Electrical insulating oil and oil-filled electrical appliances.

摘要

An improved electrical insulating oil which is stable in refining treatment and good electrical properties are maintained under high temperature conditions, and oil-filled electrical appliances impregnated therewith. The electrical insulating oil comprises 1,1-diarylalkenes which are represented by the following general formula (I):
<Chemistry id="chema01" num="0001"><Image id="ia01" he="35" wi="78" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R<Sub>1</Sub> to R<Sub>4</Sub>'s are the same or different and each of them Is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and m and n are integers from 0 to 3, inclusive.