JP2006249925A - Fire-resistant covering and its installation structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire-resistant covering easy to be fitted and its fitting structure. <P>SOLUTION: It is a fire-resistant covering 1 comprising a fire-resistant covering body 2 with properties to expand when heated and an independent form retainer 3 laid on top of the other. The fire-resistant covering body 2 is flexible, and consists of a fire-resistant non-vulcanized rubber composite containing non-vulcanized rubber, phosphorus compound, neutralized graphite with thermal expansion properties, and inorganic filler. The inorganic filler contains calcium or magnesium carbonate. In the rubber composite, the total of phosphorus compound and neutralized thermo-expanding graphite is in a range of a 20 to 200 parts weight, and the inorganic filler is in a range of a 50 to 500 parts weight, relative to 100 parts weight of non-vulcanized rubber, and the weight ratio of the neutralized thermo-expanding graphite to the phosphorus compound (thermo-expanding graphite to phosphide) is in the range of 9:1 to 1:9. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fireproof coating material excellent in workability.

  Conventionally, in steel structures, when applying fireproof coatings to steel frames such as beams and columns, asbestos, rock wool, calcium silicate, etc. are used as the main material and molded plates are used as adhesives and A method of pasting with a nail or the like has been implemented. However, since the fireproof coating material is a hard molded plate, it is difficult to cover the steel surface and bent parts, and cut according to the shape and dimensions of the steel frame. However, a special cutting tool such as a diamond cutter is required, and a large amount of dust is generated at the time of cutting.

  In order to solve the problem at the time of construction of the fireproof coating material using the molded plate, an irregular fireproof coating material having flexibility and flexibility is disclosed in Japanese Examined Patent Publication Nos. Sho 62-156459 and Japanese Patent Publication No. 4-37215. It is described in the Gazette. The fireproof coating material described in Japanese Examined Patent Publication No. Sho 62-156659 uses a felt material formed with inorganic fibers as a main material, and the latter fireproof coating material described in Japanese Patent Publication No. 4-37215 is made of inorganic fibers. It is a wet fiber felt material impregnated with colloidal silica as a main material, which is attached to the steel surface and dried and hardened to form a fireproof coating layer.

  However, the construction of the conventional fireproof coating material described in the above publication is a sheet-like material wrapped around a steel frame and fixed while holding it down, so workability at the time of construction is poor. Since this is a work, there is a problem that the work is particularly difficult. In addition, since the conventional fireproof coating material described in the above publication has flexibility, it is necessary to separately attach a support member when constructing an interior base material such as a gypsum board on this.

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a fire-resistant coating material that is easy to construct and a mounting structure thereof.

The invention according to claim 1 (the present invention) is a fire-resistant coating material obtained by polymerizing a heat-expandable fire-resistant coating material body that expands when heated, and a shape-retaining material having self-supporting properties.
The fireproof covering material body is provided with flexibility and flexibility, and includes a non-vulcanized rubber containing a phosphorus compound, neutralized thermally expandable graphite, and an inorganic filler. A vulcanized rubber composition,
The inorganic filler contains calcium carbonate or magnesium carbonate,
In the rubber composition, the total amount of the phosphorus compound and the neutralized thermally expandable graphite is in the range of 20 to 200 parts by weight with respect to 100 parts by weight of the non-vulcanized rubber. Is within the range of 50 to 500 parts by weight, and the weight ratio of the neutralized thermally expandable graphite and the phosphorus compound (thermally expandable black smoke: phosphorus compound) is 9: 1 to 1: 9 It is a fireproof covering material characterized by being in the range.

  The invention described in claim 2 is the fireproof covering material according to the present invention, wherein the shape maintaining material is formed of a thin metal plate.

  The invention according to claim 3 is the mounting structure of the fireproof coating material according to claim 1 or 2, wherein the fireproof coating material is attached to a steel frame such as a beam or a column with a gap.

  According to a fourth aspect of the present invention, the fireproof coating material is divided into a one-side coating material that covers the outer circumferential surface on one side of the cross section of the steel frame such as a beam or a column, and an other-side coating material that covers the outer circumferential surface on the other side of the cross section. The fire-resistant coating material according to any one of claims 1 to 3, wherein the one-side coating material and the other-side coating material are attached to a steel frame with their edges joined to each other. It is a mounting structure.

  In the present invention, as an indeterminate fireproof coating material body having flexibility and flexibility, for example, a felt material formed using inorganic fibers as a main material, or an inorganic fiber as a main material, Examples thereof include a wet fiber felt material impregnated with colloidal silica, which is attached to a shape-retaining material, dried and cured to form a fireproof coating layer, and the like.

  In the present invention, examples of the heat-expandable fireproof covering material body that expands upon heating include, for example, a resin composition containing heat-expandable graphite, meteorite, sodium silicate, sodium borate and the like. It is known by trade names such as Medjikat (made by Mitsui Metals Co., Ltd.), Dunseal (made by Furukawa Techno Material), Fire Barrier (made by Sumitomo 3M).

  In the present invention, the shape maintaining material having self-supporting property may be any material that does not melt at the heating temperature set according to the heating grade of the fire resistance test. Specifically, metal materials such as steel, stainless steel, aluminum, and copper, and FRP impregnated with nonflammable phenol resin are preferable. The thickness of the shape-retaining material is preferably 0.1 to 6.0 mm. If the thickness is smaller than 0.1 mm, the shape-retaining property is impaired, which is not preferable. Moreover, when it becomes larger than 6.0 mm, when using it with a process, workability will be impaired and it is unpreferable.

  The surface treatment of the shape-retaining material may be either present or not, but in the case of a steel material that easily rusts, it is preferable to perform a surface treatment such as hot dip galvanization. Alternatively, those subjected to a cosmetic treatment such as painting or film wrap may be preferable because they can be used as surface materials as they are.

  In the present invention, the refractory coating material is formed by polymerizing the refractory coating material main body and the shape-retaining material, and as a polymerization method thereof, it was later processed into a shape that was easily laminated and polymerized. Any of those obtained by pasting a fireproof covering material main body onto a shape retaining material that has been processed into a shape that can be easily applied in advance and polymerizing it later may be used. The polymerization state may be the entire surface or a part thereof. The polymerized material is preferably integrated by means such as adhesion, adhesion, tape fixing, pressure bonding, fusion, goby folding, etc. so that it does not fall off during construction.

  In the present invention, each of the refractory non-vulcanized rubber compositions has a total content of 20 of phosphorus compound and neutralized thermally expandable graphite with respect to 100 parts by weight of the non-vulcanized rubber. It is preferable that the weight ratio of the thermally expandable graphite: phosphorus compound, which is -200 parts by weight, the inorganic filler is 50-500 parts by weight, and is neutralized, is 9: 1 to 1: 9.

  The non-vulcanized rubber is not particularly limited, and examples thereof include natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, chloroprene rubber, nitrile rubber, butyl rubber, ethylene-propylene rubber, acrylic rubber, and urethane rubber. . These may be vulcanized after adding phosphorus compounds, graphite, and inorganic fillers.

In the present invention, the phosphorus compound is not particularly limited. For example, red phosphorus; various phosphate esters (triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, xylenyl diphenyl phosphate, etc.); Metal phosphates (sodium phosphate, potassium phosphate, magnesium phosphate, etc.); ammonium polyphosphates;
formula

The compound etc. which are represented by these are mentioned.

  In the formula, R1 and R3 each represent hydrogen, a linear or branched alkyl group having 1 to 16 carbon atoms, or an aryl group having 6 to 16 carbon atoms. R2 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 a carbon number Represents 6 to 16 aryloxy groups.

  Examples of the compound represented by the above formula include methylphosphonic acid, dimethyl methylphosphonate, ethylphosphonic acid, propylphosphonic acid, butylphosphonic acid, butylphosphonic acid, 2-methylpropylphosphonic acid, t-butylphosphonic acid, 3-dimethyl-butylphosphonic acid, octylphosphonic acid, phenylphosphonic acid, dioctylphenylphosphonate, dimethylphosphinic acid, methylethylphosphinic acid, methylpropylphosphinic acid, diethylphosphinic acid, dioctylphosphinic acid, phenylphosphinic acid, diethylphenylphosphinic acid , Diphenylphosphinic acid, bis (4-methoxyphenyl) phosphinic acid and the like.

  In the present invention, the phosphorus compound is preferably ammonium polyphosphate. Examples of the ammonium polyphosphates include ammonium polyphosphate, melamine-modified ammonium polyphosphate, and the like. Examples of commercially available products include “AP462” manufactured by Hoechst, “Sumisafe P” manufactured by Sumitomo Chemical Co., “Terrage C60” manufactured by Chisso.

  When commercially available red phosphorus is used as the phosphorus compound, it is preferable that the surface of the red phosphorus particles is coated with a resin from the viewpoint of safety such as moisture resistance and non-ignition during kneading. The above phosphorus compounds may be used alone or in combination of two or more.

  In the present invention, the thermally expandable graphite is a conventionally known substance, and powders such as natural graphite, pyrolytic graphite, pyrolytic graphite, and quiche graphite are mixed with an inorganic acid such as concentrated sulfuric acid, nitric acid, and selenic acid, concentrated nitric acid, Treated with a strong oxidant such as perchloric acid, perchlorate, permanganate, dichromate, or hydrogen peroxide to produce a graphite intercalation compound, while maintaining the carbon layered structure It is a crystalline compound.

  In the present invention, the thermally expandable graphite obtained by the acid treatment as described above is further neutralized with ammonia, an aliphatic lower amine, an alkali metal compound, an alkaline earth metal compound, or the like. Examples of the aliphatic lower amine include monomethylamine, dimethylamine, trimethylamine, ethylamine, propylamine, and butylamine. Examples of the alkali metal compound and alkaline earth metal compound include hydroxides such as potassium, sodium, calcium, barium, and magnesium, oxides, carbon salts, sulfates, and organic acid salts. Specific examples of the thermally expandable graphite thus neutralized include “CA60S” (manufactured by Nippon Kasei Co., Ltd.) and “GREP-EG” (manufactured by Tosoh Corporation).

  The particle size of the thermally expanded graphite used in the present invention is preferably 20 to 200 mesh. When the particle size is finer than 200 mesh, the degree of expansion of graphite is small and the desired fireproof heat insulating layer cannot be obtained. When the particle size is larger than 20 mesh, the degree of expansion is large, but when kneading with the resin, the dispersibility is poor and the physical properties are inevitably lowered.

  The inorganic filler used in the present invention is not particularly limited. For example, silica, diatomaceous earth, alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, ferrites, calcium hydroxide , Magnesium hydroxide, aluminum hydroxide, basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, barium carbonate, dawn night, hydrotalcite, calcium sulfate, barium sulfate, gypsum fiber, calcium silicate, talc, clay, Mica, montmorillonite, bentonite, activated clay, sepiolite, imogolite, sericite, glass fiber, glass beads, silica-based balloon, aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balloon Charcoal powder, various metal powders, potassium titanate, magnesium sulfate “MOS”, lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag fiber, fly ash, dehydration Examples include sludge.

  As the inorganic filler, a hydrous inorganic substance is preferable from the viewpoint of increasing heat resistance because it dehydrates during heating and has an endothermic effect. Specifically, it is preferable to use calcium hydroxide, magnesium hydroxide, aluminum hydroxide or the like. In addition, a metal salt or oxide of a metal belonging to Group II or Group III of the Periodic Table is preferable from the viewpoint of enhancing shape retention because it foams during combustion to form a foamed fired product. Specific examples include calcium carbonate and magnesium carbonate.

  The amount of each filler is 50 to 150 parts by weight of the phosphorus compound, 15 to 40 parts by weight of the neutralized thermally expandable graphite, and 30 to 500 parts by weight of the inorganic filler with respect to 100 parts by weight of the resin component. It is preferable to use within the range of parts. This is because if the amount of the phosphorus compound is less than 50 parts by weight, sufficient shape retention cannot be obtained, and if it exceeds 150 parts by weight, the mechanical properties decrease greatly. Further, if the heat-expandable graphite is less than 15 parts by weight, sufficient expandability cannot be obtained, and if it exceeds 40 parts by weight, the mechanical properties are similarly greatly deteriorated. If the inorganic filler is less than 30 parts by weight, sufficient fire resistance cannot be obtained, and if it exceeds 500 parts by weight, the mechanical properties are greatly deteriorated.

  In the present invention, by combining thermally expandable graphite and a phosphorus compound, scattering of thermally expandable graphite during combustion is suppressed, and shape retention is achieved. Therefore, if there is too much heat-expandable graphite, the graphite expanded at the time of combustion will be scattered and a sufficient expansion heat insulation layer will not be obtained at the time of heating. Conversely, if there is too much phosphorus compound, the heat insulation layer will not be sufficient and the desired effect Therefore, the weight ratio of the thermally expandable graphite to the phosphorus compound is preferably used as the thermally expandable graphite: phosphorus compound = 9: 1 to 1: 100.

In the present invention, steel, stainless steel, aluminum, copper or the like can be used as the metal plate material. The thickness is preferably 0.1 to 6.0 mm. If the thickness is smaller than 0.1 mm, the shape retention is impaired, which is not preferable. Moreover, when it becomes larger than 6.0 mm, when using it with a process, workability will be impaired and it is unpreferable. Further, the thickness of the metal plate material need not be uniform, and the pattern may be formed by changing the thickness in the cross section.
(Function)
The fire-resistant coating material according to the present invention is a fire-resistant non-vulcanized rubber composition in which a fire-resistant coating material main body contains a non-vulcanized rubber containing a phosphorus compound, neutralized thermally expandable graphite, and an inorganic filler. Since it is a thing, a fireproof coating material main body has remarkable fire resistance by forming an expansion | swelling heat insulation layer at the time of a heating, and also hold | maintaining the shape.

  In addition, the fireproof coating material according to the present invention is formed by polymerizing an amorphous fireproof coating material body having flexibility and flexibility and a shape retaining material having self-supporting properties. When attaching and fixing, the shape is maintained, and the construction becomes easy.

  The fire-resistant coating material according to the present invention is easy to process because the heat-expandable fire-resistant coating material body has flexibility and flexibility.

  In the fireproof covering material according to claim 2, since the shape maintaining material is formed of a thin metal plate material, it is resistant to heat and can be easily processed according to the shape of the steel frame to be coated.

  The mounting structure of the fireproof coating material according to claim 3 is such that the fireproof coating material is attached to a steel frame such as a beam or a column with a gap, so that the gap formed between the fireproof coating material and the steel frame is It functions as an air layer having heat insulation properties, and the thickness of the fireproof coating can be reduced accordingly.

  Further, in the fireproof coating material according to the present invention, the fireproof coating material body expands in the event of a fire, so the air layer having heat insulation properties is filled with the expanded fireproof coating material, ensuring the fireproof performance reliably. can do.

  The fireproof coating material mounting structure according to claim 4, wherein the fireproof coating material is a one-side coating material that covers one outer peripheral surface of a cross-section of a steel frame such as a beam or a column, and another side coating that covers the outer peripheral surface of the other cross-section. Since the one side covering material and the other side covering material are attached to the steel frame with their edges joined to each other, the attachment work can be easily performed.

  The fire-resistant coating material according to the present invention is a fire-resistant non-vulcanized rubber composition in which a fire-resistant coating material main body contains a non-vulcanized rubber containing a phosphorus compound, neutralized thermally expandable graphite, and an inorganic filler. Since it is a thing, a fireproof coating material main body has remarkable fire resistance by forming an expansion | swelling heat insulation layer at the time of a heating, and also hold | maintaining the shape.

  In addition, the fireproof coating material according to the present invention is formed by polymerizing an amorphous fireproof coating material body having flexibility and flexibility and a shape retaining material having self-supporting properties. When attaching and fixing, the shape is maintained, and the construction becomes easy.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 4 show an embodiment of the present invention, in which FIG. 1 is a fireproof coating, (A) is a perspective view, (B) is a cross-sectional view, and FIG. 2 is coated. FIG. 3 is a cross-sectional view showing the mounting structure of the fireproof coating material processed according to the shape of the steel frame, FIG. 4 is an explanatory view showing the manufacturing process of the fireproof coating material of FIG.

  Reference numeral 1 denotes a fireproof coating material. The fireproof coating material 1 shown in FIG. 1 is wound in a coil shape before processing, and the fireproof coating material 1 shown in FIG. 2 is adapted to the shape of the steel frame. It has been processed. The fireproof covering material 1 is formed by polymerizing an amorphous fireproof covering material body 2 having flexibility and flexibility, which will be described later, and a shape retaining material 3 having self-supporting properties. The shape retaining material 3 is formed of a thin metal plate made of a galvanized steel plate having a thickness of 0.2 mm.

  The fireproof coating material body 2 uses butyl rubber (Mooney viscosity (100 ° C.) = 47, unsaturation = 2.0 isobutylene / isoprene rubber) as non-vulcanized rubber, and ammonium phosphate ( Sumisafe P (manufactured by Sumitomo Chemical Co., Ltd.) and t-butylphosphonic acid (manufactured by Wako Pure Chemical Industries, Ltd.), CA60S (manufactured by Nippon Kasei Co., Ltd.), and inorganic filler as neutralized thermal expansive graphite As aluminum hydroxide (B703S, Nippon Light Metal Co., Ltd.) and magnesium hydroxide (Kisuma 5B, Kyowa Chemical Co., Ltd.) were used.

  Each content of the non-vulcanized rubber, the phosphorus compound, the neutralized thermally expandable graphite, and the refractory non-vulcanized rubber composition composed of the inorganic filler is 100 parts by weight of the non-vulcanized rubber. On the other hand, the total amount of phosphorus compound and neutralized thermally expandable graphite is 20 to 200 parts by weight, inorganic filler is 50 to 500 parts by weight, neutralized thermally expandable graphite: weight of phosphorus compound Each component was melt kneaded using a roll at a blending ratio of 9: 1 to 1: 9 to obtain a resin composition. This resin composition was continuously pressed at 140 ° C. to obtain a long sheet-shaped fireproof coating material body 2 having a thickness of 3 mm.

  The manufacturing method of the said fireproof covering material 1 is demonstrated with reference to FIG. The shape-retaining material 3 (galvanized steel sheet) wound in a coil shape is unwound, a primer is applied by a primer application coater P1, and dried in an oven P2. Next, an adhesive is applied to the primer-coated shape holding material 3 with an adhesive application coater P3, heat-treated at a predetermined temperature in an oven P4, and a sheet-like fireproof coating obtained in the above-described step with a laminating roll P5. Lamination polymerization is performed while adhering to the material body 2. The release paper 6 is bonded to the surface of the fireproof covering material 1 obtained as described above, and wound into a coil shape to obtain a coiled fireproof covering material 1 as shown in FIG. At this time, the fire-resistant coating material 1 that has been laminated and polymerized may be cut into a predetermined length by a cutting machine P6 to form a flat plate.

  Next, the long sheet-like fireproof covering material 1 obtained in the above process is processed into a predetermined shape by roll forming or the like according to the shape of the steel frame 4 described later. The steel frame 4 of the present embodiment is a lightweight C-type steel and forms a floor beam and a ceiling beam of a framework structure of a building unit (not shown). A plurality of building units are arranged in parallel to constitute a unit building, and has a box-shaped frame structure composed of four columns and ceiling beams and floor beams spanned between the columns. .

  As shown in FIG. 2, the processed fireproof covering material 1 is a long body that is bent in a substantially U-shaped cross-section with the shape-retaining material 3 facing outward, and one end of the U-shaped downward A mounting piece 11 bent at a right angle toward the head and a U-shaped mounting piece 12 with the other end bent 180 degrees are formed.

  As shown in FIG. 3, the bent fireproof covering material 1 is used to cover the steel frame 4. At this time, the tip piece 43 of the steel frame 4 is inserted into the U-shaped attachment piece 12. One mounting piece 11 is brought into contact with the bottom piece 41 of the steel frame 4 and fixed with screws 5 for mounting. Reference numeral 42 denotes a side piece of the steel frame 4. The side piece 42 is formed by bending both sides of the bottom piece 41, and the tip of the side piece is further bent inward to form a tip piece 43. In this case, the bottom piece 41 and the lower side piece 42 of the steel frame 4 are fire-resistant coated with a steel fire-resistant covering material or flooring material which becomes an adjacent beam.

  As shown in FIG. 3, the attachment structure of the fireproof covering material 1 attached as described above is provided with a gap H between the steel frame 4. The gap H is formed between the side piece 42 of the steel frame 4 and the tip piece 43.

  As described above, the fireproof covering material 1 of the present embodiment is obtained by laminating and polymerizing an indeterminate fireproof covering material body 2 having flexibility and flexibility and a shape retaining material 3 having self-supporting properties. Therefore, when attached to the steel frame 4 and fixed, the shape is maintained, and the construction becomes easy.

  In addition, the fireproof covering material 1 of the present example is a fireproof covering material body 2 comprising a non-vulcanized rubber containing a phosphorus compound, neutralized thermally expandable graphite, and an inorganic filler. Since it is a vulcanized rubber composition, it has remarkable fire resistance by forming an expanded heat insulating layer during heating and maintaining its shape.

  In addition, the fireproof covering material 1 of the present embodiment is resistant to heat and easy to bend according to the shape of the steel frame 4 to be coated because the shape maintaining material 3 is formed of a thin steel plate.

  Furthermore, since the attachment structure of the fireproof covering material 1 of this embodiment is attached to the steel frame 4 forming the beam with a gap H, it is insulated by the air layer, and the thickness of the fireproof covering material 1 is accordingly increased. Can be reduced. In particular, according to the fireproof covering material 1 of the present embodiment in which the fireproof covering material body 2 foams and exhibits fireproof performance in the event of a fire, since the gap H is foamed and filled, the fireproof performance can be reliably ensured.

  5 to 6 are embodiments as reference examples of the present invention, in which FIG. 5 is a perspective view of a fireproof coating material, and FIG. 6 is a cross-sectional view showing a mounting structure of the fireproof coating material.

  1A is a fireproof coating material, and this fireproof coating material 1A is formed by polymerizing a fireproof coating material body 2A and a shape-retaining material 3A having self-supporting properties, as shown in FIG. The fireproof covering material body 2A is provided with a thermal expansion property that expands when heated, which will be described later, and a softness and a flexibility. The shape retaining material 3 is formed of a thin metal plate made of a galvanized steel plate having a thickness of 0.2 mm.

  The fireproof coating material body 2A uses a bisphenol F type (manufactured by Yuka Shell) as an epoxy monomer, a diamine-based curing agent (manufactured by Yuka Shell) as a curing agent, and an ammonium polyphosphate ( AP422, manufactured by Hoechst), CA60S (manufactured by Nippon Kasei Co., Ltd.) is used as the heat-expandable graphite neutralized, and aluminum hydroxide (B703S, manufactured by Nippon Light Metal Co., Ltd.) is used as an inorganic filler. Calcium carbonate (Whiteon BF-300, manufactured by Bihoku Powder Chemical Co., Ltd.) was used.

  Each content of the refractory resin composition comprising a resin component (epoxy monomer and curing agent) containing the epoxy resin, a phosphorus compound, neutralized thermally expandable graphite, and an inorganic filler is the resin component 100. The total amount of phosphorus compound and neutralized thermally expandable graphite is 20 to 200 parts by weight with respect to parts by weight, the inorganic filler is 50 to 500 parts by weight, and neutralized thermally expandable graphite: phosphorus Each component was kneaded using a roll at a compounding ratio of 9: 1 to 1: 9 of the compound to obtain a monomer mixture. This monomer mixture was continuously cured at 140 ° C. to obtain a long sheet-shaped fireproof coating body 2A having a thickness of 3 mm.

  The method for manufacturing the fireproof covering material 1A was the same as that of the first example, and after applying the primer to the shape retaining material 3A and drying it, the adhesive was applied and the heat treatment was performed. Lamination polymerization is performed while adhering to the sheet-like fireproof covering material body 2A. A fireproof covering material 1A shown in FIG. 1 is obtained by cutting the laminated polymer into a predetermined length by cutting it into a predetermined length.

  Next, the long sheet-like fireproof coating material 1A obtained in the above process is processed into a predetermined shape by roll forming or the like according to the shape of the steel frame 4A described later. The steel frame 4A of the present embodiment constitutes a pillar of a unit building and is a square tube shaped steel.

  The fireproof covering material 1A is divided into a one-side covering material 1B that covers one outer peripheral surface of the steel frame 4A and an other-side covering material 1C that covers the other outer peripheral surface, and the one-side covering material 1B and the other side The covering material 1C is attached to the iron 4A bone by joining the edges 11B and 12C and 12B and 11C to each other. Note that a gap H is provided between the steel frame 4A and the one-side coating material 1B or the multi-side coating material 1C.

  The fireproof covering material 1A of the present embodiment is a fireproof covering material body 2A comprising a resin component containing an epoxy resin containing a phosphorus compound, neutralized thermally expandable graphite, and an inorganic filler. Since it is a resin composition, it has remarkable fire resistance by forming an expanded heat insulating layer upon heating and maintaining its shape.

  Moreover, since the shape retention material 3A is formed of a thin metal plate material, the fireproof covering material 1A is resistant to heat and can be easily processed according to the shape of the steel frame 4A to be coated.

  Furthermore, the mounting structure of the fireproof covering material 1A of the present embodiment is such that the fireproof covering material 1A covers the one side covering material 1B covering the outer peripheral surface on one side of the cross section of the steel frame 4A and the other side covering the outer peripheral surface on the other side of the cross section. Since it is divided into the covering material 1C and the one-side covering material 1B and the other-side covering material 1C are attached to the steel frame 4A with their edges joined to each other, attachment work can be easily performed.

It is one Example of the fireproof covering material of this invention, Comprising: (a) A figure is the perspective view, (b) A figure is sectional drawing. It is a perspective view of the fireproof covering material processed according to the shape of the steel frame covered. It is sectional drawing which shows the attachment structure of a fireproof covering material. It is explanatory drawing which shows the manufacturing process of the fireproof coating material of FIG. It is another Example of this invention, Comprising: It is a perspective view of a fireproof covering material. It is sectional drawing which shows the attachment structure of a fireproof covering material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A: Fireproof coating material 2, 2A: Fireproof coating material main body 3, 3A: Shape holding material 4, 4A: Steel frame 1B: One side coating material 1C: Other side coating material H: Gap

Claims (4)

A fire-resistant coating material obtained by polymerizing a heat-expandable fire-resistant coating material body that expands upon heating and a shape-retaining material having self-supporting properties,
The fireproof covering material body is provided with flexibility and flexibility, and includes a non-vulcanized rubber containing a phosphorus compound, neutralized thermally expandable graphite, and an inorganic filler. A vulcanized rubber composition,
The inorganic filler contains calcium carbonate or magnesium carbonate,
In the rubber composition, the total amount of the phosphorus compound and the neutralized thermally expandable graphite is in the range of 20 to 200 parts by weight with respect to 100 parts by weight of the non-vulcanized rubber. Is within the range of 50 to 500 parts by weight, and the weight ratio of the neutralized thermally expandable graphite and the phosphorus compound (thermally expandable black smoke: phosphorus compound) is 9: 1 to 1: 9 Fireproof covering material characterized by being in the range.   The fireproof covering material according to claim 1, wherein the shape retaining material is formed of a thin metal plate.   The fireproof coating material mounting structure according to claim 1, wherein the fireproof coating material is attached to a steel frame such as a beam or a column with a gap. The fireproof coating material is divided into a one-side coating material that covers the outer circumferential surface on one side of the cross section of a steel frame such as a beam or a column, and an other-side coating material that covers the outer circumferential surface on the other side of the cross section, The mounting structure for a fireproof coating material according to any one of claims 1 to 3, wherein the other side coating material is attached to the steel frame with its edges joined together.

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