Polysaccharide-based superabsorbent film
AssigneeSCA Hygiene Products AB
InventorsGuiseppee Mensitieri, Fabrizio Porrro, Luigi Nicolais, Alessandro Sannino
Life of this patent
Estimating the term…
Abstract
A superabsorbent polysaccharide can be obtained by crosslinking a polysaccharide or derivative thereof with at least 1% by weight of a flexible spacer having a chain length of at least 9 chain atoms and having terminal activated coupling groups. The flexible spacer may comprise a polyalkyleneglycol with a molecular weight from about 400 to 10,000. The coupling groups may be provided by divinyl sulphone units.
Claims10
A superabsorbent polysaccharide obtained by crosslinking a polysaccharide or derivative thereof with at least 1% by weight of a flexible spacer having a chain length of at least 9 chain atoms and having terminal activated coupling groups.
A process for producing a superabsorbent polysaccharide according to any one of the preceding claims, comprising reacting a polyalkyleneglycol with at least two equivalents of a reagent containing one or more activated double bonds, such as divinyl sulphone, and reacting the polyalkyleneglycol having the double bonds thus obtained with a polysaccharide in the presence of a catalyst.
Dependencies are inferred from the claim text.