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

1992-03-04

1992-10-13

Foelak, Morton

Surgery

Means and methods for collecting body fluids or waste material

Absorbent pad for external or internal application and...

210691, 604367, 521 92, 521149, A61F 1315, A61F 1320

Patent

active

051547139

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.

REFERENCES:
patent: 4693713 (1987-09-01), Chmelir et al.
patent: 4724242 (1988-02-01), Vassileff
patent: 4762888 (1988-08-01), Sun et al.
patent: 5061487 (1991-10-01), Blank et al.

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