Method for cross-linking hydrogels with bis- and poly-2-oxazolidinones
    54.
    发明授权
    Method for cross-linking hydrogels with bis- and poly-2-oxazolidinones 失效
    用双 - 和多 - 2-恶唑烷酮交联水凝胶的方法

    公开(公告)号:US06503979B1

    公开(公告)日:2003-01-07

    申请号:US09622853

    申请日:2000-08-28

    IPC分类号: C08F830

    摘要: The invention contains a process for the surface postcrosslinking of water-absorbing polymers in which the polymers are treated with a surface postcrosslinking solution and during or after the treatment are postcrosslinked by means of an increase in temperature and are dried, wherein the crossiinker comprises a bis-2-oxazolidinone or a poly-2-oxazolidinone comprising structural units of the formula in which R1 is branched or unbranched C1-C18-alkylene, branched or unbranched C2-C18-alkenylene, C5-C18-cycloalkylene, phenylene, naphthylene, anthracenylene, hydrocarbon-substituted phenylene, naphthylene or anthracenylene or another substituted or unsubstituted C6-C18-arylene radical, R2 is branched or unbranched C1-C18-alkylene and n is an integer from 1 to 50 or a mixture of bis-2-oxazolidinones and poly-2-oxazolidinones dissolved in an inert solvent.

    摘要翻译: 本发明包含用于表面后吸附聚合物的方法,其中聚合物用表面后交联溶液处理,并且在处理期间或之后通过温度升高进行后交联并干燥,其中交联剂包含双 -2-恶唑烷酮或包含结构单元的聚-2-恶唑烷酮,其中R1是支链或非支链C1-C18-亚烷基,支链或非支链C2-C18-亚烯基,C5-C18-亚环烷基,亚苯基,亚萘基,蒽亚基, 烃取代的亚苯基,亚萘基或亚蒽基或其它取代或未取代的C 6 -C 18亚芳基,R 2是支链或非支链的C 1 -C 18 - 亚烷基,n是1至50的整数或双-2-恶唑烷酮和聚 -2-恶唑烷酮溶解在惰性溶剂中。