| 摘要 |
A method of treating hazardous material or other substrate with an aqueous air foam, comprising the steps of (1) preparing an aqueous solution or dispersion comprising (a) water-soluble polyhydroxy polymer capable of complexation with the borate anion (b) polyvalent ionic complexing agent, (c) foaming agent (d) a pH modifier, and (e) water as the major component of said aqueous solution or dispersion by weight; (2) aerating said aqueous solution or dispersion to form therefrom a fluid, aqueous, aerated or air-entrained, low density foam (or air foam) which is gelable or becomes viscous, generally at least 5 seconds after its formation; and (3) spraying, contacting or otherwise applying said fluid, aqueous air foam to exposed surface of said hazardous material or other substrate. |
