ISSN 1070-4272, Russian Journal of Applied Chemistry, 2008, Vol. 81, No. 8, pp. 1469–1472. © Pleiades Publishing, Ltd., 2008.
Original Russian Text © T.N. Teryaeva, O.V. Kas’yanova, G.M. Rotova, O.V. Kostenko, 2008, published in Zhurnal Prikladnoi Khimii, 2008, Vol. 81, No. 8,
Physicochemical Properties of Ocher Used as Polymer Filler
T. N. Teryaeva, O. V. Kas’yanova, G. M. Rotova, and O. V. Kostenko
Kuzbass State Technical University, Kemerovo, Russia
Received December 27, 2007
Abstract—Principal physicochemical properties of ocher were studied in order to use it as a mineral filler for
AND POLYMERIC MATERIALS
Fillers produced by crushing and processing of
natural minerals, such as, e.g., talc, chalk, kaolin, and
mica, find wide use in manufacture of polymeric com-
posite materials (PCM). Introduction of mineral fillers
into a polymer makes it possible to solve a number of
problems related to materials science (extending the
raw materials base, improving the strength, rigidity,
heat resistance, etc.), technology (controlling the vis-
cosity and thermal stability of melts), and economics
(lowering the production cost of PCM) [1, 2]. How-
ever, the available commercial assortment of domesti-
cally manufactured fillers used on the industrial scale
for synthesis of PCM is limited and cannot satisfy the
diverse and steadily growing requirements of consum-
ers. Therefore, a search for effective fillers of natural
origin, large raw material resources, and low cost is a
Rather promising in this regard for polymer filling
is use of ocher, a readily available and ecologically
safe mineral raw material, whose deposits are present
in sufficient number on the territory of Russia, includ-
ing those in Kuzbass.
Ocher is mostly used as a pigment in production of
paint-and-varnish materials and its properties reported
in the technical literature are the spreading capacity,
light resistance, oil capacity, density, particle size, and
elemental composition, which is insufficient for char-
acterizing a mineral powder as a polymer filler .
There is published evidence about the possible
use of ocher for polymer filling [4–6], but neither rec-
ommendations about the composition of formulations
and necessity for preparation procedures, nor parame-
ters commonly determined for dispersed mineral poly-
mer fillers can be found in the literature.
This communication reports the results of a study
of the physicochemical properties of ocher, which
make it possible to assess its applicability as a polymer
As object of study served ocher of O2 brand [TU
(Technical Specification) 301-10-019–90] from the
Gavrilovskoe deposit (town of Salair, Kemerovo oblast).
It had the following composition (%): Fe
0.05, K 0.26, Cu 0.03, PO
0.57, Cr 0.9, Ca 1.4, Ni 0.003, Mn 0.64, Mg 0.64, and
Standard procedures were employed to find
the density ρ [in accordance with GOST (State Stan-
139], content W of water and volatiles (GOST
728.19), and bulk density ρ
035). The pH
of a water extract, granulometric composition, particle
size d, and specific surface area S
using the methods described in .
The thermochemical properties of ocher were
studied on a Q-1500D derivatograph in air.
The thermal properties of ocher (heat conductivity
λ, specific heat c
) were found using the integrated
thermographic method .
The experimental results were processed in accor-
dance with GOST (MI 2336–2002.GSI) [10, 11].
Ocher is a finely ground goldish yellow powder.
As regards the content of iron oxide hydrate, the ocher
under study is classed as ordinary clayey, with Fe
content of about 17.6%. The outward appearance of
ocher is shown in Fig. 1.