Loading patent…
AssigneeBASF SE
InventorsMarkus Toennessen, Marc Haefner, Karsten Kraemer, Christophe Bauduin, Thomas Daniel
Estimating the term…
A method of measuring indices in superabsorbents, by initially charging excess aqueous solution or dispersion, swelling the superabsorbent in the initially charged aqueous solution or dispersion while stirring, dissolving or dispersing a component A in the aqueous solution or dispersion, measuring the enrichment of component A in the aqueous solution or dispersion during the swelling of the superabsorbent, using the enrichment of component A in the aqueous solution or dispersion to measure the time-dependent swelling characteristics and using these to determine the swelling constant k or the characteristic swell time τ, the index being dependent on the permeability of the superabsorbent, and ascertaining the index by means of a correlation measured beforehand between swelling constant k and index or characteristic swell time τ and index.
A method of measuring an index in a superabsorbent comprising initially charging excess aqueous solution or dispersion, swelling the superabsorbent in the initially charged aqueous solution or dispersion while stirring, dissolving or dispersing at least one component A in the aqueous solution or dispersion and measuring an enrichment of the at least one component A in the aqueous solution or dispersion during the swelling of the superabsorbent, wherein the enrichment of component A in the aqueous solution or dispersion is used to measure the time-dependent swelling characteristics and these are used to determine the swelling constant k or the characteristic swell time τ, the index is dependent on the permeability of the superabsorbent, and the index is ascertained by a correlation measured beforehand between swelling constant k and index or characteristic swell time τ and index.
Dependencies are inferred from the claim text.