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US 8,524,104 B1Granted
Fluoroalkenyl sulfate surfactants
AssigneeThe Ansul Company
InventorJeffrey D. Michael
Life of this patent
Estimating the term…
Abstract
Fire extinguishing compositions and methods of extinguishing a fire comprising compounds of formula (I) where Rf is a fluorocarbon group. The compounds and compositions described herein are useful as intermediates in the preparation of or as additives to AFFF (aqueous film forming foam) formulations used for the extinguishment of fuel and solvent fires.
Claims16
A fire extinguishing composition comprising:
- at least one solvent;
- and
- a first fluorosurfactant of formula (I)
- where
- L is absent, C1-C10 alkylene-O—, (—CH2CH2O—)n, (—CH2CH(CH3)O—)n, or (—CH2CH(OH)CH2O—)n;
- n is an integer from 1 to 10;
- Rf is a C4-C10 alkyl group substituted with 2m or (2m+1) fluoro atoms where m is the number of carbons in the alkyl backbone;
- M is an alkali metal cation, an alkaline earth metal cation, ammonium cation, a C1-C4 mono-substituted ammonium cation, a C1-C4 di-substituted ammonium cation, a C1-C4 tri-substituted ammonium cation, or a C1-C4 tetra-substituted ammonium cation;
- and
- x is an integer selected from 1 or 2, and corresponds to the valency of M.
7 more elements
A method of extinguishing a fire comprising:
- applying to said fire a composition comprising:
- at least one solvent;
- and
- a compound of formula I
- where
- L is absent, C1-C10 alkylene-O—, (—CH2CH2O—)n, (—CH2CH(CH3)O—)n, or (—CH2CH(OH)CH2O—)n;
- n is an integer from 1 to 10;
- Rf is a C4-C10 alkyl group substituted with 2m or (2m+1) fluoro atoms where m is the number of carbons in the alkyl backbone;
- M is an alkali metal cation, an alkaline earth metal cation, ammonium cation, a C1-C4 mono-substituted ammonium cation, a C1-C4 di-substituted ammonium cation, a C1-C4 tri-substituted ammonium cation, or a C1-C4 tetra-substituted ammonium cation;
- and
- x is an integer selected from 1 or 2, and corresponds to the valency of M.
8 more elements
A compound of formula (I):
- where
- L is absent, C1-C10 alkylene-O—, (—CH2CH2O—)n, (—CH2CH(CH3)O—)n, or (—CH2CH(OH)CH2O—)n;
- n is an integer from 1 to 10;
- Rf is a C4-C10 alkyl group substituted with 2m or (2m+1) fluoro atoms where m is the number of carbons in the alkyl backbone;
- M is an alkali metal cation, an alkaline earth metal cation, ammonium cation, a C1-C4 mono-substituted ammonium cation, a C1-C4 di-substituted ammonium cation, a C1-C4 tri-substituted ammonium cation, or a C1-C4 tetra-substituted ammonium cation;
- and
- x is an integer selected from 1 or 2, and corresponds to the valency of M.
4 more elements
Dependencies are inferred from the claim text.