Electrical devices comprising polymeric insulating or semiconduc

Details Electrical devices comprising polymeric insulating or semiconduc Electrical devices comprising polymeric insulating or semiconduc

1991-08-15

1993-09-21

Herbert, Jr., Thomas J.

Stock material or miscellaneous articles

Composite

Of metal

174110R, 427 58, 428 76, 428930, B32B 1504

Patent

active

052467830

ABSTRACT:
Disclosed are electrically conductive and semiconductive devices utilizing polymers having resistance to water treeing and good dielectric properties. The polymer comprises ethylene polymerized with at least one C.sub.3 to C.sub.20 alpha-olefin and optionally at least one C.sub.3 to C.sub.20 polyene. The polymer utilized has a density in the range of about 0.86 g/cm.sup.3 to about 0.96 g/cm.sup.3, 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. For the polymer utilized, the tree rating is generally less than about 40, the power factor is in the range of about 0.0002 to about 0.0005, and the dielectric constant is in the range of about 1.8 to about 2.4.

REFERENCES:
patent: 4144202 (1979-03-01), Ashcaft et al.
patent: 4808561 (1989-02-01), Welborn, Jr.
patent: 4871705 (1989-10-01), Hoel
patent: 4937299 (1990-06-01), Ewen et al.

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