Acidic superabsorbent polysaccharides

Details Acidic superabsorbent polysaccharides Acidic superabsorbent polysaccharides

A - Human Necessities

61

L

A61L 15/60 (2006.01) A61L 15/28 (2006.01) C08B 15/00 (2006.01) C08B 31/00 (2006.01) C08J 3/24 (2006.01) C08K 5/1515 (2006.01)

Patent

CA 2356849

A process is disclosed for producing an acidic superabsorbent polysaccharide derivative, comprising the steps of: (a) crosslinking at least one polysaccharide containing acidic groups, such as carboxymethyl cellulose and/or 6-carboxy starch, with a crosslinking agent to produce a gel; (b) if necessary, adjusting the pH of the polysaccharide to a value between 3.5 and 5.5; (c) comminuting the acidified polysaccharide gel; and (d) drying the comminuted polysaccharide at elevated temperature. The superabsorbent polysaccharide obtainable by this process has a pH below 5 and provides odour control when contacted with malodorous fluids.

L'invention concerne un procédé permettant de produire un dérivé de polysaccharide superabsorbant acide. Ce procédé comprend les étapes suivantes: (a) réticulation d'au moins un polysaccharide contenant des groupes acides, tel que le cellulose carboxyméthylique et/ou amidon 6-carboxy, au moyen d'un agent de réticulation afin de produire un gel; (b) si nécessaire correction du pH du polysaccharide à une valeur comprise entre 3.5 et 5.5; (c) fragmentation du gel de polysaccharide acidifié; et (d) séchage à chaud du polysaccharide fragmenté. Le polysaccharide superabsorbant obtenu par ce procédé présente un pH inférieur à 5 et permet de neutraliser les odeurs lorsqu'il est mis en contact avec des fluides malodorants.

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