Titanium Dioxide for Road Marking
Titanium dioxide (TiO2) is a naturally occurring mineral that is commonly used in various industries. When it comes to road markings, titanium dioxide is an indispensable ingredient due to its unique optical properties. Its high refractive index ensures excellent brightness and visibility, making road markings highly visible even in low light conditions. This is especially important when driving at night or in adverse weather conditions where visibility is significantly reduced.
In addition to superior visibility, titanium dioxide offers long-lasting durability. Exposure of road markings to harsh environmental conditions such as heavy traffic, extreme temperatures and UV radiation can cause rapid deterioration. However, road markings containing TiO2 are highly resistant to fading, chipping and wear caused by these factors, ensuring a longer service life and lower maintenance costs.
One of the main advantages of using titanium dioxide for road marking is its environmental friendliness. Unlike other pigments, titanium dioxide is non-toxic, non-hazardous and does not pose any health risks to the environment or workers. Additionally, titanium dioxide-based road markings do not release harmful chemicals into the atmosphere, making them a more sustainable option for transportation infrastructure.
Additionally, titanium dioxide has the ability to reflect and scatter light, reducing the need for additional lighting on the road. Not only does this save energy and promote sustainability, it also improves visibility for drivers and pedestrians.
In terms of application, titanium dioxide can be easily incorporated into various road marking materials such as paints, thermoplastics and epoxies. It can be used for a variety of road markings, including centerlines, edgelines, crosswalks and symbols, ensuring a consistent and unified appearance across the road network.
In the paint formulation design, in addition to selecting the appropriate titanium dioxide grade, another key issue is how to determine the optimal use of titanium dioxide. This depends on the need for coating opacity but is also marketed by other factors such as PVC, wetting and dispersing, film thickness, solids content and the presence of other coloring pigments. For room temperature curing solvent-based white coatings, the titanium dioxide content can be selected from 350kg/1000L for high-quality coatings to 240kg/1000L for economical coatings when the PVC is 17.5% or the ratio of 0.75:1. The solid dosage is 70%~50%; for decorative latex paint, when PVC CPVC, the amount of titanium dioxide can be further reduced with the increase of dry hiding power. In some economical coating formulations, the amount of titanium dioxide can be reduced to 20kg/1000L. In high-rise building exterior wall coatings, the content of titanium dioxide can be reduced to a certain proportion, and the adhesion of the coating film can also be increased.