Osmotic devices having vapor-permeable coatings
    59.
    发明授权
    Osmotic devices having vapor-permeable coatings 失效
    具有透气性涂层的渗透装置

    公开(公告)号:US5827538A

    公开(公告)日:1998-10-27

    申请号:US571980

    申请日:1996-01-17

    摘要: An osmotic device that, following the imbibement of water vapor, provides for the controlled release of a beneficial agent to an aqueous environment. The device comprises a hydrophilic formulation including a beneficial agent, and if needed, an osmagent, surrounded by a wall. The wall is formed at least in part of a semipermeable hydrophobic membrane having an average pore size between about 0.1 .mu.m and 30 .mu.m. The pores are substantially filled with a gas phase. The hydrophobic membrane is permeable to water in the vapor phase and the hydrophobic membrane is impermeable to an aqueous medium at a pressure less than about 100 Pa. The beneficial agent is released, for example, by osmotic pumping or osmotic bursting upon imbibement of sufficient water vapor into the device core. These devices minimize incompatibilities between the beneficial agent and ions (such as hydrogen or hydroxyl) or other dissolved or suspended materials in the aqueous medium, since contact between the beneficial agent and the aqueous medium does not occur until after the beneficial agent is released. This results from the semipermeable membrane's selective permeability for water vapor. In addition, the high water fluxes attendant with these vapor-permeable membranes facilitate the delivery of beneficial agents having low solubilities, and the delivery of high dosages of beneficial agents.

    摘要翻译: PCT No.PCT / IB94 / 00114 Sec。 371日期1996年1月17日 102(e)日期1996年1月17日PCT 1994年5月19日PCT PCT。 公开号WO95 / 03033 日期1995年2月2日渗透装置在水蒸汽吸收之后提供有益剂控制释放到含水环境中。 该装置包括亲水性制剂,其包括有益剂,并且如果需要,包含被壁围绕的渗透剂。 所述壁至少部分形成有平均孔径在约0.1μm至30μm之间的半透性疏水膜。 孔基本上充满气相。 疏水膜在气相中是透水的,并且疏水膜在低于约100Pa的压力下对水介质是不可渗透的。有益剂例如通过渗透泵送或渗透的足够的水渗透渗出来释放 蒸汽进入设备核心。 这些装置使有益剂和离子(例如氢或羟基)或水性介质中的其它溶解或悬浮物质之间的不兼容性最小化,因为有益剂和水性介质之间的接触直到有益剂被释放才会发生。 这是由半透膜对水蒸汽的选择性渗透性产生的。 此外,伴随这些透气膜的高水通量促进了具有低溶解度的有益试剂的递送和高剂量的有益试剂的输送。

    Concentrated solutions of polyhydroxyalkylamines and their use
    60.
    发明授权
    Concentrated solutions of polyhydroxyalkylamines and their use 失效
    聚羟基烷基胺的浓缩溶液及其用途

    公开(公告)号:US5744644A

    公开(公告)日:1998-04-28

    申请号:US652148

    申请日:1996-05-23

    申请人: Bernd Papenfuhs

    发明人: Bernd Papenfuhs

    IPC分类号: C07C215/14 C07C211/03

    CPC分类号: C07C215/14

    摘要: It has been found that certain polyhydroxyalkylamines have a particularly good solubility in water, alcohols and in mixtures of water and alcohols. The concentrated solutions described consist essentially of water, alcohols, preferably C.sub.1 -C.sub.3 -alcohols, or water/alcohol mixtures as solvent and at least one dialkylaminopropylglucamine of the formula 1 below Z--NH--CH.sub.2 CH.sub.2 CH.sub.2 --NR.sup.1 R.sup.2 ( 1) where R.sup.1 and R.sup.2 are identical or different and are C.sub.1 -C.sub.4 -alkyl or hydroxyalkyl having from 2 to 4 carbon atoms and Z is a linear polyhydroxyhydrocarbon radical having at least three OH groups which may, if desired, be alkoxylated, The concentrated solutions are particularly useful for preparing the corresponding polyhydroxyalkylcarboxamides.

    摘要翻译: 已经发现,某些多羟基烷基胺在水,醇和水和醇的混合物中具有特别好的溶解性。 所描述的浓缩溶液基本上由水,醇,优选C 1 -C 3醇或作为溶剂的水/醇混合物和至少一种下式Z-NH-CH 2 CH 2 CH 2 -NR 1 R 2(1)的二烷基氨基丙基葡糖胺组成,其中R 1和R 2是 相同或不同的是具有2至4个碳原子的C 1 -C 4 - 烷基或羟烷基,Z是具有至少三个OH基团的直链多羟基烃基团,如果需要,其可以被烷氧基化。浓缩溶液特别可用于制备 相应的多羟基烷基酰胺。