JP6791655B2 - Fireproof structure of the compartment and its formation method - Google Patents

Description

The present invention relates to a fireproof structure of a compartment and a method for forming the same. More specifically, the present invention fires in the event of a fire through a gap between a through hole formed in a compartment such as a wall, floor, or ceiling of a building and a pipe such as a pipe or cable inserted through the through hole. Alternatively, the present invention relates to a fireproof structure of a partition body for preventing heat leakage and a method for forming the same.

A refractory filler such as a refractory putty or a refractory resin composition is used to close the through holes formed in the building compartment for arranging pipes such as pipes or cables. ing. If the wall constituting the compartment is thin, the space between the wall constituting the compartment and the pipe body in the compartment through hole may be simply filled with a fire-resistant filler, but the wall constituting the compartment If is a relatively thick hollow wall, the hollow portion between the two wall members of the hollow wall cannot be filled with a fire resistant filler so as to extend from one end of the two wall members to the other. There is a problem that the fire of the fire penetrates the hollow portion and the fire-resistant filler 23 falls downward in the hollow portion.

Therefore, for example, in Patent Document 1, a metal sleeve is installed in the through hole of the compartment, and between the outer peripheral surface of a plurality of pipes passed through the sleeve and the inner peripheral surface of the sleeve. A technique of filling a refractory putty to close a through hole is disclosed. Further, Patent Document 2 discloses that a plurality of partition plates are arranged side by side in the lateral direction and the lateral direction of the fireproof partition wall, and a penetrating portion is formed inside the partition plates.

Japanese Unexamined Patent Publication No. 2014-137085 (see paragraph 0051, Fig. 5-8 in particular) JP-A-2015-19853 (see paragraph 0029, Fig. 1 in particular)

However, since the dimensions of metal sleeves and partition plates are predetermined, it is necessary to cut them according to the diameter and length of the through holes in the compartment, which is not widely accepted in the field. I can not say.

An object of the present invention is to provide a fireproof structure of a compartment and its formation which can be easily constructed according to the design of the compartment through hole.

According to one aspect of the present invention, a fireproof structure of a building compartment having through holes through which one or more pipes are inserted, and two wall members having hollow portions formed between them. The refractory cover is provided with a partition body made of a wall and a refractory cover installed in the through hole so as to extend between the two wall members across the hollow portion, and the refractory cover is a cylinder having thermal expansion property. It has a shaped main body portion and a flange portion protruding from one end of the main body portion toward the axial outer circumference of the main body portion, and the flange portion provides a fireproof structure of a compartment arranged outside the wall. Will be done.

According to another aspect of the present invention, it is a method of forming a fireproof structure of a compartment of the building, in which a fireproof cover is inserted into the through hole, and the hollow portion is sandwiched between two wall members of the wall. Provided is a method for forming a fireproof structure of a compartment, comprising installing the fireproof cover in the through hole and providing the flange portion on the outside of the wall so as to extend over the wall.

According to yet another aspect of the present invention, it is a fireproof structure of a building compartment having through holes through which one or more pipes are inserted, and two walls having hollow portions formed between them. Provided is a fireproof structure of a compartment including a compartment of a building composed of a wall having members and an inflatable closing member provided so as to extend between the two wall members across the hollow portion.

According to another aspect of the present invention, there is a method of forming a fireproof structure of a building compartment of the other aspect, and the hollow portion extends between the two wall members so as to extend over the hollow portion. Provided is a method for forming a fireproof structure of a compartment body, which comprises filling with an expandable closing member.

According to the present invention, it is possible to easily construct a fireproof structure of a compartment in the field according to the design of the compartment through hole. In addition, the fire resistance in the hollow portion of the wall constituting the compartment in the compartment through hole is improved.

FIG. 3 is a cross-sectional view of a fireproof structure of the compartment of the first embodiment of the present invention. The perspective view of the refractory cover of FIG. (A)-(D) The figure which shows the formation method of the fire protection structure of FIG. FIG. 3 is a cross-sectional view of a modified example of the refractory cover of the first embodiment. FIG. 3 is a cross-sectional view of a modified example of the refractory cover of the first embodiment. (A) A development view of a modified example of the fireproof cover of the first embodiment, and (B) an assembly view of a modified example of the fireproof cover of the first embodiment. FIG. 3 is a cross-sectional view of a modified example of the refractory cover of the first embodiment. FIG. 3 is a cross-sectional view of a fireproof structure of a compartment according to a second embodiment of the present invention. (A)-(C) Schematic diagram showing an example of an inflatable closing member. The figure which shows the forming method of the fire protection structure of FIG.

In the fireproof structure of the compartment of the present invention, the compartment of the building is composed of a wall having two wall members having a hollow portion formed between them, and pipes (pipes) such as pipes or cables are inserted therethrough. This is to prevent fire and heat from leaking from the hollow portion and from the gap between the wall forming the through hole and the pipe body when the through hole is provided.

First, the fireproof structure of the building compartment of the first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

As shown in FIG. 1, the fireproof structure 10 (hereinafter, simply referred to as a fireproof structure) of the building compartment 11 of the first embodiment includes a through hole 15 through which one or more pipes 30 are inserted. ing. The compartment 11 is a hollow wall 12 in the present embodiment, for example, a partition wall in which gypsum boards are fixed on both sides so as to sandwich a wooden or steel stud.

A through hole 15 is formed in the compartment 11, and adjacent fire prevention compartments A and B communicate with each other through the through hole 15.

The shape of the through hole 15 is a circular shape in a cross-sectional view in the illustrated example, but may be various shapes such as a rectangular shape in a cross-sectional view. The pipe body 30 is various pipes (for example, water pipes, water supply pipes, drain pipes, refrigerant pipes, etc.) and cables (for example, electric wires, optical fiber cables, etc.), and one of them is passed through in the illustrated example. In the present embodiment, an example in which the compartment 11 is composed of a wall that vertically partitions adjacent fire protection compartments A and B is described, but the scope of the present invention is not limited to this embodiment. The scope of the present invention also includes a fireproof structure of a compartment including a ceiling or a floor that horizontally partitions adjacent fireproof compartments.

The fireproof structure 10 extends the entire length of the hollow portion 14 between the compartment 11 of the building having the hollow wall 12 having the two wall members 13 formed between the hollow portions 14 and the two wall members 13. It is provided with a fireproof cover 16 installed in the through hole 15 so as to extend. Each of the two wall members 13 is composed of a pair of wall members in this embodiment.

The fire-resistant cover 16 has a cylindrical main body 17 having thermal expansion properties, and a flange portion 18 projecting from one end 17a of the main body 17 toward the outer periphery of the main body 17 in the axial direction. Is provided on the outside of the hollow wall 12. That is, the flange portion 18 is arranged on the opposite side of the hollow wall 12 from the hollow portion 14.

The main body 17 has openings 21 and 22 at both ends and is formed in a cylindrical shape having a constant outer diameter in the axial direction, and the tubular body 30 is inserted into the internal cavity 20. Further, the refractory filler 23 is filled between the refractory cover 30 and the refractory cover 16 in a state where the pipe body 30 is arranged in the cavity 20 of the main body 17 of the refractory cover 16 in the through hole 15. There is. As the refractory filler 23, a conventionally known thermally expandable or non-thermally expandable clay-like refractory material, for example, a refractory putty can be used.

In the present embodiment, the flange portion 18 has a substantially annular plate shape having a predetermined thickness. The flange portion 18 does not necessarily have to have a circular outer shape, and may be a polygon (preferably a regular polygon) such as a quadrangle or a hexagon. The outer shape of the flange portion 18 (outer diameter in the present embodiment) is larger than the outer shape of the through hole 15 (diameter in the present embodiment), and when the main body portion 17 is inserted into the through hole 15 of the compartment 11, the flange portion 18 abuts on the outer surface of the compartment 11. By fixing the flange portion 18 to the outer surface of the compartment 11 using an adhesive, an adhesive, an adhesive tape, or other fixing tool such as a screw, even if the main body portion 17 is not fitted into the through hole 15. , The main body 17 can be fixed to the compartment 11. It is preferable that the flange portion 18 is provided at one end of the main body portion 17 by integrally molding with the same material as the main body portion 17, but the flange portion 18 is formed of a material different from the main body portion 17 and is formed by using an adhesive, an adhesive or the like. It may be retrofitted to one end of the main body 17. When the flange portion 18 is formed of a material different from that of the main body portion 17, the flange portion 18 does not necessarily have to have thermal expansion property, but preferably has fire resistance.

The axial length of the main body 17 (hereinafter, simply referred to as the length of the main body 17) is not particularly limited, but is longer than the total length of the through hole 15 (that is, the thickness of the compartment 11). It is preferably set, and when the flange portion 18 at one end of the main body portion 17 comes into contact with the outer surface of the compartment 11, the other end in the axial direction of the main body portion 17 (hereinafter, simply referred to as the other end of the main body portion 17). It is preferable that the main body 17 is arranged over the entire length of the through hole 15 at the same position as the end of the through hole 15 of the compartment 11. Alternatively, the length of the main body portion 17 may be set shorter than the total length of the through hole 15 so that it can be easily inserted into the through hole 15, and when the flange portion 18 comes into contact with the outer surface of the compartment 11. The other end of the main body 17 may have a length that crosses the through hole 15 but does not protrude outward from the compartment 11, or the other end of the main body 17 may be in the center of the through hole 15 of the compartment 11. It may be located.

The outer diameter of the main body 17 may be the same as or slightly larger than the diameter of the through hole 15 as long as the main body 17 can be inserted into the through hole 15 of the compartment 11. It may be slightly smaller than the diameter. The thickness of the main body 17 is not particularly limited as long as it has a size that can at least close the through hole 15 when the main body 17 is thermally expanded by the heat of a fire. However, if the thickness of the main body 17 is large, the fire prevention performance is improved, but the insertion of the tube 30 becomes difficult and the cost increases accordingly. Therefore, the thickness of the main body 17 is set by this trade-off.

The main body portion 17, preferably the flange portion 18, is formed of, for example, a heat-expandable refractory material composed of a resin composition containing a heat-expandable layered inorganic substance and an inorganic filler as resin components. Since the main body portion 17, preferably the flange portion 18, is formed of a heat-expandable refractory material made of a resin composition, the operator can cut the refractory cover 16 according to the shape and dimensions of the through hole 15. According to the design of the through hole 15, it is possible to easily construct the fireproof structure of the compartment on site. Further, by arranging the fire-resistant cover 16 having a size suitable for the through hole 15 so as to close the hollow portion 14 of the hollow wall 12, the fire resistance of the hollow portion 14 of the hollow wall 12 is improved.

The main body portion 17, preferably the flange portion 18, contains each component of the heat-expandable refractory material as known as a single-screw extruder, a twin-screw extruder, a Banbury mixer, a kneader mixer, a kneading roll, a Raikai machine, a planetary stirrer, and the like. It can be obtained by kneading using an apparatus and molding by a known molding method.

As the resin component, known resin components can be widely used, and examples thereof include thermoplastic resins, thermosetting resins, rubber substances, and combinations thereof.

Examples of the thermoplastic resin include polyolefin resins such as polypropylene resin, polyethylene resin, poly (1-) butene resin, and polypentene resin, polystyrene resin, acrylonitrile-butadiene-styrene (ABS) resin, polycarbonate resin, and polyphenylene ether resin. Meta) Examples thereof include synthetic resins such as acrylic resin, polyamide resin, polyvinyl chloride resin, novolak resin, polyurethane resin and polyisobutylene.

Examples of the thermosetting resin include synthetic resins such as polyurethane, polyisocyanurate, polyisocyanurate, phenol resin, epoxy resin, urea resin, melamine resin, unsaturated polyester resin, and polyimide.

As rubber substances, natural rubber, isoprene rubber, butadiene rubber, 1,2-polybutadiene rubber, styrene-butadiene rubber, chloroprene rubber, nitrile rubber, butyl rubber, chlorinated butyl rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber (EPDM) ), Chlorosulfonated polyethylene, acrylic rubber, epichlorohydrin rubber, polyvulture rubber, non-vulture rubber, silicon rubber, fluororubber, urethane rubber and other rubber substances.

As these synthetic resins and / or rubber substances, one kind or two or more kinds can be used.

Among these synthetic resins and / or rubber substances, those having flexible and rubber-like properties are preferable. The resin component having such properties can be highly filled with an inorganic filler, and the obtained resin composition becomes flexible and easy to handle. In order to obtain a more flexible and easy-to-handle resin composition, a non-vulcanized rubber such as butyl and a polyethylene-based resin are preferably used. Instead, an epoxy resin is preferable from the viewpoint of increasing the flame retardancy of the resin itself and improving the fireproof performance.

The thermally expandable layered inorganic substance expands when heated. The heat-expandable layered inorganic substance is not particularly limited, and examples thereof include vermiculite, kaolin, mica, and heat-expandable graphite. Thermally expandable graphite is a conventionally known substance that expands when heated. Powders such as natural scaly graphite, thermally decomposed graphite, and kiss graphite are mixed with inorganic acids such as concentrated sulfuric acid, nitric acid, and selenic acid, and concentrated nitric acid and perchloric acid. A graphite interlayer compound is formed by treatment with a strong oxidizing agent such as chloric acid, perchlorate, permanganate, dichromate, dichromate, hydrogen peroxide, etc., and is a layer of carbon. It is a kind of crystalline compound that maintains its structure.

The heat-expandable graphite obtained by the acid treatment as described above may be further neutralized with ammonia, an aliphatic lower amine, an alkali metal compound, an alkaline earth metal compound or the like. The particle size of the heat-expandable graphite is preferably 20 to 200 mesh. If the particle size is 200 mesh or smaller, the degree of expansion of graphite is sufficient to obtain an expanded heat insulating layer, and if the particle size is 20 mesh or larger, the dispersibility when blended with the resin is good and the physical properties are poor. It is good. Examples of commercially available products of heat-expandable graphite include "GREP-EG" manufactured by Tosoh Corporation and "GRAFGUARD" manufactured by GRAFTECH.

When the expanded heat insulating layer is formed, the inorganic filler increases the heat capacity and suppresses heat transfer, and also acts as an aggregate to improve the strength of the expanded heat insulating layer. The inorganic filler is not particularly limited, and for example, metal oxides such as alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, and ferrite; calcium hydroxide, magnesium hydroxide, etc. Metal hydroxides such as aluminum hydroxide and hydrotalcite; metal carbonates such as basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, strontium carbonate and barium carbonate; inorganic phosphate as a flame retardant; calcium sulfate , Gypsum fiber, calcium salts such as calcium silicate; silica, diatomaceous earth, dosonite, barium sulfate, talc, clay, mica, montmorillonite, bentonite, active white clay, sepiolite, imogolite, sericite, glass fiber, glass beads, silica-based balun , Aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balun, charcoal powder, various metal powders, potassium titanate, magnesium sulfate, lead zirconate titanate, zinc stearate, calcium stearate, aluminum borate , Molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag fiber, fly ash, dehydrated sludge and the like. One or more of these inorganic fillers can be used.

The particle size of the inorganic filler is preferably 0.5 to 100 μm, more preferably 1 to 50 μm. When the amount of the inorganic filler added is small, the dispersibility greatly affects the performance, so that the inorganic filler has a small particle size, but when it is 0.5 μm or more, the dispersibility is good. When the amount added is large, the viscosity of the resin composition increases and the moldability decreases as the high filling progresses, but the viscosity of the resin composition can be decreased by increasing the particle size. A particle having a large diameter is preferable, but a particle size of 100 μm or less is desirable from the viewpoint of the surface properties of the molded product and the mechanical properties of the resin composition.

Among the inorganic fillers, specific examples of aluminum hydroxide include, for example, "Heidilite H-31" (manufactured by Showa Denko) with a particle size of 18 μm and "B325" (ALCOA) with a particle size of 25 μm. Calcium carbonate includes "Whiten SB Red" (manufactured by Bihoku Powder Industry Co., Ltd.) having a particle size of 1.8 μm, and "BF300" (manufactured by Bikita Powder Industry Co., Ltd.) having a particle size of 8 μm.

As the inorganic filler, one kind or two or more kinds can be used.

Further, the resin composition constituting the heat-expandable refractory material may further contain a phosphorus compound in addition to the above-mentioned components in order to increase the strength of the expansion heat insulating layer and improve the fire prevention performance. The phosphorus compound is not particularly limited, and for example, various phosphoric acid esters such as red phosphorus; triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresil diphenyl phosphate, xylenyl diphenyl phosphate; sodium phosphate, Metal phosphates such as potassium phosphate and magnesium phosphate; ammonium polyphosphate; compounds represented by the following chemical formula (1) can be mentioned. Of these, red phosphorus, ammonium polyphosphate, and the compound represented by the following chemical formula (1) are preferable from the viewpoint of fire protection performance, and ammonium polyphosphate is more preferable from the viewpoint of performance, safety, cost, and the like.

In the chemical formula (1), R ¹ and R ³ represent hydrogen, a linear or branched alkyl group having 1 to 16 carbon atoms, or an aryl group having 6 to 16 carbon atoms, which are the same or different. R ² is a hydroxyl group, a linear or branched alkyl group having 1 to 16 carbon atoms, a linear or branched alkoxyl group having 1 to 16 carbon atoms, an aryl group having 6 to 16 carbon atoms, or carbon. It shows the aryloxy group of the number 6-16.

As the red phosphorus, commercially available red phosphorus can be used, but from the viewpoint of moisture resistance and safety such as not spontaneously igniting during kneading, those in which the surface of the red phosphorus particles is coated with a resin are preferably used. The ammonium polyphosphate is not particularly limited, and examples thereof include ammonium polyphosphate and melamine-modified ammonium polyphosphate. Ammonium polyphosphate is preferably used from the viewpoint of handleability and the like. Examples of commercially available products include "AP422" and "AP462" manufactured by Clariant AG, "FR CROS 484" and "FR CROS 487" manufactured by Budenheim Ibica.

The compound represented by the chemical formula (1) is not particularly limited, and for example, methylphosphonate, dimethyl methylphosphonate, diethylmethylphosphonate, ethylphosphonate, n-propylphosphonic acid, n-butylphosphonic acid, 2-methylpropylphosphonate. Acid, t-butylphosphonic acid, 2,3-dimethyl-butylphosphonate, octylphosphonate, phenylphosphonic acid, dioctylphenylphosphonate, dimethylphosphonate, methylethylphosphinic acid, methylpropylphosphinic acid, diethylphosphinic acid, dioctylphosphonate Examples thereof include acids, phenylphosphonates, diethylphenylphosphonates, diphenylphosphonates, and bis (4-methoxyphenyl) phosphonates. Among them, t-butylphosphonic acid is preferable in terms of high flame retardancy, although it is expensive. The above phosphorus compounds can be used alone or in combination of two or more.

The resin composition has a range of 10 to 350 parts by weight of the thermally expandable layered inorganic substance and 30 to 400 parts by weight of the inorganic filler with respect to 100 parts by weight of the resin component such as the thermoplastic resin, epoxy resin, and butyl rubber. It is preferable to include in.

The total amount of the thermally expandable layered inorganic substance and the inorganic filler is preferably in the range of 50 to 600 parts by weight with respect to 100 parts by weight of the resin component.

Such a resin composition expands by heating to form a refractory heat insulating layer. According to this composition, the heat-expandable refractory material expands by heating such as a fire to obtain a required coefficient of thermal expansion, and after expansion, a residue having a predetermined heat insulating performance and a predetermined strength is formed. It is also possible to achieve stable fire protection performance.

When the total amount of the heat-expandable layered inorganic substance and the inorganic filler in the resin composition is 50 parts by weight or more, sufficient fire resistance is obtained by satisfying the residual amount after combustion, and when it is 600 parts by weight or less, it is mechanical. Physical properties are maintained.

Further, the resin composition used in the present invention can be used as an antioxidant such as phenol-based, amine-based, sulfur-based, plasticizer, and metal damage prevention, if necessary, as long as the object of the present invention is not impaired. Additives such as agents, antistatic agents, stabilizers, cross-linking agents, lubricants, softeners, pigments, tackifier resins, molding aids, and tackifiers such as polybutene and petroleum resins can be included.

The heat-expandable refractory material is available as a commercial product. For example, a fire barrier manufactured by Sumitomo 3M Co., Ltd. (a heat-expandable refractory material composed of a resin composition containing chloroprene rubber and vermiculite, expansion coefficient: 3 times, heat Conductivity: 0.20 kcal / m · h · ° C), Mitsui Kinzoku Paint Co., Ltd.'s Medihicut (coefficient of thermal expansion made of a resin composition containing a polyurethane resin and heat-expandable graphite, expansion coefficient: 4 times, heat (Conductivity: 0.21 kcal / m · h · ° C)), a heat-expandable refractory material such as Fiblock manufactured by Sekisui Chemical Industry Co., Ltd. can also be mentioned.

The heat-expandable refractory material is not particularly limited as long as it is insulated by the expansion layer when exposed to a high temperature such as in a fire and the expansion layer has strength. It is preferable that the volume expansion coefficient after heating for 30 minutes under the heating condition of 50 kW / m ² is 3 to 50 times. When the volume expansion coefficient is 3 times or more, the expansion volume can sufficiently fill the burned portion of the resin component, and when the expansion volume is 50 times or less, the strength of the expansion layer is maintained and the penetration of flame is prevented. The effect is maintained.

Next, a method of forming a fireproof structure of the compartment of the first embodiment will be described. First, as shown in FIG. 3A, the fireproof cover 16 is inserted into the through hole 15 of the compartment 11 from the side of one of the fireproof compartments A partitioned by the compartment.

Then, as shown in FIG. 3B, the refractory cover 16 is installed in the through hole 15 so as to extend between the two wall members 13 of the hollow wall 12 over the hollow portion 14. Here, the refractory cover 16 "extends between the two wall members 13 of the hollow wall 12 over the hollow portion 14" means that the refractory cover 16 prevents the invasion of flames in the through hole 15 when expanded by heating. It suffices if the refractory cover 16 extends across the hollow portion 14 to the extent that it can be reduced, and it is not necessary for the refractory cover 16 to extend over the entire length of the thickness of the two wall members 13 of the hollow wall 12. In 3 (B), the fireproof cover 16 is shown to extend not only over the entire length of the hollow portion 14 but also over the entire length of the thickness of the two wall members 13.

When the main body 17 is inserted into the through hole 15 until the flange 18 of one end 17a of the main body 17 of the fireproof cover 16 comes into contact with the outer surface of the compartment 11, the flange 18 is inserted into an adhesive, an adhesive, an adhesive tape, etc. In addition, the main body 17 is fixed to the compartment 11 by fixing to the outer surface of the compartment 11 using a fixing tool such as a screw (FIG. 3 (B)).

Then, as shown in FIG. 3C, the pipe body 30 is inserted into the main body 17 from the opening 22 (from the side of the fireproof compartment B) on the other end 17b side of the main body 17, and one end 17a side. It protrudes from the opening 21.

After that, as shown in FIG. 3D, the refractory filler 23 is filled from the opening 21 on the one end 17a side of the main body 17 (from the side of the fireproof compartment A), and the pipe body is filled with the refractory filler 23. Close the gap around 30. As a result, as shown in FIG. 1, the fireproof cover 16 is installed on the penetrating portion 12 of the compartment 11, and the fireproof structure 10 of the compartment 11 is constructed.

In the fireproof structure 10 in which the fireproof cover 16 is used as described above, even if a fire occurs in the fireproof compartment A or the fireproof compartment B, at least the main body 17 of the fireproof cover 16 expands due to the heat of the fire to form a through hole 15. At the same time, even if the pipe body 30 is melted or burned to create a space in the event of a fire, the space created by the pipe body 30 being melted or burned by the thermal expansion of the main body 17 is filled. As a result, the hollow portion 14 of the hollow wall 12 and the through hole 15 of the compartment 11 can be completely closed, so that flames and heat can be prevented from leaking from the through hole 15 to the adjacent fire protection compartment. Further, the refractory filler 23 can prevent flames and heat from passing through the through hole 15 before the main body 17 thermally expands. Therefore, good fire protection performance can be stably exhibited.

Although the present invention has been described above with respect to the first embodiment, the present invention is not limited to the above first embodiment, and various modifications such as the following are possible as long as the gist of the present invention is not deviated.

The flange portion 18 is provided after the fireproof cover 16 is inserted into the through hole 15 from one fireproof compartment B instead of being provided in advance in the fireproof cover 16, and one end of the fireproof cover 16 reaches the other fireproof compartment A. Then, one end of the refractory cover 16 may be formed by projecting toward the outer periphery of the main body 17 in the axial direction.

In FIGS. 3A to 3C, the refractory cover 16 is inserted into the through hole 15 of the compartment 11, and then the pipe body 30 is inserted into the main body 17 of the refractory cover 16. The fireproof cover 16 may be installed in the through hole 15 after the pipe body 30 is inserted into the through hole 15.

As shown in FIG. 4, the main body portion 17 may be formed with a notch 19 extending from one end to the other end in the axial direction, including the flange portion 18. As a result, the main body 17 can be opened and closed at the position of the notch 19, that is, the right side portion R and the left side portion L of the notch 7 can be separated from each other in the direction of the arrow with the connecting portion C of the main body 17 as a fulcrum. An opening is formed at the position of the notch 19.

The main body 17 is opened at the position of the notch 19, the tubular body 30 is inserted into the main body 17 through the opening, the main body 17 is closed again, and then the main body 17 is slid along the tubular body 30 to form a through hole 15. By inserting it inside, the fireproof cover 16 can be installed in the through hole 15. That is, not only before the pipe body 30 is inserted into the through hole 15, but also after the pipe body 30 is inserted into the through hole 15 at the same time as the pipe body 30 by providing the notch 19 in the main body portion 17. However, the fireproof cover 16 can be installed.

Further, the right side portion R and the left side portion L are shifted inward and outward in the axial direction of the refractory cover 16 (main body portion 17) to reduce the outer diameter of the main body portion 17. Therefore, in a state where the outer diameter of the main body portion 17 is reduced, the operator is partitioned by the compartment from the side of one compartment (B compartment) in which the flange portion 18 is partitioned by the compartment 11 through the through hole. The flange portion 18 can be provided on the outside of the hollow wall 12 in the A section while the operator is in the B section by projecting to the other section (A section). Further, if the step of filling the fire-resistant filler 23 between the pipe body 30 and the fire-resistant cover 16 is also performed from the B section, the operator can perform all the steps of the method of forming the fireproof structure of the section in one B section. Can be done from.

A notch 19 is formed in the main body 17 by combining the above two modifications, and the flange 18 is formed by projecting one end of the fireproof cover 16 toward the outer periphery of the main body 17 in the axial direction. It may be. In this case, the refractory cover 16 can be formed from a single sheet of heat-expandable refractory material.

-As shown in FIG. 5, the flange portions 18 may be on both sides of the main body portion 17. That is, the flange portion 18 of the first embodiment is the first flange portion 18a, the first flange portion 18 is arranged outside one wall 13 of the hollow wall 12, and the fireproof cover 16 is the main body portion 17. The second flange portion 18b has a second flange portion 18b protruding from the end 17b on the side opposite to one end 17a toward the axial outer circumference of the main body portion 17, and the second flange portion 18b is outside the other wall 13 of the hollow wall 12. May be placed in.

In the first embodiment, the through hole 15 has a circular shape in cross section, and the main body 17 of the fire resistant cover 16 is also tubular, but the fire resistant cover 16 is arranged in the through hole 15 having a substantially rectangular cross section. It may be a configuration. For example, as shown in FIG. 6A, the refractory cover 16 is made of a piece of substantially rectangular sheet-shaped heat-expandable refractory material, and the solid line is cut off and the dotted line is bent to show FIG. 6B. Assembled as shown, the main body portion 17 and the flange portion 18 may be formed and arranged in the through hole 15. Further, as shown in FIG. 5, when the flange portions 18 are provided on both sides of the main body portion 17, cuts are made at both ends of one substantially rectangular sheet-shaped fireproof cover 16 and the flange portions 18 are formed. Just do it.

Although the main body 17 is arranged over the entire length of the through hole 15, the length of the main body 17 may be shorter than the total length of the through hole 15, and the flange 18 comes into contact with the outer surface of the compartment 11. At that time, the other end 17b of the main body 17 may be located at the center of the through hole 15, for example. For example, as shown in FIG. 7, the two refractory covers 16 may be arranged adjacent to or in contact with each other so that the flange portion 18 abuts on the outer surface of each of the two wall members 13. As described above, it is sufficient that the refractory cover 16 extends over the hollow portion 14 to the extent that the refractory cover 16 can prevent or reduce the invasion of flames in the through hole 15 when expanded by heating, and a plurality of refractory covers 16 May be arranged side by side along the axial direction of the through hole 15 so as to be in contact with or separated from each other.
-The structure of the wall as the compartment 11 is not limited to the hollow wall 12, and may be, for example, a reinforced concrete structure (RC) or a lightweight aerated concrete structure (ALC).

Next, the fireproof structure of the compartment of the second embodiment of the present invention will be described with reference to FIG. The description of the same members as those in the first embodiment will be omitted.

As shown in FIG. 8, one or a plurality of pipes 30 are inserted through the through holes 15 of the fireproof structure 10 of the building compartment 11 of the second embodiment. The compartment 11 of the building is composed of a hollow wall 12 having two wall members 13 having a hollow portion 14 formed between them, and expands so as to extend between the two wall members 13 over the entire length of the hollow portion 14. A sex blocking member 24 is provided.

The expandable closing member 24 may be, for example, a material 24a that foams and hardens as shown in FIG. 9A or a molded product formed from such a material, or as shown in FIG. 9B. , An airtight bag 24b formed of a synthetic resin or the like and expanded by injecting air into the bag, or as shown in FIG. 9C, an airtight bag formed of a synthetic resin or the like. The bag 24c may contain a material 24d that is foamed and cured. The bags 24b, 24c may be transparent or opaque. The bags 24b and 24c may be compressed by decompression such as opening an air hole. Examples of the synthetic resin constituting the bags 24b and 24c include polyethylene, polypropylene, and polyvinyl chloride. By using the bags 24b and 24c, the inflatable closing member 24 can easily close the hollow portion 14 against gravity.

Returning to FIG. 8, in the present embodiment, the inflatable closing member 24 is provided in a substantially annular shape so as to cover the periphery of the compartment through hole 15. Preferably, the inflatable closing member 24 is provided between the two wall members 13 and in a space defined by the through holes 15. By arranging the expandable closing member 24 across the hollow portion 14 between the two wall members 13 of the hollow wall 12 in this way, the fire resistance of the hollow portion 14 of the hollow wall 12 is improved. As in the first embodiment, the inflatable closing member 24 has a refractory cover 16 extending across the hollow portion 14 to such an extent that the expanding closing member 24 can prevent or reduce the invasion of flames in the through hole 15. Well, it is not necessary to cover the entire length of the thickness of the two wall members 13.

With the pipe body 30 arranged in the through hole 15, the refractory filler 23 is filled between the pipe body 30 and the hollow wall 12 (and its two wall members 13). As the refractory filler 23, a conventionally known thermally expandable or non-thermally expandable clay-like refractory material, for example, a refractory putty can be used.

When the expandable closing member 24 is formed of the materials 24a and 24d that foam and cure, the composition is not particularly limited, but preferably flame-retardant containing a thermosetting urethane that foams and cures due to heat such as a fire. It is a urethane resin composition, and as such an example, there is a flame-retardant urethane resin composition capable of forming a flame-retardant polyurethane foam described in PCT / JP2015 / 055791.

The resin composition containing the thermosetting urethane contains the following components (A)-(F):
(A) First solution containing polyisocyanate,
(B) Second liquid containing polyol,
(C) Trimerization catalyst,
(D) Foaming agent,
From (E) foam stabilizer and (F) red phosphorus, phosphorus ester, phosphate-containing flame retardant, bromine-containing flame retardant, boron-containing flame retardant, antimony-containing flame retardant, metal hydroxide, and acicular filler. It is formed by mixing an additive containing at least one selected, which is cured to form a flame retardant polyurethane foam.

Since the flame-retardant urethane resin composition obtained by mixing the above components (A)-(F) reacts and cures, its viscosity changes with the passage of time. Therefore, before using the flame-retardant urethane resin composition, the flame-retardant urethane resin composition is divided into two or more as an in-situ foaming system, and the flame-retardant urethane resin composition reacts and cures. To prevent. Then, when the flame-retardant urethane resin composition is used, the flame-retardant urethane resin composition can be obtained by combining the flame-retardant urethane resin compositions divided into two or more into one.
In-situ foaming system, flame-retardant urethane resin composition, and flame-retardant polyurethane foam When the flame-retardant urethane resin composition is divided into two or more, the flame-retardant urethane resin composition divided into two or more. Curing of each component alone does not start, and each component may be divided so that the curing reaction starts after mixing each component of the flame-retardant urethane resin composition.

The flame-retardant urethane resin composition may be cured by mixing and at room temperature, but each component may be preheated.

The above-mentioned trimerization catalyst (C), foaming agent (D), defoaming agent (E), and additive (F) may be contained in either the first liquid or the second liquid, respectively. However, it may be provided as a third and subsequent liquids different from the first and second liquids, but preferably the trimerization catalyst (C), the foaming agent (D), and the defoaming agent (E). , And the additive of (F) are mixed in the second liquid. Further, the other component of (G) described above may be contained in either the first liquid or the second liquid, and may be provided as a third or subsequent liquid different from the first liquid and the second liquid. It is good, but preferably mixed in the second liquid.

Hereinafter, each of the components (A) to (F) will be described in detail.
(A) Polyisocyanate
Examples of the polyisocyanate that is the main component of the urethane resin include aromatic polyisocyanates, alicyclic polyisocyanates, and aliphatic polyisocyanates.

Examples of the aromatic polyisocyanate include phenylenediocyanate, tolylene diisocyanate, xylylene diisocyanate, diphenylmethane diisocyanate, dimethyldiphenylmethane diisocyanate, triphenylmethane triisocyanate, naphthalene diisocyanate, polymethylene polyphenyl polyisocyanate and the like.

Examples of the alicyclic polyisocyanate include cyclohexylene diisocyanate, methylcyclohexylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, and dimethyldicyclohexylmethane diisocyanate.

Examples of the aliphatic polyisocyanate include methylene diisocyanate, ethylene diisocyanate, propylene diisocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate and the like.

One type or two or more types of polyisocyanate can be used. The main agent of the urethane resin is preferably polymethylene polyphenyl polyisocyanate because it is easy to use and easily available.
(B) Polyurethane Examples of the polyol that is a curing agent for the urethane resin include polylactone polyol, polycarbonate polyol, aromatic polyol, alicyclic polyol, aliphatic polyol, polyester polyol, polymer polyol, and polyether polyol.

Examples of the polylactone polyol include polypropiolactone glycol, polycaprolactone glycol, polyvalerolactone glycol and the like.

Examples of the polycarbonate polyol include a polyol obtained by a dealcohol reaction between a hydroxyl group-containing compound such as ethylene glycol, propylene glycol, butanediol, pentandiol, hexanediol, octanediol, and nonanediol, and diethylene carbonate, dipropylene carbonate, and the like. And so on.

Examples of the aromatic polyol include bisphenol A, bisphenol F, phenol novolac, cresol novolac and the like.

Examples of the alicyclic polyol include cyclohexanediol, methylcyclohexanediol, isophoronediol, dicyclohexylmethanediol, and dimethyldicyclohexylmethanediol.

Examples of the aliphatic polyol include ethylene glycol, propylene glycol, butanediol, pentanediol, and hexanediol.

Examples of the polyester polyol include a polymer obtained by dehydration condensation of a polybasic acid and a polyhydric alcohol, and a polymer obtained by ring-opening polymerization of lactones such as ε-caprolactone and α-methyl-ε-caprolactone. Examples thereof include a condensate of hydroxycarboxylic acid and the above-mentioned polyhydric alcohol.

Specific examples of the polybasic acid include adipic acid, azelaic acid, sebacic acid, terephthalic acid, isophthalic acid, and succinic acid. Specific examples of the polyhydric alcohol include bisphenol A, ethylene glycol, 1,2-propylene glycol, 1,4-butanediol, diethylene glycol, 1,6-hexane glycol, neopentyl glycol and the like. ..

Specific examples of the hydroxycarboxylic acid include castor oil, a reaction product of castor oil and ethylene glycol, and the like.

Examples of the polymer polyol include polybutadiene, which is a polymer obtained by graft-polymerizing an ethylenically unsaturated compound such as acrylonitrile, styrene, methyl acrylate, and methacrylate with an aromatic polyol, an alicyclic polyol, an aliphatic polyol, a polyester polyol, or the like. Examples thereof include polyols, modified polyols of polyhydric alcohols, and hydrogenated products thereof.

Examples of the modified polyol of the polyhydric alcohol include those modified by reacting the raw material polyhydric alcohol with an alkylene oxide.

Polyhydric alcohols include, for example, trihydric alcohols such as glycerin and trimethylolpropane; pentaerythritol, sorbitol, mannitol, sorbitan, diglycerin, dipentaerythritol and the like, sucrose, glucose, mannose, fructose, methylglucoside and Tetra-octavalent alcohols such as derivatives thereof; phenol, fluoroglycerin, cresol, pyrogallol, catechol, hydroquinone, bisphenol A, bisphenol F, bisphenol S, 1-hydroxynaphthalene, 1,3,6,8-tetrahydroxynaphthalene. , Anthrol, 1,4,5,8-tetrahydroxyanthracene, 1-hydroxypyrene and other phenol polybutadiene polyols; castor oil polyol; (co) polymer of hydroxyalkyl (meth) acrylate and polyfunctional (eg, polyvinyl alcohol) such as polyvinyl alcohol. Examples thereof include polyols having 2 to 100 functional groups and a condensate of phenol and formaldehyde (Novolak).

The method for modifying the polyhydric alcohol is not particularly limited, but a method for adding an alkylene oxide (hereinafter abbreviated as AO) is preferably used.

As the polyether polyol, for example, at least one of alkylene oxides such as ethylene oxide, propylene oxide and tetrahydrofuran is subjected to ring-opening polymerization in the presence of at least one of low molecular weight active hydrogen compounds having two or more active hydrogens. Examples thereof include the obtained polymer.

Examples of the low molecular weight active hydrogen compound having two or more active hydrogens include diols such as bisphenol A, ethylene glycol, propylene glycol, butylene glycol and 1,6-hexanediol, and triols such as glycerin and trimethylolpropane. , Ethylenediamine, amines such as butylene diamine and the like. As the polyol used in the present invention, it is preferable to use a polyester polyol or a polyether polyol because it has a large effect of reducing the total calorific value when burned.

Next, the compounding ratio of the main agent and the curing agent of the urethane resin will be described.

In the present invention, the index is defined by (equivalent number of polyisocyanate) × 100 ÷ (equivalent number of polyol + equivalent number of water). Here, the equivalent number of the polyol compound is represented by [hydroxyl value of the polyol compound (mgKOH / g)] × [weight of the polyol compound (g)] ÷ [molecular weight of potassium hydroxide]. The equivalent number of the polyisocyanate is represented by [molecular weight of polyisocyanate group] × 100 ÷ [weight% of isocyanate group]. The equivalent number of water is expressed by [weight of water (g)] × 2 ÷ [molecular weight of water].

The isocyanate index represents the equivalent ratio of the isocyanate groups of the polyisocyanate to the hydroxyl groups of the polyol as a percentage, and when the value exceeds 100, it means that the isocyanate groups are more than the hydroxyl groups.

The range of the isocyanate index of the urethane resin used in the present invention is preferably in the range of 120 to 700, more preferably in the range of 200 to 600, and even more preferably in the range of 300 to 500. When the equivalent ratio is 700 or less, foaming defects can be prevented, and when the equivalent ratio is 120 or more, good heat resistance can be obtained.
(C) Triadization catalyst The triadization catalyst reacts the isocyanate groups contained in polyisocyanate, which is the main component of the polyurethane resin, to triadize and promote the formation of isocyanurate rings. In order to promote the formation of isocyanurate rings, for example, tris (dimethylaminomethyl) phenol, 2,4-bis (dimethylaminomethyl) phenol, 2,4,6-tris (dialkylaminoalkyl) as trimerization catalysts. Nitrogen-containing aromatic compounds such as hexahydro-S-triazine; carboxylic acid alkali metal salts such as potassium acetate and potassium octylate; tertiary ammonium salts such as trimethylammonium salt, triethylammonium salt and triphenylammonium salt; tetramethylammonium salt , Quaternary ammonium salts such as tetraethylammonium and tetraphenylammonium salts can be used.

The amount of the trimerization catalyst used in the in-situ foaming system is preferably in the range of 0.1 parts by weight to 10 parts by weight, preferably 0.1 parts by weight to 8 parts by weight, based on 100 parts by weight of the urethane resin. The range is more preferably in the range of 0.1 parts by weight to 6 parts by weight, more preferably in the range of 0.4 parts by weight to 3.0 parts by weight. When it is 0.1 part by weight or more, there is no problem that the triglyceride of isocyanate is inhibited, and when it is 10 parts by weight or less, an appropriate foaming rate can be maintained and it is easy to handle.
(D) Foaming agent The foaming agent used in the in-situ foaming system promotes the foaming of urethane resin.

Examples of the foaming agent include water, propane, butane, pentane, hexane, heptane, cyclopropane, cyclobutane, cyclopentane, cyclohexane, cycloheptane and other low-boiling hydrocarbons, dichloroethane, propyl chloride, isopropyl chloride and butyl chloride. , Isobutyl chloride, pentyl chloride, chlorinated aliphatic hydrocarbon compounds such as isopentyl chloride,
Fluorine such as trichloromonofluoromethane, trichlorotrifluoroetan, CHF ₃ , CH ₂ F ₂ , CH ₃ F, for example hydrofluoroolefins (HFOs) such as trans-1-chloro-3,3,3-trifluoropropene. Compound,
Hydrochlorofluorocarbon compounds such as dichloromonofluoroethane, (eg, HCFC141b (1,1-dichloro-1-fluoroethane), HCFC22 (chlorodifluoromethane), HCFC142b (1-chloro-1,1-difluoroethane)).
Hydrofluorocarbon compounds such as HFC-245fa (1,1,1,3,3-pentafluoropropane), HFC-365mfc (1,1,1,3,3-pentafluorobutane),
An ether compound such as diisopropyl ether, or an organic physical foaming agent such as a mixture of these compounds,
Examples thereof include inorganic physical foaming agents such as nitrogen gas, oxygen gas, argon gas, and carbon dioxide gas.

The range of the foaming agent is preferably in the range of 0.1 parts by weight to 30 parts by weight with respect to 100 parts by weight of the urethane resin. The foaming agent is more preferably in the range of 0.1 parts by weight to 18 parts by weight, further preferably in the range of 0.5 parts by weight to 18 parts by weight, with respect to 100 parts by weight of the urethane resin. Most preferably, it is in the range of parts by weight to 15 parts by weight.

When the range of the foaming agent is 0.1 parts by weight or more, foaming is promoted and the density of the obtained molded product can be reduced, and when it is 30 parts by weight or less, the foam does not foam and the foam is formed. It can be prevented from not being done.
(E) Defoaming agent Examples of the defoaming agent include a polyoxyalkylene defoaming agent such as polyoxyalkylene alkyl ether and a surfactant such as a silicone defoaming agent such as organopolysiloxane.

The amount of the foam stabilizer used for the urethane resin cured by the chemical reaction is appropriately set depending on the urethane resin cured by the chemical reaction used. For example, for example, with respect to 100 parts by weight of the urethane resin. It is preferably in the range of 0.1 parts by weight to 10 parts by weight.

One or more of the quantifying catalyst, the foaming agent and the foam regulating agent can be used.
(F) Additives Additives are selected from red phosphorus, phosphate esters, phosphate-containing flame retardants, bromine-containing flame retardants, boron-containing flame retardants, antimony-containing flame retardants, metal hydroxides, and acicular fillers. Includes at least one.

In this case, as a preferable combination of the additives to be used, for example, any one of the following (a) to (n) can be mentioned.
(a) Red phosphorus and phosphate ester
(b) Flame retardant containing red phosphorus and phosphate
(c) Flame retardant containing red phosphorus and bromine
(d) Flame retardant containing red phosphorus and boron
(e) Flame retardant containing red phosphorus and antimony
(f) Red phosphorus and metal hydroxides
(g) Red phosphorus and needle-like filler
(H) Flame retardant containing red phosphorus, phosphate ester and phosphate
(i) Red phosphorus, phosphate ester, phosphate-containing flame retardant, and bromine-containing flame retardant
(j) Flame retardant containing red phosphorus, phosphate ester and boron
(k) Red phosphorus, phosphate ester and acicular filler
(l) Red phosphorus, phosphate-containing flame retardant and bromine-containing flame retardant
(m) Red phosphorus, phosphate-containing flame retardant and boron-containing flame retardant
(n) Red phosphorus, bromine-containing flame retardant and boron-containing flame retardant
(o) Red phosphorus, phosphate ester, phosphate-containing flame retardant and bromine-containing flame retardant
(p) Red phosphorus, phosphate ester, phosphate-containing flame retardant, bromine-containing flame retardant and boron-containing flame retardant
(q) Needle-shaped filler added to the above (l) to (p)
(r) With red phosphorus; with phosphate ester and phosphate-containing flame retardants; at least one selected from boron-containing flame retardants, antimony-containing flame retardants, metal hydroxides, and acicular fillers.
(s) With red phosphorus; with one or two selected from phosphate esters, phosphate-containing flame retardants, and bromine-containing flame retardants; boron-containing flame retardants, antimony-containing flame retardants, metal hydroxides, and needles. At least one selected from the state fillers
(t) With red phosphorus; with phosphate ester, phosphate-containing flame retardant, and bromine-containing flame retardant; at least one selected from boron-containing flame retardant, antimony-containing flame retardant, metal hydroxide, and acicular filler. The red phosphorus used in the present invention is not limited, and a commercially available product can be appropriately selected and used.

The amount of red phosphorus added is preferably in the range of 3.0 parts by weight to 18 parts by weight with respect to 100 parts by weight of the urethane resin. When the range of red phosphorus is 3.0 parts by weight or more, the self-extinguishing property of the flame-retardant urethane resin composition is maintained, and when it is 18 parts by weight or less, foaming of the flame-retardant urethane resin composition is inhibited. Not done. The phosphoric acid ester used in the present invention is not particularly limited, but it is preferable to use a monophosphate ester, a condensed phosphoric acid ester, or the like.

The monophosphoric acid ester is not particularly limited, but for example, trimethyl phosphate, triethyl phosphate, tributyl phosphate, tri (2-ethylhexyl) phosphate, tributoxyethyl phosphate, triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, etc. Tris (isopropylphenyl) phosphate, tris (phenylphenyl) phosphate, trinaphthyl phosphate, cresyldiphenyl phosphate, xylenyl diphenyl phosphate, diphenyl (2-ethylhexyl) phosphate, di (isopropylphenyl) phenyl phosphate, monoisodecyl phosphate, 2-Acryloyloxyethyl acid phosphate, 2-methacryloyloxyethyl acid phosphate, diphenyl-2-acryloyloxyethyl phosphate, diphenyl-2-methacryloyloxyethyl phosphate, melamine phosphate, dimelamine phosphate, melamine pyrophosphate, triphenylphosphine oxide, Examples thereof include tricresylphosphine oxide, diphenyl methanephosphonate, diethyl phenylphosphonate, resilsinol bis (diphenyl phosphate), bisphenol A bis (diphenyl phosphate), phosphaphenanthrene, tris (β-chloropropyl) phosphate and the like.

The condensed phosphoric acid ester is not particularly limited, but for example, trialkylpolyphosphate, resorcinolpolyphenyl phosphate, resorcinolpoly (di-2,6-kisilyl) phosphate (manufactured by Daihachi Chemical Industry Co., Ltd., trade name PX-200). ), Hydroquinone poly (2,6-xylyl) phosphate, and condensed phosphoric acid esters such as condensates thereof.

Examples of commercially available condensed phosphate esters include resorcinol polyphenyl phosphate (trade name CR-733S), bisphenol A polycresyl phosphate (trade name CR-741), aromatic condensed phosphate ester (trade name CR747), and resorcinol. Examples thereof include polyphenyl phosphate (manufactured by ADEKA, trade name Adecastab PFR), bisphenol A polycresyl phosphate (trade names FP-600, FP-700) and the like.

Among the above, it is preferable to use a monophosphate ester because it has a high effect of reducing the viscosity in the composition before curing and the effect of reducing the initial calorific value, and tris (β-chloropropyl) phosphate should be used. Is more preferable.

One type or two or more types of phosphoric acid esters can be used.

The amount of the phosphoric acid ester added is preferably in the range of 1.5 parts by weight to 52 parts by weight, and more preferably in the range of 1.5 parts by weight to 20 parts by weight with respect to 100 parts by weight of the urethane resin. It is more preferably in the range of 2.0 parts by weight to 15 parts by weight, and most preferably in the range of 2.0 parts by weight to 10 parts by weight.

When the range of the phosphoric acid ester is 1.5 parts by weight or more, it is possible to prevent the dense residue formed by the heat of the fire from cracking in the molded product made of the flame-retardant urethane resin composition, and when it is 52 parts by weight or less. The foaming of the flame-retardant urethane resin composition is not inhibited.

The phosphate-containing flame retardant used in the present invention contains phosphoric acid.
The phosphoric acid used in the phosphate-containing flame retardant is not particularly limited, and examples thereof include monophosphoric acid, pyrophosphoric acid, polyphosphoric acid, and various phosphoric acids such as combinations thereof.

The phosphate-containing flame retardant is, for example, phosphorus composed of a salt of various phosphoric acids and at least one metal or compound selected from the metals of Group IA to IVB of the Periodic Table, ammonia, aliphatic amines, and aromatic amines. Phosphate can be mentioned. Examples of the metals of Group IA to IVB of the Periodic Table include lithium, sodium, calcium, barium, iron (II), iron (III), and aluminum.

Examples of the aliphatic amine include methylamine, ethylamine, diethylamine, triethylamine, ethylenediamine, piperazine and the like.

Further, examples of the aromatic amine include pyridine, triazine, melamine, ammonium and the like.

The above-mentioned phosphate-containing flame retardant may be subjected to a known water resistance improving treatment such as a silane coupling agent treatment or coating with a melamine resin, or a known foaming aid such as melamine or pentaerythritol may be added. You may.

Specific examples of the phosphate-containing flame retardant include monophosphate, pyrophosphate, polyphosphate and the like.

The monophosphate is not particularly limited, but for example, ammonium salts such as ammonium phosphate, ammonium dihydrogen phosphate, and diammonium hydrogen phosphate, sodium phosphate, disodium phosphate, trisodium phosphate, and phosphite. -Sodium, disodium phosphite, sodium salts such as sodium hypophosphite, monopotassium phosphate, dipotassium phosphate, trisodium phosphate, monopotassium phosphite, dipotassium phosphite, hypophosphite Potassium salts such as potassium, dilithium phosphate, trilithium phosphate, trilithium phosphate, dilithium phosphite, lithium salts such as lithium hypophosphite, barium dihydrogen phosphate, phosphorus Barium salts such as barium hydrogen phosphate, tribarium phosphate, barium hypophosphite, magnesium monohydrogen phosphate, magnesium hydrogen phosphate, trimagnesium phosphate, magnesium salts such as magnesium hypophosphite, calcium dihydrogen phosphate , Calcium hydrogen phosphate, trisodium phosphate, calcium hypophosphite and other calcium salts, zinc phosphate, zinc phosphite, zinc hypophosphate and other zinc salts and the like.

The polyphosphate is not particularly limited, and examples thereof include ammonium polyphosphate, piperazine polyphosphate, melamine polyphosphate, ammonium polyphosphate amide, and aluminum polyphosphate.

Among these, monophosphate is preferably used, and ammonium dihydrogen phosphate is more preferable, because the self-extinguishing property of the phosphate-containing flame retardant is improved.

One type or two or more types of phosphate-containing flame retardants can be used.

The amount of the phosphate-containing flame retardant used in the present invention is preferably in the range of 1.5 parts by weight to 52 parts by weight, preferably 1.5 parts by weight to 20 parts by weight, based on 100 parts by weight of the urethane resin. The range is more preferably in the range of parts, more preferably in the range of 2.0 parts by weight to 15 parts by weight, and most preferably in the range of 2.0 parts by weight to 10 parts by weight.

When the range of the phosphate-containing flame retardant is 1.5 parts by weight or more, the self-extinguishing property of the flame-retardant urethane resin composition is maintained, and when it is 52 parts by weight or less, the flame-retardant urethane resin composition Foaming is not inhibited.

The bromine-containing flame retardant used in the present invention is not particularly limited as long as it is a compound containing bromine in its molecular structure, and examples thereof include aromatic brominated compounds.

Specific examples of the aromatic brominated compound include hexabromobenzene, pentabromotoluene, hexabromobiphenyl, decabromobiphenyl, hexabromocyclodecane, decabromodiphenyl ether, octabromodiphenyl ether, hexabromodiphenyl ether, and bis (pentabromo). Huenoxy) Ethane, ethylene-bis (tetrabromophthalimide), tetrabromobisphenol A and other monomeric organobromine compounds; polycarbonate oligomers produced from brominated bisphenol A as raw materials, copolymers of polycarbonate oligomers and bisphenol A, etc. Brobromine polycarbonate; diepoxy compounds produced by the reaction of brominated bisphenol A with epichlorohydrin, brominated epoxy compounds such as monoepoxy compounds obtained by the reaction of brominated phenols with epichlorohydrin; poly (brominated benzyl acrylate). Brominated polyphenylene ether; condensates of brominated bisphenol A, cyanur chloride and brominated phenol; brominated polystyrene such as brominated (polystyrene), poly (brominated styrene), crosslinked brominated polystyrene; crosslinked or non-crosslinked brominated Examples thereof include halogenated bromine compound polymers such as poly (-methylstyrene).

From the viewpoint of controlling the calorific value at the initial stage of combustion, brominated polystyrene, hexabromobenzene and the like are preferable, and hexabromobenzene is more preferable.

One or more kinds of bromine-containing flame retardants can be used.

The amount of the bromine-containing flame retardant used in the present invention is preferably in the range of 1.5 parts by weight to 52 parts by weight, preferably 1.5 parts by weight to 20 parts by weight, based on 100 parts by weight of the urethane resin. It is more preferably in the range of 2.0 parts by weight to 15 parts by weight, and most preferably in the range of 2.0 parts by weight to 10 parts by weight.

When the range of the bromine-containing flame retardant is 0.1 parts by weight or more, the self-extinguishing property of the flame-retardant urethane resin composition is maintained, and when it is 52 parts by weight or less, the flame-retardant urethane resin composition is foamed. Is not hindered.

Examples of the boron-containing flame retardant used in the present invention include borax, boron oxide, boric acid, borate and the like.

Examples of the boron oxide include diboron trioxide, boron trioxide, diboron dioxide, tetraboron trioxide, tetraboron pentoxide and the like.

Examples of the borate include alkali metals, alkaline earth metals, elements of Groups 4, 12, and 13 of the periodic table, and ammonium borates.

Specifically, alkali metal borate salts such as lithium borate, sodium borate, potassium borate and cesium borate, alkaline earth metal borate such as magnesium borate, calcium borate and barium borate, borate Examples thereof include zirconium acid, zinc borate, aluminum borate, and ammonium borate.

The boron-containing flame retardant used in the present invention is preferably borate, more preferably zinc borate.

As the boron-containing flame retardant, one kind or two or more kinds can be used.

The amount of the boron-containing flame retardant used in the present invention is preferably in the range of 1.5 parts by weight to 52 parts by weight, preferably 1.5 parts by weight to 20 parts by weight, based on 100 parts by weight of the urethane resin. It is more preferably in the range of 2.0 parts by weight to 15 parts by weight, and most preferably in the range of 2.0 parts by weight to 10 parts by weight.

When the range of the boron-containing flame retardant is 1.5 parts by weight or more, the self-extinguishing property of the flame-retardant urethane resin composition is maintained, and when it is 52 parts by weight or less, the flame-retardant urethane resin composition is foamed. Is not hindered.

Examples of the antimony-containing flame retardant used in the present invention include antimony oxide, antimonate, and pyroantimonate.

Examples of antimony oxide include antimony trioxide and antimony pentoxide.

Examples of the antimonate include sodium antimonate, potassium antimonate and the like.

Examples of the pyroantimonate include sodium pyroantimonate, potassium pyroantimonate and the like.

The antimony-containing flame retardant used in the present invention is preferably antimony oxide.

As the antimony-containing flame retardant, one kind or two or more kinds can be used.

The amount of the antimony-containing flame retardant added is preferably in the range of 1.5 parts by weight to 52 parts by weight, and preferably in the range of 1.5 parts by weight to 20 parts by weight with respect to 100 parts by weight of the urethane resin. It is more preferably in the range of 2.0 parts by weight to 15 parts by weight, and most preferably in the range of 2.0 parts by weight to 10 parts by weight.

When the range of the antimony-containing flame retardant is 1.5 parts by weight or more, the self-extinguishing property of the flame-retardant urethane resin composition is maintained, and when it is 52 parts by weight or less, the flame-retardant urethane resin composition is foamed. Is not hindered.

Examples of the metal hydroxide used in the present invention include magnesium hydroxide, calcium hydroxide, aluminum hydroxide, iron hydroxide, nickel hydroxide, zirconium hydroxide, titanium hydroxide, zinc hydroxide, and copper hydroxide. , Vanadium hydroxide, tin hydroxide and the like.

As the metal hydroxide, one kind or two or more kinds can be used.

The amount of the metal hydroxide added is preferably in the range of 1.5 parts by weight to 52 parts by weight, and preferably in the range of 1.5 parts by weight to 20 parts by weight with respect to 100 parts by weight of the urethane resin. It is more preferably in the range of 2.0 parts by weight to 15 parts by weight, and most preferably in the range of 2.0 parts by weight to 10 parts by weight.

When the range of the metal hydroxide is 1.5 parts by weight or more, the self-extinguishing property of the flame-retardant urethane resin composition is maintained, and when it is 52 parts by weight or less, the flame-retardant urethane resin composition is foamed. Is not hindered.

The needle-shaped filler used in the present invention includes, for example, potassium titanate whisker, aluminum borate whisker, magnesium-containing whisker, silicon-containing whisker, wollastonite, sepiolite, zonolite, elestadite, boehmite, rod-shaped hydroxyapatite, and glass fiber. , Asbestos fiber, carbon fiber, graphite fiber, metal fiber, slag fiber, gypsum fiber, silica fiber, alumina fiber, silica / alumina fiber, zirconia fiber, boron nitride fiber, boron fiber, stainless steel fiber and the like.

The range of the aspect ratio (length / diameter) of the needle-shaped filler used in the present invention is preferably in the range of 5 to 50, and more preferably in the range of 10 to 40.

As the needle-shaped filler, one kind or two or more kinds can be used.

The amount of the needle-shaped filler used in the present invention is not particularly limited, but is preferably in the range of 3.0 to 30 parts by weight, preferably 3.0 to 20 parts by weight, based on 100 parts by weight of the urethane resin. The range is more preferably in the range of 3.0 to 18 parts by weight, more preferably in the range of 6.0 to 18 parts by weight.

When the range of the needle-shaped filler is 3.0 parts by weight or more, the shape of the flame-retardant heat insulating material composition according to the present invention after combustion is maintained, and when it is 30 parts by weight or less, the difficulty according to the present invention is maintained. Foaming of the combustion insulation composition is not inhibited.

The amount of the additive used in the present invention is preferably in the range of 4.5 parts by weight to 70 parts by weight, preferably in the range of 4.5 parts by weight to 40 parts by weight with respect to 100 parts by weight of the urethane resin. Is more preferably in the range of 4.5 parts by weight to 30 parts by weight, and most preferably in the range of 4.5 parts by weight to 20 parts by weight.

When the range of the additive is 4.5 parts by weight or more, the molded product made of the flame-retardant urethane resin composition can prevent the dense residue formed by the heat of the fire from cracking, and when it is 70 parts by weight or less. Does not inhibit the foaming of the flame-retardant urethane resin composition.

In a preferred embodiment, the flame-retardant urethane resin composition is (C) based on 100 parts by weight of the polyurethane resin composition composed of (A) polyisocyanate in the first liquid and (B) polyol in the second liquid. ) Is in the range of 0.1 to 10 parts by weight, the foaming agent of (D) is in the range of 0.1 to 30 parts by weight, and the foam stabilizer of (E) is in the range of 0.1 parts by weight. The additive in (F) is in the range of 4.5 parts by weight to 70 parts by weight, the red phosphorus is in the range of 3 parts by weight to 18 parts by weight, and the red phosphorus is in the range of 10 parts by weight. The additives to be excluded are in the range of 1.5 parts by weight to 52 parts by weight.
(G) Other Ingredients The in-situ foaming system may further comprise a catalyst other than the trimerization catalyst described above, such as triethylamine, N-methylmorpholinbis (2-dimethylaminoethyl) ether, etc. N, N, N', N ", N" -pentamethyldiethylenetriamine, N, N, N'-trimethylaminoethyl-ethanolamine, bis (2-dimethylaminoethyl) ether, N-methyl, N'-dimethylamino Examples thereof include ethyl piperazine and nitrogen atom-containing catalysts such as imidazole compounds in which the secondary amine functional group in the imidazole ring is replaced with a cyanoethyl group.

The amount of such a catalyst added is the total amount of the trimerization catalyst and the catalyst other than the trimerization catalyst, and is preferably in the range of 0.1 parts by weight to 10 parts by weight with respect to 100 parts by weight of the urethane resin. It is more preferably in the range of 1 part by weight to 8 parts, further preferably in the range of 0.1 parts by weight to 6 parts by weight, and preferably in the range of 0.1 parts by weight to 3.0 parts by weight. Most preferred.

When it is 0.1 part by weight or more, there is no problem that the formation of urethane bond is hindered, and when it is 10 parts by weight or less, an appropriate foaming rate can be maintained and it is easy to handle.

The in-situ foaming system may further contain an anti-settling agent. The sedimentation inhibitor is not particularly limited, and examples thereof include carbon black, fine silica powder, hydrogenated castor oil wax, fatty acid amide wax, organic clay, and polyethylene oxide.

The in-situ foaming system is used as an antioxidant, a heat stabilizer, a metal damage inhibitor, an antistatic agent, a stabilizer, if necessary, as long as the object of the present invention is not impaired. , Crosslinking agents, lubricants, softeners, pigments, auxiliary components such as tackifier resins, and antistatic agents such as polybutene and petroleum resins.

Next, a method of forming a fireproof structure of the compartment of the second embodiment will be described. First, as shown in FIG. 10A, the hollow portion 14 is filled with the expandable closing member 24 so as to extend between the two wall members 13 of the hollow wall 12 over the hollow portion 14. Next, as shown in FIG. 10 (B), the tubular body 30 is inserted into the through hole 15, and as shown in FIG. 10 (C), the hollow wall 12 is filled with the tubular body 30 and the inflatable closing member 24. The refractory filler 23 is filled between the two.

Although the present invention has been described above with respect to the second embodiment, the present invention is not limited to the above-mentioned second embodiment, and various modifications such as the following are possible as long as the gist of the present invention is not deviated.
-The fireproof cover 16 used in the first embodiment may be further used in addition to the second embodiment. In this case, after the expandable closing member 24 is provided between the two wall members 13, the fireproof cover 16 is arranged in the through hole 15.

Although the embodiments of the present invention have been specifically described above, the present invention is not limited to the above-described embodiments, and various modifications based on the technical idea of the present invention are possible.

For example, the configurations, methods, processes, shapes, materials, numerical values, etc. given in the above-described embodiments are merely examples, and different configurations, methods, processes, shapes, materials, numerical values, etc. may be used as necessary. May be good.

In addition, the configurations, methods, processes, shapes, materials, numerical values, and the like of the above-described embodiments can be combined with each other without departing from the gist of the present invention.
The present invention can also adopt the following configurations.
[1] A fireproof structure of a building compartment having through holes through which one or more pipes are inserted.
A compartment consisting of a wall having two wall members with a hollow portion formed between them,
The refractory cover is provided with a refractory cover installed in the through hole so as to extend between the two wall members across the hollow portion.
A tubular body with thermal expansion and
A fireproof structure of a compartment having a flange portion protruding from one end of the main body portion toward the outer periphery in the axial direction of the main body portion, and the flange portion is arranged outside the wall.
[2] With one or more tubes,
The fireproof structure of a compartment according to [1], further comprising a fireproof filler that is filled between the tube and the fireproof cover.
[3] The flange portion is a first flange portion, and the first flange portion is arranged outside one wall member of the wall.
The refractory cover has a second flange portion that projects from an end opposite to one end of the main body portion toward the axial outer circumference of the main body portion, and the second flange portion is the other of the wall portion. The fireproof structure of the compartment according to [1] or [2], which is arranged outside the wall member.
[4] The method for forming a fireproof structure of a building compartment according to any one of [1] to [3].
Inserting the fireproof cover into the through hole,
Fire protection of a compartment comprising installing the fireproof cover in the through hole and providing the flange portion on the outside of the wall so as to extend between the two wall members of the wall across the hollow portion. How to form the structure.
[5] Providing the flange portion on the outside of the wall
A flange portion provided in advance before inserting the fireproof cover into the through hole is arranged outside the wall, or the fireproof cover is inserted into the through hole from one of the fireproof compartments to prevent the fire. The method for forming a fireproof structure according to [4], wherein a flange portion is formed after one end of the sex cover reaches the other fireproof section.
[6] A fireproof structure of a building compartment having through holes through which one or more pipes are inserted.
A building compartment consisting of a wall having two wall members with a hollow portion formed between them,
A fireproof structure of a compartment including an inflatable closing member provided so as to extend between the two wall members across the hollow portion.
[7] With one or more tubes,
The fireproof structure of a compartment according to [6], further comprising a fire resistant filler to be filled between the pipe body and the expandable closing member.
[8] The compartment according to [6] or [7], wherein the expandable closing member comprises a foaming and curing material, an expanded airtight bag, or a bag containing a foaming and curing material. Fireproof structure.
[9] The method for forming a fireproof structure of a compartment according to any one of [6] to [8].
Filling the hollow portion with an inflatable closing member so as to extend between the two wall members across the hollow portion.
A method of forming a fireproof structure of a compartment composed of.
[10] Inserting the pipe body into the through hole, and filling a fire-resistant filler between the pipe body and the wall filled with the expandable closing member.
The method for forming a fireproof structure of a compartment according to [8] or [9], further comprising.

1 ... device, 10 ... fireproof structure, 11 ... compartment, 12 ... hollow wall, 13 ... two wall members, 14 ... hollow part, 15 ... through hole, 16 ... fireproof cover, 17 ... main body part, 17a ... one end of the main body, 17b ... the other end of the main body, 18 ... flange, 18a ... the first flange as the flange, 18b ... the second flange as the flange, 23 ... the refractory filler, 24 ... Inflatable closing member, 30 ... Tube, A, B ... Fire protection compartment.

Claims (9)

A fireproof structure for a building compartment with through holes through which one or more pipes can be inserted.
A compartment consisting of a wall having two wall members with a hollow portion formed between them,
With one or more tubes inserted through the through hole,
The refractory cover is provided with a refractory cover installed in the through hole so as to extend between the two wall members over the hollow portion.
A tubular body with thermal expansion and
It has a flange portion that protrudes from one end of the main body portion toward the outer periphery in the axial direction of the main body portion, and the flange portion is arranged on the outside of the wall.
A fireproof structure of a compartment in which a fireproof filler is continuously filled between the pipe body and the fireproof cover over the entire length of the hollow portion along the length direction of the fireproof cover. .. The flange portion is a first flange portion, and the first flange portion is arranged outside one wall member of the wall.
The refractory cover has a second flange portion that projects from an end opposite to one end of the main body portion toward the axial outer circumference of the main body portion, and the second flange portion is the other of the wall portion. The fireproof structure of the compartment according to claim 1, which is arranged outside the wall member. The method for forming a fireproof structure of a building compartment according to claim 1 or 2.
Inserting the fireproof cover into the through hole,
Installing the refractory cover in the through hole so as to extend between the two wall members of the wall across the hollow portion.
To provide the flange portion on the outside of the wall,
A method for forming a fireproof structure of a compartment, comprising inserting the pipe body into the through hole and filling a fireproof filler between the pipe body and the fireproof cover. Providing the flange portion on the outside of the wall
A flange portion provided in advance before inserting the fireproof cover into the through hole is arranged outside the wall, or the fireproof cover is inserted into the through hole from one of the fireproof compartments to prevent the fire. The method for forming a fireproof structure according to claim 3, wherein a flange portion is formed after one end of the sex cover reaches the other fireproof section. A fireproof structure for a building compartment with through holes through which one or more pipes can be inserted.
A building compartment consisting of a wall having two wall members with a hollow portion formed between them,
With one or more tubes inserted through the through hole,
An inflatable closing member is provided between the two wall members and arranged so as to be located around the through hole, and the inflatable closing member holds the hollow portion in the length direction of the tubular body. Fire protection structure of the compartment, arranged to block. The fireproof structure of a compartment according to claim 5, further comprising a fireproof filler that is filled between the tube and the expandable closing member. The fireproof structure of a compartment according to claim 5 or 6, wherein the expandable closing member comprises a foaming and curing material, an expanded airtight bag, or a bag containing a foaming and curing material. The method for forming a fireproof structure of a compartment according to any one of claims 5 to 7.
Filling the hollow portion with an inflatable closing member so as to extend between the two wall members across the hollow portion.
A method of forming a fireproof structure of a compartment composed of. 7. To claim 7 or 8, further comprising inserting the tubular body into the through hole and filling a refractory filler between the tubular body and the wall filled with the expandable closing member. A method for forming a fireproof structure of the described compartment.