EP0229600B1 - Agent for extinguishing fires and for impregnating against fires - Google Patents

Agent for extinguishing fires and for impregnating against fires Download PDF

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Publication number
EP0229600B1
EP0229600B1 EP86850383A EP86850383A EP0229600B1 EP 0229600 B1 EP0229600 B1 EP 0229600B1 EP 86850383 A EP86850383 A EP 86850383A EP 86850383 A EP86850383 A EP 86850383A EP 0229600 B1 EP0229600 B1 EP 0229600B1
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EP
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Prior art keywords
agent
fire
fires
citric acid
extinguishing
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EP86850383A
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German (de)
French (fr)
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EP0229600A1 (en
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Harald Walter Schuler
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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
    • A62D1/0028—Liquid extinguishing substances
    • A62D1/0035—Aqueous solutions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K2200/00—Wooden materials to be treated
    • B27K2200/10—Articles made of particles or fibres consisting of wood or other lignocellulosic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/16—Inorganic impregnating agents
    • B27K3/20—Compounds of alkali metals or ammonium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/34—Organic impregnating agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds

Definitions

  • the present invention relates to a fire extinguishing agent and impregnation of organic materials against fire and comprises a water solution and a method for producing this agent.
  • water and water solutions as well as water-containing solutions have been used for a long time, which form foam when sprayed or heated.
  • water-containing solutions have also been used which, for. B. contain inorganic salts such as ammonium salts and phosphate or water glass.
  • citric acid salts of a specific composition for these two purposes have an extremely fire-extinguishing and fire-retardant effect.
  • the present invention thus relates to an agent for extinguishing fire and for impregnating organic material against fire, which comprises an aqueous solution, the agent being characterized in that the aqueous solution has a pH of 7.0-8.0 and from a solution of 300-350 g / l of citric acid, which contains an essentially equimolar amount of sodium and potassium in a mutual gram atom ratio of 0.6: 100 to 1.0: 100.
  • the invention also relates to a method for producing this agent, which is characterized in that 300-350 g
  • Citric acid and an equimolar amount of carbonate, hydrogen carbonate and / or hydroxide of sodium and potassium in a mutual gram-atom ratio of 0.6: 100 to 1.0: 100 can be dissolved in an amount of water up to 1 liter.
  • This agent is suitable for extinguishing fire and also for impregnating organic materials such as wood, fabric, foams etc.
  • the impregnation can also be carried out by immersing it in a bath of the agent, e.g. B. by pressure impregnation, or by spraying.
  • the weight of the fabric is best 2 - 15%. e.g. B. 5 - 10%, increased in the dried state.
  • the increase in weight is preferably 1-5%, e.g. B. 2 - 3%, in the dried state.
  • the agent When extinguished, the agent is sprayed directly against the fire source or in such a way that it is distributed over the fire source, e.g. B. in liquid fires.
  • the agent preferably has a pH of 7.4-7.0 and that its pH is preferably about 7.6.
  • the sodium to potassium gram atom ratio is best, 0.8: 100 to 0.9: 100, and preferably about 0.84 100.
  • the present composition is conveniently prepared at approximately the intended pH by preliminary tests showing the amounts of carbonate, bicarbonate and hydroxide that are to be used to achieve this calculated pH. Fine adjustment is then carried out by adding citric acid or hydroxide, preferably potassium hydroxide.
  • the agent as such is harmless and harmless and does not release any harmful substances even when heated or thermally broken up.
  • An unplaned wooden strip (50 x 50 x 500 mm) was impregnated by brushing with 25 ml of the liquid obtained according to Example 1. This bar was then painted with panel paint, exposed to rain for 20 hours, and showered three times with water. A particle board was impregnated with 200 ml of the liquid obtained according to Example 1 per m 2 . She was exposed to rain for 20 hours and showered with water five times.
  • a bar (100 x 100 x 500 mm) was filled with 100 ml of the liquid obtained in Example 1 impregnated. It was then exposed to moisture for 40 days.
  • a planed board 120 x 13 x 500 mm was impregnated with 250 ml / m 2 of the liquid obtained in Example 1. It was also exposed to moisture for 30 days.
  • the substances were tested with a gas flame after 24 hours and after 48 hours.
  • the gas flame was then held 10 cm from the fabric until holes in the fabric were burned. When the gas flame was removed, the fabric stopped burning.
  • Example 4 The same experiment as in Example 4 was repeated with a paper wallpaper which was brushed once with the liquid according to Example 1. When tested in the manner described in Example 4, the free-hanging wallpaper stopped burning when the gas flame was removed.
  • An ordinary corrugated cardboard box was immersed in the liquid according to Example 1 for 10 seconds. He took up an amount of 400 ml / m 2 . After drying for 36 hours, the box was tested for flame safety. If the flame was removed after 10 minutes, the fire extinguished was extinguished.
  • the liquid according to example 1 was tested as an extinguishing agent according to the proposal on Swedish standard SS1192, edition 6.
  • the density of the mixture was found to be 1.3. Textiles impregnated with it received a white coating and became quite stiff. This mixture is thus for impregnation z. B. of textiles and paper nothing particularly suitable.
  • the mixture obtained had a density of 1.35 kg / l.
  • Textiles and paper were impregnated with this mixture and dried for 12 hours with the aid of a heating element.
  • the impregnated samples were lighted with a gas lamp, the edges of the burned area glowing a shorter time after the flame was removed. This mixture was therefore not particularly suitable as an impregnating agent.
  • a sediment was also formed in this mixture while standing, even if the amount was slightly less than in the previous example.
  • the mixture is not suitable for fire extinguishers.
  • the density of the mixture became 1.36 kg / l and was adjusted to 1.3 with water.
  • the mixture was not suitable for impregnating textiles or paper. If this mixture and the agent according to Example 1 were mixed in the amounts of 40% and 60%, a good effect in extinguishing a fire of z. B. 5 l of diesel oil and 3 kg of dry wood after a combustion time of 5 minutes.
  • an agent with a composition according to the invention gives a better effect or does not have the disadvantages that the mixtures of citrate have in other proportions. It is also found that an acetate mixture as such is unsuitable for impregnation and has not had the same quenching effect as the present agent.

Abstract

An agent (I) for fire-extinguishing and for fire-proofing organic materials comrpises an aq. soln. of pH 7.0-8.0 contg. 300-350 g/l citric acid (II) with addn. of an equimol. amt. of Na and K in the mol. ratio of 0.6-1.0:100. (I) is prepd. by dissolving 300-350 g (II) and an equimol. amt. of Na and K carbonate, bicarbonate, or hydroxide (Na:K ratio as above) in 1:1 water, and adjusting the pH as above with (II) or the other components as necessary. Pref. pH is 7.6 and Na:K ratio is 0.84:100.

Description

Die vorliegende Erfindung betrifft ein Mittel Feuerlöschung und Imprägnierung von organischen Materialien gegen Brand und umfasst eine Wasserlösung und ein Verfahren zur Herstellung von diesem Mittel.The present invention relates to a fire extinguishing agent and impregnation of organic materials against fire and comprises a water solution and a method for producing this agent.

Zur Feuerlöschung hat man schon lange Wasser und Wasserlösungen sowie wasserhaltige Lösungen verwendet, die beim Spritzen oder bei Erhitzung Schaum bilden. Zur lmprägnierung hat man ebenso wasserhaltige Lösungen verwendet, die z. B. anorganische Salze wie Ammoniumsalze und Phosphat oder auch Wasserglas enthalten.For fire extinguishing, water and water solutions as well as water-containing solutions have been used for a long time, which form foam when sprayed or heated. For impregnation, water-containing solutions have also been used which, for. B. contain inorganic salts such as ammonium salts and phosphate or water glass.

Es wurde jetzt überraschenderweise gefunden, dass Zitronensäuresalze von einer spezifischen Zusammansetzung für diese beiden Zwecke eine ausserordentlich feuerlöschende und brandhemmende Wirkung haben.It has now surprisingly been found that citric acid salts of a specific composition for these two purposes have an extremely fire-extinguishing and fire-retardant effect.

Die vorliegende Erfindung betrifft somit ein Mittel zur Feuerlöschung und zur Imprägnierung von organischem Material gegen Brand, das eine wässrige Lösung umfasst, wobei das Mittel dadurch gekennzeichnet wird, dass die wässrige Lösung einen pH von 7,0 - 8,0 hat und aus einer Lösung von 300 - 350 g/I Zitronensäure besteht, die eine dazu im wesentlichen äquimolare Menge Natrium und Kalium in einem gegenseitigen Grammatom-Verhältnis von 0,6 : 100 bis 1,0 : 100 enthält.The present invention thus relates to an agent for extinguishing fire and for impregnating organic material against fire, which comprises an aqueous solution, the agent being characterized in that the aqueous solution has a pH of 7.0-8.0 and from a solution of 300-350 g / l of citric acid, which contains an essentially equimolar amount of sodium and potassium in a mutual gram atom ratio of 0.6: 100 to 1.0: 100.

Die Erfindung betrifft auch ein Verfahren zur Herstellung von diesem Mittel, das dadurch gekennzeichnet wird, dass 300 - 350 gThe invention also relates to a method for producing this agent, which is characterized in that 300-350 g

Zitronensäure und eine dazu äquimolare Menge Karbonat, Hydrogenkarbonat und/oder Hydroxid von Natrium und Kalium in einem gegenseitigen Grammatom-Verhältnis von 0,6 : 100 bis 1,0 : 100 in einer Menge Wasser bis auf 1 I gelöst werden.Citric acid and an equimolar amount of carbonate, hydrogen carbonate and / or hydroxide of sodium and potassium in a mutual gram-atom ratio of 0.6: 100 to 1.0: 100 can be dissolved in an amount of water up to 1 liter.

Dieses Mittel eignet sich zur Feuerlöschung und auch zur Imprägnierung von organischen Materialien, wie Holz, Stoff, Schaumstoffen etc. Die Imprägnierung kann auch durch versenken in ein Bad des Mittels erfolgen, z. B. durch Druckimprägnierung, oder durch Aufspritzen. Bei Imprägnierung des Stoffes wird das Gewicht des Stoffes am besten 2 - 15 %. z. B. 5 - 10 %, in getrocknetem Zustande erhöht. Bei Imprägnierung von Holz ist die Gewichtserhöhung vorzugsweise 1 - 5 %, z. B. 2 - 3 %, in getrocknetem Zustande. Bei einer Imprägnierung in diesem Bereiche (400 g Imprägnierungsflüssigkeit per m2 Fläcke) wurde mit einer Spanplatte von 10 mm und mit kieferner Bohle eine Feuersicherkeit erzielt, die die Forderungen für Oberflächenschichten Klasse 11 nach SIS 02 48 23 (NT FIRE 004) erfüllt. Bei Prüfung von 5 Min. in einer standardisierten Brennkammer überschritt die Rauchgastemperaturkurve nicht die Grenzkurve für Klasse II und die Lichtabsorption nicht 20 % (Zeitmittelwert höchstens 30 % zulässig).This agent is suitable for extinguishing fire and also for impregnating organic materials such as wood, fabric, foams etc. The impregnation can also be carried out by immersing it in a bath of the agent, e.g. B. by pressure impregnation, or by spraying. When the fabric is impregnated, the weight of the fabric is best 2 - 15%. e.g. B. 5 - 10%, increased in the dried state. When impregnating wood, the increase in weight is preferably 1-5%, e.g. B. 2 - 3%, in the dried state. In the case of impregnation in this area (400 g of impregnation liquid per m 2 of flakes), fire protection was achieved with a chipboard of 10 mm and with pine planks that met the requirements for class 11 surface layers according to SIS 02 48 23 (NT FIRE 004). When testing for 5 minutes in a standardized combustion chamber, the flue gas temperature curve did not exceed the limit curve for class II and the light absorption did not exceed 20% (time average maximum 30% permitted).

Bei Löschung wird das Mittel direkt gegen den Feuerherd gespritzt oder derart, dass es über den Brandherd verteilt wird, z. B. bei Flüssigkeitsbränden.When extinguished, the agent is sprayed directly against the fire source or in such a way that it is distributed over the fire source, e.g. B. in liquid fires.

Es hat sich erwiesen, dass das Mittel vorzugsweise einen pH von 7,4 - 7,0 hat und dass sein pH vorzugsweise etwa 7,6 ist. Das Grammatom-Verhältnis Natrium zu Kalium ist am besten, 0,8 : 100 bis 0,9 : 100 und vorzugsweise etwa 0,84 100.It has been found that the agent preferably has a pH of 7.4-7.0 and that its pH is preferably about 7.6. The sodium to potassium gram atom ratio is best, 0.8: 100 to 0.9: 100, and preferably about 0.84 100.

Das vorliegende Mittel wird zweckmässig mit annähernd beabsichtigtem pH dadurch hergestellt, dass Vorversuche die Mengen Karbonat, Hydrogenkarbonat und Hydroxid gezeigt haben, die zur Erzielung von diesem berechneten pH verwendet werden sollen. Feinjustierung erfolgt danach durch Zusatz von Zitronensäure oder Hydroxid, vorzugsweise Kaliumhydroxid.The present composition is conveniently prepared at approximately the intended pH by preliminary tests showing the amounts of carbonate, bicarbonate and hydroxide that are to be used to achieve this calculated pH. Fine adjustment is then carried out by adding citric acid or hydroxide, preferably potassium hydroxide.

Das Mittel als solches ist ungefährlich und unschädlich und gibt auch bei Erwärmung oder thermischer Zerteilung keine schädlichen Stoffe ab.The agent as such is harmless and harmless and does not release any harmful substances even when heated or thermally broken up.

Die Herstellung und Verwendung vom vorliegenden Mittel werden in den folgenden Beispielen gezeigt.The preparation and use of the present agent are shown in the following examples.

Beispiel 1example 1

3,30 kg Zitronensäure, 2,05 kg Kaliumhydrogenkarbonat und 25 g Kristallsoda wurden 5 I Wasser zugesetzt. Alles wurde umgerührt und das Volumen wurde auf 10 I eingestellt, wonach pH mit Holfe von fester Zitronensäure auf 7,6 eingestellt wurde. Die erhaltene Lösung wurde zur Imprägnierung und Löschung verwendet.3.30 kg of citric acid, 2.05 kg of potassium hydrogen carbonate and 25 g of crystal soda were added to 5 l of water. Everything was stirred and the volume adjusted to 10 liters, after which pH was adjusted to 7.6 with solid citric acid. The solution obtained was used for impregnation and quenching.

Beispiel 2Example 2

Eine ungehobelte Holzleiste (50 x 50 x 500 mm) wurde durch Aufpinseln mit 25 ml der gemäss Beispiel 1 erhaltenen Flüssigkeit imprägniert. Diese Leiste wurde danach mit Paneelfarbe gemalt, Regen 20 Stunden lang ausgesetzt und dreimal mit Wasser geduscht. Eine Spanplatte wurde mit 200 ml der gemäss Beispiel 1 erhaltenen Flüssigkeit per m2 imprägniert. Sie wurde Regen 20 Stunden lang ausgesetzt und mit Wasser fünfmal geduscht.An unplaned wooden strip (50 x 50 x 500 mm) was impregnated by brushing with 25 ml of the liquid obtained according to Example 1. This bar was then painted with panel paint, exposed to rain for 20 hours, and showered three times with water. A particle board was impregnated with 200 ml of the liquid obtained according to Example 1 per m 2 . She was exposed to rain for 20 hours and showered with water five times.

Der Effekt der Imprägnierung wurde mit Gasolbrenner geprüft, wobei die Gasflamme gegen das Material 10 Minuten lang 10 cm entfernt von Material gehalten wurde. Feuer entstand in keinem der Materialien, sondern erlosch, wenn die Gasflamme weggenommen wurde.The effect of the impregnation was checked with a gas oil burner, the gas flame being held against the material for 10 minutes 10 cm away from the material. Fire did not arise in any of the materials, but extinguished when the gas flame was removed.

Beispiel 3Example 3

Ein Balken (100 x 100 x 500 mm) wurde mit 100 ml der gemäss Beispiel 1 erhaltenen Flüssigkeit imprägniert. Er wurde danach Feuchte 40 Tage lang ausgesetzt.A bar (100 x 100 x 500 mm) was filled with 100 ml of the liquid obtained in Example 1 impregnated. It was then exposed to moisture for 40 days.

Ein gehobeltes Brett (120 x 13 x 500 mm) wurde mit 250 ml/m2 der gemäss Beispiel 1 erhaltenen Flüssigkeit imprägniert. Es wurde auch Feuchte 30 Tage lang ausgesetzt.A planed board (120 x 13 x 500 mm) was impregnated with 250 ml / m 2 of the liquid obtained in Example 1. It was also exposed to moisture for 30 days.

Nachdem der Balken sowohl als auch das Brett 5 Tage lang getrocknet worden war, wurden sie in derselben Weise wie im Beispiel 2 geprüft. Auch hier enstand kein Brand. Dieselbe Prüfung wurde auch nach 40 Tagen mit demselben Resultat ausgeführt.After the bar and board were dried for 5 days, they were tested in the same manner as in Example 2. There was no fire here either. The same test was carried out after 40 days with the same result.

Beispiel 4Example 4

Verschiedene Möbelstoffe wurden geprüft. Ein Stoff bestand aus 75 % Rayon und 25 % Baumwolle, ein anderer aus 100 % Akryl und ein dritter aus 100 % Dralon. Stoffe von verschiedenen Farben wurden ausserdem geprüft. Die Imprägnierungsmenge war 300 ml/m2 und die gemäss Beispiel 1 hergestellte Flüssigkeit wurde verwendet. Der Stoff erfuhr nur in einigen Fällen eine geringe Farbenveränderung und in einigen Fällen wurde der Stoff etwas steifer.Various upholstery fabrics have been tested. One fabric consisted of 75% rayon and 25% cotton, another made of 100% acrylic and a third made of 100% dralon. Fabrics of different colors have also been tested. The amount of impregnation was 300 ml / m 2 and the liquid prepared according to Example 1 was used. The fabric only changed slightly in some cases and in some cases the fabric became a little stiffer.

Die Stoffe wurden mit Gasflamme nach 24 Stunden und nach 48 Stunden geprüft. Die Gasflamme wurde dann in einer Entfernung von 10 cm vom Stoffe gehalten, bis Löcher im Stoffe gebrannt worden waren. Wenn die Gasflamme weggenommen wurde, hörte der Stoff auf zu brennen.The substances were tested with a gas flame after 24 hours and after 48 hours. The gas flame was then held 10 cm from the fabric until holes in the fabric were burned. When the gas flame was removed, the fabric stopped burning.

Beispiel 5Example 5

Derselbe Versuch wie im Beispiel 4 wurde mit einer Papiertapete wiederholt, die einmal mit der Flüssigkeit gemäss Beispiel 1 gepinselt wurde. Bei Prüfung in der im Beispiel 4 beschriebenen Weise hörte die freihängende Tapete auf zu brennen, wenn die Gasflamme weggenommen wurde.The same experiment as in Example 4 was repeated with a paper wallpaper which was brushed once with the liquid according to Example 1. When tested in the manner described in Example 4, the free-hanging wallpaper stopped burning when the gas flame was removed.

Beispiel 6Example 6

Ein gewöhnlicher Kasten aus gewellter Pappe wurde in die Flüssigkeit gemäss Beispiel 1 10 Sekunden lang getaucht. Er nahm dabei eine Menge von 400 ml/m2 auf. Nach Trocknen 36 Stunden lang wurde der Kasten mit Bezug auf Flammensicherheit geprüft. Wenn die Flamme nach 10 Minuten weggenommen wurde, erlosch das Feuer, das von der Flamme unterhalten wurde.An ordinary corrugated cardboard box was immersed in the liquid according to Example 1 for 10 seconds. He took up an amount of 400 ml / m 2 . After drying for 36 hours, the box was tested for flame safety. If the flame was removed after 10 minutes, the fire extinguished was extinguished.

Beispiel 7Example 7

Die Flüssigkeit gemäss Beispiel 1 wurde als Löschmittel gemäss Vorschlag on schwedischem Standard SS1192, Ausgabe 6, geprüft. Das vorliegende Löschmittel erfüllte dabei die Forderungeh der Klasse A1.The liquid according to example 1 was tested as an extinguishing agent according to the proposal on Swedish standard SS1192, edition 6. The extinguishing agent at hand fulfilled the requirements of class A1.

Prüfungen an imprägnierten Brettern sind auch durchgeführt worden, die in Benzinbränden 8 Minuten lang gelegen sind. Die Bretter wurden dabei nicht angezündet, so dass sie nach Ausnahme weiterbrannten. Sie wurden auch nicht wieder angezündet.Tests on impregnated boards have also been carried out, which are located in gasoline fires for 8 minutes. The boards were not lit, so that they continued to burn after an exception. They were also not set on fire again.

Beispiel 8 (Vergleichsbeispiel)Example 8

Als Vergleich wurde ein Gemisch von

Figure imgb0001
zubereitet. pH wurde auf 7,5 eingestellt.A mixture of
Figure imgb0001
 prepared. pH was adjusted to 7.5.

Die Dichte des Gemisches erwies sich als 1,3. Damit imprägnierte Textilien erhielten einen weissen Belag und wurden ziemlich steif. Dieses Gemisch ist somit zur Imprägnierung z. B. von Textilien und Papier nichts besonders geeignet.The density of the mixture was found to be 1.3. Textiles impregnated with it received a white coating and became quite stiff. This mixture is thus for impregnation z. B. of textiles and paper nothing particularly suitable.

Nach Stehen über Nacht in einem Behälter hatte sich ein ziemlich grosser Bodensatz (etwa 25 % des totalen Trockensubstanzgehalts) abgesetzt. Das Gemisch ist somit nicht zur Verwendung in einem Feuerlöschgerät geeignet.After standing overnight in a container, a fairly large sediment had settled (about 25% of the total dry matter content). The mixture is therefore not suitable for use in a fire extinguisher.

Beispiel 9 (Vergleichsbeispiel)Example 9 (comparative example)

Zu Vergleichzwecken wurde ein Gemisch von

Figure imgb0002
zubereitet. pH wurde auf 7,5 eingestellt.For comparison purposes, a mixture of
Figure imgb0002
 prepared. pH was adjusted to 7.5.

Das erhaltehe Gemisch hatte eine Dichte von 1,35 kg/l.The mixture obtained had a density of 1.35 kg / l.

Mit diesem Gemisch wurden Textilien und Papier imprägniert und mit Hilfe eines Heizelements während 12 Stunden getrocknet. Die imprägnierten Proben wurden mit einer Gasollampe angezindet, wobei die Kanten der gebrannten Stelle eine Kürzere Zeit nach Wegnahme der Flamme glühten. Dieses Gemisch erwies sich somit auch nicht als Imprägnierungsmittel besonders geeignet.Textiles and paper were impregnated with this mixture and dried for 12 hours with the aid of a heating element. The impregnated samples were lighted with a gas lamp, the edges of the burned area glowing a shorter time after the flame was removed. This mixture was therefore not particularly suitable as an impregnating agent.

Auch bei diesem Gemisch wurde ein Bodensatz im Stehen gebildet, auch wenn die Menge etwas weniger als im vorhergehenden Beispiel war. Das Gemisch ist nicht zu Feuerlöschgeräten geeignet.A sediment was also formed in this mixture while standing, even if the amount was slightly less than in the previous example. The mixture is not suitable for fire extinguishers.

Beispiel 10 (Vergleichsbeispiel)Example 10 (comparative example)

Im diesem Beispiel wurde ein Gemisch von

Figure imgb0003
zubereitet. pH wurde auf 7,5 mit Zitronensäure eingestellt.In this example, a mixture of
Figure imgb0003
 prepared. pH was adjusted to 7.5 with citric acid.

Die Dichte des Gemisches wurde 1,36 kg/I und wurde auf 1,3 mit Wasser eingestellt. Das Gemisch war nicht zur Imprägnierung von Textilien oder Papier geeignet. Wenn dieses Gemisch und das Mittel gemäss Beispiel 1 in den Mengen 40 % bzw. 60 % gemischt wurden, wurde eine gute Wirkung beim Löschen eines Feuers von z. B. 5 I Dieselöl und 3 kg trockenem Holz nach einer Verbrennungszeit von 5 Min. erzielt.The density of the mixture became 1.36 kg / l and was adjusted to 1.3 with water. The mixture was not suitable for impregnating textiles or paper. If this mixture and the agent according to Example 1 were mixed in the amounts of 40% and 60%, a good effect in extinguishing a fire of z. B. 5 l of diesel oil and 3 kg of dry wood after a combustion time of 5 minutes.

Es geht somit hervor, dass ein Mittel mit einer erfindungsgemässen Zusammensetzung einen besseren Effekt gibt bzw. die Nachteile nicht mitbringt, die Gemische von Zitrat in anderen Proportionen hat. Man findet auch, dass ein Azetatgemisch als solches zur Imprägnierung ungeeignet ist und dieselbe löschende Wirkung wie das vorliegende Mittel auch nicht hatte.It can thus be seen that an agent with a composition according to the invention gives a better effect or does not have the disadvantages that the mixtures of citrate have in other proportions. It is also found that an acetate mixture as such is unsuitable for impregnation and has not had the same quenching effect as the present agent.

Claims (2)

1. An agent for extinguishing fire and for fire resistent impregnation of organic materials comprising an aqueous solution, characterized in that said aqueous solution has a pH in the range of 7.0 - 8.0 and consists of a solution of 300 - 350 grams/I citric acid which contains an amount substantionally equimolar thereto of sodium and potassium in a mutual ratio based on gram atoms of from 0.6 : 100 to 1.0 : 100.
2. A method of preparing the agent of claim 1, characterized in that 300 - 350 grams citric acid and an equimolar amount of carbonate, hydrogen carbonate and/or hydroxide of sodium or potassium in a mutual gram atomic ratio of from 0.6 : 100 to 1.0 100 are dissolved in an amount of water up to 1 liter, whereafter the pH is adjusted to the range of 7.0 - 8.0 with citric acid or a carbonate, hydrogen carbonate and/or hydroxide of sodium or potassium.
EP86850383A 1985-11-05 1986-11-04 Agent for extinguishing fires and for impregnating against fires Expired EP0229600B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86850383T ATE42904T1 (en) 1985-11-05 1986-11-04 FIRE EXTINGUISHING AND WATERPROOFING AGENT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8505207A SE457145B (en) 1985-11-05 1985-11-05 Means for extinguishing fires and for impregnating organic matter containing sodium and potassium citrate
SE8505207 1985-11-05

Publications (2)

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EP0229600A1 EP0229600A1 (en) 1987-07-22
EP0229600B1 true EP0229600B1 (en) 1989-05-10

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US (1) US4804482A (en)
EP (1) EP0229600B1 (en)
AT (1) ATE42904T1 (en)
DE (1) DE3663226D1 (en)
ES (1) ES2008094B3 (en)
FI (1) FI864503A (en)
GR (1) GR3000059T3 (en)
SE (1) SE457145B (en)

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* Cited by examiner, † Cited by third party
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AU615140B2 (en) * 1989-05-09 1991-09-19 Chubb Australia Limited Fire extinguishing composition
US5157740A (en) * 1991-02-07 1992-10-20 Unisys Corporation Method for background suppression in an image data processing system
US5091097A (en) * 1991-06-05 1992-02-25 Old Firehand Corporation Fire extinguishing and inhibiting material
GB2257042B (en) * 1991-07-04 1995-04-12 Graviner Ltd Kidde Fire extinguishing and explosion suppressant substances and method
US6139775A (en) * 1994-11-04 2000-10-31 Hazard Control Technologies, Inc. Compositions and methods for treating hydrocarbon materials
US5945026A (en) * 1994-11-04 1999-08-31 Hazard Control Technologies, Inc. Composition and methods for firefighting hydrocarbon fires
PT1370330E (en) * 2001-03-13 2006-05-31 Franz Howorka FIRE EXTINGUISHING AGENT AND IMPREGNATION MATERIAL
KR100457808B1 (en) * 2002-01-18 2004-11-18 주식회사 파이어앤텍 Environment-friendly neuter loaded stream extinguishant for general fire and method for preparing the same
AU2002950614A0 (en) * 2002-08-07 2002-09-12 Jens Birger Nilsson A flame retardant
DK181091B1 (en) * 2021-05-07 2022-12-09 Noignis Aps Flame Retardant Composition

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US1895530A (en) * 1928-02-27 1933-01-31 Fyr Fyter Co Fire extinguisher
US1895692A (en) * 1928-02-27 1933-01-31 Fyr Fyter Co Fire extinguishing composition
US1863321A (en) * 1931-07-18 1932-06-14 Ralph W Austin Fire extinguisher charge
US4169827A (en) * 1975-11-22 1979-10-02 Akzona Incorporated Flame resistant and self-extinguishing polymer compositions
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US4695594A (en) * 1986-08-27 1987-09-22 General Electric Company Modified flame retardant polyphenylene ether resins having improved foamability and molded articles made therefrom

Also Published As

Publication number Publication date
FI864503A0 (en) 1986-11-05
EP0229600A1 (en) 1987-07-22
ATE42904T1 (en) 1989-05-15
US4804482A (en) 1989-02-14
GR3000059T3 (en) 1990-10-31
FI864503A (en) 1987-05-06
SE8505207D0 (en) 1985-11-05
DE3663226D1 (en) 1989-06-15
SE8505207L (en) 1987-05-06
SE457145B (en) 1988-12-05
ES2008094B3 (en) 1989-07-16

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