Loading patent…
AssigneeKimberly-Clark Worldwide, Inc.
InventorsVasily A. Topolkaraev, Austin N. Pickett, Karen Goeders, Mark M. Mleziva, Theodore T. Tower, WanDuk Lee, Neil T. Scholl, Lori A. Eslinger, Yuriy Galabura, Dave Soerens, Kazuhiro Takahashi, Yusuke Ueda, Megumi Tomioka
Estimating the term…
Superabsorbent particles have a median size of from about 50 to about 2,000 micrometers and contain a porous network that includes a plurality of nanopores having an average cross-sectional dimension of from about 10 to about 500 nanometers, wherein the superabsorbent particles exhibit a Vortex Time of about 80 seconds or less and a free swell gel bed permeability (GBP) of 5 darcys or more, of 10 darcys or more, of 20 darcys or more, of 30 darcys or more, of 60 darcys or more, or of 90 darcys or more. A method for forming such superabsorbent particles includes forming a composition that contains a superabsorbent polymer and a solvent system; contacting the composition with a non-solvent system to initiate formation of the porous network through phase inversion; removing non-solvent from the composition; and surface crosslinking the superabsorbent particles.
Superabsorbent particles having a median size of from 50 to 2,000 micrometers and containing a porous network that includes a plurality of nanopores having an average cross-sectional dimension of from 10 to 500 nanometers, wherein the superabsorbent particles exhibit a Vortex Time of 80 seconds or less and a free swell gel bed permeability (GBP) of 5 darcys or more.
Dependencies are inferred from the claim text.