Electrical insulating oil and oil-filled electrical appliances
AssigneeNippon Petrochemicals Company, Limited
InventorsAtsushi Sato, Keiji Endo, Shigenobu Kawakami, Hitoshi Yanagishita, Shozo Hayashi
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Abstract
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): ##STR1## wherein R.sub.1 to R.sub.4 '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.
Claims11
An electrical insulating oil comprising at least one member of 1,1-diarylethylenes which are represented by the following formula (II):
- ##STR4## wherein R.sub.5 's and R.sub.6 's are the same or different and each of them is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, p and q are integers from 0 to 3, inclusive, and the total number of carbon atoms in both the R.sub.5 's of p in number and R.sub.6 's of q in number is 0 to 5, inclusive.
An electrical insulating oil composition comprising, as the sole insulating oil components thereof, at least one member of 1,1-diaryethylenes which are represented by the following formula (II):
- ##STR5## wherein R.sub.5 's and R.sub.6 's are the same or different and each of them is a hydrogen atom or an alkyl group, p and q are integers from 0 to 3, inclusive, and the total number of carbon atoms in both the R.sub.5 's of p in number and R.sub.6 's of q in number is 0 to 5, inclusive, and at least one other additive for electrical insulating oil compositions selected from the group consisting of anitoxidants and flame retardants.
Electrical appliances impregnated with an electrical insulating oil comprising at least one of 1,1-diarylalkenes which are represented by the following general formula (I):
- ##STR6## wherein R.sub.1 to R.sub.4 '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.
Dependencies are inferred from the claim text.