Electrical insulation

Details Electrical insulation Electrical insulation

1985-09-13

1986-11-18

Schofer, Joseph L.

Electricity: conductors and insulators

Conduits, cables or conductors

Insulated

174110PM, 252506, 252507, 252511, 524586, H01B 700

Patent

active

046237550

ABSTRACT:
The invention relates to an electrical insulation composition of a polyolefin, which can be used for medium and high voltage from about 10 kV and which resists effectively and permanently the formation of so-called water trees. The insulative polyolefin contains an inorganic oxide additive, in homogeneous distribution therewith, at a concentration of 0.05 to 10% by weight, relative to the total weight of the composition. The additive is absorption-active for heavy metal ions and/or binds heavy metal ions in an ion exchange, with a particle size of up to 50 um or an agglomerate size of up to 100 um. It can be silica, alumina, hydrated alumina or an aluminum silicate. The electrical insulation according to the invention is particularly well-suited for use in cables and wires.

REFERENCES:
patent: 3028355 (1962-04-01), Toy et al.
patent: 4144202 (1979-03-01), Ashcroft
patent: 4212756 (1980-07-01), Ashcraft
patent: 4263158 (1981-04-01), Ashcraft
patent: 4282333 (1981-08-01), Irie
von Wanswer et al., Kabelisolierungen aus Kunststoff, Kunststoffe 71 (1981) pp. 448-453.

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