JP4220994B2 - Refractory material - Google Patents

Description

  The present invention relates to a fireproof member used for fireproofing and fireproofing applications.

In recent years, fire resistance and fire resistance have been required for members used for the inner and outer walls of general buildings. In connection with this, in addition to the water tightness conventionally required for the connection part (joint part) of the outer wall, anti-fire / fire resistance performance is required.
As the fireproof and fireproof performance required for the connection part (joint part) of the outer wall, there is no penetration of flame to the back surface, and when the joint part is covered with a member, the temperature of the member is 260 ° C. or less. It is necessary to become.

In general, in order to give fireproofing performance to the connecting portion (joint portion) of the outer wall, for example, Japanese Patent Application Laid-Open No. 8-81674 discloses a method of applying a sealant having fire resistance, and Japanese Patent Application Laid-Open No. Hei 8-209891. Discloses a method of attaching a gasket having fire resistance. However, the method of applying the sealant is to work on the site where the entire building is provided with a scaffold. Therefore, the work requires technology, and if the construction is insufficient, the sealant will fall off in the event of a fire and the flame will penetrate. There was a fear.
Moreover, although the method of attaching a gasket can be constructed relatively easily, there is a problem that the gasket having fire resistance itself is expensive.

  In order to provide watertightness, a method of attaching a gasket or sealant as primary waterproofing is adopted, but in order to prevent water from entering due to capillary action, butyl tape is attached to the end of the mouth as secondary waterproofing. In addition, since a method of filling a backup material such as foamed polyethylene is required, there is a problem that the construction becomes very complicated.

  In view of the above, an object of the present invention is to provide a fire-resistant member that can be simultaneously imparted with anti-fire resistance and water resistance to a joint part and is easy to construct.

The refractory member according to the invention of claim 1 (hereinafter referred to as the first invention) has a buffer material layer laminated on one surface of a thermally expandable refractory material layer that can be expanded by heating to form a refractory heat insulating layer, It is a fire-resistant member in which an adhesive layer is laminated on the other surface, and the volume expansion coefficient after heating the thermally expandable fire-resistant material layer for 30 minutes under a heating condition of 50 kW / m ² is 3 to 100 times It is characterized by being.

The refractory member according to the second aspect of the present invention (hereinafter referred to as the second invention) is a thermally expandable refractory material layer and a pressure-sensitive adhesive capable of forming a refractory heat insulation layer by heating on the surface of the cylindrical buffer material. A fire-resistant member in which layers are sequentially laminated, wherein the volume expansion coefficient after heating the thermally expandable refractory material layer for 30 minutes under a heating condition of 50 kW / m ² is 3 to 100 times And

The present invention is described in detail below.
The refractory member of the first invention comprises a laminate in which a buffer material layer is laminated on one surface of a thermally expandable refractory material layer and an adhesive layer is laminated on the other surface, and the refractory member of the second invention is It consists of a laminate in which a thermally expandable refractory material layer and an adhesive layer are sequentially laminated on the surface of a cylindrical cushioning material.

The thermally expandable refractory material is expanded by heating to form a refractory heat insulating layer, and the volume expansion coefficient after being heated for 30 minutes under a heating condition of 50 kW / m ² is 3 to 100 times. There is no particular limitation.
If the thermal expansion refractory material is heated for 30 minutes under a heating condition of 50 kW / m ² and the volume expansion coefficient is less than 3 times, a thick thermal expansion refractory material layer is required to exhibit sufficient fire resistance performance. Therefore, the cost is increased, and if it exceeds 100 times, the strength of the refractory heat-insulating layer formed by expansion due to heating is lowered, so that it tends to collapse.

  Examples of the thermally expandable refractory material include “Fire Barrier” manufactured by 3M (a sheet material made of a resin composition containing chloroprene rubber and vermiculite, volume expansion coefficient: 3 times, thermal conductivity: 0.20 kcal / m. "H.degree. C.", "Mejihi-Cut" manufactured by Mitsui Kinzoku Co., Ltd. (sheet material comprising a resin composition containing polyurethane resin and thermally expandable graphite, volume expansion coefficient: 4 times, thermal conductivity: 0.21 kcal / m. Commercially available products such as h · ° C. can be used, but those composed of thermoplastic resins or epoxy resins and inorganic fillers are preferred.

  Examples of the thermoplastic resin include polyolefin resins such as polyethylene resin, polypropylene resin, poly (1-) butene resin, polypentene resin; polystyrene resin, ABS resin, polycarbonate resin, polyphenylene ether resin, acrylic resin, and the like. Examples thereof include resins, polyamide resins, polyvinyl chloride resins, phenol resins, polyurethane resins and the like.

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

  Examples of the bifunctional glycidyl ether type monomer include polyethylene glycol type, polypropylene glycol type, neopentyl glycol type, 1,6-hexanediol type, trimethylolpropane type, propylene oxide-bisphenol A type, hydrogenated bisphenol. A monomer such as type A is exemplified.

  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 monomers include phenol novolak type, orthocresol novolak type, DPP novolak type, dicyclopentadiene / phenol type monomer, and the like.

  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, and Lewis acid complexes.

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

  Use of the epoxy resin is preferable because the thermally expandable refractory material after expansion has a cross-linked structure and is excellent in shape retention and can reduce the thickness of the thermally expandable refractory material layer.

As for the compounding quantity of the inorganic filler in the said thermally expansible refractory material, 50-400 weight part is preferable with respect to 100 weight part of resin components (thermoplastic resin or epoxy resin).
When the blending amount of the inorganic filler is less than 50 parts by weight, the amount of residue after combustion is reduced, so that a sufficient fireproof heat insulating layer is not formed, and the blending ratio of the combustible material is increased, so that the flame retardancy is lowered. Moreover, when the compounding quantity of an inorganic filler exceeds less than 400 weight part, since the compounding ratio of a resin component will reduce, adhesive force will run short.

Of the inorganic filler, 20 to 350 parts by weight of layered inorganic material is used.
If the amount of layered inorganic material used is less than 20 parts by weight, the expansion ratio will be insufficient, so that sufficient fireproofing and fireproof performance will not be obtained, and if it exceeds 350 parts by weight, the cohesive force will be insufficient. Sufficient strength cannot be obtained.

  The layered inorganic material is not particularly limited as long as it expands when heated, and examples thereof include vermiculite, kaolin, mica, neutralized thermally expandable graphite, and the like. Among these, neutralizing heat-expandable graphite having a low foaming start temperature is preferable.

  The heat-expandable graphite subjected to the neutralization treatment is obtained by neutralizing heat-expandable graphite, which is a conventionally known substance. The above heat-expandable graphite is composed of natural scale-like graphite, pyrolytic graphite, quiche graphite and other inorganic acids such as concentrated sulfuric acid, nitric acid and selenic acid, concentrated nitric acid, perchloric acid, perchlorate and permanganic acid. It is a graphite intercalation compound produced by treatment with a strong oxidizing agent such as salt, dichromate, hydrogen peroxide, etc., and is a crystalline compound that maintains the layered structure of carbon.

  The thermally expandable graphite obtained by acid treatment as described above is further neutralized with ammonia, aliphatic lower amine, alkali metal compound, alkaline earth metal compound, etc. Graphite is used.

The aliphatic lower amine is not particularly limited, and examples thereof include monomethylamine, dimethylamine, trimethylamine, ethylamine, propylamine, and butylamine.
The alkali metal compound and alkaline earth metal compound are not particularly limited, and examples thereof include hydroxides such as potassium, sodium, calcium, barium, and magnesium, oxides, carbonates, sulfates, and organic acid salts. It is done.

  The particle size of the neutralized heat-expandable graphite is preferably 20 to 200 mesh. If the particle size is smaller than 200 mesh, the degree of expansion of graphite is small and a predetermined fireproof heat insulating layer cannot be obtained. If the particle size is larger than 20 mesh, there is an advantage that the degree of expansion of graphite is large, but it is kneaded with a resin binder. In this case, dispersibility deteriorates, and physical properties are inevitably lowered.

  As a commercial item of the said heat-expandable graphite by which the neutralization process was carried out, "GREP-EG" by Tosoh Corporation, "GRAFGUARD" by UCAR CARBON, etc. are mentioned, for example.

  Examples of the inorganic filler other than the layered inorganic material include silica, diatomaceous earth, alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, ferrites, calcium hydroxide, magnesium hydroxide. , Aluminum hydroxide, basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, barium carbonate, dosonite, hydrotalcite, calcium sulfate, barium sulfate, gypsum fiber, calcium silicate, 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 Shokuko, potassium titanate, magnesium sulfate, lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powder, slag fibers, fly ash, and the like. These may be used independently and 2 or more types may be used together.

Among the above inorganic fillers, metal carbonates such as calcium carbonate and zinc carbonate that play an aggregate role in particular; water-containing inorganic substances such as aluminum hydroxide and magnesium hydroxide that give an endothermic effect during heating in addition to the role as an aggregate Is preferred.
The combined use of the hydrated inorganic substance and the metal carbonate is considered to greatly contribute to improving the strength of the combustion residue and increasing the heat capacity.

  Furthermore, the water-containing inorganic substance is endothermic because of the water produced by the dehydration reaction during heating, the temperature rise is reduced and high heat resistance is obtained, and an oxide remains as a heating residue, which is It is particularly preferable in that the residual strength is improved by working as a material. Among them, magnesium hydroxide and aluminum hydroxide have different temperature ranges that exhibit dehydration effects, so when used together, the temperature range that exhibits dehydration effects becomes wider, and more effective temperature rise suppression effects can be obtained. It is preferable to do.

As a particle size of the said inorganic filler, 0.5-100 micrometers is preferable, More preferably, it is about 1-50 micrometers.
In addition, it is more preferable to use a combination of an inorganic filler having a large particle size and a material having a small particle size, and by using the combination, a high filling is achieved while maintaining the mechanical performance of the thermally expandable refractory material layer. It becomes possible.

  As a commercial item of the above-mentioned water-containing inorganic substance, for example, as aluminum hydroxide, “Hijilite H-42M” (manufactured by Showa Denko) having a particle diameter of 1 μm, “Hijilite H-31” (manufactured by Showa Denko KK) having a particle diameter of 18 μm. ) And the like.

  Examples of the commercially available calcium carbonate include “Whiteon SB Red” (manufactured by Shiraishi Calcium Co., Ltd.) having a particle diameter of 1.8 μm, “Whiteon BF300” (manufactured by Bihoku Flour & Chemical Co., Ltd.) having a particle diameter of 8 μm, and the like. .

Furthermore, in order to improve the flame retardancy of the thermally expandable refractory material, a phosphorus compound may be used in combination with the inorganic filler.
Metal carbonates such as calcium carbonate and zinc carbonate are considered to promote expansion by reaction with a phosphorus compound. In particular, when ammonium polyphosphate is used as the phosphorus compound, a high expansion effect is obtained. It also acts as an effective aggregate and forms a highly shape-retaining residue after combustion.

  Examples of the phosphorus compound include red phosphorus; metal phosphates such as sodium phosphate, potassium phosphate, and magnesium phosphate; and ammonium polyphosphates such as ammonium polyphosphate and ammonium melamine-modified polyphosphate.

  Commercially available ammonium polyphosphates include, for example, “Exolit AP422” and “Exolit AP462” manufactured by Clariant Co., Ltd. “Sumisafe P” manufactured by Sumitomo Chemical Co., Ltd .; C80 "and the like.

  The thermally expandable refractory material layer can be obtained by molding a resin composition containing a resin component, an inorganic filler, and the like into a sheet shape by calendar molding, extrusion molding, press molding, or the like.

The buffer material is not particularly limited as long as it has a buffer property, and a material made of a resin foam, a nonwoven fabric or a woven fabric is preferable.
Examples of the resin foam include polyolefin foams such as polyethylene foam and polypropylene foam, polystyrene foam, polyurethane foam, phenol resin foam, and isocyanurate foam. Foam is preferably used. The expansion ratio is preferably in the range of 5 to 100 times.

  As said nonwoven fabric, organic fiber nonwoven fabrics, such as a polyester nonwoven fabric, a polypropylene nonwoven fabric, a polyethylene nonwoven fabric, an acrylic resin nonwoven fabric, and inorganic fiber nonwoven fabrics, such as a ceramic blanket, rock wool, and glass wool, are used suitably, for example. The inorganic fiber nonwoven fabric may be wrapped with a resin film such as polyethylene in order to enhance the adhesion with the thermally expandable refractory material having an adhesive.

  Examples of the woven fabric include organic fiber woven fabrics such as polyester woven fabrics, polypropylene woven fabrics, and acrylic woven fabrics, and inorganic fiber woven fabrics made of ceramic fibers, rock wool fibers, glass fibers, and the like.

  As the above-mentioned pressure-sensitive adhesive, a conventionally known pressure-sensitive adhesive, for example, an acrylic pressure-sensitive adhesive; a pressure-sensitive adhesive obtained by adding a suitable tackifier (such as petroleum resin) to butyl rubber or the like is used.

  In the refractory member of the first invention, a conventionally known method can be used as a method of laminating the heat-expandable refractory material layer and the buffer material layer. For example, the heat-expandable refractory material is extruded onto the buffer material. Examples thereof include a method of coating and laminating, a method of laminating using an adhesive, and the like. In the refractory member of the second invention, the method of laminating the thermally expandable refractory material layer and the buffer material layer is, for example, by co-extrusion of the thermally expandable refractory material and the buffer material and applying heat to the surface of the buffer material. A method of coating an intumescent refractory material is mentioned. The fire-resistant member of the second invention can be easily manufactured and constructed by having a cylindrical cross-sectional shape.

  Examples of the adhesive include chloroprene adhesive and urethane adhesive.

  In the first and second inventions, as a method of laminating the pressure-sensitive adhesive layer on the thermally expandable refractory material layer, a thermally expandable refractory material of a laminate of a thermally expandable refractory material layer and a buffer material layer is used. A method of directly applying and drying a pressure-sensitive adhesive on the layer side; a method of once coating a pressure-sensitive adhesive on a release paper, drying to form a pressure-sensitive adhesive layer, and then transferring and laminating to a thermally expandable refractory material layer . The pressure-sensitive adhesive layer is not necessarily provided on the entire surface of the thermally expandable refractory material layer, and may be provided partially.

  The thickness of the thermally expandable refractory material layer is set according to the width of the joint portion, and is preferably about 1 to 50% of the width of the joint portion. If it is less than 1% of the width of the joint, the fire resistance to prevent the penetration of the flame to the back of the refractory member is reduced, and if it exceeds 50% of the width of the joint, the waterproof performance and fire resistance are good. There is a cost increase.

  The thickness of the buffer material layer is set according to the width of the joint portion, and is preferably about 50 to 300% of the width of the joint portion. When it becomes less than 50% of the width of the joint portion, the buffer function when filling the joint portion is lowered, and when it exceeds 300% of the width of the joint portion, workability when filling the joint portion is lowered.

  As for the thickness of the said adhesive layer, 0.1-2 mm is preferable. If the thickness of the pressure-sensitive adhesive layer is less than 0.1 mm, it is difficult to obtain sufficient waterproofness, and if it exceeds 2 mm, the flame resistance of the fireproof member itself is lowered.

When constructing the fire-resistant member of the first invention on a joint formed by two adjacent outer wall materials, the adhesive layer is bent into a U shape with the adhesive layer as the outside, and the adhesive layer contacts the side surface of the outer wall material. Thus, excellent waterproofness is expressed by filling the joint part.
Moreover, if a fireproof member is affixed to the one outer wall material which forms a joint part previously, construction will become still easier. When the fireproof member of the second invention is applied to the joint part, excellent waterproofness is exhibited by filling the joint so as to be in contact with the side surface of the adhesive layer joint part.

  In the fire-resistant member of the present invention, even when a shock-absorbing material or a joint material (sealing material, gasket, etc.) shrinks due to heat to form a gap, the heat-expandable fire-resistant material layer expands and the fire-resistant heat-insulating layer By forming the gap and filling the gap, excellent fireproof and fireproof performance is expressed.

The fire-resistant member of the present invention has the above-described configuration, so that the heat-expandable fire-resistant material layer expands and fills the joint portion at the time of a fire, so there is no penetration of flame to the back surface and heat propagation is suppressed. Thus, the temperature rise on the back surface can be suppressed.
Moreover, by performing construction so that the adhesive layer is in contact with the joint portion, water tightness can be imparted to the joint portion, and the construction is easy.

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

Thermally expandable refractory materials A and D
The metallocene polyethylene, epoxy resin, curing agent, neutralized heat-expandable graphite, aluminum hydroxide, calcium carbonate, and ammonium polyphosphate having the blending amounts shown in Table 1 are kneaded and roll-expanded to a predetermined thickness. Sheets of refractory materials A and D were obtained.

Thermally expandable refractory materials B and C
3M “Fire Barrier” (a sheet material made of a resin composition containing chloroprene rubber and vermiculite) is used as the thermally expandable refractory material B, and “Mejihikat” manufactured by Mitsui Kinzoku Paint Co., Ltd. is used as the thermally expandable refractory material C. (Sheet material comprising a resin composition containing polyurethane resin and thermally expandable graphite).

Measurement of volume expansion rate Samples obtained by cutting sheets of the above-described thermally expandable refractory materials A, B, C and D into a size of 100 mm × 100 mm were subjected to a calorific value of 50 kW / m ² using an ATLAS corn calorimeter “CONE2”. Was irradiated for 30 minutes to burn and expand to form a refractory heat insulation layer. The expansion ratio in the thickness direction was calculated from the thickness of the obtained refractory heat insulation layer according to the following formula and shown in Table 1.
Expansion ratio (times) in the thickness direction = t / t ₀ , where t is the thickness after expansion, and t ₀ is the thickness before expansion. The expansion ratio in the thickness direction is regarded as the volume expansion coefficient. When the expansion ratio in the thickness direction exceeded 20 times, an iron or aluminum foil box having an inner dimension of 100 mm × 100 mm × height 30 mm was prepared, and a sample was placed under the box for measurement.

Measurement of thermal conductivity of thermally expandable refractory material About the sheet of the above thermally expandable refractory materials A, B, C and D, using a heat insulating material thermal conductivity measuring device “HC-073” manufactured by Eiko Seiki Co., Ltd., 25 ° C. The thermal conductivity of was measured and shown in Table 1.

(Example 1)
After kneading the components of the heat-expandable refractory material A with a kneader, the obtained kneaded product and polyethylene foam are coextruded, and a laminate in which a heat-expandable refractory material layer is coated around a cylindrical polyethylene foam Got the body. Further, an acrylic pressure-sensitive adhesive (“SK1311” manufactured by Soken Chemical Co., Ltd., main component butyl acrylate) is applied and dried on the thermally expandable refractory material layer to form a pressure-sensitive adhesive layer, and the three-layer structure shown in FIG. A refractory member 5 made of a layered laminate (diameter 13 mm) was produced. In FIG. 1, 5a indicates a polyethylene foam (buffer material layer), 5b indicates a thermally expandable refractory material layer, and 5c indicates an adhesive layer.

  Separately, as shown in FIG. 2, two ALC plates ("Dyne Concrete Wall 75" manufactured by Sekisui House Co., Ltd., size: 575 mm long x 445 mm wide x 75 mm thick) 1a, 1b are formed into square steel pipes (size: width 150 mm × height 100 mm × thickness 4.5 mm) 2 and fixed with a concrete screw 4 to provide a joint portion 3 having a width of 10 mm. The adhesive layer 5c of the fireproof member 5 is inserted into the joint portion 3 so as to be in contact with the side surfaces of the ALC plates 1a and 1b to close the joint portion 3, and then an EPDM gasket 6 is formed from the outside of the joint portion 3. Filled and sealed (for joint width 10 mm, insertion depth 30 mm) to obtain a fireproof test specimen.

(Example 2)
After applying a chloroprene adhesive on one side of the sheet of the heat-expandable refractory material B and laminating a polyethylene foam, an acrylic adhesive (“SK1311” manufactured by Soken Chemical Co., Ltd., main component butyl acrylate) is applied on the other side. The pressure-sensitive adhesive layer was formed by coating and drying, and the fireproof member 5 made of the laminate having the three-layer structure shown in FIG. 3 was produced. In FIG. 3, 51a indicates a polyethylene foam (buffer material layer), 51b indicates a thermally expandable refractory material layer, and 51c indicates an adhesive layer.

  As shown in FIG. 4, the fire-resistant member is folded in a U shape so that the pressure-sensitive adhesive layer 51 c is on the outside, and then the pressure-sensitive adhesive layer 51 c is placed on the side surface of the ALC plate on the joint portion 3 similar to that of the first embodiment. After sealing the joint portion 3 by inserting it in contact with the gasket, an EPDM gasket 61 (for joint width 10 mm, insertion depth 30 mm) is filled and sealed from the outside of the joint portion 3, and a fireproof test specimen is attached. Obtained.

(Example 3)
Apply urethane adhesive on one side of the sheet of heat-expandable refractory material C to laminate polyethylene foam, and apply acrylic adhesive (“SK1311”, main component butyl acrylate, manufactured by Soken Chemical Co., Ltd.) on the other side. It dried and formed the adhesive layer and produced the fireproof member 5 which consists of a laminated body of the 3 layer structure shown in FIG. Subsequently, it was inserted in the joint part after bending in a U shape so that the pressure-sensitive adhesive layer of the fire-resistant member was on the outside, and a fire-resistant test body having the same configuration as in Example 2 was obtained.

(Example 4)
After roll kneading the constituents of the heat-expandable refractory material D, the obtained resin composition was formed into a sheet shape with a calendering machine to obtain a sheet of the heat-expandable refractory material D having a width of 60 mm. After applying urethane adhesive on one side of the sheet of this heat-expandable refractory material D and laminating a polyethylene foam, acrylic adhesive (“SK1311” manufactured by Soken Chemical Co., Ltd. (Butyl acrylate) was applied and dried to form a pressure-sensitive adhesive layer having a width of 20 mm, and a refractory member 52 having a three-layer structure at both ends shown in FIG. 5 was produced. In FIG. 5, 52a indicates a polyethylene foam (buffer material layer), 52b indicates a thermally expandable refractory material layer, and 52c indicates an adhesive layer.

  Example 2 After bending the adhesive layer 52c of the fireproof member into a U shape so as to be on the outside, the adhesive layer 52c is inserted into the joint portion so as to contact the side surface of the ALC plate, and the joint portion is closed. A fireproof test specimen having the same configuration was obtained.

(Examples 5 and 6)
After the components of the heat-expandable refractory material A were roll-kneaded, the obtained resin composition was formed into a sheet shape with a calender molding machine to obtain a sheet of the heat-expandable refractory material A having a width of 60 mm. A urethane adhesive is applied to one side of this sheet, and a ceramic blanket (Example 5) (in Example 6, rock wool with aluminum kraft paper is used) is laminated. An acrylic adhesive (manufactured by Soken Chemical Co., Ltd.) is applied to the other side. “SK1311”, the main component butyl acrylate) was applied and dried to form an adhesive layer, and a refractory member having the same three-layer structure as in FIG. 3 was produced.
Subsequently, it was inserted into the joint part after being bent in a U shape so that the pressure-sensitive adhesive layer 51c of the fireproof member was on the outside, and a fireproof test specimen having the same configuration as in Example 2 was obtained.

(Comparative Example 1)
After using only a cylindrical polyethylene foam into the joint part produced in the same manner as in Example 1 without using any sheet of a heat-expandable refractory material, the EPDM product as in Example 1 is further made from the outside of the joint part. The gasket was filled to obtain a fireproof test specimen.

(Comparative Example 2)
Without using any sheet of heat-expandable refractory material, after inserting only rock wool into the joint part produced in the same manner as in Example 1, the same EPDM gasket as in Example 1 was further filled from the outside of the joint part. Thus, a fire resistance test body was obtained.

Fire resistance test For the fire resistance test specimens of the above examples and comparative examples, the back surface temperature when heated for 1 hour in accordance with JIS A 1304 (heated from above in FIG. 2 and measured at the position 7 in FIG. 2). Was measured and shown in Table 2. In the table, those having a back surface temperature of less than 260 ° C. are indicated by ◯, and those having a temperature of 260 ° C. or more by ×.

Waterproof test An acrylic resin plate having a length of 200 mm, a width of 200 mm, and a thickness of 30 mm is installed adjacent to each other so that the joints are spaced by 10 mm, and the joints are similar to the fireproof test specimens of the above-described examples and comparative examples. In this manner, a refractory material and a gasket were arranged.
Next, a rigid vinyl chloride tube having a diameter of 75 mm × length of 600 mm is set up on the acrylic resin plate, sealed with a sealing material so that there is no gap with the acrylic resin plate, and then water is poured into the rigid vinyl chloride tube to a height of 550 mm. The presence of water leakage to the back of the joint was visually observed. In the table, those having no water leakage are indicated by ○, and those having water leakage are indicated by ×.

  In the table, in the examples, the gasket dropped out in the fire resistance test, but the thermally expandable refractory material layer expanded and filled the joint, so the back surface temperature was less than 260 ° C. On the other hand, in the comparative example, the gasket dropped out, the back surface temperature reached 360 ° C., and greatly exceeded 260 ° C. Moreover, in the waterproof test, water leakage to the joint part back side was observed in the examples, whereas water leakage to the joint part back side was observed in the comparative example.

In addition, each component used in the table is as follows.
Metallocene polyethylene: “EG8200” manufactured by Dow Chemical
Epoxy resin: “E807” (bisphenol type epoxy monomer) manufactured by Yuka Shell
・ Curing agent: “EKFL052” (diamine-based curing agent) manufactured by Yuka Shell

-Ammonium polyphosphate: "Exolit 422" manufactured by Clariant
・ Neutralized heat-expandable graphite: “Frame Cut GREP-EG” manufactured by Tosoh Corporation
・ Aluminum hydroxide: “Hijilite H-31” manufactured by Showa Denko KK
・ Calcium carbonate: “Whiteon BF-300” manufactured by Bihoku Flour Chemical Co., Ltd.

・ Polyethylene foam: Sekisui Chemical Co., Ltd. ・ Ceramic blanket: Nichias “Fine Flex Blanket”
・ Rock wool felt: “MG felt” manufactured by NICHIAS (40k, with aluminum kraft paper)

It is a schematic cross section which shows an example of a refractory member. It is a schematic cross section which shows an example of a fireproof test body. It is a schematic cross section which shows another example of a refractory member. It is a schematic cross section which shows another example of a fireproof test body. It is a schematic cross section which shows another example of a refractory member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a, 1b ALC board 2 Square steel pipe 3 Joint part 4 Concrete screws 5, 51, 52 Refractory members 5a, 51a, 52a Buffering material layers 5b, 51b, 52b Thermal expansion refractory material layers 5c, 51c, 52c Adhesive Layer 6, 61 Gasket

Claims (1)

A heat-resistant member formed by laminating a buffer material layer on one surface of a heat-expandable refractory material layer that can be expanded by heating to form a fire-resistant heat insulating layer, and a pressure-sensitive adhesive layer on the other surface. A fireproof member for joints on the outer wall having a volume expansion coefficient of 3 to 100 times after heating the heat-resistant material layer under heating conditions of 50 kW / m ² for 30 minutes is used as the fireproof member for joints on the outer wall. Folding the U-shaped adhesive layer included outside,
Filling the outer wall joint refractory member into joint parts formed by two adjacent outer wall materials so that the adhesive layer contacts the side surface of the outer wall material;
The construction method of the fireproof member for joint parts of an outer wall characterized by having.

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