Hydrophilic hydrogels with a high swelling capacity and method for producing and using them
    3.
    发明授权
    Hydrophilic hydrogels with a high swelling capacity and method for producing and using them 失效
    具有高溶胀能力的亲水性水凝胶及其制造和使用方法

    公开(公告)号:US06602950B1

    公开(公告)日:2003-08-05

    申请号:US09806944

    申请日:2001-04-06

    IPC分类号: A61L1524

    摘要: A hydrophilic, highly swellable hydrogel based on (co)polymerized monomers or based on graft (co)polymers and prepared by a) free-radically (co)polymerizing one-or more hydrophilic monomers or graft (co)polymerizing one or more hydrophilic monomers onto a grafting base, the average degree of neutralization of the acid-functional monomers being from 0 to 40 mol %, b) comminuting the acidic hydrogel, c) neutralizing the acidic hydrogel to an ultimate degree of neutralization of 50-85 mol % by adding a neutralizing agent, d) drying, grinding and sieving the hydrogel particles characterized by a centrifuge retention and a vertical absorption swell height, each having a specified minimum.value, coupled with an extractables content having a specified maximum value or a centrifuge retention and a vertical absorption swell height, each having a specified minimum value and an extractables content having a specified maximum value.

    摘要翻译: 基于(共)聚合单体或基于接枝(共)聚合物的亲水性,高度可溶胀的水凝胶,并通过自由基(共)聚合一种或多种亲水单体或将一种或多种亲水性单体接枝(共)聚合到 接枝碱,酸官能单体的平均中和度为0〜40摩尔%,b)粉碎酸性水凝胶,c)通过加入酸性水凝胶中和酸性水凝胶至50-85摩尔%的最终中和度 中和剂,d)干燥,研磨和筛分水凝胶颗粒,其特征在于离心机保留和垂直吸收膨胀高度,每个具有特定的最小值,加上具有特定最大值的可提取物含量或离心机保留和垂直吸收 每个具有指定的最小值的膨胀高度,以及具有指定的最大值的可提取物内容。