JP3220741B2 - Fireproof sheet material, fireproof sheet and fireproof coating method using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refractory sheet material, a refractory sheet and a refractory coating method using the same.

[0002]

2. Description of the Related Art Conventionally, it is legally required to apply a fireproof covering material to a steel-framed building civil engineering structure. This is performed in order to prevent the collapse of the structure due to the remarkable decrease in the strength of the steel frame accompanying the temperature rise in a fire or the like. As such a refractory coating material, rock wool, cement, various inorganic fillers and the like are used. These are sprayed on the steel frame surface,
It is necessary to have a large amount because it is thickened in units of tens of millimeters by troweling or the like, and an increase in weight cannot necessarily be avoided. Moreover, the appearance is often impaired by the feeling of weight due to thickening and the specific hue of rock wool, cement and the like.

In recent years, foamed refractory paints which can be colored like ordinary paints and can be applied relatively thinly with a film thickness of about several millimeters have been partially used. This coating material can impart heat insulation properties, fire resistance, and the like to the object to be coated by foaming and carbonizing the coating film due to a rise in temperature during a fire. This paint has been used for a long time as a fireproof coating material in Europe and the United States, and is also used in Japan for the purpose of preventing the spread of electric wires and the ignition of fuel tanks.

[0004] However, in the case of foamed refractory paints, the work is carried out at the construction site of a steel structure, which may not only cause contamination of the surrounding environment, but also uniformly apply to objects to be coated such as steel frames. It is extremely difficult to provide fire resistance. That is, even if a predetermined coating amount is set in advance, unevenness in the coating amount is unavoidable, and a portion having a large coating amount and a portion having a small coating amount are generated. Since the fire resistance is greatly affected by the thickness of the carbonized layer to be formed, the carbonized layer having a predetermined thickness is not formed in a portion where the amount of coating is small, resulting in a partially inferior fire resistance. In this case, it is conceivable to re-apply to the portion having a small amount of application after the construction, but it is practically almost impossible to measure all the application amounts of the already constructed steel frames.

[0005] On the other hand, a dry method in which the foamed refractory paint is formed into a dry sheet or tape in advance and the obtained sheet or tape is attached to an object to be coated is also performed.

[0006] However, given the properties of these coatings, in order to provide the desired fire resistance performance, the thickness should be about 0,0.
It is necessary to produce a sheet having a thickness of 5 to several mm. In this case, since the solid content is generally low in the foamed refractory paint, if a thick film sheet is to be produced, not only the drying time becomes longer, but also the coating film shrinks during drying,
Cracks may occur in the dried coating film. On the other hand, if the drying temperature is raised to forcibly accelerate the drying, bubbles are generated inside the coating film. In addition, if an attempt is made to increase the solid content ratio by reducing the amount of the solvent used, the viscosity inevitably increases, and it becomes impossible to uniformly mix powder components having fire resistance.

Further, these foamed refractory paints contain a certain amount of a solvent as an essential component. When a sheet is to be made from this paint, it is first applied to a certain film thickness and then dried to remove the solvent. Must be volatilized. That is, since the solvent is generally flammable or explosive, the volatile solvent may cause an explosion or the like. For this reason, explosion-proof equipment, odor removal equipment, or recent VOC
Due to regulations, a solvent recovery device and the like are required, and extremely large-scale equipment is required.

[0008] In this regard, for flat or non-planar substrates
(A) a compound containing phosphorus and / or sulfur, a synthetic resin,
There is known a refractory material formed by laminating an organic blowing agent and a phosphorus-containing / nitrogen foaming refractory coating agent comprising an inorganic compound other than the above compound, and (B) a chopped strand of glass fiber, and a method for producing the same. (JP-A-5-220879). According to this material, it is possible to ameliorate the problem in drying the coating film.

However, even in this material, since the solvent is contained as an essential component similarly to the above-mentioned foamed refractory paint, the above-mentioned problem in the solvent still remains, and there is still room for improvement.

A method has also been proposed in which a solvent-free thermoplastic resin is used for these paint systems, heated and melted together with a fire-resistant powder component, mixed, and cooled to form a sheet. . However, since the melting temperature is high, the powder components are decomposed and reacted in the sheet processing step. On the other hand, when the temperature is lowered, the viscosity of the resin does not decrease, so that the compounding amount of the powder component is limited. As a result, desired fire resistance cannot be obtained.

On the other hand, JP-A-5-220879 discloses a method in which a plastisol is kneaded with each component by a heating roll to form a sheet.
However, plastisols usually contain 50 parts by weight or more of a plasticizer with respect to 100 parts by weight of a resin. By blending such a large amount of a plasticizer, the plasticizer oozes out over time and discoloration occurs. The appearance of the sheet may be impaired due to the occurrence of spots or stains, and the sheet may be hardened over time. On the other hand, if the blending amount of the plasticizer is reduced, the fluidity as a sol rapidly decreases, and it becomes difficult to knead other components with a heating roll.

[0012]

Accordingly, an object of the present invention is to provide a material for a refractory sheet, a refractory sheet and a refractory coating method using the same, which can impart excellent fire resistance, heat insulation and the like uniformly. Main purpose.

[0013]

Means for Solving the Problems The present inventor has conducted intensive studies in view of the above-mentioned problems of the prior art, and as a result, when a specific resin and a powder component are used in combination, an excellent coating material is obtained. The present inventors have found that a sheet capable of uniformly imparting fire resistance, heat insulation, and the like can be obtained, and have completed the present invention.

That is, according to the present invention, a refractory sheet material containing a petroleum resin, a refractory powder and a toughener is melted,
It relates to a refractory sheet obtained by molding.

Hereinafter, the present invention will be described in detail.

The refractory sheet of the present invention is obtained by melting and molding a refractory sheet material containing a petroleum resin, a refractory powder and a toughener as described above.

As the petroleum resin, which is a component of the material for the refractory sheet, a known resin can be used as it is. For example, of the cracked fraction produced as a by-product from an ethylene plant that produces ethylene, propylene, etc. by steam cracking of petroleum, aliphatic to the ₅ fraction as a raw material (C ₅ series) petroleum resin,
Aromatic (C ₉ ) petroleum resin using C ₉ fraction as raw material, aliphatic / aromatic copolymer system (C ₅ C ₉ ) using both as raw materials
Examples include petroleum resins, alicyclic (DCPD) petroleum resins using high-purity dicyclopentadiene as a raw material, synthetic polyterpenes, and hydrogenated products thereof. One or more of these petroleum resins may be used. Among these petroleum resins, a hydrogenated resin having no unsaturated bond or little unsaturated bond is preferable from the viewpoint of excellent weather resistance and colorlessness.

These petroleum resins are usually solids in the form of pellets. In such a case, they may be melted at the time of use and used in a fluidized state. The softening temperature of the petroleum resin is generally not more than 170 ° C., but may be any temperature below the reaction temperature of the refractory powder. For example, the reaction temperature of the refractory powder is 200 ° C.
Then, a petroleum resin having a softening temperature of 200 ° C. or less may be used. In addition, since a temperature rise is expected due to sunlight or the like depending on a use site of the refractory sheet, the lower limit of the softening temperature is usually preferably about 70 ° C.

The melt viscosity of the petroleum resin is not particularly limited as long as it can be mixed with the fire-resistant powder. However, since the molecular weight of the petroleum resin is generally about one thousand and several hundred, most petroleum resins can be uniformly mixed with the refractory powder,
In order to increase the foaming ratio of the refractory sheet and further improve the refractory performance, it is necessary to be able to mix a large amount of powder having a refractory property. Therefore, it is desirable that the melt viscosity is usually about 0.03 to 5 Pa · S at 200 ° C.

In the present invention, the fire-resistant powder means a powder which reacts with other components such as petroleum resin with the rise in temperature to form a carbonized heat-insulating layer and exhibits heat-insulating and fire-extinguishing effects. Specifically, it is composed mainly of a flame retardant, a foaming agent, a carbonized layer forming agent and a filler. The flame retardant mainly prevents combustion of petroleum resin or the like due to temperature rise by a dehydration cooling action, an incombustible gas generation action, a carbonization promotion action of a binder, and the like. By blending these flame retardants, in particular, the combustion of the molten petroleum resin can be suppressed or prevented, and a carbonized heat insulating layer having good heat insulating properties and the like can be formed.

Specifically, tricresyl phosphate,
Diphenylcresyl phosphate, diphenyloctyl phosphate, tri (β-chloroethyl) phosphate, tributylphosphate, tri (dichloropropyl) phosphate, triphenylphosphate, tri (dibromopropyl) phosphate, chlorophosphonate, bromophosphonate, diethyl-N, N- Screw (2
Organic phosphorus compounds such as -hydroxyethyl) aminomethylphosphate, di (polyoxyethylene) hydroxymethylphosphonate, chlorinated paraffin, chlorinated polyphenyl, diphenyl chloride, triphenyl chloride, pentachloride fatty acid ester, perchloropentacyclodecane Chlorinated compounds such as chlorinated naphthalene and tetrachlorophthalic anhydride; antimony compounds such as antimony trioxide and antimony pentachloride; phosphorus compounds such as phosphorus trichloride, phosphorus pentachloride, ammonium phosphate and ammonium polyphosphate; zinc borate; And boric acid compounds such as sodium borate. One or more of these flame retardants may be used. Among them, in particular, because they have both the dehydrating cooling action and the incombustible gas generating action, they have excellent flame retardancy, and also have the advantage of being able to reduce the blending amount of the blowing agent described below.
It is preferred to use ammonium polyphosphate.

The foaming agent foams a carbonized layer formed by a petroleum resin, a carbonized layer forming agent or the like mainly by generating a nonflammable gas, thereby forming a carbonized heat insulating layer having a foam structure. That is, by blending the foaming agent, pores can be particularly introduced into the carbonized layer, and the heat insulating property can be further improved.

Specific examples include melamine and its derivatives, dicyandiamide and its derivatives, azodicarbonamide, urea, thiourea and the like, and one or more of these foaming agents may be used. Among them, it is particularly preferable to use melamine, dicyandiamide, azodicarbonamide, etc., which are excellent in the generation efficiency of nonflammable gas.

The carbonized layer forming agent forms a carbonized heat insulating layer by dehydration and carbonization together with carbonization of the petroleum resin. By blending the carbonized layer forming agent, carbonization of the petroleum resin can be promoted while mainly preventing combustion decomposition of the petroleum resin and the like.

Specific examples include polyhydric alcohols such as starch, casein, pentaerythritol, dipentaerythritol and trimethylolpropane. One or more of these carbonized layer forming agents can be used. Among these, it is particularly preferable to use dipentaerythritol because of its excellent dehydration cooling function and ability to form a carbonized heat insulating layer.

The filler mainly contributes to imparting strength and improving fire resistance of the carbonized heat insulating layer. The blending of the filler can prevent the carbonized heat-insulating layer from peeling off due to embrittlement of the carbonized layer.

Specifically, silicates such as talc, carbonates such as calcium carbonate and sodium carbonate, oxides such as aluminum oxide, titanium dioxide and zinc oxide, and clay-like materials such as clay, clay, shirasu and mica And one or more of these can be used. Among them, it is preferable to use titanium dioxide or the like.

The toughness-imparting agent has a role of particularly increasing the energy required for breaking the coating film. Specifically, phthalate compounds such as di-2-ethylhexyl phthalate, diisononyl phthalate, and dibutyl phthalate; trimellitic acid such as tri-n-trioctyl trimellitate, dipentaerythritol ester, and mixed alcohol trimellitate; Ester compounds,
Fatty acid ester compounds such as butyl oleate, epoxidized soybean oil, epoxidized linseed oil, epoxy compounds such as epoxidized fatty acid alkyl esters, isobutyl adipate, adipate compounds such as di-2-ethylhexadipate, Phosphate ester compounds such as tricresyl phosphate, tri-2-ethylhexyl phosphate, triphenyl phosphate, 2-ethylhexyl diphenyl phosphate, and cresyl diphenyl phosphate; mineral oils such as aroma-based process oils and naphthene-based process oils; chlorination Examples include chlorinated products such as paraffin and chlorinated aliphatic esters, polymer oils such as polybutene and polybutadiene, and resins such as alkyd resins and xylene resins. One or more of these toughness imparting agents may be used. Among these, it is particularly preferable to use ester compounds such as phthalate ester compounds, trimellitate ester compounds, adipate ester compounds, and phosphate ester compounds.

The compounding ratio of each component in the material for a refractory sheet of the present invention is not particularly limited as long as a carbonized heat insulating layer is formed by a temperature rise due to a fire or the like and a predetermined heat insulating property, fire resistance and the like are exhibited. In addition, it can be set as appropriate depending on the type of the component used, desired characteristics, application, use site, and the like. Usually, about 50 to 600 parts by weight, preferably 150 to 6 parts by weight of the fire-resistant powder is added to 100 parts by weight of the petroleum resin.
The amount may be about 00 parts by weight and about 5 to 150 parts by weight of a toughness imparting agent, preferably 15 to 100 parts by weight.

The mixing ratio of each component in the fire-resistant powder can be appropriately changed depending on the kind of the component used, but usually, the flame retardant is about 30 to 85% by weight, the foaming agent is about 4 to 35% by weight, and the carbonized layer is formed. Agent 4 ~ 35% by weight, filler 5 ~
About 40% by weight, more preferably about 40 to 70% by weight of a flame retardant, about 8 to 25% by weight of a foaming agent, and 8 to 25% of a carbonized layer forming agent
% By weight and about 5 to 30% by weight of filler.

In the material for a refractory sheet of the present invention, various known additives can be blended in addition to the above components, as long as the effects of the present invention are not impaired. For example, in order to adjust the sheet properties, glass fibers of about 3 to 10 mm, silica-alumina fibers, polyester fibers, organic or inorganic fibrous materials such as vinyl fibers, or middle glass,
Glass flakes and the like can be blended. It is also possible to add a coloring pigment which is generally used for coloring the sheet, or a colored aggregate obtained by applying a colored coating to silica sand, cold water stone, calcium carbonate particles, mica, metal foil or the like. Further, a liquid flame retardant may be added to further enhance the flame retardancy of the sheet.

The material for a refractory sheet of the present invention can be obtained by blending these materials. The blending procedure is not particularly limited. For example, first, a petroleum resin pellet is melted in a heating tank, and then a toughness-imparting agent and a fire-resistance-imparting powder are added and uniformly mixed, or a pre-melted petroleum resin, a toughness-imparting agent and a fire-resistance-imparting agent are added. A method in which the powder is charged into a tank and uniformly mixed, or a method in which these materials are charged and kneaded in a heating kneader, etc., can be used.
In the present invention, the material for a refractory sheet includes all materials from a melt to a solid.

The refractory sheet material of the present invention is processed into a sheet shape in a molten state to form the refractory sheet of the present invention. The sheet forming method is not particularly limited, and a known sheet forming method can be used. For example, extrusion molding is performed using a die having a preset thickness, or the gap is adjusted to a desired sheet thickness. It can be formed into a sheet by roll extrusion using a roller. The molded refractory sheet material hardens as the temperature decreases, and finally becomes the refractory sheet of the present invention at about room temperature. The thickness of the refractory sheet of the present invention may be appropriately determined according to the use site, the application, and the like, and is usually about 0.2 to 3 mm.

In the fire-resistant sheet of the present invention, by further providing a protective layer, it is possible to effectively prevent deterioration of each component in normal times. As the protective layer, known materials such as an external paint having excellent weather resistance and a laminate of a waterproof sheet can be used. In addition, by incorporating a coloring pigment, a coloring aggregate, and the like into the protective layer, the protective layer can be used for the purpose of coloring the refractory sheet.

The refractory sheet of the present invention is coated by sticking to a substrate to which fire resistance is to be imparted with an adhesive or a pressure-sensitive adhesive. As the adhesive or pressure-sensitive adhesive, known adhesives used for adhesion of building materials and the like can be used as they are, for example, those based on rubber, acrylic, vinyl, vinyl acetate, ethylene-vinyl acetate, epoxy, etc. Can be used.

In this case, at the joint portion between the refractory sheets, the respective refractory sheets are overlapped and thermocompression-bonded, or the refractory sheets are abutted without overlapping, and the refractory sheet is separately cut to a narrow width. A refractory sheet obtained by abutting the refractory sheets at the joints is overlapped with each other, and these are heat-compressed or subjected to a seam treatment using a refractory putty-like material, whereby a seamless refractory sheet layer can be formed. As the refractory putty-like material, known materials can be used.For example, as inorganic materials, those containing various fillers using water glass as a binder, organic materials such as polysulfides, silicones, urethanes, Water-based acrylic, water-based SBR
And a butyl-based putty material mixed with a flame retardant, a material obtained by softening the material for a fire-resistant sheet of the present invention, a fire-resistant paint conventionally used, and the like. By the coating treatment as described above, in particular, it is possible to more effectively prevent the refractory sheet from peeling off with time and the occurrence of cracks in the carbonized heat insulating layer when a fire occurs.

In addition to the method of imparting fire resistance by sticking only a fire-resistant sheet as a base material as described above, a sheet obtained by laminating another sheet material in advance on a fire-resistant sheet is stuck to the base material. You may. As the shape of the sheet, a single leaf sheet may be used, or a sheet cut into a long tape shape may be wound. Further, it is also possible to heat-press the refractory sheet without using an adhesive and directly bond and coat.

[0038]

The operation of the refractory sheet according to the present invention proceeds mainly by the following mechanism.

When the temperature rises in the event of a fire, the flame retardant in the fire-resistant powder is decomposed, delaying the rise in the temperature of the object to be coated by the dehydration and cooling action, and the digestion action due to the generation of nonflammable gas. Demonstrate. Further, a carbonized layer is formed by a combined reaction between the petroleum resin and the carbonized layer forming agent in the fire-resistant powder. On the other hand, the foaming agent is decomposed, and the carbonized layer becomes a foam structure containing a large number of cells. At this time,
The non-flammable gas also contributes to the foam structuring in a complex manner.
The carbonized heat-insulating layer is formed in this manner, but since the filler is dispersed in the skeleton thereof, the carbonized heat-insulating layer is held on the surface of the object without peeling off. The formed carbonized heat-insulating layer exhibits heat insulating properties due to its foam structure, and can subsequently delay a rise in temperature of the object to be coated.

In particular, in the present invention, the use of a petroleum resin enables uniform mixing with the fire-resistant powder and the toughness-imparting agent, so that a fire-resistant sheet excellent in homogeneity can be obtained.
Further, by the synergistic action of the petroleum resin and the fire-resistant powder, carbonization can be promoted, and a carbonized heat-insulating layer capable of exhibiting excellent heat-insulating properties can be formed.

[0041]

According to the refractory sheet of the present invention, the following remarkable effects can be obtained.

(1) The thickness of the refractory sheet at the time of manufacture becomes the coating film thickness as it is, and the thickness and control of the coating film can be easily and reliably controlled as compared with conventional refractory paints and the like.
Therefore, a uniform layer can be formed, and excellent heat insulation and fire resistance can be imparted to the object to be coated. Also,
Because of the sheet, the problem of environmental pollution can be solved. (2) In order to form a sheet of a conventional solvent-based or water-based foamed refractory paint, the solid content ratio is low and the viscosity is low, so that the film thickness is sufficient to exhibit the required fire resistance. On the other hand, the refractory sheet of the present invention has no solvent and has a low viscosity at the time of melting, so that extrusion molding or hot roll molding is easy, and a sheet having a large film thickness is produced at one time. It is also possible. (3) By adjusting the compounding ratio of the petroleum resin and the toughness imparting agent, it is possible to obtain various kinds of materials from a flexible fire-resistant sheet to a hard fire-resistant sheet. In particular, when it has flexibility, it can be wound or bent and used, so that it can be easily attached to a substrate having a complicated shape. (4) When attaching a fire-resistant sheet to impart fire resistance to a base material, the seam portion of the fire-resistant sheet is treated by stacking the fire-resistant sheets, and then heating and thermocompression-bonding the petroleum resin. By doing so, each refractory sheet can be integrated,
In addition to being excellent in workability, appearance after construction, etc., it is possible to more effectively prevent the refractory sheet from peeling off over time and the carbonized heat insulating layer from being cracked when a fire occurs.

[0043]

EXAMPLES Examples and comparative examples will be shown below to clarify features of the present invention.

Example 1 A refractory sheet was manufactured using the materials shown in Table 1 and in the proportions shown in Table 2. First, a temperature-controllable silicone oil bath is set at 160 ° C., and a petroleum resin is charged into a cylindrical container to be softened and melted. Then, a toughener and a fire-resistant powder are charged, mixed, and fire-resistant. The sheet material was prepared as a paste. This paste together with the release sheet was passed between two rolls whose gap width was adjusted to 2 mm while being rolled, and then the release sheet was peeled off. The refractory sheet (thickness 2 mm) obtained in this way is
It was adhered to an iron plate of cm × 30 cm × 0.18 cm using an acrylic adhesive and used as a test body for a heating test.

The test piece was placed on a ceramic board, and the test piece was heated together with the ceramic board for 60 minutes based on a standard temperature heating curve specified in JIS A 1304 Fire Resistance Test Method for Building Structure. After the heating, the test specimen was immediately taken out together with the ceramic board, and the thickness of the foamed carbon layer was measured. At this time, the foaming ratio from the initial thickness of the refractory sheet of 2 mm was calculated. as a result,
The expansion ratio was 31.6 times.

Examples 2 to 10 Fireproof sheets (thickness the same as in Example 1) were produced in the same manner as in Example 1 except that the respective materials shown in Table 1 were used and the mixing ratios shown in Table 2 were used. . In addition, the same test as in Example 1 was performed on the obtained refractory sheet, and the expansion ratio was determined. Table 2 shows the results.

[0047]

[Table 1]

[0048]

[Table 2]

Comparative Example 1 A fire-resistant sheet was produced in the same manner as in Example 1 except that the respective materials shown in Table 1 were used and the mixing ratios shown in Table 3 were used. Did not melt enough to mix the refractory powder.

Therefore, the temperature of the silicone oil bath is set to 230 ° C.
And the toughness-imparting agent and the refractory-imparting powder were blended. However, the refractory-imparting powder reacted immediately after the addition, and a refractory sheet could not be obtained.

Comparative Examples 2 and 3 A fire-resistant sheet was prepared in the same manner as in Example 1 except that the materials shown in Table 1 were used and the mixing ratios shown in Table 3 were used. At 160 ° C., the refractory powder did not melt enough to be mixed.

Therefore, the temperature of the silicone oil bath is set to 190 ° C.
Comparative Example 2 was prepared by blending a toughness-imparting agent and a fire-resistance-imparting powder, but having a high melt viscosity.
In Comparative Example 3, only 30 parts by weight could be blended. The same test as in Example 1 was conducted using the sheet (thickness is the same as in Example 1) obtained from the paste for producing a refractory sheet obtained in this manner. As a result, Comparative Example 2 was 2.2 times, and Comparative Example 3 was 3.8 times, which is extremely smaller than that of the Examples, indicating that a sufficient fire resistance effect cannot be expected.

[0053]

[Table 3]

Comparative Example 4 A fire-resistant powder comprising 80 parts by weight of melamine, 100 parts by weight of pentaerythritol, 400 parts by weight of ammonium polyphosphate and 120 parts by weight of titanium dioxide was mixed with an acrylic copolymer resin at 100 parts by weight in terms of solids. , Toluene 10
The mixture was dispersed in 0 parts by weight to produce a refractory paint. When it is attempted to form a coating film having a dry film thickness of 2 mm in the same manner as in the example by using this fire-resistant paint, an application amount of 4 kg per m ² is required, and it is difficult to spray-coat at a time. Was. For this reason, when it was manufactured by pouring into a mold, drying required 12 hours at room temperature, and cracks occurred on the surface of the dried coating film.

──────────────────────────────────────────────────続 き Continuing on the front page (51) Int.Cl. ⁷ Identification symbol FI // B29K 55:00 B29K 55:00 (72) Inventor Hideo Motoki 1-25-10 Shimizu, Ibaraki-shi, Osaka Research Institute (72) Inventor Tomio Ouchi 2-9-1-1, Tobita-Ki, Chofu-shi, Tokyo Kashima Construction Co., Ltd.Technical Laboratory (72) Keiichi Miyamoto 2-1-1, Tobita-Kiyita, Chofu-shi, Tokyo (56) References JP-A-52-103898 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04B 1/94 B29C 65/02 C08J 5 / 18 C08J 9/06 C08L 57/02 B29K 55:00

Claims (16)

(57) [Claims] 1. A fire-resistant sheet obtained by melting and molding a material for a fire-resistant sheet, characterized by containing a petroleum resin, a fire-resistant powder and a toughening agent. 2. The fire-resistant sheet according to claim 1, wherein the fire-resistant powder comprises a flame retardant, a carbonized layer forming agent, a filler and a foaming agent. 3. The fire-resistant sheet according to claim 2, wherein the flame retardant is at least one of an organic phosphorus compound, a chlorine compound, an antimony compound, a phosphorus compound and a boric acid compound. 4. The flame retardant comprises tricresyl phosphate, diphenylcresyl phosphate, diphenyloctyl phosphate, tri (β-chloroethyl) phosphate,
Tributyl phosphate, tri (dichloropropyl) phosphate, triphenyl phosphate, tri (dibromopropyl) phosphate, chlorophosphonate, bromophosphonate, diethyl-N, N-bis (2-hydroxyethyl) aminomethyl phosphate, di (polyoxyethylene) Hydroxymethylphosphonate, chlorinated paraffin, chlorinated polyphenyl, diphenyl chloride, triphenyl chloride, pentachloride fatty acid ester, perchloropentacyclodecane, chlorinated naphthalene, tetrachlorophthalic anhydride, antimony trioxide, antimony pentachloride, trichloride The refractory sheet according to claim 2, which is at least one of phosphorus, phosphorus pentachloride, ammonium phosphate, ammonium polyphosphate, zinc borate, and sodium borate. 5. The refractory sheet according to claim 2, wherein the carbonized layer forming agent is at least one of starch, casein, pentaerythritol, dipentaerythritol and trimethylolpropane. 6. The refractory sheet according to claim 2, wherein the filler is at least one of talc, calcium carbonate, sodium carbonate, aluminum oxide, titanium dioxide, zinc oxide, clay, clay, shirasu and mica. 7. A foaming agent comprising: melamine and its derivatives, dicyandiamide and its derivatives, azodicarbonamide,
3. The refractory sheet according to claim 2, which is at least one of urea and thiourea. 8. The fire-resistant sheet according to claim 2, wherein the flame retardant is ammonium polyphosphate, the carbonized layer forming agent is dipentaerythritol, the filler is titanium dioxide, and the blowing agent is melamine. 9. A toughness-imparting agent comprising a phthalic acid ester compound, a trimellitic acid ester compound, a fatty acid ester compound, an epoxy compound, an adipic acid ester compound, a phosphate ester compound, a mineral oil, a chlorinated product, The refractory sheet according to claim 2, which is at least one kind of resin. 10. The toughness imparting agent is di-2-ethylhexyl phthalate, diisononyl phthalate, dibutyl phthalate, tri-n-trioctyl trimellitate, dipentaerythritol ester, mixed alcohol trimellitate, butyl oleate, epoxidation. Soybean oil, epoxidized linseed oil, epoxidized fatty acid alkyl ester, isobutyl adipate, di-2-ethylhexyl adipate, tricresyl phosphate, tri-2-ethylhexyl phosphate, triphenyl phosphate, 2-ethylhexyl diphenyl phosphate, cresyl diphenyl phosphate , Aroma-based process oil, naphthene-based process oil, chlorinated paraffin, chlorinated aliphatic ester, polybutene, polybutadiene, alkyd resin and xylene resin Refractory sheet even without a one claim 2, wherein. 11. A petroleum resin having a softening point not exceeding 170 ° C. and a melt viscosity at 200 ° C. of 0.0
The fireproof sheet according to claim 1, wherein the pressure is 3 to 5 Pa · S. 12. A fire-resistant powder (50 to 600 parts by weight) and a toughening agent (5 to 150 parts) per 100 parts by weight of petroleum resin.
The refractory sheet according to claim 1, which is blended by weight. 13. A fire-resistant powder, comprising a flame retardant of 30 to 30.
85% by weight, 4-35% by weight carbonized layer forming agent, 5-filler
The refractory sheet according to claim 12, wherein 40% by weight and 4 to 35% by weight of a foaming agent are blended. 14. When attaching the refractory sheet according to any one of claims 1 to 13 to a substrate, a part of each refractory sheet is overlapped at a joint between the refractory sheets,
A refractory coating method comprising thermocompression bonding the overlapped portion. 15. A refractory for seam treatment, wherein the refractory sheet is separately cut into a narrow width at a joint portion between the refractory sheets when the refractory sheet according to any one of claims 1 to 13 is adhered to a substrate. A fireproof coating method, comprising: stacking a sheet on each of the fireproof sheets at a joint portion; and thermocompression bonding the overlapped portion. 16. When the refractory sheet according to any one of claims 1 to 13 is adhered to a base material, a joint process between the refractory sheets is performed by using a refractory putty-like material. Fireproof coating method.