Patent ID: 6245410
Filing Date: 2001-06-12
Classification: A61L,Y10S,Y10T

Abstract:
An absorber element of at least one composite material having absorbent elements on a support in which a plurality of elements (4) of a superabsorbent foam are arranged on at least one support (3) in a grid pattern at distances so that the elements (4) in the swollen state touch at their peripheries away from the support but expand to only a limited extent near the support, the absorber elements being obtained by(I) foaming a polymerizable aqueous mixture which consists of(a) monoethylenically unsaturated monomers containing acid groups which are at least 50 mol % neutralized,(b) optionally with other monoethylenically unsaturated monomers,(c) crosslinkers,(d) initiators,(e) from 0.1 to 20% by weight of at least one surfactant,(f) optionally with one or more solubilizers and(g) optionally with thickeners, foam stabilizers, polymerization regulators, fillers and/or cell nucleating agents,the foaming being performed by dispersing fine bubbles of a gas inert to free radicals,(II) applying the foamed mixture to the support in a grid pattern, and(III) polymerizing the foamed mixture, forming a foamed hydrogel and optionally setting the water content of the foamed polymer to from 1 to 60% by weight.