| 摘要 |
ELECTRICAL INSULATING OIL COMPOSITIONS of the disclosure : An electrical insulating oil composition consisting essentially of (I) 50 - 95 parts by weight of a mineral oil-derived electrical insulating oil, (II) 5 - 50 parts by weight of at least one oil selected from arylalkanes, diarylalkanes, polybutene, a highly aromatic oil having a specified refractive index and a hydrocarbon oil-derived hydrofined oil and an electrical insulating oil of naphthenic origin with the proviso that this insulating oil is omitted if the insulating oil (I) is of naphthenic origin, and (III) 0.001 - 1.0% by weight of a hydrocarbon-derived pour point depressant, based on the total weight of the oils (I) and(II). |
