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US 4,090,967 AGranted
Aqueous wetting and film forming compositions
AssigneeCiba-Geigy Corporation
InventorRobert A. Falk
Life of this patent
Estimating the term…
Abstract
The disclosure relates to aqueous compositions which comprise water soluble fluorinated surfactant, fluorinated synergist, ionic non-fluorochemical surfactant, nonionic non-fluorochemical surfactant, electrolyte, and solvent. This composition is a concentrate which when diluted with water spreads on fuel surfaces suppressing vaporization. Because of this property the aqueous solutions of the above compositions are effective as agents for fire fighting.
Claims10
An aqueous film forming concentrate composition for extinguishing or preventing fires by suppressing the vaporization of flammable liquids, said composition comprising
- A. 0.5 to 25% by weight of a fluorinated surfactant of the formula ##STR7## where R.sub.f is straight or branched chain perfluoroalkyl of 1 to 18 carbon atoms or perfluoroalkyl substituted by perfluoroalkoxy of 2 to 6 carbon atom;
- R.sub.1 is hydrogen or lower alkyl;
- each of R.sub.2, R.sub.4, and R.sub.5, is individually hydrogen or alkyl group of 1-12 carbons;
- R.sub.3 is hydrogen, alkyl of 1 to 12 carbons, phenyl tolyl, and pyridyl;
- R.sub.6 is branched or straight chain alkylene of 1 to 12 carbon atoms, alkylenethioalkylene of 2 to 12 carbon atoms, alkyleneoxyalkylene of 2 to 12 carbon atoms or alkyleneiminoalkylene of 2 to 12 carbon atoms where the nitrogen atom is secondary or tertiary;
- M is hydrogen, a monovalent alkali metal, an alkaline earth metal, an organic base or ammonium;
- and n is an integer corresponding to the valency of M;
- B. 0.1 to 5% by weight of a fluorinated synergist of the formula
- R.sub.f -- T.sub.m --Z
- where R.sub.f is as defined above;
- R is R.sub.6 or --R.sub.6 SCH.sub.2 CHR.sub.1 --, m is an integer 0 or 1, Z is one or more covalently bonded groups selected from -- CONR.sub.1 R.sub.2, --CN, --CONR.sub.1 COR.sub.2, SO.sub.2 NR.sub.1 R.sub.2, --SO.sub.2 NR.sub.1 R.sub.7 (OH).sub.n, --R.sub.7 (OH).sub.m, --R.sub.7 (O.sub.2 CR.sub.1).sub.n, --CO.sub.2 R.sub.1, --C(.dbd.NH)NR.sub.1 R.sub.2 where R.sub.1, R.sub.2 and R.sub.6 are as defined above and R.sub.7 is a branched or straight chain alkylene of 1 to 12 carbon atoms, containing one or more polar groups;
- C. 0.1 to 25% by weight of an ionic non-fluorochemical surfactant selected from
- 1. an anionic surfactant of the formula
- (R.sub.6 --SCH.sub.2 CHR.sub.1 CONHCR.sub.2 R.sub.3 CR.sub.4 R.sub.5 SO.sub.3).sub.m M
- 2. the amphoteric surfactant selected from
- a. organic compounds containing amino and carboxy groups, and
- b. organic compounds containing amino and sulfo groups;
- D. 0.1 to 40% by weight of nonionic nonfluorochemical surfactant, selected from polyoxyethylene derivatives of alkyl-phenols, linear or branched alcohols, fatty acids, mercaptans, alkylamines, alkylamides, acetylenic glycols, phosphorus compounds, glucosides, fats and oils, amine oxides, phosphine oxides those derived from block polymers containing polyoxyethylene or polyoxypropylene units,
- E. 0 to 70% by weight of a solvent selected from an alcohol or an ether,
- F. 0 to 5% by weight of an electrolyte which is a salt of an alkaline earth metal.
17 more elements
Dependencies are inferred from the claim text.