AND POLYMERIC MATERIALS
Russian Journal of Applied Chemistry, 2011, Vol. 84, No. 2, pp. 284−288.
Pleiades Publishing, Ltd., 2011.
Original Russian Text © N.V. Kryuchkova, Yu.N. Orlov, D.A. Golovacheva, S.V. Levanova, 2011, published in Zhurnal Prikladnoi Khimii, 2011, Vol. 84,
No. 2, pp. 288−292.
Flocculation of Synthetic Latexes with a Quaternary Ammonium
Base Derived From Resin Acids and Rosin
N. V. Kryuchkova
, Yu. N. Orlov
, D. A. Golovacheva
, and S. V. Levanova
Tol’yattikauchuk Limited Liability Company, Togliatti, Samara oblast, Russia
Samara State Technical University, Samara, Russia
Received March 18, 2010
Abstract—The ﬂ occulating effect of a quaternary ammonium compound based on resin acids and rosin in the
course of rubber recovery from SKMS-30 ARK butadiene–α-methylstyrene latex was studied. The agent shows
promise for commercial use.
In commercial production of emulsion rubbers,
particular attention has been given recently to the use
of cationic polyelectrolytes as coagulants. In contrast
to the traditional procedure for rubber recovery from
latexes with sodium chloride, these compounds decrease
the coagulant consumption by a factor of 50–100. The
coagulation becomes weakly sensitive to pH ﬂ uctuations.
Coagulants interact with anionic surfactants stabilizing
the latexes to form an insoluble complex, thus reducing
the discharge of a non-biodegradable precipitate.
Numerous organic coagulants, both synthetic and
natural, are known today [1–4], but all of them have
limited commercial use. Of particular interest are
polymeric quaternary ammonium salts (QASs) having
a set of valuable properties and promising for diverse
industrial applications [5, 6].
In this study we examined the possibility of using
for rubber recovery from latexes a QAS based on resin
acids and rosin, N,N-dimethyl-N-ethyl-N-dehydro-
abietoylammonium bromide (DMEDAAB):
The hydrophenanthrene structure of the hydrocarbon
radical and the polar ammonium group of this compound
are responsible for its ﬂ occulating performance . The
tendency of DMEDAAB to adsorption on the phase
boundary is characterized by the following surfactant
parameters: hydrophilic-lipophilic balance (HLB) 9,
critical micelle concentration (CMC) 5 × 10
maximal adsorption of QAS on the water–air phase
= 4.3 × 10
. The technical
name of the product is Biotsik, because it is mainly
used as biocide in building and pulp-and-paper industry,
and also for recycled wastewater treatment. This agent
has not been used previously as coagulant for synthetic
The goal of this study was to evaluate the ﬂ occulating
performance of DMEDAAB in relation to the coagulant
concentration in a wide range of the dispersed phase and
sulfuric acid concentrations at various temperatures.
In our study we used a 1–2 wt % solution of
DMEDAAB, pH 3. Experiments were performed with
a commercial sample of butadiene–α-methylstyrene
latex SKMS-30 ARK prepared using anionic emulsiﬁ ers:
potassium salts of disproportionated resin and fatty acids
(EDiSKAN 1010-1418) and Leukanol. The colloid-
chemical characteristics of the latex are as follows: dry
residue 20.0%, pH 10.0, mean particle radius 58.5 nm,