JPS58543B2 - Architectural base material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a base material used when painting or pasting ceramic construction materials such as mortar or tiles on the surface of a structure.

Conventionally, the base material for attaching ceramic construction materials such as mortar-coated walls and tiles for general wooden houses is lath baseboard (commonly known as sashiban).
Asphalt waterproof paper is applied to the outside surface, and then a metal mesh lath is applied to the outside and a mortar coating is applied.
There is a lot of on-site work for mortar base construction, which requires a lot of manpower and takes a long time, and also has drawbacks such as cracks appearing relatively early in the bonded joints of mortar and tiles.

Furthermore, it is difficult to completely prevent the water permeability of painted mortar, and water permeation through tears in the asphalt waterproof paper during the construction process cannot be avoided.

As a result, the base materials, pillars, foundations, etc. become damp and are attacked by rotting fungi and termites, causing them to rot.

Other base materials available include kraft paper with a wire mesh inserted into it, and metal lath fixed to a substrate such as plywood, but both have problems in terms of corrosion resistance.

Furthermore, in recent years, as a base material for mortar painting or tiling, the surface of plywood or asbestos slate board substrates has been coated with a non-vulcanized rubber coating layer mainly composed of asbestos fibers and calcium carbonate, and asphalt and thermoplastic or thermosetting resin. The coating layer is a mixture of cement, synthetic resin emulsion and silica,
Undercoat materials have also been devised that are made by directly applying paint containing charcoal or other substances to create a coating layer.

Among these base materials, those with a coating film mainly composed of cement have excellent adhesion with the plastering mortar because the main component is the same cement as the plastering mortar applied on site, and cement is similar to rubber, asphalt, etc. It has the advantage of being extremely cheap compared to other materials.

However, paint films containing cement as a main component are inherently difficult to adhere to wood substrates, as is the case with plywood used as concrete formwork, and are susceptible to curing failure due to the influence of wood extracts.

The present invention has been made to solve these problems.

That is, the present invention provides a layer of synthetic resin sealer on the surface of a wooden substrate such as plywood, particle board, hardboard, etc., and an undercoat on the top surface containing 10 parts by weight or more of a water-soluble synthetic resin and an appropriate amount of pigment per 5 parts by weight of cement. A resin mortar containing 10 parts by weight of cement, 2 to 4 parts by weight of a water-soluble synthetic resin, and 9 to 10 parts by weight of silica/sand is applied to the top surface of this undercoat paint layer, forming a regular uneven surface with undulations. It is a base material for construction that is applied in a similar manner.

To explain the present invention in detail with reference to the drawings, FIG. 1 is a cross-sectional view showing the base material of the present invention, in which a synthetic resin sealer layer 2 is first formed on the surface of a wooden substrate 1.

The synthetic resin sealer layer 2 is an alkali-resistant synthetic resin paint that has excellent adhesion to the wooden substrate 1 and to the undercoat layer 3 applied to the top surface, and is made of rubber latex, acrylic resin, epoxy resin, or urethane resin. Paints, etc. are used.

The synthetic resin sealer layer 2 strengthens the fibers on the surface of the wooden substrate 1, creates a water-impermeable film, prevents poor curing of the cement components in the undercoat layer 3 and the resin mortar layer 4 due to wood extracted components, and also It has the effect of preventing corrosion of the wooden substrate 1 due to water.

The synthetic resin sealer layer 2 is formed by coating using a coating machine such as a roll coater, flow coater, or spray coater.

Next, the undercoat layer 3 applied to the top surface of the synthetic resin sealer layer 2 is composed of 5 parts by weight of cement, an emulsion of rubber latex, acrylic resin, epoxy resin, etc., or a flexible water-soluble synthetic resin such as water-soluble urethane resin. 10 resin
Parts by weight or more, plus clay calcium carbonate as a pigment,
Use a mixture with an appropriate amount of stone powder added.

Experiments have shown that adding 10 parts by weight or more of water-soluble synthetic resin to 5 parts by weight of cement is because if the amount is less than 10 parts by weight, the undercoat layer 3 will have strong cement-like properties and the synthetic resin sealer layer 2 will be mixed with the synthetic resin sealer layer 2. This is because the adhesion strength due to the bonding of the resin components is weakened and it takes a long time to dry the undercoat layer 3.

Furthermore, the addition of appropriate amounts of pigments such as clay, calcium carbonate, and stone powder is intended to provide a sealing effect to the paint and to improve the viscosity of the paint.

The undercoat layer 3 is formed smoothly using a coating machine such as a roller coater, reverse coater flow coater, or spray coater.

Therefore, the undercoat layer 3 not only ensures perfect adhesion between the synthetic resin sealer layer 2 and the resin mortar layer 4, but also fills in and smooths the small irregularities 7 on the surface of the wooden substrate 1, making it easier to form the resin mortar layer 4 uniformly. In addition, one layer of synthetic resin sealer 2
Forms a complete waterproof layer through a synergistic effect.

Since the synthetic resin sealer layer 2 and the undercoat layer 3 have a certain degree of flexibility, they buffer the expansion and contraction force caused by moisture absorption and desorption on the surface of the wooden substrate 1 and prevent cracks caused by expansion and contraction of the resin mortar layer 4 and the wooden substrate 1 of plastering mortar. It has the effect of preventing

Further, the resin mortar layer 4 exhibiting a regular uneven surface 6 formed on the top surface of the undercoat layer 3 is made of cement 10.
2 to 4 parts by weight of a water-soluble synthetic resin such as an emulsion such as rubber latex, acrylic resin, or epoxy resin or a water-soluble urethane resin, and 1 to 1 part by weight of No. 6 to 7 silica sand.
It is formed using a mixture of 0 parts by weight, a viscosity modifier, and water.

If 2 to 4 parts by weight of water-soluble synthetic resin is added to 10 parts by weight of cement, if the amount exceeds 4 parts by weight, the properties of the resin mortar will approach that of resin, increasing its fluidity and forming the desired regularly uneven rough surface. As the cement becomes harder, the chemical synthesis strength of the cement components themselves weakens, making it impossible to obtain the final hardness and strength of the cement.

On the other hand, if the amount is less than 2 parts by weight, temporary drying of the resin mortar will be slow, and even if the uneven rough surface 6 is formed, the convex portions will collapse when stacked, making it unsuitable for continuous factory production.

Furthermore, the chemical bonding force with the synthetic resin component in the undercoat layer 3 is also weakened, causing problems such as easy peeling between the layers.

9 to 10 parts of No. 6 to 7 silica sand is added to 10 parts by weight of silica sand because No. 6 to 7 sand has a particle size that is most convenient for use in coating machines that apply to form a regular uneven surface 6 described later. In addition, silica sand is partially exposed on the uneven surface and forms a fine rough surface, and it also tends to trap small amounts of air into the resin mortar coating, and this air foams on the coating surface during the drying process. This creates minute holes and further promotes the bonding force due to the anchoring effect of the plastering mortar that is overcoated on site.

Appropriate amounts of the viscosity modifier and water are added in order to improve the paintability of the resin mortar and to induce water utilization reactions in the cement components.

As a coating method for the resin mortar layer 4 to form a regular uneven rough surface 6, a resin mortar paint is applied to the surface of the wooden substrate 1 on which the synthetic resin sealer layer 2 and the undercoat layer 3 are formed using a roll coater or reverse coater. After applying the coating to a smooth and uniform thickness using a spreader, it is formed under pressure using an embossed rubber roll with the desired grooves, or by applying a coating roll using a roll coater with a coating roll having the desired grooves. By adjusting the rotation ratio of the doctor roll and the spacing between the coating roll and the feed roll, a regular uneven surface 6 as shown in FIG. 2 is formed.

Therefore, the resin mortar layer 4, which is formed on the upper surface of the undercoat layer 3 to have a regular rough surface 6, is strongly bonded physically and chemically with the synthetic resin component and cement component of the undercoat layer 3A, and is painted on site. It also bonds physically and chemically with the cement components in plastering mortar.

Furthermore, the regular uneven rough surface 6 provides excellent initial adhesion of plastering mortar, and has the effect of making work such as troweling extremely easy.

As described above, according to the present invention, the composition of the paint formed on the surface of the wooden substrate is gradually changed from the synthetic resin component, which easily adheres to the wooden substrate, to the cement component, which the plastering mortar easily adheres to, and also creates an uneven surface. Because of this, not only the paint itself is bonded, but each layer of the paint is also physically and chemically bonded with an anchoring effect, and the substrate, paint, and plastering mortar are bonded as if they were integrated, and the plastering mortar layer retains its properties for a long time. enable.

In addition, since the paint of the present invention consists of an undercoat layer containing a large amount of flexible synthetic resin and a resin mortar layer with appropriate flexibility, it is susceptible to shrinkage, cracks, and impact from external forces due to the expansion and contraction of the wooden substrate and the hardening of plastering mortar. It can also sufficiently buffer against cracks caused by this, preventing cracks.

Furthermore, among the paints of the present invention, especially the synthetic resin in the first layer of synthetic resin sealer and the undercoat layer has waterproof performance, so even if water penetrates from the outer wall surface layer or the joints of tiles, it will not affect the substrate, pillars, foundations, etc. Structural materials such as can be prevented from rotting.

Therefore, the present invention provides a mortar that is highly durable and does not require much labor on site, since it is possible to form a base such as mortar or tiles by simply applying it to the structure of a building, and the mortar or tiles can be applied and pasted directly. Walls and tile walls can be constructed in a short construction period.

Next, examples of the present invention will be shown.

Example 1 Apply 100% rubber latex emulsion paint to the surface of plywood
&/m2 was applied to form a single layer of synthetic resin sealer.

Next, on this layer of synthetic resin sealer, 5 parts by weight of Portland cement and 1 part by weight of clay were mixed in a powder state, and 10 parts by weight of rubber latex emulsion was added to this mixture and a paint mixture was applied by a roll coater at 200 mm2. Thereafter, it was dried at 60 to 70°C for 3 to 5 minutes to form an undercoat layer.

Again, 100 parts by weight of Portland cement and 100 parts by weight of No. 7 silica sand were mixed in powder form onto this undercoat layer, and 30 parts by weight of rubber latex emulsion and 25 parts by weight of water were added to this mixture.
Appropriate amounts of carboxymethyl cellulose were added and mixed as a weight part and a viscosity modifier to form a paste, which was coated at 1500 g/m2 using a roll coater equipped with a coating roll having regular grooves of the desired depth and shape. ,
Thereafter, it was dried at 60 to 70°C for 20 minutes to obtain a base material of the present invention.

Example 2 Apply 120% acrylic resin paint to the particle board surface.
/m to form a single layer of synthetic resin sealer.

Next, on the upper surface of this synthetic resin sealer, 180mm2 of a paint mixture of 5 parts by weight of Portland cement, 2 parts by weight of calcium carbonate, and 11 parts by weight of acrylic resin emulsion was applied using a roll coater, and then 60~
It was dried at 70°C for 4 to 6 minutes to form an undercoat layer.

Again, 100 parts by weight of Portland cement and 90 parts by weight of No. 6 silica sand were mixed in powder form onto this undercoat layer, and 40 parts by weight of acrylic resin emulsion, 22 parts by weight of water, and an appropriate amount of brown pigment were added and mixed to this mixture. The paste was coated smoothly at 2,000 g/m2 with a roll coater, then molded with an embossed rubber roll with regular grooves of desired depth and shape, and then coated with a 60 to 70 g/m2 coating.
The base material of the present invention was obtained by drying at ℃ for 25 minutes.

Example 3 A urethane resin paint was applied to the surface of a hardboard at a rate of 100 cm to form a single layer of synthetic resin sealer.

Next, on the upper surface of this synthetic resin sealer, 200mm of a paint mixture of 5 parts by weight of Portland cement, 1 part by weight of stone powder, and 10 parts by weight of water-soluble urethane resin was applied using a spray coater, and then heated at 60 to 70°C for 4 hours. ~6
It was dried for a few minutes to form an undercoat layer.

Again, 100 parts by weight of Portland cement and 100 parts by weight of No. 7 silica sand were mixed in powder form onto this undercoat layer, and 30 parts by weight of water-soluble urethane resin and 23 parts by weight of water were added and mixed to this mixture to form a paste. The material is coated with a roll coater having a coating roll with regular grooves of desired depth and shape, and then heated at 70 to 80°C for 25 minutes.
The base material of the present invention was obtained by drying for a minute.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the base material of the present invention. FIG. 2 is an enlarged perspective view showing the base material of the present invention. 1... Wooden substrate, 2... One layer of synthetic resin sealer, 3... Undercoat layer, 4... Resin mortar layer, 5... Silica sand, 6... Regular uneven rough surface, 7... Small unevenness on the surface of the wood substrate.

Claims (1)

[Claims] 1. A layer of synthetic resin sealer 2 on the surface of a wooden substrate 1 such as plywood.
, 1 part water-soluble synthetic resin per 5 parts by weight cement on the top surface.
0 parts by weight or more and clay, lucium carbonate, whitebait,
An undercoat layer 3 is prepared by adding and mixing an appropriate amount of pigment such as stone powder, and on top of this, 2 parts water-soluble synthetic resin is applied to 10 parts by weight of cement.
~4 parts by weight and 9 to 10 parts by weight of silica sand 5 as an additive and aggregate are mixed in to form a resin mortar layer 4, and the surface of the resin mortar layer 4 exhibits a rough surface 6 with regular undulations. Architectural base material.