Facade Paints Based on Filled Styrene-Acrylic Dispersions

Number of journal: 8-2021
Autors:

Fomina N.N.,
Ismagilov A.R.

DOI: https://doi.org/10.31659/0585-430X-2021-794-8-60-66
УДК: 685.34.043

 

AbstractAbout AuthorsReferences
The relevance of the development of domestic competitive paint and varnish materials for construction purposes on a water-dispersion basis is justified. Such developments are hindered by the lack of information on filling, pigmentation and modification of modern water-dispersion binders. Styrene-acrylic dispersions, pigment titanium dioxide, defoamers and other modifying additives of domestic and imported production, as well as mineral fillers – microcalcite and kaolin were used in the studies. It is shown that the styrene-acrylic dispersion Orgal Pst 65 of the Turkish production with an increased content of acrylic links in the copolymer is advisable to use in low-pigmented compositions, and for facade paints with a volume concentration of the pigment part of more than 30%, it is rational to use the domestic dispersion Acrylan 101. The increased foam formation of this dispersion during processing is effectively eliminated by the use of a mineral oils-based defoamer. The amount of pigment titanium dioxide in the facade paint formulation has been optimized – its dosage has been reduced from 9 to 5% by weight by replacing it with kaolin. At the same time, the covering capacity remained at the same level, rheological indicators improved, the consumption of thickener decreased, the degree of whiteness of coatings decreased, which is not critical for facade and base paints. Informative criteria for choosing a pigment based on the dispersion parameters determined by laser analyzers are proposed: a high-quality pigment should have a sufficient number of particles with sizes in the range of 0.2–0.25 microns and the most likely particle size close to 0.25 microns. The domestic TiOx 230 pigment meets these requirements. As a result, an effective recipe for facade paint has been developed, including a binder, pigment and fillers of domestic production, as well as the necessary and sufficient complex of modifying additives. In April 2021, an experimental batch of the developed paint was released and finishing works were carried out on the facade of a residential building.
N.N. FOMINA, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
A.R. ISMAGILOV, Engineer (Postgraduate)

Yuri Gagarin State Technical University of Saratov (77, Politechnicheskaya Street, Saratov, 410054, Russian Federation)

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For citation: Fomina N.N., Ismagilov A.R. Facade paints based on filled styrene-acrylic dispersions. Stroitel’nye Materialy [Construction Materials]. 2021. No. 8, pp. 60–66. (In Russian). DOI: https://doi.org/10.31659/0585-430X-2021-794-8-60-66


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