JPH10237981A - Fire resistant covering execution method of long fire resistant covering material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve execution by covering the surface of a long fire resistant covering material so as to butt and connect adjacent side end edge faces by means of a fire resistant sheet having adherent force. SOLUTION: A fire resistant sheet 12 composed of material containing heat expansion graphite neutralizing non-vulcanized butyl rubber with phosphide and an inorganic filler is prepared to be wound in the form of a roll. Next, the sheet 12 is covered along the peripheral direction of the surface of an H- shape steel frame 11. A fire resistant sheet 13 of the same material is covered along the peripheral direction of the surface of the H-shape steel frame 11 on a part adjacent to another part covering the sheet 12. The connecting side end edge faces are butted and joined. Successively, the surface of the H-shape steel frame 11 is fire-resistant-covered by the same process, and a fire resistant covering steel frame is obtained. Thus, a fire resistant covering layer, which has uniform thickness with good execution, composed of the fire resistant sheet having incombustibility can be formed on the surface of a long fire resistant covering material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for applying a fireproof coating to a long fireproof coating such as a steel frame.

[0002]

2. Description of the Related Art Conventionally, as a simple method of refractory coating of a steel frame, a method in which rock wool or the like is blown irregularly onto the surface of a steel frame is known, but rock wool is sprayed to a required thickness. Construction management is difficult,
In addition, there is a disadvantage that the working environment of the spraying operation is poor.

[0003] As described in Japanese Patent Publication No. 37215/1976, a wet fiber felt mainly composed of inorganic fibers and impregnated with colloidal silica is used.
A method has been proposed in which the fiber felt material in a wet state is attached to a steel frame surface, dried and cured to form a heat-resistant coating layer. However, in the case of this method, there is a problem that a process of attaching a wet fiber felt material to a steel frame surface and drying and curing the same is complicated, resulting in poor workability.

[0004] As a steel frame refractory coating structure, for example,
As shown in FIG. 2, a steel material (through material) b is directly attached to a steel beam a, a backing material c is attached at predetermined intervals on the steel material b, and an inorganic fiber reinforced gypsum board d is attached to the backing material c. An inorganic fiber reinforced gypsum boat-coated hollow steel beam (fire-resistant G1064) or a Japanese Patent Publication No. 4-3, Showa
As described in Japanese Patent Application Laid-Open No. 8260, there is known a structure in which a fireproof board is attached to a steel frame via an attachment member, a rod-shaped member, or the like. However, in the case of such a steel frame refractory coating structure, there is a disadvantage that the number of construction steps is increased, and the coating thickness is increased by the amount of the backing material, the mounting member, and the like.

As shown in FIG. 3, a rock wool heat insulating plate j is wound around the surface of a steel frame i, and a refractory coating material k made of a ceramic fiber blanket or the like is laminated and coated so as to partially overlap each other. , Ceramic fiber blanket, etc. laminated steel beam (fireproof G
1066) are known. However, even in the case of such a steel frame refractory coating structure, there is a problem that a part that is partially overlapped becomes thick, which is not preferable.

[0006]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems, and provides a surface of a long fire-resistant coating material,
An object of the present invention is to provide a method for performing a fireproof coating of a long fireproof coating material, which can form a fireproof coating layer having good workability, uniform thickness, and flame retardancy.

[0007]

According to the first aspect of the present invention, the surface of a long fire-resistant covering material is coated on a surface of a long fire-resistant covering material by using a fire-resistant sheet having adhesive strength. This is a method for applying a fire-resistant coating to a long fire-resistant coating material, which is coated by joining the edge surfaces together.

The invention described in claim 2 of the present application (Invention 2)
The long fire-resistant coating material according to the first aspect of the present invention, wherein the fire-resistant sheet having tackiness is made of a material containing a phosphorus compound, neutralized heat-expandable graphite, and an inorganic filler in a non-vulcanized rubber. This is the method of applying the refractory coating.

The invention described in claim 3 of the present application (Invention 3)
Is a method for constructing a fireproof coating of a long fireproof covering material according to the first or second invention, wherein the long fireproof covering material is a steel frame.

[0010] In the present invention, the fire-resistant sheet having tackiness includes a non-vulcanized rubber made of a material containing a phosphorus compound, neutralized thermally expandable graphite and an inorganic filler, and a ceramic fiber sheet. Those obtained by laminating a non-vulcanized rubber and the like are preferably used.

The non-vulcanized rubber is not particularly limited. For example, natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), 1,2-polybutadiene rubber (1,2-BR), styrene -Butazine rubber (SB
R), chloroprene rubber (CR), nitrile rubber (NB
R), butyl rubber (IIR), ethylene-propylene rubber (EPM, EPDM), chlorosulfonated polyethylene (CSM), acrylic rubber (ACM, ANM), epichlorohydrin rubber (CO, ECO), multi-vulcanized rubber (T), silicone Rubber (Q), Fluororubber (FKM,
FZ), urethane rubber (U) and the like. These may be vulcanized after the addition of the phosphorus compound, graphite and inorganic filler.

The fire-resistant performance of the fire-resistant sheet of the present invention is exhibited when these three components exhibit their respective properties. Specifically, at the time of heating, the heat-expandable graphite forms an expanded heat-insulating layer to prevent the transfer of heat. The inorganic filler is
At that time, the heat capacity is increased, and the phosphorus compound has a shape retaining ability of the expanded heat insulating layer and the filler.

The above phosphorus compound is not particularly limited.
For example, red phosphorus; various phosphates such as triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, xylendiphenyl phosphate; phosphorus such as sodium phosphate, potassium phosphate, and magnesium phosphate Acid metal salts; ammonium polyphosphates; and compounds represented by the following general formula (1). Among them, ammonium polyphosphates; compounds represented by the following general formula (1) are preferable.

[0014]

Embedded image

In the formula, R ₁ and R ₃ are hydrogen, C ₁ -C 1
6 represents a linear or branched alkyl group or an aryl group having 6 to 16 carbon atoms. R ₂ is a hydroxyl group, a linear or branched alkyl group having 1 to 16 carbon atoms, a linear or branched alkoxyl group having 1 to 16 carbon atoms, an aryl group having 6 to 16 carbon atoms, Represents an aryloxy group represented by Formulas 6 to 16.

As the above-mentioned red phosphorus, commercially available red phosphorus can be used, but from the viewpoints of moisture resistance, safety such as not spontaneously igniting during kneading, etc., those obtained by coating the surface of red phosphorus particles with a resin are preferred. .

The above ammonium polyphosphates include:
For example, ammonium polyphosphate, melamine-modified ammonium polyphosphate and the like can be mentioned. Commercially available products include “AP462” manufactured by Hoechst and “Sumisafe P” manufactured by Sumitomo Chemical Co., Ltd.

The compound represented by the above general formula (1) includes, for example, methylphosphonic acid, dimethyl methylphosphonate, diethyl methylphosphonate, ethylphosphonic acid,
Propylphosphonic acid, butylphosphonic acid, 2-methylpropylphosphonic acid, t-butylphosphonic acid, 2,3-dimethyl-butylphosphonic acid, octylphosphonic acid, phenylphosphonic acid, dioctylphenylphosphonate, dimethylphosphinic acid, methylethylphosphine Examples include acid, methylpropylphosphinic acid, diethylphosphinic acid, dioctylphosphinic acid, phenylphosphinic acid, diethylphenylphosphinic acid, diphenylphosphinic acid, and bis (4-methoxyphenyl) phosphinic acid. The above phosphorus compounds may be used alone or in combination of two or more.

As the heat-expandable graphite, conventionally known substances can be used. For example, powders such as natural scaly graphite, pyrolytic graphite, quiche graphite and the like are mixed with an inorganic acid such as concentrated sulfuric acid, nitric acid and selenic acid and concentrated nitric acid. Treated with a strong oxidizing agent such as perchloric acid, perchlorate, permanganate, dichromate, hydrogen peroxide, etc. to produce a graphite intercalation compound, maintaining a carbon layered structure Crystalline compounds as they are.

The heat-expandable graphite obtained by the acid treatment as described above is further neutralized with ammonia, a lower aliphatic amine, an alkali metal compound, an alkaline earth metal compound, or the like. Examples of the aliphatic lower amine include monomethylamine, dimethylamine, trimethylamine, ethylamine, propylamine, butylamine and the like. As the alkali metal compound and the alkaline earth metal compound, for example, hydroxides, oxides, carbonates such as potassium, sodium, calcium, barium, magnesium,
Sulfate, organic acid salt and the like can be mentioned. Specific examples of the thermally expandable graphite thus neutralized include, for example, CA-6.
OS (manufactured by Nippon Kasei Co., Ltd.) and the like.

The particle size of the neutralized heat-expandable graphite is 2
Those having 0 to 200 mesh are preferable. If the particle size is smaller than 200 mesh, the degree of expansion of graphite is small, the desired refractory insulation layer cannot be obtained, and if the particle size is larger than 20 mesh,
Although it has an effect in that the degree of swelling is large, when kneading with a resin, the dispersibility is poor and physical properties cannot be avoided.

The inorganic filler is not particularly limited. For example, silica, diatomaceous earth, alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, ferrites, calcium hydroxide, water Magnesium oxide, aluminum hydroxide, basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, barium carbonate, dawnite, hydrotalcite, calcium sulfate, barium sulfate, gypsum fiber, calcium silicate, talc, clay, mica, Montmorillonite, bentonite, activated clay, sepiolite, imogolite, sericite, glass fiber, glass beads, silica balun, aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balun, charcoal powder Various metal powders, potassium titanate, magnesium sulfate "MOS", lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powder,
Slag fibers, fly ash, dewatered sludge, and the like are included. Among them, it is preferable to use a water-containing inorganic substance such as calcium hydroxide, magnesium hydroxide, or aluminum hydroxide, which is dehydrated during heating and has an endothermic effect.

As a material for forming the refractory sheet, the total amount of the phosphorus compound and the neutralized thermally expandable graphite is 20 to 2 parts by weight based on 100 parts by weight of the non-vulcanized rubber.
Preferably, the inorganic filler is contained in an amount of 50 to 500 parts by weight. If the total amount of the phosphorus compound and the neutralized heat-expandable graphite is less than 20 parts by weight, sufficient fire resistance cannot be obtained. Become. If the amount of the inorganic filler is less than 50 parts by weight, sufficient fire resistance cannot be obtained,
If it exceeds 500 parts by weight, mechanical properties are greatly reduced.

In the present invention, the combination of the neutralized heat-expandable graphite and the phosphorus compound suppresses the explosion of the expandable graphite during combustion and maintains the shape, and the amount of the heat-expandable graphite is too large. When the graphite expanded during combustion is scattered, a sufficient heat-insulating layer cannot be obtained at the time of heating, and conversely, if there is too much phosphorus compound, the heat-insulating layer is not sufficient and the desired effect cannot be obtained. The weight ratio of the treated heat-expandable graphite to the phosphorus compound is preferably from 9: 1 to 1: 9 for the neutralized heat-expandable graphite: phosphorus compound. More preferably, it is 5: 1 to 1: 5, and further preferably, it is 3: 1 to 1: 3.

In the present invention, the material for forming the refractory sheet may further include, as long as the physical properties of the refractory layer are not impaired,
A phenol-based, amine-based, sulfur-based antioxidant, metal harm inhibitor, antistatic agent, stabilizer, crosslinking agent, lubricant, softener, pigment, and the like may be added.

The material for forming the refractory sheet can be obtained by kneading each component with a kneading device such as a single screw extruder, a twin screw extruder, a Banbury mixer, a kneader mixer and a roll.

[0027]

According to a first aspect of the present invention, there is provided a method for applying a fire-resistant coating to a long fire-resistant coating material, wherein the surface of the long fire-resistant coating material is coated with a fire-resistant sheet having an adhesive strength so that adjacent side edge surfaces thereof are bonded to each other. By butt-joining and coating, a fire-resistant sheet can be stuck to the surface of a long fire-resistant coating material with good workability without unevenness in thickness, and the fire-resistant sheet burns in the event of a fire Hard to do.

According to a second aspect of the present invention, there is provided a method for applying a fire-resistant coating to a long fire-resistant coating material according to the first aspect of the present invention, wherein the heat-resistant sheet having an adhesive property is obtained by neutralizing a non-vulcanized rubber with a phosphorus compound. By using a material containing graphite and an inorganic filler, it is difficult to burn in the event of a fire, has sufficient shape-retaining ability, and the temperature of the surface of the long fire-resistant coating material is equal to or higher than a predetermined temperature. No remarkable fire resistance performance.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view illustrating an example of a method for applying a fireproof coating to a long fireproof coating material of the present invention.

First, as shown in FIG. 1A, a first refractory non-vulcanized non-vulcanized butyl rubber made of a material containing a phosphorus compound, neutralized heat-expandable graphite and an inorganic filler is used. A butyl rubber sheet (hereinafter, referred to as a refractory sheet) wound in a roll is prepared.

Next, as shown in FIG. 1B, a part of the surface of the H-shaped steel frame 11 is coated with a first refractory sheet 12 along the circumferential direction.

Next, as shown in FIG. 1C, a similar material is formed along a circumferential direction on a portion of the surface of the H-shaped steel frame 11 adjacent to the portion covered with the first refractory sheet 12. Is covered with a second refractory sheet 13 made of. Then, the connected side edge surfaces are joined to each other.

In the same manner as described above, the surface of the H-shaped steel frame 11 is integrally coated with a fire-resistant sheet using a fire-resistant sheet to obtain a fire-resistant coated steel frame.

[0034]

EXAMPLES The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

Example 100 parts by weight of butyl rubber [isobutylene / isoprene rubber having a Mooney viscosity (100 ° C.) of 47 and an unsaturation of 2.0] were neutralized with heat-expandable graphite (CA-60S,
Using a double roll, 30 parts by weight of Nippon Kasei Co., 20 parts by weight of ammonium polyphosphate (Sumisafe P, manufactured by Sumitomo Chemical Co., Ltd.) and 150 parts by weight of aluminum hydroxide (B703S, manufactured by Nippon Light Metal Co., Ltd.) were added. The mixture was melt-kneaded to prepare a fire-resistant sheet made of a fire-resistant non-vulcanized butyl rubber sheet having a thickness of 5 mm.

As described with reference to FIG. 1, the surface of the H-shaped steel frame 12 is integrally coated with the refractory sheets 12 and 13 such that the connected side edge surfaces are joined to each other. Thus, a fire-resistant coated steel frame was obtained.

The fire resistance was evaluated in accordance with JIS A1304. As a result of heating for 1 hour based on the heating curve, the temperature of the surface of the steel frame was 350 ° C. or less on average.

[0038]

As described above, the method for applying a fire-resistant coating on a long fire-resistant coating material according to the present invention is as described above. A fire-resistant coating layer made of a fire-resistant sheet having flame retardancy can be formed.

When the refractory sheet is made of a material containing a non-vulcanized rubber, a phosphorus compound, a neutralized heat-expandable graphite and an inorganic filler, it is difficult to burn in a fire, and it is not sufficient. It has a shape retention ability and can exhibit remarkable fire resistance performance in which the temperature of the surface of the long fire-resistant coating material does not exceed a predetermined temperature.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of an example of a method for applying a fireproof coating to a long fireproof coating material of the present invention. FIG. 1 (a) is a perspective view showing a fireproof sheet used in the present invention wound in a roll shape. , (B)
FIG. 2 is a perspective view showing a state in which a part of the surface of the H-shaped steel frame is covered with a first refractory sheet along a circumferential direction, and FIG. 3C is a view in which the first fire-resistant sheet on the surface of the H-shaped steel frame is covered. FIG. 10 is a perspective view showing a state in which a portion adjacent to the portion covered with a second refractory sheet made of a similar material is circumferentially covered.

FIGS. 2A and 2B are explanatory views showing an example of a conventional steel frame refractory coating structure, wherein FIG. 2A is a perspective view and FIG.

FIG. 3 is a cross-sectional view showing another example of a conventional steel frame refractory coating structure.

[Description of Signs] 11 H-type steel frame (long fire-resistant covering material) 12 First fire-resistant sheet 13 Second fire-resistant sheet

Claims (3)

[Claims] The present invention is characterized in that the surface of a long fire-resistant coating material is coated by using a fire-resistant sheet having adhesive strength so that adjacent side edge surfaces are joined to each other. The method of applying fireproof coating to the shading fireproof coating material. 2. The adhesive refractory sheet is made of a material containing non-vulcanized rubber containing a phosphorus compound, neutralized heat-expandable graphite and an inorganic filler. The method for applying a fireproof coating of the long fireproof coating material described in the above. 3. The method according to claim 1, wherein the long fire-resistant covering material is a steel frame.