| abstract |
An electrical insulating oil consisting essentially of (1) a mineral oil, as the base oil for the product oil, containing not more than 0.35 wt.% of sulphur and being prepared by refining a distillate containing at least 80 wt.% of a fraction boiling at 230 DEG -430 DEG C at atmospheric pressure, the distillate being obtained by the distillation of paraffin or mixed base crude oils, (2) at least one arylalkane and, if desired, (3) a hydrocarbon-derived pour point depressant. |