The Background Technology of the Glass Beads

https://www.tenroadsglass.com/the-background-technology-of-the-glass-beads.html

The glass beads will be spread on the paint soon after applying the paint. The road marking glass beads with a larger diameter can be seen on the surface, while the glass beads with a smaller diameter will be embedded in the paint. The add of road marking glass beads is essential for obtaining road paints with high retro reflectivity. If the glass beads cannot flow freely, it is impossible to disperse the glass beads in the paint. Due to the hydrophilic -OH groups on the glass surface, the moisture may cause small glass beads to agglomerate. The agglomeration can be prevented by modifying the surface of the glass beads with a hydrophobic coating. However, the adhesion between the coating on the glass surface and the paint should be strong. Otherwise, due to the friction, the glass beads can be easily removed in traffic.