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    • 5. 发明申请
    • ELECTRICAL WIRE AND CABLE
    • 电线和电缆
    • WO1989000756A1
    • 1989-01-26
    • PCT/GB1988000545
    • 1988-07-08
    • RAYCHEM LIMITEDPENNECK, Richard, JohnDAY, Stephen
    • RAYCHEM LIMITED
    • H01B03/30
    • H01B3/427C08L79/08H01B3/30H01B3/306H01B3/423C08L2666/04C08L2666/24
    • An electrical wire or cable has electrical insulation or a jacket which comprises a cross-linked blend of: (a) an aromatic polymer that has a char residue of at least 25 % at 850 DEG C and contains one or more aliphatic moieties; and (b) a polymer having a char residue of not more than 15 % at 850 DEG C; the blend containing at least 20 % by weight of the aromatic polymer based on the total weight of the polymer but having an overall molar carbon to hydrogen ratio of not more than 1.15. The wire insulation exhibits reduced erosion compared with the uncross-linked insulation when subjected to a tracking test, and exhibits a disproportionately reduced char residue, compared with the char residue of the components, which leads to a high degree of electrical tracking resistance.
    • 电线或电缆具有电绝缘或夹套,其包含以下交联共混物:(a)在850℃下具有至少25%的焦炭残余物并含有一个或多个脂族部分的芳族聚合物; 和(b)在850℃下具有不超过15%的焦炭残留物的聚合物; 所述共混物包含至少20重量%的芳族聚合物,基于聚合物的总重量,但总碳摩尔比不大于1.15。 与进行跟踪试验时的非交联绝缘体相比,电线绝缘体的侵蚀减少,与元件的焦炭残留物相比,表现出不成比例地降低的焦炭残留量,导致高的电追踪电阻。