Abstract
Commercial waterborne acrylic artists' paints have been characterized with pyrolysis - GC - MS, NMR, size exclusion chromatography and FTIR, and thermogravimetry, for establishing chemical composition, solubility behavior, presence of fillers and additives. In all the pigmented formulations, and in one pure medium, the polymeric base has been invariably found to be formed by different amounts of an ethyl acrylate - methyl methacrylate copolymer. A second acrylic medium revealed the presence of \\rm n -butyl acrylate as a third monomer. Pigmented paints were always more difficult to dissolve than pure media, and the occurrence of insoluble material could be demonstrated with titanium white paints. Inorganic components and other additives present in the paint formulations are expected to have some influence on the chemical and molecular evolution of the paints with aging.
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