公开(公告)号：US11596924B2

公开(公告)日：2023-03-07

申请号：US17252764

申请日：2018-06-27

Applicant: KIMBERLY-CLARK WORLDWIDE, INC.

Inventor： Vasily 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

IPC: B01J20/26 ,  B01J20/28

Abstract: 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.

公开(公告)号：US20210252478A1

公开(公告)日：2021-08-19

申请号：US17252764

申请日：2018-06-27

Applicant: KIMBERLY-CLARK WORLDWIDE, INC.

Inventor： Vasily 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

IPC: B01J20/26 ,  B01J20/28

Abstract: 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.