PROCESS FOR PRODUCING SUPERABSORBENT PARTICLES
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United States of America Patent
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Issued Date -
Mar 28, 2024
app pub date -
Dec 7, 2021
filing date -
Dec 16, 2020
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Abstract
A process for producing thermally surface postcrosslinked superabsorbent particles, comprising polymerization of a monomer solution or suspension, static drying of the resultant aqueous polymer gel, comminution of the dried polymer gel, classification of the resultant polymer particles, with removal of excessively small polymer particles as undersize, mixing of the removed undersize with an aqueous solution, said aqueous solution comprising a crosslinker, and recycling of the polymer gel obtained from the undersize into the static drying.
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