JP5748375B1 - Exterior wall painting method - Google Patents

Abstract

An outer wall coating method capable of expressing a vivid appearance and a flashy appearance, maintaining a beautiful appearance for a long time, requiring no maintenance, and having a long service life. The exterior wall painting method of the present invention is a exterior wall painting method for a building, in which a color metal decorative plate (35) is applied to a part of a wall surface (17) spray-coated with an application material containing aggregate and synthetic resin. A moisture curable urethane composition containing a urethane prepolymer as a plasticizer is filled around the color metal decorative plate (35) as a sealing material (37), and the wall surface (17) and the color metal decorative plate (35) are filled. Apply topcoat from the surface. [Selection] Figure 8

Description

  The present invention relates to an outer wall coating method in which a color metal plate is attached to an outer wall of a building.

  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, the conventional technique described above is a method for painting an outer wall, in which a change in the outer wall surface of a building is scarce, it is difficult to express a vivid appearance or a flashy appearance, a beautiful appearance is maintained for a long time, and maintenance is not required. Was difficult.

  In order to solve the above-mentioned conventional problems, the present invention provides an outer wall coating method capable of expressing a vivid appearance or a flashy appearance, maintaining a beautiful appearance for a long period of time, and requiring a long service life without requiring maintenance.

  The outer wall painting method of the present invention is a method for painting an outer wall of a building, wherein a color metal decorative plate is attached to a part of a wall surface that has been coated by spraying a coating material containing aggregate and synthetic resin. A moisture curable urethane composition containing a urethane prepolymer as a plasticizer is filled as a sealing material, and a top coating material is applied from the surface of the wall surface and the color metal decorative plate.

  The present invention attaches a color metal decorative board to a part of the wall surface of a spray-painted building, and fills the periphery of the color metal decorative board with a moisture curable urethane composition containing a urethane prepolymer as a plasticizer as a sealing material, A top coat material is applied from the wall surface and the surface of the color metal decorative plate. As a result, it is possible to provide a method for painting an outer wall that can express a partially bright appearance or a flashy appearance, maintains a beautiful appearance for a long period of time, requires no maintenance, and has a long service life.

FIG. 1A is a schematic plan view of a lower metal plate of a color metal decorative plate in one embodiment of the present invention, and FIG. 1B is a left side view thereof. 2A is a schematic plan view of an upper metal plate of the color metal decorative plate, and FIG. 2B is a right side view thereof. FIG. 3 is a side view of a color metal decorative plate in which an upper metal plate is combined with a lower metal plate. FIG. 4 is a perspective view showing a three-head spray gun used in the spray coating method according to an embodiment of the present invention. FIG. 5 is an explanatory view showing the spray coating method. FIG. 6A is an enlarged sectional view of the spray coating layer before polishing, and FIG. 6B is an enlarged sectional view of the coating layer after polishing. FIG. 7 is a schematic cross-sectional view of the state in which the color metal decorative plate is fixed to the outer wall of the building. FIG. 8 is a schematic cross-sectional view in which a top coat material is applied. FIG. 9 is a front view of the same. FIG. 10 is a graph showing an ultraviolet transmission test of Example 1 of the present invention. FIG. 11 is a schematic cross-sectional view showing a finished state of another embodiment of the present invention.

  In the present invention, a color metal decorative plate is attached to a part of a wall surface of a spray-painted building. The wall surface of spray coating has various things such as natural stone tone or uniform color system, and is generally uniform, but by attaching a color metal decorative plate, it is possible to express a partially vivid appearance or flashy appearance.

It is preferable to use a stainless steel plate, an aluminum plate or the like as the color metal decorative plate. Stainless steel plates are preferred because they have high corrosion resistance and are stable for a long time. The stainless steel plate is formed into various shapes by press working or the like, and is color-decorated by any means selected from vapor deposition, sputtering, ion plating and plating. The color decoration is preferably a metal color such as gold or silver taking advantage of the characteristics of the metal. For example, in the case of stainless steel SUS304, the thickness of the color metal decorative plate is preferably 0.2 to 1.2 mm, and more preferably 0.3 to 1.0 mm. The shape can be various shapes such as circles, ellipses, ellipses, etc., triangles, quadrilateral polygons, stars, hearts, etc., fish, boats, airplanes, vegetables, fruits, bills, coins, etc. . You can also design the image of the building owner or business entity.
The surface may be a flat shape, an uneven shape, a protruding shape, or the like. This color metal decorative plate can be attached to any part of the wall surface. Above all, it is preferable to attach it to a part of the joint because the beauty effect is large.

  The color metal decorative plate includes a lower metal plate and an upper metal plate, and the upper metal plate is preferably formed relatively larger than the lower metal plate. Thus, when the upper metal plate is mounted on the lower metal plate, the upper metal plate is visible on the surface, and the lower metal plate is hidden under the upper metal plate so that it cannot be seen. The surface side of the upper metal plate is a color-decorated metal plate.

  Preferably, the lower metal plate is fixed to a wall surface or a joint, and the lower metal plate and the upper metal plate are fixed by a locking portion that locks each other. As an example, the lower metal plate is formed with a flat portion at the center portion, a bent portion in the vertical direction at the end, and a hole for inserting and fixing a fixing pin in the central portion, and the upper metal plate at the bent portion. A locking portion that locks with the locking portion of the plate is formed. An example of the locking portion is a locking claw. The upper metal plate has a flat portion at the center portion and a bent portion in the vertical direction at the end, and a locking portion is formed in the bent portion. By fixing the lower metal plate by hitting a fixing pin from the fixing hole of the lower metal plate to the joint of the outer wall, and hooking the locking portion of the upper metal plate on the locking portion of the lower metal plate from above , Fix the color metal decorative board.

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. This sealing material is also filled around the color metal decorative plate. Accordingly, rainwater or the like does not enter the attachment portion of the color metal decorative plate, and the wall surface and the color metal decorative plate can be held stably for a long period of time.

  The wall surface of the present invention is a wall surface that is spray-coated with an application material containing aggregate and synthetic resin. This wall surface may be a one-color blown wall surface using a ricin gun or the like, or a multi-color blown wall surface. Preferably, it is a natural stone-like wall surface that is coated with an unmixed multicolor coating material that includes aggregate and synthetic resin and may include 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. On the other hand, the sprayed wall surface is preferable because there is no peeling problem.

  In the present invention, a coating material that preferably contains an aggregate and a synthetic resin and may contain an inorganic powder is used. 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. In the following drawings, the same symbols indicate the same items.

(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 (including joints) and the surface of the color metal decorative plate after the acceleration test by the sunshine weather meter were visually observed and evaluated as follows.
A: No change from the original B: Inferior to the original gloss (3) Presence or absence of cracks The outer wall (including joints) and the surface of the color metal decorative plate after the accelerated test by the sunshine weather meter were visually observed, as follows: evaluated.
A: No crack B: Slightly cracked, repair required C: Large crack, repair required (4) Discoloration Visual observation of the outer wall (including joints) and the surface of the color metal decorative plate after the accelerated test by the sunshine weather meter Observed and evaluated as follows.
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) Creation of a color metal decorative board The color metal decorative board shown in FIGS. 1-3 was produced by press work. The lower metal plate 30 shown in FIGS. 1A and 1B is a stainless steel SUS304 plate having a thickness of 0.5 mm, and has a vertical and horizontal length of 148.4 mm, and a bent portion height of 8.5 mm. A fixed pin mounting hole 31 having a diameter of 6.8 mm was formed in the flat portion at the center, and eight locking portions 32 were provided in the bent portion. The upper metal plate 33 shown in FIGS. 2A and 2B is a colored stainless steel SUS304 plate having a thickness of 0.8 mm, and has a length and width of 150.0 mm each, and a height of the bent portion at the end is 2.35 mm. Eight engaging portions 34 were provided in the bent portion. The upper metal plate 33 is colored gold by vapor deposition. FIG. 3 is a side view of a color metal decorative plate 35 in which the lower metal plate 30 and the upper metal plate 33 are combined. The locking part 32 and the locking part 34 are locked and fixed to each other.

(2) Spray painting As the spray material, the one prepared in the following components was used.
(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) Water 1.26 parts by weight Thickeners, pH adjusters, antifoaming agents, film-forming aids and the like are mixed for workability and storage convenience. 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.

  FIG. 4 is a perspective view showing a three-head spray gun used in the spray coating method in one embodiment of the present invention. The three-head spray gun 12 is provided with three tanks 1, 2, and 3, and the entire upper portion of the tank is rectangular (a rectangular parallelepiped shape). The first, second and third spray materials 7, 8 and 9 having different colors are accommodated in the tanks 1, 2 and 3, respectively. Further, the lower portions of the tanks 1, 2, and 3 are tapered, and spray nozzles 4, 5, and 6 are separately provided at the lowermost portions. The first to third spray materials 7, 8, 9 in the tanks 1, 2, 3 are ejected from the spray nozzles 4, 5, 6 in a bullet shape by compressed air. The nozzles 4, 5, and 6 have a diameter of 12 mm, 10 mm, and 6 mm, respectively, and discharge of the first spray material (white) 7, the second spray material (gray) 8, and the third spray material (black) 9. The quantitative ratio is 5: 4: 1. The three-head spray gun 12 has handles 10 and 11 attached to the side of the nozzle. The handles 10 and 11 are supplied with compressed air from a high pressure state (2.0 atm) to a low pressure state (1.0 atm). ) (And a switching switch (not shown) for switching from a low pressure state to a high pressure state).

  FIG. 5 is an explanatory view showing a spray coating method in one embodiment of the present invention. As the building panel 13, a fiber reinforced resin plate having a length of 150 mm, a width of 70 mm, and a thickness of 3 mm was used. On the surface of the building panel 13, a joint dummy material 24 (one obtained by integrating a pressure-sensitive adhesive on the surface of a polyethylene foam sheet) was attached to a joint portion. The jets 14, 15, and 16 ejected in a bullet shape from the jet nozzles 4, 5, and 6, respectively, were applied to the building outer wall panel 13 and dried to obtain a base material layer 17. Even with this base material layer, the coating material was applied in an unmixed multicolored form, and was a natural stone-like wall surface.

  FIG. 6A is an enlarged cross-sectional view of the obtained base material layer 17. The base material layer painted on the building outer wall 13 has a large uneven surface as a whole, and the protrusion 18 was polished by a plate sander along the polishing line arrow 19. FIG. 6B is an enlarged cross-sectional view of the base material layer 17 after polishing. The base material layer 17 became a flat surface portion 20 and a concave portion 21 by polishing, and due to the presence of the flat surface portion 20, the surface shape was close to the burner finish of natural stone. The thickness of the base material layer 17 was about 2 mm.

  As shown in FIG. 6B, the joint dummy material 24 was peeled off, and the sealing material 25 was filled in the groove portion. As the sealing material, a one-component commercial product manufactured by Auto Chemical Industry Co., Ltd., trade name “Auton Super Sealer TF2000” (hereinafter also referred to as “urethane composition”) was used.

  A color metal decorative plate 35 was attached to the obtained wall surface. As shown in FIG. 7, the fixing pin 36 is screwed into the fixing pin mounting hole of the lower metal plate, the lower metal plate is first fixed, and then the upper metal plate is put on the lower metal plate and pushed into each other. It was fixed by locking the locking part. Next, the sealing material 37 was filled around the color metal decorative plate 35.

Thereafter, top coating was performed twice on the surface of the base material layer 17, the sealing materials 25 and 37, and the color metal decorative plate 35 using the roller coating tool 26. The first overcoating was cured at room temperature (25 ° C.) for 24 hours. FIG. 8 is a cross-sectional explanatory view in which the second overcoating is performed on the surface of the substrate layer after polishing. 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. It was adjusted to centipoise (23 ° C., BL type, rotation speed 60 rpm), and the coating amount of the top coating material was 100 g / m ^{2 in} terms of solid content after drying. The obtained natural stone-like coated product 27 was confirmed to be durable without cracks or 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. The results are summarized in Table 2. Moreover, in the ultraviolet-ray transmission test, as shown in FIG. 10, 99% of 320-380 nm ultraviolet rays were cut, and the transmission part was 1%.

(Example 2)
An experiment was conducted in the same manner as in Example 1 except that the top coating material was applied once. The obtained coated product was confirmed to be durable with no cracks or cracks until 9000 hours (equivalent to 45 years) in an accelerated test using a sunshine weather meter. There was no bleed-out stain from the sealing material. The results are summarized in Table 2.

  FIG. 9 is an external view showing a finished state after the color metal decorative plate 35 is attached to the outer wall of the building and the top coat is applied. The base material layer 27 has a natural stone-like pattern such as granite, has a joint 25, and a color metal decorative plate 35 is attached at a position where the joint 25 intersects. The color tone of the color metal decorative plate 35 was gold. It was confirmed that the color metal decorative plate 35 had an appearance protruding from other outer wall portions, had an unevenness, emphasized a three-dimensional pattern and a three-dimensional shape, and was a highly beautiful outer wall coating method.

(Example 3)
FIG. 11 is a schematic cross-sectional view showing a finished state of another embodiment of the present invention. The lower metal plate 39 of the color metal decorative plate is fixed to the wall surface 13 with screws 36, and the upper metal plate 40 is placed thereon and fixed with the fixing claws 41, the sealing material 37 is filled around, and the top coating material 38 is applied. The same procedure as in Example 1 was performed except that the coating was performed. It was confirmed that this color metal decorative board also had an appearance protruding from the other outer wall part, had a feeling of unevenness, emphasized a three-dimensional pattern and a three-dimensional shape, high aesthetics and high durability.

  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 Tank 4, 5, 6 Spray nozzle 7, 8, 9 Spraying material 10, 11 Handle 12 Three-head spray gun 13 Building panel 14, 15, 16 Spray 17 Base material layer 18 Projection 19 Polishing line 20 Plane portion 21 Recess 22 Top coat first layer 23 Top coat second layer 24 Joint dummy material 25 Joint sealant 26 Roller coating tool 27 Natural stone-like paint 30, 39 Lower metal plate 31 Fixing pin attachment holes 32, 34 Stop portions 33, 40 Upper metal plate 35 Color metal decorative plate 36 Fixing pin 37 Sealing material 38 for color metal decorative plate Top coating material 41 Fixed claw

Claims (9)

A method for painting an outer wall of a building,
A color metal decorative plate is attached to a part of the wall surface, which is coated by spraying a coating material containing aggregate and synthetic resin, and a moisture curable urethane composition containing a urethane prepolymer as a plasticizer is sealed around the color metal decorative plate. As filling and
An outer wall coating method, wherein a top coating material is applied from the surfaces of the wall surface and the color metal decorative plate. The color metal decorative plate includes a lower metal plate and an upper metal plate, and the upper metal plate is relatively larger than the lower metal plate,
The surface side of the upper metal plate is a color-decorated metal plate,
The lower metal plate is fixed to the wall surface or joint,
The outer wall coating method according to claim 1, wherein the lower metal plate and the upper metal plate are fixed by a locking portion that locks each other.   3. The exterior wall coating according to claim 1, wherein the color metal decorative plate is made of stainless steel, and the surface side of the upper metal plate is color-decorated by any means selected from vapor deposition, sputtering, ion plating, and plating. Method.   The said color metal decorative board is an outer wall coating method in any one of Claims 1-3 attached to a part of said joint.   The outer wall coating method according to any one of claims 1 to 4, wherein the wall surface is a natural stone-like wall surface that includes an aggregate and a synthetic resin and is spray-coated with an unmixed multicolor coating material that may include an inorganic powder. . 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 5, wherein the liquid A and the liquid B are mixed to obtain a top coating material.   The outer wall coating method according to claim 1, wherein the top coat material is applied twice.   The exterior coating method according to any one of claims 1 to 7, wherein a solvent is further added to the top coating material to adjust the viscosity to 35 to 55 centipoise (23 ° C, BL type, rotation speed 60 rpm). The outer wall coating method according to any one of claims 1 to 8, 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.

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