Nippon Oil Company

Shoji Kimura

Noboru Ishida

Yoshiki Kohno

Midori Masunaga

An electrical insulating oil composition consisting essentially of 50-85 parts by weight of a paraffinic or mixed base crude oil-derived electrical insulating oil, 50-15 parts by weight of a naphthenic base crude oil-derived electrical insulating oil, and 0.001-1.0% by weight of a hydrocarbon-derived pour point depressant, based on the total weight of said two oils.

Electrical insulating oil compositions

There is disclosed a rust inhibitor comprising glycerol-1-alkylphenoxy-3-glycerol ether of the formula ##STR1## wherein R is an alkyl group of C.sub.6-18. A composition having rust preventing effect may be obtained by adding the rust inhibitor to a mineral oil.

Rust inhibitors and compositions of same

There is disclosed a rust inhibitor comprising glycerol-1-alkylphenoxy-3-ethyleneglycol ether of the formula ##STR1## wherein R is an alkyl group of C.sub.6-18. A composition having rust preventing effect may be obtained by adding the rust inhibitor to a mineral oil.

There is disclosed a rust inhibitor consisting of glycerol alkyl phenylether of the formula ##STR1## wherein R is an alkyl group of C.sub.6-18. A composition having rust preventing result may be obtained by adding the rust inhibitor to a mineral oil.

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 diarylalkanes, polybutene, an oil having a specified refractive index and a hydrocarbon oil-derived hydrofined oil, 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).

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Chigasaki, Japan

Shoji Kimura