| 摘要 |
A cable comprising an electrical conductor or a core of electrical conductor s surrounded by (A) an insulation layer, which is surrounded by, and contiguou s with, (B) an insulation shield layer, the (A) insulation layer comprising: a ) a polymer selected from the group consisting of polyethylene, ethylene/propylene copolymer rubber, ethylene/propylene/diene terpolymer rubber, and mixtures thereof, and, based on the weight of the insulation layer; b) 0.0005 to 1 percent by weight of a 4-substituted 2, 2, 6, 6- tetramethylepiperidine containing one or more of the group wherein R is hydrogen, or an alkoxy or an alkyl, each having 1 to 50 carbon atoms; and th e (B) insulation shield layer comprising: a) a copolymer of ethylene and an unsaturated ester selected from the group consisting of vinyl esters, acryli c acid esters, and methacrylic acid esters wherein the vinyl ester is present in the copolymer in an amount of 10 to 28 percent by weight based on the weight of the copolymer and the acrylic acid esters and methacrylic acid esters are present in an amount of 10 to 50 percent by weight based on the weight of component (B)(a); b)a conductive carbon black; and, based on the weight of t he insulation shield layer; c) at least 5 percent by weight of a copolymer of acrylonitrile and butadiene whereinthe acrylonitrile is present in the copolymer in an amount of 25 to 55 percent by weight based on the weight of component (B) (c). |
