Relationship between the Strengths of the Composite and Binder
E. A. Bondareva, N. V. Sirotinkin, Yu. V. Omel’chuk, and M. G. Davudov
St. Petersburg State Institute of Technology (Technical University), St. Petersburg, Russia
Received May 20, 2009
Abstract—A quantitative relationship between the strengths of a latex compound and the binder, allowing
prediction of the properties of the material, has been revealed.
AND POLYMERIC MATERIALS
ISSN 1070-4272, Russian Journal of Applied Chemistry, 2009, Vol. 82, No. 9, pp. 1620–1623. © Pleiades Publishing, Ltd., 2009.
Original Russian Text © E.A. Bondareva, N.V. Sirotinkin, Yu.V. Omel’chuk, M.G. Davudov, 2009, published in Zhurnal Prikladnoi Khimii, 2009, Vol. 82,
No. 9, pp. 1519–1522.
Choice of latexes for various polymeric compounds
is a topical and complicated problem.
Here we attempt to predict the physicochemical
properties of a compound on the basis of properties of
Both in Russia and in other countries, the most
common are butadiene–styrene latexes. The properties
of materials and goods made of them are quite
satisfactory, and the monomers (butadiene and styrene)
used for their production are cheaper and more readily
available than alternative monomers for similar
Butadiene–styrene latexes are used most widely in
production of finishing materials: paints, spackling
compounds, primers, and relief coatings, which is due,
on the one hand, to fairly high characteristics of latex
films (resistance to hydrolysis, tensile strength,
elongation at break) and, on the other hand, to
relatively low cost and availability of latexes produced
in Russia (BS-65, SKS-65-GP) and in other countries
(Rhodopas SB278, DL950, DL461).
Acrylic latexes are also produced in large amounts.
Acrylic (including styrene–acrylic) emulsion polymers
are used in production of textile and nonwoven articles,
adhesives, polishes, waxes, paper, sealants, and cement
additives. Numerous kinds of acrylic latexes developed
for specific applications are known. In particular, the
glass transition point of latex polymers varies from –80
to +100°C. Some of the latexes show high resistance to
oil or polar solvents. The most valuable property of
acrylic latex polymers is high resistance to light,
compared to butadiene–styrene, butadiene–acrylo-
nitrile, chloroprene, and other polymers.
Weather resistance and longevity (resistance to
degradation under sunlight, to yellowing, to hydro-
lysis) are the main advantages of acrylic polymers.
To prepare a composite, it is necessary to choose a
latex with definite properties: strength, heat resistance,
frost resistance, and elasticity. Latexes are effective
binders for many filters in composites, in particular, for
light hollow glass spheres in heat-insulating materials.
In this study we examined how the strength of a
composite depends on that of the binder, latex
As investigation objects we chose the following
latexes: styrene–acrylate A5, A8, A10; butadiene–styrene–
acrylate A70; butyl acrylate B-2; butyl acrylate–
acrylonitrile BN-2; butyl acrylate–acrylonitrile
containing carboxyl component (methacrylic acid)
Primal E1950; carboxylated acrylate A6000; buta-
diene–styrene BS-65; butadiene–styrene without
carboxy groups SKS-65GP; carboxylated butadiene–
styrene SB 278. We also tested poly(vinyl acetate). As
filler we used borosilicate glass spheres [of MS type,
group A2, TU (Technical Specification) 6-48-108–94].
Modified urea–formaldehyde resin KFZh-M cured
with orthophosphoric acid was used as additive.
Based on the above components, heat-insulation
materials consisting of a binder (latex), a filler (glass