| Popis: |
This paper presents the results of natural testing at 3 natural testing stations of the Vietnam-Russia Tropical Center for a period of 5 years on popular polyurethane coating systems. The tropical durability of the product is assessed by the variation of the decorative and protective properties of the coating systems during the test. The study shows that, among the climate-environmental parameters, the order of influence is: UV radiation intensity, sea salt level, temperature-humidity combination, oxidizing agents. The degradation properties of the paint systems are similar, although the degradation rates are different when tested under different conditions. The variation of gloss, thickness, color fastness and anticorrosion effect of the PU paint coatings is highly correlated with the exposure time, showing the possibility of using functions in predicting the working life of these coatings. |
