| 摘要 |
The invention is a composition for combating fires and for inhibiting release of flammable vapor from liquids, which is film-forming and comprises, in an aqueous medium, a blend of a hydrolyzed protein and an ampholytic sulphonamide fluorosurfactant falling within the general formula: C6F13.(CH2)2.SO2.N(H or CH3).(CH2)2 or 3.N30(CH3)2.(CH2)1-3.COO-, said fluorosurfactant, when as a 0.1% aqueous solution, being film-forming on cyclohexane at normal temperatures. The composition preferably has an interfacial tension on 4-star petrol of at least 3.5 dyn.cm-1 and is particularly suitable for employment in foam form.
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