| 摘要 |
An electrical insulating oil composition having satisfactory oxidation stability, electrical properties and low-temperature performances, consisting essentially of (I) an electrical insulating oil having a sulphur content of 0.1-0.35 wt.% prepared from a paraffin or mixed base crude oil and (II) 0.001-1.0% by weight, based on said insulating oil, of an essentially amorphous ethylene-propylene copolymer having an average molecular weight of 10,000-200,000 and a propylene content of 10-70 mol%.
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