ISSN 1070-4272, Russian Journal of Applied Chemistry, 2015, Vol. 88, No. 5, pp. 846−851. © Pleiades Publishing, Ltd., 2015.
Original Russian Text © E.V. Shinkareva, N.L. Budeiko, O.A. Sycheva, V.D. Koshevar, 2015, published in Zhurnal Prikladnoi Khimii, 2015, Vol. 88, No. 5, pp. 805−811.
Effect of Silicone Resins and Laminar Filler on Oxidation
of Aluminum Particles with Atmospheric Oxygen.
Heat-Resistant Coatings Based on These Materials
E. V. Shinkareva, N. L. Budeiko, O. A. Sycheva, and V. D. Koshevar
Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus,
ul. Surganova 9/1, Minsk, 220072 Belarus
Received April 29, 2015
Abstract—Oxidation of particles of Stapa 1515 n. 1 aluminum paste and of composites of these particles with
Silres MSE 100 and Silres REN 50 silicone resins and with microtalc was studied by differential thermal and
X-ray diffraction analysis and by electron microscopy. Oxidation of aluminum particles starts at 500°С, whereas
in the presence of resins their oxidation starts at considerably higher temperatures: at 560°C in the presence of
Silres MSE 100 resin and at 800°C in the presence of Silres REN 50 resin. Additional introduction of microtalc
leads to further inhibition of the aluminum oxidation, which starts at 580°C in the presence of Silres MSE 100
resin and at 815°C in the presence of Silres REN 50 resin. The formula of paint based on these materials for
preparing heat-resistant coatings on metals was suggested.
Owing to structural features, silicone resins and their
combinations with other binders exhibit remarkable
properties which practically cannot be reached with
other resins . These resins have several industrial
applications, in particular, as a binder for paint-and-
varnish materials (PVMs) (water-repelling impregnation,
weather-resistant paints for buildings and heat-resistant
paints for exhaust pipes, ventilation shafts, industrial
furnaces, barbeque, combustion chambers, etc.).
The binders used for heat-resistant PVMs are
methylsilicones or methylphenylsilicones in the form of
solution, liquid resin, or aqueous emulsion. Silicone resins
containing only phenyl groups have limited use, because
their major drawback is long retention of thermoplasticity
Silicone resins for heat-resistant PVMs can be used
only in pigmented formulations. The choice of pigments
depends only on the expected operation temperature of
the items. The pigments suitable for the temperature
interval 250–300°С are gas soot, graphite, titanium
dioxide, chromium titanate, zinc chromate, and also
oxides of cobalt, chromium, magnesium, iron, aluminum,
zinc, cadmium, copper, and other metals, and metal salts.
More heat-resistant coatings are obtained when using
such metallic pigments as aluminum powder and zinc
dust or, as their alternative, aluminum and zinc pastes
whose use allows the dust formation to be reduced or fully
eliminated, the production process to be made safer, the
sanitary-hygienic conditions of work and the production
ecology to be improved, high-quality uniform paint to be
obtained, and speciﬁ c features of the production process
to be taken into account.
The protective power of organosilicon coatings can be
evaluated only upon comprehensive consideration of their
physicomechanical properties and deep understanding
and consideration of all physicochemical and mechanical
phenomena occurring in the ﬁ lm-forming base both in the
isolated state and in the course of the coating operation.
At high operation temperatures, the strength of metals
and nonmetals, as a rule, decreases, and the corrosion
resistance of metals decreases also. Therefore, it is