WO2013141367A1

WO2013141367A1 - Fire-extinguishing agent

Info

Publication number: WO2013141367A1
Application number: PCT/JP2013/058316
Authority: WO
Inventors: 真司岩本; 啓彦大庭; 栄治三木; 英順用瀬; 鈴木　裕; 浩三栗田; 奥崎　秀典
Original assignee: 株式会社古河テクノマテリアル; 古河電気工業株式会社; 国立大学法人山梨大学
Priority date: 2012-03-23
Filing date: 2013-03-22
Publication date: 2013-09-26
Also published as: JPWO2013141367A1; JP5469283B1

Abstract

A fire-extinguishing agent which comprises crude guar gum and further contains at least one saccharide selected from monosaccharides and oligosaccharides as a dispersion aid for the crude guar gum, wherein the monosaccharide(s) and oligosaccharide(s) are contained in a total amount of 30-400 parts by mass per 100 parts by mass of the crude guar gum.

Description

Fire extinguisher

The present invention relates to a extinguishant. More specifically, the present invention relates to a fire extinguishing agent suitable for rapid preparation of fire extinguishing water having good water dispersibility and dispersion stability and excellent fire extinguishing performance.

Usually, in the case of fire, extinguish work using water (water for fire extinguishing). Water has a high specific heat and high heat of vaporization, so it has a high cooling effect, and it effectively extinguishes heat from the combustibles and combustibles to prevent extinguishing or burning. However, water has a high surface tension and is likely to fall and be washed away without staying on the surface of the combustible or combustible material. Of the water used for fire fighting, it is said that about 10% actually contribute to fire fighting. Therefore, in order to extinguish fires, it is necessary to continuously discharge water for a long time, so a large amount of water is required. In addition, in order to extinguish the fire of high-rise buildings, for example, when the fire of a high-rise building is extinguished, the inflow of water into the lower layer of the building and the adjacent area / building or the water And other problems that cause secondary damage.

On the other hand, the amount of water resources may be limited near the fire site. For example, in forest field fires, etc., it is often impossible to secure sufficient water for fire extinguishing. In this case, it is particularly desirable to efficiently contribute a limited amount of water to extinguishing.

Heretofore, the following water-added extinguishing agents have been developed to enhance the extinguishing action of water.
(A) Phosphate inorganic compound fire extinguisher Usually, ammonium phosphate is contained as a main component. When fire extinguishing water containing a phosphate inorganic compound-based fire extinguishing agent is sprayed to the fire area, the ammonium phosphate is decomposed by heating, and the heat absorption effect thereby deprives surrounding heat. In addition, noncombustible gas is generated to form a gas layer around it to block oxygen, and when the temperature is further increased, it changes to a molten glass shape and coats the combustion surface to block oxygen.

However, in order to add the phosphate inorganic compound-based extinguishant to enhance the extinguishing action of the extinguishing water, it is necessary to add a large amount of the extinguishant to the water. Furthermore, since phosphate inorganic compounds are hardly soluble in water, they tend to form a continuous powder (Mamako). Here, the powder is a lump which is not dispersed or dissolved in the liquid when the powder is charged into the liquid and is aggregated, and has a structure in which the powder is wrapped in an outer layer swollen with the liquid. It is also called dama, and once formed, it becomes difficult to dissolve even if the entire aggregate swells with liquid.
Moreover, since the phosphate mineral compound stored for a long period of time precipitates into a mass and becomes a mass, an apparatus for pulverizing this is required at the time of use. The fact that the phosphate inorganic compound is difficult to dissolve in water also causes a problem that it takes time and effort to wash materials and equipment. Furthermore, since the ammonium phosphate is similar to the component used for fertilizers, it is pointed out that there are environmental problems that cause the eutrophication phenomenon in the sprayed soil.

(B) Synthetic surfactant-based fire extinguishing agent As the main component is synthetic surfactant, fire extinguishing water containing synthetic surfactant-based fire extinguishing agent has low surface tension and penetrates into fire extinguishing objects such as burnables and combustibles. Cheap. Moreover, the foam formed by the impact which collided covers a combustion thing and a combustible thing, and the effect of fire-extinguishing / re-fire prevention / fire spread suppression improves by shielding oxygen and cutting off. Since the concentration of the surfactant type fire extinguishant added to water is low, and the fire extinguishing water can be prepared by adding only the fire extinguishing agent to the water, the extinguishing water can be prepared relatively quickly.

However, especially when using a helicopter or aircraft to discharge (spray) the air from above the fire, fire extinguishing water containing synthetic surfactant fire extinguishing agents is likely to generate air bubbles due to air resistance and rise due to fire There is a problem that the air flow and the air flow generated by the flight of the aircraft itself such as a helicopter, a flying boat, and an airplane cause the diffusion and disappearance, and the extinguishing water is difficult to reach the targeted point.
In addition, since synthetic surfactant fire extinguishing agents require the formation of bubbles to obtain the intended extinguishing action, it is necessary to increase the amount added to water to the concentration at which they form bubbles, such concentration In the case of, the toxicity to aquatic organisms is a concern.

In addition, even after reaching the fire extinguishing target, when the temperature of the fire extinguishing water is low, bubbles are difficult to be generated, and when the temperature is high, the bubbles disappear quickly, and the desired performance may not be exhibited.

(C) Water-absorbing polymer fire extinguishing agent A water-absorbing polymer containing water-absorbing polymer as a main component and sufficiently absorbing water is brought into contact with a combustible or combustible material to exhibit fire extinguishing, reburning prevention, and fire spread suppressing effect. .

However, fire extinguishing water containing water-absorbing polymer fire extinguishing agents has relatively weak penetration, so it is difficult for the fire extinguishing water to spread from the attached part to the surroundings, and the fire extinguishing, relapse prevention and fire spread suppressing effects to the surroundings are expected very much Can not. In addition, the water-absorbing polymer causes the foot to slip during work such as after-fire treatment and on-site investigations.
In addition, it has been pointed out that water-absorbing polymers are difficult to biodegrade and accumulate in the environment to adversely affect ecosystems.

In addition, since water-absorbing polymers such as polyacrylates are susceptible to the influence of ion concentration in the solvent and the water-absorbing properties deteriorate, the use concentration is considerably increased to obtain sufficient performance when using hard water or seawater There is a need.

(D) Thickener-type fire extinguishing agent It has also been reported that the fire extinguishing performance is enhanced by imparting thickening property to water for fire extinguishing (for example, Patent Documents 1 to 3). In

patent documents

1 and 2, while adding a thickening effect to fire extinguishing water, the fire extinguishing / fire spread prevention performance of fire extinguishing water is improved by containing carbonization components, such as starch, further. Moreover, in patent document 3, the water for fire extinguishing is made to contain a metal ion crosslinking agent with a thickener.

However, in order to prepare the fire extinguishing water in which the thickener is uniformly dispersed, it is necessary to divide it into several steps and mix it with the water, so the inventions described in Patent Documents 1 to 3 are for rapid preparation of the fire extinguishing water. It is not suitable. In addition, if the fire extinguishing water is not prepared according to the procedure, there is a concern that the components may not be completely dissolved and may become a continuous powder. In particular, in the case of using a high viscosity polysaccharide, the thickener may form a continuous powder when it is added to water, and it may not be possible to impart the effect expected as fire extinguishing water.

U.S. Patent Application Publication No. US2006 / 0076531 JP 2009-533118 gazette U.S. Patent Application Publication No. US2009 / 0212251

An object of the present invention is to provide a fire extinguishing agent suitable for rapid preparation of fire extinguishing water which is highly dispersible in water and exhibits viscosity or pseudoplasticity.
Moreover, this invention makes it a subject to provide the method of preparing fire extinguishing water using the said fire extinguisher, and extinguishing a fire using this.

The present inventors diligently studied in view of the above problems. As a result, a specific material is adopted as a source of the polymer compound necessary for the development of viscosity or pseudoplasticity, and a mixture containing this material and a specific substance which promotes the dispersion of the material is dispersed in water. It was found that water having excellent properties and in which the mixture was dispersed exhibited excellent performance as fire extinguishing water. The present invention has been completed based on these findings.
Here, pseudo plasticity refers to one of the parameters showing the shear rate dependency of viscosity, and is a property in which the viscosity decreases as the shear rate increases. It is also called pseudoplasticity, shear thinning property, and the like.

The object of the present invention is achieved by the following means.
<1> A fire extinguishing agent containing crude guar gum and further containing at least one selected from monosaccharides and oligosaccharides as a dispersion aid for crude guar gum, wherein the monosaccharide and the saccharide are based on 100 parts by mass of crude guar gum A fire extinguishing agent containing 30 to 400 parts by mass in total of oligosaccharides.
The fire extinguisher as described in <1> which contains at least 1 sort (s) chosen from the group which consists of inorganic sodium salt, inorganic potassium salt, ammonium salt, and a foaming agent further as a dispersion aid of <2> crude guar gum.
The fire extinguishing agent according to <2>, wherein the inorganic sodium salt, the inorganic potassium salt, the ammonium salt and the foaming agent are contained in a total amount of 50 to 200 parts by mass with respect to 100 parts by mass of <3> crude guar gum.
<4> A foaming agent obtained by combining sodium hydrogencarbonate and at least one organic acid selected from the group consisting of citric acid, fumaric acid, succinic acid and malic acid, ammonium hydrogencarbonate and citric acid It is selected from the group consisting of a foaming agent comprising a combination of at least one organic acid selected from the group consisting of an acid, fumaric acid, succinic acid and malic acid, and a foaming agent comprising a combination of sodium nitrite and ammonium chloride. The fire extinguisher as described in <2> or <3> which is at least 1 type of foaming agent.
The fire extinguisher as described in any one of <1>-<4> which contains at least 1 sort (s) chosen from sucrose and top white sugar as a dispersion | distribution adjuvant of <5> crude guar gum.
The fire extinguisher according to any one of <1> to <5>, which comprises 5 to 75 parts by mass of a water-soluble high molecular weight polysaccharide other than guar gum derived from crude guar gum per 100 parts by mass of <6> crude guar gum Agent.
The fire extinguisher according to <6>, wherein the water-soluble polymer polysaccharide other than guar gum derived from <7> crude guar gum is at least one selected from the group consisting of tamarind seed gum, alginic acid ester, xanthan gum and pullulan.
The fire extinguisher as described in <6> or <7> in which water soluble high molecular polysaccharides other than guar gum derived from <8> crude guar gum are coated with surfactant.
<9> The fire extinguisher as described in any one of <1> to <8>, wherein crude guar gum is coated with a surfactant.
The fire extinguisher as described in any one of <1>-<9> containing at least 1 sort (s) of surfactant selected from the group which consists of <10> anionic surfactant and nonionic surfactant.
The <11> anionic surfactant is at least one member selected from the group consisting of α-olefin sulfonate, alkyl sulfate, polyoxyethylene alkyl ether sulfate and N-acyl taurine salt, and nonionic surfactant The fire extinguisher according to <10>, wherein the agent is at least one selected from the group consisting of polyoxyethylene alkyl ether, sucrose fatty acid ester and glycerin fatty acid ester.
The fire extinguisher according to any one of <1> to <11>, which contains at least one selected from the group consisting of a colorant, an antifreeze, an antioxidant, a corrosion inhibitor, and a fungicide.
The fire extinguisher according to any one of <1> to <12>, which is in the form of granules or tablets.
The fire extinguisher as described in any one of <1>-<13> which does not contain a <14> starch.
A method for preparing extinguishing water, comprising the steps of dispersing and dissolving the extinguishant described in any one of <15><1> to <14> in water.
The fire extinguishing method of the fire including the process of discharging the water for fire extinguishing prepared by the preparation method of the fire extinguishing water as described in <16><15> to a fire site.

The extinguishant of the present invention is excellent in dispersibility in water. By dispersing the extinguishant of the present invention in water, extinguishing water having appropriate viscosity can be prepared. This fire extinguishing water does not diffuse excessively when discharged. That is, the fire extinguishing water can be more efficiently sent to the fire site with a small amount of water discharge. Further, due to its pseudoplastic nature, the fire extinguishing water spatters and diffuses appropriately when it collides with a combustible or combustible, and it hardly flows off after adhering to the combustible or combustible. Therefore, the fire extinguishing efficiency is higher.

According to the fire extinguishing method of the present invention, the fire can be efficiently extinguished with less water discharge. Therefore, it is possible to efficiently extinguish the fire using the limited amount of water resources at the fire site, and at the same time, it is possible to further suppress the secondary damage caused by the extinguishing water discharged.

The above and other features and advantages of the present invention will become more apparent from the following description with reference to the accompanying drawings as appropriate.

It is a schematic diagram which shows arrangement | positioning (FIG. 1 a) of the wood piece used in the Example, and the usage aspect (FIG. 1 b) of a wood piece. It is a graph which shows the relationship between the adhesion amount to the wood piece of fire extinguishing water, and the burning speed of the said wood piece.

Hereinafter, the present invention will be described in detail based on its preferred embodiments.

<Fire extinguishing agent of the present invention>
The fire extinguishing agent of the present invention contains at least a crude guar gum having a thickening action and a dispersion aid which promotes the dispersion of the crude guar gum in water.
The extinguishant of the present invention is used for the purpose of preparing extinguishing water by dispersing it in water.

[Crude Guar Gum]
The crude guar gum used for the fire extinguishing agent of the present invention is a powder preparation obtained by crushing the endosperm part of guar, which is a leguminous plant, or a partially purified product thereof. including. In the present invention, "crude guar gum" refers to guar gum whose polysaccharide content in its dry matter is less than 95% by mass.
The mass of crude guar gum dry matter is a value obtained by measuring the water content of crude guar gum and subtracting the water content from the mass of crude guar gum. Also, the water content of crude guar gum can be measured by Karl Fischer moisture meter (coulometric titration or volumetric titration). The moisture meter is available, for example, from Mitsubishi Chemical Analytech.
Furthermore, in the present specification, the amount of polysaccharide in crude guar gum is the drying under reduced pressure, the protein is Kjeldahl, the lipid is Soxhlet according to the description of the analysis manual of the Japanese food standard composition table analysis manual. The extraction method, the dietary fiber is measured by the enzyme weight method, and the ash content is directly measured by the ashing method, and the total amount of these is subtracted from the total amount of crude guar gum.
It is preferable that content of the polysaccharide in the crude guar gum dry product used for this invention is 40 to 95 mass%, It is more preferable that it is 70 to 95 mass%, 80 to 95 mass% More preferably, it is less than 10%. As such crude guar gum, for example, RG 1000 (trade name, manufactured by MRS Polysaccharides Co., Ltd.) can be mentioned.

The present inventors focused attention on crude guar gum as a supply source of a polymer compound for imparting pseudoplasticity to fire extinguishing water, and repeated studies on using it as a fire extinguishing agent. I found the advantage of d).
(A) Crud guar gum is less likely to form a powder when added to water, as compared to purified guar gum (a preparation in which crude guar gum is refined and the polysaccharide content is increased to 95% by mass or more), and dispersibility Is higher. That is, while the purified guar gum is added to water, the particles do not settle, and the particles of the purified guar gum stagnate on the surface of the water, while the continuous gour gum is formed while the crude guar gum is added to the water It settles quickly and disperses in water. This tendency becomes more pronounced in the presence of the dispersion aid described later. Thus, crude guar gum and purified guar gum have a great difference in their dispersibility in water.
(B) Many of the particles of crude guar gum are short strands and physically entangle when mixed with other substances such as dispersion aids. Therefore, the fire extinguishing water prepared using a fire extinguishing agent comprising a mixture containing crude guar gum is difficult to be separated into layers even if shaken or the like, and the homogeneity or dispersibility of its component composition is excellent. Therefore, the dispersion of the performance and quality of the prepared extinguishing water can be further suppressed.
(C) The crude guar gum does not lose its dispersibility in water of high hardness such as seawater, and can impart thickening property. Therefore, even when using seawater often present at a fire site, it is possible to prepare extinguishing water having the same performance as when using ordinary water, and it is excellent in practicability.
(D) Since the transparency of the aqueous solution is lower than that of purified guar gum, the coloring effect is enhanced when the fire extinguishing water is colored. Therefore, it is suitable also for preparation of the coloring fire extinguishing water for identifying the part which the fire extinguishing water reached.

In order to develop the good dispersibility of crude guar gum in water more effectively, the fire extinguishant of the present invention contains the dispersion aid described below.

[Dispersion aid]
The fire extinguishant of the present invention contains at least one selected from monosaccharides and oligosaccharides as a dispersion aid for crude guar gum.
As said monosaccharide, 1 type (s) or 2 or more types selected from glucose, galactose, mannose, fructose etc. are mentioned.
Examples of the above oligosaccharides include disaccharides such as lactose, sucrose and maltose, trisaccharides such as nigerotriose, maltotriose, melezitose, maletotriulose, raffinose and kestose, and tetrasaccharides such as distose, nigerotetraose and stachyose 1 type or 2 types or more selected from etc. are mentioned.

The above monosaccharides and oligosaccharides are adsorbed to crude guar gum to prevent excessive aggregation between crude guar gums. In addition, since the dispersion aid rapidly settles and disperses in water, the crude guar gum adsorbed to the dispersion aid is also dragged by the dispersion aid and easily settles into water, and the crude guar gum into water Dispersion is promoted.

In the extinguishant of the present invention, the total amount of monosaccharides and oligosaccharides is 30 to 400 parts by mass, more preferably 50 to 200 parts by mass, and 70 to 180 parts by mass with respect to 100 parts by mass of crude guar gum. It is further preferred that By setting the content of the dispersion aid in the above range, the dispersibility or dispersion stability of crude guar gum can be further enhanced.
When the content of monosaccharides and oligosaccharides is too high, the amount of the fire extinguishing agent used for preparing the fire extinguishing water must be increased, and the usability and economic efficiency of the fire extinguishing agent decrease. The same applies to inorganic sodium salts, inorganic potassium salts, ammonium salts and foaming agents described later.
In the present specification, the term “total amount of monosaccharides and oligosaccharides” means not only forms containing both monosaccharides and oligosaccharides, but also forms containing only oligosaccharides without monosaccharides, Alternatively, it is also used for forms containing only oligosaccharides and no oligosaccharides. That is, in the form not containing monosaccharides, "the total amount of monosaccharides and oligosaccharides" means the amount of oligosaccharides, and in the form not containing oligosaccharides, the "total amount of monosaccharides and oligosaccharides" is the amount of monosaccharides Means

The extinguishant of the present invention preferably contains, as a dispersion aid, at least one selected from sucrose and white sucrose, and particularly preferably contains white sucrose.
Super white sugar is a granular sugar obtained by adding invert sugar to sucrose, and more specifically, sucrose is a main component, and invert sugar (a mixed sugar of glucose and fructose) and water are on the crystal surface of sucrose. A granular sugar produced by dusting invert sugar solution. The proportion of invert sugar in top white sugar which can be used as a dispersion aid is preferably 0.1 to 5.0% by mass, more preferably 0.2 to 3.0% by mass, and still more preferably 0.5 to 2 It is .0 mass%. Further, the proportion of water in the white sucrose that can be used as a dispersion aid is preferably 0.1 to 5.0% by mass, more preferably 0.2 to 2.0% by mass, and still more preferably 0.5. It is ̃1.5 mass%. The upper white sugar is moist on the crystal surface by the invert sugar solution, so when mixed with the crude guar gum, the crude guar gum is appropriately adsorbed to become granular. Thereby, when the fire extinguishing agent of the present invention is added to water, crude guar gum can be more easily sedimented, and it can be more reliably prevented that it becomes suspended powder or remains undissolved while floating on the water surface.
In the present specification, when "sucrose" is simply referred to as a component in a fire extinguishing agent, it is used in a meaning that does not include sucrose contained in white sugar. Moreover, in the present specification, "upper white sugar" is included in "at least one selected from monosaccharides and oligosaccharides".

Moreover, it is also preferable that the fire extinguisher of this invention is a form which contains reducing sugar as a dispersion adjuvant. Under high temperature at the fire site, it can react with amino compounds to form carbides (Maillard reaction) to reinforce the fire-extinguishing action. Here, the Maillard reaction is a reaction in which a reducing sugar and an amino compound are reacted by a non-enzymatic reaction to form a brown substance having a more complicated molecular structure. It easily progresses by high temperature heating, often accompanied by caramelization, carbonization and the like.
In the fire extinguisher of the present invention, the high molecular weight polysaccharides hardly function as a dispersing aid for crude guar gum. In the following examples, it has been shown that when starch is added instead of monosaccharides and oligosaccharides, the dispersibility of crude guar gum is not improved. The extinguishant of the present invention preferably contains no starch.

The fire extinguishing agent of the present invention is at least one member selected from the group consisting of inorganic sodium salt, inorganic potassium salt, ammonium salt, and a foaming agent as a dispersing aid for crude guar gum in addition to the above monosaccharides and oligosaccharides. The form containing is also preferable.
Examples of the inorganic sodium salt include one or more selected from sodium chloride, sodium sulfate, sodium nitrate, sodium phosphate, sodium pyrophosphate, sodium polyphosphate, sodium metaphosphate and the like.
Examples of the inorganic potassium salt include one or more selected from potassium chloride, potassium sulfate, potassium nitrate, potassium phosphate, potassium pyrophosphate, potassium polyphosphate, potassium metaphosphate and the like.
As said ammonium salt, 1 type (s) or 2 or more types selected from ammonium chloride, ammonium sulfate, ammonium phosphate etc. are mentioned.

These inorganic sodium salts, inorganic potassium salts and ammonium salts are also adsorbed to crude guar gum and have an effect of preventing excessive aggregation of crude guar gums. In addition, since the dispersion aid rapidly settles and disperses in water, the crude guar gum adsorbed to the dispersion aid is also dragged by the dispersion aid and easily settles into water, and the crude guar gum into water Dispersion will be promoted.

The blowing agent has a composition that generates a gas in water when the extinguishant containing it is poured into water. As an example of the foaming agent, a foaming agent comprising sodium hydrogencarbonate and at least one organic acid selected from citric acid, fumaric acid, succinic acid, malic acid etc., a combination of ammonium hydrogencarbonate and the above organic acid And a foaming agent obtained by combining sodium nitrite and ammonium chloride.
The above-mentioned foaming agent is foamed in water to stir the water and improve the dispersibility of crude guar gum and the like.
In the present invention, each component constituting the blowing agent may be independently present in the extinguishant. That is, when the foaming agent comprising a plurality of components is blended into the extinguishant, the extinguishant comprising the components separately blended is also included in the extinguishant comprising the foaming agent in the present invention.

In the case where the fire extinguishing agent of the present invention contains at least one selected from the group consisting of inorganic sodium salt, inorganic potassium salt, ammonium salt, and a foaming agent as a dispersion aid of crude guar gum, the content thereof is particularly limited Although there is no limitation, it is preferable that the total amount of the inorganic sodium salt, the inorganic potassium salt, the ammonium salt and the foaming agent is 50 to 200 parts by mass with respect to 100 parts by mass of crude guar gum from the viewpoint of further improving the dispersibility. In addition, when the total amount of monosaccharides and oligosaccharides in the fire extinguishing agent is about 30 to 100 parts by mass with respect to 100 parts by mass of crude guar gum, the total amount of inorganic sodium salt, inorganic potassium salt, ammonium salt and foaming agent is 50. It is preferable to contain up to 200 parts by mass.
In addition, in this specification, the term "the total amount of inorganic sodium salt, inorganic potassium salt, ammonium salt, and foaming agent" is a form including all of inorganic sodium salt, inorganic potassium salt, ammonium salt, and foaming agent. Besides, it is also used for a form including at least one of inorganic sodium salt, inorganic potassium salt, ammonium salt, and a foaming agent. For example, "inorganic sodium salt, inorganic potassium salt, ammonium salt and blowing agent total amount" in the form containing inorganic sodium salt and not containing inorganic potassium salt, ammonium salt and foaming agent means the amount of inorganic sodium salt Do.

[Polymer polysaccharide]
The fire extinguishing agent of the present invention may contain a water-soluble polymer polysaccharide other than guar gum derived from the crude guar gum. The water-soluble polymer polysaccharide is not particularly limited, but one or more selected from the group consisting of tamarind seed gum, alginate, xanthan gum and pullulan can be suitably used. Among them, xanthan gum is preferably used. As the xanthan gum, Soaxane XG-350 (trade name, manufactured by MRC Co., Ltd.) can be suitably used. In the present invention, the "water-soluble polymeric polysaccharide" is preferably soluble in water at 30 ° C, and more preferably soluble in water at 25 ° C or less.
By incorporating the water-soluble polymer polysaccharide in the fire extinguishing agent of the present invention, the thickening action of crude guar gum can be appropriately reinforced, whereby the adhesion of prepared fire extinguishing water, storage stability of the fire extinguishing water concerned It is possible to improve the properties and thermal stability.

In the case where the fire extinguishing agent of the present invention contains a water-soluble polymer polysaccharide other than guar gum derived from crude guar gum, the content of the water-soluble polymer polysaccharide is 5 to 75 parts by weight with respect to 100 parts by weight of crude guar gum. It is preferably part, more preferably 10 to 50 parts by mass, and still more preferably 12 to 40 parts by mass.

[Surfactant]
The extinguishant of the present invention can contain an anionic surfactant or a nonionic surfactant or a combination thereof.
As said anionic surfactant, 1 type (s) or 2 or more types of surfactant of a carboxylic acid type, a sulfuric acid ester type, a sulfonic acid type, and a phosphoric acid ester type are mentioned, for example, The alpha- Olefin sulfonate (AOS), alkyl sulfate (AS), polyoxyethylene alkyl ether sulfate (AES), N-acyl taurine salt and the like can be mentioned.
Examples of the nonionic surfactant include one or more of fatty acid ester, ether type, ether / ester type, polyhydric alcohol type, polyhydric alcohol / ester type surfactant, and specific examples thereof Examples include polyoxyethylene alkyl ether, sucrose fatty acid ester, glycerin fatty acid ester (monoglyceride, diglyceride) and the like.

The above-mentioned anionic surfactant is excellent in diffusion and solubility in water, so by including it in a fire extinguishing agent, the dispersibility of crude guar gum and polysaccharides in water is improved to increase the viscosity rising speed. And can impart surface activity to fire extinguishing water.
Moreover, if the said nonionic surfactant is contained in a fire extinguisher, surface activity can be provided to the water for fire extinguishing, without inhibiting a thickening effect and viscosity rise speed.
Furthermore, any of the above-described surfactants can suppress the growth of microorganisms depending on the amount added, and also contribute to sustaining the pseudoplasticity of fire extinguishing water for a long time.
In addition, if an amino compound is used as a surfactant, not only the surface activity to fire extinguishing water is imparted, but also the Maillard reaction with reducing sugar proceeds at high temperatures at the fire site, and carbide can be formed. The action can be reinforced.

In the case where the extinguishant of the present invention contains the above-mentioned surfactant, the total content of the surfactant is preferably 1 to 40 parts by mass, and 2 to 30 parts by mass with respect to 100 parts by mass of crude guar gum. Is more preferably 5 to 20 parts by mass.
In addition, the surfactant contained in the composition of the extinguishant of the present invention is preferably less than 20.0% by mass, more preferably less than 10.0% by mass, and less than 7.0% by mass. Is more preferred. If the content of the surfactant is too large, the solubility in water may be deteriorated, and the viscosity increase rate of the fire extinguishing water may be slow, and at the same time, the toxicity to aquatic organisms is also concerned.

The extinguishant may contain one or more other components such as a colorant, an antifreeze solution, an antioxidant, a corrosion inhibitor, and an antifungal agent, in addition to the components described above. The content of the other components in the extinguishant of the present invention is preferably 0.01 to 1.0 parts by mass, and preferably 0.1 to 0.5 parts by mass with respect to 100 parts by mass of crude guar gum. Is more preferred.

The form of the extinguishant of the present invention is not particularly limited, but it is preferable that each raw material is in the form of a homogeneously mixed composition. The extinguishant of the present invention may be in the form of a solid, fluid or liquid, but is preferably in the form of powder, granules or tablets, from the viewpoint of handling and dispersibility in water. The tablet form is more preferable, and the granular form is particularly preferable. Granules in the present invention refer to those obtained by forming the powder into slightly larger particles. The extinguishant of the present invention can be obtained by mixing the above-mentioned respective raw materials in a desired ratio, and molding the mixture into a desired dosage form by an ordinary method. Granular fire extinguishing agent, stirring granulation method, extrusion granulation method, tumbling granulation method, tablet granulation method, fluid bed granulation method, spray drying granulation method, melt granulation method, vacuum freeze drying method It can be prepared by a usual method such as suspension aggregation granulation method or coating granulation method. Moreover, in preparation of a granular fire extinguisher, surfactant mentioned above as a binder for granulation can also be used. In addition, when the fire extinguishing agent contains super-white sugar, it is possible to naturally obtain a granular fire extinguishing agent by simply mixing the raw materials.
When the extinguishant of the present invention is in the form of granules, 80% by mass or more, more preferably 90% by mass or more, still more preferably 95% by mass or more, still more preferably 97 to 100% by mass of the whole extinguishant Preferably, they are granules of 1 to 1.5 mm, preferably 0.2 to 1.0 mm. Such granular fire extinguishing agents can be obtained by subjecting the granules to a desired screen. The said particle size can be measured by measurement on the photograph or the image | photographed with the common microscope, a stereomicroscope, or a microscope (for example, VH series of Keyence, VHX series).

The fire extinguisher of the present invention may be subjected to a coating treatment as required. In addition, crude guar gum that has been subjected to a coating treatment can also be used as a raw material. The material used for coating is preferably a surfactant. Preferred examples of the surfactant are the same as the surfactants described above. The coating process can be performed by a conventional method, for example, can be performed in processes such as stirring granulation method, rolling granulation method, fluidized bed granulation method, coating granulation method, etc. It can also be performed using another coating apparatus or process. The coating can further enhance the dispersibility of the extinguishant.

<Preparation method of fire extinguishing water of the present invention>
Water for fire extinguishing can be prepared by dispersing and dissolving the fire extinguishing agent of the present invention in water. A fire extinguishing activity is carried out by discharging the extinguishing water. There is no restriction | limiting in particular in the water used for preparation of fire extinguishing water, It may be fresh waters, such as tap water, river water, lake water, underground water, It may be seawater. When preparing fire extinguishing water, crude guar gum in the fire extinguishing water (if the fire extinguishing agent contains a polymeric polysaccharide, the total of crude guar gum and polymeric polysaccharides so that the prepared fire extinguishing water exhibits appropriate pseudoplastic properties) It is preferable to adjust the content of 0.1 to 5.0% by mass, more preferably 0.15 to 3.0% by mass, and still more preferably 0.2 to 1.0% by mass. Moreover, when preparing the fire extinguishing water, the extinguishant may be added to the water all at once, or may be added to the water several times. Since the extinguishant of the present invention exhibits good dispersibility only by adding it to water, it is possible to easily prepare extinguishing water having a homogeneous property.

The fire-extinguishing water showing pseudo plastic properties prepared using the fire-extinguishing agent of the present invention has less diffusion due to air flow after water discharge than water and synthetic surfactant water extinguishing water, and water absorbing polymer water fire extinguishing water Because it diffuses appropriately, it can spread appropriately and land on the fire site while holding enough water. In forest fires in particular, the updraft due to the fire and the excessive diffusion due to the airflow generated by the flight of the helicopter or aircraft are suppressed, and it is possible to land on the fire site while spreading appropriately, so the fire extinguishing water that contributes to extinguishing The proportion can be further increased, and it exhibits high extinguishing action with less water discharge.

The fire-extinguishing water exhibiting pseudoplasticity prepared using the fire-extinguishing agent of the present invention is scattered by the impact of the landing and adheres to surrounding combustibles and combustibles to enhance the fire-extinguishing action. Post-adhesion fire-fighting water is less likely to run down to develop higher viscosity, and stays in a place where it adheres for a long time, thus exhibiting a continuous fire-extinguishing action and fire spread prevention action. Furthermore, when the fire extinguishing water contains a surfactant, the permeability to combustibles and combustibles is enhanced, so that a high cooling effect is exhibited and, at the same time, the refire prevention effect of the extinguished part and the fire spread suppressing effect of the unburned matter are also exhibited. Have. Moreover, when the water for fire extinguishing contains saccharides, the fire spread prevention effect by carbonizing this saccharides at high temperature is also exhibited.

<Fire extinguishing method of the present invention>
The fire extinguishing method of the present invention includes the step of discharging the fire extinguishing water prepared by the above-described method of preparing fire extinguishing water of the present invention to a fire site.

In the fire extinguishing method of the present invention, the fire-extinguishing water showing pseudo plastic properties prepared using the extinguishant of the present invention is discharged to the fire site. There are no particular restrictions on the method of discharging the fire extinguishing water, and methods such as spraying from above, water discharging from a fire-fighting vehicle, manual spraying using a bucket, etc. may be used. It is particularly suitable for spraying from the sky to a fire site using an aircraft such as a boat or an airplane.

Since the fire extinguishing water discharged by the fire extinguishing method of the present invention exhibits pseudo plasticity, it can suppress excessive diffusion due to air flow after water discharge such as water and extinguishing water of surfactant type, It diffuses moderately compared to water extinguishing water of water absorbing polymer type. Therefore, according to the fire extinguishing method of the present invention, it is possible to cause the target area of the fire site to be landed and dispersed with high accuracy while the fire extinguishing water holding the water is properly diffused. In forest fires in particular, it is possible to suppress the excessive air diffusion caused by the updraft due to the fire or the flight of a helicopter or aircraft, and to land and disperse it to the target of the fire site while spreading appropriately, which contributes to extinguishing the fire. The proportion of extinguishing water can be increased more than conventional extinguishing water. In other words, efficient extinguishing work with a small amount of water is possible.

In the fire extinguishing method of the present invention, since the extinguishing water to be discharged exhibits pseudoplasticity, it is scattered by the impact of the landing and adheres to surrounding combustibles and combustibles to enhance the fire extinguishing action. After adhesion, the fire extinguishing water is difficult to run down to develop higher viscosity, and stays in a place where it adheres for a long time, so it exhibits a continuous fire-extinguishing action and fire spread preventing action. Furthermore, when the fire extinguishing water contains a surfactant, the permeability to combustibles and combustibles is enhanced, so that a high cooling effect is exhibited and, at the same time, the refire prevention effect of the extinguished part and the fire spread suppressing effect of the unburned matter are also exhibited. Have. Moreover, when the water for fire extinguishing contains saccharides, the fire spread prevention effect by carbonizing this saccharides at high temperature is also exhibited.

EXAMPLES The present invention will be described in more detail based on examples given below, but the invention is not meant to be limited by these.

Preparation Example 1 Preparation of Fire Extinguisher A fire extinguishing agent (the product of the present invention 1-53 and comparative product 1-16) having the composition (unit: mass part) shown in the following Tables 1 to 5 was prepared.

Preparation Example 2 Preparation of fire extinguishing water (fresh water)
Prepare 200 ml of distilled water (DW) at 25 ° C ± 0.5 ° C in a beaker, and the total content of crude guar gum and xanthan gum is 0.20 to 1.25% by weight. It was dispersed and dissolved as described above to prepare extinguishing water. Dispersion and dissolution were carried out by setting the stirring rotational speed to 1000 rpm and stirring for 5 minutes.

Preparation Example 3 Preparation of Water for Fire Fighting (Seawater)
A fire extinguishing water was prepared in the same manner as in Preparation Example 2 except that, in Preparation Example 2, artificial seawater with the following composition was used instead of distilled water.

-Artificial seawater composition-
· Magnesium chloride (MgCl ₂ · 6H ₂ O) 1.10% by mass
· Calcium chloride (CaCl ₂ · 2H ₂ O) 0.16% by mass
・ Sodium chloride (NaCl) 2.50 mass%
-Sodium sulfate (Na ₂ SO ₄ ) 0.40% by mass
・ Water 95.84 mass%

The raw materials described in the following table are described below.
-Crud guar gum RG 1000: crude guar gum (made by M.R. Sea polysaccharides)
· Guar gum RG700: Purified guar gum (manufactured by MRC polysaccharides)
Soaxane XG-350: xanthan gum (manufactured by M.C.C. polysaccharides)
・ Upper white sugar: Mitsui Co., Ltd. ・ Sucrose: sucrose, Wako Pure Chemical Industries)
D (+)-glucose: glucose (manufactured by Wako Pure Chemical Industries, Ltd.)
・ Kimiloid NLSK: Alginate (manufactured by Kimica)
Sanwa Corn Alpha Y: Starch (Sanwa Starch Co., Ltd.)
Lipolan PB-800: α-olefin sulfonate Na (anionic surfactant, manufactured by Lion Corporation)
Ryoto sugar ester L-1695: sucrose laurate (nonionic surfactant, manufactured by Mitsubishi Chemical Foods Co., Ltd.)
-NIKKOL sarcosinate LN: N-acyl amino acid Na (anionic surfactant, manufactured by Nikko Chemicals)
-Dehydroacetic acid S-Daigo Sugar: Dehydroacetic acid Na (preservative, made by Thaisho Technos)
-Sorbic acid K-Daigo sugar "granule": Sorbic acid K (preservative, made by Taisho Technos Co., Ltd.)
Brilliant blue FC: 2- [α- [4- (N-ethyl-3-sulfobenzyliminio) -2,5-cyclohexadienylidene] -4- (N-ethyl-3-sulfobenzylamino) benzyl ] Disodium salt of benzene sulfonate (blue coloring agent, manufactured by Hodogaya Chemical Co., Ltd.)
-Indigo carmine: disodium salt of 5,5'-indicotin disulfonic acid (blue coloring agent, manufactured by Hodogaya Chemical Co., Ltd.)
HPC-L: hydroxypropyl cellulose (binder, manufactured by Nippon Soda Co., Ltd.)
・ DW: Distilled water ・ ASW: Artificial sea water

The extinguishant (present invention products 1 to 26, comparative products 1 to 14) described in Tables 1 and 2 above are obtained by simply mixing the raw materials. Invention Products 3 to 5 and Invention Products 15 to 26 and Comparative Products 5 and 7 containing a predetermined amount of superwhite sugar became granular fire extinguishing agents, and the other fire extinguishing agents were powdery.

The extinguishant (present invention products 27 to 38) described in Table 3 above is a granular extinguishant obtained by granulating to a desired particle diameter by a stirring granulation method. 98% by mass or more of each extinguishant described in Table 3 was in the range of the particle size described in Table 3, and the rest were broken pieces or powder of finely divided granules.

The fire extinguishing agent described in the above Table 4 is obtained by coating crude guar gum, Soaxan XG 350 in advance with glycerin fatty acid ester (trade name: MCA-150, manufactured by Sakamoto Yakuhin Kogyo Co., Ltd.) or anionic surfactant (Lipolan PB-800). It is an extinguishing agent obtained by simply mixing each raw material using this.

The extinguishant described in the above Table 5 is a extinguishant obtained by simply mixing the respective raw materials. Although the inventive products 45 to 50 have the same composition as the fire extinguishing agent, the method for preparing the fire extinguishing water using this and the test method are different, so the columns are separately described. That is, the fire extinguishing agent of the invention 46 was dispersed in a water temperature of 10.degree. C., the fire extinguishing agent of the invention 47 was dispersed in a water temperature of 38.degree. Further, the fire extinguishing agent of the invention 48 was dispersed in acidic water of pH 3.31, the fire extinguishing agent of the invention 49 was dispersed in alkaline water of pH 9.75, and other, fire extinguishing water was prepared in the same manner as in Preparation Example 2.

The fire extinguishing water prepared by the method described in Preparation Examples 2 and 3 using the fire extinguishing agent according to the present inventions 1-53 not only has the viscosity shown in each table but also has pseudoplasticity. It was a thing.

<Test Example 1> Evaluation of dispersibility The dispersibility when each extinguishant prepared in the above Preparation Example 1 was introduced into water was evaluated. Specifically, each fire extinguishing agent is put into a beaker containing 200 ml of distilled water at 25 ° C. ± 0.5 ° C., and the number of revolutions of stirring is set to 400 rpm to disperse and dissolve for 30 seconds, and the dispersibility is visually observed And evaluated based on the following evaluation criteria. The standard of practical application is evaluation B or more. The results are shown in Tables 1 to 5 above.

-Evaluation criteria of dispersibility-
A: Does not produce a pass powder.
B: Produce a small paste.
C: Produces a large sized flour.
D: The formation of larger flour and the aggregation on the water surface are observed.

<Test Example 2> Evaluation of dispersion stability Each fire extinguishing water prepared in the above Preparation Examples 2 and 3 was allowed to stand still at 25 ° C ± 0.5 ° C and visually observed over two weeks, and the dispersion was stabilized according to the following evaluation criteria The sex was evaluated. The standard of practical application is evaluation B or more. The results are shown in Tables 1 to 5 above. In addition, when phase separation occurs, in many cases, the lower side of the extinguishing water standing still becomes cloudy and viscosity increases, and conversely, the upper side decreases viscosity and becomes a transparent liquid.

-Evaluation criteria of dispersion stability-
A: There is no phase separation in the dispersed state for two weeks.
B: No phase separation in the dispersed state over 24 hours.
C: Phase separation immediately after adjustment of fire extinguishing water.

<Test Example 3> Evaluation of Viscosity Viscosity of fire extinguishing water after preparation for fire extinguishing water by the same method as the above Preparation Examples 2 and 3 and standing for 10 minutes at 25 ° C. ± 0.5 ° C. for 24 hours (unit: The viscosity of the rotor no. It measured at 3 or 2 and 60 rpm. The results are shown in Tables 1 to 5 above. If the viscosity after standing for 10 minutes is 150 mPa · s or more and the equilibrium viscosity (viscosity after standing for 24 hours) is 200 mPa · s or more, it can be judged that the practicability is excellent.

As shown in Tables 1 to 5, it was found that using the fire extinguishing agent of the present invention, it is possible to obtain a homogeneously dispersed fire extinguishing water without forming a repellant powder within a very short time of 400 rpm for 30 seconds. Moreover, the said fire extinguishing water substantially cleared 150 mPa * s after 10 minutes also in viscosity evaluation.
If the fire extinguishing water has an appropriate viscosity, it can be distributed to the fire site with a small amount of loss while spreading properly while being air-dispersed. If the viscosity is low and the difference in viscosity with water is small, it is likely to be scattered over a wide range like water, and an effective fire extinguishing ability can not be obtained. Is limited. Generally, if the viscosity is about 150 mPa · s or more, it is considered that the fire extinguishing can be performed more efficiently than water. In addition, in practical use, if the viscosity is up to about 2000 mPa · s, effective extinguishing is possible.

<Test Example 4> Evaluation of fire spread prevention performance (adhesion amount of water for fire extinguishing and burning speed)
Prepare 3 pieces of wood (white birch wood) with a cross-sectional shape of 5 mm × 5 mm and a length of about 250 mm, and fix the ends with a jig so that the 3 pieces of wood have a positional relationship as shown in FIG. As shown in, it was installed with an angle of 45 degrees.

[Adhesive water adhesion amount]
The amount of adhesion of fire extinguishing water is by immersing the above 3 pieces of wood whose ends are fixed with a jig vertically to the height of 150 mm from the end opposite to the jig for 2 seconds in the fire extinguishing water for 2 seconds, The amount of adhesion of fire extinguishing water per wood piece was calculated from the difference between the weight and the weight after 5 minutes (g), and in view of the results of examination of the burning rate described later, evaluation was made according to the following evaluation criteria. The results are shown in Tables 1 to 5 above.
-Evaluation criteria for adhesion of fire fighting water-
A: The adhesion amount of fire extinguishing water per wood piece is 0.40 g or more.
B: The adhesion amount of fire extinguishing water per wood piece is 0.30 g or more and less than 0.40 g.
C: The adhesion amount of fire extinguishing water per wood piece is less than 0.30 g.

-Burning velocity-
A piece of wood whose weight was measured above was placed in the state shown in FIG. 1b, and the lower end was ignited at the lower end for 30 seconds using a gas burner, and the time required to burn 40 mm to 140 mm from the lower end was measured. When the fire was extinguished on the way, the time to extinguish was measured. The burning rate (cm / sec) was calculated from the obtained values.

An example of the result of the fire spread prevention performance (adhesion amount of water for fire extinguishing and burning speed) is shown in FIG. The horizontal axis represents the amount of attached fire-fighting water per 150 mm of wood, and the vertical axis represents the burning rate. As a result of repeating tests including dried wood pieces and wood pieces to which water was attached, as shown in FIG. 2, it was confirmed that the adhesion amount of fire extinguishing water and the burning rate were highly correlated. When the burning rate is about 0.06 cm / sec or more, the test piece burns up to 140 mm at a burning rate of about 0.06 cm / sec. There is. The adhesion amount at this boundary was calculated from the approximate curve in FIG. 2 and was about 0.39 g (per 150 mm per wood piece).

<Test Example 5> Evaluation of spray density and diffusivity of fire extinguishing water Using a small wind tunnel of 600 mm, using an air velocity of 5.7 m / s, extinguishing water spray amount of 200 g, and fire extinguishing water spraying height of 590 mm The flight was simulated, and the distribution density and diffusion of fire extinguishing water were observed.
In order to determine the spray density and diffusion amount of fire extinguishing water, a total of 91 sheets of water absorbent non-woven fabric 46 mm square from the area directly under the fire extinguishing water [13 sheets downwind] × [7 sheets directed vertically to the wind direction] Were placed in the wind tunnel, and each mass of fire extinguishing water absorbed and loaded in the non-woven fabric was measured. It is said that the dispersal density of fire extinguishing water that can be extinguished in forest fires is 1.6 L / m ² or more.
The same as Preparation Example 2 except that the content of the extinguishant in the extinguishing water was adjusted to the concentration described in Table 6 (unit: mass%) using the extinguishant of the present invention products 3 and 45. The fire extinguishing water was prepared, and this fire extinguishing water was subjected to the test.

Table 6 shows the experimental results on the spray density and diffusivity of fire extinguishing water. The spray density was calculated using an area to secure 1.6 L / m ² or more as the effective extinguishing area, and the effective extinguishing area when the extinguishing water was water was compared as 1. The diffusivity was evaluated by the amount of scattering to the outside of the wind tunnel by wind (disappeared amount). The lost amount in Table 6 below is the ratio (% by mass) of the lost amount to the mass of 200 g of the extinguishing water sprayed.

As shown in Table 6, in the case of the commercially available synthetic surfactant fire extinguishant, the sprayed fire extinguishing water diffused and the effective fire extinguishing area decreased as compared with the case where the fire extinguishing water was water. In addition, the loss of fire fighting water increased. In the case of a commercially available water-absorbing polymer fire extinguisher, the effective fire extinguishing area was reduced because the sprayed fire extinguishing water was concentrated and partially concentrated.
On the other hand, in the case of the fire extinguishing water using the product of the present invention, the effective extinguishing area became larger because the water diffused properly, and the loss of the fire extinguishing water was smaller. From this result, it has been found that the extinguishant of the present invention is suitable for preparation of extinguishing water with high extinguishing performance. The fire extinguishing agent of the present invention can be suitably used particularly for preparation of fire extinguishing water in the case where water is released (dispersed) from above the fire to the fire extinguishing target using a helicopter, aircraft or the like.

While the present invention has been described in conjunction with its embodiments, we do not intend to limit our invention in any detail of the description unless otherwise specified, which is contrary to the spirit and scope of the invention as set forth in the appended claims. I think that it should be interpreted broadly without.

The present application claims priority based on Japanese Patent Application No. 2012-68337 filed in Japan on March 23, 2012, which is incorporated herein by reference in its entirety. Capture as part.

1 Wood piece 2 Jig for fixing wood pieces

Claims

A fire extinguishing agent containing crude guar gum and further containing at least one selected from monosaccharides and oligosaccharides as a dispersion aid for crude guar gum, wherein monosaccharides and oligosaccharides are added to 100 parts by mass of crude guar gum Extinguishing agent containing 30 to 400 parts by mass in total.
The fire extinguisher according to claim 1, further comprising at least one selected from the group consisting of inorganic sodium salt, inorganic potassium salt, ammonium salt and a foaming agent as a dispersion aid for crude guar gum.
The fire extinguishing agent according to claim 2, wherein the total amount of inorganic sodium salt, inorganic potassium salt, ammonium salt and foaming agent is 50 to 200 parts by mass with respect to 100 parts by mass of crude guar gum.
A foaming agent comprising sodium hydrogencarbonate and at least one organic acid selected from the group consisting of citric acid, fumaric acid, succinic acid and malic acid, ammonium hydrogencarbonate, citric acid, fumaric acid At least one selected from the group consisting of a foaming agent comprising a combination of at least one organic acid selected from the group consisting of an acid, succinic acid and malic acid, and a foaming agent comprising a combination of sodium nitrite and ammonium chloride The fire extinguisher according to claim 2 or 3, which is a foaming agent of a certain type.
The fire extinguisher according to any one of claims 1 to 4, which contains at least one selected from sucrose and white sucrose as a dispersion aid for crude guar gum.
The fire extinguisher according to any one of claims 1 to 5, which comprises 5 to 75 parts by mass of a water-soluble high molecular weight polysaccharide other than guar gum derived from crude guar gum relative to 100 parts by mass of crude guar gum.
The fire extinguisher according to claim 6, wherein the water-soluble polymer polysaccharide other than guar gum derived from crude guar gum is at least one selected from the group consisting of tamarind seed gum, alginic acid ester, xanthan gum and pullulan.
The fire extinguisher according to claim 6 or 7, wherein a water-soluble polymer polysaccharide other than guar gum derived from crude guar gum is coated with a surfactant.
The fire extinguisher according to any one of claims 1 to 8, wherein the crude guar gum is coated with a surfactant.
The fire extinguisher according to any one of claims 1 to 9, comprising at least one surfactant selected from the group consisting of anionic surfactants and nonionic surfactants.
The anionic surfactant is at least one member selected from the group consisting of α-olefin sulfonate, alkyl sulfate, polyoxyethylene alkyl ether sulfate and N-acyl taurine salt, and the nonionic surfactant is The fire extinguisher according to claim 10, which is at least one selected from the group consisting of polyoxyethylene alkyl ether, sucrose fatty acid ester and glycerin fatty acid ester.
The fire extinguisher according to any one of claims 1 to 11, containing at least one selected from the group consisting of a colorant, an antifreeze, an antioxidant, a corrosion inhibitor, and a fungicide.
The fire extinguisher according to any one of claims 1 to 12, which is in the form of granules or tablets.
The fire extinguisher according to any one of claims 1 to 13, which does not contain starch.
A method for preparing fire extinguishing water, comprising the steps of dispersing and dissolving the fire extinguishing agent according to any one of claims 1 to 14 in water.
A fire extinguishing method comprising the step of discharging the fire extinguishing water prepared by the method for preparing fire extinguishing water according to claim 15 to a fire site.