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 allow long insertion bodies such as cables and pipes to pass through. When a fire breaks out in any compartment, the partition penetration part is required to have a fireproof 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 with a hollow part between the wall parts 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 also be arranged 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 amorphous fillers are used for fire protection treatment of compartment penetrations, variations in workmanship can occur, sometimes resulting in insufficient fire resistance. Furthermore, when fire-resistant materials and their accessories are installed within the building structure, the extent (quantity, thickness, length, etc.) of their installation may be unclear, or it may be difficult to determine if they are installed according to regulations. Therefore, to confirm whether fire-resistant materials are installed according to regulations, it is necessary to destroy the compartment penetration structure and inspect its internal structure.

[0006] Furthermore, in order to reduce variations among workers, there were kits that integrated components of predetermined quantities and sizes. However, these tended to have a large number of components, making it easy for components to be lost or forgotten during installation. Additionally, the packaging of each kit resulted in a large amount of waste.

[0007] Furthermore, in compartment penetration structures where long insertions such as cables and pipes are inserted, if the insertions are moved after the compartment penetration treatment structure has been applied, the fire-resistant materials installed inside may shift from their proper positions. External forces such as earthquakes can also cause the fire-resistant materials to shift from their proper positions. In addition, if the fire-resistant material does not expand uniformly but expands unevenly, it may shift from its proper position or fall off. As a result of the fire-resistant materials shifting from their proper positions, it becomes difficult for the fire-resistant structure of the compartment penetration to exhibit the desired fire resistance performance.

[0008] To address the above issues, a method can be considered in which a sheet made of a highly expandable material is installed at the compartment penetration, without using amorphous filler material within the structure. The sheet made of a highly expandable material can be obtained, for example, by filling it with a high amount of thermal expansion material. In the event of a fire, it will expand due to the flames, sealing the compartment penetration and suppressing the spread of fire. However, high levels of thermal expansion material tend to make the sheet residue brittle, which can be blown away by flames. Consequently, it was sometimes impossible to adequately seal the compartment penetrations, and the spread of fire could not be suppressed. Therefore, the object of the present invention is to provide a fire-resistant resin composition that, when a fire occurs, can be sealed off at the compartment penetration point by a high concentration of thermal expansion material, thereby suppressing the spread of fire, and that maintains the sealing of the compartment penetration point by keeping the residue hard even when the thermal expansion material is highly concentrated. [Means for solving the problem]

[0009] This invention was made to solve the above problems, and the gist of this invention is as follows. [1] A fire-resistant resin composition for use in fire-resistant structures of buildings, comprising (A) a resin component containing chloroprene rubber, (B) a thermally expandable layered inorganic material, and (C) a fire-resistant additive comprising at least one selected from flame retardants, heat absorbers, and inorganic fillers. [2] The fire-resistant resin composition according to [1] above, wherein the content of (B) the thermally expandable layered inorganic is 50 to 1000 parts by mass per 100 parts by mass of the resin component (A). [3] The fire-resistant resin composition according to [1] or [2] above, wherein the content of the (B) thermally expandable layered inorganic is 15 to 75 parts by mass per 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 onset temperature of the thermally expandable layered inorganic material (B) 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 material is thermally expandable graphite. [6] A fire-resistant resin composition according to any one of the above [1] to [5], further comprising an elastomer as a resin component. [7] A fire-resistant material comprising the fire-resistant resin composition described in any one of [1] to [6] above. [8] The fire-resistant material described in [7] above, which is in sheet form. [9] The fire-resistant material described in [8] above, having a thickness of 1.0 mm or more.

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

[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 and 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] It is a perspective view showing the sectional penetration treatment structure before the sectional penetration treatment material is installed. [Figure 2] It is a cross-sectional view showing the sectional penetration treatment structure. [Figure 3] It is a schematic cross-sectional view showing the configuration of the sheet-like member of the sectional penetration treatment structure. [Figure 4] It is a schematic cross-sectional view showing the configuration of the sheet-like member of the sectional penetration treatment structure. [Modes 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, a heat absorbent, 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) with a thiram system, non-sulfur-modified (W type) with a mercaptan system, etc., 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. If the Mooney viscosity of the chloroprene rubber at 100°C is above the lower limit, the cohesive force increases due to the larger molecular weight, so the hardness of the residue is maintained even when a high amount of thermally expandable layered inorganic material is filled. On the other hand, if it is below the upper limit, the load on the kneading equipment during kneading is reduced, so moldability is improved. The Mooney viscosity ML(1+4) is measured at 100°C in accordance with JIS K6300. (A) The chloroprene rubber content in the 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 in the range of 80 to 100% by mass.

[0014] (A) The resin component may contain, in addition to chloroprene rubber, other materials such as thermoplastic resins, thermosetting resins, and elastomers, to the extent that they do not impede the effects of the present invention. 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, polybutylene terephthalate, polycarbonate, polystyrene (PS), polyphenylene sulfide, acrylonitrile - butadiene - styrene copolymer (ABS), acrylonitrile - styrene - acrylonitrile copolymer (ASA), acrylonitrile / ethylene - propylene - diene / styrene copolymer (AES), etc. Examples of thermosetting resins include epoxy resins, phenolic resins, melamine resins, urea resins, unsaturated polyester resins, alkyd resins, polyurethanes, thermosetting polyimides, etc.

[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, thermoplastic elastomers such as olefin - based thermoplastic elastomer (TPO), styrene - based thermoplastic elastomer (TPS), ester - based thermoplastic elastomer, amide - based thermoplastic elastomer, and vinyl chloride - based thermoplastic elastomer are also included.

[0016] Of the elastomers mentioned above, if you wish to impart tackiness to the fire-resistant resin composition of the present invention, it is preferable to blend in a liquid elastomer such as polybutene. A liquid elastomer is an elastomer that becomes liquid at room temperature and atmospheric pressure. Furthermore, to improve the compatibility between the liquid elastomer and chloroprene rubber, it is preferable to further blend in butyl rubber. The liquid elastomer content in 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. If it is above the lower limit, sufficient tackiness can be imparted to the resin component, and if it is below the upper limit, the content of other rubber components such as chloroprene rubber can be ensured, and sufficient hardness of the residue can be obtained even with high filling of the thermal expansion material. Furthermore, from the viewpoint of ensuring compatibility between chloroprene rubber and liquid elastomer, the amount of butyl rubber blended is preferably in the range of 1:10 to 10:1, and more preferably in the range of 4:6 to 6:4. These thermoplastic resins, thermosetting resins, and elastomers may be used individually or in combination of two or more types.

[0017] (B) Thermally expandable layered inorganic material The thermally expandable layered inorganic material is a conventionally known substance that expands when heated, such as vermiculite and thermally expandable graphite, with thermally expandable graphite being preferred. The thermally expandable layered inorganic material may be in particulate or flaky form. Because the thermally expandable layered inorganic material expands when heated to form large voids, the fire-resistant material using the thermally expandable layered inorganic material of the present invention suppresses the spread of fire and extinguishes it when ignited. Thermally expandable graphite is produced by treating powders of natural flake graphite, pyrolysis graphite, quiche graphite, etc., with inorganic acids such as concentrated sulfuric acid, nitric acid, and selenic acid, and strong oxidizing agents such as concentrated nitric acid, perchloric acid, perchlorates, permanganates, dichromates, and hydrogen peroxide to generate graphite intercalation compounds. The resulting thermally expandable graphite is a crystalline compound that maintains the layered structure of carbon. The thermally expandable graphite used in this invention may also be obtained by neutralizing thermally expandable graphite obtained by acid treatment with ammonia, aliphatic lower amines, alkali metal compounds, alkaline earth metal compounds, etc. Examples of aliphatic lower amines include monomethylamine, dimethylamine, trimethylamine, ethylamine, propylamine, and butylamine. Examples of alkali metal compounds and alkaline earth metal compounds include hydroxides, oxides, carbonates, sulfates, and organic acid salts of potassium, sodium, calcium, barium, magnesium, and other metals.

[0018] The particle size of the thermally expandable graphite is preferably 20 to 200 mesh. When the particle size of the thermally expandable graphite is within this range, it expands easily, creating large voids, which improves fire resistance. It also improves dispersibility in resin. The average aspect ratio of thermally expandable graphite is preferably 2 or more, more preferably 5 or more, and even more preferably 10 or more. There is no particular upper limit to the average aspect ratio of thermally expandable graphite, but from the viewpoint of preventing cracking of the thermally expandable graphite, it is preferably 1,000 or less. An average aspect ratio of 2 or more of thermally expandable graphite makes it easier to expand and create large voids, thus improving flame retardancy. The average aspect ratio of thermally expandable graphite is calculated by measuring the maximum dimension (long axis) and minimum dimension (short axis) of 10 thermally expandable graphite samples, and then taking the average of the values ​​obtained by dividing the maximum dimension (long axis) by the minimum dimension (short axis). The long and short axes of thermally expandable graphite can be measured, for example, using a field emission scanning electron microscope (FE-SEM).

[0019] The thermal expansion initiation temperature of a thermally expandable layered inorganic material is not particularly limited, but is preferably 100 to 300°C, more preferably 120 to 280°C, and even more preferably 130 to 250°C. Setting the temperature above these lower limits prevents the thermally expandable material from expanding unintentionally due to heating other than fire. Conversely, setting the temperature below the upper limit makes it easier to reliably expand the thermally expandable material due to heating from a fire. Furthermore, the expansion initiation temperature of the thermally expandable layered inorganic material was measured using the following method. <Expansion initiation temperature> 0.02 g of graphite was placed in a test tube, and the test tube was supplied to an electric furnace with the tube held vertically. The test tube was heated at each temperature for 10 minutes. The thickness of the graphite after heating was measured, and the expansion ratio was calculated as (thickness of graphite after heating) / (thickness of graphite before heating). The temperature at which the expansion ratio was 3 times or more was defined as the expansion start temperature.

[0020] (B) The content of the thermally expandable layered inorganic material 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, per 100 parts by mass of the resin component (A). If it is above the lower limit, sufficient thermal expansion is obtained, and the compartment penetration can be sufficiently sealed. On the other hand, if it is below the upper limit, the residue after combustion is hard and will not be blown away by flames, etc., and the sealing of the compartment penetration is maintained. Furthermore, from the viewpoint of further increasing the expansion ratio of the refractory material using the refractory resin composition of the present invention, the content of the thermally expandable layered inorganic material 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 material is relatively high at 150 parts by mass or more, the residue hardness can be maintained at a high value by using chloroprene rubber as the resin component.

[0021] Furthermore, the content of (B) the thermally expandable layered inorganic material 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, per 100 parts by mass of the refractory resin composition. If it is above the lower limit, sufficient thermal expansion can be obtained, and the compartment penetration can be sufficiently sealed. On the other hand, if it is below the upper limit, the moldability will be good, and the surface properties, mechanical properties, and flexibility of the sealing member will also be good. In addition, by selecting the content of thermally expandable graphite within the above range, it becomes easier to adjust the expansion ratio to a desired range. Furthermore, from the viewpoint of further increasing the expansion ratio of the refractory material using the refractory resin composition of the present invention, the content of the thermally expandable layered inorganic material is preferably 30 to 60 parts by mass. In addition, even if the content of the thermally expandable layered inorganic material is relatively high, the present invention can maintain a high level of residue hardness by using chloroprene rubber as the resin component.

[0022] The fire-resistant resin composition of the present invention contains (C) a fire-resistant additive, which is at least one selected from flame retardants, heat absorbers, and inorganic fillers. That is, each component may be used individually or in combination of two or more. By containing the (C) fire-resistant additive, the fire-resistant resin composition of the present invention can improve the flame retardancy of the fire-resistant resin composition while increasing the hardness of the residue.

[0023] <Flame retardant> Examples of flame retardants used in the present invention include phosphorus-containing compounds. Examples of phosphorus-containing compounds include red phosphorus, various phosphate esters such as triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, and xylenyl diphenyl phosphate, metal phosphate salts such as sodium phosphate, potassium phosphate, and magnesium phosphate, metal phosphate salts 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 fire-resistant resin compositions. These flame retardants may be used individually or in combination of two or more. Among these flame retardants, ammonium polyphosphate and aluminum phosphite are particularly preferred from the viewpoint of improving the fire resistance and fire extinguishing performance of the fire-resistant resin composition.

[0024] The flame retardant is preferably solid at room temperature (23°C) and atmospheric pressure (1 atm). The average particle size of the flame retardant is preferably 1 to 200 μm, more preferably 1 to 60 μm, even more preferably 3 to 40 μm, and even more preferably 5 to 20 μm. When the average particle size of the flame retardant is within the above range, the dispersibility of the flame retardant in the fire-resistant resin composition is improved, allowing the flame retardant to be uniformly dispersed in the resin and enabling a higher amount of flame retardant to be blended with the resin.

[0025] <Heat absorbent> Hydrated metal compounds are preferred as heat absorbers used in the refractory resin composition of the present invention. Hydrated metal compounds are compounds that decompose upon contact with a flame, generating water vapor and thus absorbing heat. Examples of hydrated metal compounds include metal hydroxides and hydrates of metal salts. Specifically, examples include aluminum hydroxide, magnesium hydroxide, calcium hydroxide, calcium-magnesium hydroxides, hydrotalcite, boehmite, talc, dawsonite, calcium sulfate hydrate, magnesium sulfate hydrate, and zinc borate [2ZnO·3B2O5·3.5H2O]. Among these, at least one selected from aluminum hydroxide, magnesium hydroxide, calcium sulfate dihydrate, and magnesium sulfate heptahydrate is preferred from the viewpoint of fire resistance and fire extinguishing performance, with aluminum hydroxide and magnesium hydroxide being particularly preferred.

[0026] As a heat absorbent, it is preferable to have a thermal decomposition initiation temperature of 500°C or lower and a heat absorption amount of 500 J / g or more. If either the thermal decomposition initiation temperature or the heat absorption amount falls within the above range, the fire can be quickly extinguished in the event of ignition. From this viewpoint, the thermal decomposition initiation temperature of the heat absorbent is preferably 400°C or lower, and more preferably 300°C or lower. Furthermore, the thermal decomposition initiation temperature of the heat absorbent is usually 100°C or higher, preferably 150°C or higher, and even more preferably 180°C or higher. By setting these lower limits or higher, it is possible to prevent the heat absorbent from malfunctioning due to heating other than fire. The thermal decomposition initiation temperature can be measured using a thermogravimetric differential thermal analyzer (TG-DTA), and specifically, it can be measured by the method described in the examples.

[0027] The heat absorption capacity of the heat absorbent is preferably 600 J / g or more, more preferably 900 J / g or more. When the heat absorption capacity of the heat absorbent is within the above range, the heat absorption capacity is improved, resulting in better fire resistance and fire extinguishing performance. The heat absorption capacity of the heat absorbent is usually 4000 J / g or less, preferably 3000 J / g or less. The amount of heat absorbed can be measured using a thermogravimetric differential thermal analyzer (TG-DTA), and specifically, it can be measured by the method described in the examples.

[0028] Furthermore, the heat absorbent is preferably one with an average particle size of 0.1 to 90 μm. By keeping the average particle size within the above range, the heat absorbent is more easily dispersed in the resin, making it easier to incorporate a large amount of heat absorbent, and thus improving fire resistance and fire extinguishing performance. From the above viewpoint, the average particle size of the heat absorber is more preferably 0.5 to 60 μm, even more preferably 0.8 to 40 μm, and even more preferably 0.8 to 10 μm.

[0029] <Inorganic fillers> The inorganic filler that can be used in the fire-resistant resin composition of the present invention is not particularly limited, as long as it is an inorganic filler that is generally used in thermally expandable resin compositions. Specifically, examples 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, dawsonite, hydrotalcite, calcium sulfate, barium sulfate, gypsum fiber, calcium silicate, talc, clay, mica, montmorillonite, bentonite, activated clay, ceviolite, 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 zirconia titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag fiber, fly ash, dewatered sludge, etc. Of these, calcium carbonate and carbon black are preferred. These inorganic fillers may be used individually or in combination of two or more.

[0030] The average particle size of the inorganic filler is preferably 0.5 to 100 μm, and more preferably 1 to 50 μm. When the inorganic filler content is small, a smaller particle size is preferred from the viewpoint of improving dispersibility, and when the content is large, a larger particle size is preferred because as the filling progresses, the viscosity of the refractory resin composition increases and moldability decreases. The average particle size of the flame retardant, heat absorber, and inorganic filler mentioned above is the median diameter (D50) value measured using a laser diffraction / scattering particle size distribution analyzer.

[0031] The content of component (C) in the fire-resistant resin composition of the present invention is preferably 30 to 500 parts by mass, more preferably 50 to 400 parts by mass, and even more preferably 100 to 300 parts by mass, per 100 parts by mass of resin. When the content of component (C) is above the lower limit, flame retardancy can be obtained and mechanical properties can be improved. On the other hand, when it is below the upper limit, the relative amount of thermally expandable layered inorganic material becomes sufficient, and when a fire occurs, it expands due to the flame, blocks the penetration of compartments, and can suppress the spread of fire.

[0032] (C) The fire-resistant additive may have at least one selected from flame retardants, heat absorbers, and inorganic fillers, as described above. There are no particular restrictions on the combination, however, a combination of a flame retardant and an inorganic filler is preferred, as is a combination of a flame retardant, a heat absorber, and an inorganic filler. In particular, a combination in which ammonium polyphosphate (APP) is selected as the flame retardant and calcium carbonate is selected as the inorganic filler is preferred. This is thought to be because ammonium polyphosphate and calcium carbonate react when heated by fire or the like, which hardens the residue. Furthermore, 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 in the heat-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 plasticizers include phthalate ester plasticizers such as di-2-ethylhexyl phthalate (DOP), dibutyl phthalate (DBP), diheptyl phthalate (DHP), and diisodecyl phthalate (DIDP); adipate esters such as di-2-ethylhexyl adipate (DOA), diisobutyl adipate (DIBA), and dibutyl adipate (DBA); and adipate dibutoxyethyl, adipate di(butoxyethoxyethyl), adipate di(methoxytetraethylene glycol), and adipate di(methoxypentaethylene glycol). Examples include adipic acid ether ester plasticizers such as adipic acid (methoxytetraethylene glycol) (methoxypentaethylene glycol), fatty acid ester plasticizers such as adipic acid polyester, epoxidized ester plasticizers such as epoxidized soybean oil, trimellitic acid ester plasticizers such as tory 2-ethylhexyl trimellitate (TOTM) and triisononyl trimellitate (TINTM), phosphate ester plasticizers such as trimethyl phosphate (TMP) and triethyl phosphate (TEP), and process oils such as mineral oil. Plasticizers can be used individually or in combination of two or more types. When a fire-resistant resin composition contains a plasticizer, the amount of plasticizer in the fire-resistant resin composition is, for example, in the range of 0.3 parts by mass to 150 parts by mass per 100 parts by mass of the resin component, preferably in the range of 10 parts by mass to 100 parts by mass, and more preferably in the range of 20 parts by mass to 50 parts by mass. If the amount of plasticizer is above these lower limits, moldability tends to be good, and if it is below the upper limits, appropriate strength is imparted to the molded article.

[0034] The total content of resin components and plasticizers is preferably 10% to 50% by mass, more preferably 15% to 45% by mass, and even more preferably 20% to 40% by mass, based on the total amount of the resin composition. Setting the content above these lower limits improves the moldability of the thermally expandable member. It also ensures flexibility, making bending and deformation easier. Furthermore, setting the content below the upper limits allows for the incorporation of sufficient amounts of components such as thermally expandable graphite and inorganic fillers. Note that the total content of resin components and plasticizers refers to the combined content of both resin components and plasticizers if both are present, and to the content of resin components alone if no plasticizer is present.

[0035] The fire-resistant resin composition of the present invention may contain known tackifiers. Including a tackifier facilitates the production of the fire-resistant resin composition of the present invention and makes it easier to impart tackiness to thermally expandable members. The tackifier is not particularly limited and can be petroleum resin, alkylphenol-formaldehyde resin, alkylphenol-acetylene resin, coumarone-indene resin, xylene-formaldehyde resin, polybutene, etc., and preferably petroleum resin or the like can be used. Furthermore, the fire-resistant resin composition used in the present invention may contain, as necessary, additives commonly used in thermally expandable resin compositions, such as heat stabilizers, lubricants, processing aids, antioxidants, antistatic agents, pigments, crosslinking agents, and crosslinking accelerators, to the extent that they do not impair its physical properties. Among these, the use of processing aids is preferred.

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

[0037] The fire-resistant resin composition of the present invention is used in fire-resistant structures of buildings, and is particularly preferred for use in fire-resistant structures of compartment penetrations in partitions such as walls, where long insertions such as cables and pipes are passed through. In other words, it is preferable to use it as a fire-resistant material in compartment penetrations to prevent the spread of fire to other compartments when a fire occurs in one compartment.

[0038] [Fireproof material] The fire-resistant material of the present invention consists of the fire-resistant resin composition of the present invention, and is particularly preferably in the form of a sheet. The thickness of the sheet-like fire-resistant material 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. If the thickness is above the lower limit, sufficient fire resistance performance is ensured, and if it is below the upper limit, flexibility of the fire-resistant sheet is ensured.

[0039] The expansion ratio of the fire-resistant material of the present invention is preferably 10 times or more, more preferably in the range of 15 to 70 times, even more preferably in the range of 20 to 60 times, and still more preferably 38 to 60 times. Furthermore, the residue hardness of the refractory material of the present invention is 0.20 kgf / cm². 2 Preferably, it should be 0.25 to 0.90 kgf / cm². 2 It is more preferable that the range be 0.30 to 0.85 kgf / cm². 2 A range of is even more preferable. The expansion ratio and residue hardness of the refractory material can be measured by the method described in the examples.

[0040] The sheet-like fire-resistant material is preferably prepared by applying the heat-expandable resin composition, diluted as needed, to a support such as a substrate or release sheet, and then drying and curing it as appropriate to form a fire-resistant layer on one surface of the support. Alternatively, the fire-resistant layer may be formed on one surface of the support by known methods such as extrusion molding. The fire-resistant layer formed on the release sheet can be peeled off the release sheet to obtain a sheet-like fire-resistant material consisting of a single layer of fire-resistant material. Furthermore, a multilayer sheet-like fire-resistant material (fire-resistant laminate) can be obtained by laminating it onto another layer after peeling it off the release sheet. Alternatively, it may be laminated onto other layers while still laminated on the release sheet or another support.

[0041] The sheet-like fire-resistant material of the present invention may be used as a single layer, or it may be used as a multilayer (fire-resistant laminate) by laminating two or more layers of the sheet-like fire-resistant material, or by laminating other layers other than the sheet-like fire-resistant material. Examples of other layers that can be used include a base material and an adhesive layer. The fire-resistant laminate may be an integral structure in which a base material and a fire-resistant material layer made of the fire-resistant resin composition of the present invention are combined.

[0042] <Base material> The base material used in a fire-resistant laminate, which integrates a base material with a sheet-like fire-resistant material made of the fire-resistant resin composition of the present invention, supports the fire-resistant layer and evenly transfers heat to the fire-resistant layer. Examples of base materials include metal foils such as aluminum foil and copper foil, metal foil composites such as glass cloth and composites of metal foil and glass cloth such as aluminum glass cloth, paper, cloth, and resin film. Among these, from the viewpoint of fire resistance, it is preferable that the base material be made of a non-combustible material, and specifically, metal foils and metal foil composites are examples. Non-combustible materials are those defined in the Building Standards Act and the Enforcement Order 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. Having a non-combustible material layer with a thickness below these upper limits provides flexibility to the sheet-like member. Having a thickness above the lower limit makes it easier to ensure fire resistance.

[0043] Furthermore, as described above, the sheet-like fire-resistant material of the present invention may have an adhesive layer laminated over it, or it may be a laminate of multiple sheet-like fire-resistant materials. When laminating multiple sheet-like fire-resistant materials, if they are adhesive, they may be laminated directly or laminated with an adhesive layer in between. Furthermore, when multiple sheets of fire-resistant material are laminated, it is preferable that the layers have different expansion ratios, and the expansion ratios should be controlled according to the intended use. When two or more layers of sheet-like fire-resistant material are provided, it is preferable that at least one of them is composed of the fire-resistant resin composition of the present invention and constitutes a fire-resistant layer with a high expansion ratio. Furthermore, in a fire-resistant laminate composed of a base material and a fire-resistant layer, the base material may consist of two or more layers, and if the fire-resistant layer is adhesive, it is preferable to position it on the outermost surface so that it can adhere to other components. The specific structure for stacking multiple sheets of fire-resistant material is described later, with reference to Figures 3 and 4.

[0044] The adhesive layer is formed by an adhesive, and examples of adhesives that can be used include acrylic adhesives, urethane adhesives, rubber adhesives, and silicone resin adhesives. The adhesive layer may be non-flammable, semi-non-flammable, or flame-retardant, and flame retardants may be added to the adhesive used. The thickness of the adhesive layer is, for example, 5 to 400 μm, preferably 10 to 150 μm.

[0045] [Sheet-like material] As shown in Figure 1, the fire-resistant material (sheet-like member 3) of the present invention has a slit 32 through which an insertion body 21 is inserted, and at least one of the slits 32 extends to the outer edge of the sheet-like member 3. The slit 32 is formed by cutting. The sheet-like member 3 allows the insertion body 21 to be inserted into the interior of the sheet-like member 3 through the slit 32 that extends to the outer edge. The slit 32 may also have a hole through which the insertion body 21 is inserted, and a slit 32 that extends from the hole to the outer edge of the sheet-like member 3.

[0046] As shown in Figure 2, the sheet-like member 3 into which the insertion body 21 is inserted through the slit 32 is positioned on the outer surface 11A from the outside of the partition 11 so as to cover the gap 13E between the opening 13C and the insertion body 21, thereby closing the gap 13E between the opening 13C and the insertion body 21 with the sheet-like member 3. It is preferable that the sheet-like member 3 be positioned in contact with both the outer surface 11A of the partition 11 and the outer circumference of the insertion body 21. By positioning the sheet-like member 3 in contact with the insertion body 21 and the partition 11, the opening 13C of the partition 11 can be closed, thereby improving and maintaining fire resistance.

[0047] The sheet-like member 3 may consist of a single layer of the fire-resistant material of the present invention (i.e., the fire-resistant material), but is preferably a laminated structure having a base material and a fire-resistant material layer. The laminated structure may consist of two layers, a base material and a fire-resistant material layer, or at least three layers may be laminated alternately. Furthermore, the sheet-like member 3 is not limited to a three-layer configuration, and may consist of four layers of base material and fire-resistant material laminated alternately. The fire-resistant resin composition of the present invention has a high expansion ratio and the residue is hard, so it may constitute some of the multiple fire-resistant layers or all of them.

[0048] When the base material and the heat-expandable fire-resistant layer are alternately laminated in at least three layers, when the sheet-like member 3 is heated, the fire-resistant layer is properly supported by the base material, allowing heat to be distributed evenly, the fire-resistant layer expands almost uniformly, and good fire resistance can be achieved. Furthermore, because the fire-resistant layer of the sheet-like member 3 expands almost uniformly, it maintains its proper position and does not shift, thus providing stable fire resistance. In addition, by using the sheet-like member 3, a fire-resistant structure is formed without placing fillers such as fire-resistant putty or rock wool inside the compartment penetration 15, thus eliminating variations caused by workers. Furthermore, if multiple fire-resistant material layers are laminated on the sheet-like member 3, the fire-resistant material layer on the expanded partition portion 11 side is embedded inside the gap 13E, preventing the sheet-like member 3 from separating from the partition portion 11 when it expands, thus making the above-mentioned displacement less likely to occur. On the other hand, the fire-resistant material layers located away from the partition portion 11 expand evenly as described above, and the resulting expansion residue can effectively prevent the spread of fire.

[0049] When the sheet-like member 3 has multiple fire-resistant layers, it is preferable that the expansion ratio of the fire-resistant layer furthest from the outer surface 11A of the partition 11 is higher than that of the fire-resistant layer closest to the outer surface 11A of the partition 11. That is, in the sheet-like member 3 in Figures 3(b) and (c), it is preferable that the expansion ratio of the fire-resistant layer 31B is higher than that of the fire-resistant layer 31A. The fire-resistant resin composition of the present invention has a high expansion ratio and is therefore suitable as a material for the fire-resistant layer 31B. Thus, when the expansion ratio of the fire-resistant material layer on the partition portion 11 side is low, the strength of the expansion residue is maintained at a high level, the sheet-like member 3 is properly supported by the fire-resistant material layer embedded inside the gap 13E, and displacement becomes even less likely. In addition, the fire-resistant material layer at a position away from the partition portion 11 expands sufficiently when heated, making it easier to exhibit higher fire resistance performance.

[0050] Furthermore, if there are three or more fire-resistant layers, it is preferable to increase the expansion ratio of the fire-resistant layers further away from the outer surface 11A of the partition 11 in order to expand the fire-resistant layers further away from the outer surface 11A of the partition 11 more effectively and uniformly. Furthermore, in the above multilayer structure, each adjacent layer may be bonded together with a known adhesive, and therefore, in each of the above-mentioned laminated structures, an adhesive layer may be provided between each of the layers. In a multilayer structure, the sheet-like member 3 may have the same layer configuration throughout, or it may have a partially different structure. For example, the layer configuration of the base material and the fire-resistant layer may be partially modified.

[0051] [Partition penetration treatment material] The fire-resistant 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 Figure 1, the members (sheet-like member 3 and fixing members for fixing them, etc.) that are installed in the partition penetration 15 and form a partition penetration treatment structure 10 are collectively referred to as partition penetration treatment materials.

[0052] [Compartment penetration treatment structure] As shown in Figure 1, the partition penetration treatment structure of the present invention is a partition penetration treatment structure in which a partition penetration 15 formed in a partition 11 of a building and through which a long insertion body 21 is inserted is made of a fire-resistant material.

[0053] The partition section 11 in the partition penetration structure of the present invention is a member that separates partitions (a first partition A and a second partition B) in the wall surface of a building, and has a partition penetration section 15 that penetrates from one outer surface 11A to the other outer surface 11B of the partition section 11. The partition section 11 shown in Figure 1 is a hollow wall and is composed of two wall materials (partition materials) 12A and 12B arranged with a gap (hollow section 13) between them. Therefore, the partition penetration section 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 a hollow section 13 between them. The outer surface of one wall material 12A constitutes the outer surface 11A of the partition section 11, and the outer surface of the other wall material 12B constitutes the outer surface 11B of the partition section 11. The through holes 13A and 13B may have shapes such as circular, elliptical, or similar shapes. Furthermore, the through holes 13A and 13B on the outer surfaces 11A and 11B respectively constitute the openings 13C and 13D of the partition penetration portion 15 provided in the partition portion 11.

[0054] The following describes the configuration of the partition penetration processing structure on one side of the partition 11, opening 13C. However, in this embodiment, the configuration of the partition penetration processing structure on the other side of the opening 13D is the same, so its description will be omitted.

[0055] The partition penetration treatment structure 10 comprises a sheet-like member 3 and a cover member 5 as partition penetration treatment materials, and the sheet-like member 3 is a fire-resistant material in which the base material and the fire-resistant material layer are integrated, as described above.

[0056] As shown in Figure 4(a), the sheet-like member 3 can be configured with an adhesive fire-resistant layer 31A on its outermost surface, and may be positioned in contact with the outer surface 11A of the partition 11 by the adhesive fire-resistant layer. In this case, in order to provide adhesiveness, it is preferable that the (A) component of the fire-resistant resin composition constituting the fire-resistant layer 31A includes a liquid elastomer such as polybutene, and furthermore, butyl rubber. Furthermore, as shown in Figure 4(b), if the fire-resistant layer 31A, which includes an adhesive layer 33, is placed on the outermost surface, it may be placed in contact with the outer surface 11A of the partition portion 11 by the adhesive layer. In this case, the content of chloroprene rubber as component (A) can be relatively increased, and the content of thermally expandable layered inorganic material (B) can be increased, making the residue harder. With the above configuration, the sheet-like member 3 can be fixed to the partition 11 without using a fixing member as a separate component from the sheet-like member 3. Furthermore, by making the fire-resistant material layer itself adhesive, it is not necessary to provide an adhesive layer, thus further simplifying the structure of the sheet-like member 3. If the sheet-like member 3 has an adhesive fire-resistant material layer or adhesive layer on its outermost surface, a release sheet may be attached to that outermost surface. The release sheet should be peeled off from the outermost surface when in use. Furthermore, the sheet-like member 3 may be fixed to the outer surface 11A of the partition 11 by fixing members that are separate from the sheet-like member 3, such as staples or screws. Of course, the sheet-like member 3 may also be fixed to the partition 11 by a combination of two or more of these methods.

[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 component] The cover member 5 is provided to connect to the sheet-like member 3 and covers the sheet-like member 3 provided in the partition portion 11. For example, as shown in Figure 1, four cover members 5 are used so as to connect to the four edges of the sheet-like member 3, forming four extending portions that extend outward from the sheet-like member 3, and as shown in Figure 2, they cover the sheet-like member 3 provided in the partition portion 11. Means for providing the cover member 5 to connect to at least a part of the sheet-like member 3 include, for example, known fixing means such as adhesives, tacks and adhesive tapes, and fixing members such as tackers and screws. Here, the adhesives, tacks and adhesive tapes are preferably non-combustible materials, semi-non-combustible materials, or flame-retardant materials, and it is preferable to incorporate flame retardants into the adhesives, tacks, etc. The cover member 5 is sheet-like and deformable, making it easy to cover the sheet-like member 3.

[0059] As shown in Figure 2, the cover member 5 surrounds the insertion body 21 so that the portion covering the opening 13C of the partition penetration portion 15 is in contact with it, and is fixed to the insertion body 21 by a string-like member 22 wrapped around it from the outside. The string-like member 22 can be any bendable material, and is preferably a wire member including a wire. The wire member may be a metal wire alone, a resin-coated wire made by coating a metal wire with resin such as Nejiriko (registered trademark), or a wire and fiber intertwined, such as a molding. By using a wire member, the cover member 5 can be fixed to the insertion body 21 simply by twisting or turning it.

[0060] The cover member 5 should cover a portion of the sheet-like member 3, making that portion of the sheet-like member 3 invisible from the outside. Specifically, it is preferable to cover the portion of the sheet-like member 3 through which the insertion body 21 is inserted, thereby improving the design of the compartment penetration 15 and enhancing the fire resistance performance of the compartment penetration 15. On the other hand, the cover member 5 is preferably designed to cover a portion of the sheet-like member 3 so that it is visible from the outside. Specifically, as shown in Figure 2, the cover member 5 is preferably designed to 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 when the cover member 5 is installed, it is possible to easily perform a visual inspection to confirm that the sheet-like member 3 is installed in the partition penetration 15.

[0061] It is preferable that the cover member 5 is installed in contact with the sheet-like member 3 and the insertion body 21. By installing the cover member 5 in contact with the sheet-like member 3 and the insertion body 21, the sheet-like member 3 and the cover member 5 can close the opening 13C of the partition 11, thereby improving fire resistance.

[0062] The cover member 5 is installed so as to form a gap 40 between it and the sheet-like member 3. The gap 40 between the sheet-like member 3 and the cover member 5 allows the cover member 5 to be fixed with a margin of error against the axial movement of the insertion body 21. Because the cover member 5 is fixed to the insertion body 21 with a margin of error, even if the insertion body 21, which is positioned inside the sheet-like member 3 and the cover member 5, is moved axially after the sheet-like member 3 and the cover member 5 have been installed, the margin of error of the cover member 5 prevents the sheet-like member 3 and the cover member 5 from moving together with the insertion body 21. By preventing the sheet-like member 3 and the cover member 5 from moving together with the insertion body 21, it is possible to suppress the sheet-like member 3 and the cover member 5 from shifting away from the compartment penetration 15. In other words, with this configuration, the sheet-like member 3 and the cover member 5 can be maintained in the appropriate position within the compartment penetration 15, and the fire resistance of the compartment penetration 15 can be maintained. There is a gap 40 between the sheet-like member 3 and the cover member 5, and various configurations are possible in which the cover member 5 is fixed with a margin of error against the axial movement of the insertion body 21. For example, the cover member 5 may be made of a flexible or stretchable material so that at least a part of it can be bent or curved, and the cover member 5 may be fixed to the insertion body 21 such that at least a part of it has some slack.

[0063] The cover member 5 may consist of a single layer of fire-resistant material, a single layer of non-combustible material, or both a fire-resistant layer and a non-combustible material layer. However, it is preferable to have a non-combustible material layer, and more preferably to consist of a non-combustible material layer. In addition, it may have layers other than the fire-resistant layer and the non-combustible material layer. Examples of such layers include a material layer composed of a material other than a non-combustible material, an adhesive layer, and so on. The cover member 5 preferably includes metal foil such as aluminum foil, glass cloth, or a metal foil composite which is a composite of metal foil and glass cloth such as aluminum glass cloth. These constitute a non-combustible material layer. Among these, aluminum glass cloth is more preferred 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. Having a thickness of the non-combustible material layer below these upper limits provides flexibility to the cover member 5. Therefore, even if the cover member 5 has a non-combustible material layer, it can be wrapped around the outer circumference of the insertion body 21 while being in close contact with it. Furthermore, having a thickness above the lower limit makes it easier to ensure fire resistance.

[0064] As described above, the cover member 5 is preferably a sheet that can be deformed to cover the sheet-like member 3, but it is preferable that it is thinner than the sheet-like member 3 in order to provide flexibility and make deformation easier. 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 fire-resistant layer used in the cover member 5 is preferably a thermally expandable material that expands when heated. The thermally expandable material prevents the spread of fire by expanding during a fire. The thermally expandable material is preferably formed from a thermally expandable resin composition, as described later. The fire-resistant layer may also be adhesive. The thickness of the fire-resistant layer is not particularly limited, but is, for example, 0.01 to 1 mm, preferably 0.05 to 0.5 mm. Having a fire-resistant layer with a thickness below these upper limits provides flexibility to the cover member 5. Therefore, even though the cover member 5 has a fire-resistant layer, it can be wrapped around the outer circumference of the insertion body 21. Furthermore, having a thickness above the lower limit makes it easier to ensure fire resistance.

[0066] The cover member 5 may have an adhesive fire-resistant layer or an adhesive layer. The adhesive fire-resistant layer and the adhesive layer may constitute 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 insertion body 21 without using a fixing member as a separate component from the cover member 5. Furthermore, by making the fire-resistant material layer itself adhesive, it is not necessary to provide an adhesive layer, thus further simplifying the structure of the cover member 5. Furthermore, if the cover member 5 has an adhesive fire-resistant layer or adhesive layer on its outermost surface, a release sheet may be attached to that outermost surface. The release sheet should ideally be peeled off from the outermost surface when in use.

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

[0068] The sheet-like member 3 and the cover member 5 used in construction may be separate components. If they are separate, the sheet-like member 3 can be installed in the partition section 11, the cover member 5 can be attached to the sheet-like member 3, and the installed cover member 5 can then cover the sheet-like member 3. Alternatively, the sheet-like member 3 and the cover member 5 used in construction may be a single unit with the sheet-like member 3 and cover member 5 already attached to each other.

[0069] According to the configuration of this embodiment described above, the gap 13E inside the opening 13C of the compartment penetration 15 is sealed by the sheet-like member 3 and the cover member 5, and at least the sheet-like member 3 has fire-resistant material. Therefore, the compartment penetration treatment structure 10 can be given appropriate fire-resistant performance. Furthermore, in this embodiment, since the fire-resistant structure is formed by the sheet-like member 3 and the cover member 5 without placing filler materials such as fire-resistant putty or rock wool inside the compartment penetration 15, variations due to the worker are eliminated.

[0070] Furthermore, in this embodiment, at least a portion of the sheet-like member 3 and the cover member 5 is exposed and visible from the outside. Also, if fixing members are provided to secure the sheet-like member 3 and the cover member 5, it is preferable to position the fixing members in a location that is also visible from the outside. In addition, no members other than the insertion body 21 are provided inside the partition penetration 15. Therefore, it is easy to check whether the partition penetration treatment material has been installed according to the specifications by visual inspection or photography. This also reduces the likelihood of installation errors.

[0071] The adhesive layer is formed by an adhesive, and examples of adhesives that can be used include acrylic adhesives, urethane adhesives, rubber adhesives, and silicone resin adhesives. The adhesive layer may be non-flammable, semi-non-flammable, or flame-retardant, and flame retardants may be added to the adhesive used. The thickness of the adhesive layer is, for example, 5 to 400 μm, preferably 10 to 150 μm. By having an adhesive layer on one surface 5A of the cover member 5, the cover member 5 can be fixed to the insertion body 21 without using a separate fixing member. Furthermore, if the cover member 5 has an adhesive layer on one surface 5A, a release sheet may be attached to that surface 5A. The release sheet should be peeled off from the surface 5A when in use.

[0072] The cover member 5 is made of an elastic foam that has the flexibility to conform to the outer circumference of the insertion body 21. Specifically, examples of elastic foams include olefin-based resin foams and urethane-based resin foams. 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. Having a thickness of less than or equal to these upper limits provides flexibility to the cover member 5. Therefore, the cover member 5 can be wrapped around the outer circumference of the insertion body 21 while maintaining close contact. Furthermore, having a thickness greater than or equal to the lower limit facilitates the placement of the cover member 5.

[0073] According to the configuration of this embodiment described above, the gap 13E inside the opening 13C of the compartment penetration 15 is sealed by the sheet-like member 3 and the cover member 5, and at least the sheet-like member 3 has a fire-resistant material. Therefore, the compartment penetration treatment structure 10 can be given appropriate fire resistance. Furthermore, as explained above, the partition penetration treatment structure 10 is constructed by preparing a sheet-like member 3 and a cover member 5, first installing the sheet-like member 3 to close the gap 13E between the opening 13C of the partition penetration 15 and the insertion body 21, and then wrapping the cover member 5 around the insertion body 21 at least once, and fixing the cover member 5 so as to cover at least a part of the sheet-like member 3. Therefore, its construction is easy. Furthermore, in this embodiment, since the fire-resistant structure is formed by the sheet-like member 3 and the cover member 5 without placing filler materials such as fire-resistant putty or rock wool inside the compartment penetration 15, variations due to the worker are eliminated.

[0074] Furthermore, although the partition 11 was described as a hollow wall with a hollow section 13 inside, it is not limited to a hollow wall and may be a wall without a hollow section, for example, made of a single wall material. Also, the partition 11 is not limited to the walls of a building, but may be the ceiling or floor of a building. Even in the case of a ceiling or floor, the partition may have a structure with a hollow section between two partition materials, or it may have a structure without a hollow section and may be made of a single partition material, for example.

[0075] The cover member 5 is not limited to the above-described embodiment. For example, in the partition penetration processing structure 10 shown in Figure 1, the cover member 5 is shown as four extending portions that extend outward from the sheet-like member 3, but it may also be a single sheet-like member that is slightly larger than the sheet-like member 3. Furthermore, while Figure 2 shows a partition penetration treatment structure 10 in which the cover member 5 is adhered only to a portion of the surface 3A of the sheet-like member 3, if a single sheet-like cover member 5 that is slightly larger than the sheet-like member 3 is used, the cover member 5 can be adhered to the entire surface 3A of the sheet-like member 3. In other words, the cover member 5 may have a structure in which the sheet-like member 3 is laminated on one surface. In such a structure, it is preferable that the cover member 5 has a non-combustible material layer. By combining a non-combustible material layer and a fire-resistant material layer in the sheet-like member 3 and the cover member 5, fire resistance can be improved. In addition, an adhesive layer may be provided on the surface of the cover member 5 to which the sheet-like member 3 is adhered, and this adhesive layer makes it easy to adhere to the sheet-like member 3. Furthermore, the sheet-like member 3 may have a structure in which one layer of the base material extends outward from the other layers. With such a structure, the extended portion of the base material can be used as the cover member 5. Furthermore, although the partition penetration processing structure 10 shown in Figures 1 and 2 is shown to include a sheet-like member 3 and a cover member 5, the cover member 5 may be omitted. [Examples]

[0076] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. The components used in the examples and comparative examples are shown below.

[0077] (A) Resin component (A-1) Chloroprene rubber (CR) • Skyprene® B-30 (manufactured by Tosoh Corporation, mercaptan modified type, Mooney viscosity (100℃) 45-53) • Skyprene® TSR-54 (manufactured by Tosoh Corporation, mercaptan modified type, Mooney viscosity (100℃) 60-80) • Skyprene (registered trademark) Y-30S (manufactured by Tosoh Corporation, mercaptan modified type, Mooney viscosity (100℃) 111~135) (A-2) Polybutene: Manufactured by JTXTG Energy Co., Ltd., product name "Nisseki Polybutene HV-100" (A-3) Butyl rubber: Manufactured by JSR Corporation, product name "JSR Butyl Rubber 065"

[0078] (B) Thermally expandable layered inorganic material (B-1) EXP-50S 150 (Manufactured by Fuji Graphite Industries Co., Ltd., Expansion start temperature: 150℃) (B-2) ADT-351 (manufactured by ADT, expansion start temperature: 180℃) (B-3) CA-60N (Manufactured by Air Water, Expansion start temperature: 220℃)

[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 size 1 μm, thermal decomposition start temperature 200°C, heat absorption 1000 J / g) • Kisma 10: Magnesium hydroxide (manufactured by Kyowa Chemical Industry Co., Ltd., average particle size 0.9 μm, thermal decomposition start temperature 280°C, heat absorption 1350 J / g) (C-3) Inorganic fillers • 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 ingredients (D-1) Plasticizer • RS-107: Adipate ether ester (manufactured by ADEKA) • DIDP: Diisodecylphthalate (manufactured by Tokyo Chemical Industry Co., Ltd., reagent grade) (D-2) Tackifier: iMarb (petroleum resin, manufactured by Idemitsu Kosan Co., Ltd.)

[0081] The measurement and evaluation methods for each physical property are as follows. (1) Expansion ratio Test specimens (100 mm in length, 100 mm in width, and the same thickness as the refractory material of each example and comparative example) prepared from the refractory materials of each example and comparative example were supplied to an electric furnace and heated at 600°C for 30 minutes. After heating, the thickness of the test specimens was measured, and the expansion ratio was calculated as (thickness of the test specimen after heating) / (thickness of the test specimen before heating). (2) Residue hardness In the above expansion ratio test, after heating at 300°C for 30 minutes, the heated test piece whose expansion ratio was measured was supplied to a compression tester (Kato Tech Co., Ltd., "Finger Feeling Tester") and measured to 0.25 cm. 2 The material was compressed at a speed of 0.1 cm / second using an indenter, and the fracture stress was measured. (3) Residue shape retention While the above-mentioned residue hardness serves as an indicator of the hardness of the residue after expansion, the measurement is limited to the surface portion of the residue and may not be an indicator of the hardness of the entire residue. Therefore, shape retention was measured as an indicator of the hardness of the entire residue. The shape retention of the residue was measured by lifting the test specimen, which had its expansion ratio measured, by hand, and visually observing how easily the residue crumbled. If the test specimen could be lifted without crumbling, it was evaluated as a pass (PASS), and if the test specimen crumbled and could not be lifted, it was evaluated as a fail (FAIL). (4) Fire resistance test A 100mm diameter opening was made in the gypsum board frame, and a 1200mm long electrical cable was routed through the center of the opening so that the space utilization ratio (=cable cross-sectional area / opening area) was 10%, with 300mm extending towards the heating side. The fire-resistant material obtained from the molding process was installed to cover the opening. The material was heated in a vertical furnace for 1 hour according to the heating curve of ISO 834. If the material penetrated without flames, it was evaluated as a pass (PASS), and if it penetrated with flames, it was evaluated as a fail (FAIL).

[0082] Examples 1-23, Comparative Examples 1-3 A fire-resistant resin composition was obtained by mixing resin, thermally expandable layered inorganic material, flame retardant, heat absorbent, inorganic filler, plasticizer, and petroleum resin in a roll at 130°C for 5 minutes according to the formulation shown in Table 1 below. 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 in 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 sheets using the fire-resistant resin composition of the present invention had a sufficient expansion ratio and good residue shape retention. In the fire resistance test, no penetration and flames occurred. On the other hand, the fire-resistant sheet of Comparative Example 1, which does not contain the fire-resistant additive (C), had a high expansion ratio, but the residue hardness was insufficient, and in the residue shape retention test, the test piece collapsed and could not be lifted. Furthermore, in the fire resistance test, penetration and flames occurred. Also, the fire-resistant sheet of Comparative Example 2, which does not contain the thermally expandable layered inorganic material (B), showed penetration and flames as a result of the fire resistance test. Furthermore, the fire-resistant sheet of Comparative Example 3, which does not contain chloroprene rubber as a component (A), did not have sufficient residue hardness, and in the residue shape retention test, the test piece collapsed and could not be lifted. Furthermore, in the fire resistance test, penetration and flames occurred. [Explanation of Symbols]

[0085] 3 Sheet-like member 5 Cover component 10 Compartment penetration treatment structure 11 Partition section 12A, 12B Wall materials 13 Hollow part 13A,13B through hole 13C,13D opening 13E Gap 15 Compartment Penetration 21 Insertion body 22 String-like member 30A,...30Y,30Z Base material 31A,...31Y,31Z Fireproof material layer 32 slits 33 Adhesive layer 40 void

Claims

1. (A) A resin component containing chloroprene rubber, (B) thermally expandable graphite, and (C) a fire-resistant additive containing a flame retardant, a heat absorbent and / or an inorganic filler, The flame retardant is a fire-resistant material comprising a fire-resistant resin composition containing a phosphorus atom-containing compound, The fire-resistant material comprises a base material integrated with the aforementioned fire-resistant material, The heat absorbent is a hydrated metal compound consisting of a metal hydroxide and / or a hydrate of a metal salt. The substrate is a metal foil or a metal foil composite. The chloroprene rubber content in the resin component is 30 to 100% by mass. A fire-resistant laminate used in the fire-resistant structure of a building, wherein the expansion ratio of the fire-resistant material, as measured by the following method, is 15 to 70 times. <Method for measuring expansion ratio> The test specimen was fed into an electric furnace and heated at 600°C for 30 minutes. After that, the thickness of the test specimen was measured, and the expansion ratio was calculated as (thickness of the test specimen after heating) / (thickness of the test specimen before heating).

2. The refractory laminate according to claim 1, wherein the content of (B) thermally expandable graphite is 50 to 1000 parts by mass per 100 parts by mass of (A) resin component.

3. The refractory laminate according to claim 1 or 2, wherein the content of (B) thermally expandable graphite is 15 to 75 parts by mass per 100 parts by mass of the refractory resin composition.

4. The fire-resistant laminate according to any one of claims 1 to 3, wherein the thermal expansion onset temperature of (B) thermally expandable graphite is 100 to 300°C.

5. A fire-resistant laminate according to any one of claims 1 to 4, further comprising an elastomer as a resin component.

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