TRANSFORMER OIL COMPOSITION Russian patent published in 2012 - IPC C10M171/02 C10M169/04 H01B3/22 C10M101/02 C10N40/14 

FIELD: chemistry.

SUBSTANCE: invention relates to a transformer oil composition containing (A) de-asphalted cylinder oil (DACO) with not more than 1 mg/kg benzo[a]pyrene content and total content of benzo[a]anthracene, chrysene, benzo[b]fluoranthene, benzo[j]fluoranthene, benzo[k]fluoranthene, benzo[e]pyrene, benzo[a]pyrene and benzo[a,h]anthracene of not more than 10 mg/kg, in amount of 0.05-5 wt % of the total weight of the transformer oil composition; and (B) one or more base oils, each having viscosity of not more than 4.0 mm²/s at 100°C, in total amount of at least 80 wt % of the total weight of the transformer oil composition. The invention also relates to use of the described transformer oil composition as transformer oil in transformers, regulators, contact breakers, electrical power plant reactors, switch gears, cables and electrical equipment.

EFFECT: high oxidation resistance of transformer oil and said compositions do not require R 45 labelling.

10 cl, 2 tbl, 5 ex