Rendering porous structures impermeable by treatment with pH ins

Details Rendering porous structures impermeable by treatment with pH ins Rendering porous structures impermeable by treatment with pH ins

1978-06-02

1980-04-22

Pertilla, Theodore E.

Coating processes

With post-treatment of coating or coating material

Heating or drying

138 89, 166285, 260 294UA, 4273936, 525509, 525327, 525336, 525367, 525385, B05D 724, C08L 6120

Patent

active

041996259

ABSTRACT:
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 formations, for grouting of leaking soil pipes or wells, and to otherwise render porous structures impermeable to the passage of liquids such as water.

REFERENCES:
patent: 2856380 (1958-10-01), Roth
patent: 2940729 (1960-06-01), Rakowitz
patent: 3244640 (1966-04-01), Stadf et al.
patent: 3437625 (1969-04-01), Bonnel et al.
patent: 3520925 (1970-07-01), Heinz et al.
patent: 3556221 (1971-01-01), Haws et al.
patent: 3759197 (1973-09-01), Bracke
patent: 3759857 (1973-09-01), Bracke
patent: 3810468 (1974-05-01), Harper et al.
patent: 3953342 (1976-04-01), Martin et al.

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