Refractory resin composition

Abstract

To provide a refractory resin composition in which the residue is hard even when a thermal expansion material is highly filled and that can close the partition penetrating part sufficiently.SOLUTION: Provided is a fire-resistant resin composition used for building fireproof structure that contains (A) a chloroprene rubber-containing resin component, (B) a heat-expandable layered inorganic substance, and (C) at least one selected from a flame retardant, an endothermic agent, and an inorganic filler.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a fire-resistant resin composition, and more particularly to a fire-resistant resin composition having expandability capable of closing a partition penetration part.

Background Art

[0002] In buildings such as apartment houses, office buildings, and schools, partition penetration parts may be provided in partition parts such as walls to pass long insertion bodies such as cables and pipes. When a fire occurs in any compartment, the partition penetration part is required to have a fire prevention structure (fire-resistant structure) to prevent the spread of fire to other compartments. The partition part generally consists of two wall parts, and a hollow wall in which the space between the wall parts is a hollow part is common.

[0003] As a method of making the partition penetration part a fire-resistant structure, for example, a method of filling an amorphous filler such as a fire-resistant putty in the gap between the long insertion body and the through-hole is known. When using an amorphous filler, a cylindrical member made of a refractory material may be disposed between the inside of the through-hole of each wall part and the insertion body (see, for example, Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, when using an amorphous filler for the fireproof treatment of the partition penetration part, there may be variations among workers, and sufficient fire resistance performance may not be obtained. In addition, when installing refractory materials and their accessories, etc. inside the building body, it may not be clear how much (quantity, thickness, length, etc.) they are installed, or it may not be possible to determine whether they are installed as specified. Therefore, in order to confirm whether the refractory materials, etc. are installed as specified, it is necessary to destroy the partition penetration treatment structure and check the internal structure.

[0006] In addition, in order to reduce variations among workers, there is a kit in which members of a predetermined quantity and size are integrated, but there is a tendency for the number of members to be large, and member loss and omission of installation are likely to occur. Also, due to the packaging of each kit, there is also a problem of a large amount of garbage generated.

[0007] In addition, in a partition penetration structure where long insertion bodies such as cables and pipes are inserted inside, when the insertion body is moved after the partition penetration treatment structure is applied, the refractory materials, etc. installed inside may shift from the appropriate positions where they were installed. Also, due to external forces such as earthquakes, the refractory materials, etc. may shift from the appropriate positions where they were installed. In addition, if the refractory material does not expand uniformly but expands unevenly, it may shift or fall off from the appropriate position where it was installed. Thus, due to the shift of the refractory materials, etc. from the appropriate positions where they were installed, it becomes difficult to exhibit the fire resistance performance desired for the fireproof structure of the partition penetration part.

[0008] Regarding the above problems, a method of installing a sheet made of a high-expansion material at the partition penetration part without using an amorphous filler inside the building body can be considered. A sheet made of a high-expansion material can be obtained, for example, by highly filling a thermal expansion material, and when a fire occurs, it expands by the flame, closes the partition penetration part, and can suppress the spread of fire. However, by highly filling the thermal expansion material, the residue of the sheet tends to become brittle and may be blown away by the flame or the like. Therefore, there are cases where the partition penetration part cannot be sufficiently closed and the spread of fire cannot be suppressed. Therefore, the present invention aims to provide a fire-resistant resin composition that, by highly filling a thermal expansion material, closes the partition penetration part when a fire occurs, suppresses the spread of fire, and can maintain the closure of the partition penetration part even when the thermal expansion material is highly filled because the residue is hard.

Means for Solving the Problems

[0009] The present invention has been made to solve the above problems, and the gist of the present invention is as follows. [1] A fire-resistant resin composition for use in a fireproof structure of a building, containing (A) a resin component containing chloroprene rubber, (B) a thermally expandable layered inorganic substance, and (C) a fire-resistant additive containing at least one selected from a flame retardant, a heat absorbent, and an inorganic filler. [2] The fire-resistant resin composition according to [1] above, wherein the content of the (B) thermally expandable layered inorganic substance is 50 to 1000 parts by mass with respect to 100 parts by mass of the (A) resin component. [3] The fire-resistant resin composition according to [1] or [2] above, wherein the content of the (B) thermally expandable layered inorganic substance is 15 to 75 parts by mass with respect to 100 parts by mass of the fire-resistant resin composition. [4] The fire-resistant resin composition according to any one of [1] to [3] above, wherein the thermal expansion start temperature of the (B) thermally expandable layered inorganic substance is 100 to 300°C. [5] The fire-resistant resin composition according to any one of [1] to [4] above, wherein the (B) thermally expandable layered inorganic substance is expandable graphite. [6] The fire-resistant resin composition according to any one of [1] to [5] above, further containing an elastomer as the resin component. [7] A refractory made of the fire-resistant resin composition according to any one of [1] to [6] above. [8] The refractory according to [7] above, which is in sheet form. [9] The refractory according to [8] above, having a thickness of 1.0 mm or more.

[10] A fire-resistant laminate comprising the refractory according to any one of [7] to [9] above and a base material integrated with the refractory.

[11] A sectional penetration treatment material containing the refractory material according to any one of [7] to [9] above or the refractory laminate according to

[10] above.

[12] A sectional penetration treatment structure containing the sectional penetration treatment material according to

[11] above.

[13] A construction method for the sectional penetration treatment structure according to

[12] above.

Effect of the Invention

[0010] According to the present invention, when a fire occurs, it is possible to provide a fire-resistant resin composition that can block the sectional penetration part, suppress the spread of fire, and even when the thermal expansion material is highly filled, the residue is hard and the blockage of the sectional penetration part can be maintained.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Mode for Carrying Out the Invention

[0012] Hereinafter, the present invention will be described in detail. The fire-resistant resin composition of the present invention contains (A) a resin component containing chloroprene rubber, (B) a thermally expandable layered inorganic substance, and (C) a fire-resistant additive containing at least one selected from a flame retardant, an endothermic agent, and an inorganic filler.

[0013] (A) Resin component containing chloroprene rubber Component (A) of the present invention is a resin component containing chloroprene rubber. As the chloroprene rubber (CR), sulfur-modified (G type) by thiuram-based or non-sulfur-modified (W type) by mercaptan-based can be used. The Mooney viscosity ML(1+4) of the chloroprene rubber at 100 °C is preferably 20 to 160, more preferably 30 to 150, and even more preferably 40 to 140. When the Mooney viscosity of the chloroprene rubber at 100 °C is equal to or higher than the lower limit value, the cohesive force increases due to the increase in molecular weight, so that the hardness of the residue is maintained even when a high filling amount of the thermally expandable layered inorganic substance is used. On the other hand, when it is equal to or lower than the upper limit value, the load applied to the kneading device during kneading is reduced, so the moldability is improved. The Mooney viscosity ML(1+4) is measured at 100 °C in accordance with JIS K6300. The content of the chloroprene rubber in the (A) resin component is preferably in the range of 30 to 100% by mass, more preferably in the range of 50 to 100% by mass, and even more preferably 80 to 100% by mass.

[0014] In addition to the chloroprene rubber, the (A) resin component may contain, for example, a thermoplastic resin, a thermosetting resin, or an elastomer, as long as the effects of the present invention are not inhibited. Examples of thermoplastic resins include polyvinyl chloride (PVC), chlorinated polyvinyl chloride resin (CPVC), fluororesin, polyphenylene ether, modified polyphenylene ether, polyphenylene sulfide, polycarbonate, polyetherimide, polyetheretherketone, polyarylate, polyamide, polyamideimide, polybutadiene, polyimide, acrylic resin, polyacetal, polyamide, polyethylene (PE) and polypropylene (PP), polyolefins such as ethylene vinyl acetate (EVA), ethylene-propylene-diene copolymer (EPDM), chloroprene (CR), polyesters such as polyethylene terephthalate and polybutylene terephthalate, polycarbonate, polystyrene (PS), polyphenylene sulfide, acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile-styrene-acrylonitrile copolymer (ASA), acrylonitrile / ethylene-propylene-diene / styrene copolymer (AES), and the like. Examples of thermosetting resins include epoxy resins, phenolic resins, melamine resins, urea resins, unsaturated polyester resins, alkyd resins, polyurethanes, thermosetting polyimides, and the like.

[0015] Examples of elastomers include natural rubber, silicone rubber, styrene-butadiene rubber, isoprene rubber, butadiene rubber, acrylonitrile-butadiene rubber, nitrile butadiene rubber, butyl rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber, urethane rubber, silicone rubber, and rubbers such as fluororubber. Also included are thermoplastic elastomers such as olefin-based thermoplastic elastomers (TPO), styrene-based thermoplastic elastomers (TPS), ester-based thermoplastic elastomers, amide-based thermoplastic elastomers, and vinyl chloride-based thermoplastic elastomers.

[0016] Among the above elastomers, when it is desired to impart adhesiveness to the fire-resistant resin composition of the present invention, it is preferable to blend a liquid elastomer such as polybutene. The liquid elastomer is an elastomer that becomes liquid at normal temperature and normal pressure. Further, in order to improve the compatibility between the liquid elastomer and chloroprene rubber, it is preferable to further blend butyl rubber. The content of the liquid elastomer in the component (A) is preferably in the range of 5 to 50% by mass, more preferably in the range of 10 to 40% by mass, and particularly preferably in the range of 20 to 30% by mass. When it is equal to or higher than the above lower limit value, sufficient adhesiveness can be imparted to the resin component. When it is equal to or lower than the above upper limit value, the content of other rubber components such as chloroprene rubber can be ensured, and sufficient hardness of the residue can be obtained even when a large amount of the thermal expansion material is filled. Also, from the viewpoint of ensuring the compatibility between butyl rubber and the liquid elastomer, the blending amount of butyl rubber is preferably in the range of 1:10 to 10:1 (mass ratio) of butyl rubber / liquid elastomer, and more preferably in the range of 4:6 to 6:4. These thermoplastic resins, thermosetting resins, and elastomers may be used alone or in combination of two or more.

[0017] (B) Thermally expandable layered inorganic substance The thermally expandable layered inorganic substance is a conventionally known substance that expands upon heating. Examples thereof include vermiculite and thermally expandable graphite, and thermally expandable graphite is particularly preferable. As the thermally expandable layered inorganic substance, particulate or flaky ones may be used. Since the thermally expandable layered inorganic substance expands upon heating to form a large amount of voids, the refractory using the thermally expandable layered inorganic substance of the present invention suppresses the spread of fire and is extinguished when ignited. Thermally expandable graphite is obtained by treating powders such as natural flaky graphite, pyrolytic graphite, and kish graphite 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 to form a graphite intercalation compound. The produced thermally expandable graphite is a crystalline compound that maintains the layered structure of carbon. The expandable graphite used in the present invention may also be one in which the expandable graphite obtained by acid treatment is neutralized with ammonia, aliphatic lower amines, alkali metal compounds, alkaline earth metal compounds, or the like. Examples of the aliphatic lower amines include monomethylamine, dimethylamine, trimethylamine, ethylamine, propylamine, butylamine, and the like. Examples of the alkali metal compounds and alkaline earth metal compounds include hydroxides, oxides, carbonates, sulfates, organic acid salts, etc. of potassium, sodium, calcium, barium, magnesium, and the like.

[0018] The particle size of the expandable graphite is preferably 20 to 200 mesh. When the particle size of the expandable graphite is within the above range, it is easy to expand and create a large volume of voids, so the fire resistance is improved. Also, the dispersibility in the resin is improved. The average aspect ratio of the expandable graphite is preferably 2 or more, more preferably 5 or more, and still more preferably 10 or more. The upper limit of the average aspect ratio of the expandable graphite is not particularly limited, but from the viewpoint of preventing cracking of the expandable graphite, it is preferably 1,000 or less. Since the average aspect ratio of the expandable graphite is 2 or more, it is easy to expand and create a large volume of voids, so the flame retardancy is improved. The average aspect ratio of the expandable graphite is the average value of the values obtained by measuring the maximum dimension (major axis) and the minimum dimension (minor axis) for each of 10 expandable graphites, and dividing the maximum dimension (major axis) by the minimum dimension (minor axis). The major axis and minor axis of the expandable graphite can be measured, for example, using a field emission scanning electron microscope (FE-SEM).

[0019] The thermal expansion start temperature of the expandable layered inorganic substance is not particularly limited, but for example, it is preferably 100 to 300 °C, more preferably 120 to 280 °C, and still more preferably 130 to 250 °C. By setting the lower limit value or higher, it is possible to prevent the expandable material from expanding erroneously due to heating other than a fire. Also, by setting the upper limit value or lower, it becomes easier to surely expand the expandable material by heating in a fire. Also, the expansion start temperature of the thermally expandable layered inorganic substance was measured by the following method. <Expansion start temperature> Put 0.02 g of graphite flakes into a test tube, supply the test tube to an electric furnace in a vertically standing state, and heat at each temperature for 10 minutes. Measure the thickness of the graphite flakes after heating, and calculate (the thickness of the graphite flakes after heating) / (the thickness of the graphite flakes before heating) as the expansion ratio. The temperature at which the expansion ratio becomes 3 times or more was defined as the expansion start temperature.

[0020] (B) The content of the thermally expandable layered inorganic substance is preferably 50 to 1000 parts by mass, more preferably 70 to 500 parts by mass, and even more preferably 100 to 300 parts by mass with respect to 100 parts by mass of the resin component (A). When it is at least the above lower limit value, sufficient thermal expansibility can be obtained and the partition penetration part can be sufficiently blocked. On the other hand, when it is at most the above upper limit value, the residue after combustion is hard and is not blown off by a flame or the like, and the blocking of the partition penetration part is maintained. Further, from the viewpoint of further increasing the expansion ratio of the refractory using the refractory resin composition of the present invention, the content of the thermally expandable layered inorganic substance is preferably 150 to 300 parts by mass. In the refractory resin composition of the present invention, even if the content of the thermally expandable layered inorganic substance is relatively increased to 150 parts by mass or more, the hardness of the residue can be maintained at a high value by using chloroprene rubber as the resin component.

[0021] Also, (B) the content of the thermally expandable layered inorganic substance is preferably 15 to 75 parts by mass, more preferably 20 to 65 parts by mass, and even more preferably 23 to 60 parts by mass with respect to 100 parts by mass of the refractory resin composition. When it is at least the above lower limit value, sufficient thermal expansibility can be obtained and the partition penetration part can be sufficiently blocked. On the other hand, when it is at most the above upper limit value, the moldability becomes good, and the surface property, mechanical physical properties, flexibility, etc. of the seal member also become good. Further, by selecting the content of the thermally expandable graphite within the above range, it becomes easy to adjust the expansion ratio within a desired range. From the viewpoint of further increasing the expansion ratio of the refractory using the refractory resin composition of the present invention, the content of the thermally expandable layered inorganic substance is preferably 30 to 60 parts by mass. Further, even if the content of the thermally expandable layered inorganic substance is relatively increased, in the present invention, by using chloroprene rubber as the resin component, the residue hardness can be maintained at a high value.

[0022] The refractory resin composition of the present invention contains, as (C) a refractory additive, at least one selected from a flame retardant, a heat absorbent, and an inorganic filler. That is, each component may be used alone or in combination of two or more. By containing (C) a refractory additive, the refractory resin composition can improve the flame retardancy of the refractory resin composition while increasing the residue hardness.

[0023] <Flame retardant> Examples of the flame retardant used in the present invention include phosphorus atom-containing compounds. Examples of the phosphorus atom-containing compounds include red phosphorus, various phosphate esters such as triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, and xylenyl diphenyl phosphate, metal phosphates such as sodium phosphate, potassium phosphate, and magnesium phosphate, metal phosphites such as sodium phosphite, potassium phosphite, magnesium phosphite, and aluminum phosphite, and ammonium polyphosphate. By using these phosphorus-containing compounds, appropriate fire resistance and fire extinguishing performance can be imparted to the refractory resin composition. The flame retardant may be used alone or in combination of two or more. Among these flame retardants, ammonium polyphosphate, aluminum phosphite, etc. are particularly preferable from the viewpoint of improving the fire resistance and fire extinguishing performance of the refractory resin composition.

[0024] The flame retardant preferably becomes solid at normal temperature (23°C) and normal pressure (1 atm). The average particle diameter of the flame retardant is preferably 1 to 200 μm, more preferably 1 to 60 μm, even more preferably 3 to 40 μm, and still more preferably 5 to 20 μm. When the average particle diameter of the flame retardant is within the above range, the dispersibility of the flame retardant in the fire-resistant resin composition is improved, and the flame retardant can be uniformly dispersed in the resin or the blending amount of the flame retardant with respect to the resin can be increased.

[0025] <Endothermic agent> As the endothermic agent used in the fire-resistant resin composition of the present invention, hydrated metal compounds are preferably cited. A hydrated metal compound is a compound that decomposes upon contact with a flame to generate water vapor and has an endothermic effect. Examples of the hydrated metal compound include metal hydroxides and hydrates of metal salts. Specifically, aluminum hydroxide, magnesium hydroxide, calcium hydroxide, calcium-magnesium-based hydroxide, hydrotalcite, boehmite, talc, dawsonite, hydrate of calcium sulfate, hydrate of magnesium sulfate, zinc borate [2ZnO·3B2O5·3.5H2O], etc. are cited. Among these, from the viewpoints of fire resistance, fire extinguishing performance, etc., at least one selected from aluminum hydroxide, magnesium hydroxide, calcium sulfate dihydrate, and magnesium sulfate heptahydrate is preferable, and aluminum hydroxide and magnesium hydroxide are particularly preferable.

[0026] As the endothermic agent, those having a thermal decomposition start temperature of 500°C or lower and an endothermic amount of 500 J / g or more are preferable. When either the thermal decomposition start temperature or the endothermic amount is within the above range, it can be quickly extinguished during ignition. From the above viewpoints, the thermal decomposition start temperature of the endothermic agent is preferably 400°C or lower, and more preferably 300°C or lower. Also, the thermal decomposition start temperature of the endothermic agent is usually 100°C or higher, preferably 150°C or higher, and more preferably 180°C or higher. By setting these lower limit values or higher, it is possible to prevent the endothermic agent from malfunctioning due to heating other than a fire. Note that the thermal decomposition start temperature can be measured by a thermogravimetry differential thermal analyzer (TG-DTA), specifically, it can be measured by the method described in the examples.

[0027] The endothermic quantity of the endothermic agent is preferably 600 J / g or more, more preferably 900 J / g or more. When the endothermic quantity of the endothermic agent is within the above range, the heat absorption property is improved, so the fire resistance and fire extinguishing performance are better. The endothermic quantity of the endothermic agent is usually 4000 J / g or less, preferably 3000 J / g or less. Note that the endothermic quantity can be measured using a thermogravimetry differential thermal analyzer (TG-DTA), specifically, it can be measured by the method described in the examples.

[0028] Also, the endothermic agent preferably has an average particle diameter of 0.1 to 90 μm. By setting the average particle diameter within the above range, the endothermic agent is easily dispersed in the resin, it is easy to blend a large amount of the endothermic agent, and the fire resistance and fire extinguishing performance are also easily improved. From the above viewpoints, the average particle diameter of the endothermic agent is more preferably 0.5 to 60 μm, further preferably 0.8 to 40 μm, and even more preferably 0.8 to 10 μm.

[0029] <Inorganic filler> As the inorganic filler that can be used in the fire-resistant resin composition of the present invention, there is no particular limitation as long as it is an inorganic filler generally used in a thermally expandable resin composition. Specifically, for example, 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, dawsonite, hydrotalcite, calcium sulfate, barium sulfate, gypsum fiber, calcium silicate, talc, clay, mica, montmorillonite, bentonite, activated clay, sepiolite, imogolite, sericite, glass fiber, glass beads, silica balloon, aluminum nitride, aluminum phosphite, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balloon, charcoal powder, various metal powders, potassium titanate, magnesium sulfate, lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag fiber, fly ash, dehydrated sludge, etc. can be mentioned. Among these, calcium carbonate and carbon black are preferable. These inorganic fillers may be used alone or in combination of two or more.

[0030] The average particle diameter of the inorganic filler is preferably 0.5 to 100 μm, more preferably 1 to 50 μm. When the content of the inorganic filler is small, those with a small particle diameter are preferable from the viewpoint of improving dispersibility. When the content is large, as the high filling progresses, the viscosity of the fire-resistant resin composition increases and the moldability decreases, so those with a large particle diameter are preferable. In addition, the average particle diameters of the above-mentioned flame retardant, heat absorber, and inorganic filler are the values of the median diameter (D50) measured by a laser diffraction / scattering particle size distribution measuring device.

[0031] As the content of the component (C) in the fire-resistant resin composition of the present invention, it is preferably 30 to 500 parts by mass, more preferably 50 to 400 parts by mass, and still more preferably 100 to 300 parts by mass with respect to 100 parts by mass of the resin. When the content of the component (C) is at least the above lower limit value, flame retardancy can be obtained and the mechanical properties can be improved. On the other hand, when it is at most the above upper limit value, the relative amount of the thermally expandable layered inorganic substance becomes sufficient, and when a fire occurs, it expands by the flame, closes the partition penetration part, and can suppress the spread of fire.

[0032] (C) The fire-resistant additive only needs to have at least one selected from a flame retardant, an endothermic agent, and an inorganic filler as described above. There is no particular limitation on the combination thereof, but a combination of a flame retardant and an inorganic filler is preferable, and a combination of a flame retardant, an endothermic agent, and an inorganic filler is also preferable. In particular, when ammonium polyphosphate (APP) is selected as the flame retardant and calcium carbonate is selected as the inorganic filler, the combination is preferable. It is considered to be due to the action of hardening the residue when ammonium polyphosphate and calcium carbonate react when heated by a fire or the like. Also, from the viewpoint of hardening the residue, it is also preferable to use aluminum phosphite as the (C) fire-resistant additive.

[0033] The fire-resistant resin composition of the present invention may contain a plasticizer. The plasticizer is effective for the thermally expandable resin composition of the present invention using chloroprene rubber, and facilitates the production of the fire-resistant resin composition of the present invention. Specific examples of the plasticizer include, for example, phthalate plasticizers such as di-2-ethylhexyl phthalate (DOP), dibutyl phthalate (DBP), diheptyl phthalate (DHP), diisodecyl phthalate (DIDP), adipate plasticizers such as di-2-ethylhexyl adipate (DOA), diisobutyl adipate (DIBA), dibutyl adipate (DBA), etc., adipic acid dibutoxyethyl, adipic acid di(butoxyethoxyethyl), adipic acid di(methoxytetraethylene glycol), adipic acid di(methoxypentaethylene glycol), adipic acid (methoxytetraethylene glycol)(methoxypentaethylene glycol), etc. adipic acid ether ester plasticizers, fatty acid ester plasticizers such as adipic acid polyester, epoxidized ester plasticizers such as epoxidized soybean oil, trimellitic acid ester plasticizers such as tri-2-ethylhexyl trimellitate (TOTM), triisononyl trimellitate (TINTM), etc., phosphate plasticizers such as trimethyl phosphate (TMP), triethyl phosphate (TEP), etc., and process oils such as mineral oil. The plasticizer can be used singly or in combination of two or more. When the refractory resin composition contains a plasticizer, the content of the plasticizer in the refractory resin composition is in the range of, for example, 0.3 parts by mass or more and 150 parts by mass or less, preferably in the range of 10 parts by mass or more and 100 parts by mass or less, more preferably in the range of 20 parts by mass or more and 50 parts by mass or less, based on 100 parts by mass of the resin component. When the plasticizer is at or above these lower limits, the moldability tends to be good, and when it is at or below the upper limit, an appropriate strength is imparted to the molded article.

[0034] The total content of the resin component and the plasticizer is preferably 10% by mass or more and 50% by mass or less, more preferably 15% by mass or more and 45% by mass or less, still more preferably 20% by mass or more and 40% by mass or less, based on the total amount of the resin composition. By being at or above these lower limits, the moldability of the thermal expansion member can be improved. Also, flexibility is ensured, making bending and deformation easier. By being at or below the upper limit, it becomes possible to blend components such as thermally expandable graphite and inorganic fillers in a sufficient amount. In addition, the total content of the resin component and the plasticizer means the total content of both the resin component and the plasticizer when both are contained, and means the content of the resin component alone when the plasticizer is not contained.

[0035] The fire-resistant resin composition of the present invention may contain a known tackifier. By containing a tackifier, the production of the fire-resistant resin composition of the present invention becomes easy, and it also becomes easy to impart adhesiveness to the thermally expandable member. There is no particular limitation on the tackifier, and petroleum resins, alkylphenol-formaldehyde resins, alkylphenol-acetylene resins, coumarone-indene resins, xylene-formaldehyde resins, polybutene, etc. can be used, and preferably petroleum resins, etc. can be used. In addition, to the fire-resistant resin composition used in the present invention, within a range that does not impair its physical properties, if necessary, additives generally used in thermally expandable resin compositions such as heat stabilizers, lubricants, processing aids, antioxidants, antistatic agents, pigments, crosslinking agents, crosslinking accelerators, etc. may be added. Among these, it is preferable to use a processing aid.

[0036] <Method for producing a fire-resistant resin composition> The fire-resistant resin composition of the present invention can be produced, for example, as follows. First, a predetermined amount of (A) resin component, (B) thermally expandable layered inorganic substance, (C) fire-resistant additive, and other additives blended as necessary are mixed with a mixer such as a kneading roll to obtain a fire-resistant resin composition. The fire-resistant resin composition may be diluted by appropriately adding a solvent.

[0037] The fire-resistant resin composition of the present invention is used in the fire protection structure of a building, and is preferably used in the fire protection structure of a partition penetration portion for passing long insertion bodies such as cables and pipes, particularly in partition portions such as walls. That is, in the partition penetration portion, when a fire breaks out in any partition, it is preferably used as a fire-resistant material to prevent the spread of fire to other partitions.

[0038] [Fire-resistant material] The refractory of the present invention is composed of the refractory resin composition of the present invention, and is particularly preferably in the form of a sheet. The thickness of the sheet-shaped refractory is preferably 1.0 mm or more, more preferably 1.2 mm to 3.0 mm, and even more preferably 1.5 mm to 2.0 mm. When the thickness is equal to or greater than the lower limit value, sufficient refractory performance is ensured, and when it is equal to or less than the upper limit value, the flexibility of the refractory sheet is ensured.

[0039] The expansion ratio of the refractory of the present invention is preferably 10 times or more, more preferably in the range of 15 times to 70 times, even more preferably in the range of 20 times to 60 times, and even more preferably 38 to 60 times. Also, the residue hardness of the refractory of the present invention is preferably 0.20 kgf / cm 2 or more, more preferably in the range of 0.25 to 0.90 kgf / cm 2 and even more preferably in the range of 0.30 to 0.85 kgf / cm 2 The range is even more preferable. Note that the expansion ratio and residue hardness of the refractory can be measured by the method described in the examples.

[0040] The sheet-shaped refractory may be obtained by applying the above-mentioned optionally diluted thermally expandable resin composition to a support such as a base material or a release sheet, and appropriately drying, curing, etc., so that a refractory layer is formed on one surface of the support. Further, a refractory layer may be formed on one surface of the support by a known method such as extrusion molding. The refractory layer formed on the release sheet may be peeled off from the release sheet to form a sheet-shaped refractory composed of a single layer of the refractory layer. And after peeling off from the release sheet, it may be laminated on another layer to obtain a sheet-shaped refractory (refractory laminate) having a multilayer structure. Further, it may be laminated on another layer while being laminated on the release sheet or another support.

[0041] The sheet-shaped refractory of the present invention may be used as a single layer of the sheet-shaped refractory, or may be used as a multilayer body (refractory laminate) by laminating two or more layers of the sheet-shaped refractory or laminating other layers other than the sheet-shaped refractory. Examples of the other layers to be used include a base material and an adhesive layer. The refractory laminate may be one in which a refractory layer composed of a base material and the refractory resin composition of the present invention is integrated.

[0042] <Base material> The base material used for the refractory laminate in which the sheet-shaped refractory composed of the base material and the refractory resin composition of the present invention is integrated supports the refractory layer and evenly transmits heat to the refractory layer. Examples of the base material include metal foils such as aluminum foil and copper foil, metal foil composites such as composites of metal foils and glass cloths such as glass cloth and aluminum glass cloth, paper, cloth, resin films, and the like. Among these, from the viewpoint of fire resistance, it is preferably composed of a non-combustible material, and specifically, metal foils and metal foil composites are mentioned. Note that the non-combustible material is defined in the Building Standards Act and the Ordinance for Enforcement of the Building Standards Act. The thickness of each base material is not particularly limited, but is, for example, 0.01 to 1 mm, preferably 0.05 to 0.5 mm. By having a thickness below these upper limit values for the non-combustible material layer, flexibility is imparted to the sheet-shaped member. Also, by having a thickness above the lower limit value, it becomes easier to ensure fire resistance performance.

[0043] In addition, as described above, the sheet-shaped refractory of the present invention may be laminated with an adhesive layer, or may be a laminate of a plurality of sheet-shaped refractories. When laminating a plurality of sheet-shaped refractories, if they have adhesiveness, they may be laminated directly or via an adhesive layer. Further, when laminating a plurality of sheet-shaped refractories, it is preferable that they are layers having different expansion ratios from each other, and the expansion ratio may be controlled according to the usage form. When two or more layers of the sheet-shaped refractory are provided, at least one of them is preferably composed of the refractory resin composition of the present invention and constitutes the refractory layer of the layer having a high expansion ratio. In the case of a refractory laminate composed of a base material and a refractory layer, the base material may have two or more layers. Also, when the refractory agent layer has adhesiveness, it is preferably disposed on the outermost surface so as to be able to adhere to other members. The specific structure in the case of laminating a plurality of sheet-shaped refractories will be described later with reference to FIGS. 3 and 4.

[0044] The adhesive layer is preferably formed of an adhesive. As the adhesive, for example, an acrylic-based adhesive, a urethane-based adhesive, a rubber-based adhesive, a silicone resin-based adhesive, etc. can be used. The adhesive layer may be non-combustible, semi-non-combustible, or flame-retardant, and a flame retardant or the like may be blended into the adhesive used. The thickness of the adhesive layer is, for example, 5 to 400 μm, preferably 10 to 150 μm.

[0045] 〔Sheet-shaped member〕 As shown in FIG. 1, the refractory material (sheet-shaped member 3) of the present invention has a slit 32 for inserting the insertion body 21 therein, and at least one of the slits 32 extends to the outer edge of the sheet-shaped member 3. The slit 32 is formed by a cut. The sheet-shaped member 3 can insert the insertion body 21 into the sheet-shaped member 3 through the slit 32 extending to the outer edge. Note that the slit 32 may be in a form having a hole for inserting the insertion body 21 therein and a slit 32 extending from the hole to the outer edge of the sheet-shaped member 3.

[0046] As shown in FIG. 2, the sheet-shaped member 3 into which the insertion body 21 is inserted by the slit 32 is disposed on the outer surface 11A so as to cover the gap 13E between the opening 13C and the insertion body 21 from the outside of the partition portion 11, whereby the gap 13E between the opening 13C and the insertion body 21 is blocked by the sheet-shaped member 3. The sheet-shaped member 3 is preferably disposed so as to be in contact with both the outer surface 11A of the partition portion 11 and the outer periphery of the insertion body 21. By installing the sheet-shaped member 3 so as to be in contact with the insertion body 21 and the partition portion 11, the opening 13C of the partition portion 11 can be blocked, and the refractory performance can be improved and maintained.

[0047] The sheet-like member 3 may be composed of a single layer of the refractory material of the present invention (i.e., the refractory material), but is preferably a laminated structure having a base material and a refractory material layer. The laminated structure may have two layers, i.e., a base material and a refractory material layer, or may have at least three layers laminated alternately. Further, the sheet-like member 3 is not limited to a three-layer configuration, and the base material and the refractory material layer may be alternately laminated in four layers. Since the refractory material layer obtained from the refractory resin composition of the present invention has a high expansion ratio and a hard residue, it may constitute some of the plurality of refractory material layers or all of the layers.

[0048] When at least three layers of a base material and a refractory material layer having thermal expansibility are alternately laminated, when the sheet-like member 3 is heated, the refractory material layer can be appropriately supported by the base material and the heat can be evenly distributed, and the refractory material layer can expand substantially uniformly, improving the fire resistance. Further, since the refractory material layer of the sheet-like member 3 expands substantially uniformly, it can maintain the appropriate position where it was installed and does not shift, so that the fire resistance can be stably exhibited. Further, by using the sheet-like member 3, a fire-resistant structure is formed without arranging a filling material such as a fire-resistant putty or rock wool inside the partition penetration portion 15, so there is no variation caused by the operator. Furthermore, when a plurality of refractory material layers are laminated on the sheet-like member 3, the expanded refractory material layer on the partition portion 11 side is embedded inside the gap 13E, preventing the sheet-like member 3 from moving away from the partition portion 11 when it expands, and making the above-mentioned shift less likely to occur. On the other hand, the refractory material layer located at a position away from the partition portion 11 expands evenly as described above, and the spread of fire can be appropriately prevented by the expansion residue.

[0049] When there are a plurality of refractory material layers in the sheet-like member 3, it is preferable that the expansion ratio of the refractory material layer farthest from the outer surface 11A of the partition portion 11 is higher than the expansion ratio of the refractory material layer closest to the outer surface 11A of the partition portion 11. That is, in the sheet-like member 3 in FIGS. 3(b) and 3(c), it is preferable that the expansion ratio of the refractory material layer 31B is higher than the expansion ratio of the refractory material layer 31A. Since the refractory resin composition of the present invention has a high expansion ratio, it is suitable as the material of the refractory material layer 31B. Thus, when the expansion ratio of the refractory layer on the partition part 11 side is low, the strength of the expansion residue is maintained high, and the sheet-like member 3 is appropriately supported by the refractory layer embedded inside the gap 13E, making it even more difficult for displacement to occur. Further, the refractory layer at a position away from the partition part 11 expands sufficiently by heating and is more likely to exhibit higher refractory performance.

[0050] In addition, when there are three or more refractory layers, in order to expand the refractory layer away from the outer surface 11A of the partition part 11 more favorably and substantially uniformly, it is preferable to increase the expansion ratio of the refractory layer further away from the outer surface 11A of the partition part 11. Also, in the above multi-layer structure, each of the adjacent layers may be adhered by a known adhesive. Therefore, in each of the above laminated structures, an adhesive layer may be provided between each of the layers. Note that in the multi-layer structure, the sheet-like member 3 may have the same layer configuration throughout, or may have a partially different structure. For example, the layer configuration of the base material and the refractory layer may be partially changed.

[0051] [Partition Penetration Treatment Material] The refractory material (sheet-like member 3) of the present invention can be suitably used as a partition penetration treatment material. In this specification, as shown in FIG. 1, members (sheet-like member 3 and fixing members for fixing them, etc.) constructed in the partition penetration part 15 to form the partition penetration treatment structure 10 may be collectively referred to as the partition penetration treatment material.

[0052] [Partition Penetration Treatment Structure] As shown in FIG. 1, the partition penetration treatment structure of the present invention is a partition penetration treatment structure in which the partition penetration part 15 formed in the partition part 11 of a building and through which a long insertion body 21 is inserted inside has a refractory structure.

[0053] In the partition part 11 in the partition penetration processing structure of the present invention, the partition part 11 is a member that partitions between compartments (the first compartment A and the second compartment B) on the wall surface of a building, and has a partition penetration part 15 that penetrates from one outer surface 11A side of the partition part 11 to the other outer surface 11B side. The partition part 11 shown in FIG. 1 is a hollow wall and is composed of two wall materials (partition materials) 12A and 12B arranged with an interval (hollow part 13) therebetween. Therefore, the partition penetration part 15 is composed of a through hole 13A formed in one wall material 12A, a through hole 13B formed in the other wall material 12B, and the hollow part 13 therebetween. And the outer surface of one wall material 12A constitutes the outer surface 11A of the partition part 11, and the outer surface of the other wall material 12B constitutes the outer surface 11B of the partition part 11. The through holes 13A and 13B may have, for example, a circular shape, an elliptical shape, or a shape approximating these. Note that on each of the outer surfaces 11A and 11B, the through holes 13A and 13B constitute the openings 13C and 13D of the partition penetration part 15 provided in the partition part 11.

[0054] Hereinafter, the configuration of the partition penetration processing structure on one opening 13C side of the partition part 11 will be described. In the present embodiment, the configuration of the partition penetration processing structure on the other opening 13D side is the same, so the description thereof will be omitted.

[0055] The partition penetration processing structure 10 includes, as a partition penetration processing material, a sheet-like member 3 and a cover member 5. As described above, the sheet-like member 3 is a refractory material in which a base material and a refractory material layer are integrated.

[0056] As shown in FIG. 4(a), the sheet-like member 3 can be configured such that a refractory material layer 31A having adhesiveness is disposed on the outermost surface, and may be disposed in contact with the outer surface 11A of the partition part 11 by the refractory material layer having adhesiveness. In this case, in order to impart adhesiveness, it is preferable that the (A) component of the refractory resin composition constituting the refractory material layer 31A includes a liquid elastomer such as polybutene and further includes butyl rubber. Also, as shown in FIG. 4(b), when the refractory layer 31A provided with the adhesive layer 33 is arranged on the outermost surface, it may be arranged in contact with the outer surface 11A of the partition portion 11 by the adhesive layer. In this case, as the (A) component, the content of chloroprene rubber can be relatively increased, (B) the content of the thermally expandable layered inorganic substance can be increased, and the residue can be made harder. With the above configuration, the sheet-like member 3 can be fixed to the partition portion 11 without using a fixing member as a separate member from the sheet-like member 3. Further, by providing the refractory layer itself with adhesiveness, it is not necessary to provide an adhesive layer, so the configuration of the sheet-like member 3 can be further simplified. In addition, when the sheet-like member 3 is provided with a refractory layer having adhesiveness or an adhesive layer on its outermost surface, a release sheet may be attached to the outermost surface. The release sheet is preferably peeled off from the outermost surface during use. Also, the sheet-like member 3 may be fixed to the outer surface 11A of the partition portion 11 by a fixing member that is a separate member from the sheet-like member 3, such as a tacker or a screw. Of course, by a combination of two or more of these, the sheet-like member 3 may be fixed to the partition portion 11.

[0057] The thickness of the sheet-like member 3 is not particularly limited, but is, for example, 0.1 to 20 mm, preferably 0.5 to 10 mm.

[0058] 〔Cover member〕 The cover member 5 is provided to be connected to the sheet-like member 3 and is a member that covers the sheet-like member 3 provided in the partition portion 11. For example, as shown in FIG. 1, four cover members 5 are used to be connected to the four edges of the sheet-like member 3, and are four extending portions extending outward from the sheet-like member 3, and as shown in FIG. 2, cover the sheet-like member 3 provided in the partition portion 11. As means for providing the cover member 5 to be connected to at least a part of the sheet-like member 3, for example, known fixing means such as adhesives, adhesives and adhesive tapes, and fixing members such as tackers and screws can be mentioned. Here, the adhesive, the adhesive and the adhesive tape are preferably any of non-combustible materials, semi-non-combustible materials or flame-retardant materials, and it is preferable to blend a flame retardant or the like into the adhesive, the adhesive, etc. The cover member 5 is sheet-shaped and deformable, so that it can easily cover the sheet-like member 3.

[0059] As shown in FIG. 2, the portion of the cover member 5 that covers the opening 13C of the partition through portion 15 surrounds so as to contact the insertion body 21, and is fixed to the insertion body 21 by a string-like member 22 wound from the outside. The string-like member 22 may be any member that can be bent, and is preferably a wire member including a wire. The wire member may be a single metal wire, a resin-coated wire in which a metal wire such as a twist lock (registered trademark) is coated with resin, or a member in which a wire and a fiber are intertwined such as a mold. When using a wire member, the cover member 5 can be fixed to the insertion body 21 simply by twisting or screwing.

[0060] The cover member 5 may cover a part of the sheet-like member 3 and make a part of the sheet-like member 3 invisible from the outside. Specifically, it is preferable to cover the portion through which the insertion body 21 of the sheet-like member 3 is inserted, whereby the design property of the partition through portion 15 can be improved, and the fire resistance of the partition through portion 15 can be improved. On the other hand, the cover member 5 may cover a part of the sheet-like member 3 so as to be visible from the outside. Specifically, as shown in FIG. 2, the cover member 5 may make the end face 3C of the sheet-like member 3 visible from the outside. By making the end face 3C of the sheet-like member 3 visible from the outside in the state where the cover member 5 is installed, a visual inspection of whether the sheet-like member 3 is installed in the partition penetration portion 15 can be easily performed.

[0061] The cover member 5 is preferably installed so as to be in contact with the sheet-like member 3 and the inserted body 21. By installing the cover member 5 so as to be in contact with the sheet-like member 3 and the inserted body 21, the opening 13C of the partition portion 11 can be closed by the sheet-like member 3 and the cover member 5, and the fire resistance can be improved.

[0062] The cover member 5 is installed so as to form a gap 40 between the cover member 5 and the sheet-like member 3. Since there is a gap 40 between the sheet-like member 3 and the cover member 5, the cover member 5 is fixed with a margin for the axial movement of the inserted body 21. By fixing the cover member 5 to the inserted body 21 with a margin, even when the inserted body 21 arranged inside the sheet-like member 3 and the cover member 5 is axially moved after the installation of the sheet-like member 3 and the cover member 5, the margin of the cover member 5 buffers the fact that the sheet-like member 3 and the cover member 5 move together with the inserted body 21. By buffering the fact that the sheet-like member 3 and the cover member 5 move together with the inserted body 21, it is possible to suppress the sheet-like member 3 and the cover member 5 from deviating from the partition penetration portion 15. That is, with such a configuration, the sheet-like member 3 and the cover member 5 can be continuously maintained and arranged at appropriate positions in the partition penetration portion 15, and the fire resistance of the partition penetration portion 15 can be maintained. There can be various forms of the configuration in which there is a gap 40 between the sheet-like member 3 and the cover member 5, and the cover member 5 is fixed with a margin with respect to the axial movement of the inserted body 21. For example, a configuration using a material having flexibility and stretchability such that at least a part of the cover member 5 can be bent or curved, and a configuration in which at least a part of the cover member 5 is fixed so as to have slack with respect to the inserted body 21 can be mentioned.

[0063] The cover member 5 may be composed of a single layer of a fire-resistant material, may be composed of a single layer of a non-combustible material, or may have both a refractory layer and a non-combustible material layer. However, it is preferable to have a non-combustible material layer, and it is more preferable to be composed of a non-combustible material layer. Further, it may have a layer other than the refractory layer and the non-combustible material layer, and examples of such a layer include a material layer composed of a material other than a non-combustible material, an adhesive layer, and the like. Examples of the cover member 5 preferably include a metal foil such as an aluminum foil, a glass cloth, and a metal foil composite such as a composite of a metal foil and a glass cloth like an aluminized glass cloth. These constitute a non-combustible material layer. Among these, aluminized glass cloth is more preferable from the viewpoint of fire resistance. The thickness of the non-combustible material layer is not particularly limited, but is, for example, 0.01 to 1 mm, preferably 0.05 to 0.5 mm. By having a thickness equal to or less than these upper limit values, flexibility is imparted to the cover member 5. Therefore, the cover member 5 can be wound around the outer periphery of the inserted body 21 while being in close contact therewith, even if it has a non-combustible material layer, for example. Also, by having a thickness equal to or greater than the lower limit value, it becomes easier to ensure fire resistance performance.

[0064] As described above, the cover member 5 is preferably a sheet that can be deformed so as to cover the sheet-like member 3, but it is preferable that the cover member 5 has a thickness smaller than that of the sheet-like member 3 so that flexibility is imparted and deformation is easy. The thickness of the cover member 5 is not particularly limited, but is, for example, 0.01 to 1 mm, preferably 0.05 to 0.5 mm.

[0065] The refractory layer used for the cover member 5 is preferably a thermally expandable member that expands upon heating. The thermally expandable member prevents the spread of fire by expanding during a fire. The thermally expandable member is preferably formed of a thermally expandable resin composition as described later. Also, the refractory layer may have adhesiveness. Note that the thickness of the refractory layer is not particularly limited, but for example, it is 0.01 to 1 mm, preferably 0.05 to 0.5 mm. By having a thickness below these upper limit values, flexibility is imparted to the cover member 5. Therefore, even if the cover member 5 has a refractory layer, it can be wound around the outer periphery of the inserted body 21. Also, by having a thickness above the lower limit value, it becomes easier to ensure fire resistance performance.

[0066] The cover member 5 may have a refractory layer with adhesiveness or an adhesive layer. The refractory layer with adhesiveness and the adhesive layer may form the outermost surface of the cover member 5. With the above configuration, the cover member 5 can be fixed to the sheet-like member 3 or the inserted body 21 without using a fixing member as a separate member from the cover member 5. Also, by giving the refractory layer itself adhesiveness, it is not necessary to provide an adhesive layer, so the configuration of the cover member 5 can be made simpler. Note that when the cover member 5 is provided with a refractory layer with adhesiveness or an adhesive layer on its outermost surface, a release sheet may be attached to its outermost surface. The release sheet is preferably peeled off from the outermost surface during use.

[0067] The construction method of the partition penetration treatment structure 10 of the present invention includes a step of installing the sheet-like member 3 described above so as to close at least a part of the gap 13E between the opening 13C of the partition penetration portion 15 provided in the partition portion 11 and the inserted body 21. Then, it can be constructed by covering the sheet-like member 3 with the cover member 5 installed on the sheet-like member 3 and fixing a part of the cover member 5 to the inserted body 21. Therefore, the construction is easy.

[0068] The sheet-like member 3 and the cover member 5 used in the construction may be separate. In the case where they are separate, after installing the sheet-like member 3 on the partition portion 11, the cover member 5 is adhered to the sheet-like member 3 and installed, and the installed cover member 5 covers the sheet-like member 3 to enable construction. Also, the sheet-like member 3 and the cover member 5 used in the construction may be an integral body in which the sheet-like member 3 and the cover member 5 are adhered in advance.

[0069] According to the configuration of the present embodiment described above, the gap 13E inside the opening 13C of the partition penetration portion 15 is blocked by the sheet-like member 3 and the cover member 5, and at least the sheet-like member 3 among these has a refractory material. Therefore, appropriate fire resistance can be imparted to the partition penetration portion treatment structure 10. Also, in the present embodiment, since the refractory structure is formed by the sheet-like member 3 and the cover member 5 without arranging filling materials such as refractory putty and rock wool inside the partition penetration portion 15, there is no variation caused by workers.

[0070] Furthermore, in the present embodiment, at least a part of at least the sheet-like member 3 and the cover member 5 is exposed and visible from the outside. Also, when a fixing member for fixing the sheet-like member 3 or the cover member 5 is provided, the fixing member may be arranged at a position visible from the outside. And inside the partition penetration portion 15, no member other than the inserted body 21 is provided. Therefore, it can be easily checked by visual inspection or photographing that the partition penetration treatment material has been constructed as specified. Also, it is less likely to occur such as forgetting the construction.

[0071] The adhesive layer is preferably formed of an adhesive. As the adhesive, for example, an acrylic-based adhesive, a urethane-based adhesive, a rubber-based adhesive, a silicone resin-based adhesive, etc. can be used. The adhesive layer may be non-combustible, semi-non-combustible, or flame-retardant, and a flame retardant or the like may be blended with the adhesive used. The thickness of the adhesive layer is, for example, 5 to 400 μm, preferably 10 to 150 μm. By configuring the cover member 5 to have an adhesive layer on one surface 5A, the cover member 5 can be fixed to the insertion body 21 without using a fixing member as a separate member from the cover member 5. In addition, when the cover member 5 is provided with an adhesive layer on one surface 5A, a release sheet may be attached to the one surface 5A. The release sheet may be peeled off from the one surface 5A during use.

[0072] The cover member 5 is composed of an elastic foam having flexibility capable of following the outer periphery of the insertion body 21. Specifically, examples of the elastic foam include an olefin-based resin foam and a urethane-based resin foam. The thickness of the elastic foam is not particularly limited, but is, for example, 0.1 to 10 mm, preferably 0.15 to 5 mm. By having a thickness below these upper limit values, flexibility is imparted to the cover member 5. Therefore, the cover member 5 can be wound around while being in close contact with the outer periphery of the insertion body 21. Also, by having a thickness above the lower limit value, the arrangement of the cover member 5 becomes easy.

[0073] According to the configuration of the present embodiment described above, the gap 13E inside the opening 13C of the partition penetration portion 15 is blocked by the sheet-like member 3 and the cover member 5, and at least the sheet-like member 3 among these has a refractory material. Therefore, appropriate fire resistance can be imparted to the partition penetration portion treatment structure 10. Also, as described above, the partition penetration treatment structure 10 prepares the sheet-like member 3 and the cover member 5, and first, installs the sheet-like member 3 so as to block the gap 13E between the opening 13C of the partition penetration portion 15 and the insertion body 21. Next, the cover member 5 is wound around the insertion body 21 for one week or more, and the sheet-like member 3 is fixed so as to cover at least a part thereof by the cover member 5, thereby enabling construction. Therefore, the construction is easy. Also, in the present embodiment, since a refractory structure is formed by the sheet-like member 3 and the cover member 5 without arranging a filler such as refractory putty or rock wool inside the partition penetration portion 15, there is no variation caused by the operator.

[0074] In the above description, the partition portion 11 is a hollow wall with a hollow portion 13 inside, but it is not limited to a hollow wall and may be a wall without a hollow provided, for example, it may be composed of a single wall material. Further, the partition portion 11 is not limited to the wall of a building and may be the ceiling or floor of a building. Even in the case of the ceiling or floor, the partition portion may have a structure with a hollow portion between two partition materials, or may have a structure without a hollow portion, and may be composed of, for example, a single partition material.

[0075] The cover member 5 is not limited to the above aspect. For example, in the partition penetration processing structure 10 shown in FIG. 1, the cover member 5 is shown as having four extending portions extending outward from the sheet-like member 3, but it may be a single sheet-like member that is slightly larger than the sheet-like member 3. Further, in the partition penetration processing structure 10 shown in FIG. 2, an aspect in which the cover member 5 is adhered only to a part of the surface 3A of the sheet-like member 3 is shown, but when using a single sheet-like cover member 5 that is slightly larger than the sheet-like member 3, the cover member 5 can be adhered to the entire surface 3A of the sheet-like member 3. That is, a structure in which the sheet-like member 3 is laminated on one surface of the cover member 5 may be provided. In such a structure, it is preferable that the cover member 5 has a non-combustible material layer. By making the sheet-like member 3 and the cover member 5 a combination of a non-combustible material layer and a refractory material layer, the fire resistance can be improved. Further, an adhesive layer may be provided on the surface of the cover member 5 to which the sheet-like member 3 is adhered, and the adhesive layer enables easy adhesion to the sheet-like member 3. Further, the sheet-like member 3 may have a structure in which a base material, which is one layer of the sheet-like member 3, extends outward from other layers. According to such a structure, the extending portion of the base material can be used as the cover member 5 as it is. Further, in the partition penetration processing structure 10 shown in FIGS. 1 and 2, an aspect in which the sheet-like member 3 and the cover member 5 are each provided is shown, but the cover member 5 may be omitted.

Example

[0076] Examples are given below to explain the present invention more specifically, but the present invention is not limited thereto. The components used in the examples and comparative examples are shown below.

[0077] (A) Resin component (A-1) Chloroprene rubber (CR) · Skyprene (registered trademark) B-30 (manufactured by Tosoh Corporation, mercaptan-modified type, Mooney viscosity (100 °C) 45 - 53) · Skyprene (registered trademark) TSR-54 (manufactured by Tosoh Corporation, mercaptan-modified type, Mooney viscosity (100 °C) 60 - 80) · Skyprene (registered trademark) Y-30S (manufactured by Tosoh Corporation, mercaptan-modified type, Mooney viscosity (100 °C) 111 - 135) (A-2) Polybutene: manufactured by JXTG Energy Corporation, trade name "Nisseki Polybutene HV-100" (A-3) Butyl rubber: manufactured by JSR Corporation, trade name "JSR Butyl Rubber 065"

[0078] (B) Thermally expandable layered inorganic substance (B-1) EXP-50S 150 (manufactured by Fuji Carbon Industry Co., Ltd., expansion start temperature: 150 °C) (B-2) ADT-351 (manufactured by ADT Co., Ltd., expansion start temperature: 180 °C) (B-3) CA-60N (manufactured by Air Water Co., Ltd., expansion start temperature: 220 °C)

[0079] (C) Component (C-1) Flame retardant · APP: Ammonium polyphosphate (manufactured by Taihei Chemical Industry Co., Ltd.) · APA100: Aluminum phosphite (manufactured by Taihei Chemical Industry Co., Ltd.) (C-2) Heat absorbent · BF013: Aluminum hydroxide (manufactured by Nippon Light Metal Co., Ltd., average particle diameter 1 μm, thermal decomposition start temperature 200 °C, heat absorption amount 1000 J / g) · Kisuma 10: Magnesium hydroxide (manufactured by Kyowa Chemical Industry Co., Ltd., average particle diameter 0.9 μm, thermal decomposition start temperature 280 °C, heat absorption amount 1350 J / g) (C-3) Inorganic filler · Calcium carbonate: manufactured by Shiraishi Calcium Co., Ltd., product name "BF300" · Carbon black: manufactured by Mitsubishi Chemical Corporation, product name "Diamond Black H"

[0080] (D) Other components (D-1) Plasticizer · RS-107: Ether ester adipate (manufactured by ADEKA Corporation) · DIDP: Diisodecyl phthalate (manufactured by Tokyo Chemical Industry Co., Ltd., reagent special grade) (D-2) Tackifier: Imarb (petroleum resin, manufactured by Idemitsu Kosan Co., Ltd.)

[0081] The measurement methods and evaluation methods for each physical property are as follows. (1) Expansion ratio Test pieces (length 100 mm, width 100 mm, thickness being the thickness of the refractory materials in each example and comparative example) made from the refractory materials in each example and comparative example were supplied to an electric furnace and heated at 600 °C for 30 minutes. Then, the thickness of the test pieces was measured, and (thickness of the test piece after heating) / (thickness of the test piece before heating) was calculated as the expansion ratio. (2) Residue hardness After heating at 300 °C for 30 minutes in the above expansion ratio test, the test pieces after measuring the expansion ratio were supplied to a compression testing machine (manufactured by Katotec Co., Ltd., "Finger Filling Tester"), and compressed at a speed of 0.1 cm / second with a plunger of 0.25 cm 2 to measure the breaking point stress. (3) Shape retention of the residue The above residue hardness is an index of the hardness of the residue after expansion, but since the measurement is limited to the surface part of the residue, it may not be an index of the hardness of the entire residue. Therefore, the shape retention was measured as an index of the hardness of the entire residue. The shape retention of the residue was measured by visually observing the ease of collapse of the residue when lifting both ends of the test piece for which the expansion ratio was measured by hand. The case where the test piece could be lifted without collapsing was evaluated as qualified (PASS), and the case where the test piece collapsed and could not be lifted was evaluated as unqualified (FAIL). (4) Refractory test An opening with a diameter of 100 mm was made in the body of the gypsum board, and a 1200-mm-long electric cable was wired at the center of the opening so that the occupation ratio (= cable cross-sectional area / opening area) was 10%, and it was extended 300 mm on the heating side. The refractory material obtained by the above molding was installed so as to close the opening. It was heated in a vertical furnace for 1 hour along the heating curve of ISO834. When there was no penetration and no flame emergence, it was evaluated as pass (PASS), and when there was penetration and flame emergence, it was evaluated as fail (FAIL).

[0082] Examples 1 to 23, Comparative Examples 1 to 3 With the formulations shown in Table 1 below, a resin, a thermally expandable layered inorganic substance, a flame retardant, an endothermic agent, an inorganic filler, a plasticizer, and a petroleum resin were put into a roll and kneaded at 130 °C for 5 minutes to obtain a fire-resistant resin composition. The obtained fire-resistant resin composition was press-molded at 130 °C for 3 minutes to obtain a thermally expandable sheet with a thickness of 1.5 mm (1.3 mm for Example 23). The evaluation results are shown in Table 1.

[0083]

Table 1

[0084] As shown in each of the above examples, the fire-resistant sheet using the fire-resistant resin composition of the present invention had a sufficient expansion ratio and good shape retention of the residue. Also, in the fire resistance test, there was no penetration and no flame emergence. On the other hand, the fire-resistant sheet of Comparative Example 1 that did not contain a (C) fire-resistant additive had a high foaming ratio, but the residue hardness was not sufficient, and in the test of shape retention of the residue, the test piece collapsed and could not be lifted. Also, in the fire resistance test, there was penetration and flame emergence. Further, the fire-resistant sheet of Comparative Example 2 that did not have a (B) thermally expandable layered inorganic substance had penetration and flame emergence as a result of the fire resistance test. Furthermore, the fire-resistant sheet of Comparative Example 3 that did not contain chloroprene rubber as the (A) component had insufficient residue hardness, and in the test of shape retention of the residue, the test piece collapsed and could not be lifted. Also, in the fire resistance test, there was penetration and flame emergence.

Description of reference numerals

[0085] 3 Sheet-like members 5 Cover members 10 Compartment penetration processing structure 11 Partition part 12A, 12B Wall materials 13 Hollow part 13A, 13B Through holes 13C, 13D Openings 13E Gap 15 Compartment penetration part 21 Inserted body 22 String-like member 30A, ··· 30Y, 30Z Base materials 31A, ··· 31Y, 31Z Refractory material layers 32 Slits 33 Adhesive layer 40 Void

Claims

1. A fire-resistant resin composition for use in a fireproof structure of a building, containing: (A) a resin component containing chloroprene rubber, (B) a thermally expandable layered inorganic substance, and (C) a fire-resistant additive containing at least one selected from a flame retardant, a heat-absorbing agent, and an inorganic filler.

2. The fire-resistant resin composition according to Claim 1, wherein the content of the (B) thermally expandable layered inorganic substance is 50 to 1000 parts by mass with respect to 100 parts by mass of the (A) resin component.

3. The fire-resistant resin composition according to Claim 1 or 2, wherein the content of the (B) thermally expandable layered inorganic substance is 15 to 75 parts by mass with respect to 100 parts by mass of the fire-resistant resin composition.

4. The fire-resistant resin composition according to any one of Claims 1 to 3, wherein the thermal expansion start temperature of the (B) thermally expandable layered inorganic substance is 100 to 300°C.

5. The fire-resistant resin composition according to any one of Claims 1 to 4, wherein the (B) thermally expandable layered inorganic substance is expandable graphite.

6. The fire-resistant resin composition according to any one of Claims 1 to 5, further containing an elastomer as the resin component.

7. A refractory made of the fire-resistant resin composition according to any one of Claims 1 to 6.

8. The refractory according to Claim 7, which is in sheet form.

9. The refractory according to Claim 8, having a thickness of 1.0 mm or more.

10. A fireproof laminate comprising the refractory according to any one of Claims 7 to 9 and a base material integrated with the refractory.

11. A partition penetration treatment material containing the refractory according to any one of Claims 7 to 9 or the fireproof laminate according to Claim 10.

12. A partition penetration treatment structure containing the partition penetration treatment material according to Claim 11.

13. A construction method for the partition penetration treatment structure according to Claim 12.

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