Effect of Additives on Photo-Aging Performance of Polyurethane Coating
Polyurethane (PU) coatings with additives, such as UV-curing monomers and oligomers, ultraviolet absorbing (UVA) and hindered amine (HALS), were accelerated with Xenon lamp to study the effect of additives on photo aging performance of PU coatings. The ageing behavior of samples was evaluated with gloss-meter, chromatic meter, electrochemical impedance spectroscopy (EIS) and scanning electron microscope (SEM).The results indicated that the anti-aging of coating was improved by the synergy effect of 1.5wt.% HALS(Tinuvin 292), 3wt.% UV-curing resin (611B-85) and 1wt.% UVA(UV1130).
Yungang Li, Pengcheng Wang, Liqun Ai, Xiaoming Sang and Jinglong Bu
B. Xiang et al., "Effect of Additives on Photo-Aging Performance of Polyurethane Coating", Advanced Materials Research, Vols. 291-294, pp. 211-214, 2011