JP2001098664A - Building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a building which is built in such a way that the joint section formed of the vertical members of adjacent building units is constructed to have watertightness and to prevent flames from passing through the section even when the section is exposed to a fire. SOLUTION: A building is constituted of a plurality of building units and fire-resisting exterior wall materials 1 and 2 are respectively fitted to the outdoor sides of the vertical members 3 and 4 of the units. In addition, a joint material 10 is sealed in the joint section 8 formed of the vertical members 3 and 4 of adjacent building units and, at the same time, a thermally expansible refractory material 7 is stuck to at least one of the side faces 5 and 6 of the vertical members 3 and 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a building comprising a plurality of building units.

[0002]

2. Description of the Related Art In recent years, members used for inner and outer walls of general buildings have been required to have fire resistance and fire prevention performance. In connection with this, the connection part (joint part) of the outer wall is required to have a fireproof and fireproof performance in addition to the conventionally required watertightness. The fireproof and fireproof performance required for the connection portion (joint portion) of the outer wall includes that the flame does not penetrate to the back surface when exposed to the flame.

[0003] Generally, in order to provide a fireproof / fireproof property to a connection portion (joint portion) of an outer wall, a method of applying a fireproof sealant after fitting a backup material such as foamed polyethylene in advance, A method of attaching a gasket having However, when applying a fire-resistant sealant, it is necessary to work at a site where scaffolds are provided throughout the building, and the work requires skills.If the construction is insufficient, the sealant will fall out in the event of a fire. There was a risk of fire piercing. On the other hand, when using a fireproof gasket, it can be constructed relatively easily,
There is a problem that the refractory gasket itself is expensive.

Japanese Patent Application Laid-Open No. H10-140706 discloses a method of attaching an exterior material via a flame-retardant and refractory material having a thermal expansion property. There was a problem of becoming.

[0005]

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide watertightness to joints formed by vertical frame members of building units adjacent to each other, and to provide a flame from joints even when exposed to a flame. It is intended to provide a building that does not penetrate.

[0006]

A building according to the present invention is a building comprising a plurality of building units, wherein a fireproof and fire-resistant outer wall material is attached to the outdoor side of a vertical frame member of the building unit, and adjacent to each other. A joint formed by a vertical frame material of a building unit to be sealed with a joint material, and a heat-expandable refractory material having adhesiveness attached to at least one side surface of the vertical frame material. And the thermal expansion material is 5
The expansion ratio in the thickness direction after heating at 0 kW / m ² for 30 minutes is 3 to 100 times.

Hereinafter, the present invention will be described in detail.

The building of the present invention has a structure in which a plurality of building units are connected in the left-right and up-down directions, and the skeleton of each building unit is arranged at four corners as shown in FIG. It is constituted by a vertical frame member A and a beam member B connected between the vertical frame members. On the outdoor side of the vertical frame material, as shown in an enlarged schematic cross-sectional view of the main part of FIG.
Is attached. In order to fix the above-mentioned fireproof / fireproof outer wall materials 1 and 2 to the vertical frame materials 3 and 4, conventionally known screws, nailing and the like are used. In FIG. 1, reference numeral 9 denotes a screw.

Prior to connection of the building units, at least one side surface 5 or 6 of the vertical frame members 3 and 4 of the adjacent building unit is provided with a thermally expandable refractory material 7 having an adhesive property in advance.
Is affixed. The heat-expandable refractory material 7 fills the joint portion 8 with an adiabatic expansion layer (not shown) formed by burning and expanding at a high temperature at the time of fire, so that the flame penetrates from the joint portion 8. To prevent. Therefore, it is preferable that the heat-expandable refractory material 7 is stuck on the entire surface in the width direction of the vertical frame material on the side surface 5 of the vertical frame material 3 or the side surface 6 of the vertical frame material 4. The sticking length is not particularly limited as long as the flame can be prevented from penetrating from the joint portion 8.

Further, a joint member 10 is sealed on the joint-proof portion 8 provided between the vertical frame members 3 and 4 on the side of the fireproof / fireproof outer wall material.
The joint material 10 is mainly used for the purpose of improving the appearance of the joint portion 8 and imparting watertightness. As a method of sealing the joint material, a method of directly filling the joint portion 8 with a gasket (made of EPDM or the like) or, as shown in FIG. A method in which a sealing material (silicone-based, modified silicone-based, urethane-based, or the like) is sealed after filling joints with “Lightlon rod” manufactured by Kagaku Co., Ltd.).

Examples of the material used for the vertical frame member include rectangular steel pipes, channel steels, C-type ropes, H-type ropes, and various shapes of wood.

As the above-mentioned fire-resistant and fire-resistant outer wall material, a conventionally used known material can be used. For example, ceramic siding (“Moen Excelad” manufactured by Nichiha Corporation) can be used.
Etc.), extruded cement board ("ASLOCK" manufactured by Nozawa)
Etc.), ALC plates ("Hebel" manufactured by Asahi Kasei Corporation) and metal siding.

As the above-mentioned heat-expandable refractory material, a material having an expansion ratio in the thickness direction of 3 to 100 when heated for 30 minutes under a heating condition of 50 kW / m ² is used. When the expansion ratio is less than 3 times, the thickness of the heat-expandable refractory material required for exhibiting sufficient fire resistance increases, and when the expansion ratio exceeds 100 times, the mechanical strength of the adiabatic expansion layer formed by heating is insufficient. I do.

The above-mentioned heat-expandable refractory material is not particularly limited as long as it expands due to heating or the like at the time of fire, and exhibits sufficient fire-resistance performance. A resin composition containing a heat-expandable inorganic compound is preferred because it can easily add functions such as flexibility and adhesiveness.

As the resin component used in the resin composition, a thermoplastic resin and / or a rubber substance or an epoxy resin is preferable. When a sheet-like material of a resin composition containing an epoxy resin and a heat-expandable inorganic compound is used, the heat-expandable refractory material after heat expansion has a cross-linked structure, which is excellent in shape retention, and the thickness of the material itself is thin. Therefore, it is particularly preferably used. Also, thermoplastic resin,
The rubber substance can have a crosslinked structure by a crosslinking method described below.

Examples of the thermoplastic resin include polyolefin resins such as polypropylene resin and polyethylene resin, poly (1-) butene resin, polypentene resin, polystyrene resin, acrylonitrile-butadiene-styrene resin, Polycarbonate resin, polyphenylene ether resin, acrylic resin, polyamide resin, polyvinyl chloride resin, phenol resin, polyurethane resin, etc., may be used alone or in combination of two or more. May be done. Among them, polyolefin resins are preferable, and polyethylene resins are more preferable.

Examples of the polyethylene resin include ethylene homopolymers, copolymers containing ethylene as a main component, mixtures of these (co) polymers, ethylene-vinyl acetate copolymers, ethylene-ethyl An acrylate copolymer, an ethylene-methacrylate copolymer and the like can be mentioned.

Examples of the copolymer containing ethylene as a main component include a copolymer of ethylene containing a ethylene component as a main component and another α-olefin. Examples of the α-olefin include: 1-hexene, 4-methyl-
Examples thereof include 1-pentene, 1-octene, 1-butene, 1-pentene and the like.

Examples of the ethylene homopolymer and the copolymer of ethylene and another α-olefin include Ziegler
Natta catalysts, vanadium catalysts, and those obtained by polymerizing a metallocene compound containing a tetravalent transition metal as a polymerization catalyst may be mentioned. Among them, polyethylene resins obtained using a metallocene compound containing a tetravalent transition metal as a polymerization catalyst are exemplified. preferable.

The tetravalent transition metal contained in the metallocene compound is not particularly restricted but includes, for example, titanium, zirconium, hafnium, nickel, palladium, platinum and the like. A compound in which one or more cyclopentadie rings and their analogs are present as one or more ligands.

Examples of the polyethylene resin obtained by using a metallocene compound containing a tetravalent transition metal as a polymerization catalyst include, for example, "CGCT", "Affinity" and "Engage" manufactured by Dow Chemical; "EXTRACT" manufactured by Exxon Chemical And the like.

Examples of the rubber substance include natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), and 1,2-polybutadiene rubber (1,2-B
R), styrene-butadiene rubber (SBR), chloroprene rubber (CR), nitrile rubber (NBR), butyl rubber (IIR), chlorinated butyl rubber, ethylene-propylene rubber (EPM, EPDM), chlorosulfonated polyethylene (CSM), Acrylic rubber (ACM, ANM),
Epichlorohydrin rubber (CO, ECO), polyvulcanized rubber (T), silicone rubber (Q), fluoro rubber (FKM,
FZ), urethane rubber (U) and the like. Two or more of them may be used in combination to adjust the melting temperature, flexibility, tackiness, and the like of the rubber-based resin.

The above-mentioned halides such as chloroprene rubber are preferable because they themselves have high flame retardancy, crosslink occurs by a dehalogenation reaction by heat, and the strength of the heat-expandable refractory layer is improved.

The thermoplastic resin and the rubber material may be cross-linked or modified as long as the performance of the heat-expandable refractory material is not impaired. The timing of crosslinking or modification is not particularly limited, and a previously crosslinked and modified thermoplastic resin and rubber substance may be used, and the crosslinking is performed simultaneously with the addition of other components such as a phosphorus compound and an inorganic filler described below. Or denaturation. Crosslinking or modification may be performed after blending other components with the thermoplastic resin or rubber substance. The cross-linking and modification may be performed at any stage.

The method of crosslinking the thermoplastic resin and the rubber substance is not particularly limited, and a usual crosslinking method,
For example, various crosslinking agents, a crosslinking method using a peroxide or the like,
A cross-linking method using an electron beam and the like can be mentioned.

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 monomer include, for example, polyethylene glycol type, polypropylene glycol type, neopentyl glycol type, 1,6-hexanediol type, trimethylolpropane type, bisphenol A type and bisphenol F type. And propylene oxide-bisphenol A type and hydrogenated bisphenol A type.

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

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 amines, acid anhydrides, polyphenols, and polymercaptans. Examples of the catalyst-type curing agent include tertiary amines, imidazoles, Lewis acids, Lewis bases, and the like.

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

The epoxy resin may be provided with flexibility, and the following methods can be given as a method of providing flexibility. Increase the molecular weight between crosslinking points. Introduce a soft molecular structure that reduces the crosslink density. Add plasticizer. Introduce an interpenetrating network (IPN) structure. Disperse and introduce rubbery particles. Introduce microvoids.

Is a method in which the distance between the cross-linking points is increased by using an epoxy monomer having a long molecular chain and / or a curing agent in advance to increase flexibility (for example, polypropylenediamine as a curing agent) Etc. are used). Is a method of reducing the cross-linking density in a certain area and developing flexibility by reacting with an epoxy monomer having a small number of functional groups and / or a curing agent (eg, a bifunctional amine as a curing agent, an epoxy monomer Is used as a monofunctional epoxy). Is a method of introducing an epoxy monomer having a soft molecular structure and / or a curing agent to exhibit flexibility (eg, a heterocyclic diamine is used as a curing agent, and an alkylene glycol glycidyl ether is used as an epoxy monomer).

Is a method of adding a non-reactive diluent as a plasticizer (eg, adding DOP, tar, petroleum resin, etc. as a plasticizer). Is an interpenetrating network (IP) that introduces a resin having another soft structure into the crosslinked structure of epoxy resin.
N) This is a method of developing flexibility with a structure. In this method, liquid or granular rubber particles are mixed and dispersed in an epoxy resin matrix (for example, polyester ether or the like is used as the epoxy resin matrix). Is 1 μm
Flexibility is exhibited by introducing the following microvoids into the epoxy resin matrix (eg, a polyether having a molecular weight of 1,000 to 5,000 is added as the epoxy resin matrix).

The above-mentioned thermally expandable inorganic compound is preferably a compound which does not thermally expand at the kneading temperature with the resin but expands at a temperature of 200 ° C. or more. For example, neutralized heat-expandable graphite, vermiculite, kaolin , Mica, borax and the like. Among them, neutralized heat-expandable graphite or vermiculite is preferable.

The above-mentioned thermally expandable graphite is prepared by mixing powders such as natural scale graphite, pyrolytic graphite, and quiche graphite with inorganic acids such as concentrated sulfuric acid, nitric acid and selenic acid, concentrated nitric acid, perchloric acid, perchlorate, and perchlorate. Manganates, dichromates,
It is a graphite intercalation compound generated by treatment with a strong oxidizing agent such as hydrogen peroxide, and is a crystalline compound that maintains a layered structure of carbon.

The thermally 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 limited, and includes, for example, monomethylamine, dimethylamine, trimethylamine, ethylamine, propylamine, butylamine and the like. The alkali metal compound and alkaline earth metal compound are not particularly limited, and include, for example, hydroxides, oxides, carbonates, sulfates, and organic acid salts of potassium, sodium, calcium, barium, magnesium, and the like. .

Commercially available neutralized heat-expandable graphite is, for example, “Frame Cut GRE” manufactured by Tosoh Corporation.
P-EG "," GRAFG "manufactured by UCAR Carbon
urad160 "," GRAFGurad220 "and the like.

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 rubber-based resin, dispersibility deteriorates, and a decrease in physical properties is inevitable.

Commercial products of the above vermiculite include:
For example, Kinseimatic “Vermiculite”
And the like.

A phosphorus compound and an inorganic filler may be added to the above resin composition to further improve the fire resistance.

Examples of the phosphorus compound include red phosphorus; various phosphates such as triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, xylendiphenyl phosphate; sodium phosphate, phosphorus phosphate, and the like. Metal phosphates such as potassium acid 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.

[0044]

Embedded image

In the formula, R ¹ and R ³ are hydrogen, carbon number 1 to
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 above ammonium polyphosphates include
For example, ammonium polyphosphate, melamine-modified ammonium polyphosphate and the like can be mentioned, but ammonium polyphosphate is preferably used from the viewpoint of handleability and the like. As a commercially available product, for example, "Exolit 42" manufactured by Clariant
2, "Exolit 462", "Sumisafe P" manufactured by Sumitomo Chemical Co., Ltd., "Teraj C60", "Teraj C70", "Teraj C80", etc., manufactured by Chisso Corporation.

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 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. Among these, hydrous inorganic substances and metal carbonates are preferred.

The above-mentioned water-containing inorganic substances such as magnesium hydroxide and aluminum hydroxide endothermic due to water generated by a dehydration reaction at the time of heating, and the temperature rise is reduced to obtain high heat resistance. Oxide remains as a residue, which works as an aggregate, which is particularly preferable because the strength of the combustion residue is improved. Magnesium hydroxide and aluminum hydroxide have different temperature ranges in which the dehydrating effect is exhibited, so the combined use expands the temperature range in which the dehydrating effect is exhibited, and a more effective temperature rise suppression effect is obtained. Is preferred.

The above-mentioned metal carbonate is considered to promote expansion by the reaction with the above-mentioned phosphorus compound. In particular, when ammonium polyphosphate is used as the phosphorus compound, a high expansion effect is obtained. In addition, it acts as an effective aggregate and forms a residue having high shape retention after burning.

Among the above metal carbonates, further, alkali metal carbonates such as sodium carbonate; magnesium carbonate;
Preferred are alkaline earth metal carbonates such as calcium carbonate and strontium carbonate; and carbonates of Group IIb metals of the periodic table such as zinc carbonate.

In general, since the above-mentioned inorganic filler functions as an aggregate, it is considered that it contributes to an improvement in residue strength and an increase in heat capacity. The inorganic fillers may be used alone or in combination of two or more.

The particle size of the inorganic filler is 0.5 to
400 μm is preferred, more preferably 1-1.
00 μm. When the amount of the inorganic filler is small, the particle size is preferably small because the dispersibility is greatly affected. However, when the particle size is smaller than 0.5 μm, secondary aggregation occurs to deteriorate the dispersibility. When the amount of the inorganic filler added is large, the viscosity of the resin composition increases as the high filling proceeds and the moldability decreases, but the viscosity of the resin composition may be reduced by increasing the particle size. From the viewpoint that it is possible, those having a large particle size are preferable. However, when the particle size is 4
If it exceeds 00 μm, the surface properties of the molded article and the mechanical properties of the resin composition will decrease.

Examples of the commercially available aluminum hydroxide include "H-42M" having a particle diameter of 1 μm (manufactured by Showa Denko KK) and "H-31" having a particle diameter of 18 μm (manufactured by Showa Denko KK). Commercially available calcium carbonate products include, for example, “Whiteton SB Red” having a particle size of 1.8 μm (manufactured by Bihoku Powder Chemical) and “BF300” having a particle size of 8 μm (manufactured by Bihoku Powder Chemical)
And the like.

The above-mentioned inorganic filler may be used alone.
Two or more kinds may be used in combination. Further, it is more preferable to use a filler having a large particle size and a filler having a small particle size in combination, and by using the filler in combination, it is possible to achieve high filling while maintaining the mechanical performance of the refractory sheet. .

In the above resin composition, the compounding amounts of the neutralized heat-expandable graphite and the phosphorus compound are based on 100 parts by weight of the thermoplastic resin and / or rubber substance or epoxy resin (hereinafter referred to as resin). 2 as the total amount of both
0 to 300 parts by weight is preferable, and the blending amount of the inorganic filler is
The amount is preferably 50 to 500 parts by weight based on 100 parts by weight of the resin component.

If the total amount of the neutralized heat-expandable graphite and the phosphorus compound is less than 20 parts by weight, no adiabatic expansion layer is formed, so that sufficient fire resistance cannot be obtained. Degradation of physical properties is large and cannot be used. More preferably, it is 20 to 200 parts by weight.

When the amount of the inorganic filler is 50,
If the amount is less than parts by weight, sufficient heat resistance cannot be obtained due to a decrease in heat capacity, and if it exceeds 500 parts by weight, mechanical properties are greatly reduced and use is not endurable. More preferably 60 to 30
0 parts by weight.

The weight ratio of the neutralized heat-expandable graphite to the phosphorus compound [(neutralized heat-expandable graphite)
/ (Phosphorus compound)] is preferably from 0.01 to 9. The weight ratio of the neutralized heat-expandable graphite to the phosphorus compound is
By setting it to 0.01 to 9, it becomes possible to obtain the shape-retaining property and high fire resistance of the adiabatic expansion layer. If the compounding ratio of the neutralized heat-expandable graphite is too large, the expanded graphite will be scattered during combustion, and a sufficient adiabatic expanded layer will not be formed. On the other hand, if the compounding ratio of the phosphorus compound is too large, the expansion ratio of the adiabatic expansion layer becomes small, and sufficient fire resistance cannot be exhibited.

In order to impart tackiness to the heat-expandable refractory material, for example, a tackifier may be added to the resin composition. The tackifier is not particularly limited, for example,
Examples include tackifying resins, plasticizers, oils and fats, and low-polymerized polymers.

Examples of the tackifying resin include rosin, rosin derivative, dammar, copal, cumarone-indene resin, polyterpene, non-reactive phenol resin,
Alkyd resin, petroleum hydrocarbon resin, xylene resin,
Epoxy resins and the like can be mentioned.

It is difficult for the plasticizer alone to impart tackiness to the heat-expandable refractory material, but when used in combination with the tackifier resin, the tackiness can be further improved. Examples of the plasticizer include a phthalate ester plasticizer, a phosphate ester plasticizer, an adipate ester plasticizer, a sabacate ester plasticizer, a ricinoleate ester plasticizer, a polyester plasticizer, and an epoxy plasticizer. Agents, chlorinated paraffins and the like.

The above fats and oils have the same action as plasticizers, and can be used for the purpose of imparting plasticity and as a tackifier. Examples of the fats and oils include animal fats and oils, vegetable fats and oils, mineral oils, and silicones. Further, the above-mentioned low molecular weight polymer can be used for the purpose of improving cold resistance, adjusting fluidity, etc., in addition to imparting tackiness. Examples of the high polymer low polymer include a low polymer of those exemplified above as the rubber substance and a low polymer of a poly (1-) butene resin.

A flame retardant, an antioxidant, a metal damage inhibitor, an antistatic agent, a stabilizer, a cross-linking agent, a lubricant, a softener, a pigment, etc. are added to the above resin composition as long as the physical properties are not impaired. You may.

The above-mentioned resin composition is obtained by melt-kneading the above-mentioned components using a known kneading apparatus such as a single-screw extruder, a twin-screw extruder, a Banbury mixer, a kneader mixer, a two-roller and a raikai machine. The obtained resin composition can be formed into a sheet of a heat-expandable refractory material by a conventionally known method such as press molding, extrusion molding, or calendar molding.

The above-mentioned heat-expandable refractory material may be laminated with a supporting material such as a metal plate, a resin film, paper, or a nonwoven fabric. By laminating with the support material subjected to the release treatment, it can be wound up in a tape shape, which is convenient for storage and transportation. The method of laminating the support material is not particularly limited as long as it can be integrated using adhesiveness or tackiness at room temperature. For example, adhesion by an adhesive or WO 98/317
According to the self-adhesiveness of the fire-resistant sheet-shaped molded product described in JP-A No. 30-300, a method of integrating them can be mentioned.

The thickness of the tape-shaped heat-expandable refractory material is as follows:
Although not particularly limited, 0.2 to 3 mm is preferable. If the thickness is less than 0.2 mm, it is difficult to prevent the penetration of the flame to the back surface of the heat-expandable refractory material, and if it exceeds 3 mm, the cost is increased, which is not preferable.

As a commercially available product of the heat-expandable refractory used in the present invention, for example, "Fire Barrier" (a sheet material composed of a resin composition containing chloroprene rubber and vermiculite, expansion ratio: 3 times) Thermal conductivity:
0.20 kcal / m · h · ° C.), “Meghicut” (manufactured by Mitsui Kinzoku Paint Co., Ltd.) (a sheet material composed of a resin composition containing a polyurethane resin and thermally expandable graphite, expansion ratio in the thickness direction: 4 times, thermal conductivity) ： 0.21kcal / m ・ h ・
° C). Since these materials do not have tackiness on the sheet itself, a resin having tackiness (for example, a mixture of butyl rubber and polybutene) is laminated or an adhesive (chloroprene, urethane, acrylic, etc.) is applied to the surface. By applying the composition to a nonwoven fabric, a thermally expandable refractory material having adhesiveness can be obtained.

"Taikarito" manufactured by Nippon Paint Co., Ltd.
(A coating material containing an acrylic ester-styrene copolymer containing ammonium polyphosphate as an expanding agent as an organic binder, expansion ratio in the thickness direction: 30 times, thermal conductivity: 0.1.
After applying a refractory paint such as 09 kcal / m · h · ° C.) once on a polyethylene film or the like and drying it, an adhesive resin (for example, a mixture of butyl rubber, polybutene, etc.) is laminated in the same manner as the above materials. Alternatively, by applying an adhesive (chloroprene-based, urethane-based, acrylic-based, etc.) to the surface, it can be used as a heat-expandable refractory material having tackiness.

Further, a fire-resistant sheet-like molded product described in WO 98/31730 (a sheet-like molded product of a resin composition containing butyl rubber, polybutene, a low molecular petroleum resin and thermally expandable graphite, an expansion ratio in the thickness direction) : 8 times, thermal conductivity: 0.12 kcal / m · h · ° C.), etc., are known as heat-expandable refractory because the sheet itself has adhesiveness.

As the method of sealing the joint, any conventionally known method can be used. For example, the joint is filled with a back-up material (foamed polyethylene, "Lightlon rod" manufactured by Sekisui Chemical Co., Ltd.). A method of applying a sealing material (silicone-based, modified silicone-based, urethane-based, or the like) later, or a method of directly filling a joint with a gasket (eg, made of EPDM) may be used.

[0073]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described specifically with reference to examples, but the present invention is not limited to these examples.

Example 1 As a heat-expandable refractory material,
A 5 mm thick “Fire Barrier” manufactured by 3M (a sheet material made of a resin composition containing chloroprene rubber and vermiculite) was used. As shown in the schematic cross-sectional view in which the main part of FIG.
The above-mentioned heat-expandable refractory material 17 previously cut to a width of 50 mm was attached to adjacent side surfaces of vertical frame members (square steel pipes) 13 and 14 having a size of 100 mm x 4.5 mm and a thickness of 4.5 mm.
575mm length x 44 width as fireproof / fireproof outer wall materials 21 and 22
An ALC plate ("Hebel Power Board" manufactured by Asahi Kasei Corporation) having a size of 5 mm x a thickness of 37 mm was fixed using concrete screws 19 such that the distance between joints 16 was 10 mm. Next, a gasket made of EPDM was sealed as a joint material 20 from the fireproof / fireproof outer wall material side to the joint portion 16 to prepare a fireproof test piece. Note that a chloroprene-based adhesive was used for attaching the heat-expandable refractory material.

(Example 2) As a heat-expandable refractory material, 2 m
m-thick "Mijihikatto" (sheet material composed of a resin composition containing polyurethane resin and heat-expandable graphite) manufactured by Mitsui Kinzoku Paint Co., Ltd., and a urethane-based adhesive instead of a chloroprene-based adhesive A fire-resistant test specimen was prepared in the same manner as in Example 1 except that the heat-expandable refractory material was attached to the vertical frame material.

(Examples 3 and 4) After the components shown in Table 1 were kneaded with a kneader to obtain a resin composition, the obtained resin composition was subjected to calender molding to obtain a predetermined thickness of tackiness. After producing a sheet-like heat-expandable refractory material having the same, a refractory test body was produced in the same manner as in Example 1. The heat-expandable refractory material was attached to the fireproof / fire-resistant outer wall material by using the self-adhesive property of the heat-expandable refractory material without using an adhesive.

Example 5 Each component shown in Table 1 was kneaded with a roll to produce a sheet-like thermally expandable refractory material having a predetermined thickness, and then a urethane-based adhesive was used in place of the chloroprene-based adhesive. A fire-resistant test specimen was produced in the same manner as in Example 1 except that the heat-expandable refractory material was attached to the vertical frame material.

(Comparative Example) A fire-resistant test piece was prepared in the same manner as in Example 1 except that no heat-expandable refractory material was used.

The following items were evaluated for the heat-expandable refractory material and the fire-resistant / fire-resistant outer wall obtained in the above Examples and Comparative Examples, and the results are shown in Table 1.

(1) Expansion Ratio in Thickness Direction The thermally expandable refractory material having the thickness of tmm is 10 cm in length × 10 in width.
The test piece cut into cm was heated and burned for 30 minutes using a cone calorimeter (“CONS2A” manufactured by Atlas Co.) set at an irradiation calorie of 50 kW / m ² (corresponding to the combustion conditions during a medium-scale fire). The combustion residue of the intumescent refractory was obtained. The thickness t ₁ of the obtained combustion residue was measured using a caliper, and the expansion ratio (times) in the thickness direction was calculated by the formula t ₁ / t.

(2) Thermal Conductivity The combustion residue of the heat-expandable refractory material obtained in the test of (1) was measured for the thermal conductivity measuring device “HC-0” manufactured by Eiko Seiki Co., Ltd.
73 ”, the thermal conductivity at 25 ° C. was measured.

(3) Fire Resistance Test The back surface temperature of the fire resistance test specimen when heated for 1 hour in accordance with the fire resistance test of JIS A 1304 (in FIG. 3,
The surface temperature at the point indicated by S of the square steel pipe) was measured, and 260
The sample having a temperature lower than ℃ was indicated by ○, and the sample having a temperature higher than 260 ° C was indicated by ×.

[0083]

[Table 1]

The components used in Table 1 are as follows. -Butyl rubber: "Butyl 065" manufactured by Exxon-Liquid polymer: "Polybutene 100" manufactured by Idemitsu Petrochemical Co.
R "・ Low molecular petroleum resin:“ Escollets 5 ”manufactured by Tonex
320 ”・ Epoxy resin:“ Epicoat E80 ”manufactured by Yuka Shell
7, bisphenol F type epoxy monomer ・ Epoxy resin curing agent: “EKFL05” manufactured by Yuka Shell
2 ", diamine-based curing agent-Ammonium polyphosphate:" Exolit 422 "manufactured by Hoechst-Neutralized thermally expandable graphite:" Frame Cut GREP-EG "manufactured by Tosoh-Aluminum hydroxide: manufactured by Showa Denko Heidilight H
-31 "-Calcium carbonate:" Whiteton BF-3 "manufactured by Bihoku Powder Co., Ltd.
00 "

In the fire resistance test, the gasket of the fireproof / fireproof outer wall of the example fell off, but the heat-expandable refractory material expanded and filled the joints, so that the back surface temperature was 260 ° C. or less. On the other hand, in the comparative example, since the gasket was dropped, the back surface temperature reached 360 ° C., which greatly exceeded 260 ° C.

[0086]

The building according to the present invention has the above-described structure. In the event of a fire, the heat-expandable refractory material burns and expands, and the joints between the building units are filled with the adiabatic expansion layer that is the combustion residue. The flame does not penetrate into the back of the fireproof / fireproof outer wall material. Further, since the joints between the building units are filled with the adiabatic expansion layer, the vertical frame member is not heated by the flame at the time of a fire, so that the deformation of the building unit can be prevented. Furthermore, since the heat-expandable refractory material has adhesiveness, it can be pasted in a factory in advance, and can be easily constructed at a construction site.

[Brief description of the drawings]

FIG. 1 is an enlarged schematic cross-sectional view showing a main part of an embodiment of the present invention.

FIG. 2 is an enlarged schematic cross-sectional view showing a main part of another embodiment of the present invention.

FIG. 3 is an enlarged schematic cross-sectional view showing a main part of the fireproof test body.

FIG. 4 is a perspective view showing a skeleton of a building unit.

[Explanation of symbols]

 1,2,21,22 Fireproof / fireproof outer wall material 3,4,13,14 Vertical frame material 5,6 Side surface 7,17 Thermal expansion resistant fireproof material 8,16 Joint part 9,19 Screw 10,20 joint material 11 Backup Lumber

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 2E001 DE01 DE04 FA52 GA12 GA24 GA52 HA21 HA22 HA23 HA32 HA33 HD08 HD11 HE01 JA12 JA14 JA18 JA21 JA22 JA25 JA26 LA04 LA16 MA02 MA06 MA15

Claims (1)

[Claims] 1. A building comprising a plurality of building units, wherein a fireproof / fireproof outer wall material is attached to the outdoor side of a vertical frame member of the building unit, wherein the building is formed by vertical frame members of adjacent building units. Joints are sealed to the joints, and at least one side surface of the vertical frame material is adhered to a heat-expandable refractory material having adhesiveness,
A building characterized in that the heat-expandable refractory material has an expansion ratio in a thickness direction of 3 to 100 times after being heated at 50 kW / m ² for 30 minutes.