Uninhibited bentonite composition

Patent 4534926 Issued on August 13, 1985. Estimated Expiration Date:

April 27, 2004. 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.

Abstract Claims Description Full Text

Patent References

3243328

3454695

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Inventor

Harriett, Todd D.

Assignee

American Colloid Company

Application

No. 06/604990 filed on 04/27/1984

US 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.

Examiners

Primary: Lilling, Herbert J.

Attorney, Agent or Firm

Mason, Kolehmainen, Rathburn & Wyss

International Classes

C09K 3/10 (20060101)
C09J 123/02 (20060101)
C09J 123/00 (20060101)
C09D 5/34 (20060101)
C08K 3/00 (20060101)
C08K 3/34 (20060101)
E02D 31/02 (20060101)
E02D 31/00 (20060101)

Abstract

The present invention relates to a nonhydrated 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.