DIELECTRIC OR HEAT-TRANSFER FLUID COMPOSITIONS AND USES OF SAME

摘要

A composition including: (a) from 30 to 70% by weight of a mixture of benzyltoluene and dibenzyltoluene, and (b) from 70 to 30% by weight of at least one compound chosen from the C4-C8 aromatic compounds enclosing two benzene rings condensed or bonded to each other by a bond or by a spacer group other than —CH2-, the oligomers of same and the mixtures of same, excluding phenylxylylethane. Also, the use of this composition, with or without phenylxylylethane, depending on the case, as a dielectric and/or heat-transfer fluid, in particular in use conditions at very low temperatures, such as temperatures lower than −40° C., or indeed lower than −60° C. Also, mixtures of these compositions with mineral oils and/or natural or synthetic esters. Finally, devices, in particular electrical devices, incorporating this composition.

主权项

1. A method of using a composition as dielectric fluid and/or heat-transfer fluid, the composition comprising: (a) from 30 to 70% by weight of a mixture of benzyltoluene and dibenzyltoluene, and (b) from 70 to 30% by weight of at least one compound selected from the C14-C18 aromatic compounds containing two benzene rings that are fused or connected to one another by a bond or by a spacer group other than —CH2—, oligomers thereof and mixtures thereof,
the method comprising utilizing the composition as dielectric fluid and/or heat-transfer fluid at usage temperatures below −40° C.