Patent ID: 8829107
Filing Date: 2014-09-09
Classification: A01N,A61L,B01J,C08F

Abstract:
1. A method for the production of a superabsorbent composition comprising the process steps: i. producing a hydrogel by radical polymerization of an aqueous monomer solution containing an ethylenically unsaturated acid-group-containing monomer including acrylic acid and methacrylic acid and a crosslinking agent, wherein the monomer solution has a monomer content in the range from 20 to 30%; ii. drying the hydrogel to obtain a water-absorbing polymer structure; iii. surface post-crosslinking of the water-absorbing polymer structure with a post-crosslinking agent to obtain a surface-crosslinked water-absorbing polymer structure; iv. incorporating from about 5 wt % to 20 wt % of a water-soluble powder starch compound based on the weight of the superabsorbent composition wherein the powder starch compound is water-soluble if at least about 30 g of powder starch compound may be dissolved in a liter of deionized water at a temperature of 20° C., in at least two of the following variants