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    • 6. 发明授权
    • Crosslinked polysaccharides, process for their preparation and their use
    • 交联多糖,其制备方法及其用途
    • US5688776A
    • 1997-11-18
    • US302831
    • 1994-09-16
    • Kurt Heinz BauerJuergen Betzing
    • Kurt Heinz BauerJuergen Betzing
    • A61K9/16A61K9/20A61K9/22A61K9/28A61K9/36A61K9/52C08B37/00A61K31/715C08B37/02C08B37/06
    • C08B37/0087A61K9/1652A61K9/205A61K9/286C08B37/00
    • The invention relates to polysaccharides which are crosslinked with bifunctional crosslinkers and are no longer water-soluble but are still biodegradable, have a swelling of from 100 to 1000%, where the swelling, which means the percentage gain in weight, is determined by the following equation: ##EQU1## in which A is the percentage gain in weight, W.sub.o is the weight of the dry polymer and W.sub.t is the weight of the swollen polymer saturated with water. It likewise relates to a process for preparing the crosslinked polysaccharides and to the use of the crosslinked polysaccharides for coating and/or embedding medicinal active substances or drug compositions. The invention furthermore relates to a drug which contains an active substance which acts in the large intestine or an active substance which is broken down on passing through the stomach or small intestine, coated with or embedded in one of the crosslinked polysaccharides.
    • PCT No.PCT / EP93 / 00225 Sec。 371日期1994年9月16日 102(e)日期1994年9月16日PCT提交1993年2月1日PCT公布。 第WO93 / 19095号公报 日期1993年9月30日本发明涉及与双功能交联剂交联并且不再是水溶性但仍可生物降解的多糖,具有100至1000%的溶胀,其中溶胀,这意味着重量增加百分比, 由以下等式确定:其中A是重量增益百分比,Wo是干聚合物的重量,Wt是用水饱和的溶胀聚合物的重量。 它同样涉及制备交联多糖的方法,以及交联多糖用于涂覆和/或包埋药物活性物质或药物组合物的用途。 本发明还涉及一种药物,其含有作用于大肠中的活性物质或活性物质,所述活性物质在穿过胃或小肠时分解,涂覆或嵌入其中一种交联多糖中。