JPS61242252A - Building exterior finishing method, exterior sheet adhesive and exterior sheet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a building exterior finishing method.

[Conventional technology]

Traditionally, exterior finishes for buildings use paints consisting of pigments, sand, cold water, or other fillers, and cement or resin binders. Such exterior materials are liquid materials, and because they are carried in containers such as buckets and applied to vertical walls, there is a risk that they may drip down during exterior work and contaminate the surrounding area. For this reason, window glass, gutters, etc. must be covered and cured, and the reality is that 70 to 80% of the time for exterior work is spent on curing. It will scatter and cause a lot of trouble to the neighbors.

In this regard, paper wallpaper, heavy wallpaper, vinyl wallpaper, etc. (hereinafter also simply referred to as interior materials in the present invention) do not cause such inconvenience because they are installed by applying an adhesive to the back surface and bonding them to the wall surface. However, water-soluble adhesives such as carboxyl methyl cellulose, methyl cellulose, and polyvinyl alcohol are mainly used as adhesives, and when a high degree of adhesive strength is required, even though they contain resin emulsions, they lack water resistance. Moreover, the interior material is used to cover the dirty wall surface of the construction base and make it look beautiful, and it is made by pasting backing paper to ensure that the condition of the base is hidden to the extent that it does not show on the construction surface. It is not used in rows for exterior materials.

[Problem that the invention seeks to solve]

As mentioned above, when installing interior materials such as paper wrapping, heavy wallpaper, and vinyl wallpaper, there will be no inconveniences such as adhesive scattering or dripping during work, but interior materials may not be water-resistant, light-resistant, etc. In other words, even though the exterior material can be used as an interior material at any time, the emphasis is on external decorativeness (design), and it is not suitable for water resistance, light resistance, etc. Interior materials that do not place emphasis on physical properties cannot be used as exterior materials. Since it is made of paper that is not water resistant and the surface is decorated with paint or fabric, it has almost no water resistance or weather resistance, so even if you try using synthetic paper instead of paper as the base, there is a risk of photothermal embrittlement. In addition, using carbon fiber as a base causes problems such as poor adhesion, and using glass fiber as a base causes problems such as cracking on the surface. No material has been obtained.

Therefore, considering the conventional technology, we found that backing paper, which provides concealment properties to paper wrapping, heavy wallpaper, vinyl wallpaper, etc., is necessary to prevent the adhesive applied during construction from seeping out to the front side. be. However, since the concealing properties of paper-covered paper, heavy wallpaper, vinyl wallpaper, etc. depend on their thickness, the backing paper is pasted to vinyl wallpaper, which has no risk of adhesive oozing out. It is thought that it was made thickly.

Regarding adhesives, the thickness of the adhesive applied during construction is at least 0.4fi, but this will absorb moisture by 90%.
Since it is a water-soluble glue containing 0 to 95%, it dries after application and becomes approximately 0%. On the other hand, the thickness of the backing paper is usually 0.4 mm or less, so if the thickness of the water-soluble glue applied during construction does not change even after drying, it will be hidden by the coating film of the water-soluble glue. Therefore, water-resistant thin vinyl films and the like can be used as interior materials without pasting paper backing.

As mentioned above, conventional adhesives are based on water-soluble glue and are not suitable for installation on bathrooms or walls facing outdoors that require water resistance, but if an organic solvent solution type adhesive is used, this can be avoided. It becomes possible.

However, the organic solvents contained in such adhesives are not only expensive but also harmful to the human body, making them impractical.Also, the adhesive is highly volatile and the initial adhesive strength is too strong, so it is difficult to use interior materials as a base for construction. While the adhesive has not yet dried and the initial adhesion strength is weak, the normal work (manual work) of smoothing out the slack and wrinkles that have occurred in the interior materials and neatly constructing and finishing them will be hindered.

Therefore, organic solvent solution type adhesives cannot be used for constructing interior materials, and therefore, the application of interior materials to exterior materials has been unexpected to those skilled in the art.

Therefore, the present invention attempts to solve these problems at once, and it involves finishing the exterior of a building in accordance with the interior finishing method,
The primary objective is to eliminate the deficiencies of conventional building exterior finishing methods, such as carrying around liquid paint, dripping and scattering, nuisance to neighbors, and wasted work associated with curing.

Therefore, a second object of the present invention is to obtain an exterior sheet such as paper wrapping paper, heavy wallpaper, vinyl wallpaper, etc., and a suitable adhesive to be applied to the back side thereof. However, the exterior sheet is flexible and crack-resistant, with excellent water resistance, weather resistance, light resistance, etc., and the construction work of the exterior sheet, which is performed by smoothing out wrinkles and slack, is not hindered. The objective is to obtain an adhesive for exterior sheets that is water resistant.

The third object of the present invention is to solve problems such as mortar surfaces with cracks and spliced plywood surfaces with gaps, which previously could not be constructed without making the foundation flat in terms of concealability. Another object of the present invention is to enable the construction of an exterior sheet directly without adjusting the base material.

A fourth object of the present invention is to establish a building exterior finishing method that facilitates the repair of cracks and damage caused to the exterior walls of existing buildings.

Furthermore, a fifth object of the present invention is to enable even a thin vinyl film to be used as an exterior sheet without causing problems regarding concealability, and without bonding paper backing. .

Other objects of the invention will become apparent from the description below.

[Structure of the invention]

In order to achieve the above object, in the present invention, resin emulsion, water-soluble glue, cement, and water are kneaded and coated on the back side of the exterior sheet, and the mixture is pasted to the wall surface to finish the exterior of the building. A suitable exterior sheet with a thickness of 40 mm
The surface of a flexible thin inorganic sheet with a diameter of 0μ or less is made by spraying and adhering aggregate using emulsion resin, and the surface is decorated without pasting backing paper on the back side. The adhesive powder is prepared by mixing a powder paste, cement, and a filler with an average particle size of 20 to 300 microns to facilitate exterior finishing work.

The resin emulsion applied to the back side of the exterior sheet during exterior finishing work usually includes rubber latex, vinyl acetate, ethylene vinyl acetate, acrylic ester, etc.
Emulsions commonly used under names such as "Bond" are used, and water-soluble glues such as carboxylmethyl cellulose, methyl cellulose, polyvinyl alcohol, modified starch, and dextrin are used. In addition to polylutraland cement, silica cement, and blast furnace cement, cements include anhydrous calcium silicates such as trilime silicate and dilime silicate, and aluminic acids such as trilime aluminate and tetralime aluminate iron. A material that hardens through a hydration reaction, such as calcium, is used.

Of course, it does not matter whether it is called white cement or not.

As the emulsifiable resin powder, there is used a powder resin which is blended as a usual so-called "powder emulsion" which becomes an emulsion when dispersed in water in order to increase the concentration of resin solids contained therein, such as latex.

The compounding ratio of the exterior sheet adhesive is 1 part cement.
The standard is 0 to 50 parts by weight, 0.5 to 5 parts by weight of water-soluble sizing agent, 0.5 to 10 parts by weight of emulsion resin, and fillers, pigments, cement hardening regulators (accelerating agent, retarder) as appropriate. ), etc., and fillers include powders such as barium sulfate, calcium carbonate, alumina hydroxide, silica, talc, and other plastics, as well as glass beads and microballoons (for example, hollow balloons sold under the trademark Q-cell). Soda carbonate, sodium aluminate, sodium silicate, ferric chloride, aluminum chloride, etc. are used as cement quick setting agents, and calcium chloride etc. are used as cement hardening accelerators.

When applying the exterior sheet adhesive, a silicone or fan-based water repellent may be applied to the surface of the exterior sheet to make it antifouling for tank water.

To explain in more detail the exterior sheet according to the present invention, the thickness of the asbestos sheet, glass fiber cloth, etc. is 400 mm.
The surface of a thin, flexible inorganic sheet (woven fabric or non-woven fabric) with a thickness of less than μ, preferably less than 300 μ is sprayed and bonded with aggregate using emulsion resin to give a surface decoration, and no backing paper is attached to the back surface. As this emulsion resin, an acrylic resin emulsion or an ethylene/vinyl acetate resin emulsion is recommended. Of course, it may be blended with fillers such as pigments, talc, calcium carbonate, aluminum hydroxide, titanium oxide, etc., or powder wax or emulsion water repellent, or it may be blended with some of the above cements. You can also do that. As the filler in this case, micro perfect spheres such as crow beads and microballoons with a particle size of 100 μm or less are recommended. The aggregate may be in the form of granules, scales, or columns, and may be inorganic such as sand or cold water, or organic such as light-resistant plastic pulverized particles, such as inorganic sheets coated with emulsion resin. It can be sprayed and bonded to the resin, or it can be mixed with emulsion resin and bonded by spraying. The surface of the exterior sheet made in this way can be finished by appropriately embossing or printing, or by applying a water-lifting agent, but in that case, care should be taken to ensure that the surface irregularities caused by the aggregate do not disappear.

〔Effect of the invention〕

(1) In the present invention, the cement in the adhesive applied to the back surface of the exterior sheet undergoes a hydration reaction with the water contained in the resin emulsion and the water-soluble adhesive and hardens.

In other words, the adhesive does not solidify due to the evaporation and drying of the water held by the resin emulsion and water-soluble glue, and the exterior sheet adheres to the construction base, but the water held by the resin emulsion and water-soluble glue hydrates with the cement. The reaction causes the adhesive to solidify, and the exterior sheet adheres to the construction base. For this reason, the thickness of the adhesive applied during construction does not change after construction, and a mortar layer of adhesive is formed on the back surface of the exterior sheet. This mortar layer is opaque, has concealing properties, is nonflammable, and has water resistance. Therefore, it is possible to install exterior sheets in bathrooms and outdoors that require water resistance, and since the mortar layer ensures concealment, even thin vinyl films can be used as exterior sheets without pasting backing paper. This makes it possible to directly attach the exterior sheet to a substrate that has cracks or unevenness when joining plywood, without requiring any preparation of the substrate to eliminate the unevenness. In addition, the thickness is 100μ or less5
When using a plastic, ultra-thin sheet such as a vinyl film of around 0μ as an exterior sheet, after directly attaching it to the wall, protrusions with a flat protruding surface of about 2 to 5 fi are spaced at intervals of 5 to 10 or more (grooves). ), and then use rollers that protrude evenly over the entire surface to pat the surface in an embossed manner.

In this way, the exterior sheet is thin with no paper lining, so even inorganic sheets, which are generally considered non-stretchable, can be used as a base for applying the undulations that often occur on construction walls and adhering to the construction wall surface. In order to obtain a flexible exterior sheet and to ensure close application, the thickness of the base inorganic sheet is preferably 300 μm or less. The decorative layer formed on the surface of the inorganic base is formed from aggregates having individual contours, so it does not interfere with the flexibility of the inorganic base.

(3) According to the present invention, the resin emulsion, water-soluble glue, cement, and water constituting the exterior sheet adhesive are all harmless to humans and inexpensive, reducing construction costs. Since it takes at least 1 to 2 hours for the hydration reaction of cement to complete, the initial adhesive strength of the adhesive applied to the exterior sheet does not increase rapidly during the construction process, and therefore, it does not adhere to the construction surface. The adhesive does not interfere with manual stretching to remove loose wrinkles that occur in the exterior sheet during temporary adhesion.

However, if the exterior sheet adhesive is mixed and prepared with a resin emulsion, a water-soluble glue, cement, and water, the hydration reaction of the cement will start immediately after that, so the exterior sheet adhesive can be used in a single day. If it gets dirty, it can no longer be reused.

Therefore, the present invention provides an exterior sheet adhesive as a dry powder mixture composition in which an emulsifiable powdered resin, a water-soluble powdered sizing agent, cement, and a filler are mixed, and water is added to this composition as needed. This makes the use of exterior sheet adhesive economical. However, the feature of the exterior sheet adhesive of the present invention lies not only in its economical aspect, but also in that when the average particle size of the filler added to the adhesive is 20 to 300 μm, it is possible to spread it when applied to the back surface of the exterior sheet. The reason is that the adhesive spreads well and can be applied thickly and uniformly.

That is, if the particle size of the filler is less than 20 μm, the adhesive strength and viscosity of the adhesive will decrease, and it will not only be impossible to apply it thickly, but also will tend to sag when bonded to a wall surface, which is not appropriate.

On the other hand, when the particle size is 300 μm or more, the viscosity becomes high, so the adhesive will spread and adhere, and if you add a lot of water, the water will float on the surface and flow, making it difficult to apply thickly and evenly. Become. Therefore, the particle size of the filler should be adjusted to 20-30
It is important to set it to 0 μ, preferably 50 to 100
μ, and more preferably use micro perfect spheres such as glass beads or microballoons as such fillers.By doing so, the adhesive force and spreadability of the exterior sheet adhesive will be further improved, and it will be thick and uniform. Can be applied to.

(4) Also, if a powder with a high specific gravity such as barium sulfate, lead, or iron is added as a filler, the sound insulation effect can be improved. Traditionally, barium sulfate, lead,
Previously, resin sheets mixed with high-density powders such as iron were glued together, but such sheets were heavy and inconvenient to carry.
Previously, when trying to hang a long sheet and adhere it to a wall, it would break midway through, but with the present invention, the sound insulation sheet is made with a powder of high specific gravity at the construction site, so such inconvenience does not occur. In this respect as well, the present invention is extremely practical.

(5) The skin of the finished wall after construction is mainly made of inorganic sheets and cement, so it has excellent water resistance and light resistance, and has the physical properties of an exterior material. And during the construction process,
Since there is no need to carry the exterior sheet adhesive in a container such as a bucket or apply it to a vertical wall surface, the area around the construction site does not get dirty, no curing is required, and there is no need to disturb the neighbors. The invention is extremely advantageous for building exteriors, which were traditionally done by painting or spraying.

(6) Since the exterior sheet according to the present invention is one in which the aggregate is bonded to the surface of the inorganic sheet with an emulsion resin and no backing paper is pasted on the back side, the emulsion resin contained in both the exterior sheet and the exterior sheet adhesive is and inorganic components interact and form a strong bond. The exterior sheet has a decorative surface layer composed of a series of aggregates each having an independent contour. Therefore, even if surface cracks occur due to accidental collisions or bending during transportation because the base is a thin inorganic sheet with little elasticity, the surface cracks will occur along the continuous contour of the aggregate. It is inconspicuous and does not cause any flaws that would make it unusable.

(7) In particular, when cement and minute perfect spheres such as crow beads or microballoons are mixed with the emulsion resin that is the binder for the inorganic sheet and aggregate, the minute perfect spheres act like an active agent, so that the cement An exterior sheet can be obtained that has improved water resistance and light resistance depending on the components, but does not lose its flexibility.

Therefore, as is clear, according to the present invention, building exterior finishing work is dramatically streamlined, even an amateur can easily carry out the present invention to repair a cracked mortar wall surface, and the sound insulation effect is improved. The present invention is very practical and convenient because it can be finished on a wall with a certain thickness.

Claims (3)

[Claims] (1) An exterior sheet construction method characterized by kneading and applying a resin emulsion, water-soluble glue, cement, and water to the back side of the exterior sheet and pasting it to the wall surface. (2) Exterior sheet adhesive comprising a mixture of an emulsifiable powdered resin, a water-soluble powdered glue, cement, and a filler, the filler having an average particle size of 20 to 300 μm. agent. (3) The surface of a flexible thin inorganic sheet with a thickness of 400μ or less is decorated by sprinkling and adhering aggregate using emulsion resin, and is characterized by having no backing paper attached to the back surface. exterior sheet.