High Performance Light Stabilizer

a blend of UV absorber and HALS, is developed by Everlight Chemical Industrial Corporation (ECIC) specifically for waterborne clear coats. Southern Pine was chosen for its popularity in the region. Design of Experiment (DOE) was used in this study. Our data confirmed that by increasing the concentration of AQ-1 in the clear top coat can effectively protect Southern Pine from UV light degradation. However, when Southern Pine was is pre-treated with W-1 prior to the application of the same clear top coat, the weatherability is about 50% better than the one without W1 pretreatment. Furthermore, data also suggested that by increasing the coating thickness, the light fastness of Southern Pine can also be improved to some degrees but not as effective as other methods such as increasing the use level of light stabilizers in the clear coat or having the pre-treatment of Southern Pine prior to the application of clear coat.