JP3766871B2 - Chemical extinguishing agent - Google Patents
Chemical extinguishing agent Download PDFInfo
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- JP3766871B2 JP3766871B2 JP03285897A JP3285897A JP3766871B2 JP 3766871 B2 JP3766871 B2 JP 3766871B2 JP 03285897 A JP03285897 A JP 03285897A JP 3285897 A JP3285897 A JP 3285897A JP 3766871 B2 JP3766871 B2 JP 3766871B2
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- Prior art keywords
- ammonium phosphate
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- fire extinguishing
- acrylic acid
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Description
【０００１】
【発明の属する技術分野】
本発明は、新規な１液型の水系化学消火剤に関する。
【０００２】
【従来の技術】
林野火災の消火の際には、通常、消火剤及び着色剤とともにデンプン系、ガム系、合成系等の水溶性高分子化合物である展着剤（増粘剤）を水に溶解させてなる化学消火剤がヘリコプター等から散布される。
化学消火剤には、消火性能に優れることが要求されるのは勿論のことであるが、更にある程度の粘度を有することも必須になる。粘度が水と同等程度に低いと、ヘリコプターから散布しても、消火対象物である木や葉等に消火剤が付着せず、その消火性能が発揮されないからである。そのため、化学消火剤には上記展着剤（増粘剤）が添加されている。一方、消火作業は緊急を要するため、予め、消火剤、着色剤、展着剤等を水に溶解して保存しておけば、消火の際に一々化学消火剤を調製する手間が省け、迅速な対応が可能である。
【０００３】
【発明が解決しようとする課題】
しかしながら、リン酸アンモニウムや縮合リン酸アンモニウム等に代表される現在の消火剤を着色剤、展着剤等と共に水に溶解しておくと、１カ月以上長期保存しておくと、化学消火剤として要をなさなくなるという欠点がある。例えば、展着剤としてデンプン系高分子化合物を用いると、該化合物の老化により、粘度の低下が起こる。また、展着剤として、例えば、ポリアクリルアミド、ポリアクリル酸ナトリウム、アクリルアミド・ジメチルアミノエチルアクリレート塩化メチル４級塩共重合体等の合成高分子化合物を使用すると、凝集したり或いは２層に分離してしまう。
本発明の課題は水に溶解して長期間保存しても、粘度の低下等を起こさない新規な一液型の水系化学消火剤を提供することにある。
【０００４】
【課題を解決するための手段】
本発明は、リン酸アンモニウム又は縮合リン酸アンモニウムと重合性二重結合含有化合物との重合物を有効成分とする水系化学消火剤に係る。
本発明によれば、リン酸アンモニウム又は縮合リン酸アンモニウムとアクリル酸等の重合性二重結合含有化合物とを重合させることにより、リン酸アンモニウム及び縮合リン酸アンモニウムの消火剤としての性能を低下させることなく、長期間保存しても、粘度の低下や凝集、分離等を起こすことがない。
更に本発明の化学消火剤の有効成分であるリン酸アンモニウム又は縮合リン酸アンモニウムと重合性二重結合含有化合物との重合物は、従来の消火剤よりも一層水溶性が良好で、水に早急且つ均一に溶解するという特性をも有している。
【０００５】
【発明の実施の形態】
本発明の水系消火剤においては、リン酸アンモニウム又は縮合リン酸アンモニウムと重合性二重結合含有化合物との重合物（以下特に断らない限り「重合物」と総称する）を有効成分とする。但し、消火性能や粘度の安定性の面からは、縮合リン酸アンモニウムと重合性二重結合含有化合物との重合物がより一層好ましい。
上記重合物は、例えば、重合開始剤の存在下で、リン酸アンモニウム又は縮合リン酸アンモニウムと重合性二重結合含有化合物とを反応させることにより製造できる。
【０００６】
縮合リン酸アンモニウムとしては公知のものを使用でき、例えば、正リン酸又は第一リン酸アンモニウムと尿素との縮合反応により得られる縮合リン酸アンモニウム、無水リン酸とアンモニウムとの縮合反応により得られる縮合リン酸アンモニウム等を挙げることができる。また、縮合リン酸アンモニウムの縮合度も特に制限はないが、その溶解性や難燃性能等を考慮すると、通常３〜１５０程度、好ましくは５〜１００程度とすればよい。縮合リン酸アンモニウムとしては市販品も使用できる。更に、縮合リン酸アンモニウムを水等に溶解したものを使用することができ、例えば、「エフアールＳ」〔大塚化学（株）製〕という商品名で市販されている水溶液等を挙げることができる。
【０００７】
重合性二重結合含有化合物としては公知のものを使用でき、例えば、オレフィン類等を挙げることができる。オレフィン類の具体例としては、例えば、アクリル酸、メタクリル酸、マレイン酸、イタコン酸等の不飽和カルボン酸、酢酸ビニル、ジビニルベンゼン等のビニル基含有化合物等を挙げることができる。また、（メタ）アクリル酸メチル、（メタ）アクリル酸エチル等のアルキル部分が炭素数１〜４程度の直鎖又は分岐鎖状のアルキル基である（メタ）アクリル酸アルキルエステル、ベンゼン環上にハロゲン原子、アルキル基、アルコキシ基、水酸基等の置換基の１種又は２種以上を有してもよい（メタ）アクリル酸フェニル等の（メタ）アクリル酸エステルも使用できる。更に、（メタ）アクリルアミド、アクリルニトリル、塩化ビニル、塩化ビニリデン、スチレン等も使用できる。これらの中でも、（メタ）アクリル酸、（メタ）アクリル酸エステル、（メタ）アクリル酸アミド等が好ましく、アクリル酸、アクリル酸アミド等が特に好ましい。重合性二重結合含有化合物の使用量は特に制限されず広い範囲から適宜選択することができるが、通常リン酸アンモニウム又は縮合リン酸アンモニウム１００重量部に対して１〜１０００重量部程度、好ましくは５〜５００重量部程度、より好ましくは１０〜５０重量部程度とすればよい。尚、重合性二重結合含有化合物の使用量を変更することにより、最終的に得られる本発明の化学消火剤の粘度を適宜調整することができる。
【０００８】
重合開始剤としては特に制限されず、水又は水と有機溶媒との混合溶媒に溶解又は分散し得るものであれば特に制限されず、例えば、クメンヒドロキシパーオキサイド等のヒドロキシパーオキサイド類、水溶性のパーオクソ硫酸カリウム、パーオクソ硫酸アンモニウム、過酸化水素、アゾビスイソブチロニトリル、アゾビスシクロヘキサンカルボニル等を挙げることができる。これらの中でも、アゾビスイソブチロニトリル等が好ましい。重合開始剤は、１種を単独で又は２種以上の併用で使用される。重合開始剤の使用量は特に制限されず、広い範囲から適宜選択できるが、通常重合性二重結合含有化合物に対して重合開始剤が０.０１〜５重量％程度、好ましくは０.０５〜１重量％程度となる割合で使用するのがよい。
リン酸アンモニウム又は縮合リン酸アンモニウムと重合性二重結合含有化合物との共重合反応は、重合開始剤の存在下、通常水中にて行なわれる。この時、溶媒中でのリン酸アンモニウム又は縮合リン酸アンモニウムの濃度は特に制限されず広い範囲から適宜選択できるが、通常１〜７０重量％程度、好ましくは１０〜５０重量％程度とすればよい。この重合反応は、通常５０〜９０℃程度、好ましくは７０〜８０℃程度の温度下に行なわれ、通常２０〜１２０分程度、好ましくは３０〜６０分程度で終了する。
このようにして得られる重合物を含む水溶液は、そのまま本発明の化学消火剤として使用することができる。或いは、該重合物を濾過、乾燥等の通常の分離手段に従って単離し、これを水に溶解して用いてもよい。本発明化学消火剤における、該重合物の濃度は特に制限されず広い範囲から適宜選択できるが、その粘度などを考慮すると、通常２〜２０重量％程度、好ましくは３〜１０重量％程度とすればよい。
更に本発明の化学消火剤には、その性能を損なわない範囲で、従来から常用されてきた添加剤、例えば、着色剤、展着剤等が含まれていてもよい。
【０００９】
【実施例】
以下に実施例及び比較例を挙げ、本発明を具体的に説明する。尚、以下において、「部」及び「％」とあるのは、特に断らない限り「重量部」及び「重量％」を意味するものとする。
【００１０】
実施例１
４０％縮合リン酸アンモニウムの水溶液（縮合度：４〜１０）１００部とアクリル酸 ５.５部の混合液中に重合開始剤〔商品名；ＡＣＶＡ、大塚化学（株）製〕０.０２８部を添加し、８０℃で２時間共重合させて、粘稠性のある透明な水溶液を製造した。２５℃でのＢ型粘度計（ローターＮo.２、６０ｒｐｍ）で１２０ｃｐｓの粘性を示し、pＨは６.７であった。
【００１１】
実施例２
実施例１で用いた４０％縮合リン酸アンモニウムの水溶液 １００部とアクリル酸アミド ５部の混合液中に重合開始剤〔大塚化学（株）製、商品名：ＡＣＶＡ〕０.０２８部を添加し、８０℃で２時間共重合させて、粘稠性のある透明な水溶液である本発明の化学消火剤を製造した。２５℃でのＢ型粘度計（ローターＮo.２、６０ｒｐｍ）で１２６ｃｐｓの粘性を示し、pＨは７.５であった。
【００１２】
実施例３
実施例１で用いた４０％縮合リン酸アンモニウムの水溶液に代えて第一リン酸アンモニウムの４０％水溶液を用いる以外は、実施例１と同様にして、本発明の化学消火剤を製造した。２５℃でのＢ型粘度計（ローターＮo.２、６０ｒｐｍ）で１５０ｃｐｓの粘性を示し、pＨは６.７であった。
【００１３】
実施例４
実施例１において、アクリル酸の使用量を６.３部に変更し、且つ重合開始剤の使用量を０.０３２部に変更する以外は、実施例１と同様にして、本発明の化学消火剤を製造した。２５℃でのＢ型粘度計（ローターＮo.２、６０ｒｐｍ）で２６０ｃｐｓの粘性を示し、pＨは６.５であった。
【００１４】
比較例１
実施例１で用いた４０％縮合リン酸アンモニウムの水溶液 ９９部とポリアクリルアミド（ノニオン系水溶性高分子、ＭＷ２００万）１部を混合して、粘度１２８ｃｐｓ、pＨ７.０の粘稠性のある透明な水溶液を製造した。
【００１５】
比較例２
ポリアクリルアミドに代えてポリアクリル酸ナトリウム（アニオン系高分子、ＭＷ ８００万）を使用する以外は、比較例１と同様にして、粘度１３０ｃｐｓ、pＨ６.８の粘稠性のある透明な水溶液を製造した。
【００１６】
比較例３
ポリアクリルアミドに代えてアクリルアミド・ジメチルアミノエチルアクリレート塩化メチル４級塩共重合体（カチオン系高分子、ＭＷ ５００万）を使用する以外は、比較例１と同様にして、粘度１２０ｃｐｓ、pＨ７.８の粘稠性のある透明な水溶液を製造した。
【００１７】
試験例１
実施例１〜４及び比較例１〜３で得られた化学消火剤を、４０℃の恒温機中にて２カ月保存し、その粘度の経時的変化を調べた。粘度（ｃｐｓ）の測定には、Ｂ型粘度計（ローターＮo.２、６０ｒｐｍ）を用いた。結果を表１に示す。
【００１８】
【表１】
表１から明らかなように、本発明の化学消火剤（実施例１〜４）は、長期間保存しても、一定の粘度を維持し、粘度安定性に優れている。一方、比較例１〜３は従来の展着剤（ノニオン系、カチオン系ないしアニオン系水溶性高分子化合物）を消火剤と共に溶解した水系消火剤であり、いずれも長期間保存すると粘度が低下し、粘度安定性が悪いことが判る。
尚、本発明の化学消火剤は、調製時の比較例１〜３の従来の化学消火剤と同程度又はそれ以上の消火性能を有していた。
【００２０】
【発明の効果】
本発明によれば、リン酸アンモニウム又は縮合リン酸アンモニウムとアクリル酸等の重合性二重結合含有化合物とを重合させることにより、リン酸アンモニウム及び縮合リン酸アンモニウムの消火剤としての性能を低下させることなく、長期間保存しても、粘度の低下や凝集、分離等を起こすことがない。
更に本発明の化学消火剤の有効成分であるリン酸アンモニウム又は縮合リン酸アンモニウムと重合性二重結合含有化合物との重合物は、従来の消火剤よりも一層水溶性が良好で、水に早急且つ均一に溶解するという特性をも有している。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a novel one-component aqueous chemical fire extinguisher.
[0002]
[Prior art]
When extinguishing a forest fire, it is usually a chemical made by dissolving a water-soluble polymer compound such as starch, gum or synthetic in water together with a fire extinguisher and colorant. Fire extinguishing agent is sprayed from a helicopter.
The chemical fire extinguisher is required to have excellent fire extinguishing performance, but it is also essential to have a certain degree of viscosity. If the viscosity is as low as water, even if sprayed from a helicopter, the fire extinguishing agent will not adhere to the fire extinguishing object such as trees or leaves, and the fire extinguishing performance will not be exhibited. Therefore, the spreading agent (thickening agent) is added to the chemical fire extinguishing agent. On the other hand, since fire extinguishing work is urgent, pre-dissolving fire extinguishing agents, coloring agents, spreading agents, etc. in water saves time and effort for preparing chemical extinguishing agents one by one. Is possible.
[0003]
[Problems to be solved by the invention]
However, if the current fire extinguisher typified by ammonium phosphate or condensed ammonium phosphate is dissolved in water together with the colorant, spreading agent, etc., it will be used as a chemical fire extinguishing agent if stored for a long period of time for one month or longer. There is a drawback that it is not necessary. For example, when a starch polymer compound is used as a spreading agent, the viscosity decreases due to aging of the compound. In addition, when a synthetic polymer compound such as polyacrylamide, sodium polyacrylate, acrylamide / dimethylaminoethyl acrylate methyl chloride quaternary salt copolymer is used as a spreading agent, it aggregates or separates into two layers. End up.
An object of the present invention is to provide a novel one-component aqueous chemical fire extinguisher that does not cause a decrease in viscosity even when dissolved in water and stored for a long period of time.
[0004]
[Means for Solving the Problems]
The present invention relates to an aqueous chemical fire extinguisher containing, as an active ingredient, a polymer of ammonium phosphate or condensed ammonium phosphate and a polymerizable double bond-containing compound.
According to the present invention, the performance of ammonium phosphate and condensed ammonium phosphate as a fire extinguishing agent is reduced by polymerizing ammonium phosphate or condensed ammonium phosphate and a polymerizable double bond-containing compound such as acrylic acid. Even if it is stored for a long time, it does not cause a decrease in viscosity, aggregation or separation.
Furthermore, the polymer of the ammonium phosphate or condensed ammonium phosphate, which is an active ingredient of the chemical fire extinguishing agent of the present invention, and a polymerizable double bond-containing compound has a better water solubility than conventional fire extinguishing agents, and it is quick to water. It also has the property of being uniformly dissolved.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
In the water-based fire extinguisher of the present invention, an active ingredient is a polymer of ammonium phosphate or condensed ammonium phosphate and a polymerizable double bond-containing compound (hereinafter collectively referred to as “polymer” unless otherwise specified). However, in terms of fire extinguishing performance and viscosity stability, a polymer of condensed ammonium phosphate and a polymerizable double bond-containing compound is even more preferable.
The polymer can be produced, for example, by reacting ammonium phosphate or condensed ammonium phosphate with a polymerizable double bond-containing compound in the presence of a polymerization initiator.
[0006]
As the condensed ammonium phosphate, known ones can be used. For example, the condensed ammonium phosphate can be obtained by a condensation reaction of normal phosphoric acid or primary ammonium phosphate and urea, or by a condensation reaction of anhydrous phosphoric acid and ammonium. Examples thereof include condensed ammonium phosphate. Also, the degree of condensation of condensed ammonium phosphate is not particularly limited, but considering its solubility and flame retardancy, it is usually about 3 to 150, preferably about 5 to 100. A commercial item can also be used as condensed ammonium phosphate. Furthermore, what melt | dissolved condensed ammonium phosphate in water etc. can be used, For example, the aqueous solution etc. which are marketed by the brand name of "F-S" [made by Otsuka Chemical Co., Ltd.] can be mentioned. .
[0007]
As the polymerizable double bond-containing compound, known compounds can be used, and examples thereof include olefins. Specific examples of olefins include unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic acid, and itaconic acid, and vinyl group-containing compounds such as vinyl acetate and divinylbenzene. In addition, (meth) acrylic acid alkyl ester whose alkyl moiety such as methyl (meth) acrylate and ethyl (meth) acrylate is a linear or branched alkyl group having about 1 to 4 carbon atoms, on the benzene ring A (meth) acrylic acid ester such as phenyl (meth) acrylate which may have one or two or more substituents such as a halogen atom, an alkyl group, an alkoxy group, and a hydroxyl group can also be used. Further, (meth) acrylamide, acrylonitrile, vinyl chloride, vinylidene chloride, styrene and the like can also be used. Among these, (meth) acrylic acid, (meth) acrylic acid ester, (meth) acrylic acid amide and the like are preferable, and acrylic acid, acrylic acid amide and the like are particularly preferable. The amount of the polymerizable double bond-containing compound is not particularly limited and can be appropriately selected from a wide range, but is usually about 1 to 1000 parts by weight, preferably 100 parts by weight of ammonium phosphate or condensed ammonium phosphate, It may be about 5 to 500 parts by weight, more preferably about 10 to 50 parts by weight. In addition, the viscosity of the chemical fire extinguisher of this invention finally obtained can be suitably adjusted by changing the usage-amount of a polymerizable double bond containing compound.
[0008]
The polymerization initiator is not particularly limited, and is not particularly limited as long as it can be dissolved or dispersed in water or a mixed solvent of water and an organic solvent. For example, hydroxy peroxides such as cumene hydroxy peroxide, water-soluble And potassium peroxosulfate, ammonium peroxosulfate, hydrogen peroxide, azobisisobutyronitrile, azobiscyclohexanecarbonyl, and the like. Among these, azobisisobutyronitrile and the like are preferable. A polymerization initiator is used individually by 1 type or in combination of 2 or more types. The amount of the polymerization initiator used is not particularly limited and can be appropriately selected from a wide range. Usually, the polymerization initiator is about 0.01 to 5% by weight, preferably 0.05 to 5% by weight based on the polymerizable double bond-containing compound. It is preferable to use at a ratio of about 1% by weight.
The copolymerization reaction of ammonium phosphate or condensed ammonium phosphate and a polymerizable double bond-containing compound is usually carried out in water in the presence of a polymerization initiator. At this time, the concentration of ammonium phosphate or condensed ammonium phosphate in the solvent is not particularly limited and can be appropriately selected from a wide range, but is usually about 1 to 70% by weight, preferably about 10 to 50% by weight. . This polymerization reaction is usually performed at a temperature of about 50 to 90 ° C., preferably about 70 to 80 ° C., and is usually completed for about 20 to 120 minutes, preferably about 30 to 60 minutes.
The aqueous solution containing the polymer thus obtained can be used as it is as the chemical fire extinguisher of the present invention. Alternatively, the polymer may be isolated according to ordinary separation means such as filtration and drying, and dissolved in water for use. The concentration of the polymer in the chemical fire extinguisher of the present invention is not particularly limited and can be appropriately selected from a wide range. However, considering its viscosity, it is usually about 2 to 20% by weight, preferably about 3 to 10% by weight. That's fine.
Furthermore, the chemical extinguishing agent of the present invention may contain additives conventionally used, for example, coloring agents, spreading agents, etc., as long as the performance is not impaired.
[0009]
【Example】
Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples. In the following, “parts” and “%” mean “parts by weight” and “% by weight” unless otherwise specified.
[0010]
Example 1
0.028 parts of polymerization initiator (trade name; ACVA, manufactured by Otsuka Chemical Co., Ltd.) in a mixed solution of 100 parts of an aqueous solution of 40% condensed ammonium phosphate (condensation degree: 4 to 10) and 5.5 parts of acrylic acid. Was added and copolymerized at 80 ° C. for 2 hours to produce a viscous transparent aqueous solution. A B-type viscometer (rotor No. 2, 60 rpm) at 25 ° C. showed a viscosity of 120 cps, and the pH was 6.7.
[0011]
Example 2
0.028 parts of a polymerization initiator (trade name: ACVA manufactured by Otsuka Chemical Co., Ltd.) was added to a mixed solution of 100 parts of an aqueous solution of 40% condensed ammonium phosphate used in Example 1 and 5 parts of acrylic amide. The chemical extinguishing agent of the present invention, which is a viscous transparent aqueous solution, was produced by copolymerization at 80 ° C. for 2 hours. A B-type viscometer (rotor No. 2, 60 rpm) at 25 ° C. showed a viscosity of 126 cps, and the pH was 7.5.
[0012]
Example 3
A chemical fire extinguisher of the present invention was produced in the same manner as in Example 1 except that a 40% aqueous solution of primary ammonium phosphate was used instead of the 40% condensed ammonium phosphate aqueous solution used in Example 1. A B-type viscometer (rotor No. 2, 60 rpm) at 25 ° C. showed a viscosity of 150 cps, and the pH was 6.7.
[0013]
Example 4
In Example 1, the chemical fire extinguishing of the present invention was carried out in the same manner as in Example 1 except that the amount of acrylic acid used was changed to 6.3 parts and the amount of polymerization initiator used was changed to 0.032 parts. An agent was produced. A B-type viscometer (rotor No. 2, 60 rpm) at 25 ° C. showed a viscosity of 260 cps, and the pH was 6.5.
[0014]
Comparative Example 1
99 parts of an aqueous solution of 40% condensed ammonium phosphate used in Example 1 and 1 part of polyacrylamide (nonionic water-soluble polymer, MW 2 million) were mixed to form a viscous transparent material having a viscosity of 128 cps and a pH of 7.0. An aqueous solution was prepared.
[0015]
Comparative Example 2
A viscous transparent aqueous solution having a viscosity of 130 cps and a pH of 6.8 is produced in the same manner as in Comparative Example 1 except that sodium polyacrylate (anionic polymer, MW 8 million) is used instead of polyacrylamide. did.
[0016]
Comparative Example 3
A viscosity of 120 cps and a pH of 7.8 is obtained in the same manner as in Comparative Example 1 except that acrylamide / dimethylaminoethyl acrylate methyl chloride quaternary salt copolymer (cationic polymer, MW 5 million) is used instead of polyacrylamide. A viscous clear aqueous solution was prepared.
[0017]
Test example 1
The chemical fire extinguishing agents obtained in Examples 1 to 4 and Comparative Examples 1 to 3 were stored in a thermostat at 40 ° C. for 2 months, and the change in viscosity over time was examined. For measurement of viscosity (cps), a B-type viscometer (rotor No. 2, 60 rpm) was used. The results are shown in Table 1.
[0018]
[Table 1]
As is clear from Table 1, the chemical extinguishing agent of the present invention (Examples 1 to 4) maintains a constant viscosity even when stored for a long period of time, and is excellent in viscosity stability. On the other hand, Comparative Examples 1 to 3 are water-based fire extinguishing agents obtained by dissolving a conventional spreading agent (nonionic, cationic or anionic water-soluble polymer compound) together with a fire extinguishing agent. It can be seen that the viscosity stability is poor.
In addition, the chemical fire extinguisher of this invention had a fire extinguishing performance comparable as or more than the conventional chemical fire extinguisher of the comparative examples 1-3 at the time of preparation.
[0020]
【The invention's effect】
According to the present invention, the performance of ammonium phosphate and condensed ammonium phosphate as a fire extinguishing agent is reduced by polymerizing ammonium phosphate or condensed ammonium phosphate and a polymerizable double bond-containing compound such as acrylic acid. Even if it is stored for a long time, it does not cause a decrease in viscosity, aggregation or separation.
Furthermore, the polymer of the ammonium phosphate or condensed ammonium phosphate, which is an active ingredient of the chemical fire extinguishing agent of the present invention, and a polymerizable double bond-containing compound has a better water solubility than conventional fire extinguishing agents, and it is quick to water. It also has the property of being uniformly dissolved.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03285897A JP3766871B2 (en) | 1997-01-31 | 1997-01-31 | Chemical extinguishing agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03285897A JP3766871B2 (en) | 1997-01-31 | 1997-01-31 | Chemical extinguishing agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10211296A JPH10211296A (en) | 1998-08-11 |
| JP3766871B2 true JP3766871B2 (en) | 2006-04-19 |
Family
ID=12370552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03285897A Expired - Fee Related JP3766871B2 (en) | 1997-01-31 | 1997-01-31 | Chemical extinguishing agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3766871B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030159836A1 (en) * | 2001-04-20 | 2003-08-28 | Keizou Kashiki | Fire-extingushing agent, water for fire extinguishing and method of fire extinguishing |
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1997
- 1997-01-31 JP JP03285897A patent/JP3766871B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
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| JPH10211296A (en) | 1998-08-11 |
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