Rendering porous structures impermeable by treatment with ph...

Details Rendering porous structures impermeable by treatment with ph... Rendering porous structures impermeable by treatment with ph...

C - Chemistry, Metallurgy

09

K

117/193, 31/23,

C09K 17/00 (2006.01) C09K 8/512 (2006.01) C09K 17/48 (2006.01) E02D 3/12 (2006.01) E21B 33/138 (2006.01)

Patent

CA 1148287

ABSTRACT OF THE DISCLOSURE Aqueous solutions of amide polymers, such as polyacrylamide when treated with small amounts of a water-soluble polyaldehyde and a hypohalite salt at an alkaline pH, react to form firm gels within a short time at ambient temperature. Such gels, which are stable under alkaline as well as acidic conditions, are usefully employed to plug porous subterranean forma- tions, for grouting of leaking soil pipes or wells, and to otherwise render porous structures impermeable to the passage of liquids such as water.

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