Uninhibited bentonite composition
November 22, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3437463 Method and composition for preventing water contaminated with industrial waste seeping through soil containing said water Method of making a water barrier panel Bentonite-gelled oil waterproofing composition Waterproofing material containing bentonite Waterproofing barrier Aqueously-swelling water stopper and a process of stopping water thereby Method of forming a foundation with liquid tight joints Organophilic clay gellants Patent #: 4382868 InventorAssigneeApplicationNo. 06/443225 filed on 11/22/1982US Classes:264/281, Longitudinally advanced coiling (nonplanar)106/285, Hydrocarbon containing106/33, Leak stopping264/210.2, Including a step other than application or removal of tension264/40.7, Controlling rate of movement of molding material or its support in a continuous process405/129.65, With treatment405/263, Chemical405/267, Filling substerranean cavity (e.g., underground wall)405/270, Impermeabilization524/445, Clay, e.g., fullers earth, fire clay, etc.524/446, With water NRM524/477, At least two solid hydrocarbons524/490, Hydrocarbon having a specified name, molecular weight or chain length524/491, Hydrocarbon having a specified viscosity524/574Interpolymer with at least one aliphatic hydrocarbon monomer, e.g., butyl rubber, etc.ExaminersPrimary: Lilling, Herbert J.Attorney, Agent or FirmInternational ClassesC08K 3/00 (20060101)C08K 3/34 (20060101) E02D 31/02 (20060101) E02D 31/00 (20060101) AbstractThe present invention relates to a non-hydrated bentonite intimately contacted with a polypropene, polybutene, or mixtures thereof to provide a formable and shapable non-aqueous bentonite composition particularly useful as a water barrier. The bentonite composition can be extruded in the form of a rope, rod, sheet or the like and is sufficiently tacky for adherence to a wall or conduit, floor or roof in areas of potential water flow to prevent the seepage of water through the bentonite composition. In one embodiment, the bentonite composition includes a polypropene and a polybutene and an elastomer, such as butyl rubber, having sufficient resilience to stretch or expand with the expanding bentonite upon hydration and to aid in maintaining the structural integrity and cohesiveness of the composition. In another embodiment, the composition comprises bentonite, an elastomer, and any plasticizer compatible with the elastomer.Other References
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