Membrane-forming foam composition and method

B - Operations – Transporting – 05 – D

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B05D 5/00 (2006.01) B05D 7/24 (2006.01) B09B 1/00 (2006.01) C08J 9/30 (2006.01) C09K 3/18 (2006.01) E01C 11/24 (2006.01) E02D 19/16 (2006.01) E02D 31/02 (2006.01)

Patent

CA 2040440

An aqueous foamable membrane-forming composition comprised of a water dispersible polymeric latex, preferably styrene-butadiene latex, and an alkyl ether sulfate surface active agent. The composition desirably contains a alcohol having 12 to 14 carbon atoms, an acrylic acid polymer viscosity modifying agent and powdered carbon. Compositions of the invention in dilute aqueous form can be foamed and deposited on a surface to be covered, such as a landfill. Upon standing, the foam develops into a substantially stable, weather resistent membrane.

Une composition aqueuse et moussante formant une membrane est composée d'un latex polymère dispersible dans l'eau, de préférence un latex styrène-butadiene, et d'un agent tensioactif, l'alkyle éther sulfate. De préférence, la composition contient un alcool ayant de 12 à 14 atomes de carbone, un agent polymère acide acrylique modifiant la viscosité et un carbone sous forme de poudre. Des compositions de cette invention sous forme aqueuse diluée peuvent être transformées en mousse et déposées sur une surface à recouvrir, comme un remblai. Lorsqu'on la dépose, la mousse se transforme en une membrane pratiquement stable, résistant aux intempéries.

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