US 12,233,400 B2
High-capacity superabsorbent materials and methods of making same
Kaiyuan Yang, Cumming, GA (US); Xuedong Song, Alpharetta, GA (US); Teresa E. Peterson, Alpharetta, GA (US); and Wade R. Thompson, Cumming, GA (US)
Assigned to Kimberly-Clark Worldwide, Inc., Neenah, WI (US)
Appl. No. 18/832,032
Filed by Kimberly-Clark Worldwide, Inc., Neenah, WI (US)
PCT Filed Feb. 28, 2022, PCT No. PCT/US2022/018138
§ 371(c)(1), (2) Date Jul. 22, 2024,
PCT Pub. No. WO2023/163721, PCT Pub. Date Aug. 31, 2023.
Prior Publication US 2024/0416321 A1, Dec. 19, 2024
Int. Cl. A61L 15/56 (2006.01); A61F 13/00 (2024.01); A61L 15/46 (2006.01); B01J 20/26 (2006.01); B01J 20/30 (2006.01); C08F 222/02 (2006.01)
CPC B01J 20/267 (2013.01) [B01J 20/3021 (2013.01); B01J 20/3071 (2013.01); B01J 20/3085 (2013.01)] 20 Claims
 
1. A method of making a superabsorbent polymer comprising:
a polymer backbone comprising:
a neutralized backbone monomer;
a neutralized backbone monomer complexed with a coordination complex comprising a metal ion with an oxidation state of at least 2;
optionally an un-neutralized backbone monomer; and
optionally an un-neutralized backbone monomer complexed with a coordination complex comprising a metal ion with an oxidation state of at least 2; and
optionally a crosslinker, the method comprising:
forming a complex between a monomer and a salt comprising a metal ion with an oxidation state of at least 2;
forming a mixture comprising
a solvent;
the complex between a monomer and a salt comprising a metal ion with an oxidation state of at least 2; and
optionally a crosslinker;
initiating a reaction; and
reacting the mixture.