Process for the production of a superabsorbent polymer

The present invention relates to superabsorbent polymer comprising the comprising the free radical polymerization product of an aqueous monomer mixture containing at least one α, -ethylenically unsaturated monomer; at least one monomer having at least two α, -ethylenically unsaturated groups; a cros...

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Bibliographische Detailangaben
Hauptverfasser: AUERNIG SABINE, HAGER MARC, KOHLER HANS-PETER, HARREN JORG, PLOCHINGER HARALD, GARTNER HERBERT, FRICKER DANIEL
Format: Patent
Sprache:eng
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Zusammenfassung:The present invention relates to superabsorbent polymer comprising the comprising the free radical polymerization product of an aqueous monomer mixture containing at least one α, -ethylenically unsaturated monomer; at least one monomer having at least two α, -ethylenically unsaturated groups; a crosslinking agent having at least two polymerizable double bonds; iron ions in an amount of from about 0.1 to about 3 wppm based on the total weight of the aqueous monomer mixture; and at least one chelating agent in an amount to provide a molar ratio of chelating agent to iron ion of from about 0.8 to about 4.0.