US 12,128,380 B2
Superabsorbent polymer material comprising non-crosslinked polyacrylic acid polymer
Arsen Arsenov Simonyan, Koenigstein im Taunus (DE); Natasa Dijakov, Hanau (DE); Dimitris Ioannis Collias, Mason, OH (US); and Yiping Sun, Mason, OH (US)
Assigned to The Procter & Gamble Company, Cincinnati, OH (US)
Filed by The Procter & Gamble Company, Cincinnati, OH (US)
Filed on Oct. 12, 2021, as Appl. No. 17/498,896.
Claims priority of provisional application 63/092,539, filed on Oct. 16, 2020.
Prior Publication US 2022/0143577 A1, May 12, 2022
Int. Cl. B01J 20/26 (2006.01); A61F 13/15 (2006.01); A61L 15/60 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01); C08F 220/06 (2006.01); C08F 222/10 (2006.01); C08J 3/24 (2006.01)
CPC B01J 20/261 (2013.01) [A61F 13/15 (2013.01); A61L 15/60 (2013.01); B01J 20/267 (2013.01); B01J 20/28007 (2013.01); B01J 20/3028 (2013.01); C08F 220/06 (2013.01); C08F 222/102 (2020.02); C08J 3/245 (2013.01); B01J 2220/4812 (2013.01); B01J 2220/4893 (2013.01); B01J 2220/68 (2013.01)] 11 Claims
 
1. A superabsorbent polymer material comprising cross-linked polyacrylic acid and salts thereof, the superabsorbent polymer material further comprising at least 3.0 weight-%, based on the total weight of the superabsorbent polymer material, of soluble polyacrylic acid polymers,
wherein the cross-linked polyacrylic acid and salts thereof have an average distance Rxl between neighboring crosslinks, as calculated for the superabsorbent polymer material loaded with 20 g of saline with 0.9%w NaCl per gram of dry superabsorbent polymer material, and
wherein the at least 3.0 weight-% of soluble polyacrylic acid polymers have an average diameter of gyration 2*Rg, and
wherein the ratio of 2*Rg to Rxl is at least 1.1.