abstract |
Novel formulations for aqueous foams, which, in the presence of hydrocarbons, can persist for 24 hours or more. The formulations comprise one or more nonionic surfactants, a fluorinated surfactant, a solvent (esp. alcohol(s)), a polymer (esp. polysaccharides, biopolymers or synthetic polymers) and water. The foams are suitable for the suppression of hydrocarbon and polar organic vapors, and are especially useful in tanker loading. |