Superabsorbent polymers having improved processability
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United States of America Patent
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Nov 27, 2001
Grant Date -
N/A
app pub date -
Jan 10, 2000
filing date -
Apr 29, 1997
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Abstract
A composition comprising aqueous fluid absorbent polymer particles which have been heat-treated at temperatures greater than 170.degree. C. for more than 10 minutes, wherein the composition has been remoisturized, after the heat-treatment, with an aqueous additive solution, in the absence of an organic solvent or water-insoluble, non-swellable powder, and comprises 1 to 10 percent by weight, based on the total weight of the composition, water and wherein the composition is characterized by the ability to absorb at least 20 grams of a 0.9 weight percent aqueous saline solution under a pressure of 0.3 psi (21,000 dynes/cm.sup.2), that is, a 60 minute 0.3 psi (21,000 dynes/cm.sup.2) AUL greater than 20 grams/gram. A process for preparing such a composition.
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