| abstract |
PROBLEM TO BE SOLVED: To provide a crosslinked polyaspartic acid (salt) having high productivity, biodegradability and high absorption rate, and a method for producing the same. SOLUTION: The amount of water absorption in physiological saline in one minute, which is obtained by hydrolyzing an imide ring of a crosslinked polysuccinimide obtained by reacting a polysuccinimide with a polyvalent amine compound and measured by a tea bag method, is obtained. A crosslinked polyaspartic acid (salt) having a water absorption of 30 to 150 times its own weight and a water absorption with respect to distilled water of 100 to 1500 times its own weight. In particular, this crosslinked polyaspartic acid (salt) It has a structure that improves the water absorption rate, such as a porous structure. |