Superabsorbent polymers in agricultural applications
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United States of America Patent
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Sep 13, 2011
Grant Date -
Mar 12, 2009
app pub date -
Nov 4, 2008
filing date -
Aug 27, 2004
priority date (Note) -
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Abstract
Superabsorbent polymer (SAP) products for use in agricultural applications, and methods of making and using the same are disclosed. Certain of the SAPs include a monomer or a mixture of monomers, selected from acrylic acid, acrylamide, acrylonitrile, methacrylamide, 2-acryloamido-2-methyl-propanesulfonic acid, methacrylic acid, vinyl sulfonic acid, ethyl acrylate, potassium acrylate, derivatives thereof or mixtures thereof, that is graft polymerized onto a starch in the presence of an initiator to form a starch graft copolymer.
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