Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1991-03-26
1992-06-23
Acquah, Samuel A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 65, 521 68, 521 69, 521 70, 521 841, 521 85, 521135, 521907, 521913, 521921, 252 3, 2523153, 252626, 252628, 252631, 210751, C08J 906
Patent
active
051243636
ABSTRACT:
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 having a plurality of hydrogen-bondable 1,2- and/or 1,3-diol structures capable of complexation with the borate anion, B(OH).sub.4.sup.-, (b) polyvalent ionic complexing agent, such as borax, which crosslinks said polymer by hydrogen-bonding complexation, (c) foaming agent to impart persistence to the fluid air foam generated upon aeration of said solution or dispersion, (d) a pH modifier, such as sodium hydroxide or acetic acid, to impart an appropriate pH to the solution or dispersion necessary for time-controlled formation of gelled or viscous air foam from the fluid air foam, and (e) water as the major component of said aqueous solution or dispersion by weight; (2) aerating said aqueous solution 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.
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Acquah Samuel A.
Griswold Gary L.
Kirn Walter N.
Maki Eloise J.
Minnesota Mining and Manufacturing Company
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