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27 条记录 (耗时 0.037 秒)

    Process for making foamed, sulfur-cured polymer blend compositions
    12.
    发明授权
    Process for making foamed, sulfur-cured polymer blend compositions 失效

    公开(公告)号：US4555528A

    公开(公告)日：1985-11-26

    申请号：US719054

    申请日：1985-04-02

    申请人： Gary L. Loomis

    发明人： Gary L. Loomis

    IPC分类号： C08J9/00 ,  C08J9/06

    CPC分类号： C08J9/0061 ,  C08J2323/08 ,  C08J2327/02 ,  C08J2423/00 ,  C08J2427/00

    摘要： A blend of an E/X/Y copolymer, where E is ethylene, X is a vinyl ester, and Y is carbon monoxide or sulfur dioxide, with a polymer of vinyl halide or vinylidene halide is foamed and cured by dispersing in the blend a blowing agent and sulfur or a sulfur-releasing agent and heating the blend containing those additives at 100.degree.-180.degree. C. for a sufficient time to produce curing and foaming. This process can be run either continuously or batchwise in conventional equipment under conventional conditions in the presence of air. Plasticizers and other materials which often interfere with peroxide cures can be present in the process of this invention. The foamed and cured products have excellent physical properties and ozone resistance.

    Bioresorbable hydrogel compositions for implantable prostheses
    15.
    发明授权
    Bioresorbable hydrogel compositions for implantable prostheses 有权
    用于可植入假体的生物可再吸收水凝胶组合物

    公开(公告)号：US06316522B1

    公开(公告)日：2001-11-13

    申请号：US09395725

    申请日：1999-09-14

    申请人： Gary L. Loomis ,  D. Christian Lentz

    发明人： Gary L. Loomis ,  D. Christian Lentz

    IPC分类号： A61L2700

    CPC分类号： A61K9/2027 ,  A61K9/204 ,  A61L27/34 ,  A61L27/52 ,  A61L27/54 ,  A61L27/58 ,  A61L29/16 ,  A61L31/06 ,  A61L31/10 ,  A61L31/148 ,  A61L31/16 ,  A61L2300/00 ,  A61L2300/236 ,  A61L2300/254 ,  A61L2300/406 ,  A61L2300/408 ,  A61L2300/41 ,  A61L2300/416 ,  A61L2300/42 ,  A61L2300/602 ,  A61L2300/604 ,  A61L2300/606 ,  C08G63/664 ,  C08G63/676 ,  C08G64/183 ,  C08L67/00

    摘要： Crosslinked compositions formed from water-insoluble copolymers are disclosed. These compositions are copolymers having a bioresorbable region, a hydrophilic region and at least two cross-linkable functional groups per polymer chain. Crosslinking of these polymers can be effected in solution in organic solvents or in solvent-free systems. If crosslinking occurs in a humid environment, a hydrogel will form. If crosslinking occurs in a non-humid environment, a xerogel will form which will form a hydrogel when exposed to a humid environment and the resulting crosslinked materials form hydrogels when exposed to humid environments. These hydrogels are useful as components in medical devices such as implantable prostheses. In addition, such hydrogels are useful as delivery vehicles for therapeutic agents and as scaffolding for tissue engineering applications.

    摘要翻译： 公开了由水不溶性共聚物形成的交联组合物。 这些组合物是具有每个聚合物链的生物可再吸收区域，亲水区域和至少两个可交联官能团的共聚物。 这些聚合物的交联可以在有机溶剂中的溶液中或在无溶剂体系中进行。 如果交联发生在潮湿环境中，则会形成水凝胶。 如果交联发生在非潮湿环境中，则将形成干凝胶，当暴露于潮湿环境时，将形成水凝胶，并且当暴露于潮湿环境时，所得到的交联材料形成水凝胶。 这些水凝胶可用作诸如可植入假体的医疗装置中的部件。 此外，这种水凝胶可用作治疗剂的递送载体和组织工程应用的脚手架。