US4099574A
Expired / Lapsed
US
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Fire-fighting compositions
Assignee: Chubb Fire Ltd
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Filing: 1977-04-04
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Granted: 1978-07-11
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Expires: 1997-04-04
Abstract
Abstract Concentrates suitable for making fire-fighting liquids upon sixteen-fold dilution are described comprising particular perfluoro ampholytic surfactants, solvents and fluorine-free surfactants. The ampholytic surfactants are of the general formula ##STR1## wherein n represents an integer of from 1 to 20, a represents an integer of from 2 to 10, q represents an integer of from 0 to 10, p represents an integer from 0 to 10 and each of R 1 , R 2 and R 3 , which may be the same or different, are hydrogen, C 1-6 alkyl or C.sub.n F.sub.2n+1 --(CH.sub.2).sub.a --SO.sub.2 the solvent is a glycol or glycol ether preferably butyldigol or butyl cellosolve. When the preferred fluorine-free surfactants are used the solutions obtainable on dilution will form a film on n-hexane. The concentrates contain less than 2% of the perfluoro surfactant.
Inventors
- 👤 Gerald Edward Cooper
- 👤 Robert Eugene Stratton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:50
CPC Classifications
A; A62; A62D; A62D1/00; A62D1/0071; A62D1/0085
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
128 words
A fire fighting concentrate comprising an aqueous solution of (a) less than 2% by weight of perfluoro surfactant, (b) from 1 to 9 parts by weight, per part by weight perfluoro surfactant, of a fluorine-free surfactant, and (c) glycol or glycol ether solvent for the perfluoro surfactant, and in which the perfluoro surfactant comprises an ampholytic fluorinated sulphonamide having the general formula ##STR3## wherein n represents an integer of from 1 to 20, a represents an integer of from 2 to 10, q represents an integer of from 0 to 10, p represents an integer from 0 to 10 and each of R 1 , R 2 and R 3 , which they be the same or different, are hydrogen, C 1-6 alkyl or C.sub.n F.sub.2n+1 --(CH.sub.2).sub.a --SO.sub.2
Claim 2
Dependent Claim
128 words
A fire fighting concentrate comprising an aqueous solution of (a) less than 2% by weight of perfluoro surfactant, (b) from 1 to 9 parts by weight, per part by weight perfluoro surfactant, of a fluorine-free surfactant, and (c) glycol or glycol ether solvent for the perfluoro surfactant, and in which the perfluoro surfactant comprises an ampholytic fluorinated sulphonamide having the general formula ##STR3## wherein n represents an integer of from 1 to 20, a represents an integer of from 2 to 10, q represents an integer of from 0 to 10, p represents an integer from 0 to 10 and each of R 1 , R 2 and R 3 , which they be the same or different, are hydrogen, C 1-6 alkyl or C.sub.n F.sub.2n+1 --(CH.sub.2).sub.a --SO.sub.2
Claim 3
Dependent Claim
34 words
A concentrate according to claim 1 containing from 1 to 1.5% perfluoro surfactant, about 2 to 4 parts, per part perfluoro surfactant, of the fluorine-free surfactant, and about 20 to 30% of the solvent.
Claim 4
Dependent Claim
25 words
A concentrate according to claim 1 in which the solvent is selected from butyl digol and C 4 H 9 --OC 2 H 4 --OH.
Claim 5
Dependent Claim
13 words
A concentrate according to claim 1 in which the fluorine-free surfactant is nonionic.
Claim 6
Dependent Claim
20 words
A concentrate according to claim 1 in which the surfactant is an alkylphenyl ethoxylate containing at least 8 ethoxy groups.
Claim 7
Dependent Claim
19 words
A concentrate according to claim 5 in which the nonionic surfactant is an octylphenol ethoxylate containing 10 ethoxy groups.
Claim 8
Dependent Claim
26 words
A concentrate according to claim 1 in which the amount of the fluorine-free surfactant is from 1 to 4 parts per part by weight perfluoro surfactant.
Claim 9
Dependent Claim
14 words
A concentrate according to claim 1 having a pH of from 7.5 to 8.5.
Claim 10
Dependent Claim
21 words
A concentrate according to claim 1 in which the amount of glycol or glycol ether solvent is from 15 to 25%.
Claim 11
Dependent Claim
19 words
A concentrate according to claim 1 in which up to 30% of the fluorine-free surfactant is a fatty alkanolamide
Claim 12
Dependent Claim
21 words
A concentrate according to claim 10 containing 5 to 10% based on the fluorine-free surfactant of coconut, lauric or oleic diethanolamide.
Claim 13
Dependent Claim
31 words
A concentrate according to claim 1 in which the fluorine-free surfactant is selected from alkoxylates of aliphatic alcohols containing at least 12 carbon atoms, alkoxylates of alkyl phenols, and phosphate esters.
Claim 14
Dependent Claim
46 words
A concentrate according to claim 12 in which the fluorine-free surfactant is selected from octylphenyl condensates with 8 to 40 moles ethylene oxide, nonylphenyl condensates with 8 to 15 moles ethylene oxide, tridecanol condensates with 7 to 10 moles ethylene oxide and phosphate ester foaming surfactants.
Claim 15
Dependent Claim
21 words
A concentrate according to claim 13 in which the fluorine-free surfactant is a condensate of 10 moles ethylene oxide with octylphenol.
Claim 16
Dependent Claim
68 words
A concentrate according to claim 1 containing from 1 to 1.5% by weight of perfluoro surfactant, from 1 to 4 parts by weight, per part perfluoro surfactant, of an octylphenol or nonylphenol ethoxylate containing at least 10 to 11 ethoxy groups, from 15 to 25% by weight of butyl digol, and from 1 to 30%, based on the weight of fluorine-free surfactant, of coconut, lauric or oleic diethanolamide.
Claim 17
Dependent Claim
52 words
A concentrate according to claim 1 in which R 1 is selected from hydrogen C 1-6 alkyl and C n F 2n (CH 2 ) a SO 2 --, and R 2 and R 3 are selected from C 1-3 alkyl, at least one of R 2 and R 3 being methyl.
Claim 18
Dependent Claim
53 words
A concentrate according to claim 1 in which n is 4 to 10, a is 2 to 4, p is 1 to 6, q is 1 to 10 and R 1 is selected from hydrogen, and C 1-4 alkyl groups and R 2 and R 3 are selected from C 1-4 alkyl groups.
Claim 19
Dependent Claim
44 words
A concentrate according to claim 17 in which n is 6, 8 or 10, a is 2 or 4, p is 2 or 3, q is 2,3 or 4, R 1 is hydrogen or methyl and R 2 and R 3 are both methyl.
Claim 20
Dependent Claim
14 words
A concentrate according to claim 18 in which R 1 is hydrogen or methyl.
Claim 21
Dependent Claim
12 words
A concentrate according to claim 19 in which R 1 is hydrogen.
Claim 22
Dependent Claim
27 words
A concentrate according to claim 1 in which n is 6, a, p and q are each 2 and R 2 and R 3 are each methyl.
Claim 23
Dependent Claim
30 words
A concentrate according to claim 1 in which n is 6, a and p are both 2 and q is 3 and R 2 and R 3 are both methyl.
Claim 24
Dependent Claim
27 words
A concentrate according to claim 1 in which the perfluorosurfactant is a mixture of at least 70% of a compound of formula I with another perfluoro compound.
Claim 25
Dependent Claim
20 words
A fire-fighting solution made by mixing one part of a concentrate according to claim 1 with about 16 parts water.
Claim 26
Dependent Claim
131 words
A fire-fighting solution comprising (a) less than 0.13% by weight of perfluoro surfactant, from 1 to 9 parts by weight, per part perfluoro surfactant, of fluorine-free surfactant, and (c) a glycol or glycol ether solvent for the perfluoro surfactant, in which the perfluoro surfactant comprises an amphoteric fluorinated sulphonamide of the general formula r1 ? ##STR4## wherein n represents an integer of from 1 to 20, a represents an integer of from 2 to 10, q represents an integer of from 2 to 10, p represents an integer from 0 to 10 and each of R 1 , R 2 and R 3 , which may be the same or different, are hydrogen, C 1-6 alkyl or C.sub.n F.sub.2n+1 --(CH.sub.2).sub.a --SO.sub.2 and the solution has a positive spreading coefficient or n-hexane.
Claim 27
Dependent Claim
131 words
A fire-fighting solution comprising (a) less than 0.13% by weight of perfluoro surfactant, from 1 to 9 parts by weight, per part perfluoro surfactant, of fluorine-free surfactant, and (c) a glycol or glycol ether solvent for the perfluoro surfactant, in which the perfluoro surfactant comprises an amphoteric fluorinated sulphonamide of the general formula r1 ? ##STR4## wherein n represents an integer of from 1 to 20, a represents an integer of from 2 to 10, q represents an integer of from 2 to 10, p represents an integer from 0 to 10 and each of R 1 , R 2 and R 3 , which may be the same or different, are hydrogen, C 1-6 alkyl or C.sub.n F.sub.2n+1 --(CH.sub.2).sub.a --SO.sub.2 and the solution has a positive spreading coefficient or n-hexane.
Claim 28
Dependent Claim
19 words
A method of fighting a hydrocarbon fire comprising applying to the hydrocarbon a fire-fighting liquid according to claim 24.
Claim 29
Dependent Claim
19 words
A method of fighting a hydrocarbon fire comprising applying to the hydrocarbon a fire-fighting liquid according to claim 25.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |