JP2000192570A - Foamed fire resisting sheet composition and foamed fire resisting sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the impact resistance by preparing a composition containing a resin component, a frame retarder, a foaming agent, a carbonizing agent and a filler, including a thermoplastic resin as the resin component, the resin component having a Vicat softening point of a specified temperature or less. SOLUTION: A resin component containing a thermoplastic resin such as vinyl toluene-butadiene copolymer, the thermoplastic resin having a Vicat softening point of 75 deg.C or lower, is prepared. A flame retarder consisting of ammonium polyphosphate is prepared. A foaming agent consisting of melamine is prepared. A carbonizing agent consisting of dipentaerythritol is prepared. A filler consisting of titanium dioxide is prepared. To 100 pts.wt. of the resin component, 200-600 pts.wt. of the flame retarder, 40-150 pts.wt. of the foaming agent, 40-150 pts.wt. of the carbonizing agent, and 50-160 pts.wt. of the filler are mixed to prepare a foamed fire resisting sheet composition. The composition is further molded into a sheet to form a foamed fire resisting sheet. According to this, the impact resistance can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a novel foamed refractory sheet composition and a foamed refractory sheet.

[0002]

2. Description of the Related Art When structures such as buildings and civil engineering structures are exposed to high temperatures due to fires or the like, there is a problem that the physical strength of the steel frame and concrete of these structures rapidly decreases. On the other hand, a method has been adopted in which a refractory coating material is applied to a substrate to delay a rise in the temperature of the substrate and temporarily suppress a decrease in physical strength. As a typical method, for example, 1) an inorganic fibrous substance such as rock wool, asbestos, or glass fiber;
2) Light aggregates such as perlite and vermiculite 3)
There is known a wet refractory coating method in which an inorganic powder or the like containing crystal water is appropriately mixed, kneaded with water, and a paste or slurry coating material composition is thickened on a substrate surface.

[0003] However, in the coating composition used in the above method, depending on the type of the material used, for example, the fire resistance performance for one hour on columns, beams, etc. of a steel reinforced concrete structure (one hour heating in a standard heating curve). In this case, when the steel material temperature is 350 ° C. or less on average and 450 ° C. or less at the highest temperature), a coating thickness of about 20 to 40 mm is required, which results in a considerable thickness. For this reason, a relatively large amount of coating material must be carried in when performing construction at a building site, which is very disadvantageous in terms of cost. In addition, due to the thickening, the construction part projects significantly from the base material, which may give a sense of oppression in appearance. Furthermore, the coating layer may be peeled off or dropped off after the application. Therefore, development of a lighter coating material composition is required.

[0004] As another method for imparting fire resistance to a substrate,
2. Description of the Related Art There is known a method in which a coating film foams with a rise in temperature due to a fire or the like, thereby applying a foamed refractory paint which imparts fire resistance to a substrate by various methods. The foamed refractory paint contains a foaming component that is decomposed by a rise in temperature to generate a nonflammable gas, and a component that is carbonized to form a porous carbonized layer. That is, the fire extinguishing effect is exhibited by the generation of the noncombustible gas, and the heat insulating effect is exhibited by forming the porous carbonized layer by the carbonized component.

[0005] Therefore, according to the foamed refractory paint, even if the initial coating film is usually as thin as several mm or less, it is foamed at several times to several tens times by heating or the like in a fire to form an effective heat insulating layer. it can. Therefore, there is an advantage that the coating film can be made extremely thin compared to a wet type fire-resistant coating material, the feeling of oppression is small, and a clean feeling can be obtained. Further, compared to the wet type refractory coating material, less material is required, and the problem of cost can be solved.

However, when applying the foamed refractory paint, it is necessary to make the thickness uniform in order to make the fire resistance uniform, so it is necessary to thoroughly control the thickness at the time of painting. For this reason, the painting work must rely on skilled craftsmen. In addition, since it is a wet coating method, there is a disadvantage that it takes time to cure and the like, and there is a limit in shortening the construction period.

[0007] In recent years, fireproof coating with dry sheets has been performed in place of such a wet coating method. This is a method of coating a dry sheet prepared in advance on a substrate. Examples of the dry sheet include non-combustible fibers in the form of non-woven fabric, non-combustible non-woven fabric, cloth impregnated with a foamed fire-resistant paint such as woven fabric, and non-combustible materials such as aluminum foil. There are known those in which a foamed refractory paint is laminated on a sheet-like material. All of them are being put to practical use widely because their thickness can be easily controlled and curing is not required. Among the fire-resistant coatings made of such dry sheets, a sheet of a type having a small thickness, particularly at the time of construction, and being foamed to form a carbonized layer at the time of fire has been spotlighted.

[0008]

Such a sheet is called a foamed refractory sheet, which has the above-mentioned advantages, and is required to have sufficient impact resistance as a physical property.

For example, at the time of manufacturing a sheet, the sheet is mechanically cut by a rotary cutter, a guillotine cutter or the like in order to adjust the sheet to a certain size. Further, at the time of construction, the sheet is bent according to the shape of the construction site, or is nailed with nails, tacks, or the like to be attached to the frame. In this case, if the sheet is partially missing or partially or entirely cracked by these processes, the original fire resistance cannot be sufficiently exhibited. For this reason, it is easily lost by these processes,
The sheet is required to have performance that does not cause cracking or the like, that is, impact resistance.

However, the conventional foamed refractory sheet is
Insufficient impact resistance makes it unable to withstand various types of processing. In particular, this problem becomes more remarkable in a low-temperature environment.

On the other hand, in order to cope with this problem, it is conceivable to add a plasticizer to the sheet to impart flexibility. However, even if flexibility can be imparted by adding a plasticizer, another problem of reduced stain resistance may occur. That is, when the plasticizer in the sheet migrates to the sheet surface and the sheet surface is covered with the plasticizer, dust, sand, and the like easily adhere to the sheet surface. This becomes more remarkable when a large amount of a plasticizer is used.

The present invention has been made in view of these problems of the prior art, and in particular, has excellent impact resistance,
A main object of the present invention is to provide a foamed refractory sheet in which the occurrence of chipping, cracking and the like is suppressed or prevented.

[0013]

As a result of intensive studies, the present inventors have found that the above object can be achieved by including a specific resin component as a resin component in a foamed refractory sheet (composition). The invention has been completed.

That is, the present invention relates to the following composition for a foamed refractory sheet and a foamed refractory sheet.

1. A composition for a foamed refractory sheet, comprising a resin component, a flame retardant, a foaming agent, a carbonizing agent, and a filler, a thermoplastic resin as a resin component, and a resin component having a Vicat softening point of 75 ° C. or less. .

2. A foamed refractory sheet obtained by molding the composition for a foamed refractory sheet.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on its embodiments.

The composition for a foamed refractory sheet of the present invention contains a resin component, a flame retardant, a foaming agent, a carbonizing agent, and a filler, contains a thermoplastic resin as a resin component, and has a Vicat softening point of 75 ° C. It is characterized by the following.

In the composition of the present invention, the Vicat softening point of the resin component is 75 ° C. or lower, preferably 70 ° C. or lower. By controlling the Vicat softening point of the resin component to 75 ° C. or lower, excellent impact resistance can be particularly imparted to the finally obtained foamed refractory sheet. Further, the use of a large amount of a plasticizer can be avoided, and thereby the stain resistance can be improved.

Incidentally, the resin component refers to all resin components contained in the composition of the present invention. The Vicat softening point in the present invention indicates a value measured by JIS K 7206 (1991) "Testing method for Vicat softening temperature of thermoplastics".

Accordingly, the resin component is not particularly limited as long as the Vicat softening point can be kept at 75 ° C. or lower. For example, one or two or more of thermoplastic resins or other resins used as a binder in a known foamed refractory sheet can be appropriately used so that the Vicat softening point is 75 ° C. or lower.

The type of the thermoplastic resin is not particularly limited. For example, vinyl toluene-butadiene copolymer, vinyl toluene-acrylic acid ester copolymer, vinyl toluene-methacrylic acid ester copolymer, styrene-butadiene copolymer And a ternary copolymer of an ethylene-methacrylic acid ester copolymer or an acrylic acid monomer or a methacrylic acid monomer with two kinds of monomers constituting these copolymers.

The acrylic acid monomer or methacrylic acid monomer constituting these copolymers includes, for example, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, n-butyl acrylate, n-butyl acrylate, and n-butyl acrylate. Examples thereof include butyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, acrylamide, glycidyl acrylate, and glycidyl methacrylate.

The composition of the present invention contains a flame retardant, a foaming agent, a carbonizing agent and a filler as components other than the resin component. Each of these components is not particularly limited as long as it can exhibit various functions such as foaming of a sheet, formation of a carbonized layer, and generation of a nonflammable gas by a combined effect of each other, particularly in the event of a fire. Flame retardants, foaming agents, carbonizing agents, and fillers used in foamed refractory paints) can also be used as they are.

The flame retardant generally exerts at least one of a dehydrating cooling effect, a nonflammable gas generating effect, a binder carbonization promoting effect, and the like in a fire, and has an action of preventing or suppressing the burning of the binder. The flame retardant is not particularly limited as long as it has such an action, and the same flame retardant as in a known foamed refractory sheet can be used. For example, tricresyl phosphate, diphenylcresyl phosphate, diphenyloctyl phosphate, tri (β-
(Chloroethyl) phosphate, tributylphosphate, tri (dichloropropyl) phosphate, triphenylphosphate, tri (dibromopropyl) phosphate, chlorophosphate, bromophosphate, diethyl-N, N-bis (2- Organic phosphorus compounds such as hydroxyethyl) aminomethylphosphate and di (polyoxyethylene) hydroxymethylphosphonate; chlorinated polyphenyl, chlorinated polyethylene, diphenyl chloride, triphenyl chloride, pentachloride fatty acid ester, perchloropentane Chlorine compounds such as cyclodecane, chlorinated naphthalene, and tetrachlorophthalic anhydride; antimony compounds such as antimony trioxide and antimony pentachloride; phosphorus trichloride, phosphorus pentachloride, ammonium phosphate, and ammonium polyphosphate Phosphorus compounds such as beam; Other zinc borate, inorganic compounds such as boric acid sodium and the like. These can be used alone or in combination of two or more.
In the present invention, ammonium polyphosphate is particularly preferred.
When ammonium polyphosphate is used, the dehydration cooling effect and the incombustible gas generation effect can be more effectively exhibited, so that the flame retardant effect is high and the content of the foaming agent can be reduced. Are more advantageous than other flame retardants.

In general, a foaming agent plays a role of generating a nonflammable gas in the event of a fire, foaming a carbonizing binder and a carbonizing agent, and forming a carbonized heat insulating layer having pores. The foaming agent is not particularly limited as long as it has such an action, and the same foaming agent as that of a known foamed refractory sheet can be used. For example, melamine and its derivatives, dicyandiamide and its derivatives, azodicarbonamide,
Urea, thiourea and the like can be mentioned. These can be used alone or 2
More than species can be used. Among them, melamine, dicyandiamide, azodicarbonamide and the like are preferable because of their excellent nonflammable gas generation efficiency. In particular, melamine can be more preferably used.

In general, the carbonizing agent has a function of forming a thick carbonized heat insulating layer having better heat insulating property by dehydrating and carbonizing itself together with the carbonization of the binder due to a fire. The carbonizing agent is not particularly limited as long as it has such an effect, and the same carbonizing agent as that used in known foamed refractory sheets can be used. Examples include polyhydric alcohols such as pentaerythritol, dipentaerythritol, and trimethylolpropane, as well as starch and casein. These can be used alone or in combination of two or more. In the present invention, dipentaerythritol is particularly preferred because it has excellent dehydration cooling effect and carbonizing heat insulating layer forming effect.

The filler generally has an effect of improving the strength of the carbonized heat insulating layer and increasing the fire resistance. The filler is
The filler is not particularly limited as long as it has such an effect, and the same filler as that of a known foamed refractory sheet can be used. Examples include silicates such as talc; carbonates such as calcium carbonate and sodium carbonate; metal oxides such as aluminum oxide, titanium dioxide and zinc oxide; and natural minerals such as clay, clay, shirasu and mica. These can be used alone or in combination of two or more. Among these fillers, titanium dioxide is more preferred.

The mixing ratio of each component is not particularly limited as long as foaming can be performed well in the event of a fire and a carbonized heat-insulating layer having a high degree of heat insulation can be formed. 200 to 600 parts by weight (preferably 250 to 500 parts by weight) of a flame retardant and 40 to 500 parts by weight of a foaming agent
150 parts by weight (preferably 50 to 80 parts by weight), 40 to 150 parts by weight of the carbonizing agent (preferably 50 to 80 parts by weight) and 50 to 160 parts by weight of the filler (preferably 60 to 120 parts by weight).
Parts by weight). Within this range,
The foaming ratio of the carbonized heat insulating layer is high, the foaming is uniform, and more excellent heat insulating effect, strength and the like can be obtained.

In the composition of the present invention, in addition to these components, a reinforcing fiber, a coloring pigment and the like can be appropriately compounded if necessary. Examples of the reinforcing fibers include inorganic fibers such as rock wool, glass fibers, silica-alumina fibers, and carbon fibers, and organic fibers such as pulp fibers, polypropylene fibers, vinyl fibers, and aramid fibers.

As the color pigment, a general paint pigment (organic pigment / inorganic pigment) can be used. In the present invention, inorganic pigments such as red iron oxide, graphite, yellow iron oxide, titanium yellow, chrome green, ultramarine blue, and cobalt blue are particularly preferred. Further, expandable graphite, unexpanded vermiculite and the like may be blended in order to further enhance the fire resistance performance.

Further, a plasticizer such as dibutyl phthalate, dioctyl phthalate or chlorinated paraffin may be added to the composition of the present invention, if necessary. However, if the added amount of the plasticizer increases, the stain resistance may decrease. Therefore, it is preferable to reduce the added amount as much as possible. Usually, 30 parts by weight relative to 100 parts by weight of the resin component in terms of solid content is used. Parts by weight, preferably 15 parts by weight or less.

The composition of the present invention can be obtained by uniformly mixing these components according to a known method. There is no restriction on the order of mixing the components, and the components may be appropriately mixed according to the type of the components.

In particular, in the composition of the present invention, the smaller the solvent content, the better. The solvent content (total amount) in the composition of the present invention is usually 10% by weight or less, preferably 5% by weight or less.
The lower limit of the solvent content is not particularly limited as long as a uniform composition can be prepared. Usually, foamed refractory sheets include
The solvent contained in the manufacturing raw materials or the solvent blended during the manufacturing process remains without evaporating partially, but from the viewpoint of fire resistance, safety, workability, dimensional accuracy, etc. preferable. Therefore, in the present invention, by using a composition having a low solvent content, the residual amount of the solvent in the obtained sheet can be suppressed as low as possible.

Such a composition can be suitably prepared, for example, by using a solventless resin as a resin component. Therefore, in the composition of the present invention, it is preferable to use a solventless resin as a resin component. As the non-solvent type resin, a known resin can be used except that it does not contain a solvent. For example, if a resin in the form of beads or pellets is used as a solvent-free resin, the resin is heated to the softening temperature of the resin by a heating device, and the other components are mixed while kneading with a kneader or the like, the solvent content is low ( Alternatively, a composition for a foamed refractory sheet can be prepared. As the components other than the resin, the components and composition ratios of known foamed refractory sheets can be employed as they are. In addition,
As long as the solvent content is within the above range, a component containing a solvent can be used.

The foamed refractory sheet of the present invention can be obtained, for example, by forming the composition of the present invention into a sheet. As a molding method, virtually any method can be adopted as long as it can be molded into a sheet. For example, a method of casting the composition of the present invention into a mold, removing the composition after drying, a method of applying the composition of the present invention to release paper by a heating coater, winding the composition, and kneading the composition of the present invention using a kneader or the like. A method of processing a product into a sheet by an extruder, a method of supplying the composition of the present invention kneaded by a kneader or the like between a pair of rolls to process the sheet into a shape, and extruding the composition of the present invention into a pellet, followed by extrusion. A method of processing into a sheet by a machine, a method of rolling the composition kneaded with a Banbury mixer or a mixing roll by a calender comprising a plurality of hot rolls and processing into a sheet, and the like are possible.

The thickness of the foamed refractory sheet may be appropriately set according to the application site or the like, but is usually about 0.2 to 5 mm, preferably 0.5 to 2 mm. If it is less than 0.2 mm, sufficient fire resistance may not be obtained.
On the other hand, when the thickness exceeds 5 mm, the improvement in fire resistance performance corresponding to the thickness may not be sufficiently obtained. However, if necessary, the thickness may be outside the above range.

The foamed fire-resistant sheet of the present invention is applied to a part to be made a fire-resistant structure in a structure such as a building or civil engineering structure, for example, each part of a wall, a pillar, a floor, a beam, a roof, and a stair. Most of such construction sites are made of concrete or metal, but in particular, H steel, steel round pillars, steel prisms, etc. made of metal are coated with a rust preventive paint in advance as a rust preventive treatment. It is preferable to keep it. Further, the foamed refractory sheet of the present invention can be applied not only to concrete and metal but also to, for example, a wooden member, a resin-based member, and the like.

The foamed refractory sheet of the present invention may be prepared by applying an adhesive to a frame to which fire resistance is to be imparted and applying an adhesive to the frame in advance. Various methods are possible, such as a method of providing and attaching the foamed refractory sheet, and a method of hitting and fixing the foamed refractory sheet to the frame with nails, tacks, or the like.

When sticking the foamed refractory sheet, any method may be adopted as long as it can be treated so as to cover the entire frame. Therefore, for example, at the abutting portion of the sheets, the sheets are overlapped with each other, the narrow sheets are overlapped with each other, or the sheets are bonded together with an adhesive or heating or pressing, or a fire-resistant putty material is filled and applied. By doing so. In addition, it is also possible to cover with a fire-resistant gap tape, a foamed fire-resistant sheet cut into a tape shape, or the like. Thus, by essentially eliminating the gap between the butted portions, the original fire resistance performance can be more reliably obtained.

A decorative layer may be formed on the foamed refractory sheet of the present invention, if necessary. The decorative layer may be formed by a known construction method. For example, various paints may be applied to a foamed refractory sheet, or a decorative film, a decorative sheet, or the like may be laminated. In addition, for example, it is also possible to perform construction using a known stone-finished finishing material or the like.

Prior to the formation of the decorative layer, a cosmetic primer may be applied on the foamed refractory sheet as needed, if necessary. By applying the undercoat material, it is possible to mainly improve the adhesion between the sheet and the decorative layer after laminating the foamed refractory sheet. As the undercoat material, a known undercoat material can be adopted.

Further, a clear paint may be applied to the decorative layer for the main purpose of protecting the decorative layer. In particular, when installing on a site outside the structure where weather resistance is required,
It is preferable to apply a clear paint to the decorative layer. As the clear paint, a known clear paint can be adopted.

In the foamed refractory sheet of the present invention, it is possible to laminate a refractory material and a foamed refractory sheet to improve the fire resistance performance. For example, a fire-resistant material and a foamed fire-resistant sheet can be laminated in this order on a frame to be provided with fire resistance. The lamination method itself may be performed according to a known method. Examples of refractory materials include calcium silicate board, perlite cement board, gypsum board, rock wool board, glass wool heat insulating board, asbestos slate board, lightweight foam concrete board, foam mortar board, foam gypsum board, lightweight concrete board, cement extrusion. Examples include a molded plate, a molded plate of inorganic siding, metal siding, and the like, or a sheet, mat, blanket, or the like made of rock wool, ceramic wool, glass wool, slag wool, or the like.

[0045]

The foamed refractory sheet composition of the present invention contains a specific resin component, so that the foamed refractory sheet produced therefrom can exhibit excellent impact resistance. For this reason, even in processing under low temperature environment,
It does not crack and has excellent workability. As a result, the fire resistance performance of the foamed refractory sheet can be reliably obtained at any of the sites constructed with the foamed refractory sheet of the present invention.

Moreover, in the foamed refractory sheet of the present invention, since the amount of the plasticizer to be added can be reduced, an excellent effect on stain resistance can be exhibited.

In addition, when a solventless resin is used as the resin component of the composition of the present invention, the amount of solvent used can be reduced, so that not only fire resistance, but also safety, workability, dimensional accuracy, etc. are improved. Excellent effect can be exhibited.

As described above, the foamed refractory sheet of the present invention
Compared to conventional foamed refractory sheet, it can exert more excellent effects in impact resistance, workability, fire resistance, safety, dimensional accuracy, etc., and is widely used in fields, parts, applications, etc. where fire resistance is required be able to.

[0049]

EXAMPLES Examples and comparative examples are shown below to further clarify the features of the present invention.

Examples 1 to 4 and Comparative Examples 1 and 2 (1) Preparation of foamed refractory sheet A composition for a foamed refractory sheet was formulated so as to have the composition shown in Table 1. These were heated to 120 ° C., kneaded by a kneader, fed between rolls and processed, and allowed to cool at room temperature to obtain a sheet having a thickness of 1.5 mm.

[0051]

[Table 1]

In Table 1, the components used in the composition for a foamed refractory sheet are as follows.

Resin 1: ethylene-methacrylate copolymer resin, solid content 100%, Vicat softening point 44 ° C. Resin 2: ethylene-methacrylate copolymer resin
Solid content 100%, Vicat softening point 72 ° C Resin 3: Ethylene-methacrylate copolymer resin,
Solid content 100%, Vicat softening point 85 ° C Resin 4: Vinyl toluene-acrylate copolymer resin, Solid content 100%, Vicat softening point 64 ° C Flame retardant: Ammonium polyphosphate Foaming agent: Melamine Carbonizing agent: Dipentaerythritol Filling Agent: Titanium dioxide Plasticizer: Dibutyl phthalate (2) Tests and Results Each of the obtained sheets was subjected to an impact resistance test, a stain resistance test, and a fire resistance test. Table 2 shows the results. In addition, about each test, it implemented by the following method.

Impact resistance test The foamed refractory sheet was cut into 300 mm × 150 mm
At a temperature of 0 ° C., a 500 g weight was shot with a DuPont impact deformation tester, and the height at which cracks occurred in the foamed refractory sheet was measured. In the foamed refractory sheet of the present invention, it is preferable that the height is usually 300 mm or more (especially 400 mm or more).

Stain resistance test The foamed refractory sheet was adhered to a 150 mm x 70 mm x 3 mm steel plate and cured for 2 weeks to obtain a test specimen. The test specimen left for one week at a temperature of 50 ° C. was placed horizontally, and after spraying black silica sand, it was set upright, and the amount of the attached black silica sand was visually evaluated. The evaluation was ○: no adhesion, Δ: slight adhesion, ×: large amount of adhesion.

Fire resistance test A foamed fire-resistant sheet was sized 300 mm × 300 mm × 2.3 mm.
And then cured for 2 weeks to obtain a test specimen. The prepared specimen was used in JIS A 1304, "Fire resistance test method for building structural parts". On the basis of the standard curve defined in “Heating grade; Appendix 1”, one surface of the test piece was heated and heated in an electric furnace, and the elapsed time when the back surface temperature of the hot-rolled steel sheet reached 550 ° C. ( Min) was evaluated as fire resistance. Further, the foaming ratio of this test piece with respect to the dried coating film was measured.

[0057]

[Table 2]

As is clear from the results shown in Table 2, the impact resistance of Comparative Examples 1 and 2 in which the Vicat softening point of the resin component exceeded 75 ° C. was poor. Comparative Example 3 in which the amount of the plasticizer added was increased because the resin having a low Vicat softening point was not included.
It can be seen that, although the impact resistance can be increased, the contamination resistance is reduced.

On the other hand, the products of the present invention, Examples 1 to
It can be seen that No. 3 can simultaneously impart excellent impact resistance and stain resistance.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hideo Motoki 1-25-10 Shimizu, Ibaraki-shi, Osaka SK Kaken Co., Ltd. No. 1 Kashima Construction Co., Ltd. Technical Research Institute (72) Inventor Hideaki Kuwana 2-19-1, Tobita-Shi, Chofu-shi, Tokyo Kashima Construction Co., Ltd. Technical Research Institute F term (reference) 2E001 DE01 DE04 FA01 FA02 FA30 GA24 HF12 JA22 JA25 KA01 KA07 LA04 LA12 4F071 AA12 AA15 AA22 AB18 AB25 AC03 AC05 AC12 AC15 AE01 AE07 AE22 AF47 BC01 4J002 AB04Y AC08W AD02Y BB07W BB24X BC08W DE109 DE139 DE149 DE156 DE239 DH056 DJ009 DJ027 EB026 EB006 EB026 EB006

Claims (5)

[Claims] 1. A foam comprising a resin component, a flame retardant, a foaming agent, a carbonizing agent, and a filler, a thermoplastic resin as a resin component, and a resin component having a Vicat softening point of 75 ° C. or lower. Composition for refractory sheet. 2. In terms of solid content, 200 to 600 parts by weight of a flame retardant and 40 to 150 parts by weight of a foaming agent per 100 parts by weight of a resin component.
Parts by weight, 40 to 150 parts by weight of carbonizing agent and 50 to 1 filler
The composition for a foamed refractory sheet according to claim 1, which comprises 60 parts by weight. 3. The composition for a foamed refractory sheet according to claim 1, wherein the content of the solvent is 10% by weight or less. 4. The composition for a foamed refractory sheet according to claim 1, wherein a solvent-free resin is used as the resin component. 5. A foamed refractory sheet obtained by molding the composition for a foamed refractory sheet according to claim 1.