Russian Journal of Applied Chemistry, 2009, Vol. 82, No. 9, pp. 1706−1710.
Pleiades Publishing, Ltd., 2009.
Original Russian Text
B.N. Maksimov, V.V. Kornilov, B.A. Melnichenko, L.N. Kosareva, 2009, published in Khimicheskaya Promyshlennost’, 2009, Vol. 86,
No. 3, pp. 129−133.
TECHNOLOGY OF ORGANIC
AND INORGANIC CHEMISTRY
Perﬂ uoropolyethers. Synthesis and Application
B. N. Maksimov, V. V. Kornilov, B. A. Melnychenko, and L. N. Kosareva
Russian Scientiﬁ c Center “Applied Chemistry,” St. Petersburg, Russia
Received December 4, 2008
Perﬂ uoropolyethers produced by oxidation of hexa-
ﬂ uoropropylene are fully ﬂ uorinated oligomers of general
which ﬂ uorocarbon links alternate with oxygen atoms.
Such oligomers have a wide range of boiling point, from
50–70°C to 240–320°C at 1 mm Hg in combination
with a low freezing point, up to –60°C and below. At
the same time perforpolyethers have a set of unique
properties : they are highly thermally stable, chemical-
resistant in high aggressive media, not ﬂ ammable, not
toxic, have high dielectric properties, low viscosity
changing properties over a wide temperature range,
good lubricating properties, radiation resistance, and
other. Complex of the above properties allow their use in
various ﬁ elds of modern technology as dielectric ﬂ uids,
coolants, oils, greases.
Some properties of the individual fractions of
perﬂ uoropolyethers are listed in Table 1.
Methods for obtaining the most widely used per-
fluoropolyethers are based on the use of available
industrial feedstock hexafluoropropylene (CF
), one of the main ﬂ uoromonomers for different
ﬂ uoroplastic brands.
The current state of development of technology for
obtaining perﬂ uoropolyethers preceded with extensive
research in this ﬁ eld in several major countries: Russia,
United States, Italy [2–5] in the years of 1970–80.
A possibility of obtaining perfluoropolyethers from
ﬂ uoromonomers by different ways has been investigated
including gas- and liquid-phase methods at various
temperatures, pressures, etc.
The work on technology perfluoropolyethers is
complicated owing to the necessity to ensure safe
conditions for research because peroxides formed at the
oxidation of ﬂ uorooleﬁ ns with oxygen are potentially
Based on literature data and our own research, in the
Center “Applied Chemistry” was studied the process of
synthesis perﬂ uoropolyethers from hexaﬂ uoroproplene as
a raw material. The process is carried out in liquid phase
Table 1. Selected properties of perﬂ uoropolyethers