Observation of Initial Surface Decay of Acrylic Paints Containing TiO<SUB>2</SUB> by Scanning Probe Microscope and Their Lifetime Prediction

概要

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The surface of white paints consisted of acrylic resin and titania pigments were observed by scanning probe microscope (SPM) during a QUV-accelerated weathering test. Three kinds of resins (acryl, acryl-fluorine, and acryl-styrene) were used for the paints. The Z-average roughness (Rz) of the paints increased linearly or exponentialy with QUV exposure time. The gloss of the paints significantly decreased after Rz approached 400 nm, which is the wavelength of visible light. The weatherability of the paints could be predicted by regression of Rz. Monitoring of surface roughness by SPM in the initial stage was useful for the estimation of the lifetime of the paints.
Japan Society of Colour Materialの論文