Hydrogel capable of absorbing blood and/or body fluids
AssigneeBASF SE
InventorsMartin Beck, Volker Frenz, Anna Kowalski, Elisabeth Selzer, Ernst Jürgen Bauer, Harald Keller, Bernhard Steinmetz
Life of this patent
Estimating the term…
Abstract
A hydrogel having a floatability where from 40% to 90% of a solution and/or suspension to be thickened are thickened starting from the surface of the liquid and the rest of the solution and/or suspension to be thickened is thickened starting from the bottom of the container, a process for preparing the hydrogel and also its use for absorbing blood and/or body fluids, especially in hygiene articles, or for thickening aqueous solutions and/or suspensions, especially for thickening medical wastes.
Claims13
A hydrogel having a floatability and having a thickening capability wherein the hydrogel thickens from 40% to 90% of an aqueous solution or suspension starting from the surface of the solution or suspension and the hydrogel thickens the rest of the solution or suspension starting from the bottom of a container for the solution or suspension, said hydrogel comprising superabsorbent polymer particles coated with 0.05% to 1%, by weight, of a hydrophobic compound, wherein the hydrophobic compound is a hydrophobicized silica or a hydrophobicized mixture of silicas and aluminas, and 0.05% to 4%, by weight, of a multivalent cation;
- and
- said hydrogel having a solidification time of less than 120 seconds upon contact with the solution or suspension and having a blood absorbance of at least 10 g/g.
Dependencies are inferred from the claim text.