A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
A61F 13/15 (2006.01) A61F 13/20 (2006.01) A61L 15/18 (2006.01) A61L 15/60 (2006.01)
Patent
CA 2389238
The present invention is directed to a superabsorbent composition comprising: an underneutralized superabsorbent polymer in which at least 30 % of the functional groups of the polymer are in free acid form; and a layered double hydroxide anionic clay. The underneutralized superabsorbent polymer is believed to act as an Na+ trap and the layered double hydroxide anionic clay is believed to act as a Cl- trap, thereby removing the electrolytes from the solution and improving the absorptive capacity of the superabsorbent composition. The preferred types of layered double hydroxide anionic clays useful in the present invention are hydrotalcite clays with rehydrated hydrotalcite being the most preferred. The present invention also discloses an absorbent article comprising the superabsorbent composition.
L'invention concerne une composition superabsorbante comprenant: un polymère superabsorbant sous-neutralisé dans lequel au moins 30 % des groupes fonctionnels du polymère se présentent sous forme d'acide libre; et une argile anionique d'hydroxyde double stratifié. Le polymère superabsorbant sous-neutralisé est réputé agir comme un piège à Na+ et l'argile anionique d'hydroxyde double stratifié est réputé agir comme un piège à Cl, les électrolytes étant ainsi supprimés de la solution et la capacité d'absorption de la composition superabsorbante étant ainsi accrue. Les types préférés d'argiles anioniques d'hydroxyde double stratifié, utiles dans la composition de l'invention sont les argiles du type hydrotalcites, et idéalement de l'hydrotalcite réhydraté. L'invention porte également sur un article absorbant comprenant ladite composition absorbante.
Paragon Trade Brands Inc.
Piasetzki & Nenniger Llp
LandOfFree
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