CPC C10M 101/02 (2013.01) [C09D 7/63 (2018.01); C09D 11/36 (2013.01); C09J 11/06 (2013.01); C09K 5/10 (2013.01); C09K 8/035 (2013.01); C10G 5/00 (2013.01); C10M 169/04 (2013.01); C10G 2300/1074 (2013.01); C10G 2300/301 (2013.01); C10G 2300/302 (2013.01); C10G 2300/304 (2013.01); C10G 2300/308 (2013.01); C10G 2400/30 (2013.01); C10M 2203/1045 (2013.01); C10M 2203/1065 (2013.01); C10M 2203/1085 (2013.01); C10M 2207/023 (2013.01); C10N 2020/015 (2020.05); C10N 2020/017 (2020.05); C10N 2030/02 (2013.01); C10N 2030/10 (2013.01); C10N 2030/14 (2013.01); C10N 2030/16 (2013.01); C10N 2030/28 (2020.05); C10N 2040/14 (2013.01)] | 20 Claims |
1. A transformer oil composition, comprising:
a basestock comprising at least 99 wt % of naphthenes and isoparaffins as determined by GC-FID, and less than or equal to 1 wt % total aromatics, as measured by ASTM D7419, based on the total weight of the transformer oil basestock, wherein:
the weight ratio of the naphthenes to the isoparaffins is from 1.2 to 4.0, as measured by GC-MS,
the basestock has a viscosity index (VI) of 80-100, as calculated based on ASTM D2270;
the basestock has an initial boiling point (IBP) of at least 280° C. and a final boiling point (FBP) of at most 380° C.,
the basestock has a distillation range as defined by (FBP-IBP) of at most 100° C., a distillation range as defined by (T90−T10) of at most 60° C., as measured by ASTM D86; and
the basestock has a flash point of at least 145° C., as measured by ASTM D92;
an anti-gassing agent; and
an antioxidant.
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