Sealants for Fetal Membrane Repair
    15.
    发明申请
    Sealants for Fetal Membrane Repair 有权
    胎膜修复密封剂

    公开(公告)号:US20110027250A1

    公开(公告)日:2011-02-03

    申请号:US12845949

    申请日:2010-07-29

    CPC classification number: A61L27/3604 A61L24/046 C08L71/02

    Abstract: The present invention provides a method for preventing or repairing damage to a fetal membrane. In one embodiment, the method comprises contacting a fetal membrane with a composition comprising a four-armed catechol-terminated polyethylene glycol (cPEG) and a biocompatible oxidant. In one embodiment, the four-armed cPEG and the biocompatible oxidant are initially contained in separate solutions, and the solutions are mixed to form the composition just prior to or at the same time that the composition contacts the fetal membrane.

    Abstract translation: 本发明提供了防止或修复对胎膜的损伤的方法。 在一个实施方案中,该方法包括使胎膜与包含四臂的邻苯二酚封端的聚乙二醇(cPEG)和生物相容性氧化剂的组合物接触。 在一个实施方案中,四臂cPEG和生物相容性氧化剂最初包含在单独的溶液中,并且将溶液混合以在组合物接触胎膜之前或同时形成组合物。

    Method of preparing layered silicate-epoxy nanocomposites
    18.
    发明授权
    Method of preparing layered silicate-epoxy nanocomposites 失效
    层状硅酸盐 - 环氧纳米复合材料的制备方法

    公开(公告)号:US5554670A

    公开(公告)日:1996-09-10

    申请号:US304574

    申请日:1994-09-12

    Abstract: An epoxy-silicate nanocomposite is prepared by dispersing an organically modified smectite-type clay in an epoxy resin together with diglycidyl ether of bisphenol-A (DGEBA), and curing in the presence of either nadic methyl anhydride (NMA), and/or benzyldimethyl amine (BDMA), and/or boron trifluoride monoethylamine (BTFA) at 100.degree.-200.degree. C. Molecular dispersion of the layered silicate within the crosslinked epoxy matrix is obtained, with smectite layer spacings of 100 .ANG. or more and good wetting of the silicate surface by the epoxy matrix. The curing reaction involves the functional groups of the alkylammonium ions located in the galleries of the organically modified clay, which participate in the crosslinking reaction and result in direct attachment of the polymer network to the molecularly dispersed silicate layers. The nanocomposite exhibits a broadened T.sub.s at slightly higher temperature than the unmodified epoxy. The dynamic storage modulus of the nanocomposite was considerably higher in the glassy region and very much higher in the rubbery plateau region when compared to such modulus in the unmodified epoxy.

    Abstract translation: 通过将环氧树脂中的有机改性蒙脱石型粘土与双酚-A的二缩水甘油醚(DGEBA)一起分散,并在无机甲基酸酐(NMA)和/或苄基二甲基铵的存在下固化来制备环氧硅酸盐纳米复合材料 胺(BDMA)和/或三氟化硼单乙胺(BTFA)在100°-200℃下得到交联环氧树脂基质中层状硅酸盐的分子分散体,蒙皂石层间隔为100Ag或更高,并且良好的润湿性 硅酸盐表面由环氧树脂基体。 固化反应涉及位于有机改性粘土的画廊中的烷基铵离子的官能团,其参与交联反应并导致聚合物网络直接附着于分子分散的硅酸盐层。 纳米复合材料在略高于未改性环氧树脂的温度下显示出更宽的Ts。 与未改性环氧树脂中的这种模量相比,纳米复合材料的动态储能模量在玻璃状区域相当高得多,而在橡胶状平台区域的动态储能模量非常高。

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