| 摘要 |
<p>The invention relates to a method for the gel-phase or surface secondary cross-linking of water-absorbent polymers, characterized in that the polymer is treated with a solution for surface secondary cross-linking, during or after treatment undergoes secondary cross-linking by temperature elevation and is then dried. Dissolved in an inert solvent the cross-linking agent contains a compound of formula (I), where R<1> and R<2> independently of each other are H, hydroxy, phenyl or C1-C6-alkyl, R<3> is hydrogen, C1-C12-alkyl, C1-C12-alkenyl or C6-C12-aryl and R<4> and R<5> independently of each other are C1-C12-alkyl, C1-C12-alkenyl, C6-C12-aryl, hydroxy, C1-C12-alkoxy or hydrogen. The invention also relates to water-absorbent polymers obtained according to the above method, and to their use in hygiene articles, packaging materials and non-woven materials.</p> |
