JPH0633665B2 - Base material for construction and manufacturing method thereof - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a building base material and a method for producing the same, and in particular, to apply a finish coating material or paint to the surface of a building structure material immediately after construction. The present invention relates to a building base material that can be used and a method for manufacturing the same.

(Prior Art) In recent years, the following materials have been proposed as this type of construction base material.

(A) Resin coating such as adhesive solution or emulsion of synthetic resin, methyl cellulose, polyvinyl alcohol, latex, vulcanized rubber solution, etc., or coating in which inorganic material particles and / or powder are mixed over the entire surface of the wooden board Was applied so that it becomes uneven, and then dried and solidified (JP-B-53-20563).

(B) A coating material consisting of a synthetic resin emulsion, hydraulic cement containing silicate, and an inorganic lightweight aggregate having an apparent specific gravity of 0.4 or less is applied to the surface of a wooden board to form a rough surface (Japanese Patent Publication Sho 58-4749). ).

(C) Waterproof consisting of a synthetic resin emulsion, synthetic rubber latex, bituminous emulsion, a mixture of butyl rubber and bituminous emulsion, or a mixture of polypropylene and bituminous on a wood-based plate-shaped substrate. Layers and
A mixture layer composed of an inorganic binder and foamed resin particles is provided (Japanese Patent Publication No. 58-47575).

(Problems to be solved by the invention) In all of these conventional techniques, wood scraping required for construction such as mortar coating of buildings, lath base plate attachment such as plywood, waterproof paper attachment, lath attachment, It is intended to save labor in the base process such as mortar undercoating, and is obtained by forming a coating layer with excellent adhesion and adhesion with the mortar on the surface of the base material, and after the construction, the mortar on the surface , Plaster plaster, dolomite plaster, etc.

The coating layer in these construction base materials according to the prior art is
In (a), inorganic material powder (that is, mainly cements), in (b), the main material is silicate-containing hydraulic cement such as Portland cement, silica cement, blast furnace cement, fly ash cement, and ( In (c), in addition to Portland cement, gypsum, etc., ultra rapid hardening cement, high alumina / high gypsum quick hardening cement, etc. can be used, but in any case, the surface coating layer is formed mainly from cements. There is. Therefore, these base materials have a cement color (gray color).

However, in recent years, white or light-colored tones are predominant on the walls of houses. In order to adapt to this, it is necessary to apply a finish (mortar finish, spray finish, etc.) to a white or light color after applying these conventional base materials. Alternatively, it is necessary to apply a thick finish coating to prevent the see-through of the color of the base material, which impairs the simplification and labor saving in the finishing process, which is the original purpose of these conventional techniques.

In view of the above circumstances, the present invention simplifies the finishing process.
An object of the present invention is to provide a building base material having a white coating layer and a method for producing the same, which can provide a white-tone or light-colored finished surface while achieving labor saving.

(Means for Solving the Problems) The present invention devised to achieve the above object comprises a substrate and a white coating layer applied to the surface of the substrate, the white coating layer being a white Portland semé. For building, characterized by being composed of a mixed coating material composed mainly of a hydraulic binder made of a mixture of natural or white Portland cement and ordinary Portland cement, which is mixed with an aggregate and a resin solution. It is a base material.

The present invention is also based on a hydraulic binder consisting of 5 to 100 parts by weight of white Portland cement and 95 to 0 parts by weight of normal Portland cement, with 10 to 500 parts by weight of aggregate and resin solution 1 based on the main component. ~ 100 parts by weight (resin solid content) is mixed with water by stirring to prepare a mixed coating material, the mixed coating material is applied to the surface of a substrate, and then the mixed coating material is dried and cured to solidify a white color. A method for producing a building base material, which comprises forming a coating layer on the surface of the base material.

(Function) In the architectural base material according to the present invention, the coating layer formed on the surface thereof is composed mainly of white Portland cement or a mixture of white Portland cement and ordinary Portland cement. Is white.

(Explanation of the structure of the invention) As the base material of the building base material according to the present invention, plywood, fiber board, gypsum board, cement board, wood shaving board, wood cement board,
ALC plate, asbestos cement plate, calcium silicate plate, magnesium carbonate plate, resin plate, resin foam plate, or other inorganic or organic plate, or a plate-like body composed of an inorganic or organic mixture or complex may be appropriately used. it can. The present invention does not limit the material of the base material.

The coating layer is mainly composed of a hydraulic binder composed of white Portland cement or a mixture of white Portland cement and ordinary Portland cement, and an aggregate and a resin solution are mixed therein. The coating film is formed by adding 10 to 500 parts by weight of an aggregate and 1 part of a resin solution to a hydraulic binder composed of 5 to 100 parts by weight of white Portland cement and 95 to 0 parts by weight of ordinary Portland cement.
~ 100 parts by weight (resin solid content) is mixed with water by stirring to prepare a mixed coating material, which is applied in layers on the surface of the base material by using an appropriate coating device such as a roll coater, a bar coater or a spraying device. It is done by

The hydraulic binder which is the main component of the coating layer is composed of 5 to 100 parts by weight of white Portland cement and 95 to 0 parts by weight of ordinary Portland cement as described above. In other words, the white Portland cement alone is used. Alternatively, 5 parts by weight or more of white Portland cement is mixed with ordinary Portland cement and used. Although it varies depending on the type and amount of aggregates mixed separately, when the amount of white Portland cement mixed with ordinary Portland cement is less than 5 parts by weight, a desired white coating layer is stably formed on the substrate. Cannot be formed.

Further, in place of ordinary Portland cement, early or ultra early strength Portland cement, moderate heat Portland cement, mixed cement such as blast furnace cement, silica cement and fly ash cement, alumina cement and the like may be used.

Aggregates to be mixed with the hydraulic binder include calcium carbonate, clay, fly ash, incinerated ash, slag, sand, talc, limestone grains, silica stones, crushed stones, and other inorganic aggregates, polyethylene, polystyrene, and other synthetic resins. Organic aggregate such as beads, vermiculite, expanded shale, expanded clay, perlite, inorganic lightweight aggregate such as shirasu balloon, foamed polyethylene,
It is an organic lightweight aggregate such as synthetic resin foam beads such as polystyrene and urethane, or crushed particles of synthetic resin foam,
They can be used alone or in an appropriate mixture. The amount of these aggregates mixed is 10 to 500 parts by weight with respect to the hydraulic binder as the main component, and is appropriately determined within this range in consideration of the specific gravity of the aggregates used. For example, when an inorganic or organic aggregate is used, its specific gravity is 2 or more, so if the mixing amount increases, the weight of the base material itself increases and the workability during transportation or construction deteriorates, while the mixing amount decreases. In this case, it contributes to the weight reduction, but the amount of expensive cement used is relatively increased, which causes an increase in the price of the base material itself. Further, since the inorganic or organic lightweight aggregate has a specific gravity of 2 or less, it is possible to reduce the weight of the base material itself by increasing the mixing amount, but if an excessively large amount of the lightweight aggregate is blended, a coating film can be obtained. The layers will be fragile and will tend to be scratched or chipped during transportation and construction.

The resin solution mixed with the hydraulic binder together with the aggregate is a synthetic resin such as vinyl acetate resin, vinyl chloride resin, acrylic resin, epoxy resin, ethylene-vinyl acetate resin, acrylonitrile butadiene rubber (NBR), butadiene acrylogo. Rubber (MBR), styrene butadiene rubber (SB
Synthetic rubber latexes such as R), polyvinyl alcohol, methyl cellulose and the like, preferably Elman John type, are used alone or in admixture of a plurality.

These resin solutions not only make the mixing and adhesion of the hydraulic binder, which is the main component, and the aggregate good, and not only strengthen the adhesion to the substrate, but also waterproof the coating layer after drying and solidification. Function to improve the adhesiveness and the adhesive force between the coating layer and the finish coating material, and to achieve this purpose, 5 to 100 parts by weight (resin solid content. In the present specification, the same) is used as a mixture. If the mixing amount of the resin solution is less than 5 parts by weight, not only the waterproof property but also the adhesive force to the base material and the adhesive force to the finish coating material cannot be expected.
Even if it is used in a large amount in excess of 00 parts by weight, not only the cost is increased but also a remarkable effect cannot be obtained.

When the mixed coating material is applied in layers on the substrate to form a coating layer, the surface may be formed in an uneven shape, a rough surface, or a smooth surface. For example, when the spray coating material is formed into a stucco shape on the base material, the coating layer surface is made uneven, when the spray coating material is formed into a lysine shape, the coating layer surface is made rough, and a flat coating is applied. When it is desired to obtain a surface, it is possible to form a smooth coating layer, which makes it possible to easily obtain a desired coated surface.
Further, the designability can be further improved by appropriately combining these uneven, roughened, and smooth coating layers with the method for forming a spray coating material. For example, only the colored coating is applied to the surface of the coating film layer having an uneven shape, so that the uneven surface can be directly expressed as a decorative surface.

The base material on the surface of which the mixed coating material has been applied in layers as described above is then inserted into a drying device to be dried and solidified or deposited to be cured and solidified to form a white coating layer.

On the surface of the base material, if necessary, a resin solution is applied and dried using a coating device such as a roll coater or a flow coater to form a waterproof coating layer, and the mixed coating material is subsequently formed on the surface of the waterproof coating layer. Can be coated to form a coating layer. Formation of the waterproof coating layer is particularly desirable when the substrate surface is porous and not smooth. That is, when the mixed coating material is directly applied to a base material having a porous surface, voids (air pockets) are formed in the recesses on the surface of the base material, bubbles are generated, and the adhesive force with the mixed coating material is reduced. The prevention coating layer has an apparently smooth surface on the substrate,
By substantially increasing the adhesion area between the base material and the mixed coating material, the above-mentioned drawbacks are prevented and the adhesive strength is improved.

In addition, depending on the base material, water or an alkali-soluble component (ac)
However, the waterproof coating layer prevents these elutions, and prevents the retardation or inhibition of the curing of the mixed coating material applied on it due to water or an alkali-soluble component, and at the same time, mixing by the components. It is also possible to prevent the coating material from being contaminated. Furthermore, it is possible to prevent water from permeating from the surface and prevent warping and decay of the base material due to water absorption and hygroscopic expansion due to permeated water.

An optional coloring material may be added and mixed into the mixed coating material as needed to color the coating layer in a desired color tone. For example, by applying a desired color tone in advance according to the color tone of the finish coating material, thin coating of the finish coating material can be easily achieved, and the color tone of the coating layer and the finish coating material can be changed. The change coating can be easily performed.

(Example) Attached Figs. 1 to 6 show an example of a building base material according to the present invention. Fig. 1 shows a white coating layer 2 formed on a substrate 1 with a smooth surface. FIG. 2 shows the waterproof coating layer 3 formed on the substrate 1, and the white coating layer 2 has a smooth surface formed thereon. FIG. 3 shows the white coating layer 2 on the substrate 1. ′
FIG. 4 shows a base material 1 on which a waterproof coating layer 3 is formed, and a white coating layer 2 ′ is formed on the base material 1 on the surface, and FIG. 5 shows a base material. 1 has a white coating layer 2 ″ formed on its surface in a roughened surface. FIG. 6 shows a waterproof coating layer 3 formed on a base material 1 and a white coating layer 2 ″ formed thereon with a rough surface. These are formed in a plane shape, respectively.

(Effect of the invention) In the architectural base material according to the present invention, since the white coating layer is formed on the surface thereof, the surface color can be easily hidden even when finish-coating in white or light color. A thin coating of the finish coating material can be realized. That is, it is possible to achieve simplification and omission in the finishing process of white or light coloring.

Furthermore, since the white Portland cement itself exhibits higher strength than ordinary Portland cement, the coating layer formed by using a considerable amount of it exhibits a large strength, and the coating layer itself is not easily damaged and is durable. In addition, it is excellent in abrasion resistance and the durability as a base material is also improved.

[Brief description of drawings]

1 to 6 of the accompanying drawings are all cross-sectional views showing a structural example of a building base material according to the present invention. Explanation of reference numerals 1 ... Base material 2 ... White coating layer with smooth surface 2 '... White coating layer with uneven surface 2 "... White coating layer with rough surface 3 ... Waterproof coating layer

Claims (7)

[Claims] 1. A hydraulic binder comprising a substrate and a white coating layer applied to the surface of the substrate, the white coating layer comprising white Portland cement or a mixture of white Portland cement and ordinary Portland cement. A base material for construction, characterized in that it is formed by a mixed coating material composed mainly of, and an aggregate and a resin solution. 2. A hydraulic binder comprising 5 to 100 parts by weight of white Portland cement and 95 to 0 parts by weight of ordinary Portland cement as a main component, and the aggregate 1 to the main component.
0 to 500 parts by weight and 1 to 100 parts by weight of resin solution (resin solid content) are mixed by stirring with water to prepare a mixed coating material, the mixed coating material is coated on the surface of a substrate, and then the mixed coating material is applied. A method for producing an architectural base material, which comprises solidifying by drying or curing to form a white coating layer on the surface of the base material. 3. The method for producing a building base material according to claim 2, wherein the white coating layer is formed so as to have a surface irregularity. 4. The method for producing a building base material according to claim 2, wherein the white coating layer is formed so as to have a rough surface. 5. The method for producing a building base material according to claim 2, wherein the white coating layer is formed so as to exhibit a smooth surface. 6. The method for producing a building base material according to claim 2, wherein the aggregate is an inorganic or organic lightweight aggregate alone or in an arbitrary mixture. 7. A white coating layer is formed by first forming a waterproof coating layer made of a resin solution on the surface of the base material, and coating the mixed coating material on the waterproof coating layer. The method for producing a building base material according to claim 2.