Topic:
Waterborne coatings
Contents:

CONTENTS

4, 46 NEWS

PRODUCTS AND RESEARCH
10 Stability and coagulation of mixed water dispersions of mineral powders and latexes — Prof. Koshevar V. D., PhD Kazhuro I.P.
Abstract:

Systematic study of aggregate stability and coagulation of water binary mixtures of synthetic latexes and mineral powders of different chemical nature and particles sizes depending on the charge and electro kinetic potential of particles, concentration of disperse phases and pH of dispersion medium was performed using photo-sedimentation, differential-thermal, turbidimetry, ζ-photometry, IR-spectroscopy and scanning electron microscopy methods. High aggregate stability of mixed dispersions of acrylic, styrene-butadiene latexes with kaolin and titan dioxide in basic media was established, it is reasoned by the localization of latex particles of colloidal size near negatively charged mineral particles. In acid media (pH=3.5) substantial drop of aggregate stability of these binary systems accompanied by the formation of flaky non-dispersible precipitate as a result of homo- and hetero-coagulation processes taking place. The stability of binary mixtures of all investigated latexes and microcalcite is much less dependent of chemical nature of latexes and changes of pH of the medium. Possible reasons of such behavior of the compositions being
studied are discussed.
Keywords: kaolin, titanium dioxide, microcalcite, latexes, mixed dispersions, aggregate stability, electro kinetic
potential, heterocoagulation.


34 Photo-curing paints for optical fiber production — Prof. Babkin O. E., Babkina L. A., Il’ina V. V., Aykasheva O. S., Izotova K. V.
Abstract

article presents the results of research in the field of creating photo-curable paints formulations for color marking of optical cable fibers. Basic compositions of epoxy acrylate lacquer with pigment pastes, which differ in photoinitiation systems, are considered. Based on the analysis of the completeness of the polymerization of the obtained coatings, conclusions were drawn about the efficiency of the considered systems.
Keywords: photo-curable paints, optical fiber, optical cable production.

ECONOMICS AND STATISTICS
19 Water-based materials in the industrial sector: prospects and challenges

RAW MATERIALS. SEMI PRODUCTS AND COATINGS
23 Organic Pigments by SunChemical for Water-based coatings — Nikitina S., Demenok A.

ECOLOGY AND RESOURCE EFFICIENCY
31 Green strategy of MÜNZING CHEMIE — Chernogorova M.

EVENTS
26 In spite of the pandemic. INTERLAKOKRASKA celebrated its anniversary

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