Patent ID: 6472478
Filing Date: 2002-10-29
Classification: A61L,C08F,Y10S,Y10T

Abstract:
A process for the gel or surface postcrosslinking of water-absorbing polymers, comprising; treating polymers with a surface postcrosslinking solution containing a crosslinker, and postcrosslinking and drying by means of an increase in temperature, wherein said crosslinker is a compound of the formula in which R1 and R2 independently of one another are H, hydroxyl, phenyl or C1-C6-alkyl, R3 is hydrogen, C1-C12-alkyl, N-hydroxy-(C2-C6)-alkyl, C1-C12-alkenyl or C6-C12-aryl and R4 a R5 independently of one another are C1-C12-alkoxy or hydrogen, dissolved in an inert solvent.