JP2015200108A - Outer wall painting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outer wall painting method of maintenance-free over a long period and enhancing an aesthetic appearance, by and revealing an irregular feeling and further emphasizing a three-dimensional pattern and a three-dimensional shape.SOLUTION: An outer wall painting method of the present invention desirably forms a mold with a coating film by forming a resin coating film (5) on a surface of a mold (4) of resin foam, forms an outer wall unit (8) by painting a finish coating material (7) from a surface of a decorative painting surface (6) by applying decorative painting to a surface of the mold with the coating film, fixes the outer wall unit (8) to an outer wall (9) of a building, seals the periphery by a sealant (16), paints a finish coating material (18) on a surface of the sealant (16), forms a natural stone-like wall surface (17) by applying paint including an aggregate in an unmixed multicolor shape on the outer wall except for the outer wall unit (8), and applies the finish coating material (18) also on this surface.

Description

  The present invention relates to an outer wall coating method having a shape in which an outer wall of a building partially protrudes.

  Surfaces such as wall surfaces of buildings are constructed by attaching natural stones, thin metal plates, tiles, etc., quasi-natural stone patterns, spray painting, etc. from the viewpoint of beauty and protection of the main body . Conventionally, as a method of attaching a pattern or the like to the surface of a wall surface or the like of a building, for example, there is a method of applying a lysine-based (compound containing aggregate) and a paint-based material by a trowel coating method, a roller coating method, or the like. is there. The troweling method is a method in which a material is transferred to the surface of a building using a trowel and extended. The roller coating method is a method in which a material is transferred to the surface of a building using a roller or a trowel and extended by a roller. Since these are performed manually, a large pattern can be applied, but they are not suitable for thick coating or large area coating.

  For this reason, the method of coating by using a compressed air and spraying a spraying material from a spray gun etc. is proposed (patent document 1). In this spray coating method, appropriately pulverized natural stones are mixed in a synthetic resin, and multiple types of mixed materials of different colors are prepared in separate tanks in a single spray gun. The mixed material is sprayed simultaneously from separate spray ports of a multi-head spray gun having a plurality of spray ports, and is applied in an unmixed multicolored state. As the non-contamination finish of the painted surface, the present inventors have proposed a coating method for 40 years in the following Patent Document 2 and the like by using a topcoat material containing a siloxane cross-linked acrylic-silicon polymer.

Japanese Patent Publication No. 5-9587 JP 2009-264011 A

  However, in the conventional technique, although the outer wall surface of the building is similar to natural stone, there is little unevenness and it is difficult to express a three-dimensional pattern or shape.

  In order to solve the above-described conventional problems, the present invention provides a method for painting an outer wall that expresses unevenness, emphasizes a three-dimensional pattern or a three-dimensional shape, has a high aesthetic appearance, and is long-term maintenance-free.

  The outer wall coating method of the present invention is a method for coating an outer wall of a building, wherein a resin film is formed on the surface of a molded body of a resin foam to form a molded body with a film, and a decorative coating is applied to the surface of the molded body with the film. Applying a top coating material from the surface of the decorative coating surface to form an outer wall unit, fixing the outer wall unit to the outer wall of the building, sealing the periphery with a sealing material, and coating the top coating material on the surface of the sealing material It is characterized by.

  The present invention uses a resin foam as a molded body at a factory in advance, forms a resin film on the surface, and forms an outer wall unit by applying a decorative coating and a top coating material on the surface. Is fixed to the outer wall of the building, the periphery is sealed with a sealing material, and a top coat is applied to the surface of the sealing material. As a result, a feeling of unevenness can be expressed, and a three-dimensional pattern or a three-dimensional shape can be emphasized more, and a highly beautiful exterior wall coating method can be provided. In addition, it can be a maintenance-free outer wall for a long time.

FIG. 1 is a schematic perspective view of a resin foam molded body for an outer wall unit of Example 1 of the present invention. FIG. 2 is a schematic perspective view of another resin foam molded body for an outer wall unit. FIG. 3 is a schematic perspective view of another resin foam molded body for an outer wall unit. FIG. 4 is a schematic cross-sectional view of the outer wall unit according to the first embodiment of the present invention. FIG. 5A is a perspective view of an attachment for attaching the outer wall unit to the outer wall, and FIG. 5B is a perspective view of a state in which an adhesive is attached to the attachment. FIG. 6 is a schematic cross-sectional view showing a state where the outer wall unit is fixed to the outer wall of the building and finish-coated. FIG. 7 is a perspective view showing a state where the outer wall unit is fixed to the outer wall of the building and finished. FIG. 8 is a graph showing an ultraviolet transmission test of the outer wall unit of Example 1 of the present invention.

  The outer wall unit of the present invention uses a molded body of a resin foam. The molded body may be molded by a mold, but may be formed by means such as cutting or bonding using a tool such as a blade or a hot wire cutter. Since cutting can be made by using 3D computer-aided design (3D-CAD) and an NC lathe, it is possible to select a design that matches the customer's wishes for the outer wall of the building. The shape of the resin foam molding can be various shapes such as a natural stone, fish, boat, airplane, vegetable, fruit, bill, coin, etc. in addition to a round shape, a polygonal shape, a star shape, a heart shape and the like. You can also design the image of the building owner or business entity.

  A resin film is formed on the surface of the molded body. The resin film functions as a protective film. The resin film may be applied as a coating liquid and dried and / or cured. The resin film is preferably formed by coating a solventless polyurea resin and drying. For example, a solvent-free polyurea resin coating is applied to a resin foam molding by dipping (immersion), roller coating, brush coating, spraying, or the like, and reaction solidified to form a resin coating. The thickness of the resin coating is preferably 0.5 to 5 mm, more preferably 1 to 3 mm. The resin film is formed on the surface of the molded body to improve the strength, waterproofness and surface smoothness of the resin foam to improve the handleability and aesthetics, as well as the adhesion to the surface cosmetic paint and the adhesion to the wall. There is an advantage to improve.

  A decorative coating that becomes the outer wall of the building is applied to the surface of the molded body with the coating to form an outer wall unit. For example, the decorative coating may be a natural stone-like wall surface by applying an unmixed multicolored coating material that includes aggregate and synthetic resin and may include inorganic powder. As another example, a paint containing a colorant is applied in a thick coat. The coating thickness is preferably 1 to 10 mm in terms of dry thickness. After the decorative paint is dried, it is fixed to the outer wall of the building, and then the top coat material is overcoated from the surface of the decorative coating surface of the fixed outer wall unit. As a result, it is possible to maintain a beautiful appearance for a long time. The building may be a new construction or a renovation of an existing building. The natural stone wall surface and top coating will be described in detail later.

It is preferable that the resin foam used as the base material of the outer wall unit is at least one selected from polystyrene, polypropylene, polyurethane, and a mixture thereof. These resins are lightweight, and are difficult to peel off and fall off even when attached to the outer wall of a building. Polystyrene foam is particularly preferable. In the case of polystyrene foam, the expansion ratio is preferably 10 to 70 times, more preferably 15 to 60 times, and more preferably 20 to 50 times. The specific gravity is preferably 0.01 to 0.1 g / m ³ , more preferably 0.02 to 0.09 g / m ³ . Various transfer surfaces can be formed on the surface of the resin foam. It is preferable that a skin layer having almost no bubbles is formed on the transfer surface because excellent surface smoothness can be obtained.

  A known flame retardant can be added to the foamed resin. For example, tris (2,3-dibromopropyl) isocyanurate, tetrabromocyclooctane, hexabromocyclododecane, decabromodiphenyl ether, tribromophenyl allyl ether, tetrabromobisphenol A diallyl ether, tetrabromobisphenol A dipropyl ether, tetra Brominated flame retardants such as bromobisphenol A diglycidyl ether, tetrabromobisphenol A di (hydroxyethyl) ether, tetrabromobisphenol A bis (2,3-dibromopropyl ether); chlorinated paraffin, triphenyl chloride, diphenyl chloride, park Chlorine flame retardants such as lorpentacyclodecane; chlorine bromine-containing flames such as 1,2-dibromo-3-chloropropane and 2-chloro-1,2,3,4-tetrabromobutane Agents, and the like can be added.

  A flame retardant may use only 1 type and may use it in combination of multiple types. In the present invention, it is preferable to use tris (2,3-dibromopropyl) isocyanurate as a main component because desired flame retardancy can be easily obtained. In the present invention, the main component means preferably 80 parts by mass or more, more preferably 90 parts by mass or more, with respect to 100 parts by mass in total of the flame retardant.

  The flame retardant is added at a ratio of 2 to 4 parts by mass, preferably 2.2 to 3.8 parts by mass, and more preferably 2.5 to 3.5 parts by mass with respect to 100 parts by mass of the resin component. If it is the said range, the flame retardance of a foaming molding can be maintained high. A known flame retardant aid can be added together with the flame retardant. Since the outer wall unit of the present invention is used for an outer wall of a building, it is preferably flame retardant.

  When fixing the outer wall unit to the outer wall of the building, the outer wall unit and the outer wall of the building are fixed with an adhesive or an adhesive and a hook, and the periphery of the outer wall unit is sealed with a sealing material. preferable. Since the outer wall unit is formed of a resin foam and has a low specific gravity, it can be firmly attached with an adhesive. To fix it more firmly, fix it with an adhesive and a hook. As the adhesive, known ones such as epoxy and acrylic can be used.

  The sealing material is preferably a moisture curable urethane composition containing a urethane prepolymer as a plasticizer. This sealant is a one-component sealant. This sealing material is the same as that filled in the joint, and will be described later.

The topcoat material of the present invention contains the following A liquid and B liquid.
[Liquid A]
(1) Fluororesin containing a copolymer of fluoroolefin and alkyl vinyl ether (2) As a hydrophilicity-imparting agent, a silane compound containing a silanol group by hydrolysis of an alkoxyl group, a photocatalytic titanium oxide, an alkali silicate inorganic coating material, At least one substance selected from metal alkoxide-based inorganic materials (3) UV absorber (4) Solvent [Liquid B]
(1) Curing agent (2) Solvent The A liquid and the B liquid are mixed to form a top coat material, and roller coating is performed. The mixing ratio of the A liquid and the B liquid is preferably A liquid: B liquid = 70 to 95:30 to 5, more preferably A liquid: B liquid = 75 to 90:10 to 25, particularly preferably. Is A liquid: B liquid = 80-85: 20-15.

The fluoroolefin of the fluororesin (A) component is preferably selected from tetrafluoroethylene and chlorotrifluoroethylene, but can also be used in combination. The copolymerization ratio of the fluororesin is preferably 30 to 70 mol%. The alkyl vinyl ether monomer is preferably a hydroxyl group-containing long-chain alkyl vinyl ether represented by CH ₂ = CRO (CH ₂ ) _n OH (R is H or CH ₃ , n is an integer of 7 to 18). The copolymerization ratio of the alkyl vinyl ether monomer is preferably 5 to 50 mol%. In addition to the two components, a copolymerizable vinyl monomer may be copolymerized. Furthermore, it contains a curing agent (D) having a functional group that reacts with a hydroxyl group, and (A) component is 50 to 95% by weight, and (D) component is 5 to It is preferable to contain in the ratio of 50 weight%.

  The (D) component curing agent is added to keep the strength and durability of the coating film high. This curing agent is preferably a room temperature curing type such as polyvalent isocyanates. As the polyvalent isocyanate, non-yellowing diisocyanates such as hexamethylene diisocyanate and isophorone diisocyanate and adducts thereof are particularly useful. When normal temperature curing is performed using isocyanates, curing can be accelerated by adding a curing catalyst such as dibutyltin dilaurate. (D) It can harden at normal temperature (about 0-40 degreeC) with the hardening | curing agent of a component.

  The hydrophilicity-imparting agent of component (B) imparts hydrophilicity to the top coat (topcoat) film, and is washed away with water such as rain to mix the components so as to always maintain a beautiful appearance. This hydrophilicity imparting agent uses at least one substance selected from a silane compound containing a silanol group obtained by hydrolysis of an alkoxyl group, a photocatalytic titanium oxide, an alkali silicate inorganic coating material, and a metal alkoxide inorganic material. Of these, it is more preferable to use a silane compound containing a silanol group obtained by hydrolysis of an alkoxyl group. As the silane compound, a silane compound having a functional group selected from an average of two or more alkoxysilyl groups, silanol groups and acyloxysilyl groups in one molecule is suitably employed. Such silane compounds are commercially available under names such as silane coupling agents, silane curing agents, silicone curing agents, alkoxysilanes, and silane alkoxides. The hydrophilicity-imparting agent is preferably added in an amount of 5 to 50 parts by weight based on 100 parts by weight of the total amount of the component (A) and the component (D).

  Component (C), an ultraviolet absorber, is added to absorb ultraviolet rays and prevent photodegradation of the coating. As an example, there is a benzotriazole-based compound (BASF (formerly Ciba Geigy), trade name “Tinuvin 900”). A light stabilizer (manufactured by the company, trade name “TINUVIN 144”) and / or a surface conditioner (manufactured by BYK Chemie, trade name “BYK300”) can also be used in combination with the ultraviolet absorber. The ultraviolet absorber is preferably added in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the total amount of the component (A) and the component (D).

  The solvent of component (E) is added to adjust the viscosity of the top coat and facilitate roller coating. Solvents are toluene, xylene, pentane, hexane, heptane, nonane, cyclohexane, Solvesso # 100 (manufactured by Exxon), Solvesso # 150 (manufactured by Exxon), Swazol # 1000 (manufactured by Maruzen Petrochemical Co., Ltd.), Swazol # 1500 (Maruzen) Petrochemical), Swazol # 1800 (Maruzen Petrochemical), methanol, ethanol, propanol, butanol, isobutanol, ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, diacetone alcohol, methyl cellosolve, cellosolve, butyl cellosolve , Cellosolve acetate, ethyl acetate, butyl acetate, isobutyl acetate, benzene, methyl ethyl ketone, methyl isobutyl ketone, isophorone, cyclohexanone, Ethylbenzene, 1,3,5-trimethylbenzene, and the like high boiling aromatic naphtha. These solvents may be appropriately mixed and used. The solvent is preferably added in an amount of 30 to 200 parts by weight based on 100 parts by weight of the total amount of the components (A) and (D).

  The top coating material is commercially available from Toupe under the trade name “New Garmet DC # 500”. This paint is used for roller coating. The advantage of roller coating is that even if there are irregularities on the outer wall surface, it can be applied with a uniform film thickness, there is no coating unevenness, no air bubbles are included, and the coating efficiency is high. It is especially effective for the outer wall by spray painting. After coating, it is cured at room temperature (about 0 to 40 ° C).

  A joint exists in the outer wall of the present invention, and the joint contains a urethane prepolymer as a plasticizer and is filled with a moisture-curable urethane composition that does not contain a bleed-out component as a one-component sealant, It is preferable to coat the top coat material on the outer wall including the joint. Thereby, a joint can also be protected similarly to an outer wall, and a useful life can be extended. This joint material is a one-component sealing material using a urethane prepolymer obtained by reacting a (meth) acrylic compound having 1 to 3 hydroxyl groups in the molecule or an oligomer thereof, a polyol and an organic polyisocyanate compound as a plasticizer. It is. This sealant is commercially available as a product name “Auton Super Sealer TF2000” manufactured by Auto Chemical Industry Co., Ltd.

  In a conventional general sealing material, a base polymer such as modified silicone has been added with a component that easily bleeds out such as silicone oil as a plasticizer. When the plasticizer bleeds out from the sealing material, there is a problem that the bleed-out component stains the outer wall, or there is a problem of causing joint leakage and causing water leakage. The present invention is significant when a specific material is selected from a number of sealing materials.

  The outer wall other than the outer wall unit of the present invention is preferably a natural stone-like wall surface that is sprayed and coated in an unmixed multicolored form with an application material that contains aggregate and synthetic resin and may contain inorganic powder. In general, there are many tile outer walls in buildings, but the tile outer walls have a problem that the tiles are easy to peel off due to the large difference in thermal expansion between the tiles (ceramics) and concrete, every 10 to 15 years Maintenance repair was necessary. In contrast, natural stone-like wall surfaces do not have such problems, and long-term maintenance-free can be achieved if the problem of surface contamination can be solved. The present invention is significant in solving the problem of surface contamination.

  The natural stone-like wall surface uses an application material that contains aggregate and synthetic resin and may contain inorganic powder. In the above, the aggregate is a natural stone, a baked aggregate obtained by adding a pigment to natural stone, ceramic, bricks, ceramics, steel slag, etc., and sieved to an average particle size of about 0.1 to 5 mm. It refers to arranged particles. Synthetic resins are resins having high light resistance such as acrylic emulsion paints and urethane paints, which become matrix resins when applied to a painted surface. In the present invention, since the synthetic resin is used for the matrix resin, the painted surface is not destroyed even when subjected to vibration such as an earthquake. For this reason, compared with tiles, bricks, natural stones, etc., the risk of falling during an earthquake is extremely low. The inorganic powder is a mineral powder existing in nature such as silica, talc and clay, and is prepared by sieving into finer average particles than the aggregate. Other thickeners, pH adjusters, antifoaming agents, film-forming aids, water and / or solvents may be added to the coating material.

  The coating material that contains aggregate, synthetic resin, water and / or solvent, and may contain inorganic powder, is made into a non-mixed multicolored form on the building wall or the panel that becomes the wall using a multi-head spray gun. Apply. The multi-head spray gun uses, for example, a coating gun disclosed in Patent Document 1 or Japanese Patent Publication No. 6-61494. This multi-head spray gun can apply a multicolor coating material as a bullet with compressed air separately from different tanks, and the painted surface is applied in a non-mixed multicolored form to form a natural stone tone. Since the surface of the painted surface includes an uneven portion, at least a part of the convex portion (projecting portion) is formed into a flat shape by polishing or grinding. The polished or ground surface is preferably 5 to 50% of the whole. If it does in this way, it will become a so-called burner finish surface of natural stone. Burner finish is a surface of natural stone such as marble or granite that is watered and heated with a flame burner to cause rapid expansion of the surface of the stone and crush it, roughing the surface to a fine uneven surface. Is the method.

  In the present invention, the top coat material is preferably applied twice. As a result, the top coating material (top coat) can be applied evenly, and maintenance-free can be achieved for a long time. Further, it is preferable that the top coating material is further coated with a solvent to adjust the viscosity to 35 to 55 centipoise (23 ° C., BL type, rotation speed 60 rpm). As a result, coating can be performed with a uniform film thickness, and the coating efficiency is improved.

The coating amount of the top coating material is preferably in the range of 50 to 200 g / m ² and more preferably in the range of 80 to 150 g / m ² in terms of the solid content after drying. Thereby, long-term maintenance-free can be achieved.

  Hereinafter, the present invention will be described more specifically with reference to examples. In addition, this invention is not limited to the following Example.

(Measurement test method for each characteristic)
(1) Accelerated weather resistance test with sunshine weather meter
(a) Testing machine: Model number “WE-SUN-HC-DC” manufactured by Suga Test Instruments Co., Ltd.
(b) Light source: 1 lamp type, cerium-filled cored carbon combined with 4 each
(c) Light wavelength: 280-400 nm
(d) Irradiance: 255 ± 45 W / m ² with filter, 285 ± 50 W / m ² without filter
(e) Optical filter: Heat-resistant optical glass plate used. 1 set of 8 cuts short wavelength components of 255 nm or less, 3 (f) 10-50% transmission of components up to 55 nm
(g) Emission power: 50V, 60A (3000W)
(h) Atmospheric temperature: 63 ± 3 ° C
(i) Shower: Driving for 18 minutes during 120 minutes
(j) Spray water amount: 2100 ± 100 ml / min (pH 6.0 to 8.0, water temperature 16 ± 5 ° C.)
(k) Number of samples: 70 × 150 mm, 76
(l) Operation cycle: 60 hours
(2) Gloss The outer wall and the surface of the outer wall unit after the accelerated test by the sunshine weather meter were visually observed and evaluated as follows.
A: unchanged from the original B: inferior to the original gloss (3) presence or absence of cracks The surface of the outer wall and the outer wall unit after the accelerated test by the sunshine weather meter was visually observed and evaluated as follows.
A: No crack B: Slightly cracked, repair required C: Large crack, repair required (4) Discoloration The outer wall and the outer wall unit surface after the accelerated test by the sunshine weather meter were visually observed and evaluated as follows. did.
A: No discoloration B: Discoloration but inconspicuous to the extent that there is no practical problem, no repair needed C: Some noticeable discoloration, repair required D: Clearly discolored, repair required

(Example 1)
1. External Wall Unit (1) Resin Foam Molded Body with Resin Film Cut resin foam molded body shown in FIG. 1 (Styrofoam, specific gravity 0.02 g / cm ³ , vertical and horizontal 450 mm, height 86 mm, center bottom height 30 mm , Tris (2,3-dibromopropyl) isocyanurate as a flame retardant, 2 parts by weight added to 100 parts by weight of the resin component), solvent-free polyurea resin (made by Daiflex Co., Ltd.) Trade name “Regtect 5000”) was dipped and cured to cover a dry thickness of 1-2 mm. Thus, a resin foam molded article 1 with a resin coating was obtained. Similarly, a resin foam molded body 2 with a resin film in FIG. 2 and a resin foam molded body 3 with a resin film in FIG. 3 were also prepared.

(2) Cosmetic coating The following aggregated spray coating was applied to the surfaces of the resin foams 1 to 3 except for the back surfaces.
(A) Aggregate 61.60 parts by weight
(B) Acrylic emulsion (solid content 50%) 25.20 parts by weight
(C) Thickener (hydroxymethylcellulose) 11.35 parts by weight
(D) pH adjuster (ammonia water) 0.17 parts by weight
(E) Defoamer (alcohol) 0.03 parts by weight
(F) Film-forming aid (alcohol) 0.39 parts by weight
(G) 1.26 parts by weight of water

  For workability and storage convenience, thickeners, pH adjusters, antifoaming agents, film-forming aids and the like are mixed. Here, the film-forming aid is for lowering the temperature of the transparent film-forming of the emulsion. As for the aggregate, white aggregate is a mixture of natural stones such as cryolite, black is a mixture of natural stones such as obsidian, and gray is a mixture of cryogenic stones and obsidian. used. The particle size distribution of the aggregate can be freely selected depending on the expression of the pattern of the wall covering material for buildings. From the strength and aesthetic appearance, the particle size distribution shown in the following Table 1 was adopted. In Table 1, mesh means the number of meshes per inch (25.4 mm). Various aggregate colors can be used depending on the purpose, and various aggregates such as baked aggregate and ceramics can be used.

  Spray painting was performed using a three-head spray gun. The three-head spray gun is provided with three tanks, and the entire upper part of the tank is rectangular (cuboid shape). The first to third spray materials having different colors are accommodated separately in each tank. Further, the lower part of the tank is tapered, and an injection nozzle is separately provided at the lowermost part. The first to third spray materials in the tank are each ejected in a bullet shape from the spray nozzle by compressed air. The diameters of the spray nozzles are 12 mm, 10 mm, and 6 mm, respectively, and the discharge ratio of the first spray material (white), the second spray material (gray), and the third spray material (black) is 5: 4: 1. It is. This three-head spray gun has a handle on the side of the nozzle, and this handle moves compressed air from a high pressure state (2.0 atm) to a low pressure state (1.0 atm) (and from the low pressure state). A changeover switch is provided for switching to a high pressure state. After spray painting, it was dried and the convex part was polished as necessary. In this way, natural stone-like spray painting was applied.

(3) Top coating A top coat (top coating material) was applied on the obtained natural stone-like spray coating. The top coating was performed twice using a roller coating tool. Each top coat was cured at room temperature (25 ° C.) for 24 hours. The top coat material is a product name “New Garmet DC # 500” manufactured by Toupe Co., Ltd., and A liquid and B liquid are mixed at a weight ratio of A liquid: B liquid = 83: 17. 15 parts by weight of a mixed solvent of 24 parts by weight of ethylbenzene, 5 parts by weight of 1,3,5-trimethylbenzene, 38 parts by weight of toluene, 24 parts by weight of xylene, and 9 parts by weight of high-boiling aromatic naphtha are added to a total of 50 parts by weight. The centipoise (23 ° C., BL type, rotation speed: 60 rpm) was adjusted, and the coating amount was 100 g / m ^{2 in} terms of solid content after drying. The obtained coated product was confirmed to be durable and free from cracks and cracks up to 10,000 hours (equivalent to 50 years) in an accelerated test using a sunshine weather meter. There was no bleed-out stain from the sealing material. Further, in the ultraviolet transmission test, as shown in FIG. 8, 99% of 320 to 380 nm ultraviolet rays were cut, and the transmission portion was 1%. Thus, the outer wall unit 8 shown in FIG. 4 was produced. In the outer wall unit 8, the resin film 2 is formed on the surface of the resin foam molded body 1, and the decorative layer 6 and the overcoat layer 7 are formed on the surface. In this state, the protective sheet was covered except for the back surface.

(4) Attachment and Finishing of Outer Wall Unit As shown in FIG. 5A, an attachment tool 11 having hooks (claws) 12 is fixed to the outer wall 9 having joints 10 with screws 13. As shown in FIG. 5B, an epoxy adhesive 14 was applied to the hook 12. Next, as shown in FIG. 6, the epoxy adhesive was apply | coated to the whole back surface of the outer wall unit 8, and the outer wall unit 8 was affixed on the outer wall 9 of a building. Reference numeral 15 denotes an adhesive layer. A sealing material 16 was filled around the outer wall unit 8. As the sealing material 16, a commercial name “Auton Super Sealer TF2000” (hereinafter also referred to as “urethane composition”) manufactured by Auto Chemical Industry Co., Ltd., which is a one-component type, was used. This prevented rainwater from entering the adhesive layer 15. Since this sealant 16 does not contain a plasticizer that bleeds out, the outer wall is not soiled, cracks do not occur, and water leakage or water intrusion does not occur. After that, the natural stone-like spray painting of a color different from the natural stone-like spray painting is applied to the portion other than the outer wall unit 8 to form a spray painting layer (natural stone-like wall surface) 17 and the protective sheet of the outer wall unit 8 is removed. It was. The joint portion was filled with the same sealing material filled around the outer wall unit. Next, the spray coating layer (natural stone-like wall surface) 17 and the top coat layer 18 used for the outer wall unit were applied twice by roller coating from the joints. In this way, the outer wall painted surface shown in FIG. 6 was obtained.

  FIG. 7 is an external view showing a finished state after the outer wall units 8a to 8c are attached to the outer wall 9 of the building 19 and the top coat is applied. It was confirmed that the outer wall units 8a to 8c had an appearance protruding from the other outer wall portions 9, had an uneven feeling, a three-dimensional pattern and a three-dimensional shape were emphasized, and a highly beautiful outer wall coating method.

  The present invention is suitable for outer walls of general buildings, buildings, condominiums, factories, offices and the like. Particularly, large-scale repair work every 10 to 15 years that is normally performed in an apartment house (apartment) can be greatly extended, and the repair management cost can be greatly reduced.

1, 2, 3 Resin foam molding with resin coating 4 Resin foam molding 5 Resin coating 6 Cosmetic coating layer 7 Top coating layer 8, 8a to 8c Outer wall unit 9 Outer wall 10 Joint 11 Attachment 12 Hook (nail)
13 Screw 14 Adhesive 15 Adhesive layer 16 Sealing material 17 Spray coating layer (natural stone-like wall surface)
18 Topcoat 19 Building

Claims (11)

A method for painting an outer wall of a building,
A resin film is formed on the surface of the molded body of the resin foam to form a molded body with a film, and a decorative coating is applied to the surface of the molded body with the film,
A top coat material is applied from the surface of the decorative coating surface to form an outer wall unit,
The outer wall unit is fixed to the outer wall of the building, and the periphery is sealed with a sealing material,
An outer wall coating method, wherein a top coat material is coated on the surface of the sealing material.   The outer wall coating method according to claim 1, wherein the resin foam is at least one selected from polystyrene, polypropylene, polyurethane, and a mixture thereof.   The outer wall coating method according to claim 1 or 2, wherein the resin coating on the surface of the molded body is a solventless polyurea resin.   The outer wall coating method according to any one of claims 1 to 3, wherein, when the outer wall unit is fixed to an outer wall of a building, the outer wall unit and the outer wall of the building are fixed with an adhesive or an adhesive and a hook. .   The outer wall coating method according to claim 1, wherein the sealant is a moisture curable urethane composition containing a urethane prepolymer as a plasticizer.   The said outer wall and / or the said decorative painting are aggregated and synthetic resin, apply | coat the coating material which may also contain inorganic powder in a non-mixed multicolor form, and make it a natural stone-like wall surface. The exterior wall coating method described in 1.   The outer wall coating method according to claim 6, wherein a top coating material is also applied on a natural stone-like wall surface of the outer wall. The top coating material includes the following A liquid and B liquid,
[Liquid A]
(1) Fluororesin containing a copolymer of fluoroolefin and alkyl vinyl ether (2) As a hydrophilicity-imparting agent, a silane compound containing a silanol group by hydrolysis of an alkoxyl group, a photocatalytic titanium oxide, an alkali silicate inorganic coating material, At least one substance selected from metal alkoxide-based inorganic materials (3) UV absorber (4) Solvent [Liquid B]
(1) Curing agent (2) Solvent The outer wall coating method according to any one of claims 1 to 7, wherein the liquid A and the liquid B are mixed to form a top coating material.   The outer wall coating method according to claim 1, wherein the top coat material is applied twice.   The outer wall coating method according to any one of claims 1 to 9, wherein a solvent is further added to the top coat material to adjust the viscosity to 35 to 55 centipoise (23 ° C, BL type, rotation speed 60 rpm). 11. The outer wall coating method according to claim 1, wherein a coating amount of the top coating material is in a range of 50 to 200 g / m ² in terms of solid content after drying.

Images