Patent application number | Description | Published |
20090130368 | Self Healing Salt Water Barrier - Geocomposite articles that can provide a barrier against high conductivity water e.g., ocean water, are described and their method of manufacture, for waterproofing surfaces that contact high conductivity water. The geocomposite article mat includes a woven or non-woven geotextile sheet or mat containing a powdered or granular partially cross-linked acrylamide/acrylate/acrylic acid copolymer across its entire major surface(s). The powdered or granular copolymer has an unexpectedly high free-swell when hydrated with High Conductivity water, such as ocean water. A liquid-impermeable cover sheet is adhered to the upper major surfaces of the filled copolymer-carrying geotextile to provide a primary high conductivity water barrier layer that, if ruptured, is sealed by the swell of an underlying layer of water-insoluble, partially cross-linked acrylamide/acrylic acid copolymer. | 05-21-2009 |
20110045726 | SALT WATER SWELLABLE COMPOSITIONS AND ARTICLES - The compositions, articles and methods described herein remain intact for sealing between and around structures that contact salt water. The compositions include: (i) a partially cross-linked polyacrylamide/partially neutralized polyacrylic acid copolymer; (ii) a smectite clay; (iii) an elastomer, e.g., butyl rubber; (iv) a polyolefin polymer or copolymer; and (v) a cationic flocculant, the compositions have exceptional and unexpected free swell and cohesiveness when in contact with high conductivity water or multivalent ion-containing-contaminated water. The articles of manufacture described herein all include a combination of (i) a partially cross-linked acrylamide/acrylate/acrylic acid copolymer; (ii) a smectite clay; (iii) an elastomer, e.g., butyl rubber; (iv) polyisobutene or polyisopropene; and (v) a cationic flocculent, and are used for waterproofing against high conductivity salt-containing water preferably when used in putty-like or paste-like consistency to fill areas between and around structures, e.g., to surround a pipe inserted in a concrete wall, or to seal between two concrete sections. | 02-24-2011 |
20110177736 | Self Healing Salt Water Barrier - Geocomposite articles that can provide a barrier against high conductivity water e.g., ocean water, are described and their method of manufacture, for waterproofing surfaces that contact high conductivity water. The geocomposite article mat includes a woven or non-woven geotextile sheet or mat containing a powdered or granular partially cross-linked acrylamide/acrylate/acrylic acid copolymer across its entire major surface(s). The powdered or granular copolymer has an unexpectedly high free-swell when hydrated with High Conductivity water, such as ocean water. A liquid-impermeable cover sheet is adhered to the upper major surfaces of the filled copolymer-carrying geotextile to provide a primary high conductivity water barrier layer that, if ruptured, is sealed by the swell of an underlying layer of water-insoluble, partially cross-linked acrylamide/acrylic acid copolymer. | 07-21-2011 |
20140302735 | SELF HEALING SALT WATER BARRIER - Geocomposite articles that can provide a barrier against high conductivity water e.g., ocean water, are described and their method of manufacture, for waterproofing surfaces that contact high conductivity water. The geocomposite article mat includes a woven or non-woven geotextile sheet or mat containing a powdered or granular partially cross-linked acrylamide/acrylate/acrylic acid copolymer across its entire major surface(s). The powdered or granular copolymer has an unexpectedly high free-swell when hydrated with High Conductivity water, such as ocean water. A liquid-impermeable cover sheet is adhered to the upper major surfaces of the filled copolymer-carrying geotextile to provide a primary high conductivity water barrier layer that, if ruptured, is sealed by the swell of an underlying layer of water-insoluble, partially cross-linked acrylamide/acrylic acid copolymer. | 10-09-2014 |