公开(公告)号：EP1654014B1

公开(公告)日：2010-12-29

申请号：EP04801842.8

申请日：2004-04-02

申请人： Evonik Stockhausen, LLC

发明人： QIN, Jian ,  ZHANG, Xiaomin ,  MILLER, Debra, Ann

IPC分类号： A61L15/60

CPC分类号： A61L15/60 ,  Y10S522/909

摘要： An absorbent material formed at least in part of a cross-linked polymer. The absorbent material has a centrifuge retention capacity as determined by a Centrifuge Retention Capacity Test of at least about 20 g/g and a gel bed permeability under load as determined by a Gel Bed Permeability Under Load Test of at least about 200x10-9 cm2 or a free swell gel bed permeability as determined by a Free Swell Gel Bed Permeability Test of at least about 2,500x10-9 cm2. The cross-linked polymer may comprise either at least about 75 weight percent anionic polymer or at least about 75 weight percent cationic polymer. In one embodiment, the cross-linked polymer is surface treated with a water soluble non-cross-linked polymer having a potential for becoming charged opposite that of the cross-linked polymer.