Rendering porous structures impermeable by treatment with gellab

Details Rendering porous structures impermeable by treatment with gellab Rendering porous structures impermeable by treatment with gellab

1977-07-20

1981-09-22

Smith, Ronald H.

Coating processes

Restoring or repairing

138 97, 166295, 405264, 405270, 427136, B32B 3500

Patent

active

042910692

ABSTRACT:
Aqueous solutions of amide polymers such as polyacrylamide when treated with small amounts of a water-soluble polyaldehyde at an alkaline pH react to form film gels within a short time at ambient temperature. Such gels 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: 3437625 (1969-04-01), Bonnel et al.
patent: 3759197 (1973-09-01), Bracke
patent: 3810468 (1974-05-01), Harper et al.
patent: 3923666 (1975-12-01), Dill
patent: 3953341 (1976-04-01), Martin
patent: 3953342 (1976-04-01), Martin

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