Semi-conductive, moisture barrier shielding tape and cable
    8.
    发明授权
    Semi-conductive, moisture barrier shielding tape and cable 失效
    半导电,防潮屏蔽胶带和电缆

    公开(公告)号:US4454379A

    公开(公告)日:1984-06-12

    申请号:US380584

    申请日:1982-05-21

    IPC分类号: H01B7/282 H01B7/18

    CPC分类号: H01B7/2825

    摘要: New and improved shielding tapes for use in electric cable construction are disclosed and include a metallic foil treated on both sides with a conductive adhesion promoting material and surrounded on both sides with a continuous layer of a semi conductive polymer material. The tapes provide an improved electrostatic shield and moisture barrier for cables destined to be utilized in extended underground installation applications.

    摘要翻译: 公开了用于电缆结构的新的和改进的屏蔽带,并且包括在两侧用导电粘合促进材料处理的金属箔,并且在两侧用连续的半导体聚合物材料层包围。 这些胶带为长期的地下安装应用中使用的电缆提供了改进的静电屏蔽和防潮层。

    Method for dehydrochlorinating
1,1,1-trichloro-2,2-bis(4-hydroxyphenyl)ethane and products obtained
therefrom
    9.
    发明授权
    Method for dehydrochlorinating 1,1,1-trichloro-2,2-bis(4-hydroxyphenyl)ethane and products obtained therefrom 失效
    1,1,1-三氯-2,2-双(4-羟基苯基)乙烷的脱氯化氢及其制得的产品的方法

    公开(公告)号:US4221901A

    公开(公告)日:1980-09-09

    申请号:US919461

    申请日:1978-06-27

    IPC分类号: C08G64/04 C08G63/62

    CPC分类号: C08G64/045

    摘要: A method is described for dehydrochlorinating 1,1,1-trichloro-2,2-bis(4-hydroxyphenyl)ethane employing a refluxing dipolar aprotic solvent, such as dimethylformamide, containing a lithium halide catalyst to produce a crystalline product consisting essentially of 1,1-dichloro-2,2-bis(4-hydroxyphenyl)ethylene. The crystalline product can be isolated in substantially pure form and converted to a high impact, flame retardant polycarbonate.

    摘要翻译: 描述了使用含有卤化锂催化剂的回流偶极非质子溶剂(例如二甲基甲酰胺)对1,1,1-三氯-2,2-二(4-羟基苯基)乙烷进行脱氯化氢以产生基本上由1 ,1-二氯-2,2-双(4-羟基苯基)乙烯。 结晶产物可以以基本上纯的形式分离并转化成高冲击阻燃聚碳酸酯。