Patent ID: 6348545
Filing Date: 2002-02-19
Classification: C08F,C08L

Abstract:
A water-absorbing resin absorbing high amounts of water obtained by introducing an ionic group into a high-molecular weight material, the high-molecular weight material consisting essentially of the ionic group, 25 to 40 mol % acrylonitrile, 40 to 60 mol % styrene and 10 to 30 mol % of conjugate diene as constituent units, and wherein the ionic group is present in an amount of 5 to 95 mol % based on an entire unit of the high-molecular weight material, and wherein said ionic group comprises at least one selected from the group consisting of a sulfonic acid group and/or its salt, an amide group, a carboxylic acid and/or its salt, a PO(OH)2 group and/or its salt, a â€”CH2PO(OH)2 group and/or its salt, a NO2, a hydroxy group and/or its salt, or a chloromethylated amine group and/or its salt.