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Stability and Structural and Rheological Properties of Epoxy Emulsions. Stabilization of Emulsions by Polymer Microparticles

  • Macromolecular Compounds and Polymeric Materials
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Abstract

It has been shown that emulsifiers of Emulsogen LCN-287 and OS-20 grades are the most effective for preparing ED-20 resin-based emulsions and the emulsifier Emulsogen LCN-287, for preparing resins NPEL 127, NPEL 128, CHS-EPOXY 520, CHS-EPOXY 530. The optimum concentration of resins in emulsions is 60 wt % and the optimum concentration of emulsifiers Emulsogen LCN-287 and OS-20 is 1×10–2 and 5×10–3 M, respectively. The prepared emulsions are polydisperse (0.1–250 μm, the predominant fraction is 0.1–5 μm) and are characterized by relatively low stability (no more than 7–12 days), the time of their complete settling is 10–20 days. It was found that ED-20 resin and H2O–ED-20 system emulsions are structured non-Newtonian liquid-like systems, the studied imported resins are Newtonian fluids, and emulsions based on them are non-Newtonian fluid. The presence of polymer microparticles improves the stability of emulsions during storage. The most stable are emulsions stabilized with an aqueous acrylic-methacrylic polymer dispersion.

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Notes

  1. Directive 2004/42/EC of the European ParliamentDirective of the European Parliament and of the Council on the limitation of emissions of volatile organic compounds due to the use of organic solvents in certain paints and varnishes and vehicle refinishing products. 2004/42/EC. 21 April 2004.

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Authors and Affiliations

  1. Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus, 220072, Minsk, Belarus

    E. V. Shinkareva

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  1. E. V. Shinkareva
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Correspondence to E. V. Shinkareva.

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Translated from Zhurnal Prikladnoi Khimii, No. 10, pp. 1320–1336, December, 2021 https://doi.org/10.31857/S0044461821100078

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Shinkareva, E.V. Stability and Structural and Rheological Properties of Epoxy Emulsions. Stabilization of Emulsions by Polymer Microparticles. Russ J Appl Chem 94, 1412–1426 (2021). https://doi.org/10.1134/S1070427221100049

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  • DOI: https://doi.org/10.1134/S1070427221100049

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