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M. Oleksy, K. Lecka-Szlachta, M. Heneczkowski, H. Galina

The effect of modified bentonites on the thixotropic properties of coating materials

and their resistance against mold fungi settlement (in English)

Polimery 2013, No 7-8, 562


DOI: dx.doi.org/10.14314/polimery.2013.562

Summary

Biostatic and thixotropic properties of bentonites modified with quaternary ammonium salts (QAS) in a waterborne paint and acrylic lacquer are presented. The fungistatic properties were tested for two commercially available bentonites modified with QAS. The bentonites were added to emulsion acrylic paint and acrylic lacquer in the amount of 2 or 4 wt. %. The resulting compositions were put on gypsum plaster disks and treated with Aspergillus niger and Penicillium chrysogenum, the molds frequently met in human environments. Microbiological tests were performed using procedures consistent with Polish Standards with modifications which stemmed from the materials used. The presence of bentonites modified with QAS substantially improved the resistance of coatings against microorganism colonization. Thixotropic properties of paint compositions containing modified bentonites were also found improved.


Key words: emulsion acrylic paint, acrylic lacquer, bentonites, quaternary ammonium salts, Aspergillus niger, Penicillium chrysogenum, antifungal activity

e-mail: molek@prz.edu.pl

M. Oleksy, K. Lecka-Szlachta, M. Heneczkowski, H. Galina (730.6 KB)
The effect of modified bentonites on the thixotropic properties of coating materials and their resistance against mold fungi settlement (in English)