Low T<sub>g</sub> acrylic coatings with high solar reflectivity have been used to great effect as coatings on buildings with low slope roofs to increase the roof substrate service life and to lower the energy consumption of the structure. The growth of biofilms in ponded water areas on a coated roof is a significant issue affecting coating longevity in the field where repeated wet-dry cycles of the biofilm result in premature failure of the coating. An accelerated test method using biofilm isolates from an exterior roof has been developed to quickly characterize biofilm growth as a function of time on elastomeric roof coating. Automated image analysis using CIELAB color space measurements was used to quantify color changes (D<i>E</i>*) on the substrate that correlate to biofilm growth. The effect of the chemical composition of coating filler on biofilm growth in this accelerated test will also be discussed.

Characterization of biofilm growth on acrylic elastomeric coatings with high solar reflectivity using an accelerated test method

Fall 2022 abstracts, posters, and presentations will launch in mid-September.

ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.