US4209407A
Expired / Lapsed
US
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Fire extinguishing agent
Assignee: Hoechst AG
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Filing: 1978-03-27
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Granted: 1980-06-24
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Expires: 1998-03-27
Abstract
Abstract New aqueous concentrates containing a fluorinated surfactant and a further foam producing component are disclosed. They contain of from 0.5 to 2.5% by weight a fluorinated phosphorous acid ester having the formula ##STR1## In this formula means R f a perfluoroalkyl radical with from 3 to 16 carbon atoms, m zero or 1, p an integer of from 1 to 4, R 1 a hydrogen atom, a C 1-4 alkyl radical, a cylcohexyl radical or a 2-hydroxyalkyl radical with from 2 to 6 carbon atoms, R 2 a C 1-4 alkyl radical, a cyclohexyl radical or a 2-hydroxyalkyl radical with 2 to 6 carbon atoms, or a radical of the formula R f --(CF═CH) m --(CH 2 ) p , Q an alkylene radical with 2 to 4 carbon atoms, which may be substituted by phenyl groups. The aqueous concentrate when diluted with about 16 parts by volume of water gives a solution which can be foamed. The foam it capable of extinguishing liquid hydrocarbon fires.
Inventors
- 👤 Erich Schuierer
- 👤 Heinrich Bathelt
- 👤 Richard Broll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:32
CPC Classifications
A; A62; A62D; A62D1/00; A62D1/0071; A62D1/0085; C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/141; C07F9/1411
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
162 words
Foam concentrate for fire-fighting purposes which contains water, at least one foam producing fluorinated surfactant and a further foam producing component, and which has a content of from 0.5 to 2.5% by weight of a fluorinated phosphorous acid ester of the formula in which R f is a perfluoroalkyl radical with from 3 to 16 carbon atoms, m is zero or 1, p is an integer of from 1 to 4, R 1 is a hydrogen atom, a C 1-4 alkyl radical, a cyclohexyl radical or a 2-hydroxyalkyl radical with from 2 to 6 carbon atoms, R 2 is a C 1-4 alkyl radical, a cyclohexyl radical or a 2-hydroxyalkyl radical with 2 to 6 carbon atoms, or a radical of the formula R f --(CF═CH) m --(CH 2 ) p , and Q is an alkylene radical with 2 to 4 carbon atoms which may be substituted by phenyl groups, or the radical --CH 2 --C(CH 3 ) 2 --CH 2
Claim 2
Dependent Claim
162 words
Foam concentrate for fire-fighting purposes which contains water, at least one foam producing fluorinated surfactant and a further foam producing component, and which has a content of from 0.5 to 2.5% by weight of a fluorinated phosphorous acid ester of the formula in which R f is a perfluoroalkyl radical with from 3 to 16 carbon atoms, m is zero or 1, p is an integer of from 1 to 4, R 1 is a hydrogen atom, a C 1-4 alkyl radical, a cyclohexyl radical or a 2-hydroxyalkyl radical with from 2 to 6 carbon atoms, R 2 is a C 1-4 alkyl radical, a cyclohexyl radical or a 2-hydroxyalkyl radical with 2 to 6 carbon atoms, or a radical of the formula R f --(CF═CH) m --(CH 2 ) p , and Q is an alkylene radical with 2 to 4 carbon atoms which may be substituted by phenyl groups, or the radical --CH 2 --C(CH 3 ) 2 --CH 2
Claim 3
Dependent Claim
13 words
Foam concentrate as claimed in claim 1, which has a content of said
Claim 4
Dependent Claim
10 words
Foam-type fire extinguishing concentrate as claimed in claim 1, which
Claim 5
Dependent Claim
13 words
Foam concentrate as claimed in claim 1, which contains as a further foam
Claim 6
Dependent Claim
13 words
Foam concentrate as claimed in claim 1, which contains as a further foam
Claim 7
Dependent Claim
20 words
Foam concentrate as claimed in claim 5, wherein the non-ionic fluorinated surfactant has the formula F(CF.sub.2).sub.a --CONH(CH.sub.2).sub.3 N(CH.sub.2 CH.sub.2 OH).sub.2
Claim 8
Dependent Claim
16 words
Foam concentrate as claimed in claim 5, wherein the weight ratio non-ionic fluorinated surfactant/fluorine-containing phosphorous acid
Claim 9
Dependent Claim
16 words
Foam concentrate as claimed in claim 7, wherein the weight ratio non-ionic fluorinated surfactant/fluorine-containing phosphorous acid
Claim 10
Dependent Claim
89 words
Foam concentrate as claimed in claim 1, wherein a phosphorous acid ester of the formula ##STR12## is used in which R f is a perfluoroalkyl radical with from 3 to 16 carbon atoms, R 1 is a hydrogen atom, a C 1-4 alkyl radical, a cyclohexyl radical or a 2-hydroxyalkyl radical with from 2 to 6 carbon atoms, and Q is an alkylene radical with 2 to 4 carbon atoms which may be substituted by phenyl groups, or the radical --CH 2 --C(CH 3 ) 2 --CH 2 --.
Claim 11
Dependent Claim
18 words
Foam concentrate as claimed in claim 9, wherein a phosphorous acid ester of the formula ##STR13## is used.
Claim 12
Dependent Claim
20 words
Foam concentrate as claimed in claim 1, containing from 0 up to 35% by weight of a monoalkyl ethylene glycol.
Claim 13
Dependent Claim
48 words
Process for the extinction of a burning liquid hydrocarbon by covering the area of fire with a foam consisting of a non combustible gaseous phase and an aqueous liquid phase, wherein the liquid phase contains of from 0.01 to 1% by weight of an ester of claim 1.
Claim 14
Dependent Claim
23 words
Process as claimed in claim 12, wherein the content of said ester is in the range of from 0.03 to 0.3% by weight.
Claim 15
Dependent Claim
178 words
Foam concentrate for fire-fighting purposes, containing water, at least one foam producing fluorinated surfactant and a further foam producing component which comprises an ionic fluorine-containing compound of the formula ##STR14## in which R f is a perfluoroalkyl radical with from 3 to 16 carbon atoms, m is zero or 1, p is an integer of from 1 to 4, R 1 is a hydrogen atom, a C 1-4 alkyl radical, a cyclohexyl radical or a 2-hydroxyalkyl radical with from 2 to 6 carbom atoms, R 2 is a C 1-4 aklyl radical, a cyclohexyl radical or a 2-hydroxyalkyl radical with 2 to 6 carbon atoms, or a radical of the formula R f --(CF═CH) m --(CH 2 ) p , Q is an alkylene radical with 2 to 4 carbon atoms which may be substituted by phenyl groups, or the radical --CH 2 --C(CH 3 ) 2 --CH 2 --, and A⊖ is a water-solubilizing anion, and non-ionic fluorinated compound of the formula F(CF.sub.2).sub.a.CONH(CH.sub.2).sub.3 N(CH.sub.2 CH.sub.2 OH).sub.2 in which a is an integer of from 6 to 10.
Claim 16
Dependent Claim
178 words
Foam concentrate for fire-fighting purposes, containing water, at least one foam producing fluorinated surfactant and a further foam producing component which comprises an ionic fluorine-containing compound of the formula ##STR14## in which R f is a perfluoroalkyl radical with from 3 to 16 carbon atoms, m is zero or 1, p is an integer of from 1 to 4, R 1 is a hydrogen atom, a C 1-4 alkyl radical, a cyclohexyl radical or a 2-hydroxyalkyl radical with from 2 to 6 carbom atoms, R 2 is a C 1-4 aklyl radical, a cyclohexyl radical or a 2-hydroxyalkyl radical with 2 to 6 carbon atoms, or a radical of the formula R f --(CF═CH) m --(CH 2 ) p , Q is an alkylene radical with 2 to 4 carbon atoms which may be substituted by phenyl groups, or the radical --CH 2 --C(CH 3 ) 2 --CH 2 --, and A⊖ is a water-solubilizing anion, and non-ionic fluorinated compound of the formula F(CF.sub.2).sub.a.CONH(CH.sub.2).sub.3 N(CH.sub.2 CH.sub.2 OH).sub.2 in which a is an integer of from 6 to 10.
Claim 17
Dependent Claim
44 words
Concentrate as claimed in claim 14, wherein the weight ratio of non-ionic fluorinated compound to ionic fluorine-containing compound is smaller than 1 or equal to 1 and the absolute quantity of fluorinated surfactant is in the range of from 0.5 to 2.5% by weight.
References Cited (Backward Citations)
US3856535A
Cited
US4099574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-24 | 1983-12-24 | 1984-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-24 | 1987-12-24 | 1988-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-24 | 1991-12-24 | 1992-06-24 | $7700.00 | Window Closed / Lapsed |