JP3218359B2 - Foamed refractory laminate and method of forming 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 foamed fire-resistant laminate which foams and carbonizes upon heating in a fire to impart heat insulation or fire resistance to a coating to be protected, and maintains excellent fire resistance for a long time. The present invention relates to a foamed fire-resistant laminate capable of fully exhibiting its fire-resistant performance during foaming, and a method for forming such a foamed fire-resistant laminate.

[0002]

2. Description of the Related Art In structures such as buildings and civil engineering structures, the mechanical strength of steel and concrete, which are the base materials of these structures, rapidly decreases due to high temperatures such as fires. It has been practiced to apply a refractory coating material to a substrate to delay the temperature rise of the substrate.
Typical examples of such methods include inorganic binders such as cement, inorganic fibrous substances such as rock wool, asbestos, and glass fibers; lightweight aggregates such as perlite and vermiculite; inorganic powders containing water of crystallization; Are appropriately selected and mixed, kneaded with water, and a paste or slurry mixture composition is thickened on the substrate surface by a wet refractory coating method.

[0003] However, the known coating composition used in such a wet refractory coating method depends on the type of material used. Performance (When heated for 1 hour according to the standard heating curve, the steel material temperature is 350 ° C or less on average and 4 at the maximum temperature.
(Below 50 ° C.), a coating thickness of about 20 to 40 mm is required, which is a considerable thickness. Therefore, when performing construction at a construction site, a heavy coating material must be carried in, which raises a problem that transportation costs are increased. Also, when performing thickening work,
Since the construction part protrudes greatly from the base material and gives a sense of oppression,
From an aesthetic point of view, it is not always satisfactory. Furthermore, accidents such as peeling and falling off may occur after construction.

[0004] As another method for imparting fire resistance to a substrate, a coating film is foamed when the temperature rises due to a fire or the like, and a foamed refractory paint for imparting fire resistance to the substrate is sprayed on the substrate. ,
There is a method of applying by trowel coating, brush coating, roller coating, or the like. This paint contains a foaming component that decomposes due to a rise in temperature to generate incombustible gas, and a component that carbonizes to form a porous carbonized layer. Along with
The heat insulating effect is exhibited by the formation of the porous carbonized layer by the carbonization component. Since such a foamed refractory paint is foamed at several times to several tens times by heating in a fire to form a heat insulating layer, the initial coating film usually has a thickness of about several mm or less. Therefore, the coating film becomes extremely thin compared to the wet-type fire-resistant coating material, has less pressure, and has a refreshing feeling. In addition, compared to the wet type fire-resistant coating material, less material is used, and the problem of transportation is solved.

[0005] Accordingly, construction methods using foamed fire-resistant paint are being widely adopted for parts of buildings where fire resistance is required and steel frame appearance is required. One example of such a foamable refractory paint and a method for producing the same is disclosed in Japanese Patent Application Laid-Open No. 5-220879.
This publication discloses that (A) a compound containing phosphorus and / or sulfur, a synthetic resin, an organic blowing agent, and an inorganic compound other than the compound containing phosphorus and / or sulfur are added to a planar or non-planar laminate. And a method for producing the same by laminating a phosphorus-containing / nitrogen foaming refractory coating agent comprising: (B) a chopped strand of glass fiber.

Furthermore, recently, such a coating film of a foamed refractory paint before foaming and carbonization is applied to a more aesthetic or design property, that is, a color paint such as a general paint for construction and civil engineering. The demand for diversity has increased. However, if a coloring agent such as a coloring pigment is mixed into the foamed refractory paint in order to color the foamed refractory paint itself, it is expected that the fireproof performance will be reduced or the cost will be increased. Therefore, in order to respond to the demand for improving the aesthetic appearance by such coloring, at present, a coating film of foamed refractory paint is used as a main material layer, and a conventionally used general-purpose coloring paint is laminated as a finishing layer. A function separation method is used in which the fire resistance effect is achieved by the main material layer and the color effect is obtained by the finish layer. For example, in the technology described in the above-mentioned Japanese Patent Application Laid-Open No. 5-220879, decorativeness is improved by attaching decorative plywood, veneer, wallpaper and the like to the surface of the refractory material laminated on the laminate. .

[0007] In addition, many components having high hydrophilicity are used as components for imparting foaming fire resistance in the foamed fire-resistant paint. Therefore, if the foamed fire-resistant paint is used outside in a state where only the foamed fire-resistant paint is applied, the durability or the water resistance of the coated layer itself is inferior. Due to the fact that the paint film has already deteriorated, uniform and good foaming, which is supposed to be performed, is not performed, and the desired fire resistance performance may not be exhibited. Since such a problem can be solved by further laminating a protective finish layer having excellent durability or water resistance, the protective finish layer is laminated.

[0008]

However, in the case of a foamed refractory paint film before foaming and carbonization due to the occurrence of a fire, any type of protective finish layer may be used as long as the main material layer and the protective finish layer are in close contact with each other. However, when the temperature rises due to a fire or the like, it has been found that, depending on the type of material constituting the protective finish layer, foaming and carbonization of the main material layer is inhibited, and the intended fire resistance effect may not be obtained. .

In addition, in recent years when a unique architectural style is preferred, if the coating film of the foamed refractory paint does not have long-term durability, swelling, peeling, discoloration, etc. occur, and It has also been found that a new problem of impairing the appearance or aesthetic appearance may occur.

Accordingly, the present invention comprises a main material layer and a protective finish layer, which maintains an aesthetic appearance for a long period of time outdoors, exhibits excellent durability and water resistance, and has a protective finish layer when the temperature rises due to fire or the like. It is a main object of the present invention to provide a foamed fire-resistant laminate which exhibits an intended excellent fire-resistant performance without hindering the foaming carbonization action of the main material layer.

[0011]

Means for Solving the Problems The present inventor has made intensive studies on the foaming mechanism of the main material layer of the foamed refractory paint and the protective mechanism of the protective finish layer while paying attention to the above-mentioned problems of the prior art. As a result, when a material having a thermal decomposition temperature lower than the foaming start temperature of the main material layer formed by the foamed refractory paint is applied on the main material layer as a protective finish layer, the protective finish layer is normally applied. Found that the main material layer could be protected for a long period of time, and that the main material layer could be foamed uniformly and well in the event of a fire, without being hindered by the protective finish layer.

That is, the present invention provides the following foamed refractory laminate and a technique related thereto. 1. When the surrounding temperature reaches a predetermined foaming temperature due to a fire, the foam is foamed, and on a main material layer made of a foamed refractory material for generating nonflammable gas and forming a carbonized heat insulating layer, the main material layer is protected at normal times, and A foamed fire-resistant laminate comprising a protective finish layer that is thermally decomposed below the foaming temperature of the main material layer in the event of a fire.

2. When the surrounding temperature reaches a predetermined foaming temperature due to a fire, it foams, forms a main material layer by applying a foamed refractory paint that generates nonflammable gas and forms a carbonized heat insulating layer, and then forms a main material layer under normal conditions Forming a protective finish layer on the main material layer, which protects the main material layer and thermally decomposes at a temperature lower than the foaming temperature of the main material layer in case of fire.

3. When the foamed refractory paint is converted to a solid content, the flame retardant is 200 to 600 parts by weight based on 100 parts by weight of the binder.
Parts by weight, 40 to 150 parts by weight of a foaming agent, 40 to 15 parts of a carbonizing agent
3. The method for forming a foamed refractory laminate according to the above item 2, wherein the composition is composed of 0 parts by weight and 50 to 160 parts by weight of a filler.

4. The foamed refractory paint is, in terms of solid content, based on 100 parts by weight of a vinyl toluene-butadiene copolymer and / or vinyl toluene-acrylate copolymer as a binder, and 200 to 600 parts by weight of ammonium polyphosphate as a flame retardant. Item 4, wherein melamine is 40 to 150 parts by weight as a foaming agent, dipentaerythritol is 40 to 150 parts by weight as a carbonizing agent, and titanium dioxide is 50 to 160 parts by weight as a filler. The method for forming a foamed refractory laminate of the present invention.

5. The foamed refractory paint is based on 100 parts by weight of vinyltoluene-butadiene copolymer and / or vinyltoluene-acrylate copolymer as a binder, and 200 to 600 parts by weight of ammonium polyphosphate as a flame retardant. Parts, 40 to 150 parts by weight of melamine as a foaming agent, 40 to 150 parts by weight of dipentaerythritol as a carbonizing agent, 50 to 160 parts by weight of titanium dioxide as a filler, and 30 to 160 parts by weight of chlorinated paraffin as a plasticizer. Item 5. The method for forming a foamed refractory laminate according to any one of Items 2 to 4 above, which is constituted by a proportion.

6. When the surrounding temperature reaches a predetermined foaming temperature due to a fire, the foam is foamed, and on a main material layer made of a foamed refractory material for generating nonflammable gas and forming a carbonized heat insulating layer, the main material layer is protected at normal times, and A foamed fire-resistant laminated sheet characterized by laminating a protective finish layer which thermally decomposes below the foaming temperature of the main material layer in case of fire.

[7] When the foamed refractory material is 100 to 100 parts by weight of the binder in terms of solid content, the flame retardant is 200 to 600.
Parts by weight, 40 to 150 parts by weight of a foaming agent, 40 to 15 parts of a carbonizing agent
Item 7. The foamed fire-resistant laminated sheet according to Item 6, comprising 0 parts by weight and 50 to 160 parts by weight of a filler.

8. When the foamed refractory material is 100 to 100 parts by weight of vinyltoluene-butadiene copolymer and / or vinyltoluene-acrylate copolymer as a binder, 200 to 600 parts by weight of ammonium polyphosphate is used as a flame retardant in terms of solid content. 6. The above item 6 or 7, wherein 40 to 150 parts by weight of melamine as a foaming agent, 40 to 150 parts by weight of dipentaerythritol as a carbonizing agent, and 50 to 160 parts by weight of titanium dioxide as a filler. The foamed fire-resistant laminated sheet according to the above.

9. The foamed refractory material is, on a solid content basis, based on 100 parts by weight of a vinyl toluene-butadiene copolymer and / or a vinyl toluene-acrylate copolymer as a binder, and ammonium polyphosphate and chlorinated paraffin as flame retardants. 200 to 60 in total
0 parts by weight, 40 to 150 parts by weight of melamine as a foaming agent, and 40 to 15 parts of dipentaerythritol as a carbonizing agent.
0 parts by weight, 50 to 160 parts by weight of titanium dioxide as a filler and 30 to 160 parts of chlorinated paraffin as a plasticizer
Item 9. The foamed fire-resistant laminated sheet according to any one of Items 6 to 8, wherein the laminated sheet is composed of parts by weight.

10. Tensile strength at room temperature is 20-300N
/ Cm ^2, bending resistance is 10mm or less foam fire resistant laminated sheet according to any one of claim 6 to 9.

11. When the surrounding temperature reaches a predetermined foaming temperature due to a fire, it foams, and on one surface of a main material layer made of a foamed refractory material that generates a nonflammable gas and forms a carbonized heat insulating layer,
A protective finish layer that protects the main material layer during normal operation, and thermally decomposes below the foaming temperature of the main material layer in the event of a fire, is laminated on the other surface of the main material layer. A foamed fire-resistant laminated pressure-sensitive adhesive sheet, wherein the sheets are sequentially laminated.

12. When the foamed refractory material is converted to a solid content,
Flame retardant 200 to 60 parts per 100 parts by weight of binder
0 parts by weight, foaming agent 40 to 150 parts by weight, carbonizing agent 40 to 1
Item 12. The foamed fire-resistant laminated pressure-sensitive adhesive sheet according to item 11, which is constituted by 50 parts by weight and 50 to 160 parts by weight of a filler.

13. When the foamed refractory material is converted to a solid content,
With respect to 100 parts by weight of vinyl toluene-butadiene copolymer and / or vinyl toluene-acrylate copolymer as binder, 200 to 600 parts by weight of ammonium polyphosphate as a flame retardant and 40 to 150 parts by weight of melamine as a blowing agent 13. The foamed fire-resistant laminated pressure-sensitive adhesive sheet according to any of the above items 11 to 12, comprising 40 to 150 parts by weight of dipentaerythritol as a carbonizing agent and 50 to 160 parts by weight of titanium dioxide as a filler. .

14. When the foamed refractory material is converted to a solid content,
With respect to 100 parts by weight of vinyl toluene-butadiene copolymer and / or vinyl toluene-acrylate copolymer as binder, 200 to 600 parts by weight of ammonium polyphosphate as a flame retardant and 40 to 150 parts by weight of melamine as a blowing agent The above-mentioned items 11 to 13, which are composed of 40 to 150 parts by weight of dipentaerythritol as a carbonizing agent, 50 to 160 parts by weight of titanium dioxide and 30 to 160 parts by weight of chlorinated paraffin as a filler. The foamed fire-resistant laminated adhesive sheet according to any one of the above.

15. Tensile strength at room temperature is 20-300N
Item 15. The foamed fire-resistant laminated pressure-sensitive adhesive sheet according to any of the above items 11 to 14, wherein the foamed fire-resistant laminated pressure-sensitive adhesive sheet has a flexural resistance of 10 mm / cm ² and a flexibility of 10 mm or less.

16. 11. A fire-resistant coating method, comprising applying an adhesive to a frame to which fire resistance is to be imparted, and then adhering the foamed fire-resistant laminated sheet according to any one of the above items 6 to 10.

17. Item 1 above for the frame to be provided with fire resistance
A fire-resistant coating method, comprising attaching the foamed fire-resistant laminated adhesive sheet according to any one of 1 to 15.

18. After applying an adhesive to the frame to which fire resistance is to be applied, when the surrounding temperature reaches a predetermined foaming temperature due to a fire, foaming occurs, and a foamed fire resistant sheet that generates nonflammable gas and forms a carbonized heat insulating layer is attached. And a protective finish layer which, under normal conditions, protects the foamed refractory sheet and thermally decomposes at a temperature below the foaming temperature of the foamed refractory sheet in the event of a fire. Forming method.

19. When the surrounding temperature reaches a predetermined foaming temperature due to a fire, foaming occurs, and a pressure-sensitive adhesive layer provided with a peelable sheet on the surface is laminated on one surface of the main material layer that generates nonflammable gas and forms a carbonized heat insulating layer. After peeling off the peelable sheet of the foamed refractory material pressure-sensitive adhesive sheet, it is adhered to the frame to be provided with fire resistance through the pressure-sensitive adhesive layer, and further protects the foamed fire-resistant material sheet in a normal state, and A method for forming a foamed refractory coating, which comprises applying and forming a protective finish layer that thermally decomposes at a temperature below the foaming temperature of the foamed refractory material sheet in a fire.

20. 20. The method according to the above item 18 or 19, wherein a plurality of foamed refractory material sheets or a foamed refractory material adhesive sheet is adhered to a skeleton, and then a temperature of an ambient temperature caused by a fire is applied to a bonded portion of the plurality of sheets. When the foaming temperature reaches a predetermined foaming temperature, foaming is performed, and a foamed refractory paint for generating a nonflammable gas and forming a carbonized heat insulating layer is applied. And a protective finish layer that is thermally decomposed at a temperature lower than the foaming temperature of the foamed refractory material sheet or foamed refractory material adhesive sheet in the event of a fire, and is applied over the entire body to form a foamed refractory coating. Forming method.

21. After applying an adhesive to the edge portion of the H-shaped steel, the foamed refractory laminate according to the above item 6 is attached, and then, the surrounding temperature is predetermined by a fire on the remaining portion such as the web and the flange and the edge portion. When the foaming temperature reaches the foaming temperature, the foamed refractory paint that generates nonflammable gas and forms a carbonized heat insulating layer is applied, and then, in a normal state, the foamed refractory laminate is protected. A method for forming a foamed refractory coating on an H-shaped steel, which comprises applying a protective finishing layer which thermally decomposes below the foaming temperature of the refractory laminate to the entire surface.

22. The adhesive sheet for foamed refractory material according to the above item 11 is adhered to the edge of the H-section steel, and then foamed when the surrounding temperature reaches a predetermined foaming temperature due to fire on the remaining portions such as webs and flanges. After applying a foamed fire-resistant paint that generates a reactive gas and forms a carbonized heat-insulating layer, the foamed fire-resistant laminated pressure-sensitive adhesive sheet is further protected under normal conditions, and at a temperature below the foaming temperature of the foamed fire-resistant laminated pressure-sensitive adhesive sheet during a fire. A method for forming a foamed refractory coating on an H-shaped steel, wherein a protective finish layer causing thermal decomposition is applied on the entire surface.

Here, the term "thermal decomposition temperature of the protective finish layer" means that the molecular bond of the polymer binder which is a main component of the protective finish layer formed on the unfoamed main material layer is almost cleaved. It is equivalent to temperature. The thermal decomposition temperature of such a protective finishing layer can be measured from the temperature at which a thermogravimetric curve is drawn on the unfoamed protective finishing layer using a thermogravimetric analyzer and the thermogravimetric curve sharply decreases. it can.

Since the foaming temperature of the main material layer made of the foamed refractory paint is set at about 300 to 350 ° C. from the correlation between the temperature rise due to the occurrence of fire and the decrease in the strength of the frame.
A protective finish layer having a lower thermal decomposition temperature than this may be laminated on the main material layer. However, if the thermal decomposition temperature of the protective finish layer is lower than 100 ° C., the foamed refractory material or paint is not foamed when unfoamed. Since the desired function of protecting the main material layer and maintaining long-term durability is not fulfilled, the thermal decomposition temperature of the protective finish layer is not more than the foaming temperature of the main material layer and 100%.
It is desirable to be in the range of 325 ° C.

The main material layer composed of the foamed refractory material or paint of the present invention foams and carbonizes when the temperature rises in a fire or the like to form a carbonized heat insulating layer and imparts fire resistance to the object to be coated. Is what you do.

[0037] The foamed refractory paint for forming the main material layer contains, as essential components, a binder, a flame retardant, a foaming agent, a carbonizing agent, a filler, and a solvent for making the paint liquid.

The binder in the foamed refractory paint is one of the main components of the main material layer coating in an unfoamed state. When a fire occurs, the binder reacts with the other components contained in the coating to cause carbonization. It becomes a part of the heat insulating layer. Therefore, as such a binder, any synthetic resin or natural resin that can be mixed with other components of the main material layer and can form a film can be used. From the viewpoints of the strength of the carbonized heat-insulating layer, the magnitude of the expansion ratio, the uniformity of the foaming, and the like, the binder may be vinyl toluene-butadiene copolymer, vinyl toluene- (meth) acrylate copolymer, styrene- ( (Meth) acrylic acid ester copolymer, styrene-butadiene copolymer resin; terpolymer of two kinds of monomers constituting these copolymers with acrylic acid monomer, methacrylic acid monomer, etc .; one-component curing type A polymer having a weight average molecular weight of about 50,000 to 200,000 selected from an epoxy resin or the like is preferable.

As one-component curing type epoxy resins, bisphenol A type, bisphenol F type, novolak type,
Epoxy resins such as resorcinol type, cyclic ester type, and aliphatic ester type, which have thermoplasticity.

The (meth) acrylate monomer component in the copolymer containing the (meth) acrylate component includes methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, 2-ethylhexyl acrylate, Examples include ethylhexyl methacrylate, n-butyl acrylate, n-butyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, acrylamide, glycidyl acrylate, and glycidyl methacrylate.

As the binder, the above polymers may be used alone or in combination of two or more.

Among the above polymers as binders,
Vinyl toluene-butadiene copolymer and vinyl toluene-acrylate copolymer are more preferred.

The other components in the foamed refractory paint for forming the main material layer are roughly classified into a flame retardant, a foaming agent, a carbonizing material and a filler, and a solvent for forming a paint.
Each of these components other than the solvent contributes as a whole to the functions of foaming the main material layer, forming a carbonized layer, and generating a nonflammable gas due to the mutual action of each other when a fire occurs.

Specifically, the flame retardant exerts at least one effect such as a dehydration cooling effect, an incombustible gas generating effect, and a carbonization promoting effect of the binder at the time of fire to prevent or suppress the burning of the binder. Flame retardants include tricresyl phosphate, diphenylcresyl phosphate,
Diphenyloctyl phosphate, tri (β-chloroethyl) phosphate, tributylphosphate, tri (dichloropropyl) phosphate, triphenylphosphate, tri (dibromopropyl) phosphate, chlorophosphonate, bromophosphonate, diethyl-
Organic phosphorus compounds such as N, N-bis (2-hydroxyethyl) aminomethyl phosphate and di (polyoxyethylene) hydroxymethylphosphonate; chlorinated polyphenyl, chlorinated polyethylene, diphenyl chloride, triphenyl chloride, pentaphenyl chloride Chlorine compounds such as chlorinated fatty acid esters, perchloropentacyclodecane, chlorinated naphthalene, and tetrachlorophthalic anhydride; antimony compounds such as antimony trioxide and antimony pentachloride; phosphorus trichloride, phosphorus pentachloride, ammonium phosphate, and ammonium polyphosphate And other inorganic compounds such as zinc borate and sodium borate. At least one of these is used. In particular, when ammonium polyphosphate is used, since the dehydration cooling effect and the incombustible gas generation effect are particularly well exhibited, the flame retardant effect is high, and there is also an effect that the amount of the following foaming agent can be reduced. More preferred. If such a flame retardant is not added to the foamed refractory paint, the molten binder will burn in the event of a fire, and a carbonized heat insulating layer having sufficient heat insulating properties cannot be formed.

The foaming agent has an effect of generating a nonflammable gas in the event of a fire, foaming the carbonizing binder and the following carbonizing agent, and forming a carbonized heat insulating layer containing pores. As blowing agents, melamine and its derivatives,
Dicyandiamide and its derivatives, azodicarbonamide, urea, thiourea and the like are used, and at least one of these is used. Among these, melamine, dicyandiamide, azodicarbonamide and the like are more preferable because of their excellent nonflammable gas generation efficiency, and melamine is particularly preferable. In the case where such a foaming agent is not blended, pores imparting heat insulating properties are not formed in the carbonized layer, so that the desired fire resistance effect cannot be obtained.

The carbonizing agent exerts an effect of forming a carbonized heat insulating layer having a more excellent heat insulating property by dehydrating and carbonizing itself together with the carbonization of the binder by fire. Examples of the carbonizing agent include polyhydric alcohols such as pentaerythritol, dipentaerythritol, and trimethylolpropane; starch, casein, and the like, and at least one of them is used. In particular, dipentaerythritol is more preferable because it has excellent dehydration cooling effect and carbonizing heat insulating layer forming effect. When such a carbonizing agent is not blended, the carbonized layer is formed only of the binder, so that sufficient carbonization of the binder does not proceed, combustion decomposition occurs, and the intended fire resistance effect can be obtained. Can not.

The filler has the effect of improving the strength of the carbonized heat insulating layer and improving the fire resistance. As fillers, silicates such as talc; carbonates such as calcium carbonate and sodium carbonate; aluminum oxide, titanium dioxide,
Metal oxides such as zinc oxide; natural minerals such as clay, clay, shirasu, and mica; and at least one of them is used. Among these fillers, titanium dioxide is more preferred. If such a filler is not added, the carbonized layer formed at the time of a fire is fragile and fragile, so that the carbonized heat-insulating layer is peeled off and the desired fireproof effect cannot be obtained.

The mixing ratio of each component constituting the main material layer made of the foamed refractory material or paint is such that foaming can be performed well at the time of fire occurrence and a carbonized heat insulating layer having a high heat insulating property can be formed. Although not particularly limited, as a solid content, usually 100 parts by weight of the binder, the flame retardant 200 to 600
Parts by weight, 40 to 150 parts by weight of a foaming agent, 40 to 15 parts of a carbonizing agent
0 parts by weight and 50 to 160 parts by weight of a filler may be blended.

The foamed refractory material or paint for forming the main material layer, because of the high expansion ratio of the carbonized heat insulating layer, the uniform foaming, the excellent heat insulating effect, and the high strength. In terms of solids content, 100 parts by weight of a vinyltoluene-butadiene copolymer and / or a vinyltoluene-acrylate copolymer as a binder were mixed with ammonium polyphosphate as a flame retardant in an amount of 2 parts by weight.
Approximately 00 to 600 parts by weight, 40
More preferably, about 150 to 150 parts by weight, about 40 to 150 parts by weight of dipentaerythritol as a carbonizing agent, and about 50 to 160 parts by weight of titanium dioxide as a filler.

Further, in the above-mentioned composition using ammonium polyphosphate as a flame retardant, it is particularly preferable to use chlorinated paraffin as a plasticizer, as described later. In this case, the chlorinated paraffins are
It is preferable to add about 30 to 160 parts by weight with respect to 0 parts by weight.

The main material layer made of the above-mentioned foamed refractory material or paint may contain a reinforcing fiber, a chromatic coloring pigment other than white, etc., if necessary. Examples of the reinforcing fibers include rock wool, glass fibers, and inorganic fibers such as silica-alumina fibers. In addition, as long as the fire resistance of the main material layer is not impaired, inorganic fibers and organic fibers such as pulp may be used in combination. As the chromatic color pigment other than white, general pigments for paints can be used. However, assuming that the main material layer is exposed to high temperatures due to a fire,
Inorganic pigments for coatings such as chrome green, ultramarine blue, and cobalt blue are more preferred. The amounts of the reinforcing fibers and the chromatic coloring pigments other than white are not particularly limited as long as the foaming properties of the main material layer at the time of fire occurrence are not impaired.

The foamed refractory paint for forming the main material layer is in a liquid state because the binder used is varnish (solvent solution of resin). The solids concentration in the paint is
It may be appropriately determined according to the performance required according to the place of use, the constituent components selected in accordance with this, the usage form of the main material layer described in detail below, and the like.
About 0 to 98% by weight, more preferably 70 to 85% by weight
It is about.

For adjusting the viscosity, the drying property, the workability and the like of the foamed refractory paint for forming the main material layer, a diluting solvent may be added as required. Such a solvent is not particularly limited as long as it has compatibility with the solvent of the resin solution constituting the binder and does not react with each component of the foamed refractory paint. Examples of such a solvent include aromatic solvents such as toluene and xylene; and aliphatic solvents such as ketones, glycol esters, and mineral spirits. These diluting solvents are substantially the same as the solvents used for preparing the above resin solution.

The foamed refractory material or paint for forming the main material layer according to the present invention can be easily produced by a conventional method. For example, each of the above components and / or
Alternatively, the solvent solution may be mixed at a predetermined ratio. More specifically, for example, a method may be employed in which a binder solution is charged into a mixing tank, and other components are sequentially charged while stirring with a dissolver.

The foamed fire-resistant paint thus obtained is formed on the frame to be provided with fire resistance with a foamed carbonized heat insulating layer having a thickness sufficient to exhibit the fire resistance required in the event of a fire. Apply as much as possible. The frame to be provided with fire resistance is not particularly limited, but includes, for example, steel frames (beams and columns), partition walls, fire-resistant doors, fire-resistant safes,
Tunnel inner walls, fuel tanks, solvent storage tanks, gas and oil pipelines and their supports; protective covers for equipment that may generate sparks, such as motors, pumps, generators; seals for penetrations of fire compartments; Electric wires and the like are included. Coating may be performed by spray coating using a spray gun, an airless spray gun, a pump, or the like, iron coating, roller coating, brush coating, or the like, according to a conventional method.

After the foamed refractory paint has dried and the main material layer coating film has been formed, it is lower than the foaming temperature of the main material layer in order to form a protective finishing layer when the main material layer is not foamed. A coating material that thermally decomposes at a temperature is applied on the main material layer in the same manner as the foamed refractory paint.

The protective finishing layer coating material formed from such a coating material satisfies the above-mentioned temperature conditions at the time of thermal decomposition, adheres closely to the main material layer, and furthermore, the non-foamed state of the main material layer From the viewpoint of the protective function, it is necessary that various coating film properties such as water resistance, light resistance, durability, and weather resistance, particularly excellent in water resistance, be provided. The coating material that can be used to form the protective finish layer that satisfies the above conditions is preferably one in which the main chain of the binder resin is a vinyl polymer based on the degree of molecular bond cleavage. In particular, in the exterior of structures where high water resistance, weather resistance, etc. are required, a synthetic resin containing a fluorine atom, a silyl group, or the like in a side chain functional group is preferable, and from the viewpoint of environmental protection, A low volatility terpen-soluble or NAD (non-aqueous dispersion) synthetic resin is desirable.

Referring to the embodiments shown in the drawings below,
The present invention will be described in more detail.

FIG. 1 is a schematic cross-sectional view showing one example of the foamed fire-resistant laminate according to the present invention in which the main material layer 2 is applied to the frame 1 and the protective finish paint 3 is applied. In addition, any of the drawings shown below is a schematic cross-sectional view of the foamed refractory laminate according to the present invention.

The foamed refractory laminate according to the present invention is a method in which a foamed refractory paint is previously formed into a sheet as a foamed refractory material, and the sheet is adhered to a frame using an adhesive or a sheet laminated with an adhesive. It may be used by a method of sticking it to a skeleton through an interface.

In the embodiment shown in FIG. 2, a sheet is formed in which a protective finish layer 5 is preliminarily laminated on the surface of a main material layer 4 formed of a foamed refractory paint. At the time of construction,
As shown in the figure, a foamed refractory laminated structure is formed on the skeleton with the adhesive layer 6 interposed between the skeleton (not shown) and the main material layer 4.

Alternatively, as shown in FIG. 4, a foamed refractory sheet comprising only the main material layer 4 is adhered to a frame (not shown) by an adhesive layer (not shown) and then protected on the surface thereof. A finish paint (not shown) may be applied and laminated.

Further, as shown in FIG. 5, after a foamed fire-resistant pressure-sensitive adhesive sheet comprising the main material layer 4 and the adhesive layer 6 is adhered to a frame (not shown), a protective finish paint (not shown) is applied. ) May be applied and laminated. Furthermore, as shown in FIG. 6, after adhering a plurality of foamed refractory sheets composed of only the main material layer 4 to the frame 1 via the adhesive layer 6, the present invention is applied to the joint portion 2. And then a protective finish paint 3 can be applied over the entire surface and laminated. In this case, since the seam of the foamed fire-resistant sheet does not appear on the surface, it is desirable in terms of aesthetic appearance, and it is also possible to prevent the presence of the seam portion 2 from adversely affecting the fire resistance performance.

Further, according to the present invention, as shown in FIG. 7, it is possible to protect the H-section steel. That is, a foamed fire-resistant pressure-sensitive adhesive sheet composed of a main material layer 4 having a pressure-sensitive adhesive layer 6 laminated on the back surface is adhered to the edge portion of the H-shaped steel, and then foaming is applied to the entire surface including the web, flange and the sheet surface. A refractory paint 2 is applied, and a finish coating material having excellent weather resistance is further applied as a protective finish layer 3. With such a configuration,
The problem of insufficient coating amount at the edge part when finished with the foamed fire-resistant paint alone, and the formation of the carbonized heat-insulating layer due to the foaming of the foamed fire-resistant paint at the time of a fire causes large distortion at the edge, resulting in carbonized heat insulation. The problem of delamination of the layers can be prevented.

In the present invention, when a sheet-like material is used, the thickness of the foamed fire-resistant main material layer and the protective finish layer can be made constant. There is a merit that the application amount can be easily managed as compared with the case where the application is performed by another method such as the spraying method. In the case of forming a sheet, the foamed refractory material main material layer may have to be imparted with a certain degree of flexibility to enable sheeting. What is necessary is just to mix a plasticizer. As a plasticizer in such a case, chlorinated paraffin; phthalic acid esters such as dibutyl phthalate and di-n-octyl phthalate; and phosphoric acid esters such as tributyl phosphate and tri-2-ethylhexyl phosphate are used. it can. Although the plasticizer is not particularly limited, it is usually 30 to 160 based on 100 parts by weight of the solid content of the binder.
What is necessary is just to mix | blend by the ratio of a weight part. In particular, chlorinated paraffins also exhibit a synergistic effect of a dehydration cooling effect and an incombustible gas generation effect in the presence of ammonium polyphosphate which is the above-mentioned flame retardant, so that they can be used particularly in combination with ammonium polyphosphate. preferable. When both are used in combination, the ratio is up to about 70 parts by weight, more preferably about 20 to 50 parts by weight, based on 100 parts by weight of ammonium polyphosphate.

The method for forming the foamed refractory paint of the present invention into a sheet is not limited to a specific method as long as a sheet-like material can be obtained. For example, the foamed refractory paint is spray-coated, or a flow coater or knife is used. A method in which the support is peeled off after being applied to the support by a coater such as a roll coater, a roll doctor coater, a comma roll coater, a reverse roll coater, a calender roll coater, and a rod coater; Direct sheet forming method: After the foamed refractory paint is poured into a sheet-like frame, it can be removed by any method such as a method of removing the mold. When an adhesive layer, a protective finish layer, and the like are provided, they can be laminated by the same spraying method or the above-mentioned coater coating method using the foamed refractory material sheet itself as a support. Further, in the sheet provided with the pressure-sensitive adhesive layer, it is desirable that a peelable sheet on which a release agent is laminated is laminated on the surface of the pressure-sensitive adhesive layer in order to protect the pressure-sensitive adhesive layer when not in use.

The adhesive to be applied to the pressure-sensitive adhesive layer or the main body is mainly composed of natural rubber and recycled rubber, and a rubber-based adhesive using a rosin-based resin, polyterpene resin or the like as a tackifier; acrylic acid Acrylic adhesive comprising a polymer of an ester and a copolymer with vinyl monomers such as vinyl acetate, vinylidene chloride, methacrylate, acrylic acid and methacrylic acid; vinyl chloride-vinyl acetate copolymer, vinyl acetate Vinyl-based pressure-sensitive adhesive obtained by adding a plasticizer to a vinyl-based polymer such as a polymer or polyvinyl butyral: a known material such as a silicone-based pressure-sensitive adhesive composed of a rubber-like siloxane having a siloxane bond in the main chain and a resin-like siloxane. Can be used. Among these pressure-sensitive adhesives or adhesives, acrylate polymer, silicone-based pressure-sensitive adhesives, which have particularly high heat resistance and do not generate decomposition gas when heated, are preferable.

The physical properties of the foamed refractory paint sheet are as follows:
It is not particularly limited as long as it can be formed into a sheet, but has a tensile strength of 20 to 300 N / cm ² and a bending resistance of 10 mm.
If it is below, the workability of the sheet is good and the surface crack is not generated, which is advantageous. When a protective finish layer is laminated on the main material layer of the sheet, it is necessary that the laminated sheet as a whole has the physical properties described above. For this reason, as the protective finish layer, an elastic material, for example, a material that can be used as JIS A 6910 “Multi-layer finish coating material waterproof type top coat” is preferable.

[0069]

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

The performance of each test piece in the following examples and comparative examples was determined by the following method.

I. Fire resistance and expansion ratio JIS A 1304 “Fire resistance test method for building structural parts” 4. On the basis of the standard curve defined in “Heating Grade; Appended FIG. 1,” one surface of the test piece was heated and heated in an electric furnace, and the elapsed time (minute) when the back surface temperature of the hot zinc steel sheet reached 600 ° C. ) Was defined as fire resistance, and the test piece was measured for the expansion ratio with respect to the dried coating film.

II. State of coating film after accelerated deterioration 9.8 of JIS K 5400 “Coating general test method”
After performing an acceleration test for 350 hours using a sunshine carbon arc lamp type weather resistance tester specified in "Accelerated weather resistance", the state of the coating film on the surface of the test piece was visually evaluated. Evaluation criteria are
Samples without any swelling or cracks were marked with “○”, those with slight swelling were marked with “△”, and those with significant swelling or cracks were marked with “x”.

The details of each component used in the following Examples and Comparative Examples are as follows.

A. Binder A-1; one-pack type modified epoxy resin, solid content 40%, weight average molecular weight 35,000 A-2; vinyl toluene-butadiene copolymer, solid content 40%, weight average molecular weight 7,800 A-3; vinyl toluene-acryl Acid ester copolymer, solid content 40%, polymerization average molecular weight 8300 A-4; silicon-modified acrylic resin, solid content 50%, weight average molecular weight 15,000 Flame retardant B-1; ammonium polyphosphate B-2; chlorinated paraffin C.I. B. Foaming agent C-1; Melamine C-2; Dicyandiamide C-3; Azodicarbonamide Carbonizing agent D-1; pentaerythritol D-2; dipentaerythritol Filler E-1; titanium dioxide E-2; talc F. Diluting solvent F-1; xylene Examples 1 to 8 The components to be used for forming the foamed refractory main material layer were selected from the above materials A to F, and the compositions shown in Table 1 (the numerical values represent the solid content in the binder). (Representing a relative amount of 100 parts by weight).

[0075]

[Table 1]

For production, first, a binder and a diluting solvent were charged into a mixing and stirring tank, and a flame retardant, a foaming agent, a carbonizing agent and a filler were sequentially charged while stirring and mixing with a dissolver. When these components were uniformly mixed, stirring was stopped to obtain a foamed refractory paint having a viscosity of 130 PS.

Next, the foamed refractory paint thus produced was spray-coated at a coating amount of 3 kg / m ² using a hot-rolled steel sheet of 300 mm × 300 mm × 9 mm as a base material.
Cured and dried. The film thickness of the main material layer obtained from the obtained foamed refractory paint was 1.5 mm.

Then, as a protective finish layer, any one of the following protective finish layer forming paints 1 to 8 was applied to the surface of the main material layer comprising the coating film of the foamed refractory paint at an application amount of 0.30 kg / kg.
m ^{2, and} spray cured and dried and cured.

The hot rolled steel sheet having the foamed refractory laminate thus prepared was cured for 2 weeks to prepare a test piece, which was subjected to a predetermined test. The results shown in Table 2 were obtained. Table 2 also shows combinations of the main material layer and the protective finish layer. Table 2 also shows the results of Examples 9 and 10 described later.

The manufacturers and trade names of the paint for forming the protective finish layer are as follows.

1; “SK Eco Fine” manufactured by SK Chemical Co., Ltd. 2; “Nack Base” manufactured by SK Chemical Co., Ltd. 3; “Elastic color enamel” manufactured by SK Chemical Co., Ltd. 4; Elastic fussolon enamel 5; "SK Mild Urethane" manufactured by SK Kaken Co., Ltd. 6; "Elastic urethane color" manufactured by SK Kaken Co., Ltd. 7; Company “Fussolon enamel” The thermal decomposition temperature was calculated by a thermogravimetric analyzer (Rigaku Corporation, “TAS-200”), and a thermogravimetric curve was drawn. It was determined by the arithmetic mean of the onset temperature and the final temperature.

[0082]

[Table 2]

From the results shown in Table 2, it is clear that the foamed refractory laminate according to the present invention has excellent weather resistance and also excellent heat resistance when exposed to high temperatures.

Example 9 A foamed refractory paint was produced using the foamed refractory material shown in Table 2 and based on Formulation Example 9 shown in Table 3. At the time of production, first put a binder and a solvent for dilution into a mixing and stirring tank, and while stirring and mixing with a dissolver,
After the other components such as a flame retardant, a foaming agent, a carbonizing agent, and a filler were sequentially added, when these components were uniformly mixed, stirring was stopped to obtain a foamed fire-resistant paint having a viscosity of 130 PS. .

Using a flow coater, the foamed refractory paint produced as described above was applied at a coating amount of 3 kg / m ² using a flow coater and cured and dried. The thickness of the main material layer formed of the foamed refractory paint was 1.5 mm. Next, on the surface of the foamed refractory main material layer, as a protective finish layer, a paint for forming a protective finish layer using the above-mentioned vinyl polymerizable fluororesin as a resin component ("Elastic Fussolon Enamel" manufactured by SK Chemical Co., Ltd.) 0.30kg /
After spray coating at m ² and drying and curing, the paper sheet was peeled off.

After the foamed fire-resistant laminated sheet produced in this manner was further cured for 2 weeks, it was subjected to JISK 5400 “General paint test method” 8.1 “Bending resistance test”.
mm, and when subjected to 5.3 “tensile performance” of JIS A 6021 “waterproofing material for roof”, the tensile strength was 118.
N / cm ² .

The foamed fire-resistant laminated adhesive sheet is formed by laminating an acrylic ester polymer-based pressure-sensitive adhesive on the surface opposite to the protective finish layer of the foamed fire-resistant laminated sheet so as to form an adhesive layer having a thickness of 250 μm. I got a sheet.

The foamed fire-resistant laminated pressure-sensitive adhesive sheet is 300 m
It was adhered to a hot rolled steel plate of mx 300 mm x 9 mm and cured for 2 weeks to obtain a test body. Example 1 of this specimen
As a result, the results shown in Table 2 were obtained.

Example 10 A foamed fire-resistant paint was produced in the same manner as in Example 9 based on Formulation Example 13 shown in Table 3.

Using a flow coater, the foamable refractory paint obtained was coated on a paper sheet surface with a coating amount of 3 kg.
/ M ² and cured and dried. The thickness of the main material layer formed of the foamed refractory paint was 1.5 mm.

Next, a coating for forming a protective finish layer ("Elastic Color Enamel" manufactured by SK Chemical Co., Ltd.) containing the acrylic resin as a resin component was applied as a protective finish layer on the surface of the main material layer. Spray coating at 0.30 kg / m ² ,
After drying and curing, the paper sheet was peeled off.

After the foamed fire-resistant laminated sheet thus produced was cured for 2 weeks, it was subjected to JIS K 5400 “8.1 General Test Method for Paints” 8.1 “Bending resistance test”.
And JIS A 6021 “Roof coating waterproofing material”.
3 When subjected to a “tensile performance test”, the tensile strength was 70 N
/ Cm ² .

The foamed fire-resistant laminated sheet obtained above was
30 spray-coated with a vinyl acetate-acrylate copolymer emulsion adhesive at a coating amount of 0.2 kg / m ² beforehand.
Affixed to a hot-rolled steel plate of 0 mm x 300 mm x 9 mm,
After curing for two weeks, a test body was prepared.

The same test as in Example 1 was performed on this test piece, and the results shown in Table 2 were obtained.

[0095]

[Table 3]

From the results shown in Table 2, it is clear that the foamed refractory laminate according to the present invention has excellent weather resistance and also excellent heat resistance when exposed to high temperatures.

Comparative Example 1 A test was conducted in the same manner as in Example 1 except that the protective finish layer was not formed. Table 4 shows the results.

Comparative Example 2 A test was performed in the same manner as in Example 2 except that the protective finishing layer in Example 2 was replaced with the above-mentioned finishing material 5. Table 4 shows the results.

Comparative Example 3 A test was conducted in the same manner as in Example 5 except that the protective finishing layer in Example 5 was replaced with the above-mentioned finishing material 6. Table 4 shows the results.

Comparative Examples 4 to 7 The procedure of Example 1 was repeated except that the composition examples shown in Tables 1 and 3 were used instead of the main material layer composition examples of Example 1 and the finish materials for forming the protective finish layer. A test body was produced in the same manner as in Example 1.

Table 4 shows the combinations of the main material layer and the protective finish layer in these test pieces and their performances.

Comparative Example 8 A test was performed in the same manner as in Example 8 except that the protective finish layer was not formed. Table 4 shows the results.

Comparative Example 9 Same as Example 9 except that Formulation Example 9 of the foamed refractory main material layer of Example 9 was changed to Formulation Example 6 of Table 1 and that the protective finish layer was changed to the finish material 6 described above. Then, a foamed fire-resistant laminated sheet is manufactured, and the JIS K 5400 “Coating General Test Method” 8.1 is used.
The result of JIS A
6021 was carried out the test 5.3 of the "tensile performance" of "roofing waterproofing membrane material", the tensile strength became 39N / cm ^2.

An acrylic acid ester polymer-based pressure-sensitive adhesive is laminated on the surface of the foamed fire-resistant laminated sheet opposite to the protective finish layer so as to form a pressure-sensitive adhesive layer having a thickness of 250 μm. I got a sheet.

The foamed fire-resistant laminated pressure-sensitive adhesive sheet was
2mm × 300mm × 9mm hot rolled steel plate
After curing for a week, a test body was prepared. When a test similar to that of Example 1 was performed on this test body, the results shown in Table 4 were obtained.

Comparative Example 10 The procedure of Example 10 was repeated, except that the foamed refractory main material layer formulation example 13 used in Example 10 was replaced with Formulation Example 12 in Table 3 and that no protective finish layer was formed. When a flexible sheet was manufactured and subjected to 8.1 “Bending resistance test” of JIS K 5400 “General paint test method”, it became 8 mm, and JIS A 60
A test of 5.3 “tensile performance” of 21 “waterproofing material for roof” showed a tensile strength of 118 N / cm ² .

This foamed refractory sheet was spray-coated with a vinyl acetate-acrylate copolymer emulsion adhesive at a coating amount of 0.2 kg / m ² in advance by 300 mm × 300 mm.
A test piece was prepared by adhering to a hot-rolled steel sheet having a size of 9 mm × 9 mm and curing for 2 weeks.

The same test as in Example 1 was performed on this test piece, and the results were as shown in Table 4.

[0109]

[Table 4]

From the results shown in Table 4, when the combination of the main material layer and the protective finish layer according to the present invention was not employed, the foamed refractory main material layer was inferior in weather resistance, and as a result, was exposed to high temperatures. It is clear that the heat resistance in the case is also very poor.

Example 11 Using a flow coater, the foamed fire-resistant paint according to Formulation Example 9 in Table 9 prepared in Example 9 was applied at a coating amount of 3 kg / m ² using a flow coater. After curing and drying, the paper sheet was peeled off. The film thickness of the foamed refractory paint sheet thus produced was 1.5 mm.

An acrylic acid ester polymer-based pressure-sensitive adhesive was laminated on the surface of the foamed fire-resistant paint sheet so as to form a pressure-sensitive adhesive layer having a thickness of 250 μm to obtain a foamed fire-resistant pressure-sensitive adhesive sheet.

The foamed fire-resistant pressure-sensitive adhesive sheet thus obtained was adhered to the edge of an H-shaped steel as shown in FIG. 7, and then the entire surface including the web, the flange and the surface of the sheet was mixed as shown in Table 1. The foamed refractory paint prepared in Example 3 was applied at a coating amount of 3 kg / m ² , and a finishing material 4 (“Elastic Fussolon Enamel” manufactured by SK Chemical Co., Ltd.) shown in Table 2 was further applied as a protective finishing layer. A spray was applied at a coating weight of 0.30 kg / m ^{2 and} cured for 2 weeks to prepare a test body.

Next, JIS A 1304, “Fire resistance test method for building structural parts”, 4. When the above test specimen was heated and heated in a heating furnace based on the standard curve prescribed in “Heating Grade Attached Figure 1”, the foamed carbonized heat insulating layer was uniformly foamed even at the edge part, No cracks or peeling occurred. Therefore, when the foamed fire-resistant pressure-sensitive adhesive sheet according to the present invention is used, the foamed fire-resistant layer can be formed without requiring special care for making the thickness of the edge portion of the H-shaped steel uniform. .

[0115]

According to the present invention, deterioration of the main material layer is prevented by laminating a protective finish layer having excellent weather resistance on the main material layer made of a foamed refractory paint having poor durability. Even if a fire occurs after a long period of time, the desired fire resistance performance can be exhibited.

Further, by laminating a colored layer as the protective finish layer, various colors and patterns can be imparted to the entire coating film without coloring the foamed refractory paint itself forming the main material layer. In addition, the appearance of the structure can be given an aesthetic appeal as compared with a tasteless refractory coating.

Further, in the event of a fire, the protective finishing material layer is thermally decomposed at a lower temperature than the foamed refractory main material layer. The desired high level of fire resistance can be exhibited without any hindrance.

Further, since the foamed refractory paint exhibits fire resistance performance due to the thickness of the foamed carbonized heat insulating layer formed from the main material layer at the time of fire, conventionally, the foamed refractory paint which substantially forms the main material layer is used. The fire resistance in the event of a fire is defined by the amount of paint sprayed. And it was extremely difficult even for a skilled worker to make the spray application uniform and constant. On the other hand, when a laminate of the main material layer made of the foamed refractory paint of the present invention and the protective finish is formed in a sheet shape in advance, the thickness of the main material layer can be made constant. Therefore, it is possible to eliminate the difficulty of controlling the coating amount or uniform application when spraying the foamed refractory paint in the prior art. Therefore, by adhering the sheet-like laminate having a constant thickness to a predetermined protected portion, a predetermined fireproof performance can always be obtained by a simple operation.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a laminated structure in which a main material layer made of a foamed refractory paint is applied to an object to be protected, and a protective finish layer is further applied.

FIG. 2 is a sectional view showing a foamed fire-resistant laminated sheet obtained by laminating a main material layer made of a foamed fire-resistant paint and a protective finish layer.

FIG. 3 is a cross-sectional view showing a foamed fire-resistant laminated pressure-sensitive adhesive sheet obtained by laminating a protective finish layer and a pressure-sensitive adhesive layer on a main material layer made of a foamed fire-resistant paint.

FIG. 4 is a sectional view showing a foamed refractory material sheet obtained by molding only a foamed refractory material into a sheet.

FIG. 5 is a cross-sectional view showing a foamed refractory material pressure-sensitive adhesive sheet formed by laminating a pressure-sensitive adhesive layer on a main material layer made of a foamed refractory material and forming the same into a sheet shape.

FIG. 6 is a cross-sectional view showing a method for filling a gap with a foamed refractory paint when bonding a plurality of foamed refractory material sheets.

FIG. 7 is a cross-sectional view showing a method of processing an edge portion of an H-shaped steel using a foamed refractory material adhesive sheet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Protected object 2 ... Foamed refractory paint 3 ... Protective finish paint 4 ... Main material layer made of foamed refractory material 5 ... Protective finish layer 6 ... Adhesive layer 7 ... H-shaped steel

Continued on the front page (72) Inventor Takeshi Fujiwara 1-25-10 Shimizu, Ibaraki-shi, Osaka SK Kaken Co., Ltd. Research Institute (72) Inventor Tomio Ouchi 2-9-1-1, Tobita-shi, Chofu-shi, Tokyo Shika Inside the Technical Research Institute of Shima Construction Co., Ltd. (72) Keiichi Miyamoto Inventor, Keiichi Miyata 2-9-1-1, Kabushiki Kaisha Technical Research Institute (56) References JP-A-5-86310 (JP, A) JP-A-6-55680 (JP, A) JP-A-5-194881 (JP, A) JP-A-5-110919 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B32B 1 / 00-35/00 E04B 1/62-1/99 C09D 1/00-201/10

Claims (3)

(57) [Claims] 1. After foaming, after applying an adhesive to a frame to which fire resistance is to be imparted, foaming occurs when the surrounding temperature reaches a predetermined foaming temperature due to a fire, thereby generating nonflammable gas and forming a carbonized heat insulating layer. A fire-resistant sheet is adhered, and furthermore, the foamed fire-resistant sheet is protected in a normal state, and a protective finish layer which is thermally decomposed at a temperature lower than the foaming temperature of the foamed fire-resistant sheet in a fire is formed. A method for forming a foamed refractory coating. 2. An adhesive comprising a main material layer which foams when the ambient temperature reaches a predetermined foaming temperature due to a fire and generates a nonflammable gas and forms a carbonized heat insulating layer. After peeling off the peelable sheet of the foamed fire-resistant material pressure-sensitive adhesive sheet obtained by laminating the layers, it is adhered to the frame to be provided with fire resistance through the pressure-sensitive adhesive layer, and furthermore, under normal conditions, the foamed fire-resistant material sheet And forming a protective finish layer which is thermally decomposed below the foaming temperature of the foamed refractory material sheet in the event of a fire. 3. The method according to claim 1 or 2 , wherein
After a plurality of foamed refractory material sheets or foamed refractory material adhesive sheets are adhered to the frame, foaming occurs when the surrounding temperature reaches a predetermined foaming temperature due to a fire at the bonded part of the multiple sheets, and it is nonflammable. Filling and applying a foamed refractory paint for generating gas and forming a carbonized heat-insulating layer, further protects the foamed refractory material sheet or the foamed refractory material adhesive sheet in a normal state, and the foamed refractory material sheet in a fire Alternatively, a method for forming a foamed refractory coating, which comprises applying a protective finish layer which thermally decomposes at a temperature lower than the foaming temperature of the foamed refractory material pressure-sensitive adhesive sheet to the entire surface of the frame.