Russian Journal of Applied Chemistry, 2011, Vol. 84, No. 5, pp. 882−887.
Pleiades Publishing, Ltd., 2011.
Original Russian Text © S.S. Nikulin, T.N. Poyarkova, V.M. Misin, 2011, published in Zhurnal Prikladnoi Khimii, 2011, Vol. 84, No. 5, pp. 853−858.
AND POLYMERIC MATERIALS
Prospects for Using the Copolymer
of N,N-Dimethyl-N,N-diallylammonium Chloride
with Acrylamide in Production of Butadiene–Styrene Rubber
S. S. Nikulin
, T. N. Poyarkova
, and V. M. Misin
Voronezh State Academy of Technology, Voronezh, Russia
Voronezh State University, Voronezh, Russia
Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia
Received July 13, 2010
Abstract—The ﬂ occulating performance of a cationic polyelectrolyte, copolymer of N,N-dimethyl-N,N-
diallylammonium chloride with acrylamide, in the recovery of butadiene–styrene rubber from latex was studied
in relation to the concentrations of the dispersed phase and acidifying agent and to the temperature.
Recovery of rubbers from latexes is a labor-,
material-, and power-consuming step of production
of emulsion rubbers. Furthermore, rubber recovery
from latexes is accompanied by the discharge of tens
thousands of tons of mineral salts and other compounds,
which pollute natural water basins. One of such salts is
sodium chloride, whose consumption is relatively large,
up to 250 kg per ton of rubber.
Therefore, search for new coagulants and for
technological solutions allowing reductions in their
consumption, in the water consumption, and in the water
discharge is very important for improving the rubber
recovery process. Published data [1–4] demonstrate
the availability of diverse organic coagulants, both
synthetic and natural, with which the use of inorganic
salts can be fully eliminated or their consumption can be
Of particular interest are polymeric quaternary
ammonium salts exhibiting a set of valuable properties
and showing much promise for industrial applications
. As demonstrated in a review , complete recovery
of rubbers from latexes is attained at relatively low
consumption of these compounds (3–6 kg t
which is hundred times lower compared to the traditional
coagulant. With these salts, the process becomes weakly
sensitive to pH ﬂ uctuations (polymeric quaternary
ammonium salts efﬁ ciently operate in the pH range 2–5).
It is known that these polymeric salts, which are cation-
active products, actively interact with latex emulsiﬁ ers
(salts of carboxylic and sulfonic acids) to form insoluble
salts captured by nascent rubber crumb, which leads to
a reduction in the amount of compounds being discharged
and allows, in part, solution of environmental problems.
However, the polymeric quaternary ammonium salts
and products of their interaction with components of the
emulsion system, when present in rubber, accelerate the
vulcanization , which makes it necessary to adjust the
formulas of rubber stocks.
In view of the above-mentioned positive features, it
seems appropriate to examine the possibility of using
new quaternary ammonium salts, e.g., copolymer of
N,N-dimethyl-N,N-diallylammonium chloride with
acrylamide, for recovering rubbers from latexes.
Introduction of an additional monomer, acrylamide,