US 12,227,642 B2
Polymer gel having sponge-like porous structure
Takamasa Sakai, Tokyo (JP); and Yuichi Tei, Tokyo (JP)
Assigned to The University of Tokyo, Tokyo (JP)
Appl. No. 17/263,403
Filed by The University of Tokyo, Tokyo (JP)
PCT Filed Jul. 29, 2019, PCT No. PCT/JP2019/029574
§ 371(c)(1), (2) Date Jan. 26, 2021,
PCT Pub. No. WO2020/027016, PCT Pub. Date Feb. 6, 2020.
Claims priority of application No. 2018-144002 (JP), filed on Jul. 31, 2018.
Prior Publication US 2021/0155799 A1, May 27, 2021
Int. Cl. C08L 71/02 (2006.01); C08G 65/333 (2006.01); C08G 65/334 (2006.01); C08J 9/28 (2006.01)
CPC C08L 71/02 (2013.01) [C08G 65/33337 (2013.01); C08G 65/334 (2013.01); C08J 9/28 (2013.01); C08J 2205/028 (2013.01); C08J 2371/02 (2013.01); C08J 2401/02 (2013.01); C08J 2471/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A polymer gel in which solvophilic polymer units are cross-linked with each other,
wherein the polymer gel contains a solvent and has a three-dimensional network structure having two regions: a first region in which the solvophilic polymer units are densely present and a second region in which the solvophilic polymer units are sparsely present, and
a mesh size composed of the first region is in the range of 1 to 500 μm.