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AssigneeExxon Mobil Chemical Patents Inc.
InventorsMonica Louise Hendewerk, Aspy Keki Mehta, Lawrence Spenadel
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The invention relates to electric power cables, transmission lines or coaxial cables having at least one polymeric component. This polymeric component generally is a conducting, semiconducting, protective or insulating component. The electrical cables of this invention have improved resistance to water treeing and other improved properties. The polymer generally comprises ethylene polymerized with at least one C3 to C20 alpha-olefin and optionally at least one C3 to C20 polyene. The polymer utilized has a density in the range of about 0.86 g/cm3 to about 0.96 g/cm3, a melt index in the range of about 0.2 dg/min. to about 100 dg/min., a molecular weight distribution in the range of about 1.5 to about 30, and a composition distribution breadth index greater than about 45 percent.
A process for producing a wire or cable comprising a conductor and an insulating layer, said insulating layer comprising a polymer selected from the group consisting of ethylene polymerized in the presence of a metallocene catalyst system with at least one comonomer selected from the group consisting of C3 to C20 alpha-olefins and C3 to C20 polyenes, the polymer having a density in the range of about 0.87 g/cm3 to about 0.96 g/cm3, a melt index in the range of about 0.2 dg/min. to about 100 dg/min., a molecular weight distribution in the range of about 1.7 to about 10, and a composition distribution breadth index (CDBI) greater than about 45 percent, said process comprising:
Dependencies are inferred from the claim text.