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US6610781: Reinforced networked polymer/clay alloy composite


Filing Information

Inventor(s) Zhihong Zhou · John Donald Payzant · Walter Van Woudenberg ·
Assignee(s) Alberta Research Council Inc. · Nilex, Inc. ·
Attorney/Agent(s) Kurt D. Van Tassel · Deborah G. VandenHoff · Van Tassel & Associates ·
Primary Examiner Helen L. Pezzuto ·
Application Number US9579701
Filing date 05/26/2000
Issue date 08/26/2003
Predicted expiration date 07/16/2019
U.S. Classifications 524/789  · 524/790  · 524/447  · 442/63  · 524/445  ·
International Classifications --
Kind CodeB1
International Classifications 524445 · 524447 · 524789 · 524790 · 442 63 ·
Related U.S. Application DataThis application is a continuation-in-part of U.S. patent application Ser. No. 09/356,278, filed in the name of Zhou et al on Jul. 16, 1999, now abandoned.
Foreign Priority CA2272828 - 05/26/1999 ·
57 Claims, 13 Drawings


A reinforced networked polymer/clay alloy composite is produced by contacting a monomer/clay mixture with a reinforcing agent. The monomer/clay mixture comprises a monomer, a cross-linking agent and clay particles. An initiator means is used to initiate polymerization of the monomer/clay mixture, while the cross-linking agent concurrently acts to network oligomeric and polymeric species formed during polymerization to produce a networked polymer/clay alloy in the presence of the reinforcing agent. The networked polymer/clay alloy is intimately integrated with the reinforcing agent such that, on exposure to water, the networked polymer/clay alloy swells with substantially no clay separating from the composite.

Independent Claims | See all claims (57)

  1. 1. A process for producing a reinforced networked polymer/clay alloy composite, comprising the steps of: (a) preparing a monomer/clay mixture by mixing at least a monomer, clay particles, a cross-linking agent, and a mixing fluid in a vessel; (b) contacting the monomer/clay mixture and a reinforcing agent; (c) exposing the monomer/clay mixture to a polymerization initiator means; and (d) polymerizing the monomer/clay mixture in the presence of the reinforcing agent so that a reinforced networked polymer/clay alloy composite is formed.
  2. 22. A product produced by the process according to any one of the preceding claims.

References Cited

U.S. Patent Documents

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Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
CN85102156Jan 1987
EP0693508KOHJIN CO. Ltd.Jan 1996
JP62243606KAO CORPOct 1987
JP6328639*Feb 1988
JP63028639Feb 1988
WO199405863Mar 1994
WO199914288Mar 1999
* cited by examiner

Other Publications

Blumstein, A. “Polymerization of Adsorbed Monolayers I. Preparation of the Clay-Polymer Complex”
Blumstein, R. et al. “Polymerization of Monomolecular Layers adsorbed on Montmorillonite: Cyclization in Polyacrylonitrile and Polymethacrylonitrile”
Daniel, David E. “Geosynthetic Clay Liners, Part Two: Hydraulic Properties”
Kato, C. et al. “Preparation and Electrical Properties of Quaternary Ammonium Montmorillonite-Polystyrene Complexes”
Koerner, Robert M.
Nagae, H. et al. “Adsorption and Polymerisation of Acrylamide in Na-Montmorillonite and Na-Fluor-Tetrasilicic Mica”
Ogawa, M. et al. “Preparation of Montmorillonite-Polyacrylamide Interaction Compounds and the Water Absorbing Property”
Pramanik, P. “Nano Composites of Clay and Polymer”
Srikhirin, T. et al. “Polydiacetylene-Inorganic Clay Nanocomposites”
Well, Larry W. “Building a Better Barrier”

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