Tris(2-octyldodecyl)cyclopentane, a low volatility, wide liquid range, hydrocarbon fluid

Tris(2–octyldodecyl)cyclopentane, prepared by the hydrogenation of the product of alkylation of cyclopentadiene by 2–octyldodecanol, is a wide liquid range hydrocarbon fluid (pour point, −57°C; vapour pressure at 20 °C, 1 × 10−12). This new fluid compares favourably with other hydrocarbons and per fluoropolyethers (PFPAEs) in properties useful for vacuum applications in which low temperature fluidity and low volatility are important properties. It is half the density of PFPAE and exhibits inhibitable oxidation properties similar to other hydrocarbons. The pressure-viscosity coefficient is similar to those of PAOs and PFPAEs.