.7 kg / m ² , and the coating amount of the second main material layer is Is about 1.2 kg / m ² , the coating amount of the third main material layer is about 1.2 kg / m ² , and the coating amount of the first topcoat layer is about 0.15 kg. / M ² , and the coating amount of the second top coat layer was about 0.15 kg / m ² . Further, the carrying amount of the reinforcing short fibers was 60 g per 1 m ^{2 of} the main material layer.

  The repair method of the existing exterior tile wall surface according to one embodiment of the present invention prevents the tile pieces from peeling off, prevents intrusion of various factors that deteriorate the building, and does not impair the texture of the existing exterior tile wall surface. It is an epoch-making method that can be restored and extends the life cycle of the building itself and increases its value.

FIG. 1 is a construction diagram for explaining an outline of a repair method for an existing exterior tile wall surface according to an embodiment of the present invention.

Explanation of symbols

1: Existing exterior tile wall, 1a: tile, 1b: mortar layer, 1c: frame structure (concrete structure), 2: primer layer, 3: main material layer, 4: topcoat layer, 5: net-like cloth, 6: Anchor pin, 7: Saya

Claims (8)

A primer is formed by applying a transparent primer to the wall surface of the existing exterior tile, and a main material layer is formed by applying a main material paint mainly composed of a transparent acrylic resin emulsion to the primer layer. A method of repairing an existing exterior tile wall surface by applying a transparent topcoat paint to a material layer to form a topcoat layer,
A method for repairing a wall surface of an existing exterior tile, wherein the main material paint contains reinforcing short fibers, has a viscosity of 20000 to 70000 mPa · s, and a thixotropy index of 4.0 to 10.0.   The method of repairing an existing exterior tile wall surface according to claim 1, further comprising a step of reinforcing the main material layer with a net-like cloth.   The repair method of the existing exterior tile wall surface of Claim 1 or 2 including the process of driving an anchor pin into the existing exterior tile wall surface.   The method for repairing an existing exterior tile wall surface according to any one of claims 1 to 3, comprising a step of applying the main material paint at least once using a porous hand roller.   5. The existing paint according to claim 1, wherein the main material paint includes 90 to 99% by mass of a transparent acrylic resin emulsion and 1 to 10% by mass of reinforcing short fibers. Repair method for exterior tile wall.   The method for repairing an existing exterior tile wall surface according to any one of claims 1 to 5, wherein the reinforcing short fibers are nylon fibers.   The method for repairing an existing exterior tile wall surface according to any one of claims 1 to 6, wherein the transparent primer is a silicone-modified acrylic resin paint. The method for repairing an existing exterior tile wall surface according to any one of claims 1 to 7, wherein the transparent top coat paint is a silicone-modified acrylic resin paint.

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