METHOD OF LOCALIZATION OF SPILLAGE OF TOXIC FLUIDS Russian patent published in 2004 - IPC

FIELD: ecology, environmental control, technology of elimination of accidental spillage of liquid chemically-dangerous substances. SUBSTANCE: method of localization of spillage of toxic fluids includes application of solid substance displaying positive buoyancy on to surface f fluid. Solidifying foam of polymer composition based on carbamide-formaldehyde resin with positive buoyancy is utilized as solid substance. It includes, per cent by mass: carbamide-formaldehyde resin 30.0-60.0; acidic solidification catalyst 2.0-6.0; surface-active substance 2.0-6.0; plasticizing additive 0.2-5.0; high-molecular additive 0.5-10.0; water being the balance. Composition is foamed with compressed air and is applied in liquid state in reciprocating parallel strips imposed one on another in horizontal plane to 5-50% of area of their projection on to surface of fluid. EFFECT: increased screening efficiency due to diminished evaporation of toxic substances thanks to formation of flawless screening layer. 1 tbl