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Aging of waterborne paint on the base of acrylic resin emulsion with and without green Luconyl has been investigated by general appearance assessment, adhesion change, FT-IR and discoloration. The obtained results showed that both of paint-formula coatings had no cracks, blisters, flacks and there was no change of adhesion during the aging process. However, IR analysis indicated that there were some changes in chemical structures of coating with and without Green Luconyl during aging process. To be more specific, IR spectrums of initial and aged coating no containing Green Luconyl illustrated aging process led content of O-H and C=C increased significantly but the baseline of spectra was fairly unchanged. For the Green Luconylfilled coating, the baseline of initial coating’s IR spectra exhibited a reduction than that of aged coating while both of coatings (before and after aging) exhibited spectra of similar shape. Moreover, SEM images indicated that the surface morphology of samples changed differently depending on the presence of organic pigment. The surface of aged coating without Luconyl looked rougher than the one with Luconyl after aging process. Hence, the weather aging test had a more significant influence on paint coatings in absence of Luconyl than paint coating in presence of Luconyl. It was explained that the macroradical produced in aging process would attack conjugated double bonds of Luconyl instead of double bonds of AC-261causingthe aged Luconylcoatingto become more opaque than initial while coating unfilled Luconyl had significant changes in its chemical structure during the aging process. Although this was a hypothesis, it was suitable with the obtained results. The paint coating with Luconyl illustrated a significant color change, especially, showed the loss of green color while the other paint coating showed slight color change.

AGING OF WATERBORNE PAINT BASED ON THE ACRYLIC RESIN EMULSION AND ORGANIC PIGMENT