It features that the crosslinking reaction it does the poly aspartic acid which

摘要

PROBLEM TO BE SOLVED: To provide a method of manufacturing a biodegradable water absorptive resin having a high water absorption with high productivity at a low cost. ;SOLUTION: A method of manufacturing a crosslinked polyaspartic acid (salt) by reacting a polyaspartic acid (salt) with a polyvalent epoxy compound comprises effecting crosslinking reaction in a polyaspartic acid (salt) aqueous solution having a concentration of the polyaspartic acid (salt) of 41-79 wt.%.;COPYRIGHT: (C)2001,JPO