Microcellular polyurethane elastomer containing urea groups
    1.
    发明授权
    Microcellular polyurethane elastomer containing urea groups 失效
    含有尿素基团的微孔聚氨酯弹性体

    公开(公告)号:US6037383A

    公开(公告)日:2000-03-14

    申请号:US91638

    申请日:1998-10-07

    摘要: A microcellular PU elastomer having improved dynamic mechanical properties and based on an isocyanate component consisting essentially of 4,4'-MDI and further customary constituents has a physicochemical structure which, in the gel permeation chromatograph (GPC) of a solution of the microcellular polyurethane elastomer prepared at 90.degree. C. in N,N-dimethylformamide containing 1 percent of di-n-butylamine measured against polymethyl methacrylate (PMMA) as standard, displays a signal occurring in addition to low molecular weight main signal and comprising one or more peaks at an (apparent) molar mass of greater than 250,000 g/mol which becomes smaller or disappears on addition of lithium chloride to this solution, and a urea content of from 14 to 18% by weight.A process is also provided for preparing such a microcellular PU elastomer having improved dynamic mechanical properties. The microcellular PU elastomers can be used for producing damping elements.

    摘要翻译: PCT No.PCT / EP96 / 05640 Sec。 371日期:1998年10月7日 102(e)日期1998年10月7日PCT 1996年12月16日PCT公布。 出版物WO97 / 23535 日期1997年7月3日具有改善的动态力学性能并基于由4,4'-MDI和其他常规组分组成的异氰酸酯组分的微孔PU弹性体具有物理化学结构,其在溶液的凝胶渗透色谱(GPC) 在90℃下在含有1%二正丁胺的N,N-二甲基甲酰胺中制备的聚氨基甲酸甲酯(PMMA)作为标准的微孔聚氨酯弹性体显示除了低分子量主信号之外还发生的信号,并且包含 摩尔质量大于250,000g / mol的一个或多个峰变得更小或在向该溶液中加入氯化锂时消失,尿素含量为14至18重量%。 还提供了一种制备这种具有改进的动态力学性能的微孔PU弹性体的方法。 微孔PU弹性体可用于制造阻尼元件。

    Microcellular urea-containing polyurethane elastomer
    2.
    发明授权
    Microcellular urea-containing polyurethane elastomer 失效
    含微孔尿素的聚氨酯弹性体

    公开(公告)号:US6063824A

    公开(公告)日:2000-05-16

    申请号:US91697

    申请日:1998-11-18

    摘要: A microcellular PU elastomer having improved dynamic-mechanical properties and based on an isocyanate component consisting essentially of 4,4'-MDI and also further customary constituents has, after heating at from 100 to 120.degree. C. for from 8 to 24 hours, a melting range of from 130.degree. C. as the minimum lower limit to 230.degree. C. as a minimum upper limit, measured by differential scanning calorimetry (DSC) at a heating rate of 20.degree. C./min, and a urea content of from 14 to 18% by weight.A process is also provided for preparing such a microcellular PU elastomer having improved dynamic mechanical properties. The microcellular PU elastomers can be used for producing damping elements.

    摘要翻译: PCT No.PCT / EP96 / 05639 Sec。 371日期:1998年11月18日 102(e)1998年11月18日日期PCT 1996年12月16日PCT公布。 公开号WO97 / 23534 日期1997年7月3日具有改进的动态力学性能并且基于由4,4'-MDI组成的异氰酸酯组分的微孔PU弹性体以及另外的常规组分在100至120℃下加热8 至20小时,通过差示扫描量热法(DSC)以20℃/分钟的加热速率测量的最小下限为230℃的熔点为最小上限,为最小上限,以及 尿素含量为14至18重量%。 还提供了一种制备这种具有改进的动态力学性能的微孔PU弹性体的方法。 微孔PU弹性体可用于制造阻尼元件。