| abstract |
A hydrogel liquid precursor contains water and one of a compound and a salt of the compound represented by R 1 CH = CR 2 X, where X represents a carboxyl group, carboxylate group, sulfo group, or sulfonate group, R 1 and R 2 each independently represent hydrogen atoms, alkyl groups, aryl groups, carboxyl groups, or alkylcarboxy groups. |