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Structured copolymers and their use as absorbents, gels and carriers of metal ions

United States Patent

5,560,929
October 1, 1996
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
Dense star polymers or dendrimers having a highly branched interior structure capable of associating or chelating with metal ions are modified by capping with a hydrophobic group capable of providing a hydrophobic outer shell. The modified dendrimers are useful for dispersing metal ions in a non-aqueous polymer matrix. Also dense star polymers or dendrimers having a highly branched hydrophilic interior structure are modified by capping with a hydrophobic group capable of providing a hydrophobic outer shell, which modified polymers are useful as gels and surfactants.
Hedstrand; David M. (Midland, MI), Helmer; Bradley J. (Midland, MI), Tomalia; Donald A. (Midland, MI)
The Dow Chemical Company (Midland, MI)
08/ 152,335
November 12, 1993
STATEMENT OF FEDERALLY SPONSORED RESEARCH This invention was made with U.S. Government support under subcontract, number 9751405, between The University of California and The Dow Chemical Company. The University of California held the primary contract, number W-7405-ENG-48, which was awarded to The University of California by the Department of Energy. The U.S. Government has certain rights in this invention with regard to dense star polymers which have metal ions present and matrix polymers which have metal ions present. Other aspects of this present invention are not subject to U.S. Governmental rights.