GB1583020A - Foaming compositions - Google Patents
Foaming compositions Download PDFInfo
- Publication number
- GB1583020A GB1583020A GB12935/78A GB1293578A GB1583020A GB 1583020 A GB1583020 A GB 1583020A GB 12935/78 A GB12935/78 A GB 12935/78A GB 1293578 A GB1293578 A GB 1293578A GB 1583020 A GB1583020 A GB 1583020A
- Authority
- GB
- United Kingdom
- Prior art keywords
- composition
- amine
- foam
- weight
- carbon atoms
- 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
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- 239000000203 mixture Substances 0.000 title claims description 60
- 238000005187 foaming Methods 0.000 title claims description 12
- 239000006260 foam Substances 0.000 claims description 31
- 150000001412 amines Chemical class 0.000 claims description 22
- 239000004094 surface-active agent Substances 0.000 claims description 21
- 125000004432 carbon atom Chemical group C* 0.000 claims description 20
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 claims description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 14
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 12
- -1 carbocyclic amine Chemical class 0.000 claims description 11
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 10
- 239000011737 fluorine Substances 0.000 claims description 10
- 229910052731 fluorine Inorganic materials 0.000 claims description 10
- 238000009472 formulation Methods 0.000 claims description 10
- 125000002768 hydroxyalkyl group Chemical group 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000004215 Carbon black (E152) Substances 0.000 claims description 7
- 229930195733 hydrocarbon Natural products 0.000 claims description 7
- 150000002430 hydrocarbons Chemical class 0.000 claims description 7
- 125000002015 acyclic group Chemical group 0.000 claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims description 6
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 230000008033 biological extinction Effects 0.000 claims description 5
- 239000012141 concentrate Substances 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 239000013535 sea water Substances 0.000 claims description 4
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 claims description 3
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 claims description 3
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 claims description 3
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 claims description 3
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 3
- 150000003141 primary amines Chemical class 0.000 claims description 3
- 150000003335 secondary amines Chemical class 0.000 claims description 3
- 150000003512 tertiary amines Chemical class 0.000 claims description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 2
- 239000012964 benzotriazole Substances 0.000 claims description 2
- 239000001110 calcium chloride Substances 0.000 claims description 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 2
- 235000011152 sodium sulphate Nutrition 0.000 claims description 2
- BJFLSHMHTPAZHO-UHFFFAOYSA-N benzotriazole Chemical compound [CH]1C=CC=C2N=NN=C21 BJFLSHMHTPAZHO-UHFFFAOYSA-N 0.000 claims 1
- 239000004088 foaming agent Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 5
- 239000003651 drinking water Substances 0.000 description 4
- 235000020188 drinking water Nutrition 0.000 description 4
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 3
- 150000008051 alkyl sulfates Chemical class 0.000 description 3
- 125000000129 anionic group Chemical group 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000005263 alkylenediamine group Chemical group 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 125000005010 perfluoroalkyl group Chemical group 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000069 prophylactic effect Effects 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing Compositions (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
(54) FOAMING COMPOSITIONS
(71) We, HOECHST AKTIENGESELLSCHAFT, a body corporate organised according to the laws of the Federal Republic of Germany, of 6230 Frankfurt (Main) 80, Postfach 80 03 20, Federal Republic of Germany, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:
The present invention relates to a foaming concentrate for fire extinguishing purposes which shows an improved anticorrosive behavior.
Aqueous air foams have been successfully used for years for fighting extensive fires of liquids, but also for the prophylactic covering in the fields of the chemical industry and the mineral oil industry, on airports and also for water-ways and rail routes. In the beginning there were used only heavy foams on the basis of hydrolyzed proteins with a foam density of from 0.1 to 0.15 kg/1. However, for about 10 years use has also been made of so-called medium and light foams having a foam density in the range of from 0.03 to 0.001 kg/ 1 on the basis of surface-active synthetic foaming agents. The synthetic foaming agents have also provided to be suitable for producing heavy foam in the fire fighting, however. Generally, the portion of synthetic foaming agents in fire fighting and fire prevention appears to be increasing.
Protein foaming agents for the preparation of aqueous air foams may be stored for a prolonged time in unprotected steel containers. However, it has become evident that for the prolonged storage of synthetic foaming agents there may be used only plastic tanks or tanks of stainless steel, since containers made of unalloyed steel are corroded within a relatively short time. This corrosive attack is to be attributed to the presence of synthetic (non-ionogenic or cationic, but especially anionic) surfactants (example: alkyl sulfates and alkyl ether sulfates).
A similar, but stronger corrosion is caused by surfactants having perfluoroalkyl groups.
In view of the expenses involved, an exchange of existing tank containers for stainless steel containers, especially in fire fighting vehicles, is unfeasible.
It is therefore an objective of the present invention to formulate a synthetic foaming agent for producing light, medium and heavy foam for fire extinguishing purposes, which agent does not show any corrosive effect in the liquid space or in the gas space when being stored in unalloyed steel tanks, however, whose effect with regard to foam production and fire extinguishing is equal to that of the known foaming agents.
The present invention provides aqueous foaming agents which have a chloride content of less than 0. 1% by weight and which contain a synthetic surfactant as foaming component and from 5 to 30 %by weight, calculated on the composition. of a saturated primary, secondary or tertiary amine in free form or in the form of a salt with a weak acid. These compositions are marked by a reduced corrosive effect on unalloyed steel. This effect becomes particularly evident in cases where the chloride content of the foaming composition (agent) is less than 0.04 % by weight. Particularly favorable results are obtained with chloride contents of less than 0.015 % by weight. An effect similar to that of the chloride is produced by equivalent amounts of bromide and iodide which may be introduced as anions, for example, when using cationic surfactants.In the case of chloride contents of more than 0.3 %, the anticorrosive effect of the amines added is only insignificant.
From German Offenlegungsschrift No. 15 46 500 foaming agent formulations have been known which contain up to 0.5 % by weight of triethanolamine. However, this addition was certainly employed in order to neutralize the excess acid in the hydrocarbon surfactant. The salts of the triethanolamine with strong acids which were simultaneously used as surfactants, for example lauryl alcohol sulfate, do not show any anticorrosive effect; on the contrary they cause a strong corrosion on unalloyed steel.
The agents of the invention may contain known hydrocarbon surfactants in an amount of from 5 to 50 % by weight, especially from 20 to 40 % by weight. Fluorine surfactants may be present in an amount of from 0.1 to 5 % by weight. Hydrocarbon surfactants and fluorine surfactants may of course also be used at the same time.
As saturated amines there may be used acyclic aliphatic amines whose alkyl groups contain from 1 to 6 carbon atoms. The acyclic aliphatic amine may also contain hydroxyalkyl groups having from 2 to 6 carbon atoms. As amines there may also be used isocyclic saturated amines with 5 or 6 carbon atoms in the ring or saturated heterocyclic amines having 5 or 6 ring members and 1 to 2 nitrogen atoms in the ring. As heterocyclic amine, use is preferably made of morpholine. The heterocyclic saturated amines used may also be substituted in the ring by one or several alkyl groups or hydroxyalkyl groups having from 1 to 4 carbon atoms.
Generally, the amines are used as free bases. However, there may also be used the salts of the amine with a very weak acid, for example an aliphatic carboxylic acid having from l to 9 carbon atoms, especially from 5 to 9 carbon atoms.
Particularly favorable are amines with a 2-hydroxyethyl group, such as monoethanolamine, diethanolamine, but especially triethanolamine. Other amines, such as methylamine, dimethylamine, diethylamine and fatty amines having 5 or 6 carbon atoms are also suitable for the above-mentioned purpose. There may also be used alkylene diamines, such as ethylene diamine, and other acyclic, cyclic and heterocyclic diamines and polyamines.
Preference is given to monoamines. The combination of triethanolamine and morpholine has proved to be particularly favorable.
The various amines may also well be combined with benzotriazole. These foaming agents become thus passive also towards brass.
The above-mentioned amine additives show their anticorrosive effect also in foaming agents which contain a fluorine surfactant as foaming component. These so-called aqueous film-forming foaming agents have been used to an increasing extent lately on airports for fighting hydrocarbon fires. These foaming agents contain fluorine surfactants optionally in combination with hydrocarbon surfactans of an anionic and/or non-ionogenic nature.
As fluorine surfactants there are suitable for this purpose. for example, the following substances:
1. Anionic derivatives of carboxylic acids and sulfonic acids, as they have been described, for
example. in German Patent Specification No. 12 16 116.
2. Non-ionogenic fluorine surfactants. as they have been described. for example, in German
Auslegeschrift No. 21 27 232. Particularly suitable are carboxylic acid-amide-amine
derivatives of the formula RtCONH(CH2)3N(CH2CH2OH)2.
in which Rf represents a perfluorinated carbon chain having from 3 to 12. especially from 6
to 8 carbon atoms.
3. Cationic fluorine surfactants. such as
4. Fluorine surfactants having a betainic structure. such as
All of these fluorine surfactants cause a corrosive attack on unalloyed steel in amine-free fire extinguishers on the basis of foam.
The invention is illustrated by the following Examples; the formulations of Examples I to 4 had a chloride content of less than 0. 1% by weight.
EXAMPLE 1: (Comparison Example)
In a steel tank of ST 37 the following foam concentrate was stored:
C12-C16-alkyl sulfate as triethanolamine salt 25 % by wt.
technical grade; content of surfact n 40 % by wt. (may be obtained as Genapol CRT 40) lauryl alcohol 2 % by wt.
butyl alcohol 30 %bywt.
drinking water 43 % by wt.
100 % by wt.
The metal abrasion caused by corrosion was 0.46 g/m2 per day.
Example 2:
Under the conditions of Example 1, the following concentrate was stored:
Alkyl sulfate of Example 1 25 % by wt.
lauryl alcohol 2% by wt.
butyl glycol 30 % by wt.
morpholine 5% by wt.
triethanolamine 10 % by wt.
drinking water 28 % by wt.
100 % by wt.
The abrasion caused by corrosion was 0.93.10-3 g/m2 per day.
Example 3:
Under the conditions of Example 1, the following formulation was used: C,2-CI6-alkylether sulfate, ammonium salt, 40 % by wt.
30 % of active substance
lauryl alcohol 2 % by wt.
butyl glycol 25 % by wt.
drinking water 20 % by wt.
triethanolamine 13 % by wt.
100 % by wt.
Even after a prolonged storage, no corrosive attack could be observed.
Example 4:
Under the conditions of Example 1, the following formulation was used:
Alkyl sulfate of Example 1 35 % by wt.
lauryl alcohol 2 % by wt.
butyl glycol 25 % by wt.
morpholine 5 % by wt.
triethanolamine 10 % by wt.
drinking water 23 % by wt.
oxy % or wt.
No corrosion was observed.
Example 5:
While using the formulation of Example 3. a fire extinguishing test was carried out in
accordance with the technical terms of delivery of the Bundesamt für Wehrtechnik und
Beschaffung TL 4210-092 in a 4 m2 fire basin (basin height: l meter. about 400 1 of water
cushion, 200 1 of jet fuel JP 4. foam jet tube with 25 1 /mien of water flow. foaming number
about 10 times). The admixture of the foaming agent was 3 % by volume. After a preliminary
burning period of I minute an extinction time of 67 seconds was ascertained for formulation
2. The technical terms allow an extinction time of 90 seconds. 10 Minutes after the extinction,
a test for re-ignition was performed by means of a torch. Re-ignition did not take place.
Example 6:
Example 5 was repeated with the formulation of Example 4. After a preliminary burning period of 1 minute an extinction time of 62 seconds was observed.
Example 7: (Comparison Example)
The formulation of Example 1 was diluted with a synthetic sea water having the following composition:
Magnesium chloride 1.1 %bywt.
calcium chloride 0.16 % by wt.
sodium sulfate 0.4 %bywt.
sodium chloride 2.5 % by wt.
dist. water 95.84 % by wt.
Foaming tests were carried out according to the technical terms of delivery of the Bundeswehr, TL 4210-092, and the following foam stability values (water half-time values) were observed:
for heavy foam 22 minutes
for medium foam 14 minutes
for light foam 11 minutes
Example 8:
The foam test of Example 7 was repeated using a composition of the present invention (concentrate of Example 2). The following water half-time values were observed:
for heavy foam 31 minutes
for medium foam 22 minutes
for light foam 17 minutes
It follows from the comparison with Example 7 that the addition of the amines increases the foam stability. when sea water is used.
WHAT WE CLAIM IS:
I. An aqueous foaming composition which has a chloride content of less than 0.1% by weight and which contains a synthetic surfactant and from 5 to 30% by weight. calculated on the composition. of a saturated primary, secondary or tertiary amine in free form or in the form of a salt with a weak acid.
2. A composition as claimed in claim I. wherein the chloride content is less than 0.04%by weight.
3. A composition as claimed in claim 2. wherein the chloride content is less than 0.0 % by weight.
4. A composition as claimed in any one of claims l to 3. wherein the amine is an acyclic aliphatic amine in which the or each alkyl group has from I to 6 carbon atoms.
5. A composition as claimed in any one of claims I to 4. wherein the amine is an acyclic aliphatic amine which contains at least one hydroxyalkyl group having from 2 to 6 carbon atoms.
6. A composition as claimed in claim 5. wherein the or each hydroxyalkyl group is a 2-hydroxyethyl group.
7. A composition as claimed in claim 6. which contains triethanolamine.
8. A composition as claimed in any one of claims I to 3. wherein the amine is a carbocyclic amine having 5 or 6 carbon atoms in the ring.
9. A composition as claimed in any one of claims l to 3. wherein the amine is a heterocyclic amine having 5 or 6 ring members and I or 2 nitrogen atoms.
10. A composition as claimed in claim 9. which contains morpholine.
II. A composition as claimed in any one of claims I to 3. which contains triethanolamine and morpholine.
12. A composition as claimed in claim 9. wherein the heterocyclic amine is substituted in the ring by one or more alkyl and/or more hydroxyalkyl groups having from I to 4 carbon atoms.
13. A composition as claimed in any one of claims I to 12. wherein the weak acid is an aliphatic carboxylic acid having from I to 9 carbon atoms.
14. A composition as claimed in claim 13. wherein the acid has from 5 to 9 carbon atoms.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (23)
- **WARNING** start of CLMS field may overlap end of DESC **.Example 6: Example 5 was repeated with the formulation of Example 4. After a preliminary burning period of 1 minute an extinction time of 62 seconds was observed.Example 7: (Comparison Example) The formulation of Example 1 was diluted with a synthetic sea water having the following composition: Magnesium chloride 1.1 %bywt.calcium chloride 0.16 % by wt.sodium sulfate 0.4 %bywt.sodium chloride 2.5 % by wt.dist. water 95.84 % by wt.Foaming tests were carried out according to the technical terms of delivery of the Bundeswehr, TL 4210-092, and the following foam stability values (water half-time values) were observed: for heavy foam 22 minutes for medium foam 14 minutes for light foam 11 minutes Example 8: The foam test of Example 7 was repeated using a composition of the present invention (concentrate of Example 2). The following water half-time values were observed: for heavy foam 31 minutes for medium foam 22 minutes for light foam 17 minutes It follows from the comparison with Example 7 that the addition of the amines increases the foam stability. when sea water is used.WHAT WE CLAIM IS: I. An aqueous foaming composition which has a chloride content of less than 0.1% by weight and which contains a synthetic surfactant and from 5 to 30% by weight. calculated on the composition. of a saturated primary, secondary or tertiary amine in free form or in the form of a salt with a weak acid.
- 2. A composition as claimed in claim I. wherein the chloride content is less than 0.04%by weight.
- 3. A composition as claimed in claim 2. wherein the chloride content is less than 0.0 % by weight.
- 4. A composition as claimed in any one of claims l to 3. wherein the amine is an acyclic aliphatic amine in which the or each alkyl group has from I to 6 carbon atoms.
- 5. A composition as claimed in any one of claims I to 4. wherein the amine is an acyclic aliphatic amine which contains at least one hydroxyalkyl group having from 2 to 6 carbon atoms.
- 6. A composition as claimed in claim 5. wherein the or each hydroxyalkyl group is a 2-hydroxyethyl group.
- 7. A composition as claimed in claim 6. which contains triethanolamine.
- 8. A composition as claimed in any one of claims I to 3. wherein the amine is a carbocyclic amine having 5 or 6 carbon atoms in the ring.
- 9. A composition as claimed in any one of claims l to 3. wherein the amine is a heterocyclic amine having 5 or 6 ring members and I or 2 nitrogen atoms.
- 10. A composition as claimed in claim 9. which contains morpholine.
- II. A composition as claimed in any one of claims I to 3. which contains triethanolamine and morpholine.
- 12. A composition as claimed in claim 9. wherein the heterocyclic amine is substituted in the ring by one or more alkyl and/or more hydroxyalkyl groups having from I to 4 carbon atoms.
- 13. A composition as claimed in any one of claims I to 12. wherein the weak acid is an aliphatic carboxylic acid having from I to 9 carbon atoms.
- 14. A composition as claimed in claim 13. wherein the acid has from 5 to 9 carbon atoms.
- 15. A composition as claimed in any one of claims 1 to 14, which also contains benzotriazole.
- 16. A composition as claimed in any one of claims 1 to 15, which contains from 5 to 50% by weight, calculated on the composition, of one or more synthetic hydrocarbon surfactants.
- 17. A composition as claimed in claim 16, which contains from 20 to 40% by weight of the hydrocarbon surfactant(s).
- 18. A composition as claimed in any one of claims 1 to 17, which contains from 0.1 to 5 % by weight, calculated on the composition, of one or more fluorine surfactants.
- 19. A composition as claimed in any one of claims 1 to 18, which has a total chloride, bromide and iodide content of less than 0.1 % by weight.
- 20. A composition as claimed in claim 19, wherein the total chloride, bromide and iodide content is less than 0.04% by weight.
- 21. A composition as claimed in claim 1, substantially as described herein.
- 22. A composition as claimed in claim 1, substantially as described in any one of Examples 2 to 4.
- 23. A process for the preparation of a fire extinguishing foam, wherein an aqueous foaming composition as claimed in any one of claims 1 to 22 is used.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19772714902 DE2714902A1 (en) | 1977-04-02 | 1977-04-02 | IMPROVED FOAM GENERATING CONCENTRATE FOR FIRE EXTINGUISHING PURPOSES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1583020A true GB1583020A (en) | 1981-01-21 |
Family
ID=6005541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12935/78A Expired GB1583020A (en) | 1977-04-02 | 1978-04-03 | Foaming compositions |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS53126799A (en) |
| DE (1) | DE2714902A1 (en) |
| ES (1) | ES468233A1 (en) |
| FR (1) | FR2385414A1 (en) |
| GB (1) | GB1583020A (en) |
| IT (1) | IT1094002B (en) |
| SE (1) | SE7803662L (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4145296A (en) * | 1977-12-29 | 1979-03-20 | Monsanto Company | Weather-durable aqueous fire retardant stabilized against gelation |
| JPS5514058A (en) * | 1978-07-17 | 1980-01-31 | Hatsuta Seisakusho | Foaming quenching chemicals |
| CH642854A5 (en) * | 1980-03-24 | 1984-05-15 | Sulzer Ag | METHOD FOR REDUCING CORROSION DAMAGE DURING AND / OR AFTER FIRE FIGHTING IN ROOMS. |
| JPS59181173A (en) * | 1983-03-30 | 1984-10-15 | 大日本インキ化学工業株式会社 | Fire extinguishing agent |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1134615A (en) * | 1955-10-24 | 1957-04-15 | Foam fire extinguishers and extinguisher charges | |
| AT281611B (en) * | 1968-04-29 | 1970-05-25 | Minimax Ag In Urach Und Henkel | Improved foam producing concentrate for fire extinguishing purposes |
| NL6907812A (en) * | 1968-05-28 | 1969-12-02 | ||
| CA918026A (en) * | 1969-04-22 | 1973-01-02 | B. Jamison Will | Foam concentrate |
-
1977
- 1977-04-02 DE DE19772714902 patent/DE2714902A1/en not_active Withdrawn
-
1978
- 1978-03-27 ES ES468233A patent/ES468233A1/en not_active Expired
- 1978-03-31 SE SE7803662A patent/SE7803662L/en unknown
- 1978-03-31 JP JP3695478A patent/JPS53126799A/en active Pending
- 1978-03-31 IT IT21899/78A patent/IT1094002B/en active
- 1978-04-03 GB GB12935/78A patent/GB1583020A/en not_active Expired
- 1978-04-03 FR FR7809739A patent/FR2385414A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| SE7803662L (en) | 1978-10-03 |
| DE2714902A1 (en) | 1978-10-12 |
| FR2385414B1 (en) | 1982-10-29 |
| JPS53126799A (en) | 1978-11-06 |
| ES468233A1 (en) | 1978-12-01 |
| FR2385414A1 (en) | 1978-10-27 |
| IT7821899A0 (en) | 1978-03-31 |
| IT1094002B (en) | 1985-07-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |