| 摘要 |
<p>FIRE-FIGHTING COMPOSITIONS The invention is a composition for combating fires and for inhibiting release of flammable vapour from liquids, which is film-forming and comprises, in an aqueous medium, a blend of a hydrolysed protein and an ampholytic sulphonamide fluorosurfactant falling within the general formula:C6F13.(CH2)2.SO2.N(H or CH3).(CH2)2 or 3.?(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 clyn.cm-1 and is particularly suitable for employment in foam form.</p> |
