DICATIONIC IONIC LIQUIDS WITH POLYSILOXANE FRAGMENT IN CATION STRUCTURE AS COOLANTS Russian patent published in 2017 - IPC C07F7/10 C09K5/04 C09K5/10 C07D233/00 

FIELD: chemistry.

SUBSTANCE: dicationic ionic liquids with a polysiloxane fragment in a cation structure of general formula

where R₁ and R₂ - methyl or phenyl, R₃ - CH₂ and (CH₂)₃, n=3-8, as coolants. The properties of the produced ionic liquids (IL) allow to use them in open outer space as coolants. They also have physico-chemical and thermophysical characteristics (viscosity, density, volatility, heat capacity and thermal conductivity) necessary for their use as coolants.

EFFECT: proposed new dicationic ionic liquids with a polysiloxane fragment in the cation structure of general formula I are liquid at normal conditions and have a lower saturated vapor pressure in high temperature region as compared to the prototype and with other known coolants, which ensures their explosion safety and significantly low volatility in the dynamic vacuum.

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