Electrical insulating oils

Details Electrical insulating oils Electrical insulating oils

1976-06-15

1978-01-17

Levine, Herbert

Compositions

Electrolytes for electrical devices

208 14, 208 19, 252 73, H01B 322

Patent

active

040691667

ABSTRACT:
An electrical insulating oil having excellent thermal stability and low-temperature properties, which consists essentially of (A) 80-99 parts by weight of refined oil having a low sulphur content and considerable aromatic content and being prepared from a distillate contained in a fraction boiling between 230.degree.-430.degree. C of a paraffin or mixed base crude oil origin, (B) 1-20 parts by weight of a refined oil prepared from a lubricating oil fraction of a mineral oil boiling between 230.degree.-460.degree. C of any crude oil origin and, if desired, (C) 0.001-1.0 part by weight of an essentially ethylene-propylene copolymer as the additive.

REFERENCES:
patent: 2190918 (1940-02-01), Goethal et al.
patent: 3617473 (1971-11-01), Lipscomb
patent: 3627673 (1971-12-01), Sproule et al.
patent: 3657132 (1972-04-01), Gourlaouen et al.
patent: 3953319 (1976-04-01), Chesluk et al.

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