US 11,718,726 B2
Superabsorbent structure
Michael S. Silverstein, Zikhron-Yaakov (IL); and Tao Zhang, Nesher (IL)
Assigned to Technion Research & Development Foundation Limited, Haifa (IL)
Appl. No. 17/45,506
Filed by Technion Research & Development Foundation Limited, Haifa (IL)
PCT Filed Apr. 25, 2019, PCT No. PCT/IL2019/050465
§ 371(c)(1), (2) Date Oct. 6, 2020,
PCT Pub. No. WO2019/211831, PCT Pub. Date Nov. 7, 2019.
Claims priority of application No. 259063 (IL), filed on May 1, 2018.
Prior Publication US 2021/0189092 A1, Jun. 24, 2021
Int. Cl. C08J 9/28 (2006.01); C08F 293/00 (2006.01)
CPC C08J 9/283 (2013.01) [C08F 293/00 (2013.01); C08J 2201/026 (2013.01); C08J 2201/028 (2013.01); C08J 2201/0543 (2013.01); C08J 2205/05 (2013.01); C08J 2207/10 (2013.01); C08J 2207/12 (2013.01); C08J 2371/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A superabsorbent structure, comprising a covalently crosslinked copolymer having a microstructure templated by an external phase of a high internal phase emulsion (HIPE), wherein said crosslinked copolymer is characterized by:
a) at least one network of covalently crosslinked chains, said crosslinked chains comprise hydrophobic sections and hydrophilic sections, each of said sections is a continuous chain of at least five residues long;
b) a ratio of residues of said hydrophilic sections to residues of said hydrophobic sections, ranging from 1:9 to 9:1; and
c) a total of said residues of said hydrophilic sections and said residues of said hydrophobic sections that is at least 30% of a total of residues in said network,
said crosslinked copolymer is capable of swelling in a polar medium and in an apolar medium, and
wherein said network comprises contiguous chains of at least one hydrophilic section and at least one hydrophobic section.