| abstract |
(57) [Summary] [Objective] To provide an improved superabsorbent polymer having an increased absorption rate. The superabsorbent polymer of the present invention is obtained by adding a carbonate blowing agent, preferably prior to polymerization, to a monomer solution of the monomers used to form the polymer and a suitable crosslinking agent. Preferred monomers include acrylics, which are preferably partially neutralized prior to polymerization. Acid is included. The carbonate crosslinker is any carbonate that can be dissolved or dispersed in the monomer solution prior to polymerization. Polyvalent cation carbonates are preferred, especially magnesium, for example, Complex carbonates are preferred. |