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The low retroreflection coefficient of titanium dioxide is mainly due to the influence of its optical properties and usage conditions. The optical properties of titanium dioxide, such as protrusion rate and powder resistance, directly affect its retroreflection performance in hot melt road marking paint. Specifically, when the protrusion rate of titanium dioxide is lower than that of other types of fillers, its gloss retention and powder resistance will be affected, resulting in a decrease in the retroreflection coefficient. In addition, the use environment of titanium dioxide, such as long-term exposure to ultraviolet rays, high temperature environment, etc., will also cause its performance to decline, thereby affecting the retroreflection coefficient.
In order to improve the retroreflection performance of titanium dioxide in hot melt road marking paint, the following measures can be taken:
Select high-quality titanium dioxide to ensure that it has a high protrusion rate and good powder resistance to enhance gloss retention, thereby improving the retroreflection coefficient.
Control the construction temperature to ensure that the titanium dioxide is evenly distributed in the paint to avoid performance degradation due to excessively high or low temperatures.
Spread glass beads evenly. The roundness and size of the beads will also affect the retroreflection coefficient. Therefore, glass beads with a roundness of more than 80% should be selected and ensured to be spread evenly to maximize the retroreflection effect.
Through the above measures, the retroreflection performance of titanium dioxide in hot melt road marking paint can be effectively improved to ensure the clarity and safety of road markings.