JPS5910909B2 - Fireproof composite board material and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a lightweight fireproof composite board with excellent heat insulation and fireproof properties.

Furthermore, the present invention relates to a method for quickly obtaining a fireproof composite plate material through simple operations. Furthermore, the present invention has been made in order to speed up the subsequent decorative work process of the board material, and furthermore, it is an object of the present invention to provide a member that has various performances required as a board material for construction. When plywood is used as a base material for the walls of buildings, it has been known for a long time to plaster it with wall covering materials such as cement mortar and gypsum plaster (hereinafter simply referred to as mortar), and even today 25 It is widely used because of its characteristics such as good workability at construction sites, low cost, and high resistance to fire.

On the other hand, in today's labor-saving era, there is a movement to finish all wall construction materials in a factory at once.
Composite plywood has been developed in which mortar and other materials are plastered in a factory. However, in these fields, when using mortar, etc., the curing period for proper hardening is long, and there are many problems during application work due to the decrease in the number of skilled plasterers.35 Also, in terms of physical properties, insulation Because the heat, fireproofing, and soundproofing properties are not sufficient, other heat insulating materials and soundproofing materials are used in combination. On the other hand, mortar and the like have low fire retardant properties because they tend to dehydrate and collapse at around 600° C. due to their inherent thermal properties. Furthermore, when applying a decorative finish to the fireproof composite board, the surface of the mortar etc. is easily powdered, making it difficult for decorative coating materials to adhere to it. The present invention significantly corrects the prior art, and aims to provide a wide range of industries with composite board materials with excellent performance by improving simple construction methods for building walls using plywood.

That is, the present invention essentially relates to a fireproof composite board in which the surface of plywood is coated with a specific inorganic room-temperature foamable composition, and an inorganic foam layer is formed on the surface of the plywood by foaming and curing of the composition. In order to obtain the above-mentioned fireproof composite board material, a fibrous substance is attached to the surface of the inorganic room temperature foamable composition layer, and a coating film waterproofing material and/or is applied between the plywood and the inorganic room temperature foamable composition layer. This includes interposing a fibrous substance. The fireproof composite board obtained by the above-mentioned manufacturing method is extremely lightweight, yet has excellent heat insulation and fireproofing properties.Moreover, since the inorganic room-temperature foam layer is strongly adhered to the plywood, it has excellent impact resistance, It has excellent basic physical properties as a board material, such as vibration resistance, and also exhibits quite high compressive strength.

The present invention not only greatly improves the physical properties of the plate material as described above, but also makes great progress in terms of workability.

In other words, in order to impart fireproofing and fire resistance to plywood, the thickness of mortar must be maintained at a thickness of 2511 or more when used on walls, and for this reason, plastering must be done with two or more coats. The mortar is then adjusted to an appropriate thickness, and if necessary, after the surface of the mortar has sufficiently dried, an appropriate decorative coating material is applied and a decorative finish is applied. According to the present invention, the coating thickness is also determined from 3 to 3 after the substantially inorganic room temperature foamable composition is applied to the plywood.
Since it expands about 10 times, even if it is applied uniformly to about 511, it will only last about 15 to 50%, and because it dries and hardens very quickly, the next decorative coating can be applied quickly. be. The present invention will be explained in detail below. Inorganic room temperature foamable composition (hereinafter simply referred to as composition) described in the present invention
is adjusted by the method of preparing either component (8) or component (B) below.

That is, as for the component composition (4), the PHL. 5
The following aqueous solution, (5) at least one basic powder selected from anhydrous alkali silicates and cement substances, (c) a metal blowing agent, and (d) selected from silica gel, zeolite, carbon black, activated carbon, talc, and mica. By mixing this paste into a paste, a foamed heat insulating material with high thermal insulation properties of cementitious or sodium silicate materials can be obtained at room temperature. In addition, the (8) component composition includes (a) a water-soluble alkali metal salt, (b) alumina cement or a mixture of alumina cement and Portland cement, (e) a metal foaming agent, and (d) the above-mentioned foaming agent. It consists of a stabilizer, and by mixing it into a paste in the presence of water, a foamed heat insulating material with high thermal insulation properties of cementitious or sodium silicate materials can be obtained at room temperature. As the metallic foaming agent used in the present invention, metal elements, metal alloys, and intermetallic compounds can be used. Periodic table 1A for metal elements
1A1B1A1B, A1B, . Any metal element belonging to VA1B, B1B or group can be used, and among them, those belonging to the 3rd to 5th period are preferable. Examples of such metal elements include Mg
、． Ca,. Cr,. Mn,. Fe,. CO,. Nil
Cu,. Zn,. Al,. Ga,. Sn,. Examples include Sb, especially Al, . Amphoteric metals such as Zn are optimal.

In the present invention, B. Metalloid elements such as Si can also be used in the same manner as the above-mentioned metal elements. In the present invention, metal alloys and intermetallic compounds can also be used. Typical examples include Al-Si. Al-Ti. Al-Mn,. Al
-Cu-Si,. Al-Cu,. Zn-S,. Zn-S
n. ．． Sn-Fe,. Cu-Sn. ．． Cu-Si,. C
u-Pb, Cu-Ni. ．． Fe-Mn,. Fe{1. ．．
Fe-Cr. ．． Fe-Si,. Mn-P,. Si-Ni
、． CO-Pb. ．． Examples include Mn-Ag. The inorganic room-temperature foamable compositions constituting the above component (4) or (B) component compositions differ somewhat depending on the specific blending method, but after being mixed into a paste, It produces a foaming/hardening reaction and has uniform air bubbles, usually in the range of 0.5 to 10 mm, has low specific gravity and high strength, and is waterproof, water resistant, chemical resistant, heat insulating, and flame resistant. It is a cementitious or sodium silicate inorganic foam that exhibits excellent properties such as. The selection of such a foam may be made at any time taking into consideration the shape, material, properties, physical properties, etc. of the fireproof composite board to be obtained, and is not particularly limited. Next, the fibrous substances used in the present invention are organic materials,
Regardless of the inorganic material, any material that exhibits a fibrous shape is sufficient, and fibers such as synthetic fibers, natural fibers, glass fibers, asbestos, rock wool, metal fibers, alumina fibers, ceramic fibers, and carbon fibers can be used in the form of chops or woven fabrics. , used in the form of flocks, non-woven fabrics, etc.

In addition, coating film waterproofing material is a coating type waterproofing material that forms a seamless waterproof layer on a waterproof base such as mortar or concrete by methods such as troweling, brushing, and spraying. Refers to items made of resin, etc. The present invention uses the above-mentioned materials to obtain a fireproof composite board by applying it mainly to the surface of water-resistant plywood, and the board is substantially made of a combination of plywood and the composition of the present invention. In order to improve the adhesion with decorative coating materials required for board materials and the waterproof and vibration resistance of wall materials, treatment of the plywood surface and adhesion between the plywood and the composition layer of the present invention are necessary. In order to meet such requirements, it is necessary to attach a fibrous substance to the surface of the composition layer of the present invention, or to add a fibrous substance or a waterproof coating between the plywood and the composition layer of the present invention. It was found that interposing the material had a significant effect.

To explain this with the drawings, FIG. 1 shows a fireproof composite board obtained by applying the composition 2 of the present invention on the surface of the plywood 1, and then pasting the fibrous material 3 immediately before the composition 2 of the present invention hardens. represents. FIG. 2 shows a coating film waterproofing material 4 coated on plywood 1 in advance and dried, and then a fibrous material 3 for an intermediate layer being applied to the coating film waterproofing material 4.
A fireproof composite board is shown in which the composition 2 of the present invention is applied to the surface of the fibrous material 3, and then the fibrous material 3 for the surface layer is attached immediately before the composition 2 of the present invention is cured. Second
The fireproof composite board shown in the figure has particularly good vibration resistance and waterproof properties compared to the one shown in FIG. Embodiments of the present invention are as follows. Example 1 A paste after mixing the following inorganic room-temperature foamable composition was applied to the surface of commercially available structural plywood (182 x 91 x 0.9 cIrL) at a coating amount of 3.5 kg/Trl.
Foaming of the composition began after 0 minutes, and foam curing was completed after 20 minutes, yielding a fireproof composite board having a heat insulating layer with an average thickness of 10 um.

The weight of the fireproof composite board thus obtained was 10.5k.
It was 9. Furthermore, using this plate material, JISA Al32l
When the base material was tested for fire protection as specified in In addition, the heat insulation property has a thermal conductivity of 0.08 kcal/M. ℃ (0.12kcal/m-℃ for plywood alone), and the adhesion strength by JlSA69O95.5 is 3.
It was 1 kg/Cd.

Method for preparing an inorganic room-temperature foamable composition: The inorganic room-temperature foamable composition is divided into components (a) and (b) as follows, and then mixed.

(A) Component Example 2 The same procedure as in Example 1 was carried out, except that a synthetic rubber latex-based coating film waterproofing material was applied in advance to the surface of the structural plywood at a coating amount of 0.5k9/A and dried. A fireproof composite board was obtained by the method.

The weight of the fireproof composite board thus obtained was 10.3 kg. It also passed the fire retardant test with grade 1 flame retardancy, and the adhesion strength was 4.
It was 2 kg/Cd. Example 3 In Example 1, the inorganic room temperature foamable composition was applied.
After 0 minutes, glass fiber woven fabric (2007/A)
I posted it.

After 23 minutes, the foaming and curing of the composition was completed, and a fireproof composite board with a glass fiber woven fabric on the surface layer was obtained.

The weight of this fireproof composite board was 10.8 kg. The flame retardant test passed grade 1 flame retardancy, other properties were almost the same as in Example 1, and improvements in bending strength and vibration resistance were confirmed. Example 4 When an inorganic room temperature foamable composition having the following composition was applied according to the same method as in Example 1, the composition started foaming after about 20 minutes at room temperature, and foaming and hardening was completed after 50 minutes. A fireproof composite board having a heat insulating layer with an average thickness of 911 mm was obtained.

When this plate material was used in a base material fire protection test specified in JIS Al32l, it passed the flame retardant class 1. Further, the thermal conductivity was 0.071 cca1/m-Hr.degree. C., and the adhesion strength was 2.9 kg/i. Method for preparing an inorganic room-temperature foamable composition: The inorganic room-temperature foamable composition is divided into components (a) and (b) as follows, and then mixed.

(a) Ingredients

[Brief explanation of drawings]

The drawings show a cross section of the fireproof composite board of the present invention. Figure 1 shows a fireproof composite board with a fibrous material adhered to its surface, and Figure 2 shows a fireproof composite board with a coating film and a fibrous material between the layers of plywood and foam. processed,
It also represents a fireproof composite board with a fibrous material adhered to its surface.

Claims (1)

[Claims] 1. A method for producing a fireproof composite board, characterized in that the surface of the plywood is coated with an inorganic cold-foamable composition consisting of the following component (A): (A) - Ionization at 25°C Constant (p
An aqueous solution of an acid having a pH of 1.5 or less and having a Ka) of 4.0 or less; - At least one basic powder selected from anhydrous alkali silicates and cement materials; - A metal blowing agent; and - Silica gel, zeolite, and carbon black. , activated carbon, talc and mica. 2. A method for producing a fireproof composite board, characterized in that the surface of the plywood is coated with an inorganic room-temperature foamable composition consisting of the following component (B): (B) - water-soluble alkali metal salt, - alumina cement, or A mixture of alumina cement and Portland cement; - a metallic foaming agent; and - at least one foaming stabilizer selected from silica gel, zeolite, carbon black, activated carbon, talc and mica. 3. Claim 1 or 2, characterized in that a fibrous substance is attached to the surface of the inorganic room-temperature foamable composition layer.
A method for producing a fireproof composite board as described in . 4. The fireproof composite according to claim 1, 2, or 3, characterized in that a coating film waterproofing material and/or a fibrous material is interposed between the plywood and the inorganic cold-foamable composition. Method of manufacturing the board.