JP2002047749A - Fire resistive partition wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire resistive partition wall exhibiting excellent fire resistance efficiency by forming a fire resistive heat insulating layer without drop out of a foamed thermal expansion fire resistive sheet from the adherend even if the thermal expansion fire resistive sheet is slowly heated. SOLUTION: A laminated body 4 laminating inorganic heat insulating materials 2 and 2 on both sides of the thermal expansion fire resistive sheet 1 is placed between fire resisting coated materials 3 and 3 to use an integral forming one for the fire resistive partition wall.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a fire-resistant partition wall.

[0002]

2. Description of the Related Art Conventionally, buildings (three-story buildings, hospitals, hotels, boarding houses, etc.) having three stories or more have to be provided with a fire-resistant structure having a predetermined fire-resistant performance based on the Building Standard Law. In a refractory structure, a material or a structure having fire resistance is used for a ceiling material, a partition wall, a floor material, and the like. For example, in order to satisfy the fire resistance performance for one hour with the inorganic insulating material alone, the inorganic insulating material is melted and shrunk by heating.
It is necessary to use a high density one, which is disadvantageous in cost.

[0003] Examples of a refractory partition wall having a refractory performance for one hour include a refractory face material such as a calcium silicate plate laminated on both sides of a metal stud.
However, since the thickness of the calcium silicate plate used for the partition wall needs to be 15 mm or more,
There has been a problem that the total weight of the partition wall becomes heavy, and the handleability is deteriorated.

[0004] As a countermeasure against the above-mentioned problems, a partition wall which satisfies the fire resistance performance for one hour and has a thinner total thickness and a lighter weight than conventional partition walls has been studied. As shown in a schematic cross-sectional view in FIG. 3, the partition wall has an inorganic heat insulating material 12 as a core material, and is provided on both sides of the core material.
The laminated body in which the heat-expandable refractory sheets 11, 11, the iron plates 14, 14, and the fire-resistant face materials 13, 13 are sequentially laminated is arranged and integrated with the heat-expandable fire-resistant sheet 11 inside. The heat-expandable fire-resistant sheet 11 burns and expands by heating such as a fire to form a non-combustible fire-resistant heat-insulating layer, and exhibits fire-resistant performance.

However, in the configuration shown in FIG. 3, there is a gap between the heat-expandable refractory sheet 11 and the inorganic heat-insulating material 12, and the surface on which the heat-expandable refractory sheet 11 is adhered is the iron plate 1
In the case of No. 4, if heated slowly, the foamed heat-expandable refractory sheet 11 may fall off from the surface to which it is adhered, and there is a problem that sufficient refractory performance is not exhibited.

[0006]

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a foamed heat-expandable refractory sheet which does not fall off from the surface to be adhered even when the heat-expandable refractory sheet is slowly heated. Provided is a fire-resistant partition wall which forms a heat insulating layer and exhibits excellent fire resistance performance.

[0007]

The fire-resistant partition wall according to the present invention comprises a laminate in which an inorganic heat insulating material is laminated on both sides of a heat-expandable fire-resistant sheet between fire-resistant coating materials. It is characterized by the following.

As shown in the schematic sectional view of FIG. 1, the fire-resistant partition wall of the present invention comprises a heat-expandable fire-resistant sheet 1 having a laminated body 4 in which inorganic heat insulating materials 2 and 2 are laminated on both sides. It has a configuration arranged between the coating materials 3 and 3 to be integrated.

When the fire-resistant partition wall 4 is constructed between a ceiling and a wall, for example, as shown in FIG. 2, a fire-resistant partition wall is provided on both sides of a runner 24 attached to a ceiling 21 and a floor 22 by a runner fixing tool 23. Fix 4 and 4 respectively. The fixing of the refractory partition wall 4 and the runner 24 includes, for example, a method of fastening a tapping screw (not shown) penetrating the refractory partition wall 4 from the refractory coating material 3 side of the refractory partition wall 4.

[0010] In the partition wall of the present invention, the heat-expandable refractory sheet expands due to the heating of a fire or the like to form a combustion residue, and the combustion residue becomes a fire-resistant heat-insulating layer, thereby improving the fire resistance performance.

The heat-expandable refractory sheet has a thickness of 50 kW / m ^2.
The thickness change (thickness after irradiation D ₁ / thickness before irradiation D ₀ ) when irradiating 30 minutes of heat is preferably 3 to 100 (times). If the thickness change (D ₁ / D ₀ ) before and after irradiation is less than 3 (fold), the fire resistance is insufficient, and if it exceeds 100 (fold), the strength of the fire-resistant heat-insulating layer formed by expansion due to heating decreases. And it becomes easy to collapse.

As the above-mentioned heat-expandable fire-resistant sheet, a fire-resistant heat-insulating layer is formed by heating in a fire or the like, thereby exhibiting fire resistance.
There is no particular limitation as long as the change in thickness (D ₁ / D ₀ ) before and after irradiation is within the above range.

The heat-expandable refractory sheet includes a resin composition (I) containing a thermoplastic resin and / or a rubber substance and a heat-expandable inorganic substance, or a resin composition containing an epoxy resin and a heat-expandable inorganic substance. Those formed from (II) are preferred. Examples of the heat-expandable inorganic substance include neutralized heat-expandable graphite and vermiculite.

The resin composition (I) is preferably composed of a thermoplastic resin and / or a rubber substance, neutralized heat-expandable graphite and an inorganic filler.

The thermoplastic resin and / or rubber substance is not particularly limited. For example, a polypropylene resin,
Polyolefin resins such as polyethylene resins, poly (1-) butene resins and polypentene resins; polystyrene resins, acrylonitrile-butadiene-styrene resins, polycarbonate resins, polyphenylene ether resins, acrylic resins, polyamide resins , Polyvinyl chloride resin, phenolic resin, polyurethane resin, polybutene, polychloroprene, polybutadiene,
Examples thereof include polyisobutylene, butyl rubber, and nitrile rubber, which may be used alone or in combination of two or more.

The thermoplastic resin and / or rubber substance may be used alone or in combination of two or more. A blend of two or more resins may be used as the base resin in order to adjust the melt viscosity, flexibility, adhesiveness, and the like of the resin.

The thermoplastic resin and / or rubber substance may be further crosslinked or modified within a range that does not impair the fire resistance of the heat-expandable fire-resistant sheet of the present invention.
The method for cross-linking the thermoplastic resin and / or rubber substance is not particularly limited, and a cross-linking method generally performed for the thermoplastic resin or rubber substance, for example, a cross-linking method using various cross-linking agents or peroxides, an electron beam, A cross-linking method by irradiation and the like can be mentioned.

The neutralized heat-expandable graphite is obtained by neutralizing heat-expandable graphite which is a conventionally known substance. The heat-expandable graphite is a natural scale-like graphite, pyrolytic graphite, powder such as quiche graphite,
Produced by treating with inorganic acids such as concentrated sulfuric acid, nitric acid, and selenic acid and strong oxidizing agents such as concentrated nitric acid, perchloric acid, perchlorate, permanganate, dichromate, and hydrogen peroxide. It is a graphite intercalation compound that is a crystalline compound while maintaining a layered structure of carbon.

The heat-expandable graphite obtained by the acid treatment as described above is further neutralized by neutralizing with ammonia, an aliphatic lower amine, an alkali metal compound, an alkaline earth metal compound, or the like. The heat-expandable graphite is used.

The aliphatic lower amine is not particularly restricted but includes, for example, monomethylamine, dimethylamine,
Trimethylamine, ethylamine, propylamine, butylamine and the like. The alkali metal compound and the alkaline earth metal compound are not particularly limited,
For example, hydroxides, oxides, carbonates, sulfates, organic acid salts of potassium, sodium, calcium, barium, magnesium and the like can be mentioned.

The particle size of the neutralized heat-expandable graphite is preferably 20 to 200 mesh. When the particle size is smaller than 200 mesh, the degree of expansion of graphite is small, a predetermined refractory insulation layer cannot be obtained, and when the particle size is larger than 20 mesh, there is an advantage that the degree of expansion of graphite is large,
When kneaded with a thermoplastic resin and / or a rubber substance, dispersibility deteriorates, and deterioration of physical properties cannot be avoided.

Commercial products of the above-described neutralized heat-expandable graphite include, for example, “Frame Cut GRE” manufactured by Tosoh Corporation.
P-EG "," GRAFG "manufactured by UCAR Carbon
UARD ”and the like.

The inorganic filler is not particularly limited.
For example, metal oxides such as alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, and ferrites; calcium hydroxide, magnesium hydroxide, aluminum hydroxide, hydrotalcite, and the like. Hydrous inorganic substances; Basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, strontium carbonate, barium carbonate and other metal carbonates; calcium salts such as calcium sulfate, gypsum fiber and calcium silicate; silica, diatomaceous earth, dawsonite, barium sulfate ,
Talc, clay, mica, montmorillonite, bentonite, activated clay, sepiolite, imogolite, sericite, glass fiber, glass beads, silica-based balun, aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balun , Charcoal powder, various metal powders, potassium titanate, magnesium sulfate "MOS" (trade name), lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag fiber , Fly ash, dewatered sludge and the like. These may be used alone or in combination of two or more.

As the above-mentioned inorganic filler, a combination of a hydrated inorganic substance and a metal carbonate is particularly preferred. Since the above-mentioned hydrated inorganic substance and metal carbonate function as an aggregate, it is considered that they contribute to the improvement of residue strength and the increase of heat capacity.

Further, the above-mentioned hydrated inorganic substance is endothermic due to water generated by the dehydration reaction at the time of heating, and the temperature rise is reduced to obtain high heat resistance. Also, oxide remains as a heating residue. This is particularly preferable in that it works as an aggregate to improve the residue strength. Among them, magnesium hydroxide and aluminum hydroxide have different temperature ranges in which the dehydrating effect is exhibited, so when used in combination, the temperature range in which the dehydrating effect is exhibited becomes wider, and a more effective temperature rise suppressing effect is obtained, so that the combination is used. Is preferred.

Further, the above-mentioned metal carbonates such as calcium carbonate and zinc carbonate are considered to promote expansion by a reaction with the phosphorus compound when a phosphorus compound described later is used in combination. In particular, ammonium polyphosphate is used as the phosphorus compound. When used, a high expansion effect is obtained. In addition, it acts as an effective aggregate and forms a residue having high shape retention after burning.

The particle size of the inorganic filler is 0.5 to
100 μm is preferable, and more preferably, about 1 to 50 μm.
m. Further, it is more preferable to use a combination of an inorganic filler having a large particle size and a small filler having a small particle size. By using the combination, it is possible to achieve high packing while maintaining the mechanical performance of the sheet. .

Commercial products of the above-mentioned hydrous inorganic substances include, for example, aluminum hydroxide such as "Heidilite H-42M" having a particle size of 1 μm (manufactured by Showa Denko KK) and "Hijilite H-31" having a particle size of 18 μm (Showa Denko) Electric Works Co., Ltd.).

Commercially available calcium carbonate products include, for example, "Whiteton SB Red" having a particle size of 1.8 μm (manufactured by Shiraishi Calcium Co., Ltd.) and "Whiteton BF30 having a particle size of 8 μm.
0 "(manufactured by Bihoku Powder Chemical Co., Ltd.).

The resin composition (I) may contain a phosphorus compound. The phosphorus compound is not particularly limited and includes, for example, red phosphorus; various phosphate esters such as triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, xylendiphenyl phosphate; sodium phosphate; Metal phosphate salts such as potassium phosphate and magnesium phosphate; ammonium polyphosphates; and compounds represented by the following general formula (1). Among these, from the viewpoint of fire resistance, red phosphorus, ammonium polyphosphates, and compounds represented by the following general formula (1) are preferable, and ammonium polyphosphates are more preferable in terms of performance, safety, cost, and the like. preferable.

[0031]

Embedded image

In the formula, R ¹ and R ³ are hydrogen, C ¹ -C 1
It represents a 16 linear or branched alkyl group or an aryl group having 6 to 16 carbon atoms. R ² is a hydroxyl group, a linear or branched alkyl group having 1 to 16 carbon atoms, a linear or branched alkoxyl group having 1 to 16 carbon atoms,
Represents an aryl group having 6 to 16 carbon atoms or an aryloxy group having 6 to 16 carbon atoms.

The flame retardant effect is improved by adding a small amount of the above-mentioned red phosphorus. As the red phosphorus, commercially available red phosphorus can be used, but from the viewpoint of moisture resistance, safety such as not spontaneously igniting during kneading, those obtained by coating the surface of red phosphorus particles with a resin are preferably used. .

The ammonium polyphosphates are not particularly limited, and include, for example, ammonium polyphosphate and melamine-modified ammonium polyphosphate. Of these, ammonium polyphosphate is preferably used from the viewpoint of handleability. Commercially available products include, for example, “EXOLIT AP422” and “EXOLIT AP” manufactured by Clariant.
462 ", Sumitomo Chemical Co., Ltd." Sumisafe P ", Chisso Corporation" Terage C60 "," Terage C70 ",
"Terage C80" and the like.

The compound represented by the above general formula (1) is not particularly restricted but includes, for example, methylphosphonic acid, dimethyl methylphosphonate, diethyl methylphosphonate, ethylphosphonic acid, propylphosphonic acid, butylphosphonic acid, 2-methylpropyl Phosphonic acid, t-butylphosphonic acid, 2,3-dimethyl-butylphosphonic acid, octylphosphonic acid, phenylphosphonic acid, dioctylphenylphosphonate, dimethylphosphinic acid, methylethylphosphinic acid, methylpropylphosphinic acid, diethylphosphinic acid, dioctyl Examples include phosphinic acid, phenylphosphinic acid, diethylphenylphosphinic acid, diphenylphosphinic acid, and bis (4-methoxyphenyl) phosphinic acid. Among them, t-butylphosphonic acid is expensive, but is preferable in terms of high flame retardancy. The above phosphorus compounds may be used alone or in combination of two or more.

The blending amount of the resin composition (I) with the neutralized heat-expandable graphite is preferably 20 to 500 parts by weight based on 100 parts by weight of the thermoplastic resin and / or rubber substance. If the compounding amount of the neutralized heat-expandable graphite is less than 20 parts by weight, sufficient thermal expansion properties cannot be obtained, and if it exceeds 500 parts by weight, uniform dispersion becomes difficult, so that a uniform thickness is formed. It will be difficult to do.

The compounding amount of the inorganic filler in the resin composition (I) is preferably 50 to 500 parts by weight based on 100 parts by weight of the thermoplastic resin and / or rubber substance. If the amount is less than 50 parts by weight, a fire-resistant expansion sheet having sufficient fire resistance cannot be obtained, and if it exceeds 500 parts by weight, the mechanical properties of the fire-resistant expansion sheet deteriorate.

As the resin composition (II) containing the epoxy resin, a resin composition comprising an epoxy resin, neutralized heat-expandable graphite and an inorganic filler is preferable.

The epoxy resin is not particularly limited, but is basically obtained by reacting a monomer having an epoxy group with a curing agent. Examples of the monomer having an epoxy group include monomers of a bifunctional glycidyl ether type, a glycidyl ester type, and a polyfunctional glycidyl ether type.

Examples of the bifunctional glycidyl ether type monomers include, for example, polyethylene glycol type, polypropylene glycol type, neopentyl glycol type, 1,6-hexanediol type, trimethylolpropane type, propylene oxide-bisphenol A type,
Monomers such as hydrogenated bisphenol A type are exemplified.

Examples of the glycidyl ester type monomer include monomers of hexahydrophthalic anhydride type, tetrahydrophthalic anhydride type, dimer acid type, p-oxybenzoic acid type and the like.

Examples of the polyfunctional glycidyl ether type monomer include monomers such as phenol novolak type, orthocresol novolak type, DPP novolak type, and dicyclopentadiene / phenol type.

These monomers having an epoxy group may be used alone or in combination of two or more.

As the curing agent, a polyaddition type or a catalyst type is used. Examples of the polyaddition type curing agent include polyamine, acid anhydride, polyphenol, and polymercaptan. Examples of the catalyst type curing agent include tertiary amines, imidazoles, Lewis acid complexes and the like.

The method of curing the epoxy resin is not particularly limited, and can be performed by a known method.

The neutralized heat-expandable graphite and inorganic filler used in the resin composition (II) include:
The same components as those used in the resin composition (I) are used.

In the above resin composition (II), if the compounding amount of the phosphorus compound is small, sufficient shape retention of the combustion residue cannot be obtained, and if the compounding amount is too large, the mechanical properties are greatly reduced, and the resin cannot be used. So, epoxy resin 100
50 to 150 parts by weight based on parts by weight is preferred.

In the resin composition (II), if the blending amount of the neutralized heat-expandable graphite is too small, sufficient thermal expansion properties cannot be obtained. Epoxy resin 1
15 to 300 parts by weight per 100 parts by weight is preferred.

In the above resin composition (II), if the amount of the inorganic filler is too small, sufficient fire resistance cannot be obtained, and if the amount is too large, the mechanical properties are greatly reduced and the resin cannot be used. The amount is preferably 50 to 500 parts by weight based on 100 parts by weight of the resin.

The resin composition (II) may contain the same phosphorus compound as used in the resin composition (I).

In the resin composition (II), by using an epoxy resin as the resin, the resin itself forms a char (carbonized) layer upon combustion and forms a fire-resistant heat-insulating layer strong enough to maintain its shape. I do.

In the resin compositions (I) and (II), the neutralized heat-expandable graphite expands by heating to form a refractory and heat-insulating layer, thereby preventing the transmission of flame and heat. By heating, the phosphorus compound dehydrates and foams and acts as a carbonization catalyst. At that time, the inorganic filler contributes to an increase in heat capacity, and the phosphorus compound has a shape retaining ability of the expanded heat insulating layer.

The above-mentioned resin compositions (I) and (II) may be phenol-based, amine-based or resin-based as long as their physical properties are not impaired.
In addition to sulfur-based antioxidants, metal harm inhibitors, antistatic agents, stabilizers, crosslinking agents, lubricants, softeners, pigments, and the like may be added.

The above resin compositions (I) and (II) can be obtained by kneading the above components using a known kneading apparatus such as a Banbury mixer, a kneader mixer, or a two-roll mill. The resin composition can be formed into a heat-expandable refractory sheet by a conventionally known molding method such as press molding, extrusion molding, or calendar molding.

The thickness of the heat-expandable refractory sheet is 0.1
〜5 mm is preferred. When the thickness is less than 0.1 mm, a sufficient thickness of the fire-resistant heat insulating layer is not formed due to thermal expansion, so the fire prevention and fire resistance performance is insufficient. When the thickness exceeds 5 mm, the weight becomes heavy and the fire-resistant heat insulation formed during combustion is formed. The thickness of the layer becomes excessively thick, resulting in excessive quality.

Examples of the fireproof coating material include gypsum board, slate board, calcium silicate board, ALC board,
A PC board, a ceramic board, a concrete board, a board containing a hydrated inorganic substance, a wood chip cement board, or the like is used, and a composite of these may be used. In particular, a slate plate is preferable because of its light weight and high strength.

The thickness of the fireproof coating material is 5 to 15 mm.
Is preferred. When the thickness is less than 5 mm, the auxiliary heat insulating effect and the reinforcing effect are insufficient, and when the thickness is more than 15 mm, the weight becomes heavy and the handleability deteriorates.

As the inorganic heat insulating material, for example, rock wool, glass wool, ceramic blanket, glass mat and the like are used.

In the fire-resistant partition wall of the present invention, the inorganic heat-insulating material is laminated on both sides of the heat-expandable fire-resistant sheet, so that the fire-resistant heat-insulating layer formed by expansion by heating is held by the inorganic heat-insulating material. , Falling off is prevented. When the heat-expandable refractory sheet contains an adhesive component such as butyl rubber, the adhesive may be laminated and fixed using the adhesive force.
If the heat-expandable refractory sheet does not have adhesive strength, it can be bonded using an adhesive. In particular, when the heat-expandable refractory sheet is made of an epoxy resin, if it is laminated with an inorganic heat insulating material before the epoxy resin is cured, the sheet can be adhered at the time of curing.

[0060]

Embodiments of the present invention will be described below with reference to the drawings.

Preparation of heat-expandable refractory sheet The following amounts of butyl rubber, polybutene, epoxy resin, hydrogenated petroleum resin, neutralized heat-expandable graphite, ammonium polyphosphate, aluminum hydroxide, A resin composition composed of calcium is melt-kneaded with two rolls and heat-expandable refractory sheets A, B and C having a predetermined thickness are formed.
I got The thickness when the heat-expandable refractory sheet was irradiated with a heat of 50 kW / m ² for 30 minutes was measured, and the thickness change before and after irradiation (= thickness after irradiation D ₁ / thickness before irradiation D ₀ ).
[Times] were calculated and are shown in Table 1.

[0062]

[Table 1]

The components used in the table are as follows. -Butyl rubber: "Butyl rubber # 06" manufactured by Exxon Chemical
・ Polybutene: "Polybutene 100" manufactured by Idemitsu Petrochemical Co., Ltd.
R "・ Hydrogenated petroleum resin:" ESCOLETS 53 "manufactured by Tonex
20 ”Epoxy resin: Yuka Shell Epoxy

Ammonium polyphosphate: "EXOLIT AP422" manufactured by Clariant Co., Ltd. Neutralized heat-expandable graphite: "GREP" manufactured by Tosoh Corporation
-EG "・ Aluminum hydroxide:" Heidilite H- "manufactured by Showa Denko KK
31 ”・ Calcium carbonate:“ Whiteton BF30 ”manufactured by Bihoku Powder Chemical Co., Ltd.
0 "

(Examples 1 to 6, Comparative Example) A heat-expandable refractory sheet A, B or C was made of glass wool (thickness: 25 mm,
(Size: 1000 mm x 1000 mm, density: 12K)
Or rock wool (thickness: 10 mm, size: 1000
mm × 1000 mm, density: 40K), and a slate plate (thickness: 8 mm) is further laminated on both sides of the laminate so that the total thickness becomes 60 mm and 35 mm, respectively. A fire-resistant partition wall having the configuration shown in FIG. 1 was produced.

Regarding the above-mentioned fire-resistant partition wall, ISO 83
A fire resistance test was performed in accordance with No. 4, and after 1 hour, the back surface temperature of the fire-resistant partition wall was measured, and then a pass / fail judgment was made. In ISO 834, the back surface temperature is (room temperature + 180
° C) or less, it is judged as pass, and when it exceeds (room temperature + 180 ° C), it is judged as reject.

[0067]

[Table 2]

[0068]

The fire-resistant partition wall of the present invention has the above-mentioned structure, and even when heated gently, the fire-resistant heat-insulating layer formed by expanding the heat-expandable fire-resistant sheet is prevented from falling off. It exhibits fire resistance performance that passes the ISO standard fire resistance 1 hour test.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a fire-resistant partition wall of an embodiment.

FIG. 2 is a schematic sectional view showing a method of constructing a fire-resistant partition wall.

FIG. 3 is a schematic sectional view showing a conventional fire-resistant partition wall.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 11 Thermal expansion-resistant fire-resistant sheet 2, 12 Inorganic heat insulating material 3 Fire-resistant covering material 4 Laminate 13 Fire-resistant face material 14 Iron plate

Claims (5)

[Claims] 1. A fire-resistant partition wall, wherein a laminated body in which an inorganic heat-insulating material is laminated on both sides of a heat-expandable fire-resistant sheet is arranged and integrated between fire-resistant coating materials. 2. The heat-expandable refractory sheet according to claim 2, wherein
^2. The fire-resistant partition wall according to claim 1, wherein a change in thickness (thickness D ₁ after irradiation / thickness D ₀ before irradiation) when the heat amount of ² is irradiated for 30 minutes is 3 to 100 (times). . 3. The heat-expandable refractory sheet comprises a resin composition (I) containing a thermoplastic resin and / or a rubber substance and a heat-expandable inorganic substance.
4. The fire-resistant partition wall according to any one of 3. 4. The fire-resistant fire-resistant sheet according to claim 1, wherein the heat-expandable fire-resistant sheet comprises a resin composition (II) containing an epoxy resin and a heat-expandable inorganic substance. Partition walls. 5. The fire-resistant partition wall according to claim 1, wherein the fire-resistant coating is a slate plate.