Effect of Polyfluorinated Organophilic Calcites on Properties
of Polyurethanes Prepared from Oligomer Formulations
I. A. Novakov, N. A. Rakhimova, A. V. Nistratov, S. V. Kudashev, and S. Yu. Gugina
Volgograd State Technical University, Volgograd, Russia
Received September 24, 2010
Abstract—The effect of modifiers, polyfluorinated organophilic calcites, on the properties of materials derived
from PDI-1K oligodienediol was examined.
AND POLYMERIC MATERIALS
ISSN 1070-4272, Russian Journal of Applied Chemistry, 2011, Vol. 84, No. 6, pp. 1018–1025. © Pleiades Publishing, Ltd., 2011.
Original Russian Text © I.A. Novakov, N.A. Rakhimova, A.V. Nistratov, S.V. Kudashev, S.Yu. Gugina, 2011, published in Zhurnal Prikladnoi Khimii, 2011,
Vol. 84, No. 6, pp. 995–1003.
Poly(diene urethane) elastomers derived from low-
molecular-weight rubbers are widely used for the pre-
paration of sealants and of sports, roofing, and water-
proofing coatings [1, 2]. At the same time, these
materials exhibit relatively low resistance to light,
heat, wear, and hydrolysis and poor dynamic and
physicomechanical characteristics, which complicates
their use as coatings for sports [2, 3].
One of the most promising ways of polymer
modification is introduction of organophilic mineral
modifier particles [2–4]. It is known that introduction
of such modifiers leads to considerable improvement
of a number of mechanical, dynamic, thermal, barrier,
and other functional properties of large-tonnage
polymers [5–7]. The use of poly- and perfluorinated
compounds for these purposes is promising because of
considerable improvement of the hydrolytic stability,
resistance to light, heat, and water, and other useful
properties of polymeric materials, thanks to unique
nature of poly- and perfluorinated groups [7–9].
It is expected that the use of polyfluorinated com-
pounds in the form of organophilic composites with a
mineral filler such as calcite will favor good com-
patibility of the modifier both with the polymeric
organic matrix and with chalk, the mineral filler tradi-
tionally used for polyurethane elastomers [2, 3, 10, 11].
In this study we examined how modifiers based on
polyfluorinated calcites, used for the first time in the
formulation of filled polyurethane compounds, affect
the properties of the elastomers.
As oligobutadienediol we used a butadiene–
isoprene copolymer of PDI-1K grade [TU (Technical
Specification) 38.103342–88] with 70 : 30 ratio of
monomeric units, molecular weight of 4000–5000, and
0.75–0.89 wt % content of hydroxy groups. The olig-
mer was cured with polymethylene polyphenylene
isocyanate commercially produced under PITs trade
name and containing 29.5–31% isocyanato groups (TU
As chain-branching agent we used glycerol (TU 6-
09-05-816–78). The formulation was cured at 23 ± 2°C
in the presence of a catalyst, di-n-butyltin dilaurate
(DBTDL), taken as a 2.5% solution in white spirit. As
filler for the poly(diene urethane) compound we used
chalk of MTD-2 grade (TU 5743-008-05120542–96).
As organophilic modifiers we used composites
based on natural calcite treated with polyfluorinated
telomeric alcohols (PFAs) of the general formula
OH with the degree of telomerization
n = 2–5. Their content in calcite (wt %) was as follows:
calcite–PFA2 22.58, calcite–PFA3 23.20, calcite–
PFA4 23.90, and calcite–PFA5 24.33. The composites
were prepared as described in [7–9]. The formula of
the poly(diene urethane) compound used for examin-
ing the effect of the modifiers is given in Table 1.
For compounding we used a laboratory ball mill
ensuring homogenization to the solid particle size no
larger than 100 μm (mixing for 12 h).