JPH0126432Y2 - - Google Patents

Description

[Detailed explanation of the idea]

This invention aims to strengthen the bonding force between the noncombustible base material and the phenol foam, suppress the propagation of vibrations to the phenol foam, and prevent the phenol foam from cracking under high heat. Regarding. BACKGROUND ART With the spread of energy saving ideas, there have been high hopes for the emergence of heat insulating building materials, especially composite building materials with fire retardant and heat insulating properties. In response to this, for example, panels have been proposed in which a phenol foam and a noncombustible base material are integrated into a composite, or a composite board in which a polyurethane resin layer is interposed between the two members to strengthen adhesion. However, in the former panel, the foam formed using phenol foam, especially resol-type phenolic resin, has poor adhesion and is brittle, and moreover, a strong acid substance is used as a hardening agent, and a portion of it remains. There was a risk of corrosion of steel plates, etc. Although the latter composite board can improve the above-mentioned drawbacks, the presence of the polyurethane resin layer, which is a combustible material, increases smoke and afterflame, and creates a space between the two members due to the burning of the resin layer. However, there was a drawback that both members were completely separated. In order to eliminate these drawbacks, the present invention provides adhesive properties between the nonflammable base material and the phenol foam, functions as a covering material, and also improves processability, vibration damping properties, and fire retardant properties, especially under high heat. To provide a fire-resistant and heat-insulating panel which can be carbonized without any change and can fully exhibit its features as a composite structure. The fireproof and heat insulating panel according to the present invention will be explained in detail below using the drawings. FIG. 1 is an explanatory diagram showing an example of a fireproof and heat-insulating panel according to the present invention, in which 1 is a noncombustible base material, such as a metal plate (iron, aluminum, copper), gypsum board, or slate board, and the surface material , functions as a decorative material and backing material. Reference numeral 2 is an isocyanurate foam which is discharged as a raw material onto one side, especially the entire inside surface, of the nonflammable base material 1, and is formed into a bulky foam shape with a high expansion ratio. This isocyanurate foam 2 functions as an adhesive between the nonflammable base material 1 and the phenol foam 3 described later, and also serves as a separation layer to prevent the acidic component of the phenol foam 3 from coming into contact with the nonflammable base material 1, and It also functions as a cushioning material and a heat insulating material to prevent impact from the nonflammable base material 1 from propagating to the phenol foam 3. Furthermore, the phenol foam 3 is made by foaming a resol type phenolic resin stock solution, and has fire resistance, heat insulation properties, and a certain degree of adhesiveness. To explain further, the composition of Phenol Foam 3 consists of a resin, a foaming agent, a foam stabilizer, a hardening agent, and a surfactant.
It is 2000cps/25℃. In addition, as a blowing agent, for example, a freon-based volatile compound that vaporizes at the reaction temperature of the resin, specifically Freon 1
1. One or more of Freon 12 and Freon 113,
Preferably, two or more types are used in a 1:1 ratio, or a mixture thereof in an appropriate ratio. Silicone-based foam stabilizers and surfactants are mainly used. In addition, the curing agent is a strong acid or a substance that reacts with phenolic OH groups, such as phenolsulfonic acid,
These include aromatic sulfonic acids such as sulfuric acid, boric acid, phosphoric acid, benzenesulfonic acid and toluenesulfonic acid, sulfonated novolak resins, phenolsulfonic acid, urea formaldehyde condensates, diisocyanates, and the like. To explain further, the phenol foam 3 is formed by discharging the raw materials during the reaction and foaming of the isocyanurate foam 2, bringing them into contact in a liquid state, and stacking them. The boundary layer becomes entangled, and the voids in the foamed structure of the phenol foam 3 are filled with a portion of the foamed isocyanurate foam 2,
The contact area of both foams becomes large, making full use of their mutual self-adhesion, and the isocyanurate foam 2 is able to fill the voids of the phenol foam 3 in the boundary layer, and the mechanical properties are achieved by entanglement. There is a positive bond (anchor effect) and the adhesive strength increases. Further, since the isocyanate group of the isocyanurate form 2 and the resin of the phenol form 3 react and bond to form a mixed state, the adhesive strength is further improved. Furthermore, at high temperatures, the isocyanurate foam 2 changes into a carbonized layer, which contributes to improving the fire retardancy as well as the fire retardance of the phenol foam 3. Next, an example will be described. Regarding the Examples and Comparative Examples, the resin of Phenol Form 3 is a resol type resin with a brown liquid appearance, a viscosity of 1800 cps/20°C, a non-volatile content of 73 to 85%, a free phenol of 4.6%, a free formalin of 0.1%, and a moisture content of 7. ~8%, specific gravity 1.1~1.3 (20℃)
100 parts by weight of a raw material consisting of 100 parts by weight, silicone as a foam stabilizer (trade name: Tween #80, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.)
2 parts by weight of 20 parts by weight of a 50/50 mixture of Freon 11 and Freon 113 as a blowing agent, 25 parts by weight of a mixed aqueous solution of paratoluenesulfonic acid and phosphoric acid as a hardening agent, and Each component was premixed, and a curing agent was mixed uniformly with this to prepare a foaming stock solution. Therefore, a 0.27 mm colored galvanized iron plate heated to 60° C. was prepared as the nonflammable base material 1, and a raw material for polyisocyanurate foam was applied to the back side of the plate using a spray gun as described below. Next, the foaming raw material of phenol foam 3 was discharged from the mixer onto the raw material of isocyanurate foam 2 in the middle of the reaction, and a sheet-like material laminated with asbestos paper (0.15 mm) and aluminum foil (0.1 mm) was laminated on top of it. ,
It was extended through Nipprol, etc., and then sent to a cure oven (60°C) and cured for about 2 minutes. The fire-resistant and heat-insulating panels manufactured in this way have a foam density of 19Kg/m ³ , a compressive strength of 0.7Kg/cm ² , and a water absorption capacity of 19Kg/m 3 .
The weight was 0.02 g/cm ³ and the total thickness was 20 mm. The blending ratio and structure are shown below. Note that the same material was used as the phenol foam raw material. In the comparative example, a polyurethane resin was used as an adhesive between the nonflammable base material 1 and the phenol foam 3.

[Table] The material of the isocyanurate foam 2 of the separation layer 1 used in the examples was Millionate MR-100.
(manufactured by Nippon Polyurethane Co., Ltd.) 111 parts by weight of polyol (functional group 4, molecular weight 498,
OHV = 498, equivalence ratio 498, raw material mixed with trimerization catalyst, formed into a foam 2
The adhesive strength of colored galvanized iron plate, which is a non-combustible base material 1, is
Cut into a 150mm x 150mm square, drill a round hole with a diameter of 5mm in the center, and heat this iron plate to 60℃.
A polyisocyanurate foam raw material and a phenol foam raw material were discharged in this order, and a colored iron plate (with an aminoalkyd resin decorative coating) was laminated on top of this, the thickness of the entire foam was controlled to be 10 mm, and the foam was cured and cured. Afterwards, the hook of a spring scale was hooked into the round hole of the colored galvanized iron plate, and the adhesive force between the colored galvanized iron plate, the isocyanurate foam 2, and the phenol foam 3 was measured. 3 is JIS-K-
5400-70, and the results were determined after approximately 500 hours. In No. 4, polyurethane resin was applied in the form of a film, and the phenol foam raw material was also immediately discharged, resulting in a separation layer being interposed. In addition, it seems that the value of 5 decreased as a result of the reaction system of the polyurethane resin being disturbed by the water content of the phenolic resin. Next, this fire-resistant and heat-insulating panel is manufactured according to JIS-A-1322
A quasi-noncombustibility test (drilling) was conducted. The results are shown below.

[Table] From the above results, both the comparative examples and the examples pass the test as quasi-noncombustible materials, but there are significant differences in their properties. In addition, after the test, the face material was removed and its cross section was observed. In all Examples, a carbonized layer made of polyisocyanurate foam 2 was reliably formed between the colored galvanized iron plate and the phenol foam 3 to protect the phenol foam 3. Moreover, the carbonized layer and the phenol foam 3 were adhered to each other without being separated. On the other hand, in the comparative example, the polyurethane resin layer that existed between the colored galvanized iron plate and the phenol foam was completely burnt and no longer existed, and the phenol foam was in a state where it fell off. Furthermore, when gypsum board was used as the non-combustible base material 1, the adhesive strength was superior to that when colored galvanized iron plates were used, and the results of the quasi-non-combustible test also showed almost the same values as in the above example. . Of course, when polyurethane resin was used for the separation layer, it burned, and the gypsum board paper also burned, resulting in a failure. What has been described above is only one embodiment of the fireproof and heat insulating panel according to the present invention, and the Phenol Foam 3
It is also possible to provide the above structure on both sides. As described above, according to the fire-resistant and heat-insulating panel of the present invention, since the isocyanurate foam is interposed between the non-combustible base material and the phenol foam, the acidic component used as the curing agent for the phenol foam and the non-flammable base material are Non-combustible base materials can be prevented from rotting without contact. In addition, the isocyanurate foam is made into a foam, and the phenol foam is discharged and laminated with the raw material when the isocyanurate foam is in the process of reaction and foaming, so the boundary layer of both foams interlocks, and the isocyanurate fills the voids in the foamed structure of the phenol foam. A part of the foam becomes a filled foam structure, and both foams have self-adhesive properties and are bonded by reaction, which strengthens the adhesion. In addition, the cushioning properties of the isocyanurate foam suppress the propagation of vibrations to the phenol foam, and it also shows excellent properties in quasi-nonflammability tests.Furthermore, in the event of a fire, a carbonized layer is formed between the nonflammable base material and the phenol foam. It forms reliably and has excellent fire retardant properties.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a typical example of a fireproof and heat-insulating panel according to the present invention. 1... Nonflammable base material, 2... Isocyanurate foam, 3... Phenol foam.

Claims (1)

[Scope of utility model registration request] In a fire-resistant, heat-insulating panel in which a separation layer is interposed between a noncombustible base material and phenol foam, isocyanurate foam is used as the separation layer, and the boundary layer between the isocyanurate foam and the phenol foam is in an unfoamed liquid state. 1. A fire-resistant and heat-insulating panel, characterized in that it is formed into a foamed structure in which a portion of the isocyanurate foam foamed is filled into the voids in the foamed structure of the phenol foam when the two are in contact with each other.