JPH06304265A - Oil solidifying agent which possesses combustion suppressing function - Google Patents

Abstract

PURPOSE:To obtain an oil solidifying agent which possesses the fire suppressing function for the hydrocarbon-based mineral oil, petroleum chemical articles, etc., and the fire extinguishing faculty. CONSTITUTION:An oil solidifying agent possesses the oil combustion suppressing function and contains 20-50wt.%. powdery organic polymer oil absorbing agent consisting of the block copolymer consisting of polystyrene blocks and polybutadiene blocks, the block copolymer consisting of polystyrene blocks and polyisoprene blocks, polynorbornene and the mixture thereof, and 50-80wt.%. powdery extinguishing agent. When this oil solidifying agent is used as an extinguishing agent for an oil fire, the fire can speedily be extinguished, and the recombustion of the oil can be suppressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil solidifying agent having a combustion suppressing function such as an ignition suppressing function, a fire extinguishing function and a reignition suppressing function.

[0002]

2. Description of the Related Art When flammable oil spills on the ground or on the water, it is necessary to prevent the spilled area from expanding and to prevent ignition and recover the oil. If a fire breaks out, it must be extinguished immediately.

Conventionally, a powder fire extinguisher has been used as an oil fire extinguisher, but when the powder fire extinguisher is used alone,
Although the fire is quickly extinguished, there is a risk that fluid oil will spread to the ground and water surface after the fire is extinguished, and this oil will burn again. On the other hand, various oil-solidifying agents are known, but they do not have an ignition suppressing function, a fire-extinguishing function, or the like, and even if the combustible oil is solidified, there is a risk of ignition.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide an oil-solidifying agent which can solidify oil to suppress ignition or re-ignition, and which has an excellent fire extinguishing power and a combustion suppressing function.

[0005]

The present invention is an oil-solidifying agent having a combustion suppressing function, characterized by containing a powdered organic polymer oil absorbing agent and a powder fire extinguishing agent.

The powdered organic polymer oil absorbent used in the present invention is a hydrocarbon-based mineral oil or petrochemical, such as kerosene, light oil, gasoline, spindle oil, A heavy oil, B oil.
A powder organic polymer capable of adsorbing and solidifying mineral oil such as heavy oil, aromatic hydrocarbon, straight chain hydrocarbon, halogenated hydrocarbon, etc., for example, polystyrene polybutadiene block copolymer, polystyrene polyisoprene block copolymer , Polynorbornene and mixtures thereof.

The polystyrene polybutadiene block copolymer is a block copolymer composed of polystyrene blocks and polybutadiene blocks, and a specific example thereof is a block copolymer in which polystyrene blocks and polybutadiene blocks are alternately arranged. Besides,
A branched or radial block copolymer can be used.
As for the ratio of the polystyrene block and the polybutadiene block, it is preferable that the polystyrene block is smaller in weight ratio, and the polystyrene block is 20 to less than 50% by weight.
Preferably 35 to 45% by weight, polybutadiene block is more than 50% by weight and 80% by weight or less, preferably 55 to 55% by weight.
It is preferably 65% by weight.

This block copolymer has a molecular weight of 1
0,000 to 400,000, preferably 150,000
00 to 300,000, the softening point is around 100 ° C.,
Those that completely fluidize at 180 ° C are preferable. Such a block copolymer is used as a powder, and the particle size thereof is preferably 0.001 to 1 mm, although it depends on the use conditions.

The polystyrene polyisoprene block copolymer is a block copolymer composed of polystyrene blocks and polyisoprene blocks, and a specific example thereof is a block in which polystyrene blocks and polyisoprene blocks are arranged alternately. In addition to copolymers,
A branched or radial block copolymer can be used.
The ratio of the polystyrene block to the polyisoprene block, the molecular weight, the other physical properties, the particle size and the like are preferably the same as those of the polystyrene polybutadiene block copolymer.

The polynorbornene is a polymer containing norbornene as a structural unit, and specific examples thereof include a ring-opening polymer or a ring-opening copolymer of bicyclo [2.2.1] heptene-2 or its derivative. It can be united.
As the derivative, bicyclo [2.2.1] heptene-2
In which the hydrogen atom of is substituted with an alkyl group such as methyl and ethyl, an alkoxy group such as methoxy and ethoxy, a carboxylic acid ester group, a cyan group, a vinyl group, and a halogen. Two or more substituents may be substituted, or two or more types may be substituted.

Polynorbornene has a molecular weight of 30.
10,000-4,000,000, preferably 2,000
30,000-3,000,000, apparent specific gravity 0.2
.About.0.35 and a particle size of 0.001 to 1 mm are preferable.

As the powdery organic polymer oil absorbent used in the present invention, a mixture of polystyrene polybutadiene block copolymer or polystyrene polyisoprene block copolymer and polynorbornene is preferable. In addition, it becomes possible to solidify solidly. The mixing ratio of both components depends on the type of oil to be absorbed, but it is preferably 50 to 250 parts by weight of polynorbornene with respect to 100 parts by weight of the block copolymer.

As the powder fire extinguishing agent used in the present invention, sodium hydrogen carbonate, potassium hydrogen carbonate, ammonium dihydrogen phosphate, KC ₂ H ₃ N ₂ O ₃ , sodium silicate, potassium silicate, mixtures thereof, and these Compositions containing as a main component, and commercially available powder fire extinguishing agents, those conventionally used as fire extinguishing agents for oil fires can be used.

The blending ratio of each component of the oil-solidifying agent of the present invention is
Powdered organic polymer oil absorbent 20 to 50% by weight, preferably 3
It is desirable to use 0 to 40% by weight, 50 to 80% by weight of powder fire extinguishing agent, and preferably 60 to 70% by weight. The oil-solidifying agent of the present invention can be produced by mixing a powdered organic polymer oil absorbent and a powder fire extinguisher.

The oil solidifying agent of the present invention has a combustion suppressing function such as an oil ignition suppressing function, a fire extinguishing function and a reignition suppressing function, and solidifies oil spilled on the ground or on the water while preventing ignition. It can be used as an oil-recovering agent to be collected and recovered, or as an extinguishing agent for oil fires. The target oil is the above-mentioned hydrocarbon-based mineral oils or petrochemicals that can solidify the powdery organic polymer oil absorbent.

When used as an oil recovery agent or fire extinguishing agent, the oil solidifying agent of the present invention is filled in a sprayer, and an inert gas such as nitrogen gas, carbon dioxide or argon is used as a propellant, and the oil flowing out or It can be used by a method such as spraying a drug on burning oil.

When the oil-solidifying agent of the present invention is sprayed on the spilled oil, the oil is adsorbed in a short time by the action of the powdered organic polymer oil-absorbing agent and solidified firmly. Therefore, the fluidity of the oil is lost, the outflow area of the oil is prevented from being expanded, and the oil can be easily recovered with the ignition suppressed.

In the solidified product formed as described above, since the powder fire extinguisher is uniformly dispersed in the solidified product obtained by adsorbing the oil by the powdery organic polymer oil absorbing agent and solidifying, the powdery organic polymer oil absorbing agent and the powder Ignition is suppressed by the synergistic action of the extinguishing agent. In this case, the solidification of the oil lowers the flammability, and the unique fire extinguishing function of the fire extinguishing agent is added, so that the combustion suppressing effect unexpectedly increases. Therefore, the risk of oil burning is reduced, and the work can be performed safely.

When the oil-solidifying agent of the present invention is applied to burning oil, the oil fire is quickly extinguished by the action of the powder fire extinguishing agent. At the same time, the oil is adsorbed and solidified by the action of the powdered organic polymer oil absorbent, the fluidity of the oil is lost, the expansion of the oil outflow area is prevented, and the volatilization of the oil is also prevented, which lowers the combustibility. The fire extinguishing function is increased. Furthermore, since the powder fire extinguishing agent that is uniformly dispersed suppresses the combustion of the oil solidified by the powder organic polymer oil absorbing agent, the reignition of the oil is suppressed by the synergistic action of the powder fire extinguishing agent and the powder organic polymer absorbing agent. To be done.

[0020]

The oil-solidifying agent having a combustion suppressing function of the present invention contains a powdered organic polymer oil absorbing agent and a powder fire extinguisher. It can be adsorbed and solidified, whereby ignition of the solidified oil can be suppressed. When used as an oil fire extinguisher, the fire can be extinguished quickly and reburning can be prevented.

[0021]

EXAMPLES Examples of the present invention will be described below. Example 1 70 parts by weight of the following powder extinguishing agent and 30 parts of powder organic polymer oil absorbent
An oil-solidifying agent was prepared by mixing with 1 part by weight. Powder extinguishing agent: ABC powder extinguishing agent manufactured by Miyata Industry Co., Ltd. was used. Powdered organic polymer oil absorbing agent: 40 parts by weight of powder of a block copolymer (molecular weight of about 200,000) consisting of polystyrene block and polybutadiene block (weight ratio 30:70) and bicyclo [2.2.1] heptene-2 A mixture of 60 parts by weight of powder of polynorbornene (molecular weight 2,000,000 to 3,000,000), which is a ring-opening polymer, was used.

A powder fire extinguisher manufactured by Hatsuda Seisakusho Co., Ltd. which uses carbon dioxide gas as a propellant is filled with the above oil-solidifying agent in a pressure type powder ABC fire extinguisher SP-10A (trademark) sprayer manufactured by Hatsuda Seisakusho. Pressure container C-60 type (carbonic acid (CO
₂ ) As a result of the fire extinguishing test of gasoline using a gas cylinder (trademark) as follows, suppression of reburning of gasoline was confirmed.

Fire Extinguishing Test 1) Empty SP-1 loaded with C-60 type carbon dioxide gas cylinder
A OA fire extinguisher was filled with 2 kg of the oil-solidifying agent. 2) 50 liters of water was injected into a 1 m square oil pan, and 1 liter of gasoline was injected onto the oil pan to ignite the gasoline. Gasoline burned violently in an oil pan. 3) When the oil-solidifying agent was sprayed from the sprayer toward the burning gasoline, the fire was immediately extinguished by the action of the extinguishing agent. 4) Visual observation of the liquid surface state after quenching revealed that about 95% of the area was covered with the oil-solidifying agent. On the liquid surface coated with the oil-solidifying agent, the powdered organic polymer oil absorbing agent absorbed gasoline to form a gelled film, and the fluidity was lost. The gelled film of gasoline was in a state where it could be easily recovered and removed. 5) On the remaining 5% of the liquid surface not covered with the oil solidifying agent, residual gasoline still unreacted with the oil solidifying agent was observed. When this residual gasoline was tried to be ignited again, combustion was started, but when all the gasoline had burned out, the fire was extinguished. Further, the combustion did not reach the surface coated with the oil-solidifying agent, and the surface coated with the oil-solidifying agent was incombustible. This is due to the synergistic action of the powder fire extinguisher and the powder organic polymer oil absorbing agent, that is, the powder organic polymer oil absorbing agent absorbs gasoline and solidifies into a gelled film, which contains the fire extinguishing agent in a suitable and uniform manner. It is recognized that this is because the extinguishing agent exhibits a reburning suppressing effect.

Comparative Example 1 A powder extinguishing agent and a powder organic polymer oil absorbent were separately used,
The following fire extinguishing test of gasoline was conducted. The same powder extinguishing agent and powder organic polymer oil absorbing agent as in Example 1 were used.

Fire Extinguishing Test 1) 5 liters of gasoline was injected into a half-cut drum. 2) 500 g of powder fire extinguishing agent was added to gasoline and stirred. 3) Further, 1 kg of a powdered organic polymer oil absorbent was added to gasoline and mixed by stirring. After adding powdered organic polymer oil absorbent,
In about 1 minute, the entire amount of gasoline was absorbed, and it became an agar-like solidified product of gasoline containing a fire extinguisher inside. 4) When the fire was gradually brought closer to the solidified substance of gasoline using an ignition rod, the solidified substance was ignited and burned when the fire contacted the solidified substance. This combustion ignited explosively and was much slower than the combustion of gasoline alone, which burns violently.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeshi Kaneda 3-4-7 Nishi-Shinjuku, Shinjuku-ku, Tokyo Kurita Industry Co., Ltd.

Claims (1)

[Claims] 1. An oil-solidifying agent having a combustion suppressing function, which comprises a powdered organic polymer oil absorbing agent and a powder fire extinguishing agent.