Enhancing absorption rates of superabsorbents by incorporating a

Details Enhancing absorption rates of superabsorbents by incorporating a Enhancing absorption rates of superabsorbents by incorporating a

1991-10-22

1992-06-02

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 94, 521125, 521149, 521150, 521 64, L08J 908

Patent

active

051187191

ABSTRACT:
An improved superabsorbent polymer having increased rate of water absorption is obtained by the addition, preferably prior to polymerization, of a carbonate blowing agent to a monomer solution of the monomers used to form the superabsorbent polymer. Preferred monomers include (meth)acrylic acids, preferably partially neutralized prior to polymerization and appropriate cross-linking agents. The carbonate cross-linking agents are any carbonate salt soluble or dispersible in the monomer solution, prior to polymerization. The multi-valent cationic salts of carbonate are preferred, especially the complex carbonates, for example, of magnesium.

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