WATER-ABSORBENT RESIN AND PROCESS FOR ITS PREPARATION

摘要

A PROCESS FOR PREPARING A WATER-ABSORBENT RESIN IS PROVIDED WHICH ENABLES THE WATER-ABSORBENT RESIN TO ENSURE THE REDUCTION IN THE RELEASE AMOUNT OF LIQUID AND THE INCREASE IN THE LIQUID DIFFUSIBILITY. IN THE PREPARATION PROCESS, THE WATER-ABSORBENT RESIN IS PREPARED BY POLYMERIZATION OF A WATER-SOLUBLE ETHYLENIC UNSATURATED MONOMER. THE POLYMERIZATION OF THE WATER-SOLUBLE ETHYLENIC UNSATURATED MONOMER IS ALLOWED TO TAKE PLACE IN THE PRESENCE OF A WATER-ABSORBENT RESIN HAVING A WATER-ABSORBING RATE DIFFERENT FROM THAT OF A WATER-ABSORBENT RESIN RESULTING FROM POLYMERIZATION OF THE WATER-SOLUBLE ETHYLENIC UNSATURATED MONOMER. IN A PREFERRED MODE, THE POLYMERIZATION IS PERFORMED BY A REVERSED-PHASE SUSPENSION POLYMERIZATION METHOD.