DE945488C - Stabilizer for fire-extinguishing foams based on protein and method for its use for the purpose of producing foams that are resistant to foam-destroying liquids - Google Patents
Stabilizer for fire-extinguishing foams based on protein and method for its use for the purpose of producing foams that are resistant to foam-destroying liquidsInfo
- Publication number
- DE945488C DE945488C DET5071A DET0005071A DE945488C DE 945488 C DE945488 C DE 945488C DE T5071 A DET5071 A DE T5071A DE T0005071 A DET0005071 A DE T0005071A DE 945488 C DE945488 C DE 945488C
- Authority
- DE
- Germany
- Prior art keywords
- stabilizer
- foam
- protein
- foams
- liquids
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
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
- A62D1/0071—Foams
- A62D1/0078—Foams containing proteins or protein derivatives
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing Compositions (AREA)
Description
Stabilisator für Feuerlöschschäume auf Eiweißbasis und Verfahren zu seiner Anwendung zwecks Erzeugung von Schäumen, die gegen schaumzerstörende Flüssigkeiten beständig sind Vorliegende Erfindung bezieht sich auf einen Stabilisator und ein Verfahren zu seiner Anwendung, der in Verbindung mit Luftschaumbildnern auf Eiweißbasis einen stabilen, durch schaumzerstörende Flüssigkeiten wie Alkohole, Ester, Ketone u. ä. nicht zerstörbaren Schaum liefert. Als bekannt wird dabei vorausgesetzt, daß man auf der Grundlage von teilweise abgebauten Eiweißstoffen in Verbindung mit Schwermetallsalzen stabile und gegen Hitze widerstandsfähige Schäume nach dem Luftschaumverfahren im Kometrohr erzeugen kann. Diese Schäume eignen sich vorzugsweise zur Ablöschung von brennenden Flüssigkeiten. Trotz bester Löscheigenschaften «,-eisen sie den Nachteil auf, daß sie von einer Reihe von Flüssigkeiten, besonders solchen, die polare Gruppen enthalten, außerordentlich schnell zerstört werden und deshalb als Löschmittel für diese Flüssigkeiten nicht geeignet sind. Man hat verschiedentlich versucht, durch Zusätze zu diesen eiweißhaltigen Stammextrakten eine höhere Stabilität gegen schaumzerstörende Flüssigkeiten zu erzielen. Es wurden damit zwar Verbesserungen, aber keine optimale Wirkung erzielt.Stabilizer for fire-fighting foams on a protein basis and process too its application for the purpose of producing foams, which protect against foam-destroying liquids The present invention relates to a stabilizer and a Process for its application in connection with air-foaming agents based on protein a stable, foam-destroying liquids such as alcohols, esters, ketones and the like supplies non-destructible foam. It is assumed that on the basis of partially degraded proteins in connection with heavy metal salts stable and heat-resistant foams based on the air foam process im Comet tube can produce. These foams are preferably suitable for extinguishing burning liquids. Despite the best extinguishing properties «, they iron out the disadvantage on that they are made of a number of fluids, especially those that have polar groups contain, are destroyed extremely quickly and therefore used as an extinguishing agent for these liquids are not suitable. Various attempts have been made to get through Additions to these protein-containing stem extracts provide greater stability against foam-destroying Achieve liquids. It was an improvement, but not an optimal one Effect achieved.
Gemäß vorliegender Erfindung wird ein Stabilisator zur Erzielung einer hohen Beständigkeit von eiweißartigen Luftschaumbildnern gegen schaumzerstörende Flüssigkeiten dadurch gewonnen, daß man wäßrige Lösungen von Salzen oder Estern polymerer Mannuron- oder Galakfiuronsäuren mit wäßrigen Lösungen von sauren Salzen der Schwefel-oder Phosphorsäure oder von in wäßriger Lösung sauer reagierenden Salzen der genannten Säuren und der Salzsäure vermischt und die Mischung auf einen pa Wert zwischen 4 .und 6 .einstellt. Dieser Stabilisator wird' dem Schaumbildnerkonzentrat nicht von vornherein zugesetzt, sondern erst der verdünnten, etwa 3- bis 4@/o-igen Schaumbildnergebrauchslösung kurz vor der Verschäumung im Luftschaumstrahlrohr zugemischt. Der Stahilisatorzusatz beträgt je nach der Konzentration des Stabilisators und der gewünschten Widerstandsfähigkeit des Schaumes etwa o, i bis 5 °/o, bezogen auf das Volumen der verdünnten Schaumbildn-erlösung.According to the present invention, a stabilizer for achieving a high resistance of protein-like air foaming agents to foam-destroying ones Liquids obtained by using aqueous solutions of salts or esters polymeric mannuronic or galactic acid with aqueous solutions of acidic salts of sulfuric or phosphoric acid or of in aqueous solution angry reacting salts of the acids mentioned and the hydrochloric acid mixed and the mixture set to a pa value between 4 and 6. This stabilizer is added to the foaming agent concentrate not added from the outset, but only to the diluted, about 3 to 4% strength Foaming agent working solution mixed in shortly before foaming in the air foam nozzle. The amount of steel added depends on the concentration of the stabilizer and the desired resistance of the foam about 0.1 to 5%, based on the Volume of the diluted foaming agent solution.
Die stabilisierende Wirkung des genannten Gemisches wird entscheidend erhöht durch einen Zusatz von wasserlöslichen Salzen der Schwefelsäureester von Fettalkoholen mit einer Kohlenstoff atomzahl zwischen C7 und C25.The stabilizing effect of the mixture mentioned is crucial increased by the addition of water-soluble salts of the sulfuric acid ester of Fatty alcohols with a carbon number between C7 and C25.
Zur Bereitung des Stabilisators wird beispielsweise wie folgt verfahren. Man vermischt den Methylester der polymeren Galakturonsäure, wie °r im Pektin vorliegt, mit einer gesättigten Lösung von Natriumhydrogensulfat unter innigem Rühren und setzt diesem Gemisch io Volumteile einer 5o°/oigen Lösung des Triäthanolaminsalzes des Onanthalkoholschwefelsäu.reesters zu; darauf verdünnt man so weit mit Wasser, bis die entstehende Lösung eine solche Viskosität annimmt, daß sie sich von den im Feuerlöschwesen verwendeten Zumischern auch bei niedrigen Temperaturen zur verdünnten Schaummittellösung zumischen läßt.The procedure for preparing the stabilizer is as follows, for example. The methyl ester of the polymeric galacturonic acid, as found in pectin, is mixed, with a saturated solution of sodium hydrogen sulfate with thorough stirring and sets this mixture 10 parts by volume of a 50% solution of the triethanolamine salt of Onanthalkoholschwefelsäu.reesters to; then one dilutes with water so far, until the resulting solution assumes such a viscosity that it differs from the Admixers used in fire extinguishing systems can also be diluted at low temperatures Add foam concentrate solution.
Die erfindungsgemäß hergestellten Schäume sind von außerordentlicher Stabilität und werden beispielsweise von -Äthylalkohol im kalten und brennenden Zustand nicht angegriffen. Der Zerfall der erfindungsgemäß hergestellten Schäume ist bei Einwirkung von kaltem oder brennendem Alkohol nicht größer als der natürliche Schaumzerfall durch den Flüssigkeitsabluß aus dem Schaum.The foams produced according to the invention are extraordinary Stability and are, for example, of -ethyl alcohol in the cold and burning State not attacked. The disintegration of the foams produced according to the invention is not greater than the natural when exposed to cold or burning alcohol Foam disintegration due to the drainage of liquid from the foam.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET5071A DE945488C (en) | 1951-10-25 | 1951-10-25 | Stabilizer for fire-extinguishing foams based on protein and method for its use for the purpose of producing foams that are resistant to foam-destroying liquids |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DET5071A DE945488C (en) | 1951-10-25 | 1951-10-25 | Stabilizer for fire-extinguishing foams based on protein and method for its use for the purpose of producing foams that are resistant to foam-destroying liquids |
Publications (1)
Publication Number | Publication Date |
---|---|
DE945488C true DE945488C (en) | 1956-07-12 |
Family
ID=7544861
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DET5071A Expired DE945488C (en) | 1951-10-25 | 1951-10-25 | Stabilizer for fire-extinguishing foams based on protein and method for its use for the purpose of producing foams that are resistant to foam-destroying liquids |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE945488C (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE634794C (en) * | 1935-04-19 | 1936-09-03 | Minimax Akt Ges | Stabilization of fire-extinguishing foam produced by chemical means |
DE650194C (en) * | 1936-03-21 | 1937-09-13 | Minimax Akt Ges | Production of frost-proof, alkaline, aqueous protein solution as a foam component to generate air foam for fire extinguishing purposes |
DE668276C (en) * | 1936-02-23 | 1938-11-30 | I G Farbenindustrie Akt Ges | Production of fire extinguishing foam |
DE696113C (en) * | 1938-11-03 | 1940-09-11 | I G Farbenindustrie Akt Ges | Process for the production of foam-forming stock solutions for the production of fire-extinguishing air foam |
DE697646C (en) * | 1938-02-11 | 1940-10-21 | I G Farbenindustrie Akt Ges | Process for the production of aqueous fire-extinguishing foam trunk solutions |
FR968630A (en) * | 1948-06-29 | 1950-12-01 | Stop Fire Sa | Improvements to foaming bodies used in particular to fight alcohol and ketone fires, and their manufacture |
-
1951
- 1951-10-25 DE DET5071A patent/DE945488C/en not_active Expired
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE634794C (en) * | 1935-04-19 | 1936-09-03 | Minimax Akt Ges | Stabilization of fire-extinguishing foam produced by chemical means |
DE668276C (en) * | 1936-02-23 | 1938-11-30 | I G Farbenindustrie Akt Ges | Production of fire extinguishing foam |
DE650194C (en) * | 1936-03-21 | 1937-09-13 | Minimax Akt Ges | Production of frost-proof, alkaline, aqueous protein solution as a foam component to generate air foam for fire extinguishing purposes |
DE697646C (en) * | 1938-02-11 | 1940-10-21 | I G Farbenindustrie Akt Ges | Process for the production of aqueous fire-extinguishing foam trunk solutions |
DE696113C (en) * | 1938-11-03 | 1940-09-11 | I G Farbenindustrie Akt Ges | Process for the production of foam-forming stock solutions for the production of fire-extinguishing air foam |
FR968630A (en) * | 1948-06-29 | 1950-12-01 | Stop Fire Sa | Improvements to foaming bodies used in particular to fight alcohol and ketone fires, and their manufacture |
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