Low density polymers and methods of making and using same
    13.
    发明授权
    Low density polymers and methods of making and using same 失效
    低密度聚合物及其制造和使用方法

    公开(公告)号:US6020387A

    公开(公告)日:2000-02-01

    申请号:US934744

    申请日:1997-09-22

    IPC分类号: C08G18/36 C08K3/00 C08G18/06

    CPC分类号: C08G18/36 C08K3/0008

    摘要: A low density polymer composition including a polymer component capable of being cured, a low density filler in an amount sufficient to reduce the density of the polymer and a thixotrope present in a sufficient amount to impart a sufficient viscosity and to inhibit separation of the filler from the polymer until after the polymer is cured. The resulting lightweight, filled polymer composition is a strong electrical insulator, has low shrinkage, a low coefficient of thermal expansion, low cured density and a soft filler that does not harden the polymer. Methods of preparing and using the low density polymer compositions are also disclosed.

    摘要翻译: 包含能够固化的聚合物组分的低密度聚合物组合物,足以降低聚合物密度的量的低密度填料和足以赋予足够粘度并且抑制填料的分离的触变剂 直到聚合物固化之后。 所得到的轻质填充聚合物组合物是强电绝缘体,具有低收缩率,低热膨胀系数,低固化密度和不使聚合物硬化的软填料。 还公开了制备和使用低密度聚合物组合物的方法。

    Process for using ester plasticized polyurethanes for sealing electrical
devices
    16.
    发明授权
    Process for using ester plasticized polyurethanes for sealing electrical devices 失效
    使用酯增塑聚氨酯密封电气设备的方法

    公开(公告)号:US4705724A

    公开(公告)日:1987-11-10

    申请号:US945981

    申请日:1986-12-24

    摘要: A plasticized polyurethane gel system comprising the reaction product of an isocyanate compound and a polyol in the presence of an ester plasticizer compound having a total solubility parameter of between about 8.3 and 8.9 or between about 9.1 and 9.7. Said polyurethane systems are cured, cross-linked, non-spewing, grease compatible, and reenterable. This extended polyurethane is further characterized as having superior insulating properties so that it can be used of repairing, encapsulating or reclaiming electrical or telecommunication cables as well as for hard volume encapsulants or general elastomer use.

    摘要翻译: 一种增塑聚氨酯凝胶体系,其包含异氰酸酯化合物和多元醇在总溶解度参数为约8.3至8.9之间或约9.1至9.7之间的酯增塑剂化合物存在下的反应产物。 所述聚氨酯体系被固化,交联,不喷出,润滑脂相容并且可重新连接。 该延伸的聚氨酯的特征还在于具有优异的绝缘性能,使得其可用于修复,封装或回收电缆或通信电缆以及硬体积密封剂或一般弹性体使用。

    Grease compatible extended polyurethanes
    17.
    发明授权
    Grease compatible extended polyurethanes 失效
    润滑脂相容的延伸聚氨酯

    公开(公告)号:US4596743A

    公开(公告)日:1986-06-24

    申请号:US713378

    申请日:1985-03-19

    摘要: A grease compatible cyclic olefin extended polyurethane comprising the reaction product of an isocyanate terminated polyisocyanate with a polyol in the presence of a cyclic olefin extender and, a plasticizer having a total solubility parameter of between about 8.3 and 8.9 or about 9.1 and 9.7. Certain extended polyurethanes are characterized as being reenterable, such that they can be used for repairing, encapsulation or reclaiming electrical or telephone cables. Alternate formulations can be used as hard volume encapsulants for general elastomer use.

    摘要翻译: 一种润滑脂相容的环烯烃延长的聚氨酯,其包含异氰酸酯封端的多异氰酸酯与多元醇在环状烯烃增量剂存在下的反应产物,以及总溶解度参数为约8.3至8.9或约9.1至9.7的增塑剂。 某些延伸的聚氨酯的特征在于可重新连接,使得它们可用于修理,封装或回收电气或电话电缆。 替代制剂可用作用于一般弹性体使用的硬体积密封剂。