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Effect of fluorinated comonomer, polymerizable emulsifier, and crosslinking on water resistance of latex coatings
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SYSNO ASEP 0559912 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Effect of fluorinated comonomer, polymerizable emulsifier, and crosslinking on water resistance of latex coatings Author(s) Machotová, J. (CZ)
Knotek, P. (CZ)
Černošková, E. (CZ)
Svoboda, R. (CZ)
Zárybnická, Lucie (UTAM-F) RID, SAI, ORCID
Kohl, M. (CZ)
Kalendová, A. (CZ)Number of authors 7 Article number 1150 Source Title Coatings. - : MDPI
Roč. 12, č. 8 (2022)Number of pages 18 s. Publication form Online - E Language eng - English Country CH - Switzerland Keywords polyacrylate latex ; polymerizable emulsifier ; crosslinking ; keto-hydrazide reaction ; water resistance ; hydrophobicity ; self-healing OECD category Coating and films Method of publishing Open access Institutional support UTAM-F - RVO:68378297 UT WOS 000846275500001 EID SCOPUS 85137414105 DOI 10.3390/coatings12081150 Annotation Common latex coatings suffer from poor water resistance, which often limits their practical application. This paper reports on the preparation of polyacrylate latexes using various approaches to tune the water resistance, wettability, and surface properties of their coating films. The mutual effects of fluorinated monomer copolymerization, emulsifier type (polymerizable and general), and intra- or interparticle covalent crosslinking (due to allyl methacrylate copolymerization and a ketohydrazide reaction, respectively) were studied. The polyacrylate latexes were synthesized through a two-step semicontinuous emulsion polymerization of 2,2,2-trifluoroethyl methacrylate, butyl acrylate, methyl methacrylate, and methacrylic acid as the basic monomers. The fluorinated monomer was incorporated into the second-step polymer (at a content of 30 wt.% based on the second-step monomer feeds). The water resistance, wettability, and surface properties of the coating films were evaluated
with focus on the water absorption, water whitening, water contact angle, and surface topography using atomic force microscopy. It was found that highly water-resistant and hydrophobic coatings that possessed a self-healing ability were prepared, provided that the polymerizable emulsifier and the fluorinated monomer were involved in the latex synthesis, along with the intra- and interparticle covalent crosslinking.Workplace Institute of Theoretical and Applied Mechanics Contact Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Year of Publishing 2023 Electronic address https://doi.org/10.3390/coatings12081150
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