Electrical insulating oil

Details Electrical insulating oil Electrical insulating oil

1976-02-10

1978-02-07

Levine, Herbert

Compositions

Electrolytes for electrical devices

208 14, 208 19, H01B 322

Patent

active

040726207

ABSTRACT:
An electrical insulating oil having excellent oxidation stability, thermal stability, corona resistance and corrosion resistance and, if desired, low-temperature properties, which consist essentially of a blend of a refined oil (I) derived from a paraffin or mixed base crude oil, a refined oil (II) prepared from a lubricating oil fraction of a mineral oil and, if desired, an amorphous ethylene-propylene copolymer (III). The oils (I) and (II) may be blended together in ratios by weight of 80- 99:1- 20. In one embodiment, the copolymer may be added to the blend of the oils (I) and (II) in ratios by weight of 0.001- 1.0 to 100 thereby to obtain an electrical insulating oil having excellent low-temperature properties in addition to the above-mentioned excellent properties.

REFERENCES:
patent: 2190918 (1940-02-01), Goethel et al.
patent: 3657132 (1972-04-01), Gourlaouen et al.
patent: 3804743 (1974-04-01), Mills et al.
patent: 3925220 (1975-12-01), Mills
Bruins "Plasticizer Technology", vol. 1, 1965, pp. 79-80.

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