| 摘要 |
The present invention relates to hydrophilic, swellable graft copolymers composed, in random distribution, of 0.5 to 20% by weight of radicals of the general formula I <IMAGE> (I) of 79 to 99% by weight of radicals containing an acidic group, of the general formula II <IMAGE> (II) and of 0.1 to 2% by weight of radicals of a crosslinking agent which are derived from monomers having at least two olefinically unsaturated double bonds, and the radicals X, Z, m, n, z and also R1 to R4 are defined as given in the description, a process for the preparation of these graft copolymers and also their use as absorbents for water and aqueous solutions.
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